[v1] mostly i386 patches for 2024-06-04

[PULL 26/45] i386/sev: Don't return launch measurements for SEV-SNP guests

Paolo Bonzini posted 45 patches 5 months, 3 weeks ago

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Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Stefan Hajnoczi <stefanha@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Kevin Wolf <kwolf@redhat.com>, Hanna Reitz <hreitz@redhat.com>, Eduardo Habkost <eduardo@habkost.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Yanan Wang <wangyanan55@huawei.com>, Peter Xu <peterx@redhat.com>, David Hildenbrand <david@redhat.com>, Cornelia Huck <cohuck@redhat.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Thomas Huth <thuth@redhat.com>, Eric Blake <eblake@redhat.com>, Markus Armbruster <armbru@redhat.com>

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[PULL 26/45] i386/sev: Don't return launch measurements for SEV-SNP guests

Posted by Paolo Bonzini 5 months, 3 weeks ago

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>
Message-ID: <20240530111643.1091816-13-pankaj.gupta@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/sev.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/target/i386/sev.c b/target/i386/sev.c
index 6525b3c1a0e..c3daaf1ad50 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -795,7 +795,9 @@ 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) {
-- 
2.45.1