From nobody Tue Apr 7 07:05:53 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4C5363115BC for ; Wed, 25 Feb 2026 08:16:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007378; cv=none; b=bodk5MvBMLDO0867zPI0blzPdydpJuBtn2V+jdDQuxzZaS1MwQbCKMbdMTIie8S7NapdvMIy8bz+Ve6SyarGNH+Rjr7GrY7N09ZTlOaJeMkxEc0abvtfQCaDtgy59I3p1NZt+T+Wbq9br3IIMrIEYrjkS9CRbGXthM2DI+EjeXU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007378; c=relaxed/simple; bh=hmRsU+h9C7bdkyWjJGwtbPdzr2AqxYKCI+/j2w33tns=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=nHo/7moAGjh/YLkwr6ADAVB3qZUxM63ZTOv+JAXMMXZW4DC036f/C3EuteQos+RFPP/NPwUsyQAGZJrt9k1A+t5LQqVBBU5yaF086hJpag1rIrkEDwml3bCgzhLuiIm4iuaNH4PUPHfEBQFTdGhm/LJC/RGFWhxWmbvX7ZEc5Ow= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=c79YTB5d; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="c79YTB5d" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007376; 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=3+N2FdzBXq7d0qBg17oIVx0hpSGWg6PAf2XJ4iYnD3A=; b=c79YTB5dADik5Q5ZG4JqorEhC9/JEfKOcUe3+boTm9VzMjkrfWaA+8XWYVRPxq8WmLHy2W JNM8tid1psfVpbrtHZVqN1wsUL4TjDcSJsNfXAtR/0IAyStg2BnoxPZvu55T5d/KMVECFA vmT8La4yRm3XlOKjmkfibLfFVq+eS+A= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-36-5bDMHpyIN7qY2J9aFw6T_w-1; Wed, 25 Feb 2026 03:16:11 -0500 X-MC-Unique: 5bDMHpyIN7qY2J9aFw6T_w-1 X-Mimecast-MFC-AGG-ID: 5bDMHpyIN7qY2J9aFw6T_w_1772007369 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-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 4C83718003F6; Wed, 25 Feb 2026 08:16:09 +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 50E031800465; Wed, 25 Feb 2026 08:15:58 +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 09/15] arch/powerpc: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:06 +0800 Message-ID: <20260225081412.76502-10-bhe@redhat.com> In-Reply-To: <20260225081412.76502-1-bhe@redhat.com> References: <20260225081412.76502-1-bhe@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Content-Type: text/plain; charset="utf-8" Here, kasan is disabled if specified 'kasan=3Doff' in kernel cmdline. This includes 32bit, book3s/64 and book3e/64. Signed-off-by: Baoquan He Cc: linuxppc-dev@lists.ozlabs.org Tested-by: Sourabh Jain --- arch/powerpc/mm/kasan/init_32.c | 6 +++++- arch/powerpc/mm/kasan/init_book3e_64.c | 4 ++++ arch/powerpc/mm/kasan/init_book3s_64.c | 4 ++++ 3 files changed, 13 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/kasan/init_32.c b/arch/powerpc/mm/kasan/init_3= 2.c index 1d083597464f..0ea2a636c992 100644 --- a/arch/powerpc/mm/kasan/init_32.c +++ b/arch/powerpc/mm/kasan/init_32.c @@ -141,6 +141,10 @@ void __init kasan_init(void) u64 i; int ret; =20 + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; + for_each_mem_range(i, &base, &end) { phys_addr_t top =3D min(end, total_lowmem); =20 @@ -170,7 +174,7 @@ void __init kasan_init(void) =20 void __init kasan_late_init(void) { - if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) + if (IS_ENABLED(CONFIG_KASAN_VMALLOC) && kasan_enabled()) kasan_unmap_early_shadow_vmalloc(); } =20 diff --git a/arch/powerpc/mm/kasan/init_book3e_64.c b/arch/powerpc/mm/kasan= /init_book3e_64.c index 0d3a73d6d4b0..fbe4c9a7e460 100644 --- a/arch/powerpc/mm/kasan/init_book3e_64.c +++ b/arch/powerpc/mm/kasan/init_book3e_64.c @@ -111,6 +111,10 @@ void __init kasan_init(void) u64 i; pte_t zero_pte =3D pfn_pte(virt_to_pfn(kasan_early_shadow_page), PAGE_KER= NEL_RO); =20 + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; + for_each_mem_range(i, &start, &end) kasan_init_phys_region(phys_to_virt(start), phys_to_virt(end)); =20 diff --git a/arch/powerpc/mm/kasan/init_book3s_64.c b/arch/powerpc/mm/kasan= /init_book3s_64.c index dcafa641804c..f7906f9ef9be 100644 --- a/arch/powerpc/mm/kasan/init_book3s_64.c +++ b/arch/powerpc/mm/kasan/init_book3s_64.c @@ -54,6 +54,10 @@ void __init kasan_init(void) u64 i; pte_t zero_pte =3D pfn_pte(virt_to_pfn(kasan_early_shadow_page), PAGE_KER= NEL); =20 + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; + if (!early_radix_enabled()) { pr_warn("KASAN not enabled as it requires radix!"); return; --=20 2.52.0