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[Qemu-devel] [RFC PATCH 00/14] Implement network booting directly into t


From: Thomas Huth
Subject: [Qemu-devel] [RFC PATCH 00/14] Implement network booting directly into the s390-ccw BIOS
Date: Tue, 27 Jun 2017 13:48:06 +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 network booting via DHCP and TFTP
directly into the s390-ccw firmware 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.

Once the patches have been applied, you can download an .INS file
via TFTP which contains the information about the further files
that have to be loaded - kernel, initrd, etc. For example, you can
use the built-in TFTP and DHCP server of QEMU for this by starting
QEMU with:

 qemu-system-s390x ... -device virtio-net,netdev=n1,bootindex=1 \
       -netdev user,id=n1,tftp=/path/to/tftp,bootfile=generic.ins

The .INS file has to use the same syntax as the .INS files that can
already be found on s390x Linux distribution installation CD-ROMs.

The patches are still in a rough shape, but before I continue here,
I though I'd get some feedback first. Specifically:

- This adds a lot of additional code to the s390-ccw firmware (and
  the binary is afterwards three times as big as before, 75k instead
  of 25k) ... is that still acceptable?

- Is it OK to require loading an .INS file first? Or does anybody
  have a better idea how to load multiple files (kernel, initrd,
  etc. ...)?

- The code from SLOF uses a different coding style (TABs instead
  of space) ... is it OK to keep that coding style here so we
  can share patches between SLOF and s390-ccw more easily?

- The code only supports TFTP (via UDP) ... I think that is OK for
  most use-cases, but if we ever want to support network booting
  via HTTP or something else that is based on TCP, we would need to
  use something else instead... Should we maybe rather head towards
  grub2, petitboot or something different instead?

 Thomas


Thomas Huth (14):
  pc-bios/s390-ccw: Add the libc from the SLOF firmware
  pc-bios/s390-ccw: Start using the libc from SLOF
  pc-bios/s390-ccw: Add a write() function for stdio
  pc-bios/s390-ccw: Add implementation of sbrk()
  pc-bios/s390-ccw: Add the TFTP network loading stack from SLOF
  libnet: Remove remainders of netsave code
  libnet: Rework error message printing
  libnet: Refactor some code of netload() into a separate function
  pc-bios/s390-ccw: Make the basic libnet code compilable
  pc-bios/s390-ccw: Add timer code for the libnet
  pc-bios/s390-ccw: Add virtio-net driver code
  pc-bios/s390-ccw: Load file via an intermediate .INS file
  pc-bios/s390-ccw: Allow loading to address 0
  pc-bios/s390-ccw: Wire up the netload code

 configure                                  |   6 +-
 hw/s390x/ipl.c                             |   2 +-
 pc-bios/s390-ccw/Makefile                  |  14 +-
 pc-bios/s390-ccw/bootmap.c                 |  10 +-
 pc-bios/s390-ccw/bootmap.h                 |   1 +
 pc-bios/s390-ccw/libc/Makefile             |  47 ++
 pc-bios/s390-ccw/libc/README.txt           |  49 ++
 pc-bios/s390-ccw/libc/ctype/Makefile.inc   |  21 +
 pc-bios/s390-ccw/libc/ctype/isdigit.c      |  25 +
 pc-bios/s390-ccw/libc/ctype/isprint.c      |  18 +
 pc-bios/s390-ccw/libc/ctype/isspace.c      |  29 +
 pc-bios/s390-ccw/libc/ctype/isxdigit.c     |  21 +
 pc-bios/s390-ccw/libc/ctype/tolower.c      |  18 +
 pc-bios/s390-ccw/libc/ctype/toupper.c      |  21 +
 pc-bios/s390-ccw/libc/include/ctype.h      |  24 +
 pc-bios/s390-ccw/libc/include/errno.h      |  34 +
 pc-bios/s390-ccw/libc/include/limits.h     |  32 +
 pc-bios/s390-ccw/libc/include/stdarg.h     |  22 +
 pc-bios/s390-ccw/libc/include/stdbool.h    |  20 +
 pc-bios/s390-ccw/libc/include/stddef.h     |  25 +
 pc-bios/s390-ccw/libc/include/stdint.h     |  28 +
 pc-bios/s390-ccw/libc/include/stdio.h      |  63 ++
 pc-bios/s390-ccw/libc/include/stdlib.h     |  34 +
 pc-bios/s390-ccw/libc/include/string.h     |  37 ++
 pc-bios/s390-ccw/libc/include/sys/socket.h |  53 ++
 pc-bios/s390-ccw/libc/include/unistd.h     |  28 +
 pc-bios/s390-ccw/libc/stdio/Makefile.inc   |  24 +
 pc-bios/s390-ccw/libc/stdio/fileno.c       |  19 +
 pc-bios/s390-ccw/libc/stdio/fprintf.c      |  26 +
 pc-bios/s390-ccw/libc/stdio/printf.c       |  27 +
 pc-bios/s390-ccw/libc/stdio/putc.c         |  25 +
 pc-bios/s390-ccw/libc/stdio/putchar.c      |  21 +
 pc-bios/s390-ccw/libc/stdio/puts.c         |  28 +
 pc-bios/s390-ccw/libc/stdio/setvbuf.c      |  28 +
 pc-bios/s390-ccw/libc/stdio/sprintf.c      |  30 +
 pc-bios/s390-ccw/libc/stdio/stdchnls.c     |  23 +
 pc-bios/s390-ccw/libc/stdio/vfprintf.c     |  27 +
 pc-bios/s390-ccw/libc/stdio/vsnprintf.c    | 298 +++++++++
 pc-bios/s390-ccw/libc/stdio/vsprintf.c     |  19 +
 pc-bios/s390-ccw/libc/stdlib/Makefile.inc  |  23 +
 pc-bios/s390-ccw/libc/stdlib/atoi.c        |  18 +
 pc-bios/s390-ccw/libc/stdlib/atol.c        |  18 +
 pc-bios/s390-ccw/libc/stdlib/error.c       |  15 +
 pc-bios/s390-ccw/libc/stdlib/free.c        |  26 +
 pc-bios/s390-ccw/libc/stdlib/malloc.c      | 157 +++++
 pc-bios/s390-ccw/libc/stdlib/malloc_defs.h |  16 +
 pc-bios/s390-ccw/libc/stdlib/memalign.c    |  26 +
 pc-bios/s390-ccw/libc/stdlib/rand.c        |  29 +
 pc-bios/s390-ccw/libc/stdlib/realloc.c     |  40 ++
 pc-bios/s390-ccw/libc/stdlib/strtol.c      | 115 ++++
 pc-bios/s390-ccw/libc/stdlib/strtoul.c     | 105 ++++
 pc-bios/s390-ccw/libc/string/Makefile.inc  |  23 +
 pc-bios/s390-ccw/libc/string/memchr.c      |  29 +
 pc-bios/s390-ccw/libc/string/memcmp.c      |  30 +
 pc-bios/s390-ccw/libc/string/memcpy.c      |  27 +
 pc-bios/s390-ccw/libc/string/memmove.c     |  42 ++
 pc-bios/s390-ccw/libc/string/memset.c      |  25 +
 pc-bios/s390-ccw/libc/string/strcasecmp.c  |  28 +
 pc-bios/s390-ccw/libc/string/strcat.c      |  24 +
 pc-bios/s390-ccw/libc/string/strchr.c      |  28 +
 pc-bios/s390-ccw/libc/string/strcmp.c      |  28 +
 pc-bios/s390-ccw/libc/string/strcpy.c      |  25 +
 pc-bios/s390-ccw/libc/string/strlen.c      |  27 +
 pc-bios/s390-ccw/libc/string/strncasecmp.c |  32 +
 pc-bios/s390-ccw/libc/string/strncmp.c     |  31 +
 pc-bios/s390-ccw/libc/string/strncpy.c     |  33 +
 pc-bios/s390-ccw/libc/string/strstr.c      |  37 ++
 pc-bios/s390-ccw/libc/string/strtok.c      |  45 ++
 pc-bios/s390-ccw/libnet/Makefile           |  42 ++
 pc-bios/s390-ccw/libnet/args.c             | 179 ++++++
 pc-bios/s390-ccw/libnet/args.h             |  23 +
 pc-bios/s390-ccw/libnet/dhcp.c             | 955 +++++++++++++++++++++++++++++
 pc-bios/s390-ccw/libnet/dhcp.h             |  49 ++
 pc-bios/s390-ccw/libnet/dhcpv6.c           | 212 +++++++
 pc-bios/s390-ccw/libnet/dhcpv6.h           | 154 +++++
 pc-bios/s390-ccw/libnet/dns.c              | 526 ++++++++++++++++
 pc-bios/s390-ccw/libnet/dns.h              |  28 +
 pc-bios/s390-ccw/libnet/ethernet.c         | 189 ++++++
 pc-bios/s390-ccw/libnet/ethernet.h         |  47 ++
 pc-bios/s390-ccw/libnet/icmpv6.c           | 409 ++++++++++++
 pc-bios/s390-ccw/libnet/icmpv6.h           | 135 ++++
 pc-bios/s390-ccw/libnet/ipv4.c             | 898 +++++++++++++++++++++++++++
 pc-bios/s390-ccw/libnet/ipv4.h             |  97 +++
 pc-bios/s390-ccw/libnet/ipv6.c             | 774 +++++++++++++++++++++++
 pc-bios/s390-ccw/libnet/ipv6.h             | 188 ++++++
 pc-bios/s390-ccw/libnet/ndp.c              | 184 ++++++
 pc-bios/s390-ccw/libnet/ndp.h              |  72 +++
 pc-bios/s390-ccw/libnet/netapps.h          |  25 +
 pc-bios/s390-ccw/libnet/netload.c          | 600 ++++++++++++++++++
 pc-bios/s390-ccw/libnet/tcp.c              |  46 ++
 pc-bios/s390-ccw/libnet/tcp.h              |  27 +
 pc-bios/s390-ccw/libnet/tftp.c             | 595 ++++++++++++++++++
 pc-bios/s390-ccw/libnet/tftp.h             |  50 ++
 pc-bios/s390-ccw/libnet/time.h             |   6 +
 pc-bios/s390-ccw/libnet/timer.c            |  40 ++
 pc-bios/s390-ccw/libnet/udp.c              | 115 ++++
 pc-bios/s390-ccw/libnet/udp.h              |  53 ++
 pc-bios/s390-ccw/main.c                    |   3 +-
 pc-bios/s390-ccw/s390-ccw.h                |  30 +-
 pc-bios/s390-ccw/sbrk.c                    |  39 ++
 pc-bios/s390-ccw/sclp.c                    |  32 +-
 pc-bios/s390-ccw/virtio-net.c              | 125 ++++
 pc-bios/s390-ccw/virtio.c                  |  16 +-
 pc-bios/s390-ccw/virtio.h                  |  11 +
 104 files changed, 9296 insertions(+), 57 deletions(-)
 create mode 100644 pc-bios/s390-ccw/libc/Makefile
 create mode 100644 pc-bios/s390-ccw/libc/README.txt
 create mode 100644 pc-bios/s390-ccw/libc/ctype/Makefile.inc
 create mode 100644 pc-bios/s390-ccw/libc/ctype/isdigit.c
 create mode 100644 pc-bios/s390-ccw/libc/ctype/isprint.c
 create mode 100644 pc-bios/s390-ccw/libc/ctype/isspace.c
 create mode 100644 pc-bios/s390-ccw/libc/ctype/isxdigit.c
 create mode 100644 pc-bios/s390-ccw/libc/ctype/tolower.c
 create mode 100644 pc-bios/s390-ccw/libc/ctype/toupper.c
 create mode 100644 pc-bios/s390-ccw/libc/include/ctype.h
 create mode 100644 pc-bios/s390-ccw/libc/include/errno.h
 create mode 100644 pc-bios/s390-ccw/libc/include/limits.h
 create mode 100644 pc-bios/s390-ccw/libc/include/stdarg.h
 create mode 100644 pc-bios/s390-ccw/libc/include/stdbool.h
 create mode 100644 pc-bios/s390-ccw/libc/include/stddef.h
 create mode 100644 pc-bios/s390-ccw/libc/include/stdint.h
 create mode 100644 pc-bios/s390-ccw/libc/include/stdio.h
 create mode 100644 pc-bios/s390-ccw/libc/include/stdlib.h
 create mode 100644 pc-bios/s390-ccw/libc/include/string.h
 create mode 100644 pc-bios/s390-ccw/libc/include/sys/socket.h
 create mode 100644 pc-bios/s390-ccw/libc/include/unistd.h
 create mode 100644 pc-bios/s390-ccw/libc/stdio/Makefile.inc
 create mode 100644 pc-bios/s390-ccw/libc/stdio/fileno.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/fprintf.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/printf.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/putc.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/putchar.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/puts.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/setvbuf.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/sprintf.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/stdchnls.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/vfprintf.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/vsnprintf.c
 create mode 100644 pc-bios/s390-ccw/libc/stdio/vsprintf.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/Makefile.inc
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/atoi.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/atol.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/error.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/free.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/malloc.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/malloc_defs.h
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/memalign.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/rand.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/realloc.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/strtol.c
 create mode 100644 pc-bios/s390-ccw/libc/stdlib/strtoul.c
 create mode 100644 pc-bios/s390-ccw/libc/string/Makefile.inc
 create mode 100644 pc-bios/s390-ccw/libc/string/memchr.c
 create mode 100644 pc-bios/s390-ccw/libc/string/memcmp.c
 create mode 100644 pc-bios/s390-ccw/libc/string/memcpy.c
 create mode 100644 pc-bios/s390-ccw/libc/string/memmove.c
 create mode 100644 pc-bios/s390-ccw/libc/string/memset.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strcasecmp.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strcat.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strchr.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strcmp.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strcpy.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strlen.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strncasecmp.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strncmp.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strncpy.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strstr.c
 create mode 100644 pc-bios/s390-ccw/libc/string/strtok.c
 create mode 100644 pc-bios/s390-ccw/libnet/Makefile
 create mode 100644 pc-bios/s390-ccw/libnet/args.c
 create mode 100644 pc-bios/s390-ccw/libnet/args.h
 create mode 100644 pc-bios/s390-ccw/libnet/dhcp.c
 create mode 100644 pc-bios/s390-ccw/libnet/dhcp.h
 create mode 100644 pc-bios/s390-ccw/libnet/dhcpv6.c
 create mode 100644 pc-bios/s390-ccw/libnet/dhcpv6.h
 create mode 100644 pc-bios/s390-ccw/libnet/dns.c
 create mode 100644 pc-bios/s390-ccw/libnet/dns.h
 create mode 100644 pc-bios/s390-ccw/libnet/ethernet.c
 create mode 100644 pc-bios/s390-ccw/libnet/ethernet.h
 create mode 100644 pc-bios/s390-ccw/libnet/icmpv6.c
 create mode 100644 pc-bios/s390-ccw/libnet/icmpv6.h
 create mode 100644 pc-bios/s390-ccw/libnet/ipv4.c
 create mode 100644 pc-bios/s390-ccw/libnet/ipv4.h
 create mode 100644 pc-bios/s390-ccw/libnet/ipv6.c
 create mode 100644 pc-bios/s390-ccw/libnet/ipv6.h
 create mode 100644 pc-bios/s390-ccw/libnet/ndp.c
 create mode 100644 pc-bios/s390-ccw/libnet/ndp.h
 create mode 100644 pc-bios/s390-ccw/libnet/netapps.h
 create mode 100644 pc-bios/s390-ccw/libnet/netload.c
 create mode 100644 pc-bios/s390-ccw/libnet/tcp.c
 create mode 100644 pc-bios/s390-ccw/libnet/tcp.h
 create mode 100644 pc-bios/s390-ccw/libnet/tftp.c
 create mode 100644 pc-bios/s390-ccw/libnet/tftp.h
 create mode 100644 pc-bios/s390-ccw/libnet/time.h
 create mode 100644 pc-bios/s390-ccw/libnet/timer.c
 create mode 100644 pc-bios/s390-ccw/libnet/udp.c
 create mode 100644 pc-bios/s390-ccw/libnet/udp.h
 create mode 100644 pc-bios/s390-ccw/sbrk.c
 create mode 100644 pc-bios/s390-ccw/virtio-net.c

-- 
1.8.3.1




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