Include sysemu/sysemu.h a lot less

In my "build everything" tree, changing sysemu/sysemu.h triggers a
recompile of some 5400 out of 6600 objects (not counting tests and
objects that don't depend on qemu/osdep.h).

hw/qdev-core.h includes sysemu/sysemu.h since recent commit e965ffa70a
"qdev: add qdev_add_vm_change_state_handler()".  This is a bad idea:
hw/qdev-core.h is widely included.

Move the declaration of qdev_add_vm_change_state_handler() to
sysemu/sysemu.h, and drop the problematic include from hw/qdev-core.h.

Touching sysemu/sysemu.h now recompiles some 1800 objects.
qemu/uuid.h also drops from 5400 to 1800.  A few more headers show
smaller improvement: qemu/notify.h drops from 5600 to 5200,
qemu/timer.h from 5600 to 4500, and qapi/qapi-types-run-state.h from
5500 to 5000.

Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20190812052359.30071-28-armbru@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>

accel/kvm/kvm-all.c

@@ -29,6 +29,7 @@
 #include "exec/gdbstub.h"
 #include "sysemu/kvm_int.h"
 #include "sysemu/cpus.h"
+#include "sysemu/sysemu.h"
 #include "qemu/bswap.h"
 #include "exec/memory.h"
 #include "exec/ram_addr.h"

backends/hostmem.c

@@ -12,6 +12,7 @@
 
 #include "qemu/osdep.h"
 #include "sysemu/hostmem.h"
+#include "sysemu/sysemu.h"
 #include "hw/boards.h"
 #include "qapi/error.h"
 #include "qapi/qapi-builtin-visit.h"

cpus.c

@@ -41,6 +41,7 @@
 #include "sysemu/kvm.h"
 #include "sysemu/hax.h"
 #include "sysemu/hvf.h"
+#include "sysemu/sysemu.h"
 #include "sysemu/whpx.h"
 #include "exec/exec-all.h"
 

hw/arm/allwinner-a10.c

@@ -23,6 +23,7 @@
 #include "hw/sysbus.h"
 #include "hw/arm/allwinner-a10.h"
 #include "hw/misc/unimp.h"
+#include "sysemu/sysemu.h"
 
 static void aw_a10_init(Object *obj)
 {

hw/arm/aspeed_soc.c

@@ -22,6 +22,7 @@
 #include "qemu/error-report.h"
 #include "hw/i2c/aspeed_i2c.h"
 #include "net/net.h"
+#include "sysemu/sysemu.h"
 
 #define ASPEED_SOC_IOMEM_SIZE       0x00200000
 

hw/arm/kzm.c

@@ -24,6 +24,7 @@
 #include "hw/net/lan9118.h"
 #include "hw/char/serial.h"
 #include "sysemu/qtest.h"
+#include "sysemu/sysemu.h"
 
 /* Memory map for Kzm Emulation Baseboard:
  * 0x00000000-0x7fffffff See i.MX31 SOC for support

hw/arm/msf2-soc.c

@@ -30,6 +30,7 @@
 #include "hw/irq.h"
 #include "hw/arm/msf2-soc.h"
 #include "hw/misc/unimp.h"
+#include "sysemu/sysemu.h"
 
 #define MSF2_TIMER_BASE       0x40004000
 #define MSF2_SYSREG_BASE      0x40038000

hw/arm/stm32f205_soc.c

@@ -29,6 +29,7 @@
 #include "exec/address-spaces.h"
 #include "hw/arm/stm32f205_soc.h"
 #include "hw/qdev-properties.h"
+#include "sysemu/sysemu.h"
 
 /* At the moment only Timer 2 to 5 are modelled */
 static const uint32_t timer_addr[STM_NUM_TIMERS] = { 0x40000000, 0x40000400,

hw/char/serial-isa.c

@@ -26,6 +26,7 @@
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qemu/module.h"
+#include "sysemu/sysemu.h"
 #include "hw/char/serial.h"
 #include "hw/isa/isa.h"
 #include "hw/qdev-properties.h"

hw/char/xen_console.c

@@ -24,6 +24,7 @@
 #include <termios.h>
 
 #include "qapi/error.h"
+#include "sysemu/sysemu.h"
 #include "chardev/char-fe.h"
 #include "hw/xen/xen-legacy-backend.h"
 

hw/core/numa.c

@@ -25,6 +25,7 @@
 #include "qemu/osdep.h"
 #include "sysemu/hostmem.h"
 #include "sysemu/numa.h"
+#include "sysemu/sysemu.h"
 #include "exec/cpu-common.h"
 #include "exec/ramlist.h"
 #include "qemu/bitmap.h"

hw/core/vm-change-state-handler.c

@@ -17,6 +17,7 @@
 
 #include "qemu/osdep.h"
 #include "hw/qdev-core.h"
+#include "sysemu/sysemu.h"
 
 static int qdev_get_dev_tree_depth(DeviceState *dev)
 {

hw/display/qxl-render.c

@@ -21,6 +21,7 @@
 
 #include "qemu/osdep.h"
 #include "qxl.h"
+#include "sysemu/sysemu.h"
 #include "trace.h"
 
 static void qxl_blit(PCIQXLDevice *qxl, QXLRect *rect)

hw/i386/xen/xen-hvm.c

@@ -25,6 +25,7 @@
 #include "qemu/error-report.h"
 #include "qemu/main-loop.h"
 #include "qemu/range.h"
+#include "sysemu/sysemu.h"
 #include "sysemu/xen-mapcache.h"
 #include "trace.h"
 #include "exec/address-spaces.h"

hw/i386/xen/xen-mapcache.c

@@ -17,6 +17,7 @@
 #include "hw/xen/xen-legacy-backend.h"
 #include "qemu/bitmap.h"
 
+#include "sysemu/sysemu.h"
 #include "sysemu/xen-mapcache.h"
 #include "trace.h"
 

hw/intc/ioapic.c

@@ -30,6 +30,7 @@
 #include "hw/pci/msi.h"
 #include "hw/qdev-properties.h"
 #include "sysemu/kvm.h"
+#include "sysemu/sysemu.h"
 #include "hw/i386/apic-msidef.h"
 #include "hw/i386/x86-iommu.h"
 #include "trace.h"

hw/pci/pci.c

@@ -35,6 +35,7 @@
 #include "monitor/monitor.h"
 #include "net/net.h"
 #include "sysemu/numa.h"
+#include "sysemu/sysemu.h"
 #include "hw/loader.h"
 #include "qemu/error-report.h"
 #include "qemu/range.h"

hw/riscv/sifive_e.c

@@ -46,6 +46,7 @@
 #include "hw/riscv/boot.h"
 #include "chardev/char.h"
 #include "sysemu/arch_init.h"
+#include "sysemu/sysemu.h"
 #include "exec/address-spaces.h"
 
 static const struct MemmapEntry {

hw/riscv/sifive_u.c

@@ -44,6 +44,7 @@
 #include "chardev/char.h"
 #include "sysemu/arch_init.h"
 #include "sysemu/device_tree.h"
+#include "sysemu/sysemu.h"
 #include "exec/address-spaces.h"
 
 #include <libfdt.h>

hw/riscv/spike.c

@@ -40,6 +40,7 @@
 #include "sysemu/arch_init.h"
 #include "sysemu/device_tree.h"
 #include "sysemu/qtest.h"
+#include "sysemu/sysemu.h"
 #include "exec/address-spaces.h"
 
 #include <libfdt.h>

hw/riscv/virt.c

@@ -37,6 +37,7 @@
 #include "chardev/char.h"
 #include "sysemu/arch_init.h"
 #include "sysemu/device_tree.h"
+#include "sysemu/sysemu.h"
 #include "exec/address-spaces.h"
 #include "hw/pci/pci.h"
 #include "hw/pci-host/gpex.h"

hw/sparc64/niagara.c

@@ -35,7 +35,7 @@
 #include "sysemu/block-backend.h"
 #include "qemu/error-report.h"
 #include "sysemu/qtest.h"
-
+#include "sysemu/sysemu.h"
 
 typedef struct NiagaraBoardState {
     MemoryRegion hv_ram;

hw/usb/hcd-ehci.h

@@ -21,6 +21,7 @@
 #include "qemu/timer.h"
 #include "hw/usb.h"
 #include "sysemu/dma.h"
+#include "sysemu/sysemu.h"
 #include "hw/pci/pci.h"
 #include "hw/sysbus.h"
 

hw/xen/xen-common.c

@@ -14,6 +14,7 @@
 #include "hw/xen/xen-legacy-backend.h"
 #include "chardev/char.h"
 #include "sysemu/accel.h"
+#include "sysemu/sysemu.h"
 #include "migration/misc.h"
 #include "migration/global_state.h"
 

hw/xen/xen_devconfig.c

@@ -2,6 +2,7 @@
 #include "hw/xen/xen-legacy-backend.h"
 #include "qemu/option.h"
 #include "sysemu/blockdev.h"
+#include "sysemu/sysemu.h"
 
 /* ------------------------------------------------------------- */
 

hw/xenpv/xen_machine_pv.c

@@ -28,6 +28,7 @@
 #include "hw/xen/xen-legacy-backend.h"
 #include "hw/xen/xen-bus.h"
 #include "sysemu/block-backend.h"
+#include "sysemu/sysemu.h"
 
 static void xen_init_pv(MachineState *machine)
 {

include/hw/qdev-core.h

@@ -5,7 +5,6 @@
 #include "qemu/bitmap.h"
 #include "qom/object.h"
 #include "hw/hotplug.h"
-#include "sysemu/sysemu.h"
 
 enum {
     DEV_NVECTORS_UNSPECIFIED = -1,
@@ -451,8 +450,4 @@ static inline bool qbus_is_hotpluggable(BusState *bus)
 void device_listener_register(DeviceListener *listener);
 void device_listener_unregister(DeviceListener *listener);
 
-VMChangeStateEntry *qdev_add_vm_change_state_handler(DeviceState *dev,
-                                                     VMChangeStateHandler *cb,
-                                                     void *opaque);
-
 #endif

include/sysemu/sysemu.h

@@ -29,6 +29,9 @@ VMChangeStateEntry *qemu_add_vm_change_state_handler(VMChangeStateHandler *cb,
                                                      void *opaque);
 VMChangeStateEntry *qemu_add_vm_change_state_handler_prio(
         VMChangeStateHandler *cb, void *opaque, int priority);
+VMChangeStateEntry *qdev_add_vm_change_state_handler(DeviceState *dev,
+                                                     VMChangeStateHandler *cb,
+                                                     void *opaque);
 void qemu_del_vm_change_state_handler(VMChangeStateEntry *e);
 void vm_state_notify(int running, RunState state);
 

migration/global_state.c

@@ -13,6 +13,7 @@
 #include "qemu/osdep.h"
 #include "qemu/cutils.h"
 #include "qemu/error-report.h"
+#include "sysemu/sysemu.h"
 #include "qapi/error.h"
 #include "migration.h"
 #include "migration/global_state.h"

migration/migration.c

@@ -21,6 +21,7 @@
 #include "exec.h"
 #include "fd.h"
 #include "socket.h"
+#include "sysemu/sysemu.h"
 #include "rdma.h"
 #include "ram.h"
 #include "migration/global_state.h"

migration/savevm.c

@@ -57,6 +57,7 @@
 #include "io/channel-buffer.h"
 #include "io/channel-file.h"
 #include "sysemu/replay.h"
+#include "sysemu/sysemu.h"
 #include "qjson.h"
 #include "migration/colo.h"
 #include "qemu/bitmap.h"