[Bug 264819] panic: pci_get_bus failed for pcib0 on bus legacy0, error = 2

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264819

            Bug ID: 264819
           Summary: panic: pci_get_bus failed for pcib0 on bus legacy0,
                    error = 2
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: dclarke@blastwave.org

To be fair this is an old old machine and I was merely testing but
here is what I see from the serial console : 

Loading kernel...
/boot/kernel/kernel text=0xfe834 text=0xb1fc10 text=0x5feb24 data=0xb0
data=0x10e214+0x31f794 0x4+0xf02c0+0x4+0x188333|
Loading configured modules...
can't find '/etc/hostid'
can't find '/boot/entropy'
GDB: no debug ports present
KDB: debugger backends: ddb
KDB: current backend: ddb
---<<BOOT>>---
MP Configuration Table version 1.4 found at 0x49f160
Firmware Error (ACPI): A valid RSDP was not found (20220331/tbxfroot-369)
APIC: Using the MPTable enumerator.
Copyright (c) 1992-2022 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 14.0-CURRENT #0 main-n256174-c692ea40265: Fri Jun 17 07:59:39 UTC 2022
    root@releng1.nyi.freebsd.org:/usr/obj/usr/src/i386.i386/sys/GENERIC i386
FreeBSD clang version 14.0.5 (https://github.com/llvm/llvm-project.git
llvmorg-14.0.5-0-gc12386ae247c)
WARNING: WITNESS option enabled, expect reduced performance.
VT(vga): resolution 640x480
Preloaded elf kernel "/boot/kernel/kernel" at 0x22cb000.
Preloaded TSLOG data "TSLOG" at 0x22d3af4.
Early TSC frequency 399019910Hz calibrated from 8254 PIT
CPU: Pentium II/Pentium II Xeon/Celeron (399.02-MHz 686-class CPU)
  Origin="GenuineIntel"  Id=0x652  Family=0x6  Model=0x5  Stepping=2
 
Features=0x183fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
Instruction TLB: 4 KB pages, 4-way set associative, 32 entries
Instruction TLB: 4 MB pages, fully associative, 2 entries
Data TLB: 4 KB pages, 4-way set associative, 64 entries
2nd-level cache: 512 KB, 4-way set associative, 32 byte line size
1st-level instruction cache: 16 KB, 4-way set associative, 32 byte line size
Data TLB: 4 MB Pages, 4-way set associative, 8 entries
1st-level data cache: 16 KB, 4-way set associative, 32 byte line size
real memory  = 805306368 (768 MB)
Physical memory chunk(s):
0x0000000000001000 - 0x000000000009dfff, 643072 bytes (157 pages)
0x0000000000100000 - 0x00000000007fffff, 7340032 bytes (1792 pages)
0x0000000002500000 - 0x000000002f0e4fff, 750669824 bytes (183269 pages)
avail memory = 756310016 (721 MB)
MPTable: <SMP: Added CPU 1 (BSP)
SMP: Added CPU 0 (AP)
HP       XU/XW       >
Event timer "LAPIC" quality 100
LAPIC: ipi_wait() us multiplier 9 (r 4000105 tsc 399019910)
Package ID shift: 0
L2 cache ID shift: 0
L1 cache ID shift: 0
INTR: Adding local APIC 0 as a target
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
FreeBSD/SMP: 2 package(s) x 1 core(s)
Package HW ID = 1
                CPU0 (BSP): APIC ID: 1
Package HW ID = 0
                CPU1 (AP): APIC ID: 0
Pentium Pro MTRR support enabled
bios32: Found BIOS32 Service Directory header at 0x4f70b0
bios32: Entry = 0xfd7ac (4fd7ac)  Rev = 0  Len = 1
pcibios: PCI BIOS entry at 0xfd720+0x291
pnpbios: Found PnP BIOS data at 0x4f7110
pnpbios: Entry = f0000:ada2  Rev = 1.0
Other BIOS signatures found:
random: no preloaded entropy cache
random: no platform bootloader entropy
arc4random: WARNING: initial seeding bypassed the cryptographic random device
because it was not yet seeded and the knob 'bypass_before_seeding' was enabled.
VIMAGE (virtualized network stack) enabled
hostuuid: using 00000000-0000-0000-0000-000000000000
ULE: setup cpu 0
ULE: setup cpu 1
ioapic0: Assuming intbase of 0
ioapic0: ver 0x11 maxredir 0x17
ioapic0: Routing external 8259A's -> intpin 0
ioapic0: Routing IRQ 0 -> intpin 2
lapic: Routing ExtINT -> LINT0
lapic: LINT0 trigger: edge
lapic: LINT0 polarity: high
lapic: Routing NMI -> LINT1
lapic: LINT1 trigger: edge
lapic: LINT1 polarity: high
ioapic0 <Version 1.1> irqs 0-23
cpu0 BSP:
     ID: 0x01000000   VER: 0x00040011 LDR: 0x00000000 DFR: 0xffffffff
  lint0: 0x00010700 lint1: 0x00000400 TPR: 0x00000000 SVR: 0x000001ff
  timer: 0x000100ef therm: 0x00000000 err: 0x000000f0 pmc: 0x00010400
CPU0: local APIC error 0x80
SMP: AP CPU #1 Launched!
cpu1 AP:
     ID: 0x00000000   VER: 0x00040011 LDR: 0x00000000 DFR: 0xffffffff
  lint0: 0x00010700 lint1: 0x00000400 TPR: 0x00000000 SVR: 0x000001ff
  timer: 0x000100ef therm: 0x00000000 err: 0x000000f0 pmc: 0x00010400
TSC timecounter disables C2 and C3.
CPU1: local APIC error 0x80
snd_unit_init() u=0x00ff8000 [512] d=0x00007c00 [32] c=0x000003ff [1024]
feeder_register: snd_unit=-1 snd_maxautovchans=16 latency=2 feeder_rate_min=1
feeder_rate_max=2016000 feeder_rate_round=25
wlan: <802.11 Link Layer>
random: entropy device external interface
kbd: new array size 4
kbd1 at kbdmux0
crypto: <crypto core>
mem: <memory>
null: <full device, null device, zero device>
io: <I/O>
[ath_hal] loaded
Firmware Error (ACPI): A valid RSDP was not found (20220331/tbxfroot-369)
ACPI: Table initialisation failed: AE_NOT_FOUND
ACPI: Try disabling either ACPI or apic support.
vtvga0: <VT VGA driver>
crypto: assign cryptosoft0 driver id 0, flags 0x6000000
aesni0: No AES or SHA support.
pci_open(1):    mode 1 addr port (0x0cf8) is 0x80003b90
pci_open(1a):   mode1res=0x80000000 (0x80000000)
pci_cfgcheck:   device 0 [class=060000] [hdr=00] is there (id=71908086)
pcibios: BIOS version 2.10
pcib0: <MPTable Host-PCI bridge> pcibus 0
panic: pci_get_bus failed for pcib0 on bus legacy0, error = 2
cpuid = 0
time = 1
KDB: stack backtrace:
db_trace_self_wrapper(2,1d83720,2,e042a80,e044ed0,...) at
db_trace_self_wrapper+0x28/frame 0x24f9b3c
vpanic(154f803,24f9b78,24f9b78,24f9bbc,141582b,...) at vpanic+0xf4/frame
0x24f9b58
panic(154f803,146e415,e044ed0,e030c60,2,...) at panic+0x14/frame 0x24f9b6c
mptable_pci_host_res_init(e042a80) at mptable_pci_host_res_init+0x2eb/frame
0x24f9bbc
mptable_hostb_attach(e042a80) at mptable_hostb_attach+0xd/frame 0x24f9bcc
device_attach(e042a80) at device_attach+0x301/frame 0x24f9bf4
device_probe_and_attach(e042a80) at device_probe_and_attach+0x5f/frame
0x24f9c0c
bus_generic_attach(e042b00) at bus_generic_attach+0x16/frame 0x24f9c1c
legacy_attach(e042b00) at legacy_attach+0xe6/frame 0x24f9c30
device_attach(e042b00) at device_attach+0x301/frame 0x24f9c58
device_probe_and_attach(e042b00) at device_probe_and_attach+0x5f/frame
0x24f9c70
bus_generic_attach(e042e00) at bus_generic_attach+0x16/frame 0x24f9c80
nexus_attach(e042e00) at nexus_attach+0x5c/frame 0x24f9c90
device_attach(e042e00) at device_attach+0x301/frame 0x24f9cb8
device_probe_and_attach(e042e00,7fffffff,e02ff80,e043000,24f9d00,...) at
device_probe_and_attach+0x5f/frame 0x24f9cd0
bus_generic_new_pass(e043000) at bus_generic_new_pass+0xcb/frame 0x24f9ce8
bus_set_pass(7fffffff) at bus_set_pass+0x24/frame 0x24f9d00
root_bus_configure(24f9d38,f8c444,0,1b10280,0,...) at
root_bus_configure+0xd/frame 0x24f9d0c
configure(0) at configure+0x8/frame 0x24f9d14
mi_startup() at mi_startup+0x214/frame 0x24f9d38
btext() at btext+0x5f
KDB: enter: panic
[ thread pid 0 tid 100000 ]
Stopped at      kdb_enter+0x34: movl    $0,kdb_why
db> 

So this is a real genuine Intel Pentium II machine with dual sockets.

I will try FreeBSD 13.1 and see what happens on the same hardware. 

Dennis Clarke

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