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From: ebiederm@xmission.com (Eric W. Biederman)
To: Andi Kleen <ak@suse.de>
Cc: Benjamin Romer <benjamin.romer@unisys.com>,
	Vivek Goyal <vgoyal@in.ibm.com>,
	patches@x86-64.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH x86 for review III] [7/29] x86_64: update IO-APIC dest field to 8-bit for xAPIC
Date: Mon, 12 Feb 2007 12:49:28 -0700	[thread overview]
Message-ID: <m164a7w3zr.fsf@ebiederm.dsl.xmission.com> (raw)
In-Reply-To: <20070212165127.1790A13FAE@wotan.suse.de> (Andi Kleen's message of "Mon, 12 Feb 2007 17:51:27 +0100 (CET)")

Andi Kleen <ak@suse.de> writes:

> From: Benjamin Romer <benjamin.romer@unisys.com>
>
> On the Unisys ES7000/ONE system, we encountered a problem where performing
> a kexec reboot or dump on any cell other than cell 0 causes the system
> timer to stop working, resulting in a hang during timer calibration in the
> new kernel.
>
> We traced the problem to one line of code in disable_IO_APIC(), which needs
> to restore the timer's IO-APIC configuration before rebooting.  The code is
> currently using the 4-bit physical destination field, rather than using the
> 8-bit logical destination field, and it cuts off the upper 4 bits of the
> timer's APIC ID.  If we change this to use the logical destination field,
> the timer works and we can kexec on the upper cells.  This was tested on
> two different cells (0 and 2) in an ES7000/ONE system.
>
> For reference, the relevant Intel xAPIC spec is kept at
> ftp://download.intel.com/design/chipsets/e8501/datashts/30962001.pdf,
> specifically on page 334.
>
> Signed-off-by: Benjamin M Romer <benjamin.romer@unisys.com>
> Signed-off-by: Andi Kleen <ak@suse.de>
> Cc: Andi Kleen <ak@suse.de>
> Cc: "Eric W. Biederman" <ebiederm@xmission.com>
> Cc: Vivek Goyal <vgoyal@in.ibm.com>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Acked-by: Eric W. Biederman" <ebiederm@xmission.com>


  reply	other threads:[~2007-02-12 19:50 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-12 16:51 [PATCH x86 for review III] [1/29] i386: avoid gcc extension Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [2/29] i386: support Classic MediaGXm Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [3/29] i386: entry.S END/ENDPROC annotations Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [4/29] x86_64: clean up sparsemem memory_present call Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [5/29] i386: arch/i386/kernel/alternative.c should #include <asm/bugs.h> Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [6/29] i386: Remove unused kernel config option X86_XADD Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [7/29] x86_64: update IO-APIC dest field to 8-bit for xAPIC Andi Kleen
2007-02-12 19:49   ` Eric W. Biederman [this message]
2007-02-12 16:51 ` [PATCH x86 for review III] [8/29] x86_64: avoid warning message livelock Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [9/29] x86_64: Minor patch for compilation warning in x86_64 signal code Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [10/29] i386: don't include bugs.h Andi Kleen
2007-02-12 17:35   ` Jörn Engel
2007-02-12 18:33     ` Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [11/29] i386: add option to show more code in oops reports Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [12/29] x86_64: 32-bit ptrace mangles sixth system call argument Andi Kleen
2007-02-12 22:04   ` Chuck Ebbert
2007-02-12 22:26     ` Andi Kleen
2007-02-14 17:52     ` Jeff Dike
2007-02-12 16:51 ` [PATCH x86 for review III] [13/29] i386: geode configuration fixes Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [15/29] x86_64: Fix wrong gcc check in bitops.h Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [16/29] i386: Remove fastcall in paravirt.[ch] Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [17/29] x86: Add new CPUID bits for AMD Family 10 CPUs in /proc/cpuinfo Andi Kleen
2007-02-12 22:11   ` Chuck Ebbert
2007-02-12 22:23     ` Andi Kleen
2007-02-12 22:37       ` Chuck Ebbert
2007-02-12 22:38         ` Andi Kleen
2007-02-12 23:04           ` Chuck Ebbert
2007-02-12 16:51 ` [PATCH x86 for review III] [18/29] i386: Add L3 cache support to AMD CPUID4 emulation Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [19/29] x86: Enable NMI watchdog for AMD Family 0x10 CPUs Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [20/29] i386: Fix warning in microcode.c Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [21/29] i386: Fix warning in cpu initialization Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [23/29] x86: Don't require the vDSO for handling a.out signals Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [24/29] x86_64: -mm merge plans for 2.6.21 Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [25/29] i386: paravirt unhandled fallthrough Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [26/29] i386: Move mce_disabled to asm/mce.h Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [27/29] i386: Rename cpu_gdt_descr and remove extern declaration from smpboot.c Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [28/29] i386: Remove extern declaration from mm/discontig.c, put in header Andi Kleen
2007-02-12 16:51 ` [PATCH x86 for review III] [29/29] x86: Unify pcspeaker platform device code between i386/x86-64 Andi Kleen
2007-02-12 19:43 ` [PATCH x86 for review III] [1/29] i386: avoid gcc extension Jochen Voß
2007-02-12 20:18   ` Randy Dunlap
2007-02-13 15:11 ` Arnd Bergmann
2007-02-13 16:10   ` Randy Dunlap
2007-02-13 16:52     ` Andi Kleen

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