Re: [BUG] x2apic broken with current AMD hardware

[Neowutran <me@xxxxxxxxxxxxx>]

> > >>>>>> I was taking a look at the BIOS manual for this motherboard and 
> > >>>>>> noticed
> > >>>>>> a mention of a "Local APIC Mode" setting.  Four values are listed
> > >>>>>> "Compatibility", "xAPIC", "x2APIC", and "Auto".
> 
> This does appear to be an improvement.  With this the system boots if
> the "Local APIC Mode" setting is "auto".  As you may have guessed,
> "(XEN) Switched to APIC driver x2apic_phys".
> 
> 
> 
> When I tried setting "Local APIC Mode" to "x2APIC" though things didn't
> go so well.  

I confirm what Elliott said, just tested the patch on my computer (ryzen 7000 
series). 

Before, I was using the workaround "x2apic=false" in the xen boot
option. 

After applying the patch, when "Local APIC Mode" is set to "auto" ( or
at least not "x2APIC"), then it work without needing the "x2apic=false"
workaround. 
If "Local APIC Mode" is set to "X2APIC", then it is stuck waiting for
nvme 
information, like without the patch and without the "x2apic=false"
workaround.

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