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Merge remote-tracking branch 'sstabellini/saverestore-8' into staging

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* sstabellini/saverestore-8:
  xen: do not allocate RAM during INMIGRATE runstate
  xen mapcache: check if memory region has moved.
  xen: record physmap changes to xenstore
  Set runstate to INMIGRATE earlier
  Introduce "xen-save-devices-state"
  cirrus_vga: do not reset videoram

Conflicts:
	qapi-schema.json

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2012-03-19 13:39:42 -05:00
commit 33cf629a37
9 changed files with 278 additions and 12 deletions
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34
docs/xen-save-devices-state.txt Normal file
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= Save Devices =
QEMU has code to load/save the state of the guest that it is running.
These are two complementary operations. Saving the state just does
that, saves the state for each device that the guest is running.
These operations are normally used with migration (see migration.txt),
however it is also possible to save the state of all devices to file,
without saving the RAM or the block devices of the VM.
This operation is called "xen-save-devices-state" (see
QMP/qmp-commands.txt)
The binary format used in the file is the following:
-------------------------------------------
32 bit big endian: QEMU_VM_FILE_MAGIC
32 bit big endian: QEMU_VM_FILE_VERSION
for_each_device
{
8 bit: QEMU_VM_SECTION_FULL
32 bit big endian: section_id
8 bit: idstr (ID string) length
string: idstr (ID string)
32 bit big endian: instance_id
32 bit big endian: version_id
buffer: device specific data
}
8 bit: QEMU_VM_EOF