Re: [Xen-devel] [PATCH v4 5/8] ioreq-server: add support for multiple servers

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

On 04/03/2014 04:39 PM, Paul Durrant wrote:
> > -----Original Message-----
> > From: dunlapg@xxxxxxxxx [mailto:dunlapg@xxxxxxxxx] On Behalf Of
> > George Dunlap
> > Sent: 03 April 2014 16:33
> > To: Paul Durrant
> > Cc: xen-devel@xxxxxxxxxxxxx; Ian Jackson; Ian Campbell; Jan Beulich; Stefano
> > Stabellini
> > Subject: Re: [Xen-devel] [PATCH v4 5/8] ioreq-server: add support for
> > multiple servers
> >
> > On Wed, Apr 2, 2014 at 4:11 PM, Paul Durrant <paul.durrant@xxxxxxxxxx>
> > wrote:
> > +++++++++++++++++++++++++++++++++++---
> > > diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
> > > index 369c3f3..8cec171 100644
> > > --- a/tools/libxc/xc_domain.c
> > > +++ b/tools/libxc/xc_domain.c
> > > @@ -1284,6 +1284,181 @@ int xc_get_hvm_param(xc_interface *handle,
> > domid_t dom, int param, unsigned long
> > >       return rc;
> > >   }
> > >
> > > +int xc_hvm_create_ioreq_server(xc_interface *xch,
> > > +                               domid_t domid,
> > > +                               ioservid_t *id)
> > > +{
> > > +    DECLARE_HYPERCALL;
> > > +    DECLARE_HYPERCALL_BUFFER(xen_hvm_create_ioreq_server_t, arg);
> > > +    int rc;
> > > +
> > > +    arg = xc_hypercall_buffer_alloc(xch, arg, sizeof(*arg));
> > > +    if ( arg == NULL )
> > > +        return -1;
> > > +
> > > +    hypercall.op     = __HYPERVISOR_hvm_op;
> > > +    hypercall.arg[0] = HVMOP_create_ioreq_server;
> > > +    hypercall.arg[1] = HYPERCALL_BUFFER_AS_ARG(arg);
> > > +    arg->domid = domid;
> > > +    rc = do_xen_hypercall(xch, &hypercall);
> > > +    *id = arg->id;
> > > +    xc_hypercall_buffer_free(xch, arg);
> > > +    return rc;
> > > +}
> > Sorry if I missed it, but was there anywhere the 8-server limit is
> > checked?  What happens if someone calls xc_hvm_create_ioreq_server() 9
> > times?
Just checking -- did you miss this question, or are you going to come 
back to it later? :-)
 -George

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