[for-6.0 v5 11/13] spapr: PEF: prevent migration

[David Gibson]

We haven't yet implemented the fairly involved handshaking that will be
needed to migrate PEF protected guests.  For now, just use a migration
blocker so we get a meaningful error if someone attempts this (this is the
same approach used by AMD SEV).

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 hw/ppc/pef.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/hw/ppc/pef.c b/hw/ppc/pef.c
index 3ae3059cfe..edc3e744ba 100644
--- a/hw/ppc/pef.c
+++ b/hw/ppc/pef.c
@@ -38,7 +38,11 @@ struct PefGuestState {
 };
 
 #ifdef CONFIG_KVM
+static Error *pef_mig_blocker;
+
 static int kvmppc_svm_init(Error **errp)
+
+int kvmppc_svm_init(SecurableGuestMemory *sgm, Error **errp)
 {
     if (!kvm_check_extension(kvm_state, KVM_CAP_PPC_SECURABLE_GUEST)) {
         error_setg(errp,
@@ -54,6 +58,11 @@ static int kvmppc_svm_init(Error **errp)
         }
     }
 
+    /* add migration blocker */
+    error_setg(&pef_mig_blocker, "PEF: Migration is not implemented");
+    /* NB: This can fail if --only-migratable is used */
+    migrate_add_blocker(pef_mig_blocker, &error_fatal);
+
     return 0;
 }
 
-- 
2.28.0