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iommu/arm-smmu: use VA_BITS to determine arm64 virtual address space 

With the introduction of the VA_BITS definition for arm64, make use of
it in the driver, allowing up to 42-bits of VA space when configured
with 64k pages.

Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Will Deacon 2013-11-05 15:55:04 +00:00
parent 5fc63a7c44
commit 06f983dd57
1 changed files with 2 additions and 3 deletions
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5
drivers/iommu/arm-smmu.c
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@ -24,7 +24,7 @@
* - v7/v8 long-descriptor format
* - Non-secure access to the SMMU
* - 4k and 64k pages, with contiguous pte hints.
* - Up to 39-bit addressing
* - Up to 42-bit addressing (dependent on VA_BITS)
* - Context fault reporting
*/
@ -1747,7 +1747,6 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
* allocation (PTRS_PER_PGD).
*/
#ifdef CONFIG_64BIT
/* Current maximum output size of 39 bits */
smmu->s1_output_size = min(39UL, size);
#else
smmu->s1_output_size = min(32UL, size);
@ -1762,7 +1761,7 @@ static int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
} else {
#ifdef CONFIG_64BIT
size = (id >> ID2_UBS_SHIFT) & ID2_UBS_MASK;
size = min(39, arm_smmu_id_size_to_bits(size));
size = min(VA_BITS, arm_smmu_id_size_to_bits(size));
#else
size = 32;
#endif