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KVM: apic: reuse smp_wmb() in kvm_make_request()

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kvm_make_request() provides smp_wmb() so pending_events changes are
guaranteed to be visible.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Miaohe Lin 2020-02-07 23:22:07 +08:00 committed by Paolo Bonzini
parent 20796447a1
commit 331ca0f89f
1 changed files with 0 additions and 3 deletions
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3
arch/x86/kvm/lapic.c
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@ -1080,9 +1080,6 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
result = 1; result = 1;
/* assumes that there are only KVM_APIC_INIT/SIPI */ /* assumes that there are only KVM_APIC_INIT/SIPI */
apic->pending_events = (1UL << KVM_APIC_INIT); apic->pending_events = (1UL << KVM_APIC_INIT);
/* make sure pending_events is visible before sending
* the request */
smp_wmb();
kvm_make_request(KVM_REQ_EVENT, vcpu); kvm_make_request(KVM_REQ_EVENT, vcpu);
kvm_vcpu_kick(vcpu); kvm_vcpu_kick(vcpu);
} }