On Thu, 3 Jan 2019 13:00:58 +1100 David Gibson <da...@gibson.dropbear.id.au> wrote:
> On Fri, Dec 21, 2018 at 01:36:32AM +0100, Greg Kurz wrote:
> > From: Michael Roth <mdr...@linux.vnet.ibm.com>
> >
> > The 'dr_phb_enabled' field of that class can be set as part of
> > machine-specific init code. It will be used to conditionally
> > enable creation of DRC objects and device-tree description to
> > facilitate hotplug of PHBs.
> >
> > Since we can't migrate this state to older machine types,
> > default the option to true and disable it for older machine
> > types.
> >
> > Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
> > Signed-off-by: Greg Kurz <gr...@kaod.org>
>
> Although it makes sense to have this function first while
> developing, it's usually best to have it last when you push, so you
> don't have a potential bisection breakage where the support is
> advertised but not fully working.
>
Yes you're right. I've done so for v2.
> > ---
> > hw/ppc/spapr.c | 2 ++
> > include/hw/ppc/spapr.h | 1 +
> > 2 files changed, 3 insertions(+)
> >
> > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> > index 1f17b5d01f4f..621006eaa862 100644
> > --- a/hw/ppc/spapr.c
> > +++ b/hw/ppc/spapr.c
> > @@ -4011,6 +4011,7 @@ static void spapr_machine_class_init(ObjectClass *oc,
> > void *data)
> > smc->default_caps.caps[SPAPR_CAP_NESTED_KVM_HV] = SPAPR_CAP_OFF;
> > spapr_caps_add_properties(smc, &error_abort);
> > smc->irq = &spapr_irq_xics;
> > + smc->dr_phb_enabled = true;
> > }
> >
> > static const TypeInfo spapr_machine_info = {
> > @@ -4079,6 +4080,7 @@ static void
> > spapr_machine_3_1_class_options(MachineClass *mc)
> > SET_MACHINE_COMPAT(mc, SPAPR_COMPAT_3_1);
> > mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("power8_v2.0");
> > smc->update_dt_enabled = false;
> > + smc->dr_phb_enabled = false;
> > }
> >
> > DEFINE_SPAPR_MACHINE(3_1, "3.1", false);
> > diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
> > index 36033b89d31a..e96deefa30de 100644
> > --- a/include/hw/ppc/spapr.h
> > +++ b/include/hw/ppc/spapr.h
> > @@ -104,6 +104,7 @@ struct sPAPRMachineClass {
> > /*< public >*/
> > bool dr_lmb_enabled; /* enable dynamic-reconfig/hotplug of LMBs
> > */
> > bool update_dt_enabled; /* enable KVMPPC_H_UPDATE_DT */
> > + bool dr_phb_enabled; /* enable dynamic-reconfig/hotplug of PHBs
> > */
> > bool use_ohci_by_default; /* use USB-OHCI instead of XHCI */
> > bool pre_2_10_has_unused_icps;
> > bool legacy_irq_allocation;
> >
>
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