linux-kernel - Re: [PATCH v3 2/9] clocksource: arm_arch_timer: Extend arch_timer_kvm

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Message-ID: <56DFBA08.7060000@arm.com>
Date:	Wed, 9 Mar 2016 12:52:08 +0700
From:	Julien Grall <julien.grall@....com>
To:	Christoffer Dall <christoffer.dall@...aro.org>
Cc:	kvmarm@...ts.cs.columbia.edu, marc.zyngier@....com,
	fu.wei@...aro.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	wei@...hat.com, al.stone@...aro.org,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v3 2/9] clocksource: arm_arch_timer: Extend
 arch_timer_kvm_info to get the virtual IRQ

Hi Christoffer,

On 09/03/2016 10:27, Christoffer Dall wrote:
> On Tue, Mar 08, 2016 at 11:29:26AM +0000, Julien Grall wrote:
>> diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
>> index b7ab588..d8887f3 100644
>> --- a/drivers/clocksource/arm_arch_timer.c
>> +++ b/drivers/clocksource/arm_arch_timer.c
>> @@ -701,6 +701,8 @@ static void __init arch_timer_common_init(void)
>>   	arch_timer_banner(arch_timers_present);
>>   	arch_counter_register(arch_timers_present);
>>   	arch_timer_arch_init();
>> +
>> +	arch_timer_kvm_info.virtual_irq = arch_timer_ppi[VIRT_PPI];
>
> why is this in common_init and not just in init?

I thought we wanted to initialize virtual_irq for both the system 
registers timer and the memory timer. Although, as talked IRL, KVM 
mandates system registers timer. So I will initialize the virtual_irq in 
arch_timer_init.

Cheers,

-- 
Julien Grall