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 #include <linux/hrtimer.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/kvm_host.h>
  19 #include <linux/kvm.h>
  20 #include <asm/debug.h>
  21 #include <asm/cpu.h>
  22 #include <asm/isc.h>
  23
  24 #define KVM_MAX_VCPUS 64
  25 #define KVM_USER_MEM_SLOTS 32
  26
  27 /*
  28  * These seem to be used for allocating ->chip in the routing table,
  29  * which we don't use. 4096 is an out-of-thin-air value. If we need
  30  * to look at ->chip later on, we'll need to revisit this.
  31  */
  32 #define KVM_NR_IRQCHIPS 1
  33 #define KVM_IRQCHIP_NUM_PINS 4096
  34
  35 struct sca_entry {
  36         atomic_t scn;
  37         __u32   reserved;
  38         __u64   sda;
  39         __u64   reserved2[2];
  40 } __attribute__((packed));
  41
  42 union ipte_control {
  43         unsigned long val;
  44         struct {
  45                 unsigned long k  : 1;
  46                 unsigned long kh : 31;
  47                 unsigned long kg : 32;
  48         };
  49 };
  50
  51 struct sca_block {
  52         union ipte_control ipte_control;
  53         __u64   reserved[5];
  54         __u64   mcn;
  55         __u64   reserved2;
  56         struct sca_entry cpu[64];
  57 } __attribute__((packed));
  58
  59 #define CPUSTAT_STOPPED    0x80000000
  60 #define CPUSTAT_WAIT       0x10000000
  61 #define CPUSTAT_ECALL_PEND 0x08000000
  62 #define CPUSTAT_STOP_INT   0x04000000
  63 #define CPUSTAT_IO_INT     0x02000000
  64 #define CPUSTAT_EXT_INT    0x01000000
  65 #define CPUSTAT_RUNNING    0x00800000
  66 #define CPUSTAT_RETAINED   0x00400000
  67 #define CPUSTAT_TIMING_SUB 0x00020000
  68 #define CPUSTAT_SIE_SUB    0x00010000
  69 #define CPUSTAT_RRF        0x00008000
  70 #define CPUSTAT_SLSV       0x00004000
  71 #define CPUSTAT_SLSR       0x00002000
  72 #define CPUSTAT_ZARCH      0x00000800
  73 #define CPUSTAT_MCDS       0x00000100
  74 #define CPUSTAT_SM         0x00000080
  75 #define CPUSTAT_IBS        0x00000040
  76 #define CPUSTAT_G          0x00000008
  77 #define CPUSTAT_GED        0x00000004
  78 #define CPUSTAT_J          0x00000002
  79 #define CPUSTAT_P          0x00000001
  80
  81 struct kvm_s390_sie_block {
  82         atomic_t cpuflags;              /* 0x0000 */
  83         __u32   prefix;                 /* 0x0004 */
  84         __u8    reserved08[4];          /* 0x0008 */
  85 #define PROG_IN_SIE (1<<0)
  86         __u32   prog0c;                 /* 0x000c */
  87         __u8    reserved10[16];         /* 0x0010 */
  88 #define PROG_BLOCK_SIE 0x00000001
  89         atomic_t prog20;                /* 0x0020 */
  90         __u8    reserved24[4];          /* 0x0024 */
  91         __u64   cputm;                  /* 0x0028 */
  92         __u64   ckc;                    /* 0x0030 */
  93         __u64   epoch;                  /* 0x0038 */
  94         __u8    reserved40[4];          /* 0x0040 */
  95 #define LCTL_CR0        0x8000
  96 #define LCTL_CR6        0x0200
  97 #define LCTL_CR9        0x0040
  98 #define LCTL_CR10       0x0020
  99 #define LCTL_CR11       0x0010
 100 #define LCTL_CR14       0x0002
 101         __u16   lctl;                   /* 0x0044 */
 102         __s16   icpua;                  /* 0x0046 */
 103 #define ICTL_PINT       0x20000000
 104 #define ICTL_LPSW       0x00400000
 105 #define ICTL_STCTL      0x00040000
 106 #define ICTL_ISKE       0x00004000
 107 #define ICTL_SSKE       0x00002000
 108 #define ICTL_RRBE       0x00001000
 109         __u32   ictl;                   /* 0x0048 */
 110         __u32   eca;                    /* 0x004c */
 111 #define ICPT_INST       0x04
 112 #define ICPT_PROGI      0x08
 113 #define ICPT_INSTPROGI  0x0C
 114 #define ICPT_OPEREXC    0x2C
 115 #define ICPT_PARTEXEC   0x38
 116 #define ICPT_IOINST     0x40
 117         __u8    icptcode;               /* 0x0050 */
 118         __u8    reserved51;             /* 0x0051 */
 119         __u16   ihcpu;                  /* 0x0052 */
 120         __u8    reserved54[2];          /* 0x0054 */
 121         __u16   ipa;                    /* 0x0056 */
 122         __u32   ipb;                    /* 0x0058 */
 123         __u32   scaoh;                  /* 0x005c */
 124         __u8    reserved60;             /* 0x0060 */
 125         __u8    ecb;                    /* 0x0061 */
 126         __u8    ecb2;                   /* 0x0062 */
 127         __u8    reserved63[1];          /* 0x0063 */
 128         __u32   scaol;                  /* 0x0064 */
 129         __u8    reserved68[4];          /* 0x0068 */
 130         __u32   todpr;                  /* 0x006c */
 131         __u8    reserved70[32];         /* 0x0070 */
 132         psw_t   gpsw;                   /* 0x0090 */
 133         __u64   gg14;                   /* 0x00a0 */
 134         __u64   gg15;                   /* 0x00a8 */
 135         __u8    reservedb0[20];         /* 0x00b0 */
 136         __u16   extcpuaddr;             /* 0x00c4 */
 137         __u16   eic;                    /* 0x00c6 */
 138         __u32   reservedc8;             /* 0x00c8 */
 139         __u16   pgmilc;                 /* 0x00cc */
 140         __u16   iprcc;                  /* 0x00ce */
 141         __u32   dxc;                    /* 0x00d0 */
 142         __u16   mcn;                    /* 0x00d4 */
 143         __u8    perc;                   /* 0x00d6 */
 144         __u8    peratmid;               /* 0x00d7 */
 145         __u64   peraddr;                /* 0x00d8 */
 146         __u8    eai;                    /* 0x00e0 */
 147         __u8    peraid;                 /* 0x00e1 */
 148         __u8    oai;                    /* 0x00e2 */
 149         __u8    armid;                  /* 0x00e3 */
 150         __u8    reservede4[4];          /* 0x00e4 */
 151         __u64   tecmc;                  /* 0x00e8 */
 152         __u8    reservedf0[16];         /* 0x00f0 */
 153         __u64   gcr[16];                /* 0x0100 */
 154         __u64   gbea;                   /* 0x0180 */
 155         __u8    reserved188[24];        /* 0x0188 */
 156         __u32   fac;                    /* 0x01a0 */
 157         __u8    reserved1a4[20];        /* 0x01a4 */
 158         __u64   cbrlo;                  /* 0x01b8 */
 159         __u8    reserved1c0[30];        /* 0x01c0 */
 160         __u64   pp;                     /* 0x01de */
 161         __u8    reserved1e6[2];         /* 0x01e6 */
 162         __u64   itdba;                  /* 0x01e8 */
 163         __u8    reserved1f0[16];        /* 0x01f0 */
 164 } __attribute__((packed));
 165
 166 struct kvm_s390_itdb {
 167         __u8    data[256];
 168 } __packed;
 169
 170 struct sie_page {
 171         struct kvm_s390_sie_block sie_block;
 172         __u8 reserved200[1024];         /* 0x0200 */
 173         struct kvm_s390_itdb itdb;      /* 0x0600 */
 174         __u8 reserved700[2304];         /* 0x0700 */
 175 } __packed;
 176
 177 struct kvm_vcpu_stat {
 178         u32 exit_userspace;
 179         u32 exit_null;
 180         u32 exit_external_request;
 181         u32 exit_external_interrupt;
 182         u32 exit_stop_request;
 183         u32 exit_validity;
 184         u32 exit_instruction;
 185         u32 instruction_lctl;
 186         u32 instruction_lctlg;
 187         u32 instruction_stctl;
 188         u32 instruction_stctg;
 189         u32 exit_program_interruption;
 190         u32 exit_instr_and_program;
 191         u32 deliver_external_call;
 192         u32 deliver_emergency_signal;
 193         u32 deliver_service_signal;
 194         u32 deliver_virtio_interrupt;
 195         u32 deliver_stop_signal;
 196         u32 deliver_prefix_signal;
 197         u32 deliver_restart_signal;
 198         u32 deliver_program_int;
 199         u32 deliver_io_int;
 200         u32 exit_wait_state;
 201         u32 instruction_pfmf;
 202         u32 instruction_stidp;
 203         u32 instruction_spx;
 204         u32 instruction_stpx;
 205         u32 instruction_stap;
 206         u32 instruction_storage_key;
 207         u32 instruction_ipte_interlock;
 208         u32 instruction_stsch;
 209         u32 instruction_chsc;
 210         u32 instruction_stsi;
 211         u32 instruction_stfl;
 212         u32 instruction_tprot;
 213         u32 instruction_essa;
 214         u32 instruction_sigp_sense;
 215         u32 instruction_sigp_sense_running;
 216         u32 instruction_sigp_external_call;
 217         u32 instruction_sigp_emergency;
 218         u32 instruction_sigp_stop;
 219         u32 instruction_sigp_arch;
 220         u32 instruction_sigp_prefix;
 221         u32 instruction_sigp_restart;
 222         u32 diagnose_10;
 223         u32 diagnose_44;
 224         u32 diagnose_9c;
 225 };
 226
 227 #define PGM_OPERATION                   0x01
 228 #define PGM_PRIVILEGED_OP               0x02
 229 #define PGM_EXECUTE                     0x03
 230 #define PGM_PROTECTION                  0x04
 231 #define PGM_ADDRESSING                  0x05
 232 #define PGM_SPECIFICATION               0x06
 233 #define PGM_DATA                        0x07
 234 #define PGM_FIXED_POINT_OVERFLOW        0x08
 235 #define PGM_FIXED_POINT_DIVIDE          0x09
 236 #define PGM_DECIMAL_OVERFLOW            0x0a
 237 #define PGM_DECIMAL_DIVIDE              0x0b
 238 #define PGM_HFP_EXPONENT_OVERFLOW       0x0c
 239 #define PGM_HFP_EXPONENT_UNDERFLOW      0x0d
 240 #define PGM_HFP_SIGNIFICANCE            0x0e
 241 #define PGM_HFP_DIVIDE                  0x0f
 242 #define PGM_SEGMENT_TRANSLATION         0x10
 243 #define PGM_PAGE_TRANSLATION            0x11
 244 #define PGM_TRANSLATION_SPEC            0x12
 245 #define PGM_SPECIAL_OPERATION           0x13
 246 #define PGM_OPERAND                     0x15
 247 #define PGM_TRACE_TABEL                 0x16
 248 #define PGM_SPACE_SWITCH                0x1c
 249 #define PGM_HFP_SQUARE_ROOT             0x1d
 250 #define PGM_PC_TRANSLATION_SPEC         0x1f
 251 #define PGM_AFX_TRANSLATION             0x20
 252 #define PGM_ASX_TRANSLATION             0x21
 253 #define PGM_LX_TRANSLATION              0x22
 254 #define PGM_EX_TRANSLATION              0x23
 255 #define PGM_PRIMARY_AUTHORITY           0x24
 256 #define PGM_SECONDARY_AUTHORITY         0x25
 257 #define PGM_LFX_TRANSLATION             0x26
 258 #define PGM_LSX_TRANSLATION             0x27
 259 #define PGM_ALET_SPECIFICATION          0x28
 260 #define PGM_ALEN_TRANSLATION            0x29
 261 #define PGM_ALE_SEQUENCE                0x2a
 262 #define PGM_ASTE_VALIDITY               0x2b
 263 #define PGM_ASTE_SEQUENCE               0x2c
 264 #define PGM_EXTENDED_AUTHORITY          0x2d
 265 #define PGM_LSTE_SEQUENCE               0x2e
 266 #define PGM_ASTE_INSTANCE               0x2f
 267 #define PGM_STACK_FULL                  0x30
 268 #define PGM_STACK_EMPTY                 0x31
 269 #define PGM_STACK_SPECIFICATION         0x32
 270 #define PGM_STACK_TYPE                  0x33
 271 #define PGM_STACK_OPERATION             0x34
 272 #define PGM_ASCE_TYPE                   0x38
 273 #define PGM_REGION_FIRST_TRANS          0x39
 274 #define PGM_REGION_SECOND_TRANS         0x3a
 275 #define PGM_REGION_THIRD_TRANS          0x3b
 276 #define PGM_MONITOR                     0x40
 277 #define PGM_PER                         0x80
 278 #define PGM_CRYPTO_OPERATION            0x119
 279
 280 struct kvm_s390_interrupt_info {
 281         struct list_head list;
 282         u64     type;
 283         union {
 284                 struct kvm_s390_io_info io;
 285                 struct kvm_s390_ext_info ext;
 286                 struct kvm_s390_pgm_info pgm;
 287                 struct kvm_s390_emerg_info emerg;
 288                 struct kvm_s390_extcall_info extcall;
 289                 struct kvm_s390_prefix_info prefix;
 290                 struct kvm_s390_mchk_info mchk;
 291         };
 292 };
 293
 294 /* for local_interrupt.action_flags */
 295 #define ACTION_STORE_ON_STOP            (1<<0)
 296 #define ACTION_STOP_ON_STOP             (1<<1)
 297
 298 struct kvm_s390_local_interrupt {
 299         spinlock_t lock;
 300         struct list_head list;
 301         atomic_t active;
 302         struct kvm_s390_float_interrupt *float_int;
 303         int timer_due; /* event indicator for waitqueue below */
 304         wait_queue_head_t *wq;
 305         atomic_t *cpuflags;
 306         unsigned int action_bits;
 307 };
 308
 309 struct kvm_s390_float_interrupt {
 310         spinlock_t lock;
 311         struct list_head list;
 312         atomic_t active;
 313         int next_rr_cpu;
 314         unsigned long idle_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
 315         unsigned int irq_count;
 316 };
 317
 318 struct kvm_hw_wp_info_arch {
 319         unsigned long addr;
 320         unsigned long phys_addr;
 321         int len;
 322         char *old_data;
 323 };
 324
 325 struct kvm_hw_bp_info_arch {
 326         unsigned long addr;
 327         int len;
 328 };
 329
 330 /*
 331  * Only the upper 16 bits of kvm_guest_debug->control are arch specific.
 332  * Further KVM_GUESTDBG flags which an be used from userspace can be found in
 333  * arch/s390/include/uapi/asm/kvm.h
 334  */
 335 #define KVM_GUESTDBG_EXIT_PENDING 0x10000000
 336
 337 #define guestdbg_enabled(vcpu) \
 338                 (vcpu->guest_debug & KVM_GUESTDBG_ENABLE)
 339 #define guestdbg_sstep_enabled(vcpu) \
 340                 (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
 341 #define guestdbg_hw_bp_enabled(vcpu) \
 342                 (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
 343 #define guestdbg_exit_pending(vcpu) (guestdbg_enabled(vcpu) && \
 344                 (vcpu->guest_debug & KVM_GUESTDBG_EXIT_PENDING))
 345
 346 struct kvm_guestdbg_info_arch {
 347         unsigned long cr0;
 348         unsigned long cr9;
 349         unsigned long cr10;
 350         unsigned long cr11;
 351         struct kvm_hw_bp_info_arch *hw_bp_info;
 352         struct kvm_hw_wp_info_arch *hw_wp_info;
 353         int nr_hw_bp;
 354         int nr_hw_wp;
 355         unsigned long last_bp;
 356 };
 357
 358 struct kvm_vcpu_arch {
 359         struct kvm_s390_sie_block *sie_block;
 360         s390_fp_regs      host_fpregs;
 361         unsigned int      host_acrs[NUM_ACRS];
 362         s390_fp_regs      guest_fpregs;
 363         struct kvm_s390_local_interrupt local_int;
 364         struct hrtimer    ckc_timer;
 365         struct tasklet_struct tasklet;
 366         struct kvm_s390_pgm_info pgm;
 367         union  {
 368                 struct cpuid    cpu_id;
 369                 u64             stidp_data;
 370         };
 371         struct gmap *gmap;
 372         struct kvm_guestdbg_info_arch guestdbg;
 373 #define KVM_S390_PFAULT_TOKEN_INVALID   (-1UL)
 374         unsigned long pfault_token;
 375         unsigned long pfault_select;
 376         unsigned long pfault_compare;
 377 };
 378
 379 struct kvm_vm_stat {
 380         u32 remote_tlb_flush;
 381 };
 382
 383 struct kvm_arch_memory_slot {
 384 };
 385
 386 struct s390_map_info {
 387         struct list_head list;
 388         __u64 guest_addr;
 389         __u64 addr;
 390         struct page *page;
 391 };
 392
 393 struct s390_io_adapter {
 394         unsigned int id;
 395         int isc;
 396         bool maskable;
 397         bool masked;
 398         bool swap;
 399         struct rw_semaphore maps_lock;
 400         struct list_head maps;
 401         atomic_t nr_maps;
 402 };
 403
 404 #define MAX_S390_IO_ADAPTERS ((MAX_ISC + 1) * 8)
 405 #define MAX_S390_ADAPTER_MAPS 256
 406
 407 struct kvm_arch{
 408         struct sca_block *sca;
 409         debug_info_t *dbf;
 410         struct kvm_s390_float_interrupt float_int;
 411         struct kvm_device *flic;
 412         struct gmap *gmap;
 413         int css_support;
 414         int use_irqchip;
 415         int use_cmma;
 416         struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS];
 417         wait_queue_head_t ipte_wq;
 418         spinlock_t start_stop_lock;
 419 };
 420
 421 #define KVM_HVA_ERR_BAD         (-1UL)
 422 #define KVM_HVA_ERR_RO_BAD      (-2UL)
 423
 424 static inline bool kvm_is_error_hva(unsigned long addr)
 425 {
 426         return IS_ERR_VALUE(addr);
 427 }
 428
 429 #define ASYNC_PF_PER_VCPU       64
 430 struct kvm_vcpu;
 431 struct kvm_async_pf;
 432 struct kvm_arch_async_pf {
 433         unsigned long pfault_token;
 434 };
 435
 436 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
 437
 438 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
 439                                struct kvm_async_pf *work);
 440
 441 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
 442                                      struct kvm_async_pf *work);
 443
 444 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
 445                                  struct kvm_async_pf *work);
 446
 447 extern int sie64a(struct kvm_s390_sie_block *, u64 *);
 448 extern char sie_exit;
 449 #endif