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iommu/arm-smmu: Set privileged attribute to 'default' instead of 'unprivileged'

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[ Upstream commit e19898077c ]

Currently the driver sets all the device transactions privileges
to UNPRIVILEGED, but there are cases where the iommu masters wants
to isolate privileged supervisor and unprivileged user.
So don't override the privileged setting to unprivileged, instead
set it to default as incoming and let it be controlled by the pagetable
settings.

Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sricharan R
2017-01-06 18:58:15 +05:30
committed by Greg Kroah-Hartman
parent 4af5e6136d
commit 75d1888ddc
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/arm-smmu.c
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@@ -1211,7 +1211,7 @@ static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain,
continue;
s2cr[idx].type = type;
s2cr[idx].privcfg = S2CR_PRIVCFG_UNPRIV;
s2cr[idx].privcfg = S2CR_PRIVCFG_DEFAULT;
s2cr[idx].cbndx = cbndx;
arm_smmu_write_s2cr(smmu, idx);
}