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arch: x86_64: Don't expose TSC deadline timer for MSHV guests

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HV APIC(i.e., synthetic APIC controller exposed by Microsoft Hypervisor)
does not support one-shot operation using a TSC deadline value. Due to
which we see the following backtrace inside the guest when running with
hypervisor-fw/OVMF:

[    0.560765] unchecked MSR access error: WRMSR to 0x832 (tried to
write 0x00000000000400ec) at rIP: 0xffffffff8f473594
(native_write_msr+0x4/0x30)
[    0.560765] Call Trace:
[    0.560765]  ? native_apic_msr_write+0x2b/0x30
[    0.560765]  __setup_APIC_LVTT+0xbc/0xe0
[    0.560765]  lapic_timer_set_oneshot+0x27/0x30
[    0.560765]  clockevents_switch_state+0xaf/0xf0
[    0.560765]  tick_setup_periodic+0x47/0x90
[    0.560765]  tick_setup_device.isra.0+0x7c/0x110
[    0.560765]  tick_check_new_device+0xce/0xf0
[    0.560765]  clockevents_register_device+0x82/0x170
[    0.560765]  clockevents_config_and_register+0x2f/0x40
[    0.560765]  setup_APIC_timer+0xe1/0xf0
[    0.560765]  setup_boot_APIC_clock+0x5f/0x66
[    0.560765]  native_smp_prepare_cpus+0x1d6/0x286
[    0.560765]  kernel_init_freeable+0xcf/0x255
[    0.560765]  ? rest_init+0xb0/0xb0
[    0.560765]  kernel_init+0xe/0x110
[    0.560765]  ret_from_fork+0x22/0x40

Also, if this feature is exposed guest would not finish booting and get
stuck right before unpacking the root filesystem.

Fixes: 06e8d1c40 ("hypervisor: mshv: fix topology for Intel HW on MSHV")
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
This commit is contained in:
Jinank Jain
2024-07-17 17:39:01 +05:30
committed by Liu Wei
parent efb92d409f
commit c1f18fa634
3 changed files with 29 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files
vmm/Cargo.toml
+8 -2
View File
@@ -7,11 +7,17 @@ version = "0.1.0"
[features]
dbus_api = ["blocking", "futures", "zbus"]
default = []
dhat-heap = ["dhat"] # For heap profiling
dhat-heap = ["dhat"] # For heap profiling
guest_debug = ["gdbstub", "gdbstub_arch", "kvm"]
igvm = ["dep:igvm", "hex", "igvm_defs", "mshv-bindings", "range_map_vec"]
io_uring = ["block/io_uring"]
kvm = ["hypervisor/kvm", "pci/kvm", "vfio-ioctls/kvm", "vm-device/kvm"]
kvm = [
"arch/kvm",
"hypervisor/kvm",
"pci/kvm",
"vfio-ioctls/kvm",
"vm-device/kvm",
]
mshv = ["hypervisor/mshv", "pci/mshv", "vfio-ioctls/mshv", "vm-device/mshv"]
sev_snp = ["arch/sev_snp", "hypervisor/sev_snp", "virtio-devices/sev_snp"]
tdx = ["arch/tdx", "hypervisor/tdx"]