Merge "iommu/arm-smmu: support mapping before enabling S1 translations" (8b3c5546) · Commits · e / devices / android_kernel_xiaomi_markw

drivers/iommu/arm-smmu.c

+49 −1

Original line number	Diff line number	Diff line
		@@ -511,6 +511,8 @@ static bool arm_smmu_is_static_cb(struct arm_smmu_device *smmu);
		static bool arm_smmu_is_slave_side_secure(struct arm_smmu_domain *smmu_domain);
		static bool arm_smmu_has_secure_vmid(struct arm_smmu_domain *smmu_domain);

		static int arm_smmu_enable_s1_translations(struct arm_smmu_domain *smmu_domain);

		static void parse_driver_options(struct arm_smmu_device *smmu)
		{
		int i = 0;
		@@ -1486,7 +1488,8 @@ static void arm_smmu_init_context_bank(struct arm_smmu_domain *smmu_domain,
		/* SCTLR */
		reg = SCTLR_CFCFG \| SCTLR_CFIE \| SCTLR_CFRE \| SCTLR_EAE_SBOP;

		if (!(smmu_domain->attributes & (1 << DOMAIN_ATTR_S1_BYPASS)) \|\|
		if ((!(smmu_domain->attributes & (1 << DOMAIN_ATTR_S1_BYPASS)) &&
		!(smmu_domain->attributes & (1 << DOMAIN_ATTR_EARLY_MAP))) \|\|
		!stage1)
		reg \|= SCTLR_M;
		if (stage1)
		@@ -2908,6 +2911,11 @@ static int arm_smmu_domain_get_attr(struct iommu_domain *domain,
		ret = 0;
		break;
		}
		case DOMAIN_ATTR_EARLY_MAP:
		((int )data) = !!(smmu_domain->attributes
		& (1 << DOMAIN_ATTR_EARLY_MAP));
		ret = 0;
		break;
		default:
		ret = -ENODEV;
		break;
		@@ -3036,6 +3044,24 @@ static int arm_smmu_domain_set_attr(struct iommu_domain *domain,
		smmu_domain->attributes \|= 1 << DOMAIN_ATTR_FAST;
		ret = 0;
		break;
		case DOMAIN_ATTR_EARLY_MAP: {
		int early_map = ((int )data);

		ret = 0;
		if (early_map) {
		smmu_domain->attributes \|=
		1 << DOMAIN_ATTR_EARLY_MAP;
		} else {
		if (smmu_domain->smmu)
		ret = arm_smmu_enable_s1_translations(
		smmu_domain);

		if (!ret)
		smmu_domain->attributes &=
		~(1 << DOMAIN_ATTR_EARLY_MAP);
		}
		break;
		}
		default:
		ret = -ENODEV;
		break;
		@@ -3046,6 +3072,28 @@ out_unlock:
		return ret;
		}


		static int arm_smmu_enable_s1_translations(struct arm_smmu_domain *smmu_domain)
		{
		struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
		struct arm_smmu_device *smmu = smmu_domain->smmu;
		void __iomem *cb_base;
		u32 reg;
		int ret;

		cb_base = ARM_SMMU_CB_BASE(smmu) + ARM_SMMU_CB(smmu, cfg->cbndx);
		ret = arm_smmu_enable_clocks(smmu);
		if (ret)
		return ret;

		reg = readl_relaxed(cb_base + ARM_SMMU_CB_SCTLR);
		reg \|= SCTLR_M;

		writel_relaxed(reg, cb_base + ARM_SMMU_CB_SCTLR);
		arm_smmu_disable_clocks(smmu);
		return ret;
		}

		static int arm_smmu_dma_supported(struct iommu_domain *domain,
		struct device *dev, u64 mask)
		{

drivers/iommu/iommu-debug.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -71,6 +71,8 @@ static const char *iommu_debug_attr_to_string(enum iommu_attr attr)
		return "DOMAIN_ATTR_S1_BYPASS";
		case DOMAIN_ATTR_FAST:
		return "DOMAIN_ATTR_FAST";
		case DOMAIN_ATTR_EARLY_MAP:
		return "DOMAIN_ATTR_EARLY_MAP";
		default:
		return "Unknown attr!";
		}

include/linux/iommu.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -108,6 +108,7 @@ enum iommu_attr {
		DOMAIN_ATTR_S1_BYPASS,
		DOMAIN_ATTR_FAST,
		DOMAIN_ATTR_PGTBL_INFO,
		DOMAIN_ATTR_EARLY_MAP,
		DOMAIN_ATTR_MAX,
		};