1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved. 4 * 5 * Author: Yu Liu <yu.liu@freescale.com> 6 * Scott Wood <scottwood@freescale.com> 7 * Ashish Kalra <ashish.kalra@freescale.com> 8 * Varun Sethi <varun.sethi@freescale.com> 9 * 10 * Description: 11 * This file is based on arch/powerpc/kvm/44x_tlb.h and 12 * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>, 13 * Copyright IBM Corp. 2007-2008 14 */ 15 16 #ifndef KVM_E500_H 17 #define KVM_E500_H 18 19 #include <linux/kvm_host.h> 20 #include <asm/nohash/mmu-book3e.h> 21 #include <asm/tlb.h> 22 #include <asm/cputhreads.h> 23 24 enum vcpu_ftr { 25 VCPU_FTR_MMU_V2 26 }; 27 28 #define E500_PID_NUM 3 29 #define E500_TLB_NUM 2 30 31 /* entry is mapped somewhere in host TLB */ 32 #define E500_TLB_VALID (1 << 31) 33 /* TLB1 entry is mapped by host TLB1, tracked by bitmaps */ 34 #define E500_TLB_BITMAP (1 << 30) 35 /* TLB1 entry is mapped by host TLB0 */ 36 #define E500_TLB_TLB0 (1 << 29) 37 /* bits [6-5] MAS2_X1 and MAS2_X0 and [4-0] bits for WIMGE */ 38 #define E500_TLB_MAS2_ATTR (0x7f) 39 40 struct tlbe_ref { 41 kvm_pfn_t pfn; /* valid only for TLB0, except briefly */ 42 unsigned int flags; /* E500_TLB_* */ 43 }; 44 45 struct tlbe_priv { 46 struct tlbe_ref ref; 47 }; 48 49 #ifdef CONFIG_KVM_E500V2 50 struct vcpu_id_table; 51 #endif 52 53 struct kvmppc_e500_tlb_params { 54 int entries, ways, sets; 55 }; 56 57 struct kvmppc_vcpu_e500 { 58 struct kvm_vcpu vcpu; 59 60 /* Unmodified copy of the guest's TLB -- shared with host userspace. */ 61 struct kvm_book3e_206_tlb_entry *gtlb_arch; 62 63 /* Starting entry number in gtlb_arch[] */ 64 int gtlb_offset[E500_TLB_NUM]; 65 66 /* KVM internal information associated with each guest TLB entry */ 67 struct tlbe_priv *gtlb_priv[E500_TLB_NUM]; 68 69 struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM]; 70 71 unsigned int gtlb_nv[E500_TLB_NUM]; 72 73 unsigned int host_tlb1_nv; 74 75 u32 svr; 76 u32 l1csr0; 77 u32 l1csr1; 78 u32 hid0; 79 u32 hid1; 80 u64 mcar; 81 82 struct page **shared_tlb_pages; 83 int num_shared_tlb_pages; 84 85 u64 *g2h_tlb1_map; 86 unsigned int *h2g_tlb1_rmap; 87 88 /* Minimum and maximum address mapped my TLB1 */ 89 unsigned long tlb1_min_eaddr; 90 unsigned long tlb1_max_eaddr; 91 92 #ifdef CONFIG_KVM_E500V2 93 u32 pid[E500_PID_NUM]; 94 95 /* vcpu id table */ 96 struct vcpu_id_table *idt; 97 #endif 98 }; 99 100 static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu) 101 { 102 return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu); 103 } 104 105 106 /* This geometry is the legacy default -- can be overridden by userspace */ 107 #define KVM_E500_TLB0_WAY_SIZE 128 108 #define KVM_E500_TLB0_WAY_NUM 2 109 110 #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM) 111 #define KVM_E500_TLB1_SIZE 16 112 113 #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF)) 114 #define tlbsel_of(index) ((index) >> 16) 115 #define esel_of(index) ((index) & 0xFFFF) 116 117 #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW) 118 #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW) 119 #define MAS2_ATTRIB_MASK \ 120 (MAS2_X0 | MAS2_X1 | MAS2_E | MAS2_G) 121 #define MAS3_ATTRIB_MASK \ 122 (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \ 123 | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK) 124 125 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, 126 ulong value); 127 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu); 128 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu); 129 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea); 130 int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea); 131 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea); 132 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500); 133 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500); 134 135 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); 136 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); 137 138 int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, 139 union kvmppc_one_reg *val); 140 int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, 141 union kvmppc_one_reg *val); 142 143 #ifdef CONFIG_KVM_E500V2 144 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500, 145 unsigned int as, unsigned int gid, 146 unsigned int pr, int avoid_recursion); 147 #endif 148 149 /* TLB helper functions */ 150 static inline unsigned int 151 get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe) 152 { 153 return (tlbe->mas1 >> 7) & 0x1f; 154 } 155 156 static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe) 157 { 158 return tlbe->mas2 & MAS2_EPN; 159 } 160 161 static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe) 162 { 163 unsigned int pgsize = get_tlb_size(tlbe); 164 return 1ULL << 10 << pgsize; 165 } 166 167 static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe) 168 { 169 u64 bytes = get_tlb_bytes(tlbe); 170 return get_tlb_eaddr(tlbe) + bytes - 1; 171 } 172 173 static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe) 174 { 175 return tlbe->mas7_3 & ~0xfffULL; 176 } 177 178 static inline unsigned int 179 get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe) 180 { 181 return (tlbe->mas1 >> 16) & 0xff; 182 } 183 184 static inline unsigned int 185 get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe) 186 { 187 return (tlbe->mas1 >> 12) & 0x1; 188 } 189 190 static inline unsigned int 191 get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe) 192 { 193 return (tlbe->mas1 >> 31) & 0x1; 194 } 195 196 static inline unsigned int 197 get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe) 198 { 199 return (tlbe->mas1 >> 30) & 0x1; 200 } 201 202 static inline unsigned int 203 get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe) 204 { 205 return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; 206 } 207 208 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) 209 { 210 return vcpu->arch.pid & 0xff; 211 } 212 213 static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu) 214 { 215 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS)); 216 } 217 218 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu) 219 { 220 return !!(vcpu->arch.shared->msr & MSR_PR); 221 } 222 223 static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu) 224 { 225 return (vcpu->arch.shared->mas6 >> 16) & 0xff; 226 } 227 228 static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu) 229 { 230 return vcpu->arch.shared->mas6 & 0x1; 231 } 232 233 static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu) 234 { 235 /* 236 * Manual says that tlbsel has 2 bits wide. 237 * Since we only have two TLBs, only lower bit is used. 238 */ 239 return (vcpu->arch.shared->mas0 >> 28) & 0x1; 240 } 241 242 static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu) 243 { 244 return vcpu->arch.shared->mas0 & 0xfff; 245 } 246 247 static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu) 248 { 249 return (vcpu->arch.shared->mas0 >> 16) & 0xfff; 250 } 251 252 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu, 253 const struct kvm_book3e_206_tlb_entry *tlbe) 254 { 255 gpa_t gpa; 256 257 if (!get_tlb_v(tlbe)) 258 return 0; 259 260 #ifndef CONFIG_KVM_BOOKE_HV 261 /* Does it match current guest AS? */ 262 /* XXX what about IS != DS? */ 263 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS)) 264 return 0; 265 #endif 266 267 gpa = get_tlb_raddr(tlbe); 268 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT)) 269 /* Mapping is not for RAM. */ 270 return 0; 271 272 return 1; 273 } 274 275 static inline struct kvm_book3e_206_tlb_entry *get_entry( 276 struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry) 277 { 278 int offset = vcpu_e500->gtlb_offset[tlbsel]; 279 return &vcpu_e500->gtlb_arch[offset + entry]; 280 } 281 282 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500, 283 struct kvm_book3e_206_tlb_entry *gtlbe); 284 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500); 285 286 #ifdef CONFIG_KVM_BOOKE_HV 287 #define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe) 288 #define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu) 289 #define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS) 290 291 /* 292 * These functions should be called with preemption disabled 293 * and the returned value is valid only in that context 294 */ 295 static inline int get_thread_specific_lpid(int vm_lpid) 296 { 297 int vcpu_lpid = vm_lpid; 298 299 if (threads_per_core == 2) 300 vcpu_lpid |= smp_processor_id() & 1; 301 302 return vcpu_lpid; 303 } 304 305 static inline int get_lpid(struct kvm_vcpu *vcpu) 306 { 307 return get_thread_specific_lpid(vcpu->kvm->arch.lpid); 308 } 309 #else 310 unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu, 311 struct kvm_book3e_206_tlb_entry *gtlbe); 312 313 static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu) 314 { 315 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); 316 unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf; 317 318 return vcpu_e500->pid[tidseld]; 319 } 320 321 /* Force TS=1 for all guest mappings. */ 322 #define get_tlb_sts(gtlbe) (MAS1_TS) 323 #endif /* !BOOKE_HV */ 324 325 static inline bool has_feature(const struct kvm_vcpu *vcpu, 326 enum vcpu_ftr ftr) 327 { 328 bool has_ftr; 329 switch (ftr) { 330 case VCPU_FTR_MMU_V2: 331 has_ftr = ((vcpu->arch.mmucfg & MMUCFG_MAVN) == MMUCFG_MAVN_V2); 332 break; 333 default: 334 return false; 335 } 336 return has_ftr; 337 } 338 339 #endif /* KVM_E500_H */ 340