KVM: s390: count vcpu wakeups in stat.halt_wakeup

This patch introduces the halt_wakeup counter used by common code and uses it to
count vcpu wakeups done in s390 arch specific code.

Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

3 files changed, 3 insertions, 0 deletions

diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
index 1a6f6fd8bd34..2175f911a73a 100644
--- a/arch/s390/include/asm/kvm_host.h
+++ b/arch/s390/include/asm/kvm_host.h
@@ -192,6 +192,7 @@ struct kvm_vcpu_stat {
         u32 exit_stop_request;
         u32 exit_validity;
         u32 exit_instruction;
+        u32 halt_wakeup;
         u32 instruction_lctl;
         u32 instruction_lctlg;
         u32 instruction_stctl;
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 4cad00adef93..a39838457f01 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -626,6 +626,7 @@ void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
                  */
                 vcpu->preempted = true;
                 wake_up_interruptible(&vcpu->wq);
+                vcpu->stat.halt_wakeup++;
         }
 }
 
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 0d5aa88e238b..55aade49b6d1 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -50,6 +50,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
         { "exit_instruction", VCPU_STAT(exit_instruction) },
         { "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
         { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
+        { "halt_wakeup", VCPU_STAT(halt_wakeup) },
         { "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
         { "instruction_lctl", VCPU_STAT(instruction_lctl) },
         { "instruction_stctl", VCPU_STAT(instruction_stctl) },