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Date: Sat, 28 Feb 2009 03:41:27 +0200
From: Avi Kivity <avi@...hat.com>
To: kvm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 08/30] KVM: make irq ack notifications aware of routing table
From: Marcelo Tosatti <mtosatti@...hat.com>
IRQ ack notifications assume an identity mapping between pin->gsi,
which might not be the case with, for example, HPET.
Translate before acking.
Signed-off-by: Marcelo Tosatti <mtosatti@...hat.com>
Acked-by: Gleb Natapov <gleb@...hat.com>
---
arch/x86/kvm/i8259.c | 5 +++--
arch/x86/kvm/irq.h | 2 ++
include/linux/kvm_host.h | 2 +-
virt/kvm/ioapic.c | 10 +++++-----
virt/kvm/irq_comm.c | 13 ++++++++++---
5 files changed, 21 insertions(+), 11 deletions(-)
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c
index 179dcb0..9316037 100644
--- a/arch/x86/kvm/i8259.c
+++ b/arch/x86/kvm/i8259.c
@@ -49,7 +49,8 @@ static void pic_unlock(struct kvm_pic *s)
spin_unlock(&s->lock);
while (acks) {
- kvm_notify_acked_irq(kvm, __ffs(acks));
+ kvm_notify_acked_irq(kvm, SELECT_PIC(__ffs(acks)),
+ __ffs(acks));
acks &= acks - 1;
}
@@ -232,7 +233,7 @@ int kvm_pic_read_irq(struct kvm *kvm)
}
pic_update_irq(s);
pic_unlock(s);
- kvm_notify_acked_irq(kvm, irq);
+ kvm_notify_acked_irq(kvm, SELECT_PIC(irq), irq);
return intno;
}
diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h
index 82579ee..9f59318 100644
--- a/arch/x86/kvm/irq.h
+++ b/arch/x86/kvm/irq.h
@@ -32,6 +32,8 @@
#include "lapic.h"
#define PIC_NUM_PINS 16
+#define SELECT_PIC(irq) \
+ ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)
struct kvm;
struct kvm_vcpu;
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index ce285e0..c03a0a9 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -352,7 +352,7 @@ void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
-void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi);
+void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
void kvm_register_irq_ack_notifier(struct kvm *kvm,
struct kvm_irq_ack_notifier *kian);
void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian);
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index e85a2bc..1c986ac 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -293,20 +293,20 @@ void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
}
}
-static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int gsi,
+static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int pin,
int trigger_mode)
{
union ioapic_redir_entry *ent;
- ent = &ioapic->redirtbl[gsi];
+ ent = &ioapic->redirtbl[pin];
- kvm_notify_acked_irq(ioapic->kvm, gsi);
+ kvm_notify_acked_irq(ioapic->kvm, KVM_IRQCHIP_IOAPIC, pin);
if (trigger_mode == IOAPIC_LEVEL_TRIG) {
ASSERT(ent->fields.trig_mode == IOAPIC_LEVEL_TRIG);
ent->fields.remote_irr = 0;
- if (!ent->fields.mask && (ioapic->irr & (1 << gsi)))
- ioapic_service(ioapic, gsi);
+ if (!ent->fields.mask && (ioapic->irr & (1 << pin)))
+ ioapic_service(ioapic, pin);
}
}
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index a797fa5..7aa5086 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -59,10 +59,19 @@ void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
e->set(e, kvm, !!(*irq_state));
}
-void kvm_notify_acked_irq(struct kvm *kvm, unsigned gsi)
+void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
{
+ struct kvm_kernel_irq_routing_entry *e;
struct kvm_irq_ack_notifier *kian;
struct hlist_node *n;
+ unsigned gsi = pin;
+
+ list_for_each_entry(e, &kvm->irq_routing, link)
+ if (e->irqchip.irqchip == irqchip &&
+ e->irqchip.pin == pin) {
+ gsi = e->gsi;
+ break;
+ }
hlist_for_each_entry(kian, n, &kvm->arch.irq_ack_notifier_list, link)
if (kian->gsi == gsi)
@@ -237,8 +246,6 @@ out:
#define ROUTING_ENTRY1(irq) IOAPIC_ROUTING_ENTRY(irq)
#ifdef CONFIG_X86
-#define SELECT_PIC(irq) \
- ((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)
# define PIC_ROUTING_ENTRY(irq) \
{ .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \
.u.irqchip.irqchip = SELECT_PIC(irq), .u.irqchip.pin = (irq) % 8 }
--
1.6.0.6
--
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