tree: https://github.com/ammarfaizi2/linux-block palmer/linux/riscv-pmu head: 33363c336516e4beb9dd7e8265b369ff96d07dcb commit: 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 [13/15] RISC-V: Add sscofpmf extension support config: riscv-randconfig-r042-20220320 (https://download.01.org/0day-ci/archive/20220322/202203221658.OweUGgeC-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 85e9b2687a13d1908aa86d1b89c5ce398a06cd39) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/ammarfaizi2/linux-block/commit/4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block palmer/linux/riscv-pmu git checkout 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/perf/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): drivers/perf/riscv_pmu_sbi.c:42: warning: cannot understand function prototype: 'union sbi_pmu_ctr_info *pmu_ctr_list; ' >> drivers/perf/riscv_pmu_sbi.c:498: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst * This function starts all the used counters in two step approach. vim +498 drivers/perf/riscv_pmu_sbi.c 496 497 /** > 498 * This function starts all the used counters in two step approach. 499 * Any counter that did not overflow can be start in a single step 500 * while the overflowed counters need to be started with updated initialization 501 * value. 502 */ 503 static inline void pmu_sbi_start_overflow_mask(struct riscv_pmu *pmu, 504 unsigned long ctr_ovf_mask) 505 { 506 int idx = 0; 507 struct cpu_hw_events *cpu_hw_evt = this_cpu_ptr(pmu->hw_events); 508 struct perf_event *event; 509 unsigned long flag = SBI_PMU_START_FLAG_SET_INIT_VALUE; 510 unsigned long ctr_start_mask = 0; 511 uint64_t max_period; 512 struct hw_perf_event *hwc; 513 u64 init_val = 0; 514 515 ctr_start_mask = cpu_hw_evt->used_hw_ctrs[0] & ~ctr_ovf_mask; 516 517 /* Start all the counters that did not overflow in a single shot */ 518 sbi_ecall(SBI_EXT_PMU, SBI_EXT_PMU_COUNTER_START, 0, ctr_start_mask, 519 0, 0, 0, 0); 520 521 /* Reinitialize and start all the counter that overflowed */ 522 while (ctr_ovf_mask) { 523 if (ctr_ovf_mask & 0x01) { 524 event = cpu_hw_evt->events[idx]; 525 hwc = &event->hw; 526 max_period = riscv_pmu_ctr_get_width_mask(event); 527 init_val = local64_read(&hwc->prev_count) & max_period; 528 sbi_ecall(SBI_EXT_PMU, SBI_EXT_PMU_COUNTER_START, idx, 1, 529 flag, init_val, 0, 0); 530 } 531 ctr_ovf_mask = ctr_ovf_mask >> 1; 532 idx++; 533 } 534 } 535 -- 0-DAY CI Kernel Test Service https://01.org/lkp
