linux-kernel - Re: [PATCH] RISC-V: Make CONFIG

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Message-ID: <87ee86ajig.fsf@igel.home>
Date:   Wed, 27 Oct 2021 11:45:27 +0200
From:   Andreas Schwab <schwab@...ux-m68k.org>
To:     Alexandre Ghiti <alexandre.ghiti@...onical.com>
Cc:     Palmer Dabbelt <palmer@...belt.com>, alex@...ti.fr,
        Paul Walmsley <paul.walmsley@...ive.com>,
        aou@...s.berkeley.edu, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, kernel-team@...roid.com,
        Palmer Dabbelt <palmerdabbelt@...gle.com>
Subject: Re: [PATCH] RISC-V: Make CONFIG_RELOCATABLE user selectable

On Okt 27 2021, Alexandre Ghiti wrote:

> On Wed, Oct 27, 2021 at 10:03 AM Andreas Schwab <schwab@...ux-m68k.org> wrote:
>>
>> On Okt 26 2021, Palmer Dabbelt wrote:
>>
>> > +config RELOCATABLE
>> > +     bool "Build a relocatable kernel"
>> > +     depends on MMU && 64BIT && !XIP_KERNEL
>> > +     help
>> > +          This builds a kernel as a Position Independent Executable (PIE),
>> > +          which retains all relocation metadata required to relocate the
>> > +          kernel binary at runtime to a different virtual address than the
>> > +          address it was linked at.
>> > +          Since RISCV uses the RELA relocation format, this requires a
>> > +          relocation pass at runtime even if the kernel is loaded at the
>> > +          same address it was linked at.
>>
>> When in doubt, do what?
>
> Then do not enable.

Please add that to the help string.

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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