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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 2B4D7C282C4 for ; Mon, 4 Feb 2019 16:13:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 054C1205C9 for ; Mon, 4 Feb 2019 16:13:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731667AbfBDQNr (ORCPT ); Mon, 4 Feb 2019 11:13:47 -0500 Received: from mga05.intel.com ([192.55.52.43]:5597 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726979AbfBDQNr (ORCPT ); Mon, 4 Feb 2019 11:13:47 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 04 Feb 2019 08:13:46 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,560,1539673200"; d="scan'208";a="317538500" Received: from tassilo.jf.intel.com (HELO tassilo.localdomain) ([10.7.201.137]) by fmsmga005.fm.intel.com with ESMTP; 04 Feb 2019 08:13:46 -0800 Received: by tassilo.localdomain (Postfix, from userid 1000) id 5496E301247; Mon, 4 Feb 2019 08:13:46 -0800 (PST) Date: Mon, 4 Feb 2019 08:13:46 -0800 From: Andi Kleen To: "Liang, Kan" Cc: Peter Zijlstra , x86@kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de, bp@alien8.de, mingo@redhat.com, eranian@google.com Subject: Re: [PATCH V6 2/5] perf/x86/kvm: Avoid unnecessary work in guest filtering Message-ID: <20190204161346.GC31598@tassilo.jf.intel.com> References: <1548106951-4811-1-git-send-email-kan.liang@linux.intel.com> <1548106951-4811-2-git-send-email-kan.liang@linux.intel.com> <20190204153827.GG17528@hirez.programming.kicks-ass.net> <20190204154411.GC17582@hirez.programming.kicks-ass.net> <90e071c0-cdf4-3a31-4e44-2c5b84af5fa3@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <90e071c0-cdf4-3a31-4e44-2c5b84af5fa3@linux.intel.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > As my understanding, the microcode version for each stepping is independent > and irrelevant. The 0x0000004e should be just coincidence. > If so, I don't think X86_STEPPING_ANY is very useful. > > Andi, if I'm wrong please correct me. Yes that's right. You cannot match microcode without stepping. -Andi