17c478bd9Sstevel@tonic-gate /* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 519397407SSherry Moore * Common Development and Distribution License (the "License"). 619397407SSherry Moore * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217c478bd9Sstevel@tonic-gate /* 227417cfdeSKuriakose Kuruvilla * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved. 237c478bd9Sstevel@tonic-gate */ 24ebb8ac07SRobert Mustacchi /* 25*12596538SJohn Levon * Copyright 2019 Joyent, Inc. 26ebb8ac07SRobert Mustacchi */ 277c478bd9Sstevel@tonic-gate 287c478bd9Sstevel@tonic-gate 297c478bd9Sstevel@tonic-gate #include <sys/types.h> 307c478bd9Sstevel@tonic-gate #include <sys/file.h> 317c478bd9Sstevel@tonic-gate #include <sys/errno.h> 327c478bd9Sstevel@tonic-gate #include <sys/open.h> 337c478bd9Sstevel@tonic-gate #include <sys/cred.h> 347c478bd9Sstevel@tonic-gate #include <sys/conf.h> 357c478bd9Sstevel@tonic-gate #include <sys/stat.h> 367c478bd9Sstevel@tonic-gate #include <sys/processor.h> 377c478bd9Sstevel@tonic-gate #include <sys/cpuvar.h> 387c478bd9Sstevel@tonic-gate #include <sys/kmem.h> 397c478bd9Sstevel@tonic-gate #include <sys/modctl.h> 407c478bd9Sstevel@tonic-gate #include <sys/ddi.h> 417c478bd9Sstevel@tonic-gate #include <sys/sunddi.h> 42*12596538SJohn Levon #include <sys/policy.h> 437c478bd9Sstevel@tonic-gate 447c478bd9Sstevel@tonic-gate #include <sys/auxv.h> 457c478bd9Sstevel@tonic-gate #include <sys/cpuid_drv.h> 467c478bd9Sstevel@tonic-gate #include <sys/systeminfo.h> 477c478bd9Sstevel@tonic-gate 487c478bd9Sstevel@tonic-gate #if defined(__x86) 497c478bd9Sstevel@tonic-gate #include <sys/x86_archext.h> 507c478bd9Sstevel@tonic-gate #endif 517c478bd9Sstevel@tonic-gate 527c478bd9Sstevel@tonic-gate static dev_info_t *cpuid_devi; 537c478bd9Sstevel@tonic-gate 547c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 557c478bd9Sstevel@tonic-gate static int 567c478bd9Sstevel@tonic-gate cpuid_getinfo(dev_info_t *devi, ddi_info_cmd_t cmd, void *arg, void **result) 577c478bd9Sstevel@tonic-gate { 587c478bd9Sstevel@tonic-gate switch (cmd) { 597c478bd9Sstevel@tonic-gate case DDI_INFO_DEVT2DEVINFO: 607c478bd9Sstevel@tonic-gate case DDI_INFO_DEVT2INSTANCE: 617c478bd9Sstevel@tonic-gate break; 627c478bd9Sstevel@tonic-gate default: 637c478bd9Sstevel@tonic-gate return (DDI_FAILURE); 647c478bd9Sstevel@tonic-gate } 657c478bd9Sstevel@tonic-gate 667c478bd9Sstevel@tonic-gate switch (getminor((dev_t)arg)) { 677c478bd9Sstevel@tonic-gate case CPUID_SELF_CPUID_MINOR: 687c478bd9Sstevel@tonic-gate break; 697c478bd9Sstevel@tonic-gate default: 707c478bd9Sstevel@tonic-gate return (DDI_FAILURE); 717c478bd9Sstevel@tonic-gate } 727c478bd9Sstevel@tonic-gate 737c478bd9Sstevel@tonic-gate if (cmd == DDI_INFO_DEVT2INSTANCE) 747c478bd9Sstevel@tonic-gate *result = 0; 757c478bd9Sstevel@tonic-gate else 767c478bd9Sstevel@tonic-gate *result = cpuid_devi; 777c478bd9Sstevel@tonic-gate return (DDI_SUCCESS); 787c478bd9Sstevel@tonic-gate } 797c478bd9Sstevel@tonic-gate 807c478bd9Sstevel@tonic-gate static int 817c478bd9Sstevel@tonic-gate cpuid_attach(dev_info_t *devi, ddi_attach_cmd_t cmd) 827c478bd9Sstevel@tonic-gate { 837c478bd9Sstevel@tonic-gate if (cmd != DDI_ATTACH) 847c478bd9Sstevel@tonic-gate return (DDI_FAILURE); 857c478bd9Sstevel@tonic-gate cpuid_devi = devi; 867c478bd9Sstevel@tonic-gate 877c478bd9Sstevel@tonic-gate return (ddi_create_minor_node(devi, CPUID_DRIVER_SELF_NODE, S_IFCHR, 887c478bd9Sstevel@tonic-gate CPUID_SELF_CPUID_MINOR, DDI_PSEUDO, 0)); 897c478bd9Sstevel@tonic-gate } 907c478bd9Sstevel@tonic-gate 917c478bd9Sstevel@tonic-gate static int 927c478bd9Sstevel@tonic-gate cpuid_detach(dev_info_t *devi, ddi_detach_cmd_t cmd) 937c478bd9Sstevel@tonic-gate { 947c478bd9Sstevel@tonic-gate if (cmd != DDI_DETACH) 957c478bd9Sstevel@tonic-gate return (DDI_FAILURE); 967c478bd9Sstevel@tonic-gate ddi_remove_minor_node(devi, NULL); 977c478bd9Sstevel@tonic-gate cpuid_devi = NULL; 987c478bd9Sstevel@tonic-gate return (DDI_SUCCESS); 997c478bd9Sstevel@tonic-gate } 1007c478bd9Sstevel@tonic-gate 1017c478bd9Sstevel@tonic-gate /*ARGSUSED1*/ 1027c478bd9Sstevel@tonic-gate static int 1037c478bd9Sstevel@tonic-gate cpuid_open(dev_t *dev, int flag, int otyp, cred_t *cr) 1047c478bd9Sstevel@tonic-gate { 1057c478bd9Sstevel@tonic-gate return (getminor(*dev) == CPUID_SELF_CPUID_MINOR ? 0 : ENXIO); 1067c478bd9Sstevel@tonic-gate } 1077c478bd9Sstevel@tonic-gate 1087c478bd9Sstevel@tonic-gate #if defined(_HAVE_CPUID_INSN) 1097c478bd9Sstevel@tonic-gate 1107c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 1117c478bd9Sstevel@tonic-gate static int 1127c478bd9Sstevel@tonic-gate cpuid_read(dev_t dev, uio_t *uio, cred_t *cr) 1137c478bd9Sstevel@tonic-gate { 1148949bcd6Sandrei struct cpuid_regs crs; 1157c478bd9Sstevel@tonic-gate int error = 0; 1167c478bd9Sstevel@tonic-gate 1177417cfdeSKuriakose Kuruvilla if (!is_x86_feature(x86_featureset, X86FSET_CPUID)) 1187c478bd9Sstevel@tonic-gate return (ENXIO); 1197c478bd9Sstevel@tonic-gate 1207c478bd9Sstevel@tonic-gate if (uio->uio_resid & (sizeof (crs) - 1)) 1217c478bd9Sstevel@tonic-gate return (EINVAL); 1227c478bd9Sstevel@tonic-gate 1237c478bd9Sstevel@tonic-gate while (uio->uio_resid > 0) { 1247c478bd9Sstevel@tonic-gate u_offset_t uoff; 1257c478bd9Sstevel@tonic-gate 1267c478bd9Sstevel@tonic-gate if ((uoff = (u_offset_t)uio->uio_loffset) > UINT_MAX) { 1277c478bd9Sstevel@tonic-gate error = EINVAL; 1287c478bd9Sstevel@tonic-gate break; 1297c478bd9Sstevel@tonic-gate } 1307c478bd9Sstevel@tonic-gate 1318949bcd6Sandrei crs.cp_eax = (uint32_t)uoff; 1328949bcd6Sandrei crs.cp_ebx = crs.cp_ecx = crs.cp_edx = 0; 1338949bcd6Sandrei (void) cpuid_insn(NULL, &crs); 1347c478bd9Sstevel@tonic-gate 1358949bcd6Sandrei if ((error = uiomove(&crs, sizeof (crs), UIO_READ, uio)) != 0) 1367c478bd9Sstevel@tonic-gate break; 1377c478bd9Sstevel@tonic-gate uio->uio_loffset = uoff + 1; 1387c478bd9Sstevel@tonic-gate } 1397c478bd9Sstevel@tonic-gate 1407c478bd9Sstevel@tonic-gate return (error); 1417c478bd9Sstevel@tonic-gate } 1427c478bd9Sstevel@tonic-gate 1437c478bd9Sstevel@tonic-gate #else 1447c478bd9Sstevel@tonic-gate 1457c478bd9Sstevel@tonic-gate #define cpuid_read nodev 1467c478bd9Sstevel@tonic-gate 1477c478bd9Sstevel@tonic-gate #endif /* _HAVE_CPUID_INSN */ 1487c478bd9Sstevel@tonic-gate 1497c478bd9Sstevel@tonic-gate /*ARGSUSED*/ 1507c478bd9Sstevel@tonic-gate static int 1517c478bd9Sstevel@tonic-gate cpuid_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *cr, int *rval) 1527c478bd9Sstevel@tonic-gate { 1537c478bd9Sstevel@tonic-gate char areq[16]; 1547c478bd9Sstevel@tonic-gate void *ustr; 1557c478bd9Sstevel@tonic-gate 1567c478bd9Sstevel@tonic-gate switch (cmd) { 1577c478bd9Sstevel@tonic-gate case CPUID_GET_HWCAP: { 1587c478bd9Sstevel@tonic-gate STRUCT_DECL(cpuid_get_hwcap, h); 1597c478bd9Sstevel@tonic-gate 1607c478bd9Sstevel@tonic-gate STRUCT_INIT(h, mode); 1617c478bd9Sstevel@tonic-gate if (ddi_copyin((void *)arg, 1627c478bd9Sstevel@tonic-gate STRUCT_BUF(h), STRUCT_SIZE(h), mode)) 1637c478bd9Sstevel@tonic-gate return (EFAULT); 1647c478bd9Sstevel@tonic-gate if ((ustr = STRUCT_FGETP(h, cgh_archname)) != NULL && 1657c478bd9Sstevel@tonic-gate copyinstr(ustr, areq, sizeof (areq), NULL) != 0) 1667c478bd9Sstevel@tonic-gate return (EFAULT); 1677c478bd9Sstevel@tonic-gate areq[sizeof (areq) - 1] = '\0'; 1687c478bd9Sstevel@tonic-gate 169ebb8ac07SRobert Mustacchi if (strcmp(areq, architecture) == 0) { 170ebb8ac07SRobert Mustacchi STRUCT_FSET(h, cgh_hwcap[0], auxv_hwcap); 171ebb8ac07SRobert Mustacchi STRUCT_FSET(h, cgh_hwcap[1], auxv_hwcap_2); 1727c478bd9Sstevel@tonic-gate #if defined(_SYSCALL32_IMPL) 173ebb8ac07SRobert Mustacchi } else if (strcmp(areq, architecture_32) == 0) { 174ebb8ac07SRobert Mustacchi STRUCT_FSET(h, cgh_hwcap[0], auxv_hwcap32); 175ebb8ac07SRobert Mustacchi STRUCT_FSET(h, cgh_hwcap[1], auxv_hwcap32_2); 1767c478bd9Sstevel@tonic-gate #endif 177ebb8ac07SRobert Mustacchi } else { 178ebb8ac07SRobert Mustacchi STRUCT_FSET(h, cgh_hwcap[0], 0); 179ebb8ac07SRobert Mustacchi STRUCT_FSET(h, cgh_hwcap[1], 0); 180ebb8ac07SRobert Mustacchi } 1817c478bd9Sstevel@tonic-gate if (ddi_copyout(STRUCT_BUF(h), 1827c478bd9Sstevel@tonic-gate (void *)arg, STRUCT_SIZE(h), mode)) 1837c478bd9Sstevel@tonic-gate return (EFAULT); 1847c478bd9Sstevel@tonic-gate return (0); 1857c478bd9Sstevel@tonic-gate } 1867c478bd9Sstevel@tonic-gate 187*12596538SJohn Levon #ifdef __x86 188*12596538SJohn Levon case CPUID_RDMSR: { 189*12596538SJohn Levon struct cpuid_rdmsr crm = { 0, }; 190*12596538SJohn Levon label_t label; 191*12596538SJohn Levon 192*12596538SJohn Levon if (secpolicy_sys_config(cr, B_FALSE) != 0) 193*12596538SJohn Levon return (EPERM); 194*12596538SJohn Levon 195*12596538SJohn Levon if (ddi_copyin((void *)arg, &crm, sizeof (crm), mode)) 196*12596538SJohn Levon return (EFAULT); 197*12596538SJohn Levon 198*12596538SJohn Levon kpreempt_disable(); 199*12596538SJohn Levon 200*12596538SJohn Levon if (on_fault(&label)) { 201*12596538SJohn Levon kpreempt_enable(); 202*12596538SJohn Levon return (ENOENT); 203*12596538SJohn Levon } 204*12596538SJohn Levon 205*12596538SJohn Levon crm.cr_msr_val = rdmsr(crm.cr_msr_nr); 206*12596538SJohn Levon 207*12596538SJohn Levon no_fault(); 208*12596538SJohn Levon kpreempt_enable(); 209*12596538SJohn Levon 210*12596538SJohn Levon if (ddi_copyout(&crm, (void *)arg, sizeof (crm), mode)) 211*12596538SJohn Levon return (EFAULT); 212*12596538SJohn Levon return (0); 213*12596538SJohn Levon } 214*12596538SJohn Levon #endif 215*12596538SJohn Levon 2167c478bd9Sstevel@tonic-gate default: 2177c478bd9Sstevel@tonic-gate return (ENOTTY); 2187c478bd9Sstevel@tonic-gate } 2197c478bd9Sstevel@tonic-gate } 2207c478bd9Sstevel@tonic-gate 2217c478bd9Sstevel@tonic-gate static struct cb_ops cpuid_cb_ops = { 2227c478bd9Sstevel@tonic-gate cpuid_open, 2237c478bd9Sstevel@tonic-gate nulldev, /* close */ 2247c478bd9Sstevel@tonic-gate nodev, /* strategy */ 2257c478bd9Sstevel@tonic-gate nodev, /* print */ 2267c478bd9Sstevel@tonic-gate nodev, /* dump */ 2277c478bd9Sstevel@tonic-gate cpuid_read, 2287c478bd9Sstevel@tonic-gate nodev, /* write */ 2297c478bd9Sstevel@tonic-gate cpuid_ioctl, 2307c478bd9Sstevel@tonic-gate nodev, /* devmap */ 2317c478bd9Sstevel@tonic-gate nodev, /* mmap */ 2327c478bd9Sstevel@tonic-gate nodev, /* segmap */ 2337c478bd9Sstevel@tonic-gate nochpoll, /* poll */ 2347c478bd9Sstevel@tonic-gate ddi_prop_op, 2357c478bd9Sstevel@tonic-gate NULL, 2367c478bd9Sstevel@tonic-gate D_64BIT | D_NEW | D_MP 2377c478bd9Sstevel@tonic-gate }; 2387c478bd9Sstevel@tonic-gate 2397c478bd9Sstevel@tonic-gate static struct dev_ops cpuid_dv_ops = { 2407c478bd9Sstevel@tonic-gate DEVO_REV, 2417c478bd9Sstevel@tonic-gate 0, 2427c478bd9Sstevel@tonic-gate cpuid_getinfo, 2437c478bd9Sstevel@tonic-gate nulldev, /* identify */ 2447c478bd9Sstevel@tonic-gate nulldev, /* probe */ 2457c478bd9Sstevel@tonic-gate cpuid_attach, 2467c478bd9Sstevel@tonic-gate cpuid_detach, 2477c478bd9Sstevel@tonic-gate nodev, /* reset */ 2487c478bd9Sstevel@tonic-gate &cpuid_cb_ops, 24919397407SSherry Moore (struct bus_ops *)0, 25019397407SSherry Moore NULL, 25119397407SSherry Moore ddi_quiesce_not_needed, /* quiesce */ 2527c478bd9Sstevel@tonic-gate }; 2537c478bd9Sstevel@tonic-gate 2547c478bd9Sstevel@tonic-gate static struct modldrv modldrv = { 2557c478bd9Sstevel@tonic-gate &mod_driverops, 25619397407SSherry Moore "cpuid driver", 2577c478bd9Sstevel@tonic-gate &cpuid_dv_ops 2587c478bd9Sstevel@tonic-gate }; 2597c478bd9Sstevel@tonic-gate 2607c478bd9Sstevel@tonic-gate static struct modlinkage modl = { 2617c478bd9Sstevel@tonic-gate MODREV_1, 2627c478bd9Sstevel@tonic-gate &modldrv 2637c478bd9Sstevel@tonic-gate }; 2647c478bd9Sstevel@tonic-gate 2657c478bd9Sstevel@tonic-gate int 2667c478bd9Sstevel@tonic-gate _init(void) 2677c478bd9Sstevel@tonic-gate { 2687c478bd9Sstevel@tonic-gate return (mod_install(&modl)); 2697c478bd9Sstevel@tonic-gate } 2707c478bd9Sstevel@tonic-gate 2717c478bd9Sstevel@tonic-gate int 2727c478bd9Sstevel@tonic-gate _fini(void) 2737c478bd9Sstevel@tonic-gate { 2747c478bd9Sstevel@tonic-gate return (mod_remove(&modl)); 2757c478bd9Sstevel@tonic-gate } 2767c478bd9Sstevel@tonic-gate 2777c478bd9Sstevel@tonic-gate int 2787c478bd9Sstevel@tonic-gate _info(struct modinfo *modinfo) 2797c478bd9Sstevel@tonic-gate { 2807c478bd9Sstevel@tonic-gate return (mod_info(&modl, modinfo)); 2817c478bd9Sstevel@tonic-gate } 282