netdev - [PATCH bpf-next v3 0/3] bpf, arm64: enable kfunc call

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Date:   Sun, 30 Jan 2022 17:29:14 +0800
From:   Hou Tao <hotforest@...il.com>
To:     Daniel Borkmann <daniel@...earbox.net>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andrii@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        netdev@...r.kernel.org, bpf@...r.kernel.org, houtao1@...wei.com,
        Zi Shen Lim <zlim.lnx@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Ard Biesheuvel <ard.biesheuvel@....com>,
        linux-arm-kernel@...ts.infradead.org, Hou Tao <hotforest@...il.com>
Subject: [PATCH bpf-next v3 0/3] bpf, arm64: enable kfunc call

Hi,

The simple patchset tries to enable kfunc call for arm64. Patch #1 just
overrides bpf_jit_supports_kfunc_call() to enable kfunc call, patch #2
unexports the subtests in ksyms_module.c to fix the confusion in test
output and patch #3 add a test in ksyms_module.c to ensure s32 is
sufficient for kfunc offset.

Change Log:
v3:
  * patch #2: newly-addded to unexport unnecessary subtests
  * patch #3: use kallsyms_find() instead of reimplementing it.
  * patch #3: ensure kfunc call is supported before checking
              whether s32 will be overflowed or not.

v2: https://lore.kernel.org/bpf/20220127071532.384888-1-houtao1@huawei.com/
  * add a test to check whether imm will be overflowed for kfunc call

v1: https://lore.kernel.org/bpf/20220119144942.305568-1-houtao1@huawei.com

Hou Tao (3):
  bpf, arm64: enable kfunc call
  selftests/bpf: do not export subtest as standalone test
  selftests/bpf: check whether s32 is sufficient for kfunc offset

 arch/arm64/net/bpf_jit_comp.c                 |  5 ++
 .../selftests/bpf/prog_tests/ksyms_module.c   | 46 ++++++++++++++++++-
 .../bpf/prog_tests/xdp_adjust_frags.c         |  6 ---
 .../bpf/prog_tests/xdp_adjust_tail.c          |  4 +-
 .../bpf/prog_tests/xdp_cpumap_attach.c        |  4 +-
 .../bpf/prog_tests/xdp_devmap_attach.c        |  2 +-
 6 files changed, 54 insertions(+), 13 deletions(-)

-- 
2.20.1