lkml.org 
[lkml]   [2016]   [Jul]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v5 6/6] Revert "iommu/arm-smmu: Treat all device transactions as unprivileged"
Date
This reverts commit d346180e70b9 ("iommu/arm-smmu: Treat all device
transactions as unprivileged") since some platforms actually make use of
privileged transactions.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.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 4f49fe29f202..46059b06f48d 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));
}
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
\
 
 \ /
  Last update: 2016-07-28 02:21    [W:0.060 / U:1.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site