[openeuler:OLK-5.10 3278/3278] arch/x86/events/intel/core.c:6765:7: warning: variable 'name' is used uninitialized whenever switch case is taken
tree: https://gitee.com/openeuler/kernel.git OLK-5.10 head: f7d17f5d9c13869cef204e25f552fbac501824dc commit: 6f5c7e20d8ef1bffa7b1ed906689e5a2e52e7dd2 [3278/3278] perf/x86/intel: Add common intel_pmu_init_hybrid() config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20251110/202511102332.qUTQH99w-lkp@i...) 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/20251110/202511102332.qUTQH99w-lkp@i...) 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 <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511102332.qUTQH99w-lkp@intel.com/ All warnings (new ones prefixed by >>):
arch/x86/events/intel/core.c:6765:7: warning: variable 'name' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized] 6765 | case INTEL_FAM6_METEORLAKE: | ^~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/intel-family.h:120:32: note: expanded from macro 'INTEL_FAM6_METEORLAKE' 120 | #define INTEL_FAM6_METEORLAKE 0xAC | ^~~~ arch/x86/events/intel/core.c:6819:53: note: uninitialized use occurs here 6819 | snprintf(pmu_name_str, sizeof(pmu_name_str), "%s", name); | ^~~~ arch/x86/events/intel/core.c:6766:7: warning: variable 'name' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized] 6766 | case INTEL_FAM6_METEORLAKE_L: | ^~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/intel-family.h:121:34: note: expanded from macro 'INTEL_FAM6_METEORLAKE_L' 121 | #define INTEL_FAM6_METEORLAKE_L 0xAA | ^~~~ arch/x86/events/intel/core.c:6819:53: note: uninitialized use occurs here 6819 | snprintf(pmu_name_str, sizeof(pmu_name_str), "%s", name); | ^~~~ arch/x86/events/intel/core.c:6083:12: note: initialize the variable 'name' to silence this warning 6083 | char *name; | ^ | = NULL 2 warnings generated.
vim +/name +6765 arch/x86/events/intel/core.c 6069 6070 __init int intel_pmu_init(void) 6071 { 6072 struct attribute **extra_skl_attr = &empty_attrs; 6073 struct attribute **extra_attr = &empty_attrs; 6074 struct attribute **td_attr = &empty_attrs; 6075 struct attribute **mem_attr = &empty_attrs; 6076 struct attribute **tsx_attr = &empty_attrs; 6077 union cpuid10_edx edx; 6078 union cpuid10_eax eax; 6079 union cpuid10_ebx ebx; 6080 unsigned int fixed_mask; 6081 bool pmem = false; 6082 int version, i; 6083 char *name; 6084 struct x86_hybrid_pmu *pmu; 6085 6086 if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) { 6087 switch (boot_cpu_data.x86) { 6088 case 0x6: 6089 return p6_pmu_init(); 6090 case 0xb: 6091 return knc_pmu_init(); 6092 case 0xf: 6093 return p4_pmu_init(); 6094 } 6095 return -ENODEV; 6096 } 6097 6098 /* 6099 * Check whether the Architectural PerfMon supports 6100 * Branch Misses Retired hw_event or not. 6101 */ 6102 cpuid(10, &eax.full, &ebx.full, &fixed_mask, &edx.full); 6103 if (eax.split.mask_length < ARCH_PERFMON_EVENTS_COUNT) 6104 return -ENODEV; 6105 6106 version = eax.split.version_id; 6107 if (version < 2) 6108 x86_pmu = core_pmu; 6109 else 6110 x86_pmu = intel_pmu; 6111 6112 x86_pmu.version = version; 6113 x86_pmu.num_counters = eax.split.num_counters; 6114 x86_pmu.cntval_bits = eax.split.bit_width; 6115 x86_pmu.cntval_mask = (1ULL << eax.split.bit_width) - 1; 6116 6117 x86_pmu.events_maskl = ebx.full; 6118 x86_pmu.events_mask_len = eax.split.mask_length; 6119 6120 x86_pmu.max_pebs_events = min_t(unsigned, MAX_PEBS_EVENTS, x86_pmu.num_counters); 6121 6122 /* 6123 * Quirk: v2 perfmon does not report fixed-purpose events, so 6124 * assume at least 3 events, when not running in a hypervisor: 6125 */ 6126 if (version > 1 && version < 5) { 6127 int assume = 3 * !boot_cpu_has(X86_FEATURE_HYPERVISOR); 6128 6129 x86_pmu.num_counters_fixed = 6130 max((int)edx.split.num_counters_fixed, assume); 6131 6132 fixed_mask = (1L << x86_pmu.num_counters_fixed) - 1; 6133 } else if (version >= 5) 6134 x86_pmu.num_counters_fixed = fls(fixed_mask); 6135 6136 if (version >= 4) 6137 x86_pmu.counter_freezing = !disable_counter_freezing; 6138 6139 if (boot_cpu_has(X86_FEATURE_PDCM)) { 6140 u64 capabilities; 6141 6142 rdmsrl(MSR_IA32_PERF_CAPABILITIES, capabilities); 6143 x86_pmu.intel_cap.capabilities = capabilities; 6144 } 6145 6146 if (x86_pmu.intel_cap.lbr_format == LBR_FORMAT_32) { 6147 x86_pmu.lbr_reset = intel_pmu_lbr_reset_32; 6148 x86_pmu.lbr_read = intel_pmu_lbr_read_32; 6149 } 6150 6151 if (boot_cpu_has(X86_FEATURE_ARCH_LBR)) 6152 intel_pmu_arch_lbr_init(); 6153 6154 intel_ds_init(); 6155 6156 x86_add_quirk(intel_arch_events_quirk); /* Install first, so it runs last */ 6157 6158 if (version >= 5) { 6159 x86_pmu.intel_cap.anythread_deprecated = edx.split.anythread_deprecated; 6160 if (x86_pmu.intel_cap.anythread_deprecated) 6161 pr_cont(" AnyThread deprecated, "); 6162 } 6163 6164 /* 6165 * Install the hw-cache-events table: 6166 */ 6167 switch (boot_cpu_data.x86_model) { 6168 case INTEL_FAM6_CORE_YONAH: 6169 pr_cont("Core events, "); 6170 name = "core"; 6171 break; 6172 6173 case INTEL_FAM6_CORE2_MEROM: 6174 x86_add_quirk(intel_clovertown_quirk); 6175 fallthrough; 6176 6177 case INTEL_FAM6_CORE2_MEROM_L: 6178 case INTEL_FAM6_CORE2_PENRYN: 6179 case INTEL_FAM6_CORE2_DUNNINGTON: 6180 memcpy(hw_cache_event_ids, core2_hw_cache_event_ids, 6181 sizeof(hw_cache_event_ids)); 6182 6183 intel_pmu_lbr_init_core(); 6184 6185 x86_pmu.event_constraints = intel_core2_event_constraints; 6186 x86_pmu.pebs_constraints = intel_core2_pebs_event_constraints; 6187 pr_cont("Core2 events, "); 6188 name = "core2"; 6189 break; 6190 6191 case INTEL_FAM6_NEHALEM: 6192 case INTEL_FAM6_NEHALEM_EP: 6193 case INTEL_FAM6_NEHALEM_EX: 6194 memcpy(hw_cache_event_ids, nehalem_hw_cache_event_ids, 6195 sizeof(hw_cache_event_ids)); 6196 memcpy(hw_cache_extra_regs, nehalem_hw_cache_extra_regs, 6197 sizeof(hw_cache_extra_regs)); 6198 6199 intel_pmu_lbr_init_nhm(); 6200 6201 x86_pmu.event_constraints = intel_nehalem_event_constraints; 6202 x86_pmu.pebs_constraints = intel_nehalem_pebs_event_constraints; 6203 x86_pmu.enable_all = intel_pmu_nhm_enable_all; 6204 x86_pmu.extra_regs = intel_nehalem_extra_regs; 6205 x86_pmu.limit_period = nhm_limit_period; 6206 6207 mem_attr = nhm_mem_events_attrs; 6208 6209 /* UOPS_ISSUED.STALLED_CYCLES */ 6210 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 6211 X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1); 6212 /* UOPS_EXECUTED.CORE_ACTIVE_CYCLES,c=1,i=1 */ 6213 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = 6214 X86_CONFIG(.event=0xb1, .umask=0x3f, .inv=1, .cmask=1); 6215 6216 intel_pmu_pebs_data_source_nhm(); 6217 x86_add_quirk(intel_nehalem_quirk); 6218 x86_pmu.pebs_no_tlb = 1; 6219 extra_attr = nhm_format_attr; 6220 6221 pr_cont("Nehalem events, "); 6222 name = "nehalem"; 6223 break; 6224 6225 case INTEL_FAM6_ATOM_BONNELL: 6226 case INTEL_FAM6_ATOM_BONNELL_MID: 6227 case INTEL_FAM6_ATOM_SALTWELL: 6228 case INTEL_FAM6_ATOM_SALTWELL_MID: 6229 case INTEL_FAM6_ATOM_SALTWELL_TABLET: 6230 memcpy(hw_cache_event_ids, atom_hw_cache_event_ids, 6231 sizeof(hw_cache_event_ids)); 6232 6233 intel_pmu_lbr_init_atom(); 6234 6235 x86_pmu.event_constraints = intel_gen_event_constraints; 6236 x86_pmu.pebs_constraints = intel_atom_pebs_event_constraints; 6237 x86_pmu.pebs_aliases = intel_pebs_aliases_core2; 6238 pr_cont("Atom events, "); 6239 name = "bonnell"; 6240 break; 6241 6242 case INTEL_FAM6_ATOM_SILVERMONT: 6243 case INTEL_FAM6_ATOM_SILVERMONT_D: 6244 case INTEL_FAM6_ATOM_SILVERMONT_MID: 6245 case INTEL_FAM6_ATOM_AIRMONT: 6246 case INTEL_FAM6_ATOM_AIRMONT_MID: 6247 memcpy(hw_cache_event_ids, slm_hw_cache_event_ids, 6248 sizeof(hw_cache_event_ids)); 6249 memcpy(hw_cache_extra_regs, slm_hw_cache_extra_regs, 6250 sizeof(hw_cache_extra_regs)); 6251 6252 intel_pmu_lbr_init_slm(); 6253 6254 x86_pmu.event_constraints = intel_slm_event_constraints; 6255 x86_pmu.pebs_constraints = intel_slm_pebs_event_constraints; 6256 x86_pmu.extra_regs = intel_slm_extra_regs; 6257 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6258 td_attr = slm_events_attrs; 6259 extra_attr = slm_format_attr; 6260 pr_cont("Silvermont events, "); 6261 name = "silvermont"; 6262 break; 6263 6264 case INTEL_FAM6_ATOM_GOLDMONT: 6265 case INTEL_FAM6_ATOM_GOLDMONT_D: 6266 x86_add_quirk(intel_counter_freezing_quirk); 6267 memcpy(hw_cache_event_ids, glm_hw_cache_event_ids, 6268 sizeof(hw_cache_event_ids)); 6269 memcpy(hw_cache_extra_regs, glm_hw_cache_extra_regs, 6270 sizeof(hw_cache_extra_regs)); 6271 6272 intel_pmu_lbr_init_skl(); 6273 6274 x86_pmu.event_constraints = intel_slm_event_constraints; 6275 x86_pmu.pebs_constraints = intel_glm_pebs_event_constraints; 6276 x86_pmu.extra_regs = intel_glm_extra_regs; 6277 /* 6278 * It's recommended to use CPU_CLK_UNHALTED.CORE_P + NPEBS 6279 * for precise cycles. 6280 * :pp is identical to :ppp 6281 */ 6282 x86_pmu.pebs_aliases = NULL; 6283 x86_pmu.pebs_prec_dist = true; 6284 x86_pmu.lbr_pt_coexist = true; 6285 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6286 td_attr = glm_events_attrs; 6287 extra_attr = slm_format_attr; 6288 pr_cont("Goldmont events, "); 6289 name = "goldmont"; 6290 break; 6291 6292 case INTEL_FAM6_ATOM_GOLDMONT_PLUS: 6293 x86_add_quirk(intel_counter_freezing_quirk); 6294 memcpy(hw_cache_event_ids, glp_hw_cache_event_ids, 6295 sizeof(hw_cache_event_ids)); 6296 memcpy(hw_cache_extra_regs, glp_hw_cache_extra_regs, 6297 sizeof(hw_cache_extra_regs)); 6298 6299 intel_pmu_lbr_init_skl(); 6300 6301 x86_pmu.event_constraints = intel_slm_event_constraints; 6302 x86_pmu.extra_regs = intel_glm_extra_regs; 6303 /* 6304 * It's recommended to use CPU_CLK_UNHALTED.CORE_P + NPEBS 6305 * for precise cycles. 6306 */ 6307 x86_pmu.pebs_aliases = NULL; 6308 x86_pmu.pebs_prec_dist = true; 6309 x86_pmu.lbr_pt_coexist = true; 6310 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6311 x86_pmu.flags |= PMU_FL_PEBS_ALL; 6312 x86_pmu.get_event_constraints = glp_get_event_constraints; 6313 td_attr = glm_events_attrs; 6314 /* Goldmont Plus has 4-wide pipeline */ 6315 event_attr_td_total_slots_scale_glm.event_str = "4"; 6316 extra_attr = slm_format_attr; 6317 pr_cont("Goldmont plus events, "); 6318 name = "goldmont_plus"; 6319 break; 6320 6321 case INTEL_FAM6_ATOM_TREMONT_D: 6322 case INTEL_FAM6_ATOM_TREMONT: 6323 case INTEL_FAM6_ATOM_TREMONT_L: 6324 x86_pmu.late_ack = true; 6325 memcpy(hw_cache_event_ids, glp_hw_cache_event_ids, 6326 sizeof(hw_cache_event_ids)); 6327 memcpy(hw_cache_extra_regs, tnt_hw_cache_extra_regs, 6328 sizeof(hw_cache_extra_regs)); 6329 hw_cache_event_ids[C(ITLB)][C(OP_READ)][C(RESULT_ACCESS)] = -1; 6330 6331 intel_pmu_lbr_init_skl(); 6332 6333 x86_pmu.event_constraints = intel_slm_event_constraints; 6334 x86_pmu.extra_regs = intel_tnt_extra_regs; 6335 /* 6336 * It's recommended to use CPU_CLK_UNHALTED.CORE_P + NPEBS 6337 * for precise cycles. 6338 */ 6339 x86_pmu.pebs_aliases = NULL; 6340 x86_pmu.pebs_prec_dist = true; 6341 x86_pmu.lbr_pt_coexist = true; 6342 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6343 x86_pmu.get_event_constraints = tnt_get_event_constraints; 6344 td_attr = tnt_events_attrs; 6345 extra_attr = slm_format_attr; 6346 pr_cont("Tremont events, "); 6347 name = "Tremont"; 6348 break; 6349 6350 case INTEL_FAM6_ATOM_GRACEMONT: 6351 intel_pmu_init_grt(NULL); 6352 intel_pmu_pebs_data_source_grt(); 6353 x86_pmu.pebs_latency_data = adl_latency_data_small; 6354 x86_pmu.get_event_constraints = tnt_get_event_constraints; 6355 td_attr = tnt_events_attrs; 6356 mem_attr = grt_mem_attrs; 6357 extra_attr = nhm_format_attr; 6358 pr_cont("Gracemont events, "); 6359 name = "gracemont"; 6360 break; 6361 6362 case INTEL_FAM6_ATOM_CRESTMONT: 6363 case INTEL_FAM6_ATOM_CRESTMONT_X: 6364 intel_pmu_init_grt(NULL); 6365 x86_pmu.extra_regs = intel_cmt_extra_regs; 6366 intel_pmu_pebs_data_source_cmt(); 6367 x86_pmu.pebs_latency_data = mtl_latency_data_small; 6368 x86_pmu.get_event_constraints = cmt_get_event_constraints; 6369 td_attr = cmt_events_attrs; 6370 mem_attr = grt_mem_attrs; 6371 extra_attr = cmt_format_attr; 6372 pr_cont("Crestmont events, "); 6373 name = "crestmont"; 6374 break; 6375 6376 case INTEL_FAM6_WESTMERE: 6377 case INTEL_FAM6_WESTMERE_EP: 6378 case INTEL_FAM6_WESTMERE_EX: 6379 memcpy(hw_cache_event_ids, westmere_hw_cache_event_ids, 6380 sizeof(hw_cache_event_ids)); 6381 memcpy(hw_cache_extra_regs, nehalem_hw_cache_extra_regs, 6382 sizeof(hw_cache_extra_regs)); 6383 6384 intel_pmu_lbr_init_nhm(); 6385 6386 x86_pmu.event_constraints = intel_westmere_event_constraints; 6387 x86_pmu.enable_all = intel_pmu_nhm_enable_all; 6388 x86_pmu.pebs_constraints = intel_westmere_pebs_event_constraints; 6389 x86_pmu.extra_regs = intel_westmere_extra_regs; 6390 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6391 6392 mem_attr = nhm_mem_events_attrs; 6393 6394 /* UOPS_ISSUED.STALLED_CYCLES */ 6395 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 6396 X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1); 6397 /* UOPS_EXECUTED.CORE_ACTIVE_CYCLES,c=1,i=1 */ 6398 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = 6399 X86_CONFIG(.event=0xb1, .umask=0x3f, .inv=1, .cmask=1); 6400 6401 intel_pmu_pebs_data_source_nhm(); 6402 extra_attr = nhm_format_attr; 6403 pr_cont("Westmere events, "); 6404 name = "westmere"; 6405 break; 6406 6407 case INTEL_FAM6_SANDYBRIDGE: 6408 case INTEL_FAM6_SANDYBRIDGE_X: 6409 x86_add_quirk(intel_sandybridge_quirk); 6410 x86_add_quirk(intel_ht_bug); 6411 memcpy(hw_cache_event_ids, snb_hw_cache_event_ids, 6412 sizeof(hw_cache_event_ids)); 6413 memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs, 6414 sizeof(hw_cache_extra_regs)); 6415 6416 intel_pmu_lbr_init_snb(); 6417 6418 x86_pmu.event_constraints = intel_snb_event_constraints; 6419 x86_pmu.pebs_constraints = intel_snb_pebs_event_constraints; 6420 x86_pmu.pebs_aliases = intel_pebs_aliases_snb; 6421 if (boot_cpu_data.x86_model == INTEL_FAM6_SANDYBRIDGE_X) 6422 x86_pmu.extra_regs = intel_snbep_extra_regs; 6423 else 6424 x86_pmu.extra_regs = intel_snb_extra_regs; 6425 6426 6427 /* all extra regs are per-cpu when HT is on */ 6428 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6429 x86_pmu.flags |= PMU_FL_NO_HT_SHARING; 6430 6431 td_attr = snb_events_attrs; 6432 mem_attr = snb_mem_events_attrs; 6433 6434 /* UOPS_ISSUED.ANY,c=1,i=1 to count stall cycles */ 6435 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 6436 X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1); 6437 /* UOPS_DISPATCHED.THREAD,c=1,i=1 to count stall cycles*/ 6438 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_BACKEND] = 6439 X86_CONFIG(.event=0xb1, .umask=0x01, .inv=1, .cmask=1); 6440 6441 extra_attr = nhm_format_attr; 6442 6443 pr_cont("SandyBridge events, "); 6444 name = "sandybridge"; 6445 break; 6446 6447 case INTEL_FAM6_IVYBRIDGE: 6448 case INTEL_FAM6_IVYBRIDGE_X: 6449 x86_add_quirk(intel_ht_bug); 6450 memcpy(hw_cache_event_ids, snb_hw_cache_event_ids, 6451 sizeof(hw_cache_event_ids)); 6452 /* dTLB-load-misses on IVB is different than SNB */ 6453 hw_cache_event_ids[C(DTLB)][C(OP_READ)][C(RESULT_MISS)] = 0x8108; /* DTLB_LOAD_MISSES.DEMAND_LD_MISS_CAUSES_A_WALK */ 6454 6455 memcpy(hw_cache_extra_regs, snb_hw_cache_extra_regs, 6456 sizeof(hw_cache_extra_regs)); 6457 6458 intel_pmu_lbr_init_snb(); 6459 6460 x86_pmu.event_constraints = intel_ivb_event_constraints; 6461 x86_pmu.pebs_constraints = intel_ivb_pebs_event_constraints; 6462 x86_pmu.pebs_aliases = intel_pebs_aliases_ivb; 6463 x86_pmu.pebs_prec_dist = true; 6464 if (boot_cpu_data.x86_model == INTEL_FAM6_IVYBRIDGE_X) 6465 x86_pmu.extra_regs = intel_snbep_extra_regs; 6466 else 6467 x86_pmu.extra_regs = intel_snb_extra_regs; 6468 /* all extra regs are per-cpu when HT is on */ 6469 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6470 x86_pmu.flags |= PMU_FL_NO_HT_SHARING; 6471 6472 td_attr = snb_events_attrs; 6473 mem_attr = snb_mem_events_attrs; 6474 6475 /* UOPS_ISSUED.ANY,c=1,i=1 to count stall cycles */ 6476 intel_perfmon_event_map[PERF_COUNT_HW_STALLED_CYCLES_FRONTEND] = 6477 X86_CONFIG(.event=0x0e, .umask=0x01, .inv=1, .cmask=1); 6478 6479 extra_attr = nhm_format_attr; 6480 6481 pr_cont("IvyBridge events, "); 6482 name = "ivybridge"; 6483 break; 6484 6485 6486 case INTEL_FAM6_HASWELL: 6487 case INTEL_FAM6_HASWELL_X: 6488 case INTEL_FAM6_HASWELL_L: 6489 case INTEL_FAM6_HASWELL_G: 6490 x86_add_quirk(intel_ht_bug); 6491 x86_add_quirk(intel_pebs_isolation_quirk); 6492 x86_pmu.late_ack = true; 6493 memcpy(hw_cache_event_ids, hsw_hw_cache_event_ids, sizeof(hw_cache_event_ids)); 6494 memcpy(hw_cache_extra_regs, hsw_hw_cache_extra_regs, sizeof(hw_cache_extra_regs)); 6495 6496 intel_pmu_lbr_init_hsw(); 6497 6498 x86_pmu.event_constraints = intel_hsw_event_constraints; 6499 x86_pmu.pebs_constraints = intel_hsw_pebs_event_constraints; 6500 x86_pmu.extra_regs = intel_snbep_extra_regs; 6501 x86_pmu.pebs_aliases = intel_pebs_aliases_ivb; 6502 x86_pmu.pebs_prec_dist = true; 6503 /* all extra regs are per-cpu when HT is on */ 6504 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6505 x86_pmu.flags |= PMU_FL_NO_HT_SHARING; 6506 6507 x86_pmu.hw_config = hsw_hw_config; 6508 x86_pmu.get_event_constraints = hsw_get_event_constraints; 6509 x86_pmu.limit_period = hsw_limit_period; 6510 x86_pmu.lbr_double_abort = true; 6511 extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? 6512 hsw_format_attr : nhm_format_attr; 6513 td_attr = hsw_events_attrs; 6514 mem_attr = hsw_mem_events_attrs; 6515 tsx_attr = hsw_tsx_events_attrs; 6516 pr_cont("Haswell events, "); 6517 name = "haswell"; 6518 break; 6519 6520 case INTEL_FAM6_BROADWELL: 6521 case INTEL_FAM6_BROADWELL_D: 6522 case INTEL_FAM6_BROADWELL_G: 6523 case INTEL_FAM6_BROADWELL_X: 6524 x86_add_quirk(intel_pebs_isolation_quirk); 6525 x86_pmu.late_ack = true; 6526 memcpy(hw_cache_event_ids, hsw_hw_cache_event_ids, sizeof(hw_cache_event_ids)); 6527 memcpy(hw_cache_extra_regs, hsw_hw_cache_extra_regs, sizeof(hw_cache_extra_regs)); 6528 6529 /* L3_MISS_LOCAL_DRAM is BIT(26) in Broadwell */ 6530 hw_cache_extra_regs[C(LL)][C(OP_READ)][C(RESULT_MISS)] = HSW_DEMAND_READ | 6531 BDW_L3_MISS|HSW_SNOOP_DRAM; 6532 hw_cache_extra_regs[C(LL)][C(OP_WRITE)][C(RESULT_MISS)] = HSW_DEMAND_WRITE|BDW_L3_MISS| 6533 HSW_SNOOP_DRAM; 6534 hw_cache_extra_regs[C(NODE)][C(OP_READ)][C(RESULT_ACCESS)] = HSW_DEMAND_READ| 6535 BDW_L3_MISS_LOCAL|HSW_SNOOP_DRAM; 6536 hw_cache_extra_regs[C(NODE)][C(OP_WRITE)][C(RESULT_ACCESS)] = HSW_DEMAND_WRITE| 6537 BDW_L3_MISS_LOCAL|HSW_SNOOP_DRAM; 6538 6539 intel_pmu_lbr_init_hsw(); 6540 6541 x86_pmu.event_constraints = intel_bdw_event_constraints; 6542 x86_pmu.pebs_constraints = intel_bdw_pebs_event_constraints; 6543 x86_pmu.extra_regs = intel_snbep_extra_regs; 6544 x86_pmu.pebs_aliases = intel_pebs_aliases_ivb; 6545 x86_pmu.pebs_prec_dist = true; 6546 /* all extra regs are per-cpu when HT is on */ 6547 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6548 x86_pmu.flags |= PMU_FL_NO_HT_SHARING; 6549 6550 x86_pmu.hw_config = hsw_hw_config; 6551 x86_pmu.get_event_constraints = hsw_get_event_constraints; 6552 x86_pmu.limit_period = bdw_limit_period; 6553 extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? 6554 hsw_format_attr : nhm_format_attr; 6555 td_attr = hsw_events_attrs; 6556 mem_attr = hsw_mem_events_attrs; 6557 tsx_attr = hsw_tsx_events_attrs; 6558 pr_cont("Broadwell events, "); 6559 name = "broadwell"; 6560 break; 6561 6562 case INTEL_FAM6_XEON_PHI_KNL: 6563 case INTEL_FAM6_XEON_PHI_KNM: 6564 memcpy(hw_cache_event_ids, 6565 slm_hw_cache_event_ids, sizeof(hw_cache_event_ids)); 6566 memcpy(hw_cache_extra_regs, 6567 knl_hw_cache_extra_regs, sizeof(hw_cache_extra_regs)); 6568 intel_pmu_lbr_init_knl(); 6569 6570 x86_pmu.event_constraints = intel_slm_event_constraints; 6571 x86_pmu.pebs_constraints = intel_slm_pebs_event_constraints; 6572 x86_pmu.extra_regs = intel_knl_extra_regs; 6573 6574 /* all extra regs are per-cpu when HT is on */ 6575 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6576 x86_pmu.flags |= PMU_FL_NO_HT_SHARING; 6577 extra_attr = slm_format_attr; 6578 pr_cont("Knights Landing/Mill events, "); 6579 name = "knights-landing"; 6580 break; 6581 6582 case INTEL_FAM6_SKYLAKE_X: 6583 pmem = true; 6584 fallthrough; 6585 case INTEL_FAM6_SKYLAKE_L: 6586 case INTEL_FAM6_SKYLAKE: 6587 case INTEL_FAM6_KABYLAKE_L: 6588 case INTEL_FAM6_KABYLAKE: 6589 case INTEL_FAM6_COMETLAKE_L: 6590 case INTEL_FAM6_COMETLAKE: 6591 x86_add_quirk(intel_pebs_isolation_quirk); 6592 x86_pmu.late_ack = true; 6593 memcpy(hw_cache_event_ids, skl_hw_cache_event_ids, sizeof(hw_cache_event_ids)); 6594 memcpy(hw_cache_extra_regs, skl_hw_cache_extra_regs, sizeof(hw_cache_extra_regs)); 6595 intel_pmu_lbr_init_skl(); 6596 6597 /* INT_MISC.RECOVERY_CYCLES has umask 1 in Skylake */ 6598 event_attr_td_recovery_bubbles.event_str_noht = 6599 "event=0xd,umask=0x1,cmask=1"; 6600 event_attr_td_recovery_bubbles.event_str_ht = 6601 "event=0xd,umask=0x1,cmask=1,any=1"; 6602 6603 x86_pmu.event_constraints = intel_skl_event_constraints; 6604 x86_pmu.pebs_constraints = intel_skl_pebs_event_constraints; 6605 x86_pmu.extra_regs = intel_skl_extra_regs; 6606 x86_pmu.pebs_aliases = intel_pebs_aliases_skl; 6607 x86_pmu.pebs_prec_dist = true; 6608 /* all extra regs are per-cpu when HT is on */ 6609 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6610 x86_pmu.flags |= PMU_FL_NO_HT_SHARING; 6611 6612 x86_pmu.hw_config = hsw_hw_config; 6613 x86_pmu.get_event_constraints = hsw_get_event_constraints; 6614 extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? 6615 hsw_format_attr : nhm_format_attr; 6616 extra_skl_attr = skl_format_attr; 6617 td_attr = hsw_events_attrs; 6618 mem_attr = hsw_mem_events_attrs; 6619 tsx_attr = hsw_tsx_events_attrs; 6620 intel_pmu_pebs_data_source_skl(pmem); 6621 6622 if (boot_cpu_has(X86_FEATURE_TSX_FORCE_ABORT)) { 6623 x86_pmu.flags |= PMU_FL_TFA; 6624 x86_pmu.get_event_constraints = tfa_get_event_constraints; 6625 x86_pmu.enable_all = intel_tfa_pmu_enable_all; 6626 x86_pmu.commit_scheduling = intel_tfa_commit_scheduling; 6627 } 6628 6629 pr_cont("Skylake events, "); 6630 name = "skylake"; 6631 break; 6632 6633 case INTEL_FAM6_ICELAKE_X: 6634 case INTEL_FAM6_ICELAKE_D: 6635 pmem = true; 6636 fallthrough; 6637 case INTEL_FAM6_ICELAKE_L: 6638 case INTEL_FAM6_ICELAKE: 6639 case INTEL_FAM6_TIGERLAKE_L: 6640 case INTEL_FAM6_TIGERLAKE: 6641 x86_pmu.late_ack = true; 6642 memcpy(hw_cache_event_ids, skl_hw_cache_event_ids, sizeof(hw_cache_event_ids)); 6643 memcpy(hw_cache_extra_regs, skl_hw_cache_extra_regs, sizeof(hw_cache_extra_regs)); 6644 hw_cache_event_ids[C(ITLB)][C(OP_READ)][C(RESULT_ACCESS)] = -1; 6645 intel_pmu_lbr_init_skl(); 6646 6647 x86_pmu.event_constraints = intel_icl_event_constraints; 6648 x86_pmu.pebs_constraints = intel_icl_pebs_event_constraints; 6649 x86_pmu.extra_regs = intel_icl_extra_regs; 6650 x86_pmu.pebs_aliases = NULL; 6651 x86_pmu.pebs_prec_dist = true; 6652 x86_pmu.flags |= PMU_FL_HAS_RSP_1; 6653 x86_pmu.flags |= PMU_FL_NO_HT_SHARING; 6654 6655 x86_pmu.hw_config = hsw_hw_config; 6656 x86_pmu.get_event_constraints = icl_get_event_constraints; 6657 extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? 6658 hsw_format_attr : nhm_format_attr; 6659 extra_skl_attr = skl_format_attr; 6660 mem_attr = icl_events_attrs; 6661 td_attr = icl_td_events_attrs; 6662 tsx_attr = icl_tsx_events_attrs; 6663 x86_pmu.rtm_abort_event = X86_CONFIG(.event=0xc9, .umask=0x04); 6664 x86_pmu.lbr_pt_coexist = true; 6665 intel_pmu_pebs_data_source_skl(pmem); 6666 x86_pmu.num_topdown_events = 4; 6667 x86_pmu.update_topdown_event = icl_update_topdown_event; 6668 x86_pmu.set_topdown_event_period = icl_set_topdown_event_period; 6669 pr_cont("Icelake events, "); 6670 name = "icelake"; 6671 break; 6672 6673 case INTEL_FAM6_SAPPHIRERAPIDS_X: 6674 case INTEL_FAM6_EMERALDRAPIDS_X: 6675 x86_pmu.flags |= PMU_FL_MEM_LOADS_AUX; 6676 x86_pmu.extra_regs = intel_glc_extra_regs; 6677 pr_cont("Sapphire Rapids events, "); 6678 name = "sapphire_rapids"; 6679 goto glc_common; 6680 6681 case INTEL_FAM6_GRANITERAPIDS_X: 6682 case INTEL_FAM6_GRANITERAPIDS_D: 6683 if (!x86_pmu.extra_regs) 6684 x86_pmu.extra_regs = intel_rwc_extra_regs; 6685 pr_cont("Granite Rapids events, "); 6686 name = "granite_rapids"; 6687 6688 glc_common: 6689 intel_pmu_init_glc(NULL); 6690 6691 x86_pmu.hw_config = hsw_hw_config; 6692 x86_pmu.get_event_constraints = glc_get_event_constraints; 6693 extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? 6694 hsw_format_attr : nhm_format_attr; 6695 extra_skl_attr = skl_format_attr; 6696 mem_attr = glc_events_attrs; 6697 td_attr = glc_td_events_attrs; 6698 tsx_attr = glc_tsx_events_attrs; 6699 intel_pmu_pebs_data_source_skl(true); 6700 break; 6701 6702 case INTEL_FAM6_ALDERLAKE: 6703 case INTEL_FAM6_ALDERLAKE_L: 6704 case INTEL_FAM6_RAPTORLAKE: 6705 case INTEL_FAM6_RAPTORLAKE_P: 6706 /* 6707 * Alder Lake has 2 types of CPU, core and atom. 6708 * 6709 * Initialize the common PerfMon capabilities here. 6710 */ 6711 intel_pmu_init_hybrid(hybrid_big_small); 6712 6713 x86_pmu.pebs_latency_data = adl_latency_data_small; 6714 6715 x86_pmu.get_event_constraints = adl_get_event_constraints; 6716 x86_pmu.hw_config = adl_hw_config; 6717 x86_pmu.get_hybrid_cpu_type = adl_get_hybrid_cpu_type; 6718 6719 td_attr = adl_hybrid_events_attrs; 6720 mem_attr = adl_hybrid_mem_attrs; 6721 tsx_attr = adl_hybrid_tsx_attrs; 6722 extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? 6723 adl_hybrid_extra_attr_rtm : adl_hybrid_extra_attr; 6724 6725 /* Initialize big core specific PerfMon capabilities.*/ 6726 pmu = &x86_pmu.hybrid_pmu[X86_HYBRID_PMU_CORE_IDX]; 6727 intel_pmu_init_glc(&pmu->pmu); 6728 if (cpu_feature_enabled(X86_FEATURE_HYBRID_CPU)) { 6729 pmu->num_counters = x86_pmu.num_counters + 2; 6730 pmu->num_counters_fixed = x86_pmu.num_counters_fixed + 1; 6731 } else { 6732 pmu->num_counters = x86_pmu.num_counters; 6733 pmu->num_counters_fixed = x86_pmu.num_counters_fixed; 6734 } 6735 6736 /* 6737 * Quirk: For some Alder Lake machine, when all E-cores are disabled in 6738 * a BIOS, the leaf 0xA will enumerate all counters of P-cores. However, 6739 * the X86_FEATURE_HYBRID_CPU is still set. The above codes will 6740 * mistakenly add extra counters for P-cores. Correct the number of 6741 * counters here. 6742 */ 6743 if ((pmu->num_counters > 8) || (pmu->num_counters_fixed > 4)) { 6744 pmu->num_counters = x86_pmu.num_counters; 6745 pmu->num_counters_fixed = x86_pmu.num_counters_fixed; 6746 } 6747 6748 pmu->max_pebs_events = min_t(unsigned, MAX_PEBS_EVENTS, pmu->num_counters); 6749 pmu->unconstrained = (struct event_constraint) 6750 __EVENT_CONSTRAINT(0, (1ULL << pmu->num_counters) - 1, 6751 0, pmu->num_counters, 0, 0); 6752 6753 pmu->extra_regs = intel_glc_extra_regs; 6754 6755 /* Initialize Atom core specific PerfMon capabilities.*/ 6756 pmu = &x86_pmu.hybrid_pmu[X86_HYBRID_PMU_ATOM_IDX]; 6757 intel_pmu_init_grt(&pmu->pmu); 6758 6759 x86_pmu.flags |= PMU_FL_MEM_LOADS_AUX; 6760 intel_pmu_pebs_data_source_adl(); 6761 pr_cont("Alderlake Hybrid events, "); 6762 name = "alderlake_hybrid"; 6763 break; 6764
6765 case INTEL_FAM6_METEORLAKE: 6766 case INTEL_FAM6_METEORLAKE_L: 6767 intel_pmu_init_hybrid(hybrid_big_small); 6768 6769 x86_pmu.pebs_latency_data = mtl_latency_data_small; 6770 x86_pmu.get_event_constraints = mtl_get_event_constraints; 6771 x86_pmu.hw_config = adl_hw_config; 6772 6773 td_attr = adl_hybrid_events_attrs; 6774 mem_attr = mtl_hybrid_mem_attrs; 6775 tsx_attr = adl_hybrid_tsx_attrs; 6776 extra_attr = boot_cpu_has(X86_FEATURE_RTM) ? 6777 mtl_hybrid_extra_attr_rtm : mtl_hybrid_extra_attr; 6778 6779 /* Initialize big core specific PerfMon capabilities.*/ 6780 pmu = &x86_pmu.hybrid_pmu[X86_HYBRID_PMU_CORE_IDX]; 6781 intel_pmu_init_glc(&pmu->pmu); 6782 break; 6783 6784 default: 6785 switch (x86_pmu.version) { 6786 case 1: 6787 x86_pmu.event_constraints = intel_v1_event_constraints; 6788 pr_cont("generic architected perfmon v1, "); 6789 name = "generic_arch_v1"; 6790 break; 6791 case 2: 6792 case 3: 6793 case 4: 6794 /* 6795 * default constraints for v2 and up 6796 */ 6797 x86_pmu.event_constraints = intel_gen_event_constraints; 6798 pr_cont("generic architected perfmon, "); 6799 name = "generic_arch_v2+"; 6800 break; 6801 default: 6802 /* 6803 * The default constraints for v5 and up can support up to 6804 * 16 fixed counters. For the fixed counters 4 and later, 6805 * the pseudo-encoding is applied. 6806 * The constraints may be cut according to the CPUID enumeration 6807 * by inserting the EVENT_CONSTRAINT_END. 6808 */ 6809 if (x86_pmu.num_counters_fixed > INTEL_PMC_MAX_FIXED) 6810 x86_pmu.num_counters_fixed = INTEL_PMC_MAX_FIXED; 6811 intel_v5_gen_event_constraints[x86_pmu.num_counters_fixed].weight = -1; 6812 x86_pmu.event_constraints = intel_v5_gen_event_constraints; 6813 pr_cont("generic architected perfmon, "); 6814 name = "generic_arch_v5+"; 6815 break; 6816 } 6817 } 6818 6819 snprintf(pmu_name_str, sizeof(pmu_name_str), "%s", name); 6820 6821 if (!is_hybrid()) { 6822 group_events_td.attrs = td_attr; 6823 group_events_mem.attrs = mem_attr; 6824 group_events_tsx.attrs = tsx_attr; 6825 group_format_extra.attrs = extra_attr; 6826 group_format_extra_skl.attrs = extra_skl_attr; 6827 6828 x86_pmu.attr_update = attr_update; 6829 } else { 6830 hybrid_group_events_td.attrs = td_attr; 6831 hybrid_group_events_mem.attrs = mem_attr; 6832 hybrid_group_events_tsx.attrs = tsx_attr; 6833 hybrid_group_format_extra.attrs = extra_attr; 6834 6835 x86_pmu.attr_update = hybrid_attr_update; 6836 } 6837 6838 intel_pmu_check_num_counters(&x86_pmu.num_counters, 6839 &x86_pmu.num_counters_fixed, 6840 &x86_pmu.intel_ctrl, 6841 (u64)fixed_mask); 6842 6843 /* AnyThread may be deprecated on arch perfmon v5 or later */ 6844 if (x86_pmu.intel_cap.anythread_deprecated) 6845 x86_pmu.format_attrs = intel_arch_formats_attr; 6846 6847 intel_pmu_check_event_constraints(x86_pmu.event_constraints, 6848 x86_pmu.num_counters, 6849 x86_pmu.num_counters_fixed, 6850 x86_pmu.intel_ctrl); 6851 /* 6852 * Access LBR MSR may cause #GP under certain circumstances. 6853 * E.g. KVM doesn't support LBR MSR 6854 * Check all LBT MSR here. 6855 * Disable LBR access if any LBR MSRs can not be accessed. 6856 */ 6857 if (x86_pmu.lbr_tos && !check_msr(x86_pmu.lbr_tos, 0x3UL)) 6858 x86_pmu.lbr_nr = 0; 6859 for (i = 0; i < x86_pmu.lbr_nr; i++) { 6860 if (!(check_msr(x86_pmu.lbr_from + i, 0xffffUL) && 6861 check_msr(x86_pmu.lbr_to + i, 0xffffUL))) 6862 x86_pmu.lbr_nr = 0; 6863 } 6864 6865 if (x86_pmu.lbr_nr) 6866 pr_cont("%d-deep LBR, ", x86_pmu.lbr_nr); 6867 6868 intel_pmu_check_extra_regs(x86_pmu.extra_regs); 6869 6870 /* Support full width counters using alternative MSR range */ 6871 if (x86_pmu.intel_cap.full_width_write) { 6872 x86_pmu.max_period = x86_pmu.cntval_mask >> 1; 6873 x86_pmu.perfctr = MSR_IA32_PMC0; 6874 pr_cont("full-width counters, "); 6875 } 6876 6877 /* 6878 * For arch perfmon 4 use counter freezing to avoid 6879 * several MSR accesses in the PMI. 6880 */ 6881 if (x86_pmu.counter_freezing) 6882 x86_pmu.handle_irq = intel_pmu_handle_irq_v4; 6883 6884 if (!is_hybrid() && x86_pmu.intel_cap.perf_metrics) 6885 x86_pmu.intel_ctrl |= 1ULL << GLOBAL_CTRL_EN_PERF_METRICS; 6886 6887 if (is_hybrid() && !boot_cpu_has(X86_FEATURE_ARCH_PERFMON_EXT)) 6888 intel_pmu_check_hybrid_pmus((u64)fixed_mask); 6889 6890 if (x86_pmu.intel_cap.pebs_timing_info) 6891 x86_pmu.flags |= PMU_FL_RETIRE_LATENCY; 6892 6893 return 0; 6894 } 6895
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