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From:   Bjorn Andersson <quic_bjorande@quicinc.com>
Subject: [PATCH v3 0/3] soc: qcom: rmtfs: Support dynamic allocation
Date:   Wed, 20 Sep 2023 19:37:29 -0700
Message-ID: <20230920-rmtfs-mem-guard-pages-v3-0-305b37219b78@quicinc.com>
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To:     Andy Gross <agross@kernel.org>,
        Bjorn Andersson <andersson@kernel.org>,
        Konrad Dybcio <konrad.dybcio@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>
CC:     <linux-arm-msm@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        Bjorn Andersson <quic_bjorande@quicinc.com>
Precedence: bulk

Some platforms have laxed requirements on the placement of the rmtfs
memory region, introduce support for guard pages to allow the DeviceTree
author to rely on the OS/Linux for placement of the region.

Changes since v2:
- Rewrote DeviceTree binding description, to avoid dictating the OS
  behavior.
- Adjusted addr and size before memremap(), to avoid mapping the guard
  pages, and unnecessarily have to adjust the base pointer.

Changes since v1:
- Drop qcom,alloc-size in favour of using reserved-memory/size
- Introduce explicit property to signal that guard pages should be
  carved out from this region (rather than always do it in the dynamic
  case).
- Drop the dma_alloc_coherent() based approach and just add support for
  the guard pages.
- Added handling of failed reserved-memory allocation (patch 3)

---
Bjorn Andersson (3):
      dt-bindings: reserved-memory: rmtfs: Allow guard pages
      soc: qcom: rmtfs: Support discarding guard pages
      soc: qcom: rtmfs: Handle reserved-memory allocation issues

 .../devicetree/bindings/reserved-memory/qcom,rmtfs-mem.yaml   | 11 +++++++++++
 drivers/soc/qcom/rmtfs_mem.c                                  | 11 ++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)
---
base-commit: 926f75c8a5ab70567eb4c2d82fbc96963313e564
change-id: 20230920-rmtfs-mem-guard-pages-d3d0ed0cb036

Best regards,
-- 
Bjorn Andersson <quic_bjorande@quicinc.com>