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    Subject[tip: irq/core] irqchip/gic-v4.1: Plumb set_vcpu_affinity SGI callbacks
    The following commit has been merged into the irq/core branch of tip:

    Commit-ID: 05d32df13c6b3c0850b68928048536e9a736d520
    Gitweb: https://git.kernel.org/tip/05d32df13c6b3c0850b68928048536e9a736d520
    Author: Marc Zyngier <maz@kernel.org>
    AuthorDate: Wed, 04 Mar 2020 20:33:19
    Committer: Marc Zyngier <maz@kernel.org>
    CommitterDate: Tue, 24 Mar 2020 12:15:51

    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
    ---
    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 c614f0c..aae5332 100644
    --- a/drivers/irqchip/irq-gic-v3-its.c
    +++ b/drivers/irqchip/irq-gic-v3-its.c
    @@ -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,
    diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
    index 44e8c19..1b34100 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_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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