[PATCH v5 3/6] KVM : Calculate destination vcpu on interrupt injection

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From: Yang Zhang <yang.z.zhang@xxxxxxxxx>

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

Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>
---
 arch/x86/kvm/lapic.c |   21 ++++++++++++++++-----
 arch/x86/kvm/lapic.h |    5 +++--
 virt/kvm/ioapic.c    |    2 +-
 virt/kvm/ioapic.h    |    2 +-
 virt/kvm/irq_comm.c  |   12 ++++++------
 5 files changed, 27 insertions(+), 15 deletions(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index d3e322a..5f6b1d0 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -433,10 +433,21 @@ 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 kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
+static void kvm_set_irq_dest_map(struct kvm_vcpu *vcpu, unsigned long *dest_map)
+{
+	if (!kvm_lapic_enabled(vcpu))
+		return;
+	__set_bit(vcpu->vcpu_id, dest_map);
+}
+
+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;
 
+	if (dest_map)
+		kvm_set_irq_dest_map(vcpu, dest_map);
+
 	return __apic_accept_irq(apic, irq->delivery_mode, irq->vector,
 			irq->level, irq->trig_mode);
 }
@@ -611,7 +622,7 @@ 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;
@@ -622,7 +633,7 @@ 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;
 	}
 
@@ -667,7 +678,7 @@ 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;
@@ -852,7 +863,7 @@ 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)
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 2c721b9..967519c 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -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);
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index ed6f111..4767fa6 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -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,
diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
index 6e5c88f..14e5289 100644
--- a/virt/kvm/ioapic.h
+++ b/virt/kvm/ioapic.h
@@ -88,7 +88,7 @@ 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);
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index e9073cf..2f07d2e 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -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;
-- 
1.7.1

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