diff options
| author | Sean Christopherson <seanjc@google.com> | 2024-04-23 15:15:19 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2024-06-03 08:58:54 -0700 |
| commit | 52c47f5897b69cdde0d23e5102b44eb161fa70a8 (patch) | |
| tree | 9e22ac3388d6527ea5c0d9cd078f6859e13c2e8d | |
| parent | 7974c0643ee3b493d5a3f2a1ee25e9ddb53283c3 (diff) | |
KVM: SVM: Use KVM's snapshot of the host's XCR0 for SEV-ES host state
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).
Link: https://lore.kernel.org/r/20240423221521.2923759-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | arch/x86/kvm/svm/sev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 0435fab4f536..e327b37f78e4 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -3322,7 +3322,7 @@ 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; |