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| author | Andrey Smetanin <asmetanin@virtuozzo.com> | 2015-11-30 19:22:19 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-12-16 18:49:43 +0100 |
| commit | 93bf4172481c4b2a8544c83a687946252563edd0 (patch) | |
| tree | 29815ca08330bf1518cb40801f6bcfaafeaf6c1f /arch/x86/kvm | |
| parent | 0ae80384b257b0a1ffa4e5d9eab2eb559bb063c5 (diff) | |
| download | linux-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.c | 11 |
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; |