arch/s390/include/asm/kvm_host.h

   1 /*
   2  * definition for kernel virtual machines on s390
   3  *
   4  * Copyright IBM Corp. 2008, 2009
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License (version 2 only)
   8  * as published by the Free Software Foundation.
   9  *
  10  *    Author(s): Carsten Otte <cotte@de.ibm.com>
  11  */
  12
  13
  14 #ifndef ASM_KVM_HOST_H
  15 #define ASM_KVM_HOST_H
  16
  17 #include <linux/types.h>
  18 #include <linux/hrtimer.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/kvm_types.h>
  21 #include <linux/kvm_host.h>
  22 #include <linux/kvm.h>
  23 #include <asm/debug.h>
  24 #include <asm/cpu.h>
  25 #include <asm/isc.h>
  26
  27 #define KVM_MAX_VCPUS 64
  28 #define KVM_USER_MEM_SLOTS 32
  29
  30 /*
  31  * These seem to be used for allocating ->chip in the routing table,
  32  * which we don't use. 4096 is an out-of-thin-air value. If we need
  33  * to look at ->chip later on, we'll need to revisit this.
  34  */
  35 #define KVM_NR_IRQCHIPS 1
  36 #define KVM_IRQCHIP_NUM_PINS 4096
  37
  38 #define SIGP_CTRL_C     0x00800000
  39
  40 struct sca_entry {
  41         atomic_t ctrl;
  42         __u32   reserved;
  43         __u64   sda;
  44         __u64   reserved2[2];
  45 } __attribute__((packed));
  46
  47 union ipte_control {
  48         unsigned long val;
  49         struct {
  50                 unsigned long k  : 1;
  51                 unsigned long kh : 31;
  52                 unsigned long kg : 32;
  53         };
  54 };
  55
  56 struct sca_block {
  57         union ipte_control ipte_control;
  58         __u64   reserved[5];
  59         __u64   mcn;
  60         __u64   reserved2;
  61         struct sca_entry cpu[64];
  62 } __attribute__((packed));
  63
  64 #define CPUSTAT_STOPPED    0x80000000
  65 #define CPUSTAT_WAIT       0x10000000
  66 #define CPUSTAT_ECALL_PEND 0x08000000
  67 #define CPUSTAT_STOP_INT   0x04000000
  68 #define CPUSTAT_IO_INT     0x02000000
  69 #define CPUSTAT_EXT_INT    0x01000000
  70 #define CPUSTAT_RUNNING    0x00800000
  71 #define CPUSTAT_RETAINED   0x00400000
  72 #define CPUSTAT_TIMING_SUB 0x00020000
  73 #define CPUSTAT_SIE_SUB    0x00010000
  74 #define CPUSTAT_RRF        0x00008000
  75 #define CPUSTAT_SLSV       0x00004000
  76 #define CPUSTAT_SLSR       0x00002000
  77 #define CPUSTAT_ZARCH      0x00000800
  78 #define CPUSTAT_MCDS       0x00000100
  79 #define CPUSTAT_SM         0x00000080
  80 #define CPUSTAT_IBS        0x00000040
  81 #define CPUSTAT_G          0x00000008
  82 #define CPUSTAT_GED        0x00000004
  83 #define CPUSTAT_J          0x00000002
  84 #define CPUSTAT_P          0x00000001
  85
  86 struct kvm_s390_sie_block {
  87         atomic_t cpuflags;              /* 0x0000 */
  88         __u32 : 1;                      /* 0x0004 */
  89         __u32 prefix : 18;
  90         __u32 : 13;
  91         __u8    reserved08[4];          /* 0x0008 */
  92 #define PROG_IN_SIE (1<<0)
  93         __u32   prog0c;                 /* 0x000c */
  94         __u8    reserved10[16];         /* 0x0010 */
  95 #define PROG_BLOCK_SIE 0x00000001
  96         atomic_t prog20;                /* 0x0020 */
  97         __u8    reserved24[4];          /* 0x0024 */
  98         __u64   cputm;                  /* 0x0028 */
  99         __u64   ckc;                    /* 0x0030 */
 100         __u64   epoch;                  /* 0x0038 */
 101         __u8    reserved40[4];          /* 0x0040 */
 102 #define LCTL_CR0        0x8000
 103 #define LCTL_CR6        0x0200
 104 #define LCTL_CR9        0x0040
 105 #define LCTL_CR10       0x0020
 106 #define LCTL_CR11       0x0010
 107 #define LCTL_CR14       0x0002
 108         __u16   lctl;                   /* 0x0044 */
 109         __s16   icpua;                  /* 0x0046 */
 110 #define ICTL_PINT       0x20000000
 111 #define ICTL_LPSW       0x00400000
 112 #define ICTL_STCTL      0x00040000
 113 #define ICTL_ISKE       0x00004000
 114 #define ICTL_SSKE       0x00002000
 115 #define ICTL_RRBE       0x00001000
 116 #define ICTL_TPROT      0x00000200
 117         __u32   ictl;                   /* 0x0048 */
 118         __u32   eca;                    /* 0x004c */
 119 #define ICPT_INST       0x04
 120 #define ICPT_PROGI      0x08
 121 #define ICPT_INSTPROGI  0x0C
 122 #define ICPT_OPEREXC    0x2C
 123 #define ICPT_PARTEXEC   0x38
 124 #define ICPT_IOINST     0x40
 125         __u8    icptcode;               /* 0x0050 */
 126         __u8    icptstatus;             /* 0x0051 */
 127         __u16   ihcpu;                  /* 0x0052 */
 128         __u8    reserved54[2];          /* 0x0054 */
 129         __u16   ipa;                    /* 0x0056 */
 130         __u32   ipb;                    /* 0x0058 */
 131         __u32   scaoh;                  /* 0x005c */
 132         __u8    reserved60;             /* 0x0060 */
 133         __u8    ecb;                    /* 0x0061 */
 134         __u8    ecb2;                   /* 0x0062 */
 135         __u8    reserved63[1];          /* 0x0063 */
 136         __u32   scaol;                  /* 0x0064 */
 137         __u8    reserved68[4];          /* 0x0068 */
 138         __u32   todpr;                  /* 0x006c */
 139         __u8    reserved70[32];         /* 0x0070 */
 140         psw_t   gpsw;                   /* 0x0090 */
 141         __u64   gg14;                   /* 0x00a0 */
 142         __u64   gg15;                   /* 0x00a8 */
 143         __u8    reservedb0[20];         /* 0x00b0 */
 144         __u16   extcpuaddr;             /* 0x00c4 */
 145         __u16   eic;                    /* 0x00c6 */
 146         __u32   reservedc8;             /* 0x00c8 */
 147         __u16   pgmilc;                 /* 0x00cc */
 148         __u16   iprcc;                  /* 0x00ce */
 149         __u32   dxc;                    /* 0x00d0 */
 150         __u16   mcn;                    /* 0x00d4 */
 151         __u8    perc;                   /* 0x00d6 */
 152         __u8    peratmid;               /* 0x00d7 */
 153         __u64   peraddr;                /* 0x00d8 */
 154         __u8    eai;                    /* 0x00e0 */
 155         __u8    peraid;                 /* 0x00e1 */
 156         __u8    oai;                    /* 0x00e2 */
 157         __u8    armid;                  /* 0x00e3 */
 158         __u8    reservede4[4];          /* 0x00e4 */
 159         __u64   tecmc;                  /* 0x00e8 */
 160         __u8    reservedf0[12];         /* 0x00f0 */
 161 #define CRYCB_FORMAT1 0x00000001
 162         __u32   crycbd;                 /* 0x00fc */
 163         __u64   gcr[16];                /* 0x0100 */
 164         __u64   gbea;                   /* 0x0180 */
 165         __u8    reserved188[24];        /* 0x0188 */
 166         __u32   fac;                    /* 0x01a0 */
 167         __u8    reserved1a4[20];        /* 0x01a4 */
 168         __u64   cbrlo;                  /* 0x01b8 */
 169         __u8    reserved1c0[30];        /* 0x01c0 */
 170         __u64   pp;                     /* 0x01de */
 171         __u8    reserved1e6[2];         /* 0x01e6 */
 172         __u64   itdba;                  /* 0x01e8 */
 173         __u8    reserved1f0[16];        /* 0x01f0 */
 174 } __attribute__((packed));
 175
 176 struct kvm_s390_itdb {
 177         __u8    data[256];
 178 } __packed;
 179
 180 struct sie_page {
 181         struct kvm_s390_sie_block sie_block;
 182         __u8 reserved200[1024];         /* 0x0200 */
 183         struct kvm_s390_itdb itdb;      /* 0x0600 */
 184         __u8 reserved700[2304];         /* 0x0700 */
 185 } __packed;
 186
 187 struct kvm_vcpu_stat {
 188         u32 exit_userspace;
 189         u32 exit_null;
 190         u32 exit_external_request;
 191         u32 exit_external_interrupt;
 192         u32 exit_stop_request;
 193         u32 exit_validity;
 194         u32 exit_instruction;
 195         u32 halt_wakeup;
 196         u32 instruction_lctl;
 197         u32 instruction_lctlg;
 198         u32 instruction_stctl;
 199         u32 instruction_stctg;
 200         u32 exit_program_interruption;
 201         u32 exit_instr_and_program;
 202         u32 deliver_external_call;
 203         u32 deliver_emergency_signal;
 204         u32 deliver_service_signal;
 205         u32 deliver_virtio_interrupt;
 206         u32 deliver_stop_signal;
 207         u32 deliver_prefix_signal;
 208         u32 deliver_restart_signal;
 209         u32 deliver_program_int;
 210         u32 deliver_io_int;
 211         u32 exit_wait_state;
 212         u32 instruction_pfmf;
 213         u32 instruction_stidp;
 214         u32 instruction_spx;
 215         u32 instruction_stpx;
 216         u32 instruction_stap;
 217         u32 instruction_storage_key;
 218         u32 instruction_ipte_interlock;
 219         u32 instruction_stsch;
 220         u32 instruction_chsc;
 221         u32 instruction_stsi;
 222         u32 instruction_stfl;
 223         u32 instruction_tprot;
 224         u32 instruction_essa;
 225         u32 instruction_sigp_sense;
 226         u32 instruction_sigp_sense_running;
 227         u32 instruction_sigp_external_call;
 228         u32 instruction_sigp_emergency;
 229         u32 instruction_sigp_cond_emergency;
 230         u32 instruction_sigp_start;
 231         u32 instruction_sigp_stop;
 232         u32 instruction_sigp_stop_store_status;
 233         u32 instruction_sigp_store_status;
 234         u32 instruction_sigp_arch;
 235         u32 instruction_sigp_prefix;
 236         u32 instruction_sigp_restart;
 237         u32 instruction_sigp_init_cpu_reset;
 238         u32 instruction_sigp_cpu_reset;
 239         u32 instruction_sigp_unknown;
 240         u32 diagnose_10;
 241         u32 diagnose_44;
 242         u32 diagnose_9c;
 243 };
 244
 245 #define PGM_OPERATION                   0x01
 246 #define PGM_PRIVILEGED_OP               0x02
 247 #define PGM_EXECUTE                     0x03
 248 #define PGM_PROTECTION                  0x04
 249 #define PGM_ADDRESSING                  0x05
 250 #define PGM_SPECIFICATION               0x06
 251 #define PGM_DATA                        0x07
 252 #define PGM_FIXED_POINT_OVERFLOW        0x08
 253 #define PGM_FIXED_POINT_DIVIDE          0x09
 254 #define PGM_DECIMAL_OVERFLOW            0x0a
 255 #define PGM_DECIMAL_DIVIDE              0x0b
 256 #define PGM_HFP_EXPONENT_OVERFLOW       0x0c
 257 #define PGM_HFP_EXPONENT_UNDERFLOW      0x0d
 258 #define PGM_HFP_SIGNIFICANCE            0x0e
 259 #define PGM_HFP_DIVIDE                  0x0f
 260 #define PGM_SEGMENT_TRANSLATION         0x10
 261 #define PGM_PAGE_TRANSLATION            0x11
 262 #define PGM_TRANSLATION_SPEC            0x12
 263 #define PGM_SPECIAL_OPERATION           0x13
 264 #define PGM_OPERAND                     0x15
 265 #define PGM_TRACE_TABEL                 0x16
 266 #define PGM_SPACE_SWITCH                0x1c
 267 #define PGM_HFP_SQUARE_ROOT             0x1d
 268 #define PGM_PC_TRANSLATION_SPEC         0x1f
 269 #define PGM_AFX_TRANSLATION             0x20
 270 #define PGM_ASX_TRANSLATION             0x21
 271 #define PGM_LX_TRANSLATION              0x22
 272 #define PGM_EX_TRANSLATION              0x23
 273 #define PGM_PRIMARY_AUTHORITY           0x24
 274 #define PGM_SECONDARY_AUTHORITY         0x25
 275 #define PGM_LFX_TRANSLATION             0x26
 276 #define PGM_LSX_TRANSLATION             0x27
 277 #define PGM_ALET_SPECIFICATION          0x28
 278 #define PGM_ALEN_TRANSLATION            0x29
 279 #define PGM_ALE_SEQUENCE                0x2a
 280 #define PGM_ASTE_VALIDITY               0x2b
 281 #define PGM_ASTE_SEQUENCE               0x2c
 282 #define PGM_EXTENDED_AUTHORITY          0x2d
 283 #define PGM_LSTE_SEQUENCE               0x2e
 284 #define PGM_ASTE_INSTANCE               0x2f
 285 #define PGM_STACK_FULL                  0x30
 286 #define PGM_STACK_EMPTY                 0x31
 287 #define PGM_STACK_SPECIFICATION         0x32
 288 #define PGM_STACK_TYPE                  0x33
 289 #define PGM_STACK_OPERATION             0x34
 290 #define PGM_ASCE_TYPE                   0x38
 291 #define PGM_REGION_FIRST_TRANS          0x39
 292 #define PGM_REGION_SECOND_TRANS         0x3a
 293 #define PGM_REGION_THIRD_TRANS          0x3b
 294 #define PGM_MONITOR                     0x40
 295 #define PGM_PER                         0x80
 296 #define PGM_CRYPTO_OPERATION            0x119
 297
 298 /* irq types in order of priority */
 299 enum irq_types {
 300         IRQ_PEND_MCHK_EX = 0,
 301         IRQ_PEND_SVC,
 302         IRQ_PEND_PROG,
 303         IRQ_PEND_MCHK_REP,
 304         IRQ_PEND_EXT_IRQ_KEY,
 305         IRQ_PEND_EXT_MALFUNC,
 306         IRQ_PEND_EXT_EMERGENCY,
 307         IRQ_PEND_EXT_EXTERNAL,
 308         IRQ_PEND_EXT_CLOCK_COMP,
 309         IRQ_PEND_EXT_CPU_TIMER,
 310         IRQ_PEND_EXT_TIMING,
 311         IRQ_PEND_EXT_SERVICE,
 312         IRQ_PEND_EXT_HOST,
 313         IRQ_PEND_PFAULT_INIT,
 314         IRQ_PEND_PFAULT_DONE,
 315         IRQ_PEND_VIRTIO,
 316         IRQ_PEND_IO_ISC_0,
 317         IRQ_PEND_IO_ISC_1,
 318         IRQ_PEND_IO_ISC_2,
 319         IRQ_PEND_IO_ISC_3,
 320         IRQ_PEND_IO_ISC_4,
 321         IRQ_PEND_IO_ISC_5,
 322         IRQ_PEND_IO_ISC_6,
 323         IRQ_PEND_IO_ISC_7,
 324         IRQ_PEND_SIGP_STOP,
 325         IRQ_PEND_RESTART,
 326         IRQ_PEND_SET_PREFIX,
 327         IRQ_PEND_COUNT
 328 };
 329
 330 /*
 331  * Repressible (non-floating) machine check interrupts
 332  * subclass bits in MCIC
 333  */
 334 #define MCHK_EXTD_BIT 58
 335 #define MCHK_DEGR_BIT 56
 336 #define MCHK_WARN_BIT 55
 337 #define MCHK_REP_MASK ((1UL << MCHK_DEGR_BIT) | \
 338                        (1UL << MCHK_EXTD_BIT) | \
 339                        (1UL << MCHK_WARN_BIT))
 340
 341 /* Exigent machine check interrupts subclass bits in MCIC */
 342 #define MCHK_SD_BIT 63
 343 #define MCHK_PD_BIT 62
 344 #define MCHK_EX_MASK ((1UL << MCHK_SD_BIT) | (1UL << MCHK_PD_BIT))
 345
 346 #define IRQ_PEND_EXT_MASK ((1UL << IRQ_PEND_EXT_IRQ_KEY)    | \
 347                            (1UL << IRQ_PEND_EXT_CLOCK_COMP) | \
 348                            (1UL << IRQ_PEND_EXT_CPU_TIMER)  | \
 349                            (1UL << IRQ_PEND_EXT_MALFUNC)    | \
 350                            (1UL << IRQ_PEND_EXT_EMERGENCY)  | \
 351                            (1UL << IRQ_PEND_EXT_EXTERNAL)   | \
 352                            (1UL << IRQ_PEND_EXT_TIMING)     | \
 353                            (1UL << IRQ_PEND_EXT_HOST)       | \
 354                            (1UL << IRQ_PEND_EXT_SERVICE)    | \
 355                            (1UL << IRQ_PEND_VIRTIO)         | \
 356                            (1UL << IRQ_PEND_PFAULT_INIT)    | \
 357                            (1UL << IRQ_PEND_PFAULT_DONE))
 358
 359 #define IRQ_PEND_IO_MASK ((1UL << IRQ_PEND_IO_ISC_0) | \
 360                           (1UL << IRQ_PEND_IO_ISC_1) | \
 361                           (1UL << IRQ_PEND_IO_ISC_2) | \
 362                           (1UL << IRQ_PEND_IO_ISC_3) | \
 363                           (1UL << IRQ_PEND_IO_ISC_4) | \
 364                           (1UL << IRQ_PEND_IO_ISC_5) | \
 365                           (1UL << IRQ_PEND_IO_ISC_6) | \
 366                           (1UL << IRQ_PEND_IO_ISC_7))
 367
 368 #define IRQ_PEND_MCHK_MASK ((1UL << IRQ_PEND_MCHK_REP) | \
 369                             (1UL << IRQ_PEND_MCHK_EX))
 370
 371 struct kvm_s390_interrupt_info {
 372         struct list_head list;
 373         u64     type;
 374         union {
 375                 struct kvm_s390_io_info io;
 376                 struct kvm_s390_ext_info ext;
 377                 struct kvm_s390_pgm_info pgm;
 378                 struct kvm_s390_emerg_info emerg;
 379                 struct kvm_s390_extcall_info extcall;
 380                 struct kvm_s390_prefix_info prefix;
 381                 struct kvm_s390_mchk_info mchk;
 382         };
 383 };
 384
 385 /* for local_interrupt.action_flags */
 386 #define ACTION_STORE_ON_STOP            (1<<0)
 387 #define ACTION_STOP_ON_STOP             (1<<1)
 388
 389 struct kvm_s390_irq_payload {
 390         struct kvm_s390_io_info io;
 391         struct kvm_s390_ext_info ext;
 392         struct kvm_s390_pgm_info pgm;
 393         struct kvm_s390_emerg_info emerg;
 394         struct kvm_s390_extcall_info extcall;
 395         struct kvm_s390_prefix_info prefix;
 396         struct kvm_s390_mchk_info mchk;
 397 };
 398
 399 struct kvm_s390_local_interrupt {
 400         spinlock_t lock;
 401         struct kvm_s390_float_interrupt *float_int;
 402         wait_queue_head_t *wq;
 403         atomic_t *cpuflags;
 404         unsigned int action_bits;
 405         DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
 406         struct kvm_s390_irq_payload irq;
 407         unsigned long pending_irqs;
 408 };
 409
 410 struct kvm_s390_float_interrupt {
 411         spinlock_t lock;
 412         struct list_head list;
 413         atomic_t active;
 414         int next_rr_cpu;
 415         unsigned long idle_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
 416         unsigned int irq_count;
 417 };
 418
 419 struct kvm_hw_wp_info_arch {
 420         unsigned long addr;
 421         unsigned long phys_addr;
 422         int len;
 423         char *old_data;
 424 };
 425
 426 struct kvm_hw_bp_info_arch {
 427         unsigned long addr;
 428         int len;
 429 };
 430
 431 /*
 432  * Only the upper 16 bits of kvm_guest_debug->control are arch specific.
 433  * Further KVM_GUESTDBG flags which an be used from userspace can be found in
 434  * arch/s390/include/uapi/asm/kvm.h
 435  */
 436 #define KVM_GUESTDBG_EXIT_PENDING 0x10000000
 437
 438 #define guestdbg_enabled(vcpu) \
 439                 (vcpu->guest_debug & KVM_GUESTDBG_ENABLE)
 440 #define guestdbg_sstep_enabled(vcpu) \
 441                 (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
 442 #define guestdbg_hw_bp_enabled(vcpu) \
 443                 (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
 444 #define guestdbg_exit_pending(vcpu) (guestdbg_enabled(vcpu) && \
 445                 (vcpu->guest_debug & KVM_GUESTDBG_EXIT_PENDING))
 446
 447 struct kvm_guestdbg_info_arch {
 448         unsigned long cr0;
 449         unsigned long cr9;
 450         unsigned long cr10;
 451         unsigned long cr11;
 452         struct kvm_hw_bp_info_arch *hw_bp_info;
 453         struct kvm_hw_wp_info_arch *hw_wp_info;
 454         int nr_hw_bp;
 455         int nr_hw_wp;
 456         unsigned long last_bp;
 457 };
 458
 459 struct kvm_vcpu_arch {
 460         struct kvm_s390_sie_block *sie_block;
 461         s390_fp_regs      host_fpregs;
 462         unsigned int      host_acrs[NUM_ACRS];
 463         s390_fp_regs      guest_fpregs;
 464         struct kvm_s390_local_interrupt local_int;
 465         struct hrtimer    ckc_timer;
 466         struct kvm_s390_pgm_info pgm;
 467         union  {
 468                 struct cpuid    cpu_id;
 469                 u64             stidp_data;
 470         };
 471         struct gmap *gmap;
 472         struct kvm_guestdbg_info_arch guestdbg;
 473 #define KVM_S390_PFAULT_TOKEN_INVALID   (-1UL)
 474         unsigned long pfault_token;
 475         unsigned long pfault_select;
 476         unsigned long pfault_compare;
 477 };
 478
 479 struct kvm_vm_stat {
 480         u32 remote_tlb_flush;
 481 };
 482
 483 struct kvm_arch_memory_slot {
 484 };
 485
 486 struct s390_map_info {
 487         struct list_head list;
 488         __u64 guest_addr;
 489         __u64 addr;
 490         struct page *page;
 491 };
 492
 493 struct s390_io_adapter {
 494         unsigned int id;
 495         int isc;
 496         bool maskable;
 497         bool masked;
 498         bool swap;
 499         struct rw_semaphore maps_lock;
 500         struct list_head maps;
 501         atomic_t nr_maps;
 502 };
 503
 504 #define MAX_S390_IO_ADAPTERS ((MAX_ISC + 1) * 8)
 505 #define MAX_S390_ADAPTER_MAPS 256
 506
 507 struct kvm_s390_crypto {
 508         struct kvm_s390_crypto_cb *crycb;
 509         __u32 crycbd;
 510 };
 511
 512 struct kvm_s390_crypto_cb {
 513         __u8    reserved00[128];                /* 0x0000 */
 514 };
 515
 516 struct kvm_arch{
 517         struct sca_block *sca;
 518         debug_info_t *dbf;
 519         struct kvm_s390_float_interrupt float_int;
 520         struct kvm_device *flic;
 521         struct gmap *gmap;
 522         int css_support;
 523         int use_irqchip;
 524         int use_cmma;
 525         int user_cpu_state_ctrl;
 526         struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS];
 527         wait_queue_head_t ipte_wq;
 528         int ipte_lock_count;
 529         struct mutex ipte_mutex;
 530         spinlock_t start_stop_lock;
 531         struct kvm_s390_crypto crypto;
 532 };
 533
 534 #define KVM_HVA_ERR_BAD         (-1UL)
 535 #define KVM_HVA_ERR_RO_BAD      (-2UL)
 536
 537 static inline bool kvm_is_error_hva(unsigned long addr)
 538 {
 539         return IS_ERR_VALUE(addr);
 540 }
 541
 542 #define ASYNC_PF_PER_VCPU       64
 543 struct kvm_arch_async_pf {
 544         unsigned long pfault_token;
 545 };
 546
 547 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
 548
 549 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
 550                                struct kvm_async_pf *work);
 551
 552 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
 553                                      struct kvm_async_pf *work);
 554
 555 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
 556                                  struct kvm_async_pf *work);
 557
 558 extern int sie64a(struct kvm_s390_sie_block *, u64 *);
 559 extern char sie_exit;
 560
 561 static inline void kvm_arch_hardware_disable(void) {}
 562 static inline void kvm_arch_check_processor_compat(void *rtn) {}
 563 static inline void kvm_arch_exit(void) {}
 564 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
 565 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
 566 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
 567 static inline void kvm_arch_free_memslot(struct kvm *kvm,
 568                 struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
 569 static inline void kvm_arch_memslots_updated(struct kvm *kvm) {}
 570 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
 571 static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 572                 struct kvm_memory_slot *slot) {}
 573
 574 #endif