[PATCH v2 0/5] irqchip/gic-v3: Disable pseudo NMIs on Mediatek Chromebooks w/ bad FW

[Matthias Brugger]

On 16/05/2023 11:58, Marc Zyngier wrote:
> On Mon, 15 May 2023 21:13:49 +0100,
> Douglas Anderson <dianders at chromium.org> wrote:
>>
>> 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.
>>
>> v2 fixes the quirk name and also moves the quirk out of the SoC.dtsi
>> file and into the Chromebook file. This, unfortunately, means that
>> mt8186-based Chromebooks are no longer handled since they don't appear
>> to be upstream yet. :(
>>
>> Changes in v2:
>> - "when CPUs are powered" => "when the GIC redistributors are..."
>> - Changed "Fixes" tag.
>> - Moved from mt8183.dtsi to mt8183-kukui.dtsi
>> - Moved from mt8192.dtsi to mt8192-asurada.dtsi
>> - Moved from mt8195.dtsi to mt8195-cherry.dtsi
>> - mediatek,gicr-save-quirk => mediatek,broken-save-restore-fw
>>
>> Douglas Anderson (5):
>>    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,broken-save-restore-fw to
>>      kukui
>>    arm64: dts: mediatek: mt8192: Add mediatek,broken-save-restore-fw to
>>      asurada
>>    arm64: dts: mediatek: mt8195: Add mediatek,broken-save-restore-fw to
>>      cherry
>>
>>   .../interrupt-controller/arm,gic-v3.yaml      |  6 ++++++
>>   .../arm64/boot/dts/mediatek/mt8183-kukui.dtsi |  4 ++++
>>   .../boot/dts/mediatek/mt8192-asurada.dtsi     |  4 ++++
>>   .../boot/dts/mediatek/mt8195-cherry.dtsi      |  4 ++++
>>   drivers/irqchip/irq-gic-common.c              |  8 ++++++--
>>   drivers/irqchip/irq-gic-common.h              |  1 +
>>   drivers/irqchip/irq-gic-v3.c                  | 20 +++++++++++++++++++
>>   7 files changed, 45 insertions(+), 2 deletions(-)
> 
> I'll take the first two patches as fixes. The rest can be merged via
> the soc tree as required.
> 
> 	M.
> 

Patches 3-5 applied now. Thanks!