From: Wanpeng Li <wanpengli@xxxxxxxxxxx> Add logic to get/set the residency msrs. Then current idle power-state residency statistics can be consult by guest, and be save/restore during live migration. Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx> Signed-off-by: Wanpeng Li <wanpengli@xxxxxxxxxxx> --- arch/x86/kvm/vmx/vmx.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 2ebaa90..852f51e 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1715,6 +1715,9 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) case MSR_IA32_FEATURE_CONTROL: msr_info->data = vmx->msr_ia32_feature_control; break; + case MSR_CORE_C3_RESIDENCY ... MSR_CORE_C7_RESIDENCY: + msr_info->data = kvm_residency_read(vcpu, msr_info->index); + break; case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC: if (!nested_vmx_allowed(vcpu)) return 1; @@ -1928,6 +1931,11 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) if (msr_info->host_initiated && data == 0) vmx_leave_nested(vcpu); break; + case MSR_CORE_C3_RESIDENCY ... MSR_CORE_C7_RESIDENCY: + if (!msr_info->host_initiated) + return 1; + kvm_residency_write(vcpu, msr_info->index, data); + break; case MSR_IA32_VMX_BASIC ... MSR_IA32_VMX_VMFUNC: if (!msr_info->host_initiated) return 1; /* they are read-only */ -- 2.7.4
