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Move Cloud Hypervisor to virtio-queue crate

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Relying on the vm-virtio/virtio-queue crate from rust-vmm which has been
copied inside the Cloud Hypervisor tree, the entire codebase is moved to
the new definition of a Queue and other related structures.

The reason for this move is to follow the upstream until we get some
agreement for the patches that we need on top of that to make it
properly work with Cloud Hypervisor.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2021-10-21 12:41:16 +02:00
parent 7c19ae92b8
commit 0249e8641a
44 changed files with 936 additions and 1652 deletions
Download Patch File Download Diff File Expand all files Collapse all files
virtio-devices/src/rng.rs
+16 -20
View File
@@ -4,8 +4,8 @@
use super::Error as DeviceError;
use super::{
ActivateError, ActivateResult, EpollHelper, EpollHelperError, EpollHelperHandler, Queue,
VirtioCommon, VirtioDevice, VirtioDeviceType, EPOLL_HELPER_EVENT_LAST, VIRTIO_F_IOMMU_PLATFORM,
ActivateError, ActivateResult, EpollHelper, EpollHelperError, EpollHelperHandler, VirtioCommon,
VirtioDevice, VirtioDeviceType, EPOLL_HELPER_EVENT_LAST, VIRTIO_F_IOMMU_PLATFORM,
VIRTIO_F_VERSION_1,
};
use crate::seccomp_filters::Thread;
@@ -21,7 +21,8 @@ use std::sync::atomic::AtomicBool;
use std::sync::{Arc, Barrier};
use versionize::{VersionMap, Versionize, VersionizeResult};
use versionize_derive::Versionize;
use vm_memory::{Bytes, GuestAddressSpace, GuestMemoryAtomic};
use virtio_queue::Queue;
use vm_memory::{Bytes, GuestMemoryAtomic};
use vm_migration::VersionMapped;
use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
use vmm_sys_util::eventfd::EventFd;
@@ -33,8 +34,7 @@ const QUEUE_SIZES: &[u16] = &[QUEUE_SIZE];
const QUEUE_AVAIL_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 1;
struct RngEpollHandler {
queues: Vec<Queue>,
mem: GuestMemoryAtomic<GuestMemoryMmap>,
queues: Vec<Queue<GuestMemoryAtomic<GuestMemoryMmap>>>,
random_file: File,
interrupt_cb: Arc<dyn VirtioInterrupt>,
queue_evt: EventFd,
@@ -48,31 +48,28 @@ impl RngEpollHandler {
let mut used_desc_heads = [(0, 0); QUEUE_SIZE as usize];
let mut used_count = 0;
let mem = self.mem.memory();
for avail_desc in queue.iter(&mem) {
for mut desc_chain in queue.iter().unwrap() {
let desc = desc_chain.next().unwrap();
let mut len = 0;
// Drivers can only read from the random device.
if avail_desc.is_write_only() {
if desc.is_write_only() {
// Fill the read with data from the random device on the host.
if mem
.read_from(
avail_desc.addr,
&mut self.random_file,
avail_desc.len as usize,
)
if desc_chain
.memory()
.read_from(desc.addr(), &mut self.random_file, desc.len() as usize)
.is_ok()
{
len = avail_desc.len;
len = desc.len();
}
}
used_desc_heads[used_count] = (avail_desc.index, len);
used_desc_heads[used_count] = (desc_chain.head_index(), len);
used_count += 1;
}
for &(desc_index, len) in &used_desc_heads[..used_count] {
queue.add_used(&mem, desc_index, len);
queue.add_used(desc_index, len).unwrap();
}
used_count > 0
}
@@ -213,9 +210,9 @@ impl VirtioDevice for Rng {
fn activate(
&mut self,
mem: GuestMemoryAtomic<GuestMemoryMmap>,
_mem: GuestMemoryAtomic<GuestMemoryMmap>,
interrupt_cb: Arc<dyn VirtioInterrupt>,
queues: Vec<Queue>,
queues: Vec<Queue<GuestMemoryAtomic<GuestMemoryMmap>>>,
mut queue_evts: Vec<EventFd>,
) -> ActivateResult {
self.common.activate(&queues, &queue_evts, &interrupt_cb)?;
@@ -228,7 +225,6 @@ impl VirtioDevice for Rng {
})?;
let mut handler = RngEpollHandler {
queues,
mem,
random_file,
interrupt_cb,
queue_evt: queue_evts.remove(0),