Commit 05d32df1 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

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: default avatarMarc Zyngier <maz@kernel.org>
Reviewed-by: default avatarZenghui Yu <yuzenghui@huawei.com>
Reviewed-by: default avatarEric Auger <eric.auger@redhat.com>
Link: https://lore.kernel.org/r/20200304203330.4967-13-maz@kernel.org
parent 7017ff0e

drivers/irqchip/irq-gic-v3-its.c

+18 −0
Original line number Diff line number Diff line
@@ -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,

include/linux/irqchip/arm-gic-v4.h

+5 −0
Original line number Diff line number Diff line
@@ -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;

		};

	};

};

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