Even though we got both the original CPU (used for starting a domain) and the updated version (the CPU really provided by QEMU) during incoming migration, restore, or snapshot revert, we still need to update the CPU according to the data we got from the freshly started QEMU. Otherwise we don't know whether the CPU we got from QEMU matches the one before migration. We just need to keep the original CPU in priv->origCPU. Messed up by me in v3.4.0-58-g8e34f4781. Signed-off-by: Jiri Denemark <jdenemar(a)redhat.com&gt; --- src/qemu/qemu_process.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c index 63119396b..d669dfb32 100644 --- a/src/qemu/qemu_process.c +++ b/src/qemu/qemu_process.c @@ -3989,20 +3989,16 @@ qemuProcessUpdateLiveGuestCPU(virQEMUDriverPtr driver, if (qemuProcessVerifyCPUFeatures(def, cpu) < 0) goto cleanup; - /* Don't update the CPU if we already did so when starting a domain - * during migration, restore or snapshot revert. */ - if (priv->origCPU) { - ret = 0; - goto cleanup; - } - if (!(orig = virCPUDefCopy(def->cpu))) goto cleanup; if ((rc = virCPUUpdateLive(def->os.arch, def->cpu, cpu, disabled)) < 0) { goto cleanup; } else if (rc == 0) { - if (!virCPUDefIsEqual(def->cpu, orig, false)) + /* Store the original CPU in priv if QEMU changed it and we didn't + * get the original CPU via migration, restore, or snapshot revert. + */ + if (!priv->origCPU && !virCPUDefIsEqual(def->cpu, orig, false)) VIR_STEAL_PTR(priv->origCPU, orig); def->cpu->check = VIR_CPU_CHECK_FULL; -- 2.13.1