Messages in this thread | | | Date | Mon, 11 Mar 2013 16:09:25 +0200 | From | Gleb Natapov <> | Subject | Re: [PATCH] x86: kvm: reset the bootstrap processor when it gets an INIT |
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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? :)
-- Gleb.
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