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iommu: io-pgtable-arm: add support for IOMMU_DEVICE

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Clients might want to map device memory into their SMMU.  Add support
for these device mappings through the IOMMU_DEVICE flag.

Change-Id: I756720181aa0d531f4c56453ef832f81b36ffccd
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Mitchel Humpherys 2015-05-08 10:56:54 -07:00 • committed by David Keitel
parent 97088977b0
commit 3e7d85603a
1 changed files with 7 additions and 0 deletions
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7
drivers/iommu/io-pgtable-arm.c
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@ -284,6 +284,10 @@ static arm_lpae_iopte arm_lpae_prot_to_pte(struct arm_lpae_io_pgtable *data,
if (prot & IOMMU_CACHE)
pte |= (ARM_LPAE_MAIR_ATTR_IDX_CACHE
<< ARM_LPAE_PTE_ATTRINDX_SHIFT);
if (prot & IOMMU_DEVICE)
pte |= (ARM_LPAE_MAIR_ATTR_IDX_DEV <<
ARM_LPAE_PTE_ATTRINDX_SHIFT);
} else {
pte = ARM_LPAE_PTE_HAP_FAULT;
if (prot & IOMMU_READ)
@ -294,6 +298,9 @@ static arm_lpae_iopte arm_lpae_prot_to_pte(struct arm_lpae_io_pgtable *data,
pte |= ARM_LPAE_PTE_MEMATTR_OIWB;
else
pte |= ARM_LPAE_PTE_MEMATTR_NC;
if (prot & IOMMU_DEVICE)
pte |= ARM_LPAE_PTE_MEMATTR_DEV;
}
if (prot & IOMMU_NOEXEC)