linux-kernel - [RFC PATCH v2 5/5] btf: add CONFIG_BPF_SORT_BTF_BY_KIND

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251020093941.548058-6-dolinux.peng@gmail.com>
Date: Mon, 20 Oct 2025 17:39:41 +0800
From: Donglin Peng <dolinux.peng@...il.com>
To: ast@...nel.org
Cc: linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org,
	Donglin Peng <dolinux.peng@...il.com>,
	Eduard Zingerman <eddyz87@...il.com>,
	Andrii Nakryiko <andrii.nakryiko@...il.com>,
	Alan Maguire <alan.maguire@...cle.com>,
	Song Liu <song@...nel.org>,
	pengdonglin <pengdonglin@...omi.com>
Subject: [RFC PATCH v2 5/5] btf: add CONFIG_BPF_SORT_BTF_BY_KIND_NAME

Pahole v1.32 and later supports BTF sorting. Add a new configuration
option to control whether to enable this feature for vmlinux and
kernel modules.

Cc: Eduard Zingerman <eddyz87@...il.com>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc: Alan Maguire <alan.maguire@...cle.com>
Cc: Song Liu <song@...nel.org>
Signed-off-by: pengdonglin <pengdonglin@...omi.com>
Signed-off-by: Donglin Peng <dolinux.peng@...il.com>
---
 kernel/bpf/Kconfig   | 8 ++++++++
 scripts/Makefile.btf | 5 +++++
 2 files changed, 13 insertions(+)

diff --git a/kernel/bpf/Kconfig b/kernel/bpf/Kconfig
index eb3de35734f0..08251a250f06 100644
--- a/kernel/bpf/Kconfig
+++ b/kernel/bpf/Kconfig
@@ -101,4 +101,12 @@ config BPF_LSM
 
 	  If you are unsure how to answer this question, answer N.
 
+config BPF_SORT_BTF_BY_KIND_NAME
+	bool "Sort BTF types by kind and name"
+	depends on BPF_SYSCALL
+	help
+	  This option sorts BTF types in vmlinux and kernel modules by their
+	  kind and name, enabling binary search for btf_find_by_name_kind()
+	  and significantly improving its lookup performance.
+
 endmenu # "BPF subsystem"
diff --git a/scripts/Makefile.btf b/scripts/Makefile.btf
index db76335dd917..3f1a0b3c3f3f 100644
--- a/scripts/Makefile.btf
+++ b/scripts/Makefile.btf
@@ -29,6 +29,11 @@ ifneq ($(KBUILD_EXTMOD),)
 module-pahole-flags-$(call test-ge, $(pahole-ver), 128) += --btf_features=distilled_base
 endif
 
+ifeq ($(call test-ge, $(pahole-ver), 132),y)
+pahole-flags-$(CONFIG_BPF_SORT_BTF_BY_KIND_NAME) 	+= --btf_features=sort
+module-pahole-flags-$(CONFIG_BPF_SORT_BTF_BY_KIND_NAME) += --btf_features=sort
+endif
+
 endif
 
 pahole-flags-$(CONFIG_PAHOLE_HAS_LANG_EXCLUDE)		+= --lang_exclude=rust
-- 
2.34.1