Annotation of src/sys/arch/x86/x86/procfs_machdep.c, Revision 1.19
1.19 ! maya 1: /* $NetBSD: procfs_machdep.c,v 1.18 2017/10/05 03:24:40 msaitoh Exp $ */
1.1 rmind 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>
1.19 ! maya 45: __KERNEL_RCSID(0, "$NetBSD: procfs_machdep.c,v 1.18 2017/10/05 03:24:40 msaitoh Exp $");
1.1 rmind 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>
1.18 msaitoh 58: #include <x86/cputypes.h>
59: #include <x86/cpuvar.h>
1.1 rmind 60:
1.10 msaitoh 61: /*
1.11 msaitoh 62: * The feature table. The order is the same as Linux's
1.10 msaitoh 63: * x86/include/asm/cpufeatures.h.
64: */
1.8 msaitoh 65: static const char * const x86_features[][32] = {
1.13 msaitoh 66: { /* (0) Common: 0x0000001 edx */
1.1 rmind 67: "fpu", "vme", "de", "pse", "tsc", "msr", "pae", "mce",
68: "cx8", "apic", NULL, "sep", "mtrr", "pge", "mca", "cmov",
69: "pat", "pse36", "pn", "clflush", NULL, "dts", "acpi", "mmx",
1.8 msaitoh 70: "fxsr", "sse", "sse2", "ss", "ht", "tm", "ia64", "pbe"},
71:
1.13 msaitoh 72: { /* (1) AMD-defined: 0x80000001 edx */
1.8 msaitoh 73: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
74: NULL, NULL, NULL, "syscall", NULL, NULL, NULL, NULL,
75: NULL, NULL, NULL, "mp", "nx", NULL, "mmxext", NULL,
76: NULL, "fxsr_opt", "pdpe1gb", "rdtscp", NULL, "lm", "3dnowext","3dnow"},
77:
1.10 msaitoh 78: { /* (2) Transmeta-defined */
1.8 msaitoh 79: "recovery", "longrun", NULL, "lrti", NULL, NULL, NULL, NULL,
80: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
81: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
82: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
83:
1.10 msaitoh 84: { /* (3) Linux mapping */
1.8 msaitoh 85: "cxmmx", NULL, "cyrix_arr", "centaur_mcr", NULL,
86: "constant_tsc", NULL, NULL,
87: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
88: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
89: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
90:
1.13 msaitoh 91: { /* (4) Intel-defined: 0x00000001 ecx */
1.8 msaitoh 92: "pni", "pclmulqdq", "dtes64", "monitor", "ds_cpl", "vmx", "smx", "est",
93: "tm2", "ssse3", "cid", "sdbg", "fma", "cx16", "xtpr", "pdcm",
94: NULL, "pcid", "dca", "sse4_1", "sse4_2", "x2apic", "movbe", "popcnt",
95: "tsc_deadline_timer", "aes", "xsave", NULL,
96: "avx", "f16c", "rdrand", "hypervisor"},
97:
98: { /* (5) VIA/Cyrix/Centaur-defined */
99: NULL, NULL, "rng", "rng_en", NULL, NULL, "ace", "ace_en",
1.13 msaitoh 100: "ace2", "ace2_en", "phe", "phe_en", "pmm", "pmm_en", NULL, NULL,
1.8 msaitoh 101: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
102: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
103:
104: { /* (6) AMD defined 80000001 ecx */
105: "lahf_lm", "cmp_legacy", "svm", "extapic",
106: "cr8_legacy", "abm", "sse4a", "misalignsse",
107: "3dnowprefetch", "osvw", "ibs", "xop", "skinit", "wdt", NULL, "lwp",
108: "fma4", "tce", NULL, "nodeid_msr",
109: NULL, "tbm", "topoext", "perfctr_core",
1.12 msaitoh 110: "perfctr_nb", NULL, "bpext", "ptsc",
1.17 msaitoh 111: "perfctr_llc", "mwaitx", NULL, NULL},
1.8 msaitoh 112:
1.10 msaitoh 113: { /* (7) Linux mapping */
1.12 msaitoh 114: NULL, NULL, "cpb", "ebp", NULL, "pln", "pts", "dtherm",
1.17 msaitoh 115: "hw_pstate", "proc_feedback", "sme", NULL,
1.12 msaitoh 116: NULL, NULL, NULL, "intel_pt",
1.8 msaitoh 117: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
118: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
119:
120: { /* (8) Linux mapping */
121: "tpr_shadow", "vnmi", "flexpriority", "ept",
122: "vpid", "npt", "lbrv", "svm_lock",
123: "nrip_save", "tsc_scale", "vmcb_clean", "flushbyasid",
124: "decodeassists", "pausefilter", "pfthreshold", "vmmcall",
125: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
126: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
127:
128: { /* (9) Intel-defined: 00000007 ebx */
129: "fsgsbase", "tsc_adjust", NULL, "bmi1", "hle", "avx2", NULL, "smep",
1.14 msaitoh 130: "bmi2", "erms", "invpcid", "rtm", "cqm", NULL, "mpx", "rdt_a",
1.12 msaitoh 131: "avx512f", "avx512dq", "rdseed", "adx",
1.14 msaitoh 132: "smap", NULL, NULL, "clflushopt",
1.8 msaitoh 133: "clwb", NULL, "avx512pf", "avx512er",
1.12 msaitoh 134: "avx512cd", "sha_ni", "avx512bw", "avx512vl"},
1.8 msaitoh 135:
1.17 msaitoh 136: { /* (10) 0x0000000d:1 eax */
1.8 msaitoh 137: "xsaveopt", "xsavec", "xgetbv1", "xsaves", NULL, NULL, NULL, NULL,
138: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
139: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
140: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
141:
1.10 msaitoh 142: { /* (11) 0x0000000f:0 edx */
1.8 msaitoh 143: NULL, "cqm_llc", NULL, NULL, NULL, NULL, NULL, NULL,
144: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
145: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
146: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
147:
1.10 msaitoh 148: { /* (12) 0x0000000f:1 edx */
1.8 msaitoh 149: "cqm_occup_llc", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
150: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
151: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
152: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
1.15 msaitoh 153:
154: { /* (13) 0x80000008 ebx */
155: "clzero", "irperf", NULL, NULL, NULL, NULL, NULL, NULL,
156: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
157: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
158: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
159:
160: { /* (14) 0x00000006 eax */
161: "dtherm", "ida", "arat", NULL, "pln", NULL, "pts", "hwp",
162: "hwp_notify", "hwp_act_window", "hwp_epp","hwp_pkg_req",
163: NULL, NULL, NULL, NULL,
164: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
165: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
166:
167: { /* (15) 0x8000000a edx */
168: "npt", "lbrv", "svm_lock", "nrip_save",
169: "tsc_scale", "vmcb_clean", "flushbyasid", "decodeassists",
1.17 msaitoh 170: NULL, NULL, "pausefilter", NULL, "pfthreshold", "avic", NULL,
171: "v_vmsave_vmload",
172: "vgif", NULL, NULL, NULL, NULL, NULL, NULL, NULL,
1.15 msaitoh 173: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
174:
175: { /* (16) 0x00000007:0 ecx */
176: NULL, "avx512vbmi", NULL, "pku", "ospke", NULL, NULL, NULL,
177: NULL, NULL, NULL, NULL, NULL, NULL, "avx512_vpopcntdq", NULL,
178: "la57", NULL, NULL, NULL, NULL, NULL, "rdpid", NULL,
179: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
180:
181: { /* (17) 0x80000007 ebx */
182: "overflow_recov", "succor", "smca", NULL, NULL, NULL, NULL, NULL,
183: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
184: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
185: NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL},
1.1 rmind 186: };
187:
1.6 christos 188: static int procfs_getonecpu(int, struct cpu_info *, char *, size_t *);
1.1 rmind 189:
190: /*
191: * Linux-style /proc/cpuinfo.
192: * Only used when procfs is mounted with -o linux.
193: *
194: * In the multiprocessor case, this should be a loop over all CPUs.
195: */
196: int
1.6 christos 197: procfs_getcpuinfstr(char *bf, size_t *len)
1.1 rmind 198: {
199: struct cpu_info *ci;
200: CPU_INFO_ITERATOR cii;
1.6 christos 201: size_t i, total, size, used;
1.1 rmind 202:
1.6 christos 203: i = total = 0;
204: used = size = *len;
1.8 msaitoh 205:
1.1 rmind 206: for (CPU_INFO_FOREACH(cii, ci)) {
1.6 christos 207: procfs_getonecpu(i++, ci, bf, &used);
208: total += used + 1;
1.16 msaitoh 209: if (used + 1 <= size) {
1.1 rmind 210: bf += used;
211: *bf++ = '\n';
1.6 christos 212: size -= used + 1;
213: used = size;
214: } else
215: used = 0;
1.1 rmind 216: }
1.6 christos 217: size = *len;
218: *len = total;
219: return size < *len ? -1 : 0;
1.1 rmind 220: }
221:
222: static int
1.8 msaitoh 223: procfs_getonefeatreg(uint32_t reg, const char * const *table, char *p,
224: size_t *left)
225: {
226: size_t l;
227:
228: for (size_t i = 0; i < 32; i++) {
229: if ((reg & (1 << i)) && table[i]) {
230: l = snprintf(p, *left, "%s ", table[i]);
231: if (l < *left) {
232: *left -= l;
233: p += l;
234: } else
235: break;
236: }
237: }
238:
239: return 0; /* XXX */
240: }
241:
242: /*
1.10 msaitoh 243: * Print feature bits. The code assume that unused entry of x86_features[]
1.8 msaitoh 244: * is zero-cleared.
245: *
246: * XXX This function will be rewritten when all of linux entries are
247: * decoded.
248: */
249: static int
250: procfs_getonecpufeatures(struct cpu_info *ci, char *p, size_t *left)
251: {
252: size_t last = *left;
253: size_t diff;
1.17 msaitoh 254: u_int descs[4];
1.8 msaitoh 255:
256: procfs_getonefeatreg(ci->ci_feat_val[0], x86_features[0], p, left);
257: diff = last - *left;
258:
259: procfs_getonefeatreg(ci->ci_feat_val[2], x86_features[1], p + diff,
260: left);
261: diff = last - *left;
262:
263: /* x86_features[2] is for Transmeta */
264: /* x86_features[3] is Linux defined mapping */
265:
266: procfs_getonefeatreg(ci->ci_feat_val[1], x86_features[4], p + diff,
267: left);
268: diff = last - *left;
269:
270: procfs_getonefeatreg(ci->ci_feat_val[4], x86_features[5], p + diff,
271: left);
272: diff = last - *left;
273:
274: procfs_getonefeatreg(ci->ci_feat_val[3], x86_features[6], p + diff,
275: left);
276: diff = last - *left;
277:
278: /* x86_features[7] is Linux defined mapping */
279: /* x86_features[8] is Linux defined mapping */
280:
281: procfs_getonefeatreg(ci->ci_feat_val[5], x86_features[9], p + diff,
282: left);
283: diff = last - *left;
284:
1.18 msaitoh 285: if (ci->ci_max_cpuid >= 0x0d) {
1.17 msaitoh 286: x86_cpuid2(0x0d, 1, descs);
287: procfs_getonefeatreg(descs[0], x86_features[10], p + diff,
288: left);
289: diff = last - *left;
290: }
291:
1.18 msaitoh 292: if (ci->ci_max_cpuid >= 0x0f) {
1.17 msaitoh 293: x86_cpuid2(0x0f, 0, descs);
294: procfs_getonefeatreg(descs[3], x86_features[11], p + diff,
295: left);
296: diff = last - *left;
297:
298: x86_cpuid2(0x0f, 1, descs);
299: procfs_getonefeatreg(descs[3], x86_features[12], p + diff,
300: left);
301: diff = last - *left;
302: }
303:
1.18 msaitoh 304: if ((cpu_vendor == CPUVENDOR_AMD)
305: && (ci->ci_max_ext_cpuid >= 0x80000008)) {
306: x86_cpuid(0x80000008, descs);
307: procfs_getonefeatreg(descs[1], x86_features[13], p + diff,
308: left);
309: diff = last - *left;
310: }
1.17 msaitoh 311:
1.18 msaitoh 312: if (ci->ci_max_cpuid >= 0x06) {
1.17 msaitoh 313: x86_cpuid(0x06, descs);
314: procfs_getonefeatreg(descs[0], x86_features[14], p + diff,
315: left);
316: diff = last - *left;
317: }
318:
1.18 msaitoh 319: if ((cpu_vendor == CPUVENDOR_AMD)
320: && (ci->ci_max_ext_cpuid >= 0x8000000a)) {
321: x86_cpuid(0x8000000a, descs);
322: procfs_getonefeatreg(descs[3], x86_features[15], p + diff,
323: left);
324: diff = last - *left;
325: }
1.15 msaitoh 326:
327: procfs_getonefeatreg(ci->ci_feat_val[6], x86_features[16], p + diff,
328: left);
329: diff = last - *left;
330:
1.18 msaitoh 331: if ((cpu_vendor == CPUVENDOR_AMD)
332: && (ci->ci_max_ext_cpuid >= 0x80000007)) {
333: x86_cpuid(0x80000007, descs);
334: procfs_getonefeatreg(descs[1], x86_features[17], p + diff,
335: left);
336: diff = last - *left;
337: }
1.10 msaitoh 338:
1.8 msaitoh 339: return 0; /* XXX */
340: }
341:
342: static int
1.6 christos 343: procfs_getonecpu(int xcpu, struct cpu_info *ci, char *bf, size_t *len)
1.1 rmind 344: {
1.6 christos 345: size_t left, l, size;
346: char featurebuf[1024], *p;
1.1 rmind 347:
348: p = featurebuf;
349: left = sizeof(featurebuf);
1.6 christos 350: size = *len;
1.8 msaitoh 351: procfs_getonecpufeatures(ci, p, &left);
1.1 rmind 352:
353: p = bf;
354: left = *len;
1.6 christos 355: size = 0;
1.1 rmind 356: l = snprintf(p, left,
357: "processor\t: %d\n"
358: "vendor_id\t: %s\n"
359: "cpu family\t: %d\n"
360: "model\t\t: %d\n"
361: "model name\t: %s\n"
362: "stepping\t: ",
363: xcpu,
364: (char *)ci->ci_vendor,
1.9 msaitoh 365: CPUID_TO_FAMILY(ci->ci_signature),
366: CPUID_TO_MODEL(ci->ci_signature),
1.1 rmind 367: cpu_brand_string
368: );
1.6 christos 369: size += l;
370: if (l < left) {
371: left -= l;
372: p += l;
373: } else
374: left = 0;
1.1 rmind 375:
376: if (cpuid_level >= 0)
1.9 msaitoh 377: l = snprintf(p, left, "%d\n",
378: CPUID_TO_STEPPING(ci->ci_signature));
1.1 rmind 379: else
380: l = snprintf(p, left, "unknown\n");
381:
1.6 christos 382: size += l;
383: if (l < left) {
384: left -= l;
385: p += l;
386: } else
387: left = 0;
1.1 rmind 388:
389: if (ci->ci_data.cpu_cc_freq != 0) {
390: uint64_t freq, fraq;
391:
392: freq = (ci->ci_data.cpu_cc_freq + 4999) / 1000000;
393: fraq = ((ci->ci_data.cpu_cc_freq + 4999) / 10000) % 100;
1.8 msaitoh 394: l = snprintf(p, left, "cpu MHz\t\t: %" PRIu64 ".%02" PRIu64
395: "\n", freq, fraq);
1.1 rmind 396: } else
397: l = snprintf(p, left, "cpu MHz\t\t: unknown\n");
398:
1.6 christos 399: size += l;
400: if (l < left) {
401: left -= l;
402: p += l;
403: } else
404: left = 0;
1.1 rmind 405:
406: l = snprintf(p, left,
1.15 msaitoh 407: "apicid\t\t: %d\n"
408: "initial apicid\t: %d\n",
409: ci->ci_acpiid,
410: ci->ci_initapicid
411: );
412: size += l;
413: if (l < left) {
414: left -= l;
415: p += l;
416: } else
417: left = 0;
418:
419: l = snprintf(p, left,
420: #ifdef __i386__
1.1 rmind 421: "fdiv_bug\t: %s\n"
1.15 msaitoh 422: #endif
1.19 ! maya 423: "fpu\t\t: yes\n"
1.2 dsl 424: "fpu_exception\t: yes\n"
1.1 rmind 425: "cpuid level\t: %d\n"
426: "wp\t\t: %s\n"
1.15 msaitoh 427: "flags\t\t: %s\n"
428: "clflush size\t: %d\n",
429: #ifdef __i386__
1.3 dsl 430: i386_fpu_fdivbug ? "yes" : "no", /* an old pentium */
1.15 msaitoh 431: #endif
1.18 msaitoh 432: ci->ci_max_cpuid,
1.1 rmind 433: (rcr0() & CR0_WP) ? "yes" : "no",
1.15 msaitoh 434: featurebuf,
435: ci->ci_cflush_lsize
1.1 rmind 436: );
1.6 christos 437: size += l;
1.1 rmind 438:
1.6 christos 439: left = *len;
440: *len = size;
441: return left < *len ? -1 : 0;
1.1 rmind 442: }
443:
444: #if defined(__HAVE_PROCFS_MACHDEP) && !defined(__x86_64__)
445:
446: void
447: procfs_machdep_allocvp(struct vnode *vp)
448: {
449: struct pfsnode *pfs = vp->v_data;
450:
451: switch (pfs->pfs_type) {
452: case Pmachdep_xmmregs:
453: /* /proc/N/xmmregs = -rw------- */
454: pfs->pfs_mode = S_IRUSR|S_IWUSR;
455: vp->v_type = VREG;
456: break;
457: default:
458: KASSERT(false);
459: }
460: }
461:
462: int
463: procfs_machdep_rw(struct lwp *curl, struct lwp *l, struct pfsnode *pfs,
464: struct uio *uio)
465: {
466:
467: switch (pfs->pfs_type) {
468: case Pmachdep_xmmregs:
469: return (procfs_machdep_doxmmregs(curl, l, pfs, uio));
470: default:
471: KASSERT(false);
472: }
473: return EINVAL;
474: }
475:
476: int
477: procfs_machdep_getattr(struct vnode *vp, struct vattr *vap, struct proc *procp)
478: {
479: struct pfsnode *pfs = VTOPFS(vp);
480:
481: switch (pfs->pfs_type) {
482: case Pmachdep_xmmregs:
483: vap->va_bytes = vap->va_size = sizeof(struct xmmregs);
484: break;
485: default:
486: KASSERT(false);
487: }
488: return 0;
489: }
490:
491: int
492: procfs_machdep_doxmmregs(struct lwp *curl, struct lwp *l,
493: struct pfsnode *pfs, struct uio *uio)
494: {
495:
496: return process_machdep_doxmmregs(curl, l, uio);
497: }
498:
499: int
500: procfs_machdep_validxmmregs(struct lwp *l, struct mount *mp)
501: {
502:
503: return process_machdep_validxmmregs(l->l_proc);
504: }
505:
506: #endif
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