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    SubjectRe: [PATCH] x86: kvm: reset the bootstrap processor when it gets an INIT
    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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