On Thu, 15 Nov 2018 23:14:08 +0800 Peng Hao <peng.hao2@xxxxxxxxxx> wrote: Hi, > When virtual machine starts, hang up. I take it you mean the *guest* hangs? Because it doesn't get a timer interrupt? > The kernel version of guest > is 4.16. Host support vgic_v3. Your host kernel is something recent, I guess? > It was mainly due to the incorrect vgic_irq's(intid=27) group value > during injection interruption. when kvm_vgic_vcpu_init is called, > dist is not initialized at this time. Unable to get vgic V3 or V2 > correctly, so group is not set. Mmh, that shouldn't happen with (v)GICv3. Do you use QEMU (which version?) or some other userland tool? > group is setted to 1 when vgic_mmio_write_group is invoked at some > time. > when irq->group=0 (intid=27), No ICH_LR_GROUP flag was set and > interrupt injection failed. > > Signed-off-by: Peng Hao <peng.hao2@xxxxxxxxxx> > --- > virt/kvm/arm/vgic/vgic-v3.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c > index 9c0dd23..d101000 100644 > --- a/virt/kvm/arm/vgic/vgic-v3.c > +++ b/virt/kvm/arm/vgic/vgic-v3.c > @@ -198,7 +198,7 @@ void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, > struct vgic_irq *irq, int lr) if (vgic_irq_is_mapped_level(irq) && > (val & ICH_LR_PENDING_BIT)) irq->line_level = false; > > - if (irq->group) > + if (model == KVM_DEV_TYPE_ARM_VGIC_V3) This is not the right fix, not only because it basically reverts the GICv3 part of 87322099052 (KVM: arm/arm64: vgic: Signal IRQs using their configured group). Can you try to work out why kvm_vgic_vcpu_init() is apparently called before dist->vgic_model is set, also what value it has? If I understand the code correctly, that shouldn't happen for a GICv3. Cheers, Andre. > val |= ICH_LR_GROUP; > > val |= (u64)irq->priority << ICH_LR_PRIORITY_SHIFT; _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
