After exposing some host CPU power management capabilities to dedicated instances, there is a requirement to consult current idle power-state residency statistics by turbostat. This patchset adds virtual C-states residency msrs emulation. Allowing guest reads CORE cstate when exposing host CPU power management capabilities to the guest. PKG cstate is restricted currently to avoid a guest to get the whole package information in multi-tenant scenario. v1 -> v2: * add residency msrs emulation (base on Paolo's design) Wanpeng Li (5): KVM: X86: Dynamic allocate core residency msr state KVM: X86: Introduce residency msrs read/write operations KVM: X86: setup residency msrs during vCPU creation KVM: VMX: Add get/set residency msrs logic KVM: X86: Save/restore residency values when sched_out/sched_in arch/arm/include/asm/kvm_host.h | 1 + arch/arm64/include/asm/kvm_host.h | 1 + arch/mips/include/asm/kvm_host.h | 1 + arch/powerpc/include/asm/kvm_host.h | 1 + arch/s390/include/asm/kvm_host.h | 1 + arch/x86/include/asm/kvm_host.h | 11 ++++ arch/x86/kvm/vmx/vmx.c | 15 ++++++ arch/x86/kvm/x86.c | 104 ++++++++++++++++++++++++++++++++++++ arch/x86/kvm/x86.h | 5 ++ include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 1 + 11 files changed, 142 insertions(+) -- 2.7.4
