libbpf: Add gating for arena globals relocation feature

[kernel-patches-daemon-bpf]

Pull request for series with
subject: libbpf: Add gating for arena globals relocation feature
version: 4
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1052850

[kernel-patches-daemon-bpf]

Upstream branch: db975de
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1052850
version: 4

[kernel-patches-review-bot]

commit 01bb8947298070a410abeb3e1ca805b5bc5a16b2
Author: Emil Tsalapatis <emil@etsalapatis.com>

libbpf: Add gating for arena globals relocation feature

This commit adds feature detection for the arena globals relocation that
was introduced in c1f61171d44b. The feature probe detects whether the
kernel includes 12a1fe6e12db which removed the 512 MiB offset limit.

> diff --git a/tools/lib/bpf/features.c b/tools/lib/bpf/features.c
> index b842b83e2480..9689e408ac58 100644
> --- a/tools/lib/bpf/features.c
> +++ b/tools/lib/bpf/features.c

[ ... ]

> @@ -581,6 +643,9 @@ static struct kern_feature_desc {
>  	[FEAT_BTF_QMARK_DATASEC] = {
>  		"BTF DATASEC names starting from '?'", probe_kern_btf_qmark_datasec,
>  	},
> +	[FEAT_LDIMM64_FULL_RANGE_OFF] = {
> +		"Full range LDIMM64 support", probe_ldimm64_full_range_off,
                 ^

Andrii requested in v3 review that the description should start with
lowercase since it appears mid-sentence in error messages like
"Detection of kernel %s support failed". Other feature descriptions
that don't start with acronyms use lowercase (e.g., "global variables",
"minimal BTF", "kernel-side __arg_ctx tag").

Should this be "full range LDIMM64 support" instead?

See: https://lore.kernel.org/bpf/CAEf4BzaLqWT1oj-EXibyAfE0ExmiaCCqhosRujDi7Y0Nyho6dA@mail.gmail.com/

> +	},
>  };

---

AI reviewed your patch. Please fix the bug or email reply why it's not a bug.
See: https://github.com/kernel-patches/vmtest/blob/master/ci/claude/README.md

In-Reply-To-Subject: libbpf: Add gating for arena globals relocation feature
CI run summary: https://github.com/kernel-patches/bpf/actions/runs/21878398162

AI-authorship-score: low
AI-authorship-explanation: The code follows standard libbpf feature probe patterns, includes iterative review responses documented in changelog, and shows natural debugging artifacts from review cycles.
issues-found: 1
issue-severity-score: low
issue-severity-explanation: Minor style issue - feature description capitalization should be lowercase to match other feature descriptions.

[kernel-patches-daemon-bpf]

Forwarding comment 3880171584 via email
In-Reply-To: 20260210184532.255475-1-emil@etsalapatis.com
Patch: https://patchwork.kernel.org/project/netdevbpf/patch/20260210184532.255475-1-emil@etsalapatis.com/

[kernel-patches-daemon-bpf]

Upstream branch: a9aabb3
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1052850
version: 4

[kernel-patches-daemon-bpf]

At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=1052850 irrelevant now. Closing PR.