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[Xen-devel] Is it possible to change a guest domain's page table in Dom0

from [weiming] [Permanent Link][Original]
To: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] Is it possible to change a guest domain's page table in Dom0's user space?
From: weiming <zephyr.zhao@xxxxxxxxx>
Date: 2008年3月20日 14:58:47 -0400
Delivery-date: 2008年3月20日 11:59:13 -0700
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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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