On Tue, Jul 01, 2014 at 03:45:16PM +0100, Will Deacon wrote:
> Now that we have a dynamic means to register kvm_device_ops, use that
> for the ARM VGIC, instead of relying on the static table.
>
> Cc: Gleb Natapov <[email protected]>
> Cc: Paolo Bonzini <[email protected]>
> Cc: Marc Zyngier <[email protected]>
> Cc: Christoffer Dall <[email protected]>
> Signed-off-by: Will Deacon <[email protected]>
> ---
> include/linux/kvm_host.h | 1 -
> virt/kvm/arm/vgic.c | 156
> +++++++++++++++++++++++------------------------
> virt/kvm/kvm_main.c | 4 --
> 3 files changed, 78 insertions(+), 83 deletions(-)
>
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index b75faaf0d76d..4317fdd10696 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -1088,7 +1088,6 @@ int kvm_register_device_ops(struct kvm_device_ops *ops,
> u32 type);
> extern struct kvm_device_ops kvm_mpic_ops;
> extern struct kvm_device_ops kvm_xics_ops;
> extern struct kvm_device_ops kvm_vfio_ops;
> -extern struct kvm_device_ops kvm_arm_vgic_v2_ops;
> extern struct kvm_device_ops kvm_flic_ops;
>
> #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
> diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
> index 795ab482333d..d9d0bcebad2b 100644
> --- a/virt/kvm/arm/vgic.c
> +++ b/virt/kvm/arm/vgic.c
> @@ -1502,83 +1502,6 @@ int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu)
> return 0;
> }
>
> -static void vgic_init_maintenance_interrupt(void *info)
> -{
> - enable_percpu_irq(vgic->maint_irq, 0);
> -}
> -
> -static int vgic_cpu_notify(struct notifier_block *self,
> - unsigned long action, void *cpu)
> -{
> - switch (action) {
> - case CPU_STARTING:
> - case CPU_STARTING_FROZEN:
> - vgic_init_maintenance_interrupt(NULL);
> - break;
> - case CPU_DYING:
> - case CPU_DYING_FROZEN:
> - disable_percpu_irq(vgic->maint_irq);
> - break;
> - }
> -
> - return NOTIFY_OK;
> -}
> -
> -static struct notifier_block vgic_cpu_nb = {
> - .notifier_call = vgic_cpu_notify,
> -};
> -
> -static const struct of_device_id vgic_ids[] = {
> - { .compatible = "arm,cortex-a15-gic", .data = vgic_v2_probe, },
> - { .compatible = "arm,gic-v3", .data = vgic_v3_probe, },
> - {},
> -};
> -
> -int kvm_vgic_hyp_init(void)
> -{
> - const struct of_device_id *matched_id;
> - int (*vgic_probe)(struct device_node *,const struct vgic_ops **,
> - const struct vgic_params **);
> - struct device_node *vgic_node;
> - int ret;
> -
> - vgic_node = of_find_matching_node_and_match(NULL,
> - vgic_ids, &matched_id);
> - if (!vgic_node) {
> - kvm_err("error: no compatible GIC node found\n");
> - return -ENODEV;
> - }
> -
> - vgic_probe = matched_id->data;
> - ret = vgic_probe(vgic_node, &vgic_ops, &vgic);
> - if (ret)
> - return ret;
> -
> - ret = request_percpu_irq(vgic->maint_irq, vgic_maintenance_handler,
> - "vgic", kvm_get_running_vcpus());
> - if (ret) {
> - kvm_err("Cannot register interrupt %d\n", vgic->maint_irq);
> - return ret;
> - }
> -
> - ret = __register_cpu_notifier(&vgic_cpu_nb);
> - if (ret) {
> - kvm_err("Cannot register vgic CPU notifier\n");
> - goto out_free_irq;
> - }
> -
> - on_each_cpu(vgic_init_maintenance_interrupt, NULL, 1);
> -
> - /* Callback into for arch code for setup */
> - vgic_arch_setup(vgic);
> -
> - return 0;
> -
> -out_free_irq:
> - free_percpu_irq(vgic->maint_irq, kvm_get_running_vcpus());
> - return ret;
> -}
> -
> /**
> * kvm_vgic_init - Initialize global VGIC state before running any VCPUs
> * @kvm: pointer to the kvm struct
> @@ -2042,7 +1965,7 @@ static int vgic_create(struct kvm_device *dev, u32 type)
> return kvm_vgic_create(dev->kvm);
> }
>
> -struct kvm_device_ops kvm_arm_vgic_v2_ops = {
> +static struct kvm_device_ops kvm_arm_vgic_v2_ops = {
> .name = "kvm-arm-vgic",
> .create = vgic_create,
> .destroy = vgic_destroy,
> @@ -2050,3 +1973,80 @@ struct kvm_device_ops kvm_arm_vgic_v2_ops = {
> .get_attr = vgic_get_attr,
> .has_attr = vgic_has_attr,
> };
> +
> +static void vgic_init_maintenance_interrupt(void *info)
> +{
> + enable_percpu_irq(vgic->maint_irq, 0);
> +}
> +
> +static int vgic_cpu_notify(struct notifier_block *self,
> + unsigned long action, void *cpu)
> +{
> + switch (action) {
> + case CPU_STARTING:
> + case CPU_STARTING_FROZEN:
> + vgic_init_maintenance_interrupt(NULL);
> + break;
> + case CPU_DYING:
> + case CPU_DYING_FROZEN:
> + disable_percpu_irq(vgic->maint_irq);
> + break;
> + }
> +
> + return NOTIFY_OK;
> +}
> +
> +static struct notifier_block vgic_cpu_nb = {
> + .notifier_call = vgic_cpu_notify,
> +};
> +
> +static const struct of_device_id vgic_ids[] = {
> + { .compatible = "arm,cortex-a15-gic", .data = vgic_v2_probe, },
> + { .compatible = "arm,gic-v3", .data = vgic_v3_probe, },
> + {},
> +};
> +
> +int kvm_vgic_hyp_init(void)
> +{
> + const struct of_device_id *matched_id;
> + int (*vgic_probe)(struct device_node *,const struct vgic_ops **,
> + const struct vgic_params **);
> + struct device_node *vgic_node;
> + int ret;
> +
> + vgic_node = of_find_matching_node_and_match(NULL,
> + vgic_ids, &matched_id);
> + if (!vgic_node) {
> + kvm_err("error: no compatible GIC node found\n");
> + return -ENODEV;
> + }
> +
> + vgic_probe = matched_id->data;
> + ret = vgic_probe(vgic_node, &vgic_ops, &vgic);
> + if (ret)
> + return ret;
> +
> + ret = request_percpu_irq(vgic->maint_irq, vgic_maintenance_handler,
> + "vgic", kvm_get_running_vcpus());
> + if (ret) {
> + kvm_err("Cannot register interrupt %d\n", vgic->maint_irq);
> + return ret;
> + }
> +
> + ret = __register_cpu_notifier(&vgic_cpu_nb);
> + if (ret) {
> + kvm_err("Cannot register vgic CPU notifier\n");
> + goto out_free_irq;
> + }
> +
> + on_each_cpu(vgic_init_maintenance_interrupt, NULL, 1);
> +
> + /* Callback into for arch code for setup */
> + vgic_arch_setup(vgic);
close to ridiculous nit: but I would add a newline here since the
comment doesn't really apply to the kvm_register_device_ops, but please
don't make another revision just for this.
> + return kvm_register_device_ops(&kvm_arm_vgic_v2_ops,
> + KVM_DEV_TYPE_ARM_VGIC_V2);
> +
> +out_free_irq:
> + free_percpu_irq(vgic->maint_irq, kvm_get_running_vcpus());
> + return ret;
> +}
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index a8539ae10247..7eab47222dcf 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -2271,10 +2271,6 @@ static struct kvm_device_ops
> *kvm_device_ops_table[KVM_DEV_TYPE_MAX] = {
> [KVM_DEV_TYPE_VFIO] = &kvm_vfio_ops,
> #endif
>
> -#ifdef CONFIG_KVM_ARM_VGIC
> - [KVM_DEV_TYPE_ARM_VGIC_V2] = &kvm_arm_vgic_v2_ops,
> -#endif
> -
> #ifdef CONFIG_S390
> [KVM_DEV_TYPE_FLIC] = &kvm_flic_ops,
> #endif
> --
> 2.0.0
>
Reviewed-by: Christoffer Dall <[email protected]>
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