[PATCH v5 02/10] trace-events: remove the remaining vcpu trace events

From: "Alex Bennée" <alex.bennee@linaro.org>
To: Stefan Hajnoczi <stefanha@redhat.com>, qemu-devel@nongnu.org
Cc: "Kyle Evans" <kevans@freebsd.org>,
	libvir-list@redhat.com,
	"Philippe Mathieu-Daudé" <philmd@linaro.org>,
	"Greg Kurz" <groug@kaod.org>, "Eric Blake" <eblake@redhat.com>,
	"Markus Armbruster" <armbru@redhat.com>,
	"Warner Losh" <imp@bsdimp.com>,
	"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
	"Eduardo Habkost" <eduardo@habkost.net>,
	"Michael Roth" <michael.roth@amd.com>,
	"Richard Henderson" <richard.henderson@linaro.org>,
	"Christian Schoenebeck" <qemu_oss@crudebyte.com>,
	"Riku Voipio" <riku.voipio@iki.fi>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Yanan Wang" <wangyanan55@huawei.com>,
	"Alex Bennée" <alex.bennee@linaro.org>
Subject: [PATCH v5 02/10] trace-events: remove the remaining vcpu trace events
Date: Wed, 24 May 2023 14:39:44 +0100	[thread overview]
Message-ID: <20230524133952.3971948-3-alex.bennee@linaro.org> (raw)
In-Reply-To: <20230524133952.3971948-1-alex.bennee@linaro.org>

While these are all in helper functions being designated vcpu events
complicates the removal of the dynamic vcpu state code. TCG plugins
allow you to instrument vcpu_[init|exit|idle].

We rename cpu_reset and make it a normal trace point.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230523125000.3674739-3-alex.bennee@linaro.org>
---
 hw/core/cpu-common.c   |  4 ++--
 trace/control-target.c |  1 -
 trace/control.c        |  2 --
 hw/core/trace-events   |  3 +++
 trace-events           | 31 -------------------------------
 5 files changed, 5 insertions(+), 36 deletions(-)

diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c
index 5ccc3837b6..951477a7fd 100644
--- a/hw/core/cpu-common.c
+++ b/hw/core/cpu-common.c
@@ -32,7 +32,7 @@
 #include "sysemu/tcg.h"
 #include "hw/boards.h"
 #include "hw/qdev-properties.h"
-#include "trace/trace-root.h"
+#include "trace.h"
 #include "qemu/plugin.h"
 
 CPUState *cpu_by_arch_id(int64_t id)
@@ -113,7 +113,7 @@ void cpu_reset(CPUState *cpu)
 {
     device_cold_reset(DEVICE(cpu));
 
-    trace_guest_cpu_reset(cpu);
+    trace_cpu_reset(cpu->cpu_index);
 }
 
 static void cpu_common_reset_hold(Object *obj)
diff --git a/trace/control-target.c b/trace/control-target.c
index c0c1e2310a..a10752924b 100644
--- a/trace/control-target.c
+++ b/trace/control-target.c
@@ -144,5 +144,4 @@ void trace_init_vcpu(CPUState *vcpu)
             }
         }
     }
-    trace_guest_cpu_enter(vcpu);
 }
diff --git a/trace/control.c b/trace/control.c
index 6c77cc6318..d24af91004 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -277,8 +277,6 @@ void trace_fini_vcpu(CPUState *vcpu)
     TraceEventIter iter;
     TraceEvent *ev;
 
-    trace_guest_cpu_exit(vcpu);
-
     trace_event_iter_init_all(&iter);
     while ((ev = trace_event_iter_next(&iter)) != NULL) {
         if (trace_event_is_vcpu(ev) &&
diff --git a/hw/core/trace-events b/hw/core/trace-events
index 56da55bd71..2cf085ac66 100644
--- a/hw/core/trace-events
+++ b/hw/core/trace-events
@@ -29,3 +29,6 @@ clock_set(const char *clk, uint64_t old, uint64_t new) "'%s', %"PRIu64"Hz->%"PRI
 clock_propagate(const char *clk) "'%s'"
 clock_update(const char *clk, const char *src, uint64_t hz, int cb) "'%s', src='%s', val=%"PRIu64"Hz cb=%d"
 clock_set_mul_div(const char *clk, uint32_t oldmul, uint32_t mul, uint32_t olddiv, uint32_t div) "'%s', mul: %u -> %u, div: %u -> %u"
+
+# cpu-common.c
+cpu_reset(int cpu_index) "%d"
diff --git a/trace-events b/trace-events
index 691c3533e4..dd318ed1af 100644
--- a/trace-events
+++ b/trace-events
@@ -54,34 +54,3 @@ qmp_job_resume(void *job) "job %p"
 qmp_job_complete(void *job) "job %p"
 qmp_job_finalize(void *job) "job %p"
 qmp_job_dismiss(void *job) "job %p"
-
-
-### Guest events, keep at bottom
-
-
-## vCPU
-
-# trace/control-target.c
-
-# Hot-plug a new virtual (guest) CPU
-#
-# Mode: user, softmmu
-# Targets: all
-vcpu guest_cpu_enter(void)
-
-# trace/control.c
-
-# Hot-unplug a virtual (guest) CPU
-#
-# Mode: user, softmmu
-# Targets: all
-vcpu guest_cpu_exit(void)
-
-# hw/core/cpu.c
-
-# Reset the state of a virtual (guest) CPU
-#
-# Mode: user, softmmu
-# Targets: all
-vcpu guest_cpu_reset(void)
-
-- 
2.39.2


