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


From: Anthony Liguori
Subject: Re: [Qemu-devel] [PATCH 0/2] Generic tick reinjection control
Date: Wed, 01 Feb 2012 16:10:53 -0600
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.23) Gecko/20110922 Lightning/1.0b2 Thunderbird/3.1.15

On 01/23/2012 01:15 PM, Jan Kiszka wrote:
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

Applied.  Thanks.

Regards,

Anthony Liguori


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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