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Re: [PATCH] libx86: Introduce x86_cpu_policy_calculate_compatible() with MSR_ARCH_CAPS handling

On 05.05.2021 16:29, Andrew Cooper wrote:
> Technically, MCXSR_MASK is also a hard blocker to migration, but we
> don't even have that data in a consumable form, and we just might be
> extremely lucky and discover that it is restricted to non-64-bit CPUs.

"it" being what here? The value's presence / absence in an {F,}XSAVE
image? Or the precise value of it?




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