From e8cde0939d8ebe9c8ebe5a4bdf71af51a0d56053 Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Mon, 15 Apr 2013 23:23:21 +0200 Subject: [PATCH] KVM: Move irq routing setup to irqchip.c Setting up IRQ routes is nothing IOAPIC specific. Extract everything that really is generic code into irqchip.c and only leave the ioapic specific bits to irq_comm.c. Signed-off-by: Alexander Graf Acked-by: Michael S. Tsirkin --- include/linux/kvm_host.h | 3 ++ virt/kvm/irq_comm.c | 76 ++--------------------------------- virt/kvm/irqchip.c | 85 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 91 insertions(+), 73 deletions(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index a7bfe9d3aa5e..dcef724f4ba6 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -961,6 +961,9 @@ int kvm_set_irq_routing(struct kvm *kvm, const struct kvm_irq_routing_entry *entries, unsigned nr, unsigned flags); +int kvm_set_routing_entry(struct kvm_irq_routing_table *rt, + struct kvm_kernel_irq_routing_entry *e, + const struct kvm_irq_routing_entry *ue); void kvm_free_irq_routing(struct kvm *kvm); int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index d5008f4aade7..e2e6b4473a96 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -271,27 +271,14 @@ void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin, rcu_read_unlock(); } -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) +int kvm_set_routing_entry(struct kvm_irq_routing_table *rt, + struct kvm_kernel_irq_routing_entry *e, + const struct kvm_irq_routing_entry *ue) { int r = -EINVAL; int delta; unsigned max_pin; - struct kvm_kernel_irq_routing_entry *ei; - /* - * Do not allow GSI to be mapped to the same irqchip more than once. - * Allow only one to one mapping between GSI and MSI. - */ - hlist_for_each_entry(ei, &rt->map[ue->gsi], link) - if (ei->type == KVM_IRQ_ROUTING_MSI || - ue->type == KVM_IRQ_ROUTING_MSI || - ue->u.irqchip.irqchip == ei->irqchip.irqchip) - return r; - - e->gsi = ue->gsi; - e->type = ue->type; switch (ue->type) { case KVM_IRQ_ROUTING_IRQCHIP: delta = 0; @@ -328,68 +315,11 @@ static int setup_routing_entry(struct kvm_irq_routing_table *rt, goto out; } - hlist_add_head(&e->link, &rt->map[e->gsi]); r = 0; out: return r; } -int kvm_set_irq_routing(struct kvm *kvm, - const struct kvm_irq_routing_entry *ue, - unsigned nr, - unsigned flags) -{ - struct kvm_irq_routing_table *new, *old; - u32 i, j, nr_rt_entries = 0; - int r; - - for (i = 0; i < nr; ++i) { - if (ue[i].gsi >= KVM_MAX_IRQ_ROUTES) - return -EINVAL; - nr_rt_entries = max(nr_rt_entries, ue[i].gsi); - } - - nr_rt_entries += 1; - - new = kzalloc(sizeof(*new) + (nr_rt_entries * sizeof(struct hlist_head)) - + (nr * sizeof(struct kvm_kernel_irq_routing_entry)), - GFP_KERNEL); - - if (!new) - return -ENOMEM; - - new->rt_entries = (void *)&new->map[nr_rt_entries]; - - new->nr_rt_entries = nr_rt_entries; - for (i = 0; i < 3; i++) - for (j = 0; j < KVM_IRQCHIP_NUM_PINS; j++) - new->chip[i][j] = -1; - - for (i = 0; i < nr; ++i) { - r = -EINVAL; - if (ue->flags) - goto out; - r = setup_routing_entry(new, &new->rt_entries[i], ue); - if (r) - goto out; - ++ue; - } - - mutex_lock(&kvm->irq_lock); - old = kvm->irq_routing; - kvm_irq_routing_update(kvm, new); - mutex_unlock(&kvm->irq_lock); - - synchronize_rcu(); - - new = old; - r = 0; - -out: - kfree(new); - return r; -} - #define IOAPIC_ROUTING_ENTRY(irq) \ { .gsi = irq, .type = KVM_IRQ_ROUTING_IRQCHIP, \ .u.irqchip.irqchip = KVM_IRQCHIP_IOAPIC, .u.irqchip.pin = (irq) } diff --git a/virt/kvm/irqchip.c b/virt/kvm/irqchip.c index 12f7f26af4f8..20dc9e4a8f6c 100644 --- a/virt/kvm/irqchip.c +++ b/virt/kvm/irqchip.c @@ -150,3 +150,88 @@ void kvm_free_irq_routing(struct kvm *kvm) 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) +{ + int r = -EINVAL; + struct kvm_kernel_irq_routing_entry *ei; + + /* + * Do not allow GSI to be mapped to the same irqchip more than once. + * Allow only one to one mapping between GSI and MSI. + */ + hlist_for_each_entry(ei, &rt->map[ue->gsi], link) + if (ei->type == KVM_IRQ_ROUTING_MSI || + ue->type == KVM_IRQ_ROUTING_MSI || + ue->u.irqchip.irqchip == ei->irqchip.irqchip) + return r; + + e->gsi = ue->gsi; + e->type = ue->type; + r = kvm_set_routing_entry(rt, e, ue); + if (r) + goto out; + + hlist_add_head(&e->link, &rt->map[e->gsi]); + r = 0; +out: + return r; +} + +int kvm_set_irq_routing(struct kvm *kvm, + const struct kvm_irq_routing_entry *ue, + unsigned nr, + unsigned flags) +{ + struct kvm_irq_routing_table *new, *old; + u32 i, j, nr_rt_entries = 0; + int r; + + for (i = 0; i < nr; ++i) { + if (ue[i].gsi >= KVM_MAX_IRQ_ROUTES) + return -EINVAL; + nr_rt_entries = max(nr_rt_entries, ue[i].gsi); + } + + nr_rt_entries += 1; + + new = kzalloc(sizeof(*new) + (nr_rt_entries * sizeof(struct hlist_head)) + + (nr * sizeof(struct kvm_kernel_irq_routing_entry)), + GFP_KERNEL); + + if (!new) + return -ENOMEM; + + new->rt_entries = (void *)&new->map[nr_rt_entries]; + + new->nr_rt_entries = nr_rt_entries; + for (i = 0; i < KVM_NR_IRQCHIPS; i++) + for (j = 0; j < KVM_IRQCHIP_NUM_PINS; j++) + new->chip[i][j] = -1; + + for (i = 0; i < nr; ++i) { + r = -EINVAL; + if (ue->flags) + goto out; + r = setup_routing_entry(new, &new->rt_entries[i], ue); + if (r) + goto out; + ++ue; + } + + mutex_lock(&kvm->irq_lock); + old = kvm->irq_routing; + kvm_irq_routing_update(kvm, new); + mutex_unlock(&kvm->irq_lock); + + synchronize_rcu(); + + new = old; + r = 0; + +out: + kfree(new); + return r; +} -- 2.39.5