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kvm/x86: split ioapic-handled and EOI exit bitmaps
The function to determine if the vector is handled by ioapic used to rely on the fact that only ioapic-handled vectors were set up to cause vmexits when virtual apic was in use. We're going to break this assumption when introducing Hyper-V synthetic interrupts: they may need to cause vmexits too. To achieve that, introduce a new bitmap dedicated specifically for ioapic-handled vectors, and populate EOI exit bitmap from it for now. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Reviewed-by: Roman Kagan <rkagan@virtuozzo.com> Signed-off-by: Denis V. Lunev <den@openvz.org> CC: Gleb Natapov <gleb@kernel.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Roman Kagan <rkagan@virtuozzo.com> CC: Denis V. Lunev <den@openvz.org> CC: qemu-devel@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -400,7 +400,7 @@ struct kvm_vcpu_arch {
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u64 efer;
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u64 apic_base;
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struct kvm_lapic *apic; /* kernel irqchip context */
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u64 eoi_exit_bitmap[4];
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DECLARE_BITMAP(ioapic_handled_vectors, 256);
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unsigned long apic_attention;
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int32_t apic_arb_prio;
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int mp_state;
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@ -834,7 +834,7 @@ struct kvm_x86_ops {
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int (*cpu_uses_apicv)(struct kvm_vcpu *vcpu);
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void (*hwapic_irr_update)(struct kvm_vcpu *vcpu, int max_irr);
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void (*hwapic_isr_update)(struct kvm *kvm, int isr);
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void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu);
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void (*load_eoi_exitmap)(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
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void (*set_virtual_x2apic_mode)(struct kvm_vcpu *vcpu, bool set);
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void (*set_apic_access_page_addr)(struct kvm_vcpu *vcpu, hpa_t hpa);
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void (*deliver_posted_interrupt)(struct kvm_vcpu *vcpu, int vector);
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@ -233,7 +233,7 @@ static void kvm_ioapic_inject_all(struct kvm_ioapic *ioapic, unsigned long irr)
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}
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void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
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void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
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{
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struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;
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union kvm_ioapic_redirect_entry *e;
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@ -250,7 +250,7 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
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(e->fields.trig_mode == IOAPIC_EDGE_TRIG &&
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kvm_apic_pending_eoi(vcpu, e->fields.vector)))
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__set_bit(e->fields.vector,
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(unsigned long *)eoi_exit_bitmap);
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ioapic_handled_vectors);
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}
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}
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spin_unlock(&ioapic->lock);
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@ -121,7 +121,8 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
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struct kvm_lapic_irq *irq, unsigned long *dest_map);
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int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
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int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
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void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
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void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap);
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void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
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ulong *ioapic_handled_vectors);
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void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
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ulong *ioapic_handled_vectors);
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#endif
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@ -339,7 +339,8 @@ void kvm_arch_post_irq_routing_update(struct kvm *kvm)
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kvm_make_scan_ioapic_request(kvm);
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}
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void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
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void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
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ulong *ioapic_handled_vectors)
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{
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struct kvm *kvm = vcpu->kvm;
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struct kvm_kernel_irq_routing_entry *entry;
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@ -369,7 +370,7 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
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u32 vector = entry->msi.data & 0xff;
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__set_bit(vector,
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(unsigned long *) eoi_exit_bitmap);
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ioapic_handled_vectors);
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}
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}
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}
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@ -932,7 +932,7 @@ int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
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static bool kvm_ioapic_handles_vector(struct kvm_lapic *apic, int vector)
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{
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return test_bit(vector, (ulong *)apic->vcpu->arch.eoi_exit_bitmap);
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return test_bit(vector, apic->vcpu->arch.ioapic_handled_vectors);
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}
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static void kvm_ioapic_send_eoi(struct kvm_lapic *apic, int vector)
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@ -3564,7 +3564,7 @@ static int svm_cpu_uses_apicv(struct kvm_vcpu *vcpu)
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return 0;
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}
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static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu)
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static void svm_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
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{
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return;
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}
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@ -8257,9 +8257,8 @@ static void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
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}
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}
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static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu)
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static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
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{
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u64 *eoi_exit_bitmap = vcpu->arch.eoi_exit_bitmap;
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if (!vmx_cpu_uses_apicv(vcpu))
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return;
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@ -6301,15 +6301,16 @@ static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
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if (!kvm_apic_hw_enabled(vcpu->arch.apic))
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return;
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memset(vcpu->arch.eoi_exit_bitmap, 0, 256 / 8);
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bitmap_zero(vcpu->arch.ioapic_handled_vectors, 256);
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if (irqchip_split(vcpu->kvm))
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kvm_scan_ioapic_routes(vcpu, vcpu->arch.eoi_exit_bitmap);
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kvm_scan_ioapic_routes(vcpu, vcpu->arch.ioapic_handled_vectors);
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else {
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kvm_x86_ops->sync_pir_to_irr(vcpu);
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kvm_ioapic_scan_entry(vcpu, vcpu->arch.eoi_exit_bitmap);
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kvm_ioapic_scan_entry(vcpu, vcpu->arch.ioapic_handled_vectors);
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}
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kvm_x86_ops->load_eoi_exitmap(vcpu);
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kvm_x86_ops->load_eoi_exitmap(vcpu,
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(u64 *)vcpu->arch.ioapic_handled_vectors);
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}
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static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu)
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@ -6417,7 +6418,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
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if (kvm_check_request(KVM_REQ_IOAPIC_EOI_EXIT, vcpu)) {
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BUG_ON(vcpu->arch.pending_ioapic_eoi > 255);
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if (test_bit(vcpu->arch.pending_ioapic_eoi,
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(void *) vcpu->arch.eoi_exit_bitmap)) {
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vcpu->arch.ioapic_handled_vectors)) {
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vcpu->run->exit_reason = KVM_EXIT_IOAPIC_EOI;
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vcpu->run->eoi.vector =
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vcpu->arch.pending_ioapic_eoi;
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