ui: dbus-display fix, new gtk config options.

usb: xhci fix, doc updates.
 microvm: no pcie io reservations.
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Merge tag 'kraxel-20220719-pull-request' of https://gitlab.com/kraxel/qemu into staging

ui: dbus-display fix, new gtk config options.
usb: xhci fix, doc updates.
microvm: no pcie io reservations.

# gpg: Signature made Tue 19 Jul 2022 16:21:06 BST
# gpg:                using RSA key A0328CFFB93A17A79901FE7D4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* tag 'kraxel-20220719-pull-request' of https://gitlab.com/kraxel/qemu:
  gtk: Add show_tabs=on|off command line option.
  usb: document pcap (aka usb traffic capture)
  usb: document guest-reset and guest-reset-all
  usb/hcd-xhci: check slotid in xhci_wakeup_endpoint()
  microvm: turn off io reservations for pcie root ports
  dbus-display: fix test race when initializing p2p connection

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

docs/system/devices/usb.rst

@@ -353,3 +353,44 @@ and also assign it to the correct USB bus in QEMU like this:
         -device usb-ehci,id=ehci                             \\
         -device usb-host,bus=usb-bus.0,hostbus=3,hostport=1  \\
         -device usb-host,bus=ehci.0,hostbus=1,hostport=1
+
+``usb-host`` properties for reset behavior
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The ``guest-reset`` and ``guest-reset-all`` properties control
+whenever the guest is allowed to reset the physical usb device on the
+host.  There are three cases:
+
+``guest-reset=false``
+  The guest is not allowed to reset the (physical) usb device.
+
+``guest-reset=true,guest-resets-all=false``
+  The guest is allowed to reset the device when it is not yet
+  initialized (aka no usb bus address assigned).  Usually this results
+  in one guest reset being allowed.  This is the default behavior.
+
+``guest-reset=true,guest-resets-all=true``
+  The guest is allowed to reset the device as it pleases.
+
+The reason for this existing are broken usb devices.  In theory one
+should be able to reset (and re-initialize) usb devices at any time.
+In practice that may result in shitty usb device firmware crashing and
+the device not responding any more until you power-cycle (aka un-plug
+and re-plug) it.
+
+What works best pretty much depends on the behavior of the specific
+usb device at hand, so it's a trial-and-error game.  If the default
+doesn't work, try another option and see whenever the situation
+improves.
+
+record usb transfers
+^^^^^^^^^^^^^^^^^^^^
+
+All usb devices have support for recording the usb traffic.  This can
+be enabled using the ``pcap=<file>`` property, for example:
+
+``-device usb-mouse,pcap=mouse.pcap``
+
+The pcap files are compatible with the linux kernels usbmon.  Many
+tools, including ``wireshark``, can decode and inspect these trace
+files.

hw/i386/microvm.c

@@ -631,6 +631,14 @@ static void microvm_machine_initfn(Object *obj)
     qemu_register_powerdown_notifier(&mms->powerdown_req);
 }
 
+GlobalProperty microvm_properties[] = {
+    /*
+     * pcie host bridge (gpex) on microvm has no io address window,
+     * so reserving io space is not going to work.  Turn it off.
+     */
+    { "pcie-root-port", "io-reserve", "0" },
+};
+
 static void microvm_class_init(ObjectClass *oc, void *data)
 {
     X86MachineClass *x86mc = X86_MACHINE_CLASS(oc);
@@ -707,6 +715,9 @@ static void microvm_class_init(ObjectClass *oc, void *data)
         "Set off to disable adding virtio-mmio devices to the kernel cmdline");
 
     machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE);
+
+    compat_props_add(mc->compat_props, microvm_properties,
+                     G_N_ELEMENTS(microvm_properties));
 }
 
 static const TypeInfo microvm_machine_info = {

hw/usb/hcd-xhci.c

@@ -3269,7 +3269,8 @@ static void xhci_wakeup_endpoint(USBBus *bus, USBEndpoint *ep,
 
     DPRINTF("%s\n", __func__);
     slotid = ep->dev->addr;
-    if (slotid == 0 || !xhci->slots[slotid-1].enabled) {
+    if (slotid == 0 || slotid > xhci->numslots ||
+        !xhci->slots[slotid - 1].enabled) {
         DPRINTF("%s: oops, no slot for dev %d\n", __func__, ep->dev->addr);
         return;
     }

qapi/ui.json

@@ -1195,12 +1195,17 @@
 #               assuming the guest will resize the display to match
 #               the window size then.  Otherwise it defaults to "off".
 #               Since 3.1
+# @show-tabs:   Display the tab bar for switching between the various graphical
+#               interfaces (e.g. VGA and virtual console character devices)
+#               by default.
+#               Since 7.1
 #
 # Since: 2.12
 ##
 { 'struct'  : 'DisplayGTK',
   'data'    : { '*grab-on-hover' : 'bool',
-                '*zoom-to-fit'   : 'bool'  } }
+                '*zoom-to-fit'   : 'bool',
+                '*show-tabs'     : 'bool'  } }
 
 ##
 # @DisplayEGLHeadless:

qemu-options.hx

@@ -1938,7 +1938,7 @@ DEF("display", HAS_ARG, QEMU_OPTION_display,
 #endif
 #if defined(CONFIG_GTK)
     "-display gtk[,full-screen=on|off][,gl=on|off][,grab-on-hover=on|off]\n"
-    "            [,show-cursor=on|off][,window-close=on|off]\n"
+    "            [,show-tabs=on|off][,show-cursor=on|off][,window-close=on|off]\n"
 #endif
 #if defined(CONFIG_VNC)
     "-display vnc=<display>[,<optargs>]\n"
@@ -2023,6 +2023,10 @@ SRST
 
         ``grab-on-hover=on|off`` : Grab keyboard input on mouse hover
 
+        ``show-tabs=on|off`` : Display the tab bar for switching between the
+                               various graphical interfaces (e.g. VGA and
+                               virtual console character devices) by default.
+
         ``show-cursor=on|off`` :  Force showing the mouse cursor
 
         ``window-close=on|off`` : Allow to quit qemu with window close button

ui/dbus.c

@@ -268,6 +268,7 @@ dbus_display_add_client_ready(GObject *source_object,
     }
 
     g_dbus_object_manager_server_set_connection(dbus_display->server, conn);
+    g_dbus_connection_start_message_processing(conn);
 }
 
 
@@ -300,7 +301,8 @@ dbus_display_add_client(int csock, Error **errp)
 
     g_dbus_connection_new(G_IO_STREAM(conn),
                           guid,
-                          G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER,
+                          G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_SERVER |
+                          G_DBUS_CONNECTION_FLAGS_DELAY_MESSAGE_PROCESSING,
                           NULL,
                           dbus_display->add_client_cancellable,
                           dbus_display_add_client_ready,

ui/gtk.c

@@ -2390,6 +2390,10 @@ static void gtk_display_init(DisplayState *ds, DisplayOptions *opts)
         opts->u.gtk.grab_on_hover) {
         gtk_menu_item_activate(GTK_MENU_ITEM(s->grab_on_hover_item));
     }
+    if (opts->u.gtk.has_show_tabs &&
+        opts->u.gtk.show_tabs) {
+        gtk_menu_item_activate(GTK_MENU_ITEM(s->show_tabs_item));
+    }
     gd_clipboard_init(s);
 }