1 files changed, 22 insertions, 0 deletions
diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c
index f7a549f650e9..7669aafcad95 100644
--- a/arch/x86/coco/sev/core.c
+++ b/arch/x86/coco/sev/core.c
@@ -1108,6 +1108,28 @@ int __init sev_es_efi_map_ghcbs_cas(pgd_t *pgd)
 	return 0;
 }
 
+enum es_result savic_register_gpa(u64 gpa)
+{
+	struct ghcb_state state;
+	struct es_em_ctxt ctxt;
+	enum es_result res;
+	struct ghcb *ghcb;
+
+	guard(irqsave)();
+
+	ghcb = __sev_get_ghcb(&state);
+	vc_ghcb_invalidate(ghcb);
+
+	ghcb_set_rax(ghcb, SVM_VMGEXIT_SAVIC_SELF_GPA);
+	ghcb_set_rbx(ghcb, gpa);
+	res = sev_es_ghcb_hv_call(ghcb, &ctxt, SVM_VMGEXIT_SAVIC,
+				  SVM_VMGEXIT_SAVIC_REGISTER_GPA, 0);
+
+	__sev_put_ghcb(&state);
+
+	return res;
+}
+
 static void snp_register_per_cpu_ghcb(void)
 {
 	struct sev_es_runtime_data *data;