arch/powerpc/kvm/e500.h

   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
  26 #define E500_PID_NUM   3
  27 #define E500_TLB_NUM   2
  28
  29 /* entry is mapped somewhere in host TLB */
  30 #define E500_TLB_VALID          (1 << 0)
  31 /* TLB1 entry is mapped by host TLB1, tracked by bitmaps */
  32 #define E500_TLB_BITMAP         (1 << 1)
  33 /* TLB1 entry is mapped by host TLB0 */
  34 #define E500_TLB_TLB0           (1 << 2)
  35
  36 struct tlbe_ref {
  37         pfn_t pfn;              /* valid only for TLB0, except briefly */
  38         unsigned int flags;     /* E500_TLB_* */
  39 };
  40
  41 struct tlbe_priv {
  42         struct tlbe_ref ref;
  43 };
  44
  45 #ifdef CONFIG_KVM_E500V2
  46 struct vcpu_id_table;
  47 #endif
  48
  49 struct kvmppc_e500_tlb_params {
  50         int entries, ways, sets;
  51 };
  52
  53 struct kvmppc_vcpu_e500 {
  54         struct kvm_vcpu vcpu;
  55
  56         /* Unmodified copy of the guest's TLB -- shared with host userspace. */
  57         struct kvm_book3e_206_tlb_entry *gtlb_arch;
  58
  59         /* Starting entry number in gtlb_arch[] */
  60         int gtlb_offset[E500_TLB_NUM];
  61
  62         /* KVM internal information associated with each guest TLB entry */
  63         struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
  64
  65         struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
  66
  67         unsigned int gtlb_nv[E500_TLB_NUM];
  68
  69         unsigned int host_tlb1_nv;
  70
  71         u32 svr;
  72         u32 l1csr0;
  73         u32 l1csr1;
  74         u32 hid0;
  75         u32 hid1;
  76         u64 mcar;
  77
  78         struct page **shared_tlb_pages;
  79         int num_shared_tlb_pages;
  80
  81         u64 *g2h_tlb1_map;
  82         unsigned int *h2g_tlb1_rmap;
  83
  84         /* Minimum and maximum address mapped my TLB1 */
  85         unsigned long tlb1_min_eaddr;
  86         unsigned long tlb1_max_eaddr;
  87
  88 #ifdef CONFIG_KVM_E500V2
  89         u32 pid[E500_PID_NUM];
  90
  91         /* vcpu id table */
  92         struct vcpu_id_table *idt;
  93 #endif
  94 };
  95
  96 static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
  97 {
  98         return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
  99 }
 100
 101
 102 /* This geometry is the legacy default -- can be overridden by userspace */
 103 #define KVM_E500_TLB0_WAY_SIZE          128
 104 #define KVM_E500_TLB0_WAY_NUM           2
 105
 106 #define KVM_E500_TLB0_SIZE  (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
 107 #define KVM_E500_TLB1_SIZE  16
 108
 109 #define index_of(tlbsel, esel)  (((tlbsel) << 16) | ((esel) & 0xFFFF))
 110 #define tlbsel_of(index)        ((index) >> 16)
 111 #define esel_of(index)          ((index) & 0xFFFF)
 112
 113 #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
 114 #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
 115 #define MAS2_ATTRIB_MASK \
 116           (MAS2_X0 | MAS2_X1)
 117 #define MAS3_ATTRIB_MASK \
 118           (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
 119            | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
 120
 121 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
 122                                 ulong value);
 123 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
 124 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
 125 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea);
 126 int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea);
 127 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea);
 128 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
 129 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
 130
 131 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 132 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 133
 134
 135 #ifdef CONFIG_KVM_E500V2
 136 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
 137                                  unsigned int as, unsigned int gid,
 138                                  unsigned int pr, int avoid_recursion);
 139 #endif
 140
 141 /* TLB helper functions */
 142 static inline unsigned int
 143 get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
 144 {
 145         return (tlbe->mas1 >> 7) & 0x1f;
 146 }
 147
 148 static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
 149 {
 150         return tlbe->mas2 & MAS2_EPN;
 151 }
 152
 153 static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
 154 {
 155         unsigned int pgsize = get_tlb_size(tlbe);
 156         return 1ULL << 10 << pgsize;
 157 }
 158
 159 static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
 160 {
 161         u64 bytes = get_tlb_bytes(tlbe);
 162         return get_tlb_eaddr(tlbe) + bytes - 1;
 163 }
 164
 165 static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
 166 {
 167         return tlbe->mas7_3 & ~0xfffULL;
 168 }
 169
 170 static inline unsigned int
 171 get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
 172 {
 173         return (tlbe->mas1 >> 16) & 0xff;
 174 }
 175
 176 static inline unsigned int
 177 get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
 178 {
 179         return (tlbe->mas1 >> 12) & 0x1;
 180 }
 181
 182 static inline unsigned int
 183 get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
 184 {
 185         return (tlbe->mas1 >> 31) & 0x1;
 186 }
 187
 188 static inline unsigned int
 189 get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
 190 {
 191         return (tlbe->mas1 >> 30) & 0x1;
 192 }
 193
 194 static inline unsigned int
 195 get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe)
 196 {
 197         return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
 198 }
 199
 200 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
 201 {
 202         return vcpu->arch.pid & 0xff;
 203 }
 204
 205 static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
 206 {
 207         return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
 208 }
 209
 210 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
 211 {
 212         return !!(vcpu->arch.shared->msr & MSR_PR);
 213 }
 214
 215 static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
 216 {
 217         return (vcpu->arch.shared->mas6 >> 16) & 0xff;
 218 }
 219
 220 static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
 221 {
 222         return vcpu->arch.shared->mas6 & 0x1;
 223 }
 224
 225 static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
 226 {
 227         /*
 228          * Manual says that tlbsel has 2 bits wide.
 229          * Since we only have two TLBs, only lower bit is used.
 230          */
 231         return (vcpu->arch.shared->mas0 >> 28) & 0x1;
 232 }
 233
 234 static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
 235 {
 236         return vcpu->arch.shared->mas0 & 0xfff;
 237 }
 238
 239 static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
 240 {
 241         return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
 242 }
 243
 244 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
 245                         const struct kvm_book3e_206_tlb_entry *tlbe)
 246 {
 247         gpa_t gpa;
 248
 249         if (!get_tlb_v(tlbe))
 250                 return 0;
 251
 252 #ifndef CONFIG_KVM_BOOKE_HV
 253         /* Does it match current guest AS? */
 254         /* XXX what about IS != DS? */
 255         if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
 256                 return 0;
 257 #endif
 258
 259         gpa = get_tlb_raddr(tlbe);
 260         if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
 261                 /* Mapping is not for RAM. */
 262                 return 0;
 263
 264         return 1;
 265 }
 266
 267 static inline struct kvm_book3e_206_tlb_entry *get_entry(
 268         struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
 269 {
 270         int offset = vcpu_e500->gtlb_offset[tlbsel];
 271         return &vcpu_e500->gtlb_arch[offset + entry];
 272 }
 273
 274 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
 275                            struct kvm_book3e_206_tlb_entry *gtlbe);
 276 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500);
 277
 278 #ifdef CONFIG_KVM_BOOKE_HV
 279 #define kvmppc_e500_get_tlb_stid(vcpu, gtlbe)       get_tlb_tid(gtlbe)
 280 #define get_tlbmiss_tid(vcpu)           get_cur_pid(vcpu)
 281 #define get_tlb_sts(gtlbe)              (gtlbe->mas1 & MAS1_TS)
 282 #else
 283 unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
 284                                       struct kvm_book3e_206_tlb_entry *gtlbe);
 285
 286 static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu)
 287 {
 288         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
 289         unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf;
 290
 291         return vcpu_e500->pid[tidseld];
 292 }
 293
 294 /* Force TS=1 for all guest mappings. */
 295 #define get_tlb_sts(gtlbe)              (MAS1_TS)
 296 #endif /* !BOOKE_HV */
 297
 298 #endif /* KVM_E500_H */