On Fri, 20 Jul 2018 at 00:31, Radim Krčmář <rkrc...@redhat.com> wrote: > > 2018-07-03 14:21+0800, Wanpeng Li: > > From: Wanpeng Li <wanpen...@tencent.com> > > > > The NMI delivery mode of ICR is used to deliver an NMI to the processor, > > and the vector information is ignored. > > > > Cc: Paolo Bonzini <pbonz...@redhat.com> > > Cc: Radim Krčmář <rkrc...@redhat.com> > > Cc: Vitaly Kuznetsov <vkuzn...@redhat.com> > > Signed-off-by: Wanpeng Li <wanpen...@tencent.com> > > --- > > diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c > > @@ -479,7 +479,16 @@ static int __send_ipi_mask(const struct cpumask *mask, > > int vector) > > } > > } > > > > - ret = kvm_hypercall3(KVM_HC_SEND_IPI, ipi_bitmap_low, > > ipi_bitmap_high, vector); > > + switch (vector) { > > + default: > > + icr = APIC_DM_FIXED | vector; > > + break; > > + case NMI_VECTOR: > > + icr = APIC_DM_NMI; > > I think it would be better to say that KVM interprets NMI_VECTOR and > sends the interrupt as APIC_DM_NMI.
Yeah, in addition, SDM 10.6.1 also mentioned that: Delivery mode: 100 (NMI) Delivers an NMI interrupt to the target processor or processors. The vector information is ignored. Regards, Wanpeng Li