[RFC PATCH-for-6.1 1/9] hw/core/clock: Increase clock propagation trace events verbosity

[Philippe Mathieu-Daudé]

Move the 'clock_propagate' trace event to clock_propagate_period()
to display the recursive propagation, and add 'propagate_children'
event to closely look at the clock propagation for each children
in the clock tree.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/core/clock.c      | 8 +++++++-
 hw/core/trace-events | 3 ++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/hw/core/clock.c b/hw/core/clock.c
index fc5a99683f8..a42dc3c3d29 100644
--- a/hw/core/clock.c
+++ b/hw/core/clock.c
@@ -79,7 +79,14 @@ static void clock_propagate_period(Clock *clk, bool 
call_callbacks)
 {
     Clock *child;
 
+    trace_clock_propagate(CLOCK_PATH(clk),
+                          CLOCK_PERIOD_TO_HZ(clk->period),
+                          call_callbacks);
     QLIST_FOREACH(child, &clk->children, sibling) {
+        trace_clock_propagate_children(CLOCK_PATH(clk),
+                                       CLOCK_PERIOD_TO_HZ(clk->period),
+                                       CLOCK_PATH(child),
+                                       CLOCK_PERIOD_TO_HZ(child->period));
         if (child->period != clk->period) {
             if (call_callbacks) {
                 clock_call_callback(child, ClockPreUpdate);
@@ -99,7 +106,6 @@ static void clock_propagate_period(Clock *clk, bool 
call_callbacks)
 void clock_propagate(Clock *clk)
 {
     assert(clk->source == NULL);
-    trace_clock_propagate(CLOCK_PATH(clk));
     clock_propagate_period(clk, true);
 }
 
diff --git a/hw/core/trace-events b/hw/core/trace-events
index 360ddeb2c87..22df6789918 100644
--- a/hw/core/trace-events
+++ b/hw/core/trace-events
@@ -32,5 +32,6 @@ resettable_transitional_function(void *obj, const char 
*objtype) "obj=%p(%s)"
 clock_set_source(const char *clk, const char *src) "'%s', src='%s'"
 clock_disconnect(const char *clk) "'%s'"
 clock_set(const char *clk, uint64_t old, uint64_t new) "'%s', 
%"PRIu64"Hz->%"PRIu64"Hz"
-clock_propagate(const char *clk) "'%s'"
+clock_propagate(const char *src, uint64_t src_hz, int cb) "src='%s' 
val=%"PRIu64"Hz cb=%d"
+clock_propagate_children(const char *src, uint64_t src_hz, const char *clk, 
uint64_t clk_hz) "src='%s'@%"PRIu64"Hz -> clk='%s'@%"PRIu64"Hz"
 clock_update(const char *clk, const char *src, uint64_t hz, int cb) "'%s', 
src='%s', val=%"PRIu64"Hz cb=%d"
-- 
2.26.3