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KVM: Move more code under CONFIG_HAVE_KVM_IRQFD 

Commits e4d57e1ee1 (KVM: Move irq notifier implementation into
eventfd.c, 2014-06-30) included the irq notifier code unconditionally
in eventfd.c, while it was under CONFIG_HAVE_KVM_IRQCHIP before.

Similarly, commit 297e21053a (KVM: Give IRQFD its own separate enabling
Kconfig option, 2014-06-30) moved code from CONFIG_HAVE_IRQ_ROUTING
to CONFIG_HAVE_KVM_IRQFD but forgot to move the pieces that used to be
under CONFIG_HAVE_KVM_IRQCHIP.

Together, this broke compilation without CONFIG_KVM_XICS.  Fix by adding
or changing the #ifdefs so that they point at CONFIG_HAVE_KVM_IRQFD.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
hifive-unleashed-5.1
Paolo Bonzini 2014-08-06 14:24:45 +02:00
parent 56cc2406d6
commit c77dcacb39
4 changed files with 69 additions and 65 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/kvm_host.h
View File

@ -388,6 +388,8 @@ struct kvm {
*/
struct kvm_irq_routing_table __rcu *irq_routing;
struct hlist_head mask_notifier_list;
#endif
#ifdef CONFIG_HAVE_KVM_IRQFD
struct hlist_head irq_ack_notifier_list;
#endif

8
include/trace/events/kvm.h
View File

@ -37,7 +37,7 @@ TRACE_EVENT(kvm_userspace_exit,
__entry->errno < 0 ? -__entry->errno : __entry->reason)
);
#if defined(CONFIG_HAVE_KVM_IRQCHIP)
#if defined(CONFIG_HAVE_KVM_IRQFD)
TRACE_EVENT(kvm_set_irq,
TP_PROTO(unsigned int gsi, int level, int irq_source_id),
TP_ARGS(gsi, level, irq_source_id),
@ -57,7 +57,7 @@ TRACE_EVENT(kvm_set_irq,
TP_printk("gsi %u level %d source %d",
__entry->gsi, __entry->level, __entry->irq_source_id)
);
#endif
#endif /* defined(CONFIG_HAVE_KVM_IRQFD) */
#if defined(__KVM_HAVE_IOAPIC)
#define kvm_deliver_mode \
@ -124,7 +124,7 @@ TRACE_EVENT(kvm_msi_set_irq,
#endif /* defined(__KVM_HAVE_IOAPIC) */
#if defined(CONFIG_HAVE_KVM_IRQCHIP)
#if defined(CONFIG_HAVE_KVM_IRQFD)
TRACE_EVENT(kvm_ack_irq,
TP_PROTO(unsigned int irqchip, unsigned int pin),
@ -149,7 +149,7 @@ TRACE_EVENT(kvm_ack_irq,
#endif
);
#endif /* defined(CONFIG_HAVE_KVM_IRQCHIP) */
#endif /* defined(CONFIG_HAVE_KVM_IRQFD) */

122
virt/kvm/eventfd.c
View File

@ -445,6 +445,67 @@ out:
kfree(irqfd);
return ret;
}
bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin)
{
struct kvm_irq_ack_notifier *kian;
int gsi, idx;
idx = srcu_read_lock(&kvm->irq_srcu);
gsi = kvm_irq_map_chip_pin(kvm, irqchip, pin);
if (gsi != -1)
hlist_for_each_entry_rcu(kian, &kvm->irq_ack_notifier_list,
link)
if (kian->gsi == gsi) {
srcu_read_unlock(&kvm->irq_srcu, idx);
return true;
}
srcu_read_unlock(&kvm->irq_srcu, idx);
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, idx;
trace_kvm_ack_irq(irqchip, pin);
idx = srcu_read_lock(&kvm->irq_srcu);
gsi = kvm_irq_map_chip_pin(kvm, 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);
srcu_read_unlock(&kvm->irq_srcu, idx);
}
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);
#ifdef __KVM_HAVE_IOAPIC
kvm_vcpu_request_scan_ioapic(kvm);
#endif
}
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_srcu(&kvm->irq_srcu);
#ifdef __KVM_HAVE_IOAPIC
kvm_vcpu_request_scan_ioapic(kvm);
#endif
}
#endif
void
@ -867,64 +928,3 @@ kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
return kvm_assign_ioeventfd(kvm, args);
}
bool kvm_irq_has_notifier(struct kvm *kvm, unsigned irqchip, unsigned pin)
{
struct kvm_irq_ack_notifier *kian;
int gsi, idx;
idx = srcu_read_lock(&kvm->irq_srcu);
gsi = kvm_irq_map_chip_pin(kvm, irqchip, pin);
if (gsi != -1)
hlist_for_each_entry_rcu(kian, &kvm->irq_ack_notifier_list,
link)
if (kian->gsi == gsi) {
srcu_read_unlock(&kvm->irq_srcu, idx);
return true;
}
srcu_read_unlock(&kvm->irq_srcu, idx);
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, idx;
trace_kvm_ack_irq(irqchip, pin);
idx = srcu_read_lock(&kvm->irq_srcu);
gsi = kvm_irq_map_chip_pin(kvm, 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);
srcu_read_unlock(&kvm->irq_srcu, idx);
}
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);
#ifdef __KVM_HAVE_IOAPIC
kvm_vcpu_request_scan_ioapic(kvm);
#endif
}
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_srcu(&kvm->irq_srcu);
#ifdef __KVM_HAVE_IOAPIC
kvm_vcpu_request_scan_ioapic(kvm);
#endif
}

2
virt/kvm/kvm_main.c
View File

@ -465,6 +465,8 @@ static struct kvm *kvm_create_vm(unsigned long type)
#ifdef CONFIG_HAVE_KVM_IRQCHIP
INIT_HLIST_HEAD(&kvm->mask_notifier_list);
#endif
#ifdef CONFIG_HAVE_KVM_IRQFD
INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list);
#endif