RE: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for VT-d PI

[Wu, Feng]

> -----Original Message-----
> From: Paolo Bonzini [mailto:pbonzini@xxxxxxxxxx]
> Sent: Monday, December 22, 2014 5:28 PM
> To: Wu, Feng; Zhang, Yang Z; Thomas Gleixner; Ingo Molnar; H. Peter Anvin;
> x86@xxxxxxxxxx; Gleb Natapov; dwmw2@xxxxxxxxxxxxx; joro@xxxxxxxxxx;
> Alex Williamson; Jiang Liu
> Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; KVM list;
> Eric Auger
> Subject: Re: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for
> VT-d PI
> 
> 
> 
> On 22/12/2014 05:48, Wu, Feng wrote:
> > Do you mean we don't support Lowest priority interrupts? As I mentioned
> before,
> > Lowest priority interrupts is widely used in Linux, so I think supporting lowest
> priority
> > interrupts is very important for Linux guest OS. Do you have any
> ideas/suggestions about
> > how to support Lowest priority interrupts for PI? Thanks a lot!
> 
> Can you support them only if the destination is a single CPU?

Sorry, I am not quite understand this. I still don't understand the "single CPU" here.
Lowest priority interrupts always have a cpumask which contains multiple CPU.

Thanks,
Feng

> 
> Paolo
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