s390x/kvm: add tracepoint to ioeventfd interface

Trace when assigning/unassigning.

Message-Id: <20190212153025.25425-1-cohuck@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index 15fdc168e1c53e851ce3db0067325a763fa7ebc9..19530fb94e5af0c58c3636ad91c5bf53ce79f59d 100644 (file)
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -1886,6 +1886,8 @@ int kvm_s390_assign_subch_ioeventfd(EventNotifier *notifier, uint32_t sch,
         .addr = sch,
         .len = 8,
     };
+    trace_kvm_assign_subch_ioeventfd(kick.fd, kick.addr, assign,
+                                     kick.datamatch);
     if (!kvm_check_extension(kvm_state, KVM_CAP_IOEVENTFD)) {
         return -ENOSYS;
     }

diff --git a/target/s390x/trace-events b/target/s390x/trace-events
index a84e316e49376c6287f2c5c8c0244741b9fa9fe5..e509b08799c6b01b8291736609f5613af465bb9f 100644 (file)
--- a/target/s390x/trace-events
+++ b/target/s390x/trace-events
@@ -14,6 +14,7 @@ ioinst_chsc_cmd(uint16_t cmd, uint16_t len) "IOINST: chsc command 0x%04x, len 0x
 kvm_enable_cmma(int rc) "CMMA: enabling with result code %d"
 kvm_clear_cmma(int rc) "CMMA: clearing with result code %d"
 kvm_failed_cpu_state_set(int cpu_index, uint8_t state, const char *msg) "Warning: Unable to set cpu %d state %" PRIu8 " to KVM: %s"
+kvm_assign_subch_ioeventfd(int fd, uint32_t addr, bool assign, int datamatch) "fd: %d sch: @0x%x assign: %d vq: %d"
 
 # target/s390x/cpu.c
 cpu_set_state(int cpu_index, uint8_t state) "setting cpu %d state to %" PRIu8