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* [PATCH v2 0/2] KVM: x86/mmu: Fix a TDP MMU leak and optimize zap all
@ 2021-08-12 18:14 Sean Christopherson
  2021-08-12 18:14 ` [PATCH v2 1/2] KVM: x86/mmu: Don't leak non-leaf SPTEs when zapping all SPTEs Sean Christopherson
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Sean Christopherson @ 2021-08-12 18:14 UTC (permalink / raw)
  To: Paolo Bonzini
  Cc: Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
	Joerg Roedel, kvm, linux-kernel, Ben Gardon

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.

v2:
 - 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@google.com

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
    SPTEs

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

-- 
2.33.0.rc1.237.g0d66db33f3-goog


^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2021-08-13  7:36 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-12 18:14 [PATCH v2 0/2] KVM: x86/mmu: Fix a TDP MMU leak and optimize zap all Sean Christopherson
2021-08-12 18:14 ` [PATCH v2 1/2] KVM: x86/mmu: Don't leak non-leaf SPTEs when zapping all SPTEs Sean Christopherson
2021-08-12 18:14 ` [PATCH v2 2/2] KVM: x86/mmu: Don't step down in the TDP iterator " Sean Christopherson
2021-08-13  7:36 ` [PATCH v2 0/2] KVM: x86/mmu: Fix a TDP MMU leak and optimize zap all Paolo Bonzini

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