On Tue, 01 May 2012 06:33:59 +0530, Raghavendra K T <raghavendra.kt@xxxxxxxxxxxxxxxxxx> wrote: > On 04/27/2012 09:53 PM, Nikunj A. Dadhania wrote: > > The patch adds guest code for msr between guest and hypervisor. The > > msr will export the vcpu running/pre-empted information to the guest > > from host. This will enable guest to intelligently send ipi to running > > vcpus and set flag for pre-empted vcpus. This will prevent waiting for > > vcpus that are not running. > > > > Suggested-by: Peter Zijlstra<a.p.zijlstra@xxxxxxxxx> > > Signed-off-by: Nikunj A. Dadhania<nikunj@xxxxxxxxxxxxxxxxxx> > > --- > > arch/x86/include/asm/kvm_para.h | 10 ++++++++++ > > arch/x86/kernel/kvm.c | 33 +++++++++++++++++++++++++++++++++ > > 2 files changed, 43 insertions(+), 0 deletions(-) > > > > diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h > > index 77266d3..f57b5cc 100644 > > --- a/arch/x86/include/asm/kvm_para.h > > +++ b/arch/x86/include/asm/kvm_para.h > > @@ -24,6 +24,7 @@ > > #define KVM_FEATURE_ASYNC_PF 4 > > #define KVM_FEATURE_STEAL_TIME 5 > > #define KVM_FEATURE_PV_UNHALT 6 > > +#define KVM_FEATURE_VCPU_STATE 7 > > I think you intended to use KVM_FEATURE_VCPU_STATE to address > guest/host compatibility issue so that host/guest does not break > when one of them run older kernel? > Yes, thats correct. Regards Nikunj -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
