linux-kernel - Re: [PATCH] drivers/perf: hisi: Add tt_core

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Message-Id: <175880472273.3260342.8602469761490497790.b4-ty@kernel.org>
Date: Thu, 25 Sep 2025 16:32:03 +0100
From: Will Deacon <will@...nel.org>
To: mark.rutland@....com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Yicong Yang <yangyicong@...wei.com>
Cc: catalin.marinas@....com,
	kernel-team@...roid.com,
	Will Deacon <will@...nel.org>,
	jonathan.cameron@...wei.com,
	prime.zeng@...ilicon.com,
	linuxarm@...wei.com,
	yangyicong@...ilicon.com,
	wangyushan12@...wei.com,
	hejunhao3@...artners.com,
	yangyccccc@...il.com
Subject: Re: [PATCH] drivers/perf: hisi: Add tt_core_deprecated for compatibility

On Thu, 25 Sep 2025 11:31:23 +0800, Yicong Yang wrote:
> Previously tt_core is defined as config1:0-7 which may not cover all
> the CPUs sharing L3C on platforms with more than 8 CPUs in a L3C. In
> order to support such platforms extend tt_core to 16 bits, since no
> spare space in config1, tt_core was moved to config2:0-15.
> 
> Though linux expects the users to retrieve the control encoding from
> sysfs first for each option, it's possible if user doesn't follow
> this and hardcoded tt_core in config1. So add an option
> tt_core_deprecated for config1:0-7 for backward compatibility.
> 
> [...]

Applied to arm64 (for-next/core), thanks!

[1/1] drivers/perf: hisi: Add tt_core_deprecated for compatibility
      https://git.kernel.org/arm64/c/a084c3c4a267

Cheers,
-- 
Will

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