[Qemu-devel] Re: [PATCH v3 1/1] Shared memory uio_pci driver

[Avi Kivity]

On 03/28/2010 12:40 PM, Michael S. Tsirkin wrote:
> > > uio accepts 32 bit writes to the char device file. We can encode
> > > the fd number there, and use the high bit to signal assign/deassign.
> > >
> > >        
> > Ugh.  Very unexpandable.
> >      
> It currently fails on any non-4 byte write.
> So if we need more bits in the future we can always teach it
> about e.g. 8 byte writes.
>
> Do you think it's worth it doing it now already, and using
> 8 byte writes for msi mapping?
>    

Aren't ioctls a lot simpler?

Multiplexing multiple functions on write()s is just ioctls done uglier.

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