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| author | Eric Auger <eric.auger@redhat.com> | 2021-03-09 11:27:37 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-03-12 12:40:10 +0000 |
| commit | f14fb6c2db961c3665a61b342ab329b7bd20d1e7 (patch) | |
| tree | 57f311ed8f4d445ad5c1474751e76206e25bf972 /hw/avr/arduino.c | |
| parent | 41ce9a912641cd7f820bcfccea15e30efc32104e (diff) | |
| download | focaccia-qemu-f14fb6c2db961c3665a61b342ab329b7bd20d1e7.tar.gz focaccia-qemu-f14fb6c2db961c3665a61b342ab329b7bd20d1e7.zip | |
dma: Introduce dma_aligned_pow2_mask()
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.auger@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Message-id: 20210309102742.30442-3-eric.auger@redhat.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/avr/arduino.c')
0 files changed, 0 insertions, 0 deletions