linux-kernel - Re: [PATCH v2] dt-bingdings: perf: Support uncore ARM NI-700 PMU

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Message-ID: <873A6CC450C1D0E6+75a39d6c-4fbf-4e30-8630-3226bd725901@shingroup.cn>
Date: Wed, 31 Jan 2024 18:13:56 +0800
From: Yang Jialong 杨佳龙 <jialong.yang@...ngroup.cn>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 will <will@...nel.org>, "mark.rutland" <mark.rutland@....com>
Cc: shenghui.qu@...ngroup.cn, 赵可 <ke.zhao@...ngroup.cn>,
 zhijie.ren@...ngroup.cn, linux-kernel@...r.kernel.org,
 linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2] dt-bingdings: perf: Support uncore ARM NI-700 PMU



在 2024/1/31 17:30, Krzysztof Kozlowski 写道:
> On 31/01/2024 10:26, Yang Jialong 杨佳龙 wrote:
>>
>>
>> 在 2024/1/31 15:49, Krzysztof Kozlowski 写道:
>>> On 31/01/2024 07:59, JiaLong.Yang wrote:
>>>> Add file corresponding to hx_arm_ni.c introducing ARM NI-700 PMU driver
>>>> for HX.
>>>>
>>>> Signed-off-by: JiaLong.Yang <jialong.yang@...ngroup.cn>
>>>> ---
>>>> v1 --> v2:
>>>> 1. Submit dt-bindings file Seperately.
>>>
>>> Where is the driver?
>>>
>>> Please read:
>>> https://elixir.bootlin.com/linux/v6.8-rc2/source/Documentation/process/submitting-patches.rst
>>> before posting.
>>>
> 
> Keep all discussions public.

Get.

> 
> 
>>>> +  pccs-id:
>>>> +    $ref: /schemas/types.yaml#/definitions/uint32
>>>> +    description: Used to identify NIs in system which has more than
>>>> +      one NI.
>>>
>>> No, reg does it. Drop the property. Anyway you miss here vendor prefix
>>> and proper explanation.
>>>
>>
>> reg will tell phy address. Phy address is too long. I just want a id.
>> example: perf stat -a -e ni_pmu_${pccs-id}/cycles/
>> I will use it in user space. Not only in driver.
> 
> Custom vendor property is not for that purpose. Use for example IDR, DT
> aliases or something else.
> 
> 

I have considered TD aliases. It's not very easy. Two places...
IDR.. I have tested. But it chouldn't correspond to the HWs.
I need it to identify NIs.
DT aliases is reachable. But no very easy.

>>>
> 
> Best regards,
> Krzysztof
> 
>