Re: [RFC PATCH v5 04/45] KVM: x86: Make "external SPTE" ops that can fail RET0 static calls

[Edgecombe, Rick P]

On Wed, 2026-01-28 at 17:14 -0800, Sean Christopherson wrote:
> Define kvm_x86_ops .link_external_spt(), .set_external_spte(), and
> .free_external_spt() as RET0 static calls so that an unexpected call to a
> a default operation doesn't consume garbage.
> 
> Fixes: 77ac7079e66d ("KVM: x86/tdp_mmu: Propagate building mirror page tables")
> Fixes: 94faba8999b9 ("KVM: x86/tdp_mmu: Propagate tearing down mirror page tables")
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>

We don't want to crash unnecessarily, but do we want to get some sort of notice?