linux-kernel - Re: [PATCH v4 5/5] ARC: [intc-*] switch to linear domain

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Date:	Mon, 18 Apr 2016 10:41:29 +0100
From:	Marc Zyngier <marc.zyngier@....com>
To:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	linux-snps-arc@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Noam Camus <noamc@...hip.com>
Subject: Re: [PATCH v4 5/5] ARC: [intc-*] switch to linear domain

On 18/04/16 07:51, Vineet Gupta wrote:
> Hi Marc,
> 
> On Wednesday 13 April 2016 05:10 PM, Vineet Gupta wrote:
>> Now that we have Timers probed from DT, don't need legacy domain
>>
>> This however requires mapping to be called explicitly for the IRQ which
>> still can't (and probably never) be probed from DT such as IPI and
>> SOFTIRQ
>>
>> Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
>> ---
>>  arch/arc/kernel/intc-arcv2.c   | 8 ++++++--
>>  arch/arc/kernel/intc-compact.c | 2 +-
>>  2 files changed, 7 insertions(+), 3 deletions(-)
>>
>> diff --git a/arch/arc/kernel/intc-arcv2.c b/arch/arc/kernel/intc-arcv2.c
>> index 592cc977151e..6c24faf48b16 100644
>> --- a/arch/arc/kernel/intc-arcv2.c
>> +++ b/arch/arc/kernel/intc-arcv2.c
>> @@ -146,8 +146,7 @@ init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
>>  	if (parent)
>>  		panic("DeviceTree incore intc not a root irq controller\n");
>>  
>> -	root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
>> -					    &arcv2_irq_ops, NULL);
>> +	root_domain = irq_domain_add_linear(intc, NR_CPU_IRQS, &arcv2_irq_ops, NULL);
>>  	if (!root_domain)
>>  		panic("root irq domain not avail\n");
>>  
>> @@ -157,6 +156,11 @@ init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
>>  	 */
>>  	irq_set_default_host(root_domain);
>>  
>> +#ifdef CONFIG_SMP
>> +	irq_create_mapping(root_domain, IPI_IRQ);
>> +#endif
>> +	irq_create_mapping(root_domain, SOFTIRQ_IRQ);
>> +
>>  	return 0;
>>  }
>>  
>> diff --git a/arch/arc/kernel/intc-compact.c b/arch/arc/kernel/intc-compact.c
>> index 48a8b24de23e..c5cceca36118 100644
>> --- a/arch/arc/kernel/intc-compact.c
>> +++ b/arch/arc/kernel/intc-compact.c
>> @@ -105,7 +105,7 @@ init_onchip_IRQ(struct device_node *intc, struct device_node *parent)
>>  	if (parent)
>>  		panic("DeviceTree incore intc not a root irq controller\n");
>>  
>> -	root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
>> +	root_domain = irq_domain_add_linear(intc, NR_CPU_IRQS,
>>  					    &arc_intc_domain_ops, NULL);
>>  	if (!root_domain)
>>  		panic("root irq domain not avail\n");
>>
> 
> Does this patch look ok to you ? Do you want to see any other improvements here.

Decoupling HW irqs from Linux irqs is a major progress, so for that:

Acked-by: Marc Zyngier <marc.zyngier@....com>

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...