On 27/01/2021 09:38, Juergen Gross wrote: > diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c > index 4409306364dc..ca5ac10fcbf7 100644 > --- a/arch/x86/xen/enlighten_pv.c > +++ b/arch/x86/xen/enlighten_pv.c > @@ -583,6 +583,12 @@ DEFINE_IDTENTRY_RAW(xenpv_exc_debug) > exc_debug(regs); > } > > +DEFINE_IDTENTRY_RAW(exc_xen_unknown_trap) > +{ > + /* This should never happen and there is no way to handle it. */ > + panic("Unknown trap in Xen PV mode."); Looks much better. How about including regs->entry_vector here, just to short circuit the inevitable swearing which will accompany encountering this panic() ? ~Andrew