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Groups > linux.kernel > #1540538
| From | Sricharan R <sricharan@codeaurora.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH V7 7/8] iommu/arm-smmu: Set privileged attribute to 'default' instead of 'unprivileged' |
| Date | 2016-12-12 19:50 +0100 |
| Message-ID | <sNDPH-7Pk-9@gated-at.bofh.it> (permalink) |
| References | <sNDG1-7LQ-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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> --- drivers/iommu/arm-smmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index eaa8f44..8bb0eea 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -1213,7 +1213,7 @@ 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); } -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
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[PATCH V7 0/8] Add support for privileged mappings Sricharan R <sricharan@codeaurora.org> - 2016-12-12 19:40 +0100
[PATCH V7 4/8] common: DMA-mapping: add DMA_ATTR_PRIVILEGED attribute Sricharan R <sricharan@codeaurora.org> - 2016-12-12 19:40 +0100
Re: [PATCH V7 4/8] common: DMA-mapping: add DMA_ATTR_PRIVILEGED attribute Robin Murphy <robin.murphy@arm.com> - 2016-12-13 15:00 +0100
[PATCH V7 8/8] iommu/arm-smmu: Revert "iommu/arm-smmu: Set PRIVCFG in stage 1 STEs" Sricharan R <sricharan@codeaurora.org> - 2016-12-12 19:50 +0100
[PATCH V7 7/8] iommu/arm-smmu: Set privileged attribute to 'default' instead of 'unprivileged' Sricharan R <sricharan@codeaurora.org> - 2016-12-12 19:50 +0100
Re: [PATCH V7 7/8] iommu/arm-smmu: Set privileged attribute to 'default' instead of 'unprivileged' Robin Murphy <robin.murphy@arm.com> - 2016-12-13 13:30 +0100
[PATCH V7 3/8] iommu/io-pgtable-arm-v7s: Add support for the IOMMU_PRIV flag Sricharan R <sricharan@codeaurora.org> - 2016-12-12 19:50 +0100
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