x86: ich9: expose "smi_negotiated_features" as a QOM property

Expose the "smi_negotiated_features" field of ICH9LPCState as
a QOM property.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20200923094650.1301166-7-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/isa/lpc_ich9.c

@@ -647,6 +647,9 @@ static void ich9_lpc_initfn(Object *obj)
                                   &acpi_enable_cmd, OBJ_PROP_FLAG_READ);
     object_property_add_uint8_ptr(OBJECT(lpc), ACPI_PM_PROP_ACPI_DISABLE_CMD,
                                   &acpi_disable_cmd, OBJ_PROP_FLAG_READ);
+    object_property_add_uint64_ptr(obj, ICH9_LPC_SMI_NEGOTIATED_FEAT_PROP,
+                                   &lpc->smi_negotiated_features,
+                                   OBJ_PROP_FLAG_READ);
 
     ich9_pm_add_properties(obj, &lpc->pm);
 }

include/hw/i386/ich9.h

@@ -245,6 +245,8 @@ struct ICH9LPCState {
 #define ICH9_SMB_HST_D1                         0x06
 #define ICH9_SMB_HOST_BLOCK_DB                  0x07
 
+#define ICH9_LPC_SMI_NEGOTIATED_FEAT_PROP "x-smi-negotiated-features"
+
 /* bit positions used in fw_cfg SMI feature negotiation */
 #define ICH9_LPC_SMI_F_BROADCAST_BIT            0
 #define ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT          1