On Tue, 6 Dec 2022 13:55:46 -0800
Steve Sistare <steven.sistare@xxxxxxxxxx> wrote:
> diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h
> index d7d8e09..5c5cc7e 100644
> --- a/include/uapi/linux/vfio.h
> +++ b/include/uapi/linux/vfio.h
...
> @@ -1265,18 +1256,12 @@ struct vfio_bitmap {
> *
> * If flags & VFIO_DMA_UNMAP_FLAG_ALL, unmap all addresses. iova and size
> * must be 0. This cannot be combined with the get-dirty-bitmap flag.
> - *
> - * If flags & VFIO_DMA_UNMAP_FLAG_VADDR, do not unmap, but invalidate host
> - * virtual addresses in the iova range. Tasks that attempt to translate an
> - * iova's vaddr will block. DMA to already-mapped pages continues. This
> - * cannot be combined with the get-dirty-bitmap flag.
> */
> struct vfio_iommu_type1_dma_unmap {
> __u32 argsz;
> __u32 flags;
> #define VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP (1 << 0)
> #define VFIO_DMA_UNMAP_FLAG_ALL (1 << 1)
> -#define VFIO_DMA_UNMAP_FLAG_VADDR (1 << 2)
This flag should probably be marked reserved.
Should we consider this separately for v6.2?
For the remainder, the long term plan is to move to iommufd, so any new
feature of type1 would need equivalent support in iommufd. Thanks,
Alex
