diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c index 087fb4f6f4d3..6372f3e25c4b 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c @@ -286,8 +286,15 @@ static int qcom_smmu_cfg_probe(struct arm_smmu_device *smmu) * MSM8998 LPASS SMMU reports 13 context banks, but accessing * the last context bank crashes the system. */ - if (of_device_is_compatible(smmu->dev->of_node, "qcom,msm8998-smmu-v2") && smmu->num_context_banks == 13) + if (of_device_is_compatible(smmu->dev->of_node, "qcom,msm8998-smmu-v2") && + smmu->num_context_banks == 13) { smmu->num_context_banks = 12; + } else if (of_device_is_compatible(smmu->dev->of_node, "qcom,sdm630-smmu-v2")) { + if (smmu->num_context_banks == 21) /* SDM630 / SDM660 A2NOC SMMU */ + smmu->num_context_banks = 7; + else if (smmu->num_context_banks == 14) /* SDM630 / SDM660 LPASS SMMU */ + smmu->num_context_banks = 13; + } /* * Some platforms support more than the Arm SMMU architected maximum of @@ -350,6 +357,11 @@ static int qcom_adreno_smmuv2_cfg_probe(struct arm_smmu_device *smmu) /* Support for 16K pages is advertised on some SoCs, but it doesn't seem to work */ smmu->features &= ~ARM_SMMU_FEAT_FMT_AARCH64_16K; + /* TZ protects several last context banks, hide them from Linux */ + if (of_device_is_compatible(smmu->dev->of_node, "qcom,sdm630-smmu-v2") && + smmu->num_context_banks == 5) + smmu->num_context_banks = 2; + return 0; } |