Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932648AbbHJSTL (ORCPT ); Mon, 10 Aug 2015 14:19:11 -0400 Received: from mx1.redhat.com ([209.132.183.28]:40348 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932351AbbHJSTG (ORCPT ); Mon, 10 Aug 2015 14:19:06 -0400 Message-ID: <55C8EB17.7090708@redhat.com> Date: Mon, 10 Aug 2015 19:19:03 +0100 From: Andrew Haley User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.8.0 MIME-Version: 1.0 To: "Suzuki K. Poulose" , Catalin Marinas CC: "linux-arm-kernel@lists.infradead.org" , Mark Rutland , Will Deacon , "linux-kernel@vger.kernel.org" , "edward.nevill@linaro.org" Subject: Re: [RFC PATCH 01/10] arm64: feature registers: Documentation References: <1437731037-25795-1-git-send-email-suzuki.poulose@arm.com> <1437731037-25795-2-git-send-email-suzuki.poulose@arm.com> <20150810160636.GB15394@e104818-lin.cambridge.arm.com> <55C8E12E.6030305@arm.com> In-Reply-To: <55C8E12E.6030305@arm.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1410 Lines: 38 On 08/10/2015 06:36 PM, Suzuki K. Poulose wrote: > On 10/08/15 17:06, Catalin Marinas wrote: >> Hi Suzuki, >> >> On Fri, Jul 24, 2015 at 10:43:47AM +0100, Suzuki K. Poulose wrote: >>> From: "Suzuki K. Poulose" >>> >>> Documentation of the infrastructure >>> >>> Signed-off-by: Suzuki K. Poulose >> >> The implementation looks fine but I think the main discussion will be >> around the goal of this feature and the ABI that it introduces. So I'll >> just write my thoughts on this patch (I could as well have replied to >> the cover letter). >> >> Another question: who's going to use this feature? I know people asked >> in private but I'd like to have some public statements. > > Right, I am hoping that folks from glibc / JIT / GCC will respond to > this thread. We certainly need it for OpenJDK. We need to know the manufacturer, part number, revision id, etc. We already have workarounds in OpenJDK for various bugs, and we also can generate better code if we know the exact part. I note that the REVIDR is not in this patch. That seems odd, because it can be used to identify minor revisions. Andrew. -- 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/