Arm-dev January 2019

arm-dev@lists.centos.org

8 participants
13 discussions

rng-tools missing and /dev/hwrng without driver
by SW＠EU 31 Oct '25

31 Oct '25

Hi, today I will report a problem that is released to ipa-server. This server contains a certificate authority and such service need many entropy. The default on CentOS 7 on a Banana PI is not enough, i.e. $(cat /proc/sys/kernel/random/entropy_avail) is less than 1000. I have solved this in meantime by installing and enabling of haveged from the EPEL repository. Normally it would be done by installing the rng-tools. But there are two problems: 1. The rng-tools was not in the repositories, so I have downloaded rng-tools-5-8.fc24.armv7hl.rpm because this are the same version which is included in CentOS 7.3 for x86_64. 2. This rng-tools are usable but the daemon starts and stops immediately with the following error message: # rngd -v /dev/hwrng: No such device /dev/tpm0: No such file or directory No entropy sources found, exiting This is not the problem of this binary it is a problem of the Kernel. /dev/hwrng exists and if I remove it then it reappears after reboot, but # ls -l /dev/hwrng crw-------. 1 root root 10, 183 1. Jan 1970 /dev/hwrng # udevadm info -a -n /dev/hwrng Udevadm info starts with the device specified by the devpath and then walks up the chain of parent devices. It prints for every device found, all possible attributes in the udev rules key format. A rule to match, can be composed by the attributes of the device and the attributes from one single parent device. looking at device '/devices/virtual/misc/hw_random': KERNEL=="hw_random" SUBSYSTEM=="misc" DRIVER=="" ATTR{rng_current}=="none" ATTR{rng_available}=="" there is no driver for this device. I have searched and found this link http://forum.lemaker.org/thread-23618-1-1.html which includes a link to the full story. If I read all right then on bananian /dev/hwrng appears only if the adapted or a more actual sun4i-ss.ko module is loaded (there is written: "module author has indicated this will be going into the mainline kernel shortly“). This module is also loaded on a Banana PI with current CentOS 7. So does the kernel of CentOS 7.3 for ARM32 include this patch and if yes why it does not work or otherwise why this device appears but has no driver? TIA, Silvio Sent with [ProtonMail](https://protonmail.com) Secure Email.

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EPEL repo not available?
by Boyd Ako 31 Oct '25

31 Oct '25

Can anybody verify that the EPEL repo for ARMHFP isn’t available? I keep getting an error saying the REPOMD file isn’t there when running yum. It works if I use —disablerepo=epel\* when using yum. But, there might be some stuff in the EPEL that I’m looking for. Running it on a Raspberry Pi 3 and trying to get Nagios installed for home use. Domo, Boyd H. Ako boyd.hanalei.ako(a)gmail.com (424) 244-9653 https://www.boydhanaleiako.me “Coming together is a beginning. Keeping together is progress. Working together is success.” -Henry Ford PGP/GPG Public Key: https://sks-keyservers.net/pks/lookup?op=get&search=0xC58073B21618F134

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Gigabyte MP30-AR0
by Gordan Bobic 31 Oct '25

31 Oct '25

Hi, I am toying with the idea of getting a Gigabyte MP30-AR0 board (despite the insanely exorbitant price tag). Has anyone got the aarch64 CentOS working on one of those? Any special instructions? Also, if I get the ISO, is it bootable on aarch64? Does the installer work? Or does the image have to be used like on 32-bit ARM? Thanks. Gordan

13 203

centos 7 64 bit on raspberry Pi 3
by R 23 Sep '20

23 Sep '20

Hello, I was wondering if there is a procedure for installing Centos 7 on the Raspberry Pi 3 B+ while installing Centos 7.5 on armhfp is very clear and documented given that a raw root image is provided and you just "dd" it on the memory card, it is not clear to me how to do it with aarch64. A ISO image is provided but how to install it on the raspberry ? thank you Rick

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epel-release
by Robert Moskowitz 30 Jun '20

30 Jun '20

Ok, I see this epel-release in the epel1 repo that I installed via the wiki. So I decide to install it, and it created an epel.repo.rpmnew file. I swicth around the files and try a 'yum update' and get: epel/armhfp/metalink | 47 kB 00:00 Could not parse metalink https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=armhfp error was No repomd file One of the configured repositories failed (Unknown), and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: .... File /var/cache/yum/armhfp/7/epel/metalink.xml does not exist So I put everything back.

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Re: [Arm-dev] Add Marvell Armada7k8k NIC (mvpp2) support patches
by Marcin Wojtas 26 May '20

26 May '20

Hi Jim, It's been a while, since I sent the patch. Any objections about merging? Is v4.11 kernel still a valid baseline or for the next releases or we should use v4.14? When is that transition and next release supposed to happen? Best regards, Marcinsob., 23 cze 2018 o 08:18 Marcin Wojtas <mw(a)semihalf.com> napisał(a): > > Hi, > > I'm sending a patch that is applicable on top of the kernel > sig-altarch7-aarch64 branch. It enables ACPI support for the Marvell > Armada7k8k NIC - this required backporting very big amount of patches > (all merged upstream), hence I decided to attach the single commit, > instead of issueing 'git send-email' of it. > > Despite many attempts I wasn't able to build entire rpm package with > the mock build utility, however I managed to test the clean kernel > v4.11 with applied all patches and built with updated .config. Please > let know if this patch is sufficient and can be merged. > > Thanks, > Marcin

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Different issues with "DTOVERLAY".
by Stephan Guilloux 26 Feb '19

26 Feb '19

Hello, Small issues, today, with dtoverlay gpio-shutdown/poweroff [root@mypi ~]# dtoverlay gpio-shutdown su: user pi does not exist * Failed to apply overlay '1_gpio-shutdown' (kernel) su: user pi does not exist [root@mypi ~]# dtoverlay gpio-poweroff su: user pi does not exist su: user pi does not exist [root@mypi ~]# Even if I add a fake user "PI", this does not work better. [root@mypi ~]# useradd -r pi -p pi [root@mypi ~]# [root@mypi ~]# [root@mypi ~]# dtoverlay gpio-poweroff * Failed to apply overlay '2_gpio-poweroff' (kernel) [root@mypi ~]# dtoverlay gpio-shutdown * Failed to apply overlay '2_gpio-shutdown' (kernel) [root@mypi ~]# But when I check the overlay list, I get: [root@mypi ~]# dtoverlay -l Overlays (in load order): 0: gpio-shutdown 1: gpio-poweroff [root@mypi ~]# At least, something is done :-) Last problems: [root@mypi ~]# dtoverlay -h gpio-shutdown * Help file not found [root@mypi ~]# dtoverlay -h gpio-poweroff * Help file not found [root@mypi ~]# dtoverlay -h rpi-rtc * Help file not found [root@mypi ~]# dtoverlay -h rpi-display * Help file not found [root@mypi ~]# In case ... [root@mypi ~]# cat /proc/version Linux version 4.14.65-v7.1.el7 (mockbuild(a)armhfp-03.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-28) (GCC)) #1 SMP Mon Aug 20 19:04:20 UTC 2018 [root@mypi ~]# [root@mypi ~]# rpm -qa 'raspberrypi-vc*' raspberrypi-vc-demo-source-20170705-502.gitaa39775.el7.noarch raspberrypi-vc-libs-20170705-502.gitaa39775.el7.armv7hl raspberrypi-vc-utils-20170705-502.gitaa39775.el7.armv7hl [root@mypi ~]# Stephan.

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Chrooting/Docker to armv7hl and armv5tel on aarch64
by Gordan Bobic 28 Jan '19

28 Jan '19

It's been so long since I last had to do this, that it looks like a kernel update somewhere along the way broke this for me. :-( What happens now: # chroot rs7 chroot: failed to run command ‘/bin/bash’: Exec format error I could have sworn that this was all I needed to make this work last time: # grep 4K_PAGES config-4.9.153-1.el7.centos.aarch64 CONFIG_ARM64_4K_PAGES=y # CONFIG_ARM64_64K_PAGES is not set Unfortunately, now trying to chroot into either hard-float or soft-float chroot results in the exec format error. Looking at time stamps of various things, I had this working with 4.4.70, but have since switched to 4.9.x kernels. Any thoughts on what changed between 4.4 and 4.9 would be most appreciated. What am I missing?

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How to get uboot information
by Robert Moskowitz 11 Jan '19

11 Jan '19

Is there a command that gets me the uboot information I see displayed on the serial console at boot time. For example: U-Boot SPL 2016.09.01 (Oct 19 2016 - 13:46:44) and U-Boot 2016.09.01 (Oct 19 2016 - 13:46:44 +0000) Allwinner Technology thanks

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Problems installing yum-utils on one system
by Robert Moskowitz 09 Jan '19

09 Jan '19

I have yum-utils on two systems, but for some reason, it has dependency issues on another. [root@onlo rgm]# yum install yum-utils Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile Resolving Dependencies --> Running transaction check ---> Package yum-utils.noarch 0:1.1.31-50.el7 will be installed --> Processing Dependency: python-kitchen for package: yum-utils-1.1.31-50.el7.noarch --> Processing Dependency: libxml2-python for package: yum-utils-1.1.31-50.el7.noarch --> Running transaction check ---> Package libxml2-python.armv7hl 0:2.9.1-6.el7_2.3 will be installed --> Processing Dependency: libxml2 = 2.9.1-6.el7_2.3 for package: libxml2-python-2.9.1-6.el7_2.3.armv7hl ---> Package python-kitchen.noarch 0:1.1.1-5.el7 will be installed --> Processing Dependency: python-chardet for package: python-kitchen-1.1.1-5.el7.noarch --> Running transaction check ---> Package libxml2-python.armv7hl 0:2.9.1-6.el7_2.3 will be installed --> Processing Dependency: libxml2 = 2.9.1-6.el7_2.3 for package: libxml2-python-2.9.1-6.el7_2.3.armv7hl ---> Package python-chardet.noarch 0:2.2.1-1.el7_1 will be installed --> Finished Dependency Resolution Error: Package: libxml2-python-2.9.1-6.el7_2.3.armv7hl (base) Requires: libxml2 = 2.9.1-6.el7_2.3 Installed: libxml2-2.9.1-6.el7.3.armv7hl (@centos-base_rbf) libxml2 = 2.9.1-6.el7.3 Available: libxml2-2.9.1-6.el7_2.3.armv7hl (base) libxml2 = 2.9.1-6.el7_2.3 You could try using --skip-broken to work around the problem You could try running: rpm -Va --nofiles --nodigest What do I need to do to get it installed? thanks

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Arm-dev January 2019