hw/input/ps2: Use ps2_raise_irq() instead of open coding it

Inspired-by: Volker Rümelin <vr_qemu@t-online.de>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Volker Rümelin <vr_

hw/input/ps2: Use ps2_raise_irq() instead of open coding it

Inspired-by: Volker Rümelin <vr_qemu@t-online.de>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Volker Rümelin <vr_qemu@t-online.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-Id: <20210513171244.3940519-1-f4bug@amsat.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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pckbd: clear outport_present in outer pre_load()

The variable outport_present is a flag to show if the outport
subsection was loaded. Clear the outport_present flag in the
outer pre_load() function.

pckbd: clear outport_present in outer pre_load()

The variable outport_present is a flag to show if the outport
subsection was loaded. Clear the outport_present flag in the
outer pre_load() function. This method is recommended in the QEMU
manual for developers in the chapter "Migration, Subsections".

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-12-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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pckbd: remove duplicated keyboard and mouse defines

In 2005 the author of commit daa579632d "PS2 mouse and keyboard
separation (Paul Brook)" and 0e43e99c04 "PS2 mouse and keyboard
separation (Paul B

pckbd: remove duplicated keyboard and mouse defines

In 2005 the author of commit daa579632d "PS2 mouse and keyboard
separation (Paul Brook)" and 0e43e99c04 "PS2 mouse and keyboard
separation (Paul Brook)" separated the PS/2 controller code and
the PS/2 keyboard and mouse code. It seems he forgot to remove
a few defines. Remove them now.

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-11-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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pckbd: correctly disable PS/2 communication

Currently the PS/2 controller command KBD_CCMD_MOUSE_DISABLE
doesn't disable the PS/2 mouse communication at all, and the
PS/2 controller commands KBD_CCM

pckbd: correctly disable PS/2 communication

Currently the PS/2 controller command KBD_CCMD_MOUSE_DISABLE
doesn't disable the PS/2 mouse communication at all, and the
PS/2 controller commands KBD_CCMD_KBD_DISABLE and
KBD_CCMD_KBD_ENABLE only disable and enable the keyboard
interrupt, which is very different from what a real PS/2
controller does. A guest may notice the difference.

Mask out pending data on disabled queues to correctly disable
the PS/2 controller communication.

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-10-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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pckbd: add function kbd_pending()

Replace reads of the variable s->pending with a call to a new
function kbd_pending() to ease the review of the next patch.
There is no functional change.

Reviewed-

pckbd: add function kbd_pending()

Replace reads of the variable s->pending with a call to a new
function kbd_pending() to ease the review of the next patch.
There is no functional change.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-9-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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pckbd: add controller response queue

Add a separate queue for PS/2 controller responses. The
responses no longer get queued in the keyboard or mouse queues.
The advantage of this can be seen after t

pckbd: add controller response queue

Add a separate queue for PS/2 controller responses. The
responses no longer get queued in the keyboard or mouse queues.
The advantage of this can be seen after the next two patches,
where the guest can disable the PS/2 communication with keyboard
and mouse and still talk to the PS/2 controller.

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-8-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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pckbd: add state variable for interrupt source

Currently there is only one flag to distinguish between two
interrupt sources and there are no available flags for more
sources. Add an internal state

pckbd: add state variable for interrupt source

Currently there is only one flag to distinguish between two
interrupt sources and there are no available flags for more
sources. Add an internal state variable to store the interrupt
source. The next patch will introduce an additional interrupt
source. There is no functional change.

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-7-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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pckbd: PS/2 keyboard throttle

Limit the keyboard data rate to the serial link speed. Some old
DOS software relies on being able to read an incoming scan-code
more than once. After reading keyboard d

pckbd: PS/2 keyboard throttle

Limit the keyboard data rate to the serial link speed. Some old
DOS software relies on being able to read an incoming scan-code
more than once. After reading keyboard data from the i8042
controller, the guest software has 1ms to read the same data
again.

Use -global i8042.kbd-throttle=on to enable this feature.

To see how this patch works, start a FreeDOS 1.2 guest with the
qemu option -global i8042.kbd-throttle=on and open a text file
with the vim 7.3 32 bit for DOS executable. Then use the cursor
keys (not the cursor keys on the numeric keypad) to move through
the text. Without the kbd-throttle option enabled each keystroke
will move the cursor two positions.

Buglink: https://bugs.launchpad.net/bugs/1895363
Buglink: https://bugs.launchpad.net/bugs/1897568
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-6-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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pckbd: don't update OBF flags if KBD_STAT_OBF is set

Don't update the OBF flags in the status register and the cor-
responding IRQ lines if KBD_STAT_OBF is set. Otherwise this
may change the PS/2 ev

pckbd: don't update OBF flags if KBD_STAT_OBF is set

Don't update the OBF flags in the status register and the cor-
responding IRQ lines if KBD_STAT_OBF is set. Otherwise this
may change the PS/2 event type. If the guest ISR was already
scheduled, the changed event type will be rather surprising for
the guest.

This fixes a mouse event stream corruption. To reproduce the
problem start a FreeDOS 1.2 guest with -machine pc,accel=kvm
and -display gtk. The KVM in-kernel irqchip has to be enabled.
Now open a text file with edit.exe in the guest and hold down
the cursor right key and at the same time move the mouse around.
You will quickly notice erratic mouse movements and unexpected
mouse clicks.

A trace file shows the mouse event stream corruption. Guest
rip 0xce93 (f000:ce93) is the in al,0x60 instruction in the
seabios mouse ISR, guest rip 0xceca (f000:ceca) is the
in al,0x60 instruction in the seabios keyboard ISR.

qemu-system-x86-5659 [007] .... 280.971116:
tracing_mark_write: pckbd_kbd_update_irq kbd=0 aux=1
# gtk queues a mouse event

qemu-system-x86-5665 [000] .... 280.971121:
kvm_exit: reason EXTERNAL_INTERRUPT rip 0x22da info 0 800000fd
qemu-system-x86-5665 [000] d..1 280.971122:
kvm_entry: vcpu 0, rip 0x22da
qemu-system-x86-5665 [000] .... 280.971123:
kvm_exit: reason EXTERNAL_INTERRUPT rip 0x22da info 0 800000fd
qemu-system-x86-5665 [000] d..1 280.971124:
kvm_entry: vcpu 0, rip 0x22da
qemu-system-x86-5665 [000] .... 280.971126:
kvm_exit: reason IO_INSTRUCTION rip 0x110c8c info 640008 0
qemu-system-x86-5665 [000] .... 280.971176:
tracing_mark_write: pckbd_kbd_read_status 0x3d
# KBD_STAT_OBF and KBD_STAT_MOUSE_OBF set, the mouse ISR will
# read data from the PS/2 controller.

qemu-system-x86-5665 [000] d..1 280.971180:
kvm_entry: vcpu 0, rip 0x110c8d
qemu-system-x86-5665 [000] .... 280.971191:
kvm_exit: reason EXTERNAL_INTERRUPT rip 0x110c8d info 0 800000f6
qemu-system-x86-5665 [000] d..1 280.971191:
kvm_entry: vcpu 0, rip 0x110c8d
qemu-system-x86-5665 [000] .... 280.971193:
kvm_exit: reason IO_INSTRUCTION rip 0xce93 info 600048 0
# the mouse ISR wants to read data from the PS/2 controller

qemu-system-x86-5659 [007] .... 280.971231:
tracing_mark_write: pckbd_kbd_update_irq kbd=1 aux=0
qemu-system-x86-5659 [007] .... 280.971238:
tracing_mark_write: pckbd_kbd_update_irq kbd=1 aux=0
# gtk queues a keyboard event 0xe0 0x4d (key right)

qemu-system-x86-5665 [000] .... 280.971257:
tracing_mark_write: pckbd_kbd_update_irq kbd=0 aux=1
qemu-system-x86-5665 [000] .... 280.971262:
tracing_mark_write: pckbd_kbd_update_irq kbd=1 aux=0
# ps2_read_data() deasserts and reasserts the keyboard IRQ

qemu-system-x86-5665 [000] .... 280.971266:
tracing_mark_write: pckbd_kbd_read_data 0xe0 kbd
# -> the mouse ISR receives keyboard data

qemu-system-x86-5665 [000] d..1 280.971268:
kvm_entry: vcpu 0, rip 0xce95
qemu-system-x86-5665 [000] .... 280.971269:
kvm_exit: reason IO_INSTRUCTION rip 0xe828 info a00040 0
qemu-system-x86-5665 [000] .... 280.971270:
kvm_ack_irq: irqchip PIC slave pin 12
qemu-system-x86-5665 [000] d..1 280.971270:
kvm_entry: vcpu 0, rip 0xe82a
qemu-system-x86-5665 [000] .... 280.971271:
kvm_exit: reason IO_INSTRUCTION rip 0xe82a info 200040 0
qemu-system-x86-5665 [000] .... 280.971271:
kvm_ack_irq: irqchip PIC master pin 2
qemu-system-x86-5665 [000] d..1 280.971271:
kvm_entry: vcpu 0, rip 0xe82c
qemu-system-x86-5665 [000] .... 280.971272:
kvm_exit: reason PENDING_INTERRUPT rip 0x22da info 0 0
qemu-system-x86-5665 [000] d..1 280.971273:
kvm_entry: vcpu 0, rip 0x22da
qemu-system-x86-5665 [000] .... 280.971274:
kvm_exit: reason IO_INSTRUCTION rip 0x110c8c info 640008 0
qemu-system-x86-5665 [000] .... 280.971275:
tracing_mark_write: pckbd_kbd_read_status 0x1d
qemu-system-x86-5665 [000] d..1 280.971276:
kvm_entry: vcpu 0, rip 0x110c8d
qemu-system-x86-5665 [000] .... 280.971277:
kvm_exit: reason IO_INSTRUCTION rip 0xceca info 600048 0
# the keyboard ISR wants to read data from the PS/2 controller

qemu-system-x86-5665 [000] .... 280.971279:
tracing_mark_write: pckbd_kbd_update_irq kbd=0 aux=1
qemu-system-x86-5665 [000] .... 280.971282:
tracing_mark_write: pckbd_kbd_read_data 0x4d kbd
# the keyboard ISR receives the second byte of the keyboard event

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-5-vr_qemu@t-online.de>

[ kraxel: add missing include ]

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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pckbd: split out interrupt line changing code

Split out the interrupt line changing code from kbd_update_irq().
This is a preparation for the next patch. There is no functional
change.

Reviewed-by:

pckbd: split out interrupt line changing code

Split out the interrupt line changing code from kbd_update_irq().
This is a preparation for the next patch. There is no functional
change.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-4-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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ps2: don't deassert irq twice if queue is empty

Don't deassert the irq twice if the queue is empty. While the
second deassertion doesn't do any harm, it's unnecessary.

Reviewed-by: Philippe Mathieu

ps2: don't deassert irq twice if queue is empty

Don't deassert the irq twice if the queue is empty. While the
second deassertion doesn't do any harm, it's unnecessary.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-3-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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ps2: don't raise an interrupt if queue is full

ps2_queue() behaves differently than the very similar functions
ps2_queue_2() to ps2_queue_4(). The first one calls update_irq()
even if the queue is f

ps2: don't raise an interrupt if queue is full

ps2_queue() behaves differently than the very similar functions
ps2_queue_2() to ps2_queue_4(). The first one calls update_irq()
even if the queue is full, the others don't. Change ps2_queue()
to be consistent with the others.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-2-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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ps2: fix mouse stream corruption

Commit 7abe7eb294 "ps2: Fix mouse stream corruption due to lost data"
added code to avoid mouse stream corruptions but the calculation of
the needed free queue size

ps2: fix mouse stream corruption

Commit 7abe7eb294 "ps2: Fix mouse stream corruption due to lost data"
added code to avoid mouse stream corruptions but the calculation of
the needed free queue size was wrong. Fix this.

To reproduce, open a text file with the vim 7.3 32 bit for DOS exe-
cutable in a FreeDOS client started with -display sdl and move the
mouse around for a few seconds. You will quickly see erratic mouse
movements and unexpected mouse clicks. CuteMouse (ctmouse.exe) in
FreeDOS doesn't try to re-sync the mouse stream.

Fixes: 7abe7eb294 ("ps2: Fix mouse stream corruption due to lost data")
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20210525181441.27768-1-vr_qemu@t-online.de>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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hw/input: expand trace info reported for ps2 device

It is interesting to know if the PS2 keyboard is in translated mode, and
which of the three scancode sets are in use.

Reviewed-by: Philippe Mathi

hw/input: expand trace info reported for ps2 device

It is interesting to know if the PS2 keyboard is in translated mode, and
which of the three scancode sets are in use.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210309155804.306051-1-berrange@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

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Fix build with 64 bits time_t

time element is deprecated on new input_event structure in kernel's
input.h [1]

This will avoid the following build failure:

hw/input/virtio-input-host.c: In function

Fix build with 64 bits time_t

time element is deprecated on new input_event structure in kernel's
input.h [1]

This will avoid the following build failure:

hw/input/virtio-input-host.c: In function 'virtio_input_host_handle_status':
hw/input/virtio-input-host.c:198:28: error: 'struct input_event' has no member named 'time'
198 | if (gettimeofday(&evdev.time, NULL)) {
| ^

Fixes:
- http://autobuild.buildroot.org/results/a538167e288c14208d557cd45446df86d3d599d5
- http://autobuild.buildroot.org/results/efd4474fb4b6c0ce0ab3838ce130429c51e43bbb

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=152194fe9c3f

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Message-Id: <20201203195819.583626-1-fontaine.fabrice@gmail.com>
Fixes: https://gitlab.com/qemu-project/qemu/-/issues/246
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

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Drop the deprecated lm32 target

Target lm32 was deprecated in commit d8498005122, v5.2.0. See there
for rationale.

Some of its code lives on in device models derived from milkymist
ones: hw/char/d

Drop the deprecated lm32 target

Target lm32 was deprecated in commit d8498005122, v5.2.0. See there
for rationale.

Some of its code lives on in device models derived from milkymist
ones: hw/char/digic-uart.c and hw/display/bcm2835_fb.c.

Cc: Michael Walle <michael@walle.cc>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210503084034.3804963-2-armbru@redhat.com>
Acked-by: Michael Walle <michael@walle.cc>
[Trivial conflicts resolved, reST markup fixed]

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Do not include sysemu/sysemu.h if it's not really necessary

Stop including sysemu/sysemu.h in files that don't need it.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210416171314.207

Do not include sysemu/sysemu.h if it's not really necessary

Stop including sysemu/sysemu.h in files that don't need it.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20210416171314.2074665-2-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

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hw: Do not include hw/sysbus.h if it is not necessary

Many files include hw/sysbus.h without needing it. Remove the superfluous
include statements.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Rev

hw: Do not include hw/sysbus.h if it is not necessary

Many files include hw/sysbus.h without needing it. Remove the superfluous
include statements.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210327082804.2259480-1-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

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hw: Remove superfluous includes of hw/hw.h

The include/hw/hw.h header only has a prototype for hw_error(),
so it does not make sense to include this in files that do not
use this function.

Signed-o

hw: Remove superfluous includes of hw/hw.h

The include/hw/hw.h header only has a prototype for hw_error(),
so it does not make sense to include this in files that do not
use this function.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210326151848.2217216-1-thuth@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

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