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Date: Fri, 25 Sep 2009 15:57:47 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] [PATCH 00/24] qdev: bus management updates.
References: <1253907769-1067-1-git-send-email-kraxel@redhat.com>
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To: Gerd Hoffmann <kraxel@redhat.com>
Cc: qemu-devel@nongnu.org

Gerd Hoffmann wrote:
>   Hi,
>
> One more respin, even more improvements.
>
>   hotplug, meet qdev.
>   qdev, meet hotplug.
>
> Changes summary:
>
>   * allow embedded bus structs.
>   * add bus release function.
>   * added device destruction callback to qdev devices.
>   * make qdev hotplug-aware (NEW!).
>   * make busses use the new features.
>
> End result is that you can use qdev_unplug() to unplug a device.
> Depending on the bus this will either not work at all (ISA), ask the
> guest OS to release the device (PCI+ACPI) or just zap it (USB).
>
> Using the destruction callback everything will be released properly when
> a device is zapped.  qdev will walk the child bus(es) if present and zap
> all connected devices too.
>
> You can pci_del the scsi adapter and all scsi disks will be deleted too.
> You can pci_del the usb controller and all usb devices connected will be
> deleted too.  You can unplug usb hubs, all connected devices will go away
> too.
>   

Very nice!

Regards,

Anthony Liguori