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qemu/0048-input-Add-trace-event-for-empty-key.patch
Andreas Färber 36ac86c950 Accepting request 487699 from home:bfrogers:branches:Virtualization
Update to rc4 of v2.9.0. Also includes a few other fixes, and a number of tweaks to the spec files. I'd be happy to answer any questions about all those spec file changes, I believe they were all in the direction of a more correct and maintainable spec file. Since this is still in rc phase, let's keep it in devel project. Final release should appear in time for Beta2 of SLE12SP3. Delta from previous: Added Alex's patch for keyboard empty event.

OBS-URL: https://build.opensuse.org/request/show/487699
OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=334
2017-04-12 19:10:15 +00:00

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From 1337d5da71ac778f2eff10554d2de12c95d5e30e 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"