[bpf-next,v2,00/11] s390/bpf: Implement arena

Message

Ilya Leoshkevich July 1, 2024, 1:24 p.m. UTC

v1: https://lore.kernel.org/bpf/[e-mail]/
v1 -> v2: Add a zero-extension fix.
          Fix wrong jump offset in the BPF_XCHG implementation.
          Do not run the UAF test on x86_64 and arm64.

Hi,

This series adds arena support to the s390x JIT.
Patch 1 is a common code fix, patches 2-5 are refactorings, patches 6-9
are the implementation, and patches 10-11 deal with testing.

Best regards,
Ilya

Ilya Leoshkevich (11):
  bpf: Fix atomic probe zero-extension
  s390/bpf: Factor out emitting probe nops
  s390/bpf: Get rid of get_probe_mem_regno()
  s390/bpf: Introduce pre- and post- probe functions
  s390/bpf: Land on the next JITed instruction after exception
  s390/bpf: Support BPF_PROBE_MEM32
  s390/bpf: Support address space cast instruction
  s390/bpf: Enable arena
  s390/bpf: Support arena atomics
  selftests/bpf: Add UAF tests for arena atomics
  selftests/bpf: Remove arena tests from DENYLIST.s390x

 arch/s390/net/bpf_jit_comp.c                  | 404 ++++++++++++++----
 kernel/bpf/verifier.c                         |   3 +-
 tools/testing/selftests/bpf/DENYLIST.s390x    |   3 -
 .../selftests/bpf/prog_tests/arena_atomics.c  |  18 +
 .../selftests/bpf/progs/arena_atomics.c       |  76 ++++
 5 files changed, 408 insertions(+), 96 deletions(-)