Hi Robin, kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master] [also build test WARNING on v6.17-rc1 next-20250814] [cannot apply to perf-tools-next/perf-tools-next tip/perf/core perf-tools/perf-tools acme/perf/core] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Robin-Murphy/perf-arm-cmn-Fix-event-validation/20250814-010626 base: linus/master patch link: https://lore.kernel.org/r/b05607c3ce0d3ce52de1784823ef9f6de324283c.1755096883.git.robin.murphy%40arm.com patch subject: [PATCH 13/19] perf: Add helper for checking grouped events config: i386-randconfig-003-20250814 (https://download.01.org/0day-ci/archive/20250814/202508141353.jzwhsryp-...@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250814/202508141353.jzwhsryp-...@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202508141353.jzwhsryp-...@intel.com/ All warnings (new ones prefixed by >>): >> arch/x86/events/amd/ibs.c:264:6: warning: unused variable 'ret' >> [-Wunused-variable] 264 | int ret; | ^~~ 1 warning generated. vim +/ret +264 arch/x86/events/amd/ibs.c d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 258 b716916679e720 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-09-21 259 static int perf_ibs_init(struct perf_event *event) b716916679e720 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-09-21 260 { 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 261 struct hw_perf_event *hwc = &event->hw; 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 262 struct perf_ibs *perf_ibs; 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 263 u64 config; 7c2128235eff99 arch/x86/events/amd/ibs.c Ravi Bangoria 2023-06-20 @264 int ret; 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 265 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 266 perf_ibs = get_ibs_pmu(event->attr.type); 2fad201fe38ff9 arch/x86/events/amd/ibs.c Ravi Bangoria 2023-05-04 267 if (!perf_ibs) 2fad201fe38ff9 arch/x86/events/amd/ibs.c Ravi Bangoria 2023-05-04 268 return -ENOENT; 2fad201fe38ff9 arch/x86/events/amd/ibs.c Ravi Bangoria 2023-05-04 269 450bbd493d436f arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-03-12 270 config = event->attr.config; 450bbd493d436f arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-03-12 271 450bbd493d436f arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-03-12 272 if (event->pmu != &perf_ibs->pmu) b716916679e720 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-09-21 273 return -ENOENT; 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 274 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 275 if (config & ~perf_ibs->config_mask) 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 276 return -EINVAL; 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 277 0f9e0d7928d8e8 arch/x86/events/amd/ibs.c Namhyung Kim 2023-11-30 278 if (has_branch_stack(event)) 0f9e0d7928d8e8 arch/x86/events/amd/ibs.c Namhyung Kim 2023-11-30 279 return -EOPNOTSUPP; 0f9e0d7928d8e8 arch/x86/events/amd/ibs.c Namhyung Kim 2023-11-30 280 d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 281 /* handle exclude_{user,kernel} in the IRQ handler */ d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 282 if (event->attr.exclude_host || event->attr.exclude_guest || d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 283 event->attr.exclude_idle) d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 284 return -EINVAL; d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 285 d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 286 if (!(event->attr.config2 & IBS_SW_FILTER_MASK) && d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 287 (event->attr.exclude_kernel || event->attr.exclude_user || d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 288 event->attr.exclude_hv)) d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 289 return -EINVAL; d29e744c71673a arch/x86/events/amd/ibs.c Namhyung Kim 2024-12-03 290 ccec93f5de464b arch/x86/events/amd/ibs.c Robin Murphy 2025-08-13 291 /* ccec93f5de464b arch/x86/events/amd/ibs.c Robin Murphy 2025-08-13 292 * Grouping of IBS events is not possible since IBS can have only ccec93f5de464b arch/x86/events/amd/ibs.c Robin Murphy 2025-08-13 293 * one event active at any point in time. ccec93f5de464b arch/x86/events/amd/ibs.c Robin Murphy 2025-08-13 294 */ ccec93f5de464b arch/x86/events/amd/ibs.c Robin Murphy 2025-08-13 295 if (in_hardware_group(event)) ccec93f5de464b arch/x86/events/amd/ibs.c Robin Murphy 2025-08-13 296 return -EINVAL; 7c2128235eff99 arch/x86/events/amd/ibs.c Ravi Bangoria 2023-06-20 297 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 298 if (hwc->sample_period) { 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 299 if (config & perf_ibs->cnt_mask) 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 300 /* raw max_cnt may not be set */ 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 301 return -EINVAL; 88c7bcad71c83f arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 302 b2fc7b282bf7c1 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 303 if (event->attr.freq) { b2fc7b282bf7c1 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 304 hwc->sample_period = perf_ibs->min_period; b2fc7b282bf7c1 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 305 } else { 88c7bcad71c83f arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 306 /* Silently mask off lower nibble. IBS hw mandates it. */ 6accb9cf760804 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-04-02 307 hwc->sample_period &= ~0x0FULL; b2fc7b282bf7c1 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 308 if (hwc->sample_period < perf_ibs->min_period) b2fc7b282bf7c1 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 309 return -EINVAL; b2fc7b282bf7c1 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 310 } 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 311 } else { 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 312 u64 period = 0; 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 313 e1e7844ced88f9 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 314 if (event->attr.freq) e1e7844ced88f9 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 315 return -EINVAL; e1e7844ced88f9 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 316 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 317 if (perf_ibs == &perf_ibs_op) { 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 318 period = (config & IBS_OP_MAX_CNT) << 4; 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 319 if (ibs_caps & IBS_CAPS_OPCNTEXT) 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 320 period |= config & IBS_OP_MAX_CNT_EXT_MASK; 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 321 } else { 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 322 period = (config & IBS_FETCH_MAX_CNT) << 4; 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 323 } 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 324 db98c5faf8cb35 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 325 config &= ~perf_ibs->cnt_mask; 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 326 event->attr.sample_period = period; 598bdf4fefff5a arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 327 hwc->sample_period = period; 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 328 b2fc7b282bf7c1 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-01-15 329 if (hwc->sample_period < perf_ibs->min_period) 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 330 return -EINVAL; 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 331 } 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 332 d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 333 if (perf_ibs_ldlat_event(perf_ibs, event)) { d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 334 u64 ldlat = event->attr.config1 & 0xFFF; d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 335 d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 336 if (ldlat < 128 || ldlat > 2048) 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 337 return -EINVAL; d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 338 ldlat >>= 7; d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 339 d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 340 config |= (ldlat - 1) << 59; d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 341 config |= IBS_OP_L3MISSONLY | IBS_OP_LDLAT_EN; d20610c19b4a22 arch/x86/events/amd/ibs.c Ravi Bangoria 2025-02-05 342 } 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 343 6accb9cf760804 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-04-02 344 /* 6accb9cf760804 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-04-02 345 * If we modify hwc->sample_period, we also need to update 6accb9cf760804 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-04-02 346 * hwc->last_period and hwc->period_left. 6accb9cf760804 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-04-02 347 */ 6accb9cf760804 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-04-02 348 hwc->last_period = hwc->sample_period; 6accb9cf760804 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-04-02 349 local64_set(&hwc->period_left, hwc->sample_period); 6accb9cf760804 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2012-04-02 350 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 351 hwc->config_base = perf_ibs->msr; 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 352 hwc->config = config; 510419435c6948 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-12-15 353 b716916679e720 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-09-21 354 return 0; b716916679e720 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-09-21 355 } b716916679e720 arch/x86/kernel/cpu/perf_event_amd_ibs.c Robert Richter 2011-09-21 356 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
