On Sun, Nov 06, 2022 at 07:46:18PM +0200, Yishai Hadas wrote: > Add an option to get migration data size by introducing a new migration > feature named VFIO_DEVICE_FEATURE_MIG_DATA_SIZE. > > Upon VFIO_DEVICE_FEATURE_GET the estimated data length that will be > required to complete STOP_COPY is returned. > > This option may better enable user space to consider before moving to > STOP_COPY whether it can meet the downtime SLA based on the returned > data. > > The patch also includes the implementation for mlx5 and hisi for this > new option to make it feature complete for the existing drivers in this > area. > > Signed-off-by: Yishai Hadas <yishaih@xxxxxxxxxx> > --- > .../vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 9 ++++++ > drivers/vfio/pci/mlx5/main.c | 18 +++++++++++ > drivers/vfio/pci/vfio_pci_core.c | 3 +- > drivers/vfio/vfio_main.c | 32 +++++++++++++++++++ > include/linux/vfio.h | 5 +++ > include/uapi/linux/vfio.h | 13 ++++++++ > 6 files changed, 79 insertions(+), 1 deletion(-) Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
