Hi all, This series adds big-endian data support for RISC-V system emulation. Following the discussion on previous versions, this series models fixed-endian harts, not a mixed-endian implementation where software can toggle MBE/SBE/UBE at runtime. The reset value of MBE/SBE/UBE is selected from the CPU configuration. These bits remain outside the mstatus/mstatush/sstatus writable masks, so they are effectively hardwired to 0 for the default little-endian CPUs and to 1 when `big-endian=on`. The user-visible `big-endian` CPU property is exposed only after the data path, boot path, and page-table walk support are in place, so the series remains bisectable.
Djordje Todorovic (7): target/riscv: Define MSTATUS_SBE and MSTATUS_MBE bit masks target/riscv: Add big-endian CPU configuration field and reset logic target/riscv: Implement runtime data endianness via MSTATUS bits hw/riscv: Make boot code endianness-aware at runtime target/riscv: Fix page table walk endianness for big-endian harts target/riscv: Expose big-endian CPU property and add documentation target/riscv: Add endianness test for RISC-V BE docs/system/target-riscv.rst | 29 +++++++ hw/riscv/boot.c | 81 ++++++++++++++++--- include/hw/riscv/boot.h | 1 + target/riscv/cpu.c | 15 ++-- target/riscv/cpu.h | 23 ++++++ target/riscv/cpu_bits.h | 2 + target/riscv/cpu_cfg_fields.h.inc | 1 + target/riscv/cpu_helper.c | 28 +++++-- target/riscv/insn_trans/trans_rva.c.inc | 4 +- target/riscv/insn_trans/trans_rvd.c.inc | 4 +- target/riscv/insn_trans/trans_rvf.c.inc | 4 +- target/riscv/insn_trans/trans_rvi.c.inc | 8 +- target/riscv/insn_trans/trans_rvzacas.c.inc | 4 +- target/riscv/insn_trans/trans_rvzalasr.c.inc | 4 +- target/riscv/insn_trans/trans_rvzce.c.inc | 4 +- target/riscv/insn_trans/trans_rvzfh.c.inc | 4 +- target/riscv/insn_trans/trans_rvzicfiss.c.inc | 4 +- target/riscv/insn_trans/trans_xmips.c.inc | 8 +- target/riscv/insn_trans/trans_xthead.c.inc | 16 ++-- target/riscv/insn_trans/trans_zilsd.c.inc | 4 +- target/riscv/internals.h | 9 +-- target/riscv/tcg/tcg-cpu.c | 3 + target/riscv/translate.c | 22 ++--- tests/functional/riscv64/meson.build | 1 + tests/functional/riscv64/test_endianness.py | 57 +++++++++++++ 25 files changed, 260 insertions(+), 80 deletions(-) create mode 100644 tests/functional/riscv64/test_endianness.py -- 2.34.1
