Hi Leo, I love your patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.16-rc5] [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/Leo-Yan/coresight-etm-Correct-PI... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 2585cf9dfaaddf00b069673f27bb3f8530e2039c config: arm64-randconfig-r034-20211213 (https://download.01.org/0day-ci/archive/20211214/202112140527.RSkgSFCc-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project b6a2ddb6c8ac29412b1361810972e15221fa021c) 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 arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/0day-ci/linux/commit/dd716cd12b2f0e47fcc2b0e3e9172e4e7... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Leo-Yan/coresight-etm-Correct-PID-tracing-for-non-root-namespace/20211213-201632 git checkout dd716cd12b2f0e47fcc2b0e3e9172e4e70ad4877 # 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=arm64 SHELL=/bin/bash drivers/hwtracing/coresight/ 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 >>): task_is_in_init_pid_ns(current)) ^ 1 error generated. vim +/task_is_in_init_pid_ns +661 drivers/hwtracing/coresight/coresight-etm4x-core.c 606 607 static int etm4_parse_event_config(struct coresight_device *csdev, 608 struct perf_event *event) 609 { 610 int ret = 0; 611 struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); 612 struct etmv4_config *config = &drvdata->config; 613 struct perf_event_attr *attr = &event->attr; 614 unsigned long cfg_hash; 615 int preset; 616 617 /* Clear configuration from previous run */ 618 memset(config, 0, sizeof(struct etmv4_config)); 619 620 if (attr->exclude_kernel) 621 config->mode = ETM_MODE_EXCL_KERN; 622 623 if (attr->exclude_user) 624 config->mode = ETM_MODE_EXCL_USER; 625 626 /* Always start from the default config */ 627 etm4_set_default_config(config); 628 629 /* Configure filters specified on the perf cmd line, if any. */ 630 ret = etm4_set_event_filters(drvdata, event); 631 if (ret) 632 goto out; 633 634 /* Go from generic option to ETMv4 specifics */ 635 if (attr->config & BIT(ETM_OPT_CYCACC)) { 636 config->cfg |= BIT(4); 637 /* TRM: Must program this for cycacc to work */ 638 config->ccctlr = ETM_CYC_THRESHOLD_DEFAULT; 639 } 640 if (attr->config & BIT(ETM_OPT_TS)) { 641 /* 642 * Configure timestamps to be emitted at regular intervals in 643 * order to correlate instructions executed on different CPUs 644 * (CPU-wide trace scenarios). 645 */ 646 ret = etm4_config_timestamp_event(drvdata); 647 648 /* 649 * No need to go further if timestamp intervals can't 650 * be configured. 651 */ 652 if (ret) 653 goto out; 654 655 /* bit[11], Global timestamp tracing bit */ 656 config->cfg |= BIT(11); 657 } 658 659 /* Only trace contextID when runs in root PID namespace */ 660 if ((attr->config & BIT(ETM_OPT_CTXTID)) && 662 /* bit[6], Context ID tracing bit */ 663 config->cfg |= BIT(ETM4_CFG_BIT_CTXTID); 664 665 /* 666 * If set bit ETM_OPT_CTXTID2 in perf config, this asks to trace VMID 667 * for recording CONTEXTIDR_EL2. Do not enable VMID tracing if the 668 * kernel is not running in EL2. 669 */ 670 if (attr->config & BIT(ETM_OPT_CTXTID2)) { 671 if (!is_kernel_in_hyp_mode()) { 672 ret = -EINVAL; 673 goto out; 674 } 675 676 /* Only trace virtual contextID when runs in root PID namespace */ 677 if (task_is_in_init_pid_ns(current)) 678 config->cfg |= BIT(ETM4_CFG_BIT_VMID) | 679 BIT(ETM4_CFG_BIT_VMID_OPT); 680 } 681 682 /* return stack - enable if selected and supported */ 683 if ((attr->config & BIT(ETM_OPT_RETSTK)) && drvdata->retstack) 684 /* bit[12], Return stack enable bit */ 685 config->cfg |= BIT(12); 686 687 /* 688 * Set any selected configuration and preset. 689 * 690 * This extracts the values of PMU_FORMAT_ATTR(configid) and PMU_FORMAT_ATTR(preset) 691 * in the perf attributes defined in coresight-etm-perf.c. 692 * configid uses bits 63:32 of attr->config2, preset uses bits 3:0 of attr->config. 693 * A zero configid means no configuration active, preset = 0 means no preset selected. 694 */ 695 if (attr->config2 & GENMASK_ULL(63, 32)) { 696 cfg_hash = (u32)(attr->config2 >> 32); 697 preset = attr->config & 0xF; 698 ret = cscfg_csdev_enable_active_config(csdev, cfg_hash, preset); 699 } 700 701 out: 702 return ret; 703 } 704 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org