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[Xen-devel] Mapping foreign frames from dom0


I am hacking on a Mini-OS that is able to run as domain 0 and is able to start a guest (another Mini-OS for now). I was able to get a memory allocated to the guest and am now trying to build its pagetable and after that copy the kernel to the right places. The problem is:

Given a machine frame number from a memory frame of the guest, how do I conceptionally map this into dom0's address space? I followed the code path from xc_map_foreign_range to some obscure pagetable updates in the Linux kernel, but am still unable to make heads or tails of it.

Any help is appreciated.


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