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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2017-01-24 20:09:39 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-02-07 20:16:45 +0300 |
| commit | 55dd00a73a518281bc846dc5de1a718349431eb2 (patch) | |
| tree | 13c912f125578744049bf28902e26e5e30b57b66 /arch/x86/include/uapi | |
| parent | 6342c50ad12e8ce0736e722184a7dbdea4a3477f (diff) | |
| download | linux-55dd00a73a518281bc846dc5de1a718349431eb2.tar.xz | |
KVM: x86: add KVM_HC_CLOCK_PAIRING hypercall
Add a hypercall to retrieve the host realtime clock and the TSC value
used to calculate that clock read.
Used to implement clock synchronization between host and guest.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/uapi')
| -rw-r--r-- | arch/x86/include/uapi/asm/kvm_para.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/include/uapi/asm/kvm_para.h b/arch/x86/include/uapi/asm/kvm_para.h index 1421a6585126..cff0bb6556f8 100644 --- a/arch/x86/include/uapi/asm/kvm_para.h +++ b/arch/x86/include/uapi/asm/kvm_para.h @@ -50,6 +50,15 @@ struct kvm_steal_time { __u32 pad[11]; }; +#define KVM_CLOCK_PAIRING_WALLCLOCK 0 +struct kvm_clock_pairing { + __s64 sec; + __s64 nsec; + __u64 tsc; + __u32 flags; + __u32 pad[9]; +}; + #define KVM_STEAL_ALIGNMENT_BITS 5 #define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1))) #define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1) |