linux-kernel - Re: [PATCH v9 25/26] arm64: Skip irqflags tracing for NMI in IRQs disabled context

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Message-ID: <86pnshuf9d.wl-marc.zyngier@arm.com>
Date:   Mon, 28 Jan 2019 12:40:30 +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>
Subject: Re: [PATCH v9 25/26] arm64: Skip irqflags tracing for NMI in IRQs disabled context

On Mon, 21 Jan 2019 15:33:44 +0000,
Julien Thierry <julien.thierry@....com> wrote:
> 
> When an NMI is raised while interrupts where disabled, the IRQ tracing
> already is in the correct state (i.e. hardirqs_off) and should be left
> as such when returning to the interrupted context.
> 
> Check whether PMR was masking interrupts when the NMI was raised and
> skip IRQ tracing if necessary.
> 
> Signed-off-by: Julien Thierry <julien.thierry@....com>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Will Deacon <will.deacon@....com>
> Cc: Marc Zyngier <marc.zyngier@....com>

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

	M.

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