From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Axtens Subject: [PATCH v2 3/4] kasan: Document support on 32-bit powerpc Date: Tue, 10 Dec 2019 15:47:13 +1100 Message-ID: <20191210044714.27265-4-dja@axtens.net> References: <20191210044714.27265-1-dja@axtens.net> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20191210044714.27265-1-dja@axtens.net> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kasan-dev@googlegroups.com, christophe.leroy@c-s.fr, aneesh.kumar@linux.ibm.com, bsingharora@gmail.com Cc: Daniel Axtens List-Id: linux-arch.vger.kernel.org KASAN is supported on 32-bit powerpc and the docs should reflect this. Suggested-by: Christophe Leroy Signed-off-by: Daniel Axtens --- Documentation/dev-tools/kasan.rst | 3 ++- Documentation/powerpc/kasan.txt | 12 ++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) create mode 100644 Documentation/powerpc/kasan.txt diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst index e4d66e7c50de..4af2b5d2c9b4 100644 --- a/Documentation/dev-tools/kasan.rst +++ b/Documentation/dev-tools/kasan.rst @@ -22,7 +22,8 @@ global variables yet. Tag-based KASAN is only supported in Clang and requires version 7.0.0 or later. Currently generic KASAN is supported for the x86_64, arm64, xtensa and s390 -architectures, and tag-based KASAN is supported only for arm64. +architectures. It is also supported on 32-bit powerpc kernels. Tag-based KASAN +is supported only on arm64. Usage ----- diff --git a/Documentation/powerpc/kasan.txt b/Documentation/powerpc/kasan.txt new file mode 100644 index 000000000000..a85ce2ff8244 --- /dev/null +++ b/Documentation/powerpc/kasan.txt @@ -0,0 +1,12 @@ +KASAN is supported on powerpc on 32-bit only. + +32 bit support +============== + +KASAN is supported on both hash and nohash MMUs on 32-bit. + +The shadow area sits at the top of the kernel virtual memory space above the +fixmap area and occupies one eighth of the total kernel virtual memory space. + +Instrumentation of the vmalloc area is not currently supported, but modules +are. -- 2.20.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-f195.google.com ([209.85.210.195]:34129 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727039AbfLJErn (ORCPT ); Mon, 9 Dec 2019 23:47:43 -0500 Received: by mail-pf1-f195.google.com with SMTP id n13so8414205pff.1 for ; Mon, 09 Dec 2019 20:47:43 -0800 (PST) From: Daniel Axtens Subject: [PATCH v2 3/4] kasan: Document support on 32-bit powerpc Date: Tue, 10 Dec 2019 15:47:13 +1100 Message-ID: <20191210044714.27265-4-dja@axtens.net> In-Reply-To: <20191210044714.27265-1-dja@axtens.net> References: <20191210044714.27265-1-dja@axtens.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-arch-owner@vger.kernel.org List-ID: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kasan-dev@googlegroups.com, christophe.leroy@c-s.fr, aneesh.kumar@linux.ibm.com, bsingharora@gmail.com Cc: Daniel Axtens Message-ID: <20191210044713.soZv2FkSab7e1Q5YJBlRRl9bbSqhlH2-qbyYn_sOg-A@z> KASAN is supported on 32-bit powerpc and the docs should reflect this. Suggested-by: Christophe Leroy Signed-off-by: Daniel Axtens --- Documentation/dev-tools/kasan.rst | 3 ++- Documentation/powerpc/kasan.txt | 12 ++++++++++++ 2 files changed, 14 insertions(+), 1 deletion(-) create mode 100644 Documentation/powerpc/kasan.txt diff --git a/Documentation/dev-tools/kasan.rst b/Documentation/dev-tools/kasan.rst index e4d66e7c50de..4af2b5d2c9b4 100644 --- a/Documentation/dev-tools/kasan.rst +++ b/Documentation/dev-tools/kasan.rst @@ -22,7 +22,8 @@ global variables yet. Tag-based KASAN is only supported in Clang and requires version 7.0.0 or later. Currently generic KASAN is supported for the x86_64, arm64, xtensa and s390 -architectures, and tag-based KASAN is supported only for arm64. +architectures. It is also supported on 32-bit powerpc kernels. Tag-based KASAN +is supported only on arm64. Usage ----- diff --git a/Documentation/powerpc/kasan.txt b/Documentation/powerpc/kasan.txt new file mode 100644 index 000000000000..a85ce2ff8244 --- /dev/null +++ b/Documentation/powerpc/kasan.txt @@ -0,0 +1,12 @@ +KASAN is supported on powerpc on 32-bit only. + +32 bit support +============== + +KASAN is supported on both hash and nohash MMUs on 32-bit. + +The shadow area sits at the top of the kernel virtual memory space above the +fixmap area and occupies one eighth of the total kernel virtual memory space. + +Instrumentation of the vmalloc area is not currently supported, but modules +are. -- 2.20.1