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SubjectRe: [PATCH v9 12/26] x86/fpu/xstate: Use feature disable (XFD) to protect dynamic user state
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

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