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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 341FAC433E0 for ; Sat, 13 Jun 2020 08:11:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0B83020739 for ; Sat, 13 Jun 2020 08:11:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726453AbgFMILK (ORCPT ); Sat, 13 Jun 2020 04:11:10 -0400 Received: from mga06.intel.com ([134.134.136.31]:50458 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726451AbgFMILH (ORCPT ); Sat, 13 Jun 2020 04:11:07 -0400 IronPort-SDR: yGPZ1Z7M8oabm0aXoy6aGGKQ/+6/sSPe/D74sp0BcJ56FmQJbC1CnxNH4fQnnVFcERa9AGfi3z HfbAxgCi6MWg== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Jun 2020 01:11:03 -0700 IronPort-SDR: fM8V1pKNSOdeOzjezraxISaiMrF/G1Qs6okKN6PURfaF5grCqmvCOyouy5RjcG/U1dl+ECKQj+ IT2yY/R8U0lg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,506,1583222400"; d="scan'208";a="474467309" Received: from sqa-gate.sh.intel.com (HELO clx-ap-likexu.tsp.org) ([10.239.48.212]) by fmsmga006.fm.intel.com with ESMTP; 13 Jun 2020 01:10:57 -0700 From: Like Xu To: Paolo Bonzini Cc: Peter Zijlstra , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , ak@linux.intel.com, wei.w.wang@intel.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Subject: [PATCH v12 01/11] perf/x86: Fix variable types for LBR registers Date: Sat, 13 Jun 2020 16:09:46 +0800 Message-Id: <20200613080958.132489-2-like.xu@linux.intel.com> X-Mailer: git-send-email 2.21.3 In-Reply-To: <20200613080958.132489-1-like.xu@linux.intel.com> References: <20200613080958.132489-1-like.xu@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Wei Wang The MSR variable type can be 'unsigned int', which uses less memory than the longer 'unsigned long'. Fix 'struct x86_pmu' for that. The lbr_nr won't be a negative number, so make it 'unsigned int' as well. Suggested-by: Peter Zijlstra (Intel) Signed-off-by: Wei Wang --- arch/x86/events/perf_event.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index e17a3d8a47ed..eb37f6c43c96 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -673,8 +673,8 @@ struct x86_pmu { /* * Intel LBR */ - unsigned long lbr_tos, lbr_from, lbr_to; /* MSR base regs */ - int lbr_nr; /* hardware stack size */ + unsigned int lbr_tos, lbr_from, lbr_to, + lbr_nr; /* LBR base regs and size */ u64 lbr_sel_mask; /* LBR_SELECT valid bits */ const int *lbr_sel_map; /* lbr_select mappings */ bool lbr_double_abort; /* duplicated lbr aborts */ -- 2.21.3