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authorDavid Hildenbrand <dahi@linux.vnet.ibm.com>2016-06-09 15:36:41 +0200
committerCornelia Huck <cornelia.huck@de.ibm.com>2016-07-11 09:48:05 +0200
commitbb0995468a39f14077ceaa8ed5afdca849f00c7c (patch)
tree00eca39955df1afabc8db435acdd50ce7b8fc69d /hw
parente468b6730cb36a475fd4e71f57b020ca37ebd8ae (diff)
s390x/ipl: fix reboots for migration from different bios
When migrating from a different QEMU version, the start_address and bios_start_address may differ. During migration these values are migrated and overwrite the values that were detected by QEMU itself. On a reboot, QEMU will reload its own BIOS, but use the migrated start addresses, which does not work if the values differ. Fix this by not relying on the migrated values anymore, but still provide them during migration, so existing QEMUs continue to work. Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Cc: qemu-stable@nongnu.org Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'hw')
-rw-r--r--hw/s390x/ipl.c11
-rw-r--r--hw/s390x/ipl.h2
2 files changed, 11 insertions, 2 deletions
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c
index 78998cdbad..a54284c74a 100644
--- a/hw/s390x/ipl.c
+++ b/hw/s390x/ipl.c
@@ -69,8 +69,8 @@ static const VMStateDescription vmstate_ipl = {
.version_id = 0,
.minimum_version_id = 0,
.fields = (VMStateField[]) {
- VMSTATE_UINT64(start_addr, S390IPLState),
- VMSTATE_UINT64(bios_start_addr, S390IPLState),
+ VMSTATE_UINT64(compat_start_addr, S390IPLState),
+ VMSTATE_UINT64(compat_bios_start_addr, S390IPLState),
VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock),
VMSTATE_BOOL(iplb_valid, S390IPLState),
VMSTATE_UINT8(cssid, S390IPLState),
@@ -192,6 +192,13 @@ static void s390_ipl_realize(DeviceState *dev, Error **errp)
stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size);
}
}
+ /*
+ * Don't ever use the migrated values, they could come from a different
+ * BIOS and therefore don't work. But still migrate the values, so
+ * QEMUs relying on it don't break.
+ */
+ ipl->compat_start_addr = ipl->start_addr;
+ ipl->compat_bios_start_addr = ipl->bios_start_addr;
qemu_register_reset(qdev_reset_all_fn, dev);
error:
error_propagate(errp, err);
diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h
index ed3f2c8a43..c89109585a 100644
--- a/hw/s390x/ipl.h
+++ b/hw/s390x/ipl.h
@@ -93,7 +93,9 @@ struct S390IPLState {
/*< private >*/
DeviceState parent_obj;
uint64_t start_addr;
+ uint64_t compat_start_addr;
uint64_t bios_start_addr;
+ uint64_t compat_bios_start_addr;
bool enforce_bios;
IplParameterBlock iplb;
bool iplb_valid;