[PATCH v14 25/22] [SQUASH] KVM: SEV: Add support to handle Page State Change VMGEXIT

[Michael Roth]

Report an error to guest if non-SNP attempts to issue GHCB-based Page
State Change.

Signed-off-by: Michael Roth <michael.roth@xxxxxxx>
---
 arch/x86/kvm/svm/sev.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 0d8fbd5e25fe..c00081248ffe 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -3289,7 +3289,11 @@ static int sev_es_validate_vmgexit(struct vcpu_svm *svm)
 	case SVM_VMGEXIT_AP_JUMP_TABLE:
 	case SVM_VMGEXIT_UNSUPPORTED_EVENT:
 	case SVM_VMGEXIT_HV_FEATURES:
+		break;
 	case SVM_VMGEXIT_PSC:
+		if (!sev_snp_guest(vcpu->kvm))
+			goto vmgexit_err;
+		break;
 	case SVM_VMGEXIT_TERM_REQUEST:
 	case SVM_VMGEXIT_GUEST_REQUEST:
 	case SVM_VMGEXIT_EXT_GUEST_REQUEST:
-- 
2.25.1