[Xen-devel] Re: X86_emulate to be moved into qemu...

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 17 May 2006, at 21:17, Petersson, Mats wrote:

> When using x86_emulate.c inside qemu, we'd need to feed in the virtual
> address, but we also need to translate to (guest-)physical address. Any
> hints or tricks for this, or do I need to read the page-table and get
> the info that way [and CAN I even do that]? [And I'm sorry if this 
> shows
> my complete and utter ignorance of how Xen and QEMU operates together,
> but I'm afraid that I'm still learning these things].
Yes, you could walk pagetables. But equally you can pass in your 
translated CR2 value --- i.e., pass in a pseudophysical address. That 
address will then be passed to the special read/write hook functions, 
so you avoid needing to do the translation inside those.
> Another interesting question is what we do with the dozen or so "new"
> include-files that are needed to make x86_emulate.c compile inside the
> tools/ioemu directory. At the moment, I've just created directories
> inside tools/libxc and linked the necessary header files into those
> directories... Is that the proper solution?
What header files are those? It builds in tools/test/ without so many 
header files.
 -- Keir


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