linux-kernel - Re: [PATCH] x86/hyperv: Trace hv_set

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Message-ID: <aa9cd68b-645b-d997-e327-dc8335de913e@intel.com>
Date:   Wed, 7 Jun 2023 04:27:55 -0700
From:   Dave Hansen <dave.hansen@...el.com>
To:     Nischala Yelchuri <niyelchu@...ux.microsoft.com>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Tyler Hicks <code@...icks.com>, boqun.feng@...il.com,
        "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Nischala Yelchuri <niyelchu@...rosoft.com>
Subject: Re: [PATCH] x86/hyperv: Trace hv_set_register()

On 6/6/23 18:35, Nischala Yelchuri wrote:
>  void hv_set_register(unsigned int reg, u64 value)
>  {
> +	trace_hyperv_set_register(reg, value);
> +
>  	if (hv_nested)
>  		reg = hv_get_nested_reg(reg);

I can't help but wonder if this is just a patch for people that don't
know how to set kprobes.