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| author | Steve Sistare <steven.sistare@oracle.com> | 2021-01-29 08:54:04 -0800 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2021-02-01 13:20:05 -0700 |
| commit | c98fe7c2a2038af2bc24f039ccdb5a65c22ba11a (patch) | |
| tree | 95fd22f9cbefefb0f23b92107ee52ec5c0829f20 /include/uapi | |
| parent | 1048ba83fb1c00cd24172e23e8263972f6b5d9ac (diff) | |
| download | linux-stable-c98fe7c2a2038af2bc24f039ccdb5a65c22ba11a.tar.gz linux-stable-c98fe7c2a2038af2bc24f039ccdb5a65c22ba11a.tar.bz2 linux-stable-c98fe7c2a2038af2bc24f039ccdb5a65c22ba11a.zip | |
vfio: option to unmap all
For the UNMAP_DMA ioctl, delete all mappings if VFIO_DMA_UNMAP_FLAG_ALL
is set. Define the corresponding VFIO_UNMAP_ALL extension.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/vfio.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index d1812777139f..78462599e5ed 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -46,6 +46,9 @@ */ #define VFIO_NOIOMMU_IOMMU 8 +/* Supports VFIO_DMA_UNMAP_FLAG_ALL */ +#define VFIO_UNMAP_ALL 9 + /* * The IOCTL interface is designed for extensibility by embedding the * structure length (argsz) and flags into structures passed between @@ -1102,6 +1105,7 @@ struct vfio_bitmap { * field. No guarantee is made to the user that arbitrary unmaps of iova * or size different from those used in the original mapping call will * succeed. + * * VFIO_DMA_UNMAP_FLAG_GET_DIRTY_BITMAP should be set to get the dirty bitmap * before unmapping IO virtual addresses. When this flag is set, the user must * provide a struct vfio_bitmap in data[]. User must provide zero-allocated @@ -1111,11 +1115,15 @@ struct vfio_bitmap { * indicates that the page at that offset from iova is dirty. A Bitmap of the * pages in the range of unmapped size is returned in the user-provided * vfio_bitmap.data. + * + * 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. */ 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) __u64 iova; /* IO virtual address */ __u64 size; /* Size of mapping (bytes) */ __u8 data[]; |