netdev - [PATCH v4 0/8] bpf powerpc: Add BPF_PROBE_MEM support in powerpc JIT compiler

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Date:   Wed, 29 Sep 2021 16:48:47 +0530
From:   Hari Bathini <hbathini@...ux.ibm.com>
To:     naveen.n.rao@...ux.ibm.com, christophe.leroy@...roup.eu,
        mpe@...erman.id.au, ast@...nel.org, daniel@...earbox.net
Cc:     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 v4 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 handle bad userspace
pointers for PPC64 & PPC32 cases respectively.

Changes in v4:
* 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     | 101 ++++++++++++++++++++++----
 arch/powerpc/net/bpf_jit_comp64.c     |  72 ++++++++++++++----
 5 files changed, 224 insertions(+), 42 deletions(-)

-- 
2.31.1