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Date: Mon, 16 Nov 2009 13:24:16 -0600
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: [Qemu-devel] [PATCH 0/2] extboot reloaded.
References: <1258394678-8634-1-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,
>
> How about this one?  extboot rom and interface are unmodified.
>
> The windup in qemu is very different though.  It is now implemented as
> isa bus device (which is what extboot actually is).  It is properly
> integrated into qdev.  It is much less invasive than the previous
> version.  The patch just drops a hw/extboot.c file into the tree and
> adds it to Makefile.target.  No code changes anywhere else in qemu.
>
> The magic words to activate extboot are '-device extboot,drive=<name>'.
>   

If we were going to introduce a light weight block protocol like this, 
I'd rather it be implemented in SeaBIOS as a block driver.  Then we 
reuse all of the int13 code, it gets registered as a BCV device allowing 
selection in the boot menu, and requires no special options on the 
command line.

It would require a mechanism to do enumeration and identification though.

Regards,

Anthony Liguori

> cheers,
>   Gerd
>
>
>
>