Re: [Qemu-devel] [PATCH v2 06/31] pc: create custom generic PC machine type

[Marcel Apfelbaum <marcel.a@redhat.com>]

On Tue, 2014-05-20 at 17:15 +0200, Igor Mammedov wrote:
> it will be used for PC specific options/variables
> 
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> ---
>  hw/i386/pc.c         |   57 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  hw/i386/pc_piix.c    |   36 +++++++++++++++---------------
>  hw/i386/pc_q35.c     |   12 +++++-----
>  include/hw/i386/pc.h |   24 +++++++++++++++++++++
>  4 files changed, 105 insertions(+), 24 deletions(-)
> 
> diff --git a/hw/i386/pc.c b/hw/i386/pc.c
> index e6369d5..f6781d8 100644
> --- a/hw/i386/pc.c
> +++ b/hw/i386/pc.c
> @@ -1459,3 +1459,60 @@ void ioapic_init_gsi(GSIState *gsi_state, const char *parent_name)
>          gsi_state->ioapic_irq[i] = qdev_get_gpio_in(dev, i);
>      }
>  }
> +
> +static void pc_generic_machine_class_init(ObjectClass *oc, void *data)
> +{
> +    MachineClass *mc = MACHINE_CLASS(oc);
> +    QEMUMachine *qm = data;
> +
> +    mc->name = qm->name;
> +    mc->alias = qm->alias;
> +    mc->desc = qm->desc;
> +    mc->init = qm->init;
> +    mc->reset = qm->reset;
> +    mc->hot_add_cpu = qm->hot_add_cpu;
> +    mc->kvm_type = qm->kvm_type;
> +    mc->block_default_type = qm->block_default_type;
> +    mc->max_cpus = qm->max_cpus;
> +    mc->no_serial = qm->no_serial;
> +    mc->no_parallel = qm->no_parallel;
> +    mc->use_virtcon = qm->use_virtcon;
> +    mc->use_sclp = qm->use_sclp;
> +    mc->no_floppy = qm->no_floppy;
> +    mc->no_cdrom = qm->no_cdrom;
> +    mc->no_sdcard = qm->no_sdcard;
> +    mc->is_default = qm->is_default;
> +    mc->default_machine_opts = qm->default_machine_opts;
> +    mc->default_boot_order = qm->default_boot_order;
> +    mc->compat_props = qm->compat_props;
> +    mc->hw_version = qm->hw_version;
> +}
Hi Igor,
This conflicts with the latest "machine as QOM object" series in which
MachineClass does not have a pointer to QEMUMachine and
pc_generic_machine_class_init is not needed anymore.

If your series will come first we will have a re-base problem on
Andreas's QOM's queue.
Andreas, what's the best practice here?

> +
> +void qemu_register_pc_machine(QEMUMachine *m)
> +{
> +    char *name = g_strconcat(m->name, TYPE_MACHINE_SUFFIX, NULL);
> +    TypeInfo ti = {
> +        .name       = name,
> +        .parent     = TYPE_PC_MACHINE,
> +        .class_init = pc_generic_machine_class_init,
> +        .class_data = (void *)m,
> +    };
> +
> +    type_register(&ti);
> +    g_free(name);
> +}
> +
> +static const TypeInfo pc_machine_info = {
> +    .name = TYPE_PC_MACHINE,
> +    .parent = TYPE_MACHINE,
> +    .abstract = true,
> +    .instance_size = sizeof(PCMachineState),
> +    .class_size = sizeof(PCMachineClass),
> +};
> +
> +static void pc_machine_register_types(void)
> +{
> +    type_register_static(&pc_machine_info);
> +}
> +
> +type_init(pc_machine_register_types)
> diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> index a48e263..abb599b 100644
> --- a/hw/i386/pc_piix.c
> +++ b/hw/i386/pc_piix.c
> @@ -843,25 +843,25 @@ static QEMUMachine xenfv_machine = {
>  
>  static void pc_machine_init(void)
>  {
> -    qemu_register_machine(&pc_i440fx_machine_v2_1);
> -    qemu_register_machine(&pc_i440fx_machine_v2_0);
> -    qemu_register_machine(&pc_i440fx_machine_v1_7);
> -    qemu_register_machine(&pc_i440fx_machine_v1_6);
> -    qemu_register_machine(&pc_i440fx_machine_v1_5);
> -    qemu_register_machine(&pc_i440fx_machine_v1_4);
> -    qemu_register_machine(&pc_machine_v1_3);
> -    qemu_register_machine(&pc_machine_v1_2);
> -    qemu_register_machine(&pc_machine_v1_1);
> -    qemu_register_machine(&pc_machine_v1_0);
> -    qemu_register_machine(&pc_machine_v0_15);
> -    qemu_register_machine(&pc_machine_v0_14);
> -    qemu_register_machine(&pc_machine_v0_13);
> -    qemu_register_machine(&pc_machine_v0_12);
> -    qemu_register_machine(&pc_machine_v0_11);
> -    qemu_register_machine(&pc_machine_v0_10);
> -    qemu_register_machine(&isapc_machine);
> +    qemu_register_pc_machine(&pc_i440fx_machine_v2_1);
> +    qemu_register_pc_machine(&pc_i440fx_machine_v2_0);
> +    qemu_register_pc_machine(&pc_i440fx_machine_v1_7);
> +    qemu_register_pc_machine(&pc_i440fx_machine_v1_6);
> +    qemu_register_pc_machine(&pc_i440fx_machine_v1_5);
> +    qemu_register_pc_machine(&pc_i440fx_machine_v1_4);
> +    qemu_register_pc_machine(&pc_machine_v1_3);
> +    qemu_register_pc_machine(&pc_machine_v1_2);
> +    qemu_register_pc_machine(&pc_machine_v1_1);
> +    qemu_register_pc_machine(&pc_machine_v1_0);
> +    qemu_register_pc_machine(&pc_machine_v0_15);
> +    qemu_register_pc_machine(&pc_machine_v0_14);
> +    qemu_register_pc_machine(&pc_machine_v0_13);
> +    qemu_register_pc_machine(&pc_machine_v0_12);
> +    qemu_register_pc_machine(&pc_machine_v0_11);
> +    qemu_register_pc_machine(&pc_machine_v0_10);
> +    qemu_register_pc_machine(&isapc_machine);
>  #ifdef CONFIG_XEN
> -    qemu_register_machine(&xenfv_machine);
> +    qemu_register_pc_machine(&xenfv_machine);
>  #endif
>  }
>  
> diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
> index b3c02c1..d211393 100644
> --- a/hw/i386/pc_q35.c
> +++ b/hw/i386/pc_q35.c
> @@ -384,12 +384,12 @@ static QEMUMachine pc_q35_machine_v1_4 = {
>  
>  static void pc_q35_machine_init(void)
>  {
> -    qemu_register_machine(&pc_q35_machine_v2_1);
> -    qemu_register_machine(&pc_q35_machine_v2_0);
> -    qemu_register_machine(&pc_q35_machine_v1_7);
> -    qemu_register_machine(&pc_q35_machine_v1_6);
> -    qemu_register_machine(&pc_q35_machine_v1_5);
> -    qemu_register_machine(&pc_q35_machine_v1_4);
> +    qemu_register_pc_machine(&pc_q35_machine_v2_1);
> +    qemu_register_pc_machine(&pc_q35_machine_v2_0);
> +    qemu_register_pc_machine(&pc_q35_machine_v1_7);
> +    qemu_register_pc_machine(&pc_q35_machine_v1_6);
> +    qemu_register_pc_machine(&pc_q35_machine_v1_5);
> +    qemu_register_pc_machine(&pc_q35_machine_v1_4);
>  }
>  
>  machine_init(pc_q35_machine_init);
> diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
> index 32a7687..c7b053c 100644
> --- a/include/hw/i386/pc.h
> +++ b/include/hw/i386/pc.h
> @@ -12,9 +12,33 @@
>  #include "qemu/bitmap.h"
>  #include "sysemu/sysemu.h"
>  #include "hw/pci/pci.h"
> +#include "hw/boards.h"
>  
>  #define HPET_INTCAP "hpet-intcap"
>  
> +struct PCMachineState {
> +    /*< private >*/
> +    MachineState parent_obj;
> +};
> +
> +struct PCMachineClass {
> +    /*< private >*/
> +    MachineClass parent_class;
> +};
> +
> +typedef struct PCMachineState PCMachineState;
> +typedef struct PCMachineClass PCMachineClass;
> +
> +#define TYPE_PC_MACHINE "generic-pc-machine"
I'll name it pc-machine, without introducing the "generic"
code word, but maybe is just me.

Thanks,
Marcel

> +#define PC_MACHINE(obj) \
> +    OBJECT_CHECK(PCMachineState, (obj), TYPE_PC_MACHINE)
> +#define PC_MACHINE_GET_CLASS(obj) \
> +    OBJECT_GET_CLASS(PCMachineClass, (obj), TYPE_PC_MACHINE)
> +#define PC_MACHINE_CLASS(klass) \
> +    OBJECT_CLASS_CHECK(PCMachineClass, (klass), TYPE_PC_MACHINE)
> +
> +void qemu_register_pc_machine(QEMUMachine *m);
> +
>  /* PC-style peripherals (also used by other machines).  */
>  
>  typedef struct PcPciInfo {