3 QEMU has code to load/save the state of the guest that it is running.
4 These are two complementary operations. Saving the state just does
5 that, saves the state for each device that the guest is running.
7 These operations are normally used with migration (see migration.txt),
8 however it is also possible to save the state of all devices to file,
9 without saving the RAM or the block devices of the VM.
11 This operation is called "xen-save-devices-state" (see
15 The binary format used in the file is the following:
18 -------------------------------------------
20 32 bit big endian: QEMU_VM_FILE_MAGIC
21 32 bit big endian: QEMU_VM_FILE_VERSION
25 8 bit: QEMU_VM_SECTION_FULL
26 32 bit big endian: section_id
27 8 bit: idstr (ID string) length
28 string: idstr (ID string)
29 32 bit big endian: instance_id
30 32 bit big endian: version_id
31 buffer: device specific data