diff options
| author |   Olav Haugan <ohaugan@codeaurora.org> | 2014-08-04 19:01:02 +0100 |
|---|---|---|
| committer |   Will Deacon <will.deacon@arm.com> | 2014-09-01 16:48:56 +0100 |
| commit | 1fc870c7efa364862c3bc792cfbdb38afea26742 (patch) | |
| tree | 1c5719e57b7fccba898486eb622027036ee770a2 /drivers/iommu | |
| parent | iommu/arm-smmu: avoid calling request_irq in atomic context (diff) | |
| download | linux-dev-1fc870c7efa364862c3bc792cfbdb38afea26742.tar.xz linux-dev-1fc870c7efa364862c3bc792cfbdb38afea26742.zip | |
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')
| -rw-r--r-- | drivers/iommu/arm-smmu.c | 7 |
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) */ |