Re: [Qemu-ppc] [PATCH] spapr/vio: deprecate the "irq" property

[Greg Kurz]

On Wed, 6 Jun 2018 10:18:52 +1000
David Gibson <address@hidden> wrote:

> On Tue, Jun 05, 2018 at 08:56:26AM +0200, Cédric Le Goater wrote:
> > VIO devices have an "irq" property that can be used by the sPAPR IRQ
> > allocator as an IRQ number hint. But it is not set in QEMU nor in
> > libvirt. It brings unnecessary complexity to the underlying layers
> > managing the IRQ number space and it is in full opposition with the
> > new static IRQ allocator we want to introduce in sPAPR.
> > 
> > Let's deprecate it to simplify the spapr_irq_alloc routine in the
> > future.
> > 
> > Signed-off-by: Cédric Le Goater <address@hidden>  
> 
> Applied to ppc-for-3.0.
> 
> Should we also add a section for deprecated properties to
> https://wiki.qemu.org/Features/LegacyRemoval ?
> 

It isn't formally required but it wouldn't hurt.

"Note: This page is used to gather ideas about deprecated features and 
interfaces,
 the lists here are by no means mandatory!"

> > ---
> >  qemu-doc.texi      | 12 ++++++++++--
> >  hw/ppc/spapr_vio.c | 19 ++++++++++++++++++-
> >  2 files changed, 28 insertions(+), 3 deletions(-)
> > 
> > diff --git a/qemu-doc.texi b/qemu-doc.texi
> > index f00706b9996c..fd25ddf7a06a 100644
> > --- a/qemu-doc.texi
> > +++ b/qemu-doc.texi
> > @@ -2970,13 +2970,21 @@ support page sizes < 4096 any longer.
> >  The ``xlnx-ep108'' machine has been replaced by the ``xlnx-zcu102'' 
> > machine.
> >  The ``xlnx-zcu102'' machine has the same features and capabilites in QEMU.
> >  
> > address@hidden Block device options
> > address@hidden Device options
> >  
> > address@hidden "backing": "" (since 2.12.0)
> > address@hidden Block device options
> > +
> > address@hidden "backing": "" (since 2.12.0)
> >  
> >  In order to prevent QEMU from automatically opening an image's backing
> >  chain, use ``"backing": null'' instead.
> >  
> > address@hidden vio-spapr-device device options
> > +
> > address@hidden "irq": "" (since 3.0.0)
> > +
> > +The ``irq'' property is obsoleted.
> > +
> >  @node Supported build platforms
> >  @appendix Supported build platforms
> >  
> > diff --git a/hw/ppc/spapr_vio.c b/hw/ppc/spapr_vio.c
> > index 472dd6f33a96..28bb3b849b9b 100644
> > --- a/hw/ppc/spapr_vio.c
> > +++ b/hw/ppc/spapr_vio.c
> > @@ -22,6 +22,7 @@
> >  #include "qemu/osdep.h"
> >  #include "qemu/error-report.h"
> >  #include "qapi/error.h"
> > +#include "qapi/visitor.h"
> >  #include "hw/hw.h"
> >  #include "qemu/log.h"
> >  #include "sysemu/sysemu.h"
> > @@ -41,8 +42,24 @@
> >  
> >  #include <libfdt.h>
> >  
> > +static void spapr_vio_getset_irq(Object *obj, Visitor *v, const char *name,
> > +                              void *opaque, Error **errp)
> > +{
> > +    Property *prop = opaque;
> > +    uint32_t *ptr = qdev_get_prop_ptr(DEVICE(obj), prop);
> > +
> > +    warn_report(TYPE_VIO_SPAPR_DEVICE " '%s' property is deprecated", 
> > name);
> > +    visit_type_uint32(v, name, ptr, errp);
> > +}
> > +
> > +static const PropertyInfo spapr_vio_irq_propinfo = {
> > +    .name = "irq",
> > +    .get = spapr_vio_getset_irq,
> > +    .set = spapr_vio_getset_irq,
> > +};
> > +
> >  static Property spapr_vio_props[] = {
> > -    DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \
> > +    DEFINE_PROP("irq", VIOsPAPRDevice, irq, spapr_vio_irq_propinfo, 
> > uint32_t),
> >      DEFINE_PROP_END_OF_LIST(),
> >  };
> >    
>

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