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KVM: x86: use correct page table format to check nested page table reserved bits
authorPaolo Bonzini <pbonzini@redhat.com>
Tue, 22 Sep 2015 21:02:14 +0000 (23:02 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Fri, 25 Sep 2015 08:31:28 +0000 (10:31 +0200)
commit6fec21449a62702a582cecbb0b351363e039c95e
treeef62742a58747275e7d852dec6fdc8526a4f14fdtree | snapshot (tar.gz zip)
parent79a8059d244e99454e474902e4325ee9b50e9178commit | diff
KVM: x86: use correct page table format to check nested page table reserved bits

Intel CPUID on AMD host or vice versa is a weird case, but it can
happen.  Handle it by checking the host CPU vendor instead of the
guest's in reset_tdp_shadow_zero_bits_mask.  For speed, the
check uses the fact that Intel EPT has an X (executable) bit while
AMD NPT has NX.

Reported-by: Borislav Petkov <bp@alien8.de>
Tested-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/mmu.c diff | blob | blame | history