cpus: prepare new CpusAccel cpu accelerator interface

The new interface starts unused, will start being used by the
next patches.

It provides methods for each accelerator to start a vcpu, kick a vcpu,
synchronize state, get cpu virtual clock and elapsed ticks.

In qemu_wait_io_event, make it clear that APC is used only for HAX
on Windows.

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

3 files changed, 47 insertions, 67 deletions

diff --git a/include/sysemu/cpu-timers.h b/include/sysemu/cpu-timers.h
index 7726e005cd..ed6ee5c46c 100644
--- a/include/sysemu/cpu-timers.h
+++ b/include/sysemu/cpu-timers.h
@@ -70,9 +70,8 @@ void cpu_enable_ticks(void);
 void cpu_disable_ticks(void);
 
 /*
- * return the time elapsed in VM between vm_start and vm_stop.  Unless
- * icount is active, cpu_get_ticks() uses units of the host CPU cycle
- * counter.
+ * return the time elapsed in VM between vm_start and vm_stop.
+ * cpu_get_ticks() uses units of the host CPU cycle counter.
  */
 int64_t cpu_get_ticks(void);
 
@@ -84,4 +83,8 @@ int64_t cpu_get_clock(void);
 
 void qemu_timer_notify_cb(void *opaque, QEMUClockType type);
 
+/* get the VIRTUAL clock and VM elapsed ticks via the cpus accel interface */
+int64_t cpus_get_virtual_clock(void);
+int64_t cpus_get_elapsed_ticks(void);
+
 #endif /* SYSEMU_CPU_TIMERS_H */
diff --git a/include/sysemu/cpus.h b/include/sysemu/cpus.h
index 149de000a0..26171697f5 100644
--- a/include/sysemu/cpus.h
+++ b/include/sysemu/cpus.h
@@ -4,7 +4,43 @@
 #include "qemu/timer.h"
 
 /* cpus.c */
+
+/* CPU execution threads */
+
+typedef struct CpusAccel {
+    void (*create_vcpu_thread)(CPUState *cpu); /* MANDATORY */
+    void (*kick_vcpu_thread)(CPUState *cpu);
+
+    void (*synchronize_post_reset)(CPUState *cpu);
+    void (*synchronize_post_init)(CPUState *cpu);
+    void (*synchronize_state)(CPUState *cpu);
+    void (*synchronize_pre_loadvm)(CPUState *cpu);
+
+    int64_t (*get_virtual_clock)(void);
+    int64_t (*get_elapsed_ticks)(void);
+} CpusAccel;
+
+/* register accel-specific cpus interface implementation */
+void cpus_register_accel(const CpusAccel *i);
+
+/* interface available for cpus accelerator threads */
+
+/* For temporary buffers for forming a name */
+#define VCPU_THREAD_NAME_SIZE 16
+
+void cpus_kick_thread(CPUState *cpu);
+bool cpu_work_list_empty(CPUState *cpu);
+bool cpu_thread_is_idle(CPUState *cpu);
 bool all_cpu_threads_idle(void);
+bool cpu_can_run(CPUState *cpu);
+void qemu_wait_io_event_common(CPUState *cpu);
+void qemu_wait_io_event(CPUState *cpu);
+void cpu_thread_signal_created(CPUState *cpu);
+void cpu_thread_signal_destroyed(CPUState *cpu);
+void cpu_handle_guest_debug(CPUState *cpu);
+
+/* end interface for cpus accelerator threads */
+
 bool qemu_in_vcpu_thread(void);
 void qemu_init_cpu_loop(void);
 void resume_all_vcpus(void);
diff --git a/include/sysemu/hw_accel.h b/include/sysemu/hw_accel.h
index e128f8b06b..ffed6192a3 100644
--- a/include/sysemu/hw_accel.h
+++ b/include/sysemu/hw_accel.h
@@ -1,5 +1,5 @@
 /*
- * QEMU Hardware accelertors support
+ * QEMU Hardware accelerators support
  *
  * Copyright 2016 Google, Inc.
  *
@@ -17,68 +17,9 @@
 #include "sysemu/hvf.h"
 #include "sysemu/whpx.h"
 
-static inline void cpu_synchronize_state(CPUState *cpu)
-{
-    if (kvm_enabled()) {
-        kvm_cpu_synchronize_state(cpu);
-    }
-    if (hax_enabled()) {
-        hax_cpu_synchronize_state(cpu);
-    }
-    if (hvf_enabled()) {
-        hvf_cpu_synchronize_state(cpu);
-    }
-    if (whpx_enabled()) {
-        whpx_cpu_synchronize_state(cpu);
-    }
-}
-
-static inline void cpu_synchronize_post_reset(CPUState *cpu)
-{
-    if (kvm_enabled()) {
-        kvm_cpu_synchronize_post_reset(cpu);
-    }
-    if (hax_enabled()) {
-        hax_cpu_synchronize_post_reset(cpu);
-    }
-    if (hvf_enabled()) {
-        hvf_cpu_synchronize_post_reset(cpu);
-    }
-    if (whpx_enabled()) {
-        whpx_cpu_synchronize_post_reset(cpu);
-    }
-}
-
-static inline void cpu_synchronize_post_init(CPUState *cpu)
-{
-    if (kvm_enabled()) {
-        kvm_cpu_synchronize_post_init(cpu);
-    }
-    if (hax_enabled()) {
-        hax_cpu_synchronize_post_init(cpu);
-    }
-    if (hvf_enabled()) {
-        hvf_cpu_synchronize_post_init(cpu);
-    }
-    if (whpx_enabled()) {
-        whpx_cpu_synchronize_post_init(cpu);
-    }
-}
-
-static inline void cpu_synchronize_pre_loadvm(CPUState *cpu)
-{
-    if (kvm_enabled()) {
-        kvm_cpu_synchronize_pre_loadvm(cpu);
-    }
-    if (hax_enabled()) {
-        hax_cpu_synchronize_pre_loadvm(cpu);
-    }
-    if (hvf_enabled()) {
-        hvf_cpu_synchronize_pre_loadvm(cpu);
-    }
-    if (whpx_enabled()) {
-        whpx_cpu_synchronize_pre_loadvm(cpu);
-    }
-}
+void cpu_synchronize_state(CPUState *cpu);
+void cpu_synchronize_post_reset(CPUState *cpu);
+void cpu_synchronize_post_init(CPUState *cpu);
+void cpu_synchronize_pre_loadvm(CPUState *cpu);
 
 #endif /* QEMU_HW_ACCEL_H */