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kvm/x86: Hyper-V internal helper to read MSR HV_X64_MSR_TIME_REF_COUNT 

This helper will be used also in Hyper-V SynIC timers implementation.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: "K. Y. Srinivasan" <kys@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
CC: qemu-devel@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andrey Smetanin 2015-11-30 19:22:19 +03:00 committed by Paolo Bonzini
parent 0ae80384b2
commit 93bf417248
1 changed files with 7 additions and 4 deletions
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11
arch/x86/kvm/hyperv.c
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@ -335,6 +335,11 @@ static void synic_init(struct kvm_vcpu_hv_synic *synic)
}
}
static u64 get_time_ref_counter(struct kvm *kvm)
{
return div_u64(get_kernel_ns() + kvm->arch.kvmclock_offset, 100);
}
void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu)
{
synic_init(vcpu_to_synic(vcpu));
@ -576,11 +581,9 @@ static int kvm_hv_get_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
case HV_X64_MSR_HYPERCALL:
data = hv->hv_hypercall;
break;
case HV_X64_MSR_TIME_REF_COUNT: {
data =
div_u64(get_kernel_ns() + kvm->arch.kvmclock_offset, 100);
case HV_X64_MSR_TIME_REF_COUNT:
data = get_time_ref_counter(kvm);
break;
}
case HV_X64_MSR_REFERENCE_TSC:
data = hv->hv_tsc_page;
break;