[PATCH v5 12/23] irqchip/gic-v4.1: Plumb set_vcpu_affinity SGI callbacks

Marc Zyngier
2020-03-04T20:36:32Z

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>
---
drivers/irqchip/irq-gic-v3-its.c | 18 ++++++++++++++++++
include/linux/irqchip/arm-gic-v4.h | 5 +++++
2 files changed, 23 insertions(+)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index fb2b836c31ff..effb0e0b0c9d 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -4033,6 +4033,23 @@ static int its_sgi_get_irqchip_state(struct irq_data *d,
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_SGI:
+ 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,
@@ -4040,6 +4057,7 @@ 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,
diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
index 44e8c19e3d56..b4dbf899460b 100644
--- a/include/linux/irqchip/arm-gic-v4.h
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -103,6 +103,7 @@ enum its_vcpu_info_cmd_type {
SCHEDULE_VPE,
DESCHEDULE_VPE,
INVALL_VPE,
+ PROP_UPDATE_SGI,
};

struct its_cmd_info {
@@ -115,6 +116,10 @@ struct its_cmd_info {
bool g0en;
bool g1en;
};
+ struct {
+ u8 priority;
+ bool group;
+ };
};
};

--
2.20.1