[Qemu-devel] [RFC PATCH v2 01/12] pc: make smbus configurable

[Chao Peng <chao.p.peng@linux.intel.com>]

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
---
 hw/i386/pc.c         | 23 +++++++++++++++++++++++
 hw/i386/pc_q35.c     | 12 +++++++-----
 include/hw/i386/pc.h |  3 +++
 3 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index 022dd1b..66e1961 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -2005,6 +2005,27 @@ static HotplugHandler *pc_get_hotpug_handler(MachineState *machine,
         pcmc->get_hotplug_handler(machine, dev) : NULL;
 }
 
+static void pc_machine_get_prop_bool(Object *obj, Visitor *v, const char *name,
+                                     void *opaque, Error **errp)
+{
+    bool value = *(bool *)opaque;
+
+    visit_type_bool(v, name, &value, errp);
+}
+
+static void pc_machine_set_prop_bool(Object *obj, Visitor *v, const char *name,
+                                     void *opaque, Error **errp)
+{
+    visit_type_bool(v, name, (bool *)opaque, errp);
+}
+
+#define PC_MACHINE_DEFINE_PROP_BOOL(pcms, prop, field, defval)      \
+        pcms->field = defval;                                       \
+        object_property_add(OBJECT(pcms), prop, "bool",             \
+                            pc_machine_get_prop_bool,               \
+                            pc_machine_set_prop_bool,               \
+                            NULL, &pcms->field, &error_abort);
+
 static void
 pc_machine_get_hotplug_memory_region_size(Object *obj, Visitor *v,
                                           const char *name, void *opaque,
@@ -2168,6 +2189,8 @@ static void pc_machine_initfn(Object *obj)
     pcms->acpi_nvdimm_state.is_enabled = false;
     object_property_add_bool(obj, PC_MACHINE_NVDIMM, pc_machine_get_nvdimm,
                              pc_machine_set_nvdimm, &error_abort);
+
+    PC_MACHINE_DEFINE_PROP_BOOL(pcms, PC_MACHINE_SMBUS, smbus, true);
 }
 
 static void pc_machine_reset(void)
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index c0b9961..5bb19c1 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -247,11 +247,13 @@ static void pc_q35_init(MachineState *machine)
         ehci_create_ich9_with_companions(host_bus, 0x1d);
     }
 
-    /* TODO: Populate SPD eeprom data.  */
-    smbus_eeprom_init(ich9_smb_init(host_bus,
-                                    PCI_DEVFN(ICH9_SMB_DEV, ICH9_SMB_FUNC),
-                                    0xb100),
-                      8, NULL, 0);
+    if (pcms->smbus) {
+        /* TODO: Populate SPD eeprom data.  */
+        smbus_eeprom_init(ich9_smb_init(host_bus,
+                                        PCI_DEVFN(ICH9_SMB_DEV, ICH9_SMB_FUNC),
+                                        0xb100),
+                          8, NULL, 0);
+    }
 
     pc_cmos_init(pcms, idebus[0], idebus[1], rtc_state);
 
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 74c175c..aec809c 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -76,6 +76,8 @@ struct PCMachineState {
     /* Address space used by IOAPIC device. All IOAPIC interrupts
      * will be translated to MSI messages in the address space. */
     AddressSpace *ioapic_as;
+
+    bool smbus;
 };
 
 #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
@@ -84,6 +86,7 @@ struct PCMachineState {
 #define PC_MACHINE_VMPORT           "vmport"
 #define PC_MACHINE_SMM              "smm"
 #define PC_MACHINE_NVDIMM           "nvdimm"
+#define PC_MACHINE_SMBUS            "smbus"
 
 /**
  * PCMachineClass:
-- 
1.8.3.1