Re: [PATCH 0/4] KVM: x86/mmu: Bug fixes and cleanups in get_mmio_spte()

[Paolo Bonzini]

On 18/12/20 01:31, Sean Christopherson wrote:
> Two fixes for bugs that were introduced along with the TDP MMU (though I
> strongly suspect only the one reported by Richard, fixed in patch 2/4, is
> hittable in practice).  Two additional cleanup on top to try and make the
> code a bit more readable and shave a few cycles.
>
> Sean Christopherson (4):
>    KVM: x86/mmu: Use -1 to flag an undefined spte in get_mmio_spte()
>    KVM: x86/mmu: Get root level from walkers when retrieving MMIO SPTE
>    KVM: x86/mmu: Use raw level to index into MMIO walks' sptes array
>    KVM: x86/mmu: Optimize not-present/MMIO SPTE check in get_mmio_spte()
>
>   arch/x86/kvm/mmu/mmu.c     | 53 +++++++++++++++++++++-----------------
>   arch/x86/kvm/mmu/tdp_mmu.c |  9 ++++---
>   arch/x86/kvm/mmu/tdp_mmu.h |  4 ++-
>   3 files changed, 39 insertions(+), 27 deletions(-)

Queued, thanks (and thanks for Ccing stable on the first two already :)).

Paolo