The main goal is to make L2 kvm-clock be stable when it's running over L1
with stable kvm-clock.
The patch series is for x86 architecture only. If the series is approved
I'll do changes for other architectures but I don't have an ability to
compile and check for every single on (help needed)
The patch series do the following:
* change timekeeper interface to get cycles stamp value from
the timekeeper
* get rid of pvclock copy in KVM by using the changed timekeeper
interface: get time and cycles right from the timekeeper
* make KVM recognize a stable kvm-clock as stable clocksource
and use the KVM masterclock in this case, which means making
L2 stable when running over stable L1 kvm-clock
Denis Plotnikov (11):
timekeeper: change interface of clocksource reding functions
pvclock: write cycle stamp value if a pointer given
kvmclock: pass cycles pointer to the changed pvclock interface
TSC: write cycles stamp value to input pointer
timekeeping: change ktime_get_with_offset interface to accept cycles
pointer
timekeeping: add functions returning cycle stamp counter along with
time
timekeeper: add clocksource change notifier
timekeeper: add a couple of the core timekeeper reading helpers
KVM: get rid of pv_clock_gtod
pvclock: add clocksource change notification on changing of tsc stable
bit
KVM: add pvclock to a list of stable clocks.
arch/x86/hyperv/hv_init.c | 4 +-
arch/x86/include/asm/kvm_host.h | 2 +-
arch/x86/include/asm/pvclock.h | 3 +-
arch/x86/kernel/hpet.c | 4 +-
arch/x86/kernel/kvmclock.c | 19 +--
arch/x86/kernel/pvclock.c | 32 ++++-
arch/x86/kernel/tsc.c | 8 +-
arch/x86/kvm/trace.h | 27 ++--
arch/x86/kvm/x86.c | 267 ++++++++++++----------------------------
arch/x86/lguest/boot.c | 2 +-
arch/x86/platform/uv/uv_time.c | 10 +-
arch/x86/xen/time.c | 4 +-
drivers/char/hpet.c | 2 +-
drivers/clocksource/acpi_pm.c | 13 +-
drivers/hv/hv_util.c | 6 +-
include/linux/clocksource.h | 7 +-
include/linux/cs_notifier.h | 17 +++
include/linux/timekeeping.h | 35 +++++-
kernel/time/clocksource.c | 4 +-
kernel/time/jiffies.c | 2 +-
kernel/time/timekeeping.c | 119 ++++++++++++++----
21 files changed, 316 insertions(+), 271 deletions(-)
create mode 100644 include/linux/cs_notifier.h
--
2.7.4
