x86/sev-es: Invalidate the GHCB after completing VMGEXIT

[linux-2.6-microblaze.git] / arch / x86 / kernel / sev.c

diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c
index 45e2126..4fa111b 100644 (file)
--- a/arch/x86/kernel/sev.c
+++ b/arch/x86/kernel/sev.c
@@ -457,6 +457,11 @@ static __always_inline void sev_es_put_ghcb(struct ghcb_state *state)
                data->backup_ghcb_active = false;
                state->ghcb = NULL;
        } else {
+               /*
+                * Invalidate the GHCB so a VMGEXIT instruction issued
+                * from userspace won't appear to be valid.
+                */
+               vc_ghcb_invalidate(ghcb);
                data->ghcb_active = false;
        }
 }