Commit f8f934c1 authored by Jordan Crouse's avatar Jordan Crouse Committed by Rob Clark
Browse files

iommu/arm-smmu: Add support for driver IOMMU fault handlers

Call report_iommu_fault() to allow upper-level drivers to register their
own fault handlers.

Signed-off-by: default avatarJordan Crouse <>
Signed-off-by: default avatarRob Clark <>
Acked-by: default avatarWill Deacon <>
Reviewed-by: default avatarBjorn Andersson <>

Signed-off-by: default avatarRob Clark <>
parent 1d2fa58e
......@@ -408,6 +408,7 @@ static irqreturn_t arm_smmu_context_fault(int irq, void *dev)
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_device *smmu = smmu_domain->smmu;
int idx = smmu_domain->cfg.cbndx;
int ret;
fsr = arm_smmu_cb_read(smmu, idx, ARM_SMMU_CB_FSR);
if (!(fsr & ARM_SMMU_FSR_FAULT))
......@@ -417,6 +418,10 @@ static irqreturn_t arm_smmu_context_fault(int irq, void *dev)
iova = arm_smmu_cb_readq(smmu, idx, ARM_SMMU_CB_FAR);
cbfrsynra = arm_smmu_gr1_read(smmu, ARM_SMMU_GR1_CBFRSYNRA(idx));
ret = report_iommu_fault(domain, NULL, iova,
if (ret == -ENOSYS)
"Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n",
fsr, iova, fsynr, cbfrsynra, idx);
Supports Markdown
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment