[Qemu-devel] [PATCH 00/17] s390x emulation support

[Alexander Graf]

We've had support for running s390x guests with KVM for a
while now. This patch set also enables support for running
s390x guests in system as well as linux-user mode in emulation!

Within this scope, I again want to stress that this is _not_
supposed to replace Hercules - the s390 emulator - in any way.
The only target supported by qemu is Linux. You can only run
Linux applications with linux-user emulation and Linux guest OSs
with the system emulation. All the device logic (and 24 bit mode)
for running legacy stuff is missing. Use Hercules for those!

I have successfully run the following guest OSs:

  - SUSE Linux Enterprise Server 11 SP1
  - Debian Lenny

Both of which work just fine on x86_64 and ppc hosts. Other hosts
should also work. The only thing that did not work for me is network.
Somehow networking only works with KVM enabled, so there is probably
some bug involved still.

Either way - rejoice! As with this patch set you can finally fulfill
your mainframe desires on your local workstation. And - most importantly -
finally test patches to virtio against s390!

For images, I'm hoping for Aurelien to provide Debian images that run
in qemu. Other distributions only provide S390x target support in their
enterprise variants, keeping me from redistributing images :(.

If you're trying to get things rolling yourself, make sure to use a
recent kernel that has support for the virtio architecture and virtio
console support - otherwise you won't see output.

The linux user mode emulation part only support 64bit binaries, so
running Debian binaries with that one is out of question for now. Use
the system emulation mode if you really need to run Debian binaries.


Alexander Graf (12):
  Only build ivshmem when CONFIG_PCI && CONFIG_KVM
  virtio: use generic name when possible
  s390x: Enable s390x-softmmu target
  s390x: Dispatch interrupts to KVM or the real CPU
  s390x: Adjust GDB stub
  s390x: virtio machine storage keys
  s390x: Prepare cpu.h for emulation
  s390x: helper functions for system emulation
  s390x: Implement opcode helpers
  s390x: Adjust internal kvm code
  s390x: translate engine for s390x CPU
  s390x: build s390x by default

Ulrich Hecht (5):
  s390x: Enable disassembler for s390x
  s390x: Enable nptl for s390x
  s390x: enable CPU_QuadU
  s390x: s390x-linux-user support
  linux-user: define a couple of syscalls for non-uid16 targets

 Makefile.target                      |    8 +-
 blockdev.c                           |    2 +-
 configure                            |    3 +
 cpu-all.h                            |    2 +-
 cpu-exec.c                           |    8 +
 default-configs/s390x-linux-user.mak |    1 +
 disas.c                              |    6 +
 gdbstub.c                            |    8 +-
 hw/s390-virtio-bus.c                 |   12 +-
 hw/s390-virtio.c                     |   21 +-
 hw/virtio-pci.c                      |    3 +
 linux-user/elfload.c                 |   18 +
 linux-user/main.c                    |   89 +
 linux-user/s390x/syscall.h           |   25 +
 linux-user/s390x/syscall_nr.h        |  349 +++
 linux-user/s390x/target_signal.h     |   26 +
 linux-user/s390x/termbits.h          |  283 ++
 linux-user/signal.c                  |  314 +++
 linux-user/syscall.c                 |  143 +-
 linux-user/syscall_defs.h            |   56 +-
 s390x.ld                             |  194 ++
 scripts/qemu-binfmt-conf.sh          |    4 +-
 target-s390x/cpu.h                   |  759 +++++-
 target-s390x/exec.h                  |   20 +
 target-s390x/helper.c                |  581 ++++-
 target-s390x/helpers.h               |  151 +
 target-s390x/kvm.c                   |   60 +-
 target-s390x/op_helper.c             | 2891 +++++++++++++++++++-
 target-s390x/translate.c             | 5161 +++++++++++++++++++++++++++++++++-
 vl.c                                 |    6 +-
 30 files changed, 11063 insertions(+), 141 deletions(-)
 create mode 100644 default-configs/s390x-linux-user.mak
 create mode 100644 linux-user/s390x/syscall.h
 create mode 100644 linux-user/s390x/syscall_nr.h
 create mode 100644 linux-user/s390x/target_signal.h
 create mode 100644 linux-user/s390x/termbits.h
 create mode 100644 s390x.ld
 create mode 100644 target-s390x/helpers.h