Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752459AbbFKFUI (ORCPT ); Thu, 11 Jun 2015 01:20:08 -0400 Received: from e28smtp06.in.ibm.com ([122.248.162.6]:42947 "EHLO e28smtp06.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751353AbbFKFSU (ORCPT ); Thu, 11 Jun 2015 01:18:20 -0400 From: Madhavan Srinivasan To: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: rusty@rustcorp.com.au, Madhavan Srinivasan , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Anton Blanchard , Sukadev Bhattiprolu , Anshuman Khandual , Stephane Eranian Subject: [PATCH v2 6/7]powerpc/powernv: generic nest pmu event functions Date: Thu, 11 Jun 2015 10:47:53 +0530 Message-Id: <1433999874-2043-7-git-send-email-maddy@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1433999874-2043-1-git-send-email-maddy@linux.vnet.ibm.com> References: <1433999874-2043-1-git-send-email-maddy@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15061105-0021-0000-0000-000005B6986D Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4395 Lines: 157 Add generic format attribute and 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: Anshuman Khandual Cc: Stephane Eranian Signed-off-by: Madhavan Srinivasan --- arch/powerpc/perf/nest-pmu.c | 109 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 109 insertions(+) diff --git a/arch/powerpc/perf/nest-pmu.c b/arch/powerpc/perf/nest-pmu.c index 8fad2d9..a662c14 100644 --- a/arch/powerpc/perf/nest-pmu.c +++ b/arch/powerpc/perf/nest-pmu.c @@ -13,6 +13,108 @@ static struct perchip_nest_info p8_perchip_nest_info[P8_MAX_CHIP]; static struct nest_pmu *per_nest_pmu_arr[P8_MAX_NEST_PMUS]; +PMU_FORMAT_ATTR(event, "config:0-20"); +struct attribute *p8_nest_format_attrs[] = { + &format_attr_event.attr, + NULL, +}; + +struct attribute_group p8_nest_format_group = { + .name = "format", + .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_perchip_nest_info[chip_id].vbase; + + return 0; +} + +static void p8_nest_read_counter(struct perf_event *event) +{ + u64 *addr; + u64 data = 0; + + addr = (u64 *)event->hw.event_base; + data = __be64_to_cpu((uint64_t)*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; + uint64_t *addr; + + addr = (u64 *)event->hw.event_base; + counter_prev = local64_read(&event->hw.prev_count); + counter_new = __be64_to_cpu((uint64_t)*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) +{ + event->hw.state = 0; + p8_nest_read_counter(event); +} + +static void p8_nest_event_stop(struct perf_event *event, int flags) +{ + p8_nest_perf_event_update(event); +} + +static int p8_nest_event_add(struct perf_event *event, int flags) +{ + 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; +} + /* * Populate event name and string in attribute */ @@ -106,6 +208,7 @@ static int nest_pmu_create(struct device_node *dev, int pmu_index) /* Save the name to register the PMU with it */ sprintf(buf, "Nest_%s", (char *)pp->value); pmu_ptr->pmu.name = (char *)buf; + pmu_ptr->attr_groups[1] = &p8_nest_format_group; } /* Skip these, we dont need it */ @@ -179,6 +282,12 @@ static int nest_pmu_create(struct device_node *dev, int pmu_index) (struct ppc64_nest_ima_events *)p8_events_arr, idx, pmu_ptr); + update_pmu_ops(pmu_ptr); + + /* Register the pmu */ + perf_pmu_register(&pmu_ptr->pmu, pmu_ptr->pmu.name, -1); + printk(KERN_INFO "Nest PMU %s 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/