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.
Looks good. I'll take this through my tree.
Now we can just set the appropriate globals in order to enable a default rtc
policy of slew.
Regards,
Anthony Liguori
[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(-)
