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Subject: Re: [PATCH v3 08/16] irqchip/gic: Configure SGIs as standard
 interrupts
To:     Marc Zyngier <maz@kernel.org>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc:     Will Deacon <will@kernel.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Russell King <linux@arm.linux.org.uk>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Sumit Garg <sumit.garg@linaro.org>,
        Valentin Schneider <Valentin.Schneider@arm.com>,
        Florian Fainelli <f.fainelli@gmail.com>,
        Gregory Clement <gregory.clement@bootlin.com>,
        Andrew Lunn <andrew@lunn.ch>,
        Saravana Kannan <saravanak@google.com>,
        kernel-team@android.com,
        'Linux Samsung SOC' <linux-samsung-soc@vger.kernel.org>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
From:   Marek Szyprowski <m.szyprowski@samsung.com>
Message-ID: <a917082d-4bfd-a6fd-db88-36e75f5f5921@samsung.com>
Date:   Mon, 14 Sep 2020 15:06:00 +0200
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Hi Marc,

On 01.09.2020 16:43, Marc Zyngier wrote:
> Change the way we deal with GIC SGIs by turning them into proper
> IRQs, and calling into the arch code to register the interrupt range
> instead of a callback.
>
> Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
This patch landed in linux next-20200914 as commit ac063232d4b0 
("irqchip/gic: Configure SGIs as standard interrupts"). Sadly it breaks 
booting of all Samsung Exynos 4210/4412 based boards (dual/quad ARM 
Cortex A9 based). Here are the last lines from the bootlog:

[    0.106322] CPU: Testing write buffer coherency: ok
[    0.109895] CPU0: Spectre v2: using BPIALL workaround
[    0.116057] CPU0: thread -1, cpu 0, socket 9, mpidr 80000900
[    0.123885] Setting up static identity map for 0x40100000 - 0x40100060
[    0.130191] rcu: Hierarchical SRCU implementation.
[    0.137195] soc soc0: Exynos: CPU[EXYNOS4210] PRO_ID[0x43210211] 
REV[0x11] Detected
[    0.145129] smp: Bringing up secondary CPUs ...
[    0.156279] CPU1: thread -1, cpu 1, socket 9, mpidr 80000901
[    0.156291] CPU1: Spectre v2: using BPIALL workaround
[    2.716379] random: fast init done

> ---
>   drivers/irqchip/irq-gic.c | 103 +++++++++++++++++++++++---------------
>   1 file changed, 63 insertions(+), 40 deletions(-)
>
> ...

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland