linux-kernel - Re: [RFC PATCH v2 12/34] x86/msr: Remove pmu_msr

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Message-ID: <018705C7-35CF-406A-85DA-360FF7BCB072@zytor.com>
Date: Thu, 24 Apr 2025 14:14:12 -0700
From: "H. Peter Anvin" <hpa@...or.com>
To: Xin Li <xin@...or.com>, Jürgen Groß <jgross@...e.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
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        netdev@...r.kernel.org, platform-driver-x86@...r.kernel.org
CC: tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, acme@...nel.org,
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Subject: Re: [RFC PATCH v2 12/34] x86/msr: Remove pmu_msr_{read,write}()

On April 24, 2025 10:49:59 AM PDT, Xin Li <xin@...or.com> wrote:
>On 4/24/2025 3:05 AM, Jürgen Groß wrote:
>> 
>> May I suggest to get rid of the "emul" parameter of pmu_msr_chk_emulated()?
>> It has no real value, as pmu_msr_chk_emulated() could easily return false in
>> the cases where it would set *emul to false.
>
>Good idea!
>
>The function type is a bit of weird but I didn't think of change it.

It is weird in the extreme. 

By the way, this patch should have "xen" in its subject tag.