Re: [PATCH 0/1] uio_pci_generic: extensions to allow access for non-privilegedprocesses

[Avi Kivity]

On 04/01/2010 07:06 PM, Tom Lyon wrote:
> On Thursday 01 April 2010 08:54:14 am Avi Kivity wrote:
>    
> > On 04/01/2010 06:39 PM, Tom Lyon wrote:
> >      
> > > > > - support for MSI and MSI-X interrupts (the intel 82599 VFs support
> > > > > only MSI-X)
> > > > >            
> > > > How does a userspace program receive those interrupts?
> > > >          
> > > Same as other UIO drivers - by read()ing an event counter.
> > >        
> > IIRC the usual event counter is /dev/uioX, what's your event counter now?
> >      
> Exact same mechanism.
>    

But there are multiple msi-x interrupts, how do you know which one 
triggered?

> > kvm really wants the event counter to be an eventfd, that allows hooking
> > it directly to kvm (which can inject an interrupt on an eventfd_signal),
> > can you adapt your patch to do this?
> >      
> My patch does not currently go anywhere near the read/fd logic of /dev/uioX.
> I think a separate patch would be appropriate.
>    

Sure.

--
error compiling committee.c: too many arguments to function

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