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interrupt.c
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linux-6.19.14/arch/s390/kvm/interrupt.c
1// SPDX-License-Identifier: GPL-2.0 2/* 3 * handling kvm guest interrupts 4 * 5 * Copyright IBM Corp. 2008, 2020 6 * 7 * Author(s): Carsten Otte <cotte@de.ibm.com> 8 */ 9 10#define pr_fmt(fmt) "kvm-s390: " fmt 11 12#include <linux/cpufeature.h> 13#include <linux/interrupt.h> 14#include <linux/kvm_host.h> 15#include <linux/hrtimer.h> 16#include <linux/export.h> 17#include <linux/mmu_context.h> 18#include <linux/nospec.h> 19#include <linux/signal.h> 20#include <linux/slab.h> 21#include <linux/bitmap.h> 22#include <linux/vmalloc.h> 23#include <asm/access-regs.h> 24#include <asm/asm-offsets.h> 25#include <asm/dis.h> 26#include <linux/uaccess.h> 27#include <asm/sclp.h> 28#include <asm/isc.h> 29#include <asm/gmap.h> 30#include <asm/nmi.h> 31#include <asm/airq.h> 32#include <asm/tpi.h> 33#include "kvm-s390.h" 34#include "gaccess.h" 35#include "trace-s390.h" 36#include "pci.h" 37 38#define PFAULT_INIT 0x0600 39#define PFAULT_DONE 0x0680 40#define VIRTIO_PARAM 0x0d00 41 42static struct kvm_s390_gib *gib; 43 44/* handle external calls via sigp interpretation facility */ 45static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id) 46{ 47 struct esca_block *sca = vcpu->kvm->arch.sca; 48 union esca_sigp_ctrl sigp_ctrl = sca->cpu[vcpu->vcpu_id].sigp_ctrl; 49 50 if (!kvm_s390_test_cpuflags(vcpu, CPUSTAT_ECALL_PEND)) 51 return 0; 52 53 BUG_ON(!kvm_s390_use_sca_entries()); 54 55 if (src_id) 56 *src_id = sigp_ctrl.scn; 57 58 return sigp_ctrl.c; 59} 60 61static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id) 62{ 63 struct esca_block *sca = vcpu->kvm->arch.sca; 64 union esca_sigp_ctrl *sigp_ctrl = &sca->cpu[vcpu->vcpu_id].sigp_ctrl; 65 union esca_sigp_ctrl old_val, new_val = {.scn = src_id, .c = 1}; 66 int expect, rc; 67 68 BUG_ON(!kvm_s390_use_sca_entries()); 69 70 old_val = READ_ONCE(*sigp_ctrl); 71 old_val.c = 0; 72 73 expect = old_val.value; 74 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value); 75 76 if (rc != expect) { 77 /* another external call is pending */ 78 return -EBUSY; 79 } 80 kvm_s390_set_cpuflags(vcpu, CPUSTAT_ECALL_PEND); 81 return 0; 82} 83 84static void sca_clear_ext_call(struct kvm_vcpu *vcpu) 85{ 86 struct esca_block *sca = vcpu->kvm->arch.sca; 87 union esca_sigp_ctrl *sigp_ctrl = &sca->cpu[vcpu->vcpu_id].sigp_ctrl; 88 89 if (!kvm_s390_use_sca_entries()) 90 return; 91 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_ECALL_PEND); 92 93 WRITE_ONCE(sigp_ctrl->value, 0); 94} 95 96int psw_extint_disabled(struct kvm_vcpu *vcpu) 97{ 98 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); 99} 100 101static int psw_ioint_disabled(struct kvm_vcpu *vcpu) 102{ 103 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); 104} 105 106static int psw_mchk_disabled(struct kvm_vcpu *vcpu) 107{ 108 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); 109} 110 111static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) 112{ 113 return psw_extint_disabled(vcpu) && 114 psw_ioint_disabled(vcpu) && 115 psw_mchk_disabled(vcpu); 116} 117 118static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) 119{ 120 if (psw_extint_disabled(vcpu) || 121 !(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK)) 122 return 0; 123 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) 124 /* No timer interrupts when single stepping */ 125 return 0; 126 return 1; 127} 128 129static int ckc_irq_pending(struct kvm_vcpu *vcpu) 130{ 131 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm); 132 const u64 ckc = vcpu->arch.sie_block->ckc; 133 134 if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) { 135 if ((s64)ckc >= (s64)now) 136 return 0; 137 } else if (ckc >= now) { 138 return 0; 139 } 140 return ckc_interrupts_enabled(vcpu); 141} 142 143static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu) 144{ 145 return !psw_extint_disabled(vcpu) && 146 (vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK); 147} 148 149static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu) 150{ 151 if (!cpu_timer_interrupts_enabled(vcpu)) 152 return 0; 153 return kvm_s390_get_cpu_timer(vcpu) >> 63; 154} 155 156static uint64_t isc_to_isc_bits(int isc) 157{ 158 return (0x80 >> isc) << 24; 159} 160 161static inline u32 isc_to_int_word(u8 isc) 162{ 163 return ((u32)isc << 27) | 0x80000000; 164} 165 166static inline u8 int_word_to_isc(u32 int_word) 167{ 168 return (int_word & 0x38000000) >> 27; 169} 170 171/* 172 * To use atomic bitmap functions, we have to provide a bitmap address 173 * that is u64 aligned. However, the ipm might be u32 aligned. 174 * Therefore, we logically start the bitmap at the very beginning of the 175 * struct and fixup the bit number. 176 */ 177#define IPM_BIT_OFFSET (offsetof(struct kvm_s390_gisa, ipm) * BITS_PER_BYTE) 178 179/** 180 * gisa_set_iam - change the GISA interruption alert mask 181 * 182 * @gisa: gisa to operate on 183 * @iam: new IAM value to use 184 * 185 * Change the IAM atomically with the next alert address and the IPM 186 * of the GISA if the GISA is not part of the GIB alert list. All three 187 * fields are located in the first long word of the GISA. 188 * 189 * Returns: 0 on success 190 * -EBUSY in case the gisa is part of the alert list 191 */ 192static inline int gisa_set_iam(struct kvm_s390_gisa *gisa, u8 iam) 193{ 194 u64 word, _word; 195 196 word = READ_ONCE(gisa->u64.word[0]); 197 do { 198 if ((u64)gisa != word >> 32) 199 return -EBUSY; 200 _word = (word & ~0xffUL) | iam; 201 } while (!try_cmpxchg(&gisa->u64.word[0], &word, _word)); 202 203 return 0; 204} 205 206/** 207 * gisa_clear_ipm - clear the GISA interruption pending mask 208 * 209 * @gisa: gisa to operate on 210 * 211 * Clear the IPM atomically with the next alert address and the IAM 212 * of the GISA unconditionally. All three fields are located in the 213 * first long word of the GISA. 214 */ 215static inline void gisa_clear_ipm(struct kvm_s390_gisa *gisa) 216{ 217 u64 word, _word; 218 219 word = READ_ONCE(gisa->u64.word[0]); 220 do { 221 _word = word & ~(0xffUL << 24); 222 } while (!try_cmpxchg(&gisa->u64.word[0], &word, _word)); 223} 224 225/** 226 * gisa_get_ipm_or_restore_iam - return IPM or restore GISA IAM 227 * 228 * @gi: gisa interrupt struct to work on 229 * 230 * Atomically restores the interruption alert mask if none of the 231 * relevant ISCs are pending and return the IPM. 232 * 233 * Returns: the relevant pending ISCs 234 */ 235static inline u8 gisa_get_ipm_or_restore_iam(struct kvm_s390_gisa_interrupt *gi) 236{ 237 u8 pending_mask, alert_mask; 238 u64 word, _word; 239 240 word = READ_ONCE(gi->origin->u64.word[0]); 241 do { 242 alert_mask = READ_ONCE(gi->alert.mask); 243 pending_mask = (u8)(word >> 24) & alert_mask; 244 if (pending_mask) 245 return pending_mask; 246 _word = (word & ~0xffUL) | alert_mask; 247 } while (!try_cmpxchg(&gi->origin->u64.word[0], &word, _word)); 248 249 return 0; 250} 251 252static inline void gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc) 253{ 254 set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); 255} 256 257static inline u8 gisa_get_ipm(struct kvm_s390_gisa *gisa) 258{ 259 return READ_ONCE(gisa->ipm); 260} 261 262static inline int gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc) 263{ 264 return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); 265} 266 267static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu) 268{ 269 unsigned long pending = vcpu->kvm->arch.float_int.pending_irqs | 270 vcpu->arch.local_int.pending_irqs; 271 272 pending &= ~vcpu->kvm->arch.float_int.masked_irqs; 273 return pending; 274} 275 276static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) 277{ 278 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int; 279 unsigned long pending_mask; 280 281 pending_mask = pending_irqs_no_gisa(vcpu); 282 if (gi->origin) 283 pending_mask |= gisa_get_ipm(gi->origin) << IRQ_PEND_IO_ISC_7; 284 return pending_mask; 285} 286 287static inline int isc_to_irq_type(unsigned long isc) 288{ 289 return IRQ_PEND_IO_ISC_0 - isc; 290} 291 292static inline int irq_type_to_isc(unsigned long irq_type) 293{ 294 return IRQ_PEND_IO_ISC_0 - irq_type; 295} 296 297static unsigned long disable_iscs(struct kvm_vcpu *vcpu, 298 unsigned long active_mask) 299{ 300 int i; 301 302 for (i = 0; i <= MAX_ISC; i++) 303 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i))) 304 active_mask &= ~(1UL << (isc_to_irq_type(i))); 305 306 return active_mask; 307} 308 309static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu) 310{ 311 unsigned long active_mask; 312 313 active_mask = pending_irqs(vcpu); 314 if (!active_mask) 315 return 0; 316 317 if (psw_extint_disabled(vcpu)) 318 active_mask &= ~IRQ_PEND_EXT_MASK; 319 if (psw_ioint_disabled(vcpu)) 320 active_mask &= ~IRQ_PEND_IO_MASK; 321 else 322 active_mask = disable_iscs(vcpu, active_mask); 323 if (!(vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK)) 324 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask); 325 if (!(vcpu->arch.sie_block->gcr[0] & CR0_EMERGENCY_SIGNAL_SUBMASK)) 326 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask); 327 if (!(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK)) 328 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask); 329 if (!(vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK)) 330 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask); 331 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK)) { 332 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask); 333 __clear_bit(IRQ_PEND_EXT_SERVICE_EV, &active_mask); 334 } 335 if (psw_mchk_disabled(vcpu)) 336 active_mask &= ~IRQ_PEND_MCHK_MASK; 337 /* PV guest cpus can have a single interruption injected at a time. */ 338 if (kvm_s390_pv_cpu_get_handle(vcpu) && 339 vcpu->arch.sie_block->iictl != IICTL_CODE_NONE) 340 active_mask &= ~(IRQ_PEND_EXT_II_MASK | 341 IRQ_PEND_IO_MASK | 342 IRQ_PEND_MCHK_MASK); 343 /* 344 * Check both floating and local interrupt's cr14 because 345 * bit IRQ_PEND_MCHK_REP could be set in both cases. 346 */ 347 if (!(vcpu->arch.sie_block->gcr[14] & 348 (vcpu->kvm->arch.float_int.mchk.cr14 | 349 vcpu->arch.local_int.irq.mchk.cr14))) 350 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask); 351 352 /* 353 * STOP irqs will never be actively delivered. They are triggered via 354 * intercept requests and cleared when the stop intercept is performed. 355 */ 356 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask); 357 358 return active_mask; 359} 360 361static void __set_cpu_idle(struct kvm_vcpu *vcpu) 362{ 363 kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT); 364 set_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask); 365} 366 367static void __unset_cpu_idle(struct kvm_vcpu *vcpu) 368{ 369 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT); 370 clear_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask); 371} 372 373static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) 374{ 375 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IO_INT | CPUSTAT_EXT_INT | 376 CPUSTAT_STOP_INT); 377 vcpu->arch.sie_block->lctl = 0x0000; 378 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); 379 380 if (guestdbg_enabled(vcpu)) { 381 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | 382 LCTL_CR10 | LCTL_CR11); 383 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); 384 } 385} 386 387static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) 388{ 389 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK)) 390 return; 391 if (psw_ioint_disabled(vcpu)) 392 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT); 393 else 394 vcpu->arch.sie_block->lctl |= LCTL_CR6; 395} 396 397static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) 398{ 399 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK)) 400 return; 401 if (psw_extint_disabled(vcpu)) 402 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); 403 else 404 vcpu->arch.sie_block->lctl |= LCTL_CR0; 405} 406 407static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu) 408{ 409 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK)) 410 return; 411 if (psw_mchk_disabled(vcpu)) 412 vcpu->arch.sie_block->ictl |= ICTL_LPSW; 413 else 414 vcpu->arch.sie_block->lctl |= LCTL_CR14; 415} 416 417static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu) 418{ 419 if (kvm_s390_is_stop_irq_pending(vcpu)) 420 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT); 421} 422 423/* Set interception request for non-deliverable interrupts */ 424static void set_intercept_indicators(struct kvm_vcpu *vcpu) 425{ 426 set_intercept_indicators_io(vcpu); 427 set_intercept_indicators_ext(vcpu); 428 set_intercept_indicators_mchk(vcpu); 429 set_intercept_indicators_stop(vcpu); 430} 431 432static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) 433{ 434 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 435 int rc = 0; 436 437 vcpu->stat.deliver_cputm++; 438 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, 439 0, 0); 440 if (kvm_s390_pv_cpu_is_protected(vcpu)) { 441 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; 442 vcpu->arch.sie_block->eic = EXT_IRQ_CPU_TIMER; 443 } else { 444 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, 445 (u16 *)__LC_EXT_INT_CODE); 446 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); 447 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, 448 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 449 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, 450 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 451 } 452 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); 453 return rc ? -EFAULT : 0; 454} 455 456static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) 457{ 458 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 459 int rc = 0; 460 461 vcpu->stat.deliver_ckc++; 462 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, 463 0, 0); 464 if (kvm_s390_pv_cpu_is_protected(vcpu)) { 465 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; 466 vcpu->arch.sie_block->eic = EXT_IRQ_CLK_COMP; 467 } else { 468 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP, 469 (u16 __user *)__LC_EXT_INT_CODE); 470 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); 471 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, 472 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 473 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, 474 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 475 } 476 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); 477 return rc ? -EFAULT : 0; 478} 479 480static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu) 481{ 482 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 483 struct kvm_s390_ext_info ext; 484 int rc; 485 486 spin_lock(&li->lock); 487 ext = li->irq.ext; 488 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); 489 li->irq.ext.ext_params2 = 0; 490 spin_unlock(&li->lock); 491 492 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx", 493 ext.ext_params2); 494 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, 495 KVM_S390_INT_PFAULT_INIT, 496 0, ext.ext_params2); 497 498 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE); 499 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); 500 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, 501 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 502 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, 503 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 504 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2); 505 return rc ? -EFAULT : 0; 506} 507 508static int __write_machine_check(struct kvm_vcpu *vcpu, 509 struct kvm_s390_mchk_info *mchk) 510{ 511 unsigned long ext_sa_addr; 512 unsigned long lc; 513 freg_t fprs[NUM_FPRS]; 514 union mci mci; 515 int rc; 516 517 /* 518 * All other possible payload for a machine check (e.g. the register 519 * contents in the save area) will be handled by the ultravisor, as 520 * the hypervisor does not not have the needed information for 521 * protected guests. 522 */ 523 if (kvm_s390_pv_cpu_is_protected(vcpu)) { 524 vcpu->arch.sie_block->iictl = IICTL_CODE_MCHK; 525 vcpu->arch.sie_block->mcic = mchk->mcic; 526 vcpu->arch.sie_block->faddr = mchk->failing_storage_address; 527 vcpu->arch.sie_block->edc = mchk->ext_damage_code; 528 return 0; 529 } 530 531 mci.val = mchk->mcic; 532 /* take care of lazy register loading */ 533 kvm_s390_fpu_store(vcpu->run); 534 save_access_regs(vcpu->run->s.regs.acrs); 535 if (cpu_has_gs() && vcpu->arch.gs_enabled) 536 save_gs_cb(current->thread.gs_cb); 537 538 /* Extended save area */ 539 rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr, 540 sizeof(unsigned long)); 541 /* Only bits 0 through 63-LC are used for address formation */ 542 lc = ext_sa_addr & MCESA_LC_MASK; 543 if (test_kvm_facility(vcpu->kvm, 133)) { 544 switch (lc) { 545 case 0: 546 case 10: 547 ext_sa_addr &= ~0x3ffUL; 548 break; 549 case 11: 550 ext_sa_addr &= ~0x7ffUL; 551 break; 552 case 12: 553 ext_sa_addr &= ~0xfffUL; 554 break; 555 default: 556 ext_sa_addr = 0; 557 break; 558 } 559 } else { 560 ext_sa_addr &= ~0x3ffUL; 561 } 562 563 if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) { 564 if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs, 565 512)) 566 mci.vr = 0; 567 } else { 568 mci.vr = 0; 569 } 570 if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133) 571 && (lc == 11 || lc == 12)) { 572 if (write_guest_abs(vcpu, ext_sa_addr + 1024, 573 &vcpu->run->s.regs.gscb, 32)) 574 mci.gs = 0; 575 } else { 576 mci.gs = 0; 577 } 578 579 /* General interruption information */ 580 rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID); 581 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, 582 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 583 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, 584 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 585 rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE); 586 587 /* Register-save areas */ 588 if (cpu_has_vx()) { 589 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); 590 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128); 591 } else { 592 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, 593 vcpu->run->s.regs.fprs, 128); 594 } 595 rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA, 596 vcpu->run->s.regs.gprs, 128); 597 rc |= put_guest_lc(vcpu, vcpu->run->s.regs.fpc, 598 (u32 __user *) __LC_FP_CREG_SAVE_AREA); 599 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr, 600 (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA); 601 rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu), 602 (u64 __user *) __LC_CPU_TIMER_SAVE_AREA); 603 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8, 604 (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA); 605 rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA, 606 &vcpu->run->s.regs.acrs, 64); 607 rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA, 608 &vcpu->arch.sie_block->gcr, 128); 609 610 /* Extended interruption information */ 611 rc |= put_guest_lc(vcpu, mchk->ext_damage_code, 612 (u32 __user *) __LC_EXT_DAMAGE_CODE); 613 rc |= put_guest_lc(vcpu, mchk->failing_storage_address, 614 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); 615 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout, 616 sizeof(mchk->fixed_logout)); 617 return rc ? -EFAULT : 0; 618} 619 620static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) 621{ 622 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; 623 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 624 struct kvm_s390_mchk_info mchk = {}; 625 int deliver = 0; 626 int rc = 0; 627 628 spin_lock(&fi->lock); 629 spin_lock(&li->lock); 630 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) || 631 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) { 632 /* 633 * If there was an exigent machine check pending, then any 634 * repressible machine checks that might have been pending 635 * are indicated along with it, so always clear bits for 636 * repressible and exigent interrupts 637 */ 638 mchk = li->irq.mchk; 639 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); 640 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); 641 memset(&li->irq.mchk, 0, sizeof(mchk)); 642 deliver = 1; 643 } 644 /* 645 * We indicate floating repressible conditions along with 646 * other pending conditions. Channel Report Pending and Channel 647 * Subsystem damage are the only two and are indicated by 648 * bits in mcic and masked in cr14. 649 */ 650 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { 651 mchk.mcic |= fi->mchk.mcic; 652 mchk.cr14 |= fi->mchk.cr14; 653 memset(&fi->mchk, 0, sizeof(mchk)); 654 deliver = 1; 655 } 656 spin_unlock(&li->lock); 657 spin_unlock(&fi->lock); 658 659 if (deliver) { 660 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx", 661 mchk.mcic); 662 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, 663 KVM_S390_MCHK, 664 mchk.cr14, mchk.mcic); 665 vcpu->stat.deliver_machine_check++; 666 rc = __write_machine_check(vcpu, &mchk); 667 } 668 return rc; 669} 670 671static int __must_check __deliver_restart(struct kvm_vcpu *vcpu) 672{ 673 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 674 int rc = 0; 675 676 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart"); 677 vcpu->stat.deliver_restart_signal++; 678 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); 679 680 if (kvm_s390_pv_cpu_is_protected(vcpu)) { 681 vcpu->arch.sie_block->iictl = IICTL_CODE_RESTART; 682 } else { 683 rc = write_guest_lc(vcpu, 684 offsetof(struct lowcore, restart_old_psw), 685 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 686 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw), 687 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 688 } 689 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs); 690 return rc ? -EFAULT : 0; 691} 692 693static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu) 694{ 695 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 696 struct kvm_s390_prefix_info prefix; 697 698 spin_lock(&li->lock); 699 prefix = li->irq.prefix; 700 li->irq.prefix.address = 0; 701 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); 702 spin_unlock(&li->lock); 703 704 vcpu->stat.deliver_prefix_signal++; 705 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, 706 KVM_S390_SIGP_SET_PREFIX, 707 prefix.address, 0); 708 709 kvm_s390_set_prefix(vcpu, prefix.address); 710 return 0; 711} 712 713static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu) 714{ 715 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 716 int rc; 717 int cpu_addr; 718 719 spin_lock(&li->lock); 720 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS); 721 clear_bit(cpu_addr, li->sigp_emerg_pending); 722 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS)) 723 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); 724 spin_unlock(&li->lock); 725 726 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg"); 727 vcpu->stat.deliver_emergency_signal++; 728 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, 729 cpu_addr, 0); 730 if (kvm_s390_pv_cpu_is_protected(vcpu)) { 731 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; 732 vcpu->arch.sie_block->eic = EXT_IRQ_EMERGENCY_SIG; 733 vcpu->arch.sie_block->extcpuaddr = cpu_addr; 734 return 0; 735 } 736 737 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG, 738 (u16 *)__LC_EXT_INT_CODE); 739 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR); 740 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, 741 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 742 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, 743 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 744 return rc ? -EFAULT : 0; 745} 746 747static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu) 748{ 749 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 750 struct kvm_s390_extcall_info extcall; 751 int rc; 752 753 spin_lock(&li->lock); 754 extcall = li->irq.extcall; 755 li->irq.extcall.code = 0; 756 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); 757 spin_unlock(&li->lock); 758 759 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call"); 760 vcpu->stat.deliver_external_call++; 761 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, 762 KVM_S390_INT_EXTERNAL_CALL, 763 extcall.code, 0); 764 if (kvm_s390_pv_cpu_is_protected(vcpu)) { 765 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; 766 vcpu->arch.sie_block->eic = EXT_IRQ_EXTERNAL_CALL; 767 vcpu->arch.sie_block->extcpuaddr = extcall.code; 768 return 0; 769 } 770 771 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL, 772 (u16 *)__LC_EXT_INT_CODE); 773 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR); 774 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, 775 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 776 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, 777 sizeof(psw_t)); 778 return rc ? -EFAULT : 0; 779} 780 781static int __deliver_prog_pv(struct kvm_vcpu *vcpu, u16 code) 782{ 783 switch (code) { 784 case PGM_SPECIFICATION: 785 vcpu->arch.sie_block->iictl = IICTL_CODE_SPECIFICATION; 786 break; 787 case PGM_OPERAND: 788 vcpu->arch.sie_block->iictl = IICTL_CODE_OPERAND; 789 break; 790 default: 791 return -EINVAL; 792 } 793 return 0; 794} 795 796static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) 797{ 798 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 799 struct kvm_s390_pgm_info pgm_info; 800 int rc = 0, nullifying = false; 801 u16 ilen; 802 803 spin_lock(&li->lock); 804 pgm_info = li->irq.pgm; 805 clear_bit(IRQ_PEND_PROG, &li->pending_irqs); 806 memset(&li->irq.pgm, 0, sizeof(pgm_info)); 807 spin_unlock(&li->lock); 808 809 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK; 810 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d", 811 pgm_info.code, ilen); 812 vcpu->stat.deliver_program++; 813 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, 814 pgm_info.code, 0); 815 816 /* PER is handled by the ultravisor */ 817 if (kvm_s390_pv_cpu_is_protected(vcpu)) 818 return __deliver_prog_pv(vcpu, pgm_info.code & ~PGM_PER); 819 820 switch (pgm_info.code & ~PGM_PER) { 821 case PGM_AFX_TRANSLATION: 822 case PGM_ASX_TRANSLATION: 823 case PGM_EX_TRANSLATION: 824 case PGM_LFX_TRANSLATION: 825 case PGM_LSTE_SEQUENCE: 826 case PGM_LSX_TRANSLATION: 827 case PGM_LX_TRANSLATION: 828 case PGM_PRIMARY_AUTHORITY: 829 case PGM_SECONDARY_AUTHORITY: 830 nullifying = true; 831 fallthrough; 832 case PGM_SPACE_SWITCH: 833 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, 834 (u64 *)__LC_TRANS_EXC_CODE); 835 break; 836 case PGM_ALEN_TRANSLATION: 837 case PGM_ALE_SEQUENCE: 838 case PGM_ASTE_INSTANCE: 839 case PGM_ASTE_SEQUENCE: 840 case PGM_ASTE_VALIDITY: 841 case PGM_EXTENDED_AUTHORITY: 842 rc = put_guest_lc(vcpu, pgm_info.exc_access_id, 843 (u8 *)__LC_EXC_ACCESS_ID); 844 nullifying = true; 845 break; 846 case PGM_ASCE_TYPE: 847 case PGM_PAGE_TRANSLATION: 848 case PGM_REGION_FIRST_TRANS: 849 case PGM_REGION_SECOND_TRANS: 850 case PGM_REGION_THIRD_TRANS: 851 case PGM_SEGMENT_TRANSLATION: 852 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, 853 (u64 *)__LC_TRANS_EXC_CODE); 854 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, 855 (u8 *)__LC_EXC_ACCESS_ID); 856 rc |= put_guest_lc(vcpu, pgm_info.op_access_id, 857 (u8 *)__LC_OP_ACCESS_ID); 858 nullifying = true; 859 break; 860 case PGM_MONITOR: 861 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr, 862 (u16 *)__LC_MON_CLASS_NR); 863 rc |= put_guest_lc(vcpu, pgm_info.mon_code, 864 (u64 *)__LC_MON_CODE); 865 break; 866 case PGM_VECTOR_PROCESSING: 867 case PGM_DATA: 868 rc = put_guest_lc(vcpu, pgm_info.data_exc_code, 869 (u32 *)__LC_DATA_EXC_CODE); 870 break; 871 case PGM_PROTECTION: 872 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, 873 (u64 *)__LC_TRANS_EXC_CODE); 874 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, 875 (u8 *)__LC_EXC_ACCESS_ID); 876 break; 877 case PGM_STACK_FULL: 878 case PGM_STACK_EMPTY: 879 case PGM_STACK_SPECIFICATION: 880 case PGM_STACK_TYPE: 881 case PGM_STACK_OPERATION: 882 case PGM_TRACE_TABEL: 883 case PGM_CRYPTO_OPERATION: 884 nullifying = true; 885 break; 886 } 887 888 if (pgm_info.code & PGM_PER) { 889 rc |= put_guest_lc(vcpu, pgm_info.per_code, 890 (u8 *) __LC_PER_CODE); 891 rc |= put_guest_lc(vcpu, pgm_info.per_atmid, 892 (u8 *)__LC_PER_ATMID); 893 rc |= put_guest_lc(vcpu, pgm_info.per_address, 894 (u64 *) __LC_PER_ADDRESS); 895 rc |= put_guest_lc(vcpu, pgm_info.per_access_id, 896 (u8 *) __LC_PER_ACCESS_ID); 897 } 898 899 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND)) 900 kvm_s390_rewind_psw(vcpu, ilen); 901 902 /* bit 1+2 of the target are the ilc, so we can directly use ilen */ 903 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC); 904 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea, 905 (u64 *) __LC_PGM_LAST_BREAK); 906 rc |= put_guest_lc(vcpu, pgm_info.code, (u16 *)__LC_PGM_CODE); 907 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, 908 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 909 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, 910 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 911 return rc ? -EFAULT : 0; 912} 913 914#define SCCB_MASK 0xFFFFFFF8 915#define SCCB_EVENT_PENDING 0x3 916 917static int write_sclp(struct kvm_vcpu *vcpu, u32 parm) 918{ 919 int rc; 920 921 if (kvm_s390_pv_cpu_get_handle(vcpu)) { 922 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; 923 vcpu->arch.sie_block->eic = EXT_IRQ_SERVICE_SIG; 924 vcpu->arch.sie_block->eiparams = parm; 925 return 0; 926 } 927 928 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE); 929 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); 930 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, 931 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 932 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, 933 &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); 934 rc |= put_guest_lc(vcpu, parm, 935 (u32 *)__LC_EXT_PARAMS); 936 937 return rc ? -EFAULT : 0; 938} 939 940static int __must_check __deliver_service(struct kvm_vcpu *vcpu) 941{ 942 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; 943 struct kvm_s390_ext_info ext; 944 945 spin_lock(&fi->lock); 946 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs) || 947 !(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) { 948 spin_unlock(&fi->lock); 949 return 0; 950 } 951 ext = fi->srv_signal; 952 memset(&fi->srv_signal, 0, sizeof(ext)); 953 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); 954 clear_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs); 955 if (kvm_s390_pv_cpu_is_protected(vcpu)) 956 set_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs); 957 spin_unlock(&fi->lock); 958 959 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x", 960 ext.ext_params); 961 vcpu->stat.deliver_service_signal++; 962 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE, 963 ext.ext_params, 0); 964 965 return write_sclp(vcpu, ext.ext_params); 966} 967 968static int __must_check __deliver_service_ev(struct kvm_vcpu *vcpu) 969{ 970 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; 971 struct kvm_s390_ext_info ext; 972 973 spin_lock(&fi->lock); 974 if (!(test_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs))) { 975 spin_unlock(&fi->lock); 976 return 0; 977 } 978 ext = fi->srv_signal; 979 /* only clear the event bits */ 980 fi->srv_signal.ext_params &= ~SCCB_EVENT_PENDING; 981 clear_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs); 982 spin_unlock(&fi->lock); 983 984 VCPU_EVENT(vcpu, 4, "%s", "deliver: sclp parameter event"); 985 vcpu->stat.deliver_service_signal++; 986 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE, 987 ext.ext_params, 0); 988 989 return write_sclp(vcpu, ext.ext_params & SCCB_EVENT_PENDING); 990} 991 992static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu) 993{ 994 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; 995 struct kvm_s390_interrupt_info *inti; 996 int rc = 0; 997 998 spin_lock(&fi->lock); 999 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT], 1000 struct kvm_s390_interrupt_info, 1001 list); 1002 if (inti) { 1003 list_del(&inti->list); 1004 fi->counters[FIRQ_CNTR_PFAULT] -= 1; 1005 } 1006 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT])) 1007 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); 1008 spin_unlock(&fi->lock); 1009 1010 if (inti) { 1011 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, 1012 KVM_S390_INT_PFAULT_DONE, 0, 1013 inti->ext.ext_params2); 1014 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx", 1015 inti->ext.ext_params2); 1016 1017 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, 1018 (u16 *)__LC_EXT_INT_CODE); 1019 rc |= put_guest_lc(vcpu, PFAULT_DONE, 1020 (u16 *)__LC_EXT_CPU_ADDR); 1021 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, 1022 &vcpu->arch.sie_block->gpsw, 1023 sizeof(psw_t)); 1024 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, 1025 &vcpu->arch.sie_block->gpsw, 1026 sizeof(psw_t)); 1027 rc |= put_guest_lc(vcpu, inti->ext.ext_params2, 1028 (u64 *)__LC_EXT_PARAMS2); 1029 kfree(inti); 1030 } 1031 return rc ? -EFAULT : 0; 1032} 1033 1034static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu) 1035{ 1036 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; 1037 struct kvm_s390_interrupt_info *inti; 1038 int rc = 0; 1039 1040 spin_lock(&fi->lock); 1041 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO], 1042 struct kvm_s390_interrupt_info, 1043 list); 1044 if (inti) { 1045 VCPU_EVENT(vcpu, 4, 1046 "deliver: virtio parm: 0x%x,parm64: 0x%llx", 1047 inti->ext.ext_params, inti->ext.ext_params2); 1048 vcpu->stat.deliver_virtio++; 1049 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, 1050 inti->type, 1051 inti->ext.ext_params, 1052 inti->ext.ext_params2); 1053 list_del(&inti->list); 1054 fi->counters[FIRQ_CNTR_VIRTIO] -= 1; 1055 } 1056 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO])) 1057 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); 1058 spin_unlock(&fi->lock); 1059 1060 if (inti) { 1061 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, 1062 (u16 *)__LC_EXT_INT_CODE); 1063 rc |= put_guest_lc(vcpu, VIRTIO_PARAM, 1064 (u16 *)__LC_EXT_CPU_ADDR); 1065 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, 1066 &vcpu->arch.sie_block->gpsw, 1067 sizeof(psw_t)); 1068 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, 1069 &vcpu->arch.sie_block->gpsw, 1070 sizeof(psw_t)); 1071 rc |= put_guest_lc(vcpu, inti->ext.ext_params, 1072 (u32 *)__LC_EXT_PARAMS); 1073 rc |= put_guest_lc(vcpu, inti->ext.ext_params2, 1074 (u64 *)__LC_EXT_PARAMS2); 1075 kfree(inti); 1076 } 1077 return rc ? -EFAULT : 0; 1078} 1079 1080static int __do_deliver_io(struct kvm_vcpu *vcpu, struct kvm_s390_io_info *io) 1081{ 1082 int rc; 1083 1084 if (kvm_s390_pv_cpu_is_protected(vcpu)) { 1085 vcpu->arch.sie_block->iictl = IICTL_CODE_IO; 1086 vcpu->arch.sie_block->subchannel_id = io->subchannel_id; 1087 vcpu->arch.sie_block->subchannel_nr = io->subchannel_nr; 1088 vcpu->arch.sie_block->io_int_parm = io->io_int_parm; 1089 vcpu->arch.sie_block->io_int_word = io->io_int_word; 1090 return 0; 1091 } 1092 1093 rc = put_guest_lc(vcpu, io->subchannel_id, (u16 *)__LC_SUBCHANNEL_ID); 1094 rc |= put_guest_lc(vcpu, io->subchannel_nr, (u16 *)__LC_SUBCHANNEL_NR); 1095 rc |= put_guest_lc(vcpu, io->io_int_parm, (u32 *)__LC_IO_INT_PARM); 1096 rc |= put_guest_lc(vcpu, io->io_int_word, (u32 *)__LC_IO_INT_WORD); 1097 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, 1098 &vcpu->arch.sie_block->gpsw, 1099 sizeof(psw_t)); 1100 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, 1101 &vcpu->arch.sie_block->gpsw, 1102 sizeof(psw_t)); 1103 return rc ? -EFAULT : 0; 1104} 1105 1106static int __must_check __deliver_io(struct kvm_vcpu *vcpu, 1107 unsigned long irq_type) 1108{ 1109 struct list_head *isc_list; 1110 struct kvm_s390_float_interrupt *fi; 1111 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int; 1112 struct kvm_s390_interrupt_info *inti = NULL; 1113 struct kvm_s390_io_info io; 1114 u32 isc; 1115 int rc = 0; 1116 1117 fi = &vcpu->kvm->arch.float_int; 1118 1119 spin_lock(&fi->lock); 1120 isc = irq_type_to_isc(irq_type); 1121 isc_list = &fi->lists[isc]; 1122 inti = list_first_entry_or_null(isc_list, 1123 struct kvm_s390_interrupt_info, 1124 list); 1125 if (inti) { 1126 if (inti->type & KVM_S390_INT_IO_AI_MASK) 1127 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)"); 1128 else 1129 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x", 1130 inti->io.subchannel_id >> 8, 1131 inti->io.subchannel_id >> 1 & 0x3, 1132 inti->io.subchannel_nr); 1133 1134 vcpu->stat.deliver_io++; 1135 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, 1136 inti->type, 1137 ((__u32)inti->io.subchannel_id << 16) | 1138 inti->io.subchannel_nr, 1139 ((__u64)inti->io.io_int_parm << 32) | 1140 inti->io.io_int_word); 1141 list_del(&inti->list); 1142 fi->counters[FIRQ_CNTR_IO] -= 1; 1143 } 1144 if (list_empty(isc_list)) 1145 clear_bit(irq_type, &fi->pending_irqs); 1146 spin_unlock(&fi->lock); 1147 1148 if (inti) { 1149 rc = __do_deliver_io(vcpu, &(inti->io)); 1150 kfree(inti); 1151 goto out; 1152 } 1153 1154 if (gi->origin && gisa_tac_ipm_gisc(gi->origin, isc)) { 1155 /* 1156 * in case an adapter interrupt was not delivered 1157 * in SIE context KVM will handle the delivery 1158 */ 1159 VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc); 1160 memset(&io, 0, sizeof(io)); 1161 io.io_int_word = isc_to_int_word(isc); 1162 vcpu->stat.deliver_io++; 1163 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, 1164 KVM_S390_INT_IO(1, 0, 0, 0), 1165 ((__u32)io.subchannel_id << 16) | 1166 io.subchannel_nr, 1167 ((__u64)io.io_int_parm << 32) | 1168 io.io_int_word); 1169 rc = __do_deliver_io(vcpu, &io); 1170 } 1171out: 1172 return rc; 1173} 1174 1175/* Check whether an external call is pending (deliverable or not) */ 1176int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu) 1177{ 1178 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1179 1180 if (!kvm_s390_use_sca_entries()) 1181 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); 1182 1183 return sca_ext_call_pending(vcpu, NULL); 1184} 1185 1186int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop) 1187{ 1188 if (deliverable_irqs(vcpu)) 1189 return 1; 1190 1191 if (kvm_cpu_has_pending_timer(vcpu)) 1192 return 1; 1193 1194 /* external call pending and deliverable */ 1195 if (kvm_s390_ext_call_pending(vcpu) && 1196 !psw_extint_disabled(vcpu) && 1197 (vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK)) 1198 return 1; 1199 1200 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu)) 1201 return 1; 1202 return 0; 1203} 1204 1205int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) 1206{ 1207 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu); 1208} 1209 1210static u64 __calculate_sltime(struct kvm_vcpu *vcpu) 1211{ 1212 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm); 1213 const u64 ckc = vcpu->arch.sie_block->ckc; 1214 u64 cputm, sltime = 0; 1215 1216 if (ckc_interrupts_enabled(vcpu)) { 1217 if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) { 1218 if ((s64)now < (s64)ckc) 1219 sltime = tod_to_ns((s64)ckc - (s64)now); 1220 } else if (now < ckc) { 1221 sltime = tod_to_ns(ckc - now); 1222 } 1223 /* already expired */ 1224 if (!sltime) 1225 return 0; 1226 if (cpu_timer_interrupts_enabled(vcpu)) { 1227 cputm = kvm_s390_get_cpu_timer(vcpu); 1228 /* already expired? */ 1229 if (cputm >> 63) 1230 return 0; 1231 return min_t(u64, sltime, tod_to_ns(cputm)); 1232 } 1233 } else if (cpu_timer_interrupts_enabled(vcpu)) { 1234 sltime = kvm_s390_get_cpu_timer(vcpu); 1235 /* already expired? */ 1236 if (sltime >> 63) 1237 return 0; 1238 } 1239 return sltime; 1240} 1241 1242int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) 1243{ 1244 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int; 1245 u64 sltime; 1246 1247 vcpu->stat.exit_wait_state++; 1248 1249 /* fast path */ 1250 if (kvm_arch_vcpu_runnable(vcpu)) 1251 return 0; 1252 1253 if (psw_interrupts_disabled(vcpu)) { 1254 VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); 1255 return -EOPNOTSUPP; /* disabled wait */ 1256 } 1257 1258 if (gi->origin && 1259 (gisa_get_ipm_or_restore_iam(gi) & 1260 vcpu->arch.sie_block->gcr[6] >> 24)) 1261 return 0; 1262 1263 if (!ckc_interrupts_enabled(vcpu) && 1264 !cpu_timer_interrupts_enabled(vcpu)) { 1265 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); 1266 __set_cpu_idle(vcpu); 1267 goto no_timer; 1268 } 1269 1270 sltime = __calculate_sltime(vcpu); 1271 if (!sltime) 1272 return 0; 1273 1274 __set_cpu_idle(vcpu); 1275 hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL); 1276 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime); 1277no_timer: 1278 kvm_vcpu_srcu_read_unlock(vcpu); 1279 vcpu->kvm->arch.float_int.last_sleep_cpu = vcpu->vcpu_idx; 1280 kvm_vcpu_halt(vcpu); 1281 vcpu->valid_wakeup = false; 1282 __unset_cpu_idle(vcpu); 1283 kvm_vcpu_srcu_read_lock(vcpu); 1284 1285 hrtimer_cancel(&vcpu->arch.ckc_timer); 1286 return 0; 1287} 1288 1289void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) 1290{ 1291 vcpu->valid_wakeup = true; 1292 kvm_vcpu_wake_up(vcpu); 1293 1294 /* 1295 * The VCPU might not be sleeping but rather executing VSIE. Let's 1296 * kick it, so it leaves the SIE to process the request. 1297 */ 1298 kvm_s390_vsie_kick(vcpu); 1299} 1300 1301enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) 1302{ 1303 struct kvm_vcpu *vcpu; 1304 u64 sltime; 1305 1306 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); 1307 sltime = __calculate_sltime(vcpu); 1308 1309 /* 1310 * If the monotonic clock runs faster than the tod clock we might be 1311 * woken up too early and have to go back to sleep to avoid deadlocks. 1312 */ 1313 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime))) 1314 return HRTIMER_RESTART; 1315 kvm_s390_vcpu_wakeup(vcpu); 1316 return HRTIMER_NORESTART; 1317} 1318 1319void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) 1320{ 1321 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1322 1323 spin_lock(&li->lock); 1324 li->pending_irqs = 0; 1325 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS); 1326 memset(&li->irq, 0, sizeof(li->irq)); 1327 spin_unlock(&li->lock); 1328 1329 sca_clear_ext_call(vcpu); 1330} 1331 1332int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) 1333{ 1334 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1335 int rc = 0; 1336 bool delivered = false; 1337 unsigned long irq_type; 1338 unsigned long irqs; 1339 1340 __reset_intercept_indicators(vcpu); 1341 1342 /* pending ckc conditions might have been invalidated */ 1343 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); 1344 if (ckc_irq_pending(vcpu)) 1345 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); 1346 1347 /* pending cpu timer conditions might have been invalidated */ 1348 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); 1349 if (cpu_timer_irq_pending(vcpu)) 1350 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); 1351 1352 while ((irqs = deliverable_irqs(vcpu)) && !rc) { 1353 /* bits are in the reverse order of interrupt priority */ 1354 irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT); 1355 switch (irq_type) { 1356 case IRQ_PEND_IO_ISC_0: 1357 case IRQ_PEND_IO_ISC_1: 1358 case IRQ_PEND_IO_ISC_2: 1359 case IRQ_PEND_IO_ISC_3: 1360 case IRQ_PEND_IO_ISC_4: 1361 case IRQ_PEND_IO_ISC_5: 1362 case IRQ_PEND_IO_ISC_6: 1363 case IRQ_PEND_IO_ISC_7: 1364 rc = __deliver_io(vcpu, irq_type); 1365 break; 1366 case IRQ_PEND_MCHK_EX: 1367 case IRQ_PEND_MCHK_REP: 1368 rc = __deliver_machine_check(vcpu); 1369 break; 1370 case IRQ_PEND_PROG: 1371 rc = __deliver_prog(vcpu); 1372 break; 1373 case IRQ_PEND_EXT_EMERGENCY: 1374 rc = __deliver_emergency_signal(vcpu); 1375 break; 1376 case IRQ_PEND_EXT_EXTERNAL: 1377 rc = __deliver_external_call(vcpu); 1378 break; 1379 case IRQ_PEND_EXT_CLOCK_COMP: 1380 rc = __deliver_ckc(vcpu); 1381 break; 1382 case IRQ_PEND_EXT_CPU_TIMER: 1383 rc = __deliver_cpu_timer(vcpu); 1384 break; 1385 case IRQ_PEND_RESTART: 1386 rc = __deliver_restart(vcpu); 1387 break; 1388 case IRQ_PEND_SET_PREFIX: 1389 rc = __deliver_set_prefix(vcpu); 1390 break; 1391 case IRQ_PEND_PFAULT_INIT: 1392 rc = __deliver_pfault_init(vcpu); 1393 break; 1394 case IRQ_PEND_EXT_SERVICE: 1395 rc = __deliver_service(vcpu); 1396 break; 1397 case IRQ_PEND_EXT_SERVICE_EV: 1398 rc = __deliver_service_ev(vcpu); 1399 break; 1400 case IRQ_PEND_PFAULT_DONE: 1401 rc = __deliver_pfault_done(vcpu); 1402 break; 1403 case IRQ_PEND_VIRTIO: 1404 rc = __deliver_virtio(vcpu); 1405 break; 1406 default: 1407 WARN_ONCE(1, "Unknown pending irq type %ld", irq_type); 1408 clear_bit(irq_type, &li->pending_irqs); 1409 } 1410 delivered |= !rc; 1411 } 1412 1413 /* 1414 * We delivered at least one interrupt and modified the PC. Force a 1415 * singlestep event now. 1416 */ 1417 if (delivered && guestdbg_sstep_enabled(vcpu)) { 1418 struct kvm_debug_exit_arch *debug_exit = &vcpu->run->debug.arch; 1419 1420 debug_exit->addr = vcpu->arch.sie_block->gpsw.addr; 1421 debug_exit->type = KVM_SINGLESTEP; 1422 vcpu->guest_debug |= KVM_GUESTDBG_EXIT_PENDING; 1423 } 1424 1425 set_intercept_indicators(vcpu); 1426 1427 return rc; 1428} 1429 1430static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 1431{ 1432 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1433 1434 vcpu->stat.inject_program++; 1435 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code); 1436 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, 1437 irq->u.pgm.code, 0); 1438 1439 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) { 1440 /* auto detection if no valid ILC was given */ 1441 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK; 1442 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu); 1443 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID; 1444 } 1445 1446 if (irq->u.pgm.code == PGM_PER) { 1447 li->irq.pgm.code |= PGM_PER; 1448 li->irq.pgm.flags = irq->u.pgm.flags; 1449 /* only modify PER related information */ 1450 li->irq.pgm.per_address = irq->u.pgm.per_address; 1451 li->irq.pgm.per_code = irq->u.pgm.per_code; 1452 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid; 1453 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id; 1454 } else if (!(irq->u.pgm.code & PGM_PER)) { 1455 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) | 1456 irq->u.pgm.code; 1457 li->irq.pgm.flags = irq->u.pgm.flags; 1458 /* only modify non-PER information */ 1459 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code; 1460 li->irq.pgm.mon_code = irq->u.pgm.mon_code; 1461 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code; 1462 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr; 1463 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id; 1464 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id; 1465 } else { 1466 li->irq.pgm = irq->u.pgm; 1467 } 1468 set_bit(IRQ_PEND_PROG, &li->pending_irqs); 1469 return 0; 1470} 1471 1472static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 1473{ 1474 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1475 1476 vcpu->stat.inject_pfault_init++; 1477 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx", 1478 irq->u.ext.ext_params2); 1479 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, 1480 irq->u.ext.ext_params, 1481 irq->u.ext.ext_params2); 1482 1483 li->irq.ext = irq->u.ext; 1484 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); 1485 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); 1486 return 0; 1487} 1488 1489static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 1490{ 1491 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1492 struct kvm_s390_extcall_info *extcall = &li->irq.extcall; 1493 uint16_t src_id = irq->u.extcall.code; 1494 1495 vcpu->stat.inject_external_call++; 1496 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u", 1497 src_id); 1498 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, 1499 src_id, 0); 1500 1501 /* sending vcpu invalid */ 1502 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL) 1503 return -EINVAL; 1504 1505 if (kvm_s390_use_sca_entries() && !kvm_s390_pv_cpu_get_handle(vcpu)) 1506 return sca_inject_ext_call(vcpu, src_id); 1507 1508 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs)) 1509 return -EBUSY; 1510 *extcall = irq->u.extcall; 1511 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); 1512 return 0; 1513} 1514 1515static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 1516{ 1517 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1518 struct kvm_s390_prefix_info *prefix = &li->irq.prefix; 1519 1520 vcpu->stat.inject_set_prefix++; 1521 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x", 1522 irq->u.prefix.address); 1523 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, 1524 irq->u.prefix.address, 0); 1525 1526 if (!is_vcpu_stopped(vcpu)) 1527 return -EBUSY; 1528 1529 *prefix = irq->u.prefix; 1530 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); 1531 return 0; 1532} 1533 1534#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS) 1535static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 1536{ 1537 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1538 struct kvm_s390_stop_info *stop = &li->irq.stop; 1539 int rc = 0; 1540 1541 vcpu->stat.inject_stop_signal++; 1542 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0); 1543 1544 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) 1545 return -EINVAL; 1546 1547 if (is_vcpu_stopped(vcpu)) { 1548 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS) 1549 rc = kvm_s390_store_status_unloaded(vcpu, 1550 KVM_S390_STORE_STATUS_NOADDR); 1551 return rc; 1552 } 1553 1554 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs)) 1555 return -EBUSY; 1556 stop->flags = irq->u.stop.flags; 1557 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT); 1558 return 0; 1559} 1560 1561static int __inject_sigp_restart(struct kvm_vcpu *vcpu) 1562{ 1563 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1564 1565 vcpu->stat.inject_restart++; 1566 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int"); 1567 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); 1568 1569 set_bit(IRQ_PEND_RESTART, &li->pending_irqs); 1570 return 0; 1571} 1572 1573static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, 1574 struct kvm_s390_irq *irq) 1575{ 1576 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1577 1578 vcpu->stat.inject_emergency_signal++; 1579 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u", 1580 irq->u.emerg.code); 1581 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, 1582 irq->u.emerg.code, 0); 1583 1584 /* sending vcpu invalid */ 1585 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL) 1586 return -EINVAL; 1587 1588 set_bit(irq->u.emerg.code, li->sigp_emerg_pending); 1589 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); 1590 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); 1591 return 0; 1592} 1593 1594static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 1595{ 1596 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1597 struct kvm_s390_mchk_info *mchk = &li->irq.mchk; 1598 1599 vcpu->stat.inject_mchk++; 1600 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx", 1601 irq->u.mchk.mcic); 1602 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, 1603 irq->u.mchk.mcic); 1604 1605 /* 1606 * Because repressible machine checks can be indicated along with 1607 * exigent machine checks (PoP, Chapter 11, Interruption action) 1608 * we need to combine cr14, mcic and external damage code. 1609 * Failing storage address and the logout area should not be or'ed 1610 * together, we just indicate the last occurrence of the corresponding 1611 * machine check 1612 */ 1613 mchk->cr14 |= irq->u.mchk.cr14; 1614 mchk->mcic |= irq->u.mchk.mcic; 1615 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code; 1616 mchk->failing_storage_address = irq->u.mchk.failing_storage_address; 1617 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout, 1618 sizeof(mchk->fixed_logout)); 1619 if (mchk->mcic & MCHK_EX_MASK) 1620 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); 1621 else if (mchk->mcic & MCHK_REP_MASK) 1622 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); 1623 return 0; 1624} 1625 1626static int __inject_ckc(struct kvm_vcpu *vcpu) 1627{ 1628 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1629 1630 vcpu->stat.inject_ckc++; 1631 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external"); 1632 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, 1633 0, 0); 1634 1635 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); 1636 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); 1637 return 0; 1638} 1639 1640static int __inject_cpu_timer(struct kvm_vcpu *vcpu) 1641{ 1642 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 1643 1644 vcpu->stat.inject_cputm++; 1645 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external"); 1646 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, 1647 0, 0); 1648 1649 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); 1650 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); 1651 return 0; 1652} 1653 1654static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm, 1655 int isc, u32 schid) 1656{ 1657 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 1658 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; 1659 struct kvm_s390_interrupt_info *iter; 1660 u16 id = (schid & 0xffff0000U) >> 16; 1661 u16 nr = schid & 0x0000ffffU; 1662 1663 spin_lock(&fi->lock); 1664 list_for_each_entry(iter, isc_list, list) { 1665 if (schid && (id != iter->io.subchannel_id || 1666 nr != iter->io.subchannel_nr)) 1667 continue; 1668 /* found an appropriate entry */ 1669 list_del_init(&iter->list); 1670 fi->counters[FIRQ_CNTR_IO] -= 1; 1671 if (list_empty(isc_list)) 1672 clear_bit(isc_to_irq_type(isc), &fi->pending_irqs); 1673 spin_unlock(&fi->lock); 1674 return iter; 1675 } 1676 spin_unlock(&fi->lock); 1677 return NULL; 1678} 1679 1680static struct kvm_s390_interrupt_info *get_top_io_int(struct kvm *kvm, 1681 u64 isc_mask, u32 schid) 1682{ 1683 struct kvm_s390_interrupt_info *inti = NULL; 1684 int isc; 1685 1686 for (isc = 0; isc <= MAX_ISC && !inti; isc++) { 1687 if (isc_mask & isc_to_isc_bits(isc)) 1688 inti = get_io_int(kvm, isc, schid); 1689 } 1690 return inti; 1691} 1692 1693static int get_top_gisa_isc(struct kvm *kvm, u64 isc_mask, u32 schid) 1694{ 1695 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 1696 unsigned long active_mask; 1697 int isc; 1698 1699 if (schid) 1700 goto out; 1701 if (!gi->origin) 1702 goto out; 1703 1704 active_mask = (isc_mask & gisa_get_ipm(gi->origin) << 24) << 32; 1705 while (active_mask) { 1706 isc = __fls(active_mask) ^ (BITS_PER_LONG - 1); 1707 if (gisa_tac_ipm_gisc(gi->origin, isc)) 1708 return isc; 1709 clear_bit_inv(isc, &active_mask); 1710 } 1711out: 1712 return -EINVAL; 1713} 1714 1715/* 1716 * Dequeue and return an I/O interrupt matching any of the interruption 1717 * subclasses as designated by the isc mask in cr6 and the schid (if != 0). 1718 * Take into account the interrupts pending in the interrupt list and in GISA. 1719 * 1720 * Note that for a guest that does not enable I/O interrupts 1721 * but relies on TPI, a flood of classic interrupts may starve 1722 * out adapter interrupts on the same isc. Linux does not do 1723 * that, and it is possible to work around the issue by configuring 1724 * different iscs for classic and adapter interrupts in the guest, 1725 * but we may want to revisit this in the future. 1726 */ 1727struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, 1728 u64 isc_mask, u32 schid) 1729{ 1730 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 1731 struct kvm_s390_interrupt_info *inti, *tmp_inti; 1732 int isc; 1733 1734 inti = get_top_io_int(kvm, isc_mask, schid); 1735 1736 isc = get_top_gisa_isc(kvm, isc_mask, schid); 1737 if (isc < 0) 1738 /* no AI in GISA */ 1739 goto out; 1740 1741 if (!inti) 1742 /* AI in GISA but no classical IO int */ 1743 goto gisa_out; 1744 1745 /* both types of interrupts present */ 1746 if (int_word_to_isc(inti->io.io_int_word) <= isc) { 1747 /* classical IO int with higher priority */ 1748 gisa_set_ipm_gisc(gi->origin, isc); 1749 goto out; 1750 } 1751gisa_out: 1752 tmp_inti = kzalloc(sizeof(*inti), GFP_KERNEL_ACCOUNT); 1753 if (tmp_inti) { 1754 tmp_inti->type = KVM_S390_INT_IO(1, 0, 0, 0); 1755 tmp_inti->io.io_int_word = isc_to_int_word(isc); 1756 if (inti) 1757 kvm_s390_reinject_io_int(kvm, inti); 1758 inti = tmp_inti; 1759 } else 1760 gisa_set_ipm_gisc(gi->origin, isc); 1761out: 1762 return inti; 1763} 1764 1765static int __inject_service(struct kvm *kvm, 1766 struct kvm_s390_interrupt_info *inti) 1767{ 1768 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 1769 1770 kvm->stat.inject_service_signal++; 1771 spin_lock(&fi->lock); 1772 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING; 1773 1774 /* We always allow events, track them separately from the sccb ints */ 1775 if (fi->srv_signal.ext_params & SCCB_EVENT_PENDING) 1776 set_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs); 1777 1778 /* 1779 * Early versions of the QEMU s390 bios will inject several 1780 * service interrupts after another without handling a 1781 * condition code indicating busy. 1782 * We will silently ignore those superfluous sccb values. 1783 * A future version of QEMU will take care of serialization 1784 * of servc requests 1785 */ 1786 if (fi->srv_signal.ext_params & SCCB_MASK) 1787 goto out; 1788 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK; 1789 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); 1790out: 1791 spin_unlock(&fi->lock); 1792 kfree(inti); 1793 return 0; 1794} 1795 1796static int __inject_virtio(struct kvm *kvm, 1797 struct kvm_s390_interrupt_info *inti) 1798{ 1799 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 1800 1801 kvm->stat.inject_virtio++; 1802 spin_lock(&fi->lock); 1803 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) { 1804 spin_unlock(&fi->lock); 1805 return -EBUSY; 1806 } 1807 fi->counters[FIRQ_CNTR_VIRTIO] += 1; 1808 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]); 1809 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); 1810 spin_unlock(&fi->lock); 1811 return 0; 1812} 1813 1814static int __inject_pfault_done(struct kvm *kvm, 1815 struct kvm_s390_interrupt_info *inti) 1816{ 1817 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 1818 1819 kvm->stat.inject_pfault_done++; 1820 spin_lock(&fi->lock); 1821 if (fi->counters[FIRQ_CNTR_PFAULT] >= 1822 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) { 1823 spin_unlock(&fi->lock); 1824 return -EBUSY; 1825 } 1826 fi->counters[FIRQ_CNTR_PFAULT] += 1; 1827 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]); 1828 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); 1829 spin_unlock(&fi->lock); 1830 return 0; 1831} 1832 1833#define CR_PENDING_SUBCLASS 28 1834static int __inject_float_mchk(struct kvm *kvm, 1835 struct kvm_s390_interrupt_info *inti) 1836{ 1837 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 1838 1839 kvm->stat.inject_float_mchk++; 1840 spin_lock(&fi->lock); 1841 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS); 1842 fi->mchk.mcic |= inti->mchk.mcic; 1843 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs); 1844 spin_unlock(&fi->lock); 1845 kfree(inti); 1846 return 0; 1847} 1848 1849static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) 1850{ 1851 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 1852 struct kvm_s390_float_interrupt *fi; 1853 struct list_head *list; 1854 int isc; 1855 1856 kvm->stat.inject_io++; 1857 isc = int_word_to_isc(inti->io.io_int_word); 1858 1859 /* 1860 * We do not use the lock checking variant as this is just a 1861 * performance optimization and we do not hold the lock here. 1862 * This is ok as the code will pick interrupts from both "lists" 1863 * for delivery. 1864 */ 1865 if (gi->origin && inti->type & KVM_S390_INT_IO_AI_MASK) { 1866 VM_EVENT(kvm, 4, "%s isc %1u", "inject: I/O (AI/gisa)", isc); 1867 gisa_set_ipm_gisc(gi->origin, isc); 1868 kfree(inti); 1869 return 0; 1870 } 1871 1872 fi = &kvm->arch.float_int; 1873 spin_lock(&fi->lock); 1874 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) { 1875 spin_unlock(&fi->lock); 1876 return -EBUSY; 1877 } 1878 fi->counters[FIRQ_CNTR_IO] += 1; 1879 1880 if (inti->type & KVM_S390_INT_IO_AI_MASK) 1881 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)"); 1882 else 1883 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x", 1884 inti->io.subchannel_id >> 8, 1885 inti->io.subchannel_id >> 1 & 0x3, 1886 inti->io.subchannel_nr); 1887 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; 1888 list_add_tail(&inti->list, list); 1889 set_bit(isc_to_irq_type(isc), &fi->pending_irqs); 1890 spin_unlock(&fi->lock); 1891 return 0; 1892} 1893 1894/* 1895 * Find a destination VCPU for a floating irq and kick it. 1896 */ 1897static void __floating_irq_kick(struct kvm *kvm, u64 type) 1898{ 1899 struct kvm_vcpu *dst_vcpu; 1900 int sigcpu, online_vcpus, nr_tries = 0; 1901 1902 online_vcpus = atomic_read(&kvm->online_vcpus); 1903 if (!online_vcpus) 1904 return; 1905 1906 for (sigcpu = kvm->arch.float_int.last_sleep_cpu; ; sigcpu++) { 1907 sigcpu %= online_vcpus; 1908 dst_vcpu = kvm_get_vcpu(kvm, sigcpu); 1909 if (!is_vcpu_stopped(dst_vcpu)) 1910 break; 1911 /* avoid endless loops if all vcpus are stopped */ 1912 if (nr_tries++ >= online_vcpus) 1913 return; 1914 } 1915 1916 /* make the VCPU drop out of the SIE, or wake it up if sleeping */ 1917 switch (type) { 1918 case KVM_S390_MCHK: 1919 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT); 1920 break; 1921 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: 1922 if (!(type & KVM_S390_INT_IO_AI_MASK && 1923 kvm->arch.gisa_int.origin) || 1924 kvm_s390_pv_cpu_get_handle(dst_vcpu)) 1925 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT); 1926 break; 1927 default: 1928 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT); 1929 break; 1930 } 1931 kvm_s390_vcpu_wakeup(dst_vcpu); 1932} 1933 1934static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) 1935{ 1936 u64 type = READ_ONCE(inti->type); 1937 int rc; 1938 1939 switch (type) { 1940 case KVM_S390_MCHK: 1941 rc = __inject_float_mchk(kvm, inti); 1942 break; 1943 case KVM_S390_INT_VIRTIO: 1944 rc = __inject_virtio(kvm, inti); 1945 break; 1946 case KVM_S390_INT_SERVICE: 1947 rc = __inject_service(kvm, inti); 1948 break; 1949 case KVM_S390_INT_PFAULT_DONE: 1950 rc = __inject_pfault_done(kvm, inti); 1951 break; 1952 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: 1953 rc = __inject_io(kvm, inti); 1954 break; 1955 default: 1956 rc = -EINVAL; 1957 } 1958 if (rc) 1959 return rc; 1960 1961 __floating_irq_kick(kvm, type); 1962 return 0; 1963} 1964 1965int kvm_s390_inject_vm(struct kvm *kvm, 1966 struct kvm_s390_interrupt *s390int) 1967{ 1968 struct kvm_s390_interrupt_info *inti; 1969 int rc; 1970 1971 inti = kzalloc(sizeof(*inti), GFP_KERNEL_ACCOUNT); 1972 if (!inti) 1973 return -ENOMEM; 1974 1975 inti->type = s390int->type; 1976 switch (inti->type) { 1977 case KVM_S390_INT_VIRTIO: 1978 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", 1979 s390int->parm, s390int->parm64); 1980 inti->ext.ext_params = s390int->parm; 1981 inti->ext.ext_params2 = s390int->parm64; 1982 break; 1983 case KVM_S390_INT_SERVICE: 1984 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm); 1985 inti->ext.ext_params = s390int->parm; 1986 break; 1987 case KVM_S390_INT_PFAULT_DONE: 1988 inti->ext.ext_params2 = s390int->parm64; 1989 break; 1990 case KVM_S390_MCHK: 1991 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx", 1992 s390int->parm64); 1993 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ 1994 inti->mchk.mcic = s390int->parm64; 1995 break; 1996 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: 1997 inti->io.subchannel_id = s390int->parm >> 16; 1998 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; 1999 inti->io.io_int_parm = s390int->parm64 >> 32; 2000 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; 2001 break; 2002 default: 2003 kfree(inti); 2004 return -EINVAL; 2005 } 2006 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, 2007 2); 2008 2009 rc = __inject_vm(kvm, inti); 2010 if (rc) 2011 kfree(inti); 2012 return rc; 2013} 2014 2015int kvm_s390_reinject_io_int(struct kvm *kvm, 2016 struct kvm_s390_interrupt_info *inti) 2017{ 2018 return __inject_vm(kvm, inti); 2019} 2020 2021int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, 2022 struct kvm_s390_irq *irq) 2023{ 2024 irq->type = s390int->type; 2025 switch (irq->type) { 2026 case KVM_S390_PROGRAM_INT: 2027 if (s390int->parm & 0xffff0000) 2028 return -EINVAL; 2029 irq->u.pgm.code = s390int->parm; 2030 break; 2031 case KVM_S390_SIGP_SET_PREFIX: 2032 irq->u.prefix.address = s390int->parm; 2033 break; 2034 case KVM_S390_SIGP_STOP: 2035 irq->u.stop.flags = s390int->parm; 2036 break; 2037 case KVM_S390_INT_EXTERNAL_CALL: 2038 if (s390int->parm & 0xffff0000) 2039 return -EINVAL; 2040 irq->u.extcall.code = s390int->parm; 2041 break; 2042 case KVM_S390_INT_EMERGENCY: 2043 if (s390int->parm & 0xffff0000) 2044 return -EINVAL; 2045 irq->u.emerg.code = s390int->parm; 2046 break; 2047 case KVM_S390_MCHK: 2048 irq->u.mchk.mcic = s390int->parm64; 2049 break; 2050 case KVM_S390_INT_PFAULT_INIT: 2051 irq->u.ext.ext_params = s390int->parm; 2052 irq->u.ext.ext_params2 = s390int->parm64; 2053 break; 2054 case KVM_S390_RESTART: 2055 case KVM_S390_INT_CLOCK_COMP: 2056 case KVM_S390_INT_CPU_TIMER: 2057 break; 2058 default: 2059 return -EINVAL; 2060 } 2061 return 0; 2062} 2063 2064int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu) 2065{ 2066 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 2067 2068 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); 2069} 2070 2071int kvm_s390_is_restart_irq_pending(struct kvm_vcpu *vcpu) 2072{ 2073 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 2074 2075 return test_bit(IRQ_PEND_RESTART, &li->pending_irqs); 2076} 2077 2078void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu) 2079{ 2080 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 2081 2082 spin_lock(&li->lock); 2083 li->irq.stop.flags = 0; 2084 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); 2085 spin_unlock(&li->lock); 2086} 2087 2088static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 2089{ 2090 int rc; 2091 2092 switch (irq->type) { 2093 case KVM_S390_PROGRAM_INT: 2094 rc = __inject_prog(vcpu, irq); 2095 break; 2096 case KVM_S390_SIGP_SET_PREFIX: 2097 rc = __inject_set_prefix(vcpu, irq); 2098 break; 2099 case KVM_S390_SIGP_STOP: 2100 rc = __inject_sigp_stop(vcpu, irq); 2101 break; 2102 case KVM_S390_RESTART: 2103 rc = __inject_sigp_restart(vcpu); 2104 break; 2105 case KVM_S390_INT_CLOCK_COMP: 2106 rc = __inject_ckc(vcpu); 2107 break; 2108 case KVM_S390_INT_CPU_TIMER: 2109 rc = __inject_cpu_timer(vcpu); 2110 break; 2111 case KVM_S390_INT_EXTERNAL_CALL: 2112 rc = __inject_extcall(vcpu, irq); 2113 break; 2114 case KVM_S390_INT_EMERGENCY: 2115 rc = __inject_sigp_emergency(vcpu, irq); 2116 break; 2117 case KVM_S390_MCHK: 2118 rc = __inject_mchk(vcpu, irq); 2119 break; 2120 case KVM_S390_INT_PFAULT_INIT: 2121 rc = __inject_pfault_init(vcpu, irq); 2122 break; 2123 case KVM_S390_INT_VIRTIO: 2124 case KVM_S390_INT_SERVICE: 2125 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: 2126 default: 2127 rc = -EINVAL; 2128 } 2129 2130 return rc; 2131} 2132 2133int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 2134{ 2135 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 2136 int rc; 2137 2138 spin_lock(&li->lock); 2139 rc = do_inject_vcpu(vcpu, irq); 2140 spin_unlock(&li->lock); 2141 if (!rc) 2142 kvm_s390_vcpu_wakeup(vcpu); 2143 return rc; 2144} 2145 2146static inline void clear_irq_list(struct list_head *_list) 2147{ 2148 struct kvm_s390_interrupt_info *inti, *n; 2149 2150 list_for_each_entry_safe(inti, n, _list, list) { 2151 list_del(&inti->list); 2152 kfree(inti); 2153 } 2154} 2155 2156static void inti_to_irq(struct kvm_s390_interrupt_info *inti, 2157 struct kvm_s390_irq *irq) 2158{ 2159 irq->type = inti->type; 2160 switch (inti->type) { 2161 case KVM_S390_INT_PFAULT_INIT: 2162 case KVM_S390_INT_PFAULT_DONE: 2163 case KVM_S390_INT_VIRTIO: 2164 irq->u.ext = inti->ext; 2165 break; 2166 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: 2167 irq->u.io = inti->io; 2168 break; 2169 } 2170} 2171 2172void kvm_s390_clear_float_irqs(struct kvm *kvm) 2173{ 2174 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 2175 int i; 2176 2177 mutex_lock(&kvm->lock); 2178 if (!kvm_s390_pv_is_protected(kvm)) 2179 fi->masked_irqs = 0; 2180 mutex_unlock(&kvm->lock); 2181 spin_lock(&fi->lock); 2182 fi->pending_irqs = 0; 2183 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal)); 2184 memset(&fi->mchk, 0, sizeof(fi->mchk)); 2185 for (i = 0; i < FIRQ_LIST_COUNT; i++) 2186 clear_irq_list(&fi->lists[i]); 2187 for (i = 0; i < FIRQ_MAX_COUNT; i++) 2188 fi->counters[i] = 0; 2189 spin_unlock(&fi->lock); 2190 kvm_s390_gisa_clear(kvm); 2191}; 2192 2193static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len) 2194{ 2195 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 2196 struct kvm_s390_interrupt_info *inti; 2197 struct kvm_s390_float_interrupt *fi; 2198 struct kvm_s390_irq *buf; 2199 struct kvm_s390_irq *irq; 2200 int max_irqs; 2201 int ret = 0; 2202 int n = 0; 2203 int i; 2204 2205 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0) 2206 return -EINVAL; 2207 2208 /* 2209 * We are already using -ENOMEM to signal 2210 * userspace it may retry with a bigger buffer, 2211 * so we need to use something else for this case 2212 */ 2213 buf = vzalloc(len); 2214 if (!buf) 2215 return -ENOBUFS; 2216 2217 max_irqs = len / sizeof(struct kvm_s390_irq); 2218 2219 if (gi->origin && gisa_get_ipm(gi->origin)) { 2220 for (i = 0; i <= MAX_ISC; i++) { 2221 if (n == max_irqs) { 2222 /* signal userspace to try again */ 2223 ret = -ENOMEM; 2224 goto out_nolock; 2225 } 2226 if (gisa_tac_ipm_gisc(gi->origin, i)) { 2227 irq = (struct kvm_s390_irq *) &buf[n]; 2228 irq->type = KVM_S390_INT_IO(1, 0, 0, 0); 2229 irq->u.io.io_int_word = isc_to_int_word(i); 2230 n++; 2231 } 2232 } 2233 } 2234 fi = &kvm->arch.float_int; 2235 spin_lock(&fi->lock); 2236 for (i = 0; i < FIRQ_LIST_COUNT; i++) { 2237 list_for_each_entry(inti, &fi->lists[i], list) { 2238 if (n == max_irqs) { 2239 /* signal userspace to try again */ 2240 ret = -ENOMEM; 2241 goto out; 2242 } 2243 inti_to_irq(inti, &buf[n]); 2244 n++; 2245 } 2246 } 2247 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs) || 2248 test_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs)) { 2249 if (n == max_irqs) { 2250 /* signal userspace to try again */ 2251 ret = -ENOMEM; 2252 goto out; 2253 } 2254 irq = (struct kvm_s390_irq *) &buf[n]; 2255 irq->type = KVM_S390_INT_SERVICE; 2256 irq->u.ext = fi->srv_signal; 2257 n++; 2258 } 2259 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { 2260 if (n == max_irqs) { 2261 /* signal userspace to try again */ 2262 ret = -ENOMEM; 2263 goto out; 2264 } 2265 irq = (struct kvm_s390_irq *) &buf[n]; 2266 irq->type = KVM_S390_MCHK; 2267 irq->u.mchk = fi->mchk; 2268 n++; 2269} 2270 2271out: 2272 spin_unlock(&fi->lock); 2273out_nolock: 2274 if (!ret && n > 0) { 2275 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n)) 2276 ret = -EFAULT; 2277 } 2278 vfree(buf); 2279 2280 return ret < 0 ? ret : n; 2281} 2282 2283static int flic_ais_mode_get_all(struct kvm *kvm, struct kvm_device_attr *attr) 2284{ 2285 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 2286 struct kvm_s390_ais_all ais; 2287 2288 if (attr->attr < sizeof(ais)) 2289 return -EINVAL; 2290 2291 if (!test_kvm_facility(kvm, 72)) 2292 return -EOPNOTSUPP; 2293 2294 mutex_lock(&fi->ais_lock); 2295 ais.simm = fi->simm; 2296 ais.nimm = fi->nimm; 2297 mutex_unlock(&fi->ais_lock); 2298 2299 if (copy_to_user((void __user *)attr->addr, &ais, sizeof(ais))) 2300 return -EFAULT; 2301 2302 return 0; 2303} 2304 2305static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) 2306{ 2307 int r; 2308 2309 switch (attr->group) { 2310 case KVM_DEV_FLIC_GET_ALL_IRQS: 2311 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr, 2312 attr->attr); 2313 break; 2314 case KVM_DEV_FLIC_AISM_ALL: 2315 r = flic_ais_mode_get_all(dev->kvm, attr); 2316 break; 2317 default: 2318 r = -EINVAL; 2319 } 2320 2321 return r; 2322} 2323 2324static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, 2325 u64 addr) 2326{ 2327 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; 2328 void *target = NULL; 2329 void __user *source; 2330 u64 size; 2331 2332 if (get_user(inti->type, (u64 __user *)addr)) 2333 return -EFAULT; 2334 2335 switch (inti->type) { 2336 case KVM_S390_INT_PFAULT_INIT: 2337 case KVM_S390_INT_PFAULT_DONE: 2338 case KVM_S390_INT_VIRTIO: 2339 case KVM_S390_INT_SERVICE: 2340 target = (void *) &inti->ext; 2341 source = &uptr->u.ext; 2342 size = sizeof(inti->ext); 2343 break; 2344 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: 2345 target = (void *) &inti->io; 2346 source = &uptr->u.io; 2347 size = sizeof(inti->io); 2348 break; 2349 case KVM_S390_MCHK: 2350 target = (void *) &inti->mchk; 2351 source = &uptr->u.mchk; 2352 size = sizeof(inti->mchk); 2353 break; 2354 default: 2355 return -EINVAL; 2356 } 2357 2358 if (copy_from_user(target, source, size)) 2359 return -EFAULT; 2360 2361 return 0; 2362} 2363 2364static int enqueue_floating_irq(struct kvm_device *dev, 2365 struct kvm_device_attr *attr) 2366{ 2367 struct kvm_s390_interrupt_info *inti = NULL; 2368 int r = 0; 2369 int len = attr->attr; 2370 2371 if (len % sizeof(struct kvm_s390_irq) != 0) 2372 return -EINVAL; 2373 else if (len > KVM_S390_FLIC_MAX_BUFFER) 2374 return -EINVAL; 2375 2376 while (len >= sizeof(struct kvm_s390_irq)) { 2377 inti = kzalloc(sizeof(*inti), GFP_KERNEL_ACCOUNT); 2378 if (!inti) 2379 return -ENOMEM; 2380 2381 r = copy_irq_from_user(inti, attr->addr); 2382 if (r) { 2383 kfree(inti); 2384 return r; 2385 } 2386 r = __inject_vm(dev->kvm, inti); 2387 if (r) { 2388 kfree(inti); 2389 return r; 2390 } 2391 len -= sizeof(struct kvm_s390_irq); 2392 attr->addr += sizeof(struct kvm_s390_irq); 2393 } 2394 2395 return r; 2396} 2397 2398static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) 2399{ 2400 if (id >= MAX_S390_IO_ADAPTERS) 2401 return NULL; 2402 id = array_index_nospec(id, MAX_S390_IO_ADAPTERS); 2403 return kvm->arch.adapters[id]; 2404} 2405 2406static int register_io_adapter(struct kvm_device *dev, 2407 struct kvm_device_attr *attr) 2408{ 2409 struct s390_io_adapter *adapter; 2410 struct kvm_s390_io_adapter adapter_info; 2411 2412 if (copy_from_user(&adapter_info, 2413 (void __user *)attr->addr, sizeof(adapter_info))) 2414 return -EFAULT; 2415 2416 if (adapter_info.id >= MAX_S390_IO_ADAPTERS) 2417 return -EINVAL; 2418 2419 adapter_info.id = array_index_nospec(adapter_info.id, 2420 MAX_S390_IO_ADAPTERS); 2421 2422 if (dev->kvm->arch.adapters[adapter_info.id] != NULL) 2423 return -EINVAL; 2424 2425 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL_ACCOUNT); 2426 if (!adapter) 2427 return -ENOMEM; 2428 2429 adapter->id = adapter_info.id; 2430 adapter->isc = adapter_info.isc; 2431 adapter->maskable = adapter_info.maskable; 2432 adapter->masked = false; 2433 adapter->swap = adapter_info.swap; 2434 adapter->suppressible = (adapter_info.flags) & 2435 KVM_S390_ADAPTER_SUPPRESSIBLE; 2436 dev->kvm->arch.adapters[adapter->id] = adapter; 2437 2438 return 0; 2439} 2440 2441int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) 2442{ 2443 int ret; 2444 struct s390_io_adapter *adapter = get_io_adapter(kvm, id); 2445 2446 if (!adapter || !adapter->maskable) 2447 return -EINVAL; 2448 ret = adapter->masked; 2449 adapter->masked = masked; 2450 return ret; 2451} 2452 2453void kvm_s390_destroy_adapters(struct kvm *kvm) 2454{ 2455 int i; 2456 2457 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) 2458 kfree(kvm->arch.adapters[i]); 2459} 2460 2461static int modify_io_adapter(struct kvm_device *dev, 2462 struct kvm_device_attr *attr) 2463{ 2464 struct kvm_s390_io_adapter_req req; 2465 struct s390_io_adapter *adapter; 2466 int ret; 2467 2468 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) 2469 return -EFAULT; 2470 2471 adapter = get_io_adapter(dev->kvm, req.id); 2472 if (!adapter) 2473 return -EINVAL; 2474 switch (req.type) { 2475 case KVM_S390_IO_ADAPTER_MASK: 2476 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); 2477 if (ret > 0) 2478 ret = 0; 2479 break; 2480 /* 2481 * The following operations are no longer needed and therefore no-ops. 2482 * The gpa to hva translation is done when an IRQ route is set up. The 2483 * set_irq code uses get_user_pages_remote() to do the actual write. 2484 */ 2485 case KVM_S390_IO_ADAPTER_MAP: 2486 case KVM_S390_IO_ADAPTER_UNMAP: 2487 ret = 0; 2488 break; 2489 default: 2490 ret = -EINVAL; 2491 } 2492 2493 return ret; 2494} 2495 2496static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr) 2497 2498{ 2499 const u64 isc_mask = 0xffUL << 24; /* all iscs set */ 2500 u32 schid; 2501 2502 if (attr->flags) 2503 return -EINVAL; 2504 if (attr->attr != sizeof(schid)) 2505 return -EINVAL; 2506 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid))) 2507 return -EFAULT; 2508 if (!schid) 2509 return -EINVAL; 2510 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid)); 2511 /* 2512 * If userspace is conforming to the architecture, we can have at most 2513 * one pending I/O interrupt per subchannel, so this is effectively a 2514 * clear all. 2515 */ 2516 return 0; 2517} 2518 2519static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr) 2520{ 2521 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 2522 struct kvm_s390_ais_req req; 2523 int ret = 0; 2524 2525 if (!test_kvm_facility(kvm, 72)) 2526 return -EOPNOTSUPP; 2527 2528 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) 2529 return -EFAULT; 2530 2531 if (req.isc > MAX_ISC) 2532 return -EINVAL; 2533 2534 trace_kvm_s390_modify_ais_mode(req.isc, 2535 (fi->simm & AIS_MODE_MASK(req.isc)) ? 2536 (fi->nimm & AIS_MODE_MASK(req.isc)) ? 2537 2 : KVM_S390_AIS_MODE_SINGLE : 2538 KVM_S390_AIS_MODE_ALL, req.mode); 2539 2540 mutex_lock(&fi->ais_lock); 2541 switch (req.mode) { 2542 case KVM_S390_AIS_MODE_ALL: 2543 fi->simm &= ~AIS_MODE_MASK(req.isc); 2544 fi->nimm &= ~AIS_MODE_MASK(req.isc); 2545 break; 2546 case KVM_S390_AIS_MODE_SINGLE: 2547 fi->simm |= AIS_MODE_MASK(req.isc); 2548 fi->nimm &= ~AIS_MODE_MASK(req.isc); 2549 break; 2550 default: 2551 ret = -EINVAL; 2552 } 2553 mutex_unlock(&fi->ais_lock); 2554 2555 return ret; 2556} 2557 2558static int kvm_s390_inject_airq(struct kvm *kvm, 2559 struct s390_io_adapter *adapter) 2560{ 2561 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 2562 struct kvm_s390_interrupt s390int = { 2563 .type = KVM_S390_INT_IO(1, 0, 0, 0), 2564 .parm = 0, 2565 .parm64 = isc_to_int_word(adapter->isc), 2566 }; 2567 int ret = 0; 2568 2569 if (!test_kvm_facility(kvm, 72) || !adapter->suppressible) 2570 return kvm_s390_inject_vm(kvm, &s390int); 2571 2572 mutex_lock(&fi->ais_lock); 2573 if (fi->nimm & AIS_MODE_MASK(adapter->isc)) { 2574 trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc); 2575 goto out; 2576 } 2577 2578 ret = kvm_s390_inject_vm(kvm, &s390int); 2579 if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) { 2580 fi->nimm |= AIS_MODE_MASK(adapter->isc); 2581 trace_kvm_s390_modify_ais_mode(adapter->isc, 2582 KVM_S390_AIS_MODE_SINGLE, 2); 2583 } 2584out: 2585 mutex_unlock(&fi->ais_lock); 2586 return ret; 2587} 2588 2589static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr) 2590{ 2591 unsigned int id = attr->attr; 2592 struct s390_io_adapter *adapter = get_io_adapter(kvm, id); 2593 2594 if (!adapter) 2595 return -EINVAL; 2596 2597 return kvm_s390_inject_airq(kvm, adapter); 2598} 2599 2600static int flic_ais_mode_set_all(struct kvm *kvm, struct kvm_device_attr *attr) 2601{ 2602 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; 2603 struct kvm_s390_ais_all ais; 2604 2605 if (!test_kvm_facility(kvm, 72)) 2606 return -EOPNOTSUPP; 2607 2608 if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais))) 2609 return -EFAULT; 2610 2611 mutex_lock(&fi->ais_lock); 2612 fi->simm = ais.simm; 2613 fi->nimm = ais.nimm; 2614 mutex_unlock(&fi->ais_lock); 2615 2616 return 0; 2617} 2618 2619static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) 2620{ 2621 int r = 0; 2622 unsigned long i; 2623 struct kvm_vcpu *vcpu; 2624 2625 switch (attr->group) { 2626 case KVM_DEV_FLIC_ENQUEUE: 2627 r = enqueue_floating_irq(dev, attr); 2628 break; 2629 case KVM_DEV_FLIC_CLEAR_IRQS: 2630 kvm_s390_clear_float_irqs(dev->kvm); 2631 break; 2632 case KVM_DEV_FLIC_APF_ENABLE: 2633 if (kvm_is_ucontrol(dev->kvm)) 2634 return -EINVAL; 2635 dev->kvm->arch.gmap->pfault_enabled = 1; 2636 break; 2637 case KVM_DEV_FLIC_APF_DISABLE_WAIT: 2638 if (kvm_is_ucontrol(dev->kvm)) 2639 return -EINVAL; 2640 dev->kvm->arch.gmap->pfault_enabled = 0; 2641 /* 2642 * Make sure no async faults are in transition when 2643 * clearing the queues. So we don't need to worry 2644 * about late coming workers. 2645 */ 2646 synchronize_srcu(&dev->kvm->srcu); 2647 kvm_for_each_vcpu(i, vcpu, dev->kvm) 2648 kvm_clear_async_pf_completion_queue(vcpu); 2649 break; 2650 case KVM_DEV_FLIC_ADAPTER_REGISTER: 2651 r = register_io_adapter(dev, attr); 2652 break; 2653 case KVM_DEV_FLIC_ADAPTER_MODIFY: 2654 r = modify_io_adapter(dev, attr); 2655 break; 2656 case KVM_DEV_FLIC_CLEAR_IO_IRQ: 2657 r = clear_io_irq(dev->kvm, attr); 2658 break; 2659 case KVM_DEV_FLIC_AISM: 2660 r = modify_ais_mode(dev->kvm, attr); 2661 break; 2662 case KVM_DEV_FLIC_AIRQ_INJECT: 2663 r = flic_inject_airq(dev->kvm, attr); 2664 break; 2665 case KVM_DEV_FLIC_AISM_ALL: 2666 r = flic_ais_mode_set_all(dev->kvm, attr); 2667 break; 2668 default: 2669 r = -EINVAL; 2670 } 2671 2672 return r; 2673} 2674 2675static int flic_has_attr(struct kvm_device *dev, 2676 struct kvm_device_attr *attr) 2677{ 2678 switch (attr->group) { 2679 case KVM_DEV_FLIC_GET_ALL_IRQS: 2680 case KVM_DEV_FLIC_ENQUEUE: 2681 case KVM_DEV_FLIC_CLEAR_IRQS: 2682 case KVM_DEV_FLIC_APF_ENABLE: 2683 case KVM_DEV_FLIC_APF_DISABLE_WAIT: 2684 case KVM_DEV_FLIC_ADAPTER_REGISTER: 2685 case KVM_DEV_FLIC_ADAPTER_MODIFY: 2686 case KVM_DEV_FLIC_CLEAR_IO_IRQ: 2687 case KVM_DEV_FLIC_AISM: 2688 case KVM_DEV_FLIC_AIRQ_INJECT: 2689 case KVM_DEV_FLIC_AISM_ALL: 2690 return 0; 2691 } 2692 return -ENXIO; 2693} 2694 2695static int flic_create(struct kvm_device *dev, u32 type) 2696{ 2697 if (!dev) 2698 return -EINVAL; 2699 if (dev->kvm->arch.flic) 2700 return -EINVAL; 2701 dev->kvm->arch.flic = dev; 2702 return 0; 2703} 2704 2705static void flic_destroy(struct kvm_device *dev) 2706{ 2707 dev->kvm->arch.flic = NULL; 2708 kfree(dev); 2709} 2710 2711/* s390 floating irq controller (flic) */ 2712struct kvm_device_ops kvm_flic_ops = { 2713 .name = "kvm-flic", 2714 .get_attr = flic_get_attr, 2715 .set_attr = flic_set_attr, 2716 .has_attr = flic_has_attr, 2717 .create = flic_create, 2718 .destroy = flic_destroy, 2719}; 2720 2721static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) 2722{ 2723 unsigned long bit; 2724 2725 bit = bit_nr + (addr % PAGE_SIZE) * 8; 2726 2727 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; 2728} 2729 2730static struct page *get_map_page(struct kvm *kvm, u64 uaddr) 2731{ 2732 struct mm_struct *mm = kvm->mm; 2733 struct page *page = NULL; 2734 int locked = 1; 2735 2736 if (mmget_not_zero(mm)) { 2737 mmap_read_lock(mm); 2738 get_user_pages_remote(mm, uaddr, 1, FOLL_WRITE, 2739 &page, &locked); 2740 if (locked) 2741 mmap_read_unlock(mm); 2742 mmput(mm); 2743 } 2744 2745 return page; 2746} 2747 2748static int adapter_indicators_set(struct kvm *kvm, 2749 struct s390_io_adapter *adapter, 2750 struct kvm_s390_adapter_int *adapter_int) 2751{ 2752 unsigned long bit; 2753 int summary_set, idx; 2754 struct page *ind_page, *summary_page; 2755 void *map; 2756 2757 ind_page = get_map_page(kvm, adapter_int->ind_addr); 2758 if (!ind_page) 2759 return -1; 2760 summary_page = get_map_page(kvm, adapter_int->summary_addr); 2761 if (!summary_page) { 2762 put_page(ind_page); 2763 return -1; 2764 } 2765 2766 idx = srcu_read_lock(&kvm->srcu); 2767 map = page_address(ind_page); 2768 bit = get_ind_bit(adapter_int->ind_addr, 2769 adapter_int->ind_offset, adapter->swap); 2770 set_bit(bit, map); 2771 mark_page_dirty(kvm, adapter_int->ind_addr >> PAGE_SHIFT); 2772 set_page_dirty_lock(ind_page); 2773 map = page_address(summary_page); 2774 bit = get_ind_bit(adapter_int->summary_addr, 2775 adapter_int->summary_offset, adapter->swap); 2776 summary_set = test_and_set_bit(bit, map); 2777 mark_page_dirty(kvm, adapter_int->summary_addr >> PAGE_SHIFT); 2778 set_page_dirty_lock(summary_page); 2779 srcu_read_unlock(&kvm->srcu, idx); 2780 2781 put_page(ind_page); 2782 put_page(summary_page); 2783 return summary_set ? 0 : 1; 2784} 2785 2786/* 2787 * < 0 - not injected due to error 2788 * = 0 - coalesced, summary indicator already active 2789 * > 0 - injected interrupt 2790 */ 2791static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, 2792 struct kvm *kvm, int irq_source_id, int level, 2793 bool line_status) 2794{ 2795 int ret; 2796 struct s390_io_adapter *adapter; 2797 2798 /* We're only interested in the 0->1 transition. */ 2799 if (!level) 2800 return 0; 2801 adapter = get_io_adapter(kvm, e->adapter.adapter_id); 2802 if (!adapter) 2803 return -1; 2804 ret = adapter_indicators_set(kvm, adapter, &e->adapter); 2805 if ((ret > 0) && !adapter->masked) { 2806 ret = kvm_s390_inject_airq(kvm, adapter); 2807 if (ret == 0) 2808 ret = 1; 2809 } 2810 return ret; 2811} 2812 2813/* 2814 * Inject the machine check to the guest. 2815 */ 2816void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, 2817 struct mcck_volatile_info *mcck_info) 2818{ 2819 struct kvm_s390_interrupt_info inti; 2820 struct kvm_s390_irq irq; 2821 struct kvm_s390_mchk_info *mchk; 2822 union mci mci; 2823 __u64 cr14 = 0; /* upper bits are not used */ 2824 int rc; 2825 2826 mci.val = mcck_info->mcic; 2827 if (mci.sr) 2828 cr14 |= CR14_RECOVERY_SUBMASK; 2829 if (mci.dg) 2830 cr14 |= CR14_DEGRADATION_SUBMASK; 2831 if (mci.w) 2832 cr14 |= CR14_WARNING_SUBMASK; 2833 2834 mchk = mci.ck ? &inti.mchk : &irq.u.mchk; 2835 mchk->cr14 = cr14; 2836 mchk->mcic = mcck_info->mcic; 2837 mchk->ext_damage_code = mcck_info->ext_damage_code; 2838 mchk->failing_storage_address = mcck_info->failing_storage_address; 2839 if (mci.ck) { 2840 /* Inject the floating machine check */ 2841 inti.type = KVM_S390_MCHK; 2842 rc = __inject_vm(vcpu->kvm, &inti); 2843 } else { 2844 /* Inject the machine check to specified vcpu */ 2845 irq.type = KVM_S390_MCHK; 2846 rc = kvm_s390_inject_vcpu(vcpu, &irq); 2847 } 2848 WARN_ON_ONCE(rc); 2849} 2850 2851int kvm_set_routing_entry(struct kvm *kvm, 2852 struct kvm_kernel_irq_routing_entry *e, 2853 const struct kvm_irq_routing_entry *ue) 2854{ 2855 u64 uaddr_s, uaddr_i; 2856 int idx; 2857 2858 switch (ue->type) { 2859 /* we store the userspace addresses instead of the guest addresses */ 2860 case KVM_IRQ_ROUTING_S390_ADAPTER: 2861 if (kvm_is_ucontrol(kvm)) 2862 return -EINVAL; 2863 e->set = set_adapter_int; 2864 2865 idx = srcu_read_lock(&kvm->srcu); 2866 uaddr_s = gpa_to_hva(kvm, ue->u.adapter.summary_addr); 2867 uaddr_i = gpa_to_hva(kvm, ue->u.adapter.ind_addr); 2868 srcu_read_unlock(&kvm->srcu, idx); 2869 2870 if (kvm_is_error_hva(uaddr_s) || kvm_is_error_hva(uaddr_i)) 2871 return -EFAULT; 2872 e->adapter.summary_addr = uaddr_s; 2873 e->adapter.ind_addr = uaddr_i; 2874 e->adapter.summary_offset = ue->u.adapter.summary_offset; 2875 e->adapter.ind_offset = ue->u.adapter.ind_offset; 2876 e->adapter.adapter_id = ue->u.adapter.adapter_id; 2877 return 0; 2878 default: 2879 return -EINVAL; 2880 } 2881} 2882 2883int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, 2884 int irq_source_id, int level, bool line_status) 2885{ 2886 return -EINVAL; 2887} 2888 2889int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len) 2890{ 2891 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 2892 struct kvm_s390_irq *buf; 2893 int r = 0; 2894 int n; 2895 2896 buf = vmalloc(len); 2897 if (!buf) 2898 return -ENOMEM; 2899 2900 if (copy_from_user((void *) buf, irqstate, len)) { 2901 r = -EFAULT; 2902 goto out_free; 2903 } 2904 2905 /* 2906 * Don't allow setting the interrupt state 2907 * when there are already interrupts pending 2908 */ 2909 spin_lock(&li->lock); 2910 if (li->pending_irqs) { 2911 r = -EBUSY; 2912 goto out_unlock; 2913 } 2914 2915 for (n = 0; n < len / sizeof(*buf); n++) { 2916 r = do_inject_vcpu(vcpu, &buf[n]); 2917 if (r) 2918 break; 2919 } 2920 2921out_unlock: 2922 spin_unlock(&li->lock); 2923out_free: 2924 vfree(buf); 2925 2926 return r; 2927} 2928 2929static void store_local_irq(struct kvm_s390_local_interrupt *li, 2930 struct kvm_s390_irq *irq, 2931 unsigned long irq_type) 2932{ 2933 switch (irq_type) { 2934 case IRQ_PEND_MCHK_EX: 2935 case IRQ_PEND_MCHK_REP: 2936 irq->type = KVM_S390_MCHK; 2937 irq->u.mchk = li->irq.mchk; 2938 break; 2939 case IRQ_PEND_PROG: 2940 irq->type = KVM_S390_PROGRAM_INT; 2941 irq->u.pgm = li->irq.pgm; 2942 break; 2943 case IRQ_PEND_PFAULT_INIT: 2944 irq->type = KVM_S390_INT_PFAULT_INIT; 2945 irq->u.ext = li->irq.ext; 2946 break; 2947 case IRQ_PEND_EXT_EXTERNAL: 2948 irq->type = KVM_S390_INT_EXTERNAL_CALL; 2949 irq->u.extcall = li->irq.extcall; 2950 break; 2951 case IRQ_PEND_EXT_CLOCK_COMP: 2952 irq->type = KVM_S390_INT_CLOCK_COMP; 2953 break; 2954 case IRQ_PEND_EXT_CPU_TIMER: 2955 irq->type = KVM_S390_INT_CPU_TIMER; 2956 break; 2957 case IRQ_PEND_SIGP_STOP: 2958 irq->type = KVM_S390_SIGP_STOP; 2959 irq->u.stop = li->irq.stop; 2960 break; 2961 case IRQ_PEND_RESTART: 2962 irq->type = KVM_S390_RESTART; 2963 break; 2964 case IRQ_PEND_SET_PREFIX: 2965 irq->type = KVM_S390_SIGP_SET_PREFIX; 2966 irq->u.prefix = li->irq.prefix; 2967 break; 2968 } 2969} 2970 2971int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len) 2972{ 2973 int scn; 2974 DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS); 2975 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; 2976 unsigned long pending_irqs; 2977 struct kvm_s390_irq irq; 2978 unsigned long irq_type; 2979 int cpuaddr; 2980 int n = 0; 2981 2982 spin_lock(&li->lock); 2983 pending_irqs = li->pending_irqs; 2984 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending, 2985 sizeof(sigp_emerg_pending)); 2986 spin_unlock(&li->lock); 2987 2988 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) { 2989 memset(&irq, 0, sizeof(irq)); 2990 if (irq_type == IRQ_PEND_EXT_EMERGENCY) 2991 continue; 2992 if (n + sizeof(irq) > len) 2993 return -ENOBUFS; 2994 store_local_irq(&vcpu->arch.local_int, &irq, irq_type); 2995 if (copy_to_user(&buf[n], &irq, sizeof(irq))) 2996 return -EFAULT; 2997 n += sizeof(irq); 2998 } 2999 3000 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) { 3001 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) { 3002 memset(&irq, 0, sizeof(irq)); 3003 if (n + sizeof(irq) > len) 3004 return -ENOBUFS; 3005 irq.type = KVM_S390_INT_EMERGENCY; 3006 irq.u.emerg.code = cpuaddr; 3007 if (copy_to_user(&buf[n], &irq, sizeof(irq))) 3008 return -EFAULT; 3009 n += sizeof(irq); 3010 } 3011 } 3012 3013 if (sca_ext_call_pending(vcpu, &scn)) { 3014 if (n + sizeof(irq) > len) 3015 return -ENOBUFS; 3016 memset(&irq, 0, sizeof(irq)); 3017 irq.type = KVM_S390_INT_EXTERNAL_CALL; 3018 irq.u.extcall.code = scn; 3019 if (copy_to_user(&buf[n], &irq, sizeof(irq))) 3020 return -EFAULT; 3021 n += sizeof(irq); 3022 } 3023 3024 return n; 3025} 3026 3027static void __airqs_kick_single_vcpu(struct kvm *kvm, u8 deliverable_mask) 3028{ 3029 int vcpu_idx, online_vcpus = atomic_read(&kvm->online_vcpus); 3030 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 3031 struct kvm_vcpu *vcpu; 3032 u8 vcpu_isc_mask; 3033 3034 for_each_set_bit(vcpu_idx, kvm->arch.idle_mask, online_vcpus) { 3035 vcpu = kvm_get_vcpu(kvm, vcpu_idx); 3036 if (psw_ioint_disabled(vcpu)) 3037 continue; 3038 vcpu_isc_mask = (u8)(vcpu->arch.sie_block->gcr[6] >> 24); 3039 if (deliverable_mask & vcpu_isc_mask) { 3040 /* lately kicked but not yet running */ 3041 if (test_and_set_bit(vcpu_idx, gi->kicked_mask)) 3042 return; 3043 kvm_s390_vcpu_wakeup(vcpu); 3044 return; 3045 } 3046 } 3047} 3048 3049static enum hrtimer_restart gisa_vcpu_kicker(struct hrtimer *timer) 3050{ 3051 struct kvm_s390_gisa_interrupt *gi = 3052 container_of(timer, struct kvm_s390_gisa_interrupt, timer); 3053 struct kvm *kvm = 3054 container_of(gi->origin, struct sie_page2, gisa)->kvm; 3055 u8 pending_mask; 3056 3057 pending_mask = gisa_get_ipm_or_restore_iam(gi); 3058 if (pending_mask) { 3059 __airqs_kick_single_vcpu(kvm, pending_mask); 3060 hrtimer_forward_now(timer, ns_to_ktime(gi->expires)); 3061 return HRTIMER_RESTART; 3062 } 3063 3064 return HRTIMER_NORESTART; 3065} 3066 3067#define NULL_GISA_ADDR 0x00000000UL 3068#define NONE_GISA_ADDR 0x00000001UL 3069#define GISA_ADDR_MASK 0xfffff000UL 3070 3071static void process_gib_alert_list(void) 3072{ 3073 struct kvm_s390_gisa_interrupt *gi; 3074 u32 final, gisa_phys, origin = 0UL; 3075 struct kvm_s390_gisa *gisa; 3076 struct kvm *kvm; 3077 3078 do { 3079 /* 3080 * If the NONE_GISA_ADDR is still stored in the alert list 3081 * origin, we will leave the outer loop. No further GISA has 3082 * been added to the alert list by millicode while processing 3083 * the current alert list. 3084 */ 3085 final = (origin & NONE_GISA_ADDR); 3086 /* 3087 * Cut off the alert list and store the NONE_GISA_ADDR in the 3088 * alert list origin to avoid further GAL interruptions. 3089 * A new alert list can be build up by millicode in parallel 3090 * for guests not in the yet cut-off alert list. When in the 3091 * final loop, store the NULL_GISA_ADDR instead. This will re- 3092 * enable GAL interruptions on the host again. 3093 */ 3094 origin = xchg(&gib->alert_list_origin, 3095 (!final) ? NONE_GISA_ADDR : NULL_GISA_ADDR); 3096 /* 3097 * Loop through the just cut-off alert list and start the 3098 * gisa timers to kick idle vcpus to consume the pending 3099 * interruptions asap. 3100 */ 3101 while (origin & GISA_ADDR_MASK) { 3102 gisa_phys = origin; 3103 gisa = phys_to_virt(gisa_phys); 3104 origin = gisa->next_alert; 3105 gisa->next_alert = gisa_phys; 3106 kvm = container_of(gisa, struct sie_page2, gisa)->kvm; 3107 gi = &kvm->arch.gisa_int; 3108 if (hrtimer_active(&gi->timer)) 3109 hrtimer_cancel(&gi->timer); 3110 hrtimer_start(&gi->timer, 0, HRTIMER_MODE_REL); 3111 } 3112 } while (!final); 3113 3114} 3115 3116void kvm_s390_gisa_clear(struct kvm *kvm) 3117{ 3118 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 3119 3120 if (!gi->origin) 3121 return; 3122 gisa_clear_ipm(gi->origin); 3123 VM_EVENT(kvm, 3, "gisa 0x%p cleared", gi->origin); 3124} 3125 3126void kvm_s390_gisa_init(struct kvm *kvm) 3127{ 3128 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 3129 3130 if (!css_general_characteristics.aiv) 3131 return; 3132 gi->origin = &kvm->arch.sie_page2->gisa; 3133 gi->alert.mask = 0; 3134 spin_lock_init(&gi->alert.ref_lock); 3135 gi->expires = 50 * 1000; /* 50 usec */ 3136 hrtimer_setup(&gi->timer, gisa_vcpu_kicker, CLOCK_MONOTONIC, HRTIMER_MODE_REL); 3137 memset(gi->origin, 0, sizeof(struct kvm_s390_gisa)); 3138 gi->origin->next_alert = (u32)virt_to_phys(gi->origin); 3139 VM_EVENT(kvm, 3, "gisa 0x%p initialized", gi->origin); 3140} 3141 3142void kvm_s390_gisa_enable(struct kvm *kvm) 3143{ 3144 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 3145 struct kvm_vcpu *vcpu; 3146 unsigned long i; 3147 u32 gisa_desc; 3148 3149 if (gi->origin) 3150 return; 3151 kvm_s390_gisa_init(kvm); 3152 gisa_desc = kvm_s390_get_gisa_desc(kvm); 3153 if (!gisa_desc) 3154 return; 3155 kvm_for_each_vcpu(i, vcpu, kvm) { 3156 mutex_lock(&vcpu->mutex); 3157 vcpu->arch.sie_block->gd = gisa_desc; 3158 vcpu->arch.sie_block->eca |= ECA_AIV; 3159 VCPU_EVENT(vcpu, 3, "AIV gisa format-%u enabled for cpu %03u", 3160 vcpu->arch.sie_block->gd & 0x3, vcpu->vcpu_id); 3161 mutex_unlock(&vcpu->mutex); 3162 } 3163} 3164 3165void kvm_s390_gisa_destroy(struct kvm *kvm) 3166{ 3167 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 3168 struct kvm_s390_gisa *gisa = gi->origin; 3169 3170 if (!gi->origin) 3171 return; 3172 WARN(gi->alert.mask != 0x00, 3173 "unexpected non zero alert.mask 0x%02x", 3174 gi->alert.mask); 3175 gi->alert.mask = 0x00; 3176 if (gisa_set_iam(gi->origin, gi->alert.mask)) 3177 process_gib_alert_list(); 3178 hrtimer_cancel(&gi->timer); 3179 gi->origin = NULL; 3180 VM_EVENT(kvm, 3, "gisa 0x%p destroyed", gisa); 3181} 3182 3183void kvm_s390_gisa_disable(struct kvm *kvm) 3184{ 3185 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 3186 struct kvm_vcpu *vcpu; 3187 unsigned long i; 3188 3189 if (!gi->origin) 3190 return; 3191 kvm_for_each_vcpu(i, vcpu, kvm) { 3192 mutex_lock(&vcpu->mutex); 3193 vcpu->arch.sie_block->eca &= ~ECA_AIV; 3194 vcpu->arch.sie_block->gd = 0U; 3195 mutex_unlock(&vcpu->mutex); 3196 VCPU_EVENT(vcpu, 3, "AIV disabled for cpu %03u", vcpu->vcpu_id); 3197 } 3198 kvm_s390_gisa_destroy(kvm); 3199} 3200 3201/** 3202 * kvm_s390_gisc_register - register a guest ISC 3203 * 3204 * @kvm: the kernel vm to work with 3205 * @gisc: the guest interruption sub class to register 3206 * 3207 * The function extends the vm specific alert mask to use. 3208 * The effective IAM mask in the GISA is updated as well 3209 * in case the GISA is not part of the GIB alert list. 3210 * It will be updated latest when the IAM gets restored 3211 * by gisa_get_ipm_or_restore_iam(). 3212 * 3213 * Returns: the nonspecific ISC (NISC) the gib alert mechanism 3214 * has registered with the channel subsystem. 3215 * -ENODEV in case the vm uses no GISA 3216 * -ERANGE in case the guest ISC is invalid 3217 */ 3218int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc) 3219{ 3220 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 3221 3222 if (!gi->origin) 3223 return -ENODEV; 3224 if (gisc > MAX_ISC) 3225 return -ERANGE; 3226 3227 spin_lock(&gi->alert.ref_lock); 3228 gi->alert.ref_count[gisc]++; 3229 if (gi->alert.ref_count[gisc] == 1) { 3230 gi->alert.mask |= 0x80 >> gisc; 3231 gisa_set_iam(gi->origin, gi->alert.mask); 3232 } 3233 spin_unlock(&gi->alert.ref_lock); 3234 3235 return gib->nisc; 3236} 3237EXPORT_SYMBOL_GPL(kvm_s390_gisc_register); 3238 3239/** 3240 * kvm_s390_gisc_unregister - unregister a guest ISC 3241 * 3242 * @kvm: the kernel vm to work with 3243 * @gisc: the guest interruption sub class to register 3244 * 3245 * The function reduces the vm specific alert mask to use. 3246 * The effective IAM mask in the GISA is updated as well 3247 * in case the GISA is not part of the GIB alert list. 3248 * It will be updated latest when the IAM gets restored 3249 * by gisa_get_ipm_or_restore_iam(). 3250 * 3251 * Returns: the nonspecific ISC (NISC) the gib alert mechanism 3252 * has registered with the channel subsystem. 3253 * -ENODEV in case the vm uses no GISA 3254 * -ERANGE in case the guest ISC is invalid 3255 * -EINVAL in case the guest ISC is not registered 3256 */ 3257int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc) 3258{ 3259 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; 3260 int rc = 0; 3261 3262 if (!gi->origin) 3263 return -ENODEV; 3264 if (gisc > MAX_ISC) 3265 return -ERANGE; 3266 3267 spin_lock(&gi->alert.ref_lock); 3268 if (gi->alert.ref_count[gisc] == 0) { 3269 rc = -EINVAL; 3270 goto out; 3271 } 3272 gi->alert.ref_count[gisc]--; 3273 if (gi->alert.ref_count[gisc] == 0) { 3274 gi->alert.mask &= ~(0x80 >> gisc); 3275 gisa_set_iam(gi->origin, gi->alert.mask); 3276 } 3277out: 3278 spin_unlock(&gi->alert.ref_lock); 3279 3280 return rc; 3281} 3282EXPORT_SYMBOL_GPL(kvm_s390_gisc_unregister); 3283 3284static void aen_host_forward(unsigned long si) 3285{ 3286 struct kvm_s390_gisa_interrupt *gi; 3287 struct zpci_gaite *gaite; 3288 struct kvm *kvm; 3289 3290 gaite = (struct zpci_gaite *)aift->gait + 3291 (si * sizeof(struct zpci_gaite)); 3292 if (gaite->count == 0) 3293 return; 3294 if (gaite->aisb != 0) 3295 set_bit_inv(gaite->aisbo, phys_to_virt(gaite->aisb)); 3296 3297 kvm = kvm_s390_pci_si_to_kvm(aift, si); 3298 if (!kvm) 3299 return; 3300 gi = &kvm->arch.gisa_int; 3301 3302 if (!(gi->origin->g1.simm & AIS_MODE_MASK(gaite->gisc)) || 3303 !(gi->origin->g1.nimm & AIS_MODE_MASK(gaite->gisc))) { 3304 gisa_set_ipm_gisc(gi->origin, gaite->gisc); 3305 if (hrtimer_active(&gi->timer)) 3306 hrtimer_cancel(&gi->timer); 3307 hrtimer_start(&gi->timer, 0, HRTIMER_MODE_REL); 3308 kvm->stat.aen_forward++; 3309 } 3310} 3311 3312static void aen_process_gait(u8 isc) 3313{ 3314 bool found = false, first = true; 3315 union zpci_sic_iib iib = {{0}}; 3316 unsigned long si, flags; 3317 3318 spin_lock_irqsave(&aift->gait_lock, flags); 3319 3320 if (!aift->gait) { 3321 spin_unlock_irqrestore(&aift->gait_lock, flags); 3322 return; 3323 } 3324 3325 for (si = 0;;) { 3326 /* Scan adapter summary indicator bit vector */ 3327 si = airq_iv_scan(aift->sbv, si, airq_iv_end(aift->sbv)); 3328 if (si == -1UL) { 3329 if (first || found) { 3330 /* Re-enable interrupts. */ 3331 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, isc, 3332 &iib); 3333 first = found = false; 3334 } else { 3335 /* Interrupts on and all bits processed */ 3336 break; 3337 } 3338 found = false; 3339 si = 0; 3340 /* Scan again after re-enabling interrupts */ 3341 continue; 3342 } 3343 found = true; 3344 aen_host_forward(si); 3345 } 3346 3347 spin_unlock_irqrestore(&aift->gait_lock, flags); 3348} 3349 3350static void gib_alert_irq_handler(struct airq_struct *airq, 3351 struct tpi_info *tpi_info) 3352{ 3353 struct tpi_adapter_info *info = (struct tpi_adapter_info *)tpi_info; 3354 3355 inc_irq_stat(IRQIO_GAL); 3356 3357 if ((info->forward || info->error) && 3358 IS_ENABLED(CONFIG_VFIO_PCI_ZDEV_KVM)) { 3359 aen_process_gait(info->isc); 3360 if (info->aism != 0) 3361 process_gib_alert_list(); 3362 } else { 3363 process_gib_alert_list(); 3364 } 3365} 3366 3367static struct airq_struct gib_alert_irq = { 3368 .handler = gib_alert_irq_handler, 3369}; 3370 3371void kvm_s390_gib_destroy(void) 3372{ 3373 if (!gib) 3374 return; 3375 if (kvm_s390_pci_interp_allowed() && aift) { 3376 mutex_lock(&aift->aift_lock); 3377 kvm_s390_pci_aen_exit(); 3378 mutex_unlock(&aift->aift_lock); 3379 } 3380 chsc_sgib(0); 3381 unregister_adapter_interrupt(&gib_alert_irq); 3382 free_page((unsigned long)gib); 3383 gib = NULL; 3384} 3385 3386int __init kvm_s390_gib_init(u8 nisc) 3387{ 3388 u32 gib_origin; 3389 int rc = 0; 3390 3391 if (!css_general_characteristics.aiv) { 3392 KVM_EVENT(3, "%s", "gib not initialized, no AIV facility"); 3393 goto out; 3394 } 3395 3396 gib = (struct kvm_s390_gib *)get_zeroed_page(GFP_KERNEL_ACCOUNT | GFP_DMA); 3397 if (!gib) { 3398 rc = -ENOMEM; 3399 goto out; 3400 } 3401 3402 gib_alert_irq.isc = nisc; 3403 if (register_adapter_interrupt(&gib_alert_irq)) { 3404 pr_err("Registering the GIB alert interruption handler failed\n"); 3405 rc = -EIO; 3406 goto out_free_gib; 3407 } 3408 /* adapter interrupts used for AP (applicable here) don't use the LSI */ 3409 *gib_alert_irq.lsi_ptr = 0xff; 3410 3411 gib->nisc = nisc; 3412 gib_origin = virt_to_phys(gib); 3413 if (chsc_sgib(gib_origin)) { 3414 pr_err("Associating the GIB with the AIV facility failed\n"); 3415 free_page((unsigned long)gib); 3416 gib = NULL; 3417 rc = -EIO; 3418 goto out_unreg_gal; 3419 } 3420 3421 if (kvm_s390_pci_interp_allowed()) { 3422 if (kvm_s390_pci_aen_init(nisc)) { 3423 pr_err("Initializing AEN for PCI failed\n"); 3424 rc = -EIO; 3425 goto out_unreg_gal; 3426 } 3427 } 3428 3429 KVM_EVENT(3, "gib 0x%p (nisc=%d) initialized", gib, gib->nisc); 3430 goto out; 3431 3432out_unreg_gal: 3433 unregister_adapter_interrupt(&gib_alert_irq); 3434out_free_gib: 3435 free_page((unsigned long)gib); 3436 gib = NULL; 3437out: 3438 return rc; 3439}
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