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Re: [Qemu-devel] Suggested Wiki Update
From: |
Cornelia Huck |
Subject: |
Re: [Qemu-devel] Suggested Wiki Update |
Date: |
Tue, 12 Sep 2017 13:18:23 +0200 |
On Tue, 12 Sep 2017 10:57:14 +0200
Viktor Mihajlovski <address@hidden> wrote:
> Hi,
>
> the content of https://wiki.qemu.org/index.php/Features/S390xNetworkBoot
> is slightly outdated since proper DHCP based netboot support for s390x
> has been implemented by the series ending with commit 29d1221.
>
> As it is still desirable to provide some instructions on building
> network bootable images for the s390x architecture, I'd like to suggest
> that the text is replaced (see proposal below). Conny, could I once more
> request your help in that matter?
>
> == Building a s390 network bootable binary ==
>
> Since 2.10 QEMU offers network boot support which allows to load a
> binary from a TFTP server and boot it. As s390 network bootable images
> are not very common, this document gives a brief overview on how to
> build one.
>
> A s390 network bootable image can be built by bundling some shell
> scripts, busybox and the kexec binary bundled into an initial ramdisk
> and append that to a kernel image. An existing s390 system can be used
> as source.
>
> One way to do that is to take a kernel and an installer initial ramdisk
> from a distribution's DVD/ISO and concatenate them. Some fixups are
> necessary int the new binary, which can be done by using the script in
> [https://github.com/ibm-s390-tools/s390-tools/blob/master/netboot/mk-s390image].
> Booting this image would then start the installation process as if
> booted from the DVD.
>
> Another possible way is to build a binary that behaves similar to the
> PXELINUX boot loader. In this case an initial ramdisk with an init
> process triggering the PXELINUX-like processing has to be built as
> described in
> [https://github.com/ibm-s390-tools/s390-tools/tree/master/netboot]. The
> site also contains a script assisting in the creation of such an initial
> ramdisk.
>
Looks good.
Can you perhaps add a sentence that the base support is available with
2.9 and netboot with 2.10? ('Overview' looks like a good place for
that.)