fridtjof/qemu-cr16
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

vfio: doc changes for cpr

Browse source 
Update documentation to say that cpr-transfer supports vfio and iommufd.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/qemu-devel/1751493538-202042-22-git-send-email-steven.sistare@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
This commit is contained in:
Steve Sistare 2025-07-02 14:58:58 -07:00 • committed by Cédric Le Goater
parent 99cedd5d55
commit 7437caad20
2 changed files with 6 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

5
docs/devel/migration/CPR.rst
View file

@ -152,8 +152,7 @@ cpr-transfer mode
This mode allows the user to transfer a guest to a new QEMU instance
on the same host with minimal guest pause time, by preserving guest
RAM in place, albeit with new virtual addresses in new QEMU. Devices
and their pinned memory pages will also be preserved in a future QEMU
release.
and their pinned memory pages are also preserved for VFIO and IOMMUFD.
The user starts new QEMU on the same host as old QEMU, with command-
line arguments to create the same machine, plus the ``-incoming``
@ -322,6 +321,6 @@ Futures
cpr-transfer mode is based on a capability to transfer open file
descriptors from old to new QEMU. In the future, descriptors for
vfio, iommufd, vhost, and char devices could be transferred,
vhost, and char devices could be transferred,
preserving those devices and their kernel state without interruption,
even if they do not explicitly support live migration.

6
qapi/migration.json
View file

@ -620,8 +620,10 @@
#
# @cpr-transfer: This mode allows the user to transfer a guest to a
# new QEMU instance on the same host with minimal guest pause
# time by preserving guest RAM in place. Devices and their pinned
# pages will also be preserved in a future QEMU release.
# time by preserving guest RAM in place.
#
# Devices and their pinned pages are also preserved for VFIO and
# IOMMUFD. (since 10.1)
#
# The user starts new QEMU on the same host as old QEMU, with
# command-line arguments to create the same machine, plus the