This integer overflow was triggered with fuzzing on the virtio-net
device. The integer overflow is from the wrong assumption that the
packets read from or written to the tap device is always larger than the
size of a virtio-net header.
Signed-off-by: Bo Chen <chen.bo@intel.com>
(cherry picked from commit 559faa272a)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This panic was triggered with fuzzing on the virtio-net device. This
commits handles the error explicitly to avoid the panic, which also
makes the fuzzer happy (as panic is treated as bugs).
Signed-off-by: Bo Chen <chen.bo@intel.com>
(cherry picked from commit 4d9a2b17a7)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If the KVM version is too old (pre Linux 5.7) then fetch the CPUID
information from the host and use that in the guest. We prefer the KVM
version over the host version as that would use the CPUID for the
running CPU vs the CPU that runs this code which might be different due
to a hybrid topology.
Fixes: #4918
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
(cherry picked from commit 7c3110e6d5)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This reverts commit 345e65c9c2.
The AArch64 server maintenance is done. Now we can enable the CI again.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
This device emulates a tpm device in cloud-hypervisor. Read and write support
to miminal set of control registers is supported.
Non-control commands will be processed as reads and write to
CRB_DATA_BUFFER. Reads and Writes to this data buffer are forwarded to
swtpm via the configured data_fd.
Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Co-authored-by: Sean Yoo <t-seanyoo@microsoft.com>
Emulator module adds methods required to communicate with swtpm
over Ctrl and Data channels.
Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Co-authored-by: Sean Yoo <t-seanyoo@microsoft.com>
Add SocketDev struct. Methods in SocketDev will be used to read & write
to Ctrl channel created by swtpm.
Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Co-authored-by: Sean Yoo <t-seanyoo@microsoft.com>
Add structures and related methods to process Ctrl requests and responses
from swtpm to tpm library.
Signed-off-by: Praveen K Paladugu <prapal@linux.microsoft.com>
Co-authored-by: Sean Yoo <t-seanyoo@microsoft.com>
There is no need for this test any longer as we have plenty of other
tests that reboot the VM.
Further this test used unmodified bionic image, which not only will be
EOLed soon but also took a long time to shutdown as it still had snapd
installed.
Fixes: #4849
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
TEST=Boot `--disk readonly=on` along with a guest that tries to write
(unmodified hypervisor-fw) and observe that the virtio device thread no
longer panics.
Fixes: #4888
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It's perfectly reasonable to expect if that some virtio threads trigger
libc behaviour that needs mprotect() that all virtio threads would do
the same.
Fixes: #4874
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It is required to close all file descriptors pointing to an opened TAP
device prior to reopening the TAP device; otherwise it will return
-EBUSY as the device can only be opened once (excluding MQ use cases.)
When rebooting the VM the virtio-net threads would still be running and
so the TAP file descriptor may not have been closed. To ensure that the
TAP FD is closed wait for all the epoll threads to exit after receiving the
KILL_EVENT.
Fixes: #4868
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If the memory is not backed by a file then it is possible to enable
Transparent Huge Pages on the memory and take advantage of the benefits
of huge pages without requiring the specific allocation of an appropriate
number of huge pages.
TEST=Boot and see that in /proc/`pidof cloud-hypervisor`/smaps that the
region is now THPeligible (and that also pages are being used.)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
An integer overflow from our virtio-mem device can be triggered
from (misbehaved) guest driver with malicious requests. This patch
handles this integer overflow explicitly and treats it as an invalid
request.
Note: this bug was detected by our virtio-mem fuzzer through 'oss-fuzz'.
Signed-off-by: Bo Chen <chen.bo@intel.com>
To support all virtio-devices, this patch replaces the customized
EpollHelper::run` with customized `EpollHelper::run_with_timeout` for
fuzzing.
Signed-off-by: Bo Chen <chen.bo@intel.com>
When running the glibc and musl integration tests on the CI after each
other skip building the kernel a second time.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This has resulted in the content being indented with spaces rather tabs
per Groovy coding style.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
As huge pages are always MAP_SHARED then where the shared memory would
be checked (for vhost-user and local migration) we can also check
instead for huge pages.
The checking is also extended to cover the memory zones based
configuration as well.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
We can't use MAP_ANONYMOUS and still have huge pages so MAP_SHARED is
effectively required when using huge pages.
Unfortunately it is not as simple as always forcing MAP_SHARED if
hugepages is on as this might be inappropriate in the backing file case
hence why there is additional complexity of assigning to mmap_flags on
each case and the MAP_SHARED is only turned on for the anonymous file
huge page case as well as anonymous shared file case.
See: #4805
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If we do not need an anonymous file backing the memory then do not
create one.
As a side effect this addresses an issue with CoW (mmap with MAP_PRIVATE
but no MAP_ANONYMOUS) when the memory is pinned for VFIO.
Fixes: #4805
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The probing logic wasn't updated to reflect the actual opcodes in use
for io_uring which are vectored read/writes not the unvectored versions.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
After testing, io_uring_is_supported() causes about 38ms of
overhead when creating virtio-blk. By modifying the position
of io_uring_is_supported(), the overhead of creating virtio-blk
is reduced to less than 1ms when we close io_uring.
Signed-off-by: Jinrong Liang <cloudliang@tencent.com>
Since the processing of the console inputs was moved from the VMM thread
to the virtio-console thread (#3061), we have been using the 'FILE_EVENT'
to handle input from stdin/pty/file, which made 'INPUT_EVENT' obsoleted.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Until there is a need for sharing the memory fd with a child process, we
should err on the safe side to close it on exec.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Following the new design proposal to improve the restore codepath when
migrating a VM, all virtio devices are supplied with an optional state
they can use to restore from. The restore() implementation every device
was providing has been removed in order to prevent from going through
the restoration twice.
Here is the list of devices now following the new restore design:
- Block (virtio-block)
- Net (virtio-net)
- Rng (virtio-rng)
- Fs (vhost-user-fs)
- Blk (vhost-user-block)
- Net (vhost-user-net)
- Pmem (virtio-pmem)
- Vsock (virtio-vsock)
- Mem (virtio-mem)
- Balloon (virtio-balloon)
- Watchdog (virtio-watchdog)
- Vdpa (vDPA)
- Console (virtio-console)
- Iommu (virtio-iommu)
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The add_device() function, from the device manager code, takes a
DeviceConfig as a parameter, instead of a VmAddDevice.
The change was originally done as part of 34412c9b41 and it didn't
break Kata Containers because the VmAddDevice and DeviceConfig structs
share most of their fields, besides the optional for serialization
`pci_segment`, which is not used by the client yet.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Considering error messages will be mostly nested, ensuring no
punctuation at the end will make the error log more readable.
Signed-off-by: Bo Chen <chen.bo@intel.com>
With known number of queues and queue events, we can make each of them
more explicit and avoid using vector/direct indexing, which is cleaner
and slightly more efficient.
Signed-off-by: Bo Chen <chen.bo@intel.com>
The the number of queues and associated events is known and fixed. We
can define and use each of them explicitly and avoid using vector (and
hence direct indexing), which is cleaner and slightly more efficient.
Signed-off-by: Bo Chen <chen.bo@intel.com>
The the number of queues and associated events is known and fixed. We
can define and use each of them explicitly and avoid using vector (and
hence direct indexing), which is cleaner and slightly more efficient.
Also, this refactoring makes it clearer that we are not handling "event
queue" events (as "_event_queue" is not being used intentionally).
Signed-off-by: Bo Chen <chen.bo@intel.com>
In this way, the virtio-iommu code can properly report an error when
a wrong number of queues is provided, instead of triggering an
out-of-bound error.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This is preliminary work to ensure a migrated VM is created right before
it is restored. This will be useful when moving to a design where the VM
is both created and restored simultaneously from the Snapshot.
In details, that means the MemoryManager is the object that must be
created upon receiving the config from the source VM, so that memory
content can be later received and filled into the GuestMemory.
Only after these steps happened, the snapshot is received from the
source VM, and the actual Vm object can be created from both the
snapshot and the MemoryManager previously created.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The kernel will trigger a SIGBUS upon hugetlb page faults when there is
no huge pages available. We neither have a way to ensure enough huge
pages available on the host system, nor have a way to gracefully report
the lack of huge pages in advance from Cloud Hypervisor. For these
reasons, we have to avoid using huge pages from the virtio-mem fuzzer to
avoid SIGBUS errors.
Signed-off-by: Bo Chen <chen.bo@intel.com>
These look alarming if you are booting with the a distro kernel which is
now a recommended approach.
See: #4786
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The restore path of MemoryManager is handled specially without
implementing a `Snapshottable:restore()`. Removing the explicit call to
it along the migration code path to avoid confusions.
See: #4783
Signed-off-by: Bo Chen <chen.bo@intel.com>
The systemd journal has a known issue of generating large size logs[1],
which makes it unreliable as a source for retrieving system
information, such as for counting reboot times. This is particularly
problematic on disk-constrained systems, like the VMs we launched for
our integration tests, where the disk size is normally 2GB. By default,
the systemd journal has a size limit of 10% of the size of the
underlying file system (e.g. around 200MB for the VMs of our integration
tests), which would remove archived journal files on demand.
A better alternative to count reboot times is based on information from
`wtmp` (e.g. the login records) which is much more concise and can be
accessed via the `last` command.
[1] https://github.com/systemd/systemd/issues/5285Fixes: #4749
Signed-off-by: Bo Chen <chen.bo@intel.com>
Refresh our README in a consistent style and update it to reflect:
* A recommendation to use binaries
* Clarify our relationship with other Rust based VMMs/Rust-VMM project
* Ensure instructions result in a usable image (cloud-init)
* Simplify script instructions
* Move compilation details elsewhere
* Add Fedora 36 image details
* Point to CLOUDHV as well as Rust Hypervisor Firmware
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In function create_for_size(), when calculating the number
of clusters for the L1 table, it incorrectly divides the total number of
entries in the L1 table by the cluster size. In fact, it should be
divided by the number of entries/addresses that can fit into a cluster.
Signed-off-by: lv.mengzhao <lv.mengzhao@zte.com.cn>
Vdpa now implements the Migratable trait, which allows the device to be
added to the DeviceTree and therefore allows live migrating any vDPA
device that supports being suspended.
Given a vDPA device can't be resumed from a suspended state without
having to reset everything, we don't support pause/resume for a vDPA
device, as well as snapshot/restore (which requires resume to be
supported).
In order for the migration to work locally, reusing the same device on
the same host machine, the vhost-vdpa handler is dropped after the
snapshot has been performed, which allows the destination VM to open the
device without any conflict about the device being busy.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to anticipate for migration support, we need to be able to
create a Vdpa object without VhostKernVdpa object associated with it.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding VHOST_VDPA_GET_CONFIG_SIZE and VHOST_VDPA_SUSPEND to the list of
authorized ioctls for the vmm thread.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When restoring a VM, the BAR type can be found directly from the
snapshot resources. It is more reliable than the previous method which
was using self.use_64bit_bar from VirtioPciDevice because at the time
the BARs are allocated, the VirtioDevice hasn't been restored yet,
meaning the way to determine the value of use_64bit_bar is wrong for a
device like vDPA. At this time, the device type is not known and relying
on the stored resources is the only reliable way.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
With an updated Linux kernel the kernel reprograms the same table entry
in the MSI-X table multiple times. Fortunately it does so with entry
masked (the default.)
The costly part of MSI-X table reprogramming is going out to the host
kernel to update the GSI routing entries. This change makes three
optimisations.
1. If the table entry is unchanged: skip handking updates
2. Only update the GSI routing table if the table entry is unmasked
(this skips extra calls to the ioctl() for reprogramming the
entries.)
3. Only generate a message on entry unmasking if the global MSI-X enable
bit is set.
Fixes: #4273
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In this way, we have all functions related to generate default values of
vm-config structs in the same location.
Signed-off-by: Bo Chen <chen.bo@intel.com>
These have been replaced by members of PayloadConfig and should be
removed in v28.0 (mentioned in v26.0 release notes.)
Fixes: #4737
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This is consistent when considering that some structs have a
`#[derive(Default)`] so it makes sense for the default implementations
to be in the same location.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Place the data structures that are required for constructing a VmConfig
into it's own module from the logic that exists to suppot them.
This is useful as a consumer of the API can now clearly see what data
structures make up the API for creating VMs.
This has no functional change and I made no attempt to clean up the
ordering (it's as in the original file) nor any other clean up.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The RNG device never reads from the guest memory it reads from a file
and writes to the guest memory.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Don't silently ignore the descriptors provided by the guest. This is
consistent with other devices.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
With the guest memory size of 1MB, a valid descriptor size can be close
to the guest memory size (e.g. 1MB) and can contain close to 256k
valid pfn entries (each entry is 4 bytes). Multiplying the queue
size (e.g. 256), there can be close to 64 millions pfn entries to
process in a single request. This is why the oss-fuzz reported a
timeout (with a limit of 60s).
By reducing the guest memory size and the queue size, the worst-case now
is 8 million pfn entries for fuzzing, which can be finished in around 20
seconds according to my local experiment.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This option is needed for the openapi consumer (e.g. Kata Containers) to
load firmware (e.g. td-shim) for booting.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Previously, the API response was always written to stdout, but that may
not be appropriate for all clients.
The client can now control this behaviour as the client API returns the
response in the `Result`.
Fixes: #4703.
Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>
The existing API client only allows access to "VM" operations, so added
a new `simple_api_full_command_with_fds()` that allows access to "VMM"
operations too.
Also added a `simple_api_full_command()` to avoid having to specify the
file descriptors, in a similar manner to `simple_api_command()`.
Fixes: #4701.
Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>
Commit b2d1dd65f3 ("build: Remove "fwdebug" and "common" feature
flags") removed support for common features flag. But some of the
scripts are still using that parameter specifically test related to mshv
hypervisor. Thus fix those scripts by removing common feature flag.
Signed-off-by: Smit Gardhariya <sgardhariya@microsoft.com>
With the virtio-rng device the descriptors that are provided by the
guest must be writable and of non-zero length. Also propagate an error
if writing to the guest memory fails.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This simplifies the CI process but also logical with the existing
functionality under "guest_debug" (dumping guest memory).
Fixes: #4679
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
TDX functionality is not currently available on MSHV but we should not
preclude building a binary that can run on both.
Fixes: #4677
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Adding the support for the user to set the MTU for the vhost-user-net
backend, which allows the integration test to be extended with the test
of the MTU parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adjust MTU logic such that:
1. Apply an MTU to the TAP interface if the user supplies it
2. Always query the TAP interface for the MTU and expose that.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This simplifes the buld and checks with very little overhead and the
fwdebug device is I/O port device on 0x402 that can be used by edk2 as a
very simple character device.
See: #4679
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
As the virt queues are initialized with random bytes from the fuzzing
engine, a descriptor buffer for the available ring can have a very large
length (e.g. up to 4GB). This means there can be up to 1 billion
entries (e.g. page frame number) for virtio-balloon to process a signal
available descriptor (given each entry is 4 bytes). This is the reason
why oss-fuzz reported a hanging issue for this fuzzer, where the
generated descriptor buffer length is 4,278,321,152.
We can avoid this kind of long execution by reducing the size of guest
memory. For example, with 1MB of guest memory, the number of descriptor
entries for processing is limited ~256K.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This function is for really for the transport layer to trigger a device
reset. Instead name it appropriately for the fuzzing specific use case.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add tracing of the VM boot sequence from the point at which the request
to create a VM is received to the hand-off to the vCPU threads running.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add a new feature "tracing" that enables tracing functionality via the
"tracer" crate (sadly features and crates cannot share the same name.)
Setup: tracer::start()
The main functionality is a tracer::trace_scope()! macro that will add
trace points for the duration of the scope. Tracing events are per
thread.
Finish: tracer::end() this will write the trace file (pretty printed
JSON) to a file in the current directory.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add a new "mtu" parameter to the NetConfig structure and therefore to
the --net option. This allows Cloud Hypervisor's users to define the
Maximum Transmission Unit (MTU) they want to use for the network
interface that they create.
In details, there are two main aspects. On the one hand, the TAP
interface is created with the proper MTU if it is provided. And on the
other hand the guest is made aware of the MTU through the VIRTIO
configuration. That means the MTU is properly set on both the TAP on the
host and the network interface in the guest.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This was unfortunately missing from
430bfd38be which disabled the other builds
that rely on the bare metal systems.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
There's no need to delegate the resize operation to the virtio-mem
thread. This can come directly from the vmm thread which will use the
Mem object to update the VIRTIO configuration and trigger the interrupt
for the guest to be notified.
In order to achieve what's described above, the VirtioMemZone structure
now has a handle onto the Mem object directly. This avoids the need for
intermediate Resize and ResizeSender structures.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The fuzzer exercises the inflate, deflate and reporting events of
virtio-balloon via creating three queues and kicking three events.
Signed-off-by: Bo Chen <chen.bo@intel.com>
To make the fuzzer faster and more effective, the guest memory is
setup with a much smaller size (comparing with other virtio device
fuzzers) and a hole between the memory for holding virtio queue and
the rest of guest data. It brings two benefits: 1) avoid writing large
chunk of data from 'urandom' into the available descriptor chain (which
makes the fuzzer faster); 2) reduce substantial amount of overwrites to
the virtio queue data by the data from 'urandom (which makes the fuzzer
more deterministic and hence effective).
Signed-off-by: Bo Chen <chen.bo@intel.com>
With the existing code, `round_up(7, 2)` would generate `6` which is
obviously wrong. Also, following what's done for 'round_down()', the
fixed code does not handle 'alignment == 0' explicitly.
Signed-off-by: Bo Chen <chen.bo@intel.com>
With the existing macro, `align!(7, 4)` would generate `16` which is
obviously wrong. Also, given it is a macro, the compiler catch the error
if the provided 'alignment' is '0'.
Signed-off-by: Bo Chen <chen.bo@intel.com>
There's no need to delegate the resize operation to the virtio-balloon
thread. This can come directly from the vmm thread which will use the
Balloon object to update the VIRTIO configuration and trigger the
interrupt for the guest to be notified.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Given the AMX x86 feature has been made available since kernel v5.17,
and given we don't have any test validating this feature, there's no
need to keep it behing a Rust feature gate.
Fixes#3996
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This makes it consistent with x86_64 and allows the performance metrics
tooling to continue to work on aarch64.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Update the implementation of the process_queue() function to match all
other virtio devices implementations. This solves some issue related to
potential out-of-bound accesses to the former used_desc_heads list.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This reduces the binary size from 7.3M to 6.5M.
Also the build time for a clean build shrinks from 1m28s to 1m14s on my
development machine (an eight-core VM on Azure). This goes against the
conventional wisdom but it is what it is.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
The latest kvm-ioctls contains a breaking change to its API. Now Arm's
get/set_one_reg use u128 instead of u64.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Packages targeting various distributions are now available thanks to the
Open Bulid Service. The SPECS have been moved to a separate repo under
https://github.com/cloud-hypervisor/obs-packaging
which documents how to include pre-compiled binaires in a supported
distribution. Besides the Cloud Hypervisor itself, accompanying pieces
like UEFI bins are available, too.
Any contributions to the packaging can be also accepted in
the aforementioned repo. Further integration with the OBS like PR
validation is to be targeted there, too, as far as it can get. As the
packaging topic has moved in a separate repo, the bundled SPEC became
obsolete is suggested for removal.
Fixes: #4257
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Co-authored-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The fuzzer is focusing on the virtio-pmem code that processes guest
inputs (e.g. virt queues). Given 'flush' is the only virtio-pmem
request, the fuzzer is essentially testing the code for parsing and
error handling.
Signed-off-by: Bo Chen <chen.bo@intel.com>
To make the fuzzers more focused and more efficient, we now provide
default addresses for the descriptor table, available ring, and used
ring, which ensures the virt-queue has a valid memory layout (e.g. no
overlapping between descriptor tables, available ring, and used ring).
Signed-off-by: Bo Chen <chen.bo@intel.com>
Given rate limiter tests are performance related, they need to be tested
on a bare-metal machine. It is now using the same node as the metrics CI.
Signed-off-by: Bo Chen <chen.bo@intel.com>
The helper functions for measuring and parsing the performance of
virtio-net and virtio-block devices are moved to the `test_infra` crate
so that they be reused for integration tests of rate limiter.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Multiple rust-vmm crates must be updated at once given the vm-memory one
has been updated and they all rely on vm-memory.
- vm-memory from 0.8.0 to 0.9.0
- vhost from 0.4.0 to 0.5.0
- virtio-queue from 0.5.0 to 0.6.0
- vhost-user-backend from 0.6.0 to 0.7.0
- linux-loader from 0.4.0 to 0.5.0
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This function starts the 'receive-migration' for the destination VM,
'send-migration' for the source VM, waits for the live-migration
completion, and prints debug information upon errors.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This patch moves the actual test logic and assertions from various
functions to the actual tests, which makes these tests more readable and
easier to debug.
Signed-off-by: Bo Chen <chen.bo@intel.com>
The baremetal CI for x86-64 was disabled while the machines were out for
maintenance. Now that the machines are back up, let's re-enable the full
CI.
This reverts commit 476e30f5cb.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Until the issue #4583 is resolved, we must disable this test given it's
failing quite often on the aarch64 worker.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Removing the option --tdx to specify that we want to run a TD VM. Rely
on --platform option by adding the "tdx" boolean parameter. This is the
new way for enabling TDX with Cloud Hypervisor.
Along with this change, the way to retrieve the firmware path has been
updated to rely on the recently introduced PayloadConfig structure.
Fixes#4556
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Rather than overloading the GED device with the detection of what the
underlying event means move that to a new generic event controller. The
advantage of this is that that the generic event controller can have a
_CRS that covers the memory for the OperationRegion (the ged driver
rejects _CRS entries that contain anything beyond the single interrupt)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The PCI buses should not declare the address space related to the MMIO
config space given it's already declared in the MCFG table and through
the motherboard device PNP0C02 in the DSDT table.
The PCI MMIO config region for the segment was being wrongly exposed as
part of the _CRS for the ACPI bus device (using Memory32Fixed). Exposing
it via this object was ineffectual as the equivalent entry in the
PNP0C02 (_SB_.MBRD) marked those ranges as not usable via the kernel.
Either way, with both devices used by the kernel, the kernel will not
try and use those memory ranges for the device BARs. However under
td-shim on TDX the PNP0C02 device is not on the permitted list of
devices so the the memory ranges were not marked as unusable resulting
in the kernel attempting to allocate BARs that collided with the PCI
MMIO configuration space.
This is based on the kernel documentation PCI/acpi-info.rst which relies
on ACPI and PCI Firmware specifications. And here are the interesting
quotes from this document:
"""
Prior to the addition of Extended Address Space descriptors, the failure
of Consumer/Producer meant there was no way to describe bridge registers
in the PNP0A03/PNP0A08 device itself. The workaround was to describe the
bridge registers (including ECAM space) in PNP0C02 catch-all devices.
With the exception of ECAM, the bridge register space is device-specific
anyway, so the generic PNP0A03/PNP0A08 driver (pci_root.c) has no need
to know about it.
PNP0C02 “motherboard” devices are basically a catch-all. There’s no
programming model for them other than “don’t use these resources for
anything else.” So a PNP0C02 _CRS should claim any address space that is
(1) not claimed by _CRS under any other device object in the ACPI
namespace and (2) should not be assigned by the OS to something else.
The address range reported in the MCFG table or by _CBA method (see
Section 4.1.3) must be reserved by declaring a motherboard resource. For
most systems, the motherboard resource would appear at the root of the
ACPI namespace (under _SB) in a node with a _HID of EISAID (PNP0C02),
and the resources in this case should not be claimed in the root PCI
bus’s _CRS. The resources can optionally be returned in Int15 E820 or
EFIGetMemoryMap as reserved memory but must always be reported through
ACPI as a motherboard resource.
"""
This change has been manually tested by running a VM with multiple
segments (4 segments), and by hotplugging an additional disk to the
segment number 2 (third segment).
From one shell:
"""
cloud-hypervisor \
--cpus boot=1 \
--memory size=1G \
--kernel vmlinux \
--cmdline "root=/dev/vda1 rw console=hvc0" \
--disk path=jammy-server-cloudimg.raw \
--api-socket /tmp/ch.sock \
--platform num_pci_segments=4
"""
From another shell (after the VM is booted):
"""
ch-remote \
--api-socket=/tmp/ch.sock \
add-disk \
path=test-disk.raw,id=disk2,pci_segment=2
"""
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
As 'handle_child_output()' may terminate the test on panic, we need to
cleanup ovs-dpdk setup in advance.
see: #4555
Signed-off-by: Bo Chen <chen.bo@intel.com>
Instead of always fuzzing virt-queues with default values (mostly 0s),
the fuzzer now initializes the virt-queue based on the fuzzed input
bytes, such as the tail position of the available ring, queue size
selected by driver, descriptor table address, available ring address,
used ring address, etc. In this way, the fuzzer can explore the
virtio-block code path with various virt-queue setup.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Use VgicConfig to initialize Vgic.
Use Gic::create_default_config everywhere so we don't always recompute
redist/msi registers.
Add a helper create_test_vgic_config for tests in hypervisor crate.
Signed-off-by: Nuno Das Neves <nudasnev@microsoft.com>
VgicConfig structure will be used for initializing the Vgic.
Gic::create_default_config will be used everywhere we currently compute
redist/msi registers.
Signed-off-by: Nuno Das Neves <nudasnev@microsoft.com>
AArch64 can share the same way of loading payload with x86_64. It makes
the payload loading more consistent between different arches.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
uefi_flash is used when load firmware, that is load payload depends on
device manager. move uefi_flash to memory manager can eliminate the
dependency.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
A new firmware item has been added into payload config, we need
extend ability to load standalone firmware on AArch64.
"load_kernel" method will be the entry of image loading work including
kernel and firmware.
This change is back compatible. So, we can either load firmware through
"-kernel" like before or "-firmware".
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Later, we will load standalone firmware. So, refactor load_kernel
by abstracting load_firmware method.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
It provides fuzzer a reliable way to wait for a sequence of events
to complete for virtio-devices while not using a fixed timeout to
maintain the full speed of fuzzing.
Take virtio-block as an example, the 'queue event' with a valid
available queue setup can trigger a 'completion event'. This is a
meaningful virtio-block code path of processing guest inputs which is
our target for fuzzing virtio devices.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Fetch the whole git repository (not just the specific commit) and use
the github context instead of hardcoded branch.
Unfortunately now that we process the list of revisions correctly it
shows that the checks don't work on aarch64 due to cross limitations so
this has been removed.
Fixes: #4523
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Given the virtio-console is now able to buffer its output when no PTY is
connected on the other end, the device manager code is updated to enable
this. Moving the endpoint type from FilePair to PtyPair enables the
proper codepath in the virtio-console implementation, as well as
updating the PTY resize code, and forcing the PTY to always be
non-blocking.
The non-blocking behavior is required to avoid blocking the guest that
would be waiting on the virtio-console driver. When receiving an
EWOULDBLOCK error, the output will simply be redirected to the temporary
buffer so that it can be later flushed.
The PTY resize logic has been slightly modified to ensure the PTY file
descriptors are closed. It avoids the child process to keep a hold onto
the PTY device, which would have caused the PTY to believe something is
connected on the other end, which would have prevented the detection of
any new connection on the PTY.
Fixes#4521
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Through multiple changes, this patch aims at providing a reliable
solution for detecting the state of the PTY's connection. Being able to
find out when the other end of the PTY is connected is essential to
prevent the loss of data being output through the PTY. When the PTY
isn't connected, the output is buffered through the SerialBuffer, the
same solution that was created for the serial port initially.
Fixes#4521
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Extending and improving both the structure and the trait allows for more
flexibility regarding what can be achieved with the epoll loop. It
allows for a timeout to be configured instead of the default blocking
behavior. There is a new method in the trait to notify the caller that
the timeout has been reached. And there's a new knob to be notified with
the full list of events before the internal code will actually loop over
every event.
All of these new features are not affecting the previous behavior, and
using EpollHelper::run() should be unchanged.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We want to be able to reuse the SerialBuffer from the virtio-devices
crate, particularly from the virtio-console implementation. That's why
we move the SerialBuffer definition to its own crate so that it can be
accessed from both vmm and virtio-devices crates, without creating any
cyclic dependency.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If the epoll_wait() call returns EINTR, this only means a signal has
been delivered before any of the file descriptors registered triggered
an event or before the end of the timeout (if timeout isn't -1). For
that reason, we should simply try to listen on the epoll loop again.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We must limit how much the buffer can grow, otherwise this could lead
the process to consume all the memory on the machine. This could happen
if the output from the guest was very important and nothing would
connect to the PTY for a long time.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Set the maximum number of HW breakpoints according to the value returned
from `Hypervisor::get_guest_debug_hw_bps()`.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Added `Hypervisor::get_guest_debug_hw_bps()` for fetching the number of
supported hardware breakpoints.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
On AArch64, `translate_gva` API is not provided by KVM. We implemented
it in VMM by walking through translation tables.
Address translation is big topic, here we only focus the scenario that
happens in VMM while debugging kernel. This `translate_gva`
implementation is restricted to:
- Exception Level 1
- Translate high address range only (kernel space)
This implementation supports following Arm-v8a features related to
address translation:
- FEAT_LPA
- FEAT_LVA
- FEAT_LPA2
The implementation supports page sizes of 4KiB, 16KiB and 64KiB.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
The goal of this patch is to provide a reliable way to detect when the
other end of the PTY is connected, and therefore be able to identify
when we can write to the PTY device. This is needed because writing to
the PTY device when the other end isn't connected causes the loss of
the written bytes.
The way to detect the connection on the other end of the PTY is by
knowing the other end is disconnected at first with the presence of the
EPOLLHUP event. Later on, when the connection happens, EPOLLHUP is not
triggered anymore, and that's when we can assume it's okay to write to
the PTY main device.
It's important to note we had to ensure the file descriptor for the
other end was closed, otherwise we would have never seen the EPOLLHUP
event. And we did so by removing the "sub" field from the PtyPair
structure as it was keeping the associated File opened.
Fixes#3170
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Reads from the random file may only be partial, e.g., if the random file is an ordinary text
file. When that happens, the device needs to signal to the driver that only parts of the buffer have
been overwritten.
Signed-off-by: Markus Napierkowski <markus.napierkowski@cyberus-technology.de>
Following our recent v26.0 release we can re-enable our live upgrade
tests to try and make it possible for us to move to making LTS releases.
Currently limited to x86-64 as the live upgrade tests fail on aarch64.
Fixes: #3949
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Since our firmware files are still designed to be used via PVH use the
load_kernel() function to load the firmware falling back to legacy
firmware loading if necessary.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Only the ovs-dpdk live-migration tests need to run sequentially as they
use the same ovs-dpdk setup.
This is to reduce our CI time, particularly for the live-migration
and aarch64 jobs.
Signed-off-by: Bo Chen <chen.bo@intel.com>
The documentation states to install qemu-img. This is located in the
package qemu-utils. The documentation imples the binary is wihtin the
qemu-img package, which doesn't exist.
Signed-off-by: Steven Dake <sdake@lambdal.com>
If contributors add this pre-commit hook we should have fewer issues
with build churn on our CI as the most basic checks will pass.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This enables the Windows test module. One basic test is enabled,
while all others are disabled yet for aarch64. Jenkins file is
extended with the corresponding step for aarch64.
installAzureCli() is parametrized.
It seems that transferring a 30GB image would take >= 15 minutes. An
optimization here is having a gzip'ed image to 10GB which would unpack
in 3 minutes. Expect to be quicker than transferring an uncompressed
image while on another network.
Signed-off-by: Anatol Belski <ab@php.net>
This removes the requirement for the tests (dev-dependencies) to build
with all supported toolchains including the MSRV.
See: #4318
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Adding new I/O ports for both the ACPI shutdown and the ACPI PM timer
devices so they can be triggered from both addresses. The reason for
this change is that TDX expects only certain I/O ports to be enabled
based on what QEMU exposes. We follow this to avoid new ports from being
opened exclusively for Cloud Hypervisor.
We have to keep the former I/O ports available given all firmwares
haven't been updated yet. Once we reach a point where we know both Rust
Hypervisor Firmware, OVMF, TDVF and TDSHIM have been updated with the
new port values, we'll be able to remove the former ports.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The current fuzzer defines a 'format' for the random input 'bytes' from
libfuzzer, but this 'format' failed to improve the fuzzing
efficiency. Instead, the 'format' parsing process obfuscates the fuzzer and
makes the fuzzing engine much harder to focus on the actual fuzzing
target (e.g. virtio-block queue event handling). It is actually worse than
simply using the random inputs as the virt queue content for fuzzing.
We can later introduce a different 'format' to the input 'bytes' for
better fuzzing, say focusing more on virito-block fuzzing through
ensuring the virt queue content always has a valid 'available'
descriptor chain to process.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This also ensures that the 'queue_evt' is fully processed, as we enforce
the main thread is waiting for the virtio-block thread to process the
'kill_evt' which is after the 'queue_evt' processing.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Currently the main thread returns immediately after sending a 'queue'
event which is rarely received and processed by the virtio-block
thread (unless system is in high workload). In this way, the fuzzer is
mostly doing nothing and is unable to reproduce its behavior
deterministically (from the same inputs). This patch relies on a
'level-triggered' epoll to ensure a 'queue' event is properly processed
before return from the main thread.
Signed-off-by: Bo Chen <chen.bo@intel.com>
The old API remains usable, and will remain usable for two releases but
we should only advertise the new API.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Introduce a new top level member of VmConfig called PayloadConfig that
(currently) encompasses the kernel, commandline and initramfs for the
guest to use.
In future this can be extended for firmware use. The existing
"--kernel", "--cmdline" and "initramfs" CLI parameters now fill the
PayloadConfig.
Any config supplied which uses the now deprecated config members have
those members mapped to the new version with a warning.
See: #4445
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Whenever starting a test with the capture_output option, both stdout and
stderr pipes are resized to a greater capacity. But the problem is that
when the system call fcntl() fails, we need to know about the error
returned by the system so that we can apply the necessary changes.
This patch simply enhances the error checking and reporting related to
the invocation of fcntl() when trying to resize a pipe.
Refers to #4475
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The test test_virtio_block_topology has been recently failing due to an
error happening in losetup while trying to set the block size. Since
there's no option in losetup for retrying, we took the approach of
programming the expected behavior of creating a loop device relying
directly on the system ioctl LOOP_CONFIGURE. We apply a retry loop based
on the result returned by this ioctl, so that we don't fail on the first
try. We also added a sleep before retrying, hoping this would help the
next iteration to succeed.
Fixes#3494
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Remove the use of 'unwrap()' that assumes the guest address for request
status is always valid, which avoid virtio-block thread panic on
malformed descriptors from the guest.
Signed-off-by: Bo Chen <chen.bo@intel.com>
By checking in the validation logic we get checking for both devices
specified in the initial config but also hotplug too.
Fixes: #4453
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
There are PCI extended capabilities that can't be passed through the VM
as they would be unusable from a guest perspective. That's why we
introduce a way to patch what is returned to the guest when the PCI
configuration space is accessed. The list of patches is created from the
parsing of the extended capabilities in that case, and particularly
based on the presence of the SRIOV and Resizable BAR capabilities.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Steven Dake <sdake@lambdal.com>
The new option parsing for "[..,]" syntax is much stricter and requires
that everything is balanced in terms of brackets. Change the stripping
of the brackets to only strip the first and last one rather than
multiple:
e.g. "[[a,b], [c,d]]" becomes "[a,b],[c,d]" rather than "a,b], [c"
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The parsing is now O(1) as we only consider each character in the input
once and further it removes the need for allocating memory for
reassembling the option parameter.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If the BAR for the VFIO device is marked as prefetchable on the
underlying device ensure that the BAR exposed through PciConfiguration
is also marked as prefetchable.
Fixes problem where NVIDIA devices are not usable with PCI VFIO
passthrough. See related NVIDIA kernel driver bug:
https://github.com/NVIDIA/open-gpu-kernel-modules/issues/344.
Fixes: #4451
Signed-off-by: Steven Dake <sdake@lambdal.com>
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The original value didn't include the size of the entry point structure.
The caused the last entry to be corrupted by other code.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Previously the code used the SmbiosSysInfo structure for that purpose.
Handle 0x0003, DMI type 127, 27 bytes
<TRUNCATED>
Wrong DMI structures length: 130 bytes announced, structures occupy 131 bytes.
Fix this by using the correct structure and padding.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
There is no need to manually implement Clone for some structures.
It is better to explicitly spell out repr(C) to avoid the compiler
reordering the fields.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
It's been observed on the Bionic image that udev and snapd services can
cause some delay in the VM's shutdown. Disabling them before shutting
down the VM improves the reliability of the test.
Also increasing slightly the sleep time to ensure we give the VM enough
time to shutdown before checking the list of events provided by the
event monitor.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Some dependencies are not tracking the latest version in the .toml file
so update all dependencies to the latest version.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The test virtio_net_latency_us recently failed because of the ethr tool
couldn't complete the latency measurement with the following error
message:
Error dialing the latency connection: dial tcp4
:0-\u003e172.19.0.2:8888: connect: connection refused
The "connection refused" error comes from the Golang Dial function which
couldn't complete as expected because there was no server listening on
the specified port at the specified destination.
In other words, the ethr server wasn't ready when the ethr client tried
to connect to it.
The easy way to avoid this problem is simply by increasing the sleep
time between the command spawning the ethr server in the guest and the
command running the ethr client from the host.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since it's not possible to run the integration test test_vfio on Azure
at the moment (because of some nested virtualization issues), we can
temporarily run it on the baremetal CI where we already run some VFIO
tests.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Rather than using the QCOW2 image, rely on the RAW one, the same way the
host relies on this RAW image to boot the first VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The uuid indicates the unique ID of a virtual machine.
cloud-hypervisor takes the uuid passed by libvirt
and uses it to initialize cloud-init.
Signed-off-by: lizhaoxin1 <Lxiaoyouling@163.com>
Move the live migration tests to a 'jammy' worker rather than
'jammy-small'. This type of worker has more CPUs (64 vs 16) and more RAM
(256G vs 64G), which should improve the time it takes to run each test.
With this improvement, the test shouldn't fail anymore due to timeout
being reached.
A second improvement is to reduce the amount of vCPUs created for each
VM. The point is simply to check we can migrate a VM with multiple
vCPUs, therefore using 2 instead of 6 should be enough when possible.
When testing NUMA, we can't lower the amount of vCPUs since there's a
quite complex topology that is expected there.
Also, the total amount of vCPUs is reduced from 12 to 4 (again when not
testing with NUMA).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Fuzz the HTTP API handling code with a minimum HTTP API
receiver (e.g. mocking the behavior of our "vmm" thread).
Signed-off-by: Bo Chen <chen.bo@intel.com>
The parameter "poll_queue" was useful at the time Cloud Hypervisor was
responsible for spawning vhost-user backends, as it was carrying the
information the vhost-user-block backend should have this option enabled
or not.
It's been quite some time that we walked away from this design, as we
now expect a management layer to be responsible for running vhost-user
backends.
That's the reason why we can remove "poll_queue" from the DiskConfig
structure.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Improve error catching on the steps creating the block device so that we
can understand if qemu-img or losetup is the faulty command leading to
an empty device path.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Both of these tests have been sporadically failing through multiple CI
runs. The reason is related to cloud-init which fails to run the
"init-local" script during the second boot of the VM. This causes the
network interface to not be available, and therefore the test can't SSH
into the VM as expected. The root cause is the filesystem and cache
corruption that happens on the cloud-init disk.
The way to prevent from this issue is to sync the guest filesystem
before we shut it down, and as a security harness, we also wait for a
few seconds for the shutdown command to complete inside the guest before
we trigger the API shutdown or delete.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that we rely on pop_descriptor_chain() rather than iter() to iterate
over a queue, there's no more borrow on the queue itself, meaning we can
invoke add_used() directly for the iteration loop. This simplifies the
processing of the queues for each virtio device, and bring some possible
performance improvement given we don't have to iterate twice over the
list of descriptors to invoke add_used().
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Using pop_descriptor_chain() is much more appropriate than iter() since
it recreates the iterator every time, avoiding the queue to be borrowed
and allowing the virtio-net implementation to match all the other ones.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The new virtio-queue version introduced some breaking changes which need
to be addressed so that Cloud Hypervisor can still work with this
version.
The most important change is about removing a handle to the guest memory
from the Queue, meaning the caller has to provide the guest memory
handle for multiple methods from the QueueT trait.
One interesting aspect is that QueueT has been widely extended to
provide every getter and setter we need to access and update the Queue
structure without having direct access to its internal fields.
This patch ports all the virtio and vhost-user devices to this new crate
definition. It also updates both vhost-user-block and vhost-user-net
backends based on the updated vhost-user-backend crate. It also updates
the fuzz directory.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
There is no point in wasting resources building use Jenkins if the
change only modifies the fuzzers.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Adding a new limitation related to the TDX guest kernel as it doesn't
allow for most ACPI devices, meaning the PCI hotplug through ACPI isn't
supported unless we use 'tdx_disable_filter' boot parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Handle the case `body_offset` is `None` instead of calling `unwrap()`
which leads to a panic.
Signed-off-by: Maximilian Nitsch <maximilian.nitsch@d3tn.com>
When starting the VM such that it is already on a breakpoint (via
stop_on_boot) when attached to gdb then start the vCPUs in a paused
state rather than starting the vCPUs later (upon resume).
Further, make the resumption/break of the VM more resilient by only
attempting to resume the vCPUs if were are already in a break point and
only attempting to pause/break if we were already running.
Fixes: #4354
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Remove the hardcoded addresses.
Also remove PM_TMR_BLK as spec compliant implementation will use
X_PM_TMR_BLK over this field.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The field can be set directly.
This eliminates one place where dyn Device is used outside of KVM
aarch64 code.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
The code was moved from the vmm crate to the hypervisor crate. After the
move it is trivially obvious that it only works with KVM. Use concrete
types where possible.
This allows us to drop create_device from the Vm trait.
No functional change intended.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
The original code uses kvm_device_attr directly outside of the
hyeprvisor crate. That leaks hypervisor details.
No functional change intended.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Whenever a virtio reset happens, the vhost-user backend should be
notified that the vring should be stopped. This is performed by calling
GET_VRING_BASE on the appropriate queue indexes.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Rather than relying on the amount of queues to enable or disable the
queue that have been activated, we rely on the actual queue indexes
provided through the tuple including the queue index, the Queue and the
EventFd. By storing the list of indexes, we simplify the code and also
make it more accurate in case some queues aren't activated.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of passing separately a list of Queues and the equivalent list
of EventFds, we consolidate these two through a tuple along with the
queue index.
The queue index can be very useful if looking for the actual index
related to the queue, no matter if other queues have been enabled or
not.
It's also convenient to have the EventFd associated with the Queue so
that we don't have to carry two lists with the same amount of items.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When preparing the activator, we must provide the correct queue index to
clone the right EventFd associated with the queue.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
It's not mandatory for the virtio-fs driver to enable all virtqueues
provided by the backend since all it needs is one request queue to work
correctly. Therefore we lower the minimal amount of enabled queues to 1.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
It might sometimes take a few seconds for the guest to trigger the OOM
and report it back to the host. That's why this patch adds some sleep
time between the command in the guest supposedly triggering the OOM and
the check of the balloon size from the host.
Fixes#4336
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This requires making get/set_lapic_reg part of the type.
For the moment we cannot provide a default variant for the new type,
because picking one will be wrong for the other hypervisor, so I just
drop the test cases that requires LapicState::default().
Signed-off-by: Wei Liu <liuwe@microsoft.com>
CpuId is an alias type for the flexible array structure type over
CpuIdEntry. The type itself and the type of the element in the array
portion are tied to the underlying hypervisor.
Switch to using CpuIdEntry slice or vector directly. The construction of
CpuId type is left to hypervisors.
This allows us to decouple CpuIdEntry from hypervisors more easily.
No functional change intended.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
We only need to do this for x86 since MSHV does not have aarch64 support
yet. This reduces unnecessary code churn.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
VmState was introduced to hold hypervisor specific VM state. KVM does
not need it and MSHV does not really use it yet.
Just drop the code. It can be easily revived once there is a need.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
It is however only used for KVM right now because MSHV does not need it
yet.
Nonetheless a stub MSHV constructor should be there and get/set
functions should be implemented for MSHV.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Previously, we were assuming that every time an eventfd notified us,
there was only a single event waiting for us. This meant that if,
while one API request was being processed, two more arrived, the
second one would not be processed (until the next one arrived, when it
would be processed instead of that event, and so on). To fix this,
make sure we're processing the number of API and debug requests we've
been told have arrived, rather than just one. This is easy to
demonstrate by sending lots of API events and adding some sleeps to
make sure multiple events can arrive while each is being processed.
For other uses of eventfd, like the exit event, this doesn't matter —
even if we've received multiple exit events in quick succession, we
only need to exit once. So I've only made this change where receiving
an event is non-idempotent, i.e. where it matters that we process the
event the right number of times.
Technically, reset requests are also non-idempotent — there's an
observable difference between a VM resetting once, and a VM resetting
once and then immediately resetting again. But I've left that alone
for now because two resets in immediate succession doesn't sound like
something anyone would ever want to me.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Some `arch_target = "arm"' usages on VCPU related code are not correct.
And we don't support 32-bit ARM architecture.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Function `system_registers` took mutable vector reference and modified
the vector content. Now change the definition to `get/set` style.
And rename to `get/set_sys_regs` to align with other functions.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
On AArch64, the function `core_registers` and `set_core_registers` are
the same thing of `get/set_regs` on x86_64. Now the names are aligned.
This will benefit supporting `gdb`.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
For installing packages for the custom Ubuntu image, we
need to setup DNS inside the chroot.
Signed-off-by: Archana Shinde <archana.m.shinde@intel.com>
The VM specific signal (currently only SIGWINCH) should only be handled
when the VM is running.
The generic VMM signals (SIGINT and SIGTERM) need handling at all times.
Split the signal handling into two separate threads which have differing
lifetimes.
Tested by:
1.) Boot full VM and check resize handling (SIGWINCH) works & sending
SIGTERM leads to cleanup (tested that API socket is removed.)
2.) Start without a VM and send SIGTERM/SIGINT and observe cleanup (API
socket removed)
3.) Boot full VM, delete VM and observe 2.) holds.
4.) Boot full VM, delete VM, recreate VM and observe 1.) holds.
Fixes: #4269
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In the original code:
If the first header was invalid and the second header had the same
sequence number (zero) then the invalid first header would be returned.
The new code is more Rust idiomatic and avoids this situation.
See: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=48858
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
And along with virtio-queue, we must also bump vhost-user-backend from
0.3.0 to 0.5.0 (since it relies on virtio-queue 0.4.0).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The vhost-user backend was always provided the maximum queue size but
this is incorrect. Instead it must be informed of the actual queue size
that has been negotiated with the virtio driver running in the guest.
This ensures proper functioning of vhost-user-block with the Rust
Hypervisor Firmware, which uses a hardcoded queue size of 16.
Partially fixes#4285
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The latest vhost-user specification describes VHOST_USER_RESET_OWNER
command as deprecated with the following explanation:
This is no longer used. Used to be sent to request disabling all
rings, but some back-ends interpreted it to also discard connection
state (this interpretation would lead to bugs). It is recommended that
back-ends either ignore this message, or use it to disable all rings.
Also, it's been observed that when using either Rust Hypervisor Firmware
or EDK2 OVMF firmware with SPDK (using the block device as the boot
disk), the virtio reset that happens when the firmware no longer needs
to access the block device caused a failure by triggering the command
VHOST_USER_RESET_OWNER.
For all these reasons, this patch simplifies the virtio reset
implementation by simply disabling the virtqueues and no longer calling
into VHOST_USER_RESET_OWNER.
Partially fixes#4285
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Enabling the TAP interface is only about the IFF_UP flag, meaning we
shouldn't be testing the presence of IFF_RUNNING, and therefore we
shouldn't set it when not present.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The Linux kernel now checks for this before marking CPUs as
hotpluggable:
commit aa06e20f1be628186f0c2dcec09ea0009eb69778
Author: Mario Limonciello <mario.limonciello@amd.com>
Date: Wed Sep 8 16:41:46 2021 -0500
x86/ACPI: Don't add CPUs that are not online capable
A number of systems are showing "hotplug capable" CPUs when they
are not really hotpluggable. This is because the MADT has extra
CPU entries to support different CPUs that may be inserted into
the socket with different numbers of cores.
Starting with ACPI 6.3 the spec has an Online Capable bit in the
MADT used to determine whether or not a CPU is hotplug capable
when the enabled bit is not set.
Link: https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/05_ACPI_Software_Programming_Model/ACPI_Software_Programming_Model.html?#local-apic-flags
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This check is new in the beta version of clippy and exists to avoid
potential deadlocks by highlighting when the test in an if or for loop
is something that holds a lock. In many cases we would need to make
significant refactorings to be able to pass this check so disable in the
affected crates.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: accessing first element with `data.get(0)`
--> virtio-devices/src/transport/pci_device.rs:1055:34
|
1055 | if let Some(v) = data.get(0) {
| ^^^^^^^^^^^ help: try: `data.first()`
|
= note: `#[warn(clippy::get_first)]` on by default
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#get_first
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Tested:
1. SIGTERM based
2. VM shutdown/poweroff
3. Injected VM boot failure after calling Vm::setup_tty()
Fixes: #4248
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The snapshots are stored in a BTree which is ordered however as the ids
are strings lexical ordering places "11" ahead of "2". So encode the
vCPU id with zero padding so it is lexically sorted.
This fixes issues with CPU restore on aarch64.
See: #4239
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Git will refuse to generate information for the report if the repository
is owned by a different user (root in the container vs the real owner
outside).
e.g:
Error generating human readable git reference: fatal: unsafe repository ('/cloud-hypervisor' is owned by someone else)
To add an exception for this directory, call:
git config --global --add safe.directory /cloud-hypervisor
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It is reasonable for these to fail as it the tool could be run outside
of a git repository but by not giving any error message we cannot see
issues when we expect the report to have the git details.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
By default Microsoft Hypervisor send a GP to the guest if it tries
read/write an unimplemented MSR from the hypervisor prospective. Instead
change this behavior to ignore read/write operations for unimplemented
MSRs
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
When restoring a VM, the restore codepath will take care of mapping the
MMIO regions based on the information from the snapshot, rather than
having the mapping being performed during device creation.
When the device is created, information such as which BARs contain the
MSI-X tables are missing, preventing to perform the mapping of the MMIO
regions.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the VfioCommon implementation, the VfioUserPciDevice now
implements the Migratable trait.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the VfioCommon implementation, the VfioPciDevice now implements
the Migratable trait.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Introduces the common code to handle one aspect of the migration
support. Particularly, the ability to store VMM internal states related
to such device. The internal state of the device will happen later in a
dedicated patchset that will implement the VFIO migration API.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
So that we can save and restore the whole structure through snapshot and
restore operations.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This reverts commit 0d0013c46e.
Grovvy shell script execution engine does not like backslash as the
escape character. So we need to put another backslash to escape the
backslash character. This would most likely fix the issue that we saw
with the CI.
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
In order to conserve resources it is better to not run CI, whenever there
are changes only in fuzz/Cargo.toml or fuzz/Cargo.lock.
Fixes#4148
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
Based on recent KVM host patches (merged in Linux 5.16), it's forbidden
to call into KVM_SET_CPUID2 after the first successful KVM_RUN returned.
That means saving CPU states during the pause sequence, and restoring
these states during the resume sequence will not work with the current
design starting with kernel version 5.16.
In order to solve this problem, let's simply move the save/restore logic
to the snapshot/restore sequences rather than the pause/resume ones.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The vCPU is created and set after all the devices on a VM's boot.
There's no reason to follow a different order on the restore codepath as
this could cause some unexpected behaviors.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Combined the `GicDevice` struct in `arch` crate and the `Gic` struct in
`devices` crate.
After moving the KVM specific code for GIC in `arch`, a very thin wapper
layer `GicDevice` was left in `arch` crate. It is easy to combine it
with the `Gic` in `devices` crate.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
In order to ensure that the virtio device thread is spawned from the vmm
thread we use an asynchronous activation mechanism for the virtio
devices. This change optimises that code so that we do not need to
iterate through all virtio devices on the platform in order to find the
one that requires activation. We solve this by creating a separate short
lived VirtioPciDeviceActivator that holds the required state for the
activation (e.g. the clones of the queues) this can then be stored onto
the device manager ready for asynchronous activation.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
As coredump function is to make a vmcore for crash tool to analyze,
in order not to introduce a big thing in integration, we just check
if ch-remote command runs no error report here.
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Based on the newly added guest_debug feature, this patch adds http
endpoint support.
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Co-authored-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The crash tool use a special note segment which named 'QEMU' to
analyze kaslr info and so on. If we don't add the 'QEMU' note
segment, crash tool can't find linux version to move on.
For now, the most convenient way is to add 'QEMU' note segment to
make crash tool happy.
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Guest memory is needed for analysis in crash tool, so save it
for coredump.
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Co-authored-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
It's useful to dump the guest, which named coredump so that crash
tool can be used to analysize it when guest hung up.
Let's add GuestDebuggable trait and Coredumpxxx error to support
coredump firstly.
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Co-authored-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The error message incorrectly said that the user was trying to combine
cache_size without dax whereas it is only usuable with dax.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Remove the code from the DeviceManager that prepares the DAX cache since
the functionality has now been removed.
Fixes: #3889
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
`GicDevice` trait was defined for the common part of GicV3 and ITS.
Now that the standalone GicV3 do not exist, `GicDevice` is not needed.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Why combine:
- GicV3 is not required alone
- GicV3 and GicV3Its has separate snapshot/pause code. But the code of
GicV3 was never used.
- Reduce the code complexity of GIC related traits and structs.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
From the logs it appears that booting the VM to the point at which it
can signal to the host can sometimes take longer than then 30 seconds
specified.
Fixes: #4136
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Refactoring and features in this patch:
- Add support for aarch64 build
- Add offline build configuration using vendored crates
- Add script to generate vendored sources
- Fix openssl-sys dependency
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
This reverts commit 6a099257e8.
It is now clear that pinning the toolchain for cross compilation is not
necessary since we only use it for building to aarch64:
https://github.com/rust-lang/rust/issues/95926#issue-1199547707
"This problem doesn't currently show up when cross-compiling from x86_64
to aarch64, since aarch64 doesn't use static-pie by default, but
enabling PIE with -C relocation-model=pie triggers the same bug and
makes the resulting binaries segfault."
Fixes: #3962
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows the capturing of the debug port event without requiring more
verbose logging which itself has a performance impact.
Unless users are using our custom kernel or their own custom patches
they are unlikely to see the impact.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This reverts commit f160572f9d.
There has been increased flakiness around the live migration tests since
this was merged. Speculatively reverting to see if there is increased
stability.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to ensure that the virtio device thread is spawned from the vmm
thread we use an asynchronous activation mechanism for the virtio
devices. This change optimises that code so that we do not need to
iterate through all virtio devices on the platform in order to find the
one that requires activation. We solve this by creating a separate short
lived VirtioPciDeviceActivator that holds the required state for the
activation (e.g. the clones of the queues) this can then be stored onto
the device manager ready for asynchronous activation.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The current patch fixes the following error that was raised by clippy:
error: this let-binding has unit value
--> tests/integration.rs:6538:13
|
6538 | / let _ = stdin
6539 | | .write_all("type=7".as_bytes())
6540 | | .expect("failed to write stdin");
| |_________________________________________________^
|
= note: `-D clippy::let-unit-value` implied by `-D warnings`
= help: for further information visit
https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
help: omit the `let` binding
|
6538 ~ stdin
6539 + .write_all("type=7".as_bytes())
6540 + .expect("failed to write stdin");
|
error: could not compile `cloud-hypervisor` due to previous error
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Latest cargo beta version raises warnings about unused macro rules.
Simply remove them to fix the beta build.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Cut and paste doesn't quite work. Not that cut and pasters will get
this far along, but the docs should be correct in any regards.
Signed-off-by: Steven Dake <steven.dake@gmail.com>
The qemu-img tool is used as part of the tutorial but is not installed
by default on a fresh ubuntu 22.04 server.
Signed-off-by: Steven Dake <steven.dake@gmail.com>
There is no need to include serde_derive separately,
as it can be specified as serde feature instead.
Signed-off-by: Maksym Pavlenko <pavlenko.maksym@gmail.com>
In this way, we can cover a broad range of events from the event monitor
while avoiding code duplication.
Fixes: #4054
Signed-off-by: Bo Chen <chen.bo@intel.com>
Rely on the newly added helper from vm-virtio crate to keep cloning the
list of Queue structures.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since the QueueState structure has been updated by not implementing
Clone anymore, we need a way to keep cloning the Queue.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This variable name is residual from when these functions acted directly
on the vCPU fd rather than the hypervisor wrapper.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Explicitly re-export types from the hypervisor specific modules. This
makes it much clearer what the common functionality that is exposed is.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
All the required functionality is already exported from the hypervisor
crate so for consistency make this module private.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
And thus only export what is necessary through a `pub use`. This is
consistent with some of the other modules and makes it easier to
understand what the external interface of the hypervisor crate is.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Move this enum from vm-device to hypervisor crate so that hypervisor
crate does not gain an extra dependency.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
By taking advantage of the fact that IrqRoutingEntry is exported by the
hypervisor crate (that is typedef'ed to the hypervisor specific version)
then the code for handling the MsiInterruptManager can be simplified.
This is particularly useful if in this future it is not a typedef but
rather a wrapper type.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This removes the requirement to leak as many datastructures from the
hypervisor crate into the vmm crate.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The trait and functionality is about operations on the VM rather than
the VMM so should be named appropriately. This clashed with with
existing struct for the concrete implementation that was renamed
appropriately.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Whenever going through the codepath of loading a RAW firmware, we always
add an extra RAM region to the guest memory through the memory manager.
But we must be careful to use the updated guest memory rather than a
previous reference that wasn't containing the new region, as this can
lead to the following error:
VmBoot(FirmwareLoad(InvalidGuestAddress(GuestAddress(4290772992))))
This is fixed by the current patch, getting the latest reference onto
the guest memory from the memory manager right after the new region has
been added.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We can return prematurely from 'map_mmio_regions()' (e.g. when a mmap call
failed for vfio or 'create_user_memory_region()' failed for vfio-user)
without updating the 'MmioRegion::user_memory_regions' with the
information of previous successful mmaps, which in turn would cause mmap
leaks particularly for the case of hotplug where the 'vmm' thread will
keep running. To fix the issue, let's keep 'MmioRegion::user_memory_regions'
updated right after successful mmap calls.
Fixes: #4068
Signed-off-by: Bo Chen <chen.bo@intel.com>
This is required when hot-removing a vfio-user device. Details code path
below:
Thread 6 "vcpu0" received signal SIGSYS, Bad system call.
[Switching to Thread 0x7f8196889700 (LWP 2358305)]
0x00007f8196dae7ab in shutdown () at ../sysdeps/unix/syscall-template.S:78
78 T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
(gdb) bt
0x00007f8196dae7ab in shutdown () at ../sysdeps/unix/syscall-template.S:78
0x000056189240737d in std::sys::unix::net::Socket::shutdown ()
at library/std/src/sys/unix/net.rs:383
std::os::unix::net::stream::UnixStream::shutdown () at library/std/src/os/unix/net/stream.rs:479
0x000056189210e23d in vfio_user::Client::shutdown (self=0x7f8190014300)
at vfio_user/src/lib.rs:787
0x00005618920b9d02 in <pci::vfio_user::VfioUserPciDevice as core::ops::drop::Drop>::drop (
self=0x7f819002d7c0) at pci/src/vfio_user.rs:551
0x00005618920b8787 in core::ptr::drop_in_place<pci::vfio_user::VfioUserPciDevice> ()
at /rustc/7737e0b5c4103216d6fd8cf941b7ab9bdbaace7c/library/core/src/ptr/mod.rs:188
0x00005618920b92e3 in core::ptr::drop_in_place<core::cell::UnsafeCell<dyn pci::device::PciDevice>>
() at /rustc/7737e0b5c4103216d6fd8cf941b7ab9bdbaace7c/library/core/src/ptr/mod.rs:188
0x00005618920b9362 in core::ptr::drop_in_place<std::sync::mutex::Mutex<dyn pci::device::PciDevice>> () at /rustc/7737e0b5c4103216d6fd8cf941b7ab9bdbaace7c/library/core/src/ptr/mod.rs:188
0x00005618920d8a3e in alloc::sync::Arc<T>::drop_slow (self=0x7f81968852b8)
at /rustc/7737e0b5c4103216d6fd8cf941b7ab9bdbaace7c/library/alloc/src/sync.rs:1092
0x00005618920ba273 in <alloc::sync::Arc<T> as core::ops::drop::Drop>::drop (self=0x7f81968852b8)
at /rustc/7737e0b5c4103216d6fd8cf941b7ab9bdbaace7c/library/alloc/src/sync.rs:1688
0x00005618920b76fb in core::ptr::drop_in_place<alloc::sync::Arc<std::sync::mutex::Mutex<dyn pci::device::PciDevice>>> ()
at /rustc/7737e0b5c4103216d6fd8cf941b7ab9bdbaace7c/library/core/src/ptr/mod.rs:188
0x0000561891b5e47d in vmm::device_manager::DeviceManager::eject_device (self=0x7f8190009600,
pci_segment_id=0, device_id=3) at vmm/src/device_manager.rs:4000
0x0000561891b674bc in <vmm::device_manager::DeviceManager as vm_device::bus::BusDevice>::write (
self=0x7f8190009600, base=70368744108032, offset=8, data=&[u8](size=4) = {...})
at vmm/src/device_manager.rs:4625
0x00005618921927d5 in vm_device::bus::Bus::write (self=0x7f8190006e00, addr=70368744108040,
data=&[u8](size=4) = {...}) at vm-device/src/bus.rs:235
0x0000561891b72e10 in <vmm::vm::VmOps as hypervisor::vm::VmmOps>::mmio_write (
self=0x7f81900097b0, gpa=70368744108040, data=&[u8](size=4) = {...}) at vmm/src/vm.rs:378
0x0000561892133ae2 in <hypervisor::kvm::KvmVcpu as hypervisor::cpu::Vcpu>::run (
self=0x7f8190013c90) at hypervisor/src/kvm/mod.rs:1114
0x0000561891914e85 in vmm::cpu::Vcpu::run (self=0x7f819001b230) at vmm/src/cpu.rs:348
0x000056189189f2cb in vmm::cpu::CpuManager::start_vcpu::{{closure}}::{{closure}} ()
at vmm/src/cpu.rs:953
Signed-off-by: Bo Chen <chen.bo@intel.com>
Since both Net and vhost_user::Net implement the Migratable trait, we
can factorize the common part to simplify the code related to the net
creation.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since both Block and vhost_user::Blk implement the Migratable trait, we
can factorize the common part to simplify the code related to the disk
creation.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Extend the validate() function for both DiskConfig and NetConfig so that
we return an error if a vhost-user-block or vhost-user-net device is
expected to be placed behind the virtual IOMMU. Since these devices
don't support this feature, we can't allow iommu to be set to true in
these cases.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Reorganizing the code to leverage the same mechanics implemented for
vfio-user and aimed at supporting sparse memory mappings for a single
region.
Relying on the capabilities returned by the vfio-ioctls crate, we create
a list of sparse areas depending if we get SPARSE_MMAP or MSIX_MAPPABLE
capability, or a single sparse area in case we couldn't find any
capability.
The list of sparse areas is then used to create both the memory mappings
in the Cloud Hypervisor address space and the hypervisor user memory
regions.
This allowed for the simplification of the MmioRegion structure.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This is a cleaner approach to handling the I/O port write to 0x80.
Whilst doing this also use generate the timestamp at the start of the VM
creation. For consistency use the same timestamp for the ARM equivalent.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
We don't use the VmmOps trait directly for manipulating memory in the
core of the VMM as it's really designed for the MSHV crate to handle
instruction decoding. As I plan to make this trait MSHV specific to
allow reduced locking for MMIO and PIO handling when running on KVM this
use should be removed.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Instead of always creating a single large mmap for the MMIO region of a
BAR, we create multiple mmaps for the BARs that need multiple kvm user
memory regions. In this way, we can simplify 'unmap_mmio_regions()' (by
reusing information kept from 'MmioRegion::user_memory_region').
Signed-off-by: Bo Chen <chen.bo@intel.com>
To correctly map MMIO regions to the guest, we will need to wait for valid
MMIO region information which is generated from 'PciDevice::allocate_bars()'
(as a part of 'DeviceManager::add_pci_device()').
Signed-off-by: Bo Chen <chen.bo@intel.com>
To prepare the support of region capabilities, this commit factorizes
the `VFIO_USER_DEVICE_GET_REGION_INFO` operation in its own function. In
this process, it also removes the need of the hard-coded arbitrary value
for `vfio_region_info.argsz` (the maximum size of the reply payload).
Signed-off-by: Bo Chen <chen.bo@intel.com>
Similar to what's being supported for vfio devices, vfio-user devices
may also have BARs that need multiple kvm user memory regions,
e.g. device regions with `VFIO_REGION_INFO_CAP_SPARSE_MMAP`.
Signed-off-by: Bo Chen <chen.bo@intel.com>
For devices that cannot be named by the user use the "__" prefix to
identify them as internal devices. Check that any identifiers provided
in the config do not clash with those internal names. This prevents the
user from creating a disk such as "__serial" which would then cause a
failure in unpredictable manner.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Whenever a device (virtio, vfio, vfio-user or vdpa) is hotplugged, we
must verify the provided identifier is unique, otherwise we must return
an error.
Particularly, this will prevent issues with identifiers for serial,
console, IOAPIC, balloon, rng, watchdog, iommu and gpio since all of
these are hardcoded by the VMM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
All hotpluggable devices were properly removed from the VmConfig when a
remove-device command was issued, except for the "fs" type. Fix this
lack of support as it is causing the integration tests to fail with the
recent addition of verifying that identifiers are unique.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The device identifiers generated from the DeviceManager were not
guaranteed to be unique since they were not taking the list of
identifiers provided through the configuration.
By returning the list of unique identifiers from the configuration, and
by providing it to the DeviceManager, the generation of new identifiers
can rely both on the DeviceTree and the list of IDs from the
configuration.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This prevents a conflict since the old API socket will not have been
cleaned up (due to the use of SIGKILL.)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The socket will safely deleted on shutdown and so it is not necessary to
delete the API socket when starting the HTTP server.
Fixes: #4026
Signed-off-by: LiHui <andrewli@kubesphere.io>
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Start loading the kernel as possible in the VM in a separate thread.
Whilst it is loading other work can be carried out such as initialising
the devices.
The biggest performance improvement is seen with a more complex set of
devices. If using e.g. four virtio-net devices then the time to start the
kernel improves by 20-30ms. With the simplest configuration the
improvement was of the order of 2-3ms.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows the same code for generating the kernel command line to be
used on both aarch64 and x86_64 when the latter starts loading the
kernel in asynchronously.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This is not required for x86_64 and maintains a tight coupling between
kernel loading and the DeviceManager.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This reverts commit 87eed369cd.
The reason we're reverting this is that OpenAPI Specification[0] doesn't
know how to deal with unsigned types. :-/
Right now the best to do is keep it as it's, as an int64, and try to fix
OpenAPI, or even switch to swagger, as the latter knows how to properly
deal with those. However, switching to swagger is far from being an 1:1
transition and will require time to experiment, thus reverting this for
now seems the best approach.
[0]: https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#data-types
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
The Token Bucket fields are, on the Cloud Hypervisor side, u64.
However, we expose those as int64 in the OpenAPI YAML file.
With that in mind, let's adjust the yaml file to expose those as uint64.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
This means that the automatic enabling of the virtio-iommu will also be
applied to VMs creates via the API as well as the CLI.
Fixes: #4016
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Improve the request parsing/handling code by allowing an error status to
be returned back to the guest driver before we return an error
internally.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Extend the Domain structure to store the information about each domain
being in bypass mode or not. Based on this new information, the address
translation of the virtio devices is performed according to the bypass
mode of each domain. And both MAP/UNMAP requests are generating errors
in case the domain has been previously set to bypass mode.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for associating more than mappings with a domain, we
factorize the list of mappings associated with a domain behind a
dedicated Domain structure. We also update the field name so that it
reads better in the code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Exposing the VIRTIO_IOMMU_F_BYPASS_CONFIG feature to the guest, which
allows to update the bypass global knob through virtio configuration.
Based on the value of this global knob, the address translations for
endpoints that have not been added to a domain is allowed with a simple
identity mapping.
By default, we enable the bypass mode for all endpoints that are not
attached to any domain.
Fixes#3987
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the VIRTIO specification, we must be able to support multiple
endpoints per domain. This is fixed along with the introduction of some
simplification regarding how we can retrieve the external mapping
directly based on the endpoint.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If using the ACPI based hotplug only memory can be added so if the
hotplug RAM size is the same as the boot RAM size then do not include
the memory manager DSDT entries.
Also: this change simplifies the code marginally by making the
HotplugMethod enum Copyable.
This was identified from the following perf output:
1.78% 0.00% vmm cloud-hypervisor [.] <vmm::memory_manager::MemorySlots as acpi_tables::aml::Aml>::append_aml_bytes
|
---<vmm::memory_manager::MemorySlots as acpi_tables::aml::Aml>::append_aml_bytes
<vmm::memory_manager::MemorySlot as acpi_tables::aml::Aml>::append_aml_bytes
acpi_tables::aml::Name::new
<acpi_tables::aml::Path as acpi_tables::aml::Aml>::append_aml_bytes
__libc_malloc
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
No further changes are necessary that adding a #[derive(Error)] as there
is a manual implementation of Display.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Extend VfioCommon to simplify the overall code, and also in preparation
for supporting the restore code path.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Extend VfioCommon structure to own the legacy interrupt manager. This
will be useful for implementing the restore code path.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Extend VfioCommon structure to own the MSI interrupt manager. This will
be useful for implementing the restore code path.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We need to split the parsing functions into one function dedicated to
the actual parsing and a second function for initializing the interrupt
type. This will be useful on the restore path as the parsing won't be
needed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding support for snapshot and restore to the MsiConfig structure, as
it will be needed part of VFIO migration.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This carries a string that is exposed via DMI/SMBIOS and is particularly
useful for cloud-init initialisation.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This is particularly helpful as the cloud-init DMI serial number
encoding scheme uses "=" and ";" for key value pairs.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If the guest has not activated the virtio-mem device then reject an
attempt to resize using it.
Fixes: #4001
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Live upgrade is currently not guaranteed during this development cycle
and we will try to enable these tests after the next release.
Signed-off-by: Bo Chen <chen.bo@intel.com>
By augmenting existing set of tests, this patch added a set of
tests for live-upgrade that covers use cases with NUMA,
vhost-user (OVS-DPDK), and local-migration.
Fixes: #3949
Signed-off-by: Bo Chen <chen.bo@intel.com>
Use a single enum member for representing errors from the internal API.
This avoids the ugly duplication of the API call name in the error
message:
e.g.
$ target/debug/ch-remote --api-socket /tmp/api resize --cpus 2
Error running command: Server responded with an error: InternalServerError: VmResize(VmResize(CpuManager(DesiredVCpuCountExceedsMax)))
Becomes:
$ target/debug/ch-remote --api-socket /tmp/api resize --cpus 2
Error running command: Server responded with an error: InternalServerError: ApiError(VmResize(CpuManager(DesiredVCpuCountExceedsMax)))
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In case a list of resources is provided to allocate_bars(), it directly
means we're restoring some existing BARs. That's why we shouldn't share
the codepath that creates BARs from scratch as we don't need to interact
with the device to retrieve the information.
Whenever resources are provided, we simply iterate over the list of
possible BAR indexes and create the BARs if the resource could be found.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of defining some very generic resources as PioAddressRange or
MmioAddressRange for each PCI BAR, let's move to the new Resource type
PciBar in order to make things clearer. This allows the code for being
more readable, but also removes the need for hard assumptions about the
MMIO and PIO ranges. PioAddressRange and MmioAddressRange types can be
used to describe everything except PCI BARs. BARs are very special as
they can be relocated and have special information we want to carry
along with them.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to make the code more consistent and easier to read, we remove
the former tuple that was used to describe a BAR, replacing it with the
existing structure PciBarConfiguration.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The code was quite unclear regarding the type of index that was being
used regarding a BAR. This is improved by differenciating register
indexes and BAR indexes more clearly.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By factorizing the algorithm untangling TDVF sections from guest RAM
into a dedicated function, we can write some unit tests to validate it
properly achieves what we expect.
Adding the "tdx" feature to the unit tests, otherwise it wouldn't get
tested.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The I/O operations knobs are prefixed `ops_` rather than `bw_`, as `bw_`
refers to the "bandwidth" knobs.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
By adding a new method id() to the PciDevice trait, we allow the caller
to retrieve a unique identifier. This is used in the context of BAR
relocation to identify the device being relocated, so that we can update
the DeviceTree resources for all PCI devices (and not only
VirtioPciDevice).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Relying on the list of resources, VfioCommon is now able to allocate the
BARs at specific addresses. This will be useful for restoring VFIO and
vfio-user devices.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By returning the new PCI resources from add_pci_device(), we allow the
factorization of the code translating the BARs into resources. This
allows VIRTIO, VFIO and vfio-user to add the resources to the DeviceTree
node.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Relying on the function introduced recently to get the PCI resources and
handle the restore case, both VFIO and vfio-user device creation paths
now have access to PCI resources, which can be provided to the function
add_pci_device().
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Create a dedicated function for getting the PCI segment, b/d/f and
optional resources. This is meant for handling the potential case of a
restore.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Updating the way of restoring BAR addresses for virtio-pci by providing
a more generic approach that will be reused for other PciDevice
implementations (i.e VfioPcidevice and VfioUserPciDevice).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The calls to these functions are always preceded by a call to
InterruptSourceGroup::update(). By adding a masked boolean to that
function call it possible to remove 50% of the calls to the
KVM_SET_GSI_ROUTING ioctl as the the update will correctly handle the
masked or unmasked case.
This causes the ioctl to disappear from the perf report for a boot of
the VM.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It suffered from the same issue like the main program after switching to
Rust 2021 edition, but the issue was not caught by the CI.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
EDK2 execution requires a flash device at address 0.
The new added device is not a fully functional flash. It doesn't
implement any spec of a flash device. Instead, a piece of memory is used
to simulate the flash simply.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
We modified a test case to workaround the RAM calculation error caused
by hidding 4MiB memory for UEFI. Now change it back to normal.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Size of `memory` node in FDT was reduced by 4MiB. Now it is returned.
In memory regions, a `Ram` region of 4MiB was created at address 0. Now
it is removed.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Rust 2021 edition has a few improvements over the 2018 edition. Migrate
the project to 2021 edition by following recommended migration steps.
Luckily, the code itself doesn't require fixing.
Bump MSRV to 1.56 as it is required by the 2021 edition. Also fix the
clap build dependency to make Cloud Hypervisor build again.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
This is a refactoring commit to simplify source code.
Removed some functions that only return a layout const.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Some addresses defined in `layout.rs` were of type `GuestAddress`, and
are `u64`. Now align the types of all the `*_START` definitions to
`GuestAddress`.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Now that address translations performed by virtio-iommu can error out if
the address can't be translated, we uncovered an issue in integration
test aarch64_acpi::test_virtio_iommu.
We disable the test until we can investigate and fix the root cause.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
It doesn't matter if we're trying to translate a GVA or a GPA address,
but in both cases we must error out if the address couldn't be
translated.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Remove EOLed distributions and clarify the stability guarantees and what
the experimental features are.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The reserved space is for devices.
Some devices (like TPM) require arbitrary addresses close to 4GiB.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
`RAM_64BIT_START` was set to 1 GiB, not a real 64-bit address. Now
rename it `RAM_START` to avoid confusion.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
The extra vDPA device in the test is hotplugged behind the vIOMMU, which
covers the use case of placing a vDPA device behind a virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Whenever a virtio device is placed behind a vIOMMU, we have some code in
pci_common_config.rs to translate the queue addresses (descriptor table,
available ring and used ring) from GVA to GPA, so that they can be used
correctly.
But in case of vDPA, we also need to provide the queue addresses to the
vhost backend. And since the vhost backend deals with consistent IOVAs,
all addresses being provided should be GVAs if the device is placed
being a vIOMMU. For that reason, we perform a translation of the queue
addresses back from GPA to GVA if necessary, and only to be provided to
the vhost backend.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Add a new iommu parameter to VdpaConfig in order to place the vDPA
device behind a virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In case an external mapping would have been added after the virtio-iommu
device has been activated, it would have simply be ignored because the
code wasn't using a shared object between the vmm thread and the iommu
thread. This behavior is only triggered on the hotplug codepath, and
only if the hotplugged device is placed behind the virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for the vDPA need to translate a GPA back into a GVA, we
extend the existing trait DmaRemapping and AccessPlatform to perform
such operation.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Renaming translate() to translate_gva() to clarify we want to translate
a GVA address into a GPA.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
According to latest official images based on latest TDX guest kernel, we
update the documentation to reflect the change regarding serial support.
New guest kernels have been updated to disable usage of serial ports,
meaning adding console=ttyS0 to the kernel boot parameters will have no
effect.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The list of memory resources provided through the HOB wasn't accurate
because of the broken logic. The fix provides correct ranges to the
firmware.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on latest QEMU patches from branch tdx-qemu-2022.03.29-v7.0.0-rc1
we should only report as memory resources the TempMem sections from TDVF
sections.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on latest QEMU patches from branch tdx-qemu-2022.03.29-v7.0.0-rc1
we don't need EFI_RESOURCE_ATTRIBUTE_ENCRYPTED as part of the attributes
we must enable with EFI_RESOURCE_SYSTEM_MEMORY and
EFI_RESOURCE_MEMORY_RESERVED resource types.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The introduction of a error if live resizing is not possible is a
regression compared to the original behaviour where the new size would
be stored in the config and reflected in the next boot. This behaviour
was also inconsistent with the effect of resizing with no VM booted.
Instead of generating an error allow the code to go ahead and update the
config so that the new size will be available upon the reboot.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
As reported by the periodic CI runs, it may take more time for the NVMe
device to present in the guest after being hotplugged as a VFIO user
device on `aarch64` (especially under high load). Let's increase the
timeout after device hotplug from `1s` to `10s` to increase the test
stability.
Fixes: #3495
Signed-off-by: Bo Chen <chen.bo@intel.com>
Similarly to the previous commit restricting the cpu resizing error only
to the situations where the vcpu amount has changed, let's do the same
with the memory and be consistent throughout our code base.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
188078467d made clear that resize should
only happen when dealing with a "dynamic" CpuManager. Although this is
very much correct, it causes a regression on Kata Containers (and on any
other consumer of Cloud Hypervisor) in cases where a resize would be
triggered but the vCPUs values wouldn't be changed.
There's no doubt Kata Containers could do better and do not call a
resize in such situations, and that's something that should **also** be
solved there. However, we should also work this around on Cloud
Hypervisor side as it introduces a regression with the current Kata
Containers code.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
Extend the Hypervisor API in order to retrieve the TDX capabilities from
the underlying hypervisor.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By enabling the VIRTIO feature VIRTIO_F_IOMMU_PLATFORM for all
vhost-user devices when needed, we force the guest to use the DMA API,
making these devices compatible with TDX. By using DMA API, the guest
triggers the TDX codepath to share some of the guest memory, in
particular the virtqueues and associated buffers so that the VMM and
vhost-user backends/processes can access this memory.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If EFI reset fails on the Linux kernel then it will fallthrough to CMOS
reset. Implement this as one of our reset solutions.
Fixes: #3912
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Compile this feature in by default as it's well supported on both
aarch64 and x86_64 and we only officially support using it (no non-acpi
binaries are available.)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
These were erroneously skipping features for the unit tests and the
"build" target for dev_cli.sh
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
These are never run by the CI and is inconsistent with the way we build
test which is specified inside the .github workflows.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This includes the removal of testing without the "acpi" feature. The
command have been reordered to reduce the amount of recompilation
required.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It seems the vdpa_sim_block isn't behaving properly after the vhost
device is closed, as it sometimes returns EBUSY when we try to open it
again. The easiest way to deal with this issue is by simplifying the
integration test, avoid to plug the same device after it's been
unplugged.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit unifies the custom linux kernel build in x86, Arm, and
performance metrics to the same function. Therefore, when bumping
the kernel version, we can make sure we only need to make the change
in one place.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
With the addition of the amx feature, add a new build workflow to
enable the feature and a clippy quality check.
Signed-off-by: William Douglas <william.douglas@intel.com>
AMX is an x86 extension adding hardware units for matrix
operations (int and float dot products). The goal of the extension is
to provide performance enhancements for these common operations.
On Linux, AMX requires requesting the permission from the kernel prior
to use. Guests wanting to make use of the feature need to have the
request made prior to starting the vm.
This change then adds the first --cpus features option amx that when
passed will enable AMX usage for guests (needs a 5.17+ kernel) or
exits with failure.
The activation is done in the CpuManager of the VMM thread as it
allows migration and snapshot/restore to work fairly painlessly for
AMX enabled workloads.
Signed-off-by: William Douglas <william.douglas@intel.com>
Now that we rely on vhost v0.4.0, which contains the fix for
get_iova_range(), we don't need the workaround anymore, and we can
actually call into the dedicated function.
Fixes#3861
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Rely on newly released versions of the vhost and vhost-user-backend
crates from rust-vmm.
The new vhost version includes the fixes needed for vDPA.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit makes sure that the custom linux kernel is always
rebuilt when running the performance metrics tests, and therefore
changes to the kernel config file is always caught.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Explain the reason why using vDPA might be interesting and how to use it
with Cloud Hypervisor.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Disable the DAX feature from the virtio-fs implementation as the feature
is still not stable. The feature is deprecated, meaning the 'dax'
parameter will be removed in about 2 releases cycles.
In the meantime, the parameter value is ignored and forced to be
disabled.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The test is sporadically failing whenever we try to hotplug the vDPA
device we've just unplugged. This is causing the kernel to complain with
EBUSY because the device hasn't been released yet. This is happening
because the CI system is under very high load, therefore taking quite
some time to the host to update the state of this device.
The easy way to fix such issue is by increasing the sleep time between
the unplug and the replug.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When running non-dynamic or with virtio-mem for hotplug the ACPI
functionality should not be included on the DSDT nor does the
MemoryManager need to be placed on the MMIO bus.
Fixes: #3883
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This is now consistent with not supplying the _CRS for the device when
CpuManager is not dynamic.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The file descriptor provided to fs_slave_map() and fs_slave_io() is
passed as a AsRawFd trait, meaning the caller owns it. For that reason,
there's no need for these functions to close the file descriptor as it
will be closed later on anyway.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
As ethr is not stable on AArch64, disable it until we find other tool.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
fio test depends on hot-add disk which needs uefi on AArch64, that
will lead to lots of performance issues. So, it's better to use
cold-plug disk.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
On Arm64, the fio binary that comes from ubuntu distribution cannot
support io_uring, which is a required engine for the block
performance tests in performance metrics. Therefore this commit
build the fio from a relatively new version, and replace the native
ubuntu fio with the newly build one.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
To emulate debug I/O port on arm64, we need trap from guest to VMM.
Generally, there are 3 ways to go:
1) execute a privilege intruction like "wfi";
2) access a system register;
3) access device MMIO region;
However, 1) and 2) often handled in kvm, thus 3) it's the choice.
There maybe lots of repeated work and enlarge the size of clh to develop
a new device, so it's better to reuse the current device. Luckily, I
find that pl011 is the eariest device initialized in kernel and, there
is reserved region in it which we can reuse for emulating debug I/O.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Rather than just printing a message return an error back through the API
if the user attempts to hotplug a device that supports being behind an
IOMMU where that device isn't placed on an IOMMU segment.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Ensure devices that are specified to be on a PCI segment that is behind
the IOMMU are IOMMU enabled if possible or error out for those devices
that do not support it.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Previously it was not possible to enable vIOMMU for a virtio device.
However with the ability to place an entire PCI segment behind the
IOMMU the IOMMU mapping needs to be setup for the virtio device if it is
behind the IOMMU.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This can already be calculated by the summing the tables reported by the
Linux kernel but this is more convenient.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Changes in commit "scripts: aarch64: Reduce source code build in CI"
for the Linux kernel will lead to the kernel cannot be rebuilt if
the config file is changed. Therefore should be reverted.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
As Linux kernel, edk2, virtiofd, SPDK are all build from source, we
need to find a way to reduce the number of source code build.
To address this issue, this commit adds a stage that touching a
".built" file to each repo of the source code after a successfully
build. By checking if the ".built" file exists, we can determine
if there is already an old build. Since the source code repo will
be removed and cloned again when we bump the repo hash, the CI will
rebuild the repo.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Whenever a vfio-user device is dropped, the communication between the
VMM and the backend should be shutdown.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Separate the destruction and cleanup of original VM and the creation of
the new one. In particular have a clear hand off point for resources
(e.g. reset EventFd) used by the new VM from the original. In the
situation where vm.shutdown() generates an error this also avoids the
Vmm reference to the Vm (self.vm) from being maintained.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding two new integration tests for vDPA, relying on both block and net
simulators from the host kernel.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the newly added Vdpa device along with the new vdpa parameter,
this patch enables the support for vDPA devices.
It's important to note this the only virtio device for which we provide
an ExternalDmaMapping instance. This will allow for the right DMA ranges
to be mapped/unmapped.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Introduce a new --vdpa parameter associated with a VdpaConfig for the
future creation of a Vdpa device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
vDPA is a kernel framework introduced fairly recently in order to handle
devices complying with virtio specification on their datapath, while the
control path is vendor specific. For the datapath, that means the
virtqueues are handled through DMA directly between the hardware and the
guest, while the control path goes through the vDPA framework,
eventually exposed through a vhost-vdpa device.
vDPA, like VFIO, aims at achieving baremetal performance for devices
that are passed into a VM. But unlike VFIO, it provides a simpler/better
framework for achieving migration. Because the DMA accesses between the
device and the guest are going through virtio queues, migration can be
achieved way more easily, and doesn't require each device driver to
implement the migration support. In the VFIO case, each vendor is
expected to provide an implementation of the VFIO migration framework,
which makes things harder as it must be done for each and every device.
So to summarize the point is to support migration for hardware devices
through which we can achieve baremetal performances.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Update the content of the documentation to clarify how the cache option
from virtiofsd has an impact on the host page cache, while the dax
option for the filesystem in the guest has an impact on the guest page
cache.
The document is also updated to not have lines exceeding 80 characters.
Fixes#3826
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Document the reason why someone might need to use the balloon device and
detail the different parameters associated with it.
Fixes#3807
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This will significantly reduce the size of the DSDT and the effort
required to parse them if there is no requirement to support
hotplug/unplug.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If the CpuManager is dynamic it devices CPUs can be
hotplugged/unplugged.
Since TDX does not support CPU hotplug this is currently the only
determinator as to whether the CpuManager is dynamic.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Since the code has been adapted to support VIRTIO_F_EVENT_IDX we use
Queue::needs_notification() to determine whether to signal the guest so
it is no longer necessary to check if there are any used descriptors. If
the feature is not negotiated then Queue::needs_notification() will
return true triggering an interrupt of the guest. Theoretically this
could be a spurious interrupt of the guest if there were no used used
descriptors but this is unlikely as we only generate used descriptors
for the control queue as a result of an interrupt of the VMM by the
guest.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This indicates if anything has been added to the available queue since
it was last iterated through. If it returns true then it is necessary to
iterate through the queue again otherwise it is appropriate to break out
from the loop.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
vmm.ping/vm.info will hang for PUT method, vm.create/vmm.shutdonw hang for GET method.
Because these four APIs do not write the response body when the HTTP method does not match.
Signed-off-by: LiHui <andrewli@kubesphere.io>
In case the virtio device which requires DMA mapping is placed behind a
virtual IOMMU, we shouldn't map/unmap any region manually. Instead, we
provide the DMA handler to the virtio-iommu device so that it can
trigger the proper mappings.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If a virtio device is associated with a DMA handler, the DMA mapping and
unmapping is performed from the device manager through the handler.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Given that some virtio device might need some DMA handling, we provide a
way to store this through the VirtioPciDevice layer, so that it can be
accessed when the PCI device is removed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for handling potential DMA mapping/unmapping operations for a
virtio device, we extend the MetaVirtioDevice with an additional field
that holds an optional DMA handler.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The tuple of information related to each virtio device is too big, and
it's better to factorize it through a dedicated structure.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
With the VIRTIO_F_EVENT_IDX handling now conducted inside the
virtio-queue crate it is necessary to activate the functionality on
every queue if it is negotiatated. Otherwise this leads to a failure of
the guest to signal to the host that there is something in the available
queue as the queue's internal state has not been configured correctly.
Fixes: #3829
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When mask a msi irq, we set the entry.masked to be true, so kvm
hypervisor will not pass the gsi to kernel through KVM_SET_GSI_ROUTING
ioctl which update kvm->irq_routing. This will trigger kernel
panic on AMD platform when the gsi is the largest one in kernel
kvm->irqfds.items:
crash> bt
PID: 22218 TASK: ffff951a6ad74980 CPU: 73 COMMAND: "vcpu8"
#0 [ffffb1ba6707fa40] machine_kexec at ffffffff8565b397
#1 [ffffb1ba6707fa90] __crash_kexec at ffffffff85788a6d
#2 [ffffb1ba6707fb58] crash_kexec at ffffffff8578995d
#3 [ffffb1ba6707fb70] oops_end at ffffffff85623c0d
#4 [ffffb1ba6707fb90] no_context at ffffffff856692c9
#5 [ffffb1ba6707fbf8] exc_page_fault at ffffffff85f95b51
#6 [ffffb1ba6707fc50] asm_exc_page_fault at ffffffff86000ace
[exception RIP: svm_update_pi_irte+227]
RIP: ffffffffc0761b53 RSP: ffffb1ba6707fd08 RFLAGS: 00010086
RAX: ffffb1ba6707fd78 RBX: ffffb1ba66d91000 RCX: 0000000000000001
RDX: 00003c803f63f1c0 RSI: 000000000000019a RDI: ffffb1ba66db2ab8
RBP: 000000000000019a R8: 0000000000000040 R9: ffff94ca41b82200
R10: ffffffffffffffcf R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffffffffffcf R15: 000000000000005f
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ffffb1ba6707fdb8] kvm_irq_routing_update at ffffffffc09f19a1 [kvm]
#8 [ffffb1ba6707fde0] kvm_set_irq_routing at ffffffffc09f2133 [kvm]
#9 [ffffb1ba6707fe18] kvm_vm_ioctl at ffffffffc09ef544 [kvm]
RIP: 00007f143c36488b RSP: 00007f143a4e04b8 RFLAGS: 00000246
RAX: ffffffffffffffda RBX: 00007f05780041d0 RCX: 00007f143c36488b
RDX: 00007f05780041d0 RSI: 000000004008ae6a RDI: 0000000000000020
RBP: 00000000000004e8 R8: 0000000000000008 R9: 00007f05780041e0
R10: 00007f0578004560 R11: 0000000000000246 R12: 00000000000004e0
R13: 000000000000001a R14: 00007f1424001c60 R15: 00007f0578003bc0
ORIG_RAX: 0000000000000010 CS: 0033 SS: 002b
To solve this problem, move route.disable() before set_gsi_routes() to
remove the gsi from irqfds.items first.
This problem only exists on AMD platform, 'cause on Intel platform
kernel just return when update irte while it only prints a warning on
AMD.
Also, this patch adjusts the order of enable() and set_gsi_routes() in
unmask(), which should do no harm.
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
When mask a msi irq, we set the entry.masked to be true, so kvm
hypervisor will not pass the gsi to kernel through KVM_SET_GSI_ROUTING
ioctl which update kvm->irq_routing. This will trigger kernel
panic on AMD platform when the gsi is the largest one in kernel
kvm->irqfds.items:
crash> bt
PID: 22218 TASK: ffff951a6ad74980 CPU: 73 COMMAND: "vcpu8"
#0 [ffffb1ba6707fa40] machine_kexec at ffffffff8565b397
#1 [ffffb1ba6707fa90] __crash_kexec at ffffffff85788a6d
#2 [ffffb1ba6707fb58] crash_kexec at ffffffff8578995d
#3 [ffffb1ba6707fb70] oops_end at ffffffff85623c0d
#4 [ffffb1ba6707fb90] no_context at ffffffff856692c9
#5 [ffffb1ba6707fbf8] exc_page_fault at ffffffff85f95b51
#6 [ffffb1ba6707fc50] asm_exc_page_fault at ffffffff86000ace
[exception RIP: svm_update_pi_irte+227]
RIP: ffffffffc0761b53 RSP: ffffb1ba6707fd08 RFLAGS: 00010086
RAX: ffffb1ba6707fd78 RBX: ffffb1ba66d91000 RCX: 0000000000000001
RDX: 00003c803f63f1c0 RSI: 000000000000019a RDI: ffffb1ba66db2ab8
RBP: 000000000000019a R8: 0000000000000040 R9: ffff94ca41b82200
R10: ffffffffffffffcf R11: 0000000000000001 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffffffffffcf R15: 000000000000005f
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ffffb1ba6707fdb8] kvm_irq_routing_update at ffffffffc09f19a1 [kvm]
#8 [ffffb1ba6707fde0] kvm_set_irq_routing at ffffffffc09f2133 [kvm]
#9 [ffffb1ba6707fe18] kvm_vm_ioctl at ffffffffc09ef544 [kvm]
RIP: 00007f143c36488b RSP: 00007f143a4e04b8 RFLAGS: 00000246
RAX: ffffffffffffffda RBX: 00007f05780041d0 RCX: 00007f143c36488b
RDX: 00007f05780041d0 RSI: 000000004008ae6a RDI: 0000000000000020
RBP: 00000000000004e8 R8: 0000000000000008 R9: 00007f05780041e0
R10: 00007f0578004560 R11: 0000000000000246 R12: 00000000000004e0
R13: 000000000000001a R14: 00007f1424001c60 R15: 00007f0578003bc0
ORIG_RAX: 0000000000000010 CS: 0033 SS: 002b
To solve this problem, move route.disable() before set_gsi_routes() to
remove the gsi from irqfds.items first.
This problem only exists on AMD platform, 'cause on Intel platform
kernel just return when update irte while it only prints a warning on
AMD.
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Reduce the number of open pull requests dependabot will create to avoid
excessive rebase and rebuilds of PRs. This avoids a situation with a 2nd
PR being rebased after a 1st is merged resulting in a wasteful rebuild.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Move to release version v0.2.0 for both vm-virtio and vhost-user-backend
crates rather than relying on their main branch, as they might be
subject to breaking changes.
Fixes#3800
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Replace the thread for handling SIGSYS with a simple signal handler.
This resolves inconsistent delivery of signals to the SIGSYS thread due
to other threads manipulating the signals.
Tested by removing key syscalls from vCPU and virtio device filters and
observing correct notice.
Fixes: #3811
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
To be consistently with the integration scripts, we now pass through the
`--test-filter` option of the test scripts to the `performance-metrics`
binary. Now the following two commands achieve the same results:
`$./scripts/dev_cli.sh tests --metrics -- --test-filter boot_time_ -- --test-filter latency`
`$./scripts/dev_cli.sh tests --metrics -- -- --test-filter boot_time_ --test-filter latency`
Note that, the test scripts support only single occurrence of the
`--test-filter` option while the `performance-metrics` binary allows
multiple occurrences for filtering based on different keywords.
Fixes: #3787
Signed-off-by: Bo Chen <chen.bo@intel.com>
Add a field for its length and fix up users.
Things work just because all hardcoded values agree with each other.
This is prone to breakage.
No functional change.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Needed since:
commit 0ab4097606
Author: Bo Chen <chen.bo@intel.com>
Date: Thu Feb 10 18:29:53 2022 -0800
test_infra: Enable cross-build for "musl" and "aarch64" targets
With enabling the `vendered-openssl` feature, we can now cross-build the
`test_infra` crate for "musl" and "aarch64" targets. In this way, we
can remove the `test_infra` crate from the "exclude" list, so that this
crate can be checked and processed by "cargo clippy" and "cargo fmt".
More details can be found: https://docs.rs/openssl/latest/openssl/#vendored
As 'musl-gcc' is required, this commit also installs the `musl-tools`
package for our "build" github action on the musl target [1].
[1] https://github.com/actions-rs/toolchain/issues/102
Signed-off-by: Bo Chen <chen.bo@intel.com>
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Some host kernels are IPv6-only, and they cannot make an AF_INET socket.
The tun ioctls such as SIOCGIFHWADDR work with an AF_UNIX socket, which
all host kernels should have.
Signed-off-by: Barret Rhoden <brho@google.com>
Adding the missing TARGET_CC environment variable to get the build to
complete correctly.
Fixes#3776
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
After writing to an address, Windows 11 on ARM64 unconditionally reads
it back. It is harmless. Drop the error message to avoid spamming.
Fixes: #3732
Signed-off-by: Wei Liu <liuwe@microsoft.com>
This looks like it was copy and pasted from the network test which
required 2 vCPUs per queue pair but has since been resolved.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Using the default queue sizes provides more realistic data about what
our users are testing. Extra metrics can be added later that also
modify the queue size but overloading the existing metrics is confusing.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Don't treat it as the number of pairs. Instead calculate the number of
pairs later when necessary.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Also be clear that the block tests are in bytes per second (Bps) vs
network that is in bits per second (bps).
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The former is ambiguous as it could be considered the ordinal (and is
used elsewhere in the codebase for that).
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Many of the tests already amortize their results over a longer time
period/sample so it is not necessary to run 30 iterations.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Let's officially have a way to pass the features used to build
cloud-hypervisor to the dev_cli.sh script.
This doesn't invalidate the previous commit, as we still don't what the
features_build variable to be quoted, otherwise we face the following
issue:
```
error: Found argument '--features tdx' which wasn't expected, or isn't valid in this context
Did you mean --features?
USAGE:
cargo build --all --features <FEATURES>...
```
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
2805e7b1dc quoted enclose variables to
prevent globbing or incorrect splitting. However, by doing with with
$features_build it broke the capability to call the script as:
```
$ ./scripts/dev_cli.sh build --release --libc musl -- --features tdx
```
Before 2805e7b1dc it simply worked, after,
the result is:
```
docker run --user 1000:1000 --workdir /cloud-hypervisor --rm --volume /dev/kvm --volume /home/ffidenci/go/src/github.com/cloud-hypervisor/cloud-hypervisor:/cloud-hypervisor --env RUSTFLAGS= cloudhypervisor/dev:20220223-0 cargo build --all '' --target-dir /cloud-hypervisor/build/cargo_target --features tdx --release --target x86_64-unknown-linux-musl
error: Found argument '' which wasn't expected, or isn't valid in this context
USAGE:
cargo build --all
For more information try --help
```
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
For now only generate the boot time related tests as the full metrics
test suite needs some more time to bed in.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The dev container interface script (e.g. 'dev_cli.sh') now supports the
following arguments syntax for running tests:
`tests [--unit|--cargo|--all] [--libc musl|gnu] [-- [<test scripts args>] [-- [<test binary args>]]] `
In this way, we can pass custom arguments to the test binary (either
"cargo test" or "performance-metrics") with our dev container script.
For example:
`$ ./dev_cli.sh tests --metrics -- -- --report-file /tmp/metrics.json --test-filter latency`
`$ ./dev_cli.sh tests --integration -- --test-filter "test_serial" -- --nocapture --test-threads=1`
Fixes: #3739
Signed-off-by: Bo Chen <chen.bo@intel.com>
We don't need to install docker inside the container. Add missing
depenencies that docker was pulling in.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The same way we mask the writes coming from the guest to the message
control register related to MSI-X capability, let's do the same for MSI.
The point is to prevent the guest from writing to read-only bits.
The correct writable bits for MSI are only bits 0, 4, 5 and 6 of 2nd
16-bit word.
Those are:
* MSI Enable: 0
* Multiple Message Enable: 6-4
See "Table 7-39 Message Control Register for MSI" from
"NCB-PCI_Express_Base_5.0r1.0-2019-05-22.pdf".
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Starting from Rust 1.56 Cargo supports specifying the minimum supported
rust version (MSRV) via "rust-version". If the compiler version is not
satisfied, Cargo prints an error and exits early.
MSRV is useful information to packagers. Using this field also saves us
from adding another file to the tree.
The version is currently set to 1.54, which is tested to build Cloud
Hypervisor successfully. Although anyone who uses 1.54 will see a
warning because "rust-version" is only introduced in 1.56. The warning
can be safely ignored.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit adds event fds and the event handler to send/receive
requests and responses from the GDB thread. It also adds `--gdb` flag to
enable GDB stub feature.
Signed-off-by: Akira Moroo <retrage01@gmail.com>
This commit adds `stop_on_boot` to `Vm` so that the VM stops before
starting on boot requested. This change is required to keep the target
VM stopped before a debugger attached as the user expected.
Signed-off-by: Akira Moroo <retrage01@gmail.com>
This commit adds `Vm::debug_request` to handle `GdbRequestPayload`,
which will be sent from the GDB thread.
Signed-off-by: Akira Moroo <retrage01@gmail.com>
This commit adds initial gdb.rs implementation for `Debuggable` trait to
describe a debuggable component. Some part of the trait bound
implementations is based on the crosvm GDB stub code [1].
[1] https://github.com/google/crosvm/blob/main/src/gdb.rs
Signed-off-by: Akira Moroo <retrage01@gmail.com>
This commit adds `KVM_SET_GUEST_DEBUG` and `KVM_TRANSLATE` ioctls to
seccomp filter to enable guest debugging without `--seccomp=false`.
Signed-off-by: Akira Moroo <retrage01@gmail.com>
This commit adds `VmState::BreakPoint` to handle hardware breakpoint.
The VM will enter this state when a breakpoint hits or a debugger
interrupts the execution.
Signed-off-by: Akira Moroo <retrage01@gmail.com>
This commit adds `VmExit::Debug` for x86/KVM. When the guest hits a
hardware breakpoint, `VcpuExit::Debug` vm exit occurs. This vm exit
will be handled with code implemented in the following commits.
Signed-off-by: Akira Moroo <retrage01@gmail.com>
This commit adds `translate_gva` for x86/KVM. The same name function is
already implemented for MSHV, but the implementation differs as
KVM_TRANSLATE does not take the flag argument and does not return status
code. This change requires the newer version of kvm-ioctls [1].
[1]
97ff779b6e
Signed-off-by: Akira Moroo <retrage01@gmail.com>
`translate_gva` returns mshv-specific type `hv_translate_gva_result`.
This return type is not a problem since this function is implemented
only for mshv, but we need to remove the type as the same function will
be implemented for KVM in PR #3575. This commit replaces the
mshv-specific type with `u32`.
Signed-off-by: Akira Moroo <retrage01@gmail.com>
error: writing `&mut Vec` instead of `&mut [_]` involves a new object
where a slice will do
--> virtio-devices/src/transport/pci_common_config.rs:93:17
|
93 | queues: &mut
Vec<Queue<GuestMemoryAtomic<GuestMemoryMmap>>>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
help: change this to: `&mut [Queue<GuestMemoryAtomic<GuestMemoryMmap>>]`
|
= note: `-D clippy::ptr-arg` implied by `-D warnings`
= help: for further information visit
https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
Signed-off-by: Akira Moroo <retrage01@gmail.com>
I incorrectly used the MSI message control register values for the mask
not the the MSI-X control registers.
The correct writable fields for MSI-X are only bits 14 and 15 of 2nd
16-bit word.
Those are:
* Function Mask: 14
* MSI-X Enable: 15
See "Table 7-47 Message Control Register for MSI-X" from
"NCB-PCI_Express_Base_5.0r1.0-2019-05-22.pdf"
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
42b5d4a2f7 has changed how the PciBdf
field of a DeviceNode is represented (from an int32 to its own struct).
To avoid marshelling / demarshelling issues for the projects relying on
the openapi auto generated code, let's propagate the change, updating
the yaml file accordingly.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
`Dies per package` setting of VCPU topology doesnot apply on AArch64.
Now we only accept `1` value. This way we can make the `dies` field
transparent, avoid it from impacting the topology setting.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
The logic of determining VCPU index in creating `cpu-map` node of FDT
can be optimized.
The code is invoked when VCPU topology is specified.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
In Flattened Device Tree (FDT) on AArch64, the VCPU topology is
represented by `cpu-map` node. The source code of creating the node
can be simplified.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
If `--local` is provided or if the version is not available then build
the container before use. This allows combining updates to the
Dockerfile with a full CI run.
Drop the "--dev" parameter as we only support one container type for
simplicity.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
For vhost-user devices, we don't want to loose the vhost-user protocol
feature through the negotiation between guest and device. Since we know
VIRTIO has no knowledge of the vhost-user protocol feature, there is no
way it would ever be acknowledged by the guest. For that reason, we
create each vhost-user device with the set of acked features containing
the vhost-user protocol feature is this one was part of the available
list.
Having the set of acked features containing this bit allows for solving
a bug that was happening through the migration process since the
vhost-user protocol feature wasn't explicitely enabled.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In this way, we can cover local-migration with dpdk in our regular CI,
to prevent similar regressions reported and fixed by #3657.
Fixes: #3659
Signed-off-by: Bo Chen <chen.bo@intel.com>
Based on the helpers from the hypervisor crate, the VMM can identify
what type of hypercall has been issued through the KVM_EXIT_TDX reason.
For now, we only log warnings and set the status to INVALID_OPERAND
since these hypercalls aren't supported. The proper handling will be
implemented later.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Relying on the recent additions to the kvm-ioctls crate, this commit
implements the support for providing the exit reason details to the
caller, which allows the identification of the type of hypercall that
was issued. It also introduces a way for the consumer to set the status
code that must be sent back to the guest.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since the object returned from CpuManager.create_vcpu() is never used,
we can avoid the cloning of this object.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Rely on latest version of rust-vmm/kvm-ioctls to be able to invoke the
new method get_kvm_run() that returns a mutable reference of the kvm_run
structure.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
A new fork of the kvm-bindings crate has been submitted to the
ch-v0.5.0-tdx branch. It contains updated bindings for x86 to support
TDX.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This will allow easier transitioning between versions of the container.
A later PR will update the CI to use this new tag.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This reverts commit 98bbfa9738.
Some tests are continuing to fail even after reverting
d27316dab6. This is the only other
relevant change.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This reverts commit d27316dab6.
Jenkins testing showed up issues that didn't appear during manual
testing even after using "dev_cli.sh build-container" before running
integration tests.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Remove unused packages or more specific dependencies. In particular use
the packaged virtiofsd to avoid compiling it.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
To run unit tests correctly on musl target, We don't need to provide
specific "CFLAGS" or "TARGET_CC", as long as we use the correct build
target `*-linux-musl` with the "cargo test" command.
Signed-off-by: Bo Chen <chen.bo@intel.com>
It provides a CLI optoin to list and filter tests, e.g.:
`$ performance-metrics --test-filter boot_time --test-filter net_latency`
Signed-off-by: Bo Chen <chen.bo@intel.com>
Performance tests are expected to be executed sequentially, so we can
start VM guests with the same IP while putting them on a different
private network. The default constructor "Guest::new()" does not work
well, as we can easily create more than 256 VMs from repeating various
performance tests dozens times in a single run.
Signed-off-by: Bo Chen <chen.bo@intel.com>
In this way, we can avoid create/delete large temporary files during
every iteration of block I/O performance tests. Also, we can reuse the
'init/clean_tests()' interface in the future for other setup/cleanup.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit adds unit tests for parsing iperf3/ethr/boot_time/fio, e.g.:
`$ cargo test --package performance_metrics `
Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit creates a new binary target for generating performance metrics,
and also adds a set of performance tests for network throughput/latency,
block I/O performance, and boot time.
Signed-off-by: Bo Chen <chen.bo@intel.com>
error: unused variable: `fw_path`
--> test_infra/src/lib.rs:837:9
|
837 | fw_path: &str,
| ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_fw_path`
|
= note: `-D unused-variables` implied by `-D warnings`
Signed-off-by: Bo Chen <chen.bo@intel.com>
With enabling the `vendered-openssl` feature, we can now cross-build the
`test_infra` crate for "musl" and "aarch64" targets. In this way, we
can remove the `test_infra` crate from the "exclude" list, so that this
crate can be checked and processed by "cargo clippy" and "cargo fmt".
More details can be found: https://docs.rs/openssl/latest/openssl/#vendored
As 'musl-gcc' is required, this commit also installs the `musl-tools`
package for our "build" github action on the musl target [1].
[1] https://github.com/actions-rs/toolchain/issues/102
Signed-off-by: Bo Chen <chen.bo@intel.com>
keep it as default to print out commandline when spawning guest in favor
of integration tests for debugging purpose, while allowing to disable
it when needed (e.g. for performance tests).
Signed-off-by: Bo Chen <chen.bo@intel.com>
The PCI spec specifies that only the following bits are writable:
16: MSI Enable
20,21,22: Multiple Message Enable
26: Extended Message Data Enable
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
By having the DeviceNode storing a PciBdf, we simplify the internal code
as well as allow for custom Serialize/Deserialize implementation for the
PciBdf structure. These custom implementations let us display the PCI
s/b/d/f in a human readable format.
Fixes#3711
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
As we've added support for cold adding devices to a VM that was created
but not already started, we should propagate the `204` response
generated on those cases to the yaml file, so openapi-generator can
produce the correct client code on the go side, to handle both `200` and
`204` successful results.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
Instead of erroring out when trying to change the configuration of the
VM somewhere between the VM was created but not yet booted, let's allow
users to change that without any issue, as long as the VM has already
been created.
Fixes: #3639
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
Let's add very basic unit for the vm_add_$device() functions, so we can
easily expand those when changing its behaviour in the coming commits.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
Instead of doing the validation of the configuration change as part of
the vm, let's do this in the uper layer, in the Vmm.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
Let's move add_to_config to config.rs so it can be used from both inside
and outside of the vm.rs file.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
The GitHub security reporting link only works for those who are
repository owners.
Fixes: #3701
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
TDx support is already present on the project for quite some time, but
the TDx configuration was not yet exposed to the ones using CH via the
OpenAPI auto generated code.
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
Since the devices behind the IOMMU cannot be changed at runtime we offer
the ability to place all devices on user chosen segments behind the
IOMMU. This allows the hotplugging of devices behind the IOMMU provided
that they are assigned to a segment that is located behind the iommu.
Fixes: #911
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Introducing a new integration test relying on the virtio-balloon ability
to free host pages that have been reported as freed by the guest.
This test checks that after consuming a lot of RAM in the guest, the VMM
process is able to releases the pages reported by the guest. Simply done
by checking the RSS associated with the VMM's process follows the memory
trend in the guest.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Implement the VIRTIO_BALLOON_F_REPORTING feature, indicating to the
guest it can report set of free pages. A new virtqueue dedicated for
receiving the information about the free pages is created. The VMM
releases the memory by punching holes with fallocate() if the guest
memory is backed by a file, and madvise() the host about the ranges of
memory that shouldn't be needed anymore.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding a new parameter free_page_reporting=on|off to the balloon device
so that we can enable the corresponding feature from virtio-balloon.
Running a VM with a balloon device where this feature is enabled allows
the guest to report pages that are free from guest's perspective. This
information is used by the VMM to release the corresponding pages on the
host.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Improving the existing code for better readability and in anticipation
for adding an additional virtqueue for the free page reporting feature.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
No need to run the Jenkins CI on pull request for which exclusively
markdown files have been modified.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since AZURE_CONNECTION_STRING is only useful for the Windows build,
let's remove it from other builds where it's not invoked.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding a bit of documentation and links about the TDShim and how to run
it with Cloud Hypervisor.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This should not occur as ioeventfd is used for notification. Such an
error message would have made the discovery of the underlying cause of
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to allow for human readable output for the VM configuration, we
pull it out of the snapshot, which becomes effectively the list of
states from the VM. The configuration is stored through a dedicated file
in JSON format (not including any binary output).
Having the ability to read and modify the VM configuration manually
between the snapshot and restore phases makes debugging easier, as well
as empowers users for extending the use cases relying on the
snapshot/restore feature.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
As per this kernel documentation:
For KVM_EXIT_IO, KVM_EXIT_MMIO, KVM_EXIT_OSI, KVM_EXIT_PAPR, KVM_EXIT_XEN,
KVM_EXIT_EPR, KVM_EXIT_X86_RDMSR and KVM_EXIT_X86_WRMSR the corresponding
operations are complete (and guest state is consistent) only after userspace
has re-entered the kernel with KVM_RUN. The kernel side will first finish
incomplete operations and then check for pending signals.
The pending state of the operation is not preserved in state which is
visible to userspace, thus userspace should ensure that the operation is
completed before performing a live migration. Userspace can re-enter the
guest with an unmasked signal pending or with the immediate_exit field set
to complete pending operations without allowing any further instructions
to be executed.
Since we capture the state as part of the pause and override it as part
of the resume we must ensure the state is consistent otherwise we will
lose the results of the MMIO or PIO operation that caused the exit from
which we paused.
Fixes: #3658
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Remove the bits about this feature being experimental, as well as
limitations around virtio-mem and vhost-user devices.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The patch mechanism in Cargo.toml doesn't support features to be
specified, and was leading to the following warning:
warning: patch for `kvm-bindings` uses the features mechanism.
default-features and features will not take effect because the patch
dependency does not support this mechanism
Removing the "features" parameter from the patch fixes this warning
without breaking the build.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In this way, we allows to reuse the struct `Guest` with kernel paths and
kernel commands (e.g. hardcoded constants) that are tests-specific.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Instead of using hardcoded firmware paths inside the `Guest` struct
constructor, this commit removes `fw_path` related code paths from the
`Guest` struct and asks each test constructs its firmware path
explicitly. This allows better flexibility for the `Guest` struct so
that it can be reused for the performance tests we are adding soon.
Signed-off-by: Bo Chen <chen.bo@intel.com>
If a payload is found in the TDVF section, and after it's been copied to
the guest memory, make sure to create the corresponding TdPayload
structure and insert it through the HOB.
Signed-off-by: Jiaqi Gao <jiaqi.gao@intel.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding a new method to the TdHob structure so that we can easily insert
a HOB_PAYLOAD_INFO_TABLE into the HOB.
Signed-off-by: Jiaqi Gao <jiaqi.gao@intel.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In case of TDX, if a kernel and/or a command line are provided by the
user, they can't be treated the same way as for the non-TDX case. That
is why this patch ensures the function load_kernel() is only invoked for
the non-TDX case.
For the TDX case, whenever TDVF contains a Payload and/or PayloadParam
sections, the file provided through --kernel and the parameters provided
through --cmdline are copied at the locations specified by each TDVF
section.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the recent updates of the TDVF specification introducing new
types of TDVF sections, let's extend the enum in our code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The TDVF specification has been updated with the ability to provide a
specific payload, which means we will be able to achieve direct kernel
boot.
For that reason, let's not prevent the user from using --kernel
parameter when running with TDX.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Make sure Cloud Hypervisor relies on upstream and actively maintained
vfio-ioctls crate from the rust-vmm/vfio repository instead of the
deprecated version coming from rust-vmm/vfio-ioctls repository.
Fixes#3673
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that we introduced a separate method to indicate when the migration
is started, both start_dirty_log() and stop_dirty_log() don't have to
carry an implicit meaning as they can focus entirely on the dirty log
being started or stopped.
For that reason, we can now safely move stop_dirty_log() to the code
section performing non-local migration. It makes only sense to stop
logging dirty pages if this has been started before.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to clearly decouple when the migration is started compared to
when the dirty logging is started, we introduce a new method to the
Migratable trait. This clarifies the semantics as we don't end up using
start_dirty_log() for identifying when the migration has been started.
And similarly, we rely on the already existing complete_migration()
method to know when the migration has been ended.
A bug was reported when running a local migration with a vhost-user-net
device in server mode. The reason was because the migration_started
variable was never set to "true", since the start_dirty_log() function
was never invoked.
Signed-off-by: lizhaoxin1 <Lxiaoyouling@163.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since both vhost-user-block and vhost-user-net backend now rely on the
upstream vhost-user-backend crate from rust-vmm, we can simply remove
the local version of the crate from our repository.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of relying on the local version of vhost-user-backend, this
patch allows the block backend implementation to rely on the upstream
version of the crate from rust-vmm.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since virtio-iommu is now part of the upstream Linux kernel, the main
reason for having our own Linux kernel fork is to carry the patches for
virtio-watchdog support.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since we moved to the CloudHvX64 target from EDK2, we can't use the same
OVMF firmware for both Cloud Hypervisor and QEMU. The documentation
needed some updates.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of relying on the local version of vhost-user-backend, this
patch allows the block backend implementation to rely on the upstream
version of the crate from rust-vmm.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The Linux Foundation have recommended the use of the this license for
documentation so this change included the license in the documentation
directory.
The file "networking.md" was remove as the copyright holder did not give
their consent.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
While cloud-hypervisor does support receiving the file descriptors of a
tuntap device, advertising the fds structure via the openAPI can lead to
misinterpretations of what can and what should be done.
An unadvertised consumer will think that they could rather just set the
file descriptors there directly, or even pass them as a byte array.
However, the proper way to go in those cases would be actually sending
those via send_msg(), together with the request.
As hacking the openAPI auto-generated code to properly do this is not
*that* trivial, and as doing so during a `create VM` request is not
supported, we better not advertising those.
Please, for more details, also check:
https://github.com/cloud-hypervisor/cloud-hypervisor/pull/3607#issuecomment-1020935523
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
Now that all the preliminary work has been merged to make Cloud
Hypervisor work with the upstream crate virtio-queue from
rust-vmm/vm-virtio repository, we can move the whole codebase and remove
the local copy of the virtio-queue crate.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that multiple file descriptors can be provided along with add-net,
that means we can hotplug a multiqueue macvtap interface to the VM.
The common macvtap test is updated, meaning that both coldplug and
hotplug codepath now use multiqueue.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the latest code from the micro-http crate, this patch adds the
support for multiple file descriptors to be sent along with the add-net
request. This means we can now hotplug multiqueue network interface to
the VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This new trait simplifies the address translation of a GuestAddress by
having GuestAddress implementing it.
The three crates virtio-devices, block_util and net_util have been
updated accordingly to rely on this new trait, helping with code
readability and limiting the amount of duplicated code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Descriptor addresses are now translated from the virtio devices directly
and the definition of the AccessPlatform trait has been moved to
vm-virtio crate. For these reasons, the virtio-queue crate can be
simplified, which makes it very close to the upstream version.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Moving the whole codebase to rely on the AccessPlatform definition from
vm-virtio so that we can fully remove it from virtio-queue crate.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Moving away from the virtio-queue mechanism for descriptor address
translation. Instead, we enable the new mechanism added to every
VirtioDevice implementation, by setting the AccessPlatform trait if one
can be found.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since we're trying to move away from the translation happening in the
virtio-queue crate, the device itself is performing the address
translation when needed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since we're trying to move away from the translation happening in the
virtio-queue crate, the device itself is performing the address
translation when needed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since we're trying to move away from the translation happening in the
virtio-queue crate, the device itself is performing the address
translation when needed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since we're trying to move away from the translation happening in the
virtio-queue crate, the device itself is performing the address
translation when needed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since we're trying to move away from the translation happening in the
virtio-queue crate, the device itself is performing the address
translation when needed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since we're trying to move away from the translation happening in the
virtio-queue crate, the device itself is performing the address
translation when needed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Add a new method set_access_platform() to the VirtioDevice trait in
order to allow an AccessPlatform trait to be setup on any virtio device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that the virtio-devices crate can take care of the queue addresses
when placed behind a vIOMMU, we can remove the corresponding code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Upon the enablement of the queue by the guest, we perform a translation
of the descriptor table, the available ring and used ring addresses
prior to enabling the device itself. This only applies to the case where
the device is placed behind a vIOMMU, which is the reason why the
translation is needed. Indeed, the addresses allocated by the guest are
IOVAs which must be translated into GPAs before we can access the queue.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of relying on the virtio-queue crate to store the information
about the MSI-X vectors for each queue, we handle this directly from the
PCI transport layer.
This is the first step in getting closer to the upstream version of
virtio-queue so that we can eventually move fully to the upstream
version.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When freeing memory sometimes glibc will attempt to read
"/proc/sys/vm/overcommit_memory" to find out how it should release the
blocks. This happens sporadically with Cloud Hypervisor but has been
seen in use. It is not necessary to add the read() syscall to the list
as it is already included in the virtio devices common set. Similarly
the vCPU and vmm threads already have both these in the allowed list.
Fixes: #3609
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add integration tests for "pmu=on". It depends on checking if there
is "arm-pmu" item in "/proc/interrupts". As PMU info has not been added
to ACPI, the tests are only for dt.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
If a PMU is enabled in a VM, we also need to initialize the PMU
when the VM is restored. Otherwise, vCPUs cannot be started after
the VM is restored.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
When enable PMU on arm64, ioctl with group KVM_HAS_DEVICE_ATTR will be
blocked by seccomp, add it to authorized list.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Like devicefd, vcpufd also has ability to set/has attribute through kvm
ioctl. These traits are used when enable PMU on arm64, so add it here.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
As it might take more time for the VM to boot (especially under high
load) when using the firmware, let's increase the timeout waiting for
the VM to be reachable.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Relying on helpers for creating the ACPI tables and to add each table to
the HOB, this patch connects the dot to provide the set of ACPI tables
to the TD firmware.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding a new method to the TdHob structure so that we can easily insert
a ACPI_TABLE_HOB into the HOB.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The way to create ACPI tables for TDX is different as each table must be
passed through the HOB. This means the XSDT table is not required since
the firmware will take care of creating it. Same for RSDP, this is
firmware responsibility to provide it to the guest.
That's why this patch creates a TDX dedicated function, returning a list
of Sdt objects, which will let the calling code copy the content of each
table through the HOB.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In case of TDX, we don't want to create the ACPI tables the same way we
do for all the other use cases. That's because the ACPI tables don't
need to be written to guest memory at a specific address, instead they
are passed directly through the HOB.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
It's been decided the ACPI tables will be passed to the firmware in a
different way, rather than using TD_VMM_DATA. Since TD_VMM_DATA was
introduced for this purpose, there's no reason to keep it in our
codebase.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Both OVMF and RHF firmwares triggered an error when O_DIRECT was used
because they didn't align the buffers to the block sector size.
In order to prevent regressions, we're adding a new test validating the
VM can properly boot when the OS disk is opened with O_DIRECT and booted
from the rust-hypervisor-fw.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Whenever the backing file of our virtio-block device is opened with
O_DIRECT, there's a requirement about the buffer address and size to be
aligned to the sector size.
We know virtio-block requests are sector aligned in terms of size, but
we must still check if the buffer address is. In case it's not, we
create an intermediate buffer that will be passed through the system
call. In case of a write operation, the content of the non-aligned
buffer must be copied beforehand, and in case of a read operation, the
content of the aligned buffer must be copied to the non-aligned one
after the operation has been completed.
Fixes#3587
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This table is listed as required in the ARM Base Boot Requirements
document. The particular need arises to make the serial debugging of
Windows guest functional.
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
If the guest hasn't initialised a PV clock then the KVM_KVMCLOCK_CTRL
ioctl will return -EINVAL. Therefore if running in the firmware or an OS
that doesn't use the PV clock then we should ignore that error
Tested by migrating a VM that has not yet booted into the Linux kernel
(just in firmware) by specifying no disk image:
e.g. target/debug/cloud-hypervisor --kernel ~/workloads/hypervisor-fw --api-socket /tmp/api --serial tty --console off
Fixes: #3586
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
From 15358ef79d: Device Mapper Multipath
config can avoid systemd errors related to Device Mapper multipath while
guest booting.
From 46672c384c: CONFIG_NVME_MULTIPATH is
needed to fix the observed guest hanging issue cased by systemd crash
while booting.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
The SPDK-NVMe is needed for the integration test for vfio_user.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Signed-off-by: Bo Chen <chen.bo@intel.com>
AArch64 does not use IOBAR, and current code of panics the whole VMM if
we need to allocate the IOBAR.
This commit checks if IOBAR is enabled before the arch conditional code
of IOBAR allocation and if the IOBAR is not enabled, we can just skip
the IOBAR allocation and do nothing.
Fixes: https://github.com/cloud-hypervisor/cloud-hypervisor/issues/3479
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Ensure all pending virtio activations (as triggered by MMIO write on the
vCPU threads leading to a barrier wait) are completed before pausing the
vCPUs as otherwise there will a deadlock with the VMM waiting for the
vCPU to acknowledge it's pause and the vCPU waiting for the VMM to
activate the device and release the barrier.
Fixes: #3585
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The code can be written in a better form and the clippy warning
suppression can be dropped.
No functional change.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
These are the leftovers from the commit 8155be2:
arch: aarch64: vm_memory is not required when configuring vcpu
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Update documentation and CI to rely on the new CLOUDHV.fd firmware built
from the newly introduced target CloudHvX64.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By pinning the OVMF version, we will be able to update the EDK2 fork
with a new version without potentially breaking our Cloud Hypervisor CI.
Once the new version is ready on the EDK2 fork, we'll be able to update
Cloud Hypervisor codebase, replacing the fixed version with the latest,
as well as replacing OVMF.fd with CLOUDHV.fd. This is because we'll
start building from the new target CloudHvX64.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When in local migration mode send the FDs for the guest memory over the
socket along with the slot that the FD is associated with. This removes
the requirement for copying the guest RAM and gives significantly faster
live migration performance (of the order of 3s to 60ms).
Fixes: #3566
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Create the VM using the FDs (wrapped in Files) that have been received
during the migration process.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If this FD (wrapped in a File) is supplied when the RAM region is being
created use that over creating a new one.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This function is used to open an FD (wrapped in a File) that points to
guest memory from memfd_create() or backed on the filesystem.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Currently cloud-hypervisor supports hotplug of CPUs, passthrough devices, virtio devices and memory resizing,
but in hotplug.md it still mentiones: "Currently Cloud Hypervisor only supports hot plugging of CPU devices."
We need to remove the incorrect information from hotplug.md to reflect the true situation.
Fixes: #3504
Signed-off-by: Liang Zhou <zhoul110@chinatelecom.cn>
Drop the unused parameter throughout the code base.
Also take the chance to drop a needless clone.
No functional change intended.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
error: unneeded late initalization
Error: --> devices/src/legacy/rtc_pl031.rs:294:9
|
294 | let v;
| ^^^^^^
|
= note: `-D clippy::needless-late-init` implied by `-D warnings`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `v` here
|
297 | let v = if (AMBA_ID_LOW..AMBA_ID_HIGH).contains(&offset) {
| +++++++
help: remove the assignments from the branches
|
299 ~ u32::from(PL031_ID[index])
300 | } else {
301 ~ match offset {
302 | RTCDR => self.get_time(),
303 | RTCMR => {
304 | // Even though we are not implementing RTC alarm we return the last value
...
help: add a semicolon after the `if` expression
|
317 | };
| +
error: unneeded late initalization
Error: --> devices/src/legacy/uart_pl011.rs:297:9
|
297 | let v;
| ^^^^^^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `v` here
|
299 | let v = if (AMBA_ID_LOW..AMBA_ID_HIGH).contains(&(offset >> 2)) {
| +++++++
help: remove the assignments from the branches
|
301 ~ u32::from(PL011_ID[index])
302 | } else {
303 ~ match offset >> 2 {
304 | UARTDR => {
305 | let c: u32;
306 | let r: u32;
...
help: add a semicolon after the `if` expression
|
340 | };
| +
error: unneeded late initalization
Error: --> devices/src/legacy/uart_pl011.rs:305:21
|
305 | let c: u32;
| ^^^^^^^^^^^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `c` here
|
309 | let c: u32 = self.read_fifo.pop_front().unwrap_or_default().into();
| ~~~~~~~~~~
error: unneeded late initalization
Error: --> devices/src/legacy/uart_pl011.rs:306:21
|
306 | let r: u32;
| ^^^^^^^^^^^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `r` here
|
320 | let r: u32 = c;
| ~~~~~~~~~~
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
error: this boolean expression can be simplified
--> tests/integration.rs:3755:33
|
3755 | assert!(!(empty > 5), "No login on pty");
| ^^^^^^^^^^^^ help: try: `empty <= 5`
|
= note: `-D clippy::nonminimal-bool` implied by `-D warnings`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
error: unneeded late initalization
--> tests/integration.rs:7619:13
|
7619 | let mut success;
| ^^^^^^^^^^^^^^^^
|
= note: `-D clippy::needless-late-init` implied by `-D warnings`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `success` here
|
7621 | let mut success = if let Some(status) = send_migration
| +++++++++++++++++
help: remove the assignments from the branches
|
7625 ~ status.success()
7626 | } else {
7627 ~ false
|
help: add a semicolon after the `if` expression
|
7628 | };
| +
error: unneeded late initalization
--> tests/integration.rs:7838:13
|
7838 | let mut success;
| ^^^^^^^^^^^^^^^^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `success` here
|
7840 | let mut success = if let Some(status) = send_migration
| +++++++++++++++++
help: remove the assignments from the branches
|
7844 ~ status.success()
7845 | } else {
7846 ~ false
|
help: add a semicolon after the `if` expression
|
7847 | };
| +
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
error: unneeded late initalization
Error: --> arch/src/aarch64/gic/gicv3_its.rs:127:9
|
127 | let attr: u64;
| ^^^^^^^^^^^^^^
|
= note: `-D clippy::needless-late-init` implied by `-D warnings`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `attr` here
|
128 | let attr: u64 = if save {
| +++++++++++++++
help: remove the assignments from the branches
|
129 ~ u64::from(kvm_bindings::KVM_DEV_ARM_ITS_SAVE_TABLES)
130 | } else {
131 ~ u64::from(kvm_bindings::KVM_DEV_ARM_ITS_RESTORE_TABLES)
|
help: add a semicolon after the `if` expression
|
132 | };
| +
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
We've been currently using "fd" as the field name, but it should be
called "fds" since 6664e5a6e7 introduced
the name change on the structure field.
Fixes: #3560
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
Passing no boot related parameters (e.g. no --kernel) is used for e.g.
receiving a live migration or an API based boot.
marvin:~/src/cloud-hypervisor (2022-01-11-live-migration-with-fds *)$ target/debug/cloud-hypervisor --api-socket /tmp/api2
thread 'main' panicked at '`tdx` is not a name of an argument or a group.
Make sure you're using the name of the argument itself and not the name of short or long flags.', /home/rob/.cargo/registry/src/github.com-1ecc6299db9ec823/clap-3.0.6/src/parse/matches/arg_matches.rs:598:14
stack backtrace:
0: rust_begin_unwind
at /rustc/7d6f948173ccb18822bab13d548c65632db5f0aa/library/std/src/panicking.rs:498:5
1: core::panicking::panic_fmt
at /rustc/7d6f948173ccb18822bab13d548c65632db5f0aa/library/core/src/panicking.rs:107:14
2: clap::parse::matches::arg_matches::ArgMatches::get_arg
at /home/rob/.cargo/registry/src/github.com-1ecc6299db9ec823/clap-3.0.6/src/parse/matches/arg_matches.rs:1052:17
3: clap::parse::matches::arg_matches::ArgMatches::is_present
at /home/rob/.cargo/registry/src/github.com-1ecc6299db9ec823/clap-3.0.6/src/parse/matches/arg_matches.rs:598:9
4: cloud_hypervisor::start_vmm
at ./src/main.rs:530:46
5: cloud_hypervisor::main
at ./src/main.rs:566:27
6: core::ops::function::FnOnce::call_once
at /rustc/7d6f948173ccb18822bab13d548c65632db5f0aa/library/core/src/ops/function.rs:227:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
`tap` has its default value set to `None`, but in the openapi yaml file
we've been setting it to `""`.
When using this code on the Kata Containers side we'd be hit by a non
expected behaviour of cloud-hypervisor, as even when using a different
method to initialise the `tuntap` device the code would be treated as if
using `--net tap` (which is a valid use-case).
Related: #3554
Signed-off-by: Fabiano Fidêncio <fabiano.fidencio@intel.com>
When enabling the `mshv` feature, we skip quite some tests and
hence have known dead-code. This annotation silences dead-code
related warnings for our quality workflow to pass.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Given integration tests don't have special annotations, all our
integration test scripts do not need to carry special flags when running
`cargo test`. This commit also removed the "test::" prefix for
pattern-matching different set of integration tests.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Given integration tests are placed in a dedicate directory, they don't
need annotations (e.g. `#[cfg(integration_test)]` and `#[cfg(test)]`) or
defining `test mod` to exclude themselves from the common compilation
process.
Signed-off-by: Bo Chen <chen.bo@intel.com>
warning: unneeded late initalization
--> src/main.rs:134:5
|
134 | let mut app: App;
| ^^^^^^^^^^^^^^^^^
|
= note: `#[warn(clippy::needless_late_init)]` on by default
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `app` here
|
138 | let mut app: App = App::new("cloud-hypervisor")
| ~~~~~~~~~~~~~~~~
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: unneeded late initalization
--> vmm/src/acpi.rs:525:5
|
525 | let mut prev_tbl_len: u64;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(clippy::needless_late_init)]` on by default
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `prev_tbl_len` here
|
552 | let mut prev_tbl_len: u64 = madt.len() as u64;
| ~~~~~~~~~~~~~~~~~~~~~~~~~
warning: unneeded late initalization
--> vmm/src/acpi.rs:526:5
|
526 | let mut prev_tbl_off: GuestAddress;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `prev_tbl_off` here
|
553 | let mut prev_tbl_off: GuestAddress = madt_offset;
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: unneeded late initalization
--> virtio-queue/src/chain.rs:381:13
|
381 | let desc: Descriptor;
| ^^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(clippy::needless_late_init)]` on by default
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init
help: declare `desc` here
|
382 | let desc: Descriptor = if i < 3 {
| ++++++++++++++++++++++
help: remove the assignments from the branches
|
383 ~ Descriptor::new(0x1000 * i as u64, 0x1000, VIRTQ_DESC_F_NEXT, i + 1)
384 | } else {
385 ~ Descriptor::new(0x1000 * i as u64, 0x1000, 0, 0)
|
help: add a semicolon after the `if` expression
|
386 | };
| +
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Current command to run cloud-hypervisor binary has
wrong --rng argument in the README file.
This commit fixes all the references of --rng argument
by removing the --rng option to use default.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
This crate contains up to date definition of the Queue, AvailIter,
DescriptorChain and Descriptor structures forked from the upstream
crate rust-vmm/vm-virtio 27b18af01ee2d9564626e084a758a2b496d2c618.
The following patches have been applied on top of this base in order to
make it work correctly with Cloud Hypervisor requirements:
- Add MSI vector field to the Queue
In order to help with MSI/MSI-X support, it is convenient to store the
value of the interrupt vector inside the Queue directly.
- Handle address translations
For devices with access to data in memory being translated, we add to
the Queue the ability to translate the address stored in the
descriptor.
It is very helpful as it performs the translation right after the
untranslated address is read from memory, avoiding any errors from
happening from the consumer's crate perspective. It also allows the
consumer to reduce greatly the amount of duplicated code for applying
the translation in many different places.
- Add helpers for Queue structure
They are meant to help crate's consumers getting/setting information
about the Queue.
These patches can be found on the 'ch' branch from the Cloud Hypervisor
fork: https://github.com/cloud-hypervisor/vm-virtio.git
This patch takes care of updating the Cloud Hypervisor code in
virtio-devices and vm-virtio to build correctly with the latest version
of virtio-queue.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This crate was used in the integration tests to allow the tests to
continue and clean up after a failure. This isn't necessary in the unit
tests and adds a large build dependency chain including an unmaintained
crate.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This updated tree now includes a fix for virtio-net regression that was
present in 5.14:
commit 732b74d647048668f0f8dc0c848f0746c69e2e2f
Author: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Date: Sat Oct 9 05:17:53 2021 -0400
virtio-net: fix for skb_over_panic inside big mode
commit 126285651b7f ("Merge ra.kernel.org:/pub/scm/linux/kernel/git/netdev/net")
accidentally reverted the effect of
commit 1a8024239da ("virtio-net: fix for skb_over_panic inside big mode")
on drivers/net/virtio_net.c
As a result, users of crosvm (which is using large packet mode)
are experiencing crashes with 5.14-rc1 and above that do not
occur with 5.13.
Crash trace:
[ 61.346677] skbuff: skb_over_panic: text:ffffffff881ae2c7 len:3762 put:3762 head:ffff8a5ec8c22000 data:ffff8a5ec8c22010 tail:0xec2 end:0xec0 dev:<NULL>
[ 61.369192] kernel BUG at net/core/skbuff.c:111!
[ 61.372840] invalid opcode: 0000 [#1] SMP PTI
[ 61.374892] CPU: 5 PID: 0 Comm: swapper/5 Not tainted 5.14.0-rc1 linux-v5.14-rc1-for-mesa-ci.tar.bz2 #1
[ 61.376450] Hardware name: ChromiumOS crosvm, BIOS 0
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When forwarding an epoll event from the unix muxer to the
targeted connection event handler, the eventset the connection
registered is forwarded instead of the actual epoll
operation (IN/OUT).
For example, if the connection was registered for EPOLLIN,
and receives an EPOLLOUT, the connection will actually handle
an EPOLLOUT.
This is the root cause of previous bug, which caused the
introduction of some workarounds (i.e: handling ewouldblock
when reading after receiving EPOLLIN, which should never happen).
When matching the connection, we retrieve and use the evset of
the connection instead of the one passed as a parameter.
The compiler does not complain for an unused variable because
it was first logged in a debug! statement.
This is an unfortunate naming mistake that caused a lot of problems.
Fixes#3497
Signed-off-by: Eduard Kyvenko <eduard.kyvenko@gmail.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If the underlying kernel is old PTY resize is disabled and this is
represented by the use of None in the provided Option<File> type. In the
virtio-console PTY path don't blindly unwrap() the value that will be
preserved across a reboot.
Fixes: #3496
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The test test_virtio_block_topology is flaky on aarch64, let's disable
it until we find the right way to fix it.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
There is a corner case of using the Cloud Hypervisor on AArch64:
If the VM is started on a device where RAM is limited, and if the user
allocates nearly as much memory for the guest as is still free on the
host, we need to enable the swap memory.
This commit documented this corner case with explanation.
Also, this commit corrects the hardware requirement of the GIC interrupt
controller for running the Cloud Hypervisor on AArch64, accroding to
[1].
Fixes: https://github.com/cloud-hypervisor/cloud-hypervisor/issues/3419
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
[1] https://www.kernel.org/doc/html/latest/virt/kvm/devices/arm-vgic-its.html
It's important to maintain the ability to run in a non-TDX environment
a Cloud Hypervisor binary with the 'tdx' feature enabled.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This test relies on using losetup with a block size to create a block
device from a file that has a specific block size for the topology
detection code to pick up and passthrough to the guest.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If the disk is backed by a block device on the host a non-default
topology will be available and that topology can be advertised by virtio
block.
Fixes: #3262
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
For simplicity this trait implements a default version that has a
topology with 512 byte (i.e. sector) recommended sizes.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Setting up the SIGWINCH handler requires at least Linux 5.7. However
this functionality is not required for basic PTY operation.
Fixes: #3456
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This reverts commit 58d25b3ccc.
This change introduced a regression when running iperf with the guest
running as the server:
marvin:~/src/cloud-hypervisor ((58d25b3c...))$ iperf -c 192.168.249.2
------------------------------------------------------------
Client connecting to 192.168.249.2, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 1] local 192.168.249.1 port 47078 connected with 192.168.249.2 port 5001
[ ID] Interval Transfer Bandwidth
[ 1] 0.00-10.40 sec 14.0 MBytes 11.3 Mbits/sec
marvin:~/src/cloud-hypervisor ((58d25b3c...))$ iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 128 KByte (default)
------------------------------------------------------------
[ 1] local 192.168.249.1 port 5001 connected with 192.168.249.2 port 42866
[ ID] Interval Transfer Bandwidth
[ 1] 0.00-10.01 sec 51.2 GBytes 44.0 Gbits/sec
Fixes: #3450
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The sendmsg() syscall is limited in the number of fds it can handle.
This number matches that used by the vfio-user library and is
conservative (since we've seen it work with 64 fds.)
Fixes: #3401
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This time we use the Rust Hypervisor Firmware for test_vfio_user() in
order to fix the systemd issues we've seen so far.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Advertise the PCI MMIO config spaces here so that the MMIO config space
is correctly recognised.
Tested by: --platform num_pci_segments=1 or 16 hotplug NVMe vfio-user device
works correctly with hypervisor-fw & OVMF and direct kernel boot.
Fixes: #3432
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When restoring replace the internal value of the device tree rather than
replacing the Arc<Mutex<DeviceTree>> itself. This is fixes an issue
where the AddressManager has a copy of the the original
Arc<Mutex<DeviceTree>> from when the DeviceManager was created. The
original restore path only replaced the DeviceManager's version of the
Arc<Mutex<DeviceTree>>. Instead replace the contents of the
Arc<Mutex<DeviceTree>> so all users see the updated version.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The observation is that the code in question was used to bridge
synchronized and asynchronized code.
We can group the functions for that purpose under an adaptor trait. To
limit the scope of locking, the users of the trait are required to
implement a method to return a MutexGuard for the underlying file.
This then allows us to use concrete types (QcowFile and Vhdx) in code,
which is easier to read than a bunch of traits.
No functional change intended.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Saving the KVM clock and restoring it is key for correct behaviour of
the VM when doing snapshot/restore or live migration. The clock is
restored to the KVM state as part of the Vm::resume() method prior to
that it must be extracted from the state object and stored for later use
by this method. This change simplifies the extraction and storage part
so that it is done in the same way for both snapshot/restore and live
migration.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit enhances the integration test for multiple PCI segments
by:
(1) Enables the `test_virtio_fs_multi_segment` on AArch64.
(2) Adds a new integration test case for both x86_64 and AArch64 using
the direct kernel boot to test virtio-disk multiple PCI segments.
The test case does:
- Start a VM using direct kernel boot with 16 PCI segments and assign
the last PCI segment with a virtio-disk device.
- Check if the number of PCI host bridges equals to 16 after VM boots.
- Mount the virtio-disk device on the last PCI segment to the rootfs
and write/read data to the virtio-disk device.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Each PCI device under a root complex is uniquely identified by its
Requester ID (AKA RID). A Requester ID is a triplet of a Bus number,
Device number, and Function number.
MSIs may be distinguished in part through the use of sideband data
accompanying writes. In the case of PCI devices, this sideband data
may be derived from the Requester ID. A mechanism is required to
associate a device with both the MSI controllers it can address,
and the sideband data that will be associated with its writes to
those controllers.
This commit adds the `msi-map` property for PCI nodes, therefore
creating MSI mapping for each PCI device.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit rewrites the `create_pci_node` in the FDT creator to
create multiple PCI nodes based on the vector of `PciSpaceInfo`,
and each PCI node in FDT reflects a PCI segment.
- The PCI MMIO config space, 32 bits PCI device space and 64 bits
PCI device space is re-calculated based on the `PciSpaceInfo` for
each PCI segment.
- A new FDT property `linux,pci-domain` is added.
- The virtio-iommu node is only created for the first PCI segment.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
The constant `PCI_MMIO_CONFIG_SIZE` defined in `vmm/pci_segment.rs`
describes the MMIO configuation size for each PCI segment. However,
this name conflicts with the `PCI_MMCONFIG_SIZE` defined in `layout.rs`
in the `arch` crate, which describes the memory size of the PCI MMIO
configuration region.
Therefore, this commit renames the `PCI_MMIO_CONFIG_SIZE` to
`PCI_MMIO_CONFIG_SIZE_PER_SEGMENT` and moves this constant from `vmm`
crate to `arch` crate.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Currently, a tuple containing PCI space start address and PCI space
size is used to pass the PCI space information to the FDT creator.
In order to support the multiple PCI segment for FDT, more information
such as the PCI segment ID should be passed to the FDT creator. If we
still use a tuple to store these information, the code flexibility and
readablity will be harmed.
To address this issue, this commit replaces the tuple containing the
PCI space information to a structure `PciSpaceInfo` and uses a vector
of `PciSpaceInfo` to store PCI space information for each segment, so
that multiple PCI segment information can be passed to the FDT together.
Note that the scope of this commit will only contain the refactor of
original code, the actual multiple PCI segments support will be in
following series, and for now `--platform num_pci_segments` should only
be 1.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Previously mutex (semaphore) and file were separated. The code needed to
create artificial scopes to use mutex to protect file.
Rewrite the code to be idiomatic. The file itself is turned into a trait
object and placed inside the mutex. This requires providing a new
ReadWriteSeekFile trait to unify all helper functions.
The rewrite further simplified vhdx_sync code. The original code
contained two mutex'es for no apparent reason.
No functional change intended.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Extending the test_simple_launch() integration test to validate Cloud
Hypervisor boots correctly with both rust-hypervisor-fw and OVMF on
x86_64 platforms.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Bumping the OVMF binary version along with UEFI documentation to
reflect the latest set of patches on top of tianocore/edk2 'master'
branch, which can be found on the Cloud Hypervisor fork on 'ch' branch.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to avoid the identity map region to conflict with a possible
firmware being placed in the last 4MiB of the 4GiB range, we must set
the address to a chosen location. And it makes the most sense to have
this region placed right after the TSS region.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Extending the Vm trait with set_identity_map_address() in order to
expose this ioctl to the VMM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Commit ac25172176 bumps the rust
version of virtiofsd named `virtiofsd-rs`, which causes a warning
```
warning: use of deprecated parameter '--socket':
Please use the '--socket-path' option instead.
```
This commit updates the cmdline parameter accordingly.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Place the 3 page TSS at an explicit location in the 32-bit address space
to avoid conflicting with the loaded raw firmware.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
sh 'scripts/dev_cli.sh tests --metrics -- -- --report-file /root/workloads/metrics.json'
}
}
stage('Upload metrics report') {
steps {
sh 'curl -X PUT https://cloud-hypervisor-metrics.azurewebsites.net/api/publishmetrics -H "x-functions-key: $METRICS_PUBLISH_KEY" -T ~/workloads/metrics.json'
}
}
}
}
}
}
}
post {
regression {
script {
if (env.BRANCH_NAME == 'main') {
slackSend(color: '#ff0000', message: '"main" branch build is now failing', channel: '#jenkins-ci')
}
}
}
fixed {
script {
if (env.BRANCH_NAME == 'main') {
slackSend(color: '#00ff00', message: '"main" branch build is now fixed', channel: '#jenkins-ci')
}
}
}
}
}
def cancelPreviousBuilds() {
// Check for other instances of this particular build, cancel any that are older than the current one
- [Firecracker and crosvm](#firecracker-and-crosvm)
- [Roadmap](#roadmap)
- [4. Relationship with _Rust VMM_ Project](#4-relationship-with-rust-vmm-project)
- [Differences with Firecracker and crosvm](#differences-with-firecracker-and-crosvm)
- [5. Community](#5-community)
- [Contribute](#contribute)
- [Join us](#join-us)
- [Slack](#slack)
- [Mailing list](#mailing-list)
- [Security issues](#security-issues)
# 1. What is Cloud Hypervisor?
Cloud Hypervisor is an open source Virtual Machine Monitor (VMM) that runs on top of [KVM](https://www.kernel.org/doc/Documentation/virtual/kvm/api.txt) and the MSHV hypervisors .
Cloud Hypervisor is an open source Virtual Machine Monitor (VMM) that runs on
top of the [KVM](https://www.kernel.org/doc/Documentation/virtual/kvm/api.txt)
hypervisor and the Microsoft Hypervisor (MSHV).
The project focuses on exclusively running modern, cloud workloads, on top of a limited set of hardware architectures and platforms.
Cloud workloads refers to those that are usually run by customers inside a cloud provider. For our purposes this means modern operating systems with most I/O handled by paravirtualised devices (i.e. virtio), no requirement for legacy devices, and 64-bit CPUs.
The project focuses on running modern, _Cloud Workloads_, on specific, common,
hardware architectures. In this case _Cloud Workloads_ refers to those that are
run by customers inside a Cloud Service Provider. This means modern operating
systems with most I/O handled by
paravirtualised devices (e.g. _virtio_), no requirement for legacy devices, and
64-bit CPUs.
Cloud Hypervisor is implemented in [Rust](https://www.rust-lang.org/) and is based on the [rust-vmm](https://github.com/rust-vmm) crates.
Cloud Hypervisor is implemented in [Rust](https://www.rust-lang.org/) and is
based on the [Rust VMM](https://github.com/rust-vmm) crates.
## Objectives
@@ -50,7 +59,9 @@ Cloud Hypervisor is implemented in [Rust](https://www.rust-lang.org/) and is bas
### Architectures
Cloud Hypervisor supports the `x86-64` and `AArch64` architectures. There are some small differences in functionality between the two architectures (see [#1125](https://github.com/cloud-hypervisor/cloud-hypervisor/issues/1125)).
Cloud Hypervisor supports the `x86-64` and `AArch64` architectures. There are
minor differences in functionality between the two architectures
(see [#1125](https://github.com/cloud-hypervisor/cloud-hypervisor/issues/1125)).
### Guest OS
@@ -58,183 +69,158 @@ Cloud Hypervisor supports `64-bit Linux` and Windows 10/Windows Server 2019.
# 2. Getting Started
Below sections describe how to build and run Cloud Hypervisor on the`x86_64`
platform. For getting started on the `AArch64` platform, please refer to the
[Arm64 documentation](docs/arm64.md).
The following sections describe how to build and run Cloud Hypervisor on the
`x86-64`platform. For getting started on the `AArch64` platform, please refer
to the
[AArch64 documentation](docs/arm64.md).
## Preparation
## Host OS
We create a folder to build and run `cloud-hypervisor` at `$HOME/cloud-hypervisor`
For required KVM functionality the minimum host kernel version is 4.11. For
adequate performance the minimum recommended host kernel version is 5.6. The
majority of the CI currently tests with kernel version 5.15.
## Use Pre-built Binaries
The recommended approach to getting started with Cloud Hypervisor is by using a
pre-built binary. Binaries are available for the [latest
Multiple arguments can be given to the `--disk` parameter.
### Custom Kernel and Disk Image
### Custom kernel and disk image
#### Building your Kernel
#### Building your kernel
Cloud Hypervisor also supports direct kernel boot into a `vmlinux` ELF kernel. In order to support virtio-iommu we have our own development branch. You are of course able to use your own kernel but these instructions will continue with the version that we develop and test against.
Cloud Hypervisor also supports direct kernel boot into a `vmlinux` ELF kernel (compiled with PVH support). In order to support development there is a custom branch; however provided the required options are enabled any recent kernel will suffice.
Direct kernel boot to userspace should work with a rootfs from most distributions.
Direct kernel boot to userspace should work with a rootfs from most
distributions although you may need to enable exotic filesystem types in the
reference kernel configuration (e.g. XFS or btrfs.)
## Hot Plug
Cloud Hypervisor supports hotplug of CPUs, passthrough devices (VFIO),`virtio-{net,block,pmem,fs,vsock}` and memory resizing. This [document](docs/hotplug.md) details how to add devices to
a running VM.
Cloud Hypervisor supports hotplug of CPUs, passthrough devices (VFIO),
`virtio-{net,block,pmem,fs,vsock}` and memory resizing. This
[document](docs/hotplug.md) details how to add devices to a running VM.
## Device Model
Details of the device model can be found in this [documentation](docs/device_model.md).
Details of the device model can be found in this
[documentation](docs/device_model.md).
## TODO
## Roadmap
We are not tracking the Cloud Hypervisor TODO list from a specific git tracked file but through
are all equal and welcome means of contribution. See the
[CONTRIBUTING](CONTRIBUTING.md) document for more details.
## Join us
## Slack
Get an [invite to our Slack channel](https://join.slack.com/t/cloud-hypervisor/shared_invite/enQtNjY3MTE3MDkwNDQ4LWQ1MTA1ZDVmODkwMWQ1MTRhYzk4ZGNlN2UwNTI3ZmFlODU0OTcwOWZjMTkwZDExYWE3YjFmNzgzY2FmNDAyMjI)
and [join us on Slack](https://cloud-hypervisor.slack.com/).
## Mailing list
Please report bugs using the [GitHub issue
tracker](https://github.com/cloud-hypervisor/cloud-hypervisor/issues) but for
broader community discussions you may use our [mailing
list](https://lists.cloudhypervisor.org/g/dev/).
## Security issues
Please use the GitHub security advisories feature for reporting issues: https://github.com/cloud-hypervisor/cloud-hypervisor/security/advisories/new
Please contact the maintainers listed in the MAINTAINERS.md file with security issues.
- [Containerized builds and tests](#containerized-builds-and-tests)
# Building Cloud Hypervisor
We recommend users use the pre-built binaries that are mentioned in the README.md file in the root of the repository. Building from source is only necessary if you wish to make modifications.
## Preparation
We create a folder to build and run `cloud-hypervisor` at `$HOME/cloud-hypervisor`
```shell
$ exportCLOUDH=$HOME/cloud-hypervisor
$ mkdir $CLOUDH
```
## Install prerequisites
You need to install some prerequisite packages in order to build and test Cloud
Hypervisor. Here, all the steps are based on Ubuntu, for other Linux
distributions please replace the package manager and package name.
```shell
# Install build-essential, git, and qemu-utils
$ sudo apt install git build-essential qemu-utils
# Install rust tool chain
$ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
# If you want to build statically linked binary please add musl target
$ rustup target add x86_64-unknown-linux-musl
```
## Clone and build
First you need to clone and build the Cloud Hypervisor repository:
In the context of virtualization, it is always convenient to be able to share a directory from the host with the guest.
In the context of virtualization, it is always convenient to be able to share a
directory from the host with the guest.
__virtio-fs__, also known as __vhost-user-fs__ is a virtual device defined by the VIRTIO specification which allows any VMM to perform filesystem sharing.
__virtio-fs__, also known as __vhost-user-fs__ is a virtual device defined by
the VIRTIO specification which allows any VMM to perform filesystem sharing.
## Pre-requisites
### The daemon
This virtual device relies on the _vhost-user_ protocol, which assumes the backend (device emulation) is handled by a dedicated process running on the host. This daemon is called __virtiofsd__ and needs to be present on the host.
This virtual device relies on the _vhost-user_ protocol, which assumes the
backend (device emulation) is handled by a dedicated process running on the
host. This daemon is called __virtiofsd__ and needs to be present on the host.
The `cache=none` option should be the default when using `virtiofsd` with the __cloud-hypervisor__ VMM. This prevents from using the guest page cache, which reduces the memory footprint of the guest. When running multiple virtual machines on the same host, this will let the host deal with page cache, which will increase the density of virtual machines which can be launched.
The `cache=never` option is the default when using `virtiofsd` with
Cloud Hypervisor. This prevents from using the host page cache, reducing the
overall footprint on host memory. This increases the maximum density of virtual
machines that can be launched on a single host.
The `cache=always` option will allow for the guest page cache to be used, which will increase the memory footprint of the guest. This option should be used only for specific use cases where a single VM is going to be running on a host.
The `cache=always` option will allow the host page cache to be used, which can
result in better performance for the guest's workload at the cost of increasing
the footprint on host memory.
The `thread-pool-size` option controls how many IO threads are spawned. For
very fast storage like NVMe spawning enough worker threads is critical to
getting an acceptable performance compared to native.
### Kernel support
Modern Linux kernels starting (at least v5.10) have support for virtio-fs. Use
of older kernels, with additional patches, are not supported.
Modern Linux kernels (at least v5.10) have support for virtio-fs. Use of older
kernels, with additional patches, are not supported.
## How to share directories with cloud-hypervisor
### Start the VM
Once the daemon is running, the option `--fs` from __cloud-hypervisor__ needs to be used.
Direct kernel boot is the preferred option, but we can boot from an EFI cloud image if it contains a recent enough kernel.
Once the daemon is running, the option `--fs` from Cloud Hypervisor needs
to be used.
Because _vhost-user_ expects a dedicated process (__virtiofsd__ in this case) to be able to access the guest RAM to communicate through the _virtqueues_ with the driver running in the guest, `--memory` option needs to be slightly modified. It must specify `shared=on` to share the memory pages so that an external process can access them.
Both direct kernel boot and EFI firmware can be used to boot a VM with
virtio-fs, given that the cloud image contains a recent enough kernel.
Assuming you have `focal-server-cloudimg-amd64.raw` and `vmlinux` on your system, here is the __cloud-hypervisor__ command you need to run:
Correct functioning of `--fs` requires `--memory shared=on` to facilitate
interprocess memory sharing.
Assuming you have `focal-server-cloudimg-amd64.raw` and `vmlinux` on your
system, here is the Cloud Hypervisor command you need to run:
```bash
./cloud-hypervisor \
--cpus boot=1\
@@ -60,26 +79,20 @@ Assuming you have `focal-server-cloudimg-amd64.raw` and `vmlinux` on your system
By default, DAX is enabled with a cache window of 8GiB. You can specify a custom size (let's say 4GiB for this example) for the cache by explicitly setting DAX and the cache size:
In case you don't want to use a shared window of cache to pass the shared files content, this means you will have to explicitly disable DAX with `dax=off`. Note that in this case, the `cache_size` parameter will be ignored.
The last step is to mount the shared directory inside the guest, using the `virtiofs` filesystem type.
The last step is to mount the shared directory inside the guest, using the
`virtiofs` filesystem type.
```bash
mkdir mount_dir
mount -t virtiofs -o dax myfs mount_dir/
mount -t virtiofs myfs mount_dir/
```
The `tag` needs to be consistent with what has been provided through the __cloud-hypervisor__ command line, which happens to be `myfs` in this example.
The `-o dax` option must be removed in case the shared cache region is not enabled from the VMM.
The `tag` needs to be consistent with what has been provided through the
Cloud Hypervisor command line, which happens to be `myfs` in this example.
## DAX feature
Given the DAX feature is not stable yet from a daemon standpoint, it is not
cloud-hypervisor can emulate one or more virtual network interfaces, represented at the hypervisor host by [tap devices](https://www.kernel.org/doc/Documentation/networking/tuntap.txt). This guide briefly describes, in a manual and distribution neutral way, how to setup and use networking with cloud-hypervisor.
## Multiple queue support for net devices
While multiple vcpus defined for guest, to gain the benefit of vcpu scalable to improve performance, it suggests to define multiple queue pairs for net devices, one Tx/Rx queue pair per one vcpu, that means the number of queue pairs at least is equal to the vcpu count. In that case, after virtnet driver set cpu affinity for virtqueues in guest kernel, vcpus could handle interrupt from different virtqueue pairs in parallel.
It will gain better performance for guest that has multiple queues defined for net devices while it has multiple net sessions running in userspace.
To enable multiple queue support in cloud-hypervisor, multiple queue pairs will be defined, while multiple tap fds will be opened for the same tap device, it will also have multiple threads started, each thread will monitor and handle the events from each virtqueue pairs and the associated tap fd.
Note:
- Currently, it does not support to use ethtool to change the combined queue numbers in guest.
- Multiple queue is enabled for vhost-user-net backend in cloud-hypervisor, however, multiple thread is not added to handle mq, thus, the performance for vhost-user-net backend is not supposed to be improved. The multiple thread will be added for backend later.
- Performance test for vhost-user-net will be covered once vhost-user-net backend has multiple thread supported.
- Performance test for virtio-net is done by comparing 2 queue pairs with 1 queue pairs, that to run 2 iperf3 sessions in the same test environments, throughput is improved about 37%.
## Start cloud-hypervisor with net devices
Use one `--net` command-line argument from cloud-hypervisor to specify the emulation of one or more virtual NIC's. The example below instructs cloud-hypervisor to emulate for instance 2 virtual NIC's:
num_queues is the total number of tx and rx queues, the default value is 2, and it could be increased by multiples of 2. Additionally, num_queues is suggested to be as 2 times of vcpu count. The default value for queue_size is 256.
If the tap device is pre-created on host before guest boot up. To use multiple queue support for net device in guest, the tap device should be opened like this from host.
```bash
[root@localhost ~]# ip tuntap add name ich0 mode tap multi_queue
```
And the `--net` device should specify support for multiple queues. `num_queues` must be a multiple of 2 starting at least from 4 since multiple queues really means multiple queue pairs. We need at least 2 pairs for this configuration to be correct:
Different networking models can be used to provide external connectivity. In this example we will
use 2 linux bridges emulating 2 different networks. The integration bridge (ich-int) in this example will also be used
for external connectivity.
Create the bridges and connect the cloud-hypervisor tap devices to the bridges:
```bash
root@host:~# brctl addbr ich-int
root@host:~# brctl addbr ich-dpl
root@host:~# ip link set up ich-int
root@host:~# ip link set up ich-dpl
root@host:~# brctl addif ich-int ich0
root@host:~# brctl addif ich-dpl ich1
root@host:~# brctl show
bridge name bridge id STP enabled interfaces
ich-dpl 8000.067afc1b9a67 no ich1
ich-int 8000.725412ffce6f no ich0
```
This completes the layer 2 wiring: The cloud-hypervisor is now connected to the hypervisor host via the 2 linux bridges.
## IP (Layer 3) provisioning
### Hypervisor host
On the hypervisor host add the network gateway IP address of each network to the 2 linux bridges:
```bash
root@host:~# ip addr add 192.168.4.1/24 dev ich-int
root@host:~# ip addr add 10.0.1.1/24 dev ich-dpl
```
The routing table of the hypervisor host should now also have corresponding routing entries:
```bash
root@host:~# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.178.1 0.0.0.0 UG 60000 wlan1
10.0.1.0 0.0.0.0 255.255.255.0 U 000 ich-dpl
192.168.4.0 0.0.0.0 255.255.255.0 U 000 ich-int
192.168.178.0 0.0.0.0 255.255.255.0 U 60000 wlan1
```
### Virtual Machine
Within the virtual machine set the vNIC's to up state and provision the corresponding IP addresses on the 2 vNIC's. The steps outlined below use the ip command as an example. Alternative distribution specific procedures can also apply.
```bash
root@guest:~# ip link set up enp0s2
root@guest:~# ip link set up enp0s3
root@guest:~# ip addr add 192.168.4.2/24 dev enp0s2
root@guest:~# ip addr add 10.0.1.2/24 dev enp0s3
```
IP connectivity between the virtual machine and the hypervisor-host can be verified by sending
ICMP requests to the hypervisor-host for the gateway IP address from within the virtual machine:
```bash
root@guest:~# ping 192.168.4.1
PING 192.168.4.1 (192.168.4.1) 56(84) bytes of data.
64 bytes from 192.168.4.1: icmp_seq=1ttl=64time=0.456 ms
64 bytes from 192.168.4.1: icmp_seq=2ttl=64time=0.226 ms
root@guest:~# ping 10.0.1.1
PING 10.0.1.1 (10.0.1.1) 56(84) bytes of data.
64 bytes from 10.0.1.1: icmp_seq=1ttl=64time=0.449 ms
64 bytes from 10.0.1.1: icmp_seq=2ttl=64time=0.393 ms
```
The connection can now be used for instance to log into the virtual machine with
ssh under the precondition that the machine has an ssh daemon provisioned:
```bash
root@host:~# ssh root@192.168.4.2
The authenticity of host '192.168.4.2 (192.168.4.2)' can't be established.
ECDSA key fingerprint is SHA256:qNAUmTtDMW9pNuZARkpLQhfw+Yc1tqUDBrQp7aZGSjw.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.4.2' (ECDSA) to the list of known hosts.
root@192.168.4.2's password:
Linux cloud-hypervisor 5.2.0 #2 SMP Thu Jul 11 08:08:16 CEST 2019 x86_64
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Fri Jul 12 13:27:56 2019 from 192.168.4.1
root@guest:~#
```
## Internet connectivity
To enable internet connectivity a default gw and a nameserver has to be set within
the virtual machine:
```bash
root@guest:~# ip route add default via 192.168.4.1
root@guest:~# cat /etc/resolv.conf
options timeout:2
domain vallis.nl
search vallis.nl
nameserver 192.168.178.1
```
make sure that the default gateway of the hypervisor host (in this example host 192.168.178.1 which is an adsl router) has an entry in the routing table for the 192.168.4.0/24 network otherwise IP connectivity will not work.
If profiling with a network device attached either the TAP device must be already created and configured or the profiling must be done as root so that the TAP device can be created.
## Userspace only profiling with LBR
The use of LBR (Last Branch Record; available since Haswell) offers lower
overhead if only userspace profiling is required. This lower overhead can allow
a higher frequency of sampling. This also removes the requirement to compile
with custom `RUSTFLAGS` however debug symbols should still be included:
e.g.
```
$ perf record --call-graph lbr --all-user --user-callchains -g target/release/cloud-hypervisor \
This document provides guidance to users, downstream maintainers and
any other consumers of the Cloud Hypervisor project, this document
describes the release process, release cadence, stability expectations and
related topics.
## Basic Terms
### Stability
For Cloud Hypervisor the following areas are subject to stability guarantees:
- [REST API](api.md#rest-api)
- [Command line options](api.md#command-line-interface)
- [Device Model](device_model.md)
- Device tree, device list, ACPI, Hyper-V enlightenments and any other
features exposed to guest
- KVM compatibility
- Rust edition compatibility
This list is incomplete but this document serves as a best effort guide to stability
across releases.
### Experimental features
Experimental features are under active development and no guarantees are made about their stability.
List of experimental features:
- TDX
- vfio-user
- vDPA
### Security
Security fixes should be included in a new point release.
For security issues an advisory will be published via the GitHub security advisory process along with the release. Watching the project on GitHub will notify you of those issues.
## Releases
### Versioning
The versioning scheme uses `MAJOR.POINT` pattern:
-`MAJOR` can introduce incompatible changes along with support for new features. Changes to the [API](api.md#rest-api),
[CLI options](api.md#command-line-interface) and [device model](device_model.md)
require a notice at least 2 releases in advance for the actual change to take
Cloud Hypervisor is under active development. A new major release is issued approximately
every 6 weeks. Point releases are issued on demand, when important bug fixes are in
the queue. A major release would receive bug fixes for the next two cycles (~12 weeks)
and then be considered EOL.
```
+ - Active release support
E - EOL
2021 2022 2023
| | | | | | | | |
18.0 | | | ++++++++E
19.0 | | | |++++++++E
20.0 | | | | ++++++++E
21.0 | | | | | ++++++++E
22.0 | | | | | +++++++++E
23.0 | | | | | | +++++++++E
```
### Major Release Stability Considerations
Snapshot/restore support is not compatible across `MAJOR` versions.
Live migration support is not compatible across `MAJOR` versions.
### LTS Release Cadence
A regular release is promoted to LTS every 12 months. An LTS release is supported for 18 months. This gives a 6 months window for users to move to the new LTS.
Cloud Hypervisor has a basic tracing infrastucture, particularly focussed on
the tracing of the initial VM setup.
## Usage
To enabling tracing, build with "tracing" feature. When compiled without the
feature the tracing is compiled out.
```bash
cargo build --features "tracing"
```
And then run Cloud Hypervisor as you wish, the trace will be written to the current directory as `cloud-hypervisor-<pid>.trace`. This is JSON file which you can inspect yourself.
Alternatively you can use the provided script in
`scripts/ch-trace-visualiser.py` to generate an SVG:
After the successful build, the resulting firmware binaries are available under `Build/OvmfCh/DEBUG_GCC5/FV` underneath the edk2 checkout.
After the successful build, the resulting firmware binaries are available under `Build/CloudHvX64/DEBUG_GCC5/FV` underneath the edk2 checkout.
## Using OVMF Binaries
Any UEFI capable image can be booted using the Cloud Hypervisor specific firmware. Windows guests under Cloud Hypervisor only support UEFI boot, therefore OVMF is mandatory there.
To make Cloud Hypervisor use UEFI boot, pass the `OVMF.fd` file path as an argument to the `--kernel` option. The firmware file will be opened in read only mode.
The same firmware can be used with Cloud Hypervisor or with QEMU. This is particularly useful if using QEMU for the preparation phase.
## Building UEFI Firmware with Compatibility Support Module (CSM)
CSM is a module that allows to boot legacy operating systems using the OVMF firmware. OVMF can embed a CSM build of SeaBIOS. To build the SeaBIOS with CSM support, add `CONFIG_CSM=y` to `.config` before the build. The outcome `out/Csm16.bin` is to be moved into `OvmfPkg/Csm/Csm16/Csm16.bin` before OVMF is built. Then, the OVMF build will have to be passed the `-D CSM_ENABLE` option in order to generate a legacy aware UEFI firmware. At the current stage, all the necessary patches are included in the Cloud Hypervisor specific [SeaBIOS branch](https://github.com/cloud-hypervisor/seabios/tree/ch). Taking into account the previous instructions, the modified command sequence to compile an OVMF binary with CSM support is the following one:
Please note, that the CSM support has currently only been tested with Linux guests. There are no plans to provide legacy support for other OSes (e.g. Windows).
To make Cloud Hypervisor use UEFI boot, pass the `CLOUDHV.fd` file path as an argument to the `--kernel` option. The firmware file will be opened in read only mode.
VSOCK provides a way for guest and host to communicate through a socket. VSOCK sockets support both stream and datagram types.
The `virtio-vsock` is based on the [Firecracker](https://github.com/firecracker-microvm/firecracker/blob/main/docs/vsock.md) implementation, where additional details can be found.
## What is a CID?
CID is a 32-bit context identifier describing the source or destination. In combination with the port, the complete addressing can be achieved to describe multiple listeners running on the same machine.
The table below depicts the well known CID values:
| CID | Description |
|-----|-------------|
| -1 | Random CID |
| 0 | Hypervisor |
| 1 | Loopback |
| 2 | Host |
## Prerequisites
### Kernel Requirements
Host kernel: CONFIG_VHOST_VSOCK
Guest kernel: CONFIG_VIRTIO_VSOCKETS
### Nested VM support
Linux __v5.5__ or newer is required for the L1 VM.
### Loopback support
Linux __v5.6__ or newer is required.
## Establishing VSOCK Connection
VSOCK device becomes available with `--vsock` option passed by the VM start. Cloud Hypervisor can be invoked for instance as below:
```bash
cloud-hypervisor \
--cpus boot=1\
--memory size=4G \
--firmware CLOUDHV.fd \
--disk path=jammy-server-cloudimg.raw \
--vsock cid=3,socket=/tmp/ch.vsock
```
The examples use __socat__`>=1.7.4` to illustrate the VSOCK functionality. However, there are other tools supporting VSOCK, like [ncat](https://stefano-garzarella.github.io/posts/2019-11-08-kvmforum-2019-vsock/).
### Connecting from Host to Guest
The host starts to listen on the defined port:
`$ socat - VSOCK-LISTEN:1234`
Once the host is listening, the guest can send data:
`echo -e "CONNECT 1234\\nHello from host!" | socat - UNIX-CONNECT:/tmp/ch.vsock
Note the string `CONNECT <port>` prepended to the actual data. It is possible for the guest to start listening on different ports, thus the specific command is needed to instruct VSOCK to which listener the host wants to connect. It needs to be sent once per connection. Once the connection established, data transfers can take place directly.
### Connecting from Guest to Host
This first requires a listening UNIX socket on the host side. The UNIX socket path has to be constructed by using the socket path used at the VM launch time with appended `_` and the port number to be used on the guest side. As in the example above, if we'd intended to connect from the guest to the port `1234`, the Unix socket path on the host side would be `/tmp/ch.vsock_1234`.
Also note that the CID used on the guest side is the well known CID value `2`.
Listening on the host side:
`$ socat - UNIX-LISTEN:/tmp/ch.vsock_1234`
From the guest:
`$ echo -e "Hello from guest!" | socat - VSOCK-CONNECT:2:1234`
## Links
- [virtio-vsock in QEMU, Firecracker and Linux: Status, Performance and Challenges](https://kvmforum2019.sched.com/event/TmwK)
- [Leveraging virtio-vsock in the cloud and containers](https://archive.fosdem.org/2021/schedule/event/vai_virtio_vsock/)
- [VSOCK man page](https://manpages.ubuntu.com/manpages/focal/man7/vsock.7.html)
- Suitable firmware for Cloud Hypervisor (`CLOUDHV.fd`) and for QEMU (`OVMF.fd`)
- With the suggested image size of 30G, there should be enough free disk space to hold the installation ISO and any other necessary files
This step currently requires QEMU to install Windows onto the guest. QEMU is only used at the preparation stage, the resulting image is then fully functional with Cloud Hypervisor.
@@ -67,7 +67,7 @@ The basic command to boot a Windows image. The configuration section should be c
```shell
cloud-hypervisor \
--kernel ./$OVMF_DIR/OVMF.fd \
--kernel ./$OVMF_DIR/CLOUDHV.fd \
--disk path=./$IMG_FILE\
--cpus boot=1,kvm_hyperv=on \
--memory size=4G \
@@ -131,7 +131,7 @@ See also the [links](#Links) section for a more extended SAC documentation.
## Network
This section illustrates the Windows specific corner points for the VM network configuration. For the extended networking guide, including bridging for multiple VMs, follow [networking.md](networking.md).
This section illustrates the Windows specific aspects of the VM network configuration.
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