Re: [PATCH vhost 1/2] vdpa/mlx5: Fix PA offset with unaligned starting iotlb map

On Mon, Oct 21, 2024 at 9:41 PM Dragos Tatulea dtatulea@nvidia.com wrote:

From: Si-Wei Liu si-wei.liu@oracle.com

When calculating the physical address range based on the iotlb and mr [start,end) ranges, the offset of mr->start relative to map->start is not taken into account. This leads to some incorrect and duplicate mappings.

For the case when mr->start < map->start the code is already correct: the range in [mr->start, map->start) was handled by a different iteration.

Fixes: 94abbccdf291 ("vdpa/mlx5: Add shared memory registration code") Cc: stable@vger.kernel.org Signed-off-by: Si-Wei Liu si-wei.liu@oracle.com Signed-off-by: Dragos Tatulea dtatulea@nvidia.com

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Acked-by: Jason Wang jasowang@redhat.com

Thanks