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.
-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(-)
