linux-kernel - Re: [RFC PATCH 17/33] irqchip/gic-v3-its: Add VLPI configuration hook

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Date:   Mon, 13 Feb 2017 17:07:18 -0600
From:   Shanker Donthineni <shankerd@...eaurora.org>
To:     Marc Zyngier <marc.zyngier@....com>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>
Subject: Re: [RFC PATCH 17/33] irqchip/gic-v3-its: Add VLPI configuration hook



On 01/17/2017 04:20 AM, Marc Zyngier wrote:
> Add the skeleton irq_set_vcpu_affinity method that will be used
> to configure VLPIs.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@....com>
> ---
>   drivers/irqchip/irq-gic-v3-its.c | 33 +++++++++++++++++++++++++++++++++
>   1 file changed, 33 insertions(+)
>
> diff --git a/drivers/irqchip/irq-gic-v3-its.c
> b/drivers/irqchip/irq-gic-v3-its.c
> index 0dbc8b0..1bd78ca 100644
> --- a/drivers/irqchip/irq-gic-v3-its.c
> +++ b/drivers/irqchip/irq-gic-v3-its.c
> @@ -36,6 +36,7 @@
>   
>   #include <linux/irqchip.h>
>   #include <linux/irqchip/arm-gic-v3.h>
> +#include <linux/irqchip/arm-gic-v4.h>
>   
>   #include <asm/cputype.h>
>   #include <asm/exception.h>
> @@ -771,6 +772,37 @@ static int its_irq_set_irqchip_state(struct irq_data
> *d,
>   	return 0;
>   }
>   
> +static int its_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu_info)
> +{
> +	struct its_device *its_dev = irq_data_get_irq_chip_data(d);
> +	struct its_cmd_info *info = vcpu_info;
> +	u32 event = its_get_event_id(d);
> +
> +	/* Need a v4 ITS */
> +	if (!its_dev->its->is_v4 || !info)
> +		return -EINVAL;
> +
> +	switch (info->cmd_type) {
> +	case MAP_VLPI:
> +	{
> +		return 0;
> +	}
> +
> +	case UNMAP_VLPI:
> +	{
> +		return 0;
> +	}
> +
> +	case PROP_UPDATE_VLPI:
> +	{
> +		return 0;
> +	}
> +
> +	default:
> +		return -EINVAL;
> +	}
Missing a return statement.

-- 
Shanker Donthineni
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.