tree: https://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git for-next head: 929f6a183839a4c4aabb38a61e02fe32239e6b59 commit: 95ce6c73da3b909d27181df5ab47bb0d901e5698 [10/13] riscv: Enable context tracking config: riscv-randconfig-r015-20200712 (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 git checkout 95ce6c73da3b909d27181df5ab47bb0d901e5698 # 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(a)intel.com&gt; All errors (new ones prefixed by >>): arch/riscv/kernel/entry.S: Assembler messages: vim +106 arch/riscv/kernel/entry.S 103 104 #ifdef CONFIG_CONTEXT_TRACKING 105 /* If previous state is in user mode, call context_tracking_user_exit. */ 107 bnez a0, skip_context_tracking 108 call context_tracking_user_exit 109 skip_context_tracking: 110 #endif 111 112 /* 113 * MSB of cause differentiates between 114 * interrupts and exceptions 115 */ 116 bge s4, zero, 1f 117 118 la ra, ret_from_exception 119 120 /* Handle interrupts */ 121 move a0, sp /* pt_regs */ 122 la a1, handle_arch_irq 123 REG_L a1, (a1) 124 jr a1 125 1: 126 #ifdef CONFIG_TRACE_IRQFLAGS 127 call trace_hardirqs_on 128 #endif 129 /* 130 * Exceptions run with interrupts enabled or disabled depending on the 131 * state of SR_PIE in m/sstatus. 132 */ 133 andi t0, s1, SR_PIE 134 beqz t0, 1f 135 csrs CSR_STATUS, SR_IE 136 137 1: 138 la ra, ret_from_exception 139 /* Handle syscalls */ 140 li t0, EXC_SYSCALL 141 beq s4, t0, handle_syscall 142 143 /* Handle other exceptions */ 144 slli t0, s4, RISCV_LGPTR 145 la t1, excp_vect_table 146 la t2, excp_vect_table_end 147 move a0, sp /* pt_regs */ 148 add t0, t1, t0 149 /* Check if exception code lies within bounds */ 150 bgeu t0, t2, 1f 151 REG_L t0, 0(t0) 152 jr t0 153 1: 154 tail do_trap_unknown 155 156 handle_syscall: 157 #if defined(CONFIG_TRACE_IRQFLAGS) || defined(CONFIG_CONTEXT_TRACKING) 158 /* Recover a0 - a7 for system calls */ 159 REG_L a0, PT_A0(sp) 160 REG_L a1, PT_A1(sp) 161 REG_L a2, PT_A2(sp) 162 REG_L a3, PT_A3(sp) 163 REG_L a4, PT_A4(sp) 164 REG_L a5, PT_A5(sp) 165 REG_L a6, PT_A6(sp) 166 REG_L a7, PT_A7(sp) 167 #endif 168 /* save the initial A0 value (needed in signal handlers) */ 169 REG_S a0, PT_ORIG_A0(sp) 170 /* 171 * Advance SEPC to avoid executing the original 172 * scall instruction on sret 173 */ 174 addi s2, s2, 0x4 175 REG_S s2, PT_EPC(sp) 176 /* Trace syscalls, but only if requested by the user. */ 177 REG_L t0, TASK_TI_FLAGS(tp) 178 andi t0, t0, _TIF_SYSCALL_WORK 179 bnez t0, handle_syscall_trace_enter 180 check_syscall_nr: 181 /* Check to make sure we don't jump to a bogus syscall number. */ 182 li t0, __NR_syscalls 183 la s0, sys_ni_syscall 184 /* 185 * Syscall number held in a7. 186 * If syscall number is above allowed value, redirect to ni_syscall. 187 */ 188 bge a7, t0, 1f 189 /* 190 * Check if syscall is rejected by tracer, i.e., a7 == -1. 191 * If yes, we pretend it was executed. 192 */ 193 li t1, -1 194 beq a7, t1, ret_from_syscall_rejected 195 blt a7, t1, 1f 196 /* Call syscall */ 197 la s0, sys_call_table 198 slli t0, a7, RISCV_LGPTR 199 add s0, s0, t0 200 REG_L s0, 0(s0) 201 1: 202 jalr s0 203 204 ret_from_syscall: 205 /* Set user a0 to kernel a0 */ 206 REG_S a0, PT_A0(sp) 207 /* 208 * We didn't execute the actual syscall. 209 * Seccomp already set return value for the current task pt_regs. 210 * (If it was configured with SECCOMP_RET_ERRNO/TRACE) 211 */ 212 ret_from_syscall_rejected: 213 /* Trace syscalls, but only if requested by the user. */ 214 REG_L t0, TASK_TI_FLAGS(tp) 215 andi t0, t0, _TIF_SYSCALL_WORK 216 bnez t0, handle_syscall_trace_exit 217 218 ret_from_exception: 219 REG_L s0, PT_STATUS(sp) 220 csrc CSR_STATUS, SR_IE 221 #ifdef CONFIG_TRACE_IRQFLAGS 222 call trace_hardirqs_off 223 #endif 224 #ifdef CONFIG_RISCV_M_MODE 225 /* the MPP value is too large to be used as an immediate arg for addi */ 226 li t0, SR_MPP 227 and s0, s0, t0 228 #else 229 andi s0, s0, SR_SPP 230 #endif 231 bnez s0, resume_kernel 232 233 resume_userspace: 234 /* Interrupts must be disabled here so flags are checked atomically */ 235 REG_L s0, TASK_TI_FLAGS(tp) /* current_thread_info->flags */ 236 andi s1, s0, _TIF_WORK_MASK 237 bnez s1, work_pending 238 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org