From mboxrd@z Thu Jan  1 00:00:00 1970
From: HANNAS YAYA Issa <issa.hannasyaya@enseeiht.fr>
Subject: about cr3 register
Date: Wed, 01 Apr 2015 16:37:04 +0200
Message-ID: <84e75c11446044541a3643b725743b26@inp-toulouse.fr>
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Hi
I am working on memory management in xen. I encounter a problem that I 
hope you can help me to solve it.
I modified the struct mmu_update in xen and linux source code. I add 
two fields cr3 and addr which respectively contains the current cr3 
value and the current address of the process associated with the pte to 
be updated. the struct mmu_update is sent to the hyervisor via hypercall 
HYPERVISOR_do_mmu_update.

In the handler of this hypercall (I mean do_mmu_update) when I read the 
value of cr3 via the method read_cr3 it is different from the value I 
stored before in the struct mmu_update. I wonder why?