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 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 #ifdef CONFIG_SPE 46 if (vcpu->arch.shadow_msr & MSR_SPE) 47 kvmppc_vcpu_disable_spe(vcpu); 48 #endif 49 } 50 51 int kvmppc_core_check_processor_compat(void) 52 { 53 int r; 54 55 if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0) 56 r = 0; 57 else 58 r = -ENOTSUPP; 59 60 return r; 61 } 62 63 int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) 64 { 65 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 66 67 kvmppc_e500_tlb_setup(vcpu_e500); 68 69 /* Registers init */ 70 vcpu->arch.pvr = mfspr(SPRN_PVR); 71 vcpu_e500->svr = mfspr(SPRN_SVR); 72 73 /* Since booke kvm only support one core, update all vcpus' PIR to 0 */ 74 vcpu->vcpu_id = 0; 75 76 return 0; 77 } 78 79 /* 'linear_address' is actually an encoding of AS|PID|EADDR . */ 80 int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, 81 struct kvm_translation *tr) 82 { 83 int index; 84 gva_t eaddr; 85 u8 pid; 86 u8 as; 87 88 eaddr = tr->linear_address; 89 pid = (tr->linear_address >> 32) & 0xff; 90 as = (tr->linear_address >> 40) & 0x1; 91 92 index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as); 93 if (index < 0) { 94 tr->valid = 0; 95 return 0; 96 } 97 98 tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr); 99 /* XXX what does "writeable" and "usermode" even mean? */ 100 tr->valid = 1; 101 102 return 0; 103 } 104 105 void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 106 { 107 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 108 109 sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_SPE | 110 KVM_SREGS_E_PM; 111 sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL; 112 113 sregs->u.e.impl.fsl.features = 0; 114 sregs->u.e.impl.fsl.svr = vcpu_e500->svr; 115 sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0; 116 sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar; 117 118 sregs->u.e.mas0 = vcpu_e500->mas0; 119 sregs->u.e.mas1 = vcpu_e500->mas1; 120 sregs->u.e.mas2 = vcpu_e500->mas2; 121 sregs->u.e.mas7_3 = ((u64)vcpu_e500->mas7 << 32) | vcpu_e500->mas3; 122 sregs->u.e.mas4 = vcpu_e500->mas4; 123 sregs->u.e.mas6 = vcpu_e500->mas6; 124 125 sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG); 126 sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg; 127 sregs->u.e.tlbcfg[1] = vcpu_e500->tlb1cfg; 128 sregs->u.e.tlbcfg[2] = 0; 129 sregs->u.e.tlbcfg[3] = 0; 130 131 sregs->u.e.ivor_high[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL]; 132 sregs->u.e.ivor_high[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA]; 133 sregs->u.e.ivor_high[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND]; 134 sregs->u.e.ivor_high[3] = 135 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR]; 136 137 kvmppc_get_sregs_ivor(vcpu, sregs); 138 } 139 140 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) 141 { 142 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 143 144 if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) { 145 vcpu_e500->svr = sregs->u.e.impl.fsl.svr; 146 vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0; 147 vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar; 148 } 149 150 if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) { 151 vcpu_e500->mas0 = sregs->u.e.mas0; 152 vcpu_e500->mas1 = sregs->u.e.mas1; 153 vcpu_e500->mas2 = sregs->u.e.mas2; 154 vcpu_e500->mas7 = sregs->u.e.mas7_3 >> 32; 155 vcpu_e500->mas3 = (u32)sregs->u.e.mas7_3; 156 vcpu_e500->mas4 = sregs->u.e.mas4; 157 vcpu_e500->mas6 = sregs->u.e.mas6; 158 } 159 160 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) 161 return 0; 162 163 if (sregs->u.e.features & KVM_SREGS_E_SPE) { 164 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] = 165 sregs->u.e.ivor_high[0]; 166 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] = 167 sregs->u.e.ivor_high[1]; 168 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] = 169 sregs->u.e.ivor_high[2]; 170 } 171 172 if (sregs->u.e.features & KVM_SREGS_E_PM) { 173 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = 174 sregs->u.e.ivor_high[3]; 175 } 176 177 return kvmppc_set_sregs_ivor(vcpu, sregs); 178 } 179 180 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) 181 { 182 struct kvmppc_vcpu_e500 *vcpu_e500; 183 struct kvm_vcpu *vcpu; 184 int err; 185 186 vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); 187 if (!vcpu_e500) { 188 err = -ENOMEM; 189 goto out; 190 } 191 192 vcpu = &vcpu_e500->vcpu; 193 err = kvm_vcpu_init(vcpu, kvm, id); 194 if (err) 195 goto free_vcpu; 196 197 err = kvmppc_e500_tlb_init(vcpu_e500); 198 if (err) 199 goto uninit_vcpu; 200 201 vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO); 202 if (!vcpu->arch.shared) 203 goto uninit_tlb; 204 205 return vcpu; 206 207 uninit_tlb: 208 kvmppc_e500_tlb_uninit(vcpu_e500); 209 uninit_vcpu: 210 kvm_vcpu_uninit(vcpu); 211 free_vcpu: 212 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 213 out: 214 return ERR_PTR(err); 215 } 216 217 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) 218 { 219 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 220 221 free_page((unsigned long)vcpu->arch.shared); 222 kvm_vcpu_uninit(vcpu); 223 kvmppc_e500_tlb_uninit(vcpu_e500); 224 kmem_cache_free(kvm_vcpu_cache, vcpu_e500); 225 } 226 227 static int __init kvmppc_e500_init(void) 228 { 229 int r, i; 230 unsigned long ivor[3]; 231 unsigned long max_ivor = 0; 232 233 r = kvmppc_booke_init(); 234 if (r) 235 return r; 236 237 /* copy extra E500 exception handlers */ 238 ivor[0] = mfspr(SPRN_IVOR32); 239 ivor[1] = mfspr(SPRN_IVOR33); 240 ivor[2] = mfspr(SPRN_IVOR34); 241 for (i = 0; i < 3; i++) { 242 if (ivor[i] > max_ivor) 243 max_ivor = ivor[i]; 244 245 memcpy((void *)kvmppc_booke_handlers + ivor[i], 246 kvmppc_handlers_start + (i + 16) * kvmppc_handler_len, 247 kvmppc_handler_len); 248 } 249 flush_icache_range(kvmppc_booke_handlers, 250 kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); 251 252 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE); 253 } 254 255 static void __exit kvmppc_e500_exit(void) 256 { 257 kvmppc_booke_exit(); 258 } 259 260 module_init(kvmppc_e500_init); 261 module_exit(kvmppc_e500_exit); 262