diff options
| author | Jim Mattson <jmattson@google.com> | 2018-12-06 02:28:58 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-12-14 19:59:47 +0300 |
| commit | 0023ef39dc35c773c436eaa46ca539a26b308b55 (patch) | |
| tree | c99dd34213bf281b795b199c36adafc3d0d85c42 /arch/x86/kvm/vmx | |
| parent | 55d2375e58a61be072431dd3d3c8a320f4a4a01b (diff) | |
| download | linux-0023ef39dc35c773c436eaa46ca539a26b308b55.tar.xz | |
kvm: vmx: Set IA32_TSC_AUX for legacy mode guests
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: 4e47c7a6d714 ("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>
Diffstat (limited to 'arch/x86/kvm/vmx')
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 47943d073d6d..c1feb62faac4 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1382,9 +1382,6 @@ static void setup_msrs(struct vcpu_vmx *vmx) index = __find_msr_index(vmx, MSR_CSTAR); if (index >= 0) move_msr_up(vmx, index, save_nmsrs++); - index = __find_msr_index(vmx, MSR_TSC_AUX); - if (index >= 0 && guest_cpuid_has(&vmx->vcpu, X86_FEATURE_RDTSCP)) - move_msr_up(vmx, index, save_nmsrs++); /* * MSR_STAR is only needed on long mode guests, and only * if efer.sce is enabled. @@ -1397,6 +1394,9 @@ static void setup_msrs(struct vcpu_vmx *vmx) index = __find_msr_index(vmx, MSR_EFER); if (index >= 0 && update_transition_efer(vmx, index)) move_msr_up(vmx, index, save_nmsrs++); + index = __find_msr_index(vmx, MSR_TSC_AUX); + if (index >= 0 && guest_cpuid_has(&vmx->vcpu, X86_FEATURE_RDTSCP)) + move_msr_up(vmx, index, save_nmsrs++); vmx->save_nmsrs = save_nmsrs; vmx->guest_msrs_dirty = true; |