From: sricharan@codeaurora.org (Sricharan R)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V6 6/6] iommu/arm-smmu: Set privileged attribute to 'default' instead of 'unprivileged'
Date: Fri, 2 Dec 2016 20:25:09 +0530 [thread overview]
Message-ID: <1480690509-13490-7-git-send-email-sricharan@codeaurora.org> (raw)
In-Reply-To: <1480690509-13490-1-git-send-email-sricharan@codeaurora.org>
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.
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
---
[V6] V5 was doing this with a 'revert'[1] patch, which no more
applies on this code base. So changed the same like this.
[1] https://patchwork.kernel.org/patch/9250493/
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
next prev parent reply other threads:[~2016-12-02 14:55 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-02 14:55 [RESEND PATCH V6 0/6] Add support for privileged mappings Sricharan R
2016-12-02 14:55 ` [RESEND PATCH V6 1/6] iommu: add IOMMU_PRIV attribute Sricharan R
2016-12-02 14:55 ` [RESEND PATCH V6 2/6] iommu/io-pgtable-arm: add support for the IOMMU_PRIV flag Sricharan R
2016-12-02 14:55 ` [RESEND PATCH V6 3/6] common: DMA-mapping: add DMA_ATTR_PRIVILEGED attribute Sricharan R
2016-12-02 14:55 ` [RESEND PATCH V6 4/6] arm64/dma-mapping: Implement DMA_ATTR_PRIVILEGED Sricharan R
2016-12-02 14:55 ` [RESEND PATCH V6 5/6] dmaengine: pl330: Make sure microcode is privileged Sricharan R
2016-12-06 5:01 ` Vinod Koul
2016-12-02 14:55 ` Sricharan R [this message]
2016-12-06 17:31 ` [PATCH V6 6/6] iommu/arm-smmu: Set privileged attribute to 'default' instead of 'unprivileged' Will Deacon
2016-12-02 16:16 ` [RESEND PATCH V6 0/6] Add support for privileged mappings Robin Murphy
2016-12-04 7:48 ` Sricharan
2016-12-06 19:14 ` Robin Murphy
2016-12-07 9:44 ` Sricharan
2016-12-12 19:34 ` Sricharan
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