linux-kernel - Re: [RFC PATCH] ARM: Add imprecise abort enable/disable macro

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Message-ID: <20140210151934.GZ26684@n2100.arm.linux.org.uk>
Date:	Mon, 10 Feb 2014 15:19:34 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Dave Martin <Dave.Martin@....com>
Cc:	Will Deacon <will.deacon@....com>,
	Jonathan Austin <Jonathan.Austin@....com>,
	"nico@...aro.org" <nico@...aro.org>,
	Marc Zyngier <Marc.Zyngier@....com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	"sboyd@...eaurora.org" <sboyd@...eaurora.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"vgupta@...opsys.com" <vgupta@...opsys.com>,
	"ben.dooks@...ethink.co.uk" <ben.dooks@...ethink.co.uk>,
	"u.kleine-koenig@...gutronix.de" <u.kleine-koenig@...gutronix.de>,
	Fabrice Gasnier <fabrice.gasnier@...com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"maxime.coquelin@...com" <maxime.coquelin@...com>
Subject: Re: [RFC PATCH] ARM: Add imprecise abort enable/disable macro

On Mon, Feb 10, 2014 at 02:42:28PM +0000, Dave Martin wrote:
> Should we require CPSR.A to me masked in Booting, for all CPUs that have
> it?

If it's not masked at boot, then there can't be an imprecise exception
pending.

That's unlike interrupts, where a device could trigger an interrupt at
any moment (eg, a timer expiring.)

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