From nobody Mon Dec 1 22:04:02 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 691AE2DCBE2 for ; Fri, 28 Nov 2025 03:34:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764300883; cv=none; b=ANKTc68X1pqbaLFn/D9Y/8YyvZEcIrVQyNgjnOa0tW6+soe2ovXzc6obBA9UjkgF4Ae4P++8pysNaSVHPy67M5MDGa6ERRlVy4mP+O1CEiKjQxlE97bPVzmF0evDTBSU5lkz3j2IHIyBdfj0wSTcwS+AbL0D0p57IU5oz/yfy0c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764300883; c=relaxed/simple; bh=qf0MdaUmCbtOvQhMLo945q6n0pMs632Jvfm0NVLTop8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=OdSqlJlCXcTnYhfmp0Yhnocl/pavee/PFlJ1aKm49GGFijNcDiFDohCLJnTxHE93L/2d2SCsr4f6X17/lkIrmDrGVBFqYf9GFgxUF+fmdO/Nqenhera/vFJ1+S4d4QiWOvEJMCI/TjbOPGcNRG9F7MuSGggjDt+5lSdVd3I13wM= 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=QhrfcA6p; arc=none smtp.client-ip=170.10.129.124 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="QhrfcA6p" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1764300880; 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=pg3FSIRtMXU5szl2eh5KeSgVoSezIgfBLftf2WmfQUc=; b=QhrfcA6pDSf0bo4YoeRT79ydQ53QC89g/CIrMokfCoD7Ni0ogqs0RjmIDElw2pO2dYzjVN Yc6WNcubMTP4lHDCQs1JwXc9gbLc6k1Xydi2bn+G8ta9MY+MkQf72ROF37IjbH/w0QHs9A 7b++0F6IlUlrEpjVRga/CBq5JeL/4Ic= Received: from mx-prod-mc-08.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-479-mu9y1m2TOWCTYfgb-eI-yg-1; Thu, 27 Nov 2025 22:34:36 -0500 X-MC-Unique: mu9y1m2TOWCTYfgb-eI-yg-1 X-Mimecast-MFC-AGG-ID: mu9y1m2TOWCTYfgb-eI-yg_1764300874 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 7E7E61800359; Fri, 28 Nov 2025 03:34:34 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.7]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id D8E4419560B0; Fri, 28 Nov 2025 03:34:26 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, andreyknvl@gmail.com, glider@google.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, elver@google.com, sj@kernel.org, lorenzo.stoakes@oracle.com, snovitoll@gmail.com, christophe.leroy@csgroup.eu, Baoquan He , linuxppc-dev@lists.ozlabs.org Subject: [PATCH v4 07/12] arch/powerpc: don't initialize kasan if it's disabled Date: Fri, 28 Nov 2025 11:33:15 +0800 Message-ID: <20251128033320.1349620-8-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-1-bhe@redhat.com> References: <20251128033320.1349620-1-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 3.0 on 10.30.177.12 Content-Type: text/plain; charset="utf-8" This includes 32bit, book3s/64 and book3e/64. Signed-off-by: Baoquan He Cc: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/mm/kasan/init_32.c | 5 ++++- arch/powerpc/mm/kasan/init_book3e_64.c | 3 +++ arch/powerpc/mm/kasan/init_book3s_64.c | 3 +++ 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/kasan/init_32.c b/arch/powerpc/mm/kasan/init_3= 2.c index 1d083597464f..b0651ff9d44d 100644 --- a/arch/powerpc/mm/kasan/init_32.c +++ b/arch/powerpc/mm/kasan/init_32.c @@ -141,6 +141,9 @@ void __init kasan_init(void) u64 i; int ret; =20 + if (kasan_arg_disabled) + return; + for_each_mem_range(i, &base, &end) { phys_addr_t top =3D min(end, total_lowmem); =20 @@ -170,7 +173,7 @@ 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..f75c1e38a011 100644 --- a/arch/powerpc/mm/kasan/init_book3e_64.c +++ b/arch/powerpc/mm/kasan/init_book3e_64.c @@ -111,6 +111,9 @@ 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_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..8c6940e835d4 100644 --- a/arch/powerpc/mm/kasan/init_book3s_64.c +++ b/arch/powerpc/mm/kasan/init_book3s_64.c @@ -54,6 +54,9 @@ 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_arg_disabled) + return; + if (!early_radix_enabled()) { pr_warn("KASAN not enabled as it requires radix!"); return; --=20 2.41.0