[Qemu-devel] Re: [PATCH 1/7] Only call kvm_set_irqfd() if CONFIG_KVM is defined

["Michael S. Tsirkin" <mst@redhat.com>]

On Tue, Jun 15, 2010 at 03:48:50PM +0200, Paolo Bonzini wrote:
> On 06/15/2010 03:40 PM, Jes Sorensen wrote:
>> On 06/15/10 15:31, Paolo Bonzini wrote:
>>> On 06/15/2010 01:04 PM, Jes.Sorensen@redhat.com wrote:
>>>> From: Jes Sorensen<Jes.Sorensen@redhat.com>
>>>>
>>>> Only call kvm_set_irqfd() if CONFIG_KVM is defined to avoid breaking
>>>> the build for non x86.
>>>
>>> You can just add a stub to kvm-stub.c that returns -ENOSYS.
>>>
>>> Paolo
>>
>> It's more than that, the code also uses bits in the msix code that isn't
>> globally available.
>
> I see now.  BTW, my eventnotifier series conflicts with this part of  
> qemu-kvm, so it's probably better if I work that series out in qemu-kvm  
> first and then upstream.  As I would touch this code anyway, I think  
> your patch is fine even if it were be only a stopgap measure.
>
> Maybe the right fix, which I could include in my series, is to change  
> kvm_set_irqfd's calling convention to be like this:
>
>     int r = kvm_set_irqfd(&dev->msix_irq_entries[vector],
>                           event_notifier_get_fd(notifier),
>                           !masked);
>
> and extract the gsi in the function.  Michael, does this make any sense?
>
> Paolo

I'm fine with this change.