KVM: convert custom marker based tracing to event traces

This allows use of the powerful ftrace infrastructure.

See Documentation/trace/ for usage information.

[avi, stephen: various build fixes]
[sheng: fix control register breakage]

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

2 files changed, 9 insertions, 0 deletions

diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index bb8a1b5e41c1..94759ed96b64 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -20,6 +20,7 @@
  */
 
 #include <linux/kvm_host.h>
+#include <trace/events/kvm.h>
 
 #include <asm/msidef.h>
 #ifdef CONFIG_IA64
@@ -125,6 +126,8 @@ int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
         unsigned long *irq_state, sig_level;
         int ret = -1;
 
+        trace_kvm_set_irq(irq);
+
         WARN_ON(!mutex_is_locked(&kvm->irq_lock));
 
         if (irq < KVM_IOAPIC_NUM_PINS) {
@@ -161,6 +164,8 @@ void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
         struct hlist_node *n;
         unsigned gsi = pin;
 
+        trace_kvm_ack_irq(irqchip, pin);
+
         list_for_each_entry(e, &kvm->irq_routing, link)
                 if (e->type == KVM_IRQ_ROUTING_IRQCHIP &&
                     e->irqchip.irqchip == irqchip &&
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 48d5e697bf44..04bdeddebdac 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -59,6 +59,9 @@
 #include "irq.h"
 #endif
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/kvm.h>
+
 MODULE_AUTHOR("Qumranet");
 MODULE_LICENSE("GPL");
 
@@ -2718,6 +2721,7 @@ EXPORT_SYMBOL_GPL(kvm_init);
 void kvm_exit(void)
 {
         kvm_trace_cleanup();
+        tracepoint_synchronize_unregister();
         misc_deregister(&kvm_dev);
         kmem_cache_destroy(kvm_vcpu_cache);
         sysdev_unregister(&kvm_sysdev);