[PATCH v6 00/25] target/riscv: MSTATUS_SUM + cleanups

[Richard Henderson]

This builds on Fei and Zhiwei's SUM and TB_FLAGS changes.

  * Reclaim 5 TB_FLAGS bits, since we nearly ran out.

  * Using cpu_mmu_index(env, true) is insufficient to implement
    HLVX properly.  While that chooses the correct mmu_idx, it
    does not perform the read with execute permission.
    I add a new tcg interface to perform a read-for-execute with
    an arbitrary mmu_idx.  This is still not 100% compliant, but
    it's closer.

  * Handle mstatus.MPV in cpu_mmu_index.
  * Use vsstatus.SUM when required for MMUIdx_S_SUM.
  * Cleanups for get_physical_address.

While this passes check-avocado, I'm sure that's insufficient.
Please have a close look.


r~


Fei Wu (2):
  target/riscv: Separate priv from mmu_idx
  target/riscv: Reduce overhead of MSTATUS_SUM change

LIU Zhiwei (4):
  target/riscv: Extract virt enabled state from tb flags
  target/riscv: Add a general status enum for extensions
  target/riscv: Encode the FS and VS on a normal way for tb flags
  target/riscv: Add a tb flags field for vstart

Richard Henderson (19):
  target/riscv: Remove mstatus_hs_{fs,vs} from tb_flags
  accel/tcg: Add cpu_ld*_code_mmu
  target/riscv: Use cpu_ld*_code_mmu for HLVX
  target/riscv: Handle HLV, HSV via helpers
  target/riscv: Rename MMU_HYP_ACCESS_BIT to MMU_2STAGE_BIT
  target/riscv: Introduce mmuidx_sum
  target/riscv: Introduce mmuidx_priv
  target/riscv: Introduce mmuidx_2stage
  target/riscv: Move hstatus.spvp check to check_access_hlsv
  target/riscv: Set MMU_2STAGE_BIT in riscv_cpu_mmu_index
  target/riscv: Check SUM in the correct register
  target/riscv: Hoist second stage mode change to callers
  target/riscv: Hoist pbmte and hade out of the level loop
  target/riscv: Move leaf pte processing out of level loop
  target/riscv: Suppress pte update with is_debug
  target/riscv: Don't modify SUM with is_debug
  target/riscv: Merge checks for reserved pte flags
  target/riscv: Reorg access check in get_physical_address
  target/riscv: Reorg sum check in get_physical_address

 include/exec/cpu_ldst.h                       |   9 +
 target/riscv/cpu.h                            |  47 ++-
 target/riscv/cpu_bits.h                       |  12 +-
 target/riscv/helper.h                         |  12 +-
 target/riscv/internals.h                      |  35 ++
 accel/tcg/cputlb.c                            |  48 +++
 accel/tcg/user-exec.c                         |  58 +++
 target/riscv/cpu.c                            |   2 +-
 target/riscv/cpu_helper.c                     | 393 +++++++++---------
 target/riscv/csr.c                            |  21 +-
 target/riscv/op_helper.c                      | 113 ++++-
 target/riscv/translate.c                      |  72 ++--
 .../riscv/insn_trans/trans_privileged.c.inc   |   2 +-
 target/riscv/insn_trans/trans_rvf.c.inc       |   2 +-
 target/riscv/insn_trans/trans_rvh.c.inc       | 135 +++---
 target/riscv/insn_trans/trans_rvv.c.inc       |  22 +-
 target/riscv/insn_trans/trans_xthead.c.inc    |   7 +-
 17 files changed, 595 insertions(+), 395 deletions(-)

-- 
2.34.1