Re: [Xen-devel] [PATCH 3/4] libxl: only allow guests with a device model to use cd-{eject/insert}

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Fri, 8 Apr 2016, Wei Liu wrote:
> On Thu, Apr 07, 2016 at 07:45:28PM +0200, Roger Pau Monne wrote:
> > Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
> > Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> > Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> > ---
> >  tools/libxl/libxl.c | 6 ++++++
> >  1 file changed, 6 insertions(+)
> > 
> > diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
> > index 9d785a4..232e2c1 100644
> > --- a/tools/libxl/libxl.c
> > +++ b/tools/libxl/libxl.c
> > @@ -2909,6 +2909,12 @@ int libxl_cdrom_insert(libxl_ctx *ctx, uint32_t 
> > domid, libxl_device_disk *disk,
> >          goto out;
> >      }
> >  
> > +    if (dm_ver == LIBXL_DEVICE_MODEL_VERSION_NONE) {
> > +        LOG(ERROR, "HVM guests without a device model cannot use 
> > cd-insert");
> 
> It's not specific to HVM, right?

It's specific to guests with a device model (those are the only ones that 
can have an emulated CDROM device), and the only guests that can have a 
device model are HVM (although not all of them).

Roger.

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