Xen devel - Mar 2008 - Is it possible to change a guest domain''s page table in Dom0''s user space?

Hi,

I''m doing some experiments under x86_64 PV domains.

I want to change a page table of some process in a guest domain.
And for easier programming, I want to do this in dom0 via libxc.

Now I can get the guest''s kernel structs (like init_task, init_mm) via
xc_map_foreign_range with R/W permissions. However, when I try to map the
page table directory, I can only use "PROT_READ", otherwise, it gives
a "Bad
address" error. Why?

any suggestions?

Thanks,
Weiming


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