spapr: disable vmdesc submission for old machines
commitcba0e7796be18f61f43e60bff6bff986851e359a
authorGreg Kurz <gkurz@linux.vnet.ibm.com>
Tue, 23 Feb 2016 16:47:59 +0000 (23 17:47 +0100)
committerDavid Gibson <david@gibson.dropbear.id.au>
Sun, 28 Feb 2016 05:19:02 +0000 (28 16:19 +1100)
tree00c81f9f62b8bb5f245a35f2d0eba87e8fff22a5
parentce266b75febdeee5b91ab630a7158ddff3e002fb
spapr: disable vmdesc submission for old machines

Since QEMU 2.3, we have a vmdesc section in the migration stream.
This section is not mandatory but when migrating a pseries-2.2
machine from QEMU 2.2, you get a warning at the destination:

qemu-system-ppc64: Expected vmdescription section, but got 0

The warning goes away if we decide to skip vmdesc as well for
older pseries, like it is already done for pc's.

This can only be observed with -cpu POWER7 because POWER8
cannot migrate from QEMU 2.2 to 2.3 (insns_flags2 mismatch).

Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
hw/ppc/spapr.c