On Mon, Oct 17, 2022 at 02:06:19PM +0200, sebastien.boeuf@xxxxxxxxx wrote: > From: Sebastien Boeuf <sebastien.boeuf@xxxxxxxxx> > > This series introduces a new operation for vdpa devices. It allows them > to be resumed after they have been suspended. A new feature bit is > introduced for devices to advertise their ability to be resumed after > they have been suspended. This feature bit is different from the one > advertising the ability to be suspended, meaning a device that can be > suspended might not have the ability to be resumed. > > Even if it is already possible to restore a device that has been > suspended, which is very convenient for live migrating virtual machines, > there is a major drawback as the device must be fully reset. There is no > way to resume a device that has been suspended without having to > configure the device again and without having to recreate the IOMMU > mappings. This new operation aims at filling this gap by allowing the > device to resume processing the virtqueue descriptors without having to > reset it. This is particularly useful for performing virtual machine > offline migration, also called snapshot/restore, as it allows a virtual > machine to resume to a running state after it was paused and a snapshot > of the entire system was taken. > > Sebastien Boeuf (4): > vdpa: Add resume operation > vhost-vdpa: Introduce RESUME backend feature bit > vhost-vdpa: uAPI to resume the device > vdpa_sim: Implement resume vdpa op > > drivers/vdpa/vdpa_sim/vdpa_sim.c | 19 ++++++++++++++++++ > drivers/vhost/vdpa.c | 34 +++++++++++++++++++++++++++++++- > include/linux/vdpa.h | 6 +++++- > include/uapi/linux/vhost.h | 8 ++++++++ > include/uapi/linux/vhost_types.h | 2 ++ > 5 files changed, 67 insertions(+), 2 deletions(-) Not on list: $ b4 mbox cover.1666008238.git.sebastien.boeuf@xxxxxxxxx Looking up https://lore.kernel.org/r/cover.1666008238.git.sebastien.boeuf%40intel.com That message-id is not known. $ dropped for now. > -- > 2.34.1 > > --------------------------------------------------------------------- > Intel Corporation SAS (French simplified joint stock company) > Registered headquarters: "Les Montalets"- 2, rue de Paris, > 92196 Meudon Cedex, France > Registration Number: 302 456 199 R.C.S. NANTERRE > Capital: 5 208 026.16 Euros > > This e-mail and any attachments may contain confidential material for > the sole use of the intended recipient(s). Any review or distribution > by others is strictly prohibited. If you are not the intended > recipient, please contact the sender and delete all copies. _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
