arch/s390/kvm/kvm-s390.h

   1 /*
   2  * definition for kvm 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  *               Christian Borntraeger <borntraeger@de.ibm.com>
  12  *               Christian Ehrhardt <ehrhardt@de.ibm.com>
  13  */
  14
  15 #ifndef ARCH_S390_KVM_S390_H
  16 #define ARCH_S390_KVM_S390_H
  17
  18 #include <linux/hrtimer.h>
  19 #include <linux/kvm.h>
  20 #include <linux/kvm_host.h>
  21 #include <asm/facility.h>
  22
  23 typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
  24
  25 /* Transactional Memory Execution related macros */
  26 #define IS_TE_ENABLED(vcpu)     ((vcpu->arch.sie_block->ecb & 0x10))
  27 #define TDB_FORMAT1             1
  28 #define IS_ITDB_VALID(vcpu)     ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
  29
  30 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
  31 do { \
  32         debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
  33           d_args); \
  34 } while (0)
  35
  36 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
  37 do { \
  38         debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
  39           "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
  40           d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
  41           d_args); \
  42 } while (0)
  43
  44 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
  45 {
  46         return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
  47 }
  48
  49 static inline int kvm_is_ucontrol(struct kvm *kvm)
  50 {
  51 #ifdef CONFIG_KVM_S390_UCONTROL
  52         if (kvm->arch.gmap)
  53                 return 0;
  54         return 1;
  55 #else
  56         return 0;
  57 #endif
  58 }
  59
  60 #define GUEST_PREFIX_SHIFT 13
  61 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
  62 {
  63         return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
  64 }
  65
  66 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
  67 {
  68         vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
  69         kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
  70         kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
  71 }
  72
  73 typedef u8 __bitwise ar_t;
  74
  75 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, ar_t *ar)
  76 {
  77         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
  78         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
  79
  80         if (ar)
  81                 *ar = base2;
  82
  83         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
  84 }
  85
  86 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
  87                                               u64 *address1, u64 *address2,
  88                                               ar_t *ar_b1, ar_t *ar_b2)
  89 {
  90         u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
  91         u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
  92         u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
  93         u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
  94
  95         *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
  96         *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
  97
  98         if (ar_b1)
  99                 *ar_b1 = base1;
 100         if (ar_b2)
 101                 *ar_b2 = base2;
 102 }
 103
 104 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
 105 {
 106         if (r1)
 107                 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
 108         if (r2)
 109                 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
 110 }
 111
 112 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, ar_t *ar)
 113 {
 114         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
 115         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
 116                         ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
 117         /* The displacement is a 20bit _SIGNED_ value */
 118         if (disp2 & 0x80000)
 119                 disp2+=0xfff00000;
 120
 121         if (ar)
 122                 *ar = base2;
 123
 124         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
 125 }
 126
 127 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, ar_t *ar)
 128 {
 129         u32 base2 = vcpu->arch.sie_block->ipb >> 28;
 130         u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
 131
 132         if (ar)
 133                 *ar = base2;
 134
 135         return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
 136 }
 137
 138 /* Set the condition code in the guest program status word */
 139 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
 140 {
 141         vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
 142         vcpu->arch.sie_block->gpsw.mask |= cc << 44;
 143 }
 144
 145 /* test availability of facility in a kvm instance */
 146 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
 147 {
 148         return __test_facility(nr, kvm->arch.model.fac->mask) &&
 149                 __test_facility(nr, kvm->arch.model.fac->list);
 150 }
 151
 152 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
 153 {
 154         unsigned char *ptr;
 155
 156         if (nr >= MAX_FACILITY_BIT)
 157                 return -EINVAL;
 158         ptr = (unsigned char *) fac_list + (nr >> 3);
 159         *ptr |= (0x80UL >> (nr & 7));
 160         return 0;
 161 }
 162
 163 /* are cpu states controlled by user space */
 164 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
 165 {
 166         return kvm->arch.user_cpu_state_ctrl != 0;
 167 }
 168
 169 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
 170 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
 171 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
 172 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
 173 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
 174 void kvm_s390_clear_float_irqs(struct kvm *kvm);
 175 int __must_check kvm_s390_inject_vm(struct kvm *kvm,
 176                                     struct kvm_s390_interrupt *s390int);
 177 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
 178                                       struct kvm_s390_irq *irq);
 179 int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
 180 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
 181                                                     u64 isc_mask, u32 schid);
 182 int kvm_s390_reinject_io_int(struct kvm *kvm,
 183                              struct kvm_s390_interrupt_info *inti);
 184 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
 185
 186 /* implemented in intercept.c */
 187 void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilc);
 188 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
 189
 190 /* implemented in priv.c */
 191 int is_valid_psw(psw_t *psw);
 192 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
 193 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
 194 int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
 195 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
 196 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
 197 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
 198 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
 199 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
 200
 201 /* implemented in sigp.c */
 202 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
 203 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
 204
 205 /* implemented in kvm-s390.c */
 206 long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
 207 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
 208 int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu,
 209                                         unsigned long addr);
 210 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
 211 int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr);
 212 void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
 213 void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
 214 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
 215 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
 216 void exit_sie(struct kvm_vcpu *vcpu);
 217 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
 218 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
 219 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
 220 /* is cmma enabled */
 221 bool kvm_s390_cmma_enabled(struct kvm *kvm);
 222 unsigned long kvm_s390_fac_list_mask_size(void);
 223 extern unsigned long kvm_s390_fac_list_mask[];
 224
 225 /* implemented in diag.c */
 226 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
 227 /* implemented in interrupt.c */
 228 int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
 229                              struct kvm_s390_pgm_info *pgm_info);
 230
 231 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
 232 {
 233         int i;
 234         struct kvm_vcpu *vcpu;
 235
 236         WARN_ON(!mutex_is_locked(&kvm->lock));
 237         kvm_for_each_vcpu(i, vcpu, kvm)
 238                 kvm_s390_vcpu_block(vcpu);
 239 }
 240
 241 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
 242 {
 243         int i;
 244         struct kvm_vcpu *vcpu;
 245
 246         kvm_for_each_vcpu(i, vcpu, kvm)
 247                 kvm_s390_vcpu_unblock(vcpu);
 248 }
 249
 250 /**
 251  * kvm_s390_inject_prog_cond - conditionally inject a program check
 252  * @vcpu: virtual cpu
 253  * @rc: original return/error code
 254  *
 255  * This function is supposed to be used after regular guest access functions
 256  * failed, to conditionally inject a program check to a vcpu. The typical
 257  * pattern would look like
 258  *
 259  * rc = write_guest(vcpu, addr, data, len);
 260  * if (rc)
 261  *      return kvm_s390_inject_prog_cond(vcpu, rc);
 262  *
 263  * A negative return code from guest access functions implies an internal error
 264  * like e.g. out of memory. In these cases no program check should be injected
 265  * to the guest.
 266  * A positive value implies that an exception happened while accessing a guest's
 267  * memory. In this case all data belonging to the corresponding program check
 268  * has been stored in vcpu->arch.pgm and can be injected with
 269  * kvm_s390_inject_prog_irq().
 270  *
 271  * Returns: - the original @rc value if @rc was negative (internal error)
 272  *          - zero if @rc was already zero
 273  *          - zero or error code from injecting if @rc was positive
 274  *            (program check injected to @vcpu)
 275  */
 276 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
 277 {
 278         if (rc <= 0)
 279                 return rc;
 280         return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
 281 }
 282
 283 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
 284                         struct kvm_s390_irq *s390irq);
 285
 286 /* implemented in interrupt.c */
 287 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
 288 int psw_extint_disabled(struct kvm_vcpu *vcpu);
 289 void kvm_s390_destroy_adapters(struct kvm *kvm);
 290 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
 291 extern struct kvm_device_ops kvm_flic_ops;
 292 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
 293 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
 294 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
 295                            void __user *buf, int len);
 296 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
 297                            __u8 __user *buf, int len);
 298
 299 /* implemented in guestdbg.c */
 300 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
 301 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
 302 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
 303 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
 304                             struct kvm_guest_debug *dbg);
 305 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
 306 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
 307 void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
 308
 309 #endif