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kbuild, bpf: Enable --btf_features=attributes

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pahole v1.30 has a BTF encoding feature for arbitrary attributes, used
in particular for tagging bpf_arena_alloc_pages and
bpf_arena_free_pages BPF kfuncs [1][2].

Enable it for the kernel build.

[1] https://lore.kernel.org/bpf/20250130201239.1429648-1-ihor.solodrai@linux.dev/
[2] https://lore.kernel.org/bpf/20250228194654.1022535-1-ihor.solodrai@linux.dev/

Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Tested-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://patch.msgid.link/20250414185918.538195-1-ihor.solodrai@linux.dev
This commit is contained in:
Ihor Solodrai 2025-04-14 11:59:18 -07:00 committed by Martin KaFai Lau
parent 7d0b43b68d
commit 21cb33c7e0
1 changed files with 2 additions and 0 deletions
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2
scripts/Makefile.btf
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@ -23,6 +23,8 @@ else
# Switch to using --btf_features for v1.26 and later. # Switch to using --btf_features for v1.26 and later.
pahole-flags-$(call test-ge, $(pahole-ver), 126) = -j$(JOBS) --btf_features=encode_force,var,float,enum64,decl_tag,type_tag,optimized_func,consistent_func,decl_tag_kfuncs pahole-flags-$(call test-ge, $(pahole-ver), 126) = -j$(JOBS) --btf_features=encode_force,var,float,enum64,decl_tag,type_tag,optimized_func,consistent_func,decl_tag_kfuncs
pahole-flags-$(call test-ge, $(pahole-ver), 130) += --btf_features=attributes
ifneq ($(KBUILD_EXTMOD),) ifneq ($(KBUILD_EXTMOD),)
module-pahole-flags-$(call test-ge, $(pahole-ver), 128) += --btf_features=distilled_base module-pahole-flags-$(call test-ge, $(pahole-ver), 128) += --btf_features=distilled_base
endif endif