linux-kernel - [PATCH v8 6/7] iommu/arm-smmu-qcom: Use the custom fault handler on more platforms

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Message-ID: <20240417133731.2055383-7-quic_c_gdjako@quicinc.com>
Date: Wed, 17 Apr 2024 06:37:30 -0700
From: Georgi Djakov <quic_c_gdjako@...cinc.com>
To: <will@...nel.org>, <robin.murphy@....com>, <joro@...tes.org>,
        <iommu@...ts.linux.dev>
CC: <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>, <devicetree@...r.kernel.org>,
        <andersson@...nel.org>, <konrad.dybcio@...aro.org>,
        <robdclark@...il.com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <quic_cgoldswo@...cinc.com>, <quic_sukadev@...cinc.com>,
        <quic_pdaly@...cinc.com>, <quic_sudaraja@...cinc.com>,
        <djakov@...nel.org>
Subject: [PATCH v8 6/7] iommu/arm-smmu-qcom: Use the custom fault handler on more platforms

The TBU support is now available, so let's allow it to be used on other
platforms that have the Qualcomm SMMU-500 implementation with TBUs. This
will allow the context fault handler to query the TBUs when a context
fault occurs.

Signed-off-by: Georgi Djakov <quic_c_gdjako@...cinc.com>
---
 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index a901230dbabd..25f034677f56 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -413,6 +413,10 @@ static const struct arm_smmu_impl qcom_smmu_500_impl = {
 	.reset = arm_mmu500_reset,
 	.write_s2cr = qcom_smmu_write_s2cr,
 	.tlb_sync = qcom_smmu_tlb_sync,
+#ifdef CONFIG_ARM_SMMU_QCOM_DEBUG
+	.context_fault = qcom_smmu_context_fault,
+	.context_fault_needs_threaded_irq = true,
+#endif
 };
 
 static const struct arm_smmu_impl sdm845_smmu_500_impl = {