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irqchip/gic-v4.1: Plumb set_vcpu_affinity SGI callbacks 

Just like for vLPIs, there is some configuration information that cannot
be directly communicated through the normal irqchip API, and we have to
use our good old friend set_vcpu_affinity as a side-band communication
mechanism.

This is used to configure group and priority for a given vSGI.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20200304203330.4967-13-maz@kernel.org
alistair/sensors
Marc Zyngier 2020-03-04 20:33:19 +00:00
parent 7017ff0ee1
commit 05d32df13c
2 changed files with 23 additions and 0 deletions
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18
drivers/irqchip/irq-gic-v3-its.c
View File

@ -4047,6 +4047,23 @@ out:
return 0;
}
static int its_sgi_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
{
struct its_vpe *vpe = irq_data_get_irq_chip_data(d);
struct its_cmd_info *info = vcpu_info;
switch (info->cmd_type) {
case PROP_UPDATE_VSGI:
vpe->sgi_config[d->hwirq].priority = info->priority;
vpe->sgi_config[d->hwirq].group = info->group;
its_configure_sgi(d, false);
return 0;
default:
return -EINVAL;
}
}
static struct irq_chip its_sgi_irq_chip = {
.name = "GICv4.1-sgi",
.irq_mask = its_sgi_mask_irq,
@ -4054,6 +4071,7 @@ static struct irq_chip its_sgi_irq_chip = {
.irq_set_affinity = its_sgi_set_affinity,
.irq_set_irqchip_state = its_sgi_set_irqchip_state,
.irq_get_irqchip_state = its_sgi_get_irqchip_state,
.irq_set_vcpu_affinity = its_sgi_set_vcpu_affinity,
};
static int its_sgi_irq_domain_alloc(struct irq_domain *domain,

5
include/linux/irqchip/arm-gic-v4.h
View File

@ -103,6 +103,7 @@ enum its_vcpu_info_cmd_type {
SCHEDULE_VPE,
DESCHEDULE_VPE,
INVALL_VPE,
PROP_UPDATE_VSGI,
};
struct its_cmd_info {
@ -115,6 +116,10 @@ struct its_cmd_info {
bool g0en;
bool g1en;
};
struct {
u8 priority;
bool group;
};
};
};