From patchwork Mon Jul 12 06:03:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 475191 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT 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 70780C07E99 for ; Mon, 12 Jul 2021 08:10:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60482613B2 for ; Mon, 12 Jul 2021 08:10:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351033AbhGLINB (ORCPT ); Mon, 12 Jul 2021 04:13:01 -0400 Received: from mail.kernel.org ([198.145.29.99]:35644 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1355704AbhGLIKO (ORCPT ); Mon, 12 Jul 2021 04:10:14 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id C37EC613DA; Mon, 12 Jul 2021 08:07:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626077246; bh=gwa2l2wOlR4lxQBDKtpMZwjzO1vv8kp3A62dQT1seww=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MtF3w9/YzSzmrMVUV/Vk5JxChonOZBpmMV63a2dDOkWGiszGwCkGVanoXVOc6vA82 CbvSuRr8Am+5sj50pF+BzMp479OYtGbEhRDlFMRL1/VcFiuBXr0HivaAUlBg42lSjt KcqXvB5eGq63sSaLMJHNSM4pTRAsqRkniMsIkAH4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Yasin, Ahmad" , Kan Liang , "Peter Zijlstra (Intel)" Subject: [PATCH 5.12 108/700] perf/x86/intel: Fix instructions:ppp support in Sapphire Rapids Date: Mon, 12 Jul 2021 08:03:11 +0200 Message-Id: <20210712060940.061563438@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060924.797321836@linuxfoundation.org> References: <20210712060924.797321836@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Kan Liang commit 1d5c7880992a06679585e7e568cc679c0c5fd4f2 upstream. Perf errors out when sampling instructions:ppp. $ perf record -e instructions:ppp -- true Error: The sys_perf_event_open() syscall returned with 22 (Invalid argument) for event (instructions:ppp). The instruction PDIR is only available on the fixed counter 0. The event constraint has been updated to fixed0_constraint in icl_get_event_constraints(). The Sapphire Rapids codes unconditionally error out for the event which is not available on the GP counter 0. Make the instructions:ppp an exception. Fixes: 61b985e3e775 ("perf/x86/intel: Add perf core PMU support for Sapphire Rapids") Reported-by: Yasin, Ahmad Signed-off-by: Kan Liang Signed-off-by: Peter Zijlstra (Intel) Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/1624029174-122219-4-git-send-email-kan.liang@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- arch/x86/events/intel/core.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -3975,8 +3975,10 @@ spr_get_event_constraints(struct cpu_hw_ * The :ppp indicates the Precise Distribution (PDist) facility, which * is only supported on the GP counter 0. If a :ppp event which is not * available on the GP counter 0, error out. + * Exception: Instruction PDIR is only available on the fixed counter 0. */ - if (event->attr.precise_ip == 3) { + if ((event->attr.precise_ip == 3) && + !constraint_match(&fixed0_constraint, event->hw.config)) { if (c->idxmsk64 & BIT_ULL(0)) return &counter0_constraint;