Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <22d07c42-b2e3-06ae-6366-7f7a69edcedc@linux.alibaba.com>
Date:   Thu, 4 May 2023 15:21:56 +0800
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0)
 Gecko/20100101 Thunderbird/102.10.1
Subject: Re: [PATCH v2 3/5] driver/perf: Add identifier sysfs file for Yitian
 710 DDR
Content-Language: en-US
To:     Jing Zhang <renyu.zj@linux.alibaba.com>,
        John Garry <john.g.garry@oracle.com>,
        Ian Rogers <irogers@google.com>, Will Deacon <will@kernel.org>
Cc:     James Clark <james.clark@arm.com>,
        Mike Leach <mike.leach@linaro.org>,
        Leo Yan <leo.yan@linaro.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Ilkka Koskinen <ilkka@os.amperecomputing.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@kernel.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Adrian Hunter <adrian.hunter@intel.com>,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-perf-users@vger.kernel.org,
        Zhuo Song <zhuo.song@linux.alibaba.com>
References: <1682329456-19418-1-git-send-email-renyu.zj@linux.alibaba.com>
 <1682329456-19418-4-git-send-email-renyu.zj@linux.alibaba.com>
From:   Shuai Xue <xueshuai@linux.alibaba.com>
In-Reply-To: <1682329456-19418-4-git-send-email-renyu.zj@linux.alibaba.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 7bit
Precedence: bulk


On 2023/4/24 17:44, Jing Zhang wrote:
> To allow userspace to identify the specific implementation of the device,
> add an "identifier" sysfs file.
> 
> The perf tool can match the Yitian 710 DDR metric through the identifier.
> 
> Signed-off-by: Jing Zhang <renyu.zj@linux.alibaba.com>

LGTM, thanks.

Reviewed-by: Shuai Xue <xueshuai@linux.alibaba.com>

Best Regards,
Shuai

> ---
>  drivers/perf/alibaba_uncore_drw_pmu.c | 27 +++++++++++++++++++++++++++
>  1 file changed, 27 insertions(+)
> 
> diff --git a/drivers/perf/alibaba_uncore_drw_pmu.c b/drivers/perf/alibaba_uncore_drw_pmu.c
> index a7689fe..fe075fd 100644
> --- a/drivers/perf/alibaba_uncore_drw_pmu.c
> +++ b/drivers/perf/alibaba_uncore_drw_pmu.c
> @@ -236,10 +236,37 @@ static ssize_t ali_drw_pmu_cpumask_show(struct device *dev,
>  	.attrs = ali_drw_pmu_cpumask_attrs,
>  };
>  
> +static ssize_t ali_drw_pmu_identifier_show(struct device *dev,
> +					struct device_attribute *attr,
> +					char *page)
> +{
> +	return sysfs_emit(page, "%s\n", "ali_drw_pmu");
> +}
> +
> +static umode_t ali_drw_pmu_identifier_attr_visible(struct kobject *kobj,
> +						struct attribute *attr, int n)
> +{
> +	return attr->mode;
> +}
> +
> +static struct device_attribute ali_drw_pmu_identifier_attr =
> +	__ATTR(identifier, 0444, ali_drw_pmu_identifier_show, NULL);
> +
> +static struct attribute *ali_drw_pmu_identifier_attrs[] = {
> +	&ali_drw_pmu_identifier_attr.attr,
> +	NULL
> +};
> +
> +static const struct attribute_group ali_drw_pmu_identifier_attr_group = {
> +	.attrs = ali_drw_pmu_identifier_attrs,
> +	.is_visible = ali_drw_pmu_identifier_attr_visible
> +};
> +
>  static const struct attribute_group *ali_drw_pmu_attr_groups[] = {
>  	&ali_drw_pmu_events_attr_group,
>  	&ali_drw_pmu_cpumask_attr_group,
>  	&ali_drw_pmu_format_group,
> +	&ali_drw_pmu_identifier_attr_group,
>  	NULL,
>  };
>