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KVM: make irq ack notifications aware of routing table 

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@redhat.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Marcelo Tosatti 2009-01-27 15:12:38 -02:00 committed by Avi Kivity
parent 934d534f8a
commit 44882eed2e
5 changed files with 21 additions and 11 deletions
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5
arch/x86/kvm/i8259.c
View File

@ -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;
}

2
arch/x86/kvm/irq.h
View File

@ -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;

2
include/linux/kvm_host.h
View File

@ -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);

10
virt/kvm/ioapic.c
View File

@ -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);
}
}

13
virt/kvm/irq_comm.c
View File

@ -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 }