From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755544AbZEKK36 (ORCPT ); Mon, 11 May 2009 06:29:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752315AbZEKK3s (ORCPT ); Mon, 11 May 2009 06:29:48 -0400 Received: from hera.kernel.org ([140.211.167.34]:59675 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751024AbZEKK3s (ORCPT ); Mon, 11 May 2009 06:29:48 -0400 Subject: Re: [tip:perfcounters/core] perf_counter, x86: remove X86_FEATURE_ARCH_PERFMON flag for AMD cpus From: Jaswinder Singh Rajput To: Ingo Molnar Cc: mingo@redhat.com, hpa@zytor.com, paulus@samba.org, linux-kernel@vger.kernel.org, robert.richter@amd.com, a.p.zijlstra@chello.nl, tglx@linutronix.de, linux-tip-commits@vger.kernel.org In-Reply-To: <20090511100226.GA31041@elte.hu> References: <1241002046-8832-2-git-send-email-robert.richter@amd.com> <1241931753.4796.15.camel@localhost.localdomain> <1241934795.4796.55.camel@localhost.localdomain> <20090510063047.GD30778@elte.hu> <1241938310.4796.67.camel@localhost.localdomain> <20090511100226.GA31041@elte.hu> Content-Type: text/plain Date: Mon, 11 May 2009 15:57:32 +0530 Message-Id: <1242037652.3114.6.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.24.5 (2.24.5-1.fc10) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2009-05-11 at 12:02 +0200, Ingo Molnar wrote: > * Jaswinder Singh Rajput wrote: > > > There is one more way to check performance monitor support for > > Intel by using IA32_MISC_ENABLE MSR (0x1A0) bit 7 tells whether > > performance monitoring is available or not. > > > > But IA32_MISC_ENABLE MSR (0x1A0) is not available for Pentium and > > P6. > > > > So better I will add new cpufeature for performance monitoring for > > x86: > > > > X86_FEATURE_PERFMON : Performance monitor support > > What is the exact wording of IA32_MISC_ENABLE bit 7 in the Intel > documents? > Bit 7: Performance Monitoring Available. (R) 1 = Performance monitoring enabled 0 = Performance monitoring disabled -- JSR