linux/arch/x86/hyperv
Anirudh Rayabharam 2982635a0b x86/hyperv: fix invalid writes to MSRs during root partition kexec
hyperv_cleanup resets the hypercall page by setting the MSR to 0. However,
the root partition is not allowed to write to the GPA bits of the MSR.
Instead, it uses the hypercall page provided by the MSR. Similar is the
case with the reference TSC MSR.

Clear only the enable bit instead of zeroing the entire MSR to make
the code valid for root partition too.

Signed-off-by: Anirudh Rayabharam <anrayabh@linux.microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20221027095729.1676394-3-anrayabh@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
2022-11-03 15:50:28 +00:00
..
hv_apic.c KVM: x86: lapic: Rename [GET/SET]_APIC_DEST_FIELD to [GET/SET]_XAPIC_DEST_FIELD 2022-06-24 12:44:34 -04:00
hv_init.c x86/hyperv: fix invalid writes to MSRs during root partition kexec 2022-11-03 15:50:28 +00:00
hv_proc.c drivers: hv: Create a consistent pattern for checking Hyper-V hypercall status 2021-04-21 09:49:19 +00:00
hv_spinlock.c x86/hyperv: Fix unused variable 'msr_val' warning in hv_qlock_wait 2021-03-24 11:31:04 +00:00
irqdomain.c genirq: Return a const cpumask from irq_data_get_affinity_mask 2022-07-07 09:38:04 +01:00
ivm.c x86/Hyper-V: Add SEV negotiate protocol support in Isolation VM 2022-06-15 18:27:40 +00:00
Makefile x86/hyperv: Add new hvcall guest address host visibility support 2021-10-28 11:21:33 +00:00
mmu.c x86/hyperv: Properly deal with empty cpumasks in hyperv_flush_tlb_multi() 2022-01-10 11:50:20 +00:00
nested.c drivers: hv: Create a consistent pattern for checking Hyper-V hypercall status 2021-04-21 09:49:19 +00:00