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x86: q35: add 'wdat' property

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Used for enabling WDAT based watchdog for builtin iTCO watchdog.
Usage:
    -M q35,wdat={on|off}
By default it is disabled.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20260303092532.2410177-3-imammedo@redhat.com>
This commit is contained in:
Igor Mammedov
2026-03-03 10:25:13 +01:00
committed by Michael S. Tsirkin
parent f793df3dca
commit d30189cce1
2 changed files with 19 additions and 0 deletions
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18
hw/i386/pc_q35.c
View File

@@ -331,6 +331,18 @@ static void pc_q35_init(MachineState *machine)
}
}
static bool pc_q35_machine_get_wdat(Object *o, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(o);
return pcms->wdat_enabled;
}
static void pc_q35_machine_set_wdat(Object *o, bool value, Error **errp)
{
PCMachineState *pcms = PC_MACHINE(o);
pcms->wdat_enabled = value;
}
#define DEFINE_Q35_MACHINE(major, minor) \
DEFINE_PC_VER_MACHINE(pc_q35, "pc-q35", pc_q35_init, false, NULL, major, minor);
@@ -343,6 +355,7 @@ static void pc_q35_init(MachineState *machine)
static void pc_q35_machine_options(MachineClass *m)
{
PCMachineClass *pcmc = PC_MACHINE_CLASS(m);
ObjectClass *oc = OBJECT_CLASS(m);
pcmc->pci_root_uid = 0;
pcmc->default_cpu_version = 1;
@@ -361,6 +374,11 @@ static void pc_q35_machine_options(MachineClass *m)
machine_class_allow_dynamic_sysbus_dev(m, TYPE_RAMFB_DEVICE);
machine_class_allow_dynamic_sysbus_dev(m, TYPE_VMBUS_BRIDGE);
machine_class_allow_dynamic_sysbus_dev(m, TYPE_UEFI_VARS_X64);
object_class_property_add_bool(oc, "wdat",
pc_q35_machine_get_wdat, pc_q35_machine_set_wdat);
object_class_property_set_description(oc, "wdat",
"Enable WDAT watchdog support. Default: off");
compat_props_add(m->compat_props,
pc_q35_compat_defaults, pc_q35_compat_defaults_len);
}

1
include/hw/i386/pc.h
View File

@@ -45,6 +45,7 @@ typedef struct PCMachineState {
const char *south_bridge;
bool acpi_build_enabled;
bool wdat_enabled;
bool smbus_enabled;
bool sata_enabled;
bool hpet_enabled;