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 <asm/debug.h>
  23 #include <asm/cpu.h>
  24
  25 #define KVM_MAX_VCPUS 64
  26 #define KVM_USER_MEM_SLOTS 32
  27
  28 struct sca_entry {
  29         atomic_t scn;
  30         __u32   reserved;
  31         __u64   sda;
  32         __u64   reserved2[2];
  33 } __attribute__((packed));
  34
  35
  36 struct sca_block {
  37         __u64   ipte_control;
  38         __u64   reserved[5];
  39         __u64   mcn;
  40         __u64   reserved2;
  41         struct sca_entry cpu[64];
  42 } __attribute__((packed));
  43
  44 #define KVM_NR_PAGE_SIZES 2
  45 #define KVM_HPAGE_GFN_SHIFT(x) (((x) - 1) * 8)
  46 #define KVM_HPAGE_SHIFT(x) (PAGE_SHIFT + KVM_HPAGE_GFN_SHIFT(x))
  47 #define KVM_HPAGE_SIZE(x) (1UL << KVM_HPAGE_SHIFT(x))
  48 #define KVM_HPAGE_MASK(x)       (~(KVM_HPAGE_SIZE(x) - 1))
  49 #define KVM_PAGES_PER_HPAGE(x)  (KVM_HPAGE_SIZE(x) / PAGE_SIZE)
  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_J          0x00000002
  69 #define CPUSTAT_P          0x00000001
  70
  71 struct kvm_s390_sie_block {
  72         atomic_t cpuflags;              /* 0x0000 */
  73         __u32   prefix;                 /* 0x0004 */
  74         __u8    reserved8[32];          /* 0x0008 */
  75         __u64   cputm;                  /* 0x0028 */
  76         __u64   ckc;                    /* 0x0030 */
  77         __u64   epoch;                  /* 0x0038 */
  78         __u8    reserved40[4];          /* 0x0040 */
  79 #define LCTL_CR0        0x8000
  80 #define LCTL_CR6        0x0200
  81 #define LCTL_CR14       0x0002
  82         __u16   lctl;                   /* 0x0044 */
  83         __s16   icpua;                  /* 0x0046 */
  84 #define ICTL_LPSW 0x00400000
  85         __u32   ictl;                   /* 0x0048 */
  86         __u32   eca;                    /* 0x004c */
  87         __u8    icptcode;               /* 0x0050 */
  88         __u8    reserved51;             /* 0x0051 */
  89         __u16   ihcpu;                  /* 0x0052 */
  90         __u8    reserved54[2];          /* 0x0054 */
  91         __u16   ipa;                    /* 0x0056 */
  92         __u32   ipb;                    /* 0x0058 */
  93         __u32   scaoh;                  /* 0x005c */
  94         __u8    reserved60;             /* 0x0060 */
  95         __u8    ecb;                    /* 0x0061 */
  96         __u8    reserved62[2];          /* 0x0062 */
  97         __u32   scaol;                  /* 0x0064 */
  98         __u8    reserved68[4];          /* 0x0068 */
  99         __u32   todpr;                  /* 0x006c */
 100         __u8    reserved70[32];         /* 0x0070 */
 101         psw_t   gpsw;                   /* 0x0090 */
 102         __u64   gg14;                   /* 0x00a0 */
 103         __u64   gg15;                   /* 0x00a8 */
 104         __u8    reservedb0[30];         /* 0x00b0 */
 105         __u16   iprcc;                  /* 0x00ce */
 106         __u8    reservedd0[48];         /* 0x00d0 */
 107         __u64   gcr[16];                /* 0x0100 */
 108         __u64   gbea;                   /* 0x0180 */
 109         __u8    reserved188[24];        /* 0x0188 */
 110         __u32   fac;                    /* 0x01a0 */
 111         __u8    reserved1a4[92];        /* 0x01a4 */
 112 } __attribute__((packed));
 113
 114 struct kvm_vcpu_stat {
 115         u32 exit_userspace;
 116         u32 exit_null;
 117         u32 exit_external_request;
 118         u32 exit_external_interrupt;
 119         u32 exit_stop_request;
 120         u32 exit_validity;
 121         u32 exit_instruction;
 122         u32 instruction_lctl;
 123         u32 instruction_lctlg;
 124         u32 exit_program_interruption;
 125         u32 exit_instr_and_program;
 126         u32 deliver_external_call;
 127         u32 deliver_emergency_signal;
 128         u32 deliver_service_signal;
 129         u32 deliver_virtio_interrupt;
 130         u32 deliver_stop_signal;
 131         u32 deliver_prefix_signal;
 132         u32 deliver_restart_signal;
 133         u32 deliver_program_int;
 134         u32 deliver_io_int;
 135         u32 exit_wait_state;
 136         u32 instruction_stidp;
 137         u32 instruction_spx;
 138         u32 instruction_stpx;
 139         u32 instruction_stap;
 140         u32 instruction_storage_key;
 141         u32 instruction_stsch;
 142         u32 instruction_chsc;
 143         u32 instruction_stsi;
 144         u32 instruction_stfl;
 145         u32 instruction_tprot;
 146         u32 instruction_sigp_sense;
 147         u32 instruction_sigp_sense_running;
 148         u32 instruction_sigp_external_call;
 149         u32 instruction_sigp_emergency;
 150         u32 instruction_sigp_stop;
 151         u32 instruction_sigp_arch;
 152         u32 instruction_sigp_prefix;
 153         u32 instruction_sigp_restart;
 154         u32 diagnose_10;
 155         u32 diagnose_44;
 156         u32 diagnose_9c;
 157 };
 158
 159 struct kvm_s390_io_info {
 160         __u16        subchannel_id;            /* 0x0b8 */
 161         __u16        subchannel_nr;            /* 0x0ba */
 162         __u32        io_int_parm;              /* 0x0bc */
 163         __u32        io_int_word;              /* 0x0c0 */
 164 };
 165
 166 struct kvm_s390_ext_info {
 167         __u32 ext_params;
 168         __u64 ext_params2;
 169 };
 170
 171 #define PGM_OPERATION            0x01
 172 #define PGM_PRIVILEGED_OPERATION 0x02
 173 #define PGM_EXECUTE              0x03
 174 #define PGM_PROTECTION           0x04
 175 #define PGM_ADDRESSING           0x05
 176 #define PGM_SPECIFICATION        0x06
 177 #define PGM_DATA                 0x07
 178
 179 struct kvm_s390_pgm_info {
 180         __u16 code;
 181 };
 182
 183 struct kvm_s390_prefix_info {
 184         __u32 address;
 185 };
 186
 187 struct kvm_s390_extcall_info {
 188         __u16 code;
 189 };
 190
 191 struct kvm_s390_emerg_info {
 192         __u16 code;
 193 };
 194
 195 struct kvm_s390_mchk_info {
 196         __u64 cr14;
 197         __u64 mcic;
 198 };
 199
 200 struct kvm_s390_interrupt_info {
 201         struct list_head list;
 202         u64     type;
 203         union {
 204                 struct kvm_s390_io_info io;
 205                 struct kvm_s390_ext_info ext;
 206                 struct kvm_s390_pgm_info pgm;
 207                 struct kvm_s390_emerg_info emerg;
 208                 struct kvm_s390_extcall_info extcall;
 209                 struct kvm_s390_prefix_info prefix;
 210                 struct kvm_s390_mchk_info mchk;
 211         };
 212 };
 213
 214 /* for local_interrupt.action_flags */
 215 #define ACTION_STORE_ON_STOP            (1<<0)
 216 #define ACTION_STOP_ON_STOP             (1<<1)
 217 #define ACTION_RELOADVCPU_ON_STOP       (1<<2)
 218
 219 struct kvm_s390_local_interrupt {
 220         spinlock_t lock;
 221         struct list_head list;
 222         atomic_t active;
 223         struct kvm_s390_float_interrupt *float_int;
 224         int timer_due; /* event indicator for waitqueue below */
 225         wait_queue_head_t wq;
 226         atomic_t *cpuflags;
 227         unsigned int action_bits;
 228 };
 229
 230 struct kvm_s390_float_interrupt {
 231         spinlock_t lock;
 232         struct list_head list;
 233         atomic_t active;
 234         int next_rr_cpu;
 235         unsigned long idle_mask[(KVM_MAX_VCPUS + sizeof(long) - 1)
 236                                 / sizeof(long)];
 237         struct kvm_s390_local_interrupt *local_int[KVM_MAX_VCPUS];
 238 };
 239
 240
 241 struct kvm_vcpu_arch {
 242         struct kvm_s390_sie_block *sie_block;
 243         s390_fp_regs      host_fpregs;
 244         unsigned int      host_acrs[NUM_ACRS];
 245         s390_fp_regs      guest_fpregs;
 246         struct kvm_s390_local_interrupt local_int;
 247         struct hrtimer    ckc_timer;
 248         struct tasklet_struct tasklet;
 249         union  {
 250                 struct cpuid    cpu_id;
 251                 u64             stidp_data;
 252         };
 253         struct gmap *gmap;
 254 };
 255
 256 struct kvm_vm_stat {
 257         u32 remote_tlb_flush;
 258 };
 259
 260 struct kvm_arch_memory_slot {
 261 };
 262
 263 struct kvm_arch{
 264         struct sca_block *sca;
 265         debug_info_t *dbf;
 266         struct kvm_s390_float_interrupt float_int;
 267         struct gmap *gmap;
 268         int css_support;
 269 };
 270
 271 extern int sie64a(struct kvm_s390_sie_block *, u64 *);
 272
 273 static inline void kvm_arch_hardware_disable(void *garbage) {}
 274 static inline void kvm_arch_check_processor_compat(void *rtn) {}
 275 static inline void kvm_arch_exit(void) {}
 276 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
 277 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
 278 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
 279 static inline void kvm_arch_free_memslot(struct kvm *kvm,
 280                 struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
 281 static inline void kvm_arch_memslots_updated(struct kvm *kvm) {}
 282 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
 283 static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
 284                 struct kvm_memory_slot *slot) {}
 285
 286 #endif