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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-02-08 12:54:12 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-09-20 09:26:20 +0200 |
| commit | 095cf55df715d14d5dad75326faf5984e7fc0b3a (patch) | |
| tree | 6cb5516b7594b4aaf1208b6dae4d9a1cefa9be15 /arch/x86/kvm/hyperv.h | |
| parent | KVM: x86: introduce get_kvmclock_ns (diff) | |
| download | linux-095cf55df715d14d5dad75326faf5984e7fc0b3a.tar.xz linux-095cf55df715d14d5dad75326faf5984e7fc0b3a.zip | |
KVM: x86: Hyper-V tsc page setup
Lately tsc page was implemented but filled with empty
values. This patch setup tsc page scale and offset based
on vcpu tsc, tsc_khz and HV_X64_MSR_TIME_REF_COUNT value.
The valid tsc page drops HV_X64_MSR_TIME_REF_COUNT msr
reads count to zero which potentially improves performance.
Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Reviewed-by: Peter Hornyack <peterhornyack@google.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
[Computation of TSC page parameters rewritten to use the Linux timekeeper
parameters. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/hyperv.h')
| -rw-r--r-- | arch/x86/kvm/hyperv.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h index 60eccd4bd1d3..cd1119538add 100644 --- a/arch/x86/kvm/hyperv.h +++ b/arch/x86/kvm/hyperv.h @@ -84,4 +84,7 @@ static inline bool kvm_hv_has_stimer_pending(struct kvm_vcpu *vcpu) void kvm_hv_process_stimers(struct kvm_vcpu *vcpu); +void kvm_hv_setup_tsc_page(struct kvm *kvm, + struct pvclock_vcpu_time_info *hv_clock); + #endif |