[PATCH v3 04/25] KVM: x86/mmu: Add dedicated API to map guest_memfd pfn into TDP MMU

[Yan Zhao]

On Thu, Oct 16, 2025 at 05:32:22PM -0700, Sean Christopherson wrote:
> Link: https://lore.kernel.org/all/20250709232103.zwmufocd3l7sqk7y@amd.com

Hi Sean,                                                                         

Will you post [1] to fix the AB-BA deadlock issue for huge page in-place
conversion as well?

Without it, the "WARNING: possible circular locking dependency detected" would
still appear due to

- lock(mapping.invalidate_lock#4) --> lock(&mm->mmap_lock)
  for init mem on non-in-place-conversion guest_memfd
- rlock(&mm->mmap_lock) --> rlock(mapping.invalidate_lock#4)
  for faulting shared pages on in-place-convertion guest_memfd

[1] https://lore.kernel.org/all/aHEwT4X0RcfZzHlt@google.com/                     
                                                                                 
Thanks                                                                           
Yan