question about nested ntp

[Gleb Natapov <gleb@redhat.com>]

Hi Joerg,

I have a question about nested ntp code. Comment in init_kvm_nested_mmu()
function says "arch.mmu.gva_to_gpa translates l2_gva to l1_gpa". If
I read the code correctly at the time of nested guest execution
arch.mmu.gva_to_gpa() points to one of paging*_gva_to_gpa() variants. The
function calls walk_addr() with provided address which should be
l2_gva according to the comment.  Now when NPF happens while nested
guest runs arch.mmu.page_fault() is called which translates to call
to one of paging*_page_fault() variants.  paging*_page_fault() calls
walk_addr() too, but now it gets l2_gpa as a parameter since during
NPF svm->vmcb->control.exit_info_2 will not point to l2_gva, but l2_gpa
instead. Do I miss something here?

--
			Gleb.