Unexpected IO-APIC

This kernel is 2.5.31-bk6. The motherboard is a VIA VT8017B, with an Athlon XP, KT333 and VT8235 (with USB 2.0). I append what seem to be the relevant parts of dmesg output; your list archives don't seem list version=3 yet.

It seems to behave with a non-SMP kernel, but an earlier SMP config didn't handle any of the USB IRQs right; they seem to have been routed wrong (to irq5+irq11, not irq19+irq21). I've not explored the MPS=1.1 option; or maybe the clue is that the BIOS says it's a not-for-sale demo. :)

Speaking of non-working SMP, I was surprised to see this kernel mark itself as SMP tainted just because its single CPU doesn't have the 'mp' cpu flag. It's a uniprocessor; that can't matter. I just want spinlock bugs to get reported.

- Dave

ENABLING IO-APIC IRQs
Setting 2 in the phys_id_present_map
...changing IO-APIC physical APIC ID to 2 ... ok.
init IO_APIC IRQs
IO-APIC (apicid-pin) 2-0, 2-5, 2-16, 2-17, 2-20, 2-23 not connected.
..TIMER: vector=0x31 pin1=2 pin2=0
number of MP IRQ sources: 23.
number of IO-APIC #2 registers: 24.
testing the IO APIC.......................

IO APIC #2......
.... register #00: 02000000
....... : physical APIC id: 02
.... register #01: 00178003

.......     : max redirection entries: 0017
.......     : PRQ implemented: 1
.......     : IO APIC version: 0003

WARNING: unexpected IO-APIC, please mail
to [email protected]
.... IRQ redirection table:
NR Log Phy Mask Trig IRR Pol Stat Dest Deli Vect:

 00 000 00  1    0    0   0   0    0    0    00
 01 001 01  0    0    0   0   0    1    1    39
 02 001 01  0    0    0   0   0    1    1    31
 03 001 01  0    0    0   0   0    1    1    41
 04 001 01  0    0    0   0   0    1    1    49
 05 000 00  1    0    0   0   0    0    0    00
 06 001 01  0    0    0   0   0    1    1    51
 07 001 01  0    0    0   0   0    1    1    59
 08 001 01  0    0    0   0   0    1    1    61
 09 001 01  0    0    0   0   0    1    1    69
 0a 001 01  0    0    0   0   0    1    1    71
 0b 001 01  1    1    0   1   0    1    1    79
 0c 001 01  0    0    0   0   0    1    1    81
 0d 001 01  0    0    0   0   0    1    1    89
 0e 001 01  0    0    0   0   0    1    1    91
 0f 001 01  0    0    0   0   0    1    1    99
 10 000 00  1    0    0   0   0    0    0    00
 11 000 00  1    0    0   0   0    0    0    00
 12 001 01  1    1    0   1   0    1    1    A1
 13 001 01  1    1    0   1   0    1    1    A9
 14 000 00  1    0    0   0   0    0    0    00
 15 001 01  1    1    0   1   0    1    1    B1
 16 001 01  1    1    0   1   0    1    1    B9
 17 000 00  1    0    0   0   0    0    0    00

IRQ to pin mappings:
IRQ0 -> 0:2
IRQ1 -> 0:1
IRQ3 -> 0:3
IRQ4 -> 0:4
IRQ6 -> 0:6
IRQ7 -> 0:7
IRQ8 -> 0:8
IRQ9 -> 0:9
IRQ10 -> 0:10
IRQ11 -> 0:11
IRQ12 -> 0:12
IRQ13 -> 0:13
IRQ14 -> 0:14
IRQ15 -> 0:15
IRQ18 -> 0:18
IRQ19 -> 0:19
IRQ21 -> 0:21
IRQ22 -> 0:22
.................................... done.
Using local APIC timer interrupts.
calibrating APIC timer ...
..... CPU clock speed is 1532.0300 MHz.
..... host bus clock speed is 266.0487 MHz.
cpu: 0, clocks: 266487, slice: 133243
CPU0<T0:266480,T1:133232,D:5,S:133243,C:266487>