linux-kernel - Re: [PATCH v2 1/5] perf/arm_cspmu: Add arm_cspmu_acpi_dev

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Message-ID: <f8ce489b-e4dc-47d5-b66b-b0dbc8bc92b3@arm.com>
Date: Fri, 26 Sep 2025 11:01:22 +0100
From: Suzuki K Poulose <suzuki.poulose@....com>
To: Besar Wicaksono <bwicaksono@...dia.com>, "will@...nel.org"
 <will@...nel.org>, "robin.murphy@....com" <robin.murphy@....com>,
 "ilkka@...amperecomputing.com" <ilkka@...amperecomputing.com>
Cc: "linux-arm-kernel@...ts.infradead.org"
 <linux-arm-kernel@...ts.infradead.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
 "mark.rutland@....com" <mark.rutland@....com>,
 Thierry Reding <treding@...dia.com>, Jon Hunter <jonathanh@...dia.com>,
 Vikram Sethi <vsethi@...dia.com>, Rich Wiley <rwiley@...dia.com>,
 Shanker Donthineni <sdonthineni@...dia.com>
Subject: Re: [PATCH v2 1/5] perf/arm_cspmu: Add arm_cspmu_acpi_dev_get

On 25/09/2025 18:13, Besar Wicaksono wrote:
> 
> 
>> -----Original Message-----
>> From: Suzuki K Poulose <suzuki.poulose@....com>
>> Sent: Thursday, September 25, 2025 3:31 AM
>> To: Besar Wicaksono <bwicaksono@...dia.com>; will@...nel.org;
>> robin.murphy@....com; ilkka@...amperecomputing.com
>> Cc: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org; linux-
>> tegra@...r.kernel.org; mark.rutland@....com; Thierry Reding
>> <treding@...dia.com>; Jon Hunter <jonathanh@...dia.com>; Vikram Sethi
>> <vsethi@...dia.com>; Rich Wiley <rwiley@...dia.com>; Shanker Donthineni
>> <sdonthineni@...dia.com>
>> Subject: Re: [PATCH v2 1/5] perf/arm_cspmu: Add arm_cspmu_acpi_dev_get
>>
>> External email: Use caution opening links or attachments
>>
>>
>> On 23/09/2025 01:18, Besar Wicaksono wrote:
>>> Add interface to get ACPI device associated with the
>>> PMU. This ACPI device may contain additional properties
>>> not covered by the standard properties.
>>>
>>
>> Ok, but who needs this ? I couldn't see any users in the series.
>> Did I miss something ?
> 
> NVIDIA will need it to support upcoming PMU devices.
> I am still preparing the follow up patch series containing the use case
> on these new devices.

Thanks for the explanation. It would be good to post something with a 
user. You could post this patch, with the future series then.

Suzuki