linux-kernel - Re: [PATCH v5 6/9] irqchip/gic-v3: Parse and export virtual GIC information

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Date:	Mon, 11 Apr 2016 15:27:45 +0100
From:	Julien Grall <julien.grall@....com>
To:	Hanjun Guo <hanjun.guo@...aro.org>, kvmarm@...ts.cs.columbia.edu
Cc:	christoffer.dall@...aro.org, 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, gg@...mlogic.co.uk,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Cooper <jason@...edaemon.net>
Subject: Re: [PATCH v5 6/9] irqchip/gic-v3: Parse and export virtual GIC
 information

Hello Hanjun,

On 11/04/16 06:27, Hanjun Guo wrote:
> On 2016/4/4 19:37, Julien Grall wrote:
>> +static void __init gic_acpi_setup_kvm_info(void)
>> +{
>> +    int irq;
>> +
>> +    if (!gic_acpi_collect_virt_info()) {
>> +        pr_warn("Unable to get hardware information used for
>> virtualization\n");
>> +        return;
>> +    }
>> +
>> +    gic_v3_kvm_info.type = GIC_V3;
>> +
>> +    irq = acpi_register_gsi(NULL, acpi_data.maint_irq,
>> +                acpi_data.maint_irq_mode,
>> +                ACPI_ACTIVE_HIGH);
>> +    if (irq <= 0)
>> +        return;
>> +
>> +    gic_v3_kvm_info.maint_irq = irq;
>> +
>> +    if (acpi_data.vcpu_base) {
>
> Sorry, I'm not familiar with KVM, but I got a question here, will
> KVM works without valid vcpu_base in GICv3 mode?

vcpu_base is only required for supporting GICv2 on GICv3.

Regards,

-- 
Julien Grall