diff options
| -rw-r--r-- | virt/kvm/dirty_ring.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/virt/kvm/dirty_ring.c b/virt/kvm/dirty_ring.c index 4caa63e610d2..02bc6b00d76c 100644 --- a/virt/kvm/dirty_ring.c +++ b/virt/kvm/dirty_ring.c @@ -122,6 +122,14 @@ int kvm_dirty_ring_reset(struct kvm *kvm, struct kvm_dirty_ring *ring, unsigned long mask = 0; struct kvm_dirty_gfn *entry; + /* + * Ensure concurrent calls to KVM_RESET_DIRTY_RINGS are serialized, + * e.g. so that KVM fully resets all entries processed by a given call + * before returning to userspace. Holding slots_lock also protects + * the various memslot accesses. + */ + lockdep_assert_held(&kvm->slots_lock); + while (likely((*nr_entries_reset) < INT_MAX)) { if (signal_pending(current)) return -EINTR; |