On Tue, Mar 09, 2021 at 11:27:37AM +0100, Eric Auger wrote: > Currently get_naturally_aligned_size() is used by the intel iommu > to compute the maximum invalidation range based on @size which is > a power of 2 while being aligned with the @start address and less > than the maximum range defined by @gaw. > > This helper is also useful for other iommu devices (virtio-iommu, > SMMUv3) to make sure IOMMU UNMAP notifiers only are called with > power of 2 range sizes. > > Let's move this latter into dma-helpers.c and rename it into > dma_aligned_pow2_mask(). Also rewrite the helper so that it > accomodates UINT64_MAX values for the size mask and max mask. > It now returns a mask instead of a size. Change the caller. > > Signed-off-by: Eric Auger <eric.au...@redhat.com>
Reviewed-by: Peter Xu <pet...@redhat.com> -- Peter Xu
