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>
28 #include "trace-s390.h"
30 #define IOINT_SCHID_MASK 0x0000ffff
31 #define IOINT_SSID_MASK 0x00030000
32 #define IOINT_CSSID_MASK 0x03fc0000
33 #define IOINT_AI_MASK 0x04000000
34 #define PFAULT_INIT 0x0600
35 #define PFAULT_DONE 0x0680
36 #define VIRTIO_PARAM 0x0d00
38 int psw_extint_disabled(struct kvm_vcpu *vcpu)
40 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
43 static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
45 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
48 static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
50 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
53 static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
55 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
56 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
57 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
62 static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
64 if (psw_extint_disabled(vcpu) ||
65 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
67 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
68 /* No timer interrupts when single stepping */
73 static int ckc_irq_pending(struct kvm_vcpu *vcpu)
75 if (!(vcpu->arch.sie_block->ckc <
76 get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
78 return ckc_interrupts_enabled(vcpu);
81 static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
83 return !psw_extint_disabled(vcpu) &&
84 (vcpu->arch.sie_block->gcr[0] & 0x400ul);
87 static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
89 return (vcpu->arch.sie_block->cputm >> 63) &&
90 cpu_timer_interrupts_enabled(vcpu);
93 static inline int is_ioirq(unsigned long irq_type)
95 return ((irq_type >= IRQ_PEND_IO_ISC_0) &&
96 (irq_type <= IRQ_PEND_IO_ISC_7));
99 static uint64_t isc_to_isc_bits(int isc)
101 return (0x80 >> isc) << 24;
104 static inline u8 int_word_to_isc(u32 int_word)
106 return (int_word & 0x38000000) >> 27;
109 static inline unsigned long pending_floating_irqs(struct kvm_vcpu *vcpu)
111 return vcpu->kvm->arch.float_int.pending_irqs;
114 static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu)
116 return vcpu->arch.local_int.pending_irqs;
119 static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
120 unsigned long active_mask)
124 for (i = 0; i <= MAX_ISC; i++)
125 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
126 active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i));
131 static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
133 unsigned long active_mask;
135 active_mask = pending_local_irqs(vcpu);
136 active_mask |= pending_floating_irqs(vcpu);
138 if (psw_extint_disabled(vcpu))
139 active_mask &= ~IRQ_PEND_EXT_MASK;
140 if (psw_ioint_disabled(vcpu))
141 active_mask &= ~IRQ_PEND_IO_MASK;
143 active_mask = disable_iscs(vcpu, active_mask);
144 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
145 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
146 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
147 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
148 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
149 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
150 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
151 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
152 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
153 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
154 if (psw_mchk_disabled(vcpu))
155 active_mask &= ~IRQ_PEND_MCHK_MASK;
156 if (!(vcpu->arch.sie_block->gcr[14] &
157 vcpu->kvm->arch.float_int.mchk.cr14))
158 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
161 * STOP irqs will never be actively delivered. They are triggered via
162 * intercept requests and cleared when the stop intercept is performed.
164 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
169 static void __set_cpu_idle(struct kvm_vcpu *vcpu)
171 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
172 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
175 static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
177 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
178 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
181 static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
183 atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
184 &vcpu->arch.sie_block->cpuflags);
185 vcpu->arch.sie_block->lctl = 0x0000;
186 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
188 if (guestdbg_enabled(vcpu)) {
189 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
190 LCTL_CR10 | LCTL_CR11);
191 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
195 static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
197 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
200 static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
202 if (!(pending_floating_irqs(vcpu) & IRQ_PEND_IO_MASK))
204 else if (psw_ioint_disabled(vcpu))
205 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
207 vcpu->arch.sie_block->lctl |= LCTL_CR6;
210 static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
212 if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK))
214 if (psw_extint_disabled(vcpu))
215 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
217 vcpu->arch.sie_block->lctl |= LCTL_CR0;
220 static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
222 if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
224 if (psw_mchk_disabled(vcpu))
225 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
227 vcpu->arch.sie_block->lctl |= LCTL_CR14;
230 static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
232 if (kvm_s390_is_stop_irq_pending(vcpu))
233 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
236 /* Set interception request for non-deliverable interrupts */
237 static void set_intercept_indicators(struct kvm_vcpu *vcpu)
239 set_intercept_indicators_io(vcpu);
240 set_intercept_indicators_ext(vcpu);
241 set_intercept_indicators_mchk(vcpu);
242 set_intercept_indicators_stop(vcpu);
245 static u16 get_ilc(struct kvm_vcpu *vcpu)
247 switch (vcpu->arch.sie_block->icptcode) {
253 /* last instruction only stored for these icptcodes */
254 return insn_length(vcpu->arch.sie_block->ipa >> 8);
256 return vcpu->arch.sie_block->pgmilc;
262 static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
264 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
267 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
270 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
271 (u16 *)__LC_EXT_INT_CODE);
272 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
273 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
274 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
275 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
276 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
277 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
278 return rc ? -EFAULT : 0;
281 static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
283 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
286 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
289 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
290 (u16 __user *)__LC_EXT_INT_CODE);
291 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
292 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
293 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
294 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
295 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
296 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
297 return rc ? -EFAULT : 0;
300 static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
302 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
303 struct kvm_s390_ext_info ext;
306 spin_lock(&li->lock);
308 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
309 li->irq.ext.ext_params2 = 0;
310 spin_unlock(&li->lock);
312 VCPU_EVENT(vcpu, 4, "interrupt: pfault init parm:%x,parm64:%llx",
314 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
315 KVM_S390_INT_PFAULT_INIT,
318 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
319 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
320 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
321 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
322 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
323 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
324 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
325 return rc ? -EFAULT : 0;
328 static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
330 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
331 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
332 struct kvm_s390_mchk_info mchk = {};
333 unsigned long adtl_status_addr;
337 spin_lock(&fi->lock);
338 spin_lock(&li->lock);
339 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
340 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
342 * If there was an exigent machine check pending, then any
343 * repressible machine checks that might have been pending
344 * are indicated along with it, so always clear bits for
345 * repressible and exigent interrupts
348 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
349 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
350 memset(&li->irq.mchk, 0, sizeof(mchk));
354 * We indicate floating repressible conditions along with
355 * other pending conditions. Channel Report Pending and Channel
356 * Subsystem damage are the only two and and are indicated by
357 * bits in mcic and masked in cr14.
359 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
360 mchk.mcic |= fi->mchk.mcic;
361 mchk.cr14 |= fi->mchk.cr14;
362 memset(&fi->mchk, 0, sizeof(mchk));
365 spin_unlock(&li->lock);
366 spin_unlock(&fi->lock);
369 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
371 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
373 mchk.cr14, mchk.mcic);
375 rc = kvm_s390_vcpu_store_status(vcpu,
376 KVM_S390_STORE_STATUS_PREFIXED);
377 rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR,
379 sizeof(unsigned long));
380 rc |= kvm_s390_vcpu_store_adtl_status(vcpu,
382 rc |= put_guest_lc(vcpu, mchk.mcic,
383 (u64 __user *) __LC_MCCK_CODE);
384 rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
385 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
386 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
388 sizeof(mchk.fixed_logout));
389 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
390 &vcpu->arch.sie_block->gpsw,
392 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
393 &vcpu->arch.sie_block->gpsw,
396 return rc ? -EFAULT : 0;
399 static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
401 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
404 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
405 vcpu->stat.deliver_restart_signal++;
406 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
408 rc = write_guest_lc(vcpu,
409 offsetof(struct _lowcore, restart_old_psw),
410 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
411 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
412 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
413 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
414 return rc ? -EFAULT : 0;
417 static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
419 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
420 struct kvm_s390_prefix_info prefix;
422 spin_lock(&li->lock);
423 prefix = li->irq.prefix;
424 li->irq.prefix.address = 0;
425 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
426 spin_unlock(&li->lock);
428 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", prefix.address);
429 vcpu->stat.deliver_prefix_signal++;
430 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
431 KVM_S390_SIGP_SET_PREFIX,
434 kvm_s390_set_prefix(vcpu, prefix.address);
438 static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
440 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
444 spin_lock(&li->lock);
445 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
446 clear_bit(cpu_addr, li->sigp_emerg_pending);
447 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
448 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
449 spin_unlock(&li->lock);
451 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
452 vcpu->stat.deliver_emergency_signal++;
453 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
456 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
457 (u16 *)__LC_EXT_INT_CODE);
458 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
459 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
460 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
461 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
462 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
463 return rc ? -EFAULT : 0;
466 static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
468 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
469 struct kvm_s390_extcall_info extcall;
472 spin_lock(&li->lock);
473 extcall = li->irq.extcall;
474 li->irq.extcall.code = 0;
475 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
476 spin_unlock(&li->lock);
478 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
479 vcpu->stat.deliver_external_call++;
480 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
481 KVM_S390_INT_EXTERNAL_CALL,
484 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
485 (u16 *)__LC_EXT_INT_CODE);
486 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
487 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
488 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
489 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
491 return rc ? -EFAULT : 0;
494 static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
496 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
497 struct kvm_s390_pgm_info pgm_info;
498 int rc = 0, nullifying = false;
499 u16 ilc = get_ilc(vcpu);
501 spin_lock(&li->lock);
502 pgm_info = li->irq.pgm;
503 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
504 memset(&li->irq.pgm, 0, sizeof(pgm_info));
505 spin_unlock(&li->lock);
507 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
509 vcpu->stat.deliver_program_int++;
510 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
513 switch (pgm_info.code & ~PGM_PER) {
514 case PGM_AFX_TRANSLATION:
515 case PGM_ASX_TRANSLATION:
516 case PGM_EX_TRANSLATION:
517 case PGM_LFX_TRANSLATION:
518 case PGM_LSTE_SEQUENCE:
519 case PGM_LSX_TRANSLATION:
520 case PGM_LX_TRANSLATION:
521 case PGM_PRIMARY_AUTHORITY:
522 case PGM_SECONDARY_AUTHORITY:
525 case PGM_SPACE_SWITCH:
526 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
527 (u64 *)__LC_TRANS_EXC_CODE);
529 case PGM_ALEN_TRANSLATION:
530 case PGM_ALE_SEQUENCE:
531 case PGM_ASTE_INSTANCE:
532 case PGM_ASTE_SEQUENCE:
533 case PGM_ASTE_VALIDITY:
534 case PGM_EXTENDED_AUTHORITY:
535 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
536 (u8 *)__LC_EXC_ACCESS_ID);
540 case PGM_PAGE_TRANSLATION:
541 case PGM_REGION_FIRST_TRANS:
542 case PGM_REGION_SECOND_TRANS:
543 case PGM_REGION_THIRD_TRANS:
544 case PGM_SEGMENT_TRANSLATION:
545 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
546 (u64 *)__LC_TRANS_EXC_CODE);
547 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
548 (u8 *)__LC_EXC_ACCESS_ID);
549 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
550 (u8 *)__LC_OP_ACCESS_ID);
554 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
555 (u16 *)__LC_MON_CLASS_NR);
556 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
557 (u64 *)__LC_MON_CODE);
559 case PGM_VECTOR_PROCESSING:
561 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
562 (u32 *)__LC_DATA_EXC_CODE);
565 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
566 (u64 *)__LC_TRANS_EXC_CODE);
567 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
568 (u8 *)__LC_EXC_ACCESS_ID);
571 case PGM_STACK_EMPTY:
572 case PGM_STACK_SPECIFICATION:
574 case PGM_STACK_OPERATION:
575 case PGM_TRACE_TABEL:
576 case PGM_CRYPTO_OPERATION:
581 if (pgm_info.code & PGM_PER) {
582 rc |= put_guest_lc(vcpu, pgm_info.per_code,
583 (u8 *) __LC_PER_CODE);
584 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
585 (u8 *)__LC_PER_ATMID);
586 rc |= put_guest_lc(vcpu, pgm_info.per_address,
587 (u64 *) __LC_PER_ADDRESS);
588 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
589 (u8 *) __LC_PER_ACCESS_ID);
592 if (nullifying && vcpu->arch.sie_block->icptcode == ICPT_INST)
593 kvm_s390_rewind_psw(vcpu, ilc);
595 rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
596 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
597 (u64 *) __LC_LAST_BREAK);
598 rc |= put_guest_lc(vcpu, pgm_info.code,
599 (u16 *)__LC_PGM_INT_CODE);
600 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
601 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
602 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
603 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
604 return rc ? -EFAULT : 0;
607 static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
609 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
610 struct kvm_s390_ext_info ext;
613 spin_lock(&fi->lock);
614 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
615 spin_unlock(&fi->lock);
618 ext = fi->srv_signal;
619 memset(&fi->srv_signal, 0, sizeof(ext));
620 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
621 spin_unlock(&fi->lock);
623 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
625 vcpu->stat.deliver_service_signal++;
626 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
629 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
630 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
631 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
632 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
633 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
634 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
635 rc |= put_guest_lc(vcpu, ext.ext_params,
636 (u32 *)__LC_EXT_PARAMS);
638 return rc ? -EFAULT : 0;
641 static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
643 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
644 struct kvm_s390_interrupt_info *inti;
647 spin_lock(&fi->lock);
648 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
649 struct kvm_s390_interrupt_info,
652 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
653 KVM_S390_INT_PFAULT_DONE, 0,
654 inti->ext.ext_params2);
655 list_del(&inti->list);
656 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
658 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
659 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
660 spin_unlock(&fi->lock);
663 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
664 (u16 *)__LC_EXT_INT_CODE);
665 rc |= put_guest_lc(vcpu, PFAULT_DONE,
666 (u16 *)__LC_EXT_CPU_ADDR);
667 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
668 &vcpu->arch.sie_block->gpsw,
670 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
671 &vcpu->arch.sie_block->gpsw,
673 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
674 (u64 *)__LC_EXT_PARAMS2);
677 return rc ? -EFAULT : 0;
680 static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
682 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
683 struct kvm_s390_interrupt_info *inti;
686 spin_lock(&fi->lock);
687 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
688 struct kvm_s390_interrupt_info,
692 "interrupt: virtio parm:%x,parm64:%llx",
693 inti->ext.ext_params, inti->ext.ext_params2);
694 vcpu->stat.deliver_virtio_interrupt++;
695 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
697 inti->ext.ext_params,
698 inti->ext.ext_params2);
699 list_del(&inti->list);
700 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
702 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
703 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
704 spin_unlock(&fi->lock);
707 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
708 (u16 *)__LC_EXT_INT_CODE);
709 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
710 (u16 *)__LC_EXT_CPU_ADDR);
711 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
712 &vcpu->arch.sie_block->gpsw,
714 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
715 &vcpu->arch.sie_block->gpsw,
717 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
718 (u32 *)__LC_EXT_PARAMS);
719 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
720 (u64 *)__LC_EXT_PARAMS2);
723 return rc ? -EFAULT : 0;
726 static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
727 unsigned long irq_type)
729 struct list_head *isc_list;
730 struct kvm_s390_float_interrupt *fi;
731 struct kvm_s390_interrupt_info *inti = NULL;
734 fi = &vcpu->kvm->arch.float_int;
736 spin_lock(&fi->lock);
737 isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0];
738 inti = list_first_entry_or_null(isc_list,
739 struct kvm_s390_interrupt_info,
742 VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
743 vcpu->stat.deliver_io_int++;
744 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
746 ((__u32)inti->io.subchannel_id << 16) |
747 inti->io.subchannel_nr,
748 ((__u64)inti->io.io_int_parm << 32) |
749 inti->io.io_int_word);
750 list_del(&inti->list);
751 fi->counters[FIRQ_CNTR_IO] -= 1;
753 if (list_empty(isc_list))
754 clear_bit(irq_type, &fi->pending_irqs);
755 spin_unlock(&fi->lock);
758 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
759 (u16 *)__LC_SUBCHANNEL_ID);
760 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
761 (u16 *)__LC_SUBCHANNEL_NR);
762 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
763 (u32 *)__LC_IO_INT_PARM);
764 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
765 (u32 *)__LC_IO_INT_WORD);
766 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
767 &vcpu->arch.sie_block->gpsw,
769 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
770 &vcpu->arch.sie_block->gpsw,
775 return rc ? -EFAULT : 0;
778 typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
780 static const deliver_irq_t deliver_irq_funcs[] = {
781 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
782 [IRQ_PEND_MCHK_REP] = __deliver_machine_check,
783 [IRQ_PEND_PROG] = __deliver_prog,
784 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
785 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
786 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
787 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
788 [IRQ_PEND_RESTART] = __deliver_restart,
789 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
790 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
791 [IRQ_PEND_EXT_SERVICE] = __deliver_service,
792 [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done,
793 [IRQ_PEND_VIRTIO] = __deliver_virtio,
796 /* Check whether an external call is pending (deliverable or not) */
797 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
799 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
800 uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
802 if (!sclp_has_sigpif())
803 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
805 return (sigp_ctrl & SIGP_CTRL_C) &&
806 (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND);
809 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
813 rc = !!deliverable_irqs(vcpu);
815 if (!rc && kvm_cpu_has_pending_timer(vcpu))
818 /* external call pending and deliverable */
819 if (!rc && kvm_s390_ext_call_pending(vcpu) &&
820 !psw_extint_disabled(vcpu) &&
821 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
824 if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
830 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
832 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
835 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
839 vcpu->stat.exit_wait_state++;
842 if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu))
845 if (psw_interrupts_disabled(vcpu)) {
846 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
847 return -EOPNOTSUPP; /* disabled wait */
850 if (!ckc_interrupts_enabled(vcpu)) {
851 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
852 __set_cpu_idle(vcpu);
856 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
857 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
860 if (vcpu->arch.sie_block->ckc < now)
863 __set_cpu_idle(vcpu);
864 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
865 VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
867 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
868 kvm_vcpu_block(vcpu);
869 __unset_cpu_idle(vcpu);
870 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
872 hrtimer_cancel(&vcpu->arch.ckc_timer);
876 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
878 if (waitqueue_active(&vcpu->wq)) {
880 * The vcpu gave up the cpu voluntarily, mark it as a good
883 vcpu->preempted = true;
884 wake_up_interruptible(&vcpu->wq);
885 vcpu->stat.halt_wakeup++;
889 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
891 struct kvm_vcpu *vcpu;
894 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
895 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
896 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
899 * If the monotonic clock runs faster than the tod clock we might be
900 * woken up too early and have to go back to sleep to avoid deadlocks.
902 if (vcpu->arch.sie_block->ckc > now &&
903 hrtimer_forward_now(timer, ns_to_ktime(sltime)))
904 return HRTIMER_RESTART;
905 kvm_s390_vcpu_wakeup(vcpu);
906 return HRTIMER_NORESTART;
909 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
911 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
913 spin_lock(&li->lock);
914 li->pending_irqs = 0;
915 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
916 memset(&li->irq, 0, sizeof(li->irq));
917 spin_unlock(&li->lock);
919 /* clear pending external calls set by sigp interpretation facility */
920 atomic_clear_mask(CPUSTAT_ECALL_PEND, li->cpuflags);
921 vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0;
924 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
926 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
929 unsigned long irq_type;
932 __reset_intercept_indicators(vcpu);
934 /* pending ckc conditions might have been invalidated */
935 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
936 if (ckc_irq_pending(vcpu))
937 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
939 /* pending cpu timer conditions might have been invalidated */
940 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
941 if (cpu_timer_irq_pending(vcpu))
942 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
945 irqs = deliverable_irqs(vcpu);
946 /* bits are in the order of interrupt priority */
947 irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT);
948 if (irq_type == IRQ_PEND_COUNT)
950 if (is_ioirq(irq_type)) {
951 rc = __deliver_io(vcpu, irq_type);
953 func = deliver_irq_funcs[irq_type];
955 WARN_ON_ONCE(func == NULL);
956 clear_bit(irq_type, &li->pending_irqs);
965 set_intercept_indicators(vcpu);
970 static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
972 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
974 li->irq.pgm = irq->u.pgm;
975 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
979 int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
981 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
982 struct kvm_s390_irq irq;
984 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
985 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, code,
987 spin_lock(&li->lock);
988 irq.u.pgm.code = code;
989 __inject_prog(vcpu, &irq);
990 BUG_ON(waitqueue_active(li->wq));
991 spin_unlock(&li->lock);
995 int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
996 struct kvm_s390_pgm_info *pgm_info)
998 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
999 struct kvm_s390_irq irq;
1002 VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
1004 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1005 pgm_info->code, 0, 1);
1006 spin_lock(&li->lock);
1007 irq.u.pgm = *pgm_info;
1008 rc = __inject_prog(vcpu, &irq);
1009 BUG_ON(waitqueue_active(li->wq));
1010 spin_unlock(&li->lock);
1014 static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1016 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1018 VCPU_EVENT(vcpu, 3, "inject: external irq params:%x, params2:%llx",
1019 irq->u.ext.ext_params, irq->u.ext.ext_params2);
1020 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1021 irq->u.ext.ext_params,
1022 irq->u.ext.ext_params2, 2);
1024 li->irq.ext = irq->u.ext;
1025 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
1026 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1030 static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id)
1032 unsigned char new_val, old_val;
1033 uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
1035 new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK);
1036 old_val = *sigp_ctrl & ~SIGP_CTRL_C;
1037 if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) {
1038 /* another external call is pending */
1041 atomic_set_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
1045 static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1047 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1048 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
1049 uint16_t src_id = irq->u.extcall.code;
1051 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
1053 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
1056 /* sending vcpu invalid */
1057 if (src_id >= KVM_MAX_VCPUS ||
1058 kvm_get_vcpu(vcpu->kvm, src_id) == NULL)
1061 if (sclp_has_sigpif())
1062 return __inject_extcall_sigpif(vcpu, src_id);
1064 if (!test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
1066 *extcall = irq->u.extcall;
1067 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1071 static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1073 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1074 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
1076 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
1077 irq->u.prefix.address);
1078 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
1079 irq->u.prefix.address, 0, 2);
1081 if (!is_vcpu_stopped(vcpu))
1084 *prefix = irq->u.prefix;
1085 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
1089 #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
1090 static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1092 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1093 struct kvm_s390_stop_info *stop = &li->irq.stop;
1096 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0, 2);
1098 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1101 if (is_vcpu_stopped(vcpu)) {
1102 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1103 rc = kvm_s390_store_status_unloaded(vcpu,
1104 KVM_S390_STORE_STATUS_NOADDR);
1108 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1110 stop->flags = irq->u.stop.flags;
1111 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
1115 static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
1116 struct kvm_s390_irq *irq)
1118 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1120 VCPU_EVENT(vcpu, 3, "inject: restart type %llx", irq->type);
1121 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0, 2);
1123 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
1127 static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
1128 struct kvm_s390_irq *irq)
1130 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1132 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n",
1134 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
1135 irq->u.emerg.code, 0, 2);
1137 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
1138 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
1139 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1143 static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1145 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1146 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
1148 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
1150 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
1151 irq->u.mchk.mcic, 2);
1154 * Because repressible machine checks can be indicated along with
1155 * exigent machine checks (PoP, Chapter 11, Interruption action)
1156 * we need to combine cr14, mcic and external damage code.
1157 * Failing storage address and the logout area should not be or'ed
1158 * together, we just indicate the last occurrence of the corresponding
1161 mchk->cr14 |= irq->u.mchk.cr14;
1162 mchk->mcic |= irq->u.mchk.mcic;
1163 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1164 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1165 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1166 sizeof(mchk->fixed_logout));
1167 if (mchk->mcic & MCHK_EX_MASK)
1168 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1169 else if (mchk->mcic & MCHK_REP_MASK)
1170 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
1174 static int __inject_ckc(struct kvm_vcpu *vcpu)
1176 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1178 VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CLOCK_COMP);
1179 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
1182 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1183 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1187 static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
1189 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1191 VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CPU_TIMER);
1192 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
1195 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1196 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1200 static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1203 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1204 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1205 struct kvm_s390_interrupt_info *iter;
1206 u16 id = (schid & 0xffff0000U) >> 16;
1207 u16 nr = schid & 0x0000ffffU;
1209 spin_lock(&fi->lock);
1210 list_for_each_entry(iter, isc_list, list) {
1211 if (schid && (id != iter->io.subchannel_id ||
1212 nr != iter->io.subchannel_nr))
1214 /* found an appropriate entry */
1215 list_del_init(&iter->list);
1216 fi->counters[FIRQ_CNTR_IO] -= 1;
1217 if (list_empty(isc_list))
1218 clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
1219 spin_unlock(&fi->lock);
1222 spin_unlock(&fi->lock);
1227 * Dequeue and return an I/O interrupt matching any of the interruption
1228 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
1230 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
1231 u64 isc_mask, u32 schid)
1233 struct kvm_s390_interrupt_info *inti = NULL;
1236 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1237 if (isc_mask & isc_to_isc_bits(isc))
1238 inti = get_io_int(kvm, isc, schid);
1243 #define SCCB_MASK 0xFFFFFFF8
1244 #define SCCB_EVENT_PENDING 0x3
1246 static int __inject_service(struct kvm *kvm,
1247 struct kvm_s390_interrupt_info *inti)
1249 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1251 spin_lock(&fi->lock);
1252 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1254 * Early versions of the QEMU s390 bios will inject several
1255 * service interrupts after another without handling a
1256 * condition code indicating busy.
1257 * We will silently ignore those superfluous sccb values.
1258 * A future version of QEMU will take care of serialization
1261 if (fi->srv_signal.ext_params & SCCB_MASK)
1263 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1264 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1266 spin_unlock(&fi->lock);
1271 static int __inject_virtio(struct kvm *kvm,
1272 struct kvm_s390_interrupt_info *inti)
1274 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1276 spin_lock(&fi->lock);
1277 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1278 spin_unlock(&fi->lock);
1281 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1282 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1283 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1284 spin_unlock(&fi->lock);
1288 static int __inject_pfault_done(struct kvm *kvm,
1289 struct kvm_s390_interrupt_info *inti)
1291 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1293 spin_lock(&fi->lock);
1294 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1295 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1296 spin_unlock(&fi->lock);
1299 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1300 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1301 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1302 spin_unlock(&fi->lock);
1306 #define CR_PENDING_SUBCLASS 28
1307 static int __inject_float_mchk(struct kvm *kvm,
1308 struct kvm_s390_interrupt_info *inti)
1310 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1312 spin_lock(&fi->lock);
1313 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1314 fi->mchk.mcic |= inti->mchk.mcic;
1315 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1316 spin_unlock(&fi->lock);
1321 static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1323 struct kvm_s390_float_interrupt *fi;
1324 struct list_head *list;
1327 fi = &kvm->arch.float_int;
1328 spin_lock(&fi->lock);
1329 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1330 spin_unlock(&fi->lock);
1333 fi->counters[FIRQ_CNTR_IO] += 1;
1335 isc = int_word_to_isc(inti->io.io_int_word);
1336 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1337 list_add_tail(&inti->list, list);
1338 set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
1339 spin_unlock(&fi->lock);
1343 static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1345 struct kvm_s390_local_interrupt *li;
1346 struct kvm_s390_float_interrupt *fi;
1347 struct kvm_vcpu *dst_vcpu = NULL;
1349 u64 type = READ_ONCE(inti->type);
1352 fi = &kvm->arch.float_int;
1356 rc = __inject_float_mchk(kvm, inti);
1358 case KVM_S390_INT_VIRTIO:
1359 rc = __inject_virtio(kvm, inti);
1361 case KVM_S390_INT_SERVICE:
1362 rc = __inject_service(kvm, inti);
1364 case KVM_S390_INT_PFAULT_DONE:
1365 rc = __inject_pfault_done(kvm, inti);
1367 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1368 rc = __inject_io(kvm, inti);
1376 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
1377 if (sigcpu == KVM_MAX_VCPUS) {
1379 sigcpu = fi->next_rr_cpu++;
1380 if (sigcpu == KVM_MAX_VCPUS)
1381 sigcpu = fi->next_rr_cpu = 0;
1382 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
1384 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1385 li = &dst_vcpu->arch.local_int;
1386 spin_lock(&li->lock);
1389 atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
1391 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1392 atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
1395 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1398 spin_unlock(&li->lock);
1399 kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
1404 int kvm_s390_inject_vm(struct kvm *kvm,
1405 struct kvm_s390_interrupt *s390int)
1407 struct kvm_s390_interrupt_info *inti;
1410 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1414 inti->type = s390int->type;
1415 switch (inti->type) {
1416 case KVM_S390_INT_VIRTIO:
1417 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
1418 s390int->parm, s390int->parm64);
1419 inti->ext.ext_params = s390int->parm;
1420 inti->ext.ext_params2 = s390int->parm64;
1422 case KVM_S390_INT_SERVICE:
1423 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
1424 inti->ext.ext_params = s390int->parm;
1426 case KVM_S390_INT_PFAULT_DONE:
1427 inti->ext.ext_params2 = s390int->parm64;
1430 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
1432 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1433 inti->mchk.mcic = s390int->parm64;
1435 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1436 if (inti->type & IOINT_AI_MASK)
1437 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
1439 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
1440 s390int->type & IOINT_CSSID_MASK,
1441 s390int->type & IOINT_SSID_MASK,
1442 s390int->type & IOINT_SCHID_MASK);
1443 inti->io.subchannel_id = s390int->parm >> 16;
1444 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1445 inti->io.io_int_parm = s390int->parm64 >> 32;
1446 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1452 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1455 rc = __inject_vm(kvm, inti);
1461 int kvm_s390_reinject_io_int(struct kvm *kvm,
1462 struct kvm_s390_interrupt_info *inti)
1464 return __inject_vm(kvm, inti);
1467 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1468 struct kvm_s390_irq *irq)
1470 irq->type = s390int->type;
1471 switch (irq->type) {
1472 case KVM_S390_PROGRAM_INT:
1473 if (s390int->parm & 0xffff0000)
1475 irq->u.pgm.code = s390int->parm;
1477 case KVM_S390_SIGP_SET_PREFIX:
1478 irq->u.prefix.address = s390int->parm;
1480 case KVM_S390_SIGP_STOP:
1481 irq->u.stop.flags = s390int->parm;
1483 case KVM_S390_INT_EXTERNAL_CALL:
1484 if (s390int->parm & 0xffff0000)
1486 irq->u.extcall.code = s390int->parm;
1488 case KVM_S390_INT_EMERGENCY:
1489 if (s390int->parm & 0xffff0000)
1491 irq->u.emerg.code = s390int->parm;
1494 irq->u.mchk.mcic = s390int->parm64;
1500 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1502 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1504 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1507 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1509 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1511 spin_lock(&li->lock);
1512 li->irq.stop.flags = 0;
1513 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1514 spin_unlock(&li->lock);
1517 static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1521 switch (irq->type) {
1522 case KVM_S390_PROGRAM_INT:
1523 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
1525 rc = __inject_prog(vcpu, irq);
1527 case KVM_S390_SIGP_SET_PREFIX:
1528 rc = __inject_set_prefix(vcpu, irq);
1530 case KVM_S390_SIGP_STOP:
1531 rc = __inject_sigp_stop(vcpu, irq);
1533 case KVM_S390_RESTART:
1534 rc = __inject_sigp_restart(vcpu, irq);
1536 case KVM_S390_INT_CLOCK_COMP:
1537 rc = __inject_ckc(vcpu);
1539 case KVM_S390_INT_CPU_TIMER:
1540 rc = __inject_cpu_timer(vcpu);
1542 case KVM_S390_INT_EXTERNAL_CALL:
1543 rc = __inject_extcall(vcpu, irq);
1545 case KVM_S390_INT_EMERGENCY:
1546 rc = __inject_sigp_emergency(vcpu, irq);
1549 rc = __inject_mchk(vcpu, irq);
1551 case KVM_S390_INT_PFAULT_INIT:
1552 rc = __inject_pfault_init(vcpu, irq);
1554 case KVM_S390_INT_VIRTIO:
1555 case KVM_S390_INT_SERVICE:
1556 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1564 int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1566 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1569 spin_lock(&li->lock);
1570 rc = do_inject_vcpu(vcpu, irq);
1571 spin_unlock(&li->lock);
1573 kvm_s390_vcpu_wakeup(vcpu);
1577 static inline void clear_irq_list(struct list_head *_list)
1579 struct kvm_s390_interrupt_info *inti, *n;
1581 list_for_each_entry_safe(inti, n, _list, list) {
1582 list_del(&inti->list);
1587 static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
1588 struct kvm_s390_irq *irq)
1590 irq->type = inti->type;
1591 switch (inti->type) {
1592 case KVM_S390_INT_PFAULT_INIT:
1593 case KVM_S390_INT_PFAULT_DONE:
1594 case KVM_S390_INT_VIRTIO:
1595 irq->u.ext = inti->ext;
1597 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1598 irq->u.io = inti->io;
1603 void kvm_s390_clear_float_irqs(struct kvm *kvm)
1605 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1608 spin_lock(&fi->lock);
1609 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1610 clear_irq_list(&fi->lists[i]);
1611 for (i = 0; i < FIRQ_MAX_COUNT; i++)
1612 fi->counters[i] = 0;
1613 spin_unlock(&fi->lock);
1616 static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
1618 struct kvm_s390_interrupt_info *inti;
1619 struct kvm_s390_float_interrupt *fi;
1620 struct kvm_s390_irq *buf;
1621 struct kvm_s390_irq *irq;
1627 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
1631 * We are already using -ENOMEM to signal
1632 * userspace it may retry with a bigger buffer,
1633 * so we need to use something else for this case
1639 max_irqs = len / sizeof(struct kvm_s390_irq);
1641 fi = &kvm->arch.float_int;
1642 spin_lock(&fi->lock);
1643 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
1644 list_for_each_entry(inti, &fi->lists[i], list) {
1645 if (n == max_irqs) {
1646 /* signal userspace to try again */
1650 inti_to_irq(inti, &buf[n]);
1654 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
1655 if (n == max_irqs) {
1656 /* signal userspace to try again */
1660 irq = (struct kvm_s390_irq *) &buf[n];
1661 irq->type = KVM_S390_INT_SERVICE;
1662 irq->u.ext = fi->srv_signal;
1665 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
1666 if (n == max_irqs) {
1667 /* signal userspace to try again */
1671 irq = (struct kvm_s390_irq *) &buf[n];
1672 irq->type = KVM_S390_MCHK;
1673 irq->u.mchk = fi->mchk;
1678 spin_unlock(&fi->lock);
1679 if (!ret && n > 0) {
1680 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
1685 return ret < 0 ? ret : n;
1688 static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1692 switch (attr->group) {
1693 case KVM_DEV_FLIC_GET_ALL_IRQS:
1694 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
1704 static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1707 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1708 void *target = NULL;
1709 void __user *source;
1712 if (get_user(inti->type, (u64 __user *)addr))
1715 switch (inti->type) {
1716 case KVM_S390_INT_PFAULT_INIT:
1717 case KVM_S390_INT_PFAULT_DONE:
1718 case KVM_S390_INT_VIRTIO:
1719 case KVM_S390_INT_SERVICE:
1720 target = (void *) &inti->ext;
1721 source = &uptr->u.ext;
1722 size = sizeof(inti->ext);
1724 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1725 target = (void *) &inti->io;
1726 source = &uptr->u.io;
1727 size = sizeof(inti->io);
1730 target = (void *) &inti->mchk;
1731 source = &uptr->u.mchk;
1732 size = sizeof(inti->mchk);
1738 if (copy_from_user(target, source, size))
1744 static int enqueue_floating_irq(struct kvm_device *dev,
1745 struct kvm_device_attr *attr)
1747 struct kvm_s390_interrupt_info *inti = NULL;
1749 int len = attr->attr;
1751 if (len % sizeof(struct kvm_s390_irq) != 0)
1753 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1756 while (len >= sizeof(struct kvm_s390_irq)) {
1757 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1761 r = copy_irq_from_user(inti, attr->addr);
1766 r = __inject_vm(dev->kvm, inti);
1771 len -= sizeof(struct kvm_s390_irq);
1772 attr->addr += sizeof(struct kvm_s390_irq);
1778 static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1780 if (id >= MAX_S390_IO_ADAPTERS)
1782 return kvm->arch.adapters[id];
1785 static int register_io_adapter(struct kvm_device *dev,
1786 struct kvm_device_attr *attr)
1788 struct s390_io_adapter *adapter;
1789 struct kvm_s390_io_adapter adapter_info;
1791 if (copy_from_user(&adapter_info,
1792 (void __user *)attr->addr, sizeof(adapter_info)))
1795 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1796 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1799 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1803 INIT_LIST_HEAD(&adapter->maps);
1804 init_rwsem(&adapter->maps_lock);
1805 atomic_set(&adapter->nr_maps, 0);
1806 adapter->id = adapter_info.id;
1807 adapter->isc = adapter_info.isc;
1808 adapter->maskable = adapter_info.maskable;
1809 adapter->masked = false;
1810 adapter->swap = adapter_info.swap;
1811 dev->kvm->arch.adapters[adapter->id] = adapter;
1816 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1819 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1821 if (!adapter || !adapter->maskable)
1823 ret = adapter->masked;
1824 adapter->masked = masked;
1828 static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1830 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1831 struct s390_map_info *map;
1834 if (!adapter || !addr)
1837 map = kzalloc(sizeof(*map), GFP_KERNEL);
1842 INIT_LIST_HEAD(&map->list);
1843 map->guest_addr = addr;
1844 map->addr = gmap_translate(kvm->arch.gmap, addr);
1845 if (map->addr == -EFAULT) {
1849 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1853 down_write(&adapter->maps_lock);
1854 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1855 list_add_tail(&map->list, &adapter->maps);
1858 put_page(map->page);
1861 up_write(&adapter->maps_lock);
1868 static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1870 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1871 struct s390_map_info *map, *tmp;
1874 if (!adapter || !addr)
1877 down_write(&adapter->maps_lock);
1878 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1879 if (map->guest_addr == addr) {
1881 atomic_dec(&adapter->nr_maps);
1882 list_del(&map->list);
1883 put_page(map->page);
1888 up_write(&adapter->maps_lock);
1890 return found ? 0 : -EINVAL;
1893 void kvm_s390_destroy_adapters(struct kvm *kvm)
1896 struct s390_map_info *map, *tmp;
1898 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1899 if (!kvm->arch.adapters[i])
1901 list_for_each_entry_safe(map, tmp,
1902 &kvm->arch.adapters[i]->maps, list) {
1903 list_del(&map->list);
1904 put_page(map->page);
1907 kfree(kvm->arch.adapters[i]);
1911 static int modify_io_adapter(struct kvm_device *dev,
1912 struct kvm_device_attr *attr)
1914 struct kvm_s390_io_adapter_req req;
1915 struct s390_io_adapter *adapter;
1918 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1921 adapter = get_io_adapter(dev->kvm, req.id);
1925 case KVM_S390_IO_ADAPTER_MASK:
1926 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1930 case KVM_S390_IO_ADAPTER_MAP:
1931 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1933 case KVM_S390_IO_ADAPTER_UNMAP:
1934 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1943 static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1947 struct kvm_vcpu *vcpu;
1949 switch (attr->group) {
1950 case KVM_DEV_FLIC_ENQUEUE:
1951 r = enqueue_floating_irq(dev, attr);
1953 case KVM_DEV_FLIC_CLEAR_IRQS:
1954 kvm_s390_clear_float_irqs(dev->kvm);
1956 case KVM_DEV_FLIC_APF_ENABLE:
1957 dev->kvm->arch.gmap->pfault_enabled = 1;
1959 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1960 dev->kvm->arch.gmap->pfault_enabled = 0;
1962 * Make sure no async faults are in transition when
1963 * clearing the queues. So we don't need to worry
1964 * about late coming workers.
1966 synchronize_srcu(&dev->kvm->srcu);
1967 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1968 kvm_clear_async_pf_completion_queue(vcpu);
1970 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1971 r = register_io_adapter(dev, attr);
1973 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1974 r = modify_io_adapter(dev, attr);
1983 static int flic_create(struct kvm_device *dev, u32 type)
1987 if (dev->kvm->arch.flic)
1989 dev->kvm->arch.flic = dev;
1993 static void flic_destroy(struct kvm_device *dev)
1995 dev->kvm->arch.flic = NULL;
1999 /* s390 floating irq controller (flic) */
2000 struct kvm_device_ops kvm_flic_ops = {
2002 .get_attr = flic_get_attr,
2003 .set_attr = flic_set_attr,
2004 .create = flic_create,
2005 .destroy = flic_destroy,
2008 static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2012 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2014 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2017 static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2020 struct s390_map_info *map;
2025 list_for_each_entry(map, &adapter->maps, list) {
2026 if (map->guest_addr == addr)
2032 static int adapter_indicators_set(struct kvm *kvm,
2033 struct s390_io_adapter *adapter,
2034 struct kvm_s390_adapter_int *adapter_int)
2037 int summary_set, idx;
2038 struct s390_map_info *info;
2041 info = get_map_info(adapter, adapter_int->ind_addr);
2044 map = page_address(info->page);
2045 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2047 idx = srcu_read_lock(&kvm->srcu);
2048 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2049 set_page_dirty_lock(info->page);
2050 info = get_map_info(adapter, adapter_int->summary_addr);
2052 srcu_read_unlock(&kvm->srcu, idx);
2055 map = page_address(info->page);
2056 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2058 summary_set = test_and_set_bit(bit, map);
2059 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2060 set_page_dirty_lock(info->page);
2061 srcu_read_unlock(&kvm->srcu, idx);
2062 return summary_set ? 0 : 1;
2066 * < 0 - not injected due to error
2067 * = 0 - coalesced, summary indicator already active
2068 * > 0 - injected interrupt
2070 static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2071 struct kvm *kvm, int irq_source_id, int level,
2075 struct s390_io_adapter *adapter;
2077 /* We're only interested in the 0->1 transition. */
2080 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2083 down_read(&adapter->maps_lock);
2084 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2085 up_read(&adapter->maps_lock);
2086 if ((ret > 0) && !adapter->masked) {
2087 struct kvm_s390_interrupt s390int = {
2088 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2090 .parm64 = (adapter->isc << 27) | 0x80000000,
2092 ret = kvm_s390_inject_vm(kvm, &s390int);
2099 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
2100 const struct kvm_irq_routing_entry *ue)
2105 case KVM_IRQ_ROUTING_S390_ADAPTER:
2106 e->set = set_adapter_int;
2107 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2108 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2109 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2110 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2111 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2121 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2122 int irq_source_id, int level, bool line_status)
2127 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2129 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2130 struct kvm_s390_irq *buf;
2138 if (copy_from_user((void *) buf, irqstate, len)) {
2144 * Don't allow setting the interrupt state
2145 * when there are already interrupts pending
2147 spin_lock(&li->lock);
2148 if (li->pending_irqs) {
2153 for (n = 0; n < len / sizeof(*buf); n++) {
2154 r = do_inject_vcpu(vcpu, &buf[n]);
2160 spin_unlock(&li->lock);
2167 static void store_local_irq(struct kvm_s390_local_interrupt *li,
2168 struct kvm_s390_irq *irq,
2169 unsigned long irq_type)
2172 case IRQ_PEND_MCHK_EX:
2173 case IRQ_PEND_MCHK_REP:
2174 irq->type = KVM_S390_MCHK;
2175 irq->u.mchk = li->irq.mchk;
2178 irq->type = KVM_S390_PROGRAM_INT;
2179 irq->u.pgm = li->irq.pgm;
2181 case IRQ_PEND_PFAULT_INIT:
2182 irq->type = KVM_S390_INT_PFAULT_INIT;
2183 irq->u.ext = li->irq.ext;
2185 case IRQ_PEND_EXT_EXTERNAL:
2186 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2187 irq->u.extcall = li->irq.extcall;
2189 case IRQ_PEND_EXT_CLOCK_COMP:
2190 irq->type = KVM_S390_INT_CLOCK_COMP;
2192 case IRQ_PEND_EXT_CPU_TIMER:
2193 irq->type = KVM_S390_INT_CPU_TIMER;
2195 case IRQ_PEND_SIGP_STOP:
2196 irq->type = KVM_S390_SIGP_STOP;
2197 irq->u.stop = li->irq.stop;
2199 case IRQ_PEND_RESTART:
2200 irq->type = KVM_S390_RESTART;
2202 case IRQ_PEND_SET_PREFIX:
2203 irq->type = KVM_S390_SIGP_SET_PREFIX;
2204 irq->u.prefix = li->irq.prefix;
2209 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2211 uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
2212 unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
2213 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2214 unsigned long pending_irqs;
2215 struct kvm_s390_irq irq;
2216 unsigned long irq_type;
2220 spin_lock(&li->lock);
2221 pending_irqs = li->pending_irqs;
2222 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2223 sizeof(sigp_emerg_pending));
2224 spin_unlock(&li->lock);
2226 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2227 memset(&irq, 0, sizeof(irq));
2228 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2230 if (n + sizeof(irq) > len)
2232 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2233 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2238 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2239 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2240 memset(&irq, 0, sizeof(irq));
2241 if (n + sizeof(irq) > len)
2243 irq.type = KVM_S390_INT_EMERGENCY;
2244 irq.u.emerg.code = cpuaddr;
2245 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2251 if ((sigp_ctrl & SIGP_CTRL_C) &&
2252 (atomic_read(&vcpu->arch.sie_block->cpuflags) &
2253 CPUSTAT_ECALL_PEND)) {
2254 if (n + sizeof(irq) > len)
2256 memset(&irq, 0, sizeof(irq));
2257 irq.type = KVM_S390_INT_EXTERNAL_CALL;
2258 irq.u.extcall.code = sigp_ctrl & SIGP_CTRL_SCN_MASK;
2259 if (copy_to_user(&buf[n], &irq, sizeof(irq)))