Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pc,pci,virtio: features, fixes, tests

vhost user rng
vdpa multiqueue
Fixes, cleanups, new tests all over the place.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Wed 20 Oct 2021 03:18:24 AM PDT
# gpg:                using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg:                issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]

* remotes/mst/tags/for_upstream: (44 commits)
  tests/acpi/bios-tables-test: update DSDT blob for multifunction bridge test
  tests/acpi/pcihp: add unit tests for hotplug on multifunction bridges for q35
  tests/acpi/bios-tables-test: add and allow changes to a new q35 DSDT table blob
  pci: fix PCI resource reserve capability on BE
  vhost-vdpa: multiqueue support
  virtio-net: vhost control virtqueue support
  vhost: record the last virtqueue index for the virtio device
  virtio-net: use "queue_pairs" instead of "queues" when possible
  vhost-net: control virtqueue support
  net: introduce control client
  vhost-vdpa: let net_vhost_vdpa_init() returns NetClientState *
  vhost-vdpa: prepare for the multiqueue support
  vhost-vdpa: classify one time request
  vhost-vdpa: open device fd in net_init_vhost_vdpa()
  bios-tables-test: don't disassemble empty files
  rebuild-expected-aml.sh: allow partial target list
  qdev/qbus: remove failover specific code
  vhost-user-blk-test: pass vhost-user socket fds to QSD
  failover: fix a regression introduced by JSON'ification of -device
  vhost-user: fix duplicated notifier MR init
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 41 insertions, 14 deletions

diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
index 386ec2eaa2..0d888f29a6 100644
--- a/hw/net/vhost_net.c
+++ b/hw/net/vhost_net.c
@@ -231,9 +231,11 @@ fail:
     return NULL;
 }
 
-static void vhost_net_set_vq_index(struct vhost_net *net, int vq_index)
+static void vhost_net_set_vq_index(struct vhost_net *net, int vq_index,
+                                   int last_index)
 {
     net->dev.vq_index = vq_index;
+    net->dev.last_index = last_index;
 }
 
 static int vhost_net_start_one(struct vhost_net *net,
@@ -315,25 +317,37 @@ static void vhost_net_stop_one(struct vhost_net *net,
 }
 
 int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
-                    int total_queues)
+                    int data_queue_pairs, int cvq)
 {
     BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(dev)));
     VirtioBusState *vbus = VIRTIO_BUS(qbus);
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus);
+    int total_notifiers = data_queue_pairs * 2 + cvq;
+    VirtIONet *n = VIRTIO_NET(dev);
+    int nvhosts = data_queue_pairs + cvq;
     struct vhost_net *net;
-    int r, e, i;
+    int r, e, i, last_index = data_queue_pairs * 2;
     NetClientState *peer;
 
+    if (!cvq) {
+        last_index -= 1;
+    }
+
     if (!k->set_guest_notifiers) {
         error_report("binding does not support guest notifiers");
         return -ENOSYS;
     }
 
-    for (i = 0; i < total_queues; i++) {
+    for (i = 0; i < nvhosts; i++) {
+
+        if (i < data_queue_pairs) {
+            peer = qemu_get_peer(ncs, i);
+        } else { /* Control Virtqueue */
+            peer = qemu_get_peer(ncs, n->max_queue_pairs);
+        }
 
-        peer = qemu_get_peer(ncs, i);
         net = get_vhost_net(peer);
-        vhost_net_set_vq_index(net, i * 2);
+        vhost_net_set_vq_index(net, i * 2, last_index);
 
         /* Suppress the masking guest notifiers on vhost user
          * because vhost user doesn't interrupt masking/unmasking
@@ -344,14 +358,18 @@ int vhost_net_start(VirtIODevice *dev, NetClientState *ncs,
         }
      }
 
-    r = k->set_guest_notifiers(qbus->parent, total_queues * 2, true);
+    r = k->set_guest_notifiers(qbus->parent, total_notifiers, true);
     if (r < 0) {
         error_report("Error binding guest notifier: %d", -r);
         goto err;
     }
 
-    for (i = 0; i < total_queues; i++) {
-        peer = qemu_get_peer(ncs, i);
+    for (i = 0; i < nvhosts; i++) {
+        if (i < data_queue_pairs) {
+            peer = qemu_get_peer(ncs, i);
+        } else {
+            peer = qemu_get_peer(ncs, n->max_queue_pairs);
+        }
         r = vhost_net_start_one(get_vhost_net(peer), dev);
 
         if (r < 0) {
@@ -375,7 +393,7 @@ err_start:
         peer = qemu_get_peer(ncs , i);
         vhost_net_stop_one(get_vhost_net(peer), dev);
     }
-    e = k->set_guest_notifiers(qbus->parent, total_queues * 2, false);
+    e = k->set_guest_notifiers(qbus->parent, total_notifiers, false);
     if (e < 0) {
         fprintf(stderr, "vhost guest notifier cleanup failed: %d\n", e);
         fflush(stderr);
@@ -385,18 +403,27 @@ err:
 }
 
 void vhost_net_stop(VirtIODevice *dev, NetClientState *ncs,
-                    int total_queues)
+                    int data_queue_pairs, int cvq)
 {
     BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(dev)));
     VirtioBusState *vbus = VIRTIO_BUS(qbus);
     VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(vbus);
+    VirtIONet *n = VIRTIO_NET(dev);
+    NetClientState *peer;
+    int total_notifiers = data_queue_pairs * 2 + cvq;
+    int nvhosts = data_queue_pairs + cvq;
     int i, r;
 
-    for (i = 0; i < total_queues; i++) {
-        vhost_net_stop_one(get_vhost_net(ncs[i].peer), dev);
+    for (i = 0; i < nvhosts; i++) {
+        if (i < data_queue_pairs) {
+            peer = qemu_get_peer(ncs, i);
+        } else {
+            peer = qemu_get_peer(ncs, n->max_queue_pairs);
+        }
+        vhost_net_stop_one(get_vhost_net(peer), dev);
     }
 
-    r = k->set_guest_notifiers(qbus->parent, total_queues * 2, false);
+    r = k->set_guest_notifiers(qbus->parent, total_notifiers, false);
     if (r < 0) {
         fprintf(stderr, "vhost guest notifier cleanup failed: %d\n", r);
         fflush(stderr);