[PATCH v2 0/2] KVM: x86/mmu: Fix a TDP MMU leak and optimize zap all

From: Sean Christopherson
Date: Thu Aug 12 2021 - 14:14:27 EST

Patch 1 fixes a leak of root-1 shadow pages, patch 2 is a minor
optimization to the zap all flow that avoids re-reading and re-checking
the root-1 SPTEs after they've been zapped by "zap all" flows.

I'm still somewhat on the fence for patch 2, feel free to drop it.

- Replaced magic number silliness with Paolo's much more clever suggestion.
- Elaborated on the benefits of the optimization.
- Add Ben's somewhat reluctant review for the optimization.

v1: https://lkml.kernel.org/r/20210812050717.3176478-1-seanjc@xxxxxxxxxx

Sean Christopherson (2):
KVM: x86/mmu: Don't leak non-leaf SPTEs when zapping all SPTEs
KVM: x86/mmu: Don't step down in the TDP iterator when zapping all

arch/x86/kvm/mmu/tdp_mmu.c | 35 ++++++++++++++++++++++++-----------
1 file changed, 24 insertions(+), 11 deletions(-)