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_tlb.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_e500_tlb_load(vcpu, cpu); 40 } 41 42 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) 43 { 44 kvmppc_e500_tlb_put(vcpu); 45 46 #ifdef CONFIG_SPE 47 if (vcpu->arch.shadow_msr & MSR_SPE) 48 kvmppc_vcpu_disable_spe(vcpu); 49 #endif 50 } 51 52 int kvmppc_core_check_processor_compat(void) 53 { 54 int r; 55 56 if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0) 57 r = 0; 58 else 59 r = -ENOTSUPP; 60 61 return r; 62 } 63 64 int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) 65 { 66 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 67 68 kvmppc_e500_tlb_setup(vcpu_e500); 69 70 /* Registers init */ 71 vcpu->arch.pvr = mfspr(SPRN_PVR); 72 vcpu_e500->svr = mfspr(SPRN_SVR); 73 74 /* Since booke kvm only support one core, update all vcpus' PIR to 0 */ 75 vcpu->vcpu_id = 0; 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_e500->mas0; 122 sregs->u.e.mas1 = vcpu_e500->mas1; 123 sregs->u.e.mas2 = vcpu_e500->mas2; 124 sregs->u.e.mas7_3 = ((u64)vcpu_e500->mas7 << 32) | vcpu_e500->mas3; 125 sregs->u.e.mas4 = vcpu_e500->mas4; 126 sregs->u.e.mas6 = vcpu_e500->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_e500->mas0 = sregs->u.e.mas0; 155 vcpu_e500->mas1 = sregs->u.e.mas1; 156 vcpu_e500->mas2 = sregs->u.e.mas2; 157 vcpu_e500->mas7 = sregs->u.e.mas7_3 >> 32; 158 vcpu_e500->mas3 = (u32)sregs->u.e.mas7_3; 159 vcpu_e500->mas4 = sregs->u.e.mas4; 160 vcpu_e500->mas6 = sregs->u.e.mas6; 161 } 162 163 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 164 return 0; 165 166 if (sregs->u.e.features & KVM_SREGS_E_SPE) { 167 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] = 168 sregs->u.e.ivor_high[0]; 169 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] = 170 sregs->u.e.ivor_high[1]; 171 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] = 172 sregs->u.e.ivor_high[2]; 173 } 174 175 if (sregs->u.e.features & KVM_SREGS_E_PM) { 176 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = 177 sregs->u.e.ivor_high[3]; 178 } 179 180 return kvmppc_set_sregs_ivor(vcpu, sregs); 181 } 182 183 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) 184 { 185 struct kvmppc_vcpu_e500 *vcpu_e500; 186 struct kvm_vcpu *vcpu; 187 int err; 188 189 vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); 190 if (!vcpu_e500) { 191 err = -ENOMEM; 192 goto out; 193 } 194 195 vcpu = &vcpu_e500->vcpu; 196 err = kvm_vcpu_init(vcpu, kvm, id); 197 if (err) 198 goto free_vcpu; 199 200 err = kvmppc_e500_tlb_init(vcpu_e500); 201 if (err) 202 goto uninit_vcpu; 203 204 vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO); 205 if (!vcpu->arch.shared) 206 goto uninit_tlb; 207 208 return vcpu; 209 210 uninit_tlb: 211 kvmppc_e500_tlb_uninit(vcpu_e500); 212 uninit_vcpu: 213 kvm_vcpu_uninit(vcpu); 214 free_vcpu: 215 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 216 out: 217 return ERR_PTR(err); 218 } 219 220 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) 221 { 222 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 223 224 free_page((unsigned long)vcpu->arch.shared); 225 kvm_vcpu_uninit(vcpu); 226 kvmppc_e500_tlb_uninit(vcpu_e500); 227 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 228 } 229 230 static int __init kvmppc_e500_init(void) 231 { 232 int r, i; 233 unsigned long ivor[3]; 234 unsigned long max_ivor = 0; 235 236 r = kvmppc_booke_init(); 237 if (r) 238 return r; 239 240 /* copy extra E500 exception handlers */ 241 ivor[0] = mfspr(SPRN_IVOR32); 242 ivor[1] = mfspr(SPRN_IVOR33); 243 ivor[2] = mfspr(SPRN_IVOR34); 244 for (i = 0; i < 3; i++) { 245 if (ivor[i] > max_ivor) 246 max_ivor = ivor[i]; 247 248 memcpy((void *)kvmppc_booke_handlers + ivor[i], 249 kvmppc_handlers_start + (i + 16) * kvmppc_handler_len, 250 kvmppc_handler_len); 251 } 252 flush_icache_range(kvmppc_booke_handlers, 253 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); 254 255 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE); 256 } 257 258 static void __exit kvmppc_e500_exit(void) 259 { 260 kvmppc_booke_exit(); 261 } 262 263 module_init(kvmppc_e500_init); 264 module_exit(kvmppc_e500_exit); 265