1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 /* 27 * Copyright (c) 2010, Intel Corporation. 28 * All rights reserved. 29 */ 30 31 /* 32 * Generic x86 CPU Module 33 * 34 * This CPU module is used for generic x86 CPUs when Solaris has no other 35 * CPU-specific support module available. Code in this module should be the 36 * absolute bare-bones support and must be cognizant of both Intel and AMD etc. 37 */ 38 39 #include <sys/types.h> 40 #include <sys/cpu_module_impl.h> 41 #include <sys/cpuvar.h> 42 #include <sys/kmem.h> 43 #include <sys/modctl.h> 44 #include <sys/pghw.h> 45 46 #include "gcpu.h" 47 48 /* 49 * Prevent generic cpu support from loading. 50 */ 51 int gcpu_disable = 0; 52 53 #define GCPU_MAX_CHIPID 32 54 static struct gcpu_chipshared *gcpu_shared[GCPU_MAX_CHIPID]; 55 56 /* 57 * Our cmi_init entry point, called during startup of each cpu instance. 58 */ 59 int 60 gcpu_init(cmi_hdl_t hdl, void **datap) 61 { 62 uint_t chipid = cmi_hdl_chipid(hdl); 63 struct gcpu_chipshared *sp, *osp; 64 gcpu_data_t *gcpu; 65 66 if (gcpu_disable || chipid >= GCPU_MAX_CHIPID) 67 return (ENOTSUP); 68 69 /* 70 * Allocate the state structure for this cpu. We will only 71 * allocate the bank logout areas in gcpu_mca_init once we 72 * know how many banks there are. 73 */ 74 gcpu = *datap = kmem_zalloc(sizeof (gcpu_data_t), KM_SLEEP); 75 cmi_hdl_hold(hdl); /* release in gcpu_fini */ 76 gcpu->gcpu_hdl = hdl; 77 78 /* 79 * Allocate a chipshared structure if no sibling cpu has already 80 * allocated it, but allow for the fact that a sibling core may 81 * be starting up in parallel. 82 */ 83 if ((sp = gcpu_shared[chipid]) == NULL) { 84 sp = kmem_zalloc(sizeof (struct gcpu_chipshared), KM_SLEEP); 85 mutex_init(&sp->gcpus_poll_lock, NULL, MUTEX_DRIVER, NULL); 86 mutex_init(&sp->gcpus_cfglock, NULL, MUTEX_DRIVER, NULL); 87 osp = atomic_cas_ptr(&gcpu_shared[chipid], NULL, sp); 88 if (osp != NULL) { 89 mutex_destroy(&sp->gcpus_cfglock); 90 mutex_destroy(&sp->gcpus_poll_lock); 91 kmem_free(sp, sizeof (struct gcpu_chipshared)); 92 sp = osp; 93 } 94 } 95 96 atomic_inc_32(&sp->gcpus_actv_cnt); 97 gcpu->gcpu_shared = sp; 98 99 return (0); 100 } 101 102 /* 103 * deconfigure gcpu_init() 104 */ 105 void 106 gcpu_fini(cmi_hdl_t hdl) 107 { 108 uint_t chipid = cmi_hdl_chipid(hdl); 109 gcpu_data_t *gcpu = cmi_hdl_getcmidata(hdl); 110 struct gcpu_chipshared *sp; 111 112 if (gcpu_disable || chipid >= GCPU_MAX_CHIPID) 113 return; 114 115 gcpu_mca_fini(hdl); 116 117 /* 118 * Keep shared data in cache for reuse. 119 */ 120 sp = gcpu_shared[chipid]; 121 ASSERT(sp != NULL); 122 atomic_dec_32(&sp->gcpus_actv_cnt); 123 124 if (gcpu != NULL) 125 kmem_free(gcpu, sizeof (gcpu_data_t)); 126 127 /* Release reference count held in gcpu_init(). */ 128 cmi_hdl_rele(hdl); 129 } 130 131 void 132 gcpu_post_startup(cmi_hdl_t hdl) 133 { 134 gcpu_data_t *gcpu = cmi_hdl_getcmidata(hdl); 135 136 if (gcpu_disable) 137 return; 138 139 if (gcpu != NULL) 140 cms_post_startup(hdl); 141 #ifdef __xpv 142 /* 143 * All cpu handles are initialized so we can begin polling now. 144 * Furthermore, our virq mechanism requires that everything 145 * be run on cpu 0 so we can assure that by starting from here. 146 */ 147 gcpu_mca_poll_start(hdl); 148 #endif 149 } 150 151 void 152 gcpu_post_mpstartup(cmi_hdl_t hdl) 153 { 154 if (gcpu_disable) 155 return; 156 157 cms_post_mpstartup(hdl); 158 159 #ifndef __xpv 160 /* 161 * All cpu handles are initialized only once all cpus 162 * are started, so we can begin polling post mp startup. 163 */ 164 gcpu_mca_poll_start(hdl); 165 #endif 166 } 167 168 #ifdef __xpv 169 #define GCPU_OP(ntvop, xpvop) xpvop 170 #else 171 #define GCPU_OP(ntvop, xpvop) ntvop 172 #endif 173 174 cmi_api_ver_t _cmi_api_version = CMI_API_VERSION_3; 175 176 const cmi_ops_t _cmi_ops = { 177 gcpu_init, /* cmi_init */ 178 gcpu_post_startup, /* cmi_post_startup */ 179 gcpu_post_mpstartup, /* cmi_post_mpstartup */ 180 gcpu_faulted_enter, /* cmi_faulted_enter */ 181 gcpu_faulted_exit, /* cmi_faulted_exit */ 182 gcpu_mca_init, /* cmi_mca_init */ 183 GCPU_OP(gcpu_mca_trap, NULL), /* cmi_mca_trap */ 184 GCPU_OP(gcpu_cmci_trap, NULL), /* cmi_cmci_trap */ 185 gcpu_msrinject, /* cmi_msrinject */ 186 GCPU_OP(gcpu_hdl_poke, NULL), /* cmi_hdl_poke */ 187 gcpu_fini, /* cmi_fini */ 188 GCPU_OP(NULL, gcpu_xpv_panic_callback), /* cmi_panic_callback */ 189 }; 190 191 static struct modlcpu modlcpu = { 192 &mod_cpuops, 193 "Generic x86 CPU Module" 194 }; 195 196 static struct modlinkage modlinkage = { 197 MODREV_1, 198 (void *)&modlcpu, 199 NULL 200 }; 201 202 int 203 _init(void) 204 { 205 return (mod_install(&modlinkage)); 206 } 207 208 int 209 _info(struct modinfo *modinfop) 210 { 211 return (mod_info(&modlinkage, modinfop)); 212 } 213 214 int 215 _fini(void) 216 { 217 return (mod_remove(&modlinkage)); 218 } 219