arch/powerpc/include/asm/kvm_host.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 IBM Corp. 2007
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  */
  19
  20 #ifndef __POWERPC_KVM_HOST_H__
  21 #define __POWERPC_KVM_HOST_H__
  22
  23 #include <linux/mutex.h>
  24 #include <linux/hrtimer.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/types.h>
  27 #include <linux/kvm_types.h>
  28 #include <linux/threads.h>
  29 #include <linux/spinlock.h>
  30 #include <linux/kvm_para.h>
  31 #include <linux/list.h>
  32 #include <linux/atomic.h>
  33 #include <asm/kvm_asm.h>
  34 #include <asm/processor.h>
  35 #include <asm/page.h>
  36
  37 #define KVM_MAX_VCPUS           NR_CPUS
  38 #define KVM_MAX_VCORES          NR_CPUS
  39 #define KVM_MEMORY_SLOTS 32
  40 /* memory slots that does not exposed to userspace */
  41 #define KVM_PRIVATE_MEM_SLOTS 4
  42 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
  43
  44 #ifdef CONFIG_KVM_MMIO
  45 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
  46 #endif
  47
  48 #ifdef CONFIG_KVM_BOOK3S_64_HV
  49 #include <linux/mmu_notifier.h>
  50
  51 #define KVM_ARCH_WANT_MMU_NOTIFIER
  52
  53 struct kvm;
  54 extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
  55 extern int kvm_age_hva(struct kvm *kvm, unsigned long hva);
  56 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
  57 extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
  58
  59 #endif
  60
  61 /* We don't currently support large pages. */
  62 #define KVM_HPAGE_GFN_SHIFT(x)  0
  63 #define KVM_NR_PAGE_SIZES       1
  64 #define KVM_PAGES_PER_HPAGE(x)  (1UL<<31)
  65
  66 #define HPTEG_CACHE_NUM                 (1 << 15)
  67 #define HPTEG_HASH_BITS_PTE             13
  68 #define HPTEG_HASH_BITS_PTE_LONG        12
  69 #define HPTEG_HASH_BITS_VPTE            13
  70 #define HPTEG_HASH_BITS_VPTE_LONG       5
  71 #define HPTEG_HASH_NUM_PTE              (1 << HPTEG_HASH_BITS_PTE)
  72 #define HPTEG_HASH_NUM_PTE_LONG         (1 << HPTEG_HASH_BITS_PTE_LONG)
  73 #define HPTEG_HASH_NUM_VPTE             (1 << HPTEG_HASH_BITS_VPTE)
  74 #define HPTEG_HASH_NUM_VPTE_LONG        (1 << HPTEG_HASH_BITS_VPTE_LONG)
  75
  76 /* Physical Address Mask - allowed range of real mode RAM access */
  77 #define KVM_PAM                 0x0fffffffffffffffULL
  78
  79 struct kvm;
  80 struct kvm_run;
  81 struct kvm_vcpu;
  82
  83 struct lppaca;
  84 struct slb_shadow;
  85 struct dtl;
  86
  87 struct kvm_vm_stat {
  88         u32 remote_tlb_flush;
  89 };
  90
  91 struct kvm_vcpu_stat {
  92         u32 sum_exits;
  93         u32 mmio_exits;
  94         u32 dcr_exits;
  95         u32 signal_exits;
  96         u32 light_exits;
  97         /* Account for special types of light exits: */
  98         u32 itlb_real_miss_exits;
  99         u32 itlb_virt_miss_exits;
 100         u32 dtlb_real_miss_exits;
 101         u32 dtlb_virt_miss_exits;
 102         u32 syscall_exits;
 103         u32 isi_exits;
 104         u32 dsi_exits;
 105         u32 emulated_inst_exits;
 106         u32 dec_exits;
 107         u32 ext_intr_exits;
 108         u32 halt_wakeup;
 109 #ifdef CONFIG_PPC_BOOK3S
 110         u32 pf_storage;
 111         u32 pf_instruc;
 112         u32 sp_storage;
 113         u32 sp_instruc;
 114         u32 queue_intr;
 115         u32 ld;
 116         u32 ld_slow;
 117         u32 st;
 118         u32 st_slow;
 119 #endif
 120 };
 121
 122 enum kvm_exit_types {
 123         MMIO_EXITS,
 124         DCR_EXITS,
 125         SIGNAL_EXITS,
 126         ITLB_REAL_MISS_EXITS,
 127         ITLB_VIRT_MISS_EXITS,
 128         DTLB_REAL_MISS_EXITS,
 129         DTLB_VIRT_MISS_EXITS,
 130         SYSCALL_EXITS,
 131         ISI_EXITS,
 132         DSI_EXITS,
 133         EMULATED_INST_EXITS,
 134         EMULATED_MTMSRWE_EXITS,
 135         EMULATED_WRTEE_EXITS,
 136         EMULATED_MTSPR_EXITS,
 137         EMULATED_MFSPR_EXITS,
 138         EMULATED_MTMSR_EXITS,
 139         EMULATED_MFMSR_EXITS,
 140         EMULATED_TLBSX_EXITS,
 141         EMULATED_TLBWE_EXITS,
 142         EMULATED_RFI_EXITS,
 143         DEC_EXITS,
 144         EXT_INTR_EXITS,
 145         HALT_WAKEUP,
 146         USR_PR_INST,
 147         FP_UNAVAIL,
 148         DEBUG_EXITS,
 149         TIMEINGUEST,
 150         __NUMBER_OF_KVM_EXIT_TYPES
 151 };
 152
 153 /* allow access to big endian 32bit upper/lower parts and 64bit var */
 154 struct kvmppc_exit_timing {
 155         union {
 156                 u64 tv64;
 157                 struct {
 158                         u32 tbu, tbl;
 159                 } tv32;
 160         };
 161 };
 162
 163 struct kvmppc_pginfo {
 164         unsigned long pfn;
 165         atomic_t refcnt;
 166 };
 167
 168 struct kvmppc_spapr_tce_table {
 169         struct list_head list;
 170         struct kvm *kvm;
 171         u64 liobn;
 172         u32 window_size;
 173         struct page *pages[0];
 174 };
 175
 176 struct kvmppc_linear_info {
 177         void            *base_virt;
 178         unsigned long    base_pfn;
 179         unsigned long    npages;
 180         struct list_head list;
 181         atomic_t         use_count;
 182         int              type;
 183 };
 184
 185 /*
 186  * The reverse mapping array has one entry for each HPTE,
 187  * which stores the guest's view of the second word of the HPTE
 188  * (including the guest physical address of the mapping),
 189  * plus forward and backward pointers in a doubly-linked ring
 190  * of HPTEs that map the same host page.  The pointers in this
 191  * ring are 32-bit HPTE indexes, to save space.
 192  */
 193 struct revmap_entry {
 194         unsigned long guest_rpte;
 195         unsigned int forw, back;
 196 };
 197
 198 /*
 199  * We use the top bit of each memslot->rmap entry as a lock bit,
 200  * and bit 32 as a present flag.  The bottom 32 bits are the
 201  * index in the guest HPT of a HPTE that points to the page.
 202  */
 203 #define KVMPPC_RMAP_LOCK_BIT    63
 204 #define KVMPPC_RMAP_RC_SHIFT    32
 205 #define KVMPPC_RMAP_REFERENCED  (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT)
 206 #define KVMPPC_RMAP_CHANGED     (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT)
 207 #define KVMPPC_RMAP_PRESENT     0x100000000ul
 208 #define KVMPPC_RMAP_INDEX       0xfffffffful
 209
 210 /* Low-order bits in kvm->arch.slot_phys[][] */
 211 #define KVMPPC_PAGE_ORDER_MASK  0x1f
 212 #define KVMPPC_PAGE_NO_CACHE    HPTE_R_I        /* 0x20 */
 213 #define KVMPPC_PAGE_WRITETHRU   HPTE_R_W        /* 0x40 */
 214 #define KVMPPC_GOT_PAGE         0x80
 215
 216 struct kvm_arch_memory_slot {
 217 };
 218
 219 struct kvm_arch {
 220 #ifdef CONFIG_KVM_BOOK3S_64_HV
 221         unsigned long hpt_virt;
 222         struct revmap_entry *revmap;
 223         unsigned int lpid;
 224         unsigned int host_lpid;
 225         unsigned long host_lpcr;
 226         unsigned long sdr1;
 227         unsigned long host_sdr1;
 228         int tlbie_lock;
 229         unsigned long lpcr;
 230         unsigned long rmor;
 231         struct kvmppc_linear_info *rma;
 232         unsigned long vrma_slb_v;
 233         int rma_setup_done;
 234         int using_mmu_notifiers;
 235         struct list_head spapr_tce_tables;
 236         spinlock_t slot_phys_lock;
 237         unsigned long *slot_phys[KVM_MEM_SLOTS_NUM];
 238         int slot_npages[KVM_MEM_SLOTS_NUM];
 239         unsigned short last_vcpu[NR_CPUS];
 240         struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
 241         struct kvmppc_linear_info *hpt_li;
 242 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 243 };
 244
 245 /*
 246  * Struct for a virtual core.
 247  * Note: entry_exit_count combines an entry count in the bottom 8 bits
 248  * and an exit count in the next 8 bits.  This is so that we can
 249  * atomically increment the entry count iff the exit count is 0
 250  * without taking the lock.
 251  */
 252 struct kvmppc_vcore {
 253         int n_runnable;
 254         int n_busy;
 255         int num_threads;
 256         int entry_exit_count;
 257         int n_woken;
 258         int nap_count;
 259         int napping_threads;
 260         u16 pcpu;
 261         u8 vcore_state;
 262         u8 in_guest;
 263         struct list_head runnable_threads;
 264         spinlock_t lock;
 265         wait_queue_head_t wq;
 266 };
 267
 268 #define VCORE_ENTRY_COUNT(vc)   ((vc)->entry_exit_count & 0xff)
 269 #define VCORE_EXIT_COUNT(vc)    ((vc)->entry_exit_count >> 8)
 270
 271 /* Values for vcore_state */
 272 #define VCORE_INACTIVE  0
 273 #define VCORE_RUNNING   1
 274 #define VCORE_EXITING   2
 275 #define VCORE_SLEEPING  3
 276
 277 struct kvmppc_pte {
 278         ulong eaddr;
 279         u64 vpage;
 280         ulong raddr;
 281         bool may_read           : 1;
 282         bool may_write          : 1;
 283         bool may_execute        : 1;
 284 };
 285
 286 struct kvmppc_mmu {
 287         /* book3s_64 only */
 288         void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
 289         u64  (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
 290         u64  (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
 291         void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
 292         void (*slbia)(struct kvm_vcpu *vcpu);
 293         /* book3s */
 294         void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
 295         u32  (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
 296         int  (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data);
 297         void (*reset_msr)(struct kvm_vcpu *vcpu);
 298         void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
 299         int  (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
 300         u64  (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
 301         bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
 302 };
 303
 304 struct kvmppc_slb {
 305         u64 esid;
 306         u64 vsid;
 307         u64 orige;
 308         u64 origv;
 309         bool valid      : 1;
 310         bool Ks         : 1;
 311         bool Kp         : 1;
 312         bool nx         : 1;
 313         bool large      : 1;    /* PTEs are 16MB */
 314         bool tb         : 1;    /* 1TB segment */
 315         bool class      : 1;
 316 };
 317
 318 struct kvm_vcpu_arch {
 319         ulong host_stack;
 320         u32 host_pid;
 321 #ifdef CONFIG_PPC_BOOK3S
 322         struct kvmppc_slb slb[64];
 323         int slb_max;            /* 1 + index of last valid entry in slb[] */
 324         int slb_nr;             /* total number of entries in SLB */
 325         struct kvmppc_mmu mmu;
 326 #endif
 327
 328         ulong gpr[32];
 329
 330         u64 fpr[32];
 331         u64 fpscr;
 332
 333 #ifdef CONFIG_SPE
 334         ulong evr[32];
 335         ulong spefscr;
 336         ulong host_spefscr;
 337         u64 acc;
 338 #endif
 339 #ifdef CONFIG_ALTIVEC
 340         vector128 vr[32];
 341         vector128 vscr;
 342 #endif
 343
 344 #ifdef CONFIG_VSX
 345         u64 vsr[64];
 346 #endif
 347
 348 #ifdef CONFIG_PPC_BOOK3S
 349         /* For Gekko paired singles */
 350         u32 qpr[32];
 351 #endif
 352
 353         ulong pc;
 354         ulong ctr;
 355         ulong lr;
 356
 357         ulong xer;
 358         u32 cr;
 359
 360 #ifdef CONFIG_PPC_BOOK3S
 361         ulong hflags;
 362         ulong guest_owned_ext;
 363         ulong purr;
 364         ulong spurr;
 365         ulong dscr;
 366         ulong amr;
 367         ulong uamor;
 368         u32 ctrl;
 369         ulong dabr;
 370 #endif
 371         u32 vrsave; /* also USPRG0 */
 372         u32 mmucr;
 373         ulong shadow_msr;
 374         ulong csrr0;
 375         ulong csrr1;
 376         ulong dsrr0;
 377         ulong dsrr1;
 378         ulong mcsrr0;
 379         ulong mcsrr1;
 380         ulong mcsr;
 381         u32 dec;
 382         u32 decar;
 383         u32 tbl;
 384         u32 tbu;
 385         u32 tcr;
 386         ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
 387         u32 ivor[64];
 388         ulong ivpr;
 389         u32 pvr;
 390
 391         u32 shadow_pid;
 392         u32 shadow_pid1;
 393         u32 pid;
 394         u32 swap_pid;
 395
 396         u32 ccr0;
 397         u32 ccr1;
 398         u32 dbcr0;
 399         u32 dbcr1;
 400         u32 dbsr;
 401
 402         u64 mmcr[3];
 403         u32 pmc[8];
 404
 405 #ifdef CONFIG_KVM_EXIT_TIMING
 406         struct mutex exit_timing_lock;
 407         struct kvmppc_exit_timing timing_exit;
 408         struct kvmppc_exit_timing timing_last_enter;
 409         u32 last_exit_type;
 410         u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
 411         u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 412         u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 413         u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 414         u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 415         u64 timing_last_exit;
 416         struct dentry *debugfs_exit_timing;
 417 #endif
 418
 419 #ifdef CONFIG_PPC_BOOK3S
 420         ulong fault_dar;
 421         u32 fault_dsisr;
 422 #endif
 423
 424 #ifdef CONFIG_BOOKE
 425         ulong fault_dear;
 426         ulong fault_esr;
 427         ulong queued_dear;
 428         ulong queued_esr;
 429         u32 tlbcfg[4];
 430         u32 mmucfg;
 431 #endif
 432         gpa_t paddr_accessed;
 433
 434         u8 io_gpr; /* GPR used as IO source/target */
 435         u8 mmio_is_bigendian;
 436         u8 mmio_sign_extend;
 437         u8 dcr_needed;
 438         u8 dcr_is_write;
 439         u8 osi_needed;
 440         u8 osi_enabled;
 441         u8 papr_enabled;
 442         u8 sane;
 443         u8 cpu_type;
 444         u8 hcall_needed;
 445
 446         u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
 447
 448         struct hrtimer dec_timer;
 449         struct tasklet_struct tasklet;
 450         u64 dec_jiffies;
 451         u64 dec_expires;
 452         unsigned long pending_exceptions;
 453         u16 last_cpu;
 454         u8 ceded;
 455         u8 prodded;
 456         u32 last_inst;
 457
 458         struct lppaca *vpa;
 459         struct slb_shadow *slb_shadow;
 460         struct dtl *dtl;
 461         struct dtl *dtl_end;
 462
 463         wait_queue_head_t *wqp;
 464         struct kvmppc_vcore *vcore;
 465         int ret;
 466         int trap;
 467         int state;
 468         int ptid;
 469         bool timer_running;
 470         wait_queue_head_t cpu_run;
 471
 472         struct kvm_vcpu_arch_shared *shared;
 473         unsigned long magic_page_pa; /* phys addr to map the magic page to */
 474         unsigned long magic_page_ea; /* effect. addr to map the magic page to */
 475
 476 #ifdef CONFIG_KVM_BOOK3S_64_HV
 477         struct kvm_vcpu_arch_shared shregs;
 478
 479         unsigned long pgfault_addr;
 480         long pgfault_index;
 481         unsigned long pgfault_hpte[2];
 482
 483         struct list_head run_list;
 484         struct task_struct *run_task;
 485         struct kvm_run *kvm_run;
 486         pgd_t *pgdir;
 487 #endif
 488 };
 489
 490 /* Values for vcpu->arch.state */
 491 #define KVMPPC_VCPU_STOPPED             0
 492 #define KVMPPC_VCPU_BUSY_IN_HOST        1
 493 #define KVMPPC_VCPU_RUNNABLE            2
 494
 495 /* Values for vcpu->arch.io_gpr */
 496 #define KVM_MMIO_REG_MASK       0x001f
 497 #define KVM_MMIO_REG_EXT_MASK   0xffe0
 498 #define KVM_MMIO_REG_GPR        0x0000
 499 #define KVM_MMIO_REG_FPR        0x0020
 500 #define KVM_MMIO_REG_QPR        0x0040
 501 #define KVM_MMIO_REG_FQPR       0x0060
 502
 503 #define __KVM_HAVE_ARCH_WQP
 504
 505 #endif /* __POWERPC_KVM_HOST_H__ */