From: Arnd Bergmann <arnd@arndb.de>
To: "hasegawa-hitomi@fujitsu.com" <hasegawa-hitomi@fujitsu.com>
Cc: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"jirislaby@kernel.org" <jirislaby@kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
SoC Team <soc@kernel.org>, Olof Johansson <olof@lixom.net>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Sumit Garg <sumit.garg@linaro.org>
Subject: Re: [PATCH] soc: fujitsu: Add A64FX diagnostic interrupt driver
Date: Fri, 25 Feb 2022 12:20:31 +0100 [thread overview]
Message-ID: <CAK8P3a0T1eP9a_1UhYRg0wHBsjyLLORoKB+44PAPM4zj3ryVcA@mail.gmail.com> (raw)
In-Reply-To: <OSZPR01MB7050EF799D97D05A8C4597E7EB3E9@OSZPR01MB7050.jpnprd01.prod.outlook.com>
On Fri, Feb 25, 2022 at 11:35 AM hasegawa-hitomi@fujitsu.com
<hasegawa-hitomi@fujitsu.com> wrote:
>
> Hi Greg and Jiri,
>
> I'm trying to implement a feature for A64FX that will panic when
> a diagnostic interrupt is received.
> Arnd suggested that handle_sysrq() should be used
> but I'm wonderingif it's ok to call it in NMI.
> Would you please let me know if we can call handle_sysrq() in NMI?
I see some work from Sumit Garg to make it possible, but this was never
merged, so presumably it is not safe:
https://lore.kernel.org/linux-arm-kernel/CAFA6WYOWHgmYYt=KGXDh2hKiuy_rQbJfi279ev0+s-Qh7L21kA@mail.gmail.com/t/#m2b5006f08581448020eb24566927a104d0b95c44
Sumit has worked on some related areas as well, and may have additional
ideas for you.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: "hasegawa-hitomi@fujitsu.com" <hasegawa-hitomi@fujitsu.com>
Cc: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"jirislaby@kernel.org" <jirislaby@kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
SoC Team <soc@kernel.org>, Olof Johansson <olof@lixom.net>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Sumit Garg <sumit.garg@linaro.org>
Subject: Re: [PATCH] soc: fujitsu: Add A64FX diagnostic interrupt driver
Date: Fri, 25 Feb 2022 12:20:31 +0100 [thread overview]
Message-ID: <CAK8P3a0T1eP9a_1UhYRg0wHBsjyLLORoKB+44PAPM4zj3ryVcA@mail.gmail.com> (raw)
In-Reply-To: <OSZPR01MB7050EF799D97D05A8C4597E7EB3E9@OSZPR01MB7050.jpnprd01.prod.outlook.com>
On Fri, Feb 25, 2022 at 11:35 AM hasegawa-hitomi@fujitsu.com
<hasegawa-hitomi@fujitsu.com> wrote:
>
> Hi Greg and Jiri,
>
> I'm trying to implement a feature for A64FX that will panic when
> a diagnostic interrupt is received.
> Arnd suggested that handle_sysrq() should be used
> but I'm wonderingif it's ok to call it in NMI.
> Would you please let me know if we can call handle_sysrq() in NMI?
I see some work from Sumit Garg to make it possible, but this was never
merged, so presumably it is not safe:
https://lore.kernel.org/linux-arm-kernel/CAFA6WYOWHgmYYt=KGXDh2hKiuy_rQbJfi279ev0+s-Qh7L21kA@mail.gmail.com/t/#m2b5006f08581448020eb24566927a104d0b95c44
Sumit has worked on some related areas as well, and may have additional
ideas for you.
Arnd
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next prev parent reply other threads:[~2022-02-25 11:20 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-18 9:20 [PATCH] soc: fujitsu: Add A64FX diagnostic interrupt driver Hitomi Hasegawa
2022-02-18 9:20 ` Hitomi Hasegawa
2022-02-18 10:35 ` Arnd Bergmann
2022-02-18 10:35 ` Arnd Bergmann
2022-02-22 10:52 ` hasegawa-hitomi
2022-02-22 10:52 ` hasegawa-hitomi
2022-02-25 10:35 ` hasegawa-hitomi
2022-02-25 10:35 ` hasegawa-hitomi
2022-02-25 10:51 ` gregkh
2022-02-25 10:51 ` gregkh
2022-02-25 11:20 ` Arnd Bergmann [this message]
2022-02-25 11:20 ` Arnd Bergmann
2022-02-28 8:05 ` Sumit Garg
2022-02-28 8:05 ` Sumit Garg
2022-02-28 8:51 ` hasegawa-hitomi
2022-02-28 8:51 ` hasegawa-hitomi
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