mirror of
https://github.com/yuzu-emu/unicorn
synced 2024-11-25 06:49:24 +00:00
35 lines
1,004 B
Text
35 lines
1,004 B
Text
|
= 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
|