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: <e9eb280b-e744-e986-f4f1-fb510a8f3862@linux.alibaba.com>
Date:   Mon, 7 Aug 2023 19:52:42 +0800
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0)
 Gecko/20100101 Thunderbird/102.11.2
Subject: Re: [PATCH v6 3/7] perf jevents: Support more event fields
To:     John Garry <john.g.garry@oracle.com>,
        Ian Rogers <irogers@google.com>
Cc:     Will Deacon <will@kernel.org>, James Clark <james.clark@arm.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Mike Leach <mike.leach@linaro.org>,
        Leo Yan <leo.yan@linaro.org>,
        Namhyung Kim <namhyung@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Jiri Olsa <jolsa@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, linux-doc@vger.kernel.org,
        Zhuo Song <zhuo.song@linux.alibaba.com>,
        Shuai Xue <xueshuai@linux.alibaba.com>
References: <1691394685-61240-1-git-send-email-renyu.zj@linux.alibaba.com>
 <1691394685-61240-4-git-send-email-renyu.zj@linux.alibaba.com>
 <50a8778a-ebe4-5b3b-9367-c8547d6d991d@oracle.com>
From:   Jing Zhang <renyu.zj@linux.alibaba.com>
In-Reply-To: <50a8778a-ebe4-5b3b-9367-c8547d6d991d@oracle.com>
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Precedence: bulk


在 2023/8/7 下午5:24, John Garry 写道:
> On 07/08/2023 08:51, Jing Zhang wrote:
>> The usual event descriptions are "event=xxx" or "config=xxx", while the
>> event descriptions of CMN are "type=xxx, eventid=xxx" or more complex.
>>
>> $cat /sys/bus/event_source/devices/arm_cmn_0/events/hnf_cache_fill
>> type=0x5,eventid=0x3
>>
>> When adding aliases for events described as "event=xxx" or "config=xxx",
>> EventCode or ConfigCode can be used in the JSON files to describe the
>> events. But "eventid=xxx, type=xxx" cannot be supported at present.
>>
>> If EventCode and ConfigCode is not added in the alias JSON file, the
>> event description will add "event=0" by default. So, even if the event
>> field is added to supplement "eventid=xxx" and "type=xxx", the final
>> parsing result will be "event=0, eventid=xxx, type=xxx".
>>
>> Therefore, when EventCode and ConfigCode are missing in JSON, "event=0" is
>> no longer added by default. EventIdCode and Type are added to the event
>> field, and ConfigCode is moved into the event_field array which can also
>> guarantee its original function.
>>
>> Signed-off-by: Jing Zhang <renyu.zj@linux.alibaba.com>
> 
> I'll let Ian check this change as he is more familiar with this code.
> 

Ok, thanks!