From: Kees Cook <keescook@chromium.org>
To: Heiko Carstens <hca@linux.ibm.com>,
Sami Tolvanen <samitolvanen@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>,
Alexandra Winter <wintera@linux.ibm.com>,
Wenjia Zhang <wenjia@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Sven Schnelle <svens@linux.ibm.com>,
linux-s390@vger.kernel.org, netdev@vger.kernel.org,
Nick Desaulniers <ndesaulniers@google.com>,
Tom Rix <trix@redhat.com>,
llvm@lists.linux.dev, linux-kernel@vger.kernel.org,
patches@lists.linux.dev
Subject: Re: [PATCH 1/3] s390/ctcm: Fix return type of ctc{mp,}m_tx()
Date: Wed, 2 Nov 2022 13:01:26 -0700 [thread overview]
Message-ID: <202211021259.9169F5CBE@keescook> (raw)
In-Reply-To: <Y2LJmr8gE2I7gOP5@osiris>
On Wed, Nov 02, 2022 at 08:48:42PM +0100, Heiko Carstens wrote:
> On Wed, Nov 02, 2022 at 09:32:50AM -0700, Nathan Chancellor wrote:
> > should s390 select ARCH_SUPPORTS_CFI_CLANG in the future.
>
> Yes, s390 should select that :)
>
> But, is there any switch or option I need to set when compiling clang,
> so it knows about the kcfi sanitizer?
>
> I get:
> clang-16: error: unsupported option '-fsanitize=kcfi' for target 's390x-ibm-linux'
>
> > clang --version
> clang version 16.0.0 (https://github.com/llvm/llvm-project.git e02110e2ab4dd71b276e887483f0e6e286d243ed)
You'll need the "generic arch support": https://reviews.llvm.org/D135411
which is _almost_ landed. Testing would be welcome, for sure!
Sami, do you have any notes on what common things were needed to get
arm64 and x86_64 booting under kCFI? My only oh-so-helpful notes are
"keep CFI away from early boot code". :P
--
Kees Cook
next prev parent reply other threads:[~2022-11-02 20:01 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-02 16:32 [PATCH 1/3] s390/ctcm: Fix return type of ctc{mp,}m_tx() Nathan Chancellor
2022-11-02 16:32 ` [PATCH 2/3] s390/netiucv: Fix return type of netiucv_tx() Nathan Chancellor
2022-11-02 19:09 ` Kees Cook
2022-11-03 12:09 ` Alexandra Winter
2022-11-02 16:32 ` [PATCH 3/3] s390/lcs: Fix return type of lcs_start_xmit() Nathan Chancellor
2022-11-02 19:10 ` Kees Cook
2022-11-03 15:27 ` Alexandra Winter
2022-11-02 19:09 ` [PATCH 1/3] s390/ctcm: Fix return type of ctc{mp,}m_tx() Kees Cook
2022-11-03 11:06 ` Alexandra Winter
2022-11-02 19:48 ` Heiko Carstens
2022-11-02 19:58 ` Nathan Chancellor
2022-11-02 20:01 ` Kees Cook [this message]
2022-11-03 23:17 ` Sami Tolvanen
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