On Mon, Mar 11, 2013 at 03:10:45PM +0100, Jan Kiszka wrote: > On 2013-03-11 15:09, Gleb Natapov wrote: > > On Mon, Mar 11, 2013 at 03:06:18PM +0100, Jan Kiszka wrote: > >> On 2013-03-11 15:05, Gleb Natapov wrote: > >>> On Mon, Mar 11, 2013 at 03:01:40PM +0100, Jan Kiszka wrote: > >>>>> We are not moving away from mp_state, we are moving away from using > >>>>> mp_state for signaling because with nested virt INIT does not always > >>>>> change mp_state, not only that it can change mp_state long after signal > >>>>> is received after vmx off is done. > >>>> > >>>> Right. > >>>> > >>>> BTW, for that to happen, we will also need to influence the INIT level. > >>>> Unless I misread the spec, INIT is blocked while in root mode, and if > >>>> you deassert INIT before leaving root (vmxoff, vmenter), nothing > >>>> actually happens. So what matters is the INIT signal level at the exit > >>>> of root mode. > >>>> > >>> You are talking about INIT# signal received via CPU pin, right? I think > >>> INIT send by IPI cannot go away. > >> > >> Why shouldn't it? Besides edge, there is also level-triggered INIT. > >> > > OK, so level-triggered INIT can be de-asserted what about edge triggered > > one? :) > > It should be lost while in root mode. > Ah, that's great. Removes some potential complications. -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
