[Qemu-devel] [PATCH v2 0/5] hpet 'driftfix': alleviate time drift with HPET periodic timers

[Ulrich Obergfell <uobergfe@redhat.com>]

Hi,

This is version 2 of a series of patches that I originally posted in:

    http://lists.gnu.org/archive/html/qemu-devel/2011-03/msg01989.html
    http://lists.gnu.org/archive/html/qemu-devel/2011-03/msg01992.html
    http://lists.gnu.org/archive/html/qemu-devel/2011-03/msg01991.html
    http://lists.gnu.org/archive/html/qemu-devel/2011-03/msg01990.html

    http://article.gmane.org/gmane.comp.emulators.kvm.devel/69325
    http://article.gmane.org/gmane.comp.emulators.kvm.devel/69326
    http://article.gmane.org/gmane.comp.emulators.kvm.devel/69327
    http://article.gmane.org/gmane.comp.emulators.kvm.devel/69328

I implemented the proposed changes (remove configurability and ifdefs,
define 'driftfix' as a property of the HPET device) and I've split the
patch into smaller parts (originally 3, now 5). I also included a fix
related to scaling 't->irqs_to_inject' when the guest o/s modifies the
comparator register value.

Please review and please comment.

Regards,

Uli


Ulrich Obergfell (5):
  hpet 'driftfix': add hooks required to detect coalesced interrupts
    (x86 apic only)
  hpet 'driftfix': add driftfix property to HPETState and DeviceInfo
  hpet 'driftfix': add fields to HPETTimer and VMStateDescription
  hpet 'driftfix': add code in update_irq() to detect coalesced
    interrupts (x86 apic only)
  hpet 'driftfix': add code in hpet_timer() to compensate delayed
    callbacks and coalesced interrupts

 hw/apic.c |    4 +++
 hw/hpet.c |   90 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 sysemu.h  |    3 ++
 vl.c      |    3 ++
 4 files changed, 95 insertions(+), 5 deletions(-)