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authorAndrey Smetanin <asmetanin@virtuozzo.com>2015-11-30 19:22:19 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2015-12-16 18:49:43 +0100
commit93bf4172481c4b2a8544c83a687946252563edd0 (patch)
tree29815ca08330bf1518cb40801f6bcfaafeaf6c1f /arch/x86/kvm
parent0ae80384b257b0a1ffa4e5d9eab2eb559bb063c5 (diff)
downloadlinux-93bf4172481c4b2a8544c83a687946252563edd0.tar.bz2
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>
Diffstat (limited to 'arch/x86/kvm')
-rw-r--r--arch/x86/kvm/hyperv.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 41869a9d43f8..99589268fe5d 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -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;