Pileus Git - ~andy/linux/blob - arch/powerpc/kvm/e500.c

   1 /*
   2  * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
   3  *
   4  * Author: Yu Liu, <yu.liu@freescale.com>
   5  *
   6  * Description:
   7  * This file is derived from arch/powerpc/kvm/44x.c,
   8  * by Hollis Blanchard <hollisb@us.ibm.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_e500.h>
  24 #include <asm/kvm_ppc.h>
  25
  26 #include "booke.h"
  27 #include "e500.h"
  28
  29 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
  30 {
  31 }
  32
  33 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
  34 {
  35 }
  36
  37 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
  38 {
  39         kvmppc_booke_vcpu_load(vcpu, cpu);
  40         kvmppc_e500_tlb_load(vcpu, cpu);
  41 }
  42
  43 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
  44 {
  45         kvmppc_e500_tlb_put(vcpu);
  46
  47 #ifdef CONFIG_SPE
  48         if (vcpu->arch.shadow_msr & MSR_SPE)
  49                 kvmppc_vcpu_disable_spe(vcpu);
  50 #endif
  51
  52         kvmppc_booke_vcpu_put(vcpu);
  53 }
  54
  55 int kvmppc_core_check_processor_compat(void)
  56 {
  57         int r;
  58
  59         if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0)
  60                 r = 0;
  61         else
  62                 r = -ENOTSUPP;
  63
  64         return r;
  65 }
  66
  67 int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
  68 {
  69         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
  70
  71         kvmppc_e500_tlb_setup(vcpu_e500);
  72
  73         /* Registers init */
  74         vcpu->arch.pvr = mfspr(SPRN_PVR);
  75         vcpu_e500->svr = mfspr(SPRN_SVR);
  76
  77         vcpu->arch.cpu_type = KVM_CPU_E500V2;
  78
  79         return 0;
  80 }
  81
  82 /* 'linear_address' is actually an encoding of AS|PID|EADDR . */
  83 int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
  84                                struct kvm_translation *tr)
  85 {
  86         int index;
  87         gva_t eaddr;
  88         u8 pid;
  89         u8 as;
  90
  91         eaddr = tr->linear_address;
  92         pid = (tr->linear_address >> 32) & 0xff;
  93         as = (tr->linear_address >> 40) & 0x1;
  94
  95         index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
  96         if (index < 0) {
  97                 tr->valid = 0;
  98                 return 0;
  99         }
 100
 101         tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
 102         /* XXX what does "writeable" and "usermode" even mean? */
 103         tr->valid = 1;
 104
 105         return 0;
 106 }
 107
 108 void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 109 {
 110         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 111
 112         sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_SPE |
 113                                KVM_SREGS_E_PM;
 114         sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL;
 115
 116         sregs->u.e.impl.fsl.features = 0;
 117         sregs->u.e.impl.fsl.svr = vcpu_e500->svr;
 118         sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
 119         sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
 120
 121         sregs->u.e.mas0 = vcpu->arch.shared->mas0;
 122         sregs->u.e.mas1 = vcpu->arch.shared->mas1;
 123         sregs->u.e.mas2 = vcpu->arch.shared->mas2;
 124         sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3;
 125         sregs->u.e.mas4 = vcpu->arch.shared->mas4;
 126         sregs->u.e.mas6 = vcpu->arch.shared->mas6;
 127
 128         sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG);
 129         sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg;
 130         sregs->u.e.tlbcfg[1] = vcpu_e500->tlb1cfg;
 131         sregs->u.e.tlbcfg[2] = 0;
 132         sregs->u.e.tlbcfg[3] = 0;
 133
 134         sregs->u.e.ivor_high[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
 135         sregs->u.e.ivor_high[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
 136         sregs->u.e.ivor_high[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
 137         sregs->u.e.ivor_high[3] =
 138                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
 139
 140         kvmppc_get_sregs_ivor(vcpu, sregs);
 141 }
 142
 143 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 144 {
 145         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 146
 147         if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
 148                 vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
 149                 vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0;
 150                 vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
 151         }
 152
 153         if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
 154                 vcpu->arch.shared->mas0 = sregs->u.e.mas0;
 155                 vcpu->arch.shared->mas1 = sregs->u.e.mas1;
 156                 vcpu->arch.shared->mas2 = sregs->u.e.mas2;
 157                 vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3;
 158                 vcpu->arch.shared->mas4 = sregs->u.e.mas4;
 159                 vcpu->arch.shared->mas6 = sregs->u.e.mas6;
 160         }
 161
 162         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
 163                 return 0;
 164
 165         if (sregs->u.e.features & KVM_SREGS_E_SPE) {
 166                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] =
 167                         sregs->u.e.ivor_high[0];
 168                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] =
 169                         sregs->u.e.ivor_high[1];
 170                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] =
 171                         sregs->u.e.ivor_high[2];
 172         }
 173
 174         if (sregs->u.e.features & KVM_SREGS_E_PM) {
 175                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] =
 176                         sregs->u.e.ivor_high[3];
 177         }
 178
 179         return kvmppc_set_sregs_ivor(vcpu, sregs);
 180 }
 181
 182 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 183 {
 184         struct kvmppc_vcpu_e500 *vcpu_e500;
 185         struct kvm_vcpu *vcpu;
 186         int err;
 187
 188         vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
 189         if (!vcpu_e500) {
 190                 err = -ENOMEM;
 191                 goto out;
 192         }
 193
 194         vcpu = &vcpu_e500->vcpu;
 195         err = kvm_vcpu_init(vcpu, kvm, id);
 196         if (err)
 197                 goto free_vcpu;
 198
 199         err = kvmppc_e500_tlb_init(vcpu_e500);
 200         if (err)
 201                 goto uninit_vcpu;
 202
 203         vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
 204         if (!vcpu->arch.shared)
 205                 goto uninit_tlb;
 206
 207         return vcpu;
 208
 209 uninit_tlb:
 210         kvmppc_e500_tlb_uninit(vcpu_e500);
 211 uninit_vcpu:
 212         kvm_vcpu_uninit(vcpu);
 213 free_vcpu:
 214         kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
 215 out:
 216         return ERR_PTR(err);
 217 }
 218
 219 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 220 {
 221         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 222
 223         free_page((unsigned long)vcpu->arch.shared);
 224         kvm_vcpu_uninit(vcpu);
 225         kvmppc_e500_tlb_uninit(vcpu_e500);
 226         kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
 227 }
 228
 229 int kvmppc_core_init_vm(struct kvm *kvm)
 230 {
 231         return 0;
 232 }
 233
 234 void kvmppc_core_destroy_vm(struct kvm *kvm)
 235 {
 236 }
 237
 238 static int __init kvmppc_e500_init(void)
 239 {
 240         int r, i;
 241         unsigned long ivor[3];
 242         unsigned long max_ivor = 0;
 243
 244         r = kvmppc_core_check_processor_compat();
 245         if (r)
 246                 return r;
 247
 248         r = kvmppc_booke_init();
 249         if (r)
 250                 return r;
 251
 252         /* copy extra E500 exception handlers */
 253         ivor[0] = mfspr(SPRN_IVOR32);
 254         ivor[1] = mfspr(SPRN_IVOR33);
 255         ivor[2] = mfspr(SPRN_IVOR34);
 256         for (i = 0; i < 3; i++) {
 257                 if (ivor[i] > max_ivor)
 258                         max_ivor = ivor[i];
 259
 260                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 261                        kvmppc_handlers_start + (i + 16) * kvmppc_handler_len,
 262                        kvmppc_handler_len);
 263         }
 264         flush_icache_range(kvmppc_booke_handlers,
 265                         kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 266
 267         return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
 268 }
 269
 270 static void __exit kvmppc_e500_exit(void)
 271 {
 272         kvmppc_booke_exit();
 273 }
 274
 275 module_init(kvmppc_e500_init);
 276 module_exit(kvmppc_e500_exit);