From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3E242EFD202 for ; Wed, 25 Feb 2026 08:15:48 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4fLS8L5n79z3dVJ; Wed, 25 Feb 2026 19:15:46 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1772007346; cv=none; b=jWDli3uAHAqApATejCdbyiVyE2QGWpi9zhlx/TxzsHjE5n5q60sTy8yYcB5di9+kiJYxopk9+YL6WOdvQhBTLOWTw+VogGr0rCc5kmPzq/TvS43MCHNgFQl7sKuqgeIjSR+HQ6QgPFOHetMeOV2+Rz/arvnkUkQHvUtlil5R8e5vRmgybCjXna3lhxoRpVLYjRpMCE44Jg6QbCapdu0hZTMRse5wulxGYzoKd2l49Uca1VlpT4thmEyrrdXESwb9FdPbOC5gOUO5ltg6ysvOqAxjFw9V5N1KOdDJc4LrvaZ09y/CPu+d9TvPi3sNqFBlhJ2L+RX4KdLMj2vzGZia6A== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1772007346; c=relaxed/relaxed; bh=I228xoUl4+ZrgdKCBvI2rCmcNIzmRojWxOXL2gQGmtk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=TeGTjskKqSWsokxEauaoXPR709D8F4E/Z8BoYJSqMO4aYLJtfMcW1XN6GbVi5rN4V5xGBXntBl7+HykwEy4cAZh3WiSbC/a/4Amf/19gV/mlJ6V7MXdgTjgakVDbce3eq7WQ9gN+1Dl9k9Z7fhznn9j0Ko7ucBor1ccyH+1oVzFJS/Q6MUOPyUkdaR/ucqXV9x0Vlpx4XXeNAFNpBcHzynrseE2W+aM9qUR2VovCia5USGlr7hwRdvFjakeRiA6PsqoGdxuHW7Cl7kiGb6J/KtWE1MjLQ9edWYEujqvicEcK0j8vB+09zKSdEeX2JCBXiMvmtLDIvPXJPtGNcdqmBQ== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=dObQvKzz; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=dObQvKzz; dkim-atps=neutral; spf=pass (client-ip=170.10.129.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=bhe@redhat.com; receiver=lists.ozlabs.org) smtp.mailfrom=redhat.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=dObQvKzz; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=dObQvKzz; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=redhat.com (client-ip=170.10.129.124; helo=us-smtp-delivery-124.mimecast.com; envelope-from=bhe@redhat.com; receiver=lists.ozlabs.org) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4fLS8K6XcDz3dSV for ; Wed, 25 Feb 2026 19:15:45 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007343; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=I228xoUl4+ZrgdKCBvI2rCmcNIzmRojWxOXL2gQGmtk=; b=dObQvKzzD3MdQN93tAvBIg+Xp3mE40a5QCNv6TVVFKN54TmYsMAPebWcQUlVGzt5181dvx lOqG2dY9Kdq5zsCIGeMo0NNnKKJraKpakz8ZWMKYitVxbpunJYa1IPI7T8UL//pIARW7LE 6zGZljXunaB0J7lRTN/BaMFmS+7QrDw= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007343; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=I228xoUl4+ZrgdKCBvI2rCmcNIzmRojWxOXL2gQGmtk=; b=dObQvKzzD3MdQN93tAvBIg+Xp3mE40a5QCNv6TVVFKN54TmYsMAPebWcQUlVGzt5181dvx lOqG2dY9Kdq5zsCIGeMo0NNnKKJraKpakz8ZWMKYitVxbpunJYa1IPI7T8UL//pIARW7LE 6zGZljXunaB0J7lRTN/BaMFmS+7QrDw= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-675-rwD-1e3zOqOiSldVPhFTdg-1; Wed, 25 Feb 2026 03:15:40 -0500 X-MC-Unique: rwD-1e3zOqOiSldVPhFTdg-1 X-Mimecast-MFC-AGG-ID: rwD-1e3zOqOiSldVPhFTdg_1772007338 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 01DB51956070; Wed, 25 Feb 2026 08:15:38 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.55]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 68EB31800286; Wed, 25 Feb 2026 08:15:29 +0000 (UTC) From: Baoquan He To: kasan-dev@googlegroups.com Cc: linux-mm@kvack.org, andreyknvl@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, dvyukov@google.com, linux-kernel@vger.kernel.org, linux-um@lists.infradead.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, x86@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com, linux-s390@vger.kernel.org, hca@linux.ibm.com, Baoquan He Subject: [PATCH v5 06/15] arch/arm: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:03 +0800 Message-ID: <20260225081412.76502-7-bhe@redhat.com> In-Reply-To: <20260225081412.76502-1-bhe@redhat.com> References: <20260225081412.76502-1-bhe@redhat.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mimecast-MFC-PROC-ID: xHWm3nFnZ4YGHiNlQEbJPl3ZCYod3tlDU3BcfmXndAw_1772007338 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit Here, kasan is disabled if specified 'kasan=off' in kernel cmdline. And also call jump_label_init() early in setup_arch() so that later kasan_init() can enable static key kasan_flag_enabled. Put jump_label_init() beofre parse_early_param() as other architectures do. Signed-off-by: Baoquan He Cc: linux-arm-kernel@lists.infradead.org --- arch/arm/kernel/setup.c | 6 ++++++ arch/arm/mm/kasan_init.c | 3 +++ 2 files changed, 9 insertions(+) diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 0bfd66c7ada0..453a47a4c715 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -1135,6 +1135,12 @@ void __init setup_arch(char **cmdline_p) early_fixmap_init(); early_ioremap_init(); + /* + * Initialise the static keys early as they may be enabled by the + * kasan_init() or early parameters. + */ + jump_label_init(); + parse_early_param(); #ifdef CONFIG_MMU diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c index c6625e808bf8..82ec043c891f 100644 --- a/arch/arm/mm/kasan_init.c +++ b/arch/arm/mm/kasan_init.c @@ -212,6 +212,9 @@ void __init kasan_init(void) phys_addr_t pa_start, pa_end; u64 i; + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; /* * We are going to perform proper setup of shadow memory. * -- 2.52.0