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 b11907617e..8017002a2a 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");
--
2.43.0On 1/8/24 00:22, deller@kernel.org wrote:
> 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 b11907617e..8017002a2a 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");
This almost doubles the uses of default_enabled in the entire tree. I wonder if some of
them are redundant or should be using a different test.
r~
On 1/9/24 10:57, Richard Henderson wrote:
> On 1/8/24 00:22, deller@kernel.org wrote:
>> 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 b11907617e..8017002a2a 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");
>
> This almost doubles the uses of default_enabled in the entire tree.
> I wonder if some of them are redundant or should be using a different
> test.
Any proposal?
Maybe introduce a local variable hppa_bare_metal = !defaults_enabled();
and use that instead?
Helge
On 1/9/24 22:16, Helge Deller wrote:
> On 1/9/24 10:57, Richard Henderson wrote:
>> On 1/8/24 00:22, deller@kernel.org wrote:
>>> 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 b11907617e..8017002a2a 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");
>>
>> This almost doubles the uses of default_enabled in the entire tree.
>> I wonder if some of them are redundant or should be using a different
>> test.
>
> Any proposal?
> Maybe introduce a local variable hppa_bare_metal = !defaults_enabled();
> and use that instead?
No, not like that.
In casual review I am surprised that !defaults_enabled() does not already imply
!enable_graphics, unless the command-line goes on to explicitly add a graphics device.
Am I missing something?
r~
On 1/9/24 17:01, Richard Henderson wrote:
> On 1/9/24 22:16, Helge Deller wrote:
>> On 1/9/24 10:57, Richard Henderson wrote:
>>> On 1/8/24 00:22, deller@kernel.org wrote:
>>>> 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 b11907617e..8017002a2a 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");
>>>
>>> This almost doubles the uses of default_enabled in the entire tree.
>>> I wonder if some of them are redundant or should be using a different
>>> test.
>>
>> Any proposal?
>> Maybe introduce a local variable hppa_bare_metal = !defaults_enabled();
>> and use that instead?
>
> No, not like that.
Ok.
> In casual review I am surprised that !defaults_enabled() does not
> already imply !enable_graphics, unless the command-line goes on to
> explicitly add a graphics device.
> Am I missing something?
Will check that tommorow. If it does I'll remove that additional check.
But what other do you suggest in general how I should address your
concerns here?
Helge
On 11/01/2024 23.28, Helge Deller wrote:
> On 1/9/24 17:01, Richard Henderson wrote:
>> On 1/9/24 22:16, Helge Deller wrote:
>>> On 1/9/24 10:57, Richard Henderson wrote:
>>>> On 1/8/24 00:22, deller@kernel.org wrote:
>>>>> 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 b11907617e..8017002a2a 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");
>>>>
>>>> This almost doubles the uses of default_enabled in the entire tree.
>>>> I wonder if some of them are redundant or should be using a different
>>>> test.
>>>
>>> Any proposal?
>>> Maybe introduce a local variable hppa_bare_metal = !defaults_enabled();
>>> and use that instead?
>>
>> No, not like that.
>
> Ok.
>
>> In casual review I am surprised that !defaults_enabled() does not
>> already imply !enable_graphics, unless the command-line goes on to
>> explicitly add a graphics device.
>> Am I missing something?
>
> Will check that tommorow. If it does I'll remove that additional check.
>
> But what other do you suggest in general how I should address your
> concerns here?
IIRC enable_graphics is not influenced by --nodefaults, but it should be
possible to simply check vga_interface_type only - that should get set to
VGA_NONE when the user started QEMU with --nodefaults.
For networking, other boards normally check nd_table[0]. And for serial, you
can check whether serial_hd(0) returns a non-NULL value.
For checking whether you have to create SCSI devices by default, you can
check drive_get_max_bus(IF_SCSI), I think.
HTH,
Thomas
On 1/12/24 06:09, Thomas Huth wrote:
> On 11/01/2024 23.28, Helge Deller wrote:
>> On 1/9/24 17:01, Richard Henderson wrote:
>>> On 1/9/24 22:16, Helge Deller wrote:
>>>> On 1/9/24 10:57, Richard Henderson wrote:
>>>>> On 1/8/24 00:22, deller@kernel.org wrote:
>>>>>> 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 b11907617e..8017002a2a 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");
>>>>>
>>>>> This almost doubles the uses of default_enabled in the entire tree.
>>>>> I wonder if some of them are redundant or should be using a different
>>>>> test.
>>>>
>>>> Any proposal?
>>>> Maybe introduce a local variable hppa_bare_metal = !defaults_enabled();
>>>> and use that instead?
>>>
>>> No, not like that.
>>
>> Ok.
>>
>>> In casual review I am surprised that !defaults_enabled() does not
>>> already imply !enable_graphics, unless the command-line goes on to
>>> explicitly add a graphics device.
>>> Am I missing something?
>>
>> Will check that tommorow. If it does I'll remove that additional check.
>>
>> But what other do you suggest in general how I should address your
>> concerns here?
>
> IIRC enable_graphics is not influenced by --nodefaults, but it should be possible to simply check vga_interface_type only - that should get set to VGA_NONE when the user started QEMU with --nodefaults.
>
> For networking, other boards normally check nd_table[0]. And for serial, you can check whether serial_hd(0) returns a non-NULL value.
>
> For checking whether you have to create SCSI devices by default, you can check drive_get_max_bus(IF_SCSI), I think.
Thanks a lot!
Those hints really helped me to avoid usage of defaults_enabled().
Helge
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