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Commit e7468a23 authored by Jeremy Gebben's avatar Jeremy Gebben Committed by Will Deacon
Browse files

iommu/io-pgtable-arm: add support for the IOMMU_PRIV flag 



Allow the creation of privileged mode mappings, for stage 1 only.

Reviewed-by: default avatarRobin Murphy <robin.murphy@arm.com>
Tested-by: default avatarRobin Murphy <robin.murphy@arm.com>
Acked-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarJeremy Gebben <jgebben@codeaurora.org>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 579b2a65

drivers/iommu/io-pgtable-arm.c

+4 −1
Original line number Diff line number Diff line
@@ -350,11 +350,14 @@ static arm_lpae_iopte arm_lpae_prot_to_pte(struct arm_lpae_io_pgtable *data, 


	if (data->iop.fmt == ARM_64_LPAE_S1 ||

	    data->iop.fmt == ARM_32_LPAE_S1) {

		pte = ARM_LPAE_PTE_AP_UNPRIV | ARM_LPAE_PTE_nG;

		pte = ARM_LPAE_PTE_nG;



		if (!(prot & IOMMU_WRITE) && (prot & IOMMU_READ))

			pte |= ARM_LPAE_PTE_AP_RDONLY;



		if (!(prot & IOMMU_PRIV))

			pte |= ARM_LPAE_PTE_AP_UNPRIV;



		if (prot & IOMMU_MMIO)

			pte |= (ARM_LPAE_MAIR_ATTR_IDX_DEV

				<< ARM_LPAE_PTE_ATTRINDX_SHIFT);