Re: [Xen-devel] [PATCH RFC] x86: Add hack to disable "Fake HT" mode

[Andreas Kinzler <hfp@xxxxxxxxx>]

On 15.11.2019 12:29, George Dunlap wrote:
> On 11/15/19 11:17 AM, Andreas Kinzler wrote:
> > I do not understand a central point: No matter why and/or how a fake
> > topology is presented by Xen, why did the older generation Ryzen 2xxx
> > work and Ryzen 3xxx doesn't? What is the change in AMD(!) not Xen that
> > causes the one to work and the other to fail?
> The CPU features that the guest sees are a mix of the real underlying
> features and changes made by Xen.  Xen and/or the hardware will behave
Why not analyze the bits in detail? I already posted the complete CPUID 
for 3700X 
(https://lists.xenproject.org/archives/html/xen-devel/2019-09/msg02189.html).
@Steven:
> If this is helpful, I can probably provide the same from:
>    * Ryzen 2700x
>    * Ryzen 3900x
Can you post for 2700X?

Then someone with detailed knowledge could compare the two?

Regards Andreas

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