[RFC,19/20] Insert do_event_tap() to virtio-{blk,net}, comment out assert() on cpu_single_env temporally.

Commit Message

Yoshiaki Tamura April 21, 2010, 5:57 a.m. UTC

None

Patch

diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index b80402d..1dd1c31 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -327,6 +327,8 @@  static void virtio_blk_handle_output(VirtIODevice *vdev, VirtQueue *vq)
         .old_bs = NULL,
     };
 
+    do_event_tap();
+
     while ((req = virtio_blk_get_request(s))) {
         virtio_blk_handle_request(req, &mrb);
     }
diff --git a/hw/virtio-net.c b/hw/virtio-net.c
index 5c0093e..1a32bf3 100644
--- a/hw/virtio-net.c
+++ b/hw/virtio-net.c
@@ -667,6 +667,8 @@  static void virtio_net_handle_tx(VirtIODevice *vdev, VirtQueue *vq)
 {
     VirtIONet *n = to_virtio_net(vdev);
 
+    do_event_tap();
+
     if (n->tx_timer_active) {
         virtio_queue_set_notification(vq, 1);
         qemu_del_timer(n->tx_timer);
diff --git a/qemu-kvm.c b/qemu-kvm.c
index 1414f49..769bc95 100644
--- a/qemu-kvm.c
+++ b/qemu-kvm.c
@@ -935,8 +935,12 @@  int kvm_run(CPUState *env)
 
     post_kvm_run(kvm, env);
 
+    /* TODO: we need to prevent tapping events that derived from the
+     * same VMEXIT. This needs more info from the kernel. */
 #if defined(KVM_CAP_COALESCED_MMIO)
     if (kvm_state->coalesced_mmio) {
+        /* prevent from tapping events while handling coalesced_mmio */
+        event_tap_suspend();
         struct kvm_coalesced_mmio_ring *ring =
             (void *) run + kvm_state->coalesced_mmio * PAGE_SIZE;
         while (ring->first != ring->last) {
@@ -946,6 +950,7 @@  int kvm_run(CPUState *env)
             smp_wmb();
             ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
         }
+        event_tap_resume();
     }
 #endif
 
@@ -1770,7 +1775,7 @@  static void resume_all_threads(void)
 {
     CPUState *penv = first_cpu;
 
-    assert(!cpu_single_env);
+    /* assert(!cpu_single_env); */
 
     while (penv) {
         penv->stop = 0;