KVM x86 MMU changes for 6.10:

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- Process TDP MMU SPTEs that are are zapped while holding mmu_lock for read
    after replacing REMOVED_SPTE with '0' and flushing remote TLBs, which allows
    vCPU tasks to repopulate the zapped region while the zapper finishes tearing
    down the old, defunct page tables.
 
  - Fix a longstanding, likely benign-in-practice race where KVM could fail to
    detect a write from kvm_mmu_track_write() to a shadowed GPTE if the GPTE is
    first page table being shadowed.
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Merge tag 'kvm-x86-mmu-6.10' of https://github.com/kvm-x86/linux into HEAD

KVM x86 MMU changes for 6.10:

 - Process TDP MMU SPTEs that are are zapped while holding mmu_lock for read
   after replacing REMOVED_SPTE with '0' and flushing remote TLBs, which allows
   vCPU tasks to repopulate the zapped region while the zapper finishes tearing
   down the old, defunct page tables.

 - Fix a longstanding, likely benign-in-practice race where KVM could fail to
   detect a write from kvm_mmu_track_write() to a shadowed GPTE if the GPTE is
   first page table being shadowed.

...

This commit is contained in:

Paolo Bonzini 2024-05-12 03:18:30 -04:00

parent dee7ea42a1 226d9b8f16

commit 5a1c72e07e

2 changed files with 66 additions and 29 deletions

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20

arch/x86/kvm/mmu/mmu.c

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75

arch/x86/kvm/mmu/tdp_mmu.c

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