[PATCH 2/3] powerpc/{32,book3e}: kcsan: Extend KCSAN Support

[PATCH 2/3] powerpc/{32,book3e}: kcsan: Extend KCSAN Support

[Christophe Leroy]

From: Rohan McLure <rmclure@linux.ibm.com>

Enable HAVE_ARCH_KCSAN on all powerpc platforms, permitting use of the
kernel concurrency sanitiser through the CONFIG_KCSAN_* kconfig options.

Boots and passes selftests on 32-bit and 64-bit platforms. See
documentation in Documentation/dev-tools/kcsan.rst for more information.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 539d1f03ff42..2f6af3cb75d6 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -211,7 +211,7 @@ config PPC
 	select HAVE_ARCH_KASAN			if PPC_RADIX_MMU
 	select HAVE_ARCH_KASAN			if PPC_BOOK3E_64
 	select HAVE_ARCH_KASAN_VMALLOC		if HAVE_ARCH_KASAN
-	select HAVE_ARCH_KCSAN            	if PPC_BOOK3S_64
+	select HAVE_ARCH_KCSAN
 	select HAVE_ARCH_KFENCE			if ARCH_SUPPORTS_DEBUG_PAGEALLOC
 	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
 	select HAVE_ARCH_WITHIN_STACK_FRAMES
-- 
2.40.1

[PATCH 2/3] powerpc/{32,book3e}: kcsan: Extend KCSAN Support

[Christophe Leroy]

From: Rohan McLure <rmclure@linux.ibm.com>

Enable HAVE_ARCH_KCSAN on all powerpc platforms, permitting use of the
kernel concurrency sanitiser through the CONFIG_KCSAN_* kconfig options.

Boots and passes selftests on 32-bit and 64-bit platforms. See
documentation in Documentation/dev-tools/kcsan.rst for more information.

Signed-off-by: Rohan McLure <rmclure@linux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 539d1f03ff42..2f6af3cb75d6 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -211,7 +211,7 @@ config PPC
 	select HAVE_ARCH_KASAN			if PPC_RADIX_MMU
 	select HAVE_ARCH_KASAN			if PPC_BOOK3E_64
 	select HAVE_ARCH_KASAN_VMALLOC		if HAVE_ARCH_KASAN
-	select HAVE_ARCH_KCSAN            	if PPC_BOOK3S_64
+	select HAVE_ARCH_KCSAN
 	select HAVE_ARCH_KFENCE			if ARCH_SUPPORTS_DEBUG_PAGEALLOC
 	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
 	select HAVE_ARCH_WITHIN_STACK_FRAMES
-- 
2.40.1

Re: [PATCH 2/3] powerpc/{32,book3e}: kcsan: Extend KCSAN Support

[kernel test robot]

In-Reply-To: <1a1138966780c3709f55bde8a0eb80209fa4395d.1683892665.git.christophe.leroy@csgroup.eu>
References: <1a1138966780c3709f55bde8a0eb80209fa4395d.1683892665.git.christophe.leroy@csgroup.eu>
TO: Christophe Leroy <christophe.leroy@csgroup.eu>
TO: Marco Elver <elver@google.com>
TO: Dmitry Vyukov <dvyukov@google.com>
TO: "Paul E. McKenney" <paulmck@kernel.org>
TO: Michael Ellerman <mpe@ellerman.id.au>
TO: Nicholas Piggin <npiggin@gmail.com>
TO: Chris Zankel <chris@zankel.net>
TO: Max Filippov <jcmvbkbc@gmail.com>
CC: Christophe Leroy <christophe.leroy@csgroup.eu>
CC: linux-kernel@vger.kernel.org
CC: linuxppc-dev@lists.ozlabs.org
CC: kasan-dev@googlegroups.com
CC: Rohan McLure <rmclure@linux.ibm.com>

Hi Christophe,

kernel test robot noticed the following build errors:

[auto build test ERROR on powerpc/next]
[also build test ERROR on powerpc/fixes linus/master v6.4-rc1 next-20230512]
[cannot apply to jcmvbkbc-xtensa/xtensa-for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Christophe-Leroy/kcsan-Don-t-expect-64-bits-atomic-builtins-from-32-bits-architectures/20230512-235101
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
patch link:    https://lore.kernel.org/r/1a1138966780c3709f55bde8a0eb80209fa4395d.1683892665.git.christophe.leroy%40csgroup.eu
patch subject: [PATCH 2/3] powerpc/{32,book3e}: kcsan: Extend KCSAN Support
config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20230513/202305131357.vxOBOWIx-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project b0fb98227c90adf2536c9ad644a74d5e92961111)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/9e591fe641be3e363dceca189200359619af5539
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Christophe-Leroy/kcsan-Don-t-expect-64-bits-atomic-builtins-from-32-bits-architectures/20230512-235101
        git checkout 9e591fe641be3e363dceca189200359619af5539
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc prepare

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202305131357.vxOBOWIx-lkp@intel.com/

All errors (new ones prefixed by >>):

   scripts/genksyms/parse.y: warning: 9 shift/reduce conflicts [-Wconflicts-sr]
   scripts/genksyms/parse.y: warning: 5 reduce/reduce conflicts [-Wconflicts-rr]
   scripts/genksyms/parse.y: note: rerun with option '-Wcounterexamples' to generate conflict counterexamples
>> clang: error: unsupported option '-fsanitize=thread' for target 'powerpc-unknown-linux-gnu'
>> clang: error: unsupported option '-fsanitize=thread' for target 'powerpc-unknown-linux-gnu'
   make[2]: *** [scripts/Makefile.build:252: scripts/mod/empty.o] Error 1
   make[2]: *** [scripts/Makefile.build:114: scripts/mod/devicetable-offsets.s] Error 1
   make[2]: Target 'scripts/mod/' not remade because of errors.
   make[1]: *** [Makefile:1286: prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:226: __sub-make] Error 2
   make: Target 'prepare' not remade because of errors.

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests