From nobody Tue Dec 30 13:12:51 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 25F52C48BD7 for ; Wed, 15 Nov 2023 14:15:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344162AbjKOOP5 (ORCPT ); Wed, 15 Nov 2023 09:15:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344116AbjKOOP4 (ORCPT ); Wed, 15 Nov 2023 09:15:56 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E98CDB3 for ; Wed, 15 Nov 2023 06:15:51 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D367FC433C7; Wed, 15 Nov 2023 14:15:48 +0000 (UTC) From: Huacai Chen To: Arnd Bergmann , Huacai Chen Cc: loongarch@lists.linux.dev, linux-arch@vger.kernel.org, Xuefeng Li , Guo Ren , Xuerui Wang , Jiaxun Yang , linux-kernel@vger.kernel.org, loongson-kernel@lists.loongnix.cn, Huacai Chen Subject: [PATCH] LoongArch: Silence the boot warning about 'nokaslr' Date: Wed, 15 Nov 2023 22:15:30 +0800 Message-Id: <20231115141530.2534778-1-chenhuacai@loongson.cn> X-Mailer: git-send-email 2.39.3 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The kernel parameter 'nokaslr' is handled before start_kernel(), so we don't need early_param() to mark it technically. But it can cause a boot warning as follows: Unknown kernel command line parameters "nokaslr", will be passed to user sp= ace. When we use 'init=3D/bin/bash', 'nokaslr' which passed to user space will even cause a kernel panic. So we use early_param() to mark 'nokaslr', simply print a notice and silence the boot warning (also fix a potential panic). This logic is similar to RISC-V. Signed-off-by: Huacai Chen --- arch/loongarch/kernel/relocate.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/loongarch/kernel/relocate.c b/arch/loongarch/kernel/reloc= ate.c index 6c3eff9af9fb..c2f5c2bdeb7f 100644 --- a/arch/loongarch/kernel/relocate.c +++ b/arch/loongarch/kernel/relocate.c @@ -102,6 +102,14 @@ static inline __init unsigned long get_random_boot(voi= d) return hash; } =20 +static int __init nokaslr(char *p) +{ + pr_info("KASLR is disabled.\n"); + + return 0; /* Print a notice and silence the boot warning */ +} +early_param("nokaslr", nokaslr); + static inline __init bool kaslr_disabled(void) { char *str; --=20 2.39.3