linux-kernel - [RFC][PATCH v1 08/15] perf: export tracepoint events via sysfs: kvm and kvm

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Message-ID: <1279797268.20942.89.camel@minggr.sh.intel.com>
Date:	Thu, 22 Jul 2010 19:14:28 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Ingo Molnar <mingo@...e.hu>, Avi Kivity <avi@...hat.com>
Cc:	Robert Richter <robert.richter@....com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Johannes Berg <johannes@...solutions.net>,
	Peter Zijlstra <peterz@...radead.org>,
	Greg KH <greg@...ah.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Paul Mundt <lethal@...ux-sh.org>,
	"eranian@...il.com" <eranian@...il.com>,
	"Gary.Mohr@...l.com" <Gary.Mohr@...l.com>,
	"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
	"Zhang, Yanmin" <yanmin_zhang@...ux.intel.com>,
	Paul Mackerras <paulus@...ba.org>,
	"David S. Miller" <davem@...emloft.net>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Will Deacon <will.deacon@....com>,
	Maynard Johnson <mpjohn@...ibm.com>,
	Carl Love <carll@...ibm.com>,
	Kay Sievers <kay.sievers@...y.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: [RFC][PATCH v1 08/15] perf: export tracepoint events via sysfs:
 kvm and kvm_mmu

kvm and kvm_mmu tracepoint events are exported like below,

/sys/devices/system/kvm/kvm0/events/
|-- kvm_ack_irq
|   |-- config
|   `-- type
....
....
|-- kvm_mmu_get_page
|   |-- config
|   `-- type
....
....
---
 virt/kvm/kvm_main.c |   15 +++++++++++++++
 1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index f032806..0acb4f6 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -46,6 +46,7 @@
 #include <linux/srcu.h>
 #include <linux/hugetlb.h>
 #include <linux/slab.h>
+#include <linux/perf_event.h>
 
 #include <asm/processor.h>
 #include <asm/io.h>
@@ -2178,6 +2179,18 @@ static void kvm_sched_out(struct preempt_notifier *pn,
 	kvm_arch_vcpu_put(vcpu);
 }
 
+static void kvm_sys_add_tp(struct kobject *kvm_kobj)
+{
+	struct kobject *events_kobj;
+
+	events_kobj = perf_sys_create_events_dir(kvm_kobj);
+	if (!events_kobj)
+		return;
+
+	perf_sys_add_tp_events(events_kobj, "kvm");
+	perf_sys_add_tp_events(events_kobj, "kvm_mmu");
+}
+
 int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 		  struct module *module)
 {
@@ -2227,6 +2240,8 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
 	if (r)
 		goto out_free_4;
 
+	kvm_sys_add_tp(&kvm_sysdev.kobj);
+
 	/* A kmem cache lets us meet the alignment requirements of fx_save. */
 	if (!vcpu_align)
 		vcpu_align = __alignof__(struct kvm_vcpu);



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