linux-kernel - Re: [PATCH] firmware: arm_sdei: pass sdei_api_event

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Date:   Fri, 24 Sep 2021 21:34:11 +0800
From:   乱石 <zhangliguang@...ux.alibaba.com>
To:     James Morse <james.morse@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] firmware: arm_sdei: pass sdei_api_event_register right
 parameters

Hi James,

Gentle ping! Any comments on this patch?


在 2021/9/10 12:01, Liguang Zhang 写道:
> Function _local_event_enable is used for private sdei event
> registeration called by sdei_event_register. We should pass
> sdei_api_event_register right flag and mpidr parameters, otherwise atf
> may trigger assert errors.
>
> Signed-off-by: Liguang Zhang <zhangliguang@...ux.alibaba.com>
> ---
>   drivers/firmware/arm_sdei.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c
> index a7e762c352f9..0736752dadde 100644
> --- a/drivers/firmware/arm_sdei.c
> +++ b/drivers/firmware/arm_sdei.c
> @@ -558,14 +558,16 @@ static int sdei_api_event_register(u32 event_num, unsigned long entry_point,
>   static void _local_event_register(void *data)
>   {
>   	int err;
> +	u64 mpidr;
>   	struct sdei_registered_event *reg;
>   	struct sdei_crosscall_args *arg = data;
>   
>   	WARN_ON(preemptible());
>   
> +	mpidr = read_cpuid_mpidr();
>   	reg = per_cpu_ptr(arg->event->private_registered, smp_processor_id());
>   	err = sdei_api_event_register(arg->event->event_num, sdei_entry_point,
> -				      reg, 0, 0);
> +				      reg, SDEI_EVENT_REGISTER_RM_PE, mpidr);
>   
>   	sdei_cross_call_return(arg, err);
>   }