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SubjectRe: [PATCH v4 09/20] irqchip/gic-v4.1: Plumb set_vcpu_affinity SGI callbacks
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Hi Marc,

On 2020/2/14 22:57, Marc Zyngier wrote:
> As for VLPIs, there is a number of configuration bits that cannot

As for vSGIs,

> be directly communicated through the normal irqchip API, and we
> have to use our good old friend set_vcpu_affinity.
>
> 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 a9753435c4ff..a2e824eae43f 100644
> --- a/drivers/irqchip/irq-gic-v3-its.c
> +++ b/drivers/irqchip/irq-gic-v3-its.c
> @@ -3969,6 +3969,23 @@ 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,
> @@ -3976,6 +3993,7 @@ 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 30b4855bf766..a1a9d40266f5 100644
> --- a/include/linux/irqchip/arm-gic-v4.h
> +++ b/include/linux/irqchip/arm-gic-v4.h
> @@ -98,6 +98,7 @@ enum its_vcpu_info_cmd_type {
> SCHEDULE_VPE,
> DESCHEDULE_VPE,
> INVALL_VPE,
> + PROP_UPDATE_SGI,

Maybe better to use 'PROP_UPDATE_VSGI'?


Thanks,
Zenghui

> };
>
> struct its_cmd_info {
> @@ -110,6 +111,10 @@ struct its_cmd_info {
> bool g0en;
> bool g1en;
> };
> + struct {
> + u8 priority;
> + bool group;
> + };
> };
> };
>
>

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