在 2021/9/14 2:50, Feiyang Chen 写道:

Convert MIPS to use the generic entry infrastructure from
kernel/entry/*.

v2: Use regs->regs[27] to mark whether to restore all registers in
handle_sys and enable IRQ stack.

Hi Feiyang,

Thanks for your patch, could you please expand how could this improve 
the performance?

Thanks.
- Jiaxun

Feiyang Chen (2):
   MIPS: convert syscall to generic entry
   MIPS: convert irq to generic entry

  arch/mips/Kconfig                         |   1 +
  arch/mips/include/asm/entry-common.h      |  13 ++
  arch/mips/include/asm/irqflags.h          |  42 ----
  arch/mips/include/asm/ptrace.h            |   8 +-
  arch/mips/include/asm/sim.h               |  70 -------
  arch/mips/include/asm/stackframe.h        |   8 +
  arch/mips/include/asm/syscall.h           |   5 +
  arch/mips/include/asm/thread_info.h       |  17 +-
  arch/mips/include/uapi/asm/ptrace.h       |   7 +-
  arch/mips/kernel/Makefile                 |  14 +-
  arch/mips/kernel/entry.S                  | 143 +-------------
  arch/mips/kernel/genex.S                  | 150 +++------------
  arch/mips/kernel/head.S                   |   1 -
  arch/mips/kernel/linux32.c                |   1 -
  arch/mips/kernel/ptrace.c                 |  78 --------
  arch/mips/kernel/r4k-bugs64.c             |  14 +-
  arch/mips/kernel/scall.S                  | 136 +++++++++++++
  arch/mips/kernel/scall32-o32.S            | 223 ---------------------
  arch/mips/kernel/scall64-n32.S            | 107 ----------
  arch/mips/kernel/scall64-n64.S            | 116 -----------
  arch/mips/kernel/scall64-o32.S            | 221 ---------------------
  arch/mips/kernel/signal.c                 |  59 +-----
  arch/mips/kernel/signal_n32.c             |  15 +-
  arch/mips/kernel/signal_o32.c             |  29 +--
  arch/mips/kernel/syscall.c                | 148 +++++++++++---
  arch/mips/kernel/syscalls/syscall_n32.tbl |   8 +-
  arch/mips/kernel/syscalls/syscall_n64.tbl |   8 +-
  arch/mips/kernel/syscalls/syscall_o32.tbl |   8 +-
  arch/mips/kernel/traps.c                  | 225 ++++++++++++++++------
  arch/mips/kernel/unaligned.c              |  19 +-
  arch/mips/mm/c-octeon.c                   |  15 ++
  arch/mips/mm/cex-oct.S                    |   8 +-
  arch/mips/mm/fault.c                      |  12 +-
  arch/mips/mm/tlbex-fault.S                |   7 +-
  34 files changed, 594 insertions(+), 1342 deletions(-)
  create mode 100644 arch/mips/include/asm/entry-common.h
  delete mode 100644 arch/mips/include/asm/sim.h
  create mode 100644 arch/mips/kernel/scall.S
  delete mode 100644 arch/mips/kernel/scall32-o32.S
  delete mode 100644 arch/mips/kernel/scall64-n32.S
  delete mode 100644 arch/mips/kernel/scall64-n64.S
  delete mode 100644 arch/mips/kernel/scall64-o32.S