linux-kernel - Re: [PATCH 2/2] arm64: Implement HAVE

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Message-ID: <alpine.LSU.2.21.2503121503340.12980@pobox.suse.cz>
Date: Wed, 12 Mar 2025 15:05:07 +0100 (CET)
From: Miroslav Benes <mbenes@...e.cz>
To: Song Liu <song@...nel.org>
cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
    linux-toolchains@...r.kernel.org, live-patching@...r.kernel.org, 
    indu.bhagat@...cle.com, puranjay@...nel.org, wnliu@...gle.com, 
    irogers@...gle.com, joe.lawrence@...hat.com, jpoimboe@...nel.org, 
    mark.rutland@....com, peterz@...radead.org, roman.gushchin@...ux.dev, 
    rostedt@...dmis.org, will@...nel.org, kernel-team@...a.com, 
    Suraj Jitindar Singh <surajjs@...zon.com>, Torsten Duwe <duwe@...e.de>
Subject: Re: [PATCH 2/2] arm64: Implement HAVE_LIVEPATCH

Hi,

On Fri, 7 Mar 2025, Song Liu wrote:

> This is largely based on [1] by Suraj Jitindar Singh.
> 
> Test coverage:
> 
> - Passed manual tests with samples/livepatch.
> - Passed all but test-kprobe.sh in selftests/livepatch.
>   test-kprobe.sh is expected to fail, because arm64 doesn't have
>   KPROBES_ON_FTRACE.

Correct. The test should take into account and bail out.

> - Passed tests with kpatch-build [2]. (This version includes commits that
>   are not merged to upstream kpatch yet).
> 
> [1] https://lore.kernel.org/all/20210604235930.603-1-surajjs@amazon.com/
> [2] https://github.com/liu-song-6/kpatch/tree/fb-6.13
> Cc: Suraj Jitindar Singh <surajjs@...zon.com>
> Cc: Torsten Duwe <duwe@...e.de>
> Signed-off-by: Song Liu <song@...nel.org>

Acked-by: Miroslav Benes <mbenes@...e.cz>

Also as mentioned in the other thread, parts of this patch will go once 
arm64 is converted to generic entry infrastructure.

Thank you,
Miroslav