[Qemu-devel] [PATCH] spapr: skip adding usb keyboard/mouse in case of -nodefaults

[Nikunj A Dadhania]

The following commit caused the regression in qemu-system-ppc64

7effdaa3: spapr: Fix return value of vga initialization
d44229c5: Fix vga_interface_type for command line argument '-device VGA'

Even when -nodefaults was provided, USB Keyboard and Mouse was added
to the machine. This breaks libvirt which uses -nodefaults and adds
the keyboard and mouse separately. The machine got 2 USB Keyboards
and 2 USB Mouses.

CC: Paolo Bonzini <pbonz...@redhat.com>
CC: Mark Wu <wu...@linux.vnet.ibm.com>
CC: Andreas Färber <afaer...@suse.de>
Signed-off-by: Nikunj A Dadhania <nik...@linux.vnet.ibm.com>
---
 hw/ppc/spapr.c          |  6 +++++-
 include/sysemu/sysemu.h |  1 +
 vl.c                    | 10 ++++++++--
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index a11e121..3095626 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1328,7 +1328,11 @@ static void ppc_spapr_init(QEMUMachineInitArgs *args)
 
     if (usb_enabled(spapr->has_graphics)) {
         pci_create_simple(phb->bus, -1, "pci-ohci");
-        if (spapr->has_graphics) {
+        /*
+         * For VGA/VNC, by default add usb keyboard/mouse, if -nodefaults
+         * provided skip adding usb keyboard/mouse
+         */
+        if (spapr->has_graphics && qemu_has_defaults()) {
             usbdevice_create("keyboard");
             usbdevice_create("mouse");
         }
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index ba5c7f8..8e90ad0 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -200,6 +200,7 @@ DeviceState *get_boot_device(uint32_t position);
 QemuOpts *qemu_get_machine_opts(void);
 
 bool usb_enabled(bool default_usb);
+bool qemu_has_defaults(void);
 
 extern QemuOptsList qemu_legacy_drive_opts;
 extern QemuOptsList qemu_common_drive_opts;
diff --git a/vl.c b/vl.c
index 9975e5a..6bf37a2 100644
--- a/vl.c
+++ b/vl.c
@@ -977,8 +977,14 @@ static void parse_name(QemuOpts *opts)
 
 bool usb_enabled(bool default_usb)
 {
-    return qemu_opt_get_bool(qemu_get_machine_opts(), "usb",
-                             has_defaults && default_usb);
+  return qemu_opt_get_bool(qemu_get_machine_opts(), "usb",
+                          has_defaults && default_usb);
+}
+
+bool qemu_has_defaults(void)
+{
+  fprintf(stderr, "has_d %d\n", has_defaults);
+  return has_defaults;
 }
 
 #ifndef _WIN32
-- 
1.8.3.1