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 <asm/debug.h>
  20 #include <asm/cpu.h>
  21
  22 #define KVM_MAX_VCPUS 64
  23 #define KVM_USER_MEM_SLOTS 32
  24
  25 struct sca_entry {
  26         atomic_t scn;
  27         __u32   reserved;
  28         __u64   sda;
  29         __u64   reserved2[2];
  30 } __attribute__((packed));
  31
  32
  33 struct sca_block {
  34         __u64   ipte_control;
  35         __u64   reserved[5];
  36         __u64   mcn;
  37         __u64   reserved2;
  38         struct sca_entry cpu[64];
  39 } __attribute__((packed));
  40
  41 #define KVM_NR_PAGE_SIZES 2
  42 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 8)
  43 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x))
  44 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x))
  45 #define KVM_HPAGE_MASK(x)       (~(KVM_HPAGE_SIZE(x) - 1))
  46 #define KVM_PAGES_PER_HPAGE(x)  (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
  47
  48 #define CPUSTAT_STOPPED    0x80000000
  49 #define CPUSTAT_WAIT       0x10000000
  50 #define CPUSTAT_ECALL_PEND 0x08000000
  51 #define CPUSTAT_STOP_INT   0x04000000
  52 #define CPUSTAT_IO_INT     0x02000000
  53 #define CPUSTAT_EXT_INT    0x01000000
  54 #define CPUSTAT_RUNNING    0x00800000
  55 #define CPUSTAT_RETAINED   0x00400000
  56 #define CPUSTAT_TIMING_SUB 0x00020000
  57 #define CPUSTAT_SIE_SUB    0x00010000
  58 #define CPUSTAT_RRF        0x00008000
  59 #define CPUSTAT_SLSV       0x00004000
  60 #define CPUSTAT_SLSR       0x00002000
  61 #define CPUSTAT_ZARCH      0x00000800
  62 #define CPUSTAT_MCDS       0x00000100
  63 #define CPUSTAT_SM         0x00000080
  64 #define CPUSTAT_G          0x00000008
  65 #define CPUSTAT_GED        0x00000004
  66 #define CPUSTAT_J          0x00000002
  67 #define CPUSTAT_P          0x00000001
  68
  69 struct kvm_s390_sie_block {
  70         atomic_t cpuflags;              /* 0x0000 */
  71         __u32   prefix;                 /* 0x0004 */
  72         __u8    reserved08[4];          /* 0x0008 */
  73 #define PROG_IN_SIE (1<<0)
  74         __u32   prog0c;                 /* 0x000c */
  75         __u8    reserved10[16];         /* 0x0010 */
  76 #define PROG_BLOCK_SIE 0x00000001
  77         atomic_t prog20;                /* 0x0020 */
  78         __u8    reserved24[4];          /* 0x0024 */
  79         __u64   cputm;                  /* 0x0028 */
  80         __u64   ckc;                    /* 0x0030 */
  81         __u64   epoch;                  /* 0x0038 */
  82         __u8    reserved40[4];          /* 0x0040 */
  83 #define LCTL_CR0        0x8000
  84 #define LCTL_CR6        0x0200
  85 #define LCTL_CR14       0x0002
  86         __u16   lctl;                   /* 0x0044 */
  87         __s16   icpua;                  /* 0x0046 */
  88 #define ICTL_LPSW 0x00400000
  89         __u32   ictl;                   /* 0x0048 */
  90         __u32   eca;                    /* 0x004c */
  91         __u8    icptcode;               /* 0x0050 */
  92         __u8    reserved51;             /* 0x0051 */
  93         __u16   ihcpu;                  /* 0x0052 */
  94         __u8    reserved54[2];          /* 0x0054 */
  95         __u16   ipa;                    /* 0x0056 */
  96         __u32   ipb;                    /* 0x0058 */
  97         __u32   scaoh;                  /* 0x005c */
  98         __u8    reserved60;             /* 0x0060 */
  99         __u8    ecb;                    /* 0x0061 */
 100         __u8    ecb2;                   /* 0x0062 */
 101         __u8    reserved63[1];          /* 0x0063 */
 102         __u32   scaol;                  /* 0x0064 */
 103         __u8    reserved68[4];          /* 0x0068 */
 104         __u32   todpr;                  /* 0x006c */
 105         __u8    reserved70[32];         /* 0x0070 */
 106         psw_t   gpsw;                   /* 0x0090 */
 107         __u64   gg14;                   /* 0x00a0 */
 108         __u64   gg15;                   /* 0x00a8 */
 109         __u8    reservedb0[30];         /* 0x00b0 */
 110         __u16   iprcc;                  /* 0x00ce */
 111         __u8    reservedd0[48];         /* 0x00d0 */
 112         __u64   gcr[16];                /* 0x0100 */
 113         __u64   gbea;                   /* 0x0180 */
 114         __u8    reserved188[24];        /* 0x0188 */
 115         __u32   fac;                    /* 0x01a0 */
 116         __u8    reserved1a4[92];        /* 0x01a4 */
 117 } __attribute__((packed));
 118
 119 struct kvm_vcpu_stat {
 120         u32 exit_userspace;
 121         u32 exit_null;
 122         u32 exit_external_request;
 123         u32 exit_external_interrupt;
 124         u32 exit_stop_request;
 125         u32 exit_validity;
 126         u32 exit_instruction;
 127         u32 instruction_lctl;
 128         u32 instruction_lctlg;
 129         u32 exit_program_interruption;
 130         u32 exit_instr_and_program;
 131         u32 deliver_external_call;
 132         u32 deliver_emergency_signal;
 133         u32 deliver_service_signal;
 134         u32 deliver_virtio_interrupt;
 135         u32 deliver_stop_signal;
 136         u32 deliver_prefix_signal;
 137         u32 deliver_restart_signal;
 138         u32 deliver_program_int;
 139         u32 deliver_io_int;
 140         u32 exit_wait_state;
 141         u32 instruction_pfmf;
 142         u32 instruction_stidp;
 143         u32 instruction_spx;
 144         u32 instruction_stpx;
 145         u32 instruction_stap;
 146         u32 instruction_storage_key;
 147         u32 instruction_stsch;
 148         u32 instruction_chsc;
 149         u32 instruction_stsi;
 150         u32 instruction_stfl;
 151         u32 instruction_tprot;
 152         u32 instruction_sigp_sense;
 153         u32 instruction_sigp_sense_running;
 154         u32 instruction_sigp_external_call;
 155         u32 instruction_sigp_emergency;
 156         u32 instruction_sigp_stop;
 157         u32 instruction_sigp_arch;
 158         u32 instruction_sigp_prefix;
 159         u32 instruction_sigp_restart;
 160         u32 diagnose_10;
 161         u32 diagnose_44;
 162         u32 diagnose_9c;
 163 };
 164
 165 struct kvm_s390_io_info {
 166         __u16        subchannel_id;            /* 0x0b8 */
 167         __u16        subchannel_nr;            /* 0x0ba */
 168         __u32        io_int_parm;              /* 0x0bc */
 169         __u32        io_int_word;              /* 0x0c0 */
 170 };
 171
 172 struct kvm_s390_ext_info {
 173         __u32 ext_params;
 174         __u64 ext_params2;
 175 };
 176
 177 #define PGM_OPERATION            0x01
 178 #define PGM_PRIVILEGED_OP        0x02
 179 #define PGM_EXECUTE              0x03
 180 #define PGM_PROTECTION           0x04
 181 #define PGM_ADDRESSING           0x05
 182 #define PGM_SPECIFICATION        0x06
 183 #define PGM_DATA                 0x07
 184
 185 struct kvm_s390_pgm_info {
 186         __u16 code;
 187 };
 188
 189 struct kvm_s390_prefix_info {
 190         __u32 address;
 191 };
 192
 193 struct kvm_s390_extcall_info {
 194         __u16 code;
 195 };
 196
 197 struct kvm_s390_emerg_info {
 198         __u16 code;
 199 };
 200
 201 struct kvm_s390_mchk_info {
 202         __u64 cr14;
 203         __u64 mcic;
 204 };
 205
 206 struct kvm_s390_interrupt_info {
 207         struct list_head list;
 208         u64     type;
 209         union {
 210                 struct kvm_s390_io_info io;
 211                 struct kvm_s390_ext_info ext;
 212                 struct kvm_s390_pgm_info pgm;
 213                 struct kvm_s390_emerg_info emerg;
 214                 struct kvm_s390_extcall_info extcall;
 215                 struct kvm_s390_prefix_info prefix;
 216                 struct kvm_s390_mchk_info mchk;
 217         };
 218 };
 219
 220 /* for local_interrupt.action_flags */
 221 #define ACTION_STORE_ON_STOP            (1<<0)
 222 #define ACTION_STOP_ON_STOP             (1<<1)
 223 #define ACTION_RELOADVCPU_ON_STOP       (1<<2)
 224
 225 struct kvm_s390_local_interrupt {
 226         spinlock_t lock;
 227         struct list_head list;
 228         atomic_t active;
 229         struct kvm_s390_float_interrupt *float_int;
 230         int timer_due; /* event indicator for waitqueue below */
 231         wait_queue_head_t *wq;
 232         atomic_t *cpuflags;
 233         unsigned int action_bits;
 234 };
 235
 236 struct kvm_s390_float_interrupt {
 237         spinlock_t lock;
 238         struct list_head list;
 239         atomic_t active;
 240         int next_rr_cpu;
 241         unsigned long idle_mask[(KVM_MAX_VCPUS + sizeof(long) - 1)
 242                                 / sizeof(long)];
 243         struct kvm_s390_local_interrupt *local_int[KVM_MAX_VCPUS];
 244 };
 245
 246
 247 struct kvm_vcpu_arch {
 248         struct kvm_s390_sie_block *sie_block;
 249         s390_fp_regs      host_fpregs;
 250         unsigned int      host_acrs[NUM_ACRS];
 251         s390_fp_regs      guest_fpregs;
 252         struct kvm_s390_local_interrupt local_int;
 253         struct hrtimer    ckc_timer;
 254         struct tasklet_struct tasklet;
 255         union  {
 256                 struct cpuid    cpu_id;
 257                 u64             stidp_data;
 258         };
 259         struct gmap *gmap;
 260 };
 261
 262 struct kvm_vm_stat {
 263         u32 remote_tlb_flush;
 264 };
 265
 266 struct kvm_arch_memory_slot {
 267 };
 268
 269 struct kvm_arch{
 270         struct sca_block *sca;
 271         debug_info_t *dbf;
 272         struct kvm_s390_float_interrupt float_int;
 273         struct gmap *gmap;
 274         int css_support;
 275 };
 276
 277 #define KVM_HVA_ERR_BAD         (-1UL)
 278 #define KVM_HVA_ERR_RO_BAD      (-2UL)
 279
 280 static inline bool kvm_is_error_hva(unsigned long addr)
 281 {
 282         return IS_ERR_VALUE(addr);
 283 }
 284
 285 extern int sie64a(struct kvm_s390_sie_block *, u64 *);
 286 extern char sie_exit;
 287 #endif