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Date:   Mon, 30 Aug 2021 19:41:57 +0200
From:   Borislav Petkov <bp@alien8.de>
To:     Len Brown <lenb@kernel.org>
Cc:     "Chang S. Bae" <chang.seok.bae@intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@kernel.org>, X86 ML <x86@kernel.org>,
        "Brown, Len" <len.brown@intel.com>,
        Dave Hansen <dave.hansen@intel.com>, thiago.macieira@intel.com,
        "Liu, Jing2" <jing2.liu@intel.com>,
        "Ravi V. Shankar" <ravi.v.shankar@intel.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v9 12/26] x86/fpu/xstate: Use feature disable (XFD) to
 protect dynamic user state
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On Tue, Aug 24, 2021 at 06:21:23PM -0400, Len Brown wrote:
> MSR_IA32_XFD and MSR_IA32_XFD_ERR are architectural.
> 
> (which is why they follow the convention of having an "IA32" in their name)

Where is that official statement I can refer to that says that MSRs with
"IA32" in the name are architectural?

Perhaps that section of the SDM:

"2.1 ARCHITECTURAL MSRS"

?

In any case, those MSRs are not there yet, maybe they need to trickle
from the ISA to the SDM docs at some point first.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette