[v3,0/8] bpf powerpc: Add BPF_PROBE_MEM support in powerpc JIT compiler

Message

Hari Bathini Sept. 21, 2021, 1:29 p.m. UTC

Patch #1 & #2 are simple cleanup patches. Patch #3 refactors JIT
compiler code with the aim to simplify adding BPF_PROBE_MEM support.
Patch #4 introduces PPC_RAW_BRANCH() macro instead of open coding
branch instruction. Patch #5 & #7 add BPF_PROBE_MEM support for PPC64
& PPC32 JIT compilers respectively. Patch #6 & #8 handle bad userspace
pointers for PPC64 & PPC32 cases respectively.

Changes in v3:
* Addressed all the review comments from Christophe.

Hari Bathini (4):
  bpf powerpc: refactor JIT compiler code
  powerpc/ppc-opcode: introduce PPC_RAW_BRANCH() macro
  bpf ppc32: Add BPF_PROBE_MEM support for JIT
  bpf ppc32: Access only if addr is kernel address

Ravi Bangoria (4):
  bpf powerpc: Remove unused SEEN_STACK
  bpf powerpc: Remove extra_pass from bpf_jit_build_body()
  bpf ppc64: Add BPF_PROBE_MEM support for JIT
  bpf ppc64: Access only if addr is kernel address

 arch/powerpc/include/asm/ppc-opcode.h |   2 +
 arch/powerpc/net/bpf_jit.h            |  19 +++--
 arch/powerpc/net/bpf_jit_comp.c       |  72 ++++++++++++++--
 arch/powerpc/net/bpf_jit_comp32.c     | 115 ++++++++++++++++++++++----
 arch/powerpc/net/bpf_jit_comp64.c     |  88 ++++++++++++++++----
 5 files changed, 254 insertions(+), 42 deletions(-)