Hello, everyone:
I know that x86_emulate_memop() is used to emulate writing to page
table pages as Xen intentionally write protect page table pages.
Also, the hypercall Hypervisor_update_va_mapping() ->
mod_l2/l1_entry() is also used to modify page table pages.
So I get confused about their difference. My questions are:
(1) When are the above two routines of modifying page table pages
invoked respectively?
(2) What's the difference in functionality among the two?
Best Wishes
Tom
I know that x86_emulate_memop() is used to emulate writing to page
table pages as Xen intentionally write protect page table pages.
Also, the hypercall Hypervisor_update_va_mapping() ->
mod_l2/l1_entry() is also used to modify page table pages.
So I get confused about their difference. My questions are:
(1) When are the above two routines of modifying page table pages
invoked respectively?
(2) What's the difference in functionality among the two?
Best Wishes
Tom