accel: Forward-declare AccelOpsClass in 'qemu/typedefs.h'

The heavily imported "system/cpus.h" header includes "accel-ops.h"
to get AccelOpsClass type declaration. Reduce headers pressure by
forward declaring it in "qemu/typedefs.h", where we already
declare the AccelCPUState type.

Reduce "system/cpus.h" inclusions by only including
"system/accel-ops.h" when necessary.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250123234415.59850-14-philmd@linaro.org>

accel/accel-system.c

@@ -26,6 +26,7 @@
 #include "qemu/osdep.h"
 #include "qemu/accel.h"
 #include "hw/boards.h"
+#include "system/accel-ops.h"
 #include "system/cpus.h"
 #include "qemu/error-report.h"
 #include "accel-system.h"

accel/hvf/hvf-accel-ops.c

@@ -54,6 +54,7 @@
 #include "exec/exec-all.h"
 #include "gdbstub/enums.h"
 #include "hw/boards.h"
+#include "system/accel-ops.h"
 #include "system/cpus.h"
 #include "system/hvf.h"
 #include "system/hvf_int.h"

accel/kvm/kvm-accel-ops.c

@@ -16,6 +16,7 @@
 #include "qemu/osdep.h"
 #include "qemu/error-report.h"
 #include "qemu/main-loop.h"
+#include "system/accel-ops.h"
 #include "system/kvm.h"
 #include "system/kvm_int.h"
 #include "system/runstate.h"

accel/qtest/qtest.c

@@ -18,6 +18,7 @@
 #include "qemu/option.h"
 #include "qemu/config-file.h"
 #include "qemu/accel.h"
+#include "system/accel-ops.h"
 #include "system/qtest.h"
 #include "system/cpus.h"
 #include "qemu/guest-random.h"

accel/tcg/cpu-exec-common.c

@@ -19,7 +19,6 @@
 
 #include "qemu/osdep.h"
 #include "exec/log.h"
-#include "system/cpus.h"
 #include "system/tcg.h"
 #include "qemu/plugin.h"
 #include "internal-common.h"

accel/tcg/cpu-exec.c

@@ -33,7 +33,6 @@
 #include "qemu/rcu.h"
 #include "exec/log.h"
 #include "qemu/main-loop.h"
-#include "system/cpus.h"
 #include "exec/cpu-all.h"
 #include "system/cpu-timers.h"
 #include "exec/replay-core.h"

accel/tcg/monitor.c

@@ -13,7 +13,6 @@
 #include "qapi/type-helpers.h"
 #include "qapi/qapi-commands-machine.h"
 #include "monitor/monitor.h"
-#include "system/cpus.h"
 #include "system/cpu-timers.h"
 #include "system/tcg.h"
 #include "tcg/tcg.h"

accel/tcg/tcg-accel-ops.c

@@ -26,6 +26,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "system/accel-ops.h"
 #include "system/tcg.h"
 #include "system/replay.h"
 #include "system/cpu-timers.h"

accel/tcg/translate-all.c

@@ -54,7 +54,6 @@
 #include "qemu/cacheinfo.h"
 #include "qemu/timer.h"
 #include "exec/log.h"
-#include "system/cpus.h"
 #include "system/cpu-timers.h"
 #include "system/tcg.h"
 #include "qapi/error.h"

accel/xen/xen-all.c

@@ -18,6 +18,7 @@
 #include "hw/xen/xen_igd.h"
 #include "chardev/char.h"
 #include "qemu/accel.h"
+#include "system/accel-ops.h"
 #include "system/cpus.h"
 #include "system/xen.h"
 #include "system/runstate.h"

cpu-common.c

@@ -21,7 +21,6 @@
 #include "qemu/main-loop.h"
 #include "exec/cpu-common.h"
 #include "hw/core/cpu.h"
-#include "system/cpus.h"
 #include "qemu/lockable.h"
 #include "trace/trace-root.h"
 

cpu-target.c

@@ -35,6 +35,7 @@
 #include "exec/address-spaces.h"
 #include "exec/memory.h"
 #endif
+#include "system/accel-ops.h"
 #include "system/cpus.h"
 #include "system/tcg.h"
 #include "exec/tswap.h"

gdbstub/system.c

@@ -19,6 +19,7 @@
 #include "gdbstub/commands.h"
 #include "exec/hwaddr.h"
 #include "exec/tb-flush.h"
+#include "system/accel-ops.h"
 #include "system/cpus.h"
 #include "system/runstate.h"
 #include "system/replay.h"

include/qemu/typedefs.h

@@ -22,6 +22,7 @@
  * Please keep this list in case-insensitive alphabetical order.
  */
 typedef struct AccelCPUState AccelCPUState;
+typedef struct AccelOpsClass AccelOpsClass;
 typedef struct AccelState AccelState;
 typedef struct AddressSpace AddressSpace;
 typedef struct AioContext AioContext;

include/system/accel-ops.h

@@ -17,7 +17,6 @@
 #define TYPE_ACCEL_OPS "accel" ACCEL_OPS_SUFFIX
 #define ACCEL_OPS_NAME(name) (name "-" TYPE_ACCEL_OPS)
 
-typedef struct AccelOpsClass AccelOpsClass;
 DECLARE_CLASS_CHECKERS(AccelOpsClass, ACCEL_OPS, TYPE_ACCEL_OPS)
 
 /**

include/system/cpus.h

@@ -1,8 +1,6 @@
 #ifndef QEMU_CPUS_H
 #define QEMU_CPUS_H
 
-#include "system/accel-ops.h"
-
 /* register accel-specific operations */
 void cpus_register_accel(const AccelOpsClass *i);
 

system/cpus.c

@@ -31,6 +31,7 @@
 #include "qapi/qapi-events-run-state.h"
 #include "qapi/qmp/qerror.h"
 #include "exec/gdbstub.h"
+#include "system/accel-ops.h"
 #include "system/hw_accel.h"
 #include "exec/cpu-common.h"
 #include "qemu/thread.h"

target/i386/nvmm/nvmm-accel-ops.c

@@ -10,6 +10,7 @@
 #include "qemu/osdep.h"
 #include "system/kvm_int.h"
 #include "qemu/main-loop.h"
+#include "system/accel-ops.h"
 #include "system/cpus.h"
 #include "qemu/guest-random.h"
 

target/i386/whpx/whpx-accel-ops.c

@@ -11,6 +11,7 @@
 #include "qemu/osdep.h"
 #include "system/kvm_int.h"
 #include "qemu/main-loop.h"
+#include "system/accel-ops.h"
 #include "system/cpus.h"
 #include "qemu/guest-random.h"