[Qemu-devel] [PATCH 00/62] s390x tcg target

[Richard Henderson]

The following patch series is available at

  git://repo.or.cz/qemu/rth.git tcg-s390-2

It begins with Uli Hecht's original patch, posted by Alexander
sometime last year.  I then make incremental changes to

  (1) Make it compile -- first patch that compiles is tagged
      as tcg-s390-2-first-compile and is

      d142103... tcg-s390: Define tcg_target_reg_names.

  (2) Make it work -- the first patch that i386-linux-user 
      successfully completes linux-test-user-0.2 is tagged
      as tcg-s390-2-first-working and is

      3571f8d... tcg-s390: Implement setcond.

  (3) Make it work for other targets.  I don't tag this,
      but there are lots of load/store aborts and an 
      incorrectly division routine until

      9798371... tcg-s390: Implement div2.

  (4) Make it work well.  The balance of the patches incrementally
      add support for new instructions.  At

      7bfaa9e... tcg-s390: Query instruction extensions that are installed.

      I add support for detecting the instruction set extensions
      present in the host and then start disabling some of those
      new instructions that may not be present.

Once things start working, each step was tested with an --enable-debug
compile, and running the linux-user-test suite as well as booting 
the {arm,coldfire,sparc}-linux test kernels, and booting freedos.

Unfortunately, each step was only built without optimization, and it
is only at the end that we discovered that TCG was not properly honoring
the host ABI.  This is solved by the last patch, adding proper sign
extensions for the 32-bit function arguments.  With the final patch
everything works for an optimized build as well.

The current state is that the TCG compiler works for an s390x host.
That is, with a 64-bit userland binary.  It will *compile* for a 
32-bit userland binary, but that facility is only retained for the
purpose of running the s390 kvm guest.  If kvm is not used, the
32-bit binary will exit with an error message.

Given that this is the beginning of proper support for s390, I don't
know whether bisectability is really an issue.  I suppose we could
fairly easily re-base the patches that touch files outside tcg/s390/
and then squash the rest, but I suspect the history may be useful.



r~



Alexander Graf (2):
  S390 TCG target
  add lost chunks from the original patch

Richard Henderson (60):
  tcg-s390: Only validate CPUTLBEntry for system mode.
  tcg-s390: Fix tcg_prepare_qemu_ldst for user mode.
  tcg-s390: Move opcode defines to tcg-target.c.
  s390x: Avoid _llseek.
  s390x: Don't use a linker script for user-only.
  tcg-s390: Avoid set-but-not-used werrors.
  tcg-s390: Mark R0 & R15 reserved.
  tcg-s390: R6 is a function argument register
  tcg-s390: Move tcg_out_mov up and use it throughout.
  tcg-s390: Eliminate the S constraint.
  tcg-s390: Add -m64 and -march to s390x compilation.
  tcg-s390: Define tcg_target_reg_names.
  tcg-s390: Update disassembler from binutils head.
  tcg-s390: Compute is_write in cpu_signal_handler.
  tcg-s390: Reorganize instruction emission
  tcg-s390: Use matching constraints.
  tcg-s390: Fixup qemu_ld/st opcodes.
  tcg-s390: Implement setcond.
  tcg-s390: Generalize the direct load/store emission.
  tcg-s390: Tidy branches.
  tcg-s390: Add tgen_calli.
  tcg-s390: Implement div2.
  tcg-s390: Re-implement tcg_out_movi.
  tcg-s390: Implement sign and zero-extension operations.
  tcg-s390: Implement bswap operations.
  tcg-s390: Implement rotates.
  tcg-s390: Use LOAD COMPLIMENT for negate.
  tcg-s390: Tidy unimplemented opcodes.
  tcg-s390: Use the extended-immediate facility for add/sub.
  tcg-s390: Implement immediate ANDs.
  tcg-s390: Implement immediate ORs.
  tcg-s390: Implement immediate MULs.
  tcg-s390: Implement immediate XORs.
  tcg-s390: Icache flush is a no-op.
  tcg-s390: Define TCG_TMP0.
  tcg-s390: Tidy regset initialization; use R14 as temporary.
  tcg-s390: Rearrange register allocation order.
  tcg-s390: Tidy goto_tb.
  tcg-s390: Allocate the code_gen_buffer near the main program.
  tcg-s390: Rearrange qemu_ld/st to avoid register copy.
  tcg-s390: Tidy tcg_prepare_qemu_ldst.
  tcg-s390: Tidy user qemu_ld/st.
  tcg-s390: Implement GUEST_BASE.
  tcg-s390: Query instruction extensions that are installed.
  tcg-s390: Conditionalize general-instruction-extension insns.
  tcg-s390: Conditionalize ADD IMMEDIATE instructions.
  tcg-s390: Conditionalize LOAD IMMEDIATE instructions.
  tcg-s390: Conditionalize 8 and 16 bit extensions.
  tcg-s390: Conditionalize AND IMMEDIATE instructions.
  tcg-s390: Conditionalize OR IMMEDIATE instructions.
  tcg-s390: Conditionalize XOR IMMEDIATE instructions.
  tcg-s390: Do not require the extended-immediate facility.
  tcg-s390: Use 16-bit branches for forward jumps.
  tcg-s390: Use the LOAD AND TEST instruction for compares.
  tcg-s390: Use the COMPARE IMMEDIATE instrucions for compares.
  tcg-s390: Use COMPARE AND BRANCH instructions.
  tcg-s390: Generalize load/store support.
  tcg-s390: Fix TLB comparison width.
  tcg-s390: Enable compile in 32-bit mode.
  tcg: Optionally sign-extend 32-bit arguments for 64-bit host.

 configure                    |   12 +-
 cpu-exec.c                   |   42 +-
 def-helper.h                 |   38 +-
 exec.c                       |    7 +
 linux-user/syscall.c         |    4 +-
 s390-dis.c                   |  818 +++++++++++++---
 target-i386/ops_sse_header.h |    3 +
 target-ppc/helper.h          |    1 +
 tcg/s390/tcg-target.c        | 2240 +++++++++++++++++++++++++++++++++++++++++-
 tcg/s390/tcg-target.h        |   63 +-
 tcg/tcg-op.h                 |   34 +-
 tcg/tcg.c                    |   41 +-
 12 files changed, 3063 insertions(+), 240 deletions(-)