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authorRobin Murphy <robin.murphy@arm.com>2017-01-06 18:58:10 +0530
committerWill Deacon <will.deacon@arm.com>2017-01-19 15:56:18 +0000
commit5baf1e9d0bb223b086c422b880359c9fe2ee1476 (patch)
treeef727192efa4d51add649ef4ee219d451cf4ab55 /drivers/iommu
parente7468a23daec1a7737a004c659fd041ddff8b918 (diff)
downloadlinux-5baf1e9d0bb223b086c422b880359c9fe2ee1476.tar.bz2
iommu/io-pgtable-arm-v7s: Add support for the IOMMU_PRIV flag
The short-descriptor format also allows privileged-only mappings, so let's wire it up. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Tested-by: Sricharan R <sricharan@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/io-pgtable-arm-v7s.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index 0769276c0537..1c049e2e12bf 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -265,7 +265,9 @@ static arm_v7s_iopte arm_v7s_prot_to_pte(int prot, int lvl,
if (!(prot & IOMMU_MMIO))
pte |= ARM_V7S_ATTR_TEX(1);
if (ap) {
- pte |= ARM_V7S_PTE_AF | ARM_V7S_PTE_AP_UNPRIV;
+ pte |= ARM_V7S_PTE_AF;
+ if (!(prot & IOMMU_PRIV))
+ pte |= ARM_V7S_PTE_AP_UNPRIV;
if (!(prot & IOMMU_WRITE))
pte |= ARM_V7S_PTE_AP_RDONLY;
}
@@ -288,6 +290,8 @@ static int arm_v7s_pte_to_prot(arm_v7s_iopte pte, int lvl)
if (!(attr & ARM_V7S_PTE_AP_RDONLY))
prot |= IOMMU_WRITE;
+ if (!(attr & ARM_V7S_PTE_AP_UNPRIV))
+ prot |= IOMMU_PRIV;
if ((attr & (ARM_V7S_TEX_MASK << ARM_V7S_TEX_SHIFT)) == 0)
prot |= IOMMU_MMIO;
else if (pte & ARM_V7S_ATTR_C)