Subject: [PATCH V9 2/9] iommu/io-pgtable-arm: add support for the IOMMU_PRIV flag

From: [email-masked] (Sricharan R)
Date: Fri, 6 Jan 2017 18:58:09 +0530

From: Jeremy Gebben <[email-masked]>

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

Reviewed-by: Robin Murphy <[email-masked]>
Tested-by: Robin Murphy <[email-masked]>
Acked-by: Will Deacon <[email-masked]>
Signed-off-by: Jeremy Gebben <[email-masked]>
---
 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 a40ce34..feacc54 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);
-- 
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