util/inteltool/cpu.c

   1 /*
   2  * inteltool - dump all registers on an Intel CPU + chipset based system.
   3  *
   4  * Copyright (C) 2008 by coresystems GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <fcntl.h>
  21 #include <unistd.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <errno.h>
  26
  27 #include "inteltool.h"
  28
  29 int fd_msr;
  30
  31 unsigned int cpuid(unsigned int op)
  32 {
  33         unsigned int ret;
  34         unsigned int dummy2, dummy3, dummy4;
  35         asm volatile (
  36                 "cpuid"
  37                 : "=a" (ret), "=b" (dummy2), "=c" (dummy3), "=d" (dummy4)
  38                 : "a" (op)
  39         );
  40         return ret;
  41 }
  42
  43 int msr_readerror = 0;
  44
  45 msr_t rdmsr(int addr)
  46 {
  47         uint8_t buf[8];
  48         msr_t msr = { 0xffffffff, 0xffffffff };
  49
  50         if (lseek(fd_msr, (off_t) addr, SEEK_SET) == -1) {
  51                 perror("Could not lseek() to MSR");
  52                 close(fd_msr);
  53                 exit(1);
  54         }
  55
  56         if (read(fd_msr, buf, 8) == 8) {
  57                 msr.lo = *(uint32_t *)buf;
  58                 msr.hi = *(uint32_t *)(buf + 4);
  59
  60                 return msr;
  61         }
  62
  63         if (errno == 5) {
  64                 printf(" (*)"); // Not all bits of the MSR could be read
  65                 msr_readerror = 1;
  66         } else {
  67                 // A severe error.
  68                 perror("Could not read() MSR");
  69                 close(fd_msr);
  70                 exit(1);
  71         }
  72
  73         return msr;
  74 }
  75
  76 int print_intel_core_msrs(void)
  77 {
  78         unsigned int i, core, id;
  79         msr_t msr;
  80
  81 #define IA32_PLATFORM_ID                0x0017
  82 #define EBL_CR_POWERON                  0x002a
  83 #define FSB_CLK_STS                     0x00cd
  84 #define IA32_TIME_STAMP_COUNTER         0x0010
  85 #define IA32_APIC_BASE                  0x001b
  86
  87         typedef struct {
  88                 int number;
  89                 char *name;
  90         } msr_entry_t;
  91
  92         static const msr_entry_t model6ex_global_msrs[] = {
  93                 { 0x0017, "IA32_PLATFORM_ID" },
  94                 { 0x002a, "EBL_CR_POWERON" },
  95                 { 0x00cd, "FSB_CLOCK_STS" },
  96                 { 0x00ce, "FSB_CLOCK_VCC" },
  97                 { 0x00e2, "CLOCK_CST_CONFIG_CONTROL" },
  98                 { 0x00e3, "PMG_IO_BASE_ADDR" },
  99                 { 0x00e4, "PMG_IO_CAPTURE_ADDR" },
 100                 { 0x00ee, "EXT_CONFIG" },
 101                 { 0x011e, "BBL_CR_CTL3" },
 102                 { 0x0194, "CLOCK_FLEX_MAX" },
 103                 { 0x0198, "IA32_PERF_STATUS" },
 104                 { 0x01a0, "IA32_MISC_ENABLES" },
 105                 { 0x01aa, "PIC_SENS_CFG" },
 106                 { 0x0400, "IA32_MC0_CTL" },
 107                 { 0x0401, "IA32_MC0_STATUS" },
 108                 { 0x0402, "IA32_MC0_ADDR" },
 109                 //{ 0x0403, "IA32_MC0_MISC" }, // Seems to be RO
 110                 { 0x040c, "IA32_MC4_CTL" },
 111                 { 0x040d, "IA32_MC4_STATUS" },
 112                 { 0x040e, "IA32_MC4_ADDR" },
 113                 //{ 0x040f, "IA32_MC4_MISC" } // Seems to be RO
 114         };
 115
 116         static const msr_entry_t model6ex_per_core_msrs[] = {
 117                 { 0x0010, "IA32_TIME_STAMP_COUNTER" },
 118                 { 0x001b, "IA32_APIC_BASE" },
 119                 { 0x003a, "IA32_FEATURE_CONTROL" },
 120                 { 0x003f, "IA32_TEMPERATURE_OFFSET" },
 121                 //{ 0x0079, "IA32_BIOS_UPDT_TRIG" }, // Seems to be RO
 122                 { 0x008b, "IA32_BIOS_SIGN_ID" },
 123                 { 0x00e7, "IA32_MPERF" },
 124                 { 0x00e8, "IA32_APERF" },
 125                 { 0x00fe, "IA32_MTRRCAP" },
 126                 { 0x015f, "DTS_CAL_CTRL" },
 127                 { 0x0179, "IA32_MCG_CAP" },
 128                 { 0x017a, "IA32_MCG_STATUS" },
 129                 { 0x0199, "IA32_PERF_CONTROL" },
 130                 { 0x019a, "IA32_CLOCK_MODULATION" },
 131                 { 0x019b, "IA32_THERM_INTERRUPT" },
 132                 { 0x019c, "IA32_THERM_STATUS" },
 133                 { 0x019d, "GV_THERM" },
 134                 { 0x01d9, "IA32_DEBUGCTL" },
 135                 { 0x0200, "IA32_MTRR_PHYSBASE0" },
 136                 { 0x0201, "IA32_MTRR_PHYSMASK0" },
 137                 { 0x0202, "IA32_MTRR_PHYSBASE1" },
 138                 { 0x0203, "IA32_MTRR_PHYSMASK1" },
 139                 { 0x0204, "IA32_MTRR_PHYSBASE2" },
 140                 { 0x0205, "IA32_MTRR_PHYSMASK2" },
 141                 { 0x0206, "IA32_MTRR_PHYSBASE3" },
 142                 { 0x0207, "IA32_MTRR_PHYSMASK3" },
 143                 { 0x0208, "IA32_MTRR_PHYSBASE4" },
 144                 { 0x0209, "IA32_MTRR_PHYSMASK4" },
 145                 { 0x020a, "IA32_MTRR_PHYSBASE5" },
 146                 { 0x020b, "IA32_MTRR_PHYSMASK5" },
 147                 { 0x020c, "IA32_MTRR_PHYSBASE6" },
 148                 { 0x020d, "IA32_MTRR_PHYSMASK6" },
 149                 { 0x020e, "IA32_MTRR_PHYSBASE7" },
 150                 { 0x020f, "IA32_MTRR_PHYSMASK7" },
 151                 { 0x0250, "IA32_MTRR_FIX64K_00000" },
 152                 { 0x0258, "IA32_MTRR_FIX16K_80000" },
 153                 { 0x0259, "IA32_MTRR_FIX16K_A0000" },
 154                 { 0x0268, "IA32_MTRR_FIX4K_C0000" },
 155                 { 0x0269, "IA32_MTRR_FIX4K_C8000" },
 156                 { 0x026a, "IA32_MTRR_FIX4K_D0000" },
 157                 { 0x026b, "IA32_MTRR_FIX4K_D8000" },
 158                 { 0x026c, "IA32_MTRR_FIX4K_E0000" },
 159                 { 0x026d, "IA32_MTRR_FIX4K_E8000" },
 160                 { 0x026e, "IA32_MTRR_FIX4K_F0000" },
 161                 { 0x026f, "IA32_MTRR_FIX4K_F8000" },
 162                 { 0x02ff, "IA32_MTRR_DEF_TYPE" },
 163                 //{ 0x00c000080, "IA32_CR_EFER" }, // Seems to be RO
 164         };
 165
 166         static const msr_entry_t model6fx_global_msrs[] = {
 167                 { 0x0017, "IA32_PLATFORM_ID" },
 168                 { 0x002a, "EBL_CR_POWERON" },
 169                 { 0x003f, "IA32_TEMPERATURE_OFFSET" },
 170                 { 0x00a8, "EMTTM_CR_TABLE0" },
 171                 { 0x00a9, "EMTTM_CR_TABLE1" },
 172                 { 0x00aa, "EMTTM_CR_TABLE2" },
 173                 { 0x00ab, "EMTTM_CR_TABLE3" },
 174                 { 0x00ac, "EMTTM_CR_TABLE4" },
 175                 { 0x00ad, "EMTTM_CR_TABLE5" },
 176                 { 0x00cd, "FSB_CLOCK_STS" },
 177                 { 0x00e2, "PMG_CST_CONFIG_CONTROL" },
 178                 { 0x00e3, "PMG_IO_BASE_ADDR" },
 179                 { 0x00e4, "PMG_IO_CAPTURE_ADDR" },
 180                 { 0x00ee, "EXT_CONFIG" },
 181                 { 0x011e, "BBL_CR_CTL3" },
 182                 { 0x0194, "CLOCK_FLEX_MAX" },
 183                 { 0x0198, "IA32_PERF_STATUS" },
 184                 { 0x01a0, "IA32_MISC_ENABLES" },
 185                 { 0x01aa, "PIC_SENS_CFG" },
 186                 { 0x0400, "IA32_MC0_CTL" },
 187                 { 0x0401, "IA32_MC0_STATUS" },
 188                 { 0x0402, "IA32_MC0_ADDR" },
 189                 //{ 0x0403, "IA32_MC0_MISC" }, // Seems to be RO
 190                 { 0x040c, "IA32_MC4_CTL" },
 191                 { 0x040d, "IA32_MC4_STATUS" },
 192                 { 0x040e, "IA32_MC4_ADDR" },
 193                 //{ 0x040f, "IA32_MC4_MISC" } // Seems to be RO
 194         };
 195
 196         static const msr_entry_t model6fx_per_core_msrs[] = {
 197                 { 0x0010, "IA32_TIME_STAMP_COUNTER" },
 198                 { 0x001b, "IA32_APIC_BASE" },
 199                 { 0x003a, "IA32_FEATURE_CONTROL" },
 200                 //{ 0x0079, "IA32_BIOS_UPDT_TRIG" }, // Seems to be RO
 201                 { 0x008b, "IA32_BIOS_SIGN_ID" },
 202                 { 0x00e1, "SMM_CST_MISC_INFO" },
 203                 { 0x00e7, "IA32_MPERF" },
 204                 { 0x00e8, "IA32_APERF" },
 205                 { 0x00fe, "IA32_MTRRCAP" },
 206                 { 0x0179, "IA32_MCG_CAP" },
 207                 { 0x017a, "IA32_MCG_STATUS" },
 208                 { 0x0199, "IA32_PERF_CONTROL" },
 209                 { 0x019a, "IA32_THERM_CTL" },
 210                 { 0x019b, "IA32_THERM_INTERRUPT" },
 211                 { 0x019c, "IA32_THERM_STATUS" },
 212                 { 0x019d, "MSR_THERM2_CTL" },
 213                 { 0x01d9, "IA32_DEBUGCTL" },
 214                 { 0x0200, "IA32_MTRR_PHYSBASE0" },
 215                 { 0x0201, "IA32_MTRR_PHYSMASK0" },
 216                 { 0x0202, "IA32_MTRR_PHYSBASE1" },
 217                 { 0x0203, "IA32_MTRR_PHYSMASK1" },
 218                 { 0x0204, "IA32_MTRR_PHYSBASE2" },
 219                 { 0x0205, "IA32_MTRR_PHYSMASK2" },
 220                 { 0x0206, "IA32_MTRR_PHYSBASE3" },
 221                 { 0x0207, "IA32_MTRR_PHYSMASK3" },
 222                 { 0x0208, "IA32_MTRR_PHYSBASE4" },
 223                 { 0x0209, "IA32_MTRR_PHYSMASK4" },
 224                 { 0x020a, "IA32_MTRR_PHYSBASE5" },
 225                 { 0x020b, "IA32_MTRR_PHYSMASK5" },
 226                 { 0x020c, "IA32_MTRR_PHYSBASE6" },
 227                 { 0x020d, "IA32_MTRR_PHYSMASK6" },
 228                 { 0x020e, "IA32_MTRR_PHYSBASE7" },
 229                 { 0x020f, "IA32_MTRR_PHYSMASK7" },
 230                 { 0x0250, "IA32_MTRR_FIX64K_00000" },
 231                 { 0x0258, "IA32_MTRR_FIX16K_80000" },
 232                 { 0x0259, "IA32_MTRR_FIX16K_A0000" },
 233                 { 0x0268, "IA32_MTRR_FIX4K_C0000" },
 234                 { 0x0269, "IA32_MTRR_FIX4K_C8000" },
 235                 { 0x026a, "IA32_MTRR_FIX4K_D0000" },
 236                 { 0x026b, "IA32_MTRR_FIX4K_D8000" },
 237                 { 0x026c, "IA32_MTRR_FIX4K_E0000" },
 238                 { 0x026d, "IA32_MTRR_FIX4K_E8000" },
 239                 { 0x026e, "IA32_MTRR_FIX4K_F0000" },
 240                 { 0x026f, "IA32_MTRR_FIX4K_F8000" },
 241                 { 0x02ff, "IA32_MTRR_DEF_TYPE" },
 242                 //{ 0x00c000080, "IA32_CR_EFER" }, // Seems to be RO
 243         };
 244
 245         typedef struct {
 246                 unsigned int model;
 247                 const msr_entry_t *global_msrs;
 248                 unsigned int num_global_msrs;
 249                 const msr_entry_t *per_core_msrs;
 250                 unsigned int num_per_core_msrs;
 251         } cpu_t;
 252
 253         cpu_t cpulist[] = {
 254                 { 0x006e0, model6ex_global_msrs, ARRAY_SIZE(model6ex_global_msrs), model6ex_per_core_msrs, ARRAY_SIZE(model6ex_per_core_msrs) },
 255                 { 0x006f0, model6fx_global_msrs, ARRAY_SIZE(model6fx_global_msrs), model6fx_per_core_msrs, ARRAY_SIZE(model6fx_per_core_msrs) },
 256         };
 257
 258         cpu_t *cpu = NULL;
 259
 260         /* Get CPU family and model, not the stepping
 261          * (TODO: extended family/model)
 262          */
 263         id = cpuid(1) & 0xff0;
 264         for (i = 0; i < ARRAY_SIZE(cpulist); i++) {
 265                 if(cpulist[i].model == id) {
 266                         cpu = &cpulist[i];
 267                         break;
 268                 }
 269         }
 270
 271         if (!cpu) {
 272                 printf("Error: Dumping MSRs on this CPU (0x%06x) is not (yet) supported.\n", id);
 273                 return -1;
 274         }
 275
 276         fd_msr = open("/dev/cpu/0/msr", O_RDWR);
 277         if (fd_msr < 0) {
 278                 perror("Error while opening /dev/cpu/0/msr");
 279                 printf("Did you run 'modprobe msr'?\n");
 280                 return -1;
 281         }
 282
 283         printf("\n===================== SHARED MSRs (All Cores) =====================\n");
 284
 285         for (i = 0; i < cpu->num_global_msrs; i++) {
 286                 msr = rdmsr(cpu->global_msrs[i].number);
 287                 printf(" MSR 0x%08X = 0x%08X:0x%08X (%s)\n",
 288                        cpu->global_msrs[i].number, msr.hi, msr.lo,
 289                        cpu->global_msrs[i].name);
 290         }
 291
 292         close(fd_msr);
 293
 294         for (core = 0; core < 8; core++) {
 295                 char msrfilename[64];
 296                 memset(msrfilename, 0, 64);
 297                 sprintf(msrfilename, "/dev/cpu/%d/msr", core);
 298
 299                 fd_msr = open(msrfilename, O_RDWR);
 300
 301                 /* If the file is not there, we're probably through. No error,
 302                  * since we successfully opened /dev/cpu/0/msr before.
 303                  */
 304                 if (fd_msr < 0)
 305                         break;
 306
 307                 printf("\n====================== UNIQUE MSRs  (core %d) ======================\n", core);
 308
 309                 for (i = 0; i < cpu->num_per_core_msrs; i++) {
 310                         msr = rdmsr(cpu->per_core_msrs[i].number);
 311                         printf(" MSR 0x%08X = 0x%08X:0x%08X (%s)\n",
 312                                cpu->per_core_msrs[i].number, msr.hi, msr.lo,
 313                                cpu->per_core_msrs[i].name);
 314                 }
 315
 316                 close(fd_msr);
 317         }
 318
 319         if (msr_readerror)
 320                 printf("\n(*) Some MSRs could not be read. The marked values are unreliable.\n");
 321
 322         return 0;
 323 }
 324
 325