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Re: [Xen-devel] About ISA DMA

from [Keir Fraser] [Permanent Link][Original]
To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Subject: Re: [Xen-devel] About ISA DMA
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Wed, 21 Mar 2007 10:07:32 +0000
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> Just curious whether Xen supports legacy ISA DMA for now which 
> has requirement on lower 16M memory. If can, how is it supported 
> since 1M-16M are occupied by Xen? Dom0 seems only setup 
> fixmap for 0-1M physical memory...

Xen doesn't support ISA DMA. This hasn't turned out to be a
significant problem as hardware with the ISA limitation has been
obsolete for a very long time.

 -- Keir


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