[PATCH v9 0/4] gdbstub and TCG plugin improvements

[Akihiko Odaki <akihiko.odaki@daynix.com>]

This series extracts fixes and refactorings that can be applied
independently from "[PATCH v9 00/23] plugins: Allow to read registers".

The patch "target/riscv: Move MISA limits to class" was replaced with
patch "target/riscv: Move misa_mxl_max to class" since I found instances
may have different misa_ext_mask.

V6 -> V7:
  Rebased.

V5 -> V6:
  Added patch "default-configs: Add TARGET_XML_FILES definition".
  Rebased.

V4 -> V5:
  Added patch "hw/riscv: Use misa_mxl instead of misa_mxl_max".

V3 -> V4:
  Added patch "gdbstub: Check if gdb_regs is NULL".

V2 -> V3:
  Restored patch sets from the previous version.
  Rebased to commit 800485762e6564e04e2ab315132d477069562d91.

V1 -> V2:
  Added patch "target/riscv: Do not allow MXL_RV32 for TARGET_RISCV64".
  Added patch "target/riscv: Initialize gdb_core_xml_file only once".
  Dropped patch "target/riscv: Remove misa_mxl validation".
  Dropped patch "target/riscv: Move misa_mxl_max to class".
  Dropped patch "target/riscv: Validate misa_mxl_max only once".

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
Changes in v9:
- Rebased to commit 977542ded7e6b28d2bc077bcda24568c716e393c.
- Link to v8: https://lore.kernel.org/r/20231218-riscv-v8-0-c9bf2b1582d7@daynix.com

Changes in v8:
- Added a more detailed explanation for patch "hw/riscv: Use misa_mxl
  instead of misa_mxl_max". (Alistair Francis)
- Link to v7: https://lore.kernel.org/r/20231213-riscv-v7-0-a760156a337f@daynix.com

---
Akihiko Odaki (4):
      hw/riscv: Use misa_mxl instead of misa_mxl_max
      target/riscv: Remove misa_mxl validation
      target/riscv: Move misa_mxl_max to class
      target/riscv: Validate misa_mxl_max only once

 target/riscv/cpu.h         |   4 +-
 hw/riscv/boot.c            |   2 +-
 target/riscv/cpu.c         | 183 ++++++++++++++++++++++++++-------------------
 target/riscv/gdbstub.c     |  12 ++-
 target/riscv/kvm/kvm-cpu.c |  10 +--
 target/riscv/machine.c     |   7 +-
 target/riscv/tcg/tcg-cpu.c |  44 ++---------
 target/riscv/translate.c   |   3 +-
 8 files changed, 134 insertions(+), 131 deletions(-)
---
base-commit: 977542ded7e6b28d2bc077bcda24568c716e393c
change-id: 20231213-riscv-fcc9640986cf

Best regards,
-- 
Akihiko Odaki <akihiko.odaki@daynix.com>