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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/intc | |
| parent | 41ce9a912641cd7f820bcfccea15e30efc32104e (diff) | |
| download | qemu-f14fb6c2db961c3665a61b342ab329b7bd20d1e7.zip qemu-f14fb6c2db961c3665a61b342ab329b7bd20d1e7.tar.gz qemu-f14fb6c2db961c3665a61b342ab329b7bd20d1e7.tar.bz2 | |
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/intc')
0 files changed, 0 insertions, 0 deletions