Re: [PATCH] i386/cpu: ARCH_CAPABILITIES should not be advertised on AMD

[Zhao Liu <zhao1.liu@intel.com>]

> I think we need firstly aligned on what the behavior of the Windows that hit
> "unsupported processor" is.
> 
> My understanding is, the Windows is doing something like
> 
> 	if (is_AMD && CPUID(arch_capabilities))
> 		error(unsupported processor)

This is just a guess; it's also possible that Windows checked this MSR
and found the necessary feature missing. Windows 11 has very strict
hardware support requirements.

> And I think this behavior is not correct.
> 
> However, it seems not the behavior of the Windows from your understanding.
> So what's the behavior in you mind?

Guessing and discussing what Windows' code actually does is unlikely to
yield results. It's closed-source, and even if someone knows the answer,
he probably won't disclose it due to contractual restrictions.

Thanks,
Zhao