diff options
| author | Jason Wang <jasowang@redhat.com> | 2015-09-15 14:41:54 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-22 14:49:12 -0700 |
| commit | 0986ae9a1160edb74b0b75f591296f508e44f8e0 (patch) | |
| tree | 503e47b185ce909743c4e5cf20ad5870a2d9dce3 /virt | |
| parent | f9f83f3cfce00b9b862620f77b2809d13771a37b (diff) | |
kvm: don't try to register to KVM_FAST_MMIO_BUS for non mmio eventfd
commit 8453fecbecae26edb3f278627376caab05d9a88d upstream.
We only want zero length mmio eventfd to be registered on
KVM_FAST_MMIO_BUS. So check this explicitly when arg->len is zero to
make sure this.
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/eventfd.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index 9ff4193dfa49..e404806e3a7a 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -846,7 +846,7 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) /* When length is ignored, MMIO is also put on a separate bus, for * faster lookups. */ - if (!args->len && !(args->flags & KVM_IOEVENTFD_FLAG_PIO)) { + if (!args->len && bus_idx == KVM_MMIO_BUS) { ret = kvm_io_bus_register_dev(kvm, KVM_FAST_MMIO_BUS, p->addr, 0, &p->dev); if (ret < 0) @@ -901,7 +901,7 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) continue; kvm_io_bus_unregister_dev(kvm, bus_idx, &p->dev); - if (!p->length) { + if (!p->length && p->bus_idx == KVM_MMIO_BUS) { kvm_io_bus_unregister_dev(kvm, KVM_FAST_MMIO_BUS, &p->dev); } |