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iommu/arm-smmu: allow 42-bit stage-1 output size with 64K pages

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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>
This commit is contained in:
Will Deacon 2014-03-13 11:46:57 +00:00
parent d1db0eea85
commit c44308413b
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/arm-smmu.c
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@ -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