Alpine Linux Milk-V Duo Test Report

Test Environment

Operating System Information

System Version: 3.19_alpha20230901 / 3.20.3 riscv64
Download Link:
- https://github.com/cwt/duo-buildroot-sdk/releases/download/poc1/MilkV-Duo-alpine.img.xz
Note: This image is provided by community developers and is not an official image.

(Alternatively):
- Alpine minirootfs: https://alpinelinux.org/downloads/
- Official Buildroot image: https://github.com/milkv-duo/duo-buildroot-sdk/releases
Reference Installation Document:

Hardware Information

Milk-V Duo
A USB-A to C or USB-C to C cable
A microSD card
A microSD card reader
A USB to UART debugger (e.g., CH340, CH341, FT2232, etc.)
Optional: Milk-V Duo IOB (Baseboard)

Installation Steps

Method A: Flash community image

Download the prebuilt community image: https://github.com/cwt/duo-buildroot-sdk/releases/download/poc1/MilkV-Duo-alpine.img.xz Then flash it with

xz -d MilkV-Duo-alpine.img.xz
sudo dd if=MilkV-Duo-alpine.img of=/dev/your/device bs=1M status=progress

Method B: Build and flash your own rootfs

Alternatively, you can also build your own image by replacing relevant content in existing images for the Duo with Alpine’s official rootfs.

Download Alpine minirootfs and Buildroot image

wget https://dl-cdn.alpinelinux.org/alpine/v3.20/releases/riscv64/alpine-minirootfs-3.20.3-riscv64.tar.gz
tar -xvf alpine-minirootfs-3.20.3-riscv64.tar.gz --one-top-level
wget https://github.com/milkv-duo/duo-buildroot-sdk/releases/download/v1.1.3/milkv-duo-sd-v1.1.3-2024-0930.img.zip
unzip milkv-duo-sd-v1.1.3-2024-0930.img.zip

Prepare rootfs

Note that the obtained Alpine system is only a “minirootfs” without system packages such as OpenRC. We need to install Alpine’s base packages using apk inside the rootfs in order to make it bootable.

Install Alpine’s package manager `apk`

Skip this step if using Alpine-based distributions on host. Otherwise install apk-tools on your distribution (e.g. on Arch Linux: sudo pacman -S apk-tools).

run apk --help to verify installation.

Install Alpine’s base package `alpine-base` inside minirootfs

(chroot is NOT required)

cd alpine-minirootfs-3.20.3-riscv64
sudo apk add -p . --initdb -U --arch riscv64 --allow-untrusted alpine-base

Extra setups

Edit ./etc/inittab and add the following line (or uncomment) to enable serial access on /dev/ttyS0:
```
ttyS0::respawn:/sbin/getty -L 115200 ttyS0 vt100
```
And comment out the six lines starting with tty1 - tty6.
Edit ./etc/passwd:

Remove the x in root:x:0:0:root:/root:/bin/sh.

(Alternatively, edit /etc/shadow and remove the * in root:*::0:::::).
Enable the OpenRC hostname service (for setting up the hostname correctly)：
```
ln -s ./etc/init.d/hostname ./etc/runlevels/boot
```
You may enable other OpenRC system services of interest likewise.

Flash Buildroot image

cd ..
sudo dd if=milkv-duo-sd-v1.1.3-2024-0930.img of=/dev/your/device bs=4M status=progress

Your device should now be able to detect the rootfs and boot partitions on the SD card. Mount only the rootfs partition.

Replace root on SD card with Alpine rootfs

rm -rf /path/to/your/mnt/root/*
cp -r /path/to/your/alpine-minirootfs-3.20.3-riscv64/* /path/to/your/mnt/root/

Booting and Logging into the System

Insert SD card onto the board and boot. Login into the system via serial port at /dev/ttyUSB0, baudrate 115200.

Default username: root Default password: none

Optional post-installation setups

Setup the password and hostname with passwd and hostname after login.

Setup the system time with date -s, then install cronyd:

apk add cronyd
rc-update add chronyd default

It is recommended to enable the following system OpenRC services (though test results show that the system will still be able to boot nevertheless):

rc-update add bootmisc boot
rc-update add networking boot # make sure /etc/network/interfaces is present
rc-update add devfs sysinit
rc-update add mdev sysinit
rc-update add acpid default
rc-update add killprocs shutdown
rc-update add mount-ro shutdown
rc-update add savecache shutdown

Expected Results

The system should boot normally and allow login through the onboard serial port.

Actual Results

The system booted successfully, and login through the onboard serial port was also successful.

Boot Log

Method A example

   OpenRC 0.51 is starting up Linux 5.10.4-tag- (riscv64)

 * Mounting /proc ... [ ok ]
 * Mounting /run ... [ ok ]
 * /run/openrc: creating directory
 * /run/lock: creating directory
 * /run/lock: correcting owner
[    1.744315] random: fast init done
Service `hwdrivers' needs non existent service `dev'
Service `machine-id' needs non existent service `dev'
 * Caching service dependencies ... [ ok ]
 * Clock skew detected with `/etc/init.d'
 * Adjusting mtime of `/run/openrc/deptree' to Wed Oct 25 12:24:45 2023

 * WARNING: clock skew detected!
 * WARNING: clock skew detected!
[    2.856766] cv180x_pwm: bad vermagic: kernel tainted.
[    2.862103] Disabling lock debugging due to kernel taint
[    2.867650] cv180x_pwm: loading out-of-tree module taints kernel.
 * Loading modules ...[    3.092709] res-reg: start: 0xa0c8000, end: 0xa0c801f, virt-addr(ffffffd0042a1000).
[    3.101162] CVITEK CHIP ID = 22
[    3.122044] cvi_rtos_cmdqu_probe start ---
[    3.126419] name=1900000.rtos_cmdqu
[    3.130321] res-reg: start: 0x1900000, end: 0x1900fff, virt-addr(ffffffd0042b6000).
[    3.138366] cvi_rtos_cmdqu_probe DONE
[    3.142435] [cvi_spinlock_init] success
[    3.366529] RTOS_CMDQU_SEND_WAIT timeout
[    3.370632] SYS_CMD_INFO_LINUX_INIT_DONE fail
[    3.375186] communicate with rtos fail
[    3.400375] cif a0c2000.cif: cam0 clk installed
[    3.405169] cif a0c2000.cif: cam1 clk installed
[    3.409918] cif a0c2000.cif: vip_sys_2 clk installed
[    3.415112] cif a0c2000.cif: clk_mipimpll clk installed (____ptrval____)
[    3.422097] cif a0c2000.cif: clk_disppll clk installed (____ptrval____)
[    3.428994] cif a0c2000.cif: clk_fpll clk installed (____ptrval____)
[    3.435621] cif a0c2000.cif: (0) res-reg: start: 0xa0c2000, end: 0xa0c3fff.
[    3.442851] cif a0c2000.cif:  virt-addr((____ptrval____))
[    3.448476] cif a0c2000.cif: (1) res-reg: start: 0xa0d0000, end: 0xa0d0fff.
[    3.455703] cif a0c2000.cif:  virt-addr((____ptrval____))
[    3.461328] cif a0c2000.cif: (2) res-reg: start: 0xa0c4000, end: 0xa0c5fff.
[    3.468555] cif a0c2000.cif:  virt-addr((____ptrval____))
[    3.474180] cif a0c2000.cif: (3) res-reg: start: 0x3001c30, end: 0x3001c5f.
[    3.481407] cif a0c2000.cif:  virt-addr((____ptrval____))
[    3.487019] cif a0c2000.cif: no pad_ctrl for cif
[    3.491905] cif a0c2000.cif: request irq-26 as cif-irq0
[    3.497417] cif a0c2000.cif: request irq-27 as cif-irq1
[    3.502913] cif a0c2000.cif: rst_pin = 424, pol = 1
[    3.523593] snsr_i2c snsr_i2c: i2c:-------hook 0
[    3.528631] snsr_i2c snsr_i2c: i2c:-------hook 1
[    3.533575] snsr_i2c snsr_i2c: i2c:-------hook 2
[    3.538538] snsr_i2c snsr_i2c: i2c:-------hook 3
[    3.543471] snsr_i2c snsr_i2c: i2c:-------hook 4
[    3.598874] vi_core_probe:203(): res-reg: start: 0xa000000, end: 0xa07ffff, virt-addr(ffffffd004480000).
[    3.608759] vi_core_probe:216(): irq(28) for isp get from platform driver.
[    3.616433] vi_tuning_buf_setup:253(): tuning fe_addr[0]=0x8169f490, be_addr[0]=0x81697290, post_addr[0]=0x81680000
[    3.627370] vi_tuning_buf_setup:253(): tuning fe_addr[1]=0x8165f490, be_addr[1]=0x81657290, post_addr[1]=0x81640000
[    3.638276] vi_tuning_buf_setup:253(): tuning fe_addr[2]=0x8167f490, be_addr[2]=0x81677290, post_addr[2]=0x81660000
[    3.649128] sync_task_init:177(): sync_task_init vi_pipe 0
[    3.654834] sync_task_init:177(): sync_task_init vi_pipe 1
[    3.660530] sync_task_init:177(): sync_task_init vi_pipe 2
[    3.666831] vi_core_probe:252(): isp registered as cvi-vi
[    3.738895] cvi_dwa_probe:487(): done with rc(0).
[    3.796083] cv180x-cooling cv180x_cooling: elems of dev-freqs=6
[    3.802358] cv180x-cooling cv180x_cooling: dev_freqs[0]: 850000000 500000000
[    3.809710] cv180x-cooling cv180x_cooling: dev_freqs[1]: 425000000 375000000
[    3.817030] cv180x-cooling cv180x_cooling: dev_freqs[2]: 425000000 300000000
[    3.824451] cv180x-cooling cv180x_cooling: Cooling device registered: cv180x_cooling
[    3.887420] jpu ctrl reg pa = 0xb030000, va = (____ptrval____), size = 256
[    3.895048] end jpu_init result = 0x0
[    4.010054] cvi_vc_drv_init result = 0x0
 [ ok ]
 * Activating swap devices ...[    4.222544] Adding 65532k swap on /dev/mmcblk0p3.  Priority:-2 extents:1 across:65532k SSDsc
 [ ok ]
 * Checking local filesystems  ... [ ok ]
 * Remounting filesystems ...[    4.659028] EXT4-fs (mmcblk0p2): re-mounted. Opts: discard
 [ ok ]
 * Mounting local filesystems ... [ ok ]
 * Loading zram module...
[    5.196337] zram: Added device: zram0
 [ ok ]
 * Swap->zram0
[    5.307208] zram0: detected capacity change from 0 to 33554432
[    8.358561] Adding 32764k swap on /dev/zram0.  Priority:16383 extents:1 across:32764k SSDsc
 [ ok ]
 * WARNING: clock skew detected!
 * /run/dhcpcd: creating directory
 * Starting dhcpcd ... [ ok ]
[    9.042260] random: dhcpcd: uninitialized urandom read (40 bytes read)
 * Setting hostname ... [ ok ]
[    9.706759] bm-dwmac 4070000.ethernet eth0: PHY [stmmac-0:00] driver [Generic PHY] (irq=POLL)
[    9.734618] dwmac1000: Master AXI performs any burst length
[    9.745607] bm-dwmac 4070000.ethernet eth0: No Safety Features support found
[    9.764674] bm-dwmac 4070000.ethernet eth0: IEEE 1588-2002 Timestamp supported
 * Starting networking ...[    9.781062] bm-dwmac 4070000.ethernet eth0: configuring for phy/rmii link mode
 *   lo ... [ ok ]
 *   eth0 ...sending commands to dhcpcd process
 [ ok ]
 * Starting chronyd ...[   15.700583] random: chronyd: uninitialized urandom read (3 bytes read)
[   15.707454] random: chronyd: uninitialized urandom read (1024 bytes read)
 [ ok ]
 * Starting dropbear ... [ ok ]
 * Configuring kernel parameters ...sysctl: error: 'net.ipv4.tcp_syncookies' is an unknown key
sysctl: error: 'kernel.unprivileged_bpf_disabled' is an unknown key
 [ ok ]
0 file(s)
2 in ep
1 out ep
[   16.486902] using random self ethernet address
[   16.491691] using random host ethernet address
1 file(s)
[   16.583275] usb0: HOST MAC 6e:c8:69:3c:9e:af
[   16.590810] usb0: MAC d6:80:67:ff:c9:b9
[   16.598575] dwc2 4340000.usb: bound driver configfs-gadget
[   17.431319] random: dnsmasq: uninitialized urandom read (128 bytes read)
[   17.438507] random: dnsmasq: uninitialized urandom read (48 bytes read)
 * Starting dnsmasq ...[   17.475029] random: dnsmasq: uninitialized urandom read (128 bytes read)
 [ ok ]

Welcome to Alpine!

The Alpine Wiki contains a large amount of how-to guides and general
information about administrating Alpine systems.
See <https://wiki.alpinelinux.org/>.

You can setup the system with the command: setup-alpine

You may change this message by editing /etc/motd.

login[881]: root login on 'console'
milkv-duo:~# uname -a
Linux milkv-duo 5.10.4-tag- #1 PREEMPT Tue Oct 24 10:20:29 UTC 2023 riscv64 Linux
milkv-duo:~# cat /etc/os-release 
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.19_alpha20230901
PRETTY_NAME="Alpine Linux edge"
HOME_URL="https://alpinelinux.org/"
BUG_REPORT_URL="https://gitlab.alpinelinux.org/alpine/aports/-/issues"
milkv-duo:~#

Method B example

   OpenRC 0.54 is starting up Linux 5.10.4-tag- (riscv64)

 * Mounting /proc ... [ ok ]
 * Mounting /run ... [ ok ]
 * /run/openrc: creating directory
 * /run/lock: creating directory
 * /run/lock: correcting owner
[    1.660531] random: fast init done
 * Caching service dependencies ... [ ok ]
 * Caching service dependencies ... [ ok ]
 * Clock skew detected with `/etc/init.d'
 * Adjusting mtime of `/run/openrc/deptree' to Wed Nov  6 12:40:12 2024

 * WARNING: clock skew detected!
 * Remounting devtmpfs on /dev ... [ ok ]
 * Mounting /dev/mqueue ... [ ok ]
 * Mounting /dev/pts ... [ ok ]
 * Mounting /dev/shm ... [ ok ]
 * Mounting /sys ... [ ok ]
 * Mounting debug filesystem ... [ ok ]
 * Mounting config filesystem ... [ ok ]
 * Starting busybox mdev ... [ ok ]
 * Scanning hardware for mdev ... [ ok ]
 * WARNING: clock skew detected!
 * Checking local filesystems  ... [ ok ]
 * Remounting filesystems ... [ ok ]
 * Mounting local filesystems ... [ ok ]
 * Creating user login records ... [ ok ]
 * Cleaning /tmp directory ... [ ok ]
 * Setting hostname ... [ ok ]
 * Starting networking ...ifquery: could not parse /etc/network/interfaces
 * ERROR: networking failed to start
 * WARNING: clock skew detected!
 * Starting networking ...ifquery: could not parse /etc/network/interfaces
 * ERROR: networking failed to start
 * Starting busybox acpid ... [ ok ]

Welcome to Alpine Linux 3.20
Kernel 5.10.4-tag- on an riscv64 (/dev/ttyS0)

localhost login: root
Welcome to Alpine!

The Alpine Wiki contains a large amount of how-to guides and general
information about administrating Alpine systems.
See <https://wiki.alpinelinux.org/>.

You can setup the system with the command: setup-alpine

You may change this message by editing /etc/motd.

login[734]: root login on 'ttyS0'
localhost:~# uname -a
Linux localhost 5.10.4-tag- #1 PREEMPT Mon Sep 30 18:01:49 CST 2024 riscv64 Linux
localhost:~# cat /etc/os-release 
NAME="Alpine Linux"
ID=alpine
VERSION_ID=3.20.3
PRETTY_NAME="Alpine Linux v3.20"
HOME_URL="https://alpinelinux.org/"
BUG_REPORT_URL="https://gitlab.alpinelinux.org/alpine/aports/-/issues"
localhost:~#

Test Criteria

Successful: The actual result matches the expected result.

Failed: The actual result does not match the expected result.

Test Conclusion

Test successful.

System Version

Status

Last Update

Alpine Linux Milk-V Duo Test Report

Test Environment

Operating System Information

Hardware Information

Installation Steps

Method A: Flash community image

Method B: Build and flash your own rootfs

Download Alpine minirootfs and Buildroot image

Prepare rootfs

Install Alpine’s package manager `apk`

Install Alpine’s base package `alpine-base` inside minirootfs

Extra setups

Flash Buildroot image

Replace root on SD card with Alpine rootfs

Booting and Logging into the System

Optional post-installation setups

Expected Results

Actual Results

Boot Log

Method A example

Method B example

Test Criteria

Test Conclusion

System Version

Status

Last Update

Alpine Linux Milk-V Duo Test Report

Test Environment

Operating System Information

Hardware Information

Installation Steps

Method A: Flash community image

Method B: Build and flash your own rootfs

Download Alpine minirootfs and Buildroot image

Prepare rootfs

Install Alpine’s package manager apk

Install Alpine’s base package alpine-base inside minirootfs

Extra setups

Flash Buildroot image

Replace root on SD card with Alpine rootfs

Booting and Logging into the System

Optional post-installation setups

Expected Results

Actual Results

Boot Log

Method A example

Method B example

Test Criteria

Test Conclusion

Install Alpine’s package manager `apk`

Install Alpine’s base package `alpine-base` inside minirootfs