Re: [PATCH v3 04/18] x86/intel_rdt: Feature discovery

From: Borislav Petkov
Date: Tue Oct 11 2016 - 13:08:52 EST

On Tue, Oct 11, 2016 at 11:57:52AM -0500, Nilay Vaish wrote:
> I think we should go with Fenghua' suggestion on this. Reading the
> code around the edits from this patch, it seems word 7 is not owned by
> anyone. Both AMD and Intel seem to be using it.

No, this is wrong. The 0x0 CPUID leaf is owned by Intel. Let me quote my
reply to Dave from yesterday:

There's no reason to do anything really: the 0x0... CPUID leaf is owned
by Intel and 0x8... by AMD. So far, if AMD implements a feature in the
Intel leaf, it sets the respective CPUID bit. So a feature can be
present in multiple vendors. Thus you don't need the vendor name in the


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