build, pci: remove QMP dependency on core PCI code

by introducing pci-stub.c, eliminate QMP dependency on core PCI code
rquired by query-pci command.
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

Makefile.objs

@@ -169,9 +169,7 @@ hw-obj-y =
 hw-obj-y += vl.o loader.o
 hw-obj-$(CONFIG_VIRTIO) += virtio.o virtio-console.o
 hw-obj-y += fw_cfg.o
-# FIXME: Core PCI code and its direct dependencies are required by the
-# QMP query-pci command.
-hw-obj-y += pci.o pci_bridge.o
+hw-obj-$(CONFIG_PCI) += pci.o pci_bridge.o
 hw-obj-$(CONFIG_PCI) += msix.o msi.o
 hw-obj-$(CONFIG_PCI) += pci_host.o pcie_host.o
 hw-obj-$(CONFIG_PCI) += ioh3420.o xio3130_upstream.o xio3130_downstream.o

Makefile.target

 # -*- Mode: makefile -*-
 
 GENERATED_HEADERS = config-target.h
+CONFIG_NO_PCI = $(if $(subst n,,$(CONFIG_PCI)),n,y)
 CONFIG_NO_KVM = $(if $(subst n,,$(CONFIG_KVM)),n,y)
 
 include ../config-host.mak
@@ -188,6 +189,7 @@ ifdef CONFIG_SOFTMMU
 obj-y = arch_init.o cpus.o monitor.o machine.o gdbstub.o balloon.o
 # virtio has to be here due to weird dependency between PCI and virtio-net.
 # need to fix this properly
+obj-$(CONFIG_NO_PCI) += pci-stub.o
 obj-$(CONFIG_VIRTIO) += virtio-blk.o virtio-balloon.o virtio-net.o virtio-serial-bus.o
 obj-$(CONFIG_VIRTIO_PCI) += virtio-pci.o
 obj-y += vhost_net.o

hw/pci-stub.c

+/*
+ * PCI stubs for plathome that doesn't support pci bus.
+ *
+ * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
+ *                    VA Linux Systems Japan K.K.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "monitor.h"
+#include "pci.h"
+
+static void pci_error_message(Monitor *mon)
+{
+    monitor_printf(mon, "PCI devices not supported\n");
+}
+
+void do_pci_info(Monitor *mon, QObject **ret_data)
+{
+    pci_error_message(mon);
+}
+
+void do_pci_info_print(Monitor *mon, const QObject *data)
+{
+    pci_error_message(mon);
+}