Commit 75d1888d authored Jan 06, 2017 by Sricharan R Committed by Greg Kroah-Hartman Oct 08, 2017

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




[ Upstream commit e19898077cfb642fe151ba22981e795c74d9e114 ]

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>

parent 4af5e613

drivers/iommu/arm-smmu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);
		}