On 5/14/21 10:32 AM, Thomas Gleixner wrote:
That's a valid assumption. As I said, we can make IOAPIC work even w/o PIC. I'll have a look how much PIC assumptions are still around.
As far as I read, the problem isn't actually the absence of a PIC (we definitely boot systems without PICs all the time now), but rather that the PIC is advertised in ACPI but is buggy or absent; a similar platform with different firmware doesn't have problem.
If my understanding of the thread is correct, it's quirk fodder. -hpa
