tree 029c08e8e130130e8e59331f8b15560a7e119c66
parent e5dbc4bf0b8c9ab50cc5699214240e84515be6eb
author Paolo Bonzini <pbonzini@redhat.com> 1479317490 +0100
committer Radim Krčmář <rkrcmar@redhat.com> 1479574983 +0100

KVM: x86: do not go through vcpu in __get_kvmclock_ns

Going through the first VCPU is wrong if you follow a KVM_SET_CLOCK with
a KVM_GET_CLOCK immediately after, without letting the VCPU run and
call kvm_guest_time_update.

To fix this, compute the kvmclock value ourselves, using the master
clock (tsc, nsec) pair as the base and the host CPU frequency as
the scale.

Reported-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>