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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2008-07-26 17:01:00 -0300 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 10:15:16 +0200 |
| commit | f52447261bc8c21dfd4635196e32d2da1352f589 (patch) | |
| tree | a0de6cefa7fbfdd07285bd60c4f61e4e2f2d4ed6 /arch/x86/kvm/i8259.c | |
| parent | 564f15378f04921d5749f27ec53d5e68a6d1d446 (diff) | |
| download | linux-f52447261bc8c21dfd4635196e32d2da1352f589.tar.bz2 | |
KVM: irq ack notification
Based on a patch from: Ben-Ami Yassour <benami@il.ibm.com>
which was based on a patch from: Amit Shah <amit.shah@qumranet.com>
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 <mtosatti@redhat.com>
CC: Amit Shah <amit.shah@qumranet.com>
CC: Ben-Ami Yassour <benami@il.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm/i8259.c')
| -rw-r--r-- | arch/x86/kvm/i8259.c | 12 |
1 files changed, 11 insertions, 1 deletions
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; |