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virtio-serial-bus: Add trace events

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Add some trace events for messages passed between the guest and host.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Amit Shah 2011-07-05 16:36:39 +05:30
parent 89b9ba661b
commit 49e3fdd7f2
2 changed files with 13 additions and 0 deletions
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7
hw/virtio-serial-bus.c
View File

@ -19,6 +19,7 @@
#include "monitor.h"
#include "qemu-queue.h"
#include "sysbus.h"
#include "trace.h"
#include "virtio-serial.h"
/* The virtio-serial bus on top of which the ports will ride as devices */
@ -221,6 +222,7 @@ static size_t send_control_event(VirtIOSerialPort *port, uint16_t event,
stw_p(&cpkt.event, event);
stw_p(&cpkt.value, value);
trace_virtio_serial_send_control_event(port->id, event, value);
return send_control_msg(port, &cpkt, sizeof(cpkt));
}
@ -302,6 +304,7 @@ void virtio_serial_throttle_port(VirtIOSerialPort *port, bool throttle)
return;
}
trace_virtio_serial_throttle_port(port->id, throttle);
port->throttled = throttle;
if (throttle) {
return;
@ -328,6 +331,8 @@ static void handle_control_message(VirtIOSerial *vser, void *buf, size_t len)
cpkt.event = lduw_p(&gcpkt->event);
cpkt.value = lduw_p(&gcpkt->value);
trace_virtio_serial_handle_control_message(cpkt.event, cpkt.value);
if (cpkt.event == VIRTIO_CONSOLE_DEVICE_READY) {
if (!cpkt.value) {
error_report("virtio-serial-bus: Guest failure in adding device %s",
@ -351,6 +356,8 @@ static void handle_control_message(VirtIOSerial *vser, void *buf, size_t len)
return;
}
trace_virtio_serial_handle_control_message_port(port->id);
info = DO_UPCAST(VirtIOSerialPortInfo, qdev, port->dev.info);
switch(cpkt.event) {

6
trace-events
View File

@ -46,6 +46,12 @@ disable virtio_queue_notify(void *vdev, int n, void *vq) "vdev %p n %d vq %p"
disable virtio_irq(void *vq) "vq %p"
disable virtio_notify(void *vdev, void *vq) "vdev %p vq %p"
# hw/virtio-serial-bus.c
disable virtio_serial_send_control_event(unsigned int port, uint16_t event, uint16_t value) "port %u, event %u, value %u"
disable virtio_serial_throttle_port(unsigned int port, bool throttle) "port %u, throttle %d"
disable virtio_serial_handle_control_message(uint16_t event, uint16_t value) "event %u, value %u"
disable virtio_serial_handle_control_message_port(unsigned int port) "port %u"
# block.c
disable multiwrite_cb(void *mcb, int ret) "mcb %p ret %d"
disable bdrv_aio_multiwrite(void *mcb, int num_callbacks, int num_reqs) "mcb %p num_callbacks %d num_reqs %d"