From c8eb3f6b9bc31abc0ab3230737fde1639c8b1ea6 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Wed, 13 Apr 2016 11:49:07 +0100 Subject: KVM: arm/arm64: vgic: Remove irq_phys_map from interface Now that the virtual arch timer does not care about the irq_phys_map anymore, let's rework kvm_vgic_map_phys_irq() to return an error value instead. Any reference to that mapping can later be done by passing the correct combination of VCPU and virtual IRQ number. This makes the irq_phys_map handling completely private to the VGIC code. Signed-off-by: Andre Przywara Reviewed-by: Eric Auger Reviewed-by: Christoffer Dall --- virt/kvm/arm/arch_timer.c | 7 +------ virt/kvm/arm/vgic.c | 15 +++++++-------- 2 files changed, 8 insertions(+), 14 deletions(-) (limited to 'virt') diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c index 458d4d8ce795..3232105e6afd 100644 --- a/virt/kvm/arm/arch_timer.c +++ b/virt/kvm/arm/arch_timer.c @@ -333,7 +333,6 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, const struct kvm_irq_level *irq) { struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu; - struct irq_phys_map *map; struct irq_desc *desc; struct irq_data *data; int phys_irq; @@ -374,11 +373,7 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, * Tell the VGIC that the virtual interrupt is tied to a * physical interrupt. We do that once per VCPU. */ - map = kvm_vgic_map_phys_irq(vcpu, irq->irq, phys_irq); - if (WARN_ON(IS_ERR(map))) - return PTR_ERR(map); - - return 0; + return kvm_vgic_map_phys_irq(vcpu, irq->irq, phys_irq); } void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index a7e496abfca2..91d42a8a5f72 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -1719,21 +1719,20 @@ static struct list_head *vgic_get_irq_phys_map_list(struct kvm_vcpu *vcpu, * the physical interrupt represented by @phys_irq. This mapping can be * established multiple times as long as the parameters are the same. * - * Returns a valid pointer on success, and an error pointer otherwise + * Returns 0 on success or an error value otherwise. */ -struct irq_phys_map *kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, - int virt_irq, int phys_irq) +int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, int virt_irq, int phys_irq) { struct vgic_dist *dist = &vcpu->kvm->arch.vgic; struct list_head *root = vgic_get_irq_phys_map_list(vcpu, virt_irq); struct irq_phys_map *map; struct irq_phys_map_entry *entry; - + int ret = 0; /* Create a new mapping */ entry = kzalloc(sizeof(*entry), GFP_KERNEL); if (!entry) - return ERR_PTR(-ENOMEM); + return -ENOMEM; spin_lock(&dist->irq_phys_map_lock); @@ -1742,7 +1741,7 @@ struct irq_phys_map *kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, if (map) { /* Make sure this mapping matches */ if (map->phys_irq != phys_irq) - map = ERR_PTR(-EINVAL); + ret = -EINVAL; /* Found an existing, valid mapping */ goto out; @@ -1758,9 +1757,9 @@ out: spin_unlock(&dist->irq_phys_map_lock); /* If we've found a hit in the existing list, free the useless * entry */ - if (IS_ERR(map) || map != &entry->map) + if (ret || map != &entry->map) kfree(entry); - return map; + return ret; } static struct irq_phys_map *vgic_irq_map_search(struct kvm_vcpu *vcpu, -- cgit v1.2.3