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kvm: vmx: Raise #UD on unsupported XSAVES/XRSTORS
authorPaolo Bonzini <pbonzini@redhat.com>
Thu, 24 Aug 2017 12:48:03 +0000 (14:48 +0200)
committerPaolo Bonzini <pbonzini@redhat.com>
Thu, 24 Aug 2017 16:09:13 +0000 (18:09 +0200)
commit3db134805c69aae16ba6193946aa8deccd393ead
treee9cb104b81f6b3f3c9d2a1a22e3151bf7f133264tree
parent75f4fc8da9bd3b56f08ff8ba4113e5c57a85c24ccommit | diff
kvm: vmx: Raise #UD on unsupported XSAVES/XRSTORS

A guest may not be configured to support XSAVES/XRSTORS, even when the host
does. If the guest does not support XSAVES/XRSTORS, clear the secondary
execution control so that the processor will raise #UD.

Also clear the "allowed-1" bit for XSAVES/XRSTORS exiting in the
IA32_VMX_PROCBASED_CTLS2 MSR, and pass through VMCS12's control in
the VMCS02.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/vmx.c diff | blob | history
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