diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 9e702788e90f8f217e854ca69a2cdbc2676c8d87..74886facbcab8e9d1d30d48c43ccb94ad29f1057 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -3249,6 +3249,9 @@ static struct iommu_device *arm_smmu_probe_device(struct device *dev) struct arm_smmu_device *smmu; struct arm_smmu_master *master; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); +#ifdef CONFIG_ASCEND_FEATURES + u32 sid; +#endif if (!fwspec || fwspec->ops != &arm_smmu_ops) return ERR_PTR(-ENODEV); @@ -3295,6 +3298,15 @@ static struct iommu_device *arm_smmu_probe_device(struct device *dev) smmu->features & ARM_SMMU_FEAT_STALL_FORCE) master->stall_enabled = true; +#ifdef CONFIG_ASCEND_FEATURES + if (!acpi_dev_prop_read_single(ACPI_COMPANION(dev), + "streamid", DEV_PROP_U32, &sid)) { + if (iommu_fwspec_add_ids(dev, &sid, 1)) + dev_info(dev, "failed to add ids\n"); + master->stall_enabled = true; + master->ssid_bits = 0x10; + } +#endif arm_smmu_init_pri(master); return &smmu->iommu;