Hi,
On 17/01/2017 11:20, Marc Zyngier wrote:
> Add the basic GICv4 VPE (vcpu in GICv4 parlance) infrastructure
> (irqchip, irq domain) that is going to be populated in the following
> patches.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
Reviewed-by: Eric Auger <eric.auger@xxxxxxxxxx>
Eric
> ---
> drivers/irqchip/irq-gic-v3-its.c | 36 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
> index 6931018..ddd8096 100644
> --- a/drivers/irqchip/irq-gic-v3-its.c
> +++ b/drivers/irqchip/irq-gic-v3-its.c
> @@ -1918,6 +1918,13 @@ static const struct irq_domain_ops its_domain_ops = {
> .deactivate = its_irq_domain_deactivate,
> };
>
> +static struct irq_chip its_vpe_irq_chip = {
> + .name = "GICv4-vpe",
> +};
> +
> +static const struct irq_domain_ops its_vpe_domain_ops = {
> +};
> +
> static int its_force_quiescent(void __iomem *base)
> {
> u32 count = 1000000; /* 1s */
> @@ -2017,6 +2024,27 @@ static int its_init_domain(struct fwnode_handle *handle, struct its_node *its)
> return 0;
> }
>
> +static struct irq_domain *its_init_vpe_domain(void)
> +{
> + struct fwnode_handle *handle;
> + struct irq_domain *domain;
> +
> + handle = irq_domain_alloc_fwnode("VPE domain");
> + if (!handle)
> + return NULL;
> +
> + domain = irq_domain_create_tree(handle, &its_vpe_domain_ops, NULL);
> + if (!domain) {
> + kfree(handle);
> + return NULL;
> + }
> +
> + domain->parent = its_parent;
> + domain->bus_token = DOMAIN_BUS_NEXUS;
> +
> + return domain;
> +}
> +
> static int __init its_probe_one(struct resource *res,
> struct fwnode_handle *handle, int numa_node)
> {
> @@ -2266,6 +2294,8 @@ int __init its_init(struct fwnode_handle *handle, struct rdists *rdists,
> struct irq_domain *parent_domain)
> {
> struct device_node *of_node;
> + struct its_node *its;
> + bool has_v4 = false;
>
> its_parent = parent_domain;
> of_node = to_of_node(handle);
> @@ -2283,5 +2313,11 @@ int __init its_init(struct fwnode_handle *handle, struct rdists *rdists,
> its_alloc_lpi_tables();
> its_lpi_init(rdists->id_bits);
>
> + list_for_each_entry(its, &its_nodes, entry)
> + has_v4 |= its->is_v4;
> +
> + if (has_v4 & rdists->has_vlpis)
> + its_init_vpe_domain();
> +
> return 0;
> }
>
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