1 /* 2 * Copyright (C) 2010,2012 Freescale Semiconductor, Inc. All rights reserved. 3 * 4 * Author: Varun Sethi, <varun.sethi@freescale.com> 5 * 6 * Description: 7 * This file is derived from arch/powerpc/kvm/e500.c, 8 * by Yu Liu <yu.liu@freescale.com>. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License, version 2, as 12 * published by the Free Software Foundation. 13 */ 14 15 #include <linux/kvm_host.h> 16 #include <linux/slab.h> 17 #include <linux/err.h> 18 #include <linux/export.h> 19 #include <linux/miscdevice.h> 20 #include <linux/module.h> 21 22 #include <asm/reg.h> 23 #include <asm/cputable.h> 24 #include <asm/tlbflush.h> 25 #include <asm/kvm_ppc.h> 26 #include <asm/dbell.h> 27 28 #include "booke.h" 29 #include "e500.h" 30 31 void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type) 32 { 33 enum ppc_dbell dbell_type; 34 unsigned long tag; 35 36 switch (type) { 37 case INT_CLASS_NONCRIT: 38 dbell_type = PPC_G_DBELL; 39 break; 40 case INT_CLASS_CRIT: 41 dbell_type = PPC_G_DBELL_CRIT; 42 break; 43 case INT_CLASS_MC: 44 dbell_type = PPC_G_DBELL_MC; 45 break; 46 default: 47 WARN_ONCE(1, "%s: unknown int type %d\n", __func__, type); 48 return; 49 } 50 51 52 tag = PPC_DBELL_LPID(vcpu->kvm->arch.lpid) | vcpu->vcpu_id; 53 mb(); 54 ppc_msgsnd(dbell_type, 0, tag); 55 } 56 57 /* gtlbe must not be mapped by more than one host tlb entry */ 58 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500, 59 struct kvm_book3e_206_tlb_entry *gtlbe) 60 { 61 unsigned int tid, ts; 62 gva_t eaddr; 63 u32 val, lpid; 64 unsigned long flags; 65 66 ts = get_tlb_ts(gtlbe); 67 tid = get_tlb_tid(gtlbe); 68 lpid = vcpu_e500->vcpu.kvm->arch.lpid; 69 70 /* We search the host TLB to invalidate its shadow TLB entry */ 71 val = (tid << 16) | ts; 72 eaddr = get_tlb_eaddr(gtlbe); 73 74 local_irq_save(flags); 75 76 mtspr(SPRN_MAS6, val); 77 mtspr(SPRN_MAS5, MAS5_SGS | lpid); 78 79 asm volatile("tlbsx 0, %[eaddr]\n" : : [eaddr] "r" (eaddr)); 80 val = mfspr(SPRN_MAS1); 81 if (val & MAS1_VALID) { 82 mtspr(SPRN_MAS1, val & ~MAS1_VALID); 83 asm volatile("tlbwe"); 84 } 85 mtspr(SPRN_MAS5, 0); 86 /* NOTE: tlbsx also updates mas8, so clear it for host tlbwe */ 87 mtspr(SPRN_MAS8, 0); 88 isync(); 89 90 local_irq_restore(flags); 91 } 92 93 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500) 94 { 95 unsigned long flags; 96 97 local_irq_save(flags); 98 mtspr(SPRN_MAS5, MAS5_SGS | vcpu_e500->vcpu.kvm->arch.lpid); 99 asm volatile("tlbilxlpid"); 100 mtspr(SPRN_MAS5, 0); 101 local_irq_restore(flags); 102 } 103 104 void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid) 105 { 106 vcpu->arch.pid = pid; 107 } 108 109 void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr) 110 { 111 } 112 113 static DEFINE_PER_CPU(struct kvm_vcpu *[KVMPPC_NR_LPIDS], last_vcpu_of_lpid); 114 115 static void kvmppc_core_vcpu_load_e500mc(struct kvm_vcpu *vcpu, int cpu) 116 { 117 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 118 119 kvmppc_booke_vcpu_load(vcpu, cpu); 120 121 mtspr(SPRN_LPID, vcpu->kvm->arch.lpid); 122 mtspr(SPRN_EPCR, vcpu->arch.shadow_epcr); 123 mtspr(SPRN_GPIR, vcpu->vcpu_id); 124 mtspr(SPRN_MSRP, vcpu->arch.shadow_msrp); 125 mtspr(SPRN_EPLC, vcpu->arch.eplc); 126 mtspr(SPRN_EPSC, vcpu->arch.epsc); 127 128 mtspr(SPRN_GIVPR, vcpu->arch.ivpr); 129 mtspr(SPRN_GIVOR2, vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]); 130 mtspr(SPRN_GIVOR8, vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]); 131 mtspr(SPRN_GSPRG0, (unsigned long)vcpu->arch.shared->sprg0); 132 mtspr(SPRN_GSPRG1, (unsigned long)vcpu->arch.shared->sprg1); 133 mtspr(SPRN_GSPRG2, (unsigned long)vcpu->arch.shared->sprg2); 134 mtspr(SPRN_GSPRG3, (unsigned long)vcpu->arch.shared->sprg3); 135 136 mtspr(SPRN_GSRR0, vcpu->arch.shared->srr0); 137 mtspr(SPRN_GSRR1, vcpu->arch.shared->srr1); 138 139 mtspr(SPRN_GEPR, vcpu->arch.epr); 140 mtspr(SPRN_GDEAR, vcpu->arch.shared->dar); 141 mtspr(SPRN_GESR, vcpu->arch.shared->esr); 142 143 if (vcpu->arch.oldpir != mfspr(SPRN_PIR) || 144 __get_cpu_var(last_vcpu_of_lpid)[vcpu->kvm->arch.lpid] != vcpu) { 145 kvmppc_e500_tlbil_all(vcpu_e500); 146 __get_cpu_var(last_vcpu_of_lpid)[vcpu->kvm->arch.lpid] = vcpu; 147 } 148 149 kvmppc_load_guest_fp(vcpu); 150 } 151 152 static void kvmppc_core_vcpu_put_e500mc(struct kvm_vcpu *vcpu) 153 { 154 vcpu->arch.eplc = mfspr(SPRN_EPLC); 155 vcpu->arch.epsc = mfspr(SPRN_EPSC); 156 157 vcpu->arch.shared->sprg0 = mfspr(SPRN_GSPRG0); 158 vcpu->arch.shared->sprg1 = mfspr(SPRN_GSPRG1); 159 vcpu->arch.shared->sprg2 = mfspr(SPRN_GSPRG2); 160 vcpu->arch.shared->sprg3 = mfspr(SPRN_GSPRG3); 161 162 vcpu->arch.shared->srr0 = mfspr(SPRN_GSRR0); 163 vcpu->arch.shared->srr1 = mfspr(SPRN_GSRR1); 164 165 vcpu->arch.epr = mfspr(SPRN_GEPR); 166 vcpu->arch.shared->dar = mfspr(SPRN_GDEAR); 167 vcpu->arch.shared->esr = mfspr(SPRN_GESR); 168 169 vcpu->arch.oldpir = mfspr(SPRN_PIR); 170 171 kvmppc_booke_vcpu_put(vcpu); 172 } 173 174 int kvmppc_core_check_processor_compat(void) 175 { 176 int r; 177 178 if (strcmp(cur_cpu_spec->cpu_name, "e500mc") == 0) 179 r = 0; 180 else if (strcmp(cur_cpu_spec->cpu_name, "e5500") == 0) 181 r = 0; 182 else 183 r = -ENOTSUPP; 184 185 return r; 186 } 187 188 int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) 189 { 190 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 191 192 vcpu->arch.shadow_epcr = SPRN_EPCR_DSIGS | SPRN_EPCR_DGTMI | \ 193 SPRN_EPCR_DUVD; 194 #ifdef CONFIG_64BIT 195 vcpu->arch.shadow_epcr |= SPRN_EPCR_ICM; 196 #endif 197 vcpu->arch.shadow_msrp = MSRP_UCLEP | MSRP_DEP | MSRP_PMMP; 198 vcpu->arch.eplc = EPC_EGS | (vcpu->kvm->arch.lpid << EPC_ELPID_SHIFT); 199 vcpu->arch.epsc = vcpu->arch.eplc; 200 201 vcpu->arch.pvr = mfspr(SPRN_PVR); 202 vcpu_e500->svr = mfspr(SPRN_SVR); 203 204 vcpu->arch.cpu_type = KVM_CPU_E500MC; 205 206 return 0; 207 } 208 209 static int kvmppc_core_get_sregs_e500mc(struct kvm_vcpu *vcpu, 210 struct kvm_sregs *sregs) 211 { 212 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 213 214 sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM | 215 KVM_SREGS_E_PC; 216 sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL; 217 218 sregs->u.e.impl.fsl.features = 0; 219 sregs->u.e.impl.fsl.svr = vcpu_e500->svr; 220 sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0; 221 sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar; 222 223 kvmppc_get_sregs_e500_tlb(vcpu, sregs); 224 225 sregs->u.e.ivor_high[3] = 226 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR]; 227 sregs->u.e.ivor_high[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL]; 228 sregs->u.e.ivor_high[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT]; 229 230 return kvmppc_get_sregs_ivor(vcpu, sregs); 231 } 232 233 static int kvmppc_core_set_sregs_e500mc(struct kvm_vcpu *vcpu, 234 struct kvm_sregs *sregs) 235 { 236 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 237 int ret; 238 239 if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) { 240 vcpu_e500->svr = sregs->u.e.impl.fsl.svr; 241 vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0; 242 vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar; 243 } 244 245 ret = kvmppc_set_sregs_e500_tlb(vcpu, sregs); 246 if (ret < 0) 247 return ret; 248 249 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 250 return 0; 251 252 if (sregs->u.e.features & KVM_SREGS_E_PM) { 253 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = 254 sregs->u.e.ivor_high[3]; 255 } 256 257 if (sregs->u.e.features & KVM_SREGS_E_PC) { 258 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] = 259 sregs->u.e.ivor_high[4]; 260 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] = 261 sregs->u.e.ivor_high[5]; 262 } 263 264 return kvmppc_set_sregs_ivor(vcpu, sregs); 265 } 266 267 static int kvmppc_get_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id, 268 union kvmppc_one_reg *val) 269 { 270 int r = 0; 271 272 switch (id) { 273 case KVM_REG_PPC_SPRG9: 274 *val = get_reg_val(id, vcpu->arch.sprg9); 275 break; 276 default: 277 r = kvmppc_get_one_reg_e500_tlb(vcpu, id, val); 278 } 279 280 return r; 281 } 282 283 static int kvmppc_set_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id, 284 union kvmppc_one_reg *val) 285 { 286 int r = 0; 287 288 switch (id) { 289 case KVM_REG_PPC_SPRG9: 290 vcpu->arch.sprg9 = set_reg_val(id, *val); 291 break; 292 default: 293 r = kvmppc_set_one_reg_e500_tlb(vcpu, id, val); 294 } 295 296 return r; 297 } 298 299 static struct kvm_vcpu *kvmppc_core_vcpu_create_e500mc(struct kvm *kvm, 300 unsigned int id) 301 { 302 struct kvmppc_vcpu_e500 *vcpu_e500; 303 struct kvm_vcpu *vcpu; 304 int err; 305 306 vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); 307 if (!vcpu_e500) { 308 err = -ENOMEM; 309 goto out; 310 } 311 vcpu = &vcpu_e500->vcpu; 312 313 /* Invalid PIR value -- this LPID dosn't have valid state on any cpu */ 314 vcpu->arch.oldpir = 0xffffffff; 315 316 err = kvm_vcpu_init(vcpu, kvm, id); 317 if (err) 318 goto free_vcpu; 319 320 err = kvmppc_e500_tlb_init(vcpu_e500); 321 if (err) 322 goto uninit_vcpu; 323 324 vcpu->arch.shared = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO); 325 if (!vcpu->arch.shared) 326 goto uninit_tlb; 327 328 return vcpu; 329 330 uninit_tlb: 331 kvmppc_e500_tlb_uninit(vcpu_e500); 332 uninit_vcpu: 333 kvm_vcpu_uninit(vcpu); 334 335 free_vcpu: 336 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 337 out: 338 return ERR_PTR(err); 339 } 340 341 static void kvmppc_core_vcpu_free_e500mc(struct kvm_vcpu *vcpu) 342 { 343 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 344 345 free_page((unsigned long)vcpu->arch.shared); 346 kvmppc_e500_tlb_uninit(vcpu_e500); 347 kvm_vcpu_uninit(vcpu); 348 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 349 } 350 351 static int kvmppc_core_init_vm_e500mc(struct kvm *kvm) 352 { 353 int lpid; 354 355 lpid = kvmppc_alloc_lpid(); 356 if (lpid < 0) 357 return lpid; 358 359 kvm->arch.lpid = lpid; 360 return 0; 361 } 362 363 static void kvmppc_core_destroy_vm_e500mc(struct kvm *kvm) 364 { 365 kvmppc_free_lpid(kvm->arch.lpid); 366 } 367 368 static struct kvmppc_ops kvm_ops_e500mc = { 369 .get_sregs = kvmppc_core_get_sregs_e500mc, 370 .set_sregs = kvmppc_core_set_sregs_e500mc, 371 .get_one_reg = kvmppc_get_one_reg_e500mc, 372 .set_one_reg = kvmppc_set_one_reg_e500mc, 373 .vcpu_load = kvmppc_core_vcpu_load_e500mc, 374 .vcpu_put = kvmppc_core_vcpu_put_e500mc, 375 .vcpu_create = kvmppc_core_vcpu_create_e500mc, 376 .vcpu_free = kvmppc_core_vcpu_free_e500mc, 377 .mmu_destroy = kvmppc_mmu_destroy_e500, 378 .init_vm = kvmppc_core_init_vm_e500mc, 379 .destroy_vm = kvmppc_core_destroy_vm_e500mc, 380 .emulate_op = kvmppc_core_emulate_op_e500, 381 .emulate_mtspr = kvmppc_core_emulate_mtspr_e500, 382 .emulate_mfspr = kvmppc_core_emulate_mfspr_e500, 383 }; 384 385 static int __init kvmppc_e500mc_init(void) 386 { 387 int r; 388 389 r = kvmppc_booke_init(); 390 if (r) 391 goto err_out; 392 393 kvmppc_init_lpid(64); 394 kvmppc_claim_lpid(0); /* host */ 395 396 r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE); 397 if (r) 398 goto err_out; 399 kvm_ops_e500mc.owner = THIS_MODULE; 400 kvmppc_pr_ops = &kvm_ops_e500mc; 401 402 err_out: 403 return r; 404 } 405 406 static void __exit kvmppc_e500mc_exit(void) 407 { 408 kvmppc_pr_ops = NULL; 409 kvmppc_booke_exit(); 410 } 411 412 module_init(kvmppc_e500mc_init); 413 module_exit(kvmppc_e500mc_exit); 414 MODULE_ALIAS_MISCDEV(KVM_MINOR); 415 MODULE_ALIAS("devname:kvm"); 416