linux-kernel - [PATCH 0/6] KVM: x86: Apply NX mitigation more precisely

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Message-Id: <20220409003847.819686-1-seanjc@google.com>
Date:   Sat,  9 Apr 2022 00:38:41 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Mingwei Zhang <mizhang@...gle.com>
Subject: [PATCH 0/6] KVM: x86: Apply NX mitigation more precisely

This is just the kernel (NX) side of Mingwei's series "Verify dirty
logging works properly with page stats".  Relatively to v3 of Mingwei's
series[*], this fixes accounting (and tracking in the nonpaging case)
of disallowed NX huge pages.

I left off the selftests because I disagree with the "Dump stats" change,
and this has snowballed enough.

https://lore.kernel.org/all/20220401063636.2414200-1-mizhang@google.com

Mingwei Zhang (1):
  KVM: x86/mmu: explicitly check nx_hugepage in
    disallowed_hugepage_adjust()

Sean Christopherson (5):
  KVM: x86/mmu: Tag disallowed NX huge pages even if they're not tracked
  KVM: x86/mmu: Properly account NX huge page workaround for nonpaging
    MMUs
  KVM: x86/mmu: Set disallowed_nx_huge_page in TDP MMU before setting
    SPTE
  KVM: x86/mmu: Track the number of TDP MMU pages, but not the actual
    pages
  KVM: x86/mmu: Add helper to convert SPTE value to its shadow page

 arch/x86/include/asm/kvm_host.h |  17 ++----
 arch/x86/kvm/mmu.h              |   9 +++
 arch/x86/kvm/mmu/mmu.c          | 104 ++++++++++++++++++++++----------
 arch/x86/kvm/mmu/mmu_internal.h |  33 +++++-----
 arch/x86/kvm/mmu/paging_tmpl.h  |   6 +-
 arch/x86/kvm/mmu/spte.c         |  11 ++++
 arch/x86/kvm/mmu/spte.h         |  17 ++++++
 arch/x86/kvm/mmu/tdp_mmu.c      |  49 +++++++++------
 arch/x86/kvm/mmu/tdp_mmu.h      |   2 +
 9 files changed, 167 insertions(+), 81 deletions(-)


base-commit: 6521e072010d10380eca3d8a2203990e61e16ae0
-- 
2.35.1.1178.g4f1659d476-goog