tree 90ca8a72bf9fd7fc79652a8c772f00ae32574606
parent 83781d180b219bd079ae72b341ee3f21fb236e97
author Paolo Bonzini <pbonzini@redhat.com> 1481533973 +0100
committer Paolo Bonzini <pbonzini@redhat.com> 1481907218 +0100

KVM: hyperv: fix locking of struct kvm_hv fields

Introduce a new mutex to avoid an AB-BA deadlock between kvm->lock and
vcpu->mutex.  Protect accesses in kvm_hv_setup_tsc_page too, as suggested
by Roman.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>