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irqchip/gic-v3-its: Add VPE domain infrastructure

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Add the basic GICv4 VPE (vcpu in GICv4 parlance) infrastructure
(irqchip, irq domain) that is going to be populated in the following
patches.

Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2016-12-20 13:41:55 +00:00
parent 015ec0386a
commit 8fff27aec1
1 changed files with 30 additions and 1 deletions
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31
drivers/irqchip/irq-gic-v3-its.c
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@ -2032,6 +2032,13 @@ 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 */
@ -2148,6 +2155,11 @@ static int its_init_domain(struct fwnode_handle *handle, struct its_node *its)
return 0;
}
static int its_init_vpe_domain(void)
{
return 0;
}
static int __init its_compute_its_list_map(struct resource *res,
void __iomem *its_base)
{
@ -2490,6 +2502,9 @@ 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;
int err;
its_parent = parent_domain;
of_node = to_of_node(handle);
@ -2504,5 +2519,19 @@ int __init its_init(struct fwnode_handle *handle, struct rdists *rdists,
}
gic_rdists = rdists;
return its_alloc_lpi_tables();
err = its_alloc_lpi_tables();
if (err)
return err;
list_for_each_entry(its, &its_nodes, entry)
has_v4 |= its->is_v4;
if (has_v4 & rdists->has_vlpis) {
if (its_init_vpe_domain()) {
rdists->has_vlpis = false;
pr_err("ITS: Disabling GICv4 support\n");
}
}
return 0;
}