1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * intel_pt_pkt_decoder.c: Intel Processor Trace support 4 * Copyright (c) 2013-2014, Intel Corporation. 5 */ 6 7 #include <stdio.h> 8 #include <string.h> 9 #include <endian.h> 10 #include <byteswap.h> 11 #include <linux/kernel.h> 12 #include <linux/compiler.h> 13 #include <linux/unaligned.h> 14 15 #include "intel-pt-pkt-decoder.h" 16 17 #define BIT(n) (1 << (n)) 18 19 #define BIT63 ((uint64_t)1 << 63) 20 21 #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 22 #define memcpy_le64(d, s, n) do { \ 23 memcpy((d), (s), (n)); \ 24 *(d) = le64_to_cpu(*(d)); \ 25 } while (0) 26 #else 27 #define memcpy_le64 memcpy 28 #endif 29 30 static const char * const packet_name[] = { 31 [INTEL_PT_BAD] = "Bad Packet!", 32 [INTEL_PT_PAD] = "PAD", 33 [INTEL_PT_TNT] = "TNT", 34 [INTEL_PT_TIP_PGD] = "TIP.PGD", 35 [INTEL_PT_TIP_PGE] = "TIP.PGE", 36 [INTEL_PT_TSC] = "TSC", 37 [INTEL_PT_TMA] = "TMA", 38 [INTEL_PT_MODE_EXEC] = "MODE.Exec", 39 [INTEL_PT_MODE_TSX] = "MODE.TSX", 40 [INTEL_PT_MTC] = "MTC", 41 [INTEL_PT_TIP] = "TIP", 42 [INTEL_PT_FUP] = "FUP", 43 [INTEL_PT_CYC] = "CYC", 44 [INTEL_PT_VMCS] = "VMCS", 45 [INTEL_PT_PSB] = "PSB", 46 [INTEL_PT_PSBEND] = "PSBEND", 47 [INTEL_PT_CBR] = "CBR", 48 [INTEL_PT_TRACESTOP] = "TraceSTOP", 49 [INTEL_PT_PIP] = "PIP", 50 [INTEL_PT_OVF] = "OVF", 51 [INTEL_PT_MNT] = "MNT", 52 [INTEL_PT_PTWRITE] = "PTWRITE", 53 [INTEL_PT_PTWRITE_IP] = "PTWRITE", 54 [INTEL_PT_EXSTOP] = "EXSTOP", 55 [INTEL_PT_EXSTOP_IP] = "EXSTOP", 56 [INTEL_PT_MWAIT] = "MWAIT", 57 [INTEL_PT_PWRE] = "PWRE", 58 [INTEL_PT_PWRX] = "PWRX", 59 [INTEL_PT_BBP] = "BBP", 60 [INTEL_PT_BIP] = "BIP", 61 [INTEL_PT_BEP] = "BEP", 62 [INTEL_PT_BEP_IP] = "BEP", 63 [INTEL_PT_CFE] = "CFE", 64 [INTEL_PT_CFE_IP] = "CFE", 65 [INTEL_PT_EVD] = "EVD", 66 }; 67 68 const char *intel_pt_pkt_name(enum intel_pt_pkt_type type) 69 { 70 return packet_name[type]; 71 } 72 73 static int intel_pt_get_long_tnt(const unsigned char *buf, size_t len, 74 struct intel_pt_pkt *packet) 75 { 76 uint64_t payload; 77 int count; 78 79 if (len < 8) 80 return INTEL_PT_NEED_MORE_BYTES; 81 82 payload = get_unaligned_le64(buf); 83 84 for (count = 47; count; count--) { 85 if (payload & BIT63) 86 break; 87 payload <<= 1; 88 } 89 90 packet->type = INTEL_PT_TNT; 91 packet->count = count; 92 packet->payload = payload << 1; 93 return 8; 94 } 95 96 static int intel_pt_get_pip(const unsigned char *buf, size_t len, 97 struct intel_pt_pkt *packet) 98 { 99 uint64_t payload = 0; 100 101 if (len < 8) 102 return INTEL_PT_NEED_MORE_BYTES; 103 104 packet->type = INTEL_PT_PIP; 105 memcpy_le64(&payload, buf + 2, 6); 106 packet->payload = payload; 107 108 return 8; 109 } 110 111 static int intel_pt_get_tracestop(struct intel_pt_pkt *packet) 112 { 113 packet->type = INTEL_PT_TRACESTOP; 114 return 2; 115 } 116 117 static int intel_pt_get_cbr(const unsigned char *buf, size_t len, 118 struct intel_pt_pkt *packet) 119 { 120 if (len < 4) 121 return INTEL_PT_NEED_MORE_BYTES; 122 packet->type = INTEL_PT_CBR; 123 packet->payload = get_unaligned_le16(buf + 2); 124 return 4; 125 } 126 127 static int intel_pt_get_vmcs(const unsigned char *buf, size_t len, 128 struct intel_pt_pkt *packet) 129 { 130 if (len < 7) 131 return INTEL_PT_NEED_MORE_BYTES; 132 133 packet->type = INTEL_PT_VMCS; 134 packet->count = 5; 135 memcpy_le64(&packet->payload, buf + 2, 5); 136 137 return 7; 138 } 139 140 static int intel_pt_get_ovf(struct intel_pt_pkt *packet) 141 { 142 packet->type = INTEL_PT_OVF; 143 return 2; 144 } 145 146 static int intel_pt_get_psb(const unsigned char *buf, size_t len, 147 struct intel_pt_pkt *packet) 148 { 149 int i; 150 151 if (len < 16) 152 return INTEL_PT_NEED_MORE_BYTES; 153 154 for (i = 2; i < 16; i += 2) { 155 if (buf[i] != 2 || buf[i + 1] != 0x82) 156 return INTEL_PT_BAD_PACKET; 157 } 158 159 packet->type = INTEL_PT_PSB; 160 return 16; 161 } 162 163 static int intel_pt_get_psbend(struct intel_pt_pkt *packet) 164 { 165 packet->type = INTEL_PT_PSBEND; 166 return 2; 167 } 168 169 static int intel_pt_get_tma(const unsigned char *buf, size_t len, 170 struct intel_pt_pkt *packet) 171 { 172 if (len < 7) 173 return INTEL_PT_NEED_MORE_BYTES; 174 175 packet->type = INTEL_PT_TMA; 176 packet->payload = buf[2] | (buf[3] << 8); 177 packet->count = buf[5] | ((buf[6] & BIT(0)) << 8); 178 return 7; 179 } 180 181 static int intel_pt_get_pad(struct intel_pt_pkt *packet) 182 { 183 packet->type = INTEL_PT_PAD; 184 return 1; 185 } 186 187 static int intel_pt_get_mnt(const unsigned char *buf, size_t len, 188 struct intel_pt_pkt *packet) 189 { 190 if (len < 11) 191 return INTEL_PT_NEED_MORE_BYTES; 192 packet->type = INTEL_PT_MNT; 193 packet->payload = get_unaligned_le64(buf + 3); 194 return 11; 195 } 196 197 static int intel_pt_get_3byte(const unsigned char *buf, size_t len, 198 struct intel_pt_pkt *packet) 199 { 200 if (len < 3) 201 return INTEL_PT_NEED_MORE_BYTES; 202 203 switch (buf[2]) { 204 case 0x88: /* MNT */ 205 return intel_pt_get_mnt(buf, len, packet); 206 default: 207 return INTEL_PT_BAD_PACKET; 208 } 209 } 210 211 static int intel_pt_get_ptwrite(const unsigned char *buf, size_t len, 212 struct intel_pt_pkt *packet) 213 { 214 packet->count = (buf[1] >> 5) & 0x3; 215 packet->type = buf[1] & BIT(7) ? INTEL_PT_PTWRITE_IP : 216 INTEL_PT_PTWRITE; 217 218 switch (packet->count) { 219 case 0: 220 if (len < 6) 221 return INTEL_PT_NEED_MORE_BYTES; 222 packet->payload = get_unaligned_le32(buf + 2); 223 return 6; 224 case 1: 225 if (len < 10) 226 return INTEL_PT_NEED_MORE_BYTES; 227 packet->payload = get_unaligned_le64(buf + 2); 228 return 10; 229 default: 230 return INTEL_PT_BAD_PACKET; 231 } 232 } 233 234 static int intel_pt_get_exstop(struct intel_pt_pkt *packet) 235 { 236 packet->type = INTEL_PT_EXSTOP; 237 return 2; 238 } 239 240 static int intel_pt_get_exstop_ip(struct intel_pt_pkt *packet) 241 { 242 packet->type = INTEL_PT_EXSTOP_IP; 243 return 2; 244 } 245 246 static int intel_pt_get_mwait(const unsigned char *buf, size_t len, 247 struct intel_pt_pkt *packet) 248 { 249 if (len < 10) 250 return INTEL_PT_NEED_MORE_BYTES; 251 packet->type = INTEL_PT_MWAIT; 252 packet->payload = get_unaligned_le64(buf + 2); 253 return 10; 254 } 255 256 static int intel_pt_get_pwre(const unsigned char *buf, size_t len, 257 struct intel_pt_pkt *packet) 258 { 259 if (len < 4) 260 return INTEL_PT_NEED_MORE_BYTES; 261 packet->type = INTEL_PT_PWRE; 262 memcpy_le64(&packet->payload, buf + 2, 2); 263 return 4; 264 } 265 266 static int intel_pt_get_pwrx(const unsigned char *buf, size_t len, 267 struct intel_pt_pkt *packet) 268 { 269 if (len < 7) 270 return INTEL_PT_NEED_MORE_BYTES; 271 packet->type = INTEL_PT_PWRX; 272 memcpy_le64(&packet->payload, buf + 2, 5); 273 return 7; 274 } 275 276 static int intel_pt_get_bbp(const unsigned char *buf, size_t len, 277 struct intel_pt_pkt *packet) 278 { 279 if (len < 3) 280 return INTEL_PT_NEED_MORE_BYTES; 281 packet->type = INTEL_PT_BBP; 282 packet->count = buf[2] >> 7; 283 packet->payload = buf[2] & 0x1f; 284 return 3; 285 } 286 287 static int intel_pt_get_bip_4(const unsigned char *buf, size_t len, 288 struct intel_pt_pkt *packet) 289 { 290 if (len < 5) 291 return INTEL_PT_NEED_MORE_BYTES; 292 packet->type = INTEL_PT_BIP; 293 packet->count = buf[0] >> 3; 294 memcpy_le64(&packet->payload, buf + 1, 4); 295 return 5; 296 } 297 298 static int intel_pt_get_bip_8(const unsigned char *buf, size_t len, 299 struct intel_pt_pkt *packet) 300 { 301 if (len < 9) 302 return INTEL_PT_NEED_MORE_BYTES; 303 packet->type = INTEL_PT_BIP; 304 packet->count = buf[0] >> 3; 305 packet->payload = get_unaligned_le64(buf + 1); 306 return 9; 307 } 308 309 static int intel_pt_get_bep(size_t len, struct intel_pt_pkt *packet) 310 { 311 if (len < 2) 312 return INTEL_PT_NEED_MORE_BYTES; 313 packet->type = INTEL_PT_BEP; 314 return 2; 315 } 316 317 static int intel_pt_get_bep_ip(size_t len, struct intel_pt_pkt *packet) 318 { 319 if (len < 2) 320 return INTEL_PT_NEED_MORE_BYTES; 321 packet->type = INTEL_PT_BEP_IP; 322 return 2; 323 } 324 325 static int intel_pt_get_cfe(const unsigned char *buf, size_t len, 326 struct intel_pt_pkt *packet) 327 { 328 if (len < 4) 329 return INTEL_PT_NEED_MORE_BYTES; 330 packet->type = buf[2] & 0x80 ? INTEL_PT_CFE_IP : INTEL_PT_CFE; 331 packet->count = buf[2] & 0x1f; 332 packet->payload = buf[3]; 333 return 4; 334 } 335 336 static int intel_pt_get_evd(const unsigned char *buf, size_t len, 337 struct intel_pt_pkt *packet) 338 { 339 if (len < 11) 340 return INTEL_PT_NEED_MORE_BYTES; 341 packet->type = INTEL_PT_EVD; 342 packet->count = buf[2] & 0x3f; 343 packet->payload = buf[3]; 344 packet->payload = get_unaligned_le64(buf + 3); 345 return 11; 346 } 347 348 static int intel_pt_get_ext(const unsigned char *buf, size_t len, 349 struct intel_pt_pkt *packet) 350 { 351 if (len < 2) 352 return INTEL_PT_NEED_MORE_BYTES; 353 354 if ((buf[1] & 0x1f) == 0x12) 355 return intel_pt_get_ptwrite(buf, len, packet); 356 357 switch (buf[1]) { 358 case 0xa3: /* Long TNT */ 359 return intel_pt_get_long_tnt(buf, len, packet); 360 case 0x43: /* PIP */ 361 return intel_pt_get_pip(buf, len, packet); 362 case 0x83: /* TraceStop */ 363 return intel_pt_get_tracestop(packet); 364 case 0x03: /* CBR */ 365 return intel_pt_get_cbr(buf, len, packet); 366 case 0xc8: /* VMCS */ 367 return intel_pt_get_vmcs(buf, len, packet); 368 case 0xf3: /* OVF */ 369 return intel_pt_get_ovf(packet); 370 case 0x82: /* PSB */ 371 return intel_pt_get_psb(buf, len, packet); 372 case 0x23: /* PSBEND */ 373 return intel_pt_get_psbend(packet); 374 case 0x73: /* TMA */ 375 return intel_pt_get_tma(buf, len, packet); 376 case 0xC3: /* 3-byte header */ 377 return intel_pt_get_3byte(buf, len, packet); 378 case 0x62: /* EXSTOP no IP */ 379 return intel_pt_get_exstop(packet); 380 case 0xE2: /* EXSTOP with IP */ 381 return intel_pt_get_exstop_ip(packet); 382 case 0xC2: /* MWAIT */ 383 return intel_pt_get_mwait(buf, len, packet); 384 case 0x22: /* PWRE */ 385 return intel_pt_get_pwre(buf, len, packet); 386 case 0xA2: /* PWRX */ 387 return intel_pt_get_pwrx(buf, len, packet); 388 case 0x63: /* BBP */ 389 return intel_pt_get_bbp(buf, len, packet); 390 case 0x33: /* BEP no IP */ 391 return intel_pt_get_bep(len, packet); 392 case 0xb3: /* BEP with IP */ 393 return intel_pt_get_bep_ip(len, packet); 394 case 0x13: /* CFE */ 395 return intel_pt_get_cfe(buf, len, packet); 396 case 0x53: /* EVD */ 397 return intel_pt_get_evd(buf, len, packet); 398 default: 399 return INTEL_PT_BAD_PACKET; 400 } 401 } 402 403 static int intel_pt_get_short_tnt(unsigned int byte, 404 struct intel_pt_pkt *packet) 405 { 406 int count; 407 408 for (count = 6; count; count--) { 409 if (byte & BIT(7)) 410 break; 411 byte <<= 1; 412 } 413 414 packet->type = INTEL_PT_TNT; 415 packet->count = count; 416 packet->payload = (uint64_t)byte << 57; 417 418 return 1; 419 } 420 421 static int intel_pt_get_cyc(unsigned int byte, const unsigned char *buf, 422 size_t len, struct intel_pt_pkt *packet) 423 { 424 unsigned int offs = 1, shift; 425 uint64_t payload = byte >> 3; 426 427 byte >>= 2; 428 len -= 1; 429 for (shift = 5; byte & 1; shift += 7) { 430 if (offs > 9) 431 return INTEL_PT_BAD_PACKET; 432 if (len < offs) 433 return INTEL_PT_NEED_MORE_BYTES; 434 byte = buf[offs++]; 435 payload |= ((uint64_t)byte >> 1) << shift; 436 } 437 438 packet->type = INTEL_PT_CYC; 439 packet->payload = payload; 440 return offs; 441 } 442 443 static int intel_pt_get_ip(enum intel_pt_pkt_type type, unsigned int byte, 444 const unsigned char *buf, size_t len, 445 struct intel_pt_pkt *packet) 446 { 447 int ip_len; 448 449 packet->count = byte >> 5; 450 451 switch (packet->count) { 452 case 0: 453 ip_len = 0; 454 break; 455 case 1: 456 if (len < 3) 457 return INTEL_PT_NEED_MORE_BYTES; 458 ip_len = 2; 459 packet->payload = get_unaligned_le16(buf + 1); 460 break; 461 case 2: 462 if (len < 5) 463 return INTEL_PT_NEED_MORE_BYTES; 464 ip_len = 4; 465 packet->payload = get_unaligned_le32(buf + 1); 466 break; 467 case 3: 468 case 4: 469 if (len < 7) 470 return INTEL_PT_NEED_MORE_BYTES; 471 ip_len = 6; 472 memcpy_le64(&packet->payload, buf + 1, 6); 473 break; 474 case 6: 475 if (len < 9) 476 return INTEL_PT_NEED_MORE_BYTES; 477 ip_len = 8; 478 packet->payload = get_unaligned_le64(buf + 1); 479 break; 480 default: 481 return INTEL_PT_BAD_PACKET; 482 } 483 484 packet->type = type; 485 486 return ip_len + 1; 487 } 488 489 static int intel_pt_get_mode(const unsigned char *buf, size_t len, 490 struct intel_pt_pkt *packet) 491 { 492 if (len < 2) 493 return INTEL_PT_NEED_MORE_BYTES; 494 495 switch (buf[1] >> 5) { 496 case 0: 497 packet->type = INTEL_PT_MODE_EXEC; 498 packet->count = buf[1]; 499 switch (buf[1] & 3) { 500 case 0: 501 packet->payload = 16; 502 break; 503 case 1: 504 packet->payload = 64; 505 break; 506 case 2: 507 packet->payload = 32; 508 break; 509 default: 510 return INTEL_PT_BAD_PACKET; 511 } 512 break; 513 case 1: 514 packet->type = INTEL_PT_MODE_TSX; 515 if ((buf[1] & 3) == 3) 516 return INTEL_PT_BAD_PACKET; 517 packet->payload = buf[1] & 3; 518 break; 519 default: 520 return INTEL_PT_BAD_PACKET; 521 } 522 523 return 2; 524 } 525 526 static int intel_pt_get_tsc(const unsigned char *buf, size_t len, 527 struct intel_pt_pkt *packet) 528 { 529 if (len < 8) 530 return INTEL_PT_NEED_MORE_BYTES; 531 packet->type = INTEL_PT_TSC; 532 memcpy_le64(&packet->payload, buf + 1, 7); 533 return 8; 534 } 535 536 static int intel_pt_get_mtc(const unsigned char *buf, size_t len, 537 struct intel_pt_pkt *packet) 538 { 539 if (len < 2) 540 return INTEL_PT_NEED_MORE_BYTES; 541 packet->type = INTEL_PT_MTC; 542 packet->payload = buf[1]; 543 return 2; 544 } 545 546 static int intel_pt_do_get_packet(const unsigned char *buf, size_t len, 547 struct intel_pt_pkt *packet, 548 enum intel_pt_pkt_ctx ctx) 549 { 550 unsigned int byte; 551 552 memset(packet, 0, sizeof(struct intel_pt_pkt)); 553 554 if (!len) 555 return INTEL_PT_NEED_MORE_BYTES; 556 557 byte = buf[0]; 558 559 switch (ctx) { 560 case INTEL_PT_NO_CTX: 561 break; 562 case INTEL_PT_BLK_4_CTX: 563 if ((byte & 0x7) == 4) 564 return intel_pt_get_bip_4(buf, len, packet); 565 break; 566 case INTEL_PT_BLK_8_CTX: 567 if ((byte & 0x7) == 4) 568 return intel_pt_get_bip_8(buf, len, packet); 569 break; 570 default: 571 break; 572 } 573 574 if (!(byte & BIT(0))) { 575 if (byte == 0) 576 return intel_pt_get_pad(packet); 577 if (byte == 2) 578 return intel_pt_get_ext(buf, len, packet); 579 return intel_pt_get_short_tnt(byte, packet); 580 } 581 582 if ((byte & 2)) 583 return intel_pt_get_cyc(byte, buf, len, packet); 584 585 switch (byte & 0x1f) { 586 case 0x0D: 587 return intel_pt_get_ip(INTEL_PT_TIP, byte, buf, len, packet); 588 case 0x11: 589 return intel_pt_get_ip(INTEL_PT_TIP_PGE, byte, buf, len, 590 packet); 591 case 0x01: 592 return intel_pt_get_ip(INTEL_PT_TIP_PGD, byte, buf, len, 593 packet); 594 case 0x1D: 595 return intel_pt_get_ip(INTEL_PT_FUP, byte, buf, len, packet); 596 case 0x19: 597 switch (byte) { 598 case 0x99: 599 return intel_pt_get_mode(buf, len, packet); 600 case 0x19: 601 return intel_pt_get_tsc(buf, len, packet); 602 case 0x59: 603 return intel_pt_get_mtc(buf, len, packet); 604 default: 605 return INTEL_PT_BAD_PACKET; 606 } 607 default: 608 return INTEL_PT_BAD_PACKET; 609 } 610 } 611 612 void intel_pt_upd_pkt_ctx(const struct intel_pt_pkt *packet, 613 enum intel_pt_pkt_ctx *ctx) 614 { 615 switch (packet->type) { 616 case INTEL_PT_BAD: 617 case INTEL_PT_PAD: 618 case INTEL_PT_TSC: 619 case INTEL_PT_TMA: 620 case INTEL_PT_MTC: 621 case INTEL_PT_FUP: 622 case INTEL_PT_CYC: 623 case INTEL_PT_CBR: 624 case INTEL_PT_MNT: 625 case INTEL_PT_EXSTOP: 626 case INTEL_PT_EXSTOP_IP: 627 case INTEL_PT_PWRE: 628 case INTEL_PT_PWRX: 629 case INTEL_PT_BIP: 630 break; 631 case INTEL_PT_TNT: 632 case INTEL_PT_TIP: 633 case INTEL_PT_TIP_PGD: 634 case INTEL_PT_TIP_PGE: 635 case INTEL_PT_MODE_EXEC: 636 case INTEL_PT_MODE_TSX: 637 case INTEL_PT_PIP: 638 case INTEL_PT_OVF: 639 case INTEL_PT_VMCS: 640 case INTEL_PT_TRACESTOP: 641 case INTEL_PT_PSB: 642 case INTEL_PT_PSBEND: 643 case INTEL_PT_PTWRITE: 644 case INTEL_PT_PTWRITE_IP: 645 case INTEL_PT_MWAIT: 646 case INTEL_PT_BEP: 647 case INTEL_PT_BEP_IP: 648 case INTEL_PT_CFE: 649 case INTEL_PT_CFE_IP: 650 case INTEL_PT_EVD: 651 *ctx = INTEL_PT_NO_CTX; 652 break; 653 case INTEL_PT_BBP: 654 if (packet->count) 655 *ctx = INTEL_PT_BLK_4_CTX; 656 else 657 *ctx = INTEL_PT_BLK_8_CTX; 658 break; 659 default: 660 break; 661 } 662 } 663 664 int intel_pt_get_packet(const unsigned char *buf, size_t len, 665 struct intel_pt_pkt *packet, enum intel_pt_pkt_ctx *ctx) 666 { 667 int ret; 668 669 ret = intel_pt_do_get_packet(buf, len, packet, *ctx); 670 if (ret > 0) { 671 while (ret < 8 && len > (size_t)ret && !buf[ret]) 672 ret += 1; 673 intel_pt_upd_pkt_ctx(packet, ctx); 674 } 675 return ret; 676 } 677 678 int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf, 679 size_t buf_len) 680 { 681 int ret, i, nr; 682 unsigned long long payload = packet->payload; 683 const char *name = intel_pt_pkt_name(packet->type); 684 685 switch (packet->type) { 686 case INTEL_PT_BAD: 687 case INTEL_PT_PAD: 688 case INTEL_PT_PSB: 689 case INTEL_PT_PSBEND: 690 case INTEL_PT_TRACESTOP: 691 case INTEL_PT_OVF: 692 return snprintf(buf, buf_len, "%s", name); 693 case INTEL_PT_TNT: { 694 size_t blen = buf_len; 695 696 ret = snprintf(buf, blen, "%s ", name); 697 if (ret < 0) 698 return ret; 699 buf += ret; 700 blen -= ret; 701 for (i = 0; i < packet->count; i++) { 702 if (payload & BIT63) 703 ret = snprintf(buf, blen, "T"); 704 else 705 ret = snprintf(buf, blen, "N"); 706 if (ret < 0) 707 return ret; 708 buf += ret; 709 blen -= ret; 710 payload <<= 1; 711 } 712 ret = snprintf(buf, blen, " (%d)", packet->count); 713 if (ret < 0) 714 return ret; 715 blen -= ret; 716 return buf_len - blen; 717 } 718 case INTEL_PT_TIP_PGD: 719 case INTEL_PT_TIP_PGE: 720 case INTEL_PT_TIP: 721 case INTEL_PT_FUP: 722 if (!(packet->count)) 723 return snprintf(buf, buf_len, "%s no ip", name); 724 fallthrough; 725 case INTEL_PT_CYC: 726 case INTEL_PT_VMCS: 727 case INTEL_PT_MTC: 728 case INTEL_PT_MNT: 729 case INTEL_PT_CBR: 730 case INTEL_PT_TSC: 731 return snprintf(buf, buf_len, "%s 0x%llx", name, payload); 732 case INTEL_PT_TMA: 733 return snprintf(buf, buf_len, "%s CTC 0x%x FC 0x%x", name, 734 (unsigned)payload, packet->count); 735 case INTEL_PT_MODE_EXEC: 736 return snprintf(buf, buf_len, "%s IF:%d %lld", 737 name, !!(packet->count & 4), payload); 738 case INTEL_PT_MODE_TSX: 739 return snprintf(buf, buf_len, "%s TXAbort:%u InTX:%u", 740 name, (unsigned)(payload >> 1) & 1, 741 (unsigned)payload & 1); 742 case INTEL_PT_PIP: 743 nr = packet->payload & INTEL_PT_VMX_NR_FLAG ? 1 : 0; 744 payload &= ~INTEL_PT_VMX_NR_FLAG; 745 ret = snprintf(buf, buf_len, "%s 0x%llx (NR=%d)", 746 name, payload >> 1, nr); 747 return ret; 748 case INTEL_PT_PTWRITE: 749 return snprintf(buf, buf_len, "%s 0x%llx IP:0", name, payload); 750 case INTEL_PT_PTWRITE_IP: 751 return snprintf(buf, buf_len, "%s 0x%llx IP:1", name, payload); 752 case INTEL_PT_BEP: 753 case INTEL_PT_EXSTOP: 754 return snprintf(buf, buf_len, "%s IP:0", name); 755 case INTEL_PT_BEP_IP: 756 case INTEL_PT_EXSTOP_IP: 757 return snprintf(buf, buf_len, "%s IP:1", name); 758 case INTEL_PT_MWAIT: 759 return snprintf(buf, buf_len, "%s 0x%llx Hints 0x%x Extensions 0x%x", 760 name, payload, (unsigned int)(payload & 0xff), 761 (unsigned int)((payload >> 32) & 0x3)); 762 case INTEL_PT_PWRE: 763 return snprintf(buf, buf_len, "%s 0x%llx HW:%u CState:%u Sub-CState:%u", 764 name, payload, !!(payload & 0x80), 765 (unsigned int)((payload >> 12) & 0xf), 766 (unsigned int)((payload >> 8) & 0xf)); 767 case INTEL_PT_PWRX: 768 return snprintf(buf, buf_len, "%s 0x%llx Last CState:%u Deepest CState:%u Wake Reason 0x%x", 769 name, payload, 770 (unsigned int)((payload >> 4) & 0xf), 771 (unsigned int)(payload & 0xf), 772 (unsigned int)((payload >> 8) & 0xf)); 773 case INTEL_PT_BBP: 774 return snprintf(buf, buf_len, "%s SZ %s-byte Type 0x%llx", 775 name, packet->count ? "4" : "8", payload); 776 case INTEL_PT_BIP: 777 return snprintf(buf, buf_len, "%s ID 0x%02x Value 0x%llx", 778 name, packet->count, payload); 779 case INTEL_PT_CFE: 780 case INTEL_PT_CFE_IP: 781 return snprintf(buf, buf_len, "%s IP:%d Type 0x%02x Vector 0x%llx", 782 name, packet->type == INTEL_PT_CFE_IP, packet->count, payload); 783 case INTEL_PT_EVD: 784 return snprintf(buf, buf_len, "%s Type 0x%02x Payload 0x%llx", 785 name, packet->count, payload); 786 default: 787 break; 788 } 789 return snprintf(buf, buf_len, "%s 0x%llx (%d)", 790 name, payload, packet->count); 791 } 792