linux-kernel - Re: [RFC 12/17] irq: bypass: Extend skeleton for ARM forwarding control

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Date:	Fri, 03 Jul 2015 19:23:45 +0200
From:	Eric Auger <eric.auger@...aro.org>
To:	Paolo Bonzini <pbonzini@...hat.com>, eric.auger@...com,
	linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
	kvm@...r.kernel.org, christoffer.dall@...aro.org,
	marc.zyngier@....com, alex.williamson@...hat.com,
	avi.kivity@...il.com, mtosatti@...hat.com, feng.wu@...el.com,
	joro@...tes.org, b.reynal@...tualopensystems.com
CC:	linux-kernel@...r.kernel.org, patches@...aro.org
Subject: Re: [RFC 12/17] irq: bypass: Extend skeleton for ARM forwarding control

On 07/03/2015 07:20 PM, Paolo Bonzini wrote:
> 
> 
> On 03/07/2015 15:12, Eric Auger wrote:
>>>> Linux IRQ and active should be okay.  As to the vfio_device handle, you
>>>> should link it from the vfio_platform_device instead.  And for the
>>>> vfio_platform_device, you can link it from the vfio_platform_irq instead.
>> For this last one, I don't think this is achievable since if I store the
>> vfio_platform_irq in the opaque, it matches irqs[i] of
>> vfio_platform_device and I don't have any mean to retrieve "i" when
>> calling container_of.
> 
> Right, notice I said "link it":
> 
> 	struct vfio_platform_irq *irq =
> 		container_of(prod, struct vfio_platform_irq, producer);
> 	struct vfio_platform_device *vpdev = irq->vpdev;
> 	struct vfio_device *vdev = vpdev->vdev;
> 
> Would this be okay?

Yes that's what I did. I added the vfio_device handle in struct
vfio_platform_irq

Thanks ;-)

Have a nice WE

Eric
> 
> Paolo
> 

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