linux-kernel - [PATCH v2 0/8] Add support for Qualcomm's legacy IOMMU v2

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Date:   Fri, 11 Nov 2022 15:59:11 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     agross@...nel.org
Cc:     andersson@...nel.org, konrad.dybcio@...aro.org, joro@...tes.org,
        will@...nel.org, robin.murphy@....com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, robdclark@...il.com,
        linux-arm-msm@...r.kernel.org, iommu@...ts.linux.dev,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        marijn.suijten@...ainline.org, kernel@...labora.com,
        luca@...tu.xyz, a39.skl@...il.com, phone-devel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v2 0/8] Add support for Qualcomm's legacy IOMMU v2

This series adds support for handling "v2" firmware's IOMMU, found
on at least MSM8956 and MSM8976 (some other SoCs also need the same
but I honestly don't remember which ones precisely).

This is strictly required to get functional IOMMUs on these SoCs.

I'm sorry for not performing a much needed schema conversion on
qcom,iommu.txt, but I really didn't have time to do that :-(

This series was tested on Sony Xperia X and X Compact (MSM8956):
ADSP, LPASS, Venus, MSS, MDP and GPU are happy :-)

Changes in v2:
 - Added back Marijn's notes (sorry man!)
 - Added ARM_SMMU_CB_FSRRESTORE definition
 - Changed context bank reset to properly set FSR and FSRRESTORE

AngeloGioacchino Del Regno (8):
  dt-bindings: iommu: qcom,iommu: Document qcom,ctx-num property
  iommu/qcom: Use the asid read from device-tree if specified
  iommu/arm-smmu: Add definition for ARM_SMMU_CB_FSRRESTORE
  iommu/qcom: Properly reset the IOMMU context
  iommu/qcom: Index contexts by asid number to allow asid 0
  dt-bindings: iommu: qcom,iommu: Document QSMMU v2 compatibles
  iommu/qcom: Add support for QSMMUv2 and QSMMU-500 secured contexts
  dt-bindings: iommu: qcom,iommu: Document MSM8976 compatible

 .../devicetree/bindings/iommu/qcom,iommu.txt  | 11 ++-
 drivers/iommu/arm/arm-smmu/arm-smmu.h         |  1 +
 drivers/iommu/arm/arm-smmu/qcom_iommu.c       | 78 +++++++++++++++----
 3 files changed, 71 insertions(+), 19 deletions(-)

-- 
2.38.1