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>
---
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
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