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authorRobin Murphy <robin.murphy@arm.com>2016-04-07 18:42:06 +0100
committerJoerg Roedel <jroedel@suse.de>2016-05-09 15:33:29 +0200
commitd16e0faab911cc0e100a1e8e93635b432566608e (patch)
treec91fd568f308365f22d42a0ab8cc07e6396c678f /drivers/vfio
parent53c92d793395fdab9edbd2f79b084bb6b2e6ae79 (diff)
downloadop-kernel-dev-d16e0faab911cc0e100a1e8e93635b432566608e.zip
op-kernel-dev-d16e0faab911cc0e100a1e8e93635b432566608e.tar.gz
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.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 75b24e9..15a6582 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);
/*
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