1 /* 2 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved. 3 * 4 * Author: Yu Liu <yu.liu@freescale.com> 5 * Scott Wood <scottwood@freescale.com> 6 * Ashish Kalra <ashish.kalra@freescale.com> 7 * Varun Sethi <varun.sethi@freescale.com> 8 * 9 * Description: 10 * This file is based on arch/powerpc/kvm/44x_tlb.h and 11 * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>, 12 * Copyright IBM Corp. 2007-2008 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License, version 2, as 16 * published by the Free Software Foundation. 17 */ 18 19 #ifndef KVM_E500_H 20 #define KVM_E500_H 21 22 #include <linux/kvm_host.h> 23 #include <asm/mmu-book3e.h> 24 #include <asm/tlb.h> 25 #include <asm/cputhreads.h> 26 27 enum vcpu_ftr { 28 VCPU_FTR_MMU_V2 29 }; 30 31 #define E500_PID_NUM 3 32 #define E500_TLB_NUM 2 33 34 /* entry is mapped somewhere in host TLB */ 35 #define E500_TLB_VALID (1 << 31) 36 /* TLB1 entry is mapped by host TLB1, tracked by bitmaps */ 37 #define E500_TLB_BITMAP (1 << 30) 38 /* TLB1 entry is mapped by host TLB0 */ 39 #define E500_TLB_TLB0 (1 << 29) 40 /* bits [6-5] MAS2_X1 and MAS2_X0 and [4-0] bits for WIMGE */ 41 #define E500_TLB_MAS2_ATTR (0x7f) 42 43 struct tlbe_ref { 44 pfn_t pfn; /* valid only for TLB0, except briefly */ 45 unsigned int flags; /* E500_TLB_* */ 46 }; 47 48 struct tlbe_priv { 49 struct tlbe_ref ref; 50 }; 51 52 #ifdef CONFIG_KVM_E500V2 53 struct vcpu_id_table; 54 #endif 55 56 struct kvmppc_e500_tlb_params { 57 int entries, ways, sets; 58 }; 59 60 struct kvmppc_vcpu_e500 { 61 struct kvm_vcpu vcpu; 62 63 /* Unmodified copy of the guest's TLB -- shared with host userspace. */ 64 struct kvm_book3e_206_tlb_entry *gtlb_arch; 65 66 /* Starting entry number in gtlb_arch[] */ 67 int gtlb_offset[E500_TLB_NUM]; 68 69 /* KVM internal information associated with each guest TLB entry */ 70 struct tlbe_priv *gtlb_priv[E500_TLB_NUM]; 71 72 struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM]; 73 74 unsigned int gtlb_nv[E500_TLB_NUM]; 75 76 unsigned int host_tlb1_nv; 77 78 u32 svr; 79 u32 l1csr0; 80 u32 l1csr1; 81 u32 hid0; 82 u32 hid1; 83 u64 mcar; 84 85 struct page **shared_tlb_pages; 86 int num_shared_tlb_pages; 87 88 u64 *g2h_tlb1_map; 89 unsigned int *h2g_tlb1_rmap; 90 91 /* Minimum and maximum address mapped my TLB1 */ 92 unsigned long tlb1_min_eaddr; 93 unsigned long tlb1_max_eaddr; 94 95 #ifdef CONFIG_KVM_E500V2 96 u32 pid[E500_PID_NUM]; 97 98 /* vcpu id table */ 99 struct vcpu_id_table *idt; 100 #endif 101 }; 102 103 static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu) 104 { 105 return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu); 106 } 107 108 109 /* This geometry is the legacy default -- can be overridden by userspace */ 110 #define KVM_E500_TLB0_WAY_SIZE 128 111 #define KVM_E500_TLB0_WAY_NUM 2 112 113 #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM) 114 #define KVM_E500_TLB1_SIZE 16 115 116 #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF)) 117 #define tlbsel_of(index) ((index) >> 16) 118 #define esel_of(index) ((index) & 0xFFFF) 119 120 #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW) 121 #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW) 122 #define MAS2_ATTRIB_MASK \ 123 (MAS2_X0 | MAS2_X1 | MAS2_E | MAS2_G) 124 #define MAS3_ATTRIB_MASK \ 125 (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \ 126 | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK) 127 128 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, 129 ulong value); 130 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu); 131 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu); 132 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea); 133 int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea); 134 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea); 135 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500); 136 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500); 137 138 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); 139 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); 140 141 int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, 142 union kvmppc_one_reg *val); 143 int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, 144 union kvmppc_one_reg *val); 145 146 #ifdef CONFIG_KVM_E500V2 147 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500, 148 unsigned int as, unsigned int gid, 149 unsigned int pr, int avoid_recursion); 150 #endif 151 152 /* TLB helper functions */ 153 static inline unsigned int 154 get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe) 155 { 156 return (tlbe->mas1 >> 7) & 0x1f; 157 } 158 159 static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe) 160 { 161 return tlbe->mas2 & MAS2_EPN; 162 } 163 164 static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe) 165 { 166 unsigned int pgsize = get_tlb_size(tlbe); 167 return 1ULL << 10 << pgsize; 168 } 169 170 static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe) 171 { 172 u64 bytes = get_tlb_bytes(tlbe); 173 return get_tlb_eaddr(tlbe) + bytes - 1; 174 } 175 176 static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe) 177 { 178 return tlbe->mas7_3 & ~0xfffULL; 179 } 180 181 static inline unsigned int 182 get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe) 183 { 184 return (tlbe->mas1 >> 16) & 0xff; 185 } 186 187 static inline unsigned int 188 get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe) 189 { 190 return (tlbe->mas1 >> 12) & 0x1; 191 } 192 193 static inline unsigned int 194 get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe) 195 { 196 return (tlbe->mas1 >> 31) & 0x1; 197 } 198 199 static inline unsigned int 200 get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe) 201 { 202 return (tlbe->mas1 >> 30) & 0x1; 203 } 204 205 static inline unsigned int 206 get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe) 207 { 208 return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; 209 } 210 211 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) 212 { 213 return vcpu->arch.pid & 0xff; 214 } 215 216 static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu) 217 { 218 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS)); 219 } 220 221 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu) 222 { 223 return !!(vcpu->arch.shared->msr & MSR_PR); 224 } 225 226 static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu) 227 { 228 return (vcpu->arch.shared->mas6 >> 16) & 0xff; 229 } 230 231 static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu) 232 { 233 return vcpu->arch.shared->mas6 & 0x1; 234 } 235 236 static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu) 237 { 238 /* 239 * Manual says that tlbsel has 2 bits wide. 240 * Since we only have two TLBs, only lower bit is used. 241 */ 242 return (vcpu->arch.shared->mas0 >> 28) & 0x1; 243 } 244 245 static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu) 246 { 247 return vcpu->arch.shared->mas0 & 0xfff; 248 } 249 250 static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu) 251 { 252 return (vcpu->arch.shared->mas0 >> 16) & 0xfff; 253 } 254 255 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu, 256 const struct kvm_book3e_206_tlb_entry *tlbe) 257 { 258 gpa_t gpa; 259 260 if (!get_tlb_v(tlbe)) 261 return 0; 262 263 #ifndef CONFIG_KVM_BOOKE_HV 264 /* Does it match current guest AS? */ 265 /* XXX what about IS != DS? */ 266 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS)) 267 return 0; 268 #endif 269 270 gpa = get_tlb_raddr(tlbe); 271 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT)) 272 /* Mapping is not for RAM. */ 273 return 0; 274 275 return 1; 276 } 277 278 static inline struct kvm_book3e_206_tlb_entry *get_entry( 279 struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry) 280 { 281 int offset = vcpu_e500->gtlb_offset[tlbsel]; 282 return &vcpu_e500->gtlb_arch[offset + entry]; 283 } 284 285 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500, 286 struct kvm_book3e_206_tlb_entry *gtlbe); 287 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500); 288 289 #ifdef CONFIG_KVM_BOOKE_HV 290 #define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe) 291 #define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu) 292 #define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS) 293 294 /* 295 * These functions should be called with preemption disabled 296 * and the returned value is valid only in that context 297 */ 298 static inline int get_thread_specific_lpid(int vm_lpid) 299 { 300 int vcpu_lpid = vm_lpid; 301 302 if (threads_per_core == 2) 303 vcpu_lpid |= smp_processor_id() & 1; 304 305 return vcpu_lpid; 306 } 307 308 static inline int get_lpid(struct kvm_vcpu *vcpu) 309 { 310 return get_thread_specific_lpid(vcpu->kvm->arch.lpid); 311 } 312 #else 313 unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu, 314 struct kvm_book3e_206_tlb_entry *gtlbe); 315 316 static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu) 317 { 318 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 319 unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf; 320 321 return vcpu_e500->pid[tidseld]; 322 } 323 324 /* Force TS=1 for all guest mappings. */ 325 #define get_tlb_sts(gtlbe) (MAS1_TS) 326 #endif /* !BOOKE_HV */ 327 328 static inline bool has_feature(const struct kvm_vcpu *vcpu, 329 enum vcpu_ftr ftr) 330 { 331 bool has_ftr; 332 switch (ftr) { 333 case VCPU_FTR_MMU_V2: 334 has_ftr = ((vcpu->arch.mmucfg & MMUCFG_MAVN) == MMUCFG_MAVN_V2); 335 break; 336 default: 337 return false; 338 } 339 return has_ftr; 340 } 341 342 #endif /* KVM_E500_H */ 343