KVM: nSVM: Check for NRIPS support before updating control field

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If hardware doesn't support DecodeAssist - a feature that provides
more information about the intercept in the VMCB, KVM decodes the
instruction and then updates the next_rip vmcb control field.
However, NRIP support itself depends on cpuid Fn8000_000A_EDX[NRIPS].
Since skip_emulated_instruction() doesn't verify nrip support
before accepting control.next_rip as valid, avoid writing this
field if support isn't present.

Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Bandan Das 2015-06-11 02:05:33 -04:00 • committed by Paolo Bonzini

parent 0b8ba4a2b6

commit f104765b4f

1 changed files with 6 additions and 2 deletions

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arch/x86/kvm/svm.c

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