On Thu, 2025-10-16 at 17:32 -0700, Sean Christopherson wrote: > Add and use a new API for mapping a private pfn from guest_memfd into the > TDP MMU from TDX's post-populate hook instead of partially open-coding the > functionality into the TDX code. Sharing code with the pre-fault path > sounded good on paper, but it's fatally flawed as simulating a fault loses > the pfn, and calling back into gmem to re-retrieve the pfn creates locking > problems, e.g. kvm_gmem_populate() already holds the gmem invalidation > lock. > > Providing a dedicated API will also removing several MMU exports that > ideally would not be exposed outside of the MMU, let alone to vendor code. > On that topic, opportunistically drop the kvm_mmu_load() export. Leave > kvm_tdp_mmu_gpa_is_mapped() alone for now; the entire commit that added > kvm_tdp_mmu_gpa_is_mapped() will be removed in the near future. > > Cc: Michael Roth <[email protected]> > Cc: Yan Zhao <[email protected]> > Cc: Ira Weiny <[email protected]> > Cc: Vishal Annapurve <[email protected]> > Cc: Rick Edgecombe <[email protected]> > Link: https://lore.kernel.org/all/[email protected] > Signed-off-by: Sean Christopherson <[email protected]>
Reviewed-by: Rick Edgecombe <[email protected]>
