linux-kernel - Re: [PATCHv6 11/13] arm64/kexec: Select KEXEC

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Message-Id: <2d40ab992df9466e9d09c1132deda3b362de58b3b22f938cf4beae7d6398bf18@mail.kernel.org>
Date: Mon, 19 Jan 2026 18:45:34 +0000 (UTC)
From: bot+bpf-ci@...nel.org
To: piliu@...hat.com,linux-arm-kernel@...ts.infradead.org
Cc: piliu@...hat.com,davem@...emloft.net,ast@...nel.org,daniel@...earbox.net,john.fastabend@...il.com,andrii@...nel.org,martin.lau@...ux.dev,eddyz87@...il.com,song@...nel.org,yonghong.song@...ux.dev,jeremy.linton@....com,catalin.marinas@....com,will@...nel.org,ardb@...nel.org,horms@...nel.org,kraxel@...hat.com,vkuznets@...hat.com,prudo@...hat.com,vmalik@...hat.com,kernel@...rr.cc,bhe@...hat.com,dyoung@...hat.com,akpm@...ux-foundation.org,kexec@...ts.infradead.org,bpf@...r.kernel.org,systemd-devel@...ts.freedesktop.org,linux-kernel@...r.kernel.org,ast@...nel.org,andrii@...nel.org,daniel@...earbox.net,martin.lau@...nel.org,eddyz87@...il.com,yonghong.song@...ux.dev,clm@...a.com,ihor.solodrai@...ux.dev
Subject: Re: [PATCHv6 11/13] arm64/kexec: Select KEXEC_BPF to support UEFI-style kernel image

> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
> index 93173f0a09c7..922d58abbbd6 100644
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> @@ -1587,6 +1587,7 @@ config ARCH_SELECTS_KEXEC_FILE
>  	def_bool y
>  	depends on KEXEC_FILE
>  	select HAVE_IMA_KEXEC if IMA
> +	select KEXEC_BPF if DEBUG_INFO_BTF && BPF_SYSCALL
                          ^^^

Should this condition also include KEEP_DECOMPRESSOR?

In kernel/Kconfig.kexec, KEXEC_BPF has:

    depends on DEBUG_INFO_BTF && BPF_SYSCALL && KEEP_DECOMPRESSOR

Since Kconfig's select statement forces a symbol's value without visiting
the dependencies, this select will enable KEXEC_BPF even when
KEEP_DECOMPRESSOR is not set, creating an inconsistent configuration.

KEEP_DECOMPRESSOR defaults to n and nothing selects it, so this appears
to be a missing condition in the select statement.


---
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

CI run summary: https://github.com/kernel-patches/bpf/actions/runs/21147860407