arch/powerpc/include/asm/kvm_book3s.h

   1 /*
   2  * This program is free software; you can redistribute it and/or modify
   3  * it under the terms of the GNU General Public License, version 2, as
   4  * published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9  * GNU General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public License
  12  * along with this program; if not, write to the Free Software
  13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14  *
  15  * Copyright SUSE Linux Products GmbH 2009
  16  *
  17  * Authors: Alexander Graf <agraf@suse.de>
  18  */
  19
  20 #ifndef __ASM_KVM_BOOK3S_H__
  21 #define __ASM_KVM_BOOK3S_H__
  22
  23 #include <linux/types.h>
  24 #include <linux/kvm_host.h>
  25 #include <asm/kvm_book3s_asm.h>
  26
  27 struct kvmppc_bat {
  28         u64 raw;
  29         u32 bepi;
  30         u32 bepi_mask;
  31         u32 brpn;
  32         u8 wimg;
  33         u8 pp;
  34         bool vs         : 1;
  35         bool vp         : 1;
  36 };
  37
  38 struct kvmppc_sid_map {
  39         u64 guest_vsid;
  40         u64 guest_esid;
  41         u64 host_vsid;
  42         bool valid      : 1;
  43 };
  44
  45 #define SID_MAP_BITS    9
  46 #define SID_MAP_NUM     (1 << SID_MAP_BITS)
  47 #define SID_MAP_MASK    (SID_MAP_NUM - 1)
  48
  49 #ifdef CONFIG_PPC_BOOK3S_64
  50 #define SID_CONTEXTS    1
  51 #else
  52 #define SID_CONTEXTS    128
  53 #define VSID_POOL_SIZE  (SID_CONTEXTS * 16)
  54 #endif
  55
  56 struct hpte_cache {
  57         struct hlist_node list_pte;
  58         struct hlist_node list_pte_long;
  59         struct hlist_node list_vpte;
  60         struct hlist_node list_vpte_long;
  61 #ifdef CONFIG_PPC_BOOK3S_64
  62         struct hlist_node list_vpte_64k;
  63 #endif
  64         struct rcu_head rcu_head;
  65         u64 host_vpn;
  66         u64 pfn;
  67         ulong slot;
  68         struct kvmppc_pte pte;
  69         int pagesize;
  70 };
  71
  72 struct kvmppc_vcpu_book3s {
  73         struct kvmppc_sid_map sid_map[SID_MAP_NUM];
  74         struct {
  75                 u64 esid;
  76                 u64 vsid;
  77         } slb_shadow[64];
  78         u8 slb_shadow_max;
  79         struct kvmppc_bat ibat[8];
  80         struct kvmppc_bat dbat[8];
  81         u64 hid[6];
  82         u64 gqr[8];
  83         u64 sdr1;
  84         u64 hior;
  85         u64 msr_mask;
  86         u64 purr_offset;
  87         u64 spurr_offset;
  88 #ifdef CONFIG_PPC_BOOK3S_32
  89         u32 vsid_pool[VSID_POOL_SIZE];
  90         u32 vsid_next;
  91 #else
  92         u64 proto_vsid_first;
  93         u64 proto_vsid_max;
  94         u64 proto_vsid_next;
  95 #endif
  96         int context_id[SID_CONTEXTS];
  97
  98         bool hior_explicit;             /* HIOR is set by ioctl, not PVR */
  99
 100         struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
 101         struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
 102         struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
 103         struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG];
 104 #ifdef CONFIG_PPC_BOOK3S_64
 105         struct hlist_head hpte_hash_vpte_64k[HPTEG_HASH_NUM_VPTE_64K];
 106 #endif
 107         int hpte_cache_count;
 108         spinlock_t mmu_lock;
 109 };
 110
 111 #define CONTEXT_HOST            0
 112 #define CONTEXT_GUEST           1
 113 #define CONTEXT_GUEST_END       2
 114
 115 #define VSID_REAL       0x07ffffffffc00000ULL
 116 #define VSID_BAT        0x07ffffffffb00000ULL
 117 #define VSID_64K        0x0800000000000000ULL
 118 #define VSID_1T         0x1000000000000000ULL
 119 #define VSID_REAL_DR    0x2000000000000000ULL
 120 #define VSID_REAL_IR    0x4000000000000000ULL
 121 #define VSID_PR         0x8000000000000000ULL
 122
 123 extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
 124 extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
 125 extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
 126 extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
 127 extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
 128 extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
 129 extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
 130 extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
 131                                bool iswrite);
 132 extern void kvmppc_mmu_unmap_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
 133 extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
 134 extern void kvmppc_mmu_flush_segment(struct kvm_vcpu *vcpu, ulong eaddr, ulong seg_size);
 135 extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
 136 extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
 137                         struct kvm_vcpu *vcpu, unsigned long addr,
 138                         unsigned long status);
 139 extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
 140                         unsigned long slb_v, unsigned long valid);
 141
 142 extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 143 extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
 144 extern void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte);
 145 extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
 146 extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
 147 extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 148 extern int kvmppc_mmu_hpte_sysinit(void);
 149 extern void kvmppc_mmu_hpte_sysexit(void);
 150 extern int kvmppc_mmu_hv_init(void);
 151
 152 extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
 153 extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
 154 extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
 155 extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 156                                           unsigned int vec);
 157 extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
 158 extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
 159                            bool upper, u32 val);
 160 extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
 161 extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
 162 extern pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn, bool writing,
 163                         bool *writable);
 164 extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
 165                         unsigned long *rmap, long pte_index, int realmode);
 166 extern void kvmppc_invalidate_hpte(struct kvm *kvm, unsigned long *hptep,
 167                         unsigned long pte_index);
 168 void kvmppc_clear_ref_hpte(struct kvm *kvm, unsigned long *hptep,
 169                         unsigned long pte_index);
 170 extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
 171                         unsigned long *nb_ret);
 172 extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
 173                         unsigned long gpa, bool dirty);
 174 extern long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
 175                         long pte_index, unsigned long pteh, unsigned long ptel);
 176 extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 177                         long pte_index, unsigned long pteh, unsigned long ptel,
 178                         pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
 179 extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
 180                         unsigned long pte_index, unsigned long avpn,
 181                         unsigned long *hpret);
 182 extern long kvmppc_hv_get_dirty_log(struct kvm *kvm,
 183                         struct kvm_memory_slot *memslot, unsigned long *map);
 184 extern void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr,
 185                         unsigned long mask);
 186
 187 extern void kvmppc_entry_trampoline(void);
 188 extern void kvmppc_hv_entry_trampoline(void);
 189 extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
 190 extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
 191 extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
 192 extern void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
 193                                  struct kvm_vcpu *vcpu);
 194 extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
 195                                    struct kvmppc_book3s_shadow_vcpu *svcpu);
 196
 197 static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
 198 {
 199         return vcpu->arch.book3s;
 200 }
 201
 202 /* Also add subarch specific defines */
 203
 204 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 205 #include <asm/kvm_book3s_32.h>
 206 #endif
 207 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 208 #include <asm/kvm_book3s_64.h>
 209 #endif
 210
 211 static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
 212 {
 213         vcpu->arch.gpr[num] = val;
 214 }
 215
 216 static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
 217 {
 218         return vcpu->arch.gpr[num];
 219 }
 220
 221 static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
 222 {
 223         vcpu->arch.cr = val;
 224 }
 225
 226 static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
 227 {
 228         return vcpu->arch.cr;
 229 }
 230
 231 static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
 232 {
 233         vcpu->arch.xer = val;
 234 }
 235
 236 static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
 237 {
 238         return vcpu->arch.xer;
 239 }
 240
 241 static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
 242 {
 243         vcpu->arch.ctr = val;
 244 }
 245
 246 static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
 247 {
 248         return vcpu->arch.ctr;
 249 }
 250
 251 static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
 252 {
 253         vcpu->arch.lr = val;
 254 }
 255
 256 static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
 257 {
 258         return vcpu->arch.lr;
 259 }
 260
 261 static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
 262 {
 263         vcpu->arch.pc = val;
 264 }
 265
 266 static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
 267 {
 268         return vcpu->arch.pc;
 269 }
 270
 271 static inline u64 kvmppc_get_msr(struct kvm_vcpu *vcpu);
 272 static inline bool kvmppc_need_byteswap(struct kvm_vcpu *vcpu)
 273 {
 274         return (kvmppc_get_msr(vcpu) & MSR_LE) != (MSR_KERNEL & MSR_LE);
 275 }
 276
 277 static inline u32 kvmppc_get_last_inst_internal(struct kvm_vcpu *vcpu, ulong pc)
 278 {
 279         /* Load the instruction manually if it failed to do so in the
 280          * exit path */
 281         if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
 282                 kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
 283
 284         return kvmppc_need_byteswap(vcpu) ? swab32(vcpu->arch.last_inst) :
 285                 vcpu->arch.last_inst;
 286 }
 287
 288 static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
 289 {
 290         return kvmppc_get_last_inst_internal(vcpu, kvmppc_get_pc(vcpu));
 291 }
 292
 293 /*
 294  * Like kvmppc_get_last_inst(), but for fetching a sc instruction.
 295  * Because the sc instruction sets SRR0 to point to the following
 296  * instruction, we have to fetch from pc - 4.
 297  */
 298 static inline u32 kvmppc_get_last_sc(struct kvm_vcpu *vcpu)
 299 {
 300         return kvmppc_get_last_inst_internal(vcpu, kvmppc_get_pc(vcpu) - 4);
 301 }
 302
 303 static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
 304 {
 305         return vcpu->arch.fault_dar;
 306 }
 307
 308 static inline bool is_kvmppc_resume_guest(int r)
 309 {
 310         return (r == RESUME_GUEST || r == RESUME_GUEST_NV);
 311 }
 312
 313 /* Magic register values loaded into r3 and r4 before the 'sc' assembly
 314  * instruction for the OSI hypercalls */
 315 #define OSI_SC_MAGIC_R3                 0x113724FA
 316 #define OSI_SC_MAGIC_R4                 0x77810F9B
 317
 318 #define INS_DCBZ                        0x7c0007ec
 319 /* TO = 31 for unconditional trap */
 320 #define INS_TW                          0x7fe00008
 321
 322 /* LPIDs we support with this build -- runtime limit may be lower */
 323 #define KVMPPC_NR_LPIDS                 (LPID_RSVD + 1)
 324
 325 #endif /* __ASM_KVM_BOOK3S_H__ */