diff options
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/vfio.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 87ee4f4cff25..916e444e6f74 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -362,10 +362,14 @@ struct vfio_iommu_type1_dma_map { #define VFIO_IOMMU_MAP_DMA _IO(VFIO_TYPE, VFIO_BASE + 13) /** - * VFIO_IOMMU_UNMAP_DMA - _IOW(VFIO_TYPE, VFIO_BASE + 14, struct vfio_dma_unmap) + * VFIO_IOMMU_UNMAP_DMA - _IOWR(VFIO_TYPE, VFIO_BASE + 14, + * struct vfio_dma_unmap) * * Unmap IO virtual addresses using the provided struct vfio_dma_unmap. - * Caller sets argsz. + * Caller sets argsz. The actual unmapped size is returned in the size + * 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. */ struct vfio_iommu_type1_dma_unmap { __u32 argsz; |