Re: [Xen-ia64-devel] [Patch] Follow new interrupt deliver mechanism for PV-on-HVM/IPF

[Alex Williamson <alex.williamson@xxxxxx>]

On Tue, 2006-12-19 at 20:01 +0900, DOI Tsunehisa wrote:
> --- a/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c        Mon Dec 
> 18 10:56:34 2006 -0700
> +++ b/unmodified_drivers/linux-2.6/platform-pci/platform-pci.c        Tue Dec 
> 19 18:22:05 2006 +0900
> @@ -182,12 +182,16 @@ static int get_callback_irq(struct pci_d
>  static int get_callback_irq(struct pci_dev *pdev)
>  {
>  #ifdef __ia64__
> -     int irq;
> +     int irq, rid;
>       for (irq = 0; irq < 16; irq++) {
>               if (isa_irq_to_vector(irq) == pdev->irq)
>                       return irq;
>       }
> -     return 0;
> +     /* use Requester-ID as callback_irq */
> +     /* RID: '<#bus(8)><#dev(5)><#func(3)>' (cf. PCI-Express spec) */
> +     rid = ((pdev->bus->number & 0xff) << 8) | pdev->devfn;
> +     printk(KERN_INFO DRV_NAME ":use Requester-ID(%04x) as callback irq\n", 
> rid);
> +     return rid | (1 << 31); /* with RID marker(MSB) */

   Ok, except (1 << 31) needs to be defined in a common header somewhere
so it's not just a random magic bit.  Thanks,

        Alex

-- 
Alex Williamson                             HP Open Source & Linux Org.


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