Commit c8eb3f6b authored by Andre Przywara's avatar Andre Przywara Committed by Christoffer Dall
Browse files

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: default avatarAndre Przywara <andre.przywara@arm.com>
Reviewed-by: default avatarEric Auger <eric.auger@linaro.org>
Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
parent a7e33ad9

include/kvm/arm_vgic.h

+1 −2
Original line number Diff line number Diff line
@@ -344,8 +344,7 @@ int kvm_vgic_inject_mapped_irq(struct kvm *kvm, int cpuid, 
			       unsigned int virt_irq, bool level);

void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg);

int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu);

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);

int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int virt_irq);

bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int virt_irq);

virt/kvm/arm/arch_timer.c

+1 −6
Original line number Diff line number Diff line
@@ -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)

virt/kvm/arm/vgic.c

+7 −8
Original line number Diff line number Diff line
@@ -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,

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