Re: [Qemu-ppc] [PATCH 2/2] hw/ppc/spapr Add qemu_register_boot_set for SPAPR

[Dinar Valeev]

On 01/24/2015 12:04 AM, Alexander Graf wrote:
> On 23.01.15 23:51, address@hidden wrote:
> > From: Dinar Valeev <address@hidden>
> >
> > In order to have -boot once=d functioning, it is required to have
> > qemu_register_boot_set
> >
> > qemu-system-ppc64 -enable-kvm -boot once=d
> >
> > Ready!
> > 0 > dev /chosen   ok
> > 0 > .properties
> > ...
> > qemu,boot-device                 d
> > ...
> > 0 > reset-all
> >
> > Ready!
> > 0 > dev /chosen   ok
> > 0 > .properties
> > ...
> > qemu,boot-device                 cdn
> > ...
> >
> > Signed-off-by: Dinar Valeev <address@hidden>
> > ---
> >   hw/ppc/spapr.c | 12 ++++++++++++
> >   1 file changed, 12 insertions(+)
> >
> > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> > index 3d2cfa3..38b03fc 100644
> > --- a/hw/ppc/spapr.c
> > +++ b/hw/ppc/spapr.c
> > @@ -314,6 +314,16 @@ static void add_str(GString *s, const gchar *s1)
> >       g_string_append_len(s, s1, strlen(s1) + 1);
> >   }
> >
> > +static void spapr_boot_set(void *opaque, const char *boot_device,
> > +                           Error **errp)
> > +{
> > +    int offset;
> > +    offset = fdt_path_offset(opaque, "/chosen");
> > +    fdt_setprop_string(opaque, offset, "qemu,boot-device", boot_device);
> > +
> > +}
> > +
> > +
> >   static void *spapr_create_fdt_skel(hwaddr initrd_base,
> >                                      hwaddr initrd_size,
> >                                      hwaddr kernel_size,
> > @@ -414,6 +424,8 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base,
> >       if (boot_device) {
> >           _FDT((fdt_property_string(fdt, "qemu,boot-device", boot_device)));
> >       }
> > +    qemu_register_boot_set(spapr_boot_set, fdt);
>
> If you simply move the code above (the _FDT() one) from create_fdt_skel
> to spapr_finalize_fdt() you should have the same net effect and much
> cleaner code :).
Haven't tried it, but I suspect -boot once=d on reset will be still 
equal to -boot d behaviour.

And does it make sense to split boot_device from the rest?
> Alex
>
> > +
> >       if (boot_menu) {
> >           _FDT((fdt_property_cell(fdt, "qemu,boot-menu", boot_menu)));
> >       }