> -----Original Message----- > From: Paolo Bonzini [mailto:paolo.bonz...@gmail.com] On Behalf Of Paolo > Bonzini > Sent: Saturday, December 20, 2014 9:17 PM > To: Wu, Feng; Paolo Bonzini; Zhang, Yang Z; Thomas Gleixner; Ingo Molnar; H. > Peter Anvin; x...@kernel.org; Gleb Natapov; dw...@infradead.org; > j...@8bytes.org; Alex Williamson; Jiang Liu > Cc: iommu@lists.linux-foundation.org; linux-ker...@vger.kernel.org; KVM list; > Eric Auger > Subject: Re: [v3 13/26] KVM: Define a new interface kvm_find_dest_vcpu() for > VT-d PI > > > > On 20/12/2014 00:48, Wu, Feng wrote: > > In my understanding, lowest priority interrupts are always delivered to a > > Single CPU, we need to find the right destination CPU from the cpumask. > > Yes, but which CPU however differs every time the interrupt is > delivered. So the emulation here is a bit poor. For now, please limit > PI to fixed interrupts.
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! Thanks, Feng > > > Actually, we don't support posting broadcast/multicast interrupts, because > > the interrupt is associated with one Posted-interrupts descriptor, then one > > vCPU. > > Understood. > > Paolo _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
