From: Linu Cherian <linu.cher...@cavium.com>
Enable PAGE0_REGS_ONLY option for Cavium ThunderX2 SMMUv3 model.
Signed-off-by: Linu Cherian <linu.cher...@cavium.com>
Signed-off-by: Geetha Sowjanya <geethasowjanya.ak...@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
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
