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 <[email protected]> --- 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; } -- 2.1.4
