From: kholk11@gmail.com
To: will@kernel.org
Cc: robin.murphy@arm.com, joro@8bytes.org,
bjorn.andersson@linaro.org, linux-arm-kernel@lists.infradead.org,
devicetree@vger.kernel.org, kholk11@gmail.com,
marijns95@gmail.com, konradybcio@gmail.com,
martin.botka1@gmail.com, linux-arm-msm@vger.kernel.org,
phone-devel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 8/8] iommu/arm-smmu-qcom: Add stream_mapping_reset detail to QCOM SMMUv2
Date: Sat, 26 Sep 2020 15:00:04 +0200 [thread overview]
Message-ID: <20200926130004.13528-9-kholk11@gmail.com> (raw)
In-Reply-To: <20200926130004.13528-1-kholk11@gmail.com>
From: AngeloGioacchino Del Regno <kholk11@gmail.com>
On some Qualcomm SoCs with certain hypervisor configurations,
some context banks are hyp-protected and cannot be disabled,
nor the relative S2CRs can be set as bypass, or a hyp-fault
will be triggered and the system will hang.
This is seen on at least Qualcomm SDM630, SDM636 and SDM660.
Signed-off-by: AngeloGioacchino Del Regno <kholk11@gmail.com>
---
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index b18e70bddf29..364908cc2adf 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -85,6 +85,18 @@ static int qcom_smmuv2_cfg_probe(struct arm_smmu_device *smmu)
return 0;
}
+static void qcom_smmuv2_stream_mapping_reset(struct arm_smmu_device *smmu)
+{
+ /*
+ * Broken firmware quirk:
+ * On some Qualcomm SoCs with certain hypervisor configurations,
+ * some context banks are hyp-protected and cannot be disabled,
+ * nor the relative S2CRs can be set as bypass, or a hyp-fault
+ * will be triggered and the system will hang.
+ */
+ return;
+}
+
static void qcom_smmuv2_test_smr_masks(struct arm_smmu_device *smmu)
{
/*
@@ -99,6 +111,7 @@ static void qcom_smmuv2_test_smr_masks(struct arm_smmu_device *smmu)
static const struct arm_smmu_impl qcom_smmuv2_impl = {
.cfg_probe = qcom_smmuv2_cfg_probe,
+ .stream_mapping_reset = qcom_smmuv2_stream_mapping_reset,
.test_smr_masks = qcom_smmuv2_test_smr_masks,
};
--
2.28.0
next prev parent reply other threads:[~2020-09-26 13:00 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-26 12:59 [PATCH 0/8] Implement firmware quirks for Qualcomm ARM-SMMUv2 kholk11
2020-09-26 12:59 ` [PATCH 1/8] iommu/arm-smmu-qcom: Rename qcom_smmu_impl to qcom_smmu500_impl kholk11
2020-09-26 12:59 ` [PATCH 2/8] iommu/arm-smmu-qcom: Add QC SMMUv2 VA Size quirk for SDM660 kholk11
2020-10-14 15:43 ` Robin Murphy
2020-09-26 12:59 ` [PATCH 3/8] dt-bindings: arm-smmu: add binding for SMMUv2 on Qualcomm SDM660 kholk11
2020-09-29 19:10 ` Rob Herring
2020-09-26 13:00 ` [PATCH 4/8] iommu/arm-smmu: Support test_smr_masks implementation detail deviation kholk11
2020-10-14 15:52 ` Robin Murphy
2020-09-26 13:00 ` [PATCH 5/8] iommu/arm-smmu-qcom: Add test_smr_masks detail to QCOM SMMUv2 kholk11
2020-09-26 13:00 ` [PATCH 6/8] iommu/arm-smmu: Move stream mapping reset to separate function kholk11
2020-10-14 15:56 ` Robin Murphy
2020-09-26 13:00 ` [PATCH 7/8] iommu/arm-smmu: Support stream_mapping_reset implementation detail kholk11
2020-09-26 13:00 ` kholk11 [this message]
2020-10-14 22:14 ` [PATCH 8/8] iommu/arm-smmu-qcom: Add stream_mapping_reset detail to QCOM SMMUv2 Bjorn Andersson
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