repository: /home/avi/kvm/linux-2.6
branch: master
commit 99f6c824362215f3038cfe54ddcd3c940281e9cd
Author: Avi Kivity <[EMAIL PROTECTED]>
Date: Fri Sep 21 05:29:13 2007 +0200
KVM: Fix ioapic edge-triggered interrupts
- clear irr after service
- do not service after unmasking; wait for a new edge
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
diff --git a/drivers/kvm/ioapic.c b/drivers/kvm/ioapic.c
index b0d3843..9eb5058 100644
--- a/drivers/kvm/ioapic.c
+++ b/drivers/kvm/ioapic.c
@@ -90,6 +90,8 @@ static void ioapic_service(struct kvm_ioapic *ioapic,
unsigned int idx)
if (pent->fields.trig_mode == IOAPIC_LEVEL_TRIG)
pent->fields.remote_irr = 1;
}
+ if (!pent->fields.trig_mode)
+ ioapic->irr &= ~(1 << idx);
}
static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
@@ -121,7 +123,8 @@ static void ioapic_write_indirect(struct kvm_ioapic
*ioapic, u32 val)
ioapic->redirtbl[index].bits |= (u32) val;
ioapic->redirtbl[index].fields.remote_irr = 0;
}
- ioapic_service(ioapic, index);
+ if (ioapic->irr & (1 << index))
+ ioapic_service(ioapic, index);
break;
}
}
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