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authorOlav Haugan <ohaugan@codeaurora.org>2014-08-04 19:01:02 +0100
committerWill Deacon <will.deacon@arm.com>2014-09-01 16:48:56 +0100
commit1fc870c7efa364862c3bc792cfbdb38afea26742 (patch)
tree1c5719e57b7fccba898486eb622027036ee770a2 /drivers/iommu/arm-smmu.c
parenta18037b27ebd23edf5edad8bc6ceb72e4bb5716d (diff)
downloadlinux-1fc870c7efa364862c3bc792cfbdb38afea26742.tar.bz2
iommu/arm-smmu: fix programming of SMMU_CBn_TCR for stage 1
Stage-1 context banks do not have the SMMU_CBn_TCR[SL0] field since it is only applicable to stage-2 context banks. This patch ensures that we don't set the reserved TCR bits for stage-1 translations. Cc: <stable@vger.kernel.org> Signed-off-by: Olav Haugan <ohaugan@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'drivers/iommu/arm-smmu.c')
-rw-r--r--drivers/iommu/arm-smmu.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 98fcd87cbacb..1f10ac0d4135 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -843,8 +843,11 @@ static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain)
reg |= TTBCR_EAE |
(TTBCR_SH_IS << TTBCR_SH0_SHIFT) |
(TTBCR_RGN_WBWA << TTBCR_ORGN0_SHIFT) |
- (TTBCR_RGN_WBWA << TTBCR_IRGN0_SHIFT) |
- (TTBCR_SL0_LVL_1 << TTBCR_SL0_SHIFT);
+ (TTBCR_RGN_WBWA << TTBCR_IRGN0_SHIFT);
+
+ if (!stage1)
+ reg |= (TTBCR_SL0_LVL_1 << TTBCR_SL0_SHIFT);
+
writel_relaxed(reg, cb_base + ARM_SMMU_CB_TTBCR);
/* MAIR0 (stage-1 only) */