Jinank Jain c1f18fa634 arch: x86_64: Don't expose TSC deadline timer for MSHV guests ... 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>		2024-07-17 17:10:08 +00:00
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src	arch: x86_64: Don't expose TSC deadline timer for MSHV guests	2024-07-17 17:10:08 +00:00
Cargo.toml	arch: x86_64: Don't expose TSC deadline timer for MSHV guests	2024-07-17 17:10:08 +00:00