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 <[email protected]>
  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
  43 struct sca_block {
  44         __u64   ipte_control;
  45         __u64   reserved[5];
  46         __u64   mcn;
  47         __u64   reserved2;
  48         struct sca_entry cpu[64];
  49 } __attribute__((packed));
  50
  51 #define CPUSTAT_STOPPED    0x80000000
  52 #define CPUSTAT_WAIT       0x10000000
  53 #define CPUSTAT_ECALL_PEND 0x08000000
  54 #define CPUSTAT_STOP_INT   0x04000000
  55 #define CPUSTAT_IO_INT     0x02000000
  56 #define CPUSTAT_EXT_INT    0x01000000
  57 #define CPUSTAT_RUNNING    0x00800000
  58 #define CPUSTAT_RETAINED   0x00400000
  59 #define CPUSTAT_TIMING_SUB 0x00020000
  60 #define CPUSTAT_SIE_SUB    0x00010000
  61 #define CPUSTAT_RRF        0x00008000
  62 #define CPUSTAT_SLSV       0x00004000
  63 #define CPUSTAT_SLSR       0x00002000
  64 #define CPUSTAT_ZARCH      0x00000800
  65 #define CPUSTAT_MCDS       0x00000100
  66 #define CPUSTAT_SM         0x00000080
  67 #define CPUSTAT_G          0x00000008
  68 #define CPUSTAT_GED        0x00000004
  69 #define CPUSTAT_J          0x00000002
  70 #define CPUSTAT_P          0x00000001
  71
  72 struct kvm_s390_sie_block {
  73         atomic_t cpuflags;              /* 0x0000 */
  74         __u32   prefix;                 /* 0x0004 */
  75         __u8    reserved08[4];          /* 0x0008 */
  76 #define PROG_IN_SIE (1<<0)
  77         __u32   prog0c;                 /* 0x000c */
  78         __u8    reserved10[16];         /* 0x0010 */
  79 #define PROG_BLOCK_SIE 0x00000001
  80         atomic_t prog20;                /* 0x0020 */
  81         __u8    reserved24[4];          /* 0x0024 */
  82         __u64   cputm;                  /* 0x0028 */
  83         __u64   ckc;                    /* 0x0030 */
  84         __u64   epoch;                  /* 0x0038 */
  85         __u8    reserved40[4];          /* 0x0040 */
  86 #define LCTL_CR0        0x8000
  87 #define LCTL_CR6        0x0200
  88 #define LCTL_CR14       0x0002
  89         __u16   lctl;                   /* 0x0044 */
  90         __s16   icpua;                  /* 0x0046 */
  91 #define ICTL_LPSW 0x00400000
  92         __u32   ictl;                   /* 0x0048 */
  93         __u32   eca;                    /* 0x004c */
  94         __u8    icptcode;               /* 0x0050 */
  95         __u8    reserved51;             /* 0x0051 */
  96         __u16   ihcpu;                  /* 0x0052 */
  97         __u8    reserved54[2];          /* 0x0054 */
  98         __u16   ipa;                    /* 0x0056 */
  99         __u32   ipb;                    /* 0x0058 */
 100         __u32   scaoh;                  /* 0x005c */
 101         __u8    reserved60;             /* 0x0060 */
 102         __u8    ecb;                    /* 0x0061 */
 103         __u8    ecb2;                   /* 0x0062 */
 104         __u8    reserved63[1];          /* 0x0063 */
 105         __u32   scaol;                  /* 0x0064 */
 106         __u8    reserved68[4];          /* 0x0068 */
 107         __u32   todpr;                  /* 0x006c */
 108         __u8    reserved70[32];         /* 0x0070 */
 109         psw_t   gpsw;                   /* 0x0090 */
 110         __u64   gg14;                   /* 0x00a0 */
 111         __u64   gg15;                   /* 0x00a8 */
 112         __u8    reservedb0[30];         /* 0x00b0 */
 113         __u16   iprcc;                  /* 0x00ce */
 114         __u8    reservedd0[48];         /* 0x00d0 */
 115         __u64   gcr[16];                /* 0x0100 */
 116         __u64   gbea;                   /* 0x0180 */
 117         __u8    reserved188[24];        /* 0x0188 */
 118         __u32   fac;                    /* 0x01a0 */
 119         __u8    reserved1a4[20];        /* 0x01a4 */
 120         __u64   cbrlo;                  /* 0x01b8 */
 121         __u8    reserved1c0[30];        /* 0x01c0 */
 122         __u64   pp;                     /* 0x01de */
 123         __u8    reserved1e6[2];         /* 0x01e6 */
 124         __u64   itdba;                  /* 0x01e8 */
 125         __u8    reserved1f0[16];        /* 0x01f0 */
 126 } __attribute__((packed));
 127
 128 struct kvm_s390_itdb {
 129         __u8    data[256];
 130 } __packed;
 131
 132 struct sie_page {
 133         struct kvm_s390_sie_block sie_block;
 134         __u8 reserved200[1024];         /* 0x0200 */
 135         struct kvm_s390_itdb itdb;      /* 0x0600 */
 136         __u8 reserved700[2304];         /* 0x0700 */
 137 } __packed;
 138
 139 struct kvm_vcpu_stat {
 140         u32 exit_userspace;
 141         u32 exit_null;
 142         u32 exit_external_request;
 143         u32 exit_external_interrupt;
 144         u32 exit_stop_request;
 145         u32 exit_validity;
 146         u32 exit_instruction;
 147         u32 instruction_lctl;
 148         u32 instruction_lctlg;
 149         u32 exit_program_interruption;
 150         u32 exit_instr_and_program;
 151         u32 deliver_external_call;
 152         u32 deliver_emergency_signal;
 153         u32 deliver_service_signal;
 154         u32 deliver_virtio_interrupt;
 155         u32 deliver_stop_signal;
 156         u32 deliver_prefix_signal;
 157         u32 deliver_restart_signal;
 158         u32 deliver_program_int;
 159         u32 deliver_io_int;
 160         u32 exit_wait_state;
 161         u32 instruction_pfmf;
 162         u32 instruction_stidp;
 163         u32 instruction_spx;
 164         u32 instruction_stpx;
 165         u32 instruction_stap;
 166         u32 instruction_storage_key;
 167         u32 instruction_stsch;
 168         u32 instruction_chsc;
 169         u32 instruction_stsi;
 170         u32 instruction_stfl;
 171         u32 instruction_tprot;
 172         u32 instruction_essa;
 173         u32 instruction_sigp_sense;
 174         u32 instruction_sigp_sense_running;
 175         u32 instruction_sigp_external_call;
 176         u32 instruction_sigp_emergency;
 177         u32 instruction_sigp_stop;
 178         u32 instruction_sigp_arch;
 179         u32 instruction_sigp_prefix;
 180         u32 instruction_sigp_restart;
 181         u32 diagnose_10;
 182         u32 diagnose_44;
 183         u32 diagnose_9c;
 184 };
 185
 186 #define PGM_OPERATION            0x01
 187 #define PGM_PRIVILEGED_OP        0x02
 188 #define PGM_EXECUTE              0x03
 189 #define PGM_PROTECTION           0x04
 190 #define PGM_ADDRESSING           0x05
 191 #define PGM_SPECIFICATION        0x06
 192 #define PGM_DATA                 0x07
 193
 194 struct kvm_s390_interrupt_info {
 195         struct list_head list;
 196         u64     type;
 197         union {
 198                 struct kvm_s390_io_info io;
 199                 struct kvm_s390_ext_info ext;
 200                 struct kvm_s390_pgm_info pgm;
 201                 struct kvm_s390_emerg_info emerg;
 202                 struct kvm_s390_extcall_info extcall;
 203                 struct kvm_s390_prefix_info prefix;
 204                 struct kvm_s390_mchk_info mchk;
 205         };
 206 };
 207
 208 /* for local_interrupt.action_flags */
 209 #define ACTION_STORE_ON_STOP            (1<<0)
 210 #define ACTION_STOP_ON_STOP             (1<<1)
 211
 212 struct kvm_s390_local_interrupt {
 213         spinlock_t lock;
 214         struct list_head list;
 215         atomic_t active;
 216         struct kvm_s390_float_interrupt *float_int;
 217         int timer_due; /* event indicator for waitqueue below */
 218         wait_queue_head_t *wq;
 219         atomic_t *cpuflags;
 220         unsigned int action_bits;
 221 };
 222
 223 struct kvm_s390_float_interrupt {
 224         spinlock_t lock;
 225         struct list_head list;
 226         atomic_t active;
 227         int next_rr_cpu;
 228         unsigned long idle_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
 229         unsigned int irq_count;
 230 };
 231
 232
 233 struct kvm_vcpu_arch {
 234         struct kvm_s390_sie_block *sie_block;
 235         s390_fp_regs      host_fpregs;
 236         unsigned int      host_acrs[NUM_ACRS];
 237         s390_fp_regs      guest_fpregs;
 238         struct kvm_s390_local_interrupt local_int;
 239         struct hrtimer    ckc_timer;
 240         struct tasklet_struct tasklet;
 241         union  {
 242                 struct cpuid    cpu_id;
 243                 u64             stidp_data;
 244         };
 245         struct gmap *gmap;
 246 #define KVM_S390_PFAULT_TOKEN_INVALID   (-1UL)
 247         unsigned long pfault_token;
 248         unsigned long pfault_select;
 249         unsigned long pfault_compare;
 250 };
 251
 252 struct kvm_vm_stat {
 253         u32 remote_tlb_flush;
 254 };
 255
 256 struct kvm_arch_memory_slot {
 257 };
 258
 259 struct s390_map_info {
 260         struct list_head list;
 261         __u64 guest_addr;
 262         __u64 addr;
 263         struct page *page;
 264 };
 265
 266 struct s390_io_adapter {
 267         unsigned int id;
 268         int isc;
 269         bool maskable;
 270         bool masked;
 271         bool swap;
 272         struct rw_semaphore maps_lock;
 273         struct list_head maps;
 274         atomic_t nr_maps;
 275 };
 276
 277 #define MAX_S390_IO_ADAPTERS ((MAX_ISC + 1) * 8)
 278 #define MAX_S390_ADAPTER_MAPS 256
 279
 280 struct kvm_arch{
 281         struct sca_block *sca;
 282         debug_info_t *dbf;
 283         struct kvm_s390_float_interrupt float_int;
 284         struct kvm_device *flic;
 285         struct gmap *gmap;
 286         int css_support;
 287         int use_irqchip;
 288         struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS];
 289 };
 290
 291 #define KVM_HVA_ERR_BAD         (-1UL)
 292 #define KVM_HVA_ERR_RO_BAD      (-2UL)
 293
 294 static inline bool kvm_is_error_hva(unsigned long addr)
 295 {
 296         return IS_ERR_VALUE(addr);
 297 }
 298
 299 #define ASYNC_PF_PER_VCPU       64
 300 struct kvm_vcpu;
 301 struct kvm_async_pf;
 302 struct kvm_arch_async_pf {
 303         unsigned long pfault_token;
 304 };
 305
 306 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
 307
 308 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
 309                                struct kvm_async_pf *work);
 310
 311 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
 312                                      struct kvm_async_pf *work);
 313
 314 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
 315                                  struct kvm_async_pf *work);
 316
 317 extern int sie64a(struct kvm_s390_sie_block *, u64 *);
 318 extern char sie_exit;
 319 #endif