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Commit b4f2225c authored by Yang Zhang's avatar Yang Zhang Committed by Marcelo Tosatti
Browse files

KVM: Return destination vcpu on interrupt injection 



Add a new parameter to know vcpus who received the interrupt.

Signed-off-by: default avatarYang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 8dc6aade

arch/x86/kvm/lapic.c

+16 −9
Original line number Diff line number Diff line
@@ -384,14 +384,16 @@ int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu) 
}



static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,

			     int vector, int level, int trig_mode);

			     int vector, int level, int trig_mode,

			     unsigned long *dest_map);



int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)

int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,

		unsigned long *dest_map)

{

	struct kvm_lapic *apic = vcpu->arch.apic;



	return __apic_accept_irq(apic, irq->delivery_mode, irq->vector,

			irq->level, irq->trig_mode);

			irq->level, irq->trig_mode, dest_map);

}



static int pv_eoi_put_user(struct kvm_vcpu *vcpu, u8 val)
@@ -564,7 +566,7 @@ int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source, 
}



bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,

		struct kvm_lapic_irq *irq, int *r)

		struct kvm_lapic_irq *irq, int *r, unsigned long *dest_map)

{

	struct kvm_apic_map *map;

	unsigned long bitmap = 1;
@@ -575,7 +577,7 @@ bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, 
	*r = -1;



	if (irq->shorthand == APIC_DEST_SELF) {

		*r = kvm_apic_set_irq(src->vcpu, irq);

		*r = kvm_apic_set_irq(src->vcpu, irq, dest_map);

		return true;

	}
@@ -620,7 +622,7 @@ bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, 
			continue;

		if (*r < 0)

			*r = 0;

		*r += kvm_apic_set_irq(dst[i]->vcpu, irq);

		*r += kvm_apic_set_irq(dst[i]->vcpu, irq, dest_map);

	}



	ret = true;
@@ -634,7 +636,8 @@ bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src, 
 * Return 1 if successfully added and 0 if discarded.

 */

static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,

			     int vector, int level, int trig_mode)

			     int vector, int level, int trig_mode,

			     unsigned long *dest_map)

{

	int result = 0;

	struct kvm_vcpu *vcpu = apic->vcpu;
@@ -647,6 +650,9 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode, 
		if (unlikely(!apic_enabled(apic)))

			break;



		if (dest_map)

			__set_bit(vcpu->vcpu_id, dest_map);



		if (trig_mode) {

			apic_debug("level trig mode for vector %d", vector);

			apic_set_vector(vector, apic->regs + APIC_TMR);
@@ -805,7 +811,7 @@ static void apic_send_ipi(struct kvm_lapic *apic) 
		   irq.trig_mode, irq.level, irq.dest_mode, irq.delivery_mode,

		   irq.vector);



	kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq);

	kvm_irq_delivery_to_apic(apic->vcpu->kvm, apic, &irq, NULL);

}



static u32 apic_get_tmcct(struct kvm_lapic *apic)
@@ -1441,7 +1447,8 @@ int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type) 
		vector = reg & APIC_VECTOR_MASK;

		mode = reg & APIC_MODE_MASK;

		trig_mode = reg & APIC_LVT_LEVEL_TRIGGER;

		return __apic_accept_irq(apic, mode, vector, 1, trig_mode);

		return __apic_accept_irq(apic, mode, vector, 1, trig_mode,

					NULL);

	}

	return 0;

}

arch/x86/kvm/lapic.h

+3 −2
Original line number Diff line number Diff line
@@ -55,11 +55,12 @@ void kvm_apic_set_version(struct kvm_vcpu *vcpu); 


int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);

int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);

int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq);

int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,

		unsigned long *dest_map);

int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);



bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,

		struct kvm_lapic_irq *irq, int *r);

		struct kvm_lapic_irq *irq, int *r, unsigned long *dest_map);



u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);

void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);

virt/kvm/ioapic.c

+1 −1
Original line number Diff line number Diff line
@@ -217,7 +217,7 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq) 
	irqe.level = 1;

	irqe.shorthand = 0;



	return kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe);

	return kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe, NULL);

}



int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,

virt/kvm/ioapic.h

+1 −1
Original line number Diff line number Diff line
@@ -92,7 +92,7 @@ int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id, 
void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);

void kvm_ioapic_reset(struct kvm_ioapic *ioapic);

int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,

		struct kvm_lapic_irq *irq);

		struct kvm_lapic_irq *irq, unsigned long *dest_map);

int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);

int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);

void kvm_ioapic_make_eoibitmap_request(struct kvm *kvm);

virt/kvm/irq_comm.c

+6 −6
Original line number Diff line number Diff line
@@ -63,7 +63,7 @@ inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq) 
}



int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,

		struct kvm_lapic_irq *irq)

		struct kvm_lapic_irq *irq, unsigned long *dest_map)

{

	int i, r = -1;

	struct kvm_vcpu *vcpu, *lowest = NULL;
@@ -74,7 +74,7 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, 
		irq->delivery_mode = APIC_DM_FIXED;

	}



	if (kvm_irq_delivery_to_apic_fast(kvm, src, irq, &r))

	if (kvm_irq_delivery_to_apic_fast(kvm, src, irq, &r, dest_map))

		return r;



	kvm_for_each_vcpu(i, vcpu, kvm) {
@@ -88,7 +88,7 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, 
		if (!kvm_is_dm_lowest_prio(irq)) {

			if (r < 0)

				r = 0;

			r += kvm_apic_set_irq(vcpu, irq);

			r += kvm_apic_set_irq(vcpu, irq, dest_map);

		} else if (kvm_lapic_enabled(vcpu)) {

			if (!lowest)

				lowest = vcpu;
@@ -98,7 +98,7 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src, 
	}



	if (lowest)

		r = kvm_apic_set_irq(lowest, irq);

		r = kvm_apic_set_irq(lowest, irq, dest_map);



	return r;

}
@@ -130,7 +130,7 @@ int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, 


	kvm_set_msi_irq(e, &irq);



	return kvm_irq_delivery_to_apic(kvm, NULL, &irq);

	return kvm_irq_delivery_to_apic(kvm, NULL, &irq, NULL);

}
@@ -142,7 +142,7 @@ static int kvm_set_msi_inatomic(struct kvm_kernel_irq_routing_entry *e, 


	kvm_set_msi_irq(e, &irq);



	if (kvm_irq_delivery_to_apic_fast(kvm, NULL, &irq, &r))

	if (kvm_irq_delivery_to_apic_fast(kvm, NULL, &irq, &r, NULL))

		return r;

	else

		return -EWOULDBLOCK;