Messages in this thread | | | From | (Eric W. Biederman) | 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 |
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"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.
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