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| author | Robin Murphy <robin.murphy@arm.com> | 2016-04-07 20:42:06 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2016-05-09 16:33:29 +0300 |
| commit | d16e0faab911cc0e100a1e8e93635b432566608e (patch) | |
| tree | c91fd568f308365f22d42a0ab8cc07e6396c678f /drivers/iommu/dma-iommu.c | |
| parent | 53c92d793395fdab9edbd2f79b084bb6b2e6ae79 (diff) | |
| download | linux-d16e0faab911cc0e100a1e8e93635b432566608e.tar.xz | |
iommu: Allow selecting page sizes per domain
Many IOMMUs support multiple page table formats, meaning that any given
domain may only support a subset of the hardware page sizes presented in
iommu_ops->pgsize_bitmap. There are also certain use-cases where the
creator of a domain may want to control which page sizes are used, for
example to force the use of hugepage mappings to reduce pagetable walk
depth.
To this end, add a per-domain pgsize_bitmap to represent the subset of
page sizes actually in use, to make it possible for domains with
different requirements to coexist.
Signed-off-by: Will Deacon <will.deacon@arm.com>
[rm: hijacked and rebased original patch with new commit message]
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Will Deacon <will.deacon@arm.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 | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 886cb3a78326..99432999b52f 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -94,7 +94,7 @@ int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base, u64 size return -ENODEV; /* Use the smallest supported page size for IOVA granularity */ - order = __ffs(domain->ops->pgsize_bitmap); + order = __ffs(domain->pgsize_bitmap); base_pfn = max_t(unsigned long, 1, base >> order); end_pfn = (base + size - 1) >> order; |