Re: [PATCH] kvm-ia64 irq assignment 1/2 kernel

[Avi Kivity <avi@qumranet.com>]

Alexander Graf wrote:
>>
>> Apparently this is broken on x86 too. I was just trying this patch 
>> with Mac OS X as target and magically the in-kernel APIC starts 
>> working, so I guess something is going wrong already here.
>> Btw, according to the ACPI tables, all PCI interrupts are currently 
>> defined Active-Low.
>

So there's something else wrong.

> Sorry, ActiveHigh that is. Nevertheless I am having trouble with this 
> since the very first time I used osx inside KVM. Does PCI allow Active
>
> > Interrupt (, Level, ActiveHigh, Shared)
>
> According to the PCI 3.0 Spec, "Interrupts on PCI are optional and 
> defined as 'level sensitive,' asserted low (negative true)".

The pci interrupts are active low, but they are converted to active high 
by the chipset qemu emulates, so active high is correct.  Does OS X boot 
from the qemu bios or something else?  If the latter, it may need 
adjustment.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.