Hi Greentime,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on linus/master]
[also build test ERROR on v5.9-rc4]
[cannot apply to next-20200910]
[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]

url:    https://github.com/0day-ci/linux/commits/Greentime-Hu/riscv-Add-vector-ISA-support/20200910-163426
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 7fe10096c1508c7f033d34d0741809f8eecc1ed4
config: riscv-allmodconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   arch/riscv/kernel/kernel_mode_vector.c: Assembler messages:
>> arch/riscv/kernel/kernel_mode_vector.c:88: Error: unrecognized opcode `vsetvli a5,x0,e8,m8'
   arch/riscv/kernel/kernel_mode_vector.c:89: Error: unrecognized opcode `vmv.v.i v0,0'
   arch/riscv/kernel/kernel_mode_vector.c:90: Error: unrecognized opcode `vmv.v.i v8,0'
   arch/riscv/kernel/kernel_mode_vector.c:91: Error: unrecognized opcode `vmv.v.i v16,0'
   arch/riscv/kernel/kernel_mode_vector.c:92: Error: unrecognized opcode `vmv.v.i v24,0'
>> arch/riscv/kernel/kernel_mode_vector.c:88: Error: unrecognized opcode `vsetvli a5,x0,e8,m8'
   arch/riscv/kernel/kernel_mode_vector.c:89: Error: unrecognized opcode `vmv.v.i v0,0'
   arch/riscv/kernel/kernel_mode_vector.c:90: Error: unrecognized opcode `vmv.v.i v8,0'
   arch/riscv/kernel/kernel_mode_vector.c:91: Error: unrecognized opcode `vmv.v.i v16,0'
   arch/riscv/kernel/kernel_mode_vector.c:92: Error: unrecognized opcode `vmv.v.i v24,0'

# https://github.com/0day-ci/linux/commit/1db9feafad65555b15f06c15f969b2b54d0324bb
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Greentime-Hu/riscv-Add-vector-ISA-support/20200910-163426
git checkout 1db9feafad65555b15f06c15f969b2b54d0324bb
vim +88 arch/riscv/kernel/kernel_mode_vector.c

9bc3e08158278c Greentime Hu 2020-09-10  83  
9bc3e08158278c Greentime Hu 2020-09-10  84  static void vector_flush_cpu_state(void)
9bc3e08158278c Greentime Hu 2020-09-10  85  {
9bc3e08158278c Greentime Hu 2020-09-10  86  	long tmp;
9bc3e08158278c Greentime Hu 2020-09-10  87  
9bc3e08158278c Greentime Hu 2020-09-10 @88  	__asm__ __volatile__ (
1db9feafad6555 Greentime Hu 2020-09-10  89  		"vsetvli %0, x0, e8, m8\n"
9bc3e08158278c Greentime Hu 2020-09-10  90  		"vmv.v.i v0, 0\n"
9bc3e08158278c Greentime Hu 2020-09-10  91  		"vmv.v.i v8, 0\n"
9bc3e08158278c Greentime Hu 2020-09-10  92  		"vmv.v.i v16, 0\n"
1db9feafad6555 Greentime Hu 2020-09-10  93  		"vmv.v.i v24, 0\n":"=r"(tmp)::);
9bc3e08158278c Greentime Hu 2020-09-10  94  }
9bc3e08158278c Greentime Hu 2020-09-10  95  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org