Hi, I have one question related to nested EPT page fault. At the very start, L0 hypervisor launches L2 with an empty EPT0->2 table, building the table on-the-fly. when one L2 physical page is accessed, ept_page_fault(paging_tmpl.h) will be called to handle this fault in L0. which will first call ept_walk_addr to get guest ept entry from EPT1->2. If there is no such entry, a guest page fault will be injected into L1 to handle this fault. When the next time, the same L2 physical page is accessed, ept_page_fault will be triggered again in L0, which will also call ept_walk_addr and get the previously filled ept entry in EPT1->2, then try_async_pf will be called to translate the L1 physical page to L0 physical page. At the very last, an entry will be created in the EPT0->2 to solve the page fault. Please correct me if I am wrong. My question is when the EPT0->1 will be accessed during the EPT0->2 entry created, since according to the turtle's paper, both EPT0->1 and EPT->12 will be accessed to populate an entry in EPT0->2. Thanks for your time! Best Wishes, Yaohui -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
