KVM: x86: Inject #GP on x2APIC WRMSR that sets reserved bits 63:32

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Reject attempts to set bits 63:32 for 32-bit x2APIC registers, i.e. all
x2APIC registers except ICR.  Per Intel's SDM:

  Non-zero writes (by WRMSR instruction) to reserved bits to these
  registers will raise a general protection fault exception

Opportunistically fix a typo in a nearby comment.

Reported-by: Marc Orr <marcorr@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Link: https://lore.kernel.org/r/20230107011025.565472-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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This commit is contained in:

Sean Christopherson 2023-01-07 01:10:21 +00:00

parent ba5838abb0

commit ab52be1b31

1 changed files with 5 additions and 1 deletions

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arch/x86/kvm/lapic.c

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