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sys/dev/hwpmc/hwpmc_amd.c
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1 /*- 2 * Copyright (c) 2003-2008 Joseph Koshy 3 * Copyright (c) 2007 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * Portions of this software were developed by A. Joseph Koshy under 7 * sponsorship from the FreeBSD Foundation and Google, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD: releng/7.3/sys/dev/hwpmc/hwpmc_amd.c 193634 2009-06-07 10:00:35Z fabient $"); 33 34 /* Support for the AMD K7 and later processors */ 35 36 #include <sys/param.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/mutex.h> 40 #include <sys/pmc.h> 41 #include <sys/pmckern.h> 42 #include <sys/smp.h> 43 #include <sys/systm.h> 44 45 #include <machine/cpu.h> 46 #include <machine/cpufunc.h> 47 #include <machine/md_var.h> 48 #include <machine/specialreg.h> 49 50 #ifdef DEBUG 51 enum pmc_class amd_pmc_class; 52 #endif 53 54 /* AMD K7 & K8 PMCs */ 55 struct amd_descr { 56 struct pmc_descr pm_descr; /* "base class" */ 57 uint32_t pm_evsel; /* address of EVSEL register */ 58 uint32_t pm_perfctr; /* address of PERFCTR register */ 59 }; 60 61 static struct amd_descr amd_pmcdesc[AMD_NPMCS] = 62 { 63 { 64 .pm_descr = 65 { 66 .pd_name = "", 67 .pd_class = -1, 68 .pd_caps = AMD_PMC_CAPS, 69 .pd_width = 48 70 }, 71 .pm_evsel = AMD_PMC_EVSEL_0, 72 .pm_perfctr = AMD_PMC_PERFCTR_0 73 }, 74 { 75 .pm_descr = 76 { 77 .pd_name = "", 78 .pd_class = -1, 79 .pd_caps = AMD_PMC_CAPS, 80 .pd_width = 48 81 }, 82 .pm_evsel = AMD_PMC_EVSEL_1, 83 .pm_perfctr = AMD_PMC_PERFCTR_1 84 }, 85 { 86 .pm_descr = 87 { 88 .pd_name = "", 89 .pd_class = -1, 90 .pd_caps = AMD_PMC_CAPS, 91 .pd_width = 48 92 }, 93 .pm_evsel = AMD_PMC_EVSEL_2, 94 .pm_perfctr = AMD_PMC_PERFCTR_2 95 }, 96 { 97 .pm_descr = 98 { 99 .pd_name = "", 100 .pd_class = -1, 101 .pd_caps = AMD_PMC_CAPS, 102 .pd_width = 48 103 }, 104 .pm_evsel = AMD_PMC_EVSEL_3, 105 .pm_perfctr = AMD_PMC_PERFCTR_3 106 } 107 }; 108 109 struct amd_event_code_map { 110 enum pmc_event pe_ev; /* enum value */ 111 uint8_t pe_code; /* encoded event mask */ 112 uint8_t pe_mask; /* bits allowed in unit mask */ 113 }; 114 115 const struct amd_event_code_map amd_event_codes[] = { 116 #if defined(__i386__) /* 32 bit Athlon (K7) only */ 117 { PMC_EV_K7_DC_ACCESSES, 0x40, 0 }, 118 { PMC_EV_K7_DC_MISSES, 0x41, 0 }, 119 { PMC_EV_K7_DC_REFILLS_FROM_L2, 0x42, AMD_PMC_UNITMASK_MOESI }, 120 { PMC_EV_K7_DC_REFILLS_FROM_SYSTEM, 0x43, AMD_PMC_UNITMASK_MOESI }, 121 { PMC_EV_K7_DC_WRITEBACKS, 0x44, AMD_PMC_UNITMASK_MOESI }, 122 { PMC_EV_K7_L1_DTLB_MISS_AND_L2_DTLB_HITS, 0x45, 0 }, 123 { PMC_EV_K7_L1_AND_L2_DTLB_MISSES, 0x46, 0 }, 124 { PMC_EV_K7_MISALIGNED_REFERENCES, 0x47, 0 }, 125 126 { PMC_EV_K7_IC_FETCHES, 0x80, 0 }, 127 { PMC_EV_K7_IC_MISSES, 0x81, 0 }, 128 129 { PMC_EV_K7_L1_ITLB_MISSES, 0x84, 0 }, 130 { PMC_EV_K7_L1_L2_ITLB_MISSES, 0x85, 0 }, 131 132 { PMC_EV_K7_RETIRED_INSTRUCTIONS, 0xC0, 0 }, 133 { PMC_EV_K7_RETIRED_OPS, 0xC1, 0 }, 134 { PMC_EV_K7_RETIRED_BRANCHES, 0xC2, 0 }, 135 { PMC_EV_K7_RETIRED_BRANCHES_MISPREDICTED, 0xC3, 0 }, 136 { PMC_EV_K7_RETIRED_TAKEN_BRANCHES, 0xC4, 0 }, 137 { PMC_EV_K7_RETIRED_TAKEN_BRANCHES_MISPREDICTED, 0xC5, 0 }, 138 { PMC_EV_K7_RETIRED_FAR_CONTROL_TRANSFERS, 0xC6, 0 }, 139 { PMC_EV_K7_RETIRED_RESYNC_BRANCHES, 0xC7, 0 }, 140 { PMC_EV_K7_INTERRUPTS_MASKED_CYCLES, 0xCD, 0 }, 141 { PMC_EV_K7_INTERRUPTS_MASKED_WHILE_PENDING_CYCLES, 0xCE, 0 }, 142 { PMC_EV_K7_HARDWARE_INTERRUPTS, 0xCF, 0 }, 143 #endif 144 145 { PMC_EV_K8_FP_DISPATCHED_FPU_OPS, 0x00, 0x3F }, 146 { PMC_EV_K8_FP_CYCLES_WITH_NO_FPU_OPS_RETIRED, 0x01, 0x00 }, 147 { PMC_EV_K8_FP_DISPATCHED_FPU_FAST_FLAG_OPS, 0x02, 0x00 }, 148 149 { PMC_EV_K8_LS_SEGMENT_REGISTER_LOAD, 0x20, 0x7F }, 150 { PMC_EV_K8_LS_MICROARCHITECTURAL_RESYNC_BY_SELF_MODIFYING_CODE, 151 0x21, 0x00 }, 152 { PMC_EV_K8_LS_MICROARCHITECTURAL_RESYNC_BY_SNOOP, 0x22, 0x00 }, 153 { PMC_EV_K8_LS_BUFFER2_FULL, 0x23, 0x00 }, 154 { PMC_EV_K8_LS_LOCKED_OPERATION, 0x24, 0x07 }, 155 { PMC_EV_K8_LS_MICROARCHITECTURAL_LATE_CANCEL, 0x25, 0x00 }, 156 { PMC_EV_K8_LS_RETIRED_CFLUSH_INSTRUCTIONS, 0x26, 0x00 }, 157 { PMC_EV_K8_LS_RETIRED_CPUID_INSTRUCTIONS, 0x27, 0x00 }, 158 159 { PMC_EV_K8_DC_ACCESS, 0x40, 0x00 }, 160 { PMC_EV_K8_DC_MISS, 0x41, 0x00 }, 161 { PMC_EV_K8_DC_REFILL_FROM_L2, 0x42, 0x1F }, 162 { PMC_EV_K8_DC_REFILL_FROM_SYSTEM, 0x43, 0x1F }, 163 { PMC_EV_K8_DC_COPYBACK, 0x44, 0x1F }, 164 { PMC_EV_K8_DC_L1_DTLB_MISS_AND_L2_DTLB_HIT, 0x45, 0x00 }, 165 { PMC_EV_K8_DC_L1_DTLB_MISS_AND_L2_DTLB_MISS, 0x46, 0x00 }, 166 { PMC_EV_K8_DC_MISALIGNED_DATA_REFERENCE, 0x47, 0x00 }, 167 { PMC_EV_K8_DC_MICROARCHITECTURAL_LATE_CANCEL, 0x48, 0x00 }, 168 { PMC_EV_K8_DC_MICROARCHITECTURAL_EARLY_CANCEL, 0x49, 0x00 }, 169 { PMC_EV_K8_DC_ONE_BIT_ECC_ERROR, 0x4A, 0x03 }, 170 { PMC_EV_K8_DC_DISPATCHED_PREFETCH_INSTRUCTIONS, 0x4B, 0x07 }, 171 { PMC_EV_K8_DC_DCACHE_ACCESSES_BY_LOCKS, 0x4C, 0x03 }, 172 173 { PMC_EV_K8_BU_CPU_CLK_UNHALTED, 0x76, 0x00 }, 174 { PMC_EV_K8_BU_INTERNAL_L2_REQUEST, 0x7D, 0x1F }, 175 { PMC_EV_K8_BU_FILL_REQUEST_L2_MISS, 0x7E, 0x07 }, 176 { PMC_EV_K8_BU_FILL_INTO_L2, 0x7F, 0x03 }, 177 178 { PMC_EV_K8_IC_FETCH, 0x80, 0x00 }, 179 { PMC_EV_K8_IC_MISS, 0x81, 0x00 }, 180 { PMC_EV_K8_IC_REFILL_FROM_L2, 0x82, 0x00 }, 181 { PMC_EV_K8_IC_REFILL_FROM_SYSTEM, 0x83, 0x00 }, 182 { PMC_EV_K8_IC_L1_ITLB_MISS_AND_L2_ITLB_HIT, 0x84, 0x00 }, 183 { PMC_EV_K8_IC_L1_ITLB_MISS_AND_L2_ITLB_MISS, 0x85, 0x00 }, 184 { PMC_EV_K8_IC_MICROARCHITECTURAL_RESYNC_BY_SNOOP, 0x86, 0x00 }, 185 { PMC_EV_K8_IC_INSTRUCTION_FETCH_STALL, 0x87, 0x00 }, 186 { PMC_EV_K8_IC_RETURN_STACK_HIT, 0x88, 0x00 }, 187 { PMC_EV_K8_IC_RETURN_STACK_OVERFLOW, 0x89, 0x00 }, 188 189 { PMC_EV_K8_FR_RETIRED_X86_INSTRUCTIONS, 0xC0, 0x00 }, 190 { PMC_EV_K8_FR_RETIRED_UOPS, 0xC1, 0x00 }, 191 { PMC_EV_K8_FR_RETIRED_BRANCHES, 0xC2, 0x00 }, 192 { PMC_EV_K8_FR_RETIRED_BRANCHES_MISPREDICTED, 0xC3, 0x00 }, 193 { PMC_EV_K8_FR_RETIRED_TAKEN_BRANCHES, 0xC4, 0x00 }, 194 { PMC_EV_K8_FR_RETIRED_TAKEN_BRANCHES_MISPREDICTED, 0xC5, 0x00 }, 195 { PMC_EV_K8_FR_RETIRED_FAR_CONTROL_TRANSFERS, 0xC6, 0x00 }, 196 { PMC_EV_K8_FR_RETIRED_RESYNCS, 0xC7, 0x00 }, 197 { PMC_EV_K8_FR_RETIRED_NEAR_RETURNS, 0xC8, 0x00 }, 198 { PMC_EV_K8_FR_RETIRED_NEAR_RETURNS_MISPREDICTED, 0xC9, 0x00 }, 199 { PMC_EV_K8_FR_RETIRED_TAKEN_BRANCHES_MISPREDICTED_BY_ADDR_MISCOMPARE, 200 0xCA, 0x00 }, 201 { PMC_EV_K8_FR_RETIRED_FPU_INSTRUCTIONS, 0xCB, 0x0F }, 202 { PMC_EV_K8_FR_RETIRED_FASTPATH_DOUBLE_OP_INSTRUCTIONS, 203 0xCC, 0x07 }, 204 { PMC_EV_K8_FR_INTERRUPTS_MASKED_CYCLES, 0xCD, 0x00 }, 205 { PMC_EV_K8_FR_INTERRUPTS_MASKED_WHILE_PENDING_CYCLES, 0xCE, 0x00 }, 206 { PMC_EV_K8_FR_TAKEN_HARDWARE_INTERRUPTS, 0xCF, 0x00 }, 207 208 { PMC_EV_K8_FR_DECODER_EMPTY, 0xD0, 0x00 }, 209 { PMC_EV_K8_FR_DISPATCH_STALLS, 0xD1, 0x00 }, 210 { PMC_EV_K8_FR_DISPATCH_STALL_FROM_BRANCH_ABORT_TO_RETIRE, 211 0xD2, 0x00 }, 212 { PMC_EV_K8_FR_DISPATCH_STALL_FOR_SERIALIZATION, 0xD3, 0x00 }, 213 { PMC_EV_K8_FR_DISPATCH_STALL_FOR_SEGMENT_LOAD, 0xD4, 0x00 }, 214 { PMC_EV_K8_FR_DISPATCH_STALL_WHEN_REORDER_BUFFER_IS_FULL, 215 0xD5, 0x00 }, 216 { PMC_EV_K8_FR_DISPATCH_STALL_WHEN_RESERVATION_STATIONS_ARE_FULL, 217 0xD6, 0x00 }, 218 { PMC_EV_K8_FR_DISPATCH_STALL_WHEN_FPU_IS_FULL, 0xD7, 0x00 }, 219 { PMC_EV_K8_FR_DISPATCH_STALL_WHEN_LS_IS_FULL, 0xD8, 0x00 }, 220 { PMC_EV_K8_FR_DISPATCH_STALL_WHEN_WAITING_FOR_ALL_TO_BE_QUIET, 221 0xD9, 0x00 }, 222 { PMC_EV_K8_FR_DISPATCH_STALL_WHEN_FAR_XFER_OR_RESYNC_BRANCH_PENDING, 223 0xDA, 0x00 }, 224 { PMC_EV_K8_FR_FPU_EXCEPTIONS, 0xDB, 0x0F }, 225 { PMC_EV_K8_FR_NUMBER_OF_BREAKPOINTS_FOR_DR0, 0xDC, 0x00 }, 226 { PMC_EV_K8_FR_NUMBER_OF_BREAKPOINTS_FOR_DR1, 0xDD, 0x00 }, 227 { PMC_EV_K8_FR_NUMBER_OF_BREAKPOINTS_FOR_DR2, 0xDE, 0x00 }, 228 { PMC_EV_K8_FR_NUMBER_OF_BREAKPOINTS_FOR_DR3, 0xDF, 0x00 }, 229 230 { PMC_EV_K8_NB_MEMORY_CONTROLLER_PAGE_ACCESS_EVENT, 0xE0, 0x7 }, 231 { PMC_EV_K8_NB_MEMORY_CONTROLLER_PAGE_TABLE_OVERFLOW, 0xE1, 0x00 }, 232 { PMC_EV_K8_NB_MEMORY_CONTROLLER_DRAM_COMMAND_SLOTS_MISSED, 233 0xE2, 0x00 }, 234 { PMC_EV_K8_NB_MEMORY_CONTROLLER_TURNAROUND, 0xE3, 0x07 }, 235 { PMC_EV_K8_NB_MEMORY_CONTROLLER_BYPASS_SATURATION, 0xE4, 0x0F }, 236 { PMC_EV_K8_NB_SIZED_COMMANDS, 0xEB, 0x7F }, 237 { PMC_EV_K8_NB_PROBE_RESULT, 0xEC, 0x0F }, 238 { PMC_EV_K8_NB_HT_BUS0_BANDWIDTH, 0xF6, 0x0F }, 239 { PMC_EV_K8_NB_HT_BUS1_BANDWIDTH, 0xF7, 0x0F }, 240 { PMC_EV_K8_NB_HT_BUS2_BANDWIDTH, 0xF8, 0x0F } 241 242 }; 243 244 const int amd_event_codes_size = 245 sizeof(amd_event_codes) / sizeof(amd_event_codes[0]); 246 247 /* 248 * Per-processor information 249 */ 250 251 struct amd_cpu { 252 struct pmc_hw pc_amdpmcs[AMD_NPMCS]; 253 }; 254 255 static struct amd_cpu **amd_pcpu; 256 257 /* 258 * read a pmc register 259 */ 260 261 static int 262 amd_read_pmc(int cpu, int ri, pmc_value_t *v) 263 { 264 enum pmc_mode mode; 265 const struct amd_descr *pd; 266 struct pmc *pm; 267 pmc_value_t tmp; 268 269 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 270 ("[amd,%d] illegal CPU value %d", __LINE__, cpu)); 271 KASSERT(ri >= 0 && ri < AMD_NPMCS, 272 ("[amd,%d] illegal row-index %d", __LINE__, ri)); 273 KASSERT(amd_pcpu[cpu], 274 ("[amd,%d] null per-cpu, cpu %d", __LINE__, cpu)); 275 276 pm = amd_pcpu[cpu]->pc_amdpmcs[ri].phw_pmc; 277 pd = &amd_pmcdesc[ri]; 278 279 KASSERT(pm != NULL, 280 ("[amd,%d] No owner for HWPMC [cpu%d,pmc%d]", __LINE__, 281 cpu, ri)); 282 283 mode = PMC_TO_MODE(pm); 284 285 PMCDBG(MDP,REA,1,"amd-read id=%d class=%d", ri, pd->pm_descr.pd_class); 286 287 #ifdef DEBUG 288 KASSERT(pd->pm_descr.pd_class == amd_pmc_class, 289 ("[amd,%d] unknown PMC class (%d)", __LINE__, 290 pd->pm_descr.pd_class)); 291 #endif 292 293 tmp = rdmsr(pd->pm_perfctr); /* RDMSR serializes */ 294 PMCDBG(MDP,REA,2,"amd-read (pre-munge) id=%d -> %jd", ri, tmp); 295 if (PMC_IS_SAMPLING_MODE(mode)) { 296 /* Sign extend 48 bit value to 64 bits. */ 297 tmp = (pmc_value_t) (((int64_t) tmp << 16) >> 16); 298 tmp = AMD_PERFCTR_VALUE_TO_RELOAD_COUNT(tmp); 299 } 300 *v = tmp; 301 302 PMCDBG(MDP,REA,2,"amd-read (post-munge) id=%d -> %jd", ri, *v); 303 304 return 0; 305 } 306 307 /* 308 * Write a PMC MSR. 309 */ 310 311 static int 312 amd_write_pmc(int cpu, int ri, pmc_value_t v) 313 { 314 const struct amd_descr *pd; 315 enum pmc_mode mode; 316 struct pmc *pm; 317 318 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 319 ("[amd,%d] illegal CPU value %d", __LINE__, cpu)); 320 KASSERT(ri >= 0 && ri < AMD_NPMCS, 321 ("[amd,%d] illegal row-index %d", __LINE__, ri)); 322 323 pm = amd_pcpu[cpu]->pc_amdpmcs[ri].phw_pmc; 324 pd = &amd_pmcdesc[ri]; 325 326 KASSERT(pm != NULL, 327 ("[amd,%d] PMC not owned (cpu%d,pmc%d)", __LINE__, 328 cpu, ri)); 329 330 mode = PMC_TO_MODE(pm); 331 332 #ifdef DEBUG 333 KASSERT(pd->pm_descr.pd_class == amd_pmc_class, 334 ("[amd,%d] unknown PMC class (%d)", __LINE__, 335 pd->pm_descr.pd_class)); 336 #endif 337 338 /* use 2's complement of the count for sampling mode PMCs */ 339 if (PMC_IS_SAMPLING_MODE(mode)) 340 v = AMD_RELOAD_COUNT_TO_PERFCTR_VALUE(v); 341 342 PMCDBG(MDP,WRI,1,"amd-write cpu=%d ri=%d v=%jx", cpu, ri, v); 343 344 /* write the PMC value */ 345 wrmsr(pd->pm_perfctr, v); 346 return 0; 347 } 348 349 /* 350 * configure hardware pmc according to the configuration recorded in 351 * pmc 'pm'. 352 */ 353 354 static int 355 amd_config_pmc(int cpu, int ri, struct pmc *pm) 356 { 357 struct pmc_hw *phw; 358 359 PMCDBG(MDP,CFG,1, "cpu=%d ri=%d pm=%p", cpu, ri, pm); 360 361 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 362 ("[amd,%d] illegal CPU value %d", __LINE__, cpu)); 363 KASSERT(ri >= 0 && ri < AMD_NPMCS, 364 ("[amd,%d] illegal row-index %d", __LINE__, ri)); 365 366 phw = &amd_pcpu[cpu]->pc_amdpmcs[ri]; 367 368 KASSERT(pm == NULL || phw->phw_pmc == NULL, 369 ("[amd,%d] pm=%p phw->pm=%p hwpmc not unconfigured", 370 __LINE__, pm, phw->phw_pmc)); 371 372 phw->phw_pmc = pm; 373 return 0; 374 } 375 376 /* 377 * Retrieve a configured PMC pointer from hardware state. 378 */ 379 380 static int 381 amd_get_config(int cpu, int ri, struct pmc **ppm) 382 { 383 *ppm = amd_pcpu[cpu]->pc_amdpmcs[ri].phw_pmc; 384 385 return 0; 386 } 387 388 /* 389 * Machine dependent actions taken during the context switch in of a 390 * thread. 391 */ 392 393 static int 394 amd_switch_in(struct pmc_cpu *pc, struct pmc_process *pp) 395 { 396 (void) pc; 397 398 PMCDBG(MDP,SWI,1, "pc=%p pp=%p enable-msr=%d", pc, pp, 399 (pp->pp_flags & PMC_PP_ENABLE_MSR_ACCESS) != 0); 400 401 /* enable the RDPMC instruction if needed */ 402 if (pp->pp_flags & PMC_PP_ENABLE_MSR_ACCESS) 403 load_cr4(rcr4() | CR4_PCE); 404 405 return 0; 406 } 407 408 /* 409 * Machine dependent actions taken during the context switch out of a 410 * thread. 411 */ 412 413 static int 414 amd_switch_out(struct pmc_cpu *pc, struct pmc_process *pp) 415 { 416 (void) pc; 417 (void) pp; /* can be NULL */ 418 419 PMCDBG(MDP,SWO,1, "pc=%p pp=%p enable-msr=%d", pc, pp, pp ? 420 (pp->pp_flags & PMC_PP_ENABLE_MSR_ACCESS) == 1 : 0); 421 422 /* always turn off the RDPMC instruction */ 423 load_cr4(rcr4() & ~CR4_PCE); 424 425 return 0; 426 } 427 428 /* 429 * Check if a given allocation is feasible. 430 */ 431 432 static int 433 amd_allocate_pmc(int cpu, int ri, struct pmc *pm, 434 const struct pmc_op_pmcallocate *a) 435 { 436 int i; 437 uint32_t allowed_unitmask, caps, config, unitmask; 438 enum pmc_event pe; 439 const struct pmc_descr *pd; 440 441 (void) cpu; 442 443 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 444 ("[amd,%d] illegal CPU value %d", __LINE__, cpu)); 445 KASSERT(ri >= 0 && ri < AMD_NPMCS, 446 ("[amd,%d] illegal row index %d", __LINE__, ri)); 447 448 pd = &amd_pmcdesc[ri].pm_descr; 449 450 /* check class match */ 451 if (pd->pd_class != a->pm_class) 452 return EINVAL; 453 454 caps = pm->pm_caps; 455 456 PMCDBG(MDP,ALL,1,"amd-allocate ri=%d caps=0x%x", ri, caps); 457 458 if ((pd->pd_caps & caps) != caps) 459 return EPERM; 460 461 pe = a->pm_ev; 462 463 /* map ev to the correct event mask code */ 464 config = allowed_unitmask = 0; 465 for (i = 0; i < amd_event_codes_size; i++) 466 if (amd_event_codes[i].pe_ev == pe) { 467 config = 468 AMD_PMC_TO_EVENTMASK(amd_event_codes[i].pe_code); 469 allowed_unitmask = 470 AMD_PMC_TO_UNITMASK(amd_event_codes[i].pe_mask); 471 break; 472 } 473 if (i == amd_event_codes_size) 474 return EINVAL; 475 476 unitmask = a->pm_md.pm_amd.pm_amd_config & AMD_PMC_UNITMASK; 477 if (unitmask & ~allowed_unitmask) /* disallow reserved bits */ 478 return EINVAL; 479 480 if (unitmask && (caps & PMC_CAP_QUALIFIER)) 481 config |= unitmask; 482 483 if (caps & PMC_CAP_THRESHOLD) 484 config |= a->pm_md.pm_amd.pm_amd_config & AMD_PMC_COUNTERMASK; 485 486 /* set at least one of the 'usr' or 'os' caps */ 487 if (caps & PMC_CAP_USER) 488 config |= AMD_PMC_USR; 489 if (caps & PMC_CAP_SYSTEM) 490 config |= AMD_PMC_OS; 491 if ((caps & (PMC_CAP_USER|PMC_CAP_SYSTEM)) == 0) 492 config |= (AMD_PMC_USR|AMD_PMC_OS); 493 494 if (caps & PMC_CAP_EDGE) 495 config |= AMD_PMC_EDGE; 496 if (caps & PMC_CAP_INVERT) 497 config |= AMD_PMC_INVERT; 498 if (caps & PMC_CAP_INTERRUPT) 499 config |= AMD_PMC_INT; 500 501 pm->pm_md.pm_amd.pm_amd_evsel = config; /* save config value */ 502 503 PMCDBG(MDP,ALL,2,"amd-allocate ri=%d -> config=0x%x", ri, config); 504 505 return 0; 506 } 507 508 /* 509 * Release machine dependent state associated with a PMC. This is a 510 * no-op on this architecture. 511 * 512 */ 513 514 /* ARGSUSED0 */ 515 static int 516 amd_release_pmc(int cpu, int ri, struct pmc *pmc) 517 { 518 #ifdef DEBUG 519 const struct amd_descr *pd; 520 #endif 521 struct pmc_hw *phw; 522 523 (void) pmc; 524 525 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 526 ("[amd,%d] illegal CPU value %d", __LINE__, cpu)); 527 KASSERT(ri >= 0 && ri < AMD_NPMCS, 528 ("[amd,%d] illegal row-index %d", __LINE__, ri)); 529 530 phw = &amd_pcpu[cpu]->pc_amdpmcs[ri]; 531 532 KASSERT(phw->phw_pmc == NULL, 533 ("[amd,%d] PHW pmc %p non-NULL", __LINE__, phw->phw_pmc)); 534 535 #ifdef DEBUG 536 pd = &amd_pmcdesc[ri]; 537 if (pd->pm_descr.pd_class == amd_pmc_class) 538 KASSERT(AMD_PMC_IS_STOPPED(pd->pm_evsel), 539 ("[amd,%d] PMC %d released while active", __LINE__, ri)); 540 #endif 541 542 return 0; 543 } 544 545 /* 546 * start a PMC. 547 */ 548 549 static int 550 amd_start_pmc(int cpu, int ri) 551 { 552 uint32_t config; 553 struct pmc *pm; 554 struct pmc_hw *phw; 555 const struct amd_descr *pd; 556 557 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 558 ("[amd,%d] illegal CPU value %d", __LINE__, cpu)); 559 KASSERT(ri >= 0 && ri < AMD_NPMCS, 560 ("[amd,%d] illegal row-index %d", __LINE__, ri)); 561 562 phw = &amd_pcpu[cpu]->pc_amdpmcs[ri]; 563 pm = phw->phw_pmc; 564 pd = &amd_pmcdesc[ri]; 565 566 KASSERT(pm != NULL, 567 ("[amd,%d] starting cpu%d,pmc%d with null pmc record", __LINE__, 568 cpu, ri)); 569 570 PMCDBG(MDP,STA,1,"amd-start cpu=%d ri=%d", cpu, ri); 571 572 KASSERT(AMD_PMC_IS_STOPPED(pd->pm_evsel), 573 ("[amd,%d] pmc%d,cpu%d: Starting active PMC \"%s\"", __LINE__, 574 ri, cpu, pd->pm_descr.pd_name)); 575 576 /* turn on the PMC ENABLE bit */ 577 config = pm->pm_md.pm_amd.pm_amd_evsel | AMD_PMC_ENABLE; 578 579 PMCDBG(MDP,STA,2,"amd-start config=0x%x", config); 580 581 wrmsr(pd->pm_evsel, config); 582 return 0; 583 } 584 585 /* 586 * Stop a PMC. 587 */ 588 589 static int 590 amd_stop_pmc(int cpu, int ri) 591 { 592 struct pmc *pm; 593 struct pmc_hw *phw; 594 const struct amd_descr *pd; 595 uint64_t config; 596 597 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 598 ("[amd,%d] illegal CPU value %d", __LINE__, cpu)); 599 KASSERT(ri >= 0 && ri < AMD_NPMCS, 600 ("[amd,%d] illegal row-index %d", __LINE__, ri)); 601 602 phw = &amd_pcpu[cpu]->pc_amdpmcs[ri]; 603 pm = phw->phw_pmc; 604 pd = &amd_pmcdesc[ri]; 605 606 KASSERT(pm != NULL, 607 ("[amd,%d] cpu%d,pmc%d no PMC to stop", __LINE__, 608 cpu, ri)); 609 KASSERT(!AMD_PMC_IS_STOPPED(pd->pm_evsel), 610 ("[amd,%d] PMC%d, CPU%d \"%s\" already stopped", 611 __LINE__, ri, cpu, pd->pm_descr.pd_name)); 612 613 PMCDBG(MDP,STO,1,"amd-stop ri=%d", ri); 614 615 /* turn off the PMC ENABLE bit */ 616 config = pm->pm_md.pm_amd.pm_amd_evsel & ~AMD_PMC_ENABLE; 617 wrmsr(pd->pm_evsel, config); 618 return 0; 619 } 620 621 /* 622 * Interrupt handler. This function needs to return '1' if the 623 * interrupt was this CPU's PMCs or '' otherwise. It is not allowed 624 * to sleep or do anything a 'fast' interrupt handler is not allowed 625 * to do. 626 */ 627 628 static int 629 amd_intr(int cpu, struct trapframe *tf) 630 { 631 int i, error, retval; 632 uint32_t config, evsel, perfctr; 633 struct pmc *pm; 634 struct amd_cpu *pac; 635 pmc_value_t v; 636 637 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 638 ("[amd,%d] out of range CPU %d", __LINE__, cpu)); 639 640 PMCDBG(MDP,INT,1, "cpu=%d tf=%p um=%d", cpu, (void *) tf, 641 TRAPF_USERMODE(tf)); 642 643 retval = 0; 644 645 pac = amd_pcpu[cpu]; 646 647 /* 648 * look for all PMCs that have interrupted: 649 * - look for a running, sampling PMC which has overflowed 650 * and which has a valid 'struct pmc' association 651 * 652 * If found, we call a helper to process the interrupt. 653 * 654 * If multiple PMCs interrupt at the same time, the AMD64 655 * processor appears to deliver as many NMIs as there are 656 * outstanding PMC interrupts. So we process only one NMI 657 * interrupt at a time. 658 */ 659 660 for (i = 0; retval == 0 && i < AMD_NPMCS; i++) { 661 662 if ((pm = pac->pc_amdpmcs[i].phw_pmc) == NULL || 663 !PMC_IS_SAMPLING_MODE(PMC_TO_MODE(pm))) { 664 continue; 665 } 666 667 if (!AMD_PMC_HAS_OVERFLOWED(i)) 668 continue; 669 670 retval = 1; /* Found an interrupting PMC. */ 671 672 if (pm->pm_state != PMC_STATE_RUNNING) 673 continue; 674 675 /* Stop the PMC, reload count. */ 676 evsel = AMD_PMC_EVSEL_0 + i; 677 perfctr = AMD_PMC_PERFCTR_0 + i; 678 v = pm->pm_sc.pm_reloadcount; 679 config = rdmsr(evsel); 680 681 KASSERT((config & ~AMD_PMC_ENABLE) == 682 (pm->pm_md.pm_amd.pm_amd_evsel & ~AMD_PMC_ENABLE), 683 ("[amd,%d] config mismatch reg=0x%x pm=0x%x", __LINE__, 684 config, pm->pm_md.pm_amd.pm_amd_evsel)); 685 686 wrmsr(evsel, config & ~AMD_PMC_ENABLE); 687 wrmsr(perfctr, AMD_RELOAD_COUNT_TO_PERFCTR_VALUE(v)); 688 689 /* Restart the counter if logging succeeded. */ 690 error = pmc_process_interrupt(cpu, pm, tf, TRAPF_USERMODE(tf)); 691 if (error == 0) 692 wrmsr(evsel, config | AMD_PMC_ENABLE); 693 } 694 695 atomic_add_int(retval ? &pmc_stats.pm_intr_processed : 696 &pmc_stats.pm_intr_ignored, 1); 697 698 return (retval); 699 } 700 701 /* 702 * describe a PMC 703 */ 704 static int 705 amd_describe(int cpu, int ri, struct pmc_info *pi, struct pmc **ppmc) 706 { 707 int error; 708 size_t copied; 709 const struct amd_descr *pd; 710 struct pmc_hw *phw; 711 712 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 713 ("[amd,%d] illegal CPU %d", __LINE__, cpu)); 714 KASSERT(ri >= 0 && ri < AMD_NPMCS, 715 ("[amd,%d] row-index %d out of range", __LINE__, ri)); 716 717 phw = &amd_pcpu[cpu]->pc_amdpmcs[ri]; 718 pd = &amd_pmcdesc[ri]; 719 720 if ((error = copystr(pd->pm_descr.pd_name, pi->pm_name, 721 PMC_NAME_MAX, &copied)) != 0) 722 return error; 723 724 pi->pm_class = pd->pm_descr.pd_class; 725 726 if (phw->phw_state & PMC_PHW_FLAG_IS_ENABLED) { 727 pi->pm_enabled = TRUE; 728 *ppmc = phw->phw_pmc; 729 } else { 730 pi->pm_enabled = FALSE; 731 *ppmc = NULL; 732 } 733 734 return 0; 735 } 736 737 /* 738 * i386 specific entry points 739 */ 740 741 /* 742 * return the MSR address of the given PMC. 743 */ 744 745 static int 746 amd_get_msr(int ri, uint32_t *msr) 747 { 748 KASSERT(ri >= 0 && ri < AMD_NPMCS, 749 ("[amd,%d] ri %d out of range", __LINE__, ri)); 750 751 *msr = amd_pmcdesc[ri].pm_perfctr - AMD_PMC_PERFCTR_0; 752 753 return (0); 754 } 755 756 /* 757 * processor dependent initialization. 758 */ 759 760 static int 761 amd_pcpu_init(struct pmc_mdep *md, int cpu) 762 { 763 int classindex, first_ri, n; 764 struct pmc_cpu *pc; 765 struct amd_cpu *pac; 766 struct pmc_hw *phw; 767 768 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 769 ("[amd,%d] insane cpu number %d", __LINE__, cpu)); 770 771 PMCDBG(MDP,INI,1,"amd-init cpu=%d", cpu); 772 773 amd_pcpu[cpu] = pac = malloc(sizeof(struct amd_cpu), M_PMC, 774 M_WAITOK|M_ZERO); 775 776 /* 777 * Set the content of the hardware descriptors to a known 778 * state and initialize pointers in the MI per-cpu descriptor. 779 */ 780 pc = pmc_pcpu[cpu]; 781 #if defined(__amd64__) 782 classindex = PMC_MDEP_CLASS_INDEX_K8; 783 #elif defined(__i386__) 784 classindex = md->pmd_cputype == PMC_CPU_AMD_K8 ? 785 PMC_MDEP_CLASS_INDEX_K8 : PMC_MDEP_CLASS_INDEX_K7; 786 #endif 787 first_ri = md->pmd_classdep[classindex].pcd_ri; 788 789 KASSERT(pc != NULL, ("[amd,%d] NULL per-cpu pointer", __LINE__)); 790 791 for (n = 0, phw = pac->pc_amdpmcs; n < AMD_NPMCS; n++, phw++) { 792 phw->phw_state = PMC_PHW_FLAG_IS_ENABLED | 793 PMC_PHW_CPU_TO_STATE(cpu) | PMC_PHW_INDEX_TO_STATE(n); 794 phw->phw_pmc = NULL; 795 pc->pc_hwpmcs[n + first_ri] = phw; 796 } 797 798 return (0); 799 } 800 801 802 /* 803 * processor dependent cleanup prior to the KLD 804 * being unloaded 805 */ 806 807 static int 808 amd_pcpu_fini(struct pmc_mdep *md, int cpu) 809 { 810 int classindex, first_ri, i; 811 uint32_t evsel; 812 struct pmc_cpu *pc; 813 struct amd_cpu *pac; 814 815 KASSERT(cpu >= 0 && cpu < pmc_cpu_max(), 816 ("[amd,%d] insane cpu number (%d)", __LINE__, cpu)); 817 818 PMCDBG(MDP,INI,1,"amd-cleanup cpu=%d", cpu); 819 820 /* 821 * First, turn off all PMCs on this CPU. 822 */ 823 for (i = 0; i < 4; i++) { /* XXX this loop is now not needed */ 824 evsel = rdmsr(AMD_PMC_EVSEL_0 + i); 825 evsel &= ~AMD_PMC_ENABLE; 826 wrmsr(AMD_PMC_EVSEL_0 + i, evsel); 827 } 828 829 /* 830 * Next, free up allocated space. 831 */ 832 if ((pac = amd_pcpu[cpu]) == NULL) 833 return (0); 834 835 amd_pcpu[cpu] = NULL; 836 837 #ifdef DEBUG 838 for (i = 0; i < AMD_NPMCS; i++) { 839 KASSERT(pac->pc_amdpmcs[i].phw_pmc == NULL, 840 ("[amd,%d] CPU%d/PMC%d in use", __LINE__, cpu, i)); 841 KASSERT(AMD_PMC_IS_STOPPED(AMD_PMC_EVSEL_0 + (i-1)), 842 ("[amd,%d] CPU%d/PMC%d not stopped", __LINE__, cpu, i)); 843 } 844 #endif 845 846 pc = pmc_pcpu[cpu]; 847 KASSERT(pc != NULL, ("[amd,%d] NULL per-cpu state", __LINE__)); 848 849 #if defined(__amd64__) 850 classindex = PMC_MDEP_CLASS_INDEX_K8; 851 #elif defined(__i386__) 852 classindex = md->pmd_cputype == PMC_CPU_AMD_K8 ? PMC_MDEP_CLASS_INDEX_K8 : 853 PMC_MDEP_CLASS_INDEX_K7; 854 #endif 855 first_ri = md->pmd_classdep[classindex].pcd_ri; 856 857 /* 858 * Reset pointers in the MI 'per-cpu' state. 859 */ 860 for (i = 0; i < AMD_NPMCS; i++) { 861 pc->pc_hwpmcs[i + first_ri] = NULL; 862 } 863 864 865 free(pac, M_PMC); 866 867 return (0); 868 } 869 870 /* 871 * Initialize ourselves. 872 */ 873 874 struct pmc_mdep * 875 pmc_amd_initialize(void) 876 { 877 int classindex, error, i, nclasses, ncpus; 878 struct pmc_classdep *pcd; 879 enum pmc_cputype cputype; 880 struct pmc_mdep *pmc_mdep; 881 enum pmc_class class; 882 char *name; 883 884 /* 885 * The presence of hardware performance counters on the AMD 886 * Athlon, Duron or later processors, is _not_ indicated by 887 * any of the processor feature flags set by the 'CPUID' 888 * instruction, so we only check the 'instruction family' 889 * field returned by CPUID for instruction family >= 6. 890 */ 891 892 class = cputype = -1; 893 name = NULL; 894 switch (cpu_id & 0xF00) { 895 #if defined(__i386__) 896 case 0x600: /* Athlon(tm) processor */ 897 classindex = PMC_MDEP_CLASS_INDEX_K7; 898 cputype = PMC_CPU_AMD_K7; 899 class = PMC_CLASS_K7; 900 name = "K7"; 901 break; 902 #endif 903 case 0xF00: /* Athlon64/Opteron processor */ 904 classindex = PMC_MDEP_CLASS_INDEX_K8; 905 cputype = PMC_CPU_AMD_K8; 906 class = PMC_CLASS_K8; 907 name = "K8"; 908 break; 909 } 910 911 if ((int) cputype == -1) { 912 (void) printf("pmc: Unknown AMD CPU.\n"); 913 return NULL; 914 } 915 916 #ifdef DEBUG 917 amd_pmc_class = class; 918 #endif 919 920 /* 921 * Allocate space for pointers to PMC HW descriptors and for 922 * the MDEP structure used by MI code. 923 */ 924 amd_pcpu = malloc(sizeof(struct amd_cpu *) * pmc_cpu_max(), M_PMC, 925 M_WAITOK|M_ZERO); 926 927 /* 928 * These processors have two classes of PMCs: the TSC and 929 * programmable PMCs. 930 */ 931 nclasses = 2; 932 pmc_mdep = malloc(sizeof(struct pmc_mdep) + nclasses * sizeof (struct pmc_classdep), 933 M_PMC, M_WAITOK|M_ZERO); 934 935 pmc_mdep->pmd_cputype = cputype; 936 pmc_mdep->pmd_nclass = nclasses; 937 938 ncpus = pmc_cpu_max(); 939 940 /* Initialize the TSC. */ 941 error = pmc_tsc_initialize(pmc_mdep, ncpus); 942 if (error) 943 goto error; 944 945 /* Initialize AMD K7 and K8 PMC handling. */ 946 pcd = &pmc_mdep->pmd_classdep[classindex]; 947 948 pcd->pcd_caps = AMD_PMC_CAPS; 949 pcd->pcd_class = class; 950 pcd->pcd_num = AMD_NPMCS; 951 pcd->pcd_ri = pmc_mdep->pmd_npmc; 952 pcd->pcd_width = 48; 953 954 /* fill in the correct pmc name and class */ 955 for (i = 0; i < AMD_NPMCS; i++) { 956 (void) snprintf(amd_pmcdesc[i].pm_descr.pd_name, 957 sizeof(amd_pmcdesc[i].pm_descr.pd_name), "%s-%d", 958 name, i); 959 amd_pmcdesc[i].pm_descr.pd_class = class; 960 } 961 962 pcd->pcd_allocate_pmc = amd_allocate_pmc; 963 pcd->pcd_config_pmc = amd_config_pmc; 964 pcd->pcd_describe = amd_describe; 965 pcd->pcd_get_config = amd_get_config; 966 pcd->pcd_get_msr = amd_get_msr; 967 pcd->pcd_pcpu_fini = amd_pcpu_fini; 968 pcd->pcd_pcpu_init = amd_pcpu_init; 969 pcd->pcd_read_pmc = amd_read_pmc; 970 pcd->pcd_release_pmc = amd_release_pmc; 971 pcd->pcd_start_pmc = amd_start_pmc; 972 pcd->pcd_stop_pmc = amd_stop_pmc; 973 pcd->pcd_write_pmc = amd_write_pmc; 974 975 pmc_mdep->pmd_pcpu_init = NULL; 976 pmc_mdep->pmd_pcpu_fini = NULL; 977 pmc_mdep->pmd_intr = amd_intr; 978 pmc_mdep->pmd_switch_in = amd_switch_in; 979 pmc_mdep->pmd_switch_out = amd_switch_out; 980 981 pmc_mdep->pmd_npmc += AMD_NPMCS; 982 983 PMCDBG(MDP,INI,0,"%s","amd-initialize"); 984 985 return (pmc_mdep); 986 987 error: 988 if (error) { 989 free(pmc_mdep, M_PMC); 990 pmc_mdep = NULL; 991 } 992 993 return (NULL); 994 } 995 996 /* 997 * Finalization code for AMD CPUs. 998 */ 999 1000 void 1001 pmc_amd_finalize(struct pmc_mdep *md) 1002 { 1003 #if defined(INVARIANTS) 1004 int classindex, i, ncpus, pmcclass; 1005 #endif 1006 1007 pmc_tsc_finalize(md); 1008 1009 KASSERT(amd_pcpu != NULL, ("[amd,%d] NULL per-cpu array pointer", 1010 __LINE__)); 1011 1012 #if defined(INVARIANTS) 1013 switch (md->pmd_cputype) { 1014 #if defined(__i386__) 1015 case PMC_CPU_AMD_K7: 1016 classindex = PMC_MDEP_CLASS_INDEX_K7; 1017 pmcclass = PMC_CLASS_K7; 1018 break; 1019 #endif 1020 default: 1021 classindex = PMC_MDEP_CLASS_INDEX_K8; 1022 pmcclass = PMC_CLASS_K8; 1023 } 1024 1025 KASSERT(md->pmd_classdep[classindex].pcd_class == pmcclass, 1026 ("[amd,%d] pmc class mismatch", __LINE__)); 1027 1028 ncpus = pmc_cpu_max(); 1029 1030 for (i = 0; i < ncpus; i++) 1031 KASSERT(amd_pcpu[i] == NULL, ("[amd,%d] non-null pcpu", 1032 __LINE__)); 1033 #endif 1034 1035 free(amd_pcpu, M_PMC); 1036 amd_pcpu = NULL; 1037 }
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