hw/i386: Ignore the default parallel port if it has not been compiled…

… into QEMU

Don't try to instantiate the parallel port if it has not been
enabled in the build configuration.

Message-Id: <20230512124033.502654-10-thuth@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

hw/i386/pc_piix.c

@@ -26,6 +26,7 @@
 #include CONFIG_DEVICES
 
 #include "qemu/units.h"
+#include "hw/char/parallel.h"
 #include "hw/dma/i8257.h"
 #include "hw/loader.h"
 #include "hw/i386/x86.h"
@@ -458,6 +459,7 @@ static void pc_i440fx_machine_options(MachineClass *m)
     m->default_machine_opts = "firmware=bios-256k.bin";
     m->default_display = "std";
     m->default_nic = "e1000";
+    m->no_parallel = !module_object_class_by_name(TYPE_ISA_PARALLEL);
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_RAMFB_DEVICE);
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_VMBUS_BRIDGE);
 }
@@ -886,6 +888,7 @@ static void isapc_machine_options(MachineClass *m)
     pcmc->has_reserved_memory = false;
     m->default_nic = "ne2k_isa";
     m->default_cpu_type = X86_CPU_TYPE_NAME("486");
+    m->no_parallel = !module_object_class_by_name(TYPE_ISA_PARALLEL);
 }
 
 DEFINE_PC_MACHINE(isapc, "isapc", pc_init_isa,

hw/i386/pc_q35.c

@@ -30,6 +30,7 @@
 
 #include "qemu/osdep.h"
 #include "qemu/units.h"
+#include "hw/char/parallel.h"
 #include "hw/loader.h"
 #include "hw/i2c/smbus_eeprom.h"
 #include "hw/rtc/mc146818rtc.h"
@@ -367,6 +368,7 @@ static void pc_q35_machine_options(MachineClass *m)
     m->default_nic = "e1000e";
     m->default_kernel_irqchip_split = false;
     m->no_floppy = 1;
+    m->no_parallel = !module_object_class_by_name(TYPE_ISA_PARALLEL);
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_AMD_IOMMU_DEVICE);
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_INTEL_IOMMU_DEVICE);
     machine_class_allow_dynamic_sysbus_dev(m, TYPE_RAMFB_DEVICE);