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Date:	Mon, 22 Dec 2014 22:13:18 +0800
From:	Yong Wang <>
To:	Paolo Bonzini <>
Cc:	"Wu, Feng" <>,
	"Zhang, Yang Z" <>,
	Thomas Gleixner <>,
	Ingo Molnar <>,
	"H. Peter Anvin" <>,
	"" <>, Gleb Natapov <>,
	"" <>,
	"" <>,
	Alex Williamson <>,
	Jiang Liu <jiang.liu-VuQAYsv1563Yd54FQh9/>,
	"" <>,
	"" <>,
	KVM list <>,
	Eric Auger <>
Subject: Re: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for
 VT-d PI

On Mon, Dec 22, 2014 at 12:23:36PM +0100, Paolo Bonzini wrote:
> On 22/12/2014 12:17, Wu, Feng wrote:
> >> Yes, and those need not be accelerated.  But what if you set
> >> affinity to a single CPU?
> >
> > How do I set affinity to a single CPU if guest configure a lowest
> > priority interrupt? Thanks a lot!
> I mean if the guest (via irqbalance and /proc/irq/) configures affinity
> to a single vCPU.  In that case, you can use PI.

The problem is we still need to support PI with lowest priority delivery mode
even if guest does not configure irq affinity via /proc/irq/. Don't we?


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