Use KVM's snapshot of the host's XCR0 when stuffing SEV-ES host state instead of reading XCR0 from hardware. XCR0 is only written during boot, i.e. won't change while KVM is running (and KVM at large is hosed if that doesn't hold true). Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> --- arch/x86/kvm/svm/sev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 71f1518f0ca1..c56070991a58 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -3249,7 +3249,7 @@ void sev_es_prepare_switch_to_guest(struct vcpu_svm *svm, struct sev_es_save_are * isn't saved by VMRUN, that isn't already saved by VMSAVE (performed * by common SVM code). */ - hostsa->xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); + hostsa->xcr0 = kvm_host.xcr0; hostsa->pkru = read_pkru(); hostsa->xss = kvm_host.xss; -- 2.44.0.769.g3c40516874-goog
