diff options
| author | John Garry via iommu <iommu@lists.linux-foundation.org> | 2021-12-07 14:17:26 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2021-12-17 11:10:40 +0300 |
| commit | 972bf252f86062e50f9c9ea81f84f5df0e9f1302 (patch) | |
| tree | a5299fc64027e6a620a9aa378b887053c8d78f70 /drivers/iommu/dma-iommu.c | |
| parent | 9abe2ac834851a7d0b0756e295cf7a292c45ca53 (diff) | |
| download | linux-972bf252f86062e50f9c9ea81f84f5df0e9f1302.tar.xz | |
iommu/iova: Move fast alloc size roundup into alloc_iova_fast()
It really is a property of the IOVA rcache code that we need to alloc a
power-of-2 size, so relocate the functionality to resize into
alloc_iova_fast(), rather than the callsites.
Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Xie Yongji <xieyongji@bytedance.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/1638875846-23993-1-git-send-email-john.garry@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/dma-iommu.c')
| -rw-r--r-- | drivers/iommu/dma-iommu.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index b42e38a0dbe2..84dee53fe892 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -442,14 +442,6 @@ static dma_addr_t iommu_dma_alloc_iova(struct iommu_domain *domain, shift = iova_shift(iovad); iova_len = size >> shift; - /* - * Freeing non-power-of-two-sized allocations back into the IOVA caches - * will come back to bite us badly, so we have to waste a bit of space - * rounding up anything cacheable to make sure that can't happen. The - * order of the unadjusted size will still match upon freeing. - */ - if (iova_len < (1 << (IOVA_RANGE_CACHE_MAX_SIZE - 1))) - iova_len = roundup_pow_of_two(iova_len); dma_limit = min_not_zero(dma_limit, dev->bus_dma_limit); |