Re: [PATCH v3 13/25] KVM: TDX: Fold tdx_mem_page_record_premap_cnt() into its sole caller

[Binbin Wu]

On 10/25/2025 12:33 AM, Sean Christopherson wrote:
> On Fri, Oct 24, 2025, Binbin Wu wrote:
> > On 10/17/2025 8:32 AM, Sean Christopherson wrote:
> > > Fold tdx_mem_page_record_premap_cnt() into tdx_sept_set_private_spte() as
> > > providing a one-off helper for effectively three lines of code is at best a
> > > wash, and splitting the code makes the comment for smp_rmb()  _extremely_
> > > confusing as the comment talks about reading kvm->arch.pre_fault_allowed
> > > before kvm_tdx->state, but the immediately visible code does the exact
> > > opposite.
> > >
> > > Opportunistically rewrite the comments to more explicitly explain who is
> > > checking what, as well as _why_ the ordering matters.
> > >
> > > No functional change intended.
> > >
> > > Reviewed-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
> > > Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
> > Reviewed-by: Binbin Wu <binbin.wu@xxxxxxxxxxxxxxx>
> >
> > One nit below.
> >
> > [...]
> > > +	/*
> > > +	 * If the TD isn't finalized/runnable, then userspace is initializing
> > > +	 * the VM image via KVM_TDX_INIT_MEM_REGION.  Increment the number of
> > > +	 * pages that need to be mapped and initialized via TDH.MEM.PAGE.ADD.
> > > +	 * KVM_TDX_FINALIZE_VM checks the counter to ensure all mapped pages
> >                                                                     ^
> >                                                  Nit: Is pre-mapped better?
> Yeah, updated (and then it gets deleted a few commits later :-) ).
Oh, right, nr_premapped will be dropped later.

Since the whole nr_premapped will be dropped, do we still need a cleanup patch
like patch 12 which will be dropped finally?