[Xen-devel] hvm_copy_from_guest_virt

Hi,

In Xen 3.3.0, hvm's shadow page fault handler: sh_page_fault():
I call 'hvm_copy_from_guest_virt' to read some guest's (Windows XP) memory.
If I read user space, it works fine.
If I read kernel space, like 0x8xxxxxxx or 0xFxxxxxxx, it retures HVMCOPY_bad_gva_to_gfn.
I am sure that the page I read is present in guest's page table.

Can I copy memory from kernel space?

Thanks,
Wu

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