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 20 #include <asm/reg.h> 21 #include <asm/cputable.h> 22 #include <asm/tlbflush.h> 23 #include <asm/kvm_ppc.h> 24 #include <asm/dbell.h> 25 26 #include "booke.h" 27 #include "e500.h" 28 29 void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type) 30 { 31 enum ppc_dbell dbell_type; 32 unsigned long tag; 33 34 switch (type) { 35 case INT_CLASS_NONCRIT: 36 dbell_type = PPC_G_DBELL; 37 break; 38 case INT_CLASS_CRIT: 39 dbell_type = PPC_G_DBELL_CRIT; 40 break; 41 case INT_CLASS_MC: 42 dbell_type = PPC_G_DBELL_MC; 43 break; 44 default: 45 WARN_ONCE(1, "%s: unknown int type %d\n", __func__, type); 46 return; 47 } 48 49 50 tag = PPC_DBELL_LPID(vcpu->kvm->arch.lpid) | vcpu->vcpu_id; 51 mb(); 52 ppc_msgsnd(dbell_type, 0, tag); 53 } 54 55 /* gtlbe must not be mapped by more than one host tlb entry */ 56 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500, 57 struct kvm_book3e_206_tlb_entry *gtlbe) 58 { 59 unsigned int tid, ts; 60 gva_t eaddr; 61 u32 val, lpid; 62 unsigned long flags; 63 64 ts = get_tlb_ts(gtlbe); 65 tid = get_tlb_tid(gtlbe); 66 lpid = vcpu_e500->vcpu.kvm->arch.lpid; 67 68 /* We search the host TLB to invalidate its shadow TLB entry */ 69 val = (tid << 16) | ts; 70 eaddr = get_tlb_eaddr(gtlbe); 71 72 local_irq_save(flags); 73 74 mtspr(SPRN_MAS6, val); 75 mtspr(SPRN_MAS5, MAS5_SGS | lpid); 76 77 asm volatile("tlbsx 0, %[eaddr]\n" : : [eaddr] "r" (eaddr)); 78 val = mfspr(SPRN_MAS1); 79 if (val & MAS1_VALID) { 80 mtspr(SPRN_MAS1, val & ~MAS1_VALID); 81 asm volatile("tlbwe"); 82 } 83 mtspr(SPRN_MAS5, 0); 84 /* NOTE: tlbsx also updates mas8, so clear it for host tlbwe */ 85 mtspr(SPRN_MAS8, 0); 86 isync(); 87 88 local_irq_restore(flags); 89 } 90 91 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500) 92 { 93 unsigned long flags; 94 95 local_irq_save(flags); 96 mtspr(SPRN_MAS5, MAS5_SGS | vcpu_e500->vcpu.kvm->arch.lpid); 97 asm volatile("tlbilxlpid"); 98 mtspr(SPRN_MAS5, 0); 99 local_irq_restore(flags); 100 } 101 102 void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid) 103 { 104 vcpu->arch.pid = pid; 105 } 106 107 void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr) 108 { 109 } 110 111 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu_on_cpu); 112 113 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 114 { 115 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 116 117 kvmppc_booke_vcpu_load(vcpu, cpu); 118 119 mtspr(SPRN_LPID, vcpu->kvm->arch.lpid); 120 mtspr(SPRN_EPCR, vcpu->arch.shadow_epcr); 121 mtspr(SPRN_GPIR, vcpu->vcpu_id); 122 mtspr(SPRN_MSRP, vcpu->arch.shadow_msrp); 123 mtspr(SPRN_EPLC, vcpu->arch.eplc); 124 mtspr(SPRN_EPSC, vcpu->arch.epsc); 125 126 mtspr(SPRN_GIVPR, vcpu->arch.ivpr); 127 mtspr(SPRN_GIVOR2, vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]); 128 mtspr(SPRN_GIVOR8, vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]); 129 mtspr(SPRN_GSPRG0, (unsigned long)vcpu->arch.shared->sprg0); 130 mtspr(SPRN_GSPRG1, (unsigned long)vcpu->arch.shared->sprg1); 131 mtspr(SPRN_GSPRG2, (unsigned long)vcpu->arch.shared->sprg2); 132 mtspr(SPRN_GSPRG3, (unsigned long)vcpu->arch.shared->sprg3); 133 134 mtspr(SPRN_GSRR0, vcpu->arch.shared->srr0); 135 mtspr(SPRN_GSRR1, vcpu->arch.shared->srr1); 136 137 mtspr(SPRN_GEPR, vcpu->arch.epr); 138 mtspr(SPRN_GDEAR, vcpu->arch.shared->dar); 139 mtspr(SPRN_GESR, vcpu->arch.shared->esr); 140 141 if (vcpu->arch.oldpir != mfspr(SPRN_PIR) || 142 __get_cpu_var(last_vcpu_on_cpu) != vcpu) { 143 kvmppc_e500_tlbil_all(vcpu_e500); 144 __get_cpu_var(last_vcpu_on_cpu) = vcpu; 145 } 146 147 kvmppc_load_guest_fp(vcpu); 148 } 149 150 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) 151 { 152 vcpu->arch.eplc = mfspr(SPRN_EPLC); 153 vcpu->arch.epsc = mfspr(SPRN_EPSC); 154 155 vcpu->arch.shared->sprg0 = mfspr(SPRN_GSPRG0); 156 vcpu->arch.shared->sprg1 = mfspr(SPRN_GSPRG1); 157 vcpu->arch.shared->sprg2 = mfspr(SPRN_GSPRG2); 158 vcpu->arch.shared->sprg3 = mfspr(SPRN_GSPRG3); 159 160 vcpu->arch.shared->srr0 = mfspr(SPRN_GSRR0); 161 vcpu->arch.shared->srr1 = mfspr(SPRN_GSRR1); 162 163 vcpu->arch.epr = mfspr(SPRN_GEPR); 164 vcpu->arch.shared->dar = mfspr(SPRN_GDEAR); 165 vcpu->arch.shared->esr = mfspr(SPRN_GESR); 166 167 vcpu->arch.oldpir = mfspr(SPRN_PIR); 168 169 kvmppc_booke_vcpu_put(vcpu); 170 } 171 172 int kvmppc_core_check_processor_compat(void) 173 { 174 int r; 175 176 if (strcmp(cur_cpu_spec->cpu_name, "e500mc") == 0) 177 r = 0; 178 else if (strcmp(cur_cpu_spec->cpu_name, "e5500") == 0) 179 r = 0; 180 else if (strcmp(cur_cpu_spec->cpu_name, "e6500") == 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 void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 210 { 211 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 212 213 sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM | 214 KVM_SREGS_E_PC; 215 sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL; 216 217 sregs->u.e.impl.fsl.features = 0; 218 sregs->u.e.impl.fsl.svr = vcpu_e500->svr; 219 sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0; 220 sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar; 221 222 kvmppc_get_sregs_e500_tlb(vcpu, sregs); 223 224 sregs->u.e.ivor_high[3] = 225 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR]; 226 sregs->u.e.ivor_high[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL]; 227 sregs->u.e.ivor_high[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT]; 228 229 kvmppc_get_sregs_ivor(vcpu, sregs); 230 } 231 232 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 233 { 234 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 235 int ret; 236 237 if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) { 238 vcpu_e500->svr = sregs->u.e.impl.fsl.svr; 239 vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0; 240 vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar; 241 } 242 243 ret = kvmppc_set_sregs_e500_tlb(vcpu, sregs); 244 if (ret < 0) 245 return ret; 246 247 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 248 return 0; 249 250 if (sregs->u.e.features & KVM_SREGS_E_PM) { 251 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = 252 sregs->u.e.ivor_high[3]; 253 } 254 255 if (sregs->u.e.features & KVM_SREGS_E_PC) { 256 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] = 257 sregs->u.e.ivor_high[4]; 258 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] = 259 sregs->u.e.ivor_high[5]; 260 } 261 262 return kvmppc_set_sregs_ivor(vcpu, sregs); 263 } 264 265 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, 266 union kvmppc_one_reg *val) 267 { 268 int r = kvmppc_get_one_reg_e500_tlb(vcpu, id, val); 269 return r; 270 } 271 272 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, 273 union kvmppc_one_reg *val) 274 { 275 int r = kvmppc_set_one_reg_e500_tlb(vcpu, id, val); 276 return r; 277 } 278 279 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) 280 { 281 struct kvmppc_vcpu_e500 *vcpu_e500; 282 struct kvm_vcpu *vcpu; 283 int err; 284 285 vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); 286 if (!vcpu_e500) { 287 err = -ENOMEM; 288 goto out; 289 } 290 vcpu = &vcpu_e500->vcpu; 291 292 /* Invalid PIR value -- this LPID dosn't have valid state on any cpu */ 293 vcpu->arch.oldpir = 0xffffffff; 294 295 err = kvm_vcpu_init(vcpu, kvm, id); 296 if (err) 297 goto free_vcpu; 298 299 err = kvmppc_e500_tlb_init(vcpu_e500); 300 if (err) 301 goto uninit_vcpu; 302 303 vcpu->arch.shared = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO); 304 if (!vcpu->arch.shared) 305 goto uninit_tlb; 306 307 return vcpu; 308 309 uninit_tlb: 310 kvmppc_e500_tlb_uninit(vcpu_e500); 311 uninit_vcpu: 312 kvm_vcpu_uninit(vcpu); 313 314 free_vcpu: 315 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 316 out: 317 return ERR_PTR(err); 318 } 319 320 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) 321 { 322 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 323 324 free_page((unsigned long)vcpu->arch.shared); 325 kvmppc_e500_tlb_uninit(vcpu_e500); 326 kvm_vcpu_uninit(vcpu); 327 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 328 } 329 330 int kvmppc_core_init_vm(struct kvm *kvm) 331 { 332 int lpid; 333 334 lpid = kvmppc_alloc_lpid(); 335 if (lpid < 0) 336 return lpid; 337 338 kvm->arch.lpid = lpid; 339 return 0; 340 } 341 342 void kvmppc_core_destroy_vm(struct kvm *kvm) 343 { 344 kvmppc_free_lpid(kvm->arch.lpid); 345 } 346 347 static int __init kvmppc_e500mc_init(void) 348 { 349 int r; 350 351 r = kvmppc_booke_init(); 352 if (r) 353 return r; 354 355 kvmppc_init_lpid(64); 356 kvmppc_claim_lpid(0); /* host */ 357 358 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE); 359 } 360 361 static void __exit kvmppc_e500mc_exit(void) 362 { 363 kvmppc_booke_exit(); 364 } 365 366 module_init(kvmppc_e500mc_init); 367 module_exit(kvmppc_e500mc_exit); 368