Messages in this thread Patch in this message | | | From | Geetha sowjanya <> | Subject | [PATCH v3 4/7] iommu/arm-smmu-v3: For ACPI based device probing, set PAGE0_REGS_ONLY option for ThunderX2 SMMUv3 implementation. | Date | Fri, 5 May 2017 17:38:08 +0530 |
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From: Linu Cherian <linu.cherian@cavium.com>
Enable PAGE0_REGS_ONLY option for Cavium ThunderX2 SMMUv3 model.
Signed-off-by: Linu Cherian <linu.cherian@cavium.com> Signed-off-by: Geetha Sowjanya <geethasowjanya.akula@cavium.com> --- drivers/iommu/arm-smmu-v3.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index f027676..8f7d8ad 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -2625,6 +2625,14 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu) } #ifdef CONFIG_ACPI +static void acpi_smmu_get_options(u32 model, struct arm_smmu_device *smmu) +{ + if (model == ACPI_IORT_SMMU_V3_CAVIUM_CN99XX) + smmu->options |= ARM_SMMU_OPT_PAGE0_REGS_ONLY; + + dev_notice(smmu->dev, "option mask 0x%x\n", smmu->options); +} + static int arm_smmu_device_acpi_probe(struct platform_device *pdev, struct arm_smmu_device *smmu) { @@ -2637,6 +2645,8 @@ static int arm_smmu_device_acpi_probe(struct platform_device *pdev, /* Retrieve SMMUv3 specific data */ iort_smmu = (struct acpi_iort_smmu_v3 *)node->node_data; + acpi_smmu_get_options(iort_smmu->model, smmu); + if (iort_smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE) smmu->features |= ARM_SMMU_FEAT_COHERENCY; -- 1.8.3.1
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