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    SubjectRe: [RFC PATCH 20/33] irqchip/gic-v3-its: Add VPE domain infrastructure
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    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@arm.com>
    Reviewed-by: Eric Auger <eric.auger@redhat.com>

    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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