Re: [Qemu-devel] [PATCH v2 1/2] ps2: add support of auto-repeat

[Anthony Liguori <aliguori@us.ibm.com>]

Paolo Bonzini <pbonzini@redhat.com> writes:

> Il 13/06/2013 06:19, Andreas Färber ha scritto:
>> Am 31.05.2013 14:31, schrieb Amos Kong:
>>> diff --git a/hw/input/ps2.c b/hw/input/ps2.c
>>> index cdb18e6..fdb9912 100644
>>> --- a/hw/input/ps2.c
>>> +++ b/hw/input/ps2.c
>>> @@ -615,7 +615,17 @@ static bool ps2_keyboard_repeatstate_needed(void
>>> *opaque)
>>>  {
>>>      PS2KbdState *s = opaque;
>>>  
>>> -    return s->repeat_period || s->repeat_delay;
>>> +    return s->repeat_period || s->repeat_delay || s->repeat_key ||
>>> s->repeat_timer;
>>> +}
>>> +
>>> +static int ps2_kbd_repeatstate_load(QEMUFile *f, void *opaque, int
>>> version_id)
>>> +{
>>> +    PS2KbdState *s = opaque;
>>> +    qemu_get_timer(f, s->repeat_timer);
>>> +    qemu_mod_timer(s->repeat_timer, qemu_get_clock_ns(vm_clock) +
>>> +                   muldiv64(get_ticks_per_sec(), s->repeat_period,
>>> 1000));
>>> +
>>> +    return 0;
>>>  }
>>>  
>>>  static bool ps2_keyboard_ledstate_needed(void *opaque)
>>> @@ -638,9 +648,12 @@ static const VMStateDescription
>>> vmstate_ps2_keyboard_repeatstate = {
>>>      .version_id = 3,
>>>      .minimum_version_id = 2,
>>>      .minimum_version_id_old = 2,
>>> +    .load_state_old = ps2_kbd_repeatstate_load,
>>>      .fields      = (VMStateField[]) {
>>>          VMSTATE_INT32(repeat_period, PS2KbdState),
>>>          VMSTATE_INT32(repeat_delay, PS2KbdState),
>>> +        VMSTATE_INT32(repeat_key, PS2KbdState),
>>> +        VMSTATE_TIMER(repeat_timer, PS2KbdState),
>> 
>> You can't just add fields here, they'd need to be specific to a new
>> version 4. Requested was to make it a subsection instead.
>
> This is already a subsection, and this patch is just a proposal to be
> squashed in this series (which adds the subsection).  But I think Amos
> is right and only the period/delay need to be migrated.  Otherwise,
> you'll get an endless stream of repeats on the destination.

Not with seamless migration and spice.

Even with a non-seamless VNC reconnect, if it happens behind the scenes
the release would still be sent.

Regards,

Anthony Liguori

>
> Paolo