Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752465Ab3FXPPJ (ORCPT ); Mon, 24 Jun 2013 11:15:09 -0400 Received: from smtp.codeaurora.org ([198.145.11.231]:59779 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751161Ab3FXPPI (ORCPT ); Mon, 24 Jun 2013 11:15:08 -0400 Message-ID: <51C8627A.5000106@codeaurora.org> Date: Mon, 24 Jun 2013 11:15:06 -0400 From: Christopher Covington User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2 MIME-Version: 1.0 To: Will Deacon CC: "linux-arm-kernel@lists.infradead.org" , Russell King , Catalin Marinas , Nicolas Pitre , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] ARM: Add support for LPAE style CONTEXTIDR References: <1372080405-13365-1-git-send-email-cov@codeaurora.org> <20130624140424.GA24861@mudshark.cambridge.arm.com> <51C85A0D.3070400@codeaurora.org> <20130624145303.GA25582@mudshark.cambridge.arm.com> In-Reply-To: <20130624145303.GA25582@mudshark.cambridge.arm.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1146 Lines: 31 On 06/24/2013 10:53 AM, Will Deacon wrote: > 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. But reading and implementing the architecture *is* winning! LOL. I'll file a ticket with the architecture folks and see what they think. Christopher -- Employee of Qualcomm Innovation Center, Inc. Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation. -- 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/