KVM: x86: use CPUID to locate host page table reserved bits

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commit 7adacf5eb2 upstream.

The comment in kvm_get_shadow_phys_bits refers to MKTME, but the same is actually
true of SME and SEV.  Just use CPUID[0x8000_0008].EAX[7:0] unconditionally if
available, it is simplest and works even if memory is not encrypted.

Cc: stable@vger.kernel.org
Reported-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Paolo Bonzini 2019-12-04 15:50:27 +01:00 • committed by Greg Kroah-Hartman

parent 06b3410789

commit c6a896bb83

1 changed files with 12 additions and 8 deletions

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arch/x86/kvm/mmu/mmu.c

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