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From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] MMIO address changes
Date: Wed, 3 Dec 2008 14:03:53 +0000
References: <200812011859.35859.paul@codesourcery.com>
	<20081203121745.GI31803@edgar.se.axis.com>
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To: qemu-devel@nongnu.org
Cc: "Edgar E. Iglesias" <edgar.iglesias@axis.com>

> > I've tried to be fairly thorough with the changes, and tested what I can.
> > However it's possible I missed or broke something, so please test your
> > favourite targets.
>
> FWIW the etrax-fs machine works OK although I am seeing a noticeable
> slow-down after the patch.

Strange. I wouldn't expect significant slowdown.
AFAIK the hot-path code should be pretty much unchanged (if anything faster 
because the IO handlers don't need to adjust the address). Even the TLB fill 
handler overhead (tlb_set_page_exec) should be negligible.

Paul