[Qemu-devel] Ubuntu 14.04 LTS Arm for Raspberry

Hi Andrew,

I got your contact from Peter Maydell on the IRC channel #qemu.

I would like to submit the following bug affecting the Raspberry 2 platform under the specified os.

Let me explain what I'm trying to do and where I'm failing:

1. I'm using the "official" arm ubuntu 14.04 (https://wiki.ubuntu.com/ARM/RaspberryPi) - you can download the image from that link and follow the instruction to flash a SD card.... yes I'm using the SD card instead of the image on the host. The reason is I want to emulate the RPi with its real SD card.

2. after copying the kernel7.img and the bcm2709-rpi-2-b.dtb file into a "boot" folder, I use the following command with the lastest (up to one day ago) qemu:

qemu-system-arm \

-kernel boot/kernel7.img \

-dtb boot/bcm2709-rpi-2-b.dtb \

-M raspi2 -m 256 \

-no-reboot -serial stdio \

-append "rw earlyprintk loglevel=8 console=ttyAMA0,115200 dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 panic=1 rootfstype=ext4" \

-hda /dev/sdb \

-net nic -net user,net=10.0.0.0/8,host=10.0.0.1,hostfwd=tcp:127.0.0.1:2222-10.0.0.2:22

note that in this particular case I'm using /dev/sdb (which is the SD card). You can adjust accordingly.

If you try the following command this is the expected output:

WARNING: Image format was not specified for '/dev/sdb' and probing guessed raw.

Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted.

Specify the 'raw' format explicitly to remove the restrictions.

Warning: hub port hub0port0 has no peer

Warning: vlan 0 with no nics

Warning: netdev hub0port0 has no peer

Warning: requested NIC (anonymous, model unspecified) was not created (not supported by this machine?)

Uncompressing Linux... done, booting the kernel.

[ 0.000000] Booting Linux on physical CPU 0xf00

[ 0.000000] Initializing cgroup subsys cpuset

[ 0.000000] Initializing cgroup subsys cpu

[ 0.000000] Initializing cgroup subsys cpuacct

[ 0.000000] Linux version 3.18.0-20-rpi2 (address@hidden) (gcc version 4.8.2 (Ubuntu/Linaro 4.8.2-19ubuntu1) ) #21-Ubuntu SMP PREEMPT Sun Apr 5 01:56:02 UTC 2015 (Ubuntu 3.18.0-20.21-rpi2 3.18.11)

[ 0.000000] CPU: ARMv7 Processor [412fc0f1] revision 1 (ARMv7), cr=10c5387d

[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache

[ 0.000000] Machine model: Raspberry Pi 2 Model B

[ 0.000000] bootconsole [earlycon0] enabled

[ 0.000000] cma: Reserved 8 MiB at 0x0f800000

[ 0.000000] Memory policy: Data cache writealloc

[ 0.000000] On node 0 totalpages: 65536

[ 0.000000] free_area_init_node: node 0, pgdat 8095cc40, node_mem_map 8f5f3000

[ 0.000000] Normal zone: 512 pages used for memmap

[ 0.000000] Normal zone: 0 pages reserved

[ 0.000000] Normal zone: 65536 pages, LIFO batch:15

[ 0.000000] [bcm2709_smp_init_cpus] enter (85c0->f3003010)

[ 0.000000] [bcm2709_smp_init_cpus] ncores=4

[ 0.000000] PERCPU: Embedded 11 pages/cpu @8f5c1000 s12928 r8192 d23936 u45056

[ 0.000000] pcpu-alloc: s12928 r8192 d23936 u45056 alloc=11*4096

[ 0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3

[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024

[ 0.000000] Kernel command line: rw earlyprintk loglevel=8 console=ttyAMA0,115200 dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 panic=1 rootfstype=ext4

[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)

[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)

[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)

[ 0.000000] allocated 524288 bytes of page_cgroup

[ 0.000000] please try 'cgroup_disable=memory' option if you don't want memory cgroups

[ 0.000000] Memory: 240468K/262144K available (6339K kernel code, 564K rwdata, 2352K rodata, 364K init, 806K bss, 21676K reserved)

[ 0.000000] Virtual kernel memory layout:

[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)

[ 0.000000] fixmap : 0xffc00000 - 0xffe00000 (2048 kB)

[ 0.000000] vmalloc : 0x90800000 - 0xff000000 (1768 MB)

[ 0.000000] lowmem : 0x80000000 - 0x90000000 ( 256 MB)

[ 0.000000] modules : 0x7f000000 - 0x80000000 ( 16 MB)

[ 0.000000] .text : 0x80008000 - 0x80884f4c (8692 kB)

[ 0.000000] .init : 0x80885000 - 0x808e0000 ( 364 kB)

[ 0.000000] .data : 0x808e0000 - 0x8096d2ec ( 565 kB)

[ 0.000000] .bss : 0x8096d2ec - 0x80a36d20 ( 807 kB)

[ 0.000000] Preemptible hierarchical RCU implementation.

[ 0.000000] RCU dyntick-idle grace-period acceleration is enabled.

[ 0.000000] NR_IRQS:480

[ 0.000000] Architected cp15 timer(s) running at 19.20MHz (virt).

[ 0.000771] sched_clock: 56 bits at 19MHz, resolution 52ns, wraps every 3579139424256ns

[ 0.002598] Switching to timer-based delay loop, resolution 52ns

[ 0.035758] Console: colour dummy device 80x30

[ 0.038813] Calibrating delay loop (skipped), value calculated using timer frequency.. 38.40 BogoMIPS (lpj=76800)

[ 0.043079] pid_max: default: 32768 minimum: 301

[ 0.048556] Security Framework initialized

[ 0.063027] AppArmor: AppArmor initialized

[ 0.063841] Yama: becoming mindful.

[ 0.076510] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)

[ 0.078315] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)

[ 0.120839] Initializing cgroup subsys memory

[ 0.123174] Initializing cgroup subsys devices

[ 0.124319] Initializing cgroup subsys freezer

[ 0.125414] Initializing cgroup subsys net_cls

[ 0.127000] Initializing cgroup subsys blkio

[ 0.127930] Initializing cgroup subsys perf_event

[ 0.128884] Initializing cgroup subsys net_prio

[ 0.131767] CPU: Testing write buffer coherency: ok

[ 0.183628] CPU0: update cpu_capacity 1024

[ 0.186458] CPU0: thread -1, cpu 0, socket 15, mpidr 80000f00

[ 0.188520] [bcm2709_smp_prepare_cpus] enter

[ 0.196432] Setting up static identity map for 0x6064c8 - 0x606520

[ 0.408138] [bcm2709_boot_secondary] cpu:1 failed to start (85c0)

[ 1.639690] CPU1: failed to come online

[ 1.692001] [bcm2709_boot_secondary] cpu:2 failed to start (85c0)

[ 2.938004] CPU2: failed to come online

[ 2.956738] [bcm2709_boot_secondary] cpu:3 failed to start (85c0)

[ 4.188338] CPU3: failed to come online

[ 4.193769] Brought up 1 CPUs

[ 4.197829] SMP: Total of 1 processors activated (38.40 BogoMIPS).

[ 4.203740] CPU: All CPU(s) started in SVC mode.

[ 4.261739] devtmpfs: initialized

[ 4.533546] VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0

[ 4.719236] pinctrl core: initialized pinctrl subsystem

[ 4.799254] NET: Registered protocol family 16

[ 4.869787] DMA: preallocated 4096 KiB pool for atomic coherent allocations

[ 4.907457] cpuidle: using governor ladder

[ 4.915191] cpuidle: using governor menu

[ 4.918278] bcm2709.uart_clock = 3000000

[ 4.969190] ------------[ cut here ]------------

[ 4.972886] WARNING: CPU: 0 PID: 1 at /build/buildd/linux-3.18.0/arch/arm/mach-bcm2709/armctrl.c:148 armctrl_xlate+0x188/0x274()

[ 4.978230] Modules linked in:

[ 4.981441] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-20-rpi2 #21-Ubuntu

[ 4.990070] [<80016ab0>] (unwind_backtrace) from [<800129d0>] (show_stack+0x10/0x14)

[ 4.994280] [<800129d0>] (show_stack) from [<805fee10>] (dump_stack+0x9c/0xd4)

[ 4.998113] [<805fee10>] (dump_stack) from [<80026ed8>] (warn_slowpath_common+0x70/0x8c)

[ 5.001953] [<80026ed8>] (warn_slowpath_common) from [<80026f90>] (warn_slowpath_null+0x1c/0x24)

[ 5.005774] [<80026f90>] (warn_slowpath_null) from [<80022044>] (armctrl_xlate+0x188/0x274)

[ 5.007766] [<80022044>] (armctrl_xlate) from [<8007399c>] (irq_create_of_mapping+0x64/0x110)

[ 5.010351] [<8007399c>] (irq_create_of_mapping) from [<804c4ef4>] (irq_of_parse_and_map+0x24/0x2c)

[ 5.012473] [<804c4ef4>] (irq_of_parse_and_map) from [<804c4f14>] (of_irq_to_resource+0x18/0xb8)

[ 5.015119] [<804c4f14>] (of_irq_to_resource) from [<804c4ff0>] (of_irq_to_resource_table+0x3c/0x54)

[ 5.017399] [<804c4ff0>] (of_irq_to_resource_table) from [<804c25b8>] (of_device_alloc+0xd8/0x180)

[ 5.020123] [<804c25b8>] (of_device_alloc) from [<804c26a8>] (of_platform_device_create_pdata+0x48/0x98)

[ 5.022308] [<804c26a8>] (of_platform_device_create_pdata) from [<804c27f0>] (of_platform_bus_create+0xec/0x3ac)

[ 5.025277] [<804c27f0>] (of_platform_bus_create) from [<804c2860>] (of_platform_bus_create+0x15c/0x3ac)

[ 5.027468] [<804c2860>] (of_platform_bus_create) from [<804c2c28>] (of_platform_populate+0x5c/0xa0)

[ 5.030213] [<804c2c28>] (of_platform_populate) from [<8088cad8>] (bcm2709_init+0x64/0x3fc)

[ 5.032380] [<8088cad8>] (bcm2709_init) from [<80888870>] (customize_machine+0x20/0x40)

[ 5.034808] [<80888870>] (customize_machine) from [<800088bc>] (do_one_initcall+0xd8/0x208)

[ 5.036873] [<800088bc>] (do_one_initcall) from [<80885ef4>] (kernel_init_freeable+0x1fc/0x29c)

[ 5.039536] [<80885ef4>] (kernel_init_freeable) from [<805f9298>] (kernel_init+0x8/0xf0)

[ 5.041458] [<805f9298>] (kernel_init) from [<8000efe8>] (ret_from_fork+0x14/0x2c)

[ 5.044239] ---[ end trace 8c9564437c6fb249 ]---

[ 5.086808] No ATAGs?

[ 5.090020] hw-breakpoint: found 5 (+1 reserved) breakpoint and 4 watchpoint registers.

[ 5.092933] hw-breakpoint: maximum watchpoint size is 8 bytes.

[ 5.095000] mailbox: Broadcom VideoCore Mailbox driver

[ 5.105398] bcm2708_vcio: mailbox at f300b880

[ 5.109543] bcm_power: Broadcom power driver

[ 5.111766] bcm_power_open() -> 0

[ 5.112687] bcm_power_request(0, 8)

and then the process stops (just paralyze - aka deadlock).

Is this helping you a bit to understand the problem?

Let me know if you need more data or help,

From:	Vincenzo Calabrò
Subject:	[Qemu-devel] Ubuntu 14.04 LTS Arm for Raspberry - QEMU Support
Date:	Wed, 16 Mar 2016 20:38:33 +0100

[Qemu-devel] Ubuntu 14.04 LTS Arm for Raspberry - QEMU Support