linux-kernel - Re: [PATCH v2 0/4] perf drivers: Add sysfs identifier file

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Date:   Wed, 25 Nov 2020 15:44:06 +0000
From:   Will Deacon <will@...nel.org>
To:     qiangqing.zhang@....com, zhangshaokun@...ilicon.com,
        mark.rutland@....com, Frank.li@....com,
        John Garry <john.garry@...wei.com>, robh+dt@...nel.org
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>, acme@...nel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        irogers@...gle.com, jolsa@...hat.com, devicetree@...r.kernel.org,
        linuxarm@...wei.com
Subject: Re: [PATCH v2 0/4] perf drivers: Add sysfs identifier file

On Thu, 8 Oct 2020 17:26:17 +0800, John Garry wrote:
> To allow perf tool to identify a specific implementation of a PMU for
> event alias matching and metric support, expose a per-PMU identifier file.
> 
> There is no standard format for the identifier string. It just should be
> unique per HW implementation.
> 
> Typical methods to retrieve the information for the identifier string
> can include:
> - Hardcoding in the driver, matched via DT bindings compat string,
>   ACPI HID, or similar
> - Directly from DT bindings property
> - Read from some HW identification register
> 
> [...]

Applied the hisi and smmu parts to will (for-next/perf), thanks!

[1/4] drivers/perf: hisi: Add identifier sysfs file
      https://git.kernel.org/will/c/ac4511c9364c
[...]
[4/4] perf/smmuv3: Support sysfs identifier file
      https://git.kernel.org/will/c/2c255223362e

I've completely lost track of the imx ddr PMU, so I dropped those parts
(patch 3/4 seemed to remove a compatible string from the driver?).

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev