...

# CONFIG_HOTPLUG is not set

You need CONFIG_HOTPLUG for udev to work correctly, without this option you may not get the device-nodes even if you compiled the right drivers in your kernel.

Thanks for your hint! I set CONFIG_HOTPLUG to 'y'. Also i added some derivative options:

CONFIG_HOTPLUG_PCI=y CONFIG_HOTPLUG_PCI_FAKE=m CONFIG_HOTPLUG_PCI_CPCI=y # CONFIG_HOTPLUG_PCI_CPCI_ZT5550 is not set # CONFIG_HOTPLUG_PCI_CPCI_GENERIC is not set CONFIG_HOTPLUG_PCI_SHPC=m

With them some error messages were disapperred from boot log but the system persists to be dropped into panic after rest of messages:

mount: could not find filesystem /dev/root [...] switchroot: mount failed: No such file or directory Kernel panic - not syncing: No such file or directory

For little debug i unpacked my initrd image and modified 'init' script with several changes:

mount -o defaults --ro -t ext3 sda1 /sysroot showlabels sleep 5

where mount command was given in obvious way with telling of root device (in my case its a /dev/sda1 which also i point it in l4linux26.cfg) and showtables to show what are devices/partitions and their labels are exactly seen by nash. Noone of sd{a|b} devices was listed during of next boot log.

my l4linux26.cfg looks like: sleep 1 task "vmlinuz-2.6.24-l4" "earlyprintk=yes mem=512M ro root=/dev/sda1 l4env_rd=initrd-2.6.24-l4.img" all_sects_writable allow_vga

i even tried to change root=/dev/sda1 with root=LABEL=/ as labeled my /dev/sda1 partition.

I suppose that my mistake could be in absence some kernel options that might be very specific for my hardware configuration:

CPU: Pentium Dual Core, 2GHz RAM: 2048 Mb Chipset: Intel G33 Express HDD: SATA, 250Gb

or there is hypothetical way to 'dig' the problem from some another side ;)

On Thu, 1 May 2008, Adam Lackorzynski wrote:

Hi,

On Wed Apr 30, 2008 at 20:43:17 +0400, Igor V. Ruzanov wrote:

...

...

...

# CONFIG_HOTPLUG is not set

You need CONFIG_HOTPLUG for udev to work correctly, without this option you may not get the device-nodes even if you compiled the right drivers in your kernel.

Thanks for your hint! I set CONFIG_HOTPLUG to 'y'. Also i added some derivative options:

CONFIG_HOTPLUG_PCI=y CONFIG_HOTPLUG_PCI_FAKE=m CONFIG_HOTPLUG_PCI_CPCI=y # CONFIG_HOTPLUG_PCI_CPCI_ZT5550 is not set # CONFIG_HOTPLUG_PCI_CPCI_GENERIC is not set CONFIG_HOTPLUG_PCI_SHPC=m

With them some error messages were disapperred from boot log but the system persists to be dropped into panic after rest of messages:

mount: could not find filesystem /dev/root [...] switchroot: mount failed: No such file or directory Kernel panic - not syncing: No such file or directory

For little debug i unpacked my initrd image and modified 'init' script with several changes:

mount -o defaults --ro -t ext3 sda1 /sysroot showlabels sleep 5

where mount command was given in obvious way with telling of root device (in my case its a /dev/sda1 which also i point it in l4linux26.cfg) and showtables to show what are devices/partitions and their labels are exactly seen by nash. Noone of sd{a|b} devices was listed during of next boot log.

my l4linux26.cfg looks like: sleep 1 task "vmlinuz-2.6.24-l4" "earlyprintk=yes mem=512M ro root=/dev/sda1 l4env_rd=initrd-2.6.24-l4.img" all_sects_writable allow_vga

i even tried to change root=/dev/sda1 with root=LABEL=/ as labeled my /dev/sda1 partition.

I suppose that my mistake could be in absence some kernel options that might be very specific for my hardware configuration:

CPU: Pentium Dual Core, 2GHz RAM: 2048 Mb Chipset: Intel G33 Express HDD: SATA, 250Gb

or there is hypothetical way to 'dig' the problem from some another side ;)

Your hardware does not look special in any way.

Do you see output like

sd 0:0:0:0: [sda] 156301488 512-byte hardware sectors (80026 MB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sda: sda1 sda2

when the modules load? Especially the last line is important as it states that the partitions were found.

No, i don't see such logs. Exactly output of rest of the boot looks like:

[...some messages about loading of usb modules, hotplug configuring...] Loading scsi_mod.ko module SCSI subsystem initialized Loading sd_mod.ko module Driver 'sd' needs updating - please use bus_type methods Loading libata.ko module Loading ahci.ko module Waiting for driver initialization Creating root device Mounting root filesystem mount: could not find filesystem '/dev/root' [...and still several messages about impossibility of mounting /sys and /proc filesystems before terminating of init and panic state...]

I'm trying to research problem towards of PCI probing through mmconfig.. In my kernel config is CONFIG_PCI_GOMMCONFIG=y used. GODIRECT resulted __unknown_pf(). It might be due to some mmconfig failures during l4linux boot and incorrect work of ahci driver as result.

Unfortunately i cannot provide you full log of l4linux boot stages because i haven't any methods (physical COM-port with attached machine as a console with X11 and some console application with text buffering). Does theoretically (at least) mmconfig can make problems within l4env?

Hi, Adam!

On Mon, 5 May 2008, Adam Lackorzynski wrote:

It's not unlikely but I would need to look myself. Can you tell me what the problem with GODIRECT is? That's the mode that is usually supposed to work.

1)First of all i would like to show you my boot log starting from Fiasco loading stage (i all the same attached another machine with xterm via serial cable made by my hands):

Welcome to Fiasco(ia32)! DD-L4(v2)/ia32 microkernel (C) 1998-2008 TU Dresden Rev: r345 compiled with gcc 4.1.1 for Intel Pentium 4 [] Performance-critical config option(s) detected: CONFIG_NDEBUG is off CONFIG_NO_FRAME_PTR is off

Enabling special fully nested mode for PIC Found Local APIC version 0x14 id 0x00 APIC ESR value before/after enabling: 00000000/00000000 Using the Local APIC timer on vector 3d (Periodic Mode) for scheduling SERIAL ESC: allocated IRQ 4 for serial uart SERIAL ESC: allocated IRQ 4 for serial uart Not using serial hack in slow timer handler. Absolute KIP Syscalls using: Sysenter CPU: GenuineIntel (6:F:D:0) Model: Unknown CPU at 1994 MHz

128 Entry I TLB (4K pages) 272 Entry D TLB (4K pages) 48 Entry D TLB (4M pages) 32 KB L1 I Cache (8-way associative, 64 bytes per line) 32 KB L1 D Cache (8-way associative, 64 bytes per line) 1024 KB L2 U Cache (4-way associative, 64 bytes per line)

Freeing init code/data: 24576 bytes (6 pages)

Calibrating timer loop... done. SIGMA0: Hello! KIP @ 1000 Found Fiasco: KIP syscalls: yes allocated 4KB for maintenance structures

Roottask. Command line found: "/boot/l4/linux/bin/roottask task modname "bmodfs" attached 7 modules"

2068156kB (2019MB) total RAM (reported by bootloader) 2001792kB (1955MB) received RAM from Sigma0 16716kB ( 17MB) reserved RAM for RMGR Received I/O ports 0000-ffff Attached irqs = [ <!0> 1 <!2> 3 <!4> 5 6 7 8 9 A B C D E F 10 11 ]

Roottask: Parsing command line config. configured task 0x00 (bmodfs): vm_offs:0 irq:3ffff lmcp:ffff allow_cli:0 mcp:ff prio:10 small:ff mods:7

Roottask: Loading 16 modules. #05: loading "/boot/l4/linux/bin/names" from [06133000-06174da7] to [002d0000-002d6af7][002d7000-002e2000] entry at 0005f374 via trampoline page code symbols at [7abfe000-7ac00000] (8kB), lines at [7abf8000-7abfe000] (24kB) #06: loading "/boot/l4/linux/bin/log --prio 0xA1 --buffer 0" from [06175000-061b5061] to [00400000-0040742a][00408000-0043a848] entry at 00060388 via trampoline page code symbols at [7abf6000-7abf8000] (8kB), lines at [7abf0000-7abf6000] (24kB) #07: loading "/boot/l4/linux/bin/dm_phys --isa=0x00800000" from [061b6000-062520bb] to [01500000-01514c77][01515000-0151f000] entry at 00061384 via trampoline page code symbols at [7abeb000-7abf0000] (20kB), lines at [7abdd000-7abeb000] (56kB) #08: loading "/boot/l4/linux/bin/simple_ts -t 380" from [06253000-062a2673] to [01400000-0140904a][0140a000-01419608] entry at 0006237c via trampoline page code symbols at [7abdb000-7abdd000] (8kB), lines at [7abd3000-7abdb000] (32kB) #09: loading "/boot/l4/linux/bin/rtc" from [062a3000-062d37d9] to [01080000-010847a0][01085000-0108a000] entry at 00063370 via trampoline page code symbols at [7abd1000-7abd3000] (8kB), lines at [7abcc000-7abd1000] (20kB) #0a: loading "/boot/l4/linux/bin/l4io --noirq" from [062d4000-0654611b] to [00c20000-00c46009][00c47000-00cb5000] entry at 00064378 via trampoline page code symbols at [7ab76000-7abcc000] (344kB), lines at [7ab5c000-7ab76000] (104kB) #0b: loading "/boot/l4/linux/bin/bmodfs" from [06547000-065ef96b] to [01220000-01239365][0123a000-01251000] passing module /boot/l4/linux/bin/libloader.s.so [ 065f0000-0668fdd6 ] passing module /boot/l4/linux/cfg/bmodfs.cfg [ 06690000-06690028 ] passing module /boot/l4/linux/cfg/l4linux26.cfg [ 06691000-06691091 ] passing module /boot/l4/linux/bin/run [ 06692000-066e088e ] passing module /boot/l4/linux/bin/libld-l4.s.so [ 066e1000-0675b04c ] passing module /boot/vmlinuz-2.6.24-l4 [ 0675c000-06a03930 ] passing module /boot/initrd-2.6.24-l4.img [ 06a04000-06d7fc00 ] entry at 000664bc via trampoline page code symbols at [7ab57000-7ab5c000] (20kB), lines at [7ab44000-7ab57000] (76kB) #0c: loading "/boot/l4/linux/bin/con --l4io" from [06d80000-06f0c122] to [00b00000-00b52a71][00b53000-00b73000] entry at 00067378 via trampoline page code symbols at [7ab37000-7ab44000] (52kB), lines at [7ab04000-7ab37000] (204kB) #0d: loading "/boot/l4/linux/bin/loader --fprov=BMODFS bmodfs.cfg l4linux26.cfg" from [06f0d000-06fe8821] to [01300000-01329f65][0132a000-01348000] entry at 0006839c via trampoline page code symbols at [7aafd000-7ab04000] (28kB), lines at [7aae3000-7aafd000] (104kB)

ROOT: Sending ports 0070-0070 to task #09 ROOT: Sending ports 0080-0080 to task #09 ROOT: Sending ports 0071-0071 to task #09 simplets| Configured for 380 tasks. rtc | Date:06.05.2008 Time:11:19:03 io | /boot/l4/linux/bin/l4io: unrecognized option `--noirq' loader | Can't map tbuf status page io | Using platform configuration 'x86' ROOT: Sending ports 0cfb-0cfb to task #0a ROOT: Sending ports 0cf8-0cfb to task #0a ROOT: Sending ports 0cfe-0cff to task #0a io | PCI: Using configuration type 1 io | PCI: Probing PCI hardware io | PCI: Probing PCI hardware (bus 00) ROOT: Sending ports 0cfc-0cff to task #0a io | PCI: Unable to handle 64-bit address space for io | PCI: Unable to handle 64-bit address space for io | PCI: Unable to handle 64-bit address space for io | PCI: Unable to handle 64-bit address space for io | PCI: Unable to handle 64-bit address space for io | Transparent bridge - Intel Corporation 82801 PCI Bridge io | PCI: No IRQ known for interrupt pin A of device 00:1c.0. Please try u io : sing pci=biosirq. io | PCI: No IRQ known for interrupt pin B of device 00:1c.1. Please try u io : sing pci=biosirq. io | PCI: No IRQ known for interrupt pin C of device 00:1c.2. Please try u io : sing pci=biosirq. io | PCI: No IRQ known for interrupt pin D of device 00:1c.3. Please try u io : sing pci=biosirq. io | PCI: No IRQ known for interrupt pin A of device 00:1c.4. Please try u io : sing pci=biosirq. io | 00000000-ffffffff : PCI mem io | 80000000-87ffffff : Intel Corporation 82G33/G31 Express Integrated io : Graphics Controller io | 88000000-880fffff : PCI Bus #03 io | 88000000-880001ff : Marvell Technology Group Ltd. 88SE6101 single io : -port PATA133 interface io | 88100000-881fffff : PCI Bus #02 io | 88100000-8811ffff : Intel Corporation 82572EI Gigabit Ethernet Co io : ntroller (Copper) io | 88120000-8813ffff : Intel Corporation 82572EI Gigabit Ethernet Co io : ntroller (Copper) io | 88200000-882fffff : Intel Corporation 82G33/G31 Express Integrated io : Graphics Controller io | 88300000-8837ffff : Intel Corporation 82G33/G31 Express Integrated io : Graphics Controller io | 88380000-883fffff : Intel Corporation 82G33/G31 Express Integrated io : Graphics Controller io | 88400000-8841ffff : Intel Corporation 82801I (ICH9 Family) Gigabit io : Ethernet Controller io | 88420000-88420fff : Intel Corporation 82801I (ICH9 Family) Gigabit io : Ethernet Controller io | 88421000-884217ff : Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 io : port SATA AHCI Controller io | 88421800-88421bff : Intel Co0000-ffff : PCI IO io | 0cf8-0cff : PCI conf1 io | 1000-1fff : PCI Bus #03 io | 1000-100f : Marvell Technology Group Ltd. 88SE6101 single-port PA io : TA133 interface io | 1010-1017 : Marvell Technology Group Ltd. 88SE6101 single-port PA io : TA133 interface io | 1018-101f : Marvell Technology Group Ltd. 88SE6101 single-port PA io : TA133 interface io | 1020-1023 : Marvell Technology Group Ltd. 88SE6101 single-port PA io : TA133 interface io | 1024-1027 : Marvell Technology Group Ltd. 88SE6101 single-port PA io : TA133 interface io | 2000-2fff : PCI Bus #02 io | 2000-201f : Intel Corporation 82572EI Gigabit Ethernet Controller io : (Copper) io | 3000-301f : Intel Corporation 82801I (ICH9 Family) SMBus Controller io | 3020-303f : Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SA io : TA AHCI Controller io | 3040-305f : Intel Corporation 82801I (ICH9 Family) USB UHCI Control io : ler #3 io | 3060-307f : Intel Corporation 82801I (ICH9 Family) USB UHCI Control io : ler #2 io | 3080-309f : Intel Corporation 82801I (ICH9 Family) USB UHCI Control io : ler #1 bmodfs | Passed the following modules: bmodfs | module "/boot/l4/linux/bin/libloader.s.so" (640kB) bmodfs | module "/boot/l4/linux/cfg/bmodfs.cfg" (1kB) bmodfs | module "/boot/l4/linux/cfg/l4linux26.cfg" (1kB) bmodfs | module "/boot/l4/linux/bin/run" (315kB) bmodfs | module "/boot/l4/linux/bin/libld-l4.s.so" (489kB) bmodfs | module "/boot/vmlinuz-2.6.24-l4" (2719kB) bmodfs | module "/boot/initrd-2.6.24-l4.img" (3567kB) con | /boot/l4/linux/bin/con: unrecognized option `--l4io' con | Unrecognized option: - ? con | Usage: /boot/l4/linux/bin/con <options>. Option list: con | [ -h | --help ] - this help con | [ -a | --noaccel ] - disable hardware acceleration con | [ -c | --cpuload ] - show CPU load using rdtsc and rdpmc(0) con | [ -e | --events ] - use event server to free resources con | [ -l | --nolog ] - don't connect to logserver con | [ -m | --nomouse ] - don't transmit mouse events to clients con | [ -n | --nofastmemcpy ] - force to not use fast memcpy con | [ -p | --pan ] - use panning to restrict client window con | [ --noshift ] - no shift key for console switching con | [ -v | --vbemode num ] - set VESA mode (0) con | Error -3 in parse_cmdline() con | Using fast memcpy. loader | run: Starting application using libld-l4.s.so loader | run,#e: Loading binary loader | run,#e: Loading ldso loader | run,#e: Starting libld-l4.s.so at 000138e0 via 0000cc80 loader | sleeping for 1000 ms io | 30a0-30bf : Intel Corporation 82801IAvailable IRQs=[ <!0> 1 <!2> 3 io : <!4> 5 6 7 8 9 a b c d e f 10 11 ] con | Character size is 8x14, font has 256 characters con | VESA reports 1024x768@16 2048bpl (009b) [8128kB] con | Color mapping: red=11:5 green=5:6 blue=0:5 res=0:0 con | No supported accelerated graphics card detected con | Mapped I/O video mem 80000000 => 02000000 [8128kB] via l4io con | Using MMXEXT for colorspace transform con | L4INPUT native mode activated con | L4INPUT: !!! W A R N I N G !!! con | L4INPUT: Please, do not use Fiasco's "-esc" with L4INPUT. con | L4INPUT: !!! W A R N I N G !!! con | L4INPUT: Registered 0xb03f40 for callbacks. ROOT: Sending ports 0060-006f to task #0a con | serio: i8042 AUX port at 0x60,0x64 irq 12 con | serio: i8042 KBD port at 0x60,0x64 irq 1 con | input: AT Translated Set 2 keyboard on isa0060/serio0 con | input: PC Speaker con | input: L4 input event injector con | L4 input event injector: IRQ handler up con | connect "AT Translated Set 2 keyboard", isa0060/serio0/input0 con | connect "PC Speaker", isa0061/input0 con | connect "L4 input event injector", l4/sys con | Running as C.02. Video mode is 1024x768@16. con | vc_loop(): vc[1] running as C.07 con | vc[1] 1024x768@16, bpl:2048, gmode:0x35, evprt:E.03 save:0 run | contxt_init(): 1024x750, cols:128, lines:53, sb_lines:1053 loader | vmlinuz-2.6.24-l4: Starting application using libld-l4.s.so loader | vmlinuz-2.6.24-l4,#f: Loading binary loader | vmlinuz-2.6.24-l4,#f: Loading ldso loader | vmlinuz-2.6.24-l4,#f: Starting libld-l4.s.so at 000138e0 via 0000cc30 l4lx | ======> L4Linux 2.6 starting... <======== l4lx | Linux version 2.6.24-l4 (root@promgaz-bl0) (gcc version 4.1.1 2007010 l4lx : 5 (Red Hat 4.1.1-52)) #45 Tue May 6 13:46:44 MSD 2008 l4lx | Binary name: vmlinuz-2.6.24-l4 l4lx | Linux kernel command line (6 args): earlyprintk=yes mem=128M ro root= l4lx : LABEL=/ pci=conf2 l4env_rd=initrd-2.6.24-l4.img l4lx | Image: 00400000 - 00746000 [3352 KiB]. l4lx | Areas: Text: 00400000 - 0065c000 [2416kB] (a bit longer) l4lx | Data: 0065c000 - 0067ee9c [139kB] l4lx | Initdata: 00682000 - 006a7000 [148kB] l4lx | BSS: 006a8000 - 00743780 [621kB] l4lx | l4lx_thread_create: Created thread 0f.03 (tamer0) l4lx | Tamer0 is 0f.03 l4lx | Using tamed mode. ROOT: Task #0d is not allowed to execute cli/sti loader | vmlinuz-2.6.24-l4,#f: WARNING: Can't map I/O space, ROOT denies page loader : (result=00004000) loader | vmlinuz-2.6.24-l4,#f: Not allowed to perform any I/O l4lx | Got 0 out of 65536 I/O ports l4lx | Connecting to l4io server. l4lx | l4env_linux_startup thread 4. l4lx | l4lx_thread_create: Created thread 0f.04 (cpu0) l4lx | main thread will be 0f.04 l4lx | l4env_register_pointer_section: addr = 00680000 size = 811008 l4lx | sec-w-init: virt: 0x00680000 to 0x00745fff [792 KiB] l4lx | Noncontiguous region for sec-w-init l4lx | sec-w-init: Number of physical regions: 2, 811008 Bytes l4lx | sec-w-init: 1: Phys: 0x0154b000 to 0x015b5000, Size: 434176 l4lx | sec-w-init: 2: Phys: 0x012a4000 to 0x01300000, Size: 376832 l4lx | main thread: received startup message. l4lx | Main thread running, waiting... l4lx | setup_l4env_memory: Forcing superpages for main memory l4lx | Main memory size: 128MB l4lx | Got 2048kB of ISA DMA memory. l4lx | ISA DMA memory: virt: 0x00800000 to 0x009fffff [2048 KiB] l4lx | ISA DMA memory: Number of physical regions: 1, 2097152 Bytes l4lx | ISA DMA memory: 1: Phys: 0x0043b000 to 0x0063b000, Size: 2097152 l4lx | Main memory: virt: 0x00c00000 to 0x08bfffff [131072 KiB] l4lx | Main memory: Number of physical regions: 1, 134217728 Bytes l4lx | Main memory: 1: Phys: 0x07000000 to 0x0f000000, Size: 134217728 l4lx | Filling lower ptabs... l4lx | Done (1654 entries). l4lx | l4env_register_pointer_section: addr = 00680000 size = 811008 l4lx | end: virt: 0x00680000 to 0x00745fff [792 KiB] l4lx | Noncontiguous region for end l4lx | end: Number of physical regions: 2, 811008 Bytes l4lx | end: 1: Phys: 0x0154b000 to 0x015b5000, Size: 434176 l4lx | end: 2: Phys: 0x012a4000 to 0x01300000, Size: 376832 l4lx | l4env_rd_path: initrd-2.6.24-l4.img l4lx | Loading: initrd-2.6.24-l4.img l4lx | INITRD: Size of RAMdisk is 3567KiB l4lx | RAMdisk from 08c00000 to 08f7bc00 [3567KiB] l4lx | l4lx_thread_create: Created thread 0f.05 (timer.i0) l4lx | Jumping over 4x 'hlt' at 0x68adeb l4lx | L4RM: [PF] read at 0xf0cfb000, ip 00697406, src F.02 l4lx | [F.0] l4rm/lib/src/pagefault.c:81:__unknown_pf(): l4lx | unhandled page fault

---------------------------------------------------------IP: a00b53a6 --PANIC, 'g' for exit [l4lx.rm] (f.00) jdb:

It happens every time when CONFIG_PCI_GODIRECT opthion is set. I tried (quiet useless but for experiment clearence) to point pci=conf2 boot option (as in example above) but it didn't led to any good changes. As i can analyze the boot log there are no any error messages showing the need to fix someting in L4 configs.

2)Below i provide OBJDUMP output with trapped address by __unknown_pf(): 006972a9 <pci_direct_probe>: pci_direct_probe(): /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:269 6972a9: 55 push %ebp 6972aa: 89 e5 mov %esp,%ebp 6972ac: 57 push %edi 6972ad: 56 push %esi 6972ae: 53 push %ebx 6972af: 83 ec 20 sub $0x20,%esp /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:272 6972b2: f6 05 60 81 67 00 02 testb $0x2,0x678160 6972b9: 0f 84 aa 00 00 00 je 697369 <pci_direct_probe+0xc0> /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:274 6972bf: c7 44 24 14 70 d8 63 movl $0x63d870,0x14(%esp) 6972c6: 00 6972c7: c7 44 24 0c 08 00 00 movl $0x8,0xc(%esp) 6972ce: 00 6972cf: c7 44 24 10 00 00 00 movl $0x0,0x10(%esp) 6972d6: 00 6972d7: c7 44 24 04 f8 0c 00 movl $0xcf8,0x4(%esp) 6972de: 00 6972df: c7 44 24 08 00 00 00 movl $0x0,0x8(%esp) 6972e6: 00 6972e7: c7 04 24 00 42 66 00 movl $0x664200,(%esp) 6972ee: e8 d4 1d d8 ff call 4190c7 <__request_region> 6972f3: 89 c7 mov %eax,%edi /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:275 6972f5: 85 c0 test %eax,%eax 6972f7: 74 70 je 697369 <pci_direct_probe+0xc0> /usr/src/kernels/2.6-24-l4/build/include/asm-l4/l4-arch/asm/irqflags.h:68 6972f9: e8 b3 ad d6 ff call 4020b1 <l4x_global_save_flags> 6972fe: 89 c3 mov %eax,%ebx /usr/src/kernels/2.6-24-l4/build/include/asm-l4/l4-arch/asm/irqflags.h:78 697300: e8 b7 ae d6 ff call 4021bc <l4x_global_cli> /usr/src/kernels/2.6-24-l4/build/include/asm-l4/l4-arch/asm/io.h:359 697305: b0 01 mov $0x1,%al 697307: ba fb 0c 00 00 mov $0xcfb,%edx 69730c: ee out %al,(%dx)

----^---__unknown_pf() when boot option was pci=conf1 //// /usr/src/kernels/2.6-24-l4/build/include/asm-l4/l4-arch/asm/io.h:361 69730d: b2 f8 mov $0xf8,%dl 69730f: ed in (%dx),%eax 697310: 89 45 f0 mov %eax,0xfffffff0(%ebp) 697313: b8 00 00 00 80 mov $0x80000000,%eax 697318: ef out %eax,(%dx) 697319: ed in (%dx),%eax /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:228 69731a: 3d 00 00 00 80 cmp $0x80000000,%eax 69731f: 75 13 jne 697334 <pci_direct_probe+0x8b> 697321: b8 a4 7f 67 00 mov $0x677fa4,%eax 697326: be 01 00 00 00 mov $0x1,%esi 69732b: e8 a4 fe ff ff call 6971d4 <pci_sanity_check> 697330: 85 c0 test %eax,%eax 697332: 75 02 jne 697336 <pci_direct_probe+0x8d> 697334: 31 f6 xor %esi,%esi /usr/src/kernels/2.6-24-l4/build/include/asm-l4/l4-arch/asm/io.h:361 697336: ba f8 0c 00 00 mov $0xcf8,%edx 69733b: 8b 45 f0 mov 0xfffffff0(%ebp),%eax 69733e: ef out %eax,(%dx) /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:232 69733f: 85 db test %ebx,%ebx 697341: 75 09 jne 69734c <pci_direct_probe+0xa3> /usr/src/kernels/2.6-24-l4/build/include/asm-l4/l4-arch/asm/irqflags.h:73 697343: c7 04 24 00 00 00 00 movl $0x0,(%esp) 69734a: eb 03 jmp 69734f <pci_direct_probe+0xa6> 69734c: 89 1c 24 mov %ebx,(%esp) 69734f: e8 4f af d6 ff call 4022a3 <l4x_global_restore_flags> /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:278 697354: b8 01 00 00 00 mov $0x1,%eax 697359: 85 f6 test %esi,%esi 69735b: 0f 85 23 01 00 00 jne 697484 <pci_direct_probe+0x1db> /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:280 697361: 89 3c 24 mov %edi,(%esp) 697364: e8 c9 16 d8 ff call 418a32 <release_resource> /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:283 697369: f6 05 60 81 67 00 04 testb $0x4,0x678160 697370: 0f 84 0c 01 00 00 je 697482 <pci_direct_probe+0x1d9> /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:285 697376: c7 44 24 14 7a d8 63 movl $0x63d87a,0x14(%esp) 69737d: 00 69737e: c7 44 24 0c 04 00 00 movl $0x4,0xc(%esp) 69737e: c7 44 24 0c 04 00 00 movl $0x4,0xc(%esp) 697385: 00 697386: c7 44 24 10 00 00 00 movl $0x0,0x10(%esp) 69738d: 00 69738e: c7 44 24 04 f8 0c 00 movl $0xcf8,0x4(%esp) 697395: 00 697396: c7 44 24 08 00 00 00 movl $0x0,0x8(%esp) 69739d: 00 69739e: c7 04 24 00 42 66 00 movl $0x664200,(%esp) 6973a5: e8 1d 1d d8 ff call 4190c7 <__request_region> 6973aa: 89 45 ec mov %eax,0xffffffec(%ebp) /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:286 6973ad: 85 c0 test %eax,%eax 6973af: 0f 84 cd 00 00 00 je 697482 <pci_direct_probe+0x1d9> /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:288 6973b5: c7 44 24 14 7a d8 63 movl $0x63d87a,0x14(%esp) 6973bc: 00 6973bd: c7 44 24 0c 00 10 00 movl $0x1000,0xc(%esp) 6973c4: 00 6973c5: c7 44 24 10 00 00 00 movl $0x0,0x10(%esp) 6973cc: 00 6973cd: c7 44 24 04 00 c0 00 movl $0xc000,0x4(%esp) 6973d4: 00 6973d5: c7 44 24 08 00 00 00 movl $0x0,0x8(%esp) 6973dc: 00 6973dd: c7 04 24 00 42 66 00 movl $0x664200,(%esp) 6973e4: e8 de 1c d8 ff call 4190c7 <__request_region> 6973e9: 89 c7 mov %eax,%edi /usr/src/kernels/2.6-24-l4/arch/l4/pci/../../x86/pci/direct.c:289 6973eb: 85 c0 test %eax,%eax 6973ed: 0f 84 84 00 00 00 je 697477 <pci_direct_probe+0x1ce> /usr/src/kernels/2.6-24-l4/build/include/asm-l4/l4-arch/asm/irqflags.h:68 6973f3: e8 b9 ac d6 ff call 4020b1 <l4x_global_save_flags> 6973f8: 89 c6 mov %eax,%esi /usr/src/kernels/2.6-24-l4/build/include/asm-l4/l4-arch/asm/irqflags.h:78 6973fa: e8 bd ad d6 ff call 4021bc <l4x_global_cli> /usr/src/kernels/2.6-24-l4/build/include/asm-l4/l4-arch/asm/io.h:359 6973ff: 31 c0 xor %eax,%eax 697401: ba fb 0c 00 00 mov $0xcfb,%edx 697406: ee out %al,(%dx) ----^---__unknown_pf() when boot option was pci=conf2

pci_direct_probe() function causes page fault in both cases (pci=conf1/2) via writing of byte to port addressed by DX. I can guess that the DX contain 0xf0cfb000 (like above - in both cases pci=conf1/2).

3)To determine to what port was access that caused __unknown_pf exception i was booting into "real" kernel environment and told lspci -vv: 00:00.0 Host bridge: Intel Corporation DRAM Controller (rev 02) Subsystem: Intel Corporation Unknown device 5044 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ >SERR- <PERR- Latency: 0 Capabilities: [e0] Vendor Specific Information

00:02.0 VGA compatible controller: Intel Corporation Integrated Graphics Controller (rev 02) (prog-if 00 [VGA]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin A routed to IRQ 11 Region 0: Memory at 88380000 (32-bit, non-prefetchable) [size=512K] Region 1: I/O ports at 3430 [size=8] Region 2: Memory at 80000000 (32-bit, prefetchable) [size=128M] Region 3: Memory at 88200000 (32-bit, non-prefetchable) [size=1M] Capabilities: [90] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Address: 00000000 Data: 0000 Capabilities: [d0] Power Management version 2 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:02.1 Display controller: Intel Corporation Integrated Graphics Controller (rev 02) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Region 0: Memory at 88300000 (32-bit, non-prefetchable) [size=512K] Capabilities: [d0] Power Management version 2 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:03.0 Communication controller: Intel Corporation HECI Controller (rev 02) Subsystem: Intel Corporation Unknown device 5044 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin A routed to IRQ 11 Region 0: Memory at 88422100 (64-bit, non-prefetchable) [size=16] Capabilities: [50] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [8c] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable- Address: 0000000000000000 Data: 0000

00:19.0 Ethernet controller: Intel Corporation Gigabit Ethernet Controller (rev 02) Subsystem: Intel Corporation Unknown device 0001 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin A routed to IRQ 217 Region 0: Memory at 88400000 (32-bit, non-prefetchable) [size=128K] Region 1: Memory at 88420000 (32-bit, non-prefetchable) [size=4K] Region 2: I/O ports at 3400 [size=32] Capabilities: [c8] Power Management version 2 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=1 PME- Capabilities: [d0] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable+ Address: 00000000fee0100c Data: 414a Capabilities: [e0] Vendor Specific Information

00:1a.0 USB Controller: Intel Corporation USB UHCI Controller #4 (rev 02) (prog-if 00 [UHCI]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin A routed to IRQ 18 Region 4: I/O ports at 30e0 [size=32] Capabilities: [50] Vendor Specific Information

00:1a.1 USB Controller: Intel Corporation USB UHCI Controller #5 (rev 02) (prog-if 00 [UHCI]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin B routed to IRQ 20 Region 4: I/O ports at 30c0 [size=32] Capabilities: [50] Vendor Specific Information

00:1a.2 USB Controller: Intel Corporation USB UHCI Controller #6 (rev 02) (prog-if 00 [UHCI]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin C routed to IRQ 16 Region 4: I/O ports at 30a0 [size=32] Capabilities: [50] Vendor Specific Information

00:1a.7 USB Controller: Intel Corporation USB2 EHCI Controller #2 (rev 02) (prog-if 20 [EHCI]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin C routed to IRQ 16 Region 0: Memory at 88421c00 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [58] Debug port Capabilities: [98] Vendor Specific Information

00:1c.0 PCI bridge: Intel Corporation PCI Express Port 1 (rev 02) (prog-if 00 [Normal decode]) Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0, Cache Line Size: 64 bytes Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR- BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B- Capabilities: [40] Express Root Port (Slot+) IRQ 0 Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag- Device: Latency L0s <64ns, L1 <1us Device: Errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+ Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- Device: MaxPayload 128 bytes, MaxReadReq 128 bytes Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s L1, Port 1 Link: Latency L0s <1us, L1 <4us Link: ASPM Disabled RCB 64 bytes CommClk- ExtSynch- Link: Speed 2.5Gb/s, Width x0 Slot: AtnBtn- PwrCtrl- MRL- AtnInd- PwrInd- HotPlug+ Surpise+ Slot: Number 1, PowerLimit 10.000000 Slot: Enabled AtnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- Slot: AttnInd Unknown, PwrInd Unknown, Power- Root: Correctable- Non-Fatal- Fatal- PME- Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Address: fee0300c Data: 41c9 Capabilities: [90] #0d [0000] Capabilities: [a0] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [100] Virtual Channel Capabilities: [180] Unknown (5)

00:1c.1 PCI bridge: Intel Corporation PCI Express Port 2 (rev 02) (prog-if 00 [Normal decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0, Cache Line Size: 64 bytes Bus: primary=00, secondary=02, subordinate=02, sec-latency=0 I/O behind bridge: 00002000-00002fff Memory behind bridge: 88100000-881fffff Prefetchable memory behind bridge: 0000000088500000-0000000088500000 Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B- Capabilities: [40] Express Root Port (Slot+) IRQ 0 Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag- Device: Latency L0s <64ns, L1 <1us Device: Errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+ Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- Device: MaxPayload 128 bytes, MaxReadReq 128 bytes Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s L1, Port 2 Link: Latency L0s <256ns, L1 <4us Link: ASPM Disabled RCB 64 bytes CommClk+ ExtSynch- Link: Speed 2.5Gb/s, Width x1 Slot: AtnBtn- PwrCtrl- MRL- AtnInd- PwrInd- HotPlug+ Surpise+ Slot: Number 2, PowerLimit 10.000000 Slot: Enabled AtnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- Slot: AttnInd Unknown, PwrInd Unknown, Power- Root: Correctable- Non-Fatal- Fatal- PME- Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Address: fee0300c Data: 41d1 Capabilities: [90] #0d [0000] Capabilities: [a0] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [100] Virtual Channel Capabilities: [180] Unknown (5)

00:1c.2 PCI bridge: Intel Corporation PCI Express Port 3 (rev 02) (prog-if 00 [Normal decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0, Cache Line Size: 64 bytes Bus: primary=00, secondary=03, subordinate=03, sec-latency=0 I/O behind bridge: 00001000-00001fff Memory behind bridge: 88000000-880fffff Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR- BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B- Capabilities: [40] Express Root Port (Slot+) IRQ 0 Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag- Device: Latency L0s <64ns, L1 <1us Device: Errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+ Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- Device: MaxPayload 128 bytes, MaxReadReq 128 bytes Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s L1, Port 3 Link: Latency L0s <256ns, L1 <4us Link: ASPM Disabled RCB 64 bytes CommClk+ ExtSynch- Link: Speed 2.5Gb/s, Width x1 Slot: AtnBtn- PwrCtrl- MRL- AtnInd- PwrInd- HotPlug+ Surpise+ Slot: Number 3, PowerLimit 10.000000 Slot: Enabled AtnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- Slot: AttnInd Unknown, PwrInd Unknown, Power- Root: Correctable- Non-Fatal- Fatal- PME- Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Address: fee0300c Data: 41d9 Capabilities: [90] #0d [0000] Capabilities: [a0] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [100] Virtual Channel Capabilities: [180] Unknown (5)

00:1c.3 PCI bridge: Intel Corporation PCI Express Port 4 (rev 02) (prog-if 00 [Normal decode]) Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0, Cache Line Size: 64 bytes Bus: primary=00, secondary=04, subordinate=04, sec-latency=0 Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR- BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B- Capabilities: [40] Express Root Port (Slot+) IRQ 0 Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag- Device: Latency L0s <64ns, L1 <1us Device: Errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+ Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- Device: MaxPayload 128 bytes, MaxReadReq 128 bytes Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s L1, Port 4 Link: Latency L0s <1us, L1 <4us Link: ASPM Disabled RCB 64 bytes CommClk- ExtSynch- Link: Speed 2.5Gb/s, Width x0 Slot: AtnBtn- PwrCtrl- MRL- AtnInd- PwrInd- HotPlug+ Surpise+ Slot: Number 4, PowerLimit 10.000000 Slot: Enabled AtnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- Slot: AttnInd Unknown, PwrInd Unknown, Power- Root: Correctable- Non-Fatal- Fatal- PME- Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Address: fee0300c Data: 41e1 Capabilities: [90] #0d [0000] Capabilities: [a0] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [100] Virtual Channel Capabilities: [180] Unknown (5)

00:1c.4 PCI bridge: Intel Corporation PCI Express Port 5 (rev 02) (prog-if 00 [Normal decode]) Control: I/O- Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0, Cache Line Size: 64 bytes Bus: primary=00, secondary=05, subordinate=05, sec-latency=0 Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort+ <SERR- <PERR- BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B- Capabilities: [40] Express Root Port (Slot+) IRQ 0 Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag- Device: Latency L0s <64ns, L1 <1us Device: Errors: Correctable+ Non-Fatal+ Fatal+ Unsupported+ Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop- Device: MaxPayload 128 bytes, MaxReadReq 128 bytes Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s L1, Port 5 Link: Latency L0s <1us, L1 <4us Link: ASPM Disabled RCB 64 bytes CommClk- ExtSynch- Link: Speed 2.5Gb/s, Width x0 Slot: AtnBtn- PwrCtrl- MRL- AtnInd- PwrInd- HotPlug+ Surpise+ Slot: Number 5, PowerLimit 10.000000 Slot: Enabled AtnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- Slot: AttnInd Unknown, PwrInd Unknown, Power- Root: Correctable- Non-Fatal- Fatal- PME- Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Address: fee0300c Data: 41e9 Capabilities: [90] #0d [0000] Capabilities: [a0] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [100] Virtual Channel Capabilities: [180] Unknown (5)

00:1d.0 USB Controller: Intel Corporation USB UHCI Controller #1 (rev 02) (prog-if 00 [UHCI]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin A routed to IRQ 21 Region 4: I/O ports at 3080 [size=32] Capabilities: [50] Vendor Specific Information

00:1d.1 USB Controller: Intel Corporation USB UHCI Controller #2 (rev 02) (prog-if 00 [UHCI]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin B routed to IRQ 19 Region 4: I/O ports at 3060 [size=32] Capabilities: [50] Vendor Specific Information

00:1d.2 USB Controller: Intel Corporation USB UHCI Controller #3 (rev 02) (prog-if 00 [UHCI]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin C routed to IRQ 18 Region 4: I/O ports at 3040 [size=32] Capabilities: [50] Vendor Specific Information

00:1d.7 USB Controller: Intel Corporation USB2 EHCI Controller #1 (rev 02) (prog-if 20 [EHCI]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin A routed to IRQ 21 Region 0: Memory at 88421800 (32-bit, non-prefetchable) [size=1K] Capabilities: [50] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [58] Debug port Capabilities: [98] Vendor Specific Information

00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) (prog-if 01 [Subtractive decode]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Bus: primary=00, secondary=06, subordinate=06, sec-latency=32 Secondary status: 66MHz- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR- BridgeCtl: Parity- SERR- NoISA+ VGA- MAbort- >Reset- FastB2B- Capabilities: [50] #0d [0000]

00:1f.0 ISA bridge: Intel Corporation Unknown device 2916 (rev 02) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Capabilities: [e0] Vendor Specific Information

00:1f.2 SATA controller: Intel Corporation 6 port SATA AHCI Controller (rev 02) (prog-if 01 [AHCI 1.0]) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0 Interrupt: pin A routed to IRQ 218 Region 0: I/O ports at 3428 [size=8] Region 1: I/O ports at 343c [size=4] Region 2: I/O ports at 3420 [size=8] Region 3: I/O ports at 3438 [size=4] Region 4: I/O ports at 3020 [size=32] Region 5: Memory at 88421000 (32-bit, non-prefetchable) [size=2K] Capabilities: [80] Message Signalled Interrupts: 64bit- Queue=0/4 Enable+ Address: fee0100c Data: 4142 Capabilities: [70] Power Management version 3 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot+,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Capabilities: [a8] #12 [0010] Capabilities: [b0] Vendor Specific Information

00:1f.3 SMBus: Intel Corporation SMBus Controller (rev 02) Subsystem: Intel Corporation Unknown device 5044 Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Interrupt: pin B routed to IRQ 18 Region 0: Memory at 88422000 (64-bit, non-prefetchable) [size=256] Region 4: I/O ports at 3000 [size=32]

02:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet Controller (Copper) (rev 06) Subsystem: Intel Corporation PRO/1000 PT Desktop Adapter Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 16 Region 0: Memory at 88120000 (32-bit, non-prefetchable) [size=128K] Region 1: Memory at 88100000 (32-bit, non-prefetchable) [size=128K] Region 2: I/O ports at 2000 [size=32] Expansion ROM at 88500000 [disabled] [size=128K] Capabilities: [c8] Power Management version 2 Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=1 PME- Capabilities: [d0] Message Signalled Interrupts: 64bit+ Queue=0/0 Enable- Address: 0000000000000000 Data: 0000 Capabilities: [e0] Express Endpoint IRQ 0 Device: Supported: MaxPayload 256 bytes, PhantFunc 0, ExtTag- Device: Latency L0s <512ns, L1 <64us Device: AtnBtn- AtnInd- PwrInd- Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported- Device: RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop+ Device: MaxPayload 128 bytes, MaxReadReq 512 bytes Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s, Port 0 Link: Latency L0s <4us, L1 <64us Link: ASPM Disabled RCB 64 bytes CommClk+ ExtSynch- Link: Speed 2.5Gb/s, Width x1 Capabilities: [100] Advanced Error Reporting Capabilities: [140] Device Serial Number 53-03-05-ff-ff-21-1b-00

03:00.0 IDE interface: Marvell Technology Group Ltd. Unknown device 6101 (rev b2) (prog-if 8f [Master SecP SecO PriP PriO]) Subsystem: Marvell Technology Group Ltd. Unknown device 6101 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 18 Region 0: I/O ports at 1018 [size=8] Region 1: I/O ports at 1024 [size=4] Region 2: I/O ports at 1010 [size=8] Region 3: I/O ports at 1020 [size=4] Region 4: I/O ports at 1000 [size=16] Region 5: Memory at 88000000 (32-bit, non-prefetchable) [size=512] Capabilities: [48] Power Management version 2 Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0+,D1+,D2-,D3hot+,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=1 PME- Capabilities: [50] Message Signalled Interrupts: 64bit- Queue=0/0 Enable- Address: 00000000 Data: 0000 Capabilities: [e0] Express Legacy Endpoint IRQ 0 Device: Supported: MaxPayload 128 bytes, PhantFunc 0, ExtTag- Device: Latency L0s unlimited, L1 unlimited Device: AtnBtn- AtnInd- PwrInd- Device: Errors: Correctable- Non-Fatal- Fatal- Unsupported- Device: RlxdOrd- ExtTag- PhantFunc- AuxPwr+ NoSnoop- Device: MaxPayload 128 bytes, MaxReadReq 512 bytes Link: Supported Speed 2.5Gb/s, Width x1, ASPM L0s, Port 0 Link: Latency L0s <256ns, L1 unlimited Link: ASPM Disabled RCB 64 bytes CommClk+ ExtSynch- Link: Speed 2.5Gb/s, Width x1 Capabilities: [100] Advanced Error Reporting

where i didn't find any devices bound to a region containig the 0xf0cfb000. Maybe you could analyze mentioned command outputs and find where could i mistake exactly.

Thank you fo your patience!

Ah, now I got it I think. You need to allow L4Linux to access those ports, i.e. add 'ioport [ 0x0cf8, 0x0cff ]' to the loader config script to allow access to the PCI ports. That should fix it. For other devices this works equally.

I've added command ioport to l4linux26.cfg: sleep 1 task "vmlinuz-2.6.24-l4" "earlyprintk=yes mem=128M root=LABEL=/ l4env_rd=initrd-2.6.24-l4.img" ioport [ 0x0cf8, 0x0cff ] all_sects_writable allow_vga allow_cli

but it still comes to old behaviour, with the same failure: l4lx | L4RM: [PF] read at 0xf0cfb000, ip 0069730c, src F.02 l4lx | [F.0] l4rm/lib/src/pagefault.c:81:__unknown_pf(): l4lx | unhandled page fault

I've built L4Env and L4Linux in Debian system (runned for a long time) under VMware. In this case everything was going allmost fine. Comparing the logs:

Physical machine: =================

l4lx | Using tamed mode. ROOT: Task #0d is not allowed to execute cli/sti loader | vmlinuz-2.6.24-l4,#f: WARNING: Can't map I/O space, ROOT denies page loader : (result=00004000) loader | vmlinuz-2.6.24-l4,#f: Not allowed to perform any I/O l4lx | Got 0 out of 65536 I/O ports l4lx | Connecting to l4io server. l4lx | l4env_linux_startup thread 4. l4lx | l4lx_thread_create: Created thread 0f.04 (cpu0) l4lx | main thread will be 0f.04

VMware: ======= l4lx | Using tamed mode. l4lx | Connecting to l4io server. l4lx | l4env_linux_startup thread 4. l4lx | l4lx_thread_create: Created thread 0c.04 (cpu0) l4lx | main thread will be 0c.04

i.e. in the first case its seen that l4linux isn't allowed by loader to map I/O space. Could it be like the symptom of such L4Linux behaviour in the first case? I even made identical (except con- and rtc-server presented in GRUB's menu.lst on physical machine) configs - l4linux26.cfg and L4Linux loading section in menu.lst.

On Wed May 07, 2008 at 16:36:16 +0400, Igor V. Ruzanov wrote:

Adam,

...

i.e. add 'ioport [ 0x0cf8, 0x0cff ]' to the loader config script to allow access to the PCI ports. That should fix it. For other devices this works equally.

I've allmost won at the problem after 'learning' of 'weird' strings loader | vmlinuz-2.6.24-l4,#f: WARNING: Can't map I/O space, ROOT denies page loader : (result=00004000) loader | vmlinuz-2.6.24-l4,#f: Not allowed to perform any I/O

for some time and remember about Fiasco configuration. There is the interesting option: [ ] Enable I/O port protection

that i activated it before. And when i unset this option (as it looks like above) and rebuild Fiasco, sd_mod had determined partinions on sda drive during L4Linux boot. Now everything is going fine untill boot

Heh, I/O port protection is a feature, not the other way around. :) What I forgot to mention previously is that you also need to add 'task modname "loader" allow_cli' to the roottask command line so that roottask is giving out those rights to the loader (sorry).

Adam

Hi, Adam!

Now the "health" of my L4-system is OK and i'm running a series of tests for checking of stress stability of L4Linux. But i would like to ask you the following questions:

1)Currently i start only one instance, but how can i switch between 1-st console (hypervisor cmd line) and 2-nd console (where L4Linux is running)? I tried to send Shift+F1 in order to switch to 1-st console but it didn't work.

2)How does reboot process of L4Linux look like? When i'm saing 'reboot' to the L4Linux, then its going into 6-th runlevel, shutting down all running processes and i'm dropping to 1-st console automatically forever. My log (its last part) shows:

during running instance: [...] l4lx | l4env_rd_path: drops-l4.img l4lx | Loading: drops-l4.img l4lx | INITRD: Size of RAMdisk is 70000KiB l4lx | RAMdisk from 41000000 to 4545c000 [70000KiB] l4lx | l4lx_thread_create: Created thread 0f.05 (timer.i0) l4lx | Jumping over 4x 'hlt' at 0x7ccdeb l4lx | idler0: utcb=0xbff00400 0f.04 l4lx | l4lx_thread_create: Created thread 0f.06 (idler0) l4lx | Starting L4FB via CON con | vc_loop(): vc[2] running as C.08 l4lx | l4lx_thread_create: Created thread 0f.07 (L4ConInput) con | vc[2] 1024x768@16, bpl:2048, gmode:0x35, evprt:F.07 save:0 l4lx | l4fb:con: 1024x750@16 2bypp, size: 1540096 l4lx | l4fb:con 5:6:5 11:5:0 linelen=2048 visual=2 con | Mapped client FB to 00400000 size 00178000 l4lx | l4lx_thread_create: Created thread 0f.08 (CON refresher) l4lx | l4lx_irq_dev_startup_hw: Starting IRQ thread for IRQ 11. l4lx | l4lx_thread_create: Created thread 0f.09 (IRQ11) l4lx | l4lx_irq_dev_startup_hw: Starting IRQ thread for IRQ 9. l4lx | l4lx_thread_create: Created thread 0f.0a (IRQ9) l4lx | l4lx_irq_dev_startup_hw: Starting IRQ thread for IRQ 10. l4lx | l4lx_thread_create: Created thread 0f.0b (IRQ10)

and then when i entered 'reboot': l4lx | Terminating L4Linux. simplets| Exit F.02 con | switch_vc(): switch to vc 01 con | background_vc(): exception 2.2 sending background event to F.07

Is it possible the instance was automatically rebooted after reboot command?

3)And when i stay in the 1-st console (hypervisor itself), my keyboard doesn't respond - is that because of absence of some options of fiasco module in my config file?

...

3)And when i stay in the 1-st console (hypervisor itself), my keyboard doesn't respond - is that because of absence of some options of fiasco module in my config file?

Do you mean that 'run' is running there? Does keyboard input work in L4Linux? If it's working there it should also work in run because it's the same wrt the keyboard driver.

I use USB-keyboard (my machine has no PS/2 socket). When i successfully booted into L4Linux first time i couldn't type inside of instance (even when i used init=/bin/sh boot option) but i could work in run. Then i've added HID devices support into .config and recompiled the L4Linux kernel. Now it's working good inside of L4Linux but i can't type in 1-st console when application has exited, for example. Probably its common symptom for switching between consoles too (RightAlt-F1 or RightShift-F1 hasn't turned out from 2-nd opened console). Is it correctly to suppose that i have still another keyboard driver that addresses to my keyboard from L4Linux directly through EHCI/OHCI subsystem?

Adam

Adam adam@os.inf.tu-dresden.de Lackorzynski http://os.inf.tu-dresden.de/~adam/

---

l4-hackers mailing list l4-hackers@os.inf.tu-dresden.de http://os.inf.tu-dresden.de/mailman/listinfo/l4-hackers

...

...

Do you mean that 'run' is running there? Does keyboard input work in L4Linux? If it's working there it should also work in run because it's the same wrt the keyboard driver.

I use USB-keyboard (my machine has no PS/2 socket). When i successfully booted into L4Linux first time i couldn't type inside of instance (even when i used init=/bin/sh boot option) but i could work in run. Then i've added HID devices support into .config and recompiled the L4Linux kernel. Now it's working good inside of L4Linux but i can't type in 1-st console when application has exited, for example. Probably its common symptom for switching between consoles too (RightAlt-F1 or RightShift-F1 hasn't turned out from 2-nd opened console). Is it correctly to suppose that i have still another keyboard driver that addresses to my keyboard from L4Linux directly through EHCI/OHCI subsystem?

Yes, if you enable USB support in L4Linux than the USB host controller will be reset and the USB legacy support will not work anymore. What you can do is also start the usbhid server (usbhid package) which implements the USB keyboard/mouse driver. Do not enable USB in L4Linux then. With usbhid the system should also work with USB keyboard and mouse.

I recently (more precisely, yesterday) knew about your package of usbhid server;) But as i know its not available via svn and i tried to get it from your server as usbhid-20071107.tar.gz tarball. I couldn't build the package because of few compilation errors in /usr/src/DROPS/tudos/l4/pkg/usbhid/server/lib-linux/contrib/input/input.c such as: /usr/src/DROPS/tudos/l4/pkg/usbhid/server/lib-linux/contrib/input/input.c:43: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'this_object_must_be_defined_as_export_objs_in_the_Makefile

The code causing such errors is

EXPORT_SYMBOL(input_register_device); EXPORT_SYMBOL(input_unregister_device); EXPORT_SYMBOL(input_register_handler); EXPORT_SYMBOL(input_unregister_handler); EXPORT_SYMBOL(input_register_minor); EXPORT_SYMBOL(input_unregister_minor); EXPORT_SYMBOL(input_open_device); EXPORT_SYMBOL(input_close_device); EXPORT_SYMBOL(input_event);

which maybe explains about that this version of usbhid was developed under other kernel version. Could you please provide a patch fixing the build process under 2.6.24-l4?