1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * definition for kvm on s390 4 * 5 * Copyright IBM Corp. 2008, 2020 6 * 7 * Author(s): Carsten Otte <cotte@de.ibm.com> 8 * Christian Borntraeger <borntraeger@de.ibm.com> 9 * Christian Ehrhardt <ehrhardt@de.ibm.com> 10 */ 11 12 #ifndef ARCH_S390_KVM_S390_H 13 #define ARCH_S390_KVM_S390_H 14 15 #include <linux/hrtimer.h> 16 #include <linux/kvm.h> 17 #include <linux/kvm_host.h> 18 #include <linux/lockdep.h> 19 #include <asm/facility.h> 20 #include <asm/processor.h> 21 #include <asm/sclp.h> 22 23 #define KVM_S390_UCONTROL_MEMSLOT (KVM_USER_MEM_SLOTS + 0) 24 25 static inline void kvm_s390_fpu_store(struct kvm_run *run) 26 { 27 fpu_stfpc(&run->s.regs.fpc); 28 if (cpu_has_vx()) 29 save_vx_regs((__vector128 *)&run->s.regs.vrs); 30 else 31 save_fp_regs((freg_t *)&run->s.regs.fprs); 32 } 33 34 static inline void kvm_s390_fpu_load(struct kvm_run *run) 35 { 36 fpu_lfpc_safe(&run->s.regs.fpc); 37 if (cpu_has_vx()) 38 load_vx_regs((__vector128 *)&run->s.regs.vrs); 39 else 40 load_fp_regs((freg_t *)&run->s.regs.fprs); 41 } 42 43 /* Transactional Memory Execution related macros */ 44 #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE)) 45 #define TDB_FORMAT1 1 46 #define IS_ITDB_VALID(vcpu) \ 47 ((*(char *)phys_to_virt((vcpu)->arch.sie_block->itdba) == TDB_FORMAT1)) 48 49 extern debug_info_t *kvm_s390_dbf; 50 extern debug_info_t *kvm_s390_dbf_uv; 51 52 #define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 53 do { \ 54 debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \ 55 d_args); \ 56 debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \ 57 "%d: " d_string "\n", (d_kvm)->userspace_pid, \ 58 d_args); \ 59 } while (0) 60 61 #define KVM_EVENT(d_loglevel, d_string, d_args...)\ 62 do { \ 63 debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \ 64 d_args); \ 65 } while (0) 66 67 #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\ 68 do { \ 69 debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \ 70 d_args); \ 71 } while (0) 72 73 #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\ 74 do { \ 75 debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \ 76 "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \ 77 d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\ 78 d_args); \ 79 } while (0) 80 81 static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 82 { 83 atomic_or(flags, &vcpu->arch.sie_block->cpuflags); 84 } 85 86 static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 87 { 88 atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags); 89 } 90 91 static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags) 92 { 93 return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags; 94 } 95 96 static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu) 97 { 98 return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED); 99 } 100 101 static inline int is_vcpu_idle(struct kvm_vcpu *vcpu) 102 { 103 return test_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask); 104 } 105 106 static inline int kvm_is_ucontrol(struct kvm *kvm) 107 { 108 #ifdef CONFIG_KVM_S390_UCONTROL 109 if (kvm->arch.gmap) 110 return 0; 111 return 1; 112 #else 113 return 0; 114 #endif 115 } 116 117 #define GUEST_PREFIX_SHIFT 13 118 static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) 119 { 120 return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; 121 } 122 123 static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) 124 { 125 VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id, 126 prefix); 127 vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; 128 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); 129 kvm_make_request(KVM_REQ_REFRESH_GUEST_PREFIX, vcpu); 130 } 131 132 static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar) 133 { 134 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 135 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 136 137 if (ar) 138 *ar = base2; 139 140 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 141 } 142 143 static inline u64 kvm_s390_get_base_disp_siy(struct kvm_vcpu *vcpu, u8 *ar) 144 { 145 u32 base1 = vcpu->arch.sie_block->ipb >> 28; 146 s64 disp1; 147 148 /* The displacement is a 20bit _SIGNED_ value */ 149 disp1 = sign_extend64(((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 150 ((vcpu->arch.sie_block->ipb & 0xff00) << 4), 19); 151 152 if (ar) 153 *ar = base1; 154 155 return (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 156 } 157 158 static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu, 159 u64 *address1, u64 *address2, 160 u8 *ar_b1, u8 *ar_b2) 161 { 162 u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28; 163 u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16; 164 u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12; 165 u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff; 166 167 *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1; 168 *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 169 170 if (ar_b1) 171 *ar_b1 = base1; 172 if (ar_b2) 173 *ar_b2 = base2; 174 } 175 176 static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2) 177 { 178 if (r1) 179 *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20; 180 if (r2) 181 *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16; 182 } 183 184 static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar) 185 { 186 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 187 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) + 188 ((vcpu->arch.sie_block->ipb & 0xff00) << 4); 189 /* The displacement is a 20bit _SIGNED_ value */ 190 if (disp2 & 0x80000) 191 disp2+=0xfff00000; 192 193 if (ar) 194 *ar = base2; 195 196 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2; 197 } 198 199 static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar) 200 { 201 u32 base2 = vcpu->arch.sie_block->ipb >> 28; 202 u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16); 203 204 if (ar) 205 *ar = base2; 206 207 return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2; 208 } 209 210 /* Set the condition code in the guest program status word */ 211 static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc) 212 { 213 vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44); 214 vcpu->arch.sie_block->gpsw.mask |= cc << 44; 215 } 216 217 /* test availability of facility in a kvm instance */ 218 static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr) 219 { 220 return __test_facility(nr, kvm->arch.model.fac_mask) && 221 __test_facility(nr, kvm->arch.model.fac_list); 222 } 223 224 static inline int set_kvm_facility(u64 *fac_list, unsigned long nr) 225 { 226 unsigned char *ptr; 227 228 if (nr >= MAX_FACILITY_BIT) 229 return -EINVAL; 230 ptr = (unsigned char *) fac_list + (nr >> 3); 231 *ptr |= (0x80UL >> (nr & 7)); 232 return 0; 233 } 234 235 static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr) 236 { 237 WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS); 238 return test_bit_inv(nr, kvm->arch.cpu_feat); 239 } 240 241 /* are cpu states controlled by user space */ 242 static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm) 243 { 244 return kvm->arch.user_cpu_state_ctrl != 0; 245 } 246 247 static inline void kvm_s390_set_user_cpu_state_ctrl(struct kvm *kvm) 248 { 249 if (kvm->arch.user_cpu_state_ctrl) 250 return; 251 252 VM_EVENT(kvm, 3, "%s", "ENABLE: Userspace CPU state control"); 253 kvm->arch.user_cpu_state_ctrl = 1; 254 } 255 256 /* get the end gfn of the last (highest gfn) memslot */ 257 static inline unsigned long kvm_s390_get_gfn_end(struct kvm_memslots *slots) 258 { 259 struct rb_node *node; 260 struct kvm_memory_slot *ms; 261 262 if (WARN_ON(kvm_memslots_empty(slots))) 263 return 0; 264 265 node = rb_last(&slots->gfn_tree); 266 ms = container_of(node, struct kvm_memory_slot, gfn_node[slots->node_idx]); 267 return ms->base_gfn + ms->npages; 268 } 269 270 static inline u32 kvm_s390_get_gisa_desc(struct kvm *kvm) 271 { 272 u32 gd; 273 274 if (!kvm->arch.gisa_int.origin) 275 return 0; 276 277 gd = virt_to_phys(kvm->arch.gisa_int.origin); 278 279 if (gd && sclp.has_gisaf) 280 gd |= GISA_FORMAT1; 281 return gd; 282 } 283 284 static inline hva_t gpa_to_hva(struct kvm *kvm, gpa_t gpa) 285 { 286 hva_t hva = gfn_to_hva(kvm, gpa_to_gfn(gpa)); 287 288 if (!kvm_is_error_hva(hva)) 289 hva |= offset_in_page(gpa); 290 return hva; 291 } 292 293 /* implemented in pv.c */ 294 int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc); 295 int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc); 296 int kvm_s390_pv_set_aside(struct kvm *kvm, u16 *rc, u16 *rrc); 297 int kvm_s390_pv_deinit_aside_vm(struct kvm *kvm, u16 *rc, u16 *rrc); 298 int kvm_s390_pv_deinit_cleanup_all(struct kvm *kvm, u16 *rc, u16 *rrc); 299 int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc); 300 int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc); 301 int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc, 302 u16 *rrc); 303 int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size, 304 unsigned long tweak, u16 *rc, u16 *rrc); 305 int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state); 306 int kvm_s390_pv_dump_cpu(struct kvm_vcpu *vcpu, void *buff, u16 *rc, u16 *rrc); 307 int kvm_s390_pv_dump_stor_state(struct kvm *kvm, void __user *buff_user, 308 u64 *gaddr, u64 buff_user_len, u16 *rc, u16 *rrc); 309 int kvm_s390_pv_dump_complete(struct kvm *kvm, void __user *buff_user, 310 u16 *rc, u16 *rrc); 311 int kvm_s390_pv_destroy_page(struct kvm *kvm, unsigned long gaddr); 312 int kvm_s390_pv_convert_to_secure(struct kvm *kvm, unsigned long gaddr); 313 int kvm_s390_pv_make_secure(struct kvm *kvm, unsigned long gaddr, void *uvcb); 314 315 static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm) 316 { 317 return kvm->arch.pv.handle; 318 } 319 320 static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu) 321 { 322 return vcpu->arch.pv.handle; 323 } 324 325 /** 326 * __kvm_s390_pv_destroy_page() - Destroy a guest page. 327 * @page: the page to destroy 328 * 329 * An attempt will be made to destroy the given guest page. If the attempt 330 * fails, an attempt is made to export the page. If both attempts fail, an 331 * appropriate error is returned. 332 * 333 * Context: must be called holding the mm lock for gmap->mm 334 */ 335 static inline int __kvm_s390_pv_destroy_page(struct page *page) 336 { 337 struct folio *folio = page_folio(page); 338 int rc; 339 340 /* Large folios cannot be secure. Small folio implies FW_LEVEL_PTE. */ 341 if (folio_test_large(folio)) 342 return -EFAULT; 343 344 rc = uv_destroy_folio(folio); 345 /* 346 * Fault handlers can race; it is possible that two CPUs will fault 347 * on the same secure page. One CPU can destroy the page, reboot, 348 * re-enter secure mode and import it, while the second CPU was 349 * stuck at the beginning of the handler. At some point the second 350 * CPU will be able to progress, and it will not be able to destroy 351 * the page. In that case we do not want to terminate the process, 352 * we instead try to export the page. 353 */ 354 if (rc) 355 rc = uv_convert_from_secure_folio(folio); 356 357 return rc; 358 } 359 360 /* implemented in interrupt.c */ 361 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu); 362 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu); 363 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer); 364 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu); 365 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu); 366 void kvm_s390_clear_float_irqs(struct kvm *kvm); 367 int __must_check kvm_s390_inject_vm(struct kvm *kvm, 368 struct kvm_s390_interrupt *s390int); 369 int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, 370 struct kvm_s390_irq *irq); 371 static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu, 372 struct kvm_s390_pgm_info *pgm_info) 373 { 374 struct kvm_s390_irq irq = { 375 .type = KVM_S390_PROGRAM_INT, 376 .u.pgm = *pgm_info, 377 }; 378 379 return kvm_s390_inject_vcpu(vcpu, &irq); 380 } 381 static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) 382 { 383 struct kvm_s390_irq irq = { 384 .type = KVM_S390_PROGRAM_INT, 385 .u.pgm.code = code, 386 }; 387 388 return kvm_s390_inject_vcpu(vcpu, &irq); 389 } 390 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 391 u64 isc_mask, u32 schid); 392 int kvm_s390_reinject_io_int(struct kvm *kvm, 393 struct kvm_s390_interrupt_info *inti); 394 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked); 395 396 /* implemented in intercept.c */ 397 u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu); 398 int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu); 399 static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen) 400 { 401 struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block; 402 403 sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen); 404 } 405 static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen) 406 { 407 kvm_s390_rewind_psw(vcpu, -ilen); 408 } 409 static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu) 410 { 411 /* don't inject PER events if we re-execute the instruction */ 412 vcpu->arch.sie_block->icptstatus &= ~0x02; 413 kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu)); 414 } 415 416 int handle_sthyi(struct kvm_vcpu *vcpu); 417 418 /* implemented in priv.c */ 419 int is_valid_psw(psw_t *psw); 420 int kvm_s390_handle_aa(struct kvm_vcpu *vcpu); 421 int kvm_s390_handle_b2(struct kvm_vcpu *vcpu); 422 int kvm_s390_handle_e3(struct kvm_vcpu *vcpu); 423 int kvm_s390_handle_e5(struct kvm_vcpu *vcpu); 424 int kvm_s390_handle_01(struct kvm_vcpu *vcpu); 425 int kvm_s390_handle_b9(struct kvm_vcpu *vcpu); 426 int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu); 427 int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu); 428 int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu); 429 int kvm_s390_handle_eb(struct kvm_vcpu *vcpu); 430 int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu); 431 432 /* implemented in vsie.c */ 433 int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu); 434 void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu); 435 void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start, 436 unsigned long end); 437 void kvm_s390_vsie_init(struct kvm *kvm); 438 void kvm_s390_vsie_destroy(struct kvm *kvm); 439 int gmap_shadow_valid(struct gmap *sg, unsigned long asce, int edat_level); 440 441 /* implemented in gmap-vsie.c */ 442 struct gmap *gmap_shadow(struct gmap *parent, unsigned long asce, int edat_level); 443 444 /* implemented in sigp.c */ 445 int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu); 446 int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu); 447 448 /* implemented in kvm-s390.c */ 449 int kvm_s390_try_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod); 450 int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr); 451 int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr); 452 int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu); 453 int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu); 454 void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu); 455 void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu); 456 bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu); 457 void exit_sie(struct kvm_vcpu *vcpu); 458 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu); 459 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu); 460 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu); 461 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm); 462 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu); 463 int kvm_s390_cpus_from_pv(struct kvm *kvm, u16 *rc, u16 *rrc); 464 int __kvm_s390_handle_dat_fault(struct kvm_vcpu *vcpu, gfn_t gfn, gpa_t gaddr, unsigned int flags); 465 int __kvm_s390_mprotect_many(struct gmap *gmap, gpa_t gpa, u8 npages, unsigned int prot, 466 unsigned long bits); 467 468 static inline int kvm_s390_handle_dat_fault(struct kvm_vcpu *vcpu, gpa_t gaddr, unsigned int flags) 469 { 470 return __kvm_s390_handle_dat_fault(vcpu, gpa_to_gfn(gaddr), gaddr, flags); 471 } 472 473 /* implemented in diag.c */ 474 int kvm_s390_handle_diag(struct kvm_vcpu *vcpu); 475 476 static inline void kvm_s390_vcpu_block_all(struct kvm *kvm) 477 { 478 unsigned long i; 479 struct kvm_vcpu *vcpu; 480 481 WARN_ON(!mutex_is_locked(&kvm->lock)); 482 kvm_for_each_vcpu(i, vcpu, kvm) 483 kvm_s390_vcpu_block(vcpu); 484 } 485 486 static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm) 487 { 488 unsigned long i; 489 struct kvm_vcpu *vcpu; 490 491 kvm_for_each_vcpu(i, vcpu, kvm) 492 kvm_s390_vcpu_unblock(vcpu); 493 } 494 495 static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm) 496 { 497 u64 rc; 498 499 preempt_disable(); 500 rc = get_tod_clock_fast() + kvm->arch.epoch; 501 preempt_enable(); 502 return rc; 503 } 504 505 /** 506 * kvm_s390_inject_prog_cond - conditionally inject a program check 507 * @vcpu: virtual cpu 508 * @rc: original return/error code 509 * 510 * This function is supposed to be used after regular guest access functions 511 * failed, to conditionally inject a program check to a vcpu. The typical 512 * pattern would look like 513 * 514 * rc = write_guest(vcpu, addr, data, len); 515 * if (rc) 516 * return kvm_s390_inject_prog_cond(vcpu, rc); 517 * 518 * A negative return code from guest access functions implies an internal error 519 * like e.g. out of memory. In these cases no program check should be injected 520 * to the guest. 521 * A positive value implies that an exception happened while accessing a guest's 522 * memory. In this case all data belonging to the corresponding program check 523 * has been stored in vcpu->arch.pgm and can be injected with 524 * kvm_s390_inject_prog_irq(). 525 * 526 * Returns: - the original @rc value if @rc was negative (internal error) 527 * - zero if @rc was already zero 528 * - zero or error code from injecting if @rc was positive 529 * (program check injected to @vcpu) 530 */ 531 static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc) 532 { 533 if (rc <= 0) 534 return rc; 535 return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); 536 } 537 538 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 539 struct kvm_s390_irq *s390irq); 540 541 /* implemented in interrupt.c */ 542 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop); 543 int psw_extint_disabled(struct kvm_vcpu *vcpu); 544 void kvm_s390_destroy_adapters(struct kvm *kvm); 545 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu); 546 extern struct kvm_device_ops kvm_flic_ops; 547 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu); 548 int kvm_s390_is_restart_irq_pending(struct kvm_vcpu *vcpu); 549 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu); 550 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, 551 void __user *buf, int len); 552 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, 553 __u8 __user *buf, int len); 554 void kvm_s390_gisa_init(struct kvm *kvm); 555 void kvm_s390_gisa_clear(struct kvm *kvm); 556 void kvm_s390_gisa_destroy(struct kvm *kvm); 557 void kvm_s390_gisa_disable(struct kvm *kvm); 558 void kvm_s390_gisa_enable(struct kvm *kvm); 559 int __init kvm_s390_gib_init(u8 nisc); 560 void kvm_s390_gib_destroy(void); 561 562 /* implemented in guestdbg.c */ 563 void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu); 564 void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu); 565 void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu); 566 int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu, 567 struct kvm_guest_debug *dbg); 568 void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu); 569 void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu); 570 int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu); 571 int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu); 572 573 /* support for Basic/Extended SCA handling */ 574 static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm) 575 { 576 struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */ 577 578 return &sca->ipte_control; 579 } 580 static inline int kvm_s390_use_sca_entries(void) 581 { 582 /* 583 * Without SIGP interpretation, only SRS interpretation (if available) 584 * might use the entries. By not setting the entries and keeping them 585 * invalid, hardware will not access them but intercept. 586 */ 587 return sclp.has_sigpif; 588 } 589 void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, 590 struct mcck_volatile_info *mcck_info); 591 592 static inline bool kvm_s390_cur_gmap_fault_is_write(void) 593 { 594 if (current->thread.gmap_int_code == PGM_PROTECTION) 595 return true; 596 return test_facility(75) && (current->thread.gmap_teid.fsi == TEID_FSI_STORE); 597 } 598 599 /** 600 * kvm_s390_vcpu_crypto_reset_all 601 * 602 * Reset the crypto attributes for each vcpu. This can be done while the vcpus 603 * are running as each vcpu will be removed from SIE before resetting the crypt 604 * attributes and restored to SIE afterward. 605 * 606 * Note: The kvm->lock must be held while calling this function 607 * 608 * @kvm: the KVM guest 609 */ 610 void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm); 611 612 /** 613 * kvm_s390_vcpu_pci_enable_interp 614 * 615 * Set the associated PCI attributes for each vcpu to allow for zPCI Load/Store 616 * interpretation as well as adapter interruption forwarding. 617 * 618 * @kvm: the KVM guest 619 */ 620 void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm); 621 622 /** 623 * diag9c_forwarding_hz 624 * 625 * Set the maximum number of diag9c forwarding per second 626 */ 627 extern unsigned int diag9c_forwarding_hz; 628 629 #endif 630