From f52447261bc8c21dfd4635196e32d2da1352f589 Mon Sep 17 00:00:00 2001 From: Marcelo Tosatti Date: Sat, 26 Jul 2008 17:01:00 -0300 Subject: KVM: irq ack notification Based on a patch from: Ben-Ami Yassour which was based on a patch from: Amit Shah Notify IRQ acking on PIC/APIC emulation. The previous patch missed two things: - Edge triggered interrupts on IOAPIC - PIC reset with IRR/ISR set should be equivalent to ack (LAPIC probably needs something similar). Signed-off-by: Marcelo Tosatti CC: Amit Shah CC: Ben-Ami Yassour Signed-off-by: Avi Kivity --- arch/x86/kvm/i8259.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'arch/x86/kvm/i8259.c') diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index 55e179ad98ef..de704995b819 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -159,9 +159,10 @@ static inline void pic_intack(struct kvm_kpic_state *s, int irq) s->irr &= ~(1 << irq); } -int kvm_pic_read_irq(struct kvm_pic *s) +int kvm_pic_read_irq(struct kvm *kvm) { int irq, irq2, intno; + struct kvm_pic *s = pic_irqchip(kvm); irq = pic_get_irq(&s->pics[0]); if (irq >= 0) { @@ -187,12 +188,21 @@ int kvm_pic_read_irq(struct kvm_pic *s) intno = s->pics[0].irq_base + irq; } pic_update_irq(s); + kvm_notify_acked_irq(kvm, irq); return intno; } void kvm_pic_reset(struct kvm_kpic_state *s) { + int irq; + struct kvm *kvm = s->pics_state->irq_request_opaque; + + for (irq = 0; irq < PIC_NUM_PINS; irq++) { + if (!(s->imr & (1 << irq)) && (s->irr & (1 << irq) || + s->isr & (1 << irq))) + kvm_notify_acked_irq(kvm, irq); + } s->last_irr = 0; s->irr = 0; s->imr = 0; -- cgit v1.2.3