Message-ID: <1436457995.1391.231.camel@redhat.com>
Subject: Re: [RFC v2 0/6] IRQ bypass manager and irqfd consumer
From: Alex Williamson <alex.williamson@redhat.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>, Eric Auger <eric.auger@linaro.org>,
        eric.auger@st.com, linux-arm-kernel@lists.infradead.org,
        kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
        christoffer.dall@linaro.org, marc.zyngier@arm.com,
        avi.kivity@gmail.com, mtosatti@redhat.com, feng.wu@intel.com,
        b.reynal@virtualopensystems.com, linux-kernel@vger.kernel.org,
        patches@linaro.org
Date: Thu, 09 Jul 2015 10:06:35 -0600
In-Reply-To: <20150709153458.GX18569@8bytes.org>
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	 <20150709153458.GX18569@8bytes.org>
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On Thu, 2015-07-09 at 17:34 +0200, Joerg Roedel wrote:
> On Thu, Jul 09, 2015 at 04:38:41PM +0200, Paolo Bonzini wrote:
> > >> On Tue, Jul 07, 2015 at 11:17:48AM -0600, Alex Williamson wrote:
> > > If we think that it's *only* a kvm-vfio interaction then we could add it
> > > to virt/kvm/vfio.c.  vfio could use symbol_get to avoid a module
> > > dependency and effectively disable the code path when not used with kvm.
> > > The reverse model of hosting it in vfio and using symbol_get from
> > > kvm-vfio would also work.  Do we really want to declare it to be
> > > kvm-vfio specific though?  Another option would be to simply host it
> > > under virt/lib with module dependencies for both vfio and kvm.
> > 
> > I wonder if in the future we may have some kind of driver-mediated
> > passthrough, e.g. for network drivers.  They might use the bypass
> > mechanism too.  So I think drivers/vfio is too restrictive.
> > 
> > virt/ right now only hosts KVM, but it could for example host lguest
> > too.  virt/lib/ is okay with me.
> 
> Yeah, virt/lib is probably the best choice.

I will make it so.  Thanks,

Alex

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