diff options
| author | Steve Sistare <steven.sistare@oracle.com> | 2025-07-02 14:58:45 -0700 |
|---|---|---|
| committer | Cédric Le Goater <clg@redhat.com> | 2025-07-03 13:42:28 +0200 |
| commit | fb32965b6dd8a001815593642a5146fbd2e85651 (patch) | |
| tree | 5a851ce1c196bf3f6df67136ab33256b2bcbb59b /include | |
| parent | d7ae4a740c8e49962ccfbbf41da0b3b8314518ce (diff) | |
| download | qemu-fb32965b6dd8a001815593642a5146fbd2e85651.zip qemu-fb32965b6dd8a001815593642a5146fbd2e85651.tar.gz qemu-fb32965b6dd8a001815593642a5146fbd2e85651.tar.bz2 | |
vfio/iommufd: use IOMMU_IOAS_MAP_FILE
Use IOMMU_IOAS_MAP_FILE when the mapped region is backed by a file.
Such a mapping can be preserved without modification during CPR,
because it depends on the file's address space, which does not change,
rather than on the process's address space, which does change.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Link: https://lore.kernel.org/qemu-devel/1751493538-202042-9-git-send-email-steven.sistare@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hw/vfio/vfio-container-base.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h index 3cd86ec..bded6e9 100644 --- a/include/hw/vfio/vfio-container-base.h +++ b/include/hw/vfio/vfio-container-base.h @@ -168,6 +168,21 @@ struct VFIOIOMMUClass { hwaddr iova, ram_addr_t size, void *vaddr, bool readonly, MemoryRegion *mr); /** + * @dma_map_file + * + * Map a file range for the container. + * + * @bcontainer: #VFIOContainerBase to use for map + * @iova: start address to map + * @size: size of the range to map + * @fd: descriptor of the file to map + * @start: starting file offset of the range to map + * @readonly: map read only if true + */ + int (*dma_map_file)(const VFIOContainerBase *bcontainer, + hwaddr iova, ram_addr_t size, + int fd, unsigned long start, bool readonly); + /** * @dma_unmap * * Unmap an address range from the container. |