kvm: vmx: Raise #UD on unsupported RDRAND

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A guest may not be configured to support RDRAND, even when the host
does. If the guest does not support RDRAND, intercept the instruction
and synthesize #UD. Also clear the "allowed-1" bit for RDRAND exiting
in the IA32_VMX_PROCBASED_CTLS2 MSR.

Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Jim Mattson 2017-08-23 16:32:04 -07:00 • committed by Paolo Bonzini

parent 80154d77c9

commit 45ec368c9a

1 changed files with 30 additions and 1 deletions

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arch/x86/kvm/vmx.c

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