[Xen-devel] Re: [RFC] [PATCH] sysfs support for Xen attributes

["Mike D. Day" <ncmike@xxxxxxxxxx>]

Anthony Liguori wrote:
> Arjan van de Ven wrote:
>
> > On Thu, 2006-01-12 at 12:53 -0600, Anthony Liguori wrote:
> >  
> >
> > > We wish to make management hypercalls as the root user in userspace 
> > > which means we have to go through the kernel.  Currently, we do this
> > > by having /proc/xen/privcmd accept an ioctl() that takes a structure
> > > that describe the register arguments.  The kernel interface allows us 
> > > to control who in userspace can execute hypercalls.
> > >   
> > ioctls on proc is evil though (so is ioctl-on-sysfs). It's a device not
> > a proc file!
> >  
> I full heartedly agree with you :-)
What about making hypercalls via with a read/write interface into memory 
mapped by a char device? Any problems with that approach?
Mike



--

Mike D. Day
STSM and Architect, Open Virtualization
IBM Linux Technology Center
ncmike@xxxxxxxxxx

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