KVM: Report IRQ injection status to userspace.
IRQ injection status is either -1 (if there was no CPU found that should except the interrupt because IRQ was masked or ioapic was misconfigured or ...) or >= 0 in that case the number indicates to how many CPUs interrupt was injected. If the value is 0 it means that the interrupt was coalesced and probably should be reinjected. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
parent
452425dbaa
commit
4925663a07
@ -182,7 +182,7 @@ int kvm_dev_ioctl_check_extension(long ext)
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switch (ext) {
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switch (ext) {
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case KVM_CAP_IRQCHIP:
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case KVM_CAP_IRQCHIP:
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case KVM_CAP_MP_STATE:
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case KVM_CAP_MP_STATE:
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case KVM_CAP_IRQ_INJECT_STATUS:
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r = 1;
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r = 1;
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break;
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break;
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case KVM_CAP_COALESCED_MMIO:
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case KVM_CAP_COALESCED_MMIO:
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@ -927,6 +927,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
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goto out;
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goto out;
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}
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}
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break;
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break;
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case KVM_IRQ_LINE_STATUS:
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case KVM_IRQ_LINE: {
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case KVM_IRQ_LINE: {
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struct kvm_irq_level irq_event;
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struct kvm_irq_level irq_event;
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@ -934,10 +935,17 @@ long kvm_arch_vm_ioctl(struct file *filp,
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if (copy_from_user(&irq_event, argp, sizeof irq_event))
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if (copy_from_user(&irq_event, argp, sizeof irq_event))
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goto out;
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goto out;
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if (irqchip_in_kernel(kvm)) {
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if (irqchip_in_kernel(kvm)) {
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__s32 status;
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mutex_lock(&kvm->lock);
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mutex_lock(&kvm->lock);
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kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
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status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
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irq_event.irq, irq_event.level);
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irq_event.irq, irq_event.level);
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->lock);
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if (ioctl == KVM_IRQ_LINE_STATUS) {
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irq_event.status = status;
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if (copy_to_user(argp, &irq_event,
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sizeof irq_event))
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goto out;
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}
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r = 0;
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r = 0;
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}
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}
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break;
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break;
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@ -616,7 +616,7 @@ void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
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void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
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void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2,
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u32 error_code);
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u32 error_code);
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void kvm_pic_set_irq(void *opaque, int irq, int level);
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int kvm_pic_set_irq(void *opaque, int irq, int level);
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void kvm_inject_nmi(struct kvm_vcpu *vcpu);
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void kvm_inject_nmi(struct kvm_vcpu *vcpu);
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@ -77,12 +77,13 @@ void kvm_pic_clear_isr_ack(struct kvm *kvm)
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/*
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/*
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* set irq level. If an edge is detected, then the IRR is set to 1
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* set irq level. If an edge is detected, then the IRR is set to 1
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*/
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*/
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static inline void pic_set_irq1(struct kvm_kpic_state *s, int irq, int level)
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static inline int pic_set_irq1(struct kvm_kpic_state *s, int irq, int level)
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{
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{
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int mask;
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int mask, ret = 1;
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mask = 1 << irq;
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mask = 1 << irq;
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if (s->elcr & mask) /* level triggered */
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if (s->elcr & mask) /* level triggered */
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if (level) {
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if (level) {
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ret = !(s->irr & mask);
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s->irr |= mask;
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s->irr |= mask;
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s->last_irr |= mask;
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s->last_irr |= mask;
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} else {
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} else {
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@ -91,11 +92,15 @@ static inline void pic_set_irq1(struct kvm_kpic_state *s, int irq, int level)
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}
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}
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else /* edge triggered */
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else /* edge triggered */
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if (level) {
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if (level) {
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if ((s->last_irr & mask) == 0)
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if ((s->last_irr & mask) == 0) {
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ret = !(s->irr & mask);
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s->irr |= mask;
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s->irr |= mask;
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}
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s->last_irr |= mask;
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s->last_irr |= mask;
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} else
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} else
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s->last_irr &= ~mask;
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s->last_irr &= ~mask;
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return (s->imr & mask) ? -1 : ret;
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}
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}
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/*
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/*
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@ -172,16 +177,19 @@ void kvm_pic_update_irq(struct kvm_pic *s)
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pic_unlock(s);
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pic_unlock(s);
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}
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}
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void kvm_pic_set_irq(void *opaque, int irq, int level)
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int kvm_pic_set_irq(void *opaque, int irq, int level)
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{
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{
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struct kvm_pic *s = opaque;
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struct kvm_pic *s = opaque;
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int ret = -1;
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pic_lock(s);
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pic_lock(s);
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if (irq >= 0 && irq < PIC_NUM_PINS) {
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if (irq >= 0 && irq < PIC_NUM_PINS) {
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pic_set_irq1(&s->pics[irq >> 3], irq & 7, level);
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ret = pic_set_irq1(&s->pics[irq >> 3], irq & 7, level);
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pic_update_irq(s);
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pic_update_irq(s);
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}
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}
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pic_unlock(s);
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pic_unlock(s);
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return ret;
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}
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}
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/*
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/*
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@ -1019,6 +1019,7 @@ int kvm_dev_ioctl_check_extension(long ext)
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case KVM_CAP_MP_STATE:
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case KVM_CAP_MP_STATE:
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case KVM_CAP_SYNC_MMU:
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case KVM_CAP_SYNC_MMU:
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case KVM_CAP_REINJECT_CONTROL:
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case KVM_CAP_REINJECT_CONTROL:
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case KVM_CAP_IRQ_INJECT_STATUS:
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r = 1;
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r = 1;
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break;
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break;
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case KVM_CAP_COALESCED_MMIO:
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case KVM_CAP_COALESCED_MMIO:
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@ -1877,6 +1878,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
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create_pit_unlock:
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create_pit_unlock:
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->lock);
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break;
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break;
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case KVM_IRQ_LINE_STATUS:
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case KVM_IRQ_LINE: {
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case KVM_IRQ_LINE: {
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struct kvm_irq_level irq_event;
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struct kvm_irq_level irq_event;
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@ -1884,10 +1886,17 @@ long kvm_arch_vm_ioctl(struct file *filp,
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if (copy_from_user(&irq_event, argp, sizeof irq_event))
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if (copy_from_user(&irq_event, argp, sizeof irq_event))
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goto out;
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goto out;
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if (irqchip_in_kernel(kvm)) {
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if (irqchip_in_kernel(kvm)) {
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__s32 status;
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mutex_lock(&kvm->lock);
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mutex_lock(&kvm->lock);
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kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
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status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
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irq_event.irq, irq_event.level);
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irq_event.irq, irq_event.level);
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->lock);
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if (ioctl == KVM_IRQ_LINE_STATUS) {
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irq_event.status = status;
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if (copy_to_user(argp, &irq_event,
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sizeof irq_event))
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goto out;
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}
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r = 0;
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r = 0;
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}
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}
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break;
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break;
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@ -48,7 +48,10 @@ struct kvm_irq_level {
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* For IA-64 (APIC model) IOAPIC0: irq 0-23; IOAPIC1: irq 24-47..
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* For IA-64 (APIC model) IOAPIC0: irq 0-23; IOAPIC1: irq 24-47..
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* For X86 (standard AT mode) PIC0/1: irq 0-15. IOAPIC0: 0-23..
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* For X86 (standard AT mode) PIC0/1: irq 0-15. IOAPIC0: 0-23..
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*/
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*/
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__u32 irq;
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union {
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__u32 irq;
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__s32 status;
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};
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__u32 level;
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__u32 level;
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};
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};
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@ -402,6 +405,7 @@ struct kvm_trace_rec {
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#ifdef __KVM_HAVE_IOAPIC
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#ifdef __KVM_HAVE_IOAPIC
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#define KVM_CAP_IRQ_ROUTING 25
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#define KVM_CAP_IRQ_ROUTING 25
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#endif
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#endif
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#define KVM_CAP_IRQ_INJECT_STATUS 26
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#ifdef KVM_CAP_IRQ_ROUTING
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#ifdef KVM_CAP_IRQ_ROUTING
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@ -465,6 +469,7 @@ struct kvm_irq_routing {
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#define KVM_CREATE_PIT _IO(KVMIO, 0x64)
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#define KVM_CREATE_PIT _IO(KVMIO, 0x64)
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#define KVM_GET_PIT _IOWR(KVMIO, 0x65, struct kvm_pit_state)
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#define KVM_GET_PIT _IOWR(KVMIO, 0x65, struct kvm_pit_state)
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#define KVM_SET_PIT _IOR(KVMIO, 0x66, struct kvm_pit_state)
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#define KVM_SET_PIT _IOR(KVMIO, 0x66, struct kvm_pit_state)
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#define KVM_IRQ_LINE_STATUS _IOWR(KVMIO, 0x67, struct kvm_irq_level)
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#define KVM_REGISTER_COALESCED_MMIO \
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#define KVM_REGISTER_COALESCED_MMIO \
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_IOW(KVMIO, 0x67, struct kvm_coalesced_mmio_zone)
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_IOW(KVMIO, 0x67, struct kvm_coalesced_mmio_zone)
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#define KVM_UNREGISTER_COALESCED_MMIO \
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#define KVM_UNREGISTER_COALESCED_MMIO \
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@ -110,7 +110,7 @@ struct kvm_memory_slot {
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struct kvm_kernel_irq_routing_entry {
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struct kvm_kernel_irq_routing_entry {
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u32 gsi;
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u32 gsi;
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void (*set)(struct kvm_kernel_irq_routing_entry *e,
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int (*set)(struct kvm_kernel_irq_routing_entry *e,
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struct kvm *kvm, int level);
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struct kvm *kvm, int level);
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union {
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union {
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struct {
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struct {
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@ -352,7 +352,7 @@ void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
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struct kvm_irq_mask_notifier *kimn);
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struct kvm_irq_mask_notifier *kimn);
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void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
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void kvm_fire_mask_notifiers(struct kvm *kvm, int irq, bool mask);
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void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
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int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level);
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void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
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void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
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void kvm_register_irq_ack_notifier(struct kvm *kvm,
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void kvm_register_irq_ack_notifier(struct kvm *kvm,
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struct kvm_irq_ack_notifier *kian);
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struct kvm_irq_ack_notifier *kian);
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@ -83,19 +83,22 @@ static unsigned long ioapic_read_indirect(struct kvm_ioapic *ioapic,
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return result;
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return result;
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}
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}
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static void ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx)
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static int ioapic_service(struct kvm_ioapic *ioapic, unsigned int idx)
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{
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{
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union ioapic_redir_entry *pent;
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union ioapic_redir_entry *pent;
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int injected = -1;
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pent = &ioapic->redirtbl[idx];
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pent = &ioapic->redirtbl[idx];
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if (!pent->fields.mask) {
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if (!pent->fields.mask) {
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int injected = ioapic_deliver(ioapic, idx);
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injected = ioapic_deliver(ioapic, idx);
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if (injected && pent->fields.trig_mode == IOAPIC_LEVEL_TRIG)
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if (injected && pent->fields.trig_mode == IOAPIC_LEVEL_TRIG)
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pent->fields.remote_irr = 1;
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pent->fields.remote_irr = 1;
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}
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}
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if (!pent->fields.trig_mode)
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if (!pent->fields.trig_mode)
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ioapic->irr &= ~(1 << idx);
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ioapic->irr &= ~(1 << idx);
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return injected;
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}
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}
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static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
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static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
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@ -207,7 +210,7 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
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u8 trig_mode = ioapic->redirtbl[irq].fields.trig_mode;
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u8 trig_mode = ioapic->redirtbl[irq].fields.trig_mode;
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u32 deliver_bitmask;
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u32 deliver_bitmask;
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struct kvm_vcpu *vcpu;
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struct kvm_vcpu *vcpu;
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int vcpu_id, r = 0;
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int vcpu_id, r = -1;
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ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
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ioapic_debug("dest=%x dest_mode=%x delivery_mode=%x "
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"vector=%x trig_mode=%x\n",
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"vector=%x trig_mode=%x\n",
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@ -247,7 +250,9 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
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deliver_bitmask &= ~(1 << vcpu_id);
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deliver_bitmask &= ~(1 << vcpu_id);
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vcpu = ioapic->kvm->vcpus[vcpu_id];
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vcpu = ioapic->kvm->vcpus[vcpu_id];
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if (vcpu) {
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if (vcpu) {
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r = ioapic_inj_irq(ioapic, vcpu, vector,
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if (r < 0)
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r = 0;
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r += ioapic_inj_irq(ioapic, vcpu, vector,
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trig_mode, delivery_mode);
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trig_mode, delivery_mode);
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}
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}
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}
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}
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@ -258,8 +263,10 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
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continue;
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continue;
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deliver_bitmask &= ~(1 << vcpu_id);
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deliver_bitmask &= ~(1 << vcpu_id);
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vcpu = ioapic->kvm->vcpus[vcpu_id];
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vcpu = ioapic->kvm->vcpus[vcpu_id];
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if (vcpu)
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if (vcpu) {
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ioapic_inj_nmi(vcpu);
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ioapic_inj_nmi(vcpu);
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r = 1;
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}
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else
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else
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ioapic_debug("NMI to vcpu %d failed\n",
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ioapic_debug("NMI to vcpu %d failed\n",
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vcpu->vcpu_id);
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vcpu->vcpu_id);
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@ -273,11 +280,12 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
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return r;
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return r;
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}
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}
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void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
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int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
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{
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{
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u32 old_irr = ioapic->irr;
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u32 old_irr = ioapic->irr;
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u32 mask = 1 << irq;
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u32 mask = 1 << irq;
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union ioapic_redir_entry entry;
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union ioapic_redir_entry entry;
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int ret = 1;
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if (irq >= 0 && irq < IOAPIC_NUM_PINS) {
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if (irq >= 0 && irq < IOAPIC_NUM_PINS) {
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entry = ioapic->redirtbl[irq];
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entry = ioapic->redirtbl[irq];
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@ -288,9 +296,10 @@ void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
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ioapic->irr |= mask;
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ioapic->irr |= mask;
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if ((!entry.fields.trig_mode && old_irr != ioapic->irr)
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if ((!entry.fields.trig_mode && old_irr != ioapic->irr)
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|| !entry.fields.remote_irr)
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|| !entry.fields.remote_irr)
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ioapic_service(ioapic, irq);
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ret = ioapic_service(ioapic, irq);
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}
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}
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}
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}
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return ret;
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}
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}
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static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int pin,
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static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int pin,
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@ -83,7 +83,7 @@ struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
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unsigned long bitmap);
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unsigned long bitmap);
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void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode);
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void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode);
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int kvm_ioapic_init(struct kvm *kvm);
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int kvm_ioapic_init(struct kvm *kvm);
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void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
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int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
|
||||||
void kvm_ioapic_reset(struct kvm_ioapic *ioapic);
|
void kvm_ioapic_reset(struct kvm_ioapic *ioapic);
|
||||||
u32 kvm_ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest,
|
u32 kvm_ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest,
|
||||||
u8 dest_mode);
|
u8 dest_mode);
|
||||||
|
@ -29,22 +29,24 @@
|
|||||||
|
|
||||||
#include "ioapic.h"
|
#include "ioapic.h"
|
||||||
|
|
||||||
static void kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
|
static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
|
||||||
struct kvm *kvm, int level)
|
struct kvm *kvm, int level)
|
||||||
{
|
{
|
||||||
#ifdef CONFIG_X86
|
#ifdef CONFIG_X86
|
||||||
kvm_pic_set_irq(pic_irqchip(kvm), e->irqchip.pin, level);
|
return kvm_pic_set_irq(pic_irqchip(kvm), e->irqchip.pin, level);
|
||||||
|
#else
|
||||||
|
return -1;
|
||||||
#endif
|
#endif
|
||||||
}
|
}
|
||||||
|
|
||||||
static void kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
|
static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
|
||||||
struct kvm *kvm, int level)
|
struct kvm *kvm, int level)
|
||||||
{
|
{
|
||||||
kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level);
|
return kvm_ioapic_set_irq(kvm->arch.vioapic, e->irqchip.pin, level);
|
||||||
}
|
}
|
||||||
|
|
||||||
static void kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
|
static int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
|
||||||
struct kvm *kvm, int level)
|
struct kvm *kvm, int level)
|
||||||
{
|
{
|
||||||
int vcpu_id;
|
int vcpu_id;
|
||||||
struct kvm_vcpu *vcpu;
|
struct kvm_vcpu *vcpu;
|
||||||
@ -88,13 +90,20 @@ static void kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
|
|||||||
default:
|
default:
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
|
return 1;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* This should be called with the kvm->lock mutex held */
|
/* This should be called with the kvm->lock mutex held
|
||||||
void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
|
* Return value:
|
||||||
|
* < 0 Interrupt was ignored (masked or not delivered for other reasons)
|
||||||
|
* = 0 Interrupt was coalesced (previous irq is still pending)
|
||||||
|
* > 0 Number of CPUs interrupt was delivered to
|
||||||
|
*/
|
||||||
|
int kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
|
||||||
{
|
{
|
||||||
struct kvm_kernel_irq_routing_entry *e;
|
struct kvm_kernel_irq_routing_entry *e;
|
||||||
unsigned long *irq_state, sig_level;
|
unsigned long *irq_state, sig_level;
|
||||||
|
int ret = -1;
|
||||||
|
|
||||||
if (irq < KVM_IOAPIC_NUM_PINS) {
|
if (irq < KVM_IOAPIC_NUM_PINS) {
|
||||||
irq_state = (unsigned long *)&kvm->arch.irq_states[irq];
|
irq_state = (unsigned long *)&kvm->arch.irq_states[irq];
|
||||||
@ -113,8 +122,14 @@ void kvm_set_irq(struct kvm *kvm, int irq_source_id, int irq, int level)
|
|||||||
* writes to the unused one.
|
* writes to the unused one.
|
||||||
*/
|
*/
|
||||||
list_for_each_entry(e, &kvm->irq_routing, link)
|
list_for_each_entry(e, &kvm->irq_routing, link)
|
||||||
if (e->gsi == irq)
|
if (e->gsi == irq) {
|
||||||
e->set(e, kvm, sig_level);
|
int r = e->set(e, kvm, sig_level);
|
||||||
|
if (r < 0)
|
||||||
|
continue;
|
||||||
|
|
||||||
|
ret = r + ((ret < 0) ? 0 : ret);
|
||||||
|
}
|
||||||
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
|
void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin)
|
||||||
@ -232,7 +247,7 @@ int setup_routing_entry(struct kvm_kernel_irq_routing_entry *e,
|
|||||||
e->set = kvm_set_pic_irq;
|
e->set = kvm_set_pic_irq;
|
||||||
break;
|
break;
|
||||||
case KVM_IRQCHIP_PIC_SLAVE:
|
case KVM_IRQCHIP_PIC_SLAVE:
|
||||||
e->set = kvm_set_pic_irq;
|
e->set = kvm_set_pic_irq;
|
||||||
delta = 8;
|
delta = 8;
|
||||||
break;
|
break;
|
||||||
case KVM_IRQCHIP_IOAPIC:
|
case KVM_IRQCHIP_IOAPIC:
|
||||||
|
Loading…
Reference in New Issue
Block a user