Re: [Qemu-devel] [PATCH 0/3] add hotplug opt-out option for devices.

[Gerd Hoffmann]

On 11/18/10 12:20, Gleb Natapov wrote:
> On Thu, Nov 18, 2010 at 12:13:21PM +0100, Gerd Hoffmann wrote:
> > On 11/18/10 12:01, Gleb Natapov wrote:
> > > On Thu, Nov 18, 2010 at 11:45:15AM +0100, Gerd Hoffmann wrote:
> > > >    Hi,
> > > >
> > > > This patch series adds a qdev flag which allows devices being tagged as
> > > > not hotpluggable.  It also sets this flag for a number of devices.
> > > Do we want to be able to mark device as not hot-unpluggable from command
> > > like too? Something like this -device blabla,notunplug=no.
> >
> > Hmm, dunno.  Do you have a example where this would be needed or useful?
> Dunno me too. Windows allows to eject any hot-unpluggable device to any
> user and in the past we got requirement to disable this and had to build
> two BIOSes one with cpu hot-plug support another without. So
> hot-pluggability of device looks like management decision (along with
> technical one if device can't be actually unplugged).

For *that* use case well have to do a bit more like dynamically building 
the acpi table which indicates which slots are hot-pluggable and which 
are not.  Which indeed would be useful and would fix the windows xp 
offering me to unplug the piix chipset in the "savely remove hardware" 
menu ;)

But I suspect it also isn't exactly trivial and way behind the scope of 
this little patch set ...

cheers,
  Gerd