| 1 | /* $NetBSD: procfs_machdep.c,v 1.13 2016/08/08 09:39:06 msaitoh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2001 Wasabi Systems, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Written by Frank van der Linden and Jason R. Thorpe for |
| 8 | * Wasabi Systems, Inc. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. All advertising materials mentioning features or use of this software |
| 19 | * must display the following acknowledgement: |
| 20 | * This product includes software developed for the NetBSD Project by |
| 21 | * Wasabi Systems, Inc. |
| 22 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
| 23 | * or promote products derived from this software without specific prior |
| 24 | * written permission. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 28 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 29 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
| 30 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 31 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 32 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 33 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 34 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 35 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 36 | * POSSIBILITY OF SUCH DAMAGE. |
| 37 | */ |
| 38 | |
| 39 | /* |
| 40 | * NOTE: We simply use the primary CPU's cpuid_level and tsc_freq |
| 41 | * here. Might want to change this later. |
| 42 | */ |
| 43 | |
| 44 | #include <sys/cdefs.h> |
| 45 | __KERNEL_RCSID(0, "$NetBSD: procfs_machdep.c,v 1.13 2016/08/08 09:39:06 msaitoh Exp $" ); |
| 46 | |
| 47 | #include <sys/param.h> |
| 48 | #include <sys/systm.h> |
| 49 | #include <sys/mount.h> |
| 50 | #include <sys/stat.h> |
| 51 | #include <sys/vnode.h> |
| 52 | |
| 53 | #include <miscfs/procfs/procfs.h> |
| 54 | |
| 55 | #include <machine/cpu.h> |
| 56 | #include <machine/reg.h> |
| 57 | #include <machine/specialreg.h> |
| 58 | |
| 59 | /* |
| 60 | * The feature table. The order is the same as Linux's |
| 61 | * x86/include/asm/cpufeatures.h. |
| 62 | */ |
| 63 | static const char * const x86_features[][32] = { |
| 64 | { /* (0) Common: 0x0000001 edx */ |
| 65 | "fpu" , "vme" , "de" , "pse" , "tsc" , "msr" , "pae" , "mce" , |
| 66 | "cx8" , "apic" , NULL, "sep" , "mtrr" , "pge" , "mca" , "cmov" , |
| 67 | "pat" , "pse36" , "pn" , "clflush" , NULL, "dts" , "acpi" , "mmx" , |
| 68 | "fxsr" , "sse" , "sse2" , "ss" , "ht" , "tm" , "ia64" , "pbe" }, |
| 69 | |
| 70 | { /* (1) AMD-defined: 0x80000001 edx */ |
| 71 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 72 | NULL, NULL, NULL, "syscall" , NULL, NULL, NULL, NULL, |
| 73 | NULL, NULL, NULL, "mp" , "nx" , NULL, "mmxext" , NULL, |
| 74 | NULL, "fxsr_opt" , "pdpe1gb" , "rdtscp" , NULL, "lm" , "3dnowext" ,"3dnow" }, |
| 75 | |
| 76 | { /* (2) Transmeta-defined */ |
| 77 | "recovery" , "longrun" , NULL, "lrti" , NULL, NULL, NULL, NULL, |
| 78 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 79 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 80 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}, |
| 81 | |
| 82 | { /* (3) Linux mapping */ |
| 83 | "cxmmx" , NULL, "cyrix_arr" , "centaur_mcr" , NULL, |
| 84 | "constant_tsc" , NULL, NULL, |
| 85 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 86 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 87 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}, |
| 88 | |
| 89 | { /* (4) Intel-defined: 0x00000001 ecx */ |
| 90 | "pni" , "pclmulqdq" , "dtes64" , "monitor" , "ds_cpl" , "vmx" , "smx" , "est" , |
| 91 | "tm2" , "ssse3" , "cid" , "sdbg" , "fma" , "cx16" , "xtpr" , "pdcm" , |
| 92 | NULL, "pcid" , "dca" , "sse4_1" , "sse4_2" , "x2apic" , "movbe" , "popcnt" , |
| 93 | "tsc_deadline_timer" , "aes" , "xsave" , NULL, |
| 94 | "avx" , "f16c" , "rdrand" , "hypervisor" }, |
| 95 | |
| 96 | { /* (5) VIA/Cyrix/Centaur-defined */ |
| 97 | NULL, NULL, "rng" , "rng_en" , NULL, NULL, "ace" , "ace_en" , |
| 98 | "ace2" , "ace2_en" , "phe" , "phe_en" , "pmm" , "pmm_en" , NULL, NULL, |
| 99 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 100 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}, |
| 101 | |
| 102 | { /* (6) AMD defined 80000001 ecx */ |
| 103 | "lahf_lm" , "cmp_legacy" , "svm" , "extapic" , |
| 104 | "cr8_legacy" , "abm" , "sse4a" , "misalignsse" , |
| 105 | "3dnowprefetch" , "osvw" , "ibs" , "xop" , "skinit" , "wdt" , NULL, "lwp" , |
| 106 | "fma4" , "tce" , NULL, "nodeid_msr" , |
| 107 | NULL, "tbm" , "topoext" , "perfctr_core" , |
| 108 | "perfctr_nb" , NULL, "bpext" , "ptsc" , |
| 109 | "perfctr_l2" , "mwaitx" , NULL, NULL}, |
| 110 | |
| 111 | { /* (7) Linux mapping */ |
| 112 | NULL, NULL, "cpb" , "ebp" , NULL, "pln" , "pts" , "dtherm" , |
| 113 | "hw_pstate" , "proc_feedback" , NULL, NULL, |
| 114 | NULL, NULL, NULL, "intel_pt" , |
| 115 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 116 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}, |
| 117 | |
| 118 | { /* (8) Linux mapping */ |
| 119 | "tpr_shadow" , "vnmi" , "flexpriority" , "ept" , |
| 120 | "vpid" , "npt" , "lbrv" , "svm_lock" , |
| 121 | "nrip_save" , "tsc_scale" , "vmcb_clean" , "flushbyasid" , |
| 122 | "decodeassists" , "pausefilter" , "pfthreshold" , "vmmcall" , |
| 123 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 124 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}, |
| 125 | |
| 126 | { /* (9) Intel-defined: 00000007 ebx */ |
| 127 | "fsgsbase" , "tsc_adjust" , NULL, "bmi1" , "hle" , "avx2" , NULL, "smep" , |
| 128 | "bmi2" , "erms" , "invpcid" , "rtm" , "cqm" , NULL, "mpx" , NULL, |
| 129 | "avx512f" , "avx512dq" , "rdseed" , "adx" , |
| 130 | "smap" , NULL, "pcommit" , "clflushopt" , |
| 131 | "clwb" , NULL, "avx512pf" , "avx512er" , |
| 132 | "avx512cd" , "sha_ni" , "avx512bw" , "avx512vl" }, |
| 133 | |
| 134 | { /* (10) 0000000d eax */ |
| 135 | "xsaveopt" , "xsavec" , "xgetbv1" , "xsaves" , NULL, NULL, NULL, NULL, |
| 136 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 137 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 138 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}, |
| 139 | |
| 140 | { /* (11) 0x0000000f:0 edx */ |
| 141 | NULL, "cqm_llc" , NULL, NULL, NULL, NULL, NULL, NULL, |
| 142 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 143 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 144 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}, |
| 145 | |
| 146 | { /* (12) 0x0000000f:1 edx */ |
| 147 | "cqm_occup_llc" , NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 148 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 149 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
| 150 | NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL}, |
| 151 | }; |
| 152 | |
| 153 | static int procfs_getonecpu(int, struct cpu_info *, char *, size_t *); |
| 154 | |
| 155 | /* |
| 156 | * Linux-style /proc/cpuinfo. |
| 157 | * Only used when procfs is mounted with -o linux. |
| 158 | * |
| 159 | * In the multiprocessor case, this should be a loop over all CPUs. |
| 160 | */ |
| 161 | int |
| 162 | procfs_getcpuinfstr(char *bf, size_t *len) |
| 163 | { |
| 164 | struct cpu_info *ci; |
| 165 | CPU_INFO_ITERATOR cii; |
| 166 | size_t i, total, size, used; |
| 167 | |
| 168 | i = total = 0; |
| 169 | used = size = *len; |
| 170 | |
| 171 | for (CPU_INFO_FOREACH(cii, ci)) { |
| 172 | procfs_getonecpu(i++, ci, bf, &used); |
| 173 | total += used + 1; |
| 174 | if (used + 1 < size) { |
| 175 | bf += used; |
| 176 | *bf++ = '\n'; |
| 177 | size -= used + 1; |
| 178 | used = size; |
| 179 | } else |
| 180 | used = 0; |
| 181 | } |
| 182 | size = *len; |
| 183 | *len = total; |
| 184 | return size < *len ? -1 : 0; |
| 185 | } |
| 186 | |
| 187 | static int |
| 188 | procfs_getonefeatreg(uint32_t reg, const char * const *table, char *p, |
| 189 | size_t *left) |
| 190 | { |
| 191 | size_t l; |
| 192 | |
| 193 | for (size_t i = 0; i < 32; i++) { |
| 194 | if ((reg & (1 << i)) && table[i]) { |
| 195 | l = snprintf(p, *left, "%s " , table[i]); |
| 196 | if (l < *left) { |
| 197 | *left -= l; |
| 198 | p += l; |
| 199 | } else |
| 200 | break; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | return 0; /* XXX */ |
| 205 | } |
| 206 | |
| 207 | /* |
| 208 | * Print feature bits. The code assume that unused entry of x86_features[] |
| 209 | * is zero-cleared. |
| 210 | * |
| 211 | * XXX This function will be rewritten when all of linux entries are |
| 212 | * decoded. |
| 213 | */ |
| 214 | static int |
| 215 | procfs_getonecpufeatures(struct cpu_info *ci, char *p, size_t *left) |
| 216 | { |
| 217 | size_t last = *left; |
| 218 | size_t diff; |
| 219 | |
| 220 | procfs_getonefeatreg(ci->ci_feat_val[0], x86_features[0], p, left); |
| 221 | diff = last - *left; |
| 222 | |
| 223 | procfs_getonefeatreg(ci->ci_feat_val[2], x86_features[1], p + diff, |
| 224 | left); |
| 225 | diff = last - *left; |
| 226 | |
| 227 | /* x86_features[2] is for Transmeta */ |
| 228 | /* x86_features[3] is Linux defined mapping */ |
| 229 | |
| 230 | procfs_getonefeatreg(ci->ci_feat_val[1], x86_features[4], p + diff, |
| 231 | left); |
| 232 | diff = last - *left; |
| 233 | |
| 234 | procfs_getonefeatreg(ci->ci_feat_val[4], x86_features[5], p + diff, |
| 235 | left); |
| 236 | diff = last - *left; |
| 237 | |
| 238 | procfs_getonefeatreg(ci->ci_feat_val[3], x86_features[6], p + diff, |
| 239 | left); |
| 240 | diff = last - *left; |
| 241 | |
| 242 | /* x86_features[7] is Linux defined mapping */ |
| 243 | /* x86_features[8] is Linux defined mapping */ |
| 244 | |
| 245 | procfs_getonefeatreg(ci->ci_feat_val[5], x86_features[9], p + diff, |
| 246 | left); |
| 247 | diff = last - *left; |
| 248 | |
| 249 | /* (10) 0000000d eax */ |
| 250 | /* (11) 0x0000000f(ecx=0) edx */ |
| 251 | /* (12) 0x0000000f(ecx=1) edx */ |
| 252 | |
| 253 | return 0; /* XXX */ |
| 254 | } |
| 255 | |
| 256 | static int |
| 257 | procfs_getonecpu(int xcpu, struct cpu_info *ci, char *bf, size_t *len) |
| 258 | { |
| 259 | size_t left, l, size; |
| 260 | char featurebuf[1024], *p; |
| 261 | |
| 262 | p = featurebuf; |
| 263 | left = sizeof(featurebuf); |
| 264 | size = *len; |
| 265 | procfs_getonecpufeatures(ci, p, &left); |
| 266 | |
| 267 | p = bf; |
| 268 | left = *len; |
| 269 | size = 0; |
| 270 | l = snprintf(p, left, |
| 271 | "processor\t: %d\n" |
| 272 | "vendor_id\t: %s\n" |
| 273 | "cpu family\t: %d\n" |
| 274 | "model\t\t: %d\n" |
| 275 | "model name\t: %s\n" |
| 276 | "stepping\t: " , |
| 277 | xcpu, |
| 278 | (char *)ci->ci_vendor, |
| 279 | CPUID_TO_FAMILY(ci->ci_signature), |
| 280 | CPUID_TO_MODEL(ci->ci_signature), |
| 281 | cpu_brand_string |
| 282 | ); |
| 283 | size += l; |
| 284 | if (l < left) { |
| 285 | left -= l; |
| 286 | p += l; |
| 287 | } else |
| 288 | left = 0; |
| 289 | |
| 290 | if (cpuid_level >= 0) |
| 291 | l = snprintf(p, left, "%d\n" , |
| 292 | CPUID_TO_STEPPING(ci->ci_signature)); |
| 293 | else |
| 294 | l = snprintf(p, left, "unknown\n" ); |
| 295 | |
| 296 | size += l; |
| 297 | if (l < left) { |
| 298 | left -= l; |
| 299 | p += l; |
| 300 | } else |
| 301 | left = 0; |
| 302 | |
| 303 | if (ci->ci_data.cpu_cc_freq != 0) { |
| 304 | uint64_t freq, fraq; |
| 305 | |
| 306 | freq = (ci->ci_data.cpu_cc_freq + 4999) / 1000000; |
| 307 | fraq = ((ci->ci_data.cpu_cc_freq + 4999) / 10000) % 100; |
| 308 | l = snprintf(p, left, "cpu MHz\t\t: %" PRIu64 ".%02" PRIu64 |
| 309 | "\n" , freq, fraq); |
| 310 | } else |
| 311 | l = snprintf(p, left, "cpu MHz\t\t: unknown\n" ); |
| 312 | |
| 313 | size += l; |
| 314 | if (l < left) { |
| 315 | left -= l; |
| 316 | p += l; |
| 317 | } else |
| 318 | left = 0; |
| 319 | |
| 320 | l = snprintf(p, left, |
| 321 | "fdiv_bug\t: %s\n" |
| 322 | "fpu\t\t: %s\n" |
| 323 | "fpu_exception\t: yes\n" |
| 324 | "cpuid level\t: %d\n" |
| 325 | "wp\t\t: %s\n" |
| 326 | "flags\t\t: %s\n" , |
| 327 | i386_fpu_fdivbug ? "yes" : "no" , /* an old pentium */ |
| 328 | i386_fpu_present ? "yes" : "no" , /* not a 486SX */ |
| 329 | cpuid_level, |
| 330 | (rcr0() & CR0_WP) ? "yes" : "no" , |
| 331 | featurebuf |
| 332 | ); |
| 333 | size += l; |
| 334 | |
| 335 | left = *len; |
| 336 | *len = size; |
| 337 | return left < *len ? -1 : 0; |
| 338 | } |
| 339 | |
| 340 | #if defined(__HAVE_PROCFS_MACHDEP) && !defined(__x86_64__) |
| 341 | |
| 342 | void |
| 343 | procfs_machdep_allocvp(struct vnode *vp) |
| 344 | { |
| 345 | struct pfsnode *pfs = vp->v_data; |
| 346 | |
| 347 | switch (pfs->pfs_type) { |
| 348 | case Pmachdep_xmmregs: |
| 349 | /* /proc/N/xmmregs = -rw------- */ |
| 350 | pfs->pfs_mode = S_IRUSR|S_IWUSR; |
| 351 | vp->v_type = VREG; |
| 352 | break; |
| 353 | default: |
| 354 | KASSERT(false); |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | int |
| 359 | procfs_machdep_rw(struct lwp *curl, struct lwp *l, struct pfsnode *pfs, |
| 360 | struct uio *uio) |
| 361 | { |
| 362 | |
| 363 | switch (pfs->pfs_type) { |
| 364 | case Pmachdep_xmmregs: |
| 365 | return (procfs_machdep_doxmmregs(curl, l, pfs, uio)); |
| 366 | default: |
| 367 | KASSERT(false); |
| 368 | } |
| 369 | return EINVAL; |
| 370 | } |
| 371 | |
| 372 | int |
| 373 | procfs_machdep_getattr(struct vnode *vp, struct vattr *vap, struct proc *procp) |
| 374 | { |
| 375 | struct pfsnode *pfs = VTOPFS(vp); |
| 376 | |
| 377 | switch (pfs->pfs_type) { |
| 378 | case Pmachdep_xmmregs: |
| 379 | vap->va_bytes = vap->va_size = sizeof(struct xmmregs); |
| 380 | break; |
| 381 | default: |
| 382 | KASSERT(false); |
| 383 | } |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | int |
| 388 | procfs_machdep_doxmmregs(struct lwp *curl, struct lwp *l, |
| 389 | struct pfsnode *pfs, struct uio *uio) |
| 390 | { |
| 391 | |
| 392 | return process_machdep_doxmmregs(curl, l, uio); |
| 393 | } |
| 394 | |
| 395 | int |
| 396 | procfs_machdep_validxmmregs(struct lwp *l, struct mount *mp) |
| 397 | { |
| 398 | |
| 399 | return process_machdep_validxmmregs(l->l_proc); |
| 400 | } |
| 401 | |
| 402 | #endif |
| 403 | |