linux-kernel - [PATCH v3 6/6] Revert "iommu/arm-smmu: Treat all device transactions as unprivileged"

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Message-Id: <20160719203655.16629-7-mitchelh@codeaurora.org>
Date:	Tue, 19 Jul 2016 13:36:55 -0700
From:	Mitchel Humpherys <mitchelh@...eaurora.org>
To:	iommu@...ts.linux-foundation.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Robin Murphy <robin.murphy@....com>,
	Will Deacon <will.deacon@....com>,
	Marek Szyprowski <m.szyprowski@...sung.com>
Cc:	Jordan Crouse <jcrouse@...eaurora.org>,
	Jeremy Gebben <jgebben@...eaurora.org>,
	Patrick Daly <pdaly@...eaurora.org>,
	Pratik Patel <pratikp@...eaurora.org>,
	Thomas Zeng <tzeng@...eaurora.org>,
	Mitchel Humpherys <mitchelh@...eaurora.org>
Subject: [PATCH v3 6/6] Revert "iommu/arm-smmu: Treat all device transactions as unprivileged"

This reverts commit d346180e70b9 ("iommu/arm-smmu: Treat all device
transactions as unprivileged") since some platforms actually make use of
privileged transactions.

Signed-off-by: Mitchel Humpherys <mitchelh@...eaurora.org>
---

Notes:
    v2..v3
    
      - Moved to the end of the series.

 drivers/iommu/arm-smmu.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 9345a3fcb706..d0627ef26b05 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -178,9 +178,6 @@
 #define S2CR_TYPE_BYPASS		(1 << S2CR_TYPE_SHIFT)
 #define S2CR_TYPE_FAULT			(2 << S2CR_TYPE_SHIFT)
 
-#define S2CR_PRIVCFG_SHIFT		24
-#define S2CR_PRIVCFG_UNPRIV		(2 << S2CR_PRIVCFG_SHIFT)
-
 /* Context bank attribute registers */
 #define ARM_SMMU_GR1_CBAR(n)		(0x0 + ((n) << 2))
 #define CBAR_VMID_SHIFT			0
@@ -1175,7 +1172,7 @@ static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain,
 		u32 idx, s2cr;
 
 		idx = cfg->smrs ? cfg->smrs[i].idx : cfg->streamids[i];
-		s2cr = S2CR_TYPE_TRANS | S2CR_PRIVCFG_UNPRIV |
+		s2cr = S2CR_TYPE_TRANS |
 		       (smmu_domain->cfg.cbndx << S2CR_CBNDX_SHIFT);
 		writel_relaxed(s2cr, gr0_base + ARM_SMMU_GR0_S2CR(idx));
 	}
-- 
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