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Date: Fri, 09 Sep 2011 13:53:30 +0200
From: Paolo Bonzini <pbonzini@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 2/5] dma-helpers: allow including from
 target-independent code
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To: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-devel@nongnu.org

On 09/09/2011 01:39 PM, Kevin Wolf wrote:
> Am 07.09.2011 17:20, schrieb Paolo Bonzini:
>> Target-independent code cannot construct sglists, but it can take
>> them from the outside as a black box.  Allow this.
>>
>> Signed-off-by: Paolo Bonzini<pbonzini@redhat.com>
>
> I was hoping to find the use case for this somewhere in the rest of the
> series, but there doesn't seem to be an example.

Indeed, unfortunately not yet.

> How can you make use of the dma.h functions when you can't build a
> QEMUSGList? Or would you have a target-dependent part that builds it and
> passes it to a target-independent part?

Exactly, scsi-disk/scsi-bus will pick the QEMUSGList from the HBA and 
treat it opaquely.

Paolo