Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965771AbbKDUqy (ORCPT ); Wed, 4 Nov 2015 15:46:54 -0500 Received: from e28smtp04.in.ibm.com ([122.248.162.4]:56034 "EHLO e28smtp04.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932609AbbKDUqw (ORCPT ); Wed, 4 Nov 2015 15:46:52 -0500 X-Helo: d28dlp01.in.ibm.com X-MailFrom: maddy@linux.vnet.ibm.com X-RcptTo: linux-kernel@vger.kernel.org From: Madhavan Srinivasan To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org Cc: Madhavan Srinivasan , Thomas Gleixner , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , Jiri Olsa , Stephane Eranian , Benjamin Herrenschmidt , Michael Ellerman , Sukadev Bhattiprolu Subject: [RFC PATCH 3/3]perf/powerpc: Functions to update arch_misc_regs Date: Thu, 5 Nov 2015 02:16:18 +0530 Message-Id: <1446669978-6366-4-git-send-email-maddy@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1446669978-6366-1-git-send-email-maddy@linux.vnet.ibm.com> References: <1446669978-6366-1-git-send-email-maddy@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15110420-0013-0000-0000-0000084EFA45 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3377 Lines: 98 Patch adds function to update the arch_misc_reg struct and an arch specific perf_sample_regs_intr() to hook up arch_misc_regs to perf_regs pointer. Also makes perf_sample_regs_intr() in kernel/event/core.c as __weak__ function to make arch specific implementation to replace. Signed-off-by: Madhavan Srinivasan Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Stephane Eranian Cc: Benjamin Herrenschmidt Cc: Michael Ellerman Cc: Sukadev Bhattiprolu --- Would really appreciate comments and feedback for the patch arch/powerpc/perf/core-book3s.c | 29 +++++++++++++++++++++++++++++ kernel/events/core.c | 2 +- 2 files changed, 30 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c index b0382f3f1095..508c181c163f 100644 --- a/arch/powerpc/perf/core-book3s.c +++ b/arch/powerpc/perf/core-book3s.c @@ -57,6 +57,7 @@ struct cpu_hw_events { void *bhrb_context; struct perf_branch_stack bhrb_stack; struct perf_branch_entry bhrb_entries[BHRB_MAX_ENTRIES]; + struct arch_misc_regs arch_regs; }; static DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events); @@ -1904,6 +1905,28 @@ ssize_t power_events_sysfs_show(struct device *dev, return sprintf(page, "event=0x%02llx\n", pmu_attr->id); } +void perf_sample_regs_intr(struct perf_regs *regs_intr, struct pt_regs *regs) +{ + struct cpu_hw_events *cpuhw; + cpuhw = this_cpu_ptr(&cpu_hw_events); + + regs_intr->regs = regs; + regs_intr->arch_regs = &cpuhw->arch_regs; + regs_intr->abi = perf_reg_abi(current); +} + +static void power_arch_misc_regs(struct arch_misc_regs *regs) +{ + regs->pmc1 = mfspr(SPRN_PMC1); + regs->pmc2 = mfspr(SPRN_PMC2); + regs->pmc3 = mfspr(SPRN_PMC3); + regs->pmc4 = mfspr(SPRN_PMC4); + regs->pmc5 = mfspr(SPRN_PMC5); + regs->pmc6 = mfspr(SPRN_PMC6); + regs->mmcr0 = mfspr(SPRN_MMCR0); + regs->mmcr1 = mfspr(SPRN_MMCR1); +} + static struct pmu power_pmu = { .pmu_enable = power_pmu_enable, .pmu_disable = power_pmu_disable, @@ -1985,6 +2008,12 @@ static void record_and_restart(struct perf_event *event, unsigned long val, data.br_stack = &cpuhw->bhrb_stack; } + if (event->attr.sample_type & PERF_SAMPLE_REGS_INTR) { + struct cpu_hw_events *cpuhw; + cpuhw = this_cpu_ptr(&cpu_hw_events); + power_arch_misc_regs(&cpuhw->arch_regs); + } + if (perf_event_overflow(event, &data, regs)) power_pmu_stop(event, 0); } diff --git a/kernel/events/core.c b/kernel/events/core.c index c04bdad3d365..9567be72da5a 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -4962,7 +4962,7 @@ static void perf_sample_regs_user(struct perf_regs *regs_user, } } -static void perf_sample_regs_intr(struct perf_regs *regs_intr, +void __attribute__((weak)) perf_sample_regs_intr(struct perf_regs *regs_intr, struct pt_regs *regs) { regs_intr->regs = regs; -- 1.9.1 -- 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/