[coreboot] Re: Booting Linux kernel with nosmp required on Lenovo T60 (ATI/AMD)

[Kyösti Mälkki]

> System *boots* with one of:
> maxcpus=0 (equivalent nosmp)
> maxcpus=1
> nolapic (with e1000 warning about missing MSI-X
>
> System does *not* boot with one of:
> maxcpus=2
> noapic

I thought SMP was generally not compatible with PIC IRQ routing (which
noapic enforces?) and this would explain case 2.

As for case 1, maybe I missed some detail with my commit [1] when
switching from LAPIC to TSC timers. Like leaving LAPIC timers running
at different rate or generally having the timer counters too much
out-of-sync across CPU #0 and #1. You coud try if that one is the
commit with regression.

[1] https://review.coreboot.org/c/coreboot/+/34200

Kyösti