[PATCH 0/2] KVM: x86/mmu: Fix unsync races within TDP MMU

[Sean Christopherson]

Patch 1 fixes a bug where concurrent TDP MMU page faults can "corrupt" the
unsync shadow page fields, notably unsync_children, as the TDP MMU holds
mmu_lock for read and the unsync logic is not thread safe.

Patch 2 is a tangentially related cleanup.

Sean Christopherson (2):
  KVM: x86/mmu: Protect marking SPs unsync when using TDP MMU with
    spinlock
  KVM: x86/mmu: Drop 'shared' param from tdp_mmu_link_page()

 Documentation/virt/kvm/locking.rst |  8 +++----
 arch/x86/include/asm/kvm_host.h    |  3 +++
 arch/x86/kvm/mmu/mmu.c             | 36 ++++++++++++++++++++++++++++--
 arch/x86/kvm/mmu/mmu_internal.h    |  3 ++-
 arch/x86/kvm/mmu/spte.c            |  4 ++--
 arch/x86/kvm/mmu/spte.h            |  2 +-
 arch/x86/kvm/mmu/tdp_mmu.c         | 20 +++++------------
 7 files changed, 52 insertions(+), 24 deletions(-)

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2.32.0.605.g8dce9f2422-goog