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Re: rump pci drivers backend

From: Luca dariz
Subject: Re: rump pci drivers backend
Date: Tue, 9 Aug 2016 00:21:18 +0200
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Il 30/07/2016 03:47, Olaf Buddenhagen ha scritto:
> On Fri, Jul 29, 2016 at 06:30:09PM +0000, Luca wrote:
>> I need a way to translate logical addresses to physical,
> Is this for DMA or something along these lines? If so, the interface for
> allocating "contiguous memory" that was added for the purpose of DDE
> should work here as well I'd presume.
> (I didn't like how the original interface was designed specifically, and
> I don't know whether in has been improved since -- but regardless, it
> should get the job done...)
> If it doesn't cut it, or this is about something else entirely, could
> you elaborate please?

The contiguous memory allocation interface is not enough. I mean, at
least in the virtio ld driver, there are some addresses that must be
translated which are not allocated with vm_allocate_contiguous. However
I did not investigate in detail why this is needed.


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