netdev - [PATCH v2 0/8] bpf powerpc: Add BPF_PROBE_MEM support in powerpc JIT compiler

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Date:   Fri, 17 Sep 2021 21:00:39 +0530
From:   Hari Bathini <hbathini@...ux.ibm.com>
To:     naveen.n.rao@...ux.ibm.com, mpe@...erman.id.au, ast@...nel.org,
        daniel@...earbox.net
Cc:     christophe.leroy@...roup.eu, paulus@...ba.org, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org,
        Hari Bathini <hbathini@...ux.ibm.com>
Subject: [PATCH v2 0/8] bpf powerpc: Add BPF_PROBE_MEM support in powerpc JIT compiler

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 add explicit
addr > TASK_SIZE_MAX check to handle bad userspace pointers for
PPC64 & PPC32 cases respectively.

Link to v1 posted by Ravi:

  https://lore.kernel.org/all/20210706073211.349889-1-ravi.bangoria@linux.ibm.com/
  ("[PATCH 0/4] bpf powerpc: Add BPF_PROBE_MEM support for 64bit JIT")


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: Add addr > TASK_SIZE_MAX explicit check

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: Add addr > TASK_SIZE_MAX explicit check

 arch/powerpc/include/asm/ppc-opcode.h |   2 +
 arch/powerpc/net/bpf_jit.h            |  19 ++--
 arch/powerpc/net/bpf_jit_comp.c       |  75 ++++++++++++++--
 arch/powerpc/net/bpf_jit_comp32.c     | 123 +++++++++++++++++++++-----
 arch/powerpc/net/bpf_jit_comp64.c     | 114 ++++++++++++++++--------
 5 files changed, 260 insertions(+), 73 deletions(-)

-- 
2.31.1