linux-kernel - [nbdd0121:riscv 1/4] arch/riscv/kernel/head.S:232: Error: unrecognized opcode `csrw, CSR

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Message-ID: <202112181138.GXFKRI6J-lkp@intel.com>
Date:   Sat, 18 Dec 2021 11:52:46 +0800
From:   kernel test robot <lkp@...el.com>
To:     Gary Guo <gary@...yguo.net>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [nbdd0121:riscv 1/4] arch/riscv/kernel/head.S:232: Error:
 unrecognized opcode `csrw, CSR_MCOUNTEREN,2'

tree:   https://github.com/nbdd0121/linux riscv
head:   696be59be32488c7c2417cd633008c2162f89fa8
commit: 4481ee1b02354fde9960268a3fd8d638124aba1a [1/4] riscv: enable TIME CSR in U mode
config: riscv-nommu_k210_defconfig (https://download.01.org/0day-ci/archive/20211218/202112181138.GXFKRI6J-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 11.2.0
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
        # https://github.com/nbdd0121/linux/commit/4481ee1b02354fde9960268a3fd8d638124aba1a
        git remote add nbdd0121 https://github.com/nbdd0121/linux
        git fetch --no-tags nbdd0121 riscv
        git checkout 4481ee1b02354fde9960268a3fd8d638124aba1a
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/

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

All errors (new ones prefixed by >>):

   arch/riscv/kernel/head.S: Assembler messages:
>> arch/riscv/kernel/head.S:232: Error: unrecognized opcode `csrw, CSR_MCOUNTEREN,2'


vim +232 arch/riscv/kernel/head.S

   203	
   204	ENTRY(_start_kernel)
   205		/* Mask all interrupts */
   206		csrw CSR_IE, zero
   207		csrw CSR_IP, zero
   208	
   209	#ifdef CONFIG_RISCV_M_MODE
   210		/* flush the instruction cache */
   211		fence.i
   212	
   213		/* Reset all registers except ra, a0, a1 */
   214		call reset_regs
   215	
   216		/*
   217		 * Setup a PMP to permit access to all of memory.  Some machines may
   218		 * not implement PMPs, so we set up a quick trap handler to just skip
   219		 * touching the PMPs on any trap.
   220		 */
   221		la a0, pmp_done
   222		csrw CSR_TVEC, a0
   223	
   224		li a0, -1
   225		csrw CSR_PMPADDR0, a0
   226		li a0, (PMP_A_NAPOT | PMP_R | PMP_W | PMP_X)
   227		csrw CSR_PMPCFG0, a0
   228	.align 2
   229	pmp_done:
   230	
   231		/* Allow user-mode to access time CSR */
 > 232		csrw, CSR_MCOUNTEREN, 2
   233	
   234		/*
   235		 * The hartid in a0 is expected later on, and we have no firmware
   236		 * to hand it to us.
   237		 */
   238		csrr a0, CSR_MHARTID
   239	#endif /* CONFIG_RISCV_M_MODE */
   240	
   241		/* Allow user-mode to access time CSR */
   242		csrw CSR_SCOUNTEREN, 2
   243	
   244		/* Load the global pointer */
   245	.option push
   246	.option norelax
   247		la gp, __global_pointer$
   248	.option pop
   249	
   250		/*
   251		 * Disable FPU to detect illegal usage of
   252		 * floating point in kernel space
   253		 */
   254		li t0, SR_FS
   255		csrc CSR_STATUS, t0
   256	

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