diff options
author | Marcelo Tosatti <mtosatti@redhat.com> | 2008-07-26 20:01:00 (GMT) |
---|---|---|
committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 08:15:16 (GMT) |
commit | f52447261bc8c21dfd4635196e32d2da1352f589 (patch) | |
tree | a0de6cefa7fbfdd07285bd60c4f61e4e2f2d4ed6 /arch/x86/kvm | |
parent | 564f15378f04921d5749f27ec53d5e68a6d1d446 (diff) | |
download | linux-f52447261bc8c21dfd4635196e32d2da1352f589.tar.xz |
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')
-rw-r--r-- | arch/x86/kvm/i8259.c | 12 | ||||
-rw-r--r-- | arch/x86/kvm/irq.c | 2 | ||||
-rw-r--r-- | arch/x86/kvm/irq.h | 3 | ||||
-rw-r--r-- | arch/x86/kvm/lapic.c | 7 |
4 files changed, 19 insertions, 5 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index 55e179a..de70499 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; diff --git a/arch/x86/kvm/irq.c b/arch/x86/kvm/irq.c index 9091195..3c508af 100644 --- a/arch/x86/kvm/irq.c +++ b/arch/x86/kvm/irq.c @@ -72,7 +72,7 @@ int kvm_cpu_get_interrupt(struct kvm_vcpu *v) if (kvm_apic_accept_pic_intr(v)) { s = pic_irqchip(v->kvm); s->output = 0; /* PIC */ - vector = kvm_pic_read_irq(s); + vector = kvm_pic_read_irq(v->kvm); } } return vector; diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h index 95fe718..479a3d2 100644 --- a/arch/x86/kvm/irq.h +++ b/arch/x86/kvm/irq.h @@ -63,11 +63,12 @@ struct kvm_pic { void *irq_request_opaque; int output; /* intr from master PIC */ struct kvm_io_device dev; + void (*ack_notifier)(void *opaque, int irq); }; struct kvm_pic *kvm_create_pic(struct kvm *kvm); void kvm_pic_set_irq(void *opaque, int irq, int level); -int kvm_pic_read_irq(struct kvm_pic *s); +int kvm_pic_read_irq(struct kvm *kvm); void kvm_pic_update_irq(struct kvm_pic *s); static inline struct kvm_pic *pic_irqchip(struct kvm *kvm) diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 9fde0ac..be94f93 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -439,7 +439,7 @@ struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector, static void apic_set_eoi(struct kvm_lapic *apic) { int vector = apic_find_highest_isr(apic); - + int trigger_mode; /* * Not every write EOI will has corresponding ISR, * one example is when Kernel check timer on setup_IO_APIC @@ -451,7 +451,10 @@ static void apic_set_eoi(struct kvm_lapic *apic) apic_update_ppr(apic); if (apic_test_and_clear_vector(vector, apic->regs + APIC_TMR)) - kvm_ioapic_update_eoi(apic->vcpu->kvm, vector); + trigger_mode = IOAPIC_LEVEL_TRIG; + else + trigger_mode = IOAPIC_EDGE_TRIG; + kvm_ioapic_update_eoi(apic->vcpu->kvm, vector, trigger_mode); } static void apic_send_ipi(struct kvm_lapic *apic) |