linux-kernel - [PATCH 0/6] irqchip/gic-v3: Disable pseudo NMIs on Mediatek Chromebooks w/ bad FW

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Message-ID: <20230511150539.6.Ia0b6ebbaa351e3cd67e201355b9ae67783c7d718@changeid>
Date:   Thu, 11 May 2023 15:05:34 -0700
From:   Douglas Anderson <dianders@...omium.org>
To:     Marc Zyngier <maz@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     devicetree@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        wenst@...omium.org, Eddie Huang <eddie.huang@...iatek.com>,
        Allen-KH Cheng <allen-kh.cheng@...iatek.com>,
        Ben Ho <Ben.Ho@...iatek.com>, Weiyi Lu <weiyi.lu@...iatek.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        linux-arm-kernel@...ts.infradead.org,
        Tinghan Shen <tinghan.shen@...iatek.com>, jwerner@...omium.org,
        Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>,
        yidilin@...omium.org, Seiya Wang <seiya.wang@...iatek.com>,
        Douglas Anderson <dianders@...omium.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/6] irqchip/gic-v3: Disable pseudo NMIs on Mediatek Chromebooks w/ bad FW

As talked about in the bindings patch included in this series
("dt-bindings: interrupt-controller: arm,gic-v3: Add quirk for
Mediatek SoCs w/ broken FW"), many Mediatek-based Chromebooks shipped
with firmware that doesn't properly save/restore some GICR
registers. This causes the system to crash if "pseudo NMIs" are turned
on.

This series makes sure that we never allow turning on "pseudo NMIs" if
we are running with the problematic firmware.

The patches in this series can land in any order and can go through
entirely different trees. None of the patches are harmful on their
own, but to get things fixed we need all of them.


Douglas Anderson (6):
  dt-bindings: interrupt-controller: arm,gic-v3: Add quirk for Mediatek
    SoCs w/ broken FW
  irqchip/gic-v3: Disable pseudo NMIs on Mediatek devices w/ firmware
    issues
  arm64: dts: mediatek: mt8183: Add mediatek,gicr-save-quirk
  arm64: dts: mediatek: mt8186: Add mediatek,gicr-save-quirk
  arm64: dts: mediatek: mt8192: Add mediatek,gicr-save-quirk
  arm64: dts: mediatek: mt8195: Add mediatek,gicr-save-quirk

 .../interrupt-controller/arm,gic-v3.yaml      |  6 ++++++
 arch/arm64/boot/dts/mediatek/mt8183.dtsi      |  1 +
 arch/arm64/boot/dts/mediatek/mt8186.dtsi      |  1 +
 arch/arm64/boot/dts/mediatek/mt8192.dtsi      |  1 +
 arch/arm64/boot/dts/mediatek/mt8195.dtsi      |  1 +
 drivers/irqchip/irq-gic-common.c              |  8 ++++++--
 drivers/irqchip/irq-gic-common.h              |  1 +
 drivers/irqchip/irq-gic-v3.c                  | 20 +++++++++++++++++++
 8 files changed, 37 insertions(+), 2 deletions(-)

-- 
2.40.1.606.ga4b1b128d6-goog