Re: [PATCH] accel/kvm: Make "kernel_irqchip" default on

[Xiaoyao Li <xiaoyao.li@intel.com>]

On Sat, 2019-12-28 at 10:57 +0000, Paolo Bonzini wrote:
> 
> 
> Il sab 28 dic 2019, 10:24 Xiaoyao Li <xiaoyao.li@intel.com> ha scritto:
> > BTW, it seems that this patch makes kernel_irqchip default on to workaround
> > the
> > bug. 
> > However, when explicitly configuring kernel_irqchip=off, guest still fails
> > booting due to "KVM: failed to send PV IPI: -95" with a latest upstream
> > kernel
> > ubuntu guest. Any idea about this? 
> 
> We need to clear the PV IPI feature for userspace irqchip. Are you using -cpu
> host by chance?

Yes, I used -cpu host.

After using "-cpu host,-kvm-pv-ipi" with kernel_irqchip=off, it can boot
successfully.

> Paolo
> 
> > > Paolo
> > > >  }
> > > > 
> > > >  static void kvm_accel_class_init(ObjectClass *oc, void *data)
> > > > diff --git a/include/hw/boards.h b/include/hw/boards.h
> > > > index 61f8bb8e5a42..fb1b43d5b972 100644
> > > > --- a/include/hw/boards.h
> > > > +++ b/include/hw/boards.h
> > > > @@ -271,9 +271,6 @@ struct MachineState {
> > > > 
> > > >      /*< public >*/
> > > > 
> > > > -    bool kernel_irqchip_allowed;
> > > > -    bool kernel_irqchip_required;
> > > > -    bool kernel_irqchip_split;
> > > >      char *dtb;
> > > >      char *dumpdtb;
> > > >      int phandle_start;
> >