Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752116AbbHCHg1 (ORCPT ); Mon, 3 Aug 2015 03:36:27 -0400 Received: from e28smtp03.in.ibm.com ([122.248.162.3]:56806 "EHLO e28smtp03.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751255AbbHCHgU (ORCPT ); Mon, 3 Aug 2015 03:36:20 -0400 X-Helo: d28dlp02.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 Cc: Madhavan Srinivasan , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Anton Blanchard , Sukadev Bhattiprolu , Daniel Axtens , Stephane Eranian Subject: [PATCH v7 6/7] powerpc/powernv: generic nest pmu event functions Date: Mon, 3 Aug 2015 13:05:58 +0530 Message-Id: <1438587359-6165-7-git-send-email-maddy@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1438587359-6165-1-git-send-email-maddy@linux.vnet.ibm.com> References: <1438587359-6165-1-git-send-email-maddy@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15080307-0009-0000-0000-000006DDF1E9 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3896 Lines: 142 Add set of generic nest pmu related event functions to be used by each nest pmu. Add code to register nest pmus. Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Anton Blanchard Cc: Sukadev Bhattiprolu Cc: Daniel Axtens Cc: Stephane Eranian Signed-off-by: Madhavan Srinivasan --- arch/powerpc/perf/nest-pmu.c | 101 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 101 insertions(+) diff --git a/arch/powerpc/perf/nest-pmu.c b/arch/powerpc/perf/nest-pmu.c index 4a74ffb97741..f653a7ab6ed7 100644 --- a/arch/powerpc/perf/nest-pmu.c +++ b/arch/powerpc/perf/nest-pmu.c @@ -24,6 +24,97 @@ static struct attribute_group p8_nest_format_group = { .attrs = p8_nest_format_attrs, }; +static int p8_nest_event_init(struct perf_event *event) +{ + int chip_id; + + if (event->attr.type != event->pmu->type) + return -ENOENT; + + /* Sampling not supported yet */ + if (event->hw.sample_period) + return -EINVAL; + + /* unsupported modes and filters */ + if (event->attr.exclude_user || + event->attr.exclude_kernel || + event->attr.exclude_hv || + event->attr.exclude_idle || + event->attr.exclude_host || + event->attr.exclude_guest) + return -EINVAL; + + if (event->cpu < 0) + return -EINVAL; + + chip_id = topology_physical_package_id(event->cpu); + event->hw.event_base = event->attr.config + + p8_nest_perchip_info[chip_id].vbase; + + return 0; +} + +static void p8_nest_read_counter(struct perf_event *event) +{ + u64 *addr, data; + + addr = (u64 *)event->hw.event_base; + data = __be64_to_cpu(*addr); + local64_set(&event->hw.prev_count, data); +} + +static void p8_nest_perf_event_update(struct perf_event *event) +{ + u64 counter_prev, counter_new, final_count, *addr; + + addr = (u64 *)event->hw.event_base; + counter_prev = local64_read(&event->hw.prev_count); + counter_new = __be64_to_cpu(*addr); + final_count = counter_new - counter_prev; + + local64_set(&event->hw.prev_count, counter_new); + local64_add(final_count, &event->count); +} + +static void p8_nest_event_start(struct perf_event *event, int flags) +{ + p8_nest_read_counter(event); +} + +static void p8_nest_event_stop(struct perf_event *event, int flags) +{ + if (flags & PERF_EF_UPDATE) + p8_nest_perf_event_update(event); +} + +static int p8_nest_event_add(struct perf_event *event, int flags) +{ + if (flags & PERF_EF_START) + p8_nest_event_start(event, flags); + + return 0; +} + +/* + * Populate pmu ops in the structure + */ +static int update_pmu_ops(struct nest_pmu *pmu) +{ + if (!pmu) + return -EINVAL; + + pmu->pmu.task_ctx_nr = perf_invalid_context; + pmu->pmu.event_init = p8_nest_event_init; + pmu->pmu.add = p8_nest_event_add; + pmu->pmu.del = p8_nest_event_stop; + pmu->pmu.start = p8_nest_event_start; + pmu->pmu.stop = p8_nest_event_stop; + pmu->pmu.read = p8_nest_perf_event_update; + pmu->pmu.attr_groups = pmu->attr_groups; + + return 0; +} + static int nest_event_info(char *name, struct nest_ima_events *p8_events) { char *buf; @@ -197,6 +288,16 @@ static int nest_pmu_create(struct device_node *dev, int pmu_index) update_events_in_group(p8_events, idx, pmu_ptr); + update_pmu_ops(pmu_ptr); + /* Register the pmu */ + ret = perf_pmu_register(&pmu_ptr->pmu, pmu_ptr->pmu.name, -1); + if (ret) { + pr_err("Nest PMU %s Register failed\n", pmu_ptr->pmu.name); + return ret; + } + + pr_info("%s performance monitor hardware support registered\n", + pmu_ptr->pmu.name); return 0; } -- 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/