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Date: Mon, 23 Feb 2009 20:27:25 -0500
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Subject: Re: [Qemu-devel] [5849] Change MMIO callbacks to use offsets,  not
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To: Paul Brook <paul@codesourcery.com>
Cc: qemu-devel@nongnu.org

Paul Brook wrote:
>> How do you propose having the hardware drivers generate meaningful and
>> timely faults when an improper access is performed so it behaves like real
>> low level software expects the hardware to behave?
>>     
>
> If you're wanting to generate faults from IO devices then getting the right 
> physical address is the least of your concerns. First you need to figure out 
> how to avoid corrupting the rest of the CPU state.
>
> Paul
>
>   
The MMU does it so it must be possible.  Is it a design issue, performance
issue, just not worth the trouble or no one has really cared up until now?
Please enlighten me further.  Is it reasonable to expect it to work someday
or should I just accept that it won't?