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From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] qemu vl.c hw/omap.c
Date: Tue, 4 Dec 2007 01:20:25 +0000
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To: qemu-devel@nongnu.org

On Tuesday 04 December 2007, andrzej zaborowski wrote:
> On 04/12/2007, Paul Brook <paul@codesourcery.com> wrote:
> > > Log message:
> > >       Always create an SD bdrv, so that PXA and OMAP boards can boot
> > > with no card inserted again.  Eventually SD, CDROM and floppy should
> > > all be registered conditionally depending on machine.
> >
> > This seems the wrong way to solve this problem. The SD emulation should
> > be able to cope with no device being present.
>
> The bdrv's represent the concept of "drive" rather than "media", and
> also in the case the bdrv must be present whenever there is a SD slot,
> not an SD card (so that monitor command change and eject can be used).
> I agree that not all machines have an SD slot, as not all machines
> have a cd-rom drive or floppy drive.

Right, but I think you're going in the wrong direction. Most scsi interfaces 
do support hotplug of devices. For USB mass storage the whole controller is 
hotplug. Pre-allocating all possible devices simply doesn't scale.

Paul