linux-kernel - Re: [PATCH v2] perf/arm-cmn: Fix port detection for CMN-700

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Message-Id: <168147630105.2392292.8274353847304643416.b4-ty@kernel.org>
Date:   Fri, 14 Apr 2023 15:38:38 +0100
From:   Will Deacon <will@...nel.org>
To:     Robin Murphy <robin.murphy@....com>
Cc:     catalin.marinas@....com, kernel-team@...roid.com,
        Will Deacon <will@...nel.org>, linux-kernel@...r.kernel.org,
        Jing Zhang <renyu.zj@...ux.alibaba.com>,
        linux-arm-kernel@...ts.infradead.org, mark.rutland@....com,
        ilkka@...amperecomputing.com
Subject: Re: [PATCH v2] perf/arm-cmn: Fix port detection for CMN-700

On Wed, 12 Apr 2023 11:29:40 +0100, Robin Murphy wrote:
> When the "extra device ports" configuration was first added, the
> additional mxp_device_port_connect_info registers were added around the
> existing mxp_mesh_port_connect_info registers. What I missed about
> CMN-700 is that it shuffled them around to remove this discontinuity.
> As such, tweak the definitions and factor out a helper for reading these
> registers so we can deal with this discrepancy easily, which does at
> least allow nicely tidying up the callsites. With this we can then also
> do the nice thing and skip accesses completely rather than relying on
> RES0 behaviour where we know the extra registers aren't defined.
> 
> [...]

Applied to will (for-next/perf), thanks!

[1/1] perf/arm-cmn: Fix port detection for CMN-700
      https://git.kernel.org/will/c/2ad91e44e6b0

Cheers,
-- 
Will

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