[Qemu-devel] [PATCH 0/2] Generic tick reinjection control

[Jan Kiszka <jan.kiszka@siemens.com>]

QEMU currently supports lost tick compensation for the periodic RTC
timer. It is controlled via -rtc driftfix=slew|none. However, the next
periodic timer with compensation qualities is approaching: KVM's
in-kernel PIT.

A previous discussion [1] showed that we need to introduce per device
control. And we likely also want a global default. Both features require
a generic standardized way to specify the compensation mode.

So this series lays the ground for that by adding a qdev property type
to select from four possible lost tick compensation policies (see patch
1 one for details). And this new property is then applied on the RTC
device.

[1] http://thread.gmane.org/gmane.comp.emulators.kvm.devel/85339

Jan Kiszka (2):
  qdev: Introduce lost tick policy property
  mc146818rtc: Use lost_tick_policy property

 hw/mc146818rtc.c     |   26 +++++++++++++++++------
 hw/qdev-properties.c |   55 ++++++++++++++++++++++++++++++++++++++++++++++++++
 hw/qdev.h            |    7 ++++++
 qemu-common.h        |    7 ++++++
 sysemu.h             |    1 -
 vl.c                 |   28 ++++++++++++++++++++----
 6 files changed, 111 insertions(+), 13 deletions(-)

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1.7.3.4