Re: [Qemu-devel] Re: [PATCH v6 07/12] pcie/hotplug: introduce pushing attention button command

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Oct 22, 2010 at 09:52:19AM -0500, Anthony Liguori wrote:
> On 10/22/2010 09:38 AM, Michael S. Tsirkin wrote:
> >On Fri, Oct 22, 2010 at 01:35:47PM +0200, Markus Armbruster wrote:
> >>"Michael S. Tsirkin"<mst@redhat.com>  writes:
> >>
> >>>On Wed, Oct 20, 2010 at 05:18:56PM +0900, Isaku Yamahata wrote:
> >>>>glue pcie_push_attention_button command.
> >>>>
> >>>>Signed-off-by: Isaku Yamahata<yamahata@valinux.co.jp>
> >>>So as a high level command, I think we need to
> >>>think about how to tie this into pci_add/pci_del.
> >>>Right?
> >>[...]
> >>
> >>Do we have consensus how our set of commands for hot plug should look
> >>like?  We talked about it, but did we reach consensus?  If yes, did we
> >>write it down somewhere?
> >I think for simple things yes:
> >- command to send hotplug notification to the guest
> >- command to immediately add/remove the device
> >- event to notify about guest ack
> 
> Is it a guest ack?  I thought it was actually an eject that can be
> initiated without the notification being sent to the guest.

Yes.

> If so, polling doesn't really make much sense.

Who said something about polling?

> Regards,
> 
> Anthony Liguori
> 
> >- way to poll status: did guest ack last command?
> >
> >Existing ones will keep function:
> >- send notification and when acked remove device
> >- add device and send notification
> >These are useful for human monitor but maybe not
> >for management.
> >
> >