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KVM: arm/arm64: Remove kvm_vgic_vcpu_early_init

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kvm_vgic_vcpu_early_init gets called after kvm_vgic_cpu_init which
is confusing. The call path is as follows:
kvm_vm_ioctl_create_vcpu
|_ kvm_arch_cpu_create
   |_ kvm_vcpu_init
      |_ kvm_arch_vcpu_init
         |_ kvm_vgic_vcpu_init
|_ kvm_arch_vcpu_postcreate
   |_ kvm_vgic_vcpu_early_init

Static initialization currently done in kvm_vgic_vcpu_early_init()
can be moved to kvm_vgic_vcpu_init(). So let's move the code and
remove kvm_vgic_vcpu_early_init(). kvm_arch_vcpu_postcreate() does
nothing.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Eric Auger 2018-05-22 09:55:13 +02:00 committed by Marc Zyngier
parent ccc27bf5be
commit 5ec17fbac6
3 changed files with 37 additions and 45 deletions
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1
include/kvm/arm_vgic.h
View File

@ -338,7 +338,6 @@ void kvm_vgic_early_init(struct kvm *kvm);
int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu);
int kvm_vgic_create(struct kvm *kvm, u32 type);
void kvm_vgic_destroy(struct kvm *kvm);
void kvm_vgic_vcpu_early_init(struct kvm_vcpu *vcpu);
void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu);
int kvm_vgic_map_resources(struct kvm *kvm);
int kvm_vgic_hyp_init(void);

1
virt/kvm/arm/arm.c
View File

@ -292,7 +292,6 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
{
kvm_vgic_vcpu_early_init(vcpu);
}
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)

80
virt/kvm/arm/vgic/vgic-init.c
View File

@ -44,7 +44,7 @@
*
* CPU Interface:
*
* - kvm_vgic_vcpu_early_init(): initialization of static data that
* - kvm_vgic_vcpu_init(): initialization of static data that
* doesn't depend on any sizing information or emulation type. No
* allocation is allowed there.
*/
@ -67,46 +67,6 @@ void kvm_vgic_early_init(struct kvm *kvm)
spin_lock_init(&dist->lpi_list_lock);
}
/**
* kvm_vgic_vcpu_early_init() - Initialize static VGIC VCPU data structures
* @vcpu: The VCPU whose VGIC data structures whould be initialized
*
* Only do initialization, but do not actually enable the VGIC CPU interface
* yet.
*/
void kvm_vgic_vcpu_early_init(struct kvm_vcpu *vcpu)
{
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
int i;
INIT_LIST_HEAD(&vgic_cpu->ap_list_head);
spin_lock_init(&vgic_cpu->ap_list_lock);
/*
* Enable and configure all SGIs to be edge-triggered and
* configure all PPIs as level-triggered.
*/
for (i = 0; i < VGIC_NR_PRIVATE_IRQS; i++) {
struct vgic_irq *irq = &vgic_cpu->private_irqs[i];
INIT_LIST_HEAD(&irq->ap_list);
spin_lock_init(&irq->irq_lock);
irq->intid = i;
irq->vcpu = NULL;
irq->target_vcpu = vcpu;
irq->targets = 1U << vcpu->vcpu_id;
kref_init(&irq->refcount);
if (vgic_irq_is_sgi(i)) {
/* SGIs */
irq->enabled = 1;
irq->config = VGIC_CONFIG_EDGE;
} else {
/* PPIs */
irq->config = VGIC_CONFIG_LEVEL;
}
}
}
/* CREATION */
/**
@ -224,13 +184,47 @@ static int kvm_vgic_dist_init(struct kvm *kvm, unsigned int nr_spis)
}
/**
* kvm_vgic_vcpu_init() - Register VCPU-specific KVM iodevs
* kvm_vgic_vcpu_init() - Initialize static VGIC VCPU data
* structures and register VCPU-specific KVM iodevs
*
* @vcpu: pointer to the VCPU being created and initialized
*
* Only do initialization, but do not actually enable the
* VGIC CPU interface
*/
int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu)
{
int ret = 0;
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
int ret = 0;
int i;
INIT_LIST_HEAD(&vgic_cpu->ap_list_head);
spin_lock_init(&vgic_cpu->ap_list_lock);
/*
* Enable and configure all SGIs to be edge-triggered and
* configure all PPIs as level-triggered.
*/
for (i = 0; i < VGIC_NR_PRIVATE_IRQS; i++) {
struct vgic_irq *irq = &vgic_cpu->private_irqs[i];
INIT_LIST_HEAD(&irq->ap_list);
spin_lock_init(&irq->irq_lock);
irq->intid = i;
irq->vcpu = NULL;
irq->target_vcpu = vcpu;
irq->targets = 1U << vcpu->vcpu_id;
kref_init(&irq->refcount);
if (vgic_irq_is_sgi(i)) {
/* SGIs */
irq->enabled = 1;
irq->config = VGIC_CONFIG_EDGE;
} else {
/* PPIs */
irq->config = VGIC_CONFIG_LEVEL;
}
}
if (!irqchip_in_kernel(vcpu->kvm))
return 0;