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

[Beth Kon]

Stanislav wrote:
> > The irq0->inti2 override is not absolutely required. Running Windows 
> > 2008 in QEMU with the emulated HPET does require it, so this is a 
> > QEMU-only change.
> >     
>
> Non-absolutely required is not good answer :)
> Is anything will be broken if the change is merged for Bochs as well ?
> I think it will not.
> And as bonus, Windows 7 32-bit is not booting under Bochs without this
> change.
>
>   
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.

The complete solution would require the madt_int_override portions of 
this patch:
http://lists.gnu.org/archive/html/qemu-devel/2008-11/txtSbJwxwQwiT.txt

and the Bochs equivalent of the QEMU irq0->inti2 routing (see changes to 
ioapic_set_irq) in this patch:
http://lists.gnu.org/archive/html/qemu-devel/2008-11/txtswJIdPnCbr.txt
> Stanislav
>
> -----Original Message-----
> From: address@hidden
> [mailto:address@hidden On Behalf Of Beth
> Kon
> Sent: Tuesday, April 14, 2009 5:20 PM
> To: address@hidden
> Cc: address@hidden; address@hidden;
> address@hidden
> Subject: Re: [Qemu-devel] [PATCH] Fix non-ACPI Timer Interrupt Routing
>
> Stanislav wrote:
>   
> > Hi,
> >
> > Could you explain why you doing these changes for QEMU only (with ifdef
> > QEMU) ?
> >
> >   
> >     
>
>
> The irq0->inti2 override is not absolutely required. Running Windows 
> 2008 in QEMU with the emulated HPET does require it, so this is a 
> QEMU-only change.
>
>
>
>
>
>