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 /*
  73  * Struct for a virtual core.
  74  * Note: entry_exit_map combines a bitmap of threads that have entered
  75  * in the bottom 8 bits and a bitmap of threads that have exited in the
  76  * next 8 bits.  This is so that we can atomically set the entry bit
  77  * iff the exit map is 0 without taking a lock.
  78  */
  79 struct kvmppc_vcore {
  80         int n_runnable;
  81         int num_threads;
  82         int entry_exit_map;
  83         int napping_threads;
  84         int first_vcpuid;
  85         u16 pcpu;
  86         u16 last_cpu;
  87         u8 vcore_state;
  88         u8 in_guest;
  89         struct kvm_vcpu *runnable_threads[MAX_SMT_THREADS];
  90         struct list_head preempt_list;
  91         spinlock_t lock;
  92         struct swait_queue_head wq;
  93         spinlock_t stoltb_lock; /* protects stolen_tb and preempt_tb */
  94         u64 stolen_tb;
  95         u64 preempt_tb;
  96         struct kvm_vcpu *runner;
  97         struct kvm *kvm;
  98         u64 tb_offset;          /* guest timebase - host timebase */
  99         ulong lpcr;
 100         u32 arch_compat;
 101         ulong pcr;
 102         ulong dpdes;            /* doorbell state (POWER8) */
 103         ulong vtb;              /* virtual timebase */
 104         ulong conferring_threads;
 105         unsigned int halt_poll_ns;
 106 };
 107
 108 struct kvmppc_vcpu_book3s {
 109         struct kvmppc_sid_map sid_map[SID_MAP_NUM];
 110         struct {
 111                 u64 esid;
 112                 u64 vsid;
 113         } slb_shadow[64];
 114         u8 slb_shadow_max;
 115         struct kvmppc_bat ibat[8];
 116         struct kvmppc_bat dbat[8];
 117         u64 hid[6];
 118         u64 gqr[8];
 119         u64 sdr1;
 120         u64 hior;
 121         u64 msr_mask;
 122         u64 vtb;
 123 #ifdef CONFIG_PPC_BOOK3S_32
 124         u32 vsid_pool[VSID_POOL_SIZE];
 125         u32 vsid_next;
 126 #else
 127         u64 proto_vsid_first;
 128         u64 proto_vsid_max;
 129         u64 proto_vsid_next;
 130 #endif
 131         int context_id[SID_CONTEXTS];
 132
 133         bool hior_explicit;             /* HIOR is set by ioctl, not PVR */
 134
 135         struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
 136         struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
 137         struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
 138         struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG];
 139 #ifdef CONFIG_PPC_BOOK3S_64
 140         struct hlist_head hpte_hash_vpte_64k[HPTEG_HASH_NUM_VPTE_64K];
 141 #endif
 142         int hpte_cache_count;
 143         spinlock_t mmu_lock;
 144 };
 145
 146 #define VSID_REAL       0x07ffffffffc00000ULL
 147 #define VSID_BAT        0x07ffffffffb00000ULL
 148 #define VSID_64K        0x0800000000000000ULL
 149 #define VSID_1T         0x1000000000000000ULL
 150 #define VSID_REAL_DR    0x2000000000000000ULL
 151 #define VSID_REAL_IR    0x4000000000000000ULL
 152 #define VSID_PR         0x8000000000000000ULL
 153
 154 extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
 155 extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
 156 extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
 157 extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
 158 extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
 159 extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
 160 extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
 161 extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
 162                                bool iswrite);
 163 extern void kvmppc_mmu_unmap_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
 164 extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
 165 extern void kvmppc_mmu_flush_segment(struct kvm_vcpu *vcpu, ulong eaddr, ulong seg_size);
 166 extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
 167 extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
 168                         struct kvm_vcpu *vcpu, unsigned long addr,
 169                         unsigned long status);
 170 extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
 171                         unsigned long slb_v, unsigned long valid);
 172 extern int kvmppc_hv_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu,
 173                         unsigned long gpa, gva_t ea, int is_store);
 174
 175 extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 176 extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
 177 extern void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte);
 178 extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
 179 extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
 180 extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 181 extern int kvmppc_mmu_hpte_sysinit(void);
 182 extern void kvmppc_mmu_hpte_sysexit(void);
 183 extern int kvmppc_mmu_hv_init(void);
 184 extern int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hc);
 185
 186 extern int kvmppc_book3s_radix_page_fault(struct kvm_run *run,
 187                         struct kvm_vcpu *vcpu,
 188                         unsigned long ea, unsigned long dsisr);
 189 extern int kvmppc_mmu_radix_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
 190                         struct kvmppc_pte *gpte, bool data, bool iswrite);
 191 extern int kvmppc_init_vm_radix(struct kvm *kvm);
 192 extern void kvmppc_free_radix(struct kvm *kvm);
 193 extern int kvmppc_radix_init(void);
 194 extern void kvmppc_radix_exit(void);
 195 extern int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
 196                         unsigned long gfn);
 197 extern int kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
 198                         unsigned long gfn);
 199 extern int kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
 200                         unsigned long gfn);
 201 extern long kvmppc_hv_get_dirty_log_radix(struct kvm *kvm,
 202                         struct kvm_memory_slot *memslot, unsigned long *map);
 203 extern int kvmhv_get_rmmu_info(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
 204
 205 /* XXX remove this export when load_last_inst() is generic */
 206 extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
 207 extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
 208 extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 209                                           unsigned int vec);
 210 extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
 211 extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
 212                            bool upper, u32 val);
 213 extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
 214 extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
 215 extern kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa,
 216                         bool writing, bool *writable);
 217 extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
 218                         unsigned long *rmap, long pte_index, int realmode);
 219 extern void kvmppc_update_dirty_map(struct kvm_memory_slot *memslot,
 220                         unsigned long gfn, unsigned long psize);
 221 extern void kvmppc_invalidate_hpte(struct kvm *kvm, __be64 *hptep,
 222                         unsigned long pte_index);
 223 void kvmppc_clear_ref_hpte(struct kvm *kvm, __be64 *hptep,
 224                         unsigned long pte_index);
 225 extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
 226                         unsigned long *nb_ret);
 227 extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
 228                         unsigned long gpa, bool dirty);
 229 extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 230                         long pte_index, unsigned long pteh, unsigned long ptel,
 231                         pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
 232 extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
 233                         unsigned long pte_index, unsigned long avpn,
 234                         unsigned long *hpret);
 235 extern long kvmppc_hv_get_dirty_log_hpt(struct kvm *kvm,
 236                         struct kvm_memory_slot *memslot, unsigned long *map);
 237 extern void kvmppc_harvest_vpa_dirty(struct kvmppc_vpa *vpa,
 238                         struct kvm_memory_slot *memslot,
 239                         unsigned long *map);
 240 extern void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr,
 241                         unsigned long mask);
 242 extern void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr);
 243
 244 extern void kvmppc_entry_trampoline(void);
 245 extern void kvmppc_hv_entry_trampoline(void);
 246 extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
 247 extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
 248 extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
 249 extern void kvmppc_pr_init_default_hcalls(struct kvm *kvm);
 250 extern int kvmppc_hcall_impl_pr(unsigned long cmd);
 251 extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd);
 252 extern void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu);
 253 extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu);
 254 extern int kvm_irq_bypass;
 255
 256 static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
 257 {
 258         return vcpu->arch.book3s;
 259 }
 260
 261 /* Also add subarch specific defines */
 262
 263 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 264 #include <asm/kvm_book3s_32.h>
 265 #endif
 266 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 267 #include <asm/kvm_book3s_64.h>
 268 #endif
 269
 270 static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
 271 {
 272         vcpu->arch.gpr[num] = val;
 273 }
 274
 275 static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
 276 {
 277         return vcpu->arch.gpr[num];
 278 }
 279
 280 static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
 281 {
 282         vcpu->arch.cr = val;
 283 }
 284
 285 static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
 286 {
 287         return vcpu->arch.cr;
 288 }
 289
 290 static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, ulong val)
 291 {
 292         vcpu->arch.xer = val;
 293 }
 294
 295 static inline ulong kvmppc_get_xer(struct kvm_vcpu *vcpu)
 296 {
 297         return vcpu->arch.xer;
 298 }
 299
 300 static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
 301 {
 302         vcpu->arch.ctr = val;
 303 }
 304
 305 static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
 306 {
 307         return vcpu->arch.ctr;
 308 }
 309
 310 static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
 311 {
 312         vcpu->arch.lr = val;
 313 }
 314
 315 static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
 316 {
 317         return vcpu->arch.lr;
 318 }
 319
 320 static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
 321 {
 322         vcpu->arch.pc = val;
 323 }
 324
 325 static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
 326 {
 327         return vcpu->arch.pc;
 328 }
 329
 330 static inline u64 kvmppc_get_msr(struct kvm_vcpu *vcpu);
 331 static inline bool kvmppc_need_byteswap(struct kvm_vcpu *vcpu)
 332 {
 333         return (kvmppc_get_msr(vcpu) & MSR_LE) != (MSR_KERNEL & MSR_LE);
 334 }
 335
 336 static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
 337 {
 338         return vcpu->arch.fault_dar;
 339 }
 340
 341 static inline bool is_kvmppc_resume_guest(int r)
 342 {
 343         return (r == RESUME_GUEST || r == RESUME_GUEST_NV);
 344 }
 345
 346 static inline bool is_kvmppc_hv_enabled(struct kvm *kvm);
 347 static inline bool kvmppc_supports_magic_page(struct kvm_vcpu *vcpu)
 348 {
 349         /* Only PR KVM supports the magic page */
 350         return !is_kvmppc_hv_enabled(vcpu->kvm);
 351 }
 352
 353 extern int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu);
 354 extern int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu);
 355
 356 /* Magic register values loaded into r3 and r4 before the 'sc' assembly
 357  * instruction for the OSI hypercalls */
 358 #define OSI_SC_MAGIC_R3                 0x113724FA
 359 #define OSI_SC_MAGIC_R4                 0x77810F9B
 360
 361 #define INS_DCBZ                        0x7c0007ec
 362 /* TO = 31 for unconditional trap */
 363 #define INS_TW                          0x7fe00008
 364
 365 /* LPIDs we support with this build -- runtime limit may be lower */
 366 #define KVMPPC_NR_LPIDS                 (LPID_RSVD + 1)
 367
 368 #define SPLIT_HACK_MASK                 0xff000000
 369 #define SPLIT_HACK_OFFS                 0xfb000000
 370
 371 #endif /* __ASM_KVM_BOOK3S_H__ */