linux-kernel - dma_mapping

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Message-ID: <46817016.7090400@goop.org>
Date:	Tue, 26 Jun 2007 15:59:18 -0400
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Andi Kleen <ak@...e.de>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: dma_mapping_ops for i386

I'm looking at adding dom0 support to the pv-ops kernel.  One of the 
obvious things we need is to support real device drivers, and the 
associated p->m translations for devices.

I'm thinking the cleanest thing to do is make x86-64's dma-mapping.h 
with its dma_mapping_ops common to i386 and x86-64, so we can hook the 
Xen translations in there.  Presumably we'll need to do this anyway to 
support VTd for 32-bit (but I don't know if that's a reasonable thing to 
do anyway).

What do you think?

    J
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