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Commit e2dddfa4 authored by Mitchel Humpherys's avatar Mitchel Humpherys Committed by Matt Wagantall
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iommu: io-pgtable-arm: add support for IOMMU_DEVICE 



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: default avatarMitchel Humpherys <mitchelh@codeaurora.org>
parent 23b3588c

drivers/iommu/io-pgtable-arm.c

+7 −0
Original line number Diff line number Diff line
@@ -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)