Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 meson.build                   | 1 +
 accel/split/trace.h           | 2 ++
 accel/split/split-accel-ops.c | 7 +++++++
 accel/split/trace-events      | 9 +++++++++
 4 files changed, 19 insertions(+)
 create mode 100644 accel/split/trace.h
 create mode 100644 accel/split/trace-events

diff --git a/meson.build b/meson.build
index 5004678a26b..06c32e0e958 100644
--- a/meson.build
+++ b/meson.build
@@ -3635,6 +3635,7 @@ if have_system
   trace_events_subdirs += [
     'accel/hvf',
     'accel/kvm',
+    'accel/split',
     'audio',
     'backends',
     'backends/tpm',
diff --git a/accel/split/trace.h b/accel/split/trace.h
new file mode 100644
index 00000000000..46b45388930
--- /dev/null
+++ b/accel/split/trace.h
@@ -0,0 +1,2 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#include "trace/trace-accel_split.h"
diff --git a/accel/split/split-accel-ops.c b/accel/split/split-accel-ops.c
index 1766834d537..399bf71a9ec 100644
--- a/accel/split/split-accel-ops.c
+++ b/accel/split/split-accel-ops.c
@@ -17,6 +17,7 @@
 #include "system/hw_accel.h"
 #include "system/tcg.h"
 #include "split-accel.h"
+#include "trace.h"
 
 #include "accel/accel-internal.h"
 #include "accel/tcg/tcg-accel-ops-mttcg.h"
@@ -64,13 +65,18 @@ static void *split_cpu_thread_routine(void *arg)
         if (cpu_can_run(cpu)) {
             if (acs->use_hw) {
                 r = hwops->exec_vcpu_thread(cpu);
+                trace_accel_split_exec_vcpu_thread_hw(r);
             } else {
                 r = swops->exec_vcpu_thread(cpu);
+                trace_accel_split_exec_vcpu_thread_sw(r);
             }
             switch (r) {
             case 0:
                 if (acs->use_hw) {
                     acs->use_hw = cpu_acceleratable(cpu);
+                    if (!acs->use_hw) {
+                        trace_accel_split_sw_emulate();
+                    }
                 }
                 break;
             case EXCP_INTERRUPT:
@@ -95,6 +101,7 @@ static void *split_cpu_thread_routine(void *arg)
                 break;
             case EXCP_HWACCEL:
                 assert(!acs->use_hw);
+                trace_accel_split_hw_accelerate();
                 acs->use_hw = true;
                 break;
             default:
diff --git a/accel/split/trace-events b/accel/split/trace-events
new file mode 100644
index 00000000000..c0b9fd97d1d
--- /dev/null
+++ b/accel/split/trace-events
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# See docs/devel/tracing.rst for syntax documentation.
+
+# split-accel-ops.c
+accel_split_exec_vcpu_thread_sw(int retval) "sw: rv:0x%x"
+accel_split_exec_vcpu_thread_hw(int retval) "hw: rv:0x%x"
+accel_split_hw_accelerate(void) ""
+accel_split_sw_emulate(void) ""
-- 
2.49.0