From: Ashok Raj <ashok.raj@intel.com>
To: linux-ia64@vger.kernel.org
Subject: Re: MCA and processors in SAL_BOOT_RENDEZ status
Date: Tue, 15 Jun 2004 16:17:33 +0000 [thread overview]
Message-ID: <20040615091732.A10389@unix-os.sc.intel.com> (raw)
In-Reply-To: <AEBB9AF2F7713A4FAB1397435451162E4BFAF5@spock.invent.psi.com>
On Mon, Jun 14, 2004 at 06:01:08PM -0700, John Lee wrote:
>
> >> >Q1: Do they participate in SAL's monarch selection anyway and can
> >> >possibly be the monarch to execute OS_MCA code ? Or they just
> cannot
> >> >join the RENDEZVOUS and receive INIT later ?
> >>
> >> Cpus that were never started by the OS shouldn't be a part of an
> >> MCA rendezvous.
> >
> >Correct. Or to be more specific SAL should'nt select them as monarch
> >since officially OS has not taken control of that CPU.
>
>
> Is this because they are still in BOOT_RENDEZV state ?
> These CPUs are guaranteed not to participate in MCA processing?
> How does SAL tell them from CPUs under Linux in monarch selection?
SAL knows which processors are in OS control, since it also processes the wakeup
vector when OS sends a wakeup to wakeup the CPU. The wakeup vector is
obtained from the sal tables via efi vars.
>
> >> >Q3: the same question w/ the processors that are logically
> deconfigured
> mode.
> What if the processor logically deconfigured from Linux is not put
> back in BOOT_RENDEZV but is running its own independent code ? I think
> global MCA can come thru the processor. Is there any way to make SAL
> not choose the processor for global MCAs - for example, a SAL call for
> Linux to call to specify disqualified processors to reflect Linux's
> logical view?
Humm, just curious, is this because you are trying to use this one cpu for some other
processing outside of kernel resources, say for dedicated processing something...
I dont know of the top of my head, i will let you know once i find out.
-
Cheers,
Ashok Raj
- Linux OS Technologies Team
prev parent reply other threads:[~2004-06-15 16:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-02 20:34 MCA and processors in SAL_BOOT_RENDEZ status John Lee
2004-06-02 20:46 ` Luck, Tony
2004-06-02 21:50 ` John Lee
2004-06-11 23:19 ` Ashok Raj
2004-06-15 16:12 ` John Lee
2004-06-15 16:17 ` Ashok Raj [this message]
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