Arm-dev November 2017

arm-dev@lists.centos.org

9 participants
8 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

4 3

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

Kernel problems on APM X-Gene
by Gordan Bobic 29 Jan '18

29 Jan '18

Apologies for taking so long to return to this thread, it took way longer than expected to get to the machine and get it up and running again. I also just updated the build to the latest 4.9.60. Here is a download link to both binaries and src.rpm (download the kernel tarball from kernel.org manually to build from src.rpm): http://ftp.redsleeve.org/pub/misc/kernel/aarch64/RPMS/ http://ftp.redsleeve.org/pub/misc/kernel/aarch64/SRPMS/ To recap - I am also running with Tianocore EFI chain-loaded from u-boot, and mainling 4.9.x boots just fine on it. No need for disabling ACPI on the kernel command line, no need to run EFI firmware as a 1st stage boot loader, it just works. Do feel free to try it - if that works for you but the distro supplied 4.5.x kernel doesn't, it seems reasonably conclusive that it is the CentOS kernel that is broken for this board. I'd also be interested in learning whether you have any luck getting PCIe cards to work with it without problems - I haven't tried it since upgrading to 4.9.x, but certainly on 4.4.x mainline the machine used to reliably lock up as soon as the driver for the PCIe card loads. Gordan On Fri, Sep 22, 2017 at 12:06 PM, Jeremiah Rothschild <jeremiah(a)franz.com> wrote: > On Fri, Sep 22, 2017 at 11:59:00AM +0100, Gordan Bobic wrote: > > On Fri, Sep 22, 2017 at 11:54 AM, Jeremiah Rothschild < > jeremiah(a)franz.com> > > wrote: > > > > > On Fri, Sep 22, 2017 at 11:39:19AM +0100, Gordan Bobic wrote: > > > > If you are interested, I'm more than happy to share my src.rpm for > 4.9.x, > > > > but won't be able to get to it before tomorrow morning as the > machine was > > > > recently mothballed. > > > > > > Thanks. I actually need to test with as new of a version as I can > because I > > > have been experiencing an occasional "page allocation failure" kernel > > > panic. > > > No idea if/when that was fixed but I figure the newest version is my > best > > > hope. > > > > > > > I've been on my own 4.9.x more or less since I got the machine, it was in > > 24/7 use, and I never experienced that issue. So it may be worth a > > cross-check with the kernel that I'm running to see whether the fault > > follows your machine or whether it is kernel dependent. > > You're right. It would be a good extra data point. Feel free to mail me > directly once you're sorted and I'll gladly check out your 4.9 build. > Thanks > again! > > > > > _______________________________________________ > > Arm-dev mailing list > > Arm-dev(a)centos.org > > https://lists.centos.org/mailman/listinfo/arm-dev > > _______________________________________________ > Arm-dev mailing list > Arm-dev(a)centos.org > https://lists.centos.org/mailman/listinfo/arm-dev >

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Just getting started, Looking for pointers.
by Daniel Baker 27 Nov '17

27 Nov '17

Howdy Y'all, Where would be a few good places to start with the Pine64? My Wife bought it for me with the initial crowd-funding and I am just now getting to playing with it. Any good Centos / Ubuntu images? -- Peace and God Bless, - Dan. ######################## DevOps on a Starship: vim /cookbooks/hyperdrive/attributes/alignments.conf git add . commit -m 'Automation is the new Magick.' git push knife cookbook upload hyperdrive

2 1

[Question] CentOS7.4 for ARM update plan
by Zhou Wang 27 Nov '17

27 Nov '17

Hi, I am afraid in the right place to ask this question. Redhat7.4 for ARM64 already released: https://access.redhat.com/articles/3158541 Before this, CentOS7.4 for ARM64 released: https://wiki.centos.org/SpecialInterestGroup/AltArch/AArch64 As CentOS7.4 just took one internal version of Redhat7.4 as its release version, we should at least backport patches after above Redhat7.4 internal version to CentOS7.4. My question is that is there a plan to backport these patches to CentOS7.4? Or where can I find such plan/schedule? Thanks a lot for any help, Zhou

4 7

Introducing 2017’s extensions to the Arm Architecture
by Jeffrey Walton 27 Nov '17

27 Nov '17

In case it did not make your radar: https://community.arm.com/processors/b/blog/posts/introducing-2017s-extensi… It looks like ARMv8.4 will also provide hardware support for China's SM3 (hash) and SM4 (block cipher), like they support SHA and AES. Jeff

1 0

fake-hwclock
by Kristján Valur Jónsson 21 Nov '17

21 Nov '17

Hi there. I'm running CentOS7 on an RPi3 without hardware clock. I found no suitable "fake-hwclock" (as avilable for raspbian) on the internet, so I implemented my own systemd unit for that. Check out https://github.com/kristjanvalur/fake-hwclock if you're interested. Cheers! -- Kv, Kristján Valur Jónsson, RVX

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Arm-dev November 2017