From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: TimDeegan <tim@xen.org>, Keir Fraser <keir@xen.org>,
Xen-devel List <xen-devel@lists.xen.org>
Subject: Re: Boot time trap handling
Date: Mon, 12 May 2014 14:01:14 +0100 [thread overview]
Message-ID: <5370C61A.4000505@citrix.com> (raw)
In-Reply-To: <5370E1B70200007800011690@mail.emea.novell.com>
On 12/05/14 13:59, Jan Beulich wrote:
>>>> On 12.05.14 at 14:53, <andrew.cooper3@citrix.com> wrote:
>> One point I forgot to say was that I plan to leave the reserved
>> exception vectors with non-present descriptors. This way we get a fatal
>> GPF indicating the exact vector, rather than a PCPU lockup optionally
>> followed by an NMI watchdog timeout when another pcpu times out waiting
>> for the locked up pcpu to rendezvous in the time calibration code.
> This I'm not sure about. Replacing the simplistic handler is a must of
> course, but I would tend towards a generic exception handler wired
> up to fatal_trap() rather than having to decode the #GP error code
> to understand what's going on.
>
> Jan
>
Ok - I will make a formal entry point for each of the reserved exceptions.
~Andrew
prev parent reply other threads:[~2014-05-12 13:01 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-12 10:40 Boot time trap handling Andrew Cooper
2014-05-12 12:09 ` Jan Beulich
2014-05-12 12:53 ` Andrew Cooper
2014-05-12 12:59 ` Jan Beulich
2014-05-12 13:01 ` Andrew Cooper [this message]
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