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 #include <asm/cacheflush.h>
  37
  38 #define KVM_MAX_VCPUS           NR_CPUS
  39 #define KVM_MAX_VCORES          NR_CPUS
  40 #define KVM_MEMORY_SLOTS 32
  41 /* memory slots that does not exposed to userspace */
  42 #define KVM_PRIVATE_MEM_SLOTS 4
  43 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
  44
  45 #ifdef CONFIG_KVM_MMIO
  46 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
  47 #endif
  48
  49 #if !defined(CONFIG_KVM_440)
  50 #include <linux/mmu_notifier.h>
  51
  52 #define KVM_ARCH_WANT_MMU_NOTIFIER
  53
  54 struct kvm;
  55 extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
  56 extern int kvm_unmap_hva_range(struct kvm *kvm,
  57                                unsigned long start, unsigned long end);
  58 extern int kvm_age_hva(struct kvm *kvm, unsigned long hva);
  59 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
  60 extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
  61
  62 #endif
  63
  64 /* We don't currently support large pages. */
  65 #define KVM_HPAGE_GFN_SHIFT(x)  0
  66 #define KVM_NR_PAGE_SIZES       1
  67 #define KVM_PAGES_PER_HPAGE(x)  (1UL<<31)
  68
  69 #define HPTEG_CACHE_NUM                 (1 << 15)
  70 #define HPTEG_HASH_BITS_PTE             13
  71 #define HPTEG_HASH_BITS_PTE_LONG        12
  72 #define HPTEG_HASH_BITS_VPTE            13
  73 #define HPTEG_HASH_BITS_VPTE_LONG       5
  74 #define HPTEG_HASH_NUM_PTE              (1 << HPTEG_HASH_BITS_PTE)
  75 #define HPTEG_HASH_NUM_PTE_LONG         (1 << HPTEG_HASH_BITS_PTE_LONG)
  76 #define HPTEG_HASH_NUM_VPTE             (1 << HPTEG_HASH_BITS_VPTE)
  77 #define HPTEG_HASH_NUM_VPTE_LONG        (1 << HPTEG_HASH_BITS_VPTE_LONG)
  78
  79 /* Physical Address Mask - allowed range of real mode RAM access */
  80 #define KVM_PAM                 0x0fffffffffffffffULL
  81
  82 struct kvm;
  83 struct kvm_run;
  84 struct kvm_vcpu;
  85
  86 struct lppaca;
  87 struct slb_shadow;
  88 struct dtl_entry;
  89
  90 struct kvm_vm_stat {
  91         u32 remote_tlb_flush;
  92 };
  93
  94 struct kvm_vcpu_stat {
  95         u32 sum_exits;
  96         u32 mmio_exits;
  97         u32 dcr_exits;
  98         u32 signal_exits;
  99         u32 light_exits;
 100         /* Account for special types of light exits: */
 101         u32 itlb_real_miss_exits;
 102         u32 itlb_virt_miss_exits;
 103         u32 dtlb_real_miss_exits;
 104         u32 dtlb_virt_miss_exits;
 105         u32 syscall_exits;
 106         u32 isi_exits;
 107         u32 dsi_exits;
 108         u32 emulated_inst_exits;
 109         u32 dec_exits;
 110         u32 ext_intr_exits;
 111         u32 halt_wakeup;
 112         u32 dbell_exits;
 113         u32 gdbell_exits;
 114 #ifdef CONFIG_PPC_BOOK3S
 115         u32 pf_storage;
 116         u32 pf_instruc;
 117         u32 sp_storage;
 118         u32 sp_instruc;
 119         u32 queue_intr;
 120         u32 ld;
 121         u32 ld_slow;
 122         u32 st;
 123         u32 st_slow;
 124 #endif
 125 };
 126
 127 enum kvm_exit_types {
 128         MMIO_EXITS,
 129         DCR_EXITS,
 130         SIGNAL_EXITS,
 131         ITLB_REAL_MISS_EXITS,
 132         ITLB_VIRT_MISS_EXITS,
 133         DTLB_REAL_MISS_EXITS,
 134         DTLB_VIRT_MISS_EXITS,
 135         SYSCALL_EXITS,
 136         ISI_EXITS,
 137         DSI_EXITS,
 138         EMULATED_INST_EXITS,
 139         EMULATED_MTMSRWE_EXITS,
 140         EMULATED_WRTEE_EXITS,
 141         EMULATED_MTSPR_EXITS,
 142         EMULATED_MFSPR_EXITS,
 143         EMULATED_MTMSR_EXITS,
 144         EMULATED_MFMSR_EXITS,
 145         EMULATED_TLBSX_EXITS,
 146         EMULATED_TLBWE_EXITS,
 147         EMULATED_RFI_EXITS,
 148         EMULATED_RFCI_EXITS,
 149         DEC_EXITS,
 150         EXT_INTR_EXITS,
 151         HALT_WAKEUP,
 152         USR_PR_INST,
 153         FP_UNAVAIL,
 154         DEBUG_EXITS,
 155         TIMEINGUEST,
 156         DBELL_EXITS,
 157         GDBELL_EXITS,
 158         __NUMBER_OF_KVM_EXIT_TYPES
 159 };
 160
 161 /* allow access to big endian 32bit upper/lower parts and 64bit var */
 162 struct kvmppc_exit_timing {
 163         union {
 164                 u64 tv64;
 165                 struct {
 166                         u32 tbu, tbl;
 167                 } tv32;
 168         };
 169 };
 170
 171 struct kvmppc_pginfo {
 172         unsigned long pfn;
 173         atomic_t refcnt;
 174 };
 175
 176 struct kvmppc_spapr_tce_table {
 177         struct list_head list;
 178         struct kvm *kvm;
 179         u64 liobn;
 180         u32 window_size;
 181         struct page *pages[0];
 182 };
 183
 184 struct kvmppc_linear_info {
 185         void            *base_virt;
 186         unsigned long    base_pfn;
 187         unsigned long    npages;
 188         struct list_head list;
 189         atomic_t         use_count;
 190         int              type;
 191 };
 192
 193 /*
 194  * The reverse mapping array has one entry for each HPTE,
 195  * which stores the guest's view of the second word of the HPTE
 196  * (including the guest physical address of the mapping),
 197  * plus forward and backward pointers in a doubly-linked ring
 198  * of HPTEs that map the same host page.  The pointers in this
 199  * ring are 32-bit HPTE indexes, to save space.
 200  */
 201 struct revmap_entry {
 202         unsigned long guest_rpte;
 203         unsigned int forw, back;
 204 };
 205
 206 /*
 207  * We use the top bit of each memslot->arch.rmap entry as a lock bit,
 208  * and bit 32 as a present flag.  The bottom 32 bits are the
 209  * index in the guest HPT of a HPTE that points to the page.
 210  */
 211 #define KVMPPC_RMAP_LOCK_BIT    63
 212 #define KVMPPC_RMAP_RC_SHIFT    32
 213 #define KVMPPC_RMAP_REFERENCED  (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT)
 214 #define KVMPPC_RMAP_CHANGED     (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT)
 215 #define KVMPPC_RMAP_PRESENT     0x100000000ul
 216 #define KVMPPC_RMAP_INDEX       0xfffffffful
 217
 218 /* Low-order bits in memslot->arch.slot_phys[] */
 219 #define KVMPPC_PAGE_ORDER_MASK  0x1f
 220 #define KVMPPC_PAGE_NO_CACHE    HPTE_R_I        /* 0x20 */
 221 #define KVMPPC_PAGE_WRITETHRU   HPTE_R_W        /* 0x40 */
 222 #define KVMPPC_GOT_PAGE         0x80
 223
 224 struct kvm_arch_memory_slot {
 225 #ifdef CONFIG_KVM_BOOK3S_64_HV
 226         unsigned long *rmap;
 227         unsigned long *slot_phys;
 228 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 229 };
 230
 231 struct kvm_arch {
 232         unsigned int lpid;
 233 #ifdef CONFIG_KVM_BOOK3S_64_HV
 234         unsigned long hpt_virt;
 235         struct revmap_entry *revmap;
 236         unsigned int host_lpid;
 237         unsigned long host_lpcr;
 238         unsigned long sdr1;
 239         unsigned long host_sdr1;
 240         int tlbie_lock;
 241         unsigned long lpcr;
 242         unsigned long rmor;
 243         struct kvmppc_linear_info *rma;
 244         unsigned long vrma_slb_v;
 245         int rma_setup_done;
 246         int using_mmu_notifiers;
 247         u32 hpt_order;
 248         atomic_t vcpus_running;
 249         u32 online_vcores;
 250         unsigned long hpt_npte;
 251         unsigned long hpt_mask;
 252         atomic_t hpte_mod_interest;
 253         spinlock_t slot_phys_lock;
 254         cpumask_t need_tlb_flush;
 255         struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
 256         struct kvmppc_linear_info *hpt_li;
 257 #endif /* CONFIG_KVM_BOOK3S_64_HV */
 258 #ifdef CONFIG_PPC_BOOK3S_64
 259         struct list_head spapr_tce_tables;
 260 #endif
 261 };
 262
 263 /*
 264  * Struct for a virtual core.
 265  * Note: entry_exit_count combines an entry count in the bottom 8 bits
 266  * and an exit count in the next 8 bits.  This is so that we can
 267  * atomically increment the entry count iff the exit count is 0
 268  * without taking the lock.
 269  */
 270 struct kvmppc_vcore {
 271         int n_runnable;
 272         int n_busy;
 273         int num_threads;
 274         int entry_exit_count;
 275         int n_woken;
 276         int nap_count;
 277         int napping_threads;
 278         u16 pcpu;
 279         u16 last_cpu;
 280         u8 vcore_state;
 281         u8 in_guest;
 282         struct list_head runnable_threads;
 283         spinlock_t lock;
 284         wait_queue_head_t wq;
 285         u64 stolen_tb;
 286         u64 preempt_tb;
 287         struct kvm_vcpu *runner;
 288 };
 289
 290 #define VCORE_ENTRY_COUNT(vc)   ((vc)->entry_exit_count & 0xff)
 291 #define VCORE_EXIT_COUNT(vc)    ((vc)->entry_exit_count >> 8)
 292
 293 /* Values for vcore_state */
 294 #define VCORE_INACTIVE  0
 295 #define VCORE_SLEEPING  1
 296 #define VCORE_STARTING  2
 297 #define VCORE_RUNNING   3
 298 #define VCORE_EXITING   4
 299
 300 /*
 301  * Struct used to manage memory for a virtual processor area
 302  * registered by a PAPR guest.  There are three types of area
 303  * that a guest can register.
 304  */
 305 struct kvmppc_vpa {
 306         void *pinned_addr;      /* Address in kernel linear mapping */
 307         void *pinned_end;       /* End of region */
 308         unsigned long next_gpa; /* Guest phys addr for update */
 309         unsigned long len;      /* Number of bytes required */
 310         u8 update_pending;      /* 1 => update pinned_addr from next_gpa */
 311 };
 312
 313 struct kvmppc_pte {
 314         ulong eaddr;
 315         u64 vpage;
 316         ulong raddr;
 317         bool may_read           : 1;
 318         bool may_write          : 1;
 319         bool may_execute        : 1;
 320 };
 321
 322 struct kvmppc_mmu {
 323         /* book3s_64 only */
 324         void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
 325         u64  (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
 326         u64  (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
 327         void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
 328         void (*slbia)(struct kvm_vcpu *vcpu);
 329         /* book3s */
 330         void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
 331         u32  (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
 332         int  (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data);
 333         void (*reset_msr)(struct kvm_vcpu *vcpu);
 334         void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
 335         int  (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
 336         u64  (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
 337         bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
 338 };
 339
 340 struct kvmppc_slb {
 341         u64 esid;
 342         u64 vsid;
 343         u64 orige;
 344         u64 origv;
 345         bool valid      : 1;
 346         bool Ks         : 1;
 347         bool Kp         : 1;
 348         bool nx         : 1;
 349         bool large      : 1;    /* PTEs are 16MB */
 350         bool tb         : 1;    /* 1TB segment */
 351         bool class      : 1;
 352 };
 353
 354 # ifdef CONFIG_PPC_FSL_BOOK3E
 355 #define KVMPPC_BOOKE_IAC_NUM    2
 356 #define KVMPPC_BOOKE_DAC_NUM    2
 357 # else
 358 #define KVMPPC_BOOKE_IAC_NUM    4
 359 #define KVMPPC_BOOKE_DAC_NUM    2
 360 # endif
 361 #define KVMPPC_BOOKE_MAX_IAC    4
 362 #define KVMPPC_BOOKE_MAX_DAC    2
 363
 364 struct kvmppc_booke_debug_reg {
 365         u32 dbcr0;
 366         u32 dbcr1;
 367         u32 dbcr2;
 368 #ifdef CONFIG_KVM_E500MC
 369         u32 dbcr4;
 370 #endif
 371         u64 iac[KVMPPC_BOOKE_MAX_IAC];
 372         u64 dac[KVMPPC_BOOKE_MAX_DAC];
 373 };
 374
 375 struct kvm_vcpu_arch {
 376         ulong host_stack;
 377         u32 host_pid;
 378 #ifdef CONFIG_PPC_BOOK3S
 379         struct kvmppc_slb slb[64];
 380         int slb_max;            /* 1 + index of last valid entry in slb[] */
 381         int slb_nr;             /* total number of entries in SLB */
 382         struct kvmppc_mmu mmu;
 383 #endif
 384
 385         ulong gpr[32];
 386
 387         u64 fpr[32];
 388         u64 fpscr;
 389
 390 #ifdef CONFIG_SPE
 391         ulong evr[32];
 392         ulong spefscr;
 393         ulong host_spefscr;
 394         u64 acc;
 395 #endif
 396 #ifdef CONFIG_ALTIVEC
 397         vector128 vr[32];
 398         vector128 vscr;
 399 #endif
 400
 401 #ifdef CONFIG_VSX
 402         u64 vsr[64];
 403 #endif
 404
 405 #ifdef CONFIG_KVM_BOOKE_HV
 406         u32 host_mas4;
 407         u32 host_mas6;
 408         u32 shadow_epcr;
 409         u32 shadow_msrp;
 410         u32 eplc;
 411         u32 epsc;
 412         u32 oldpir;
 413 #endif
 414
 415 #if defined(CONFIG_BOOKE)
 416 #if defined(CONFIG_KVM_BOOKE_HV) || defined(CONFIG_64BIT)
 417         u32 epcr;
 418 #endif
 419 #endif
 420
 421 #ifdef CONFIG_PPC_BOOK3S
 422         /* For Gekko paired singles */
 423         u32 qpr[32];
 424 #endif
 425
 426         ulong pc;
 427         ulong ctr;
 428         ulong lr;
 429
 430         ulong xer;
 431         u32 cr;
 432
 433 #ifdef CONFIG_PPC_BOOK3S
 434         ulong hflags;
 435         ulong guest_owned_ext;
 436         ulong purr;
 437         ulong spurr;
 438         ulong dscr;
 439         ulong amr;
 440         ulong uamor;
 441         u32 ctrl;
 442         ulong dabr;
 443 #endif
 444         u32 vrsave; /* also USPRG0 */
 445         u32 mmucr;
 446         /* shadow_msr is unused for BookE HV */
 447         ulong shadow_msr;
 448         ulong csrr0;
 449         ulong csrr1;
 450         ulong dsrr0;
 451         ulong dsrr1;
 452         ulong mcsrr0;
 453         ulong mcsrr1;
 454         ulong mcsr;
 455         u32 dec;
 456 #ifdef CONFIG_BOOKE
 457         u32 decar;
 458 #endif
 459         u32 tbl;
 460         u32 tbu;
 461         u32 tcr;
 462         ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
 463         u32 ivor[64];
 464         ulong ivpr;
 465         u32 pvr;
 466
 467         u32 shadow_pid;
 468         u32 shadow_pid1;
 469         u32 pid;
 470         u32 swap_pid;
 471
 472         u32 ccr0;
 473         u32 ccr1;
 474         u32 dbsr;
 475
 476         u64 mmcr[3];
 477         u32 pmc[8];
 478
 479 #ifdef CONFIG_KVM_EXIT_TIMING
 480         struct mutex exit_timing_lock;
 481         struct kvmppc_exit_timing timing_exit;
 482         struct kvmppc_exit_timing timing_last_enter;
 483         u32 last_exit_type;
 484         u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
 485         u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 486         u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 487         u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 488         u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
 489         u64 timing_last_exit;
 490         struct dentry *debugfs_exit_timing;
 491 #endif
 492
 493 #ifdef CONFIG_PPC_BOOK3S
 494         ulong fault_dar;
 495         u32 fault_dsisr;
 496 #endif
 497
 498 #ifdef CONFIG_BOOKE
 499         ulong fault_dear;
 500         ulong fault_esr;
 501         ulong queued_dear;
 502         ulong queued_esr;
 503         spinlock_t wdt_lock;
 504         struct timer_list wdt_timer;
 505         u32 tlbcfg[4];
 506         u32 mmucfg;
 507         u32 epr;
 508         struct kvmppc_booke_debug_reg dbg_reg;
 509 #endif
 510         gpa_t paddr_accessed;
 511         gva_t vaddr_accessed;
 512
 513         u8 io_gpr; /* GPR used as IO source/target */
 514         u8 mmio_is_bigendian;
 515         u8 mmio_sign_extend;
 516         u8 dcr_needed;
 517         u8 dcr_is_write;
 518         u8 osi_needed;
 519         u8 osi_enabled;
 520         u8 papr_enabled;
 521         u8 watchdog_enabled;
 522         u8 sane;
 523         u8 cpu_type;
 524         u8 hcall_needed;
 525
 526         u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
 527
 528         struct hrtimer dec_timer;
 529         struct tasklet_struct tasklet;
 530         u64 dec_jiffies;
 531         u64 dec_expires;
 532         unsigned long pending_exceptions;
 533         u8 ceded;
 534         u8 prodded;
 535         u32 last_inst;
 536
 537         wait_queue_head_t *wqp;
 538         struct kvmppc_vcore *vcore;
 539         int ret;
 540         int trap;
 541         int state;
 542         int ptid;
 543         bool timer_running;
 544         wait_queue_head_t cpu_run;
 545
 546         struct kvm_vcpu_arch_shared *shared;
 547         unsigned long magic_page_pa; /* phys addr to map the magic page to */
 548         unsigned long magic_page_ea; /* effect. addr to map the magic page to */
 549
 550 #ifdef CONFIG_KVM_BOOK3S_64_HV
 551         struct kvm_vcpu_arch_shared shregs;
 552
 553         unsigned long pgfault_addr;
 554         long pgfault_index;
 555         unsigned long pgfault_hpte[2];
 556
 557         struct list_head run_list;
 558         struct task_struct *run_task;
 559         struct kvm_run *kvm_run;
 560         pgd_t *pgdir;
 561
 562         spinlock_t vpa_update_lock;
 563         struct kvmppc_vpa vpa;
 564         struct kvmppc_vpa dtl;
 565         struct dtl_entry *dtl_ptr;
 566         unsigned long dtl_index;
 567         u64 stolen_logged;
 568         struct kvmppc_vpa slb_shadow;
 569
 570         spinlock_t tbacct_lock;
 571         u64 busy_stolen;
 572         u64 busy_preempt;
 573 #endif
 574 };
 575
 576 /* Values for vcpu->arch.state */
 577 #define KVMPPC_VCPU_NOTREADY            0
 578 #define KVMPPC_VCPU_RUNNABLE            1
 579 #define KVMPPC_VCPU_BUSY_IN_HOST        2
 580
 581 /* Values for vcpu->arch.io_gpr */
 582 #define KVM_MMIO_REG_MASK       0x001f
 583 #define KVM_MMIO_REG_EXT_MASK   0xffe0
 584 #define KVM_MMIO_REG_GPR        0x0000
 585 #define KVM_MMIO_REG_FPR        0x0020
 586 #define KVM_MMIO_REG_QPR        0x0040
 587 #define KVM_MMIO_REG_FQPR       0x0060
 588
 589 #define __KVM_HAVE_ARCH_WQP
 590
 591 #endif /* __POWERPC_KVM_HOST_H__ */