[PATCH 0/5] pv clock misc fixes

Glauber Costa
2010-04-15T18:39:13Z

Hello folks,

In this series, I present a couple of fixes for kvmclock.
In patch 1, a guest-side fix is proposed for a problem that is biting us
for quite a while now. the tsc inside VMs does not seem to be
that good, (up to now, only single-socket nehalems were stable enough),
and we're seeing small (but nevertheless wrong) time warps inside SMP guests.
I am proposing the fix to reside on common code in pvclock.c, but would
be good to hear Jeremy on this.

On the other 3 patches, I change kvmclock MSR numbers in a compatible
fashion. Both MSR sets will be supported for a while.

Patch 5 adds documentation about kvmclock, which to date, we lacked.

Glauber Costa (5):
Add a global synchronization point for pvclock
change msr numbers for kvmclock
Try using new kvm clock msrs
export new cpuid KVM_CAP
add documentation about kvmclock

Documentation/kvm/kvmclock.txt | 138 +++++++++++++++++++++++++++++++++++++++
arch/x86/include/asm/kvm_para.h | 12 +++-
arch/x86/kernel/kvmclock.c | 68 +++++++++++++------
arch/x86/kernel/pvclock.c | 23 +++++++
arch/x86/kvm/x86.c | 13 ++++-
include/linux/kvm.h | 1 +
6 files changed, 231 insertions(+), 24 deletions(-)
create mode 100644 Documentation/kvm/kvmclock.txt