diff options
author | Marcelo Tosatti <mtosatti@redhat.com> | 2008-07-26 22:01:00 +0200 |
---|---|---|
committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 10:15:16 +0200 |
commit | f52447261bc8c21dfd4635196e32d2da1352f589 (patch) | |
tree | a0de6cefa7fbfdd07285bd60c4f61e4e2f2d4ed6 /virt | |
parent | KVM: Add irq ack notifier list (diff) | |
download | linux-f52447261bc8c21dfd4635196e32d2da1352f589.tar.xz linux-f52447261bc8c21dfd4635196e32d2da1352f589.zip |
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 'virt')
-rw-r--r-- | virt/kvm/ioapic.c | 20 | ||||
-rw-r--r-- | virt/kvm/ioapic.h | 3 |
2 files changed, 15 insertions, 8 deletions
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c index c0d22870ee9c..515cd7ce761c 100644 --- a/virt/kvm/ioapic.c +++ b/virt/kvm/ioapic.c @@ -39,6 +39,7 @@ #include "ioapic.h" #include "lapic.h" +#include "irq.h" #if 0 #define ioapic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) @@ -285,26 +286,31 @@ 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 gsi, + int trigger_mode) { union ioapic_redir_entry *ent; ent = &ioapic->redirtbl[gsi]; - 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); + kvm_notify_acked_irq(ioapic->kvm, gsi); + + 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); + } } -void kvm_ioapic_update_eoi(struct kvm *kvm, int vector) +void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode) { struct kvm_ioapic *ioapic = kvm->arch.vioapic; int i; for (i = 0; i < IOAPIC_NUM_PINS; i++) if (ioapic->redirtbl[i].fields.vector == vector) - __kvm_ioapic_update_eoi(ioapic, i); + __kvm_ioapic_update_eoi(ioapic, i, trigger_mode); } static int ioapic_in_range(struct kvm_io_device *this, gpa_t addr, diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h index 7f16675fe783..b52732f493c1 100644 --- a/virt/kvm/ioapic.h +++ b/virt/kvm/ioapic.h @@ -58,6 +58,7 @@ struct kvm_ioapic { } redirtbl[IOAPIC_NUM_PINS]; struct kvm_io_device dev; struct kvm *kvm; + void (*ack_notifier)(void *opaque, int irq); }; #ifdef DEBUG @@ -87,7 +88,7 @@ static inline int irqchip_in_kernel(struct kvm *kvm) struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector, unsigned long bitmap); -void kvm_ioapic_update_eoi(struct kvm *kvm, int vector); +void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode); int kvm_ioapic_init(struct kvm *kvm); void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level); void kvm_ioapic_reset(struct kvm_ioapic *ioapic); |