On Thu, Dec 23, 2021, Chao Peng wrote: > This new function establishes the mapping in KVM page tables for a > given gfn range. It can be used in the memory fallocate callback for > memfd based memory to establish the mapping for KVM secondary MMU when > the pages are allocated in the memory backend.
NAK, under no circumstance should KVM install SPTEs in response to allocating memory in a file. The correct thing to do is to invalidate the gfn range associated with the newly mapped range, i.e. wipe out any shared SPTEs associated with the memslot.
