From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gleb Natapov Subject: Re: [PATCH] x86: kvm: reset the bootstrap processor when it gets an INIT Date: Mon, 11 Mar 2013 16:05:03 +0200 Message-ID: <20130311140503.GO31619@redhat.com> References: <20130310153540.GL24444@redhat.com> <513CC08B.2040800@redhat.com> <20130310181035.GM24444@redhat.com> <513DAE8F.3050102@redhat.com> <20130311102852.GE31619@redhat.com> <513DBF45.9030803@redhat.com> <20130311115144.GG31619@redhat.com> <513DDCC2.9070807@redhat.com> <20130311135441.GN31619@redhat.com> <513DE3C4.5000503@siemens.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Paolo Bonzini , "linux-kernel@vger.kernel.org" , "kvm@vger.kernel.org" , "mtosatti@redhat.com" To: Jan Kiszka Return-path: Content-Disposition: inline In-Reply-To: <513DE3C4.5000503@siemens.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org 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. -- Gleb.