linux-kernel - Re: [PATCH] KVM: arm/arm64: vgic: add init entry to VGIC KVM device

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Date:	Thu, 4 Dec 2014 12:07:59 +0000
From:	Peter Maydell <peter.maydell@...aro.org>
To:	Eric Auger <eric.auger@...aro.org>
Cc:	eric.auger@...com, Christoffer Dall <christoffer.dall@...aro.org>,
	Marc Zyngier <marc.zyngier@....com>,
	arm-mail-list <linux-arm-kernel@...ts.infradead.org>,
	"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
	kvm-devel <kvm@...r.kernel.org>,
	Alex Williamson <alex.williamson@...hat.com>,
	Alexander Graf <agraf@...e.de>,
	"gleb@...nel.org" <gleb@...nel.org>,
	Paolo Bonzini <pbonzini@...hat.com>,
	lkml - Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Patch Tracking <patches@...aro.org>
Subject: Re: [PATCH] KVM: arm/arm64: vgic: add init entry to VGIC KVM device

On 4 December 2014 at 12:01, Eric Auger <eric.auger@...aro.org> wrote:
> Here is the sequence:
> 1) The VGIC early initialization is initiated in a machine init done
> notifier. This notifier is registered in kvm_arm_gic_realize
> (http://lists.gnu.org/archive/html/qemu-devel/2014-12/msg00220.html). It
> executes after vcpu instantiations + dist/cpu interface base address
> setting + nb irq setting.
> 2) the VFIO signaling and irqfd setup is done in a reset notifier
> http://lists.gnu.org/archive/html/qemu-devel/2014-11/msg04365.html

OK. And on x86 VFIO how does this work? Obviously x86's GIC just
initializes as soon as it's created, but do we do the irqfd setup
in a reset notifier there too?

thanks
-- PMM
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