linux-kernel - Re: [PATCH v1 0/3] arm64: Support Cortex-X4 CPU for Perf Arm SPE

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Message-ID: <20230724113013.GB76473@leoy-huanghe.lan>
Date:   Mon, 24 Jul 2023 19:30:13 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Ali Saidi <alisaidi@...zon.com>
Cc:     acme@...nel.org, catalin.marinas@....com, will@...nel.org,
        john.g.garry@...cle.com, james.clark@....com,
        mike.leach@...aro.org, peterz@...radead.org, mingo@...hat.com,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...nel.org, namhyung@...nel.org, irogers@...gle.com,
        adrian.hunter@...el.com, scott@...amperecomputing.com,
        maz@...nel.org, anshuman.khandual@....com, german.gomez@....com,
        renyu.zj@...ux.alibaba.com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        fissure2010@...il.com
Subject: Re: [PATCH v1 0/3] arm64: Support Cortex-X4 CPU for Perf Arm SPE

Hi Ali,

On Fri, Jul 21, 2023 at 06:16:53PM +0000, Ali Saidi wrote:

> > This series support Cortex-X4 CPU in Perf Arm SPE.

[...]

> This looks good to me, but can we add the other cores that operate the
> same way now too? Flipping through the TRMs A78, X3, V2, X1, A715,
> A720, and A78C all have the same encodings. 

Thanks a lot for exploring more CPU variants which share the same data
source packet format.

The latest Linux kernel have defined the CPU part number and MIDR for
below CPU variants:

- A78
- X1
- A715
- A78C

I would like to use a patch to support these CPUs in perf tool.  Given
other CPU variants (X3/V2/A720) have not been supported in the kernel,
and so far no one requests them, I would like leave them out.

Please let me know if this okay for you or not.


> Reviewed-by: Ali Saidi <alisaidi@...zon.com>

Thanks for review, I will add your review tags in the new patch set.

Leo