[PATCH v2 0/9] tcg: support 32-bit guest addresses as signed

[Richard Henderson]

We have 3 hosts that naturally produce sign-extended values,
and have to work extra hard (with 1 or 2 insns) to produce
the zero-extended address that we expect today.

However, it's a simple matter of arithmetic for the middle-end
to require sign-extended addresses instead.  For user-only, we
do have to be careful not to allow a guest object to wrap around
the signed boundary, but that's fairly easily done.

Tested with aarch64, as that's the best hw currently available.

Patches lacking review:
  03-accel-tcg-Support-TCG_TARGET_SIGNED_ADDR32-for-so.patch
  06-tcg-aarch64-Support-TCG_TARGET_SIGNED_ADDR32.patch
  07-tcg-mips-Support-TCG_TARGET_SIGNED_ADDR32.patch
  09-tcg-loongarch64-Support-TCG_TARGET_SIGNED_ADDR32.patch (new)


r~

Version 1: 
https://lore.kernel.org/qemu-devel/20211010174401.141339-1-richard.henderson@linaro.org/


Richard Henderson (9):
  tcg: Add TCG_TARGET_SIGNED_ADDR32
  accel/tcg: Split out g2h_tlbe
  accel/tcg: Support TCG_TARGET_SIGNED_ADDR32 for softmmu
  accel/tcg: Add guest_base_signed_addr32 for user-only
  linux-user: Support TCG_TARGET_SIGNED_ADDR32
  tcg/aarch64: Support TCG_TARGET_SIGNED_ADDR32
  tcg/mips: Support TCG_TARGET_SIGNED_ADDR32
  tcg/riscv: Support TCG_TARGET_SIGNED_ADDR32
  tcg/loongarch64: Support TCG_TARGET_SIGNED_ADDR32

 include/exec/cpu-all.h            | 20 +++++++--
 include/exec/cpu_ldst.h           |  3 +-
 tcg/aarch64/tcg-target-sa32.h     |  7 ++++
 tcg/arm/tcg-target-sa32.h         |  1 +
 tcg/i386/tcg-target-sa32.h        |  1 +
 tcg/loongarch64/tcg-target-sa32.h |  1 +
 tcg/mips/tcg-target-sa32.h        |  9 ++++
 tcg/ppc/tcg-target-sa32.h         |  1 +
 tcg/riscv/tcg-target-sa32.h       |  5 +++
 tcg/s390x/tcg-target-sa32.h       |  1 +
 tcg/sparc/tcg-target-sa32.h       |  1 +
 tcg/tci/tcg-target-sa32.h         |  1 +
 accel/tcg/cputlb.c                | 36 +++++++++++-----
 bsd-user/main.c                   |  4 ++
 linux-user/elfload.c              | 62 +++++++++++++++++++++------
 linux-user/main.c                 |  3 ++
 tcg/tcg.c                         |  4 ++
 tcg/aarch64/tcg-target.c.inc      | 69 ++++++++++++++++++++-----------
 tcg/loongarch64/tcg-target.c.inc  | 15 +++----
 tcg/mips/tcg-target.c.inc         | 10 +----
 tcg/riscv/tcg-target.c.inc        |  8 +---
 21 files changed, 187 insertions(+), 75 deletions(-)
 create mode 100644 tcg/aarch64/tcg-target-sa32.h
 create mode 100644 tcg/arm/tcg-target-sa32.h
 create mode 100644 tcg/i386/tcg-target-sa32.h
 create mode 100644 tcg/loongarch64/tcg-target-sa32.h
 create mode 100644 tcg/mips/tcg-target-sa32.h
 create mode 100644 tcg/ppc/tcg-target-sa32.h
 create mode 100644 tcg/riscv/tcg-target-sa32.h
 create mode 100644 tcg/s390x/tcg-target-sa32.h
 create mode 100644 tcg/sparc/tcg-target-sa32.h
 create mode 100644 tcg/tci/tcg-target-sa32.h

-- 
2.25.1