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| author | Robin Murphy <robin.murphy@arm.com> | 2016-04-07 18:42:06 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2016-05-09 15:33:29 +0200 |
| commit | d16e0faab911cc0e100a1e8e93635b432566608e (patch) | |
| tree | c91fd568f308365f22d42a0ab8cc07e6396c678f /drivers/vfio | |
| parent | 53c92d793395fdab9edbd2f79b084bb6b2e6ae79 (diff) | |
| download | linux-d16e0faab911cc0e100a1e8e93635b432566608e.tar.bz2 | |
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/vfio')
| -rw-r--r-- | drivers/vfio/vfio_iommu_type1.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 75b24e93cedb..15a65823aad9 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -407,7 +407,7 @@ static unsigned long vfio_pgsize_bitmap(struct vfio_iommu *iommu) mutex_lock(&iommu->lock); list_for_each_entry(domain, &iommu->domain_list, next) - bitmap &= domain->domain->ops->pgsize_bitmap; + bitmap &= domain->domain->pgsize_bitmap; mutex_unlock(&iommu->lock); /* |