[PATCH v5 63/69] accel: Always register AccelOpsClass::get_elapsed_ticks() handler

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

In order to dispatch over AccelOpsClass::get_elapsed_ticks(),
we need it always defined, not calling a hidden handler under
the hood. Make AccelOpsClass::get_elapsed_ticks() mandatory.
Register the default cpu_get_ticks() for each accelerator.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
---
 include/system/accel-ops.h        | 1 +
 accel/hvf/hvf-accel-ops.c         | 2 ++
 accel/kvm/kvm-accel-ops.c         | 3 +++
 accel/qtest/qtest.c               | 2 ++
 accel/tcg/tcg-accel-ops.c         | 3 +++
 accel/xen/xen-all.c               | 2 ++
 system/cpus.c                     | 6 ++----
 target/i386/nvmm/nvmm-accel-ops.c | 3 +++
 target/i386/whpx/whpx-accel-ops.c | 3 +++
 9 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/include/system/accel-ops.h b/include/system/accel-ops.h
index e1e6985a27c..8683cd37716 100644
--- a/include/system/accel-ops.h
+++ b/include/system/accel-ops.h
@@ -86,6 +86,7 @@ struct AccelOpsClass {
     int64_t (*get_virtual_clock)(void);
     void (*set_virtual_clock)(int64_t time);
 
+    /* get_elapsed_ticks is mandatory. */
     int64_t (*get_elapsed_ticks)(void);
 
     /* gdbstub hooks */
diff --git a/accel/hvf/hvf-accel-ops.c b/accel/hvf/hvf-accel-ops.c
index 420630773c8..17776e700eb 100644
--- a/accel/hvf/hvf-accel-ops.c
+++ b/accel/hvf/hvf-accel-ops.c
@@ -54,6 +54,7 @@
 #include "gdbstub/enums.h"
 #include "exec/cpu-common.h"
 #include "system/accel-ops.h"
+#include "system/cpu-timers.h"
 #include "system/cpus.h"
 #include "system/hvf.h"
 #include "system/hvf_int.h"
@@ -367,6 +368,7 @@ static void hvf_accel_ops_class_init(ObjectClass *oc, const void *data)
     ops->remove_all_breakpoints = hvf_remove_all_breakpoints;
     ops->update_guest_debug = hvf_update_guest_debug;
 
+    ops->get_elapsed_ticks = cpu_get_ticks;
     ops->get_vcpu_stats = hvf_get_vcpu_stats;
 };
 
diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c
index a4bcaa87c8d..f27228d4cd9 100644
--- a/accel/kvm/kvm-accel-ops.c
+++ b/accel/kvm/kvm-accel-ops.c
@@ -17,6 +17,7 @@
 #include "qemu/error-report.h"
 #include "qemu/main-loop.h"
 #include "system/accel-ops.h"
+#include "system/cpu-timers.h"
 #include "system/kvm.h"
 #include "system/kvm_int.h"
 #include "system/runstate.h"
@@ -94,6 +95,8 @@ static void kvm_accel_ops_class_init(ObjectClass *oc, const void *data)
     ops->remove_breakpoint = kvm_remove_breakpoint;
     ops->remove_all_breakpoints = kvm_remove_all_breakpoints;
 #endif
+
+    ops->get_elapsed_ticks = cpu_get_ticks;
 }
 
 static const TypeInfo kvm_accel_ops_type = {
diff --git a/accel/qtest/qtest.c b/accel/qtest/qtest.c
index 8e2379d6e37..b019cf69412 100644
--- a/accel/qtest/qtest.c
+++ b/accel/qtest/qtest.c
@@ -20,6 +20,7 @@
 #include "qemu/accel.h"
 #include "system/accel-ops.h"
 #include "system/qtest.h"
+#include "system/cpu-timers.h"
 #include "system/cpus.h"
 #include "qemu/guest-random.h"
 #include "qemu/main-loop.h"
@@ -67,6 +68,7 @@ static void qtest_accel_ops_class_init(ObjectClass *oc, const void *data)
     ops->thread_precreate = dummy_thread_precreate;
     ops->cpu_thread_routine = dummy_cpu_thread_routine;
     ops->kick_vcpu_thread = cpus_kick_thread;
+    ops->get_elapsed_ticks = cpu_get_ticks;
     ops->get_virtual_clock = qtest_get_virtual_clock;
     ops->set_virtual_clock = qtest_set_virtual_clock;
     ops->handle_interrupt = generic_handle_interrupt;
diff --git a/accel/tcg/tcg-accel-ops.c b/accel/tcg/tcg-accel-ops.c
index a8c24cf8a4c..f22f5d73abe 100644
--- a/accel/tcg/tcg-accel-ops.c
+++ b/accel/tcg/tcg-accel-ops.c
@@ -27,6 +27,7 @@
 
 #include "qemu/osdep.h"
 #include "system/accel-ops.h"
+#include "system/cpu-timers.h"
 #include "system/tcg.h"
 #include "system/replay.h"
 #include "exec/icount.h"
@@ -205,6 +206,7 @@ static void tcg_accel_ops_init(AccelClass *ac)
         ops->cpu_thread_routine = mttcg_cpu_thread_routine;
         ops->kick_vcpu_thread = mttcg_kick_vcpu_thread;
         ops->handle_interrupt = tcg_handle_interrupt;
+        ops->get_elapsed_ticks = cpu_get_ticks;
     } else {
         ops->create_vcpu_thread = rr_start_vcpu_thread;
         ops->kick_vcpu_thread = rr_kick_vcpu_thread;
@@ -215,6 +217,7 @@ static void tcg_accel_ops_init(AccelClass *ac)
             ops->get_elapsed_ticks = icount_get;
         } else {
             ops->handle_interrupt = tcg_handle_interrupt;
+            ops->get_elapsed_ticks = cpu_get_ticks;
         }
     }
 
diff --git a/accel/xen/xen-all.c b/accel/xen/xen-all.c
index 18ae0d82db5..48d458bc4c7 100644
--- a/accel/xen/xen-all.c
+++ b/accel/xen/xen-all.c
@@ -20,6 +20,7 @@
 #include "qemu/accel.h"
 #include "accel/dummy-cpus.h"
 #include "system/accel-ops.h"
+#include "system/cpu-timers.h"
 #include "system/cpus.h"
 #include "system/xen.h"
 #include "system/runstate.h"
@@ -156,6 +157,7 @@ static void xen_accel_ops_class_init(ObjectClass *oc, const void *data)
     ops->cpu_thread_routine = dummy_cpu_thread_routine;
     ops->kick_vcpu_thread = cpus_kick_thread;
     ops->handle_interrupt = generic_handle_interrupt;
+    ops->get_elapsed_ticks = cpu_get_ticks;
 }
 
 static const TypeInfo xen_accel_ops_type = {
diff --git a/system/cpus.c b/system/cpus.c
index 6c64ffccbb3..d32b89ecf7b 100644
--- a/system/cpus.c
+++ b/system/cpus.c
@@ -240,10 +240,7 @@ void cpus_set_virtual_clock(int64_t new_time)
  */
 int64_t cpus_get_elapsed_ticks(void)
 {
-    if (cpus_accel->get_elapsed_ticks) {
-        return cpus_accel->get_elapsed_ticks();
-    }
-    return cpu_get_ticks();
+    return cpus_accel->get_elapsed_ticks();
 }
 
 void generic_handle_interrupt(CPUState *cpu, int old_mask, int new_mask)
@@ -668,6 +665,7 @@ void cpus_register_accel(const AccelOpsClass *ops)
     assert(ops->create_vcpu_thread || ops->cpu_thread_routine);
     assert(ops->kick_vcpu_thread);
     assert(ops->handle_interrupt);
+    assert(ops->get_elapsed_ticks);
     cpus_accel = ops;
 }
 
diff --git a/target/i386/nvmm/nvmm-accel-ops.c b/target/i386/nvmm/nvmm-accel-ops.c
index d568cc737b1..4deff57471c 100644
--- a/target/i386/nvmm/nvmm-accel-ops.c
+++ b/target/i386/nvmm/nvmm-accel-ops.c
@@ -11,6 +11,7 @@
 #include "system/kvm_int.h"
 #include "qemu/main-loop.h"
 #include "system/accel-ops.h"
+#include "system/cpu-timers.h"
 #include "system/cpus.h"
 #include "qemu/guest-random.h"
 
@@ -83,6 +84,8 @@ static void nvmm_accel_ops_class_init(ObjectClass *oc, const void *data)
     ops->synchronize_post_init = nvmm_cpu_synchronize_post_init;
     ops->synchronize_state = nvmm_cpu_synchronize_state;
     ops->synchronize_pre_loadvm = nvmm_cpu_synchronize_pre_loadvm;
+
+    ops->get_elapsed_ticks = cpu_get_ticks;
 }
 
 static const TypeInfo nvmm_accel_ops_type = {
diff --git a/target/i386/whpx/whpx-accel-ops.c b/target/i386/whpx/whpx-accel-ops.c
index fbffd952ac4..f47033a502c 100644
--- a/target/i386/whpx/whpx-accel-ops.c
+++ b/target/i386/whpx/whpx-accel-ops.c
@@ -12,6 +12,7 @@
 #include "system/kvm_int.h"
 #include "qemu/main-loop.h"
 #include "system/accel-ops.h"
+#include "system/cpu-timers.h"
 #include "system/cpus.h"
 #include "qemu/guest-random.h"
 
@@ -86,6 +87,8 @@ static void whpx_accel_ops_class_init(ObjectClass *oc, const void *data)
     ops->synchronize_post_init = whpx_cpu_synchronize_post_init;
     ops->synchronize_state = whpx_cpu_synchronize_state;
     ops->synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm;
+
+    ops->get_elapsed_ticks = cpu_get_ticks;
 }
 
 static const TypeInfo whpx_accel_ops_type = {
-- 
2.49.0