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? -- 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
