Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757081Ab3C1RDB (ORCPT ); Thu, 28 Mar 2013 13:03:01 -0400 Received: from merlin.infradead.org ([205.233.59.134]:36299 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755844Ab3C1RCv (ORCPT ); Thu, 28 Mar 2013 13:02:51 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Andi Kleen , Stephane Eranian , peterz@infradead.org, acme@redhat.com, jolsa@redhat.com, namhyung.kim@lge.com Subject: [PATCH 15/36] perf/x86: Support CPU specific sysfs events Date: Thu, 28 Mar 2013 14:02:15 -0300 Message-Id: <1364490156-32064-16-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.8.1.1.361.gec3ae6e In-Reply-To: <1364490156-32064-1-git-send-email-acme@infradead.org> References: <1364490156-32064-1-git-send-email-acme@infradead.org> Content-Type: text/plain; charset="utf-8" X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2818 Lines: 94 From: Andi Kleen Add a way for the CPU initialization code to register additional events, and merge them into the events attribute directory. Used in the next patch. Signed-off-by: Andi Kleen Signed-off-by: Stephane Eranian Cc: peterz@infradead.org Cc: acme@redhat.com Cc: jolsa@redhat.com Cc: namhyung.kim@lge.com Link: http://lkml.kernel.org/r/1359040242-8269-2-git-send-email-eranian@google.com [ small cleanups ] Signed-off-by: Ingo Molnar [ merge_attr returns a **, not just * ] Signed-off-by: Arnaldo Carvalho de Melo --- arch/x86/kernel/cpu/perf_event.c | 34 ++++++++++++++++++++++++++++++++++ arch/x86/kernel/cpu/perf_event.h | 1 + 2 files changed, 35 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index bf0f01a..c886dc8 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -1330,6 +1330,32 @@ static void __init filter_events(struct attribute **attrs) } } +/* Merge two pointer arrays */ +static __init struct attribute **merge_attr(struct attribute **a, struct attribute **b) +{ + struct attribute **new; + int j, i; + + for (j = 0; a[j]; j++) + ; + for (i = 0; b[i]; i++) + j++; + j++; + + new = kmalloc(sizeof(struct attribute *) * j, GFP_KERNEL); + if (!new) + return NULL; + + j = 0; + for (i = 0; a[i]; i++) + new[j++] = a[i]; + for (i = 0; b[i]; i++) + new[j++] = b[i]; + new[j] = NULL; + + return new; +} + static ssize_t events_sysfs_show(struct device *dev, struct device_attribute *attr, char *page) { @@ -1469,6 +1495,14 @@ static int __init init_hw_perf_events(void) else filter_events(x86_pmu_events_group.attrs); + if (x86_pmu.cpu_events) { + struct attribute **tmp; + + tmp = merge_attr(x86_pmu_events_group.attrs, x86_pmu.cpu_events); + if (!WARN_ON(!tmp)) + x86_pmu_events_group.attrs = tmp; + } + pr_info("... version: %d\n", x86_pmu.version); pr_info("... bit width: %d\n", x86_pmu.cntval_bits); pr_info("... generic registers: %d\n", x86_pmu.num_counters); diff --git a/arch/x86/kernel/cpu/perf_event.h b/arch/x86/kernel/cpu/perf_event.h index 7f5c75c..95152c1 100644 --- a/arch/x86/kernel/cpu/perf_event.h +++ b/arch/x86/kernel/cpu/perf_event.h @@ -357,6 +357,7 @@ struct x86_pmu { struct attribute **format_attrs; ssize_t (*events_sysfs_show)(char *page, u64 config); + struct attribute **cpu_events; /* * CPU Hotplug hooks -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/