[Xen-devel] remove entry in shadow table

[HANNAS YAYA Issa <issa.hannasyaya@xxxxxxxxxxx>]

Hi
I want to remove entry of a given page in the shadow page table so that 
when the next time the guest access to the page there is page fault.
Here is what I try to do:

1. I have a timer which wake up every 30 seconds and remove entry in 
the shadow by calling
sh_remove_all_mappings(d->vcpu[0], _mfn(page_to_mfn(page)))
here "d" is the domain and "page" is the page that I want to remove 
from the shadow page table.
2. In the function "sh_page_fault()" I get the gmfn and compare it with 
the mfn of the page that I removed earlier from the shadow page table.
Is this method correct?

I also get this error: "sh error: sh_remove_all_mappings(): can't find 
all mappings of mfn"
Thank you

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