[PATCH bpf-next v2 0/7] Add support cpu v4 insns for RV64

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Add support cpu v4 instructions for RV64. The relevant tests have passed as show bellow:

# ./test_progs-cpuv4 -a ldsx_insn,verifier_sdiv,verifier_movsx,verifier_ldsx,verifier_gotol,verifier_bswap
#116/1   ldsx_insn/map_val and probed_memory:OK
#116/2   ldsx_insn/ctx_member_sign_ext:OK
#116/3   ldsx_insn/ctx_member_narrow_sign_ext:OK
#116     ldsx_insn:OK
#309/1   verifier_bswap/BSWAP, 16:OK
#309/2   verifier_bswap/BSWAP, 16 @unpriv:OK
#309/3   verifier_bswap/BSWAP, 32:OK
#309/4   verifier_bswap/BSWAP, 32 @unpriv:OK
#309/5   verifier_bswap/BSWAP, 64:OK
#309/6   verifier_bswap/BSWAP, 64 @unpriv:OK
#309     verifier_bswap:OK
#323/1   verifier_gotol/gotol, small_imm:OK
#323/2   verifier_gotol/gotol, small_imm @unpriv:OK
#323     verifier_gotol:OK
#331/1   verifier_ldsx/LDSX, S8:OK
#331/2   verifier_ldsx/LDSX, S8 @unpriv:OK
#331/3   verifier_ldsx/LDSX, S16:OK
#331/4   verifier_ldsx/LDSX, S16 @unpriv:OK
#331/5   verifier_ldsx/LDSX, S32:OK
#331/6   verifier_ldsx/LDSX, S32 @unpriv:OK
#331/7   verifier_ldsx/LDSX, S8 range checking, privileged:OK
#331/8   verifier_ldsx/LDSX, S16 range checking:OK
#331/9   verifier_ldsx/LDSX, S16 range checking @unpriv:OK
#331/10  verifier_ldsx/LDSX, S32 range checking:OK
#331/11  verifier_ldsx/LDSX, S32 range checking @unpriv:OK
#331     verifier_ldsx:OK
#342/1   verifier_movsx/MOV32SX, S8:OK
#342/2   verifier_movsx/MOV32SX, S8 @unpriv:OK
#342/3   verifier_movsx/MOV32SX, S16:OK
#342/4   verifier_movsx/MOV32SX, S16 @unpriv:OK
#342/5   verifier_movsx/MOV64SX, S8:OK
#342/6   verifier_movsx/MOV64SX, S8 @unpriv:OK
#342/7   verifier_movsx/MOV64SX, S16:OK
#342/8   verifier_movsx/MOV64SX, S16 @unpriv:OK
#342/9   verifier_movsx/MOV64SX, S32:OK
#342/10  verifier_movsx/MOV64SX, S32 @unpriv:OK
#342/11  verifier_movsx/MOV32SX, S8, range_check:OK
#342/12  verifier_movsx/MOV32SX, S8, range_check @unpriv:OK
#342/13  verifier_movsx/MOV32SX, S16, range_check:OK
#342/14  verifier_movsx/MOV32SX, S16, range_check @unpriv:OK
#342/15  verifier_movsx/MOV32SX, S16, range_check 2:OK
#342/16  verifier_movsx/MOV32SX, S16, range_check 2 @unpriv:OK
#342/17  verifier_movsx/MOV64SX, S8, range_check:OK
#342/18  verifier_movsx/MOV64SX, S8, range_check @unpriv:OK
#342/19  verifier_movsx/MOV64SX, S16, range_check:OK
#342/20  verifier_movsx/MOV64SX, S16, range_check @unpriv:OK
#342/21  verifier_movsx/MOV64SX, S32, range_check:OK
#342/22  verifier_movsx/MOV64SX, S32, range_check @unpriv:OK
#342/23  verifier_movsx/MOV64SX, S16, R10 Sign Extension:OK
#342/24  verifier_movsx/MOV64SX, S16, R10 Sign Extension @unpriv:OK
#342     verifier_movsx:OK
#354/1   verifier_sdiv/SDIV32, non-zero imm divisor, check 1:OK
#354/2   verifier_sdiv/SDIV32, non-zero imm divisor, check 1 @unpriv:OK
#354/3   verifier_sdiv/SDIV32, non-zero imm divisor, check 2:OK
#354/4   verifier_sdiv/SDIV32, non-zero imm divisor, check 2 @unpriv:OK
#354/5   verifier_sdiv/SDIV32, non-zero imm divisor, check 3:OK
#354/6   verifier_sdiv/SDIV32, non-zero imm divisor, check 3 @unpriv:OK
#354/7   verifier_sdiv/SDIV32, non-zero imm divisor, check 4:OK
#354/8   verifier_sdiv/SDIV32, non-zero imm divisor, check 4 @unpriv:OK
#354/9   verifier_sdiv/SDIV32, non-zero imm divisor, check 5:OK
#354/10  verifier_sdiv/SDIV32, non-zero imm divisor, check 5 @unpriv:OK
#354/11  verifier_sdiv/SDIV32, non-zero imm divisor, check 6:OK
#354/12  verifier_sdiv/SDIV32, non-zero imm divisor, check 6 @unpriv:OK
#354/13  verifier_sdiv/SDIV32, non-zero imm divisor, check 7:OK
#354/14  verifier_sdiv/SDIV32, non-zero imm divisor, check 7 @unpriv:OK
#354/15  verifier_sdiv/SDIV32, non-zero imm divisor, check 8:OK
#354/16  verifier_sdiv/SDIV32, non-zero imm divisor, check 8 @unpriv:OK
#354/17  verifier_sdiv/SDIV32, non-zero reg divisor, check 1:OK
#354/18  verifier_sdiv/SDIV32, non-zero reg divisor, check 1 @unpriv:OK
#354/19  verifier_sdiv/SDIV32, non-zero reg divisor, check 2:OK
#354/20  verifier_sdiv/SDIV32, non-zero reg divisor, check 2 @unpriv:OK
#354/21  verifier_sdiv/SDIV32, non-zero reg divisor, check 3:OK
#354/22  verifier_sdiv/SDIV32, non-zero reg divisor, check 3 @unpriv:OK
#354/23  verifier_sdiv/SDIV32, non-zero reg divisor, check 4:OK
#354/24  verifier_sdiv/SDIV32, non-zero reg divisor, check 4 @unpriv:OK
#354/25  verifier_sdiv/SDIV32, non-zero reg divisor, check 5:OK
#354/26  verifier_sdiv/SDIV32, non-zero reg divisor, check 5 @unpriv:OK
#354/27  verifier_sdiv/SDIV32, non-zero reg divisor, check 6:OK
#354/28  verifier_sdiv/SDIV32, non-zero reg divisor, check 6 @unpriv:OK
#354/29  verifier_sdiv/SDIV32, non-zero reg divisor, check 7:OK
#354/30  verifier_sdiv/SDIV32, non-zero reg divisor, check 7 @unpriv:OK
#354/31  verifier_sdiv/SDIV32, non-zero reg divisor, check 8:OK
#354/32  verifier_sdiv/SDIV32, non-zero reg divisor, check 8 @unpriv:OK
#354/33  verifier_sdiv/SDIV64, non-zero imm divisor, check 1:OK
#354/34  verifier_sdiv/SDIV64, non-zero imm divisor, check 1 @unpriv:OK
#354/35  verifier_sdiv/SDIV64, non-zero imm divisor, check 2:OK
#354/36  verifier_sdiv/SDIV64, non-zero imm divisor, check 2 @unpriv:OK
#354/37  verifier_sdiv/SDIV64, non-zero imm divisor, check 3:OK
#354/38  verifier_sdiv/SDIV64, non-zero imm divisor, check 3 @unpriv:OK
#354/39  verifier_sdiv/SDIV64, non-zero imm divisor, check 4:OK
#354/40  verifier_sdiv/SDIV64, non-zero imm divisor, check 4 @unpriv:OK
#354/41  verifier_sdiv/SDIV64, non-zero imm divisor, check 5:OK
#354/42  verifier_sdiv/SDIV64, non-zero imm divisor, check 5 @unpriv:OK
#354/43  verifier_sdiv/SDIV64, non-zero imm divisor, check 6:OK
#354/44  verifier_sdiv/SDIV64, non-zero imm divisor, check 6 @unpriv:OK
#354/45  verifier_sdiv/SDIV64, non-zero reg divisor, check 1:OK
#354/46  verifier_sdiv/SDIV64, non-zero reg divisor, check 1 @unpriv:OK
#354/47  verifier_sdiv/SDIV64, non-zero reg divisor, check 2:OK
#354/48  verifier_sdiv/SDIV64, non-zero reg divisor, check 2 @unpriv:OK
#354/49  verifier_sdiv/SDIV64, non-zero reg divisor, check 3:OK
#354/50  verifier_sdiv/SDIV64, non-zero reg divisor, check 3 @unpriv:OK
#354/51  verifier_sdiv/SDIV64, non-zero reg divisor, check 4:OK
#354/52  verifier_sdiv/SDIV64, non-zero reg divisor, check 4 @unpriv:OK
#354/53  verifier_sdiv/SDIV64, non-zero reg divisor, check 5:OK
#354/54  verifier_sdiv/SDIV64, non-zero reg divisor, check 5 @unpriv:OK
#354/55  verifier_sdiv/SDIV64, non-zero reg divisor, check 6:OK
#354/56  verifier_sdiv/SDIV64, non-zero reg divisor, check 6 @unpriv:OK
#354/57  verifier_sdiv/SMOD32, non-zero imm divisor, check 1:OK
#354/58  verifier_sdiv/SMOD32, non-zero imm divisor, check 1 @unpriv:OK
#354/59  verifier_sdiv/SMOD32, non-zero imm divisor, check 2:OK
#354/60  verifier_sdiv/SMOD32, non-zero imm divisor, check 2 @unpriv:OK
#354/61  verifier_sdiv/SMOD32, non-zero imm divisor, check 3:OK
#354/62  verifier_sdiv/SMOD32, non-zero imm divisor, check 3 @unpriv:OK
#354/63  verifier_sdiv/SMOD32, non-zero imm divisor, check 4:OK
#354/64  verifier_sdiv/SMOD32, non-zero imm divisor, check 4 @unpriv:OK
#354/65  verifier_sdiv/SMOD32, non-zero imm divisor, check 5:OK
#354/66  verifier_sdiv/SMOD32, non-zero imm divisor, check 5 @unpriv:OK
#354/67  verifier_sdiv/SMOD32, non-zero imm divisor, check 6:OK
#354/68  verifier_sdiv/SMOD32, non-zero imm divisor, check 6 @unpriv:OK
#354/69  verifier_sdiv/SMOD32, non-zero reg divisor, check 1:OK
#354/70  verifier_sdiv/SMOD32, non-zero reg divisor, check 1 @unpriv:OK
#354/71  verifier_sdiv/SMOD32, non-zero reg divisor, check 2:OK
#354/72  verifier_sdiv/SMOD32, non-zero reg divisor, check 2 @unpriv:OK
#354/73  verifier_sdiv/SMOD32, non-zero reg divisor, check 3:OK
#354/74  verifier_sdiv/SMOD32, non-zero reg divisor, check 3 @unpriv:OK
#354/75  verifier_sdiv/SMOD32, non-zero reg divisor, check 4:OK
#354/76  verifier_sdiv/SMOD32, non-zero reg divisor, check 4 @unpriv:OK
#354/77  verifier_sdiv/SMOD32, non-zero reg divisor, check 5:OK
#354/78  verifier_sdiv/SMOD32, non-zero reg divisor, check 5 @unpriv:OK
#354/79  verifier_sdiv/SMOD32, non-zero reg divisor, check 6:OK
#354/80  verifier_sdiv/SMOD32, non-zero reg divisor, check 6 @unpriv:OK
#354/81  verifier_sdiv/SMOD64, non-zero imm divisor, check 1:OK
#354/82  verifier_sdiv/SMOD64, non-zero imm divisor, check 1 @unpriv:OK
#354/83  verifier_sdiv/SMOD64, non-zero imm divisor, check 2:OK
#354/84  verifier_sdiv/SMOD64, non-zero imm divisor, check 2 @unpriv:OK
#354/85  verifier_sdiv/SMOD64, non-zero imm divisor, check 3:OK
#354/86  verifier_sdiv/SMOD64, non-zero imm divisor, check 3 @unpriv:OK
#354/87  verifier_sdiv/SMOD64, non-zero imm divisor, check 4:OK
#354/88  verifier_sdiv/SMOD64, non-zero imm divisor, check 4 @unpriv:OK
#354/89  verifier_sdiv/SMOD64, non-zero imm divisor, check 5:OK
#354/90  verifier_sdiv/SMOD64, non-zero imm divisor, check 5 @unpriv:OK
#354/91  verifier_sdiv/SMOD64, non-zero imm divisor, check 6:OK
#354/92  verifier_sdiv/SMOD64, non-zero imm divisor, check 6 @unpriv:OK
#354/93  verifier_sdiv/SMOD64, non-zero imm divisor, check 7:OK
#354/94  verifier_sdiv/SMOD64, non-zero imm divisor, check 7 @unpriv:OK
#354/95  verifier_sdiv/SMOD64, non-zero imm divisor, check 8:OK
#354/96  verifier_sdiv/SMOD64, non-zero imm divisor, check 8 @unpriv:OK
#354/97  verifier_sdiv/SMOD64, non-zero reg divisor, check 1:OK
#354/98  verifier_sdiv/SMOD64, non-zero reg divisor, check 1 @unpriv:OK
#354/99  verifier_sdiv/SMOD64, non-zero reg divisor, check 2:OK
#354/100 verifier_sdiv/SMOD64, non-zero reg divisor, check 2 @unpriv:OK
#354/101 verifier_sdiv/SMOD64, non-zero reg divisor, check 3:OK
#354/102 verifier_sdiv/SMOD64, non-zero reg divisor, check 3 @unpriv:OK
#354/103 verifier_sdiv/SMOD64, non-zero reg divisor, check 4:OK
#354/104 verifier_sdiv/SMOD64, non-zero reg divisor, check 4 @unpriv:OK
#354/105 verifier_sdiv/SMOD64, non-zero reg divisor, check 5:OK
#354/106 verifier_sdiv/SMOD64, non-zero reg divisor, check 5 @unpriv:OK
#354/107 verifier_sdiv/SMOD64, non-zero reg divisor, check 6:OK
#354/108 verifier_sdiv/SMOD64, non-zero reg divisor, check 6 @unpriv:OK
#354/109 verifier_sdiv/SMOD64, non-zero reg divisor, check 7:OK
#354/110 verifier_sdiv/SMOD64, non-zero reg divisor, check 7 @unpriv:OK
#354/111 verifier_sdiv/SMOD64, non-zero reg divisor, check 8:OK
#354/112 verifier_sdiv/SMOD64, non-zero reg divisor, check 8 @unpriv:OK
#354/113 verifier_sdiv/SDIV32, zero divisor:OK
#354/114 verifier_sdiv/SDIV32, zero divisor @unpriv:OK
#354/115 verifier_sdiv/SDIV64, zero divisor:OK
#354/116 verifier_sdiv/SDIV64, zero divisor @unpriv:OK
#354/117 verifier_sdiv/SMOD32, zero divisor:OK
#354/118 verifier_sdiv/SMOD32, zero divisor @unpriv:OK
#354/119 verifier_sdiv/SMOD64, zero divisor:OK
#354/120 verifier_sdiv/SMOD64, zero divisor @unpriv:OK
#354     verifier_sdiv:OK
Summary: 6/166 PASSED, 0 SKIPPED, 0 FAILED

NOTE: ldsx_insn testcase uses fentry and needs to rely on ftrace direct call [0].
[0] https://lore.kernel.org/all/20230627111612.761164-1-suagrfillet@xxxxxxxxx/

v2:
- Use temporary reg to avoid clobbering the source reg in movs_8/16 insns. (Björn)
- Add Acked-by

v1:
https://lore.kernel.org/bpf/20230823231059.3363698-1-pulehui@xxxxxxxxxxxxxxx

Pu Lehui (7):
  riscv, bpf: Fix missing exception handling and redundant zext for
    LDX_B/H/W
  riscv, bpf: Support sign-extension load insns
  riscv, bpf: Support sign-extension mov insns
  riscv, bpf: Support 32-bit offset jmp insn
  riscv, bpf: Support signed div/mod insns
  riscv, bpf: Support unconditional bswap insn
  selftests/bpf: Enable cpu v4 tests for RV64

 arch/riscv/net/bpf_jit.h                      |  30 ++++++
 arch/riscv/net/bpf_jit_comp64.c               | 102 ++++++++++++++----
 .../selftests/bpf/progs/test_ldsx_insn.c      |   3 +-
 .../selftests/bpf/progs/verifier_bswap.c      |   3 +-
 .../selftests/bpf/progs/verifier_gotol.c      |   3 +-
 .../selftests/bpf/progs/verifier_ldsx.c       |   3 +-
 .../selftests/bpf/progs/verifier_movsx.c      |   3 +-
 .../selftests/bpf/progs/verifier_sdiv.c       |   3 +-
 8 files changed, 122 insertions(+), 28 deletions(-)

-- 
2.39.2





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