0e7d8eea2f
v2.9.0 (final) based qemu package set. OBS-URL: https://build.opensuse.org/request/show/489656 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=336
49 lines
1.7 KiB
Diff
49 lines
1.7 KiB
Diff
From 3ec21f24be4c96c2ea5cdae8548a2222b984961a Mon Sep 17 00:00:00 2001
|
|
From: Alexander Graf <agraf@suse.de>
|
|
Date: Thu, 30 Mar 2017 15:32:08 +0200
|
|
Subject: [PATCH] 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>
|
|
[BR: BSC#1031692]
|
|
Signed-off-by: Bruce Rogers <brogers@suse.com>
|
|
---
|
|
hw/input/hid.c | 4 ++++
|
|
hw/input/trace-events | 1 +
|
|
2 files changed, 5 insertions(+)
|
|
|
|
diff --git a/hw/input/hid.c b/hw/input/hid.c
|
|
index fa9cc4c616..93887ecc43 100644
|
|
--- a/hw/input/hid.c
|
|
+++ b/hw/input/hid.c
|
|
@@ -256,6 +256,10 @@ static void hid_keyboard_process_keycode(HIDState *hs)
|
|
slot = hs->head & QUEUE_MASK; QUEUE_INCR(hs->head); hs->n--;
|
|
keycode = hs->kbd.keycodes[slot];
|
|
|
|
+ if (!hs->n) {
|
|
+ trace_hid_kbd_queue_empty();
|
|
+ }
|
|
+
|
|
key = keycode & 0x7f;
|
|
index = key | ((hs->kbd.modifiers & (1 << 8)) >> 1);
|
|
hid_code = hid_usage_keys[index];
|
|
diff --git a/hw/input/trace-events b/hw/input/trace-events
|
|
index f3bfbede5c..5a87818b49 100644
|
|
--- a/hw/input/trace-events
|
|
+++ b/hw/input/trace-events
|
|
@@ -24,6 +24,7 @@ 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"
|