kvm: vmx: Set IA32_TSC_AUX for legacy mode guests

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commit 0023ef39dc upstream.

RDTSCP is supported in legacy mode as well as long mode. The
IA32_TSC_AUX MSR should be set to the correct guest value before
entering any guest that supports RDTSCP.

Fixes: 4e47c7a6d7 ("KVM: VMX: Add instruction rdtscp support for guest")
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Reviewed-by: Marc Orr <marcorr@google.com>
Reviewed-by: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[bwh: Backported to 3.16:
 - Keep testing vmx->rdtscp_enabled instead of guest_cpuid_has()
 - Adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Jim Mattson 2018-12-05 15:28:58 -08:00 • committed by Ben Hutchings

parent a3777d9caf

commit f6491fdd2c

1 changed files with 3 additions and 3 deletions

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arch/x86/kvm/vmx.c

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