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[Qemu-devel] [RFC PATCH v2 0/8] Implement network booting directly into
From: |
Thomas Huth |
Subject: |
[Qemu-devel] [RFC PATCH v2 0/8] Implement network booting directly into the s390-ccw BIOS |
Date: |
Fri, 7 Jul 2017 12:26:56 +0200 |
It's already possible to do a network boot of an s390x guest with an
external netboot image based on a Linux installation, but it would
be much more convenient if the s390-ccw firmware supported network
booting right out of the box, without the need to assemble such an
external image first.
This patch series now introduces a s390-netboot.img that can be used
for network booting via DHCP and TFTP by re-using the networking stack
from the SLOF firmware (see https://github.com/aik/SLOF/ for details),
and adds a driver for virtio-net-ccw devices.
The code can only be built if the roms/SLOF/ submodule has been checked
out, and you apply the following pending SLOF patch on top of it:
https://patchwork.ozlabs.org/patch/785384/
Then it should be possible to download a combined kernel + initrd
image via TFTP, e.g. by starting QEMU with:
qemu-system-s390x ... -device virtio-net,netdev=n1,bootindex=1 \
-netdev user,id=n1,tftp=/path/to/tftp,bootfile=kernel.img
Note that this version does not support downloading via config
files (i.e. pxelinux config files or .INS config files) yet. This
will be added later.
v2:
- Put the network boot loader into a separate s390-netboot.img
binary instead of linking it directly into the s390-ccw firmware.
- Use the SLOF sources from the roms/SLOF/ submodule instead of
copying them into the pc-bios/s390-ccw folder
- Removed the .INS config file loading code for now - only support
combined kernel + initrd images in this initial implementation.
Thomas Huth (8):
pc-bios/s390-ccw: Move libc functions to separate header
pc-bios/s390-ccw: Move ebc2asc to sclp.c
pc-bios/s390-ccw: Move virtio-block related functions into a separate
file
pc-bios/s390-ccw: Add a write() function for stdio
roms/SLOF: Update submodule to latest status
pc-bios/s390-ccw: Add core files for the network bootloading program
pc-bios/s390-ccw: Add virtio-net driver code
pc-bios/s390-ccw: Link libnet into the netboot image and do the TFTP
load
pc-bios/s390-ccw/Makefile | 13 +-
pc-bios/s390-ccw/bootmap.c | 1 +
pc-bios/s390-ccw/libc.h | 43 +++++
pc-bios/s390-ccw/main.c | 14 +-
pc-bios/s390-ccw/netboot.mak | 51 ++++++
pc-bios/s390-ccw/netmain.c | 365 +++++++++++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/s390-ccw.h | 31 +---
pc-bios/s390-ccw/sclp.c | 37 +++--
pc-bios/s390-ccw/virtio-blk.c | 296 +++++++++++++++++++++++++++++++++
pc-bios/s390-ccw/virtio-net.c | 130 +++++++++++++++
pc-bios/s390-ccw/virtio-scsi.c | 1 +
pc-bios/s390-ccw/virtio.c | 283 ++------------------------------
pc-bios/s390-ccw/virtio.h | 17 +-
roms/SLOF | 2 +-
14 files changed, 955 insertions(+), 329 deletions(-)
create mode 100644 pc-bios/s390-ccw/libc.h
create mode 100644 pc-bios/s390-ccw/netboot.mak
create mode 100644 pc-bios/s390-ccw/netmain.c
create mode 100644 pc-bios/s390-ccw/virtio-blk.c
create mode 100644 pc-bios/s390-ccw/virtio-net.c
--
1.8.3.1