From: Nathan Chancellor <nathan@kernel.org>
To: kernel test robot <lkp@intel.com>
Cc: Boqun Feng <boqun.feng@gmail.com>,
llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [peterz-queue:core/wip-u128 14/14] arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m
Date: Tue, 27 Dec 2022 11:07:30 -0700 [thread overview]
Message-ID: <Y6s0Yongvkn1WoIK@dev-arch.thelio-3990X> (raw)
In-Reply-To: <202212272348.xvp2fQTy-lkp@intel.com>
On Tue, Dec 27, 2022 at 11:27:57PM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git core/wip-u128
> head: c05419246aa69cd3ff3f929e232ebed1b5b49c2d
> commit: c05419246aa69cd3ff3f929e232ebed1b5b49c2d [14/14] atomic: Add test cases for cmpxchg128 family
> config: arm-randconfig-r046-20221226
> compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project f5700e7b69048de958172fb513b336564e7f8709)
> 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 arm cross compiling tool for clang build
> # apt-get install binutils-arm-linux-gnueabi
> # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=c05419246aa69cd3ff3f929e232ebed1b5b49c2d
> git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
> git fetch --no-tags peterz-queue core/wip-u128
> git checkout c05419246aa69cd3ff3f929e232ebed1b5b49c2d
> # save the config file
> mkdir build_dir && cp config build_dir/.config
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash lib/
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
>
> All errors (new ones prefixed by >>):
>
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> >> arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m
> "1: ldrexd %1, %H1, [%3]\n"
> ^
> <inline asm>:1:5: note: instantiated into assembly here
> 1: ldrexd r4, r5, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> arch/arm/include/asm/cmpxchg.h:258:2: error: instruction requires: !armv*m
> " strexd %0, %5, %H5, [%3]\n"
> ^
> <inline asm>:5:2: note: instantiated into assembly here
> strexd r1, r6, r7, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> >> arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m
> "1: ldrexd %1, %H1, [%3]\n"
> ^
> <inline asm>:1:5: note: instantiated into assembly here
> 1: ldrexd r6, r7, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> arch/arm/include/asm/cmpxchg.h:258:2: error: instruction requires: !armv*m
> " strexd %0, %5, %H5, [%3]\n"
> ^
> <inline asm>:5:2: note: instantiated into assembly here
> strexd r1, r4, r5, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> >> arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m
> "1: ldrexd %1, %H1, [%3]\n"
> ^
> <inline asm>:1:5: note: instantiated into assembly here
> 1: ldrexd r6, r7, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> arch/arm/include/asm/cmpxchg.h:258:2: error: instruction requires: !armv*m
> " strexd %0, %5, %H5, [%3]\n"
> ^
> <inline asm>:5:2: note: instantiated into assembly here
> strexd r1, r4, r5, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> >> arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m
> "1: ldrexd %1, %H1, [%3]\n"
> ^
> <inline asm>:1:5: note: instantiated into assembly here
> 1: ldrexd r6, r7, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> arch/arm/include/asm/cmpxchg.h:258:2: error: instruction requires: !armv*m
> " strexd %0, %5, %H5, [%3]\n"
> ^
> <inline asm>:5:2: note: instantiated into assembly here
> strexd r1, r4, r5, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> >> arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m
> "1: ldrexd %1, %H1, [%3]\n"
> ^
> <inline asm>:1:5: note: instantiated into assembly here
> 1: ldrexd r6, r7, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> arch/arm/include/asm/cmpxchg.h:258:2: error: instruction requires: !armv*m
> " strexd %0, %5, %H5, [%3]\n"
> ^
> <inline asm>:5:2: note: instantiated into assembly here
> strexd r1, r4, r5, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> >> arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m
> "1: ldrexd %1, %H1, [%3]\n"
> ^
> <inline asm>:1:5: note: instantiated into assembly here
> 1: ldrexd r6, r7, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> arch/arm/include/asm/cmpxchg.h:258:2: error: instruction requires: !armv*m
> " strexd %0, %5, %H5, [%3]\n"
> ^
> <inline asm>:5:2: note: instantiated into assembly here
> strexd r1, r4, r5, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> >> arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m
> "1: ldrexd %1, %H1, [%3]\n"
> ^
> <inline asm>:1:5: note: instantiated into assembly here
> 1: ldrexd r6, r7, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> arch/arm/include/asm/cmpxchg.h:258:2: error: instruction requires: !armv*m
> " strexd %0, %5, %H5, [%3]\n"
> ^
> <inline asm>:5:2: note: instantiated into assembly here
> strexd r1, r4, r5, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> >> arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m
> "1: ldrexd %1, %H1, [%3]\n"
> ^
> <inline asm>:1:5: note: instantiated into assembly here
> 1: ldrexd r6, r7, [r0]
> ^
> In file included from lib/atomic64_test.c:12:
> In file included from include/linux/kernel.h:22:
> In file included from include/linux/bitops.h:68:
> In file included from arch/arm/include/asm/bitops.h:245:
> In file included from include/asm-generic/bitops/lock.h:5:
> In file included from include/linux/atomic.h:7:
> In file included from arch/arm/include/asm/atomic.h:16:
> arch/arm/include/asm/cmpxchg.h:258:2: error: instruction requires: !armv*m
> " strexd %0, %5, %H5, [%3]\n"
> ^
> <inline asm>:5:2: note: instantiated into assembly here
> strexd r1, r4, r5, [r0]
> ^
> 16 errors generated.
GAS's error message is a little more informative as to what is going on.
/tmp/cccn02Dg.s: Assembler messages:
/tmp/cccn02Dg.s:6048: Error: selected processor does not support `ldrexd r0,r1,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6052: Error: selected processor does not support `strexd r2,r6,r7,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6090: Error: selected processor does not support `ldrexd r0,r1,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6094: Error: selected processor does not support `strexd r2,r6,r7,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6133: Error: selected processor does not support `ldrexd r0,r1,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6137: Error: selected processor does not support `strexd r2,r6,r7,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6175: Error: selected processor does not support `ldrexd r0,r1,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6179: Error: selected processor does not support `strexd r2,r6,r7,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6219: Error: selected processor does not support `ldrexd r0,r1,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6223: Error: selected processor does not support `strexd r2,r6,r7,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6263: Error: selected processor does not support `ldrexd r0,r1,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6267: Error: selected processor does not support `strexd r2,r6,r7,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6311: Error: selected processor does not support `ldrexd r0,r1,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6315: Error: selected processor does not support `strexd r2,r6,r7,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6356: Error: selected processor does not support `ldrexd r0,r1,[r3]' in Thumb mode
/tmp/cccn02Dg.s:6360: Error: selected processor does not support `strexd r2,r6,r7,[r3]' in Thumb mode
which leads to looking at the config:
$ rg 'CPU_(V|32)|THUMB2' .config
265:CONFIG_CPU_V7M=y
268:CONFIG_CPU_32v7M=y
273:CONFIG_CPU_V7M_NUM_IRQ=90
311:CONFIG_THUMB2_KERNEL=y
CONFIG_GENERIC_ATOMIC64 is selected for CONFIG_CPU_V7M, presumably to
avoid using these instructions, based on the other CONFIGs in that
select statement in arch/arm/Kconfig? I am not sure how the test needs
to cope with that but hopefully that makes it a little more obvious what
is happening here.
Cheers,
Nathan
prev parent reply other threads:[~2022-12-27 18:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-27 15:27 [peterz-queue:core/wip-u128 14/14] arch/arm/include/asm/cmpxchg.h:254:1: error: instruction requires: !armv*m kernel test robot
2022-12-27 18:07 ` Nathan Chancellor [this message]
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