diff options
author | Alexander Graf <agraf@suse.de> | 2013-04-15 23:04:10 +0200 |
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committer | Alexander Graf <agraf@suse.de> | 2013-04-26 20:27:17 +0200 |
commit | 1c9f8520bda73c07fed9bcdb307854b45a3a60c4 (patch) | |
tree | c9cdfb21218b33982781d0dadb2e4455a14c0ca4 /virt/kvm/irq_comm.c | |
parent | aa8d5944b8b2809e574581abbf41894089b7def2 (diff) | |
download | linux-stable-1c9f8520bda73c07fed9bcdb307854b45a3a60c4.tar.gz linux-stable-1c9f8520bda73c07fed9bcdb307854b45a3a60c4.tar.bz2 linux-stable-1c9f8520bda73c07fed9bcdb307854b45a3a60c4.zip |
KVM: Extract generic irqchip logic into irqchip.c
The current irq_comm.c file contains pieces of code that are generic
across different irqchip implementations, as well as code that is
fully IOAPIC specific.
Split the generic bits out into irqchip.c.
Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'virt/kvm/irq_comm.c')
-rw-r--r-- | virt/kvm/irq_comm.c | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 7c0071de9e85..d5008f4aade7 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -151,59 +151,6 @@ static int kvm_set_msi_inatomic(struct kvm_kernel_irq_routing_entry *e, return -EWOULDBLOCK; } -int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi) -{ - struct kvm_kernel_irq_routing_entry route; - - if (!irqchip_in_kernel(kvm) || msi->flags != 0) - return -EINVAL; - - route.msi.address_lo = msi->address_lo; - route.msi.address_hi = msi->address_hi; - route.msi.data = msi->data; - - return kvm_set_msi(&route, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1, false); -} - -/* - * 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, u32 irq, int level, - bool line_status) -{ - struct kvm_kernel_irq_routing_entry *e, irq_set[KVM_NR_IRQCHIPS]; - int ret = -1, i = 0; - struct kvm_irq_routing_table *irq_rt; - - trace_kvm_set_irq(irq, level, irq_source_id); - - /* Not possible to detect if the guest uses the PIC or the - * IOAPIC. So set the bit in both. The guest will ignore - * writes to the unused one. - */ - rcu_read_lock(); - irq_rt = rcu_dereference(kvm->irq_routing); - if (irq < irq_rt->nr_rt_entries) - hlist_for_each_entry(e, &irq_rt->map[irq], link) - irq_set[i++] = *e; - rcu_read_unlock(); - - while(i--) { - int r; - r = irq_set[i].set(&irq_set[i], kvm, irq_source_id, level, - line_status); - if (r < 0) - continue; - - ret = r + ((ret < 0) ? 0 : ret); - } - - return ret; -} - /* * Deliver an IRQ in an atomic context if we can, or return a failure, * user can retry in a process context. @@ -241,63 +188,6 @@ int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level) return ret; } -bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin) -{ - struct kvm_irq_ack_notifier *kian; - int gsi; - - rcu_read_lock(); - gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin]; - if (gsi != -1) - hlist_for_each_entry_rcu(kian, &kvm->irq_ack_notifier_list, - link) - if (kian->gsi == gsi) { - rcu_read_unlock(); - return true; - } - - rcu_read_unlock(); - - return false; -} -EXPORT_SYMBOL_GPL(kvm_irq_has_notifier); - -void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin) -{ - struct kvm_irq_ack_notifier *kian; - int gsi; - - trace_kvm_ack_irq(irqchip, pin); - - rcu_read_lock(); - gsi = rcu_dereference(kvm->irq_routing)->chip[irqchip][pin]; - if (gsi != -1) - hlist_for_each_entry_rcu(kian, &kvm->irq_ack_notifier_list, - link) - if (kian->gsi == gsi) - kian->irq_acked(kian); - rcu_read_unlock(); -} - -void kvm_register_irq_ack_notifier(struct kvm *kvm, - struct kvm_irq_ack_notifier *kian) -{ - mutex_lock(&kvm->irq_lock); - hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list); - mutex_unlock(&kvm->irq_lock); - kvm_vcpu_request_scan_ioapic(kvm); -} - -void kvm_unregister_irq_ack_notifier(struct kvm *kvm, - struct kvm_irq_ack_notifier *kian) -{ - mutex_lock(&kvm->irq_lock); - hlist_del_init_rcu(&kian->link); - mutex_unlock(&kvm->irq_lock); - synchronize_rcu(); - kvm_vcpu_request_scan_ioapic(kvm); -} - int kvm_request_irq_source_id(struct kvm *kvm) { unsigned long *bitmap = &kvm->arch.irq_sources_bitmap; @@ -381,13 +271,6 @@ void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, rcu_read_unlock(); } -void kvm_free_irq_routing(struct kvm *kvm) -{ - /* Called only during vm destruction. Nobody can use the pointer - at this stage */ - kfree(kvm->irq_routing); -} - static int setup_routing_entry(struct kvm_irq_routing_table *rt, struct kvm_kernel_irq_routing_entry *e, const struct kvm_irq_routing_entry *ue) @@ -451,7 +334,6 @@ out: return r; } - int kvm_set_irq_routing(struct kvm *kvm, const struct kvm_irq_routing_entry *ue, unsigned nr, |