From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.5 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 936A1C433E1 for ; Wed, 15 Jul 2020 08:25:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 68D5920657 for ; Wed, 15 Jul 2020 08:25:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729799AbgGOIZI (ORCPT ); Wed, 15 Jul 2020 04:25:08 -0400 Received: from lhrrgout.huawei.com ([185.176.76.210]:2481 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729792AbgGOIZH (ORCPT ); Wed, 15 Jul 2020 04:25:07 -0400 Received: from lhreml724-chm.china.huawei.com (unknown [172.18.7.108]) by Forcepoint Email with ESMTP id 5B634C3BD6AD20BE046F; Wed, 15 Jul 2020 09:25:06 +0100 (IST) Received: from [127.0.0.1] (10.47.6.38) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1913.5; Wed, 15 Jul 2020 09:25:05 +0100 Subject: Re: [PATCH] drivers/perf: hisi: Add identifier sysfs file To: Will Deacon CC: , , , , , , References: <1592399111-134786-1-git-send-email-john.garry@huawei.com> <20200714083216.GD4516@willie-the-truck> From: John Garry Message-ID: <67db3c30-5aaf-ac17-0256-950494f5ba88@huawei.com> Date: Wed, 15 Jul 2020 09:23:19 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.1.2 MIME-Version: 1.0 In-Reply-To: <20200714083216.GD4516@willie-the-truck> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.47.6.38] X-ClientProxiedBy: lhreml728-chm.china.huawei.com (10.201.108.79) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Will, > > On Wed, Jun 17, 2020 at 09:05:11PM +0800, John Garry wrote: >> To allow userspace to identify the specific implementation of the device, >> add an "identifier" sysfs file. >> >> Encoding is as follows: >> hi1620: 0x0 (aka hip08) >> hi1630: 0x30 >> >> Signed-off-by: John Garry > > I'm struggling a bit to track this. If you still think it's worth pursuing, > please could you post a series with a cover-letter describing what this is > for, a link to the userspace changes and then patches for all the PMU > drivers that need updating? There is no hi1630 userspace support yet. So what I can do is post updated userspace support (including hi1630), and then post kernel parts together for all drivers we could initially support. @Joakim, I'll pick your imx driver changes here, if you don't mind. There was an RFC from you for the SMMUv3 PMU as > well, and also some other "arm64" changes. > I hope to drop that RFC if an updated SMMUv3 spec helps us out. Cheers, John