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authorWill Deacon <will.deacon@arm.com>2014-03-13 11:46:57 (GMT)
committerWill Deacon <will.deacon@arm.com>2014-05-02 15:49:31 (GMT)
commitc44308413b92a555d1501a6c0db9489e288bb81b (patch)
treee5a41ace20b4c77f60519dfd515674ff3b3bd68c /drivers/iommu/arm-smmu.c
parentd1db0eea852497762cab43b905b879dfcd3b8987 (diff)
downloadlinux-c44308413b92a555d1501a6c0db9489e288bb81b.tar.xz
iommu/arm-smmu: allow 42-bit stage-1 output size with 64K pages
The output size of stage-1 is currently limited by the input size of stage-2, which is further limited by VA_BITS since we make use of the standard pgd_alloc functions for creating page tables. This patch ensures that we use VA_BITS instead of a hardcoded '39' for the stage-1 output size limit. Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/iommu/arm-smmu.c')
-rw-r--r--drivers/iommu/arm-smmu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 647c3c7..afcb0e3 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1804,7 +1804,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
* allocation (PTRS_PER_PGD).
*/
#ifdef CONFIG_64BIT
- smmu->s1_output_size = min(39UL, size);
+ smmu->s1_output_size = min((unsigned long)VA_BITS, size);
#else
smmu->s1_output_size = min(32UL, size);
#endif