[coreboot] Re: HPET MSI/FSB on AMD 16h

[awokd]

Michal Zygowski:
> On 01.07.2019 14:53, Andriy Gapon wrote:
> > It appears that HPET MSI support
> > is disabled on some platforms by default:
> >
> > src/vendorcode/amd/agesa/f15tn/Proc/Fch/Interface/Family/Hudson2/EnvDefHudson2.c:
> >    TRUE,                    // HpetMsiDis

FWIW, I hardcoded the above to FALSE, recompiled, and reflashed my 
f15tn. It caused Qubes to run about half as fast. I checked the logs and 
didn't see any errors to explain why. I then changed it back to TRUE and 
HPET itself to FALSE (and recompiled/reflashed). Normal speed came back, 
XEN Platform timer changed from HPET to ACPI, and MSI is still enabled 
for some of the PCI devices. For example, the video controller on 
00:01.0 is IRQ 57 and capability [a0] is MSI: Enable+.