On Thu, Dec 23, 2021 at 06:06:19PM +0000, Sean Christopherson wrote: > 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. Right, thanks.
