From: ebiederm@xmission.com (Eric W. Biederman)
To: "Lu, Yinghai" <yinghai.lu@amd.com>
Cc: "Linus Torvalds" <torvalds@osdl.org>,
"Tobias Diedrich" <ranma+kernel@tdiedrich.de>,
"Andrew Morton" <akpm@osdl.org>, "Adrian Bunk" <bunk@stusta.de>,
"Andi Kleen" <ak@suse.de>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/4] x86_64 ioapic: Improve the heuristics for when check_timer fails.
Date: Mon, 08 Jan 2007 13:46:46 -0700 [thread overview]
Message-ID: <m1wt3xgsax.fsf@ebiederm.dsl.xmission.com> (raw)
In-Reply-To: <5986589C150B2F49A46483AC44C7BCA4907360@ssvlexmb2.amd.com> (Yinghai Lu's message of "Mon, 8 Jan 2007 09:16:32 -0800")
"Lu, Yinghai" <yinghai.lu@amd.com> writes:
>
>>I have tested this on an Nvidia board that reports that apic 0 pin 2
>>works when it does not and this code successfully programs apic 0 pin 0
>>into ExtINT mode.
>
> For some CK804 boards, BIOS forget set to 8254 timer to apic0/pin2, and
> still leave it at apic0/pin0. but mptable and acpi said 8254 timer is to
> apic0/pin2. At such case we should try apic0/pin0 with INT mode instead
> of ExtINT mode.
Duh. I forgot Nvidia provided a register like that, now I am
beginning to understand what is wrong. Anyway we do try apic0 pin0 by
default on the Nvidia's because of a Nvidia specific work around.
So that doesn't invalidate the generic test. I'm going to go dig
out what little information I have and see if I can stair at the
register definition.
Anyway that doesn't invalidate anything in this patch.
Eric
next prev parent reply other threads:[~2007-01-08 20:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-08 17:16 Lu, Yinghai
2007-01-08 20:46 ` Eric W. Biederman [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-01-09 22:15 Lu, Yinghai
2007-01-10 10:30 ` Tobias Diedrich
2007-01-08 20:53 Lu, Yinghai
2007-01-08 21:33 ` Eric W. Biederman
2007-01-08 17:41 Lu, Yinghai
2007-01-08 20:39 ` Eric W. Biederman
[not found] <5986589C150B2F49A46483AC44C7BCA490733F@ssvlexmb2.amd.com>
2007-01-03 6:23 ` 2.6.20-rc3: known unfixed regressions - x86_64 boot failure: "IO-APIC + timer doesn't work" Yinghai Lu
2007-01-08 0:55 ` Tobias Diedrich
2007-01-08 1:09 ` Linus Torvalds
2007-01-08 15:49 ` [PATCH 1/4] x86_64 io_apic: Implement remove_pin_to_irq Eric W. Biederman
2007-01-08 15:53 ` PATCH 2/4] x86_64 io_apic: Implement irq_from_pin Eric W. Biederman
2007-01-08 15:56 ` [PATCH 3/4] x86_64 io_apic: Implment update_irq0_entry Eric W. Biederman
2007-01-08 16:11 ` [PATCH 4/4] x86_64 ioapic: Improve the heuristics for when check_timer fails Eric W. Biederman
2007-01-08 20:21 ` Adrian Bunk
2007-01-08 21:45 ` Eric W. Biederman
2007-01-08 22:33 ` Adrian Bunk
2007-01-08 22:57 ` Linus Torvalds
2007-01-08 23:18 ` Eric W. Biederman
2007-01-09 22:00 ` Tobias Diedrich
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