Hi, Paolo, I'm working on migration support for SPP(Sub-Page Protection) feature, the previous patch set is here: https://lkml.org/lkml/2018/11/30/574, basically it's used to protect 128-byte subpages within a normal 4KB page. but I'm not sure whether we need to add migration support for such kind of feature. Currently, my solution is to store the SPP bitmaps to destination KVM, when there's EPT violation, search the bitmap mapping table to check if the guest page needs to be protected. Another solution is to setup EPT table directly at the end of migration. Do you have perferred approach? Thanks for your comments!
