After a CPUID update, refresh the list of user return MSRs that are
loaded into hardware when running the vCPU. This is necessary to handle
the oddball case where userspace exposes X86_FEATURE_RDTSCP to the guest
after the vCPU is running.
Fixes: 0023ef39dc35 ("kvm: vmx: Set IA32_TSC_AUX for legacy mode guests")
Fixes: 4e47c7a6d714 ("KVM: VMX: Add instruction rdtscp support for guest")
Reviewed-by: Reiji Watanabe <reijiw@xxxxxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
arch/x86/kvm/vmx/vmx.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index d7a4db15a169..3045daa3ec30 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7159,6 +7159,8 @@ static void vmx_vcpu_after_set_cpuid(struct kvm_vcpu *vcpu)
/* xsaves_enabled is recomputed in vmx_compute_secondary_exec_control(). */
vcpu->arch.xsaves_enabled = false;
+ vmx_setup_uret_msrs(vmx);
+
if (cpu_has_secondary_exec_ctrls()) {
vmx_compute_secondary_exec_control(vmx);
vmcs_set_secondary_exec_control(vmx);
--
2.32.0.93.g670b81a890-goog
