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KVM: X86: implement the logic for spinlock optimization

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get_cpl requires vcpu_load, so we must cache the result (whether the
vcpu was preempted when its cpl=0) in kvm_vcpu_arch.

Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Longpeng(Mike)
2017-08-08 12:05:33 +08:00
committed by Paolo Bonzini
parent 199b5763d3
commit de63ad4cf4
5 changed files with 21 additions and 4 deletions
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2
arch/x86/kvm/hyperv.c
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@@ -1274,7 +1274,7 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
switch (code) {
case HVCALL_NOTIFY_LONG_SPIN_WAIT:
kvm_vcpu_on_spin(vcpu, false);
kvm_vcpu_on_spin(vcpu, true);
break;
case HVCALL_POST_MESSAGE:
case HVCALL_SIGNAL_EVENT: