[Arm-dev] Community kernel 4.18.x

[Mark Verlinde]

-----Oorspronkelijk bericht-----
> Afzender:arm_ml at rirasoft.de <arm_ml at rirasoft.de>
> Verstuurd: Dinsdag 23 Oktober 2018 9:39
> Aan: arm-dev at centos.org
> Onderwerp: Re: [Arm-dev] Community kernel 4.18.x
> 
> Am 2018-10-22 19:01, schrieb Mark Verlinde:
> > -----Oorspronkelijk bericht-----
> >> Afzender:Mark Verlinde <mark at havak.nl>
> >> Verstuurd: Maandag 22 Oktober 2018 14:27
> >> Aan: Conversations around CentOS on ARM hardware <arm-dev at centos.org>
> >> Onderwerp: Re: [Arm-dev] Community kernel 4.18.x
> > 
> >> 
> >> Thank you for the hints, it Led to a booting setup!
> >> 
> >> Still need to fine tine, some customization may not be needed 
> >> howerever this configuration led to the booting odroid HC1.
> >> 
> >> Appended cpuidle.off=1 console=tty1 console=ttySAC2,115200n8 to the 
> >> cmdline:
> >> 
> >> # cat /boot/extlinux/extlinux.conf
> >> # extlinux.conf generated by appliance-creator
> >> ui menu.c32
> >> menu autoboot Welcome to Centos-Uboot-Community-kernel. Automatic boot 
> >> in # second{,s}. Press a key for options.
> >> menu title Centos-Uboot-Community-kernel Boot Options.
> >> menu hidden
> >> timeout 20
> >> totaltimeout 600
> >> 
> >> default=Centos-Uboot-Community-kernel (4.18.14-200.el7.armv7hl)
> >> label CentOS Linux (4.18.16-200.el7.armv7hl) 7 (AltArch)
> >>         kernel /vmlinuz-4.18.16-200.el7.armv7hl
> >>         append cpuidle.off=1 console=tty1 console=ttySAC2,115200n8 ro 
> >> root=UUID=a306d630-4957-4da0-8dd6-79f943147d61 LANG=en_US.UTF-8
> >>         fdtdir /dtb-4.18.16-200.el7.armv7hl
> >>         initrd /initramfs-4.18.16-200.el7.armv7hl.img
> >> 
> >> label Centos-Uboot-Community-kernel (4.18.14-200.el7.armv7hl)
> >>         kernel /vmlinuz-4.18.14-200.el7.armv7hl
> >>         append cpuidle.off=1 console=tty1 console=ttySAC2,115200n8 ro 
> >> root=UUID=a306d630-4957-4da0-8dd6-79f943147d61
> >>         fdtdir /dtb-4.18.14-200.el7.armv7hl
> >>         initrd /initramfs-4.18.14-200.el7.armv7hl.img
> >> 
> >> In an effort to mimic the FC28 intenramfs added/omitted  some modules 
> >> and
> >> added _all_ exynos and samsung divers loaded by the booting FC28 
> >> setup:
> >> 
> >> #cat /etc/dracut.conf.d/odroid_hc1.conf
> >> add_dracutmodules+="dm"
> >> omit_dracutmodules+="network ifcfg"
> >> add_drivers+="exynosdrm exynos_bus exynos_trng exynos_nocp exynos_rng 
> >> phy_exynos_dp_video phy_exynos_mipi_video dwc3_exynos clk_exynos_audss 
> >> i2c_exynos5 dw_mmc_exynos dw_mmc_pltfm dw_mmc phy_exynos_usb2 
> >> phy_exynos5_usbdrd pwm_samsung "
> >> 
> >> (AGAIN) NOTE: some may be necessary others may be ommited..
> > 
> > Turns out one additional driver - dwc3 - is needed to boot the odroid
> > HC1 with a rootfs residing on a SATA device.
> > My best guess is dwc3_exynos actually depends on dwc3 and/or (one of)
> > the dependencies of dwc3.
> > 
> > 
> > #cat /etc/dracut.conf.d/odroid_hc1.conf
> > add_dracutmodules+="dm"
> > omit_dracutmodules+="network ifcfg"
> > add_drivers+=" exynosdrm exynos_bus exynos_trng exynos_nocp exynos_rng
> > phy_exynos_dp_video phy_exynos_mipi_video dwc3_exynos clk_exynos_audss
> > i2c_exynos5 dw_mmc_exynos dw_mmc_pltfm dw_mmc phy_exynos_usb2
> > phy_exynos5_usbdrd pwm_samsung "
> > add_drivers+=" dwc3"
> > 
> 
> Mark: how do you get CentOS with this actual kernel on the Odroid HC1 ?
>   I've 2 of them running Fedora as a Mailserver and Nextcloudserver.

The kernel are kindly build by Pablo and can be found at:
https://armv7.dev.centos.org/repodir/community-kernel-latest/

On a running armhfp device (distro or kernel should not matter); You may mount the sd-card and chroot in to the card to install / update the kernel.

Mount the rootfs partition (usually part4) of your sd card and the boot partition (usually part2); mount proc and sys of the "host" too (ie):

mount /dev/sdX4 /mnt 
mount /dev/sdX2 /mount/boot
mount --bind /proc /mnt/proc
mount --bind /sys /mnt/sys

then chroot /mnt

You may need to copy the /etc/resolve.conf from your host system to kickstart networking.


_OT_
For personal use and on request from others I made a flash-able img file with 4.18.16 installed.
It is a bit different from the default userland-generic though: 2 partitions starting @4096  (1) boot (2) rootfs;  compressed swap-space in ram.
NOTE: this link may be short lived as the setup is experimental https://drive.google.com/open?id=1PvLxWVwvK9H2zJTnBF2rKlA7IDmbpa7s
and my rough notes on the HC1: https://gist.github.com/markVnl/7adf25cebfdce5d5009d93b7b4caae96
_OT_

Greetings Mark
> 
> Greetings
> Andreas
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