diff options
| author | Eli Cohen <elic@nvidia.com> | 2021-05-31 18:04:04 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-07-03 10:50:56 +0200 |
| commit | e13cd45d352dedac53529fb49e7d7e293f74fb90 (patch) | |
| tree | fbb2d24124322b2151e997f73a0d3b40a0fb7101 /drivers/vdpa | |
| parent | vdpa/mlx5: Fix possible failure in umem size calculation (diff) | |
| download | linux-e13cd45d352dedac53529fb49e7d7e293f74fb90.tar.xz linux-e13cd45d352dedac53529fb49e7d7e293f74fb90.zip | |
vdpa/mlx5: Support creating resources with uid == 0
Currently all resources must be created with uid != 0 which is essential
when userspace processes are allocating virtquueue resources. Since this
is a kernel implementation, it is perfectly legal to open resources with
uid == 0.
In case firmware supports, avoid allocating user context.
Signed-off-by: Eli Cohen <elic@nvidia.com>
Link: https://lore.kernel.org/r/20210531160404.31368-1-elic@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'drivers/vdpa')
| -rw-r--r-- | drivers/vdpa/mlx5/core/resources.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/vdpa/mlx5/core/resources.c b/drivers/vdpa/mlx5/core/resources.c index 6521cbd0f5c2..836ab9ef0fa6 100644 --- a/drivers/vdpa/mlx5/core/resources.c +++ b/drivers/vdpa/mlx5/core/resources.c @@ -54,6 +54,9 @@ static int create_uctx(struct mlx5_vdpa_dev *mvdev, u16 *uid) void *in; int err; + if (MLX5_CAP_GEN(mvdev->mdev, umem_uid_0)) + return 0; + /* 0 means not supported */ if (!MLX5_CAP_GEN(mvdev->mdev, log_max_uctx)) return -EOPNOTSUPP; @@ -79,6 +82,9 @@ static void destroy_uctx(struct mlx5_vdpa_dev *mvdev, u32 uid) u32 out[MLX5_ST_SZ_DW(destroy_uctx_out)] = {}; u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {}; + if (!uid) + return; + MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX); MLX5_SET(destroy_uctx_in, in, uid, uid); |