Re: [Qemu-devel] [PATCH] Fix non-ACPI Timer Interrupt Routing

[Sebastian Herbszt]

Beth Kon wrote:
> This is part of a bigger change for QEMU, incorporating irq0->inti2 
> override for ACPI, and non-ACPI, driven by addition of the HPET. It 
> required BIOS changes as well as QEMU changes to route irq0 to inti2 of 
> the IOAPIC. This patch alone is not complete. I have tested the complete 
> solution in QEMU, thus the guards.

I just tested qemu r7185 with bochs bios (without your patch) and used a Linux
2.6.27.7 guest (openSUSE-11.1-NET-i586.iso). If i don't misunderstand you
this change is only needed with HPET. I have tested the following configurations
which all fail:

hpet enabled, no guest kernel parameters
hpet enabled, guest kernel with acpi=off
hpet disabled, no guest kernel parameters
hpet disabled, guest kernel with acpi=off

Since it even fails with HPET disabled, this change can't only be needed for 
HPET, can it?

Ed: Have you tried your Linux guest with HPET enabled or disabled in your 
original report / patch?

- Sebastian