[RFC PATCH 00/17] KVM: arm64: Parallelize stage 2 fault handling

[Paolo Bonzini]

On 4/21/22 18:30, Ben Gardon wrote:
> Completely agree. I'm surprised that ARM doesn't have a need for a
> metadata structure associated with each page of the stage 2 paging
> structure, but if you don't need it, that definitely makes things
> simpler.

The uses of struct kvm_mmu_page in the TDP MMU are all relatively new, 
for the work_struct and the roots' reference count.  sp->ptep is only 
used to in a very specific path, kvm_recover_nx_lpages.

I wouldn't be surprised if ARM grows more metadata later, but in fact 
it's not _that_ surprising that it doesn't need it yet!

Paolo