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spapr: PEF: prevent migration

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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>
Reviewed-by: Greg Kurz <groug@kaod.org>
This commit is contained in:
David Gibson 2020-06-04 15:24:27 +10:00
parent 6c8ebe30ea
commit 6742eefc93
1 changed files with 7 additions and 0 deletions
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7
hw/ppc/pef.c
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@ -44,6 +44,8 @@ struct PefGuest {
static int kvmppc_svm_init(Error **errp)
{
#ifdef CONFIG_KVM
static Error *pef_mig_blocker;
if (!kvm_check_extension(kvm_state, KVM_CAP_PPC_SECURE_GUEST)) {
error_setg(errp,
"KVM implementation does not support Secure VMs (is an ultravisor running?)");
@ -58,6 +60,11 @@ 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;
#else
g_assert_not_reached();