From: Jordan Crouse <jcrouse@codeaurora.org> To: linux-arm-msm@vger.kernel.org Cc: Robin Murphy <robin.murphy@arm.com>, iommu@lists.linux-foundation.org, Will Deacon <will@kernel.org>, Joerg Roedel <joro@8bytes.org>, Krishna Reddy <vdumpa@nvidia.com>, Nicolin Chen <nicoleotsuka@gmail.com>, Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 1/3] iommu/arm-smmu: Add support for driver IOMMU fault handlers Date: Thu, 25 Feb 2021 10:51:33 -0700 [thread overview] Message-ID: <20210225175135.91922-2-jcrouse@codeaurora.org> (raw) In-Reply-To: <20210225175135.91922-1-jcrouse@codeaurora.org> Call report_iommu_fault() to allow upper-level drivers to register their own fault handlers. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> --- drivers/iommu/arm/arm-smmu/arm-smmu.c | 9 +++++++-- 1 file 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 d8c6bfde6a61..0f3a9b5f3284 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, dev, 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); -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Jordan Crouse <jcrouse@codeaurora.org> To: linux-arm-msm@vger.kernel.org Cc: Robin Murphy <robin.murphy@arm.com>, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Will Deacon <will@kernel.org>, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 1/3] iommu/arm-smmu: Add support for driver IOMMU fault handlers Date: Thu, 25 Feb 2021 10:51:33 -0700 [thread overview] Message-ID: <20210225175135.91922-2-jcrouse@codeaurora.org> (raw) In-Reply-To: <20210225175135.91922-1-jcrouse@codeaurora.org> Call report_iommu_fault() to allow upper-level drivers to register their own fault handlers. Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> --- drivers/iommu/arm/arm-smmu/arm-smmu.c | 9 +++++++-- 1 file 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 d8c6bfde6a61..0f3a9b5f3284 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, dev, 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); -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2021-02-25 17:53 UTC|newest] Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-02-25 17:51 [PATCH v3 0/3] iommu/arm-smmu: adreno-smmu page fault handling Jordan Crouse 2021-02-25 17:51 ` Jordan Crouse 2021-02-25 17:51 ` Jordan Crouse 2021-02-25 17:51 ` Jordan Crouse [this message] 2021-02-25 17:51 ` [PATCH v3 1/3] iommu/arm-smmu: Add support for driver IOMMU fault handlers Jordan Crouse 2021-03-02 12:17 ` Robin Murphy 2021-03-02 12:17 ` Robin Murphy 2021-03-02 12:17 ` Robin Murphy 2021-03-02 15:54 ` Jordan Crouse 2021-03-02 15:54 ` Jordan Crouse 2021-03-02 15:54 ` Jordan Crouse 2021-05-11 18:59 ` Rob Clark 2021-05-11 18:59 ` Rob Clark 2021-05-11 18:59 ` Rob Clark 2021-02-25 17:51 ` [PATCH v3 2/3] drm/msm: Add an adreno-smmu-priv callback to get pagefault info Jordan Crouse 2021-02-25 17:51 ` Jordan Crouse 2021-02-25 17:51 ` [PATCH v3 3/3] drm/msm: Improve the a6xx page fault handler Jordan Crouse 2021-02-25 17:51 ` Jordan Crouse 2021-02-25 17:51 ` Jordan Crouse
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