2 * handling kvm guest interrupts
4 * Copyright IBM Corp. 2008, 2015
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
13 #include <linux/interrupt.h>
14 #include <linux/kvm_host.h>
15 #include <linux/hrtimer.h>
16 #include <linux/mmu_context.h>
17 #include <linux/signal.h>
18 #include <linux/slab.h>
19 #include <linux/bitmap.h>
20 #include <linux/vmalloc.h>
21 #include <asm/asm-offsets.h>
23 #include <asm/uaccess.h>
27 #include <asm/switch_to.h>
31 #include "trace-s390.h"
33 #define PFAULT_INIT 0x0600
34 #define PFAULT_DONE 0x0680
35 #define VIRTIO_PARAM 0x0d00
37 /* handle external calls via sigp interpretation facility */
38 static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id)
42 if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND))
45 BUG_ON(!kvm_s390_use_sca_entries());
46 read_lock(&vcpu->kvm->arch.sca_lock);
47 if (vcpu->kvm->arch.use_esca) {
48 struct esca_block *sca = vcpu->kvm->arch.sca;
49 union esca_sigp_ctrl sigp_ctrl =
50 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
55 struct bsca_block *sca = vcpu->kvm->arch.sca;
56 union bsca_sigp_ctrl sigp_ctrl =
57 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
62 read_unlock(&vcpu->kvm->arch.sca_lock);
70 static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id)
74 BUG_ON(!kvm_s390_use_sca_entries());
75 read_lock(&vcpu->kvm->arch.sca_lock);
76 if (vcpu->kvm->arch.use_esca) {
77 struct esca_block *sca = vcpu->kvm->arch.sca;
78 union esca_sigp_ctrl *sigp_ctrl =
79 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
80 union esca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
86 expect = old_val.value;
87 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
89 struct bsca_block *sca = vcpu->kvm->arch.sca;
90 union bsca_sigp_ctrl *sigp_ctrl =
91 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
92 union bsca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
98 expect = old_val.value;
99 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
101 read_unlock(&vcpu->kvm->arch.sca_lock);
104 /* another external call is pending */
107 atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
111 static void sca_clear_ext_call(struct kvm_vcpu *vcpu)
113 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
116 if (!kvm_s390_use_sca_entries())
118 atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags);
119 read_lock(&vcpu->kvm->arch.sca_lock);
120 if (vcpu->kvm->arch.use_esca) {
121 struct esca_block *sca = vcpu->kvm->arch.sca;
122 union esca_sigp_ctrl *sigp_ctrl =
123 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
124 union esca_sigp_ctrl old = *sigp_ctrl;
127 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
129 struct bsca_block *sca = vcpu->kvm->arch.sca;
130 union bsca_sigp_ctrl *sigp_ctrl =
131 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
132 union bsca_sigp_ctrl old = *sigp_ctrl;
135 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
137 read_unlock(&vcpu->kvm->arch.sca_lock);
138 WARN_ON(rc != expect); /* cannot clear? */
141 int psw_extint_disabled(struct kvm_vcpu *vcpu)
143 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
146 static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
148 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
151 static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
153 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
156 static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
158 return psw_extint_disabled(vcpu) &&
159 psw_ioint_disabled(vcpu) &&
160 psw_mchk_disabled(vcpu);
163 static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
165 if (psw_extint_disabled(vcpu) ||
166 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
168 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
169 /* No timer interrupts when single stepping */
174 static int ckc_irq_pending(struct kvm_vcpu *vcpu)
176 if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm))
178 return ckc_interrupts_enabled(vcpu);
181 static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
183 return !psw_extint_disabled(vcpu) &&
184 (vcpu->arch.sie_block->gcr[0] & 0x400ul);
187 static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
189 if (!cpu_timer_interrupts_enabled(vcpu))
191 return kvm_s390_get_cpu_timer(vcpu) >> 63;
194 static inline int is_ioirq(unsigned long irq_type)
196 return ((irq_type >= IRQ_PEND_IO_ISC_0) &&
197 (irq_type <= IRQ_PEND_IO_ISC_7));
200 static uint64_t isc_to_isc_bits(int isc)
202 return (0x80 >> isc) << 24;
205 static inline u8 int_word_to_isc(u32 int_word)
207 return (int_word & 0x38000000) >> 27;
210 static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
212 return vcpu->kvm->arch.float_int.pending_irqs |
213 vcpu->arch.local_int.pending_irqs;
216 static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
217 unsigned long active_mask)
221 for (i = 0; i <= MAX_ISC; i++)
222 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
223 active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i));
228 static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
230 unsigned long active_mask;
232 active_mask = pending_irqs(vcpu);
236 if (psw_extint_disabled(vcpu))
237 active_mask &= ~IRQ_PEND_EXT_MASK;
238 if (psw_ioint_disabled(vcpu))
239 active_mask &= ~IRQ_PEND_IO_MASK;
241 active_mask = disable_iscs(vcpu, active_mask);
242 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
243 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
244 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
245 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
246 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
247 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
248 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
249 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
250 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
251 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
252 if (psw_mchk_disabled(vcpu))
253 active_mask &= ~IRQ_PEND_MCHK_MASK;
254 if (!(vcpu->arch.sie_block->gcr[14] &
255 vcpu->kvm->arch.float_int.mchk.cr14))
256 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
259 * STOP irqs will never be actively delivered. They are triggered via
260 * intercept requests and cleared when the stop intercept is performed.
262 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
267 static void __set_cpu_idle(struct kvm_vcpu *vcpu)
269 atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
270 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
273 static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
275 atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
276 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
279 static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
281 atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
282 &vcpu->arch.sie_block->cpuflags);
283 vcpu->arch.sie_block->lctl = 0x0000;
284 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
286 if (guestdbg_enabled(vcpu)) {
287 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
288 LCTL_CR10 | LCTL_CR11);
289 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
293 static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
295 atomic_or(flag, &vcpu->arch.sie_block->cpuflags);
298 static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
300 if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK))
302 else if (psw_ioint_disabled(vcpu))
303 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
305 vcpu->arch.sie_block->lctl |= LCTL_CR6;
308 static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
310 if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
312 if (psw_extint_disabled(vcpu))
313 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
315 vcpu->arch.sie_block->lctl |= LCTL_CR0;
318 static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
320 if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
322 if (psw_mchk_disabled(vcpu))
323 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
325 vcpu->arch.sie_block->lctl |= LCTL_CR14;
328 static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
330 if (kvm_s390_is_stop_irq_pending(vcpu))
331 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
334 /* Set interception request for non-deliverable interrupts */
335 static void set_intercept_indicators(struct kvm_vcpu *vcpu)
337 set_intercept_indicators_io(vcpu);
338 set_intercept_indicators_ext(vcpu);
339 set_intercept_indicators_mchk(vcpu);
340 set_intercept_indicators_stop(vcpu);
343 static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
345 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
348 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
351 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
352 (u16 *)__LC_EXT_INT_CODE);
353 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
354 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
355 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
356 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
357 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
358 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
359 return rc ? -EFAULT : 0;
362 static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
364 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
367 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
370 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
371 (u16 __user *)__LC_EXT_INT_CODE);
372 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
373 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
374 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
375 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
376 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
377 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
378 return rc ? -EFAULT : 0;
381 static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
383 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
384 struct kvm_s390_ext_info ext;
387 spin_lock(&li->lock);
389 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
390 li->irq.ext.ext_params2 = 0;
391 spin_unlock(&li->lock);
393 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
395 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
396 KVM_S390_INT_PFAULT_INIT,
399 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
400 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
401 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
402 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
403 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
404 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
405 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
406 return rc ? -EFAULT : 0;
409 static int __write_machine_check(struct kvm_vcpu *vcpu,
410 struct kvm_s390_mchk_info *mchk)
412 unsigned long ext_sa_addr;
413 freg_t fprs[NUM_FPRS];
417 mci.val = mchk->mcic;
418 /* take care of lazy register loading via vcpu load/put */
420 save_access_regs(vcpu->run->s.regs.acrs);
422 /* Extended save area */
423 rc = read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR, &ext_sa_addr,
424 sizeof(unsigned long));
425 /* Only bits 0-53 are used for address formation */
426 ext_sa_addr &= ~0x3ffUL;
427 if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
428 if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
435 /* General interruption information */
436 rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
437 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
438 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
439 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
440 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
441 rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);
443 /* Register-save areas */
444 if (MACHINE_HAS_VX) {
445 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
446 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
448 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA,
449 vcpu->run->s.regs.fprs, 128);
451 rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA,
452 vcpu->run->s.regs.gprs, 128);
453 rc |= put_guest_lc(vcpu, current->thread.fpu.fpc,
454 (u32 __user *) __LC_FP_CREG_SAVE_AREA);
455 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr,
456 (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA);
457 rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu),
458 (u64 __user *) __LC_CPU_TIMER_SAVE_AREA);
459 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8,
460 (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA);
461 rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA,
462 &vcpu->run->s.regs.acrs, 64);
463 rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA,
464 &vcpu->arch.sie_block->gcr, 128);
466 /* Extended interruption information */
467 rc |= put_guest_lc(vcpu, mchk->ext_damage_code,
468 (u32 __user *) __LC_EXT_DAMAGE_CODE);
469 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
470 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
471 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout,
472 sizeof(mchk->fixed_logout));
473 return rc ? -EFAULT : 0;
476 static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
478 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
479 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
480 struct kvm_s390_mchk_info mchk = {};
484 spin_lock(&fi->lock);
485 spin_lock(&li->lock);
486 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
487 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
489 * If there was an exigent machine check pending, then any
490 * repressible machine checks that might have been pending
491 * are indicated along with it, so always clear bits for
492 * repressible and exigent interrupts
495 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
496 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
497 memset(&li->irq.mchk, 0, sizeof(mchk));
501 * We indicate floating repressible conditions along with
502 * other pending conditions. Channel Report Pending and Channel
503 * Subsystem damage are the only two and and are indicated by
504 * bits in mcic and masked in cr14.
506 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
507 mchk.mcic |= fi->mchk.mcic;
508 mchk.cr14 |= fi->mchk.cr14;
509 memset(&fi->mchk, 0, sizeof(mchk));
512 spin_unlock(&li->lock);
513 spin_unlock(&fi->lock);
516 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
518 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
520 mchk.cr14, mchk.mcic);
521 rc = __write_machine_check(vcpu, &mchk);
526 static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
528 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
531 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
532 vcpu->stat.deliver_restart_signal++;
533 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
535 rc = write_guest_lc(vcpu,
536 offsetof(struct lowcore, restart_old_psw),
537 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
538 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw),
539 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
540 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
541 return rc ? -EFAULT : 0;
544 static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
546 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
547 struct kvm_s390_prefix_info prefix;
549 spin_lock(&li->lock);
550 prefix = li->irq.prefix;
551 li->irq.prefix.address = 0;
552 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
553 spin_unlock(&li->lock);
555 vcpu->stat.deliver_prefix_signal++;
556 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
557 KVM_S390_SIGP_SET_PREFIX,
560 kvm_s390_set_prefix(vcpu, prefix.address);
564 static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
566 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
570 spin_lock(&li->lock);
571 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
572 clear_bit(cpu_addr, li->sigp_emerg_pending);
573 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
574 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
575 spin_unlock(&li->lock);
577 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
578 vcpu->stat.deliver_emergency_signal++;
579 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
582 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
583 (u16 *)__LC_EXT_INT_CODE);
584 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
585 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
586 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
587 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
588 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
589 return rc ? -EFAULT : 0;
592 static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
594 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
595 struct kvm_s390_extcall_info extcall;
598 spin_lock(&li->lock);
599 extcall = li->irq.extcall;
600 li->irq.extcall.code = 0;
601 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
602 spin_unlock(&li->lock);
604 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
605 vcpu->stat.deliver_external_call++;
606 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
607 KVM_S390_INT_EXTERNAL_CALL,
610 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
611 (u16 *)__LC_EXT_INT_CODE);
612 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
613 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
614 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
615 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
617 return rc ? -EFAULT : 0;
620 static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
622 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
623 struct kvm_s390_pgm_info pgm_info;
624 int rc = 0, nullifying = false;
627 spin_lock(&li->lock);
628 pgm_info = li->irq.pgm;
629 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
630 memset(&li->irq.pgm, 0, sizeof(pgm_info));
631 spin_unlock(&li->lock);
633 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
634 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
635 pgm_info.code, ilen);
636 vcpu->stat.deliver_program_int++;
637 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
640 switch (pgm_info.code & ~PGM_PER) {
641 case PGM_AFX_TRANSLATION:
642 case PGM_ASX_TRANSLATION:
643 case PGM_EX_TRANSLATION:
644 case PGM_LFX_TRANSLATION:
645 case PGM_LSTE_SEQUENCE:
646 case PGM_LSX_TRANSLATION:
647 case PGM_LX_TRANSLATION:
648 case PGM_PRIMARY_AUTHORITY:
649 case PGM_SECONDARY_AUTHORITY:
652 case PGM_SPACE_SWITCH:
653 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
654 (u64 *)__LC_TRANS_EXC_CODE);
656 case PGM_ALEN_TRANSLATION:
657 case PGM_ALE_SEQUENCE:
658 case PGM_ASTE_INSTANCE:
659 case PGM_ASTE_SEQUENCE:
660 case PGM_ASTE_VALIDITY:
661 case PGM_EXTENDED_AUTHORITY:
662 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
663 (u8 *)__LC_EXC_ACCESS_ID);
667 case PGM_PAGE_TRANSLATION:
668 case PGM_REGION_FIRST_TRANS:
669 case PGM_REGION_SECOND_TRANS:
670 case PGM_REGION_THIRD_TRANS:
671 case PGM_SEGMENT_TRANSLATION:
672 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
673 (u64 *)__LC_TRANS_EXC_CODE);
674 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
675 (u8 *)__LC_EXC_ACCESS_ID);
676 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
677 (u8 *)__LC_OP_ACCESS_ID);
681 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
682 (u16 *)__LC_MON_CLASS_NR);
683 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
684 (u64 *)__LC_MON_CODE);
686 case PGM_VECTOR_PROCESSING:
688 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
689 (u32 *)__LC_DATA_EXC_CODE);
692 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
693 (u64 *)__LC_TRANS_EXC_CODE);
694 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
695 (u8 *)__LC_EXC_ACCESS_ID);
698 case PGM_STACK_EMPTY:
699 case PGM_STACK_SPECIFICATION:
701 case PGM_STACK_OPERATION:
702 case PGM_TRACE_TABEL:
703 case PGM_CRYPTO_OPERATION:
708 if (pgm_info.code & PGM_PER) {
709 rc |= put_guest_lc(vcpu, pgm_info.per_code,
710 (u8 *) __LC_PER_CODE);
711 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
712 (u8 *)__LC_PER_ATMID);
713 rc |= put_guest_lc(vcpu, pgm_info.per_address,
714 (u64 *) __LC_PER_ADDRESS);
715 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
716 (u8 *) __LC_PER_ACCESS_ID);
719 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND))
720 kvm_s390_rewind_psw(vcpu, ilen);
722 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
723 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
724 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
725 (u64 *) __LC_LAST_BREAK);
726 rc |= put_guest_lc(vcpu, pgm_info.code,
727 (u16 *)__LC_PGM_INT_CODE);
728 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
729 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
730 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
731 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
732 return rc ? -EFAULT : 0;
735 static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
737 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
738 struct kvm_s390_ext_info ext;
741 spin_lock(&fi->lock);
742 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
743 spin_unlock(&fi->lock);
746 ext = fi->srv_signal;
747 memset(&fi->srv_signal, 0, sizeof(ext));
748 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
749 spin_unlock(&fi->lock);
751 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
753 vcpu->stat.deliver_service_signal++;
754 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
757 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
758 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
759 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
760 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
761 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
762 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
763 rc |= put_guest_lc(vcpu, ext.ext_params,
764 (u32 *)__LC_EXT_PARAMS);
766 return rc ? -EFAULT : 0;
769 static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
771 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
772 struct kvm_s390_interrupt_info *inti;
775 spin_lock(&fi->lock);
776 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
777 struct kvm_s390_interrupt_info,
780 list_del(&inti->list);
781 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
783 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
784 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
785 spin_unlock(&fi->lock);
788 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
789 KVM_S390_INT_PFAULT_DONE, 0,
790 inti->ext.ext_params2);
791 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
792 inti->ext.ext_params2);
794 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
795 (u16 *)__LC_EXT_INT_CODE);
796 rc |= put_guest_lc(vcpu, PFAULT_DONE,
797 (u16 *)__LC_EXT_CPU_ADDR);
798 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
799 &vcpu->arch.sie_block->gpsw,
801 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
802 &vcpu->arch.sie_block->gpsw,
804 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
805 (u64 *)__LC_EXT_PARAMS2);
808 return rc ? -EFAULT : 0;
811 static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
813 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
814 struct kvm_s390_interrupt_info *inti;
817 spin_lock(&fi->lock);
818 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
819 struct kvm_s390_interrupt_info,
823 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
824 inti->ext.ext_params, inti->ext.ext_params2);
825 vcpu->stat.deliver_virtio_interrupt++;
826 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
828 inti->ext.ext_params,
829 inti->ext.ext_params2);
830 list_del(&inti->list);
831 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
833 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
834 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
835 spin_unlock(&fi->lock);
838 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
839 (u16 *)__LC_EXT_INT_CODE);
840 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
841 (u16 *)__LC_EXT_CPU_ADDR);
842 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
843 &vcpu->arch.sie_block->gpsw,
845 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
846 &vcpu->arch.sie_block->gpsw,
848 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
849 (u32 *)__LC_EXT_PARAMS);
850 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
851 (u64 *)__LC_EXT_PARAMS2);
854 return rc ? -EFAULT : 0;
857 static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
858 unsigned long irq_type)
860 struct list_head *isc_list;
861 struct kvm_s390_float_interrupt *fi;
862 struct kvm_s390_interrupt_info *inti = NULL;
865 fi = &vcpu->kvm->arch.float_int;
867 spin_lock(&fi->lock);
868 isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0];
869 inti = list_first_entry_or_null(isc_list,
870 struct kvm_s390_interrupt_info,
873 if (inti->type & KVM_S390_INT_IO_AI_MASK)
874 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)");
876 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x",
877 inti->io.subchannel_id >> 8,
878 inti->io.subchannel_id >> 1 & 0x3,
879 inti->io.subchannel_nr);
881 vcpu->stat.deliver_io_int++;
882 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
884 ((__u32)inti->io.subchannel_id << 16) |
885 inti->io.subchannel_nr,
886 ((__u64)inti->io.io_int_parm << 32) |
887 inti->io.io_int_word);
888 list_del(&inti->list);
889 fi->counters[FIRQ_CNTR_IO] -= 1;
891 if (list_empty(isc_list))
892 clear_bit(irq_type, &fi->pending_irqs);
893 spin_unlock(&fi->lock);
896 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
897 (u16 *)__LC_SUBCHANNEL_ID);
898 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
899 (u16 *)__LC_SUBCHANNEL_NR);
900 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
901 (u32 *)__LC_IO_INT_PARM);
902 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
903 (u32 *)__LC_IO_INT_WORD);
904 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
905 &vcpu->arch.sie_block->gpsw,
907 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
908 &vcpu->arch.sie_block->gpsw,
913 return rc ? -EFAULT : 0;
916 typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
918 static const deliver_irq_t deliver_irq_funcs[] = {
919 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
920 [IRQ_PEND_MCHK_REP] = __deliver_machine_check,
921 [IRQ_PEND_PROG] = __deliver_prog,
922 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
923 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
924 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
925 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
926 [IRQ_PEND_RESTART] = __deliver_restart,
927 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
928 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
929 [IRQ_PEND_EXT_SERVICE] = __deliver_service,
930 [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done,
931 [IRQ_PEND_VIRTIO] = __deliver_virtio,
934 /* Check whether an external call is pending (deliverable or not) */
935 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
937 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
939 if (!sclp.has_sigpif)
940 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
942 return sca_ext_call_pending(vcpu, NULL);
945 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
947 if (deliverable_irqs(vcpu))
950 if (kvm_cpu_has_pending_timer(vcpu))
953 /* external call pending and deliverable */
954 if (kvm_s390_ext_call_pending(vcpu) &&
955 !psw_extint_disabled(vcpu) &&
956 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
959 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
964 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
966 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
969 static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
971 u64 now, cputm, sltime = 0;
973 if (ckc_interrupts_enabled(vcpu)) {
974 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
975 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
976 /* already expired or overflow? */
977 if (!sltime || vcpu->arch.sie_block->ckc <= now)
979 if (cpu_timer_interrupts_enabled(vcpu)) {
980 cputm = kvm_s390_get_cpu_timer(vcpu);
981 /* already expired? */
984 return min(sltime, tod_to_ns(cputm));
986 } else if (cpu_timer_interrupts_enabled(vcpu)) {
987 sltime = kvm_s390_get_cpu_timer(vcpu);
988 /* already expired? */
995 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
999 vcpu->stat.exit_wait_state++;
1002 if (kvm_arch_vcpu_runnable(vcpu))
1005 if (psw_interrupts_disabled(vcpu)) {
1006 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
1007 return -EOPNOTSUPP; /* disabled wait */
1010 if (!ckc_interrupts_enabled(vcpu) &&
1011 !cpu_timer_interrupts_enabled(vcpu)) {
1012 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
1013 __set_cpu_idle(vcpu);
1017 sltime = __calculate_sltime(vcpu);
1021 __set_cpu_idle(vcpu);
1022 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
1023 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
1025 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
1026 kvm_vcpu_block(vcpu);
1027 __unset_cpu_idle(vcpu);
1028 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1030 hrtimer_cancel(&vcpu->arch.ckc_timer);
1034 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
1037 * We cannot move this into the if, as the CPU might be already
1038 * in kvm_vcpu_block without having the waitqueue set (polling)
1040 vcpu->valid_wakeup = true;
1041 if (swait_active(&vcpu->wq)) {
1043 * The vcpu gave up the cpu voluntarily, mark it as a good
1046 vcpu->preempted = true;
1047 swake_up(&vcpu->wq);
1048 vcpu->stat.halt_wakeup++;
1051 * The VCPU might not be sleeping but is executing the VSIE. Let's
1052 * kick it, so it leaves the SIE to process the request.
1054 kvm_s390_vsie_kick(vcpu);
1057 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
1059 struct kvm_vcpu *vcpu;
1062 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
1063 sltime = __calculate_sltime(vcpu);
1066 * If the monotonic clock runs faster than the tod clock we might be
1067 * woken up too early and have to go back to sleep to avoid deadlocks.
1069 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime)))
1070 return HRTIMER_RESTART;
1071 kvm_s390_vcpu_wakeup(vcpu);
1072 return HRTIMER_NORESTART;
1075 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
1077 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1079 spin_lock(&li->lock);
1080 li->pending_irqs = 0;
1081 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
1082 memset(&li->irq, 0, sizeof(li->irq));
1083 spin_unlock(&li->lock);
1085 sca_clear_ext_call(vcpu);
1088 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
1090 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1093 unsigned long irq_type;
1096 __reset_intercept_indicators(vcpu);
1098 /* pending ckc conditions might have been invalidated */
1099 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1100 if (ckc_irq_pending(vcpu))
1101 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1103 /* pending cpu timer conditions might have been invalidated */
1104 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1105 if (cpu_timer_irq_pending(vcpu))
1106 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1108 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
1109 /* bits are in the order of interrupt priority */
1110 irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT);
1111 if (is_ioirq(irq_type)) {
1112 rc = __deliver_io(vcpu, irq_type);
1114 func = deliver_irq_funcs[irq_type];
1116 WARN_ON_ONCE(func == NULL);
1117 clear_bit(irq_type, &li->pending_irqs);
1124 set_intercept_indicators(vcpu);
1129 static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1131 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1133 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1134 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1135 irq->u.pgm.code, 0);
1137 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) {
1138 /* auto detection if no valid ILC was given */
1139 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK;
1140 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu);
1141 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID;
1144 if (irq->u.pgm.code == PGM_PER) {
1145 li->irq.pgm.code |= PGM_PER;
1146 li->irq.pgm.flags = irq->u.pgm.flags;
1147 /* only modify PER related information */
1148 li->irq.pgm.per_address = irq->u.pgm.per_address;
1149 li->irq.pgm.per_code = irq->u.pgm.per_code;
1150 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1151 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1152 } else if (!(irq->u.pgm.code & PGM_PER)) {
1153 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1155 li->irq.pgm.flags = irq->u.pgm.flags;
1156 /* only modify non-PER information */
1157 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1158 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1159 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1160 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1161 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1162 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1164 li->irq.pgm = irq->u.pgm;
1166 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
1170 static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1172 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1174 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1175 irq->u.ext.ext_params2);
1176 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1177 irq->u.ext.ext_params,
1178 irq->u.ext.ext_params2);
1180 li->irq.ext = irq->u.ext;
1181 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
1182 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1186 static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1188 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1189 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
1190 uint16_t src_id = irq->u.extcall.code;
1192 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
1194 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
1197 /* sending vcpu invalid */
1198 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
1201 if (sclp.has_sigpif)
1202 return sca_inject_ext_call(vcpu, src_id);
1204 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
1206 *extcall = irq->u.extcall;
1207 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1211 static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1213 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1214 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
1216 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
1217 irq->u.prefix.address);
1218 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
1219 irq->u.prefix.address, 0);
1221 if (!is_vcpu_stopped(vcpu))
1224 *prefix = irq->u.prefix;
1225 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
1229 #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
1230 static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1232 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1233 struct kvm_s390_stop_info *stop = &li->irq.stop;
1236 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
1238 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1241 if (is_vcpu_stopped(vcpu)) {
1242 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1243 rc = kvm_s390_store_status_unloaded(vcpu,
1244 KVM_S390_STORE_STATUS_NOADDR);
1248 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1250 stop->flags = irq->u.stop.flags;
1251 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
1255 static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
1256 struct kvm_s390_irq *irq)
1258 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1260 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
1261 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
1263 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
1267 static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
1268 struct kvm_s390_irq *irq)
1270 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1272 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
1274 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
1275 irq->u.emerg.code, 0);
1277 /* sending vcpu invalid */
1278 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1281 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
1282 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
1283 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1287 static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1289 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1290 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
1292 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
1294 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
1298 * Because repressible machine checks can be indicated along with
1299 * exigent machine checks (PoP, Chapter 11, Interruption action)
1300 * we need to combine cr14, mcic and external damage code.
1301 * Failing storage address and the logout area should not be or'ed
1302 * together, we just indicate the last occurrence of the corresponding
1305 mchk->cr14 |= irq->u.mchk.cr14;
1306 mchk->mcic |= irq->u.mchk.mcic;
1307 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1308 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1309 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1310 sizeof(mchk->fixed_logout));
1311 if (mchk->mcic & MCHK_EX_MASK)
1312 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1313 else if (mchk->mcic & MCHK_REP_MASK)
1314 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
1318 static int __inject_ckc(struct kvm_vcpu *vcpu)
1320 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1322 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
1323 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
1326 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1327 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1331 static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
1333 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1335 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
1336 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
1339 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1340 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1344 static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1347 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1348 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1349 struct kvm_s390_interrupt_info *iter;
1350 u16 id = (schid & 0xffff0000U) >> 16;
1351 u16 nr = schid & 0x0000ffffU;
1353 spin_lock(&fi->lock);
1354 list_for_each_entry(iter, isc_list, list) {
1355 if (schid && (id != iter->io.subchannel_id ||
1356 nr != iter->io.subchannel_nr))
1358 /* found an appropriate entry */
1359 list_del_init(&iter->list);
1360 fi->counters[FIRQ_CNTR_IO] -= 1;
1361 if (list_empty(isc_list))
1362 clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
1363 spin_unlock(&fi->lock);
1366 spin_unlock(&fi->lock);
1371 * Dequeue and return an I/O interrupt matching any of the interruption
1372 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
1374 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
1375 u64 isc_mask, u32 schid)
1377 struct kvm_s390_interrupt_info *inti = NULL;
1380 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1381 if (isc_mask & isc_to_isc_bits(isc))
1382 inti = get_io_int(kvm, isc, schid);
1387 #define SCCB_MASK 0xFFFFFFF8
1388 #define SCCB_EVENT_PENDING 0x3
1390 static int __inject_service(struct kvm *kvm,
1391 struct kvm_s390_interrupt_info *inti)
1393 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1395 spin_lock(&fi->lock);
1396 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1398 * Early versions of the QEMU s390 bios will inject several
1399 * service interrupts after another without handling a
1400 * condition code indicating busy.
1401 * We will silently ignore those superfluous sccb values.
1402 * A future version of QEMU will take care of serialization
1405 if (fi->srv_signal.ext_params & SCCB_MASK)
1407 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1408 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1410 spin_unlock(&fi->lock);
1415 static int __inject_virtio(struct kvm *kvm,
1416 struct kvm_s390_interrupt_info *inti)
1418 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1420 spin_lock(&fi->lock);
1421 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1422 spin_unlock(&fi->lock);
1425 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1426 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1427 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1428 spin_unlock(&fi->lock);
1432 static int __inject_pfault_done(struct kvm *kvm,
1433 struct kvm_s390_interrupt_info *inti)
1435 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1437 spin_lock(&fi->lock);
1438 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1439 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1440 spin_unlock(&fi->lock);
1443 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1444 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1445 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1446 spin_unlock(&fi->lock);
1450 #define CR_PENDING_SUBCLASS 28
1451 static int __inject_float_mchk(struct kvm *kvm,
1452 struct kvm_s390_interrupt_info *inti)
1454 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1456 spin_lock(&fi->lock);
1457 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1458 fi->mchk.mcic |= inti->mchk.mcic;
1459 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1460 spin_unlock(&fi->lock);
1465 static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1467 struct kvm_s390_float_interrupt *fi;
1468 struct list_head *list;
1471 fi = &kvm->arch.float_int;
1472 spin_lock(&fi->lock);
1473 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1474 spin_unlock(&fi->lock);
1477 fi->counters[FIRQ_CNTR_IO] += 1;
1479 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1480 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)");
1482 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x",
1483 inti->io.subchannel_id >> 8,
1484 inti->io.subchannel_id >> 1 & 0x3,
1485 inti->io.subchannel_nr);
1486 isc = int_word_to_isc(inti->io.io_int_word);
1487 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1488 list_add_tail(&inti->list, list);
1489 set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
1490 spin_unlock(&fi->lock);
1495 * Find a destination VCPU for a floating irq and kick it.
1497 static void __floating_irq_kick(struct kvm *kvm, u64 type)
1499 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1500 struct kvm_s390_local_interrupt *li;
1501 struct kvm_vcpu *dst_vcpu;
1502 int sigcpu, online_vcpus, nr_tries = 0;
1504 online_vcpus = atomic_read(&kvm->online_vcpus);
1508 /* find idle VCPUs first, then round robin */
1509 sigcpu = find_first_bit(fi->idle_mask, online_vcpus);
1510 if (sigcpu == online_vcpus) {
1512 sigcpu = fi->next_rr_cpu;
1513 fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus;
1514 /* avoid endless loops if all vcpus are stopped */
1515 if (nr_tries++ >= online_vcpus)
1517 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1519 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1521 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
1522 li = &dst_vcpu->arch.local_int;
1523 spin_lock(&li->lock);
1526 atomic_or(CPUSTAT_STOP_INT, li->cpuflags);
1528 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1529 atomic_or(CPUSTAT_IO_INT, li->cpuflags);
1532 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1535 spin_unlock(&li->lock);
1536 kvm_s390_vcpu_wakeup(dst_vcpu);
1539 static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1541 u64 type = READ_ONCE(inti->type);
1546 rc = __inject_float_mchk(kvm, inti);
1548 case KVM_S390_INT_VIRTIO:
1549 rc = __inject_virtio(kvm, inti);
1551 case KVM_S390_INT_SERVICE:
1552 rc = __inject_service(kvm, inti);
1554 case KVM_S390_INT_PFAULT_DONE:
1555 rc = __inject_pfault_done(kvm, inti);
1557 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1558 rc = __inject_io(kvm, inti);
1566 __floating_irq_kick(kvm, type);
1570 int kvm_s390_inject_vm(struct kvm *kvm,
1571 struct kvm_s390_interrupt *s390int)
1573 struct kvm_s390_interrupt_info *inti;
1576 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1580 inti->type = s390int->type;
1581 switch (inti->type) {
1582 case KVM_S390_INT_VIRTIO:
1583 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
1584 s390int->parm, s390int->parm64);
1585 inti->ext.ext_params = s390int->parm;
1586 inti->ext.ext_params2 = s390int->parm64;
1588 case KVM_S390_INT_SERVICE:
1589 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
1590 inti->ext.ext_params = s390int->parm;
1592 case KVM_S390_INT_PFAULT_DONE:
1593 inti->ext.ext_params2 = s390int->parm64;
1596 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
1598 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1599 inti->mchk.mcic = s390int->parm64;
1601 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1602 inti->io.subchannel_id = s390int->parm >> 16;
1603 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1604 inti->io.io_int_parm = s390int->parm64 >> 32;
1605 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1611 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1614 rc = __inject_vm(kvm, inti);
1620 int kvm_s390_reinject_io_int(struct kvm *kvm,
1621 struct kvm_s390_interrupt_info *inti)
1623 return __inject_vm(kvm, inti);
1626 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1627 struct kvm_s390_irq *irq)
1629 irq->type = s390int->type;
1630 switch (irq->type) {
1631 case KVM_S390_PROGRAM_INT:
1632 if (s390int->parm & 0xffff0000)
1634 irq->u.pgm.code = s390int->parm;
1636 case KVM_S390_SIGP_SET_PREFIX:
1637 irq->u.prefix.address = s390int->parm;
1639 case KVM_S390_SIGP_STOP:
1640 irq->u.stop.flags = s390int->parm;
1642 case KVM_S390_INT_EXTERNAL_CALL:
1643 if (s390int->parm & 0xffff0000)
1645 irq->u.extcall.code = s390int->parm;
1647 case KVM_S390_INT_EMERGENCY:
1648 if (s390int->parm & 0xffff0000)
1650 irq->u.emerg.code = s390int->parm;
1653 irq->u.mchk.mcic = s390int->parm64;
1659 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1661 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1663 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1666 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1668 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1670 spin_lock(&li->lock);
1671 li->irq.stop.flags = 0;
1672 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1673 spin_unlock(&li->lock);
1676 static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1680 switch (irq->type) {
1681 case KVM_S390_PROGRAM_INT:
1682 rc = __inject_prog(vcpu, irq);
1684 case KVM_S390_SIGP_SET_PREFIX:
1685 rc = __inject_set_prefix(vcpu, irq);
1687 case KVM_S390_SIGP_STOP:
1688 rc = __inject_sigp_stop(vcpu, irq);
1690 case KVM_S390_RESTART:
1691 rc = __inject_sigp_restart(vcpu, irq);
1693 case KVM_S390_INT_CLOCK_COMP:
1694 rc = __inject_ckc(vcpu);
1696 case KVM_S390_INT_CPU_TIMER:
1697 rc = __inject_cpu_timer(vcpu);
1699 case KVM_S390_INT_EXTERNAL_CALL:
1700 rc = __inject_extcall(vcpu, irq);
1702 case KVM_S390_INT_EMERGENCY:
1703 rc = __inject_sigp_emergency(vcpu, irq);
1706 rc = __inject_mchk(vcpu, irq);
1708 case KVM_S390_INT_PFAULT_INIT:
1709 rc = __inject_pfault_init(vcpu, irq);
1711 case KVM_S390_INT_VIRTIO:
1712 case KVM_S390_INT_SERVICE:
1713 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1721 int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1723 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1726 spin_lock(&li->lock);
1727 rc = do_inject_vcpu(vcpu, irq);
1728 spin_unlock(&li->lock);
1730 kvm_s390_vcpu_wakeup(vcpu);
1734 static inline void clear_irq_list(struct list_head *_list)
1736 struct kvm_s390_interrupt_info *inti, *n;
1738 list_for_each_entry_safe(inti, n, _list, list) {
1739 list_del(&inti->list);
1744 static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
1745 struct kvm_s390_irq *irq)
1747 irq->type = inti->type;
1748 switch (inti->type) {
1749 case KVM_S390_INT_PFAULT_INIT:
1750 case KVM_S390_INT_PFAULT_DONE:
1751 case KVM_S390_INT_VIRTIO:
1752 irq->u.ext = inti->ext;
1754 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1755 irq->u.io = inti->io;
1760 void kvm_s390_clear_float_irqs(struct kvm *kvm)
1762 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1765 spin_lock(&fi->lock);
1766 fi->pending_irqs = 0;
1767 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
1768 memset(&fi->mchk, 0, sizeof(fi->mchk));
1769 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1770 clear_irq_list(&fi->lists[i]);
1771 for (i = 0; i < FIRQ_MAX_COUNT; i++)
1772 fi->counters[i] = 0;
1773 spin_unlock(&fi->lock);
1776 static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
1778 struct kvm_s390_interrupt_info *inti;
1779 struct kvm_s390_float_interrupt *fi;
1780 struct kvm_s390_irq *buf;
1781 struct kvm_s390_irq *irq;
1787 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
1791 * We are already using -ENOMEM to signal
1792 * userspace it may retry with a bigger buffer,
1793 * so we need to use something else for this case
1799 max_irqs = len / sizeof(struct kvm_s390_irq);
1801 fi = &kvm->arch.float_int;
1802 spin_lock(&fi->lock);
1803 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
1804 list_for_each_entry(inti, &fi->lists[i], list) {
1805 if (n == max_irqs) {
1806 /* signal userspace to try again */
1810 inti_to_irq(inti, &buf[n]);
1814 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
1815 if (n == max_irqs) {
1816 /* signal userspace to try again */
1820 irq = (struct kvm_s390_irq *) &buf[n];
1821 irq->type = KVM_S390_INT_SERVICE;
1822 irq->u.ext = fi->srv_signal;
1825 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
1826 if (n == max_irqs) {
1827 /* signal userspace to try again */
1831 irq = (struct kvm_s390_irq *) &buf[n];
1832 irq->type = KVM_S390_MCHK;
1833 irq->u.mchk = fi->mchk;
1838 spin_unlock(&fi->lock);
1839 if (!ret && n > 0) {
1840 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
1845 return ret < 0 ? ret : n;
1848 static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1852 switch (attr->group) {
1853 case KVM_DEV_FLIC_GET_ALL_IRQS:
1854 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
1864 static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1867 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1868 void *target = NULL;
1869 void __user *source;
1872 if (get_user(inti->type, (u64 __user *)addr))
1875 switch (inti->type) {
1876 case KVM_S390_INT_PFAULT_INIT:
1877 case KVM_S390_INT_PFAULT_DONE:
1878 case KVM_S390_INT_VIRTIO:
1879 case KVM_S390_INT_SERVICE:
1880 target = (void *) &inti->ext;
1881 source = &uptr->u.ext;
1882 size = sizeof(inti->ext);
1884 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1885 target = (void *) &inti->io;
1886 source = &uptr->u.io;
1887 size = sizeof(inti->io);
1890 target = (void *) &inti->mchk;
1891 source = &uptr->u.mchk;
1892 size = sizeof(inti->mchk);
1898 if (copy_from_user(target, source, size))
1904 static int enqueue_floating_irq(struct kvm_device *dev,
1905 struct kvm_device_attr *attr)
1907 struct kvm_s390_interrupt_info *inti = NULL;
1909 int len = attr->attr;
1911 if (len % sizeof(struct kvm_s390_irq) != 0)
1913 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1916 while (len >= sizeof(struct kvm_s390_irq)) {
1917 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1921 r = copy_irq_from_user(inti, attr->addr);
1926 r = __inject_vm(dev->kvm, inti);
1931 len -= sizeof(struct kvm_s390_irq);
1932 attr->addr += sizeof(struct kvm_s390_irq);
1938 static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1940 if (id >= MAX_S390_IO_ADAPTERS)
1942 return kvm->arch.adapters[id];
1945 static int register_io_adapter(struct kvm_device *dev,
1946 struct kvm_device_attr *attr)
1948 struct s390_io_adapter *adapter;
1949 struct kvm_s390_io_adapter adapter_info;
1951 if (copy_from_user(&adapter_info,
1952 (void __user *)attr->addr, sizeof(adapter_info)))
1955 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1956 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1959 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1963 INIT_LIST_HEAD(&adapter->maps);
1964 init_rwsem(&adapter->maps_lock);
1965 atomic_set(&adapter->nr_maps, 0);
1966 adapter->id = adapter_info.id;
1967 adapter->isc = adapter_info.isc;
1968 adapter->maskable = adapter_info.maskable;
1969 adapter->masked = false;
1970 adapter->swap = adapter_info.swap;
1971 dev->kvm->arch.adapters[adapter->id] = adapter;
1976 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1979 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1981 if (!adapter || !adapter->maskable)
1983 ret = adapter->masked;
1984 adapter->masked = masked;
1988 static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1990 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1991 struct s390_map_info *map;
1994 if (!adapter || !addr)
1997 map = kzalloc(sizeof(*map), GFP_KERNEL);
2002 INIT_LIST_HEAD(&map->list);
2003 map->guest_addr = addr;
2004 map->addr = gmap_translate(kvm->arch.gmap, addr);
2005 if (map->addr == -EFAULT) {
2009 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
2013 down_write(&adapter->maps_lock);
2014 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
2015 list_add_tail(&map->list, &adapter->maps);
2018 put_page(map->page);
2021 up_write(&adapter->maps_lock);
2028 static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
2030 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2031 struct s390_map_info *map, *tmp;
2034 if (!adapter || !addr)
2037 down_write(&adapter->maps_lock);
2038 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
2039 if (map->guest_addr == addr) {
2041 atomic_dec(&adapter->nr_maps);
2042 list_del(&map->list);
2043 put_page(map->page);
2048 up_write(&adapter->maps_lock);
2050 return found ? 0 : -EINVAL;
2053 void kvm_s390_destroy_adapters(struct kvm *kvm)
2056 struct s390_map_info *map, *tmp;
2058 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
2059 if (!kvm->arch.adapters[i])
2061 list_for_each_entry_safe(map, tmp,
2062 &kvm->arch.adapters[i]->maps, list) {
2063 list_del(&map->list);
2064 put_page(map->page);
2067 kfree(kvm->arch.adapters[i]);
2071 static int modify_io_adapter(struct kvm_device *dev,
2072 struct kvm_device_attr *attr)
2074 struct kvm_s390_io_adapter_req req;
2075 struct s390_io_adapter *adapter;
2078 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2081 adapter = get_io_adapter(dev->kvm, req.id);
2085 case KVM_S390_IO_ADAPTER_MASK:
2086 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
2090 case KVM_S390_IO_ADAPTER_MAP:
2091 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
2093 case KVM_S390_IO_ADAPTER_UNMAP:
2094 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
2103 static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
2106 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
2111 if (attr->attr != sizeof(schid))
2113 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
2115 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
2117 * If userspace is conforming to the architecture, we can have at most
2118 * one pending I/O interrupt per subchannel, so this is effectively a
2124 static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2128 struct kvm_vcpu *vcpu;
2130 switch (attr->group) {
2131 case KVM_DEV_FLIC_ENQUEUE:
2132 r = enqueue_floating_irq(dev, attr);
2134 case KVM_DEV_FLIC_CLEAR_IRQS:
2135 kvm_s390_clear_float_irqs(dev->kvm);
2137 case KVM_DEV_FLIC_APF_ENABLE:
2138 dev->kvm->arch.gmap->pfault_enabled = 1;
2140 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2141 dev->kvm->arch.gmap->pfault_enabled = 0;
2143 * Make sure no async faults are in transition when
2144 * clearing the queues. So we don't need to worry
2145 * about late coming workers.
2147 synchronize_srcu(&dev->kvm->srcu);
2148 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2149 kvm_clear_async_pf_completion_queue(vcpu);
2151 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2152 r = register_io_adapter(dev, attr);
2154 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2155 r = modify_io_adapter(dev, attr);
2157 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2158 r = clear_io_irq(dev->kvm, attr);
2167 static int flic_has_attr(struct kvm_device *dev,
2168 struct kvm_device_attr *attr)
2170 switch (attr->group) {
2171 case KVM_DEV_FLIC_GET_ALL_IRQS:
2172 case KVM_DEV_FLIC_ENQUEUE:
2173 case KVM_DEV_FLIC_CLEAR_IRQS:
2174 case KVM_DEV_FLIC_APF_ENABLE:
2175 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2176 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2177 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2178 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2184 static int flic_create(struct kvm_device *dev, u32 type)
2188 if (dev->kvm->arch.flic)
2190 dev->kvm->arch.flic = dev;
2194 static void flic_destroy(struct kvm_device *dev)
2196 dev->kvm->arch.flic = NULL;
2200 /* s390 floating irq controller (flic) */
2201 struct kvm_device_ops kvm_flic_ops = {
2203 .get_attr = flic_get_attr,
2204 .set_attr = flic_set_attr,
2205 .has_attr = flic_has_attr,
2206 .create = flic_create,
2207 .destroy = flic_destroy,
2210 static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2214 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2216 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2219 static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2222 struct s390_map_info *map;
2227 list_for_each_entry(map, &adapter->maps, list) {
2228 if (map->guest_addr == addr)
2234 static int adapter_indicators_set(struct kvm *kvm,
2235 struct s390_io_adapter *adapter,
2236 struct kvm_s390_adapter_int *adapter_int)
2239 int summary_set, idx;
2240 struct s390_map_info *info;
2243 info = get_map_info(adapter, adapter_int->ind_addr);
2246 map = page_address(info->page);
2247 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2249 idx = srcu_read_lock(&kvm->srcu);
2250 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2251 set_page_dirty_lock(info->page);
2252 info = get_map_info(adapter, adapter_int->summary_addr);
2254 srcu_read_unlock(&kvm->srcu, idx);
2257 map = page_address(info->page);
2258 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2260 summary_set = test_and_set_bit(bit, map);
2261 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2262 set_page_dirty_lock(info->page);
2263 srcu_read_unlock(&kvm->srcu, idx);
2264 return summary_set ? 0 : 1;
2268 * < 0 - not injected due to error
2269 * = 0 - coalesced, summary indicator already active
2270 * > 0 - injected interrupt
2272 static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2273 struct kvm *kvm, int irq_source_id, int level,
2277 struct s390_io_adapter *adapter;
2279 /* We're only interested in the 0->1 transition. */
2282 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2285 down_read(&adapter->maps_lock);
2286 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2287 up_read(&adapter->maps_lock);
2288 if ((ret > 0) && !adapter->masked) {
2289 struct kvm_s390_interrupt s390int = {
2290 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2292 .parm64 = (adapter->isc << 27) | 0x80000000,
2294 ret = kvm_s390_inject_vm(kvm, &s390int);
2301 int kvm_set_routing_entry(struct kvm *kvm,
2302 struct kvm_kernel_irq_routing_entry *e,
2303 const struct kvm_irq_routing_entry *ue)
2308 case KVM_IRQ_ROUTING_S390_ADAPTER:
2309 e->set = set_adapter_int;
2310 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2311 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2312 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2313 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2314 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2324 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2325 int irq_source_id, int level, bool line_status)
2330 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2332 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2333 struct kvm_s390_irq *buf;
2341 if (copy_from_user((void *) buf, irqstate, len)) {
2347 * Don't allow setting the interrupt state
2348 * when there are already interrupts pending
2350 spin_lock(&li->lock);
2351 if (li->pending_irqs) {
2356 for (n = 0; n < len / sizeof(*buf); n++) {
2357 r = do_inject_vcpu(vcpu, &buf[n]);
2363 spin_unlock(&li->lock);
2370 static void store_local_irq(struct kvm_s390_local_interrupt *li,
2371 struct kvm_s390_irq *irq,
2372 unsigned long irq_type)
2375 case IRQ_PEND_MCHK_EX:
2376 case IRQ_PEND_MCHK_REP:
2377 irq->type = KVM_S390_MCHK;
2378 irq->u.mchk = li->irq.mchk;
2381 irq->type = KVM_S390_PROGRAM_INT;
2382 irq->u.pgm = li->irq.pgm;
2384 case IRQ_PEND_PFAULT_INIT:
2385 irq->type = KVM_S390_INT_PFAULT_INIT;
2386 irq->u.ext = li->irq.ext;
2388 case IRQ_PEND_EXT_EXTERNAL:
2389 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2390 irq->u.extcall = li->irq.extcall;
2392 case IRQ_PEND_EXT_CLOCK_COMP:
2393 irq->type = KVM_S390_INT_CLOCK_COMP;
2395 case IRQ_PEND_EXT_CPU_TIMER:
2396 irq->type = KVM_S390_INT_CPU_TIMER;
2398 case IRQ_PEND_SIGP_STOP:
2399 irq->type = KVM_S390_SIGP_STOP;
2400 irq->u.stop = li->irq.stop;
2402 case IRQ_PEND_RESTART:
2403 irq->type = KVM_S390_RESTART;
2405 case IRQ_PEND_SET_PREFIX:
2406 irq->type = KVM_S390_SIGP_SET_PREFIX;
2407 irq->u.prefix = li->irq.prefix;
2412 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2415 unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
2416 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2417 unsigned long pending_irqs;
2418 struct kvm_s390_irq irq;
2419 unsigned long irq_type;
2423 spin_lock(&li->lock);
2424 pending_irqs = li->pending_irqs;
2425 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2426 sizeof(sigp_emerg_pending));
2427 spin_unlock(&li->lock);
2429 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2430 memset(&irq, 0, sizeof(irq));
2431 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2433 if (n + sizeof(irq) > len)
2435 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2436 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2441 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2442 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2443 memset(&irq, 0, sizeof(irq));
2444 if (n + sizeof(irq) > len)
2446 irq.type = KVM_S390_INT_EMERGENCY;
2447 irq.u.emerg.code = cpuaddr;
2448 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2454 if (sca_ext_call_pending(vcpu, &scn)) {
2455 if (n + sizeof(irq) > len)
2457 memset(&irq, 0, sizeof(irq));
2458 irq.type = KVM_S390_INT_EXTERNAL_CALL;
2459 irq.u.extcall.code = scn;
2460 if (copy_to_user(&buf[n], &irq, sizeof(irq)))