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| author | Olav Haugan <ohaugan@codeaurora.org> | 2014-08-04 19:01:02 +0100 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-10-13 15:41:04 +0200 |
| commit | ab100e044866897de87b9feb5ac819c1ca2f1006 (patch) | |
| tree | 8ad5927e9be90a9d293bec2be67f8e1ae60e9920 /drivers/iommu | |
| parent | 131d24d238b2072982068040d902a2b3a5f26711 (diff) | |
| download | lwn-ab100e044866897de87b9feb5ac819c1ca2f1006.tar.gz lwn-ab100e044866897de87b9feb5ac819c1ca2f1006.zip | |
iommu/arm-smmu: fix programming of SMMU_CBn_TCR for stage 1
commit 1fc870c7efa364862c3bc792cfbdb38afea26742 upstream.
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.
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
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 24a60b9979ca..e26905ca74fa 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -767,8 +767,11 @@ 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) */ |