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| author | Paolo Bonzini <pbonzini@redhat.com> | 2016-12-19 17:17:11 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-02-15 14:54:35 +0100 |
| commit | 76dfafd536730ef9b9d99b1cf596916d52be76d1 (patch) | |
| tree | 79cefa908a1c5ab21d3d9d21add82c2ab9b56ad4 /arch/x86/kvm/lapic.c | |
| parent | 3d92789f69162ee5689f3766e5f50bb46b7e1d97 (diff) | |
| download | talos-op-linux-76dfafd536730ef9b9d99b1cf596916d52be76d1.tar.gz talos-op-linux-76dfafd536730ef9b9d99b1cf596916d52be76d1.zip | |
KVM: x86: do not scan IRR twice on APICv vmentry
Calls to apic_find_highest_irr are scanning IRR twice, once
in vmx_sync_pir_from_irr and once in apic_search_irr. Change
sync_pir_from_irr to get the new maximum IRR from kvm_apic_update_irr;
now that it does the computation, it can also do the RVI write.
In order to avoid complications in svm.c, make the callback optional.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 8af6db9b64aa..7ed2400b2777 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -515,6 +515,7 @@ int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu) */ return apic_find_highest_irr(vcpu->arch.apic); } +EXPORT_SYMBOL_GPL(kvm_lapic_find_highest_irr); static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, int vector, int level, int trig_mode, @@ -580,9 +581,10 @@ static void pv_eoi_clr_pending(struct kvm_vcpu *vcpu) static int apic_has_interrupt_for_ppr(struct kvm_lapic *apic, u32 ppr) { int highest_irr; - if (apic->vcpu->arch.apicv_active) - kvm_x86_ops->sync_pir_to_irr(apic->vcpu); - highest_irr = apic_find_highest_irr(apic); + if (kvm_x86_ops->sync_pir_to_irr && apic->vcpu->arch.apicv_active) + highest_irr = kvm_x86_ops->sync_pir_to_irr(apic->vcpu); + else + highest_irr = apic_find_highest_irr(apic); if (highest_irr == -1 || (highest_irr & 0xF0) <= ppr) return -1; return highest_irr; |
