I got it , thank you for your help.
2013/6/13 Paolo Bonzini <pbonzini@xxxxxxxxxx>
Il 12/06/2013 23:28, yongcheng.wu@xxxxxxxxxxxxx ha scritto:
> I have a problem for shadow page table. why is write-protect for the
> pages containing PML4/PDPT/PDT (page directory) of the guest? In
> other words, need to synchronize the change of the page directory of
> the guest?
Shadow page tables are the combination of both the host and guest page
tables into a single translation. So they need to be updated every time
the host or the guest change the page tables. Updates for the host page
tables are tracked with MMU notifiers; updates for the guest page tables
are tracked with write protection.
Paolo
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