[yocto] Stuck to build zImage-initramfs

[Zoran Stojsavljevic]

Jupiter,

I never read carefully the whole mechanism how to bundle kernel with
initramfs in YOCTO.

I have there a description how to organize kernel image WITHOUT
initramfs (only kernel image by itself) and separately initramfs as
final stage, so I can do the tests with Lava, but I developed another
meanings with such a configuration: some another way of testing
various proofs of concepts.

What you are asking is a classical approach: kernel bundled with
initramfs, which is called Dracut phase, before mounting HDD/SSD
permanent rootfs... It is non-trivial process, controlled by various
kernel scripts.

I also need to analyse this @ thread regarding what you have asked
for... Maybe this is good time do to such a analysis! If?

Zoran
_______

On Tue, Jul 9, 2019 at 1:47 PM JH <jupiter.hce at gmail.com> wrote:
>
> Thanks Zoran, I did see that link and your post to run mkimage. Did
> you get zImage-initramfs? I have to admit, I lost in that long email
> discussion with different approaches, I tried all set up, but there is
> no zImage-initramfs to be generated, files built in deploy/images just
> could not be used to run uuu on imx6 RAM.
>
> There is post for add KERNEL_INITRAMFS = "-initramfs", it looks like
> very close to generate zImage-initramfs, but I could still not get it
> :-(.
>
> Thank you very much.
>
> On 7/9/19, Zoran Stojsavljevic <zoran.stojsavljevic at gmail.com> wrote:
> > Please, read the following thread:
> > https://lists.yoctoproject.org/pipermail/yocto/2018-July/041680.html
> >
> > Zoran
> > _______
> >
> > On Mon, Jul 8, 2019 at 11:43 PM JH <jupiter.hce at gmail.com> wrote:
> >>
> >> Hi,
> >>
> >> I have been stuck to build zImage-initramfs for weeks. I've read Yocto
> >> latest document, but still failed to generate the initarmfs to run on
> >> RAM. I added following statements in local.conf:
> >>
> >> UBOOT_CONFIG = "ram"
> >> INITRAMFS_IMAGE_BUNDLE = "1"
> >> DISTRO_FEATURES_append = " ram"
> >> IMAGE_FSTYPES_append = " cpio.xz"
> >>
> >> It built to following images:
> >>
> >> dev-image.rootfs.cpio.xz
> >> u-boot.imx-ram
> >> zImage.bin
> >>
> >> If I extract the dev-image.rootfs.cpio.xz, it contains zImage at boot
> >> directory.
> >>
> >> What I need is the zImage-initramfs to contain the rootfs in initramfs
> >> format.
> >>
> >> I see there is document ramfs-rootfs-initramfs.txt, but it did not
> >> mention how to generate zImage-initramfs.
> >>
> >> There is core-image-minimal-initramfs.bb, but it cannot be run:
> >>
> >> $ MACHINE="imx6evk" DISTRO="imx6evk" bitbake core-image-minimal-initramfs
> >> ERROR: Nothing PROVIDES 'core-image-minimal-initramfs'
> >> core-image-minimal-initramfs was skipped: incompatible with host
> >> arm-oe-linux-gnueabi (not in COMPATIBLE_HOST)
> >>
> >> Could any one help what I am missing here and how to build the
> >> zImage-initramfs?
> >>
> >> Thank you.
> >>
> >> Kind regards,
> >>
> >> - jh
> >> --
> >> _______________________________________________
> >> yocto mailing list
> >> yocto at yoctoproject.org
> >> https://lists.yoctoproject.org/listinfo/yocto
> >