From: Jack Steiner <steiner@sgi.com>
To: suresh.b.siddha@intel.com
Cc: mingo@elte.hu, linux-kernel@vger.kernel.org
Subject: Possible x2apic breakage
Date: Thu, 29 Jan 2009 09:41:46 -0600 [thread overview]
Message-ID: <20090129154146.GA2694@sgi.com> (raw)
Suresh -
This popped up in Ingo's x86 tree yesterday. This appears to be breaking
on our simulator running in x2apic mode. If I understand the code,
this is a real breakage and not a problem in our simulator:
arch/x86/include/asm/genapic.h
static inline unsigned int read_apic_id(void)
{
unsigned int reg;
reg = *(u32 *)(APIC_BASE + APIC_ID);
return apic->get_apic_id(reg);
}
As expected, the failure occurs right after:
Enabling x2apic
Enabled x2apic and interrupt-remapping
The next reference to apicid tries to read from mem instead of MSRs.
--- jack
next reply other threads:[~2009-01-29 15:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-29 15:41 Jack Steiner [this message]
2009-01-29 16:15 ` Possible x2apic breakage Ingo Molnar
2009-01-29 20:03 ` Jack Steiner
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090129154146.GA2694@sgi.com \
--to=steiner@sgi.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=suresh.b.siddha@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.