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

[Beth Kon <eak@us.ibm.com>]

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: qemu-devel-bounces+stlintel=gmail.com@nongnu.org
> [mailto:qemu-devel-bounces+stlintel=gmail.com@nongnu.org] On Behalf Of Beth
> Kon
> Sent: Tuesday, April 14, 2009 5:20 PM
> To: qemu-devel@nongnu.org
> Cc: bochs-developers@lists.sourceforge.net; eswierk@aristanetworks.com;
> herbszt@gmx.de
> 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.
>
>
>
>
>
>