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vdpa/mlx5: Take cvq iotlb lock during refresh

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The reslock is taken while refresh is called but iommu_lock is more
specific to this resource. So take the iommu_lock during cvq iotlb
refresh.

Based on Eugenio's patch [0].

[0] https://lore.kernel.org/lkml/20230112142218.725622-4-eperezma@redhat.com/

Acked-by: Jason Wang <jasowang@redhat.com>
Suggested-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Message-Id: <20231018171456.1624030-9-dtatulea@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Si-Wei Liu <si-wei.liu@oracle.com>
Tested-by: Si-Wei Liu <si-wei.liu@oracle.com>
Tested-by: Lei Yang <leiyang@redhat.com>
This commit is contained in:
Dragos Tatulea 2023-10-18 20:14:46 +03:00 committed by Michael S. Tsirkin
parent 512c0cdd80
commit 4c6b97416a
1 changed files with 9 additions and 1 deletions
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10
drivers/vdpa/mlx5/core/mr.c
View File

@ -590,11 +590,19 @@ int mlx5_vdpa_update_cvq_iotlb(struct mlx5_vdpa_dev *mvdev,
struct vhost_iotlb *iotlb,
unsigned int asid)
{
int err;
if (mvdev->group2asid[MLX5_VDPA_CVQ_GROUP] != asid)
return 0;
spin_lock(&mvdev->cvq.iommu_lock);
prune_iotlb(mvdev);
return dup_iotlb(mvdev, iotlb);
err = dup_iotlb(mvdev, iotlb);
spin_unlock(&mvdev->cvq.iommu_lock);
return err;
}
int mlx5_vdpa_create_dma_mr(struct mlx5_vdpa_dev *mvdev)