summaryrefslogtreecommitdiff
path: root/drivers/iommu
diff options
context:
space:
mode:
authorJordan Crouse <jcrouse@codeaurora.org>2021-06-10 14:44:09 -0700
committerRob Clark <robdclark@chromium.org>2021-06-23 07:33:55 -0700
commitf8f934c180f629bb927a04fd90d6a16ef1a94073 (patch)
treee9991e70ac9e3bcbe888675ded71b156612fa2bf /drivers/iommu
parent1d2fa58e0dda3344999cad9b195eb539310ad093 (diff)
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: Jordan Crouse <jcrouse@codeaurora.org> Signed-off-by: Rob Clark <robdclark@chromium.org> Acked-by: Will Deacon <will@kernel.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lore.kernel.org/r/20210610214431.539029-2-robdclark@gmail.com Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/arm/arm-smmu/arm-smmu.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 6f72c4d208ca..b4b32d31fc06 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -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))
@@ -417,8 +418,12 @@ 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));
- dev_err_ratelimited(smmu->dev,
- "Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n",
+ ret = report_iommu_fault(domain, NULL, iova,
+ fsynr & ARM_SMMU_FSYNR0_WNR ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ);
+
+ if (ret == -ENOSYS)
+ dev_err_ratelimited(smmu->dev,
+ "Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n",
fsr, iova, fsynr, cbfrsynra, idx);
arm_smmu_cb_write(smmu, idx, ARM_SMMU_CB_FSR, fsr);