linux-kernel - Re: [PATCH v9 23/26] arm64: Handle serror in NMI context

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Date:   Mon, 28 Jan 2019 12:26:13 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     Julien Thierry <julien.thierry@....com>
Cc:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <daniel.thompson@...aro.org>,
        <joel@...lfernandes.org>, <christoffer.dall@....com>,
        <james.morse@....com>, <catalin.marinas@....com>,
        <will.deacon@....com>, <mark.rutland@....com>,
        Dave Martin <dave.martin@....com>
Subject: Re: [PATCH v9 23/26] arm64: Handle serror in NMI context

On Mon, 21 Jan 2019 15:33:42 +0000,
Julien Thierry <julien.thierry@....com> wrote:
> 
> Per definition of the daifflags, Serrors can occur during any interrupt
> context, that includes NMI contexts. Trying to nmi_enter in an nmi context
> will crash.
> 
> Skip nmi_enter/nmi_exit when serror occurred during an NMI.
> 
> Suggested-by: James Morse <james.morse@....com>
> Signed-off-by: Julien Thierry <julien.thierry@....com>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will.deacon@....com>
> Cc: Mark Rutland <mark.rutland@....com>
> Cc: Dave Martin <dave.martin@....com>
> Cc: James Morse <james.morse@....com>

Acked-by: Marc Zyngier <marc.zyngier@....com>

	M.

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