From: Daniel Axtens <dja@axtens.net>
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 <dja@axtens.net>
Subject: [PATCH v2 3/4] kasan: Document support on 32-bit powerpc
Date: Tue, 10 Dec 2019 15:47:13 +1100 [thread overview]
Message-ID: <20191210044714.27265-4-dja@axtens.net> (raw)
In-Reply-To: <20191210044714.27265-1-dja@axtens.net>
KASAN is supported on 32-bit powerpc and the docs should reflect this.
Suggested-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Daniel Axtens <dja@axtens.net>
---
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
next prev parent reply other threads:[~2019-12-10 4:47 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-10 4:47 [PATCH v2 0/4] KASAN for powerpc64 radix, plus generic mm change Daniel Axtens
2019-12-10 4:47 ` [PATCH v2 1/4] mm: define MAX_PTRS_PER_{PTE,PMD,PUD} Daniel Axtens
2019-12-10 6:35 ` Christophe Leroy
2019-12-10 9:35 ` Balbir Singh
2019-12-10 10:39 ` kbuild test robot
2019-12-10 4:47 ` [PATCH v2 2/4] kasan: use MAX_PTRS_PER_* for early shadow Daniel Axtens
2019-12-10 6:40 ` Christophe Leroy
2019-12-10 9:36 ` Balbir Singh
2019-12-10 14:39 ` Christophe Leroy
2019-12-10 4:47 ` Daniel Axtens [this message]
2019-12-10 6:40 ` [PATCH v2 3/4] kasan: Document support on 32-bit powerpc Christophe Leroy
2019-12-10 4:47 ` [PATCH v2 4/4] powerpc: Book3S 64-bit "heavyweight" KASAN support Daniel Axtens
2019-12-10 7:21 ` Christophe Leroy
2019-12-12 13:41 ` Daniel Axtens
2019-12-10 10:57 ` Balbir Singh
2019-12-11 5:21 ` Daniel Axtens
2019-12-11 8:57 ` Balbir Singh
2019-12-11 14:24 ` Daniel Axtens
2019-12-12 7:42 ` Balbir Singh
2019-12-12 9:38 ` Christophe Leroy
2019-12-12 9:56 ` Andrey Ryabinin
2019-12-10 11:20 ` kbuild test robot
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20191210044714.27265-4-dja@axtens.net \
--to=dja@axtens.net \
--cc=aneesh.kumar@linux.ibm.com \
--cc=bsingharora@gmail.com \
--cc=christophe.leroy@c-s.fr \
--cc=kasan-dev@googlegroups.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux-xtensa@linux-xtensa.org \
--cc=linuxppc-dev@lists.ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).