linux-kernel - [PATCH bpf-next v3 0/3] bpf, x86: inline bpf_get_current_task() for x86

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Message-ID: <20260109082631.246647-1-dongml2@chinatelecom.cn>
Date: Fri,  9 Jan 2026 16:26:28 +0800
From: Menglong Dong <menglong8.dong@...il.com>
To: ast@...nel.org,
	eddyz87@...il.com
Cc: daniel@...earbox.net,
	john.fastabend@...il.com,
	andrii@...nel.org,
	martin.lau@...ux.dev,
	song@...nel.org,
	yonghong.song@...ux.dev,
	kpsingh@...nel.org,
	sdf@...ichev.me,
	haoluo@...gle.com,
	jolsa@...nel.org,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH bpf-next v3 0/3] bpf, x86: inline bpf_get_current_task() for x86_64

Inline bpf_get_current_task() and bpf_get_current_task_btf() for x86_64
to obtain better performance, and add the testcase for it.

Changes since v2:
* implement it in the verifier with BPF_MOV64_PERCPU_REG() instead of in
  x86_64 JIT (Alexei).

Changes since v1:
* add the testcase
* remove the usage of const_current_task

Menglong Dong (3):
  bpf, x86: inline bpf_get_current_task() for x86_64
  selftests/bpf: add TEST_TAG_KCONFIG_CHECK to test_loader
  selftests/bpf: test the jited inline of bpf_get_current_task

 kernel/bpf/verifier.c                         | 25 ++++++++++
 .../selftests/bpf/prog_tests/verifier.c       |  2 +
 tools/testing/selftests/bpf/progs/bpf_misc.h  |  3 ++
 .../selftests/bpf/progs/verifier_jit_inline.c | 36 +++++++++++++++
 tools/testing/selftests/bpf/test_loader.c     | 46 ++++++++++++++++++-
 5 files changed, 111 insertions(+), 1 deletion(-)
 create mode 100644 tools/testing/selftests/bpf/progs/verifier_jit_inline.c

-- 
2.52.0