diff options
| author | Sean Christopherson <seanjc@google.com> | 2023-07-28 18:35:32 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-08-31 14:08:17 -0400 |
| commit | 427c76aed29ec12a57f11546a5036df3cc52855e (patch) | |
| tree | d5fee7d8cd943b48427c3b8b510ba99b94a94cc3 /arch | |
| parent | e18c5429e0c4bf7b550211245dcbfc61e71a7e6f (diff) | |
KVM: x86/mmu: Bug the VM if write-tracking is used but not enabled
Bug the VM if something attempts to write-track a gfn, but write-tracking
isn't enabled. The VM is doomed (and KVM has an egregious bug) if KVM or
KVMGT wants to shadow guest page tables but can't because write-tracking
isn't enabled.
Tested-by: Yongwei Ma <yongwei.ma@intel.com>
Link: https://lore.kernel.org/r/20230729013535.1070024-27-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/mmu/page_track.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu/page_track.c b/arch/x86/kvm/mmu/page_track.c index 2c6b912072b7..9bf01311ee9c 100644 --- a/arch/x86/kvm/mmu/page_track.c +++ b/arch/x86/kvm/mmu/page_track.c @@ -90,7 +90,7 @@ void kvm_write_track_add_gfn(struct kvm *kvm, struct kvm_memory_slot *slot, lockdep_assert_once(lockdep_is_held(&kvm->slots_lock) || srcu_read_lock_held(&kvm->srcu)); - if (WARN_ON_ONCE(!kvm_page_track_write_tracking_enabled(kvm))) + if (KVM_BUG_ON(!kvm_page_track_write_tracking_enabled(kvm), kvm)) return; update_gfn_write_track(slot, gfn, 1); @@ -122,7 +122,7 @@ void kvm_write_track_remove_gfn(struct kvm *kvm, lockdep_assert_once(lockdep_is_held(&kvm->slots_lock) || srcu_read_lock_held(&kvm->srcu)); - if (WARN_ON_ONCE(!kvm_page_track_write_tracking_enabled(kvm))) + if (KVM_BUG_ON(!kvm_page_track_write_tracking_enabled(kvm), kvm)) return; update_gfn_write_track(slot, gfn, -1); |