arch/powerpc/kvm/e500.c

   1 /*
   2  * Copyright (C) 2008 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
  19 #include <asm/reg.h>
  20 #include <asm/cputable.h>
  21 #include <asm/tlbflush.h>
  22 #include <asm/kvm_e500.h>
  23 #include <asm/kvm_ppc.h>
  24
  25 #include "booke.h"
  26 #include "e500_tlb.h"
  27
  28 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
  29 {
  30 }
  31
  32 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
  33 {
  34 }
  35
  36 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
  37 {
  38         kvmppc_e500_tlb_load(vcpu, cpu);
  39 }
  40
  41 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
  42 {
  43         kvmppc_e500_tlb_put(vcpu);
  44 }
  45
  46 int kvmppc_core_check_processor_compat(void)
  47 {
  48         int r;
  49
  50         if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0)
  51                 r = 0;
  52         else
  53                 r = -ENOTSUPP;
  54
  55         return r;
  56 }
  57
  58 int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
  59 {
  60         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
  61
  62         kvmppc_e500_tlb_setup(vcpu_e500);
  63
  64         /* Registers init */
  65         vcpu->arch.pvr = mfspr(SPRN_PVR);
  66         vcpu_e500->svr = mfspr(SPRN_SVR);
  67
  68         /* Since booke kvm only support one core, update all vcpus' PIR to 0 */
  69         vcpu->vcpu_id = 0;
  70
  71         return 0;
  72 }
  73
  74 /* 'linear_address' is actually an encoding of AS|PID|EADDR . */
  75 int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
  76                                struct kvm_translation *tr)
  77 {
  78         int index;
  79         gva_t eaddr;
  80         u8 pid;
  81         u8 as;
  82
  83         eaddr = tr->linear_address;
  84         pid = (tr->linear_address >> 32) & 0xff;
  85         as = (tr->linear_address >> 40) & 0x1;
  86
  87         index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
  88         if (index < 0) {
  89                 tr->valid = 0;
  90                 return 0;
  91         }
  92
  93         tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
  94         /* XXX what does "writeable" and "usermode" even mean? */
  95         tr->valid = 1;
  96
  97         return 0;
  98 }
  99
 100 void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 101 {
 102         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 103
 104         sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_SPE |
 105                                KVM_SREGS_E_PM;
 106         sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL;
 107
 108         sregs->u.e.impl.fsl.features = 0;
 109         sregs->u.e.impl.fsl.svr = vcpu_e500->svr;
 110         sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
 111         sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
 112
 113         sregs->u.e.mas0 = vcpu_e500->mas0;
 114         sregs->u.e.mas1 = vcpu_e500->mas1;
 115         sregs->u.e.mas2 = vcpu_e500->mas2;
 116         sregs->u.e.mas7_3 = ((u64)vcpu_e500->mas7 << 32) | vcpu_e500->mas3;
 117         sregs->u.e.mas4 = vcpu_e500->mas4;
 118         sregs->u.e.mas6 = vcpu_e500->mas6;
 119
 120         sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG);
 121         sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg;
 122         sregs->u.e.tlbcfg[1] = vcpu_e500->tlb1cfg;
 123         sregs->u.e.tlbcfg[2] = 0;
 124         sregs->u.e.tlbcfg[3] = 0;
 125
 126         sregs->u.e.ivor_high[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
 127         sregs->u.e.ivor_high[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
 128         sregs->u.e.ivor_high[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
 129         sregs->u.e.ivor_high[3] =
 130                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
 131
 132         kvmppc_get_sregs_ivor(vcpu, sregs);
 133 }
 134
 135 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 136 {
 137         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 138
 139         if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
 140                 vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
 141                 vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0;
 142                 vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
 143         }
 144
 145         if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
 146                 vcpu_e500->mas0 = sregs->u.e.mas0;
 147                 vcpu_e500->mas1 = sregs->u.e.mas1;
 148                 vcpu_e500->mas2 = sregs->u.e.mas2;
 149                 vcpu_e500->mas7 = sregs->u.e.mas7_3 >> 32;
 150                 vcpu_e500->mas3 = (u32)sregs->u.e.mas7_3;
 151                 vcpu_e500->mas4 = sregs->u.e.mas4;
 152                 vcpu_e500->mas6 = sregs->u.e.mas6;
 153         }
 154
 155         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
 156                 return 0;
 157
 158         if (sregs->u.e.features & KVM_SREGS_E_SPE) {
 159                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] =
 160                         sregs->u.e.ivor_high[0];
 161                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] =
 162                         sregs->u.e.ivor_high[1];
 163                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] =
 164                         sregs->u.e.ivor_high[2];
 165         }
 166
 167         if (sregs->u.e.features & KVM_SREGS_E_PM) {
 168                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] =
 169                         sregs->u.e.ivor_high[3];
 170         }
 171
 172         return kvmppc_set_sregs_ivor(vcpu, sregs);
 173 }
 174
 175 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 176 {
 177         struct kvmppc_vcpu_e500 *vcpu_e500;
 178         struct kvm_vcpu *vcpu;
 179         int err;
 180
 181         vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
 182         if (!vcpu_e500) {
 183                 err = -ENOMEM;
 184                 goto out;
 185         }
 186
 187         vcpu = &vcpu_e500->vcpu;
 188         err = kvm_vcpu_init(vcpu, kvm, id);
 189         if (err)
 190                 goto free_vcpu;
 191
 192         err = kvmppc_e500_tlb_init(vcpu_e500);
 193         if (err)
 194                 goto uninit_vcpu;
 195
 196         vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
 197         if (!vcpu->arch.shared)
 198                 goto uninit_tlb;
 199
 200         return vcpu;
 201
 202 uninit_tlb:
 203         kvmppc_e500_tlb_uninit(vcpu_e500);
 204 uninit_vcpu:
 205         kvm_vcpu_uninit(vcpu);
 206 free_vcpu:
 207         kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
 208 out:
 209         return ERR_PTR(err);
 210 }
 211
 212 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 213 {
 214         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 215
 216         free_page((unsigned long)vcpu->arch.shared);
 217         kvm_vcpu_uninit(vcpu);
 218         kvmppc_e500_tlb_uninit(vcpu_e500);
 219         kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
 220 }
 221
 222 static int __init kvmppc_e500_init(void)
 223 {
 224         int r, i;
 225         unsigned long ivor[3];
 226         unsigned long max_ivor = 0;
 227
 228         r = kvmppc_booke_init();
 229         if (r)
 230                 return r;
 231
 232         /* copy extra E500 exception handlers */
 233         ivor[0] = mfspr(SPRN_IVOR32);
 234         ivor[1] = mfspr(SPRN_IVOR33);
 235         ivor[2] = mfspr(SPRN_IVOR34);
 236         for (i = 0; i < 3; i++) {
 237                 if (ivor[i] > max_ivor)
 238                         max_ivor = ivor[i];
 239
 240                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
 241                        kvmppc_handlers_start + (i + 16) * kvmppc_handler_len,
 242                        kvmppc_handler_len);
 243         }
 244         flush_icache_range(kvmppc_booke_handlers,
 245                         kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
 246
 247         return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
 248 }
 249
 250 static void __exit kvmppc_e500_exit(void)
 251 {
 252         kvmppc_booke_exit();
 253 }
 254
 255 module_init(kvmppc_e500_init);
 256 module_exit(kvmppc_e500_exit);