3 files changed, 8 insertions, 0 deletions
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
index 0601dece0a0d..59a480974d80 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
@@ -220,6 +220,9 @@ bool arm_smmu_sva_supported(struct arm_smmu_device *smmu)
 		feat_mask |= ARM_SMMU_FEAT_VAX;
 	}
 
+	if (system_supports_bbml2_noabort())
+		feat_mask |= ARM_SMMU_FEAT_BBML2;
+
 	if ((smmu->features & feat_mask) != feat_mask)
 		return false;
 
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 10cc6dc26b7b..39e933086f8f 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -4457,6 +4457,9 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
 	if (FIELD_GET(IDR3_FWB, reg))
 		smmu->features |= ARM_SMMU_FEAT_S2FWB;
 
+	if (FIELD_GET(IDR3_BBM, reg) == 2)
+		smmu->features |= ARM_SMMU_FEAT_BBML2;
+
 	/* IDR5 */
 	reg = readl_relaxed(smmu->base + ARM_SMMU_IDR5);
 
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
index ea41d790463e..a33bf520ba97 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
@@ -60,6 +60,7 @@ struct arm_smmu_device;
 #define ARM_SMMU_IDR3			0xc
 #define IDR3_FWB			(1 << 8)
 #define IDR3_RIL			(1 << 10)
+#define IDR3_BBM			GENMASK(12, 11)
 
 #define ARM_SMMU_IDR5			0x14
 #define IDR5_STALL_MAX			GENMASK(31, 16)
@@ -755,6 +756,7 @@ struct arm_smmu_device {
 #define ARM_SMMU_FEAT_HA		(1 << 21)
 #define ARM_SMMU_FEAT_HD		(1 << 22)
 #define ARM_SMMU_FEAT_S2FWB		(1 << 23)
+#define ARM_SMMU_FEAT_BBML2		(1 << 24)
 	u32				features;
 
 #define ARM_SMMU_OPT_SKIP_PREFETCH	(1 << 0)