IOMMUFD kernel uAPI supports unmapping whole address space in one call with [iova, size] set to [0, UINT64_MAX], this can simplify iommufd_cdev_unmap() a bit. See iommufd_ioas_unmap() in kernel for details.
Signed-off-by: Zhenzhong Duan <[email protected]> --- hw/vfio/iommufd.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index 68470d552e..336f8fdb04 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -62,21 +62,8 @@ static int iommufd_cdev_unmap(const VFIOContainer *bcontainer, { const VFIOIOMMUFDContainer *container = VFIO_IOMMU_IOMMUFD(bcontainer); - /* unmap in halves */ if (unmap_all) { - Int128 llsize = int128_rshift(int128_2_64(), 1); - int ret; - - ret = iommufd_backend_unmap_dma(container->be, container->ioas_id, - 0, int128_get64(llsize)); - - if (ret == 0) { - ret = iommufd_backend_unmap_dma(container->be, container->ioas_id, - int128_get64(llsize), - int128_get64(llsize)); - } - - return ret; + size = UINT64_MAX; } /* TODO: Handle dma_unmap_bitmap with iotlb args (migration) */ -- 2.47.1
