From: Helge Deller <deller@gmx.de>

Add support for the qemu --nodefaults option, which will disable the
following default devices:
- lsi53c895a SCSI controller,
- artist graphics card,
- LASI 82596 NIC,
- tulip PCI NIC,
- second serial PCI card,
- USB OHCI controller.

Adding this option is very useful to allow manual testing and
debugging of the other possible devices on the command line.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 hw/hppa/machine.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index 6181f4b747..5d3284283b 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -346,11 +346,14 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
     SysBusDevice *s;
 
     /* SCSI disk setup. */
-    dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
-    lsi53c8xx_handle_legacy_cmdline(dev);
+    if (defaults_enabled()) {
+        dev = DEVICE(pci_create_simple(pci_bus, -1, "lsi53c895a"));
+        lsi53c8xx_handle_legacy_cmdline(dev);
+    }
 
     /* Graphics setup. */
-    if (machine->enable_graphics && vga_interface_type != VGA_NONE) {
+    if (defaults_enabled() && machine->enable_graphics &&
+        vga_interface_type != VGA_NONE) {
         vga_interface_created = true;
         dev = qdev_new("artist");
         s = SYS_BUS_DEVICE(dev);
@@ -360,7 +363,7 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
     }
 
     /* Network setup. */
-    if (enable_lasi_lan()) {
+    if (defaults_enabled() && enable_lasi_lan()) {
         lasi_82596_init(addr_space, translate(NULL, LASI_LAN_HPA),
                         qdev_get_gpio_in(lasi_dev, LASI_IRQ_LAN_HPA));
     }
@@ -385,7 +388,7 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
     pci_set_word(&pci_dev->config[PCI_SUBSYSTEM_ID], 0x1227); /* Powerbar */
 
     /* create a second serial PCI card when running Astro */
-    if (!lasi_dev) {
+    if (defaults_enabled() && !lasi_dev) {
         pci_dev = pci_new(-1, "pci-serial-4x");
         qdev_prop_set_chr(DEVICE(pci_dev), "chardev1", serial_hd(1));
         qdev_prop_set_chr(DEVICE(pci_dev), "chardev2", serial_hd(2));
@@ -395,7 +398,7 @@ static void machine_HP_common_init_tail(MachineState *machine, PCIBus *pci_bus,
     }
 
     /* create USB OHCI controller for USB keyboard & mouse on Astro machines */
-    if (!lasi_dev && machine->enable_graphics) {
+    if (defaults_enabled() && !lasi_dev && machine->enable_graphics) {
         pci_create_simple(pci_bus, -1, "pci-ohci");
         usb_create_simple(usb_bus_find(-1), "usb-kbd");
         usb_create_simple(usb_bus_find(-1), "usb-mouse");
-- 
2.43.0