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Re: [Qemu-devel] [PATCH v7 5/6] Initial implementation of vGICv3

From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH v7 5/6] Initial implementation of vGICv3
Date: Fri, 31 Jul 2015 11:22:57 +0100

On 31 July 2015 at 11:08, Peter Maydell <address@hidden> wrote:
> On 31 July 2015 at 10:32, Pavel Fedin <address@hidden> wrote:
>>  I intentionally put some tracing to these conditions. On my
>> system KVM_DEV_ARM_VGIC_GRP_NR_IRQS is supported and
>> KVM_DEV_ARM_VGIC_CTRL_INIT is not. So will it always be this way?
> That is weird. I thought that the kernel devs had agreed that all
> new VGIC code should require explicit initialization (ie that
> lazy init-on-first-time-it's-needed was only there for legacy
> guests and the old GICv2). The lazy-init stuff was a big source
> of bugs where things weren't inited at the point where you
> expected, which is why it should have gone away...

I just checked with Marc, and he agreed that all kernels
with GICv3 support should support VGIC_CTRL_INIT. What kernel
are you running?

-- PMM

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