qemu/hw/input/trace-events
Alexander Graf 2222e0a633 input: Add trace event for empty keyboard queue
When driving QEMU from the outside, we have basically no chance to
determine how quickly the guest OS picks up key events, so we usually
have to limit ourselves to very slow keyboard presses to make sure
the guest always has enough chance to pick them up.

This patch adds a trace events when the keyboarde queue is drained.
An external driver can use that as hint that new keys can be pressed.

Signed-off-by: Alexander Graf <agraf@suse.de>
Message-id: 1490883775-94658-1-git-send-email-agraf@suse.de
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2017-05-03 14:20:12 +02:00

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# See docs/tracing.txt for syntax documentation.
# hw/input/ps2.c
ps2_put_keycode(void *opaque, int keycode) "%p keycode %d"
ps2_read_data(void *opaque) "%p"
ps2_set_ledstate(void *s, int ledstate) "%p ledstate %d"
ps2_reset_keyboard(void *s) "%p"
ps2_write_keyboard(void *opaque, int val) "%p val %d"
ps2_keyboard_set_translation(void *opaque, int mode) "%p mode %d"
ps2_mouse_send_packet(void *s, int dx1, int dy1, int dz1, int b) "%p x %d y %d z %d bs %#x"
ps2_mouse_fake_event(void *opaque) "%p"
ps2_write_mouse(void *opaque, int val) "%p val %d"
ps2_kbd_reset(void *opaque) "%p"
ps2_mouse_reset(void *opaque) "%p"
ps2_kbd_init(void *s) "%p"
ps2_mouse_init(void *s) "%p"
# hw/input/milkymist-softusb.c
milkymist_softusb_memory_read(uint32_t addr, uint32_t value) "addr %08x value %08x"
milkymist_softusb_memory_write(uint32_t addr, uint32_t value) "addr %08x value %08x"
milkymist_softusb_mevt(uint8_t m) "m %d"
milkymist_softusb_kevt(uint8_t m) "m %d"
milkymist_softusb_pulse_irq(void) "Pulse IRQ"
# hw/input/hid.c
hid_kbd_queue_full(void) "queue full"
hid_kbd_queue_empty(void) "queue empty"
# hw/input/virtio
virtio_input_queue_full(void) "queue full"