diff options
| author | Paul Mackerras <paulus@samba.org> | 2014-06-30 14:51:11 +0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-08-05 16:26:20 +0400 |
| commit | 9957c86d659a4d5a2bed25ccbd3bfc9c3f25e658 (patch) | |
| tree | 27bd3fc644da983d63e34bb1ed54c8dcdab5fe0d /virt/kvm/irq_comm.c | |
| parent | 8ba918d488caded2c4368b0b922eb905fe3bb101 (diff) | |
| download | linux-9957c86d659a4d5a2bed25ccbd3bfc9c3f25e658.tar.xz | |
KVM: Move all accesses to kvm::irq_routing into irqchip.c
Now that struct _irqfd does not keep a reference to storage pointed
to by the irq_routing field of struct kvm, we can move the statement
that updates it out from under the irqfds.lock and put it in
kvm_set_irq_routing() instead. That means we then have to take a
srcu_read_lock on kvm->irq_srcu around the irqfd_update call in
kvm_irqfd_assign(), since holding the kvm->irqfds.lock no longer
ensures that that the routing can't change.
Combined with changing kvm_irq_map_gsi() and kvm_irq_map_chip_pin()
to take a struct kvm * argument instead of the pointer to the routing
table, this allows us to to move all references to kvm->irq_routing
into irqchip.c. That in turn allows us to move the definition of the
kvm_irq_routing_table struct into irqchip.c as well.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Tested-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt/kvm/irq_comm.c')
| -rw-r--r-- | virt/kvm/irq_comm.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 175844593243..963b8995a9e8 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -163,7 +163,6 @@ int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level) struct kvm_kernel_irq_routing_entry entries[KVM_NR_IRQCHIPS]; struct kvm_kernel_irq_routing_entry *e; int ret = -EINVAL; - struct kvm_irq_routing_table *irq_rt; int idx; trace_kvm_set_irq(irq, level, irq_source_id); @@ -177,8 +176,7 @@ int kvm_set_irq_inatomic(struct kvm *kvm, int irq_source_id, u32 irq, int level) * which is limited to 1:1 GSI mapping. */ idx = srcu_read_lock(&kvm->irq_srcu); - irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu); - if (kvm_irq_map_gsi(entries, irq_rt, irq) > 0) { + if (kvm_irq_map_gsi(kvm, entries, irq) > 0) { e = &entries[0]; if (likely(e->type == KVM_IRQ_ROUTING_MSI)) ret = kvm_set_msi_inatomic(e, kvm); @@ -264,7 +262,7 @@ void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, int idx, gsi; idx = srcu_read_lock(&kvm->irq_srcu); - gsi = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu)->chip[irqchip][pin]; + gsi = kvm_irq_map_chip_pin(kvm, irqchip, pin); if (gsi != -1) hlist_for_each_entry_rcu(kimn, &kvm->mask_notifier_list, link) if (kimn->irq == gsi) |