Re: [RFCv2 09/16] KVM: mm: Introduce VM_KVM_PROTECTED

[Edgecombe, Rick P]

On Tue, 2020-10-20 at 09:18 +0300, Kirill A. Shutemov wrote:
>  include/linux/mm.h  |  8 ++++++++
>  mm/gup.c            | 20 ++++++++++++++++----
>  mm/huge_memory.c    | 20 ++++++++++++++++----
>  mm/memory.c         |  3 +++
>  mm/mmap.c           |  3 +++
>  virt/kvm/async_pf.c |  2 +-
>  virt/kvm/kvm_main.c |  9 +++++----
>  7 files changed, 52 insertions(+), 13 deletions(-)

There is another get_user_pages() in
paging_tmpl.h:FNAME(cmpxchg_gpte). 

Also, did you leave off FOLL_KVM in gfn_to_page_many_atomic() on
purpose? It looks like its only used for pte prefetch which I guess is
not required.