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[v4,12/31] i386/sev: Don't return launch measurements for SEV-SNP guests

Message ID 20240530111643.1091816-13-pankaj.gupta@amd.com (mailing list archive)
State New, archived
Headers show
Series Add AMD Secure Nested Paging (SEV-SNP) support | expand

Commit Message

Gupta, Pankaj May 30, 2024, 11:16 a.m. UTC 
From: Michael Roth <michael.roth@amd.com>

For SEV-SNP guests, launch measurement is queried from within the guest
during attestation, so don't attempt to return it as part of
query-sev-launch-measure.

Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@amd.com>
---
 target/i386/sev.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/target/i386/sev.c b/target/i386/sev.c
index 56c1cce8e7..458ff5040d 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -803,7 +803,9 @@  sev_launch_get_measure(Notifier *notifier, void *unused)
 
 static char *sev_get_launch_measurement(void)
 {
-    SevGuestState *sev_guest = SEV_GUEST(MACHINE(qdev_get_machine())->cgs);
+    ConfidentialGuestSupport *cgs = MACHINE(qdev_get_machine())->cgs;
+    SevGuestState *sev_guest =
+        (SevGuestState *)object_dynamic_cast(OBJECT(cgs), TYPE_SEV_GUEST);
 
     if (sev_guest &&
         SEV_COMMON(sev_guest)->state >= SEV_STATE_LAUNCH_SECRET) {