KVM: x86: mask CPUID(0xD,0x1).EAX against host value

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commit 316314cae1 upstream.

This ensures that the guest doesn't see XSAVE extensions
(e.g. xgetbv1 or xsavec) that the host lacks.

Cc: stable@vger.kernel.org
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
[4.5 does have CPUID_D_1_EAX, but earlier kernels don't, so use
 the numeric value.  This is consistent with other occurrences
 of cpuid_mask in arch/x86/kvm/cpuid.c - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Paolo Bonzini 2016-03-21 12:33:00 +01:00 • committed by Greg Kroah-Hartman

parent a6fa60f561

commit 039f0813ad

1 changed files with 1 additions and 0 deletions

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arch/x86/kvm/cpuid.c

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