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Date: Mon, 11 Apr 2022 18:19:48 +0100
From: John Garry <john.garry@...wei.com>
To: Yicong Yang <yangyicong@...ilicon.com>,
<gregkh@...uxfoundation.org>, <helgaas@...nel.org>,
<alexander.shishkin@...ux.intel.com>, <lorenzo.pieralisi@....com>,
<will@...nel.org>, <mark.rutland@....com>,
<mathieu.poirier@...aro.org>, <suzuki.poulose@....com>,
<mike.leach@...aro.org>, <leo.yan@...aro.org>,
<jonathan.cameron@...wei.com>, <daniel.thompson@...aro.org>,
<joro@...tes.org>, <shameerali.kolothum.thodi@...wei.com>,
<robin.murphy@....com>, <peterz@...radead.org>, <mingo@...hat.com>,
<acme@...nel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<coresight@...ts.linaro.org>, <linux-pci@...r.kernel.org>,
<linux-perf-users@...r.kernel.org>,
<iommu@...ts.linux-foundation.org>
CC: <prime.zeng@...wei.com>, <liuqi115@...wei.com>,
<zhangshaokun@...ilicon.com>, <linuxarm@...wei.com>
Subject: Re: [PATCH v7 5/7] perf tool: Add support for HiSilicon PCIe Tune and
Trace device driver
On 07/04/2022 13:58, Yicong Yang wrote:
> From: Qi Liu <liuqi115@...wei.com>
>
> 'perf record' and 'perf report --dump-raw-trace' supported in this
> patch.
>
> Example usage:
>
> Output will contain raw PTT data and its textual representation, such
> as:
>
> 0 0 0x5810 [0x30]: PERF_RECORD_AUXTRACE size: 0x400000 offset: 0
> ref: 0xa5d50c725 idx: 0 tid: -1 cpu: 0
> .
> . ... HISI PTT data: size 4194304 bytes
> . 00000000: 00 00 00 00 Prefix
> . 00000004: 08 20 00 60 Header DW0
> . 00000008: ff 02 00 01 Header DW1
> . 0000000c: 20 08 00 00 Header DW2
> . 00000010: 10 e7 44 ab Header DW3
> . 00000014: 2a a8 1e 01 Time
> . 00000020: 00 00 00 00 Prefix
> . 00000024: 01 00 00 60 Header DW0
> . 00000028: 0f 1e 00 01 Header DW1
> . 0000002c: 04 00 00 00 Header DW2
> . 00000030: 40 00 81 02 Header DW3
> . 00000034: ee 02 00 00 Time
> ....
>
> Signed-off-by: Qi Liu <liuqi115@...wei.com>
> Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
> ---
> tools/perf/arch/arm/util/auxtrace.c | 76 +++++-
> tools/perf/arch/arm/util/pmu.c | 3 +
> tools/perf/arch/arm64/util/Build | 2 +-
> tools/perf/arch/arm64/util/hisi_ptt.c | 195 ++++++++++++++++
> tools/perf/util/Build | 2 +
> tools/perf/util/auxtrace.c | 4 +
> tools/perf/util/auxtrace.h | 1 +
> tools/perf/util/hisi-ptt-decoder/Build | 1 +
> .../hisi-ptt-decoder/hisi-ptt-pkt-decoder.c | 170 ++++++++++++++
> .../hisi-ptt-decoder/hisi-ptt-pkt-decoder.h | 28 +++
> tools/perf/util/hisi_ptt.c | 218 ++++++++++++++++++
> tools/perf/util/hisi_ptt.h | 28 +++
> 12 files changed, 724 insertions(+), 4 deletions(-)
> create mode 100644 tools/perf/arch/arm64/util/hisi_ptt.c
> create mode 100644 tools/perf/util/hisi-ptt-decoder/Build
> create mode 100644 tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.c
> create mode 100644 tools/perf/util/hisi-ptt-decoder/hisi-ptt-pkt-decoder.h
> create mode 100644 tools/perf/util/hisi_ptt.c
> create mode 100644 tools/perf/util/hisi_ptt.h
>
> diff --git a/tools/perf/arch/arm/util/auxtrace.c b/tools/perf/arch/arm/util/auxtrace.c
> index 5fc6a2a3dbc5..393f5757c039 100644
> --- a/tools/perf/arch/arm/util/auxtrace.c
> +++ b/tools/perf/arch/arm/util/auxtrace.c
> @@ -4,9 +4,11 @@
> * Author: Mathieu Poirier <mathieu.poirier@...aro.org>
> */
>
> +#include <dirent.h>
> #include <stdbool.h>
> #include <linux/coresight-pmu.h>
> #include <linux/zalloc.h>
> +#include <api/fs/fs.h>
>
> #include "../../../util/auxtrace.h"
> #include "../../../util/debug.h"
> @@ -14,6 +16,7 @@
> #include "../../../util/pmu.h"
> #include "cs-etm.h"
> #include "arm-spe.h"
> +#include "hisi_ptt.h"
>
> static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err)
> {
> @@ -50,6 +53,58 @@ static struct perf_pmu **find_all_arm_spe_pmus(int *nr_spes, int *err)
> return arm_spe_pmus;
> }
>
> +static struct perf_pmu **find_all_hisi_ptt_pmus(int *nr_ptts, int *err)
> +{
> + const char *sysfs = sysfs__mountpoint();
> + struct perf_pmu **hisi_ptt_pmus = NULL;
> + struct dirent *dent;
> + char path[PATH_MAX];
> + DIR *dir = NULL;
> + int idx = 0;
> +
> + snprintf(path, PATH_MAX, "%s" EVENT_SOURCE_DEVICE_PATH, sysfs);
> + dir = opendir(path);
> + if (!dir) {
> + pr_err("can't read directory '%s'\n", EVENT_SOURCE_DEVICE_PATH);
> + *err = -EINVAL;
> + goto out;
> + }
> +
> + while ((dent = readdir(dir))) {
> + if (strstr(dent->d_name, HISI_PTT_PMU_NAME))
> + (*nr_ptts)++;
> + }
> +
> + if (!(*nr_ptts))
> + goto out;
> +
> + hisi_ptt_pmus = zalloc(sizeof(struct perf_pmu *) * (*nr_ptts));
> + if (!hisi_ptt_pmus) {
> + pr_err("hisi_ptt alloc failed\n");
> + *err = -ENOMEM;
using PTR_ERR seems better, if possible
> + goto out;
> + }
> +
> + rewinddir(dir);
> + while ((dent = readdir(dir))) {
> + if (strstr(dent->d_name, HISI_PTT_PMU_NAME) && idx < (*nr_ptts)) {
> + hisi_ptt_pmus[idx] = perf_pmu__find(dent->d_name);
> + if (hisi_ptt_pmus[idx]) {
> + pr_debug2("%s %d: hisi_ptt_pmu %d type %d name %s\n",
do you really need this?
> + __func__, __LINE__, idx,
> + hisi_ptt_pmus[idx]->type,
> + hisi_ptt_pmus[idx]->name);
> + idx++;
> + }
> +
> + }
> + }
> +
> +out:
> + closedir(dir);
> + return hisi_ptt_pmus;
> +}
> +
> struct auxtrace_record
> *auxtrace_record__init(struct evlist *evlist, int *err)
> {
> @@ -57,8 +112,12 @@ struct auxtrace_record
> struct evsel *evsel;
> bool found_etm = false;
> struct perf_pmu *found_spe = NULL;
> + struct perf_pmu *found_ptt = NULL;
> struct perf_pmu **arm_spe_pmus = NULL;
> + struct perf_pmu **hisi_ptt_pmus = NULL;
> +
> int nr_spes = 0;
> + int nr_ptts = 0;
> int i = 0;
>
> if (!evlist)
> @@ -66,13 +125,14 @@ struct auxtrace_record
>
> cs_etm_pmu = perf_pmu__find(CORESIGHT_ETM_PMU_NAME);
> arm_spe_pmus = find_all_arm_spe_pmus(&nr_spes, err);
> + hisi_ptt_pmus = find_all_hisi_ptt_pmus(&nr_ptts, err);
>
> evlist__for_each_entry(evlist, evsel) {
> if (cs_etm_pmu &&
> evsel->core.attr.type == cs_etm_pmu->type)
> found_etm = true;
>
> - if (!nr_spes || found_spe)
> + if ((!nr_spes || found_spe) && (!nr_ptts || found_ptt))
> continue;
>
> for (i = 0; i < nr_spes; i++) {
> @@ -81,11 +141,18 @@ struct auxtrace_record
> break;
> }
> }
> +
> + for (i = 0; i < nr_ptts; i++) {
> + if (evsel->core.attr.type == hisi_ptt_pmus[i]->type) {
> + found_ptt = hisi_ptt_pmus[i];
> + break;
> + }
> + }
> }
> free(arm_spe_pmus);
do you need to do something similar for hisi ptt?
>
> - if (found_etm && found_spe) {
> - pr_err("Concurrent ARM Coresight ETM and SPE operation not currently supported\n");
> + if (found_etm && found_spe && found_ptt) {
> + pr_err("Concurrent ARM Coresight ETM ,SPE and HiSilicon PCIe Trace operation not currently supported\n");
> *err = -EOPNOTSUPP;
> return NULL;
> }
> @@ -96,6 +163,9 @@ struct auxtrace_record
> #if defined(__aarch64__)
> if (found_spe)
> return arm_spe_recording_init(err, found_spe);
> +
> + if (found_ptt)
> + return hisi_ptt_recording_init(err, found_ptt);
> #endif
>
> /*
> diff --git a/tools/perf/arch/arm/util/pmu.c b/tools/perf/arch/arm/util/pmu.c
> index b8b23b9dc598..89a3cedb4557 100644
> --- a/tools/perf/arch/arm/util/pmu.c
> +++ b/tools/perf/arch/arm/util/pmu.c
> @@ -10,6 +10,7 @@
> #include <linux/string.h>
>
> #include "arm-spe.h"
> +#include "hisi_ptt.h"
> #include "../../../util/pmu.h"
>
> struct perf_event_attr
> @@ -22,6 +23,8 @@ struct perf_event_attr
> #if defined(__aarch64__)
> } else if (strstarts(pmu->name, ARM_SPE_PMU_NAME)) {
> return arm_spe_pmu_default_config(pmu);
> + } else if (strstarts(pmu->name, HISI_PTT_PMU_NAME)) {
> + pmu->selectable = true;
> #endif
> }
>
> diff --git a/tools/perf/arch/arm64/util/Build b/tools/perf/arch/arm64/util/Build
> index 9fcb4e68add9..8b7fd1dc9f37 100644
> --- a/tools/perf/arch/arm64/util/Build
> +++ b/tools/perf/arch/arm64/util/Build
> @@ -11,4 +11,4 @@ perf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
> perf-$(CONFIG_AUXTRACE) += ../../arm/util/pmu.o \
> ../../arm/util/auxtrace.o \
> ../../arm/util/cs-etm.o \
> - arm-spe.o mem-events.o
> + arm-spe.o mem-events.o hisi_ptt.o
nit: others use '-' in the name
I'll check the rest tomorrow.
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