linux-kernel - Re: [PATCH v4 5/5] irqchip, gicv3-its: Workaround for Cavium ThunderX errata 22375, 24313

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Message-ID: <20150918083343.GY1820@rric.localdomain>
Date:	Fri, 18 Sep 2015 10:33:43 +0200
From:	Robert Richter <robert.richter@...iumnetworks.com>
To:	Marc Zyngier <marc.zyngier@....com>
CC:	Robert Richter <rric@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Tirumalesh Chalamarla <tchalamarla@...ium.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v4 5/5] irqchip, gicv3-its: Workaround for Cavium
 ThunderX errata 22375, 24313

On 07.09.15 17:32:25, Marc Zyngier wrote:
> On 14/08/15 19:28, Robert Richter wrote:

> > +	if (its->flags & ITS_FLAGS_CAVIUM_THUNDERX) {
> > +		/*
> > +		 * erratum 22375: only alloc 8MB table size
> > +		 * erratum 24313: ignore memory access type
> > +		 */
> > +		cache	= 0;
> > +		ids	= 0x13;			/* 20 bits, 8MB */
> > +	} else {
> 
> You can move the typer definition here, as it is only used here.
> 
> > +		cache	= GITS_BASER_WaWb;
> > +		typer	= readq_relaxed(its->base + GITS_TYPER);
> > +		ids	= GITS_TYPER_DEVBITS(typer);
> > +	}

I am dropping this change as this would raise merge conflicts with
others, e.g. KVM patches.

-Robert
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