linux-kernel - Re: [PATCH v7] arm64/module: Use text-poke API for late relocations.

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Message-ID: <20250612151859.GD12912@willie-the-truck>
Date: Thu, 12 Jun 2025 16:18:59 +0100
From: Will Deacon <will@...nel.org>
To: Dylan Hatch <dylanbhatch@...gle.com>
Cc: Catalin Marinas <catalin.marinas@....com>,
	Ard Biesheuvel <ardb@...nel.org>,
	Sami Tolvanen <samitolvanen@...gle.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Song Liu <song@...nel.org>, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Roman Gushchin <roman.gushchin@...ux.dev>,
	Toshiyuki Sato <fj6611ie@...jp.fujitsu.com>
Subject: Re: [PATCH v7] arm64/module: Use text-poke API for late relocations.

On Tue, Jun 03, 2025 at 10:34:17PM +0000, Dylan Hatch wrote:
> To enable late module patching, livepatch modules need to be able to
> apply some of their relocations well after being loaded. In this
> scenario however, the livepatch module text and data is already RX-only,
> so special treatment is needed to make the late relocations possible. To
> do this, use the text-poking API for these late relocations.
> 
> This patch is partially based off commit 88fc078a7a8f6 ("x86/module: Use
> text_poke() for late relocations").
> 
> Signed-off-by: Dylan Hatch <dylanbhatch@...gle.com>
> Acked-by: Song Liu <song@...nel.org>
> ---
>  arch/arm64/kernel/module.c | 101 +++++++++++++++++++++----------------
>  1 file changed, 57 insertions(+), 44 deletions(-)

Thanks for sticking with this, Dylan:

Acked-by: Will Deacon <will@...nel.org>

Catalin, I assume you'll pick this up for 6.17.

Cheers,

Will