linux-kernel - [PATCH v3 0/4] Fix the failure issue of the module

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Message-Id: <20251216094753.1317231-1-duanchenghao@kylinos.cn>
Date: Tue, 16 Dec 2025 17:47:49 +0800
From: Chenghao Duan <duanchenghao@...inos.cn>
To: yangtiezhu@...ngson.cn,
	rostedt@...dmis.org,
	mhiramat@...nel.org,
	mark.rutland@....com,
	hengqi.chen@...il.com,
	chenhuacai@...nel.org
Cc: kernel@...0n.name,
	zhangtianyang@...ngson.cn,
	masahiroy@...nel.org,
	linux-kernel@...r.kernel.org,
	loongarch@...ts.linux.dev,
	bpf@...r.kernel.org,
	duanchenghao@...inos.cn,
	youling.tang@...ux.dev,
	jianghaoran@...inos.cn,
	vincent.mc.li@...il.com,
	linux-trace-kernel@...r.kernel.org
Subject: [PATCH v3 0/4] Fix the failure issue of the module_attach test case

v3:
1. Adjust the position of fixup_exception() in the patch "LoongArch:
Enable exception fixup for specific ADE": move its invocation to within
the code block wrapped by irqentry_enter()/irqentry_exit().

2. Add the relevant test items to the patch commit log.

3. Adjust the sequence of patches

With the exception of the patch "LoongArch: Enable exception fixup for
specific ADE", no source code changes have been made in the other
patches.

--------------------------Changelog------------------------------------
v2:
links: https://lore.kernel.org/all/20251212091103.1247753-1-duanchenghao@kylinos.cn/
Referring to Tiezhu's suggestion, split the v1 patch titled
"LoongArch: Modify the jump logic of the trampoline" into three parts:
 (1) ftrace code
 (2) sample test
 (3) bpf code
The code logic and implementation remain unchanged.

v1:
links: https://lore.kernel.org/all/20251209093405.1309253-1-duanchenghao@kylinos.cn/
The following test cases under the tools/testing/selftests/bpf/
directory have passed the test：

./test_progs -t module_attach
./test_progs -t module_fentry_shadow
./test_progs -t subprogs
./test_progs -t subprogs_extable
./test_progs -t tailcalls
./test_progs -t struct_ops -d struct_ops_multi_pages
./test_progs -t fexit_bpf2bpf
./test_progs -t fexit_stress
./test_progs -t module_fentry_shadow
./test_progs -t fentry_test/fentry
./test_progs -t fexit_test/fexit
./test_progs -t fentry_fexit
./test_progs -t modify_return
./test_progs -t fexit_sleep
./test_progs -t test_overhead
./test_progs -t trampoline_count

Chenghao Duan (4):
  LoongArch: ftrace: Refactor register restoration in
    ftrace_common_return
  LoongArch: Enable exception fixup for specific ADE subcode
  LoongArch: BPF: Enhance trampoline support for kernel and module
    tracing
  LoongArch: ftrace: Adjust register stack restore order in direct call
    trampolines

 arch/loongarch/kernel/mcount_dyn.S          | 14 +++++---
 arch/loongarch/kernel/traps.c               |  9 ++++-
 arch/loongarch/net/bpf_jit.c                | 38 +++++++++++++++------
 samples/ftrace/ftrace-direct-modify.c       |  8 ++---
 samples/ftrace/ftrace-direct-multi-modify.c |  8 ++---
 samples/ftrace/ftrace-direct-multi.c        |  4 +--
 samples/ftrace/ftrace-direct-too.c          |  4 +--
 samples/ftrace/ftrace-direct.c              |  4 +--
 8 files changed, 59 insertions(+), 30 deletions(-)

-- 
2.25.1