[coreboot] Re: [RFT] Linux fails to detect devices on AGESA board with `nosmp`

[Kyösti Mälkki]

On Thu, Jan 16, 2020 at 5:21 PM awokd via coreboot
 wrote:
> Sergej Ivanov:
> > I can reproduce this bug on Biostar AM1ML. I think this bug is ACPI
> > related, if i add 'nosmp acpi=off' Ubuntu boots fine.

Hi

Parameter 'nosmp' disables I/O APIC and enforces PIC IRQ routing. How
about 'nosmp pci=noacpi', it's less intrusive than using 'acpi=off'.

It is somewhat well-known that AGESA boards' IRQ routing is a one sick
puppy [1] [2]. Or perhaps the entire litter, pun intended.

[1] https://review.coreboot.org/c/coreboot/+/38262
[2] https://review.coreboot.org/c/coreboot/+/38313

Kyösti