Re: [Qemu-devel] [PATCH v1 3/8] spapr: move all DIMM checks into spapr_memory_plug

[Igor Mammedov <imammedo@redhat.com>]

On Fri, 8 Jun 2018 10:07:59 +0200
David Hildenbrand <david@redhat.com> wrote:

> On 08.06.2018 10:05, Greg Kurz wrote:
> > On Thu,  7 Jun 2018 18:52:13 +0200
> > David Hildenbrand <david@redhat.com> wrote:
> >   
> >> Let's clean the hotplug handler up by moving everything into
> >> spapr_memory_plug().
> >>
> >> Signed-off-by: David Hildenbrand <david@redhat.com>
> >> ---
> >>  hw/ppc/spapr.c | 23 ++++++++++-------------
> >>  1 file changed, 10 insertions(+), 13 deletions(-)
> >>
> >> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> >> index d038f3243e..a12be24ca9 100644
> >> --- a/hw/ppc/spapr.c
> >> +++ b/hw/ppc/spapr.c
> >> @@ -3136,14 +3136,22 @@ static void spapr_add_lmbs(DeviceState *dev, uint64_t addr_start, uint64_t size,
> >>  }
> >>  
> >>  static void spapr_memory_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
> >> -                              uint32_t node, Error **errp)
> >> +                              Error **errp)
> >>  {
> >>      Error *local_err = NULL;
> >>      sPAPRMachineState *ms = SPAPR_MACHINE(hotplug_dev);
> >> +    sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(ms);
> >>      PCDIMMDevice *dimm = PC_DIMM(dev);
> >>      PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
> >>      MemoryRegion *mr;
> >>      uint64_t align, size, addr;
> >> +    uint32_t node;
> >> +
> >> +    if (!smc->dr_lmb_enabled) {
> >> +        error_setg(&local_err, "Memory hotplug not supported for this machine");
> >> +        goto out;
> >> +    }  
> > 
> > Wouldn't it be more appropriate to move this check to spapr_memory_pre_plug() ?  
> 
> Think you're right (and as spapr_memory_pre_plug() already exists, it's
> easy), other opinions? Thanks.
I also think that it should go to preplug

> 
> >   
> >> +    node = object_property_get_uint(OBJECT(dev), PC_DIMM_NODE_PROP, NULL);
> >>  
> >>      mr = ddc->get_memory_region(dimm, &local_err);
> >>      if (local_err) {
> >> @@ -3568,19 +3576,8 @@ out:
> >>  static void spapr_machine_device_plug(HotplugHandler *hotplug_dev,
> >>                                        DeviceState *dev, Error **errp)
> >>  {
> >> -    MachineState *ms = MACHINE(hotplug_dev);
> >> -    sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(ms);
> >> -
> >>      if (object_dynamic_cast(OBJECT(dev), TYPE_PC_DIMM)) {
> >> -        int node;
> >> -
> >> -        if (!smc->dr_lmb_enabled) {
> >> -            error_setg(errp, "Memory hotplug not supported for this machine");
> >> -            return;
> >> -        }
> >> -        node = object_property_get_uint(OBJECT(dev), PC_DIMM_NODE_PROP, NULL);
> >> -
> >> -        spapr_memory_plug(hotplug_dev, dev, node, errp);
> >> +        spapr_memory_plug(hotplug_dev, dev, errp);
> >>      } else if (object_dynamic_cast(OBJECT(dev), TYPE_SPAPR_CPU_CORE)) {
> >>          spapr_core_plug(hotplug_dev, dev, errp);
> >>      }  
> >   
> 
>