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); 257