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[0/4] s390/bpf: implement BPF_PROBE_MEM

Message ID 20200715123227.912866-1-iii@linux.ibm.com
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Series s390/bpf: implement BPF_PROBE_MEM | expand

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Ilya Leoshkevich July 15, 2020, 12:32 p.m. UTC 
This patch series implements BPF_PROBE_MEM opcode, which is used in BPF
programs that walk chains of kernel pointers. It consists of two parts:
patches 1 and 2 enhance s390 exception table infrastructure, patches 3
and 4 contains the actual implementation and the test.

We would like to take this series via s390 tree, because it contains
dependent s390 extable and bpf jit changes. However, it would be great
if someone knowledgeable could review patches 3 and 4.

Ilya Leoshkevich (4):
  s390/kernel: unify EX_TABLE* implementations
  s390/kernel: expand the exception table logic to allow new handling
    options
  s390/bpf: implement BPF_PROBE_MEM
  selftests/bpf: add exception handling test

 arch/s390/include/asm/asm-const.h             |  12 ++
 arch/s390/include/asm/extable.h               |  50 ++++++-
 arch/s390/include/asm/linkage.h               |  35 ++---
 arch/s390/kernel/kprobes.c                    |   4 +-
 arch/s390/kernel/traps.c                      |   7 +-
 arch/s390/mm/fault.c                          |   4 +-
 arch/s390/net/bpf_jit_comp.c                  | 138 +++++++++++++++++-
 scripts/sorttable.c                           |  25 ++++
 .../selftests/bpf/prog_tests/bpf_iter.c       |  17 +++
 .../selftests/bpf/progs/bpf_iter_exception.c  |  20 +++
 10 files changed, 272 insertions(+), 40 deletions(-)
 create mode 100644 arch/s390/include/asm/asm-const.h
 create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_exception.c