diff options
Diffstat (limited to 'include/uapi/linux/vfio.h')
| -rw-r--r-- | include/uapi/linux/vfio.h | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 23105eb036fa..0552e8dcf0cb 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -49,7 +49,11 @@ /* Supports VFIO_DMA_UNMAP_FLAG_ALL */ #define VFIO_UNMAP_ALL 9 -/* Supports the vaddr flag for DMA map and unmap */ +/* + * Supports the vaddr flag for DMA map and unmap. Not supported for mediated + * devices, so this capability is subject to change as groups are added or + * removed. + */ #define VFIO_UPDATE_VADDR 10 /* @@ -1343,8 +1347,7 @@ struct vfio_iommu_type1_info_dma_avail { * Map process virtual addresses to IO virtual addresses using the * provided struct vfio_dma_map. Caller sets argsz. READ &/ WRITE required. * - * If flags & VFIO_DMA_MAP_FLAG_VADDR, update the base vaddr for iova, and - * unblock translation of host virtual addresses in the iova range. The vaddr + * If flags & VFIO_DMA_MAP_FLAG_VADDR, update the base vaddr for iova. The vaddr * must have previously been invalidated with VFIO_DMA_UNMAP_FLAG_VADDR. To * maintain memory consistency within the user application, the updated vaddr * must address the same memory object as originally mapped. Failure to do so @@ -1395,9 +1398,9 @@ struct vfio_bitmap { * 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. + * virtual addresses in the iova range. DMA to already-mapped pages continues. + * Groups may not be added to the container while any addresses are invalid. + * This cannot be combined with the get-dirty-bitmap flag. */ struct vfio_iommu_type1_dma_unmap { __u32 argsz; |