Hi,

As Kyösti pointed, MP tables and IRQ is broken on AGESA boards. Most of the mainboards have mindlessly copy-pasted code that generates MP tables and IRQ tables. Those often contain entries of non-existing devices as a result. Since the most preferred way of IRQ routing is ACPI and most systems use it, the "noacpi" path wasn't thoroughly validated.

I will start working on it soon (most likely together with Kyösti), so the situation should improve a little bit.

Regards,
Michał

On 28.01.2020 11:33, Sergej Ivanov wrote:
Hello,

adding nosmp pci=noacpi results in same behaviour - linux can't assign irq to usb&sata controllers(but I don't see IRQ >15 anymore). Adding nosmp pci=biosirq,noacpi allow system to boot.

сб, 25 янв. 2020 г. в 03:14, Kyösti Mälkki <kyosti.malkki@gmail.com>:
On Thu, Jan 16, 2020 at 5:21 PM awokd via coreboot
<coreboot@coreboot.org> 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
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-- 
Michał Żygowski
Firmware Engineer
http://3mdeb.com | @3mdeb_com