On Tue, Oct 28, 2008 at 12:46:39PM +0200, Avi Kivity wrote:
> Muli Ben-Yehuda wrote:
>> On Sun, Oct 26, 2008 at 03:31:24PM +0200, Avi Kivity wrote:
>>
>>> Amit Shah wrote:
>>>
>>>> +int piix3_get_pin(int pic_irq)
>>>> +{
>>>> + int i;
>>>> + for (i = 0; i < 4; i++)
>>>> + if (piix3_dev->config[0x60+i] == pic_irq)
>>>> + return i;
>>>> + return -1;
>>>> +}
>>>>
>>> What happens if two pci interrupts are routed to one irq line?
>>>
>>
>> This one I'm still thinking about.
>>
>
> Well, what is this needed for in the first place?
This specific function is not used. I assume Amit added it for
completeness with piix_get_irq. piix_get_irq, as far as I can tell, is
used in only one place (when the guest updates a device's
configuration space interrupt register) to go from interrupt pin
(intx) to guest IRQ line.
Cheers,
Muli
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