Re: [Qemu-devel] [RFC PATCH v4 20/20] migration: disable save/restore and migration when SEV is active

[Brijesh Singh]

On 03/08/2017 03:32 PM, Eduardo Habkost wrote:
> On Wed, Mar 08, 2017 at 03:54:43PM -0500, Brijesh Singh wrote:
> > Snapshot, Restore and Migration is not implemented yet. Return error when
> > user tries to perform any of these operations.
> >
> > Signed-off-by: Brijesh Singh <address@hidden>
> > ---
> >  migration/migration.c |    7 +++++++
> >  migration/savevm.c    |   11 +++++++++++
> >  2 files changed, 18 insertions(+)
> >
> > diff --git a/migration/migration.c b/migration/migration.c
> > index 3dab684..287c72b 100644
> > --- a/migration/migration.c
> > +++ b/migration/migration.c
> > @@ -37,6 +37,7 @@
> >  #include "io/channel-buffer.h"
> >  #include "io/channel-tls.h"
> >  #include "migration/colo.h"
> > +#include "sysemu/sev.h"
> >
> >  #define MAX_THROTTLE  (32 << 20)      /* Migration transfer speed throttling */
> >
> > @@ -1221,6 +1222,12 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk,
> >          error_setg(errp, QERR_MIGRATION_ACTIVE);
> >          return;
> >      }
> > +
> > +    if (sev_enabled()) {
> > +        error_setg(errp, "Migration is not implemented");
> > +        return;
> > +    }
> > +
>
> You can do this more easily by registering a migration blocker
> using migrate_add_blocker() when initializing SEV.

Thanks for tip, I was not aware of migrate_add_blocker(), I will look at using 
in next rev.

-Brijesh