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=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 B97C2C3F2D7 for ; Tue, 3 Mar 2020 14:33:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9A03C20838 for ; Tue, 3 Mar 2020 14:33:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729393AbgCCOdZ (ORCPT ); Tue, 3 Mar 2020 09:33:25 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36502 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727576AbgCCOdY (ORCPT ); Tue, 3 Mar 2020 09:33:24 -0500 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 023EQuW7038632 for ; Tue, 3 Mar 2020 09:33:22 -0500 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 2yhr4gjyg0-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 03 Mar 2020 09:33:22 -0500 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 3 Mar 2020 14:33:13 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 023EXBpQ59899988 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 3 Mar 2020 14:33:11 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D6F3FA405B; Tue, 3 Mar 2020 14:33:11 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F3642A4054; Tue, 3 Mar 2020 14:33:00 +0000 (GMT) Received: from [9.199.50.120] (unknown [9.199.50.120]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 3 Mar 2020 14:33:00 +0000 (GMT) Subject: Re: [RFC 02/11] perf/core: Data structure to present hazard data To: Mark Rutland Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, eranian@google.com, peterz@infradead.org, mpe@ellerman.id.au, paulus@samba.org, mingo@redhat.com, acme@kernel.org, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, adrian.hunter@intel.com, ak@linux.intel.com, kan.liang@linux.intel.com, alexey.budankov@linux.intel.com, yao.jin@linux.intel.com, robert.richter@amd.com, kim.phillips@amd.com, maddy@linux.ibm.com, Madhavan Srinivasan , Ravi Bangoria References: <20200302052355.36365-1-ravi.bangoria@linux.ibm.com> <20200302052355.36365-3-ravi.bangoria@linux.ibm.com> <20200302144842.GD56497@lakrids.cambridge.arm.com> From: Ravi Bangoria Date: Tue, 3 Mar 2020 20:02:58 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200302144842.GD56497@lakrids.cambridge.arm.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 20030314-0008-0000-0000-00000358F4F8 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20030314-0009-0000-0000-00004A7A241B Message-Id: <218edf7b-7062-6133-e534-b0d3bd90c2ff@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-03-03_05:2020-03-03,2020-03-03 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 mlxscore=0 phishscore=0 mlxlogscore=999 suspectscore=0 lowpriorityscore=0 impostorscore=0 bulkscore=0 spamscore=0 adultscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2003030110 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/2/20 8:18 PM, Mark Rutland wrote: >> diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h >> index 377d794d3105..ff252618ca93 100644 >> --- a/include/uapi/linux/perf_event.h >> +++ b/include/uapi/linux/perf_event.h >> @@ -142,8 +142,9 @@ enum perf_event_sample_format { >> PERF_SAMPLE_REGS_INTR = 1U << 18, >> PERF_SAMPLE_PHYS_ADDR = 1U << 19, >> PERF_SAMPLE_AUX = 1U << 20, >> + PERF_SAMPLE_PIPELINE_HAZ = 1U << 21, > > Can we please have perf_event_open() reject this sample flag for PMUs > without the new callback (introduced in the next patch)? > > That way it'll be possible to detect whether the PMU exposes this. Sure. Will change it. Ravi