Messages in this thread Patch in this message | | | From | Mitchel Humpherys <> | Subject | [PATCH v4 2/6] iommu/io-pgtable-arm: add support for the IOMMU_PRIV flag | Date | Mon, 25 Jul 2016 12:16:45 -0700 |
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From: Jeremy Gebben <jgebben@codeaurora.org>
Allow the creation of privileged mode mappings, for stage 1 only.
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org> ---
Notes: v2..v3 - Use existing bit definitions.
drivers/iommu/io-pgtable-arm.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index f5c90e1366ce..69ba83a135f1 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -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); -- Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
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