From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753284Ab1AZH03 (ORCPT ); Wed, 26 Jan 2011 02:26:29 -0500 Received: from hera.kernel.org ([140.211.167.34]:52972 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753186Ab1AZH02 (ORCPT ); Wed, 26 Jan 2011 02:26:28 -0500 Date: Wed, 26 Jan 2011 07:26:00 GMT From: tip-bot for Stephane Eranian Cc: linux-kernel@vger.kernel.org, eranian@google.com, hpa@zytor.com, mingo@redhat.com, gorcunov@openvz.org, tglx@linutronix.de, mingo@elte.hu Reply-To: mingo@redhat.com, hpa@zytor.com, eranian@google.com, linux-kernel@vger.kernel.org, gorcunov@openvz.org, tglx@linutronix.de, mingo@elte.hu In-Reply-To: <4d3efb2f.1252d80a.1a80.ffffc83f@mx.google.com> References: <4d3efb2f.1252d80a.1a80.ffffc83f@mx.google.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/urgent] perf: Fix Pentium4 raw event validation Message-ID: Git-Commit-ID: 3284063535adb5ca02e7ad51d7556193fb8e799e X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (hera.kernel.org [127.0.0.1]); Wed, 26 Jan 2011 07:26:01 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 3284063535adb5ca02e7ad51d7556193fb8e799e Gitweb: http://git.kernel.org/tip/3284063535adb5ca02e7ad51d7556193fb8e799e Author: Stephane Eranian AuthorDate: Tue, 25 Jan 2011 17:32:01 +0200 Committer: Ingo Molnar CommitDate: Wed, 26 Jan 2011 08:01:20 +0100 perf: Fix Pentium4 raw event validation This patch fixes some issues with raw event validation on Pentium 4 (Netburst) based processors. As I was testing libpfm4 Netburst support, I ran into two problems in the p4_validate_raw_event() function: - the shared field must be checked ONLY when HT is on - the binding to ESCR register was missing The second item was causing raw events to not be encoded correctly compared to generic PMU events. With this patch, I can now pass Netburst events to libpfm4 examples and get meaningful results: $ task -e global_power_events:running:u noploop 1 noploop for 1 seconds 3,206,304,898 global_power_events:running Signed-off-by: Stephane Eranian Acked-by: Cyrill Gorcunov Cc: peterz@infradead.org Cc: paulus@samba.org Cc: davem@davemloft.net Cc: fweisbec@gmail.com Cc: perfmon2-devel@lists.sf.net Cc: eranian@gmail.com Cc: robert.richter@amd.com Cc: acme@redhat.com Cc: gorcunov@gmail.com Cc: ming.m.lin@intel.com LKML-Reference: <4d3efb2f.1252d80a.1a80.ffffc83f@mx.google.com> Signed-off-by: Ingo Molnar --- arch/x86/kernel/cpu/perf_event_p4.c | 12 ++++++++++-- 1 files changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c index e56b9bf..f7a0993 100644 --- a/arch/x86/kernel/cpu/perf_event_p4.c +++ b/arch/x86/kernel/cpu/perf_event_p4.c @@ -682,7 +682,7 @@ static int p4_validate_raw_event(struct perf_event *event) * if an event is shared accross the logical threads * the user needs special permissions to be able to use it */ - if (p4_event_bind_map[v].shared) { + if (p4_ht_active() && p4_event_bind_map[v].shared) { if (perf_paranoid_cpu() && !capable(CAP_SYS_ADMIN)) return -EACCES; } @@ -727,7 +727,8 @@ static int p4_hw_config(struct perf_event *event) event->hw.config = p4_set_ht_bit(event->hw.config); if (event->attr.type == PERF_TYPE_RAW) { - + struct p4_event_bind *bind; + unsigned int esel; /* * Clear bits we reserve to be managed by kernel itself * and never allowed from a user space @@ -743,6 +744,13 @@ static int p4_hw_config(struct perf_event *event) * bits since we keep additional info here (for cache events and etc) */ event->hw.config |= event->attr.config; + bind = p4_config_get_bind(event->attr.config); + if (!bind) { + rc = -EINVAL; + goto out; + } + esel = P4_OPCODE_ESEL(bind->opcode); + event->hw.config |= p4_config_pack_cccr(P4_CCCR_ESEL(esel)); } rc = x86_setup_perfctr(event);