Accessing guest memory from the host

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I would like,
with security in mind (see lkcd.sourceforge.net),
to be able to access guest -kernel- memory content from the host
(x86_64 Intel VT).

As far as I know on x86 you can only r/w access memory if you can map
it with the pagetables
(i.e. no direct physical addressing is possible).

If I am correct, I need some "sort" of pagetable mapping/translation
and I hope to be able to find some (even just partially)
useful function inside kvm/qemu.

Thanks in advance,

GM
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