On Tue, 2023-09-26 at 05:22 -0700, Si-Wei Liu wrote: > > > On 9/25/2023 12:59 AM, Dragos Tatulea wrote: > > On Tue, 2023-09-12 at 16:01 +0300, Dragos Tatulea wrote: > > > This patch series adds support for vq descriptor table mappings which > > > are used to improve vdpa live migration downtime. The improvement comes > > > from using smaller mappings which take less time to create and destroy > > > in hw. > > > > > Gentle ping. > > > > Note that I will have to send a v2. The changes in mlx5_ifc.h will need to > > be > > merged first separately into the mlx5-next branch [0] and then pulled from > > there > > when the series is applied. > This separation is unnecessary, as historically the virtio emulation > portion of the update to mlx5_ifc.h often had to go through the vhost > tree. See commits 1892a3d425bf and e13cd45d352d. Especially the > additions from this series (mainly desc group mkey) have nothing to do > with any networking or NIC driver feature. > The reason for doing that is to avoid conflicts in Linus's tree on the mlx5_ifc.h file. Thanks, Dragos > -Siwei > > > > > [0] > > https://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux.git/log/?h=mlx5-next > > > > Thanks, > > Dragos > > > > > The first part adds the vdpa core changes from Si-Wei [0]. > > > > > > The second part adds support in mlx5_vdpa: > > > - Refactor the mr code to be able to cleanly add descriptor mappings. > > > - Add hardware descriptor mr support. > > > - Properly update iotlb for cvq during ASID switch. > > > > > > [0] > > > https://lore.kernel.org/virtualization/1694248959-13369-1-git-send-email-si-wei.liu@xxxxxxxxxx > > > > > > Dragos Tatulea (13): > > > vdpa/mlx5: Create helper function for dma mappings > > > vdpa/mlx5: Decouple cvq iotlb handling from hw mapping code > > > vdpa/mlx5: Take cvq iotlb lock during refresh > > > vdpa/mlx5: Collapse "dvq" mr add/delete functions > > > vdpa/mlx5: Rename mr destroy functions > > > vdpa/mlx5: Allow creation/deletion of any given mr struct > > > vdpa/mlx5: Move mr mutex out of mr struct > > > vdpa/mlx5: Improve mr update flow > > > vdpa/mlx5: Introduce mr for vq descriptor > > > vdpa/mlx5: Enable hw support for vq descriptor mapping > > > vdpa/mlx5: Make iotlb helper functions more generic > > > vdpa/mlx5: Update cvq iotlb mapping on ASID change > > > Cover letter: vdpa/mlx5: Add support for vq descriptor mappings > > > > > > Si-Wei Liu (3): > > > vdpa: introduce dedicated descriptor group for virtqueue > > > vhost-vdpa: introduce descriptor group backend feature > > > vhost-vdpa: uAPI to get dedicated descriptor group id > > > > > > drivers/vdpa/mlx5/core/mlx5_vdpa.h | 31 +++-- > > > drivers/vdpa/mlx5/core/mr.c | 191 ++++++++++++++++------------- > > > drivers/vdpa/mlx5/core/resources.c | 6 +- > > > drivers/vdpa/mlx5/net/mlx5_vnet.c | 100 ++++++++++----- > > > drivers/vhost/vdpa.c | 27 ++++ > > > include/linux/mlx5/mlx5_ifc.h | 8 +- > > > include/linux/mlx5/mlx5_ifc_vdpa.h | 7 +- > > > include/linux/vdpa.h | 11 ++ > > > include/uapi/linux/vhost.h | 8 ++ > > > include/uapi/linux/vhost_types.h | 5 + > > > 10 files changed, 264 insertions(+), 130 deletions(-) > > > >
