Date: Mon, 24 Jun 2013 15:53:03 +0100
From: Will Deacon <will.deacon@arm.com>
To: Christopher Covington <cov@codeaurora.org>
Cc: "linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
        Russell King <linux@arm.linux.org.uk>,
        Catalin Marinas <Catalin.Marinas@arm.com>,
        Nicolas Pitre <nico@linaro.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ARM: Add support for LPAE style CONTEXTIDR
Message-ID: <20130624145303.GA25582@mudshark.cambridge.arm.com>
References: <1372080405-13365-1-git-send-email-cov@codeaurora.org>
 <20130624140424.GA24861@mudshark.cambridge.arm.com>
 <51C85A0D.3070400@codeaurora.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <51C85A0D.3070400@codeaurora.org>
User-Agent: Mutt/1.5.21 (2010-09-15)
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 794
Lines: 22

On Mon, Jun 24, 2013 at 03:39:09PM +0100, Christopher Covington wrote:
> Hi Will,
> 
> On 06/24/2013 10:04 AM, Will Deacon wrote:
> [...]
> 
> > What's the advantage of this approach, other than you get an extra byte's
> > worth of PID?
> 
> In my view, the real advantage is that the the PID is located where people
> reading ARM Architecture Reference Manual are told they can find it.

Perhaps, but I'd usually expect a debugger or trace tools to do something
with the PID, and they likely expect it to be shifted, so you can't really
win.

Will
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/