Re: [Qemu-devel] [PATCH Part1 1/5] acpi, pc: Add hotunplug request cb for pc machine.

[Igor Mammedov <imammedo@redhat.com>]

On Wed, 10 Dec 2014 15:02:44 +0800
Tang Chen <tangchen@cn.fujitsu.com> wrote:

> Hi Igor,
> 
> On 11/18/2014 08:44 PM, Igor Mammedov wrote:
> > On Mon, 17 Nov 2014 13:03:13 +0800
> > Tang Chen <tangchen@cn.fujitsu.com> wrote:
> >
> > in subj s/cb/callback|handler/
> >
> >> Memory and CPU hot unplug are both asynchronize procedures.
> > s/asynchronize/asynchronous/
> >> They both need unplug request cb when the unplug operation happens.
> > s/cb when the unplug operation happens/callback to initiate unplug operation/
> >
> >> This patch adds hotunplug request cb for pc machine, and memory and CPU
> >> hot unplug will base on it.
> > Add unplug handler to pc machine that will be used by following
> > CPU and memory unplug patches.
> >
> >
> >> Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
> >> ---
> >>   hw/i386/pc.c | 8 ++++++++
> >>   1 file changed, 8 insertions(+)
> >>
> >> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> >> index 1205db8..5c48435 100644
> >> --- a/hw/i386/pc.c
> >> +++ b/hw/i386/pc.c
> >> @@ -1647,6 +1647,13 @@ static void pc_machine_device_plug_cb(HotplugHandler *hotplug_dev,
> >>       }
> >>   }
> >>   
> >> +static void pc_machine_device_unplug_request_cb(HotplugHandler *hotplug_dev,
> >> +                                                DeviceState *dev, Error **errp)
> >> +{
> >> +    error_setg(errp, "acpi: device unplug request for not supported device"
> >> +               " type: %s", object_get_typename(OBJECT(dev)));
> > it's not necessarily acpi related in general so maybe drop 'acpi:' prefix.
> > Also it would be nice to add device's ID or use it instead of type name.
> 
> Since QEmu 2.2 has been released, I'm now rebasing this patch-set.
> 
> Here, you suggested to use device id instead device type name.
> But all existing plug handles are using device type name.
> 
> Should I send patches to change them all ?
May be better would be to just leave it as is for now (i.e. out of this series).

> 
> Thanks.
> 
> >
> >> +}
> >> +
> >>   static HotplugHandler *pc_get_hotpug_handler(MachineState *machine,
> >>                                                DeviceState *dev)
> >>   {
> >> @@ -1753,6 +1760,7 @@ static void pc_machine_class_init(ObjectClass *oc, void *data)
> >>       pcmc->get_hotplug_handler = mc->get_hotplug_handler;
> >>       mc->get_hotplug_handler = pc_get_hotpug_handler;
> >>       hc->plug = pc_machine_device_plug_cb;
> >> +    hc->unplug_request = pc_machine_device_unplug_request_cb;
> >>   }
> >>   
> >>   static const TypeInfo pc_machine_info = {
> > .
> >
>