linux-kernel - Re: [RFC v2 3/6] irq: bypass: Extend skeleton for ARM forwarding control

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Date:	Tue, 7 Jul 2015 15:22:34 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	"Wu, Feng" <feng.wu@...el.com>, Eric Auger <eric.auger@...aro.org>,
	"eric.auger@...com" <eric.auger@...com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"kvmarm@...ts.cs.columbia.edu" <kvmarm@...ts.cs.columbia.edu>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"christoffer.dall@...aro.org" <christoffer.dall@...aro.org>,
	"marc.zyngier@....com" <marc.zyngier@....com>,
	"alex.williamson@...hat.com" <alex.williamson@...hat.com>,
	"avi.kivity@...il.com" <avi.kivity@...il.com>,
	"mtosatti@...hat.com" <mtosatti@...hat.com>,
	"joro@...tes.org" <joro@...tes.org>,
	"b.reynal@...tualopensystems.com" <b.reynal@...tualopensystems.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"patches@...aro.org" <patches@...aro.org>
Subject: Re: [RFC v2 3/6] irq: bypass: Extend skeleton for ARM forwarding
 control



On 07/07/2015 13:33, Wu, Feng wrote:
>>> > > The need to store the consumer->producer link seems to be unique to
>>> > > posted interrupts.  It is difficult to say without seeing the PI code,
>>> > > but I prefer to keep the bypass manager as small as possible.
>> > 
>> > Fine. I will follow your suggestion!
> If using the following changes, how can we assign 'prod', we need to use
> container_of to get struct kvm_kernel_irqfd and then refer to 'prod', but
> we cannot do this in irq_bypass_register_consumer(), right? It is a
> common API. But we can only get the associated producer info inside
> bypass manager, right?

KVM's add_producer and del_producer callbacks do have a pointer to the
producer.

Paolo
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