linux/drivers/vdpa/mlx5
Jason Wang 55ebf0d60e vdpa: mlx5: prevent cvq work from hogging CPU
A userspace triggerable infinite loop could happen in
mlx5_cvq_kick_handler() if userspace keeps sending a huge amount of
cvq requests.

Fixing this by introducing a quota and re-queue the work if we're out
of the budget (currently the implicit budget is one) . While at it,
using a per device work struct to avoid on demand memory allocation
for cvq.

Fixes: 5262912ef3 ("vdpa/mlx5: Add support for control VQ and MAC setting")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20220329042109.4029-1-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Eli Cohen <elic@nvidia.com>
2022-03-30 04:18:14 -04:00
..
core vhost,virtio,vhost: fixes,features 2021-11-03 15:00:39 -07:00
net vdpa: mlx5: prevent cvq work from hogging CPU 2022-03-30 04:18:14 -04:00
Makefile vdpa/mlx5: Connect mlx5_vdpa to auxiliary bus 2020-12-06 07:32:05 +02:00