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 PFAULT_INIT 0x0600
34 #define PFAULT_DONE 0x0680
35 #define VIRTIO_PARAM 0x0d00
37 int psw_extint_disabled(struct kvm_vcpu
*vcpu
)
39 return !(vcpu
->arch
.sie_block
->gpsw
.mask
& PSW_MASK_EXT
);
42 static int psw_ioint_disabled(struct kvm_vcpu
*vcpu
)
44 return !(vcpu
->arch
.sie_block
->gpsw
.mask
& PSW_MASK_IO
);
47 static int psw_mchk_disabled(struct kvm_vcpu
*vcpu
)
49 return !(vcpu
->arch
.sie_block
->gpsw
.mask
& PSW_MASK_MCHECK
);
52 static int psw_interrupts_disabled(struct kvm_vcpu
*vcpu
)
54 if ((vcpu
->arch
.sie_block
->gpsw
.mask
& PSW_MASK_PER
) ||
55 (vcpu
->arch
.sie_block
->gpsw
.mask
& PSW_MASK_IO
) ||
56 (vcpu
->arch
.sie_block
->gpsw
.mask
& PSW_MASK_EXT
))
61 static int ckc_interrupts_enabled(struct kvm_vcpu
*vcpu
)
63 if (psw_extint_disabled(vcpu
) ||
64 !(vcpu
->arch
.sie_block
->gcr
[0] & 0x800ul
))
66 if (guestdbg_enabled(vcpu
) && guestdbg_sstep_enabled(vcpu
))
67 /* No timer interrupts when single stepping */
72 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
)) {
81 return ckc_interrupts_enabled(vcpu
);
84 static int cpu_timer_interrupts_enabled(struct kvm_vcpu
*vcpu
)
86 return !psw_extint_disabled(vcpu
) &&
87 (vcpu
->arch
.sie_block
->gcr
[0] & 0x400ul
);
90 static int cpu_timer_irq_pending(struct kvm_vcpu
*vcpu
)
92 return (vcpu
->arch
.sie_block
->cputm
>> 63) &&
93 cpu_timer_interrupts_enabled(vcpu
);
96 static inline int is_ioirq(unsigned long irq_type
)
98 return ((irq_type
>= IRQ_PEND_IO_ISC_0
) &&
99 (irq_type
<= IRQ_PEND_IO_ISC_7
));
102 static uint64_t isc_to_isc_bits(int isc
)
104 return (0x80 >> isc
) << 24;
107 static inline u8
int_word_to_isc(u32 int_word
)
109 return (int_word
& 0x38000000) >> 27;
112 static inline unsigned long pending_floating_irqs(struct kvm_vcpu
*vcpu
)
114 return vcpu
->kvm
->arch
.float_int
.pending_irqs
;
117 static inline unsigned long pending_local_irqs(struct kvm_vcpu
*vcpu
)
119 return vcpu
->arch
.local_int
.pending_irqs
;
122 static unsigned long disable_iscs(struct kvm_vcpu
*vcpu
,
123 unsigned long active_mask
)
127 for (i
= 0; i
<= MAX_ISC
; i
++)
128 if (!(vcpu
->arch
.sie_block
->gcr
[6] & isc_to_isc_bits(i
)))
129 active_mask
&= ~(1UL << (IRQ_PEND_IO_ISC_0
+ i
));
134 static unsigned long deliverable_irqs(struct kvm_vcpu
*vcpu
)
136 unsigned long active_mask
;
138 active_mask
= pending_local_irqs(vcpu
);
139 active_mask
|= pending_floating_irqs(vcpu
);
143 if (psw_extint_disabled(vcpu
))
144 active_mask
&= ~IRQ_PEND_EXT_MASK
;
145 if (psw_ioint_disabled(vcpu
))
146 active_mask
&= ~IRQ_PEND_IO_MASK
;
148 active_mask
= disable_iscs(vcpu
, active_mask
);
149 if (!(vcpu
->arch
.sie_block
->gcr
[0] & 0x2000ul
))
150 __clear_bit(IRQ_PEND_EXT_EXTERNAL
, &active_mask
);
151 if (!(vcpu
->arch
.sie_block
->gcr
[0] & 0x4000ul
))
152 __clear_bit(IRQ_PEND_EXT_EMERGENCY
, &active_mask
);
153 if (!(vcpu
->arch
.sie_block
->gcr
[0] & 0x800ul
))
154 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP
, &active_mask
);
155 if (!(vcpu
->arch
.sie_block
->gcr
[0] & 0x400ul
))
156 __clear_bit(IRQ_PEND_EXT_CPU_TIMER
, &active_mask
);
157 if (!(vcpu
->arch
.sie_block
->gcr
[0] & 0x200ul
))
158 __clear_bit(IRQ_PEND_EXT_SERVICE
, &active_mask
);
159 if (psw_mchk_disabled(vcpu
))
160 active_mask
&= ~IRQ_PEND_MCHK_MASK
;
161 if (!(vcpu
->arch
.sie_block
->gcr
[14] &
162 vcpu
->kvm
->arch
.float_int
.mchk
.cr14
))
163 __clear_bit(IRQ_PEND_MCHK_REP
, &active_mask
);
166 * STOP irqs will never be actively delivered. They are triggered via
167 * intercept requests and cleared when the stop intercept is performed.
169 __clear_bit(IRQ_PEND_SIGP_STOP
, &active_mask
);
174 static void __set_cpu_idle(struct kvm_vcpu
*vcpu
)
176 atomic_or(CPUSTAT_WAIT
, &vcpu
->arch
.sie_block
->cpuflags
);
177 set_bit(vcpu
->vcpu_id
, vcpu
->arch
.local_int
.float_int
->idle_mask
);
180 static void __unset_cpu_idle(struct kvm_vcpu
*vcpu
)
182 atomic_andnot(CPUSTAT_WAIT
, &vcpu
->arch
.sie_block
->cpuflags
);
183 clear_bit(vcpu
->vcpu_id
, vcpu
->arch
.local_int
.float_int
->idle_mask
);
186 static void __reset_intercept_indicators(struct kvm_vcpu
*vcpu
)
188 atomic_andnot(CPUSTAT_IO_INT
| CPUSTAT_EXT_INT
| CPUSTAT_STOP_INT
,
189 &vcpu
->arch
.sie_block
->cpuflags
);
190 vcpu
->arch
.sie_block
->lctl
= 0x0000;
191 vcpu
->arch
.sie_block
->ictl
&= ~(ICTL_LPSW
| ICTL_STCTL
| ICTL_PINT
);
193 if (guestdbg_enabled(vcpu
)) {
194 vcpu
->arch
.sie_block
->lctl
|= (LCTL_CR0
| LCTL_CR9
|
195 LCTL_CR10
| LCTL_CR11
);
196 vcpu
->arch
.sie_block
->ictl
|= (ICTL_STCTL
| ICTL_PINT
);
200 static void __set_cpuflag(struct kvm_vcpu
*vcpu
, u32 flag
)
202 atomic_or(flag
, &vcpu
->arch
.sie_block
->cpuflags
);
205 static void set_intercept_indicators_io(struct kvm_vcpu
*vcpu
)
207 if (!(pending_floating_irqs(vcpu
) & IRQ_PEND_IO_MASK
))
209 else if (psw_ioint_disabled(vcpu
))
210 __set_cpuflag(vcpu
, CPUSTAT_IO_INT
);
212 vcpu
->arch
.sie_block
->lctl
|= LCTL_CR6
;
215 static void set_intercept_indicators_ext(struct kvm_vcpu
*vcpu
)
217 if (!(pending_local_irqs(vcpu
) & IRQ_PEND_EXT_MASK
))
219 if (psw_extint_disabled(vcpu
))
220 __set_cpuflag(vcpu
, CPUSTAT_EXT_INT
);
222 vcpu
->arch
.sie_block
->lctl
|= LCTL_CR0
;
225 static void set_intercept_indicators_mchk(struct kvm_vcpu
*vcpu
)
227 if (!(pending_local_irqs(vcpu
) & IRQ_PEND_MCHK_MASK
))
229 if (psw_mchk_disabled(vcpu
))
230 vcpu
->arch
.sie_block
->ictl
|= ICTL_LPSW
;
232 vcpu
->arch
.sie_block
->lctl
|= LCTL_CR14
;
235 static void set_intercept_indicators_stop(struct kvm_vcpu
*vcpu
)
237 if (kvm_s390_is_stop_irq_pending(vcpu
))
238 __set_cpuflag(vcpu
, CPUSTAT_STOP_INT
);
241 /* Set interception request for non-deliverable interrupts */
242 static void set_intercept_indicators(struct kvm_vcpu
*vcpu
)
244 set_intercept_indicators_io(vcpu
);
245 set_intercept_indicators_ext(vcpu
);
246 set_intercept_indicators_mchk(vcpu
);
247 set_intercept_indicators_stop(vcpu
);
250 static u16
get_ilc(struct kvm_vcpu
*vcpu
)
252 switch (vcpu
->arch
.sie_block
->icptcode
) {
258 /* last instruction only stored for these icptcodes */
259 return insn_length(vcpu
->arch
.sie_block
->ipa
>> 8);
261 return vcpu
->arch
.sie_block
->pgmilc
;
267 static int __must_check
__deliver_cpu_timer(struct kvm_vcpu
*vcpu
)
269 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
272 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_INT_CPU_TIMER
,
275 rc
= put_guest_lc(vcpu
, EXT_IRQ_CPU_TIMER
,
276 (u16
*)__LC_EXT_INT_CODE
);
277 rc
|= put_guest_lc(vcpu
, 0, (u16
*)__LC_EXT_CPU_ADDR
);
278 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
279 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
280 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
281 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
282 clear_bit(IRQ_PEND_EXT_CPU_TIMER
, &li
->pending_irqs
);
283 return rc
? -EFAULT
: 0;
286 static int __must_check
__deliver_ckc(struct kvm_vcpu
*vcpu
)
288 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
291 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_INT_CLOCK_COMP
,
294 rc
= put_guest_lc(vcpu
, EXT_IRQ_CLK_COMP
,
295 (u16 __user
*)__LC_EXT_INT_CODE
);
296 rc
|= put_guest_lc(vcpu
, 0, (u16
*)__LC_EXT_CPU_ADDR
);
297 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
298 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
299 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
300 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
301 clear_bit(IRQ_PEND_EXT_CLOCK_COMP
, &li
->pending_irqs
);
302 return rc
? -EFAULT
: 0;
305 static int __must_check
__deliver_pfault_init(struct kvm_vcpu
*vcpu
)
307 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
308 struct kvm_s390_ext_info ext
;
311 spin_lock(&li
->lock
);
313 clear_bit(IRQ_PEND_PFAULT_INIT
, &li
->pending_irqs
);
314 li
->irq
.ext
.ext_params2
= 0;
315 spin_unlock(&li
->lock
);
317 VCPU_EVENT(vcpu
, 4, "deliver: pfault init token 0x%llx",
319 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
320 KVM_S390_INT_PFAULT_INIT
,
323 rc
= put_guest_lc(vcpu
, EXT_IRQ_CP_SERVICE
, (u16
*) __LC_EXT_INT_CODE
);
324 rc
|= put_guest_lc(vcpu
, PFAULT_INIT
, (u16
*) __LC_EXT_CPU_ADDR
);
325 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
326 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
327 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
328 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
329 rc
|= put_guest_lc(vcpu
, ext
.ext_params2
, (u64
*) __LC_EXT_PARAMS2
);
330 return rc
? -EFAULT
: 0;
333 static int __must_check
__deliver_machine_check(struct kvm_vcpu
*vcpu
)
335 struct kvm_s390_float_interrupt
*fi
= &vcpu
->kvm
->arch
.float_int
;
336 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
337 struct kvm_s390_mchk_info mchk
= {};
338 unsigned long adtl_status_addr
;
342 spin_lock(&fi
->lock
);
343 spin_lock(&li
->lock
);
344 if (test_bit(IRQ_PEND_MCHK_EX
, &li
->pending_irqs
) ||
345 test_bit(IRQ_PEND_MCHK_REP
, &li
->pending_irqs
)) {
347 * If there was an exigent machine check pending, then any
348 * repressible machine checks that might have been pending
349 * are indicated along with it, so always clear bits for
350 * repressible and exigent interrupts
353 clear_bit(IRQ_PEND_MCHK_EX
, &li
->pending_irqs
);
354 clear_bit(IRQ_PEND_MCHK_REP
, &li
->pending_irqs
);
355 memset(&li
->irq
.mchk
, 0, sizeof(mchk
));
359 * We indicate floating repressible conditions along with
360 * other pending conditions. Channel Report Pending and Channel
361 * Subsystem damage are the only two and and are indicated by
362 * bits in mcic and masked in cr14.
364 if (test_and_clear_bit(IRQ_PEND_MCHK_REP
, &fi
->pending_irqs
)) {
365 mchk
.mcic
|= fi
->mchk
.mcic
;
366 mchk
.cr14
|= fi
->mchk
.cr14
;
367 memset(&fi
->mchk
, 0, sizeof(mchk
));
370 spin_unlock(&li
->lock
);
371 spin_unlock(&fi
->lock
);
374 VCPU_EVENT(vcpu
, 3, "deliver: machine check mcic 0x%llx",
376 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
378 mchk
.cr14
, mchk
.mcic
);
380 rc
= kvm_s390_vcpu_store_status(vcpu
,
381 KVM_S390_STORE_STATUS_PREFIXED
);
382 rc
|= read_guest_lc(vcpu
, __LC_VX_SAVE_AREA_ADDR
,
384 sizeof(unsigned long));
385 rc
|= kvm_s390_vcpu_store_adtl_status(vcpu
,
387 rc
|= put_guest_lc(vcpu
, mchk
.mcic
,
388 (u64 __user
*) __LC_MCCK_CODE
);
389 rc
|= put_guest_lc(vcpu
, mchk
.failing_storage_address
,
390 (u64 __user
*) __LC_MCCK_FAIL_STOR_ADDR
);
391 rc
|= write_guest_lc(vcpu
, __LC_PSW_SAVE_AREA
,
393 sizeof(mchk
.fixed_logout
));
394 rc
|= write_guest_lc(vcpu
, __LC_MCK_OLD_PSW
,
395 &vcpu
->arch
.sie_block
->gpsw
,
397 rc
|= read_guest_lc(vcpu
, __LC_MCK_NEW_PSW
,
398 &vcpu
->arch
.sie_block
->gpsw
,
401 return rc
? -EFAULT
: 0;
404 static int __must_check
__deliver_restart(struct kvm_vcpu
*vcpu
)
406 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
409 VCPU_EVENT(vcpu
, 3, "%s", "deliver: cpu restart");
410 vcpu
->stat
.deliver_restart_signal
++;
411 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_RESTART
, 0, 0);
413 rc
= write_guest_lc(vcpu
,
414 offsetof(struct _lowcore
, restart_old_psw
),
415 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
416 rc
|= read_guest_lc(vcpu
, offsetof(struct _lowcore
, restart_psw
),
417 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
418 clear_bit(IRQ_PEND_RESTART
, &li
->pending_irqs
);
419 return rc
? -EFAULT
: 0;
422 static int __must_check
__deliver_set_prefix(struct kvm_vcpu
*vcpu
)
424 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
425 struct kvm_s390_prefix_info prefix
;
427 spin_lock(&li
->lock
);
428 prefix
= li
->irq
.prefix
;
429 li
->irq
.prefix
.address
= 0;
430 clear_bit(IRQ_PEND_SET_PREFIX
, &li
->pending_irqs
);
431 spin_unlock(&li
->lock
);
433 vcpu
->stat
.deliver_prefix_signal
++;
434 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
435 KVM_S390_SIGP_SET_PREFIX
,
438 kvm_s390_set_prefix(vcpu
, prefix
.address
);
442 static int __must_check
__deliver_emergency_signal(struct kvm_vcpu
*vcpu
)
444 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
448 spin_lock(&li
->lock
);
449 cpu_addr
= find_first_bit(li
->sigp_emerg_pending
, KVM_MAX_VCPUS
);
450 clear_bit(cpu_addr
, li
->sigp_emerg_pending
);
451 if (bitmap_empty(li
->sigp_emerg_pending
, KVM_MAX_VCPUS
))
452 clear_bit(IRQ_PEND_EXT_EMERGENCY
, &li
->pending_irqs
);
453 spin_unlock(&li
->lock
);
455 VCPU_EVENT(vcpu
, 4, "%s", "deliver: sigp emerg");
456 vcpu
->stat
.deliver_emergency_signal
++;
457 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_INT_EMERGENCY
,
460 rc
= put_guest_lc(vcpu
, EXT_IRQ_EMERGENCY_SIG
,
461 (u16
*)__LC_EXT_INT_CODE
);
462 rc
|= put_guest_lc(vcpu
, cpu_addr
, (u16
*)__LC_EXT_CPU_ADDR
);
463 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
464 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
465 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
466 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
467 return rc
? -EFAULT
: 0;
470 static int __must_check
__deliver_external_call(struct kvm_vcpu
*vcpu
)
472 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
473 struct kvm_s390_extcall_info extcall
;
476 spin_lock(&li
->lock
);
477 extcall
= li
->irq
.extcall
;
478 li
->irq
.extcall
.code
= 0;
479 clear_bit(IRQ_PEND_EXT_EXTERNAL
, &li
->pending_irqs
);
480 spin_unlock(&li
->lock
);
482 VCPU_EVENT(vcpu
, 4, "%s", "deliver: sigp ext call");
483 vcpu
->stat
.deliver_external_call
++;
484 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
485 KVM_S390_INT_EXTERNAL_CALL
,
488 rc
= put_guest_lc(vcpu
, EXT_IRQ_EXTERNAL_CALL
,
489 (u16
*)__LC_EXT_INT_CODE
);
490 rc
|= put_guest_lc(vcpu
, extcall
.code
, (u16
*)__LC_EXT_CPU_ADDR
);
491 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
492 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
493 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
, &vcpu
->arch
.sie_block
->gpsw
,
495 return rc
? -EFAULT
: 0;
498 static int __must_check
__deliver_prog(struct kvm_vcpu
*vcpu
)
500 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
501 struct kvm_s390_pgm_info pgm_info
;
502 int rc
= 0, nullifying
= false;
503 u16 ilc
= get_ilc(vcpu
);
505 spin_lock(&li
->lock
);
506 pgm_info
= li
->irq
.pgm
;
507 clear_bit(IRQ_PEND_PROG
, &li
->pending_irqs
);
508 memset(&li
->irq
.pgm
, 0, sizeof(pgm_info
));
509 spin_unlock(&li
->lock
);
511 VCPU_EVENT(vcpu
, 3, "deliver: program irq code 0x%x, ilc:%d",
513 vcpu
->stat
.deliver_program_int
++;
514 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_PROGRAM_INT
,
517 switch (pgm_info
.code
& ~PGM_PER
) {
518 case PGM_AFX_TRANSLATION
:
519 case PGM_ASX_TRANSLATION
:
520 case PGM_EX_TRANSLATION
:
521 case PGM_LFX_TRANSLATION
:
522 case PGM_LSTE_SEQUENCE
:
523 case PGM_LSX_TRANSLATION
:
524 case PGM_LX_TRANSLATION
:
525 case PGM_PRIMARY_AUTHORITY
:
526 case PGM_SECONDARY_AUTHORITY
:
529 case PGM_SPACE_SWITCH
:
530 rc
= put_guest_lc(vcpu
, pgm_info
.trans_exc_code
,
531 (u64
*)__LC_TRANS_EXC_CODE
);
533 case PGM_ALEN_TRANSLATION
:
534 case PGM_ALE_SEQUENCE
:
535 case PGM_ASTE_INSTANCE
:
536 case PGM_ASTE_SEQUENCE
:
537 case PGM_ASTE_VALIDITY
:
538 case PGM_EXTENDED_AUTHORITY
:
539 rc
= put_guest_lc(vcpu
, pgm_info
.exc_access_id
,
540 (u8
*)__LC_EXC_ACCESS_ID
);
544 case PGM_PAGE_TRANSLATION
:
545 case PGM_REGION_FIRST_TRANS
:
546 case PGM_REGION_SECOND_TRANS
:
547 case PGM_REGION_THIRD_TRANS
:
548 case PGM_SEGMENT_TRANSLATION
:
549 rc
= put_guest_lc(vcpu
, pgm_info
.trans_exc_code
,
550 (u64
*)__LC_TRANS_EXC_CODE
);
551 rc
|= put_guest_lc(vcpu
, pgm_info
.exc_access_id
,
552 (u8
*)__LC_EXC_ACCESS_ID
);
553 rc
|= put_guest_lc(vcpu
, pgm_info
.op_access_id
,
554 (u8
*)__LC_OP_ACCESS_ID
);
558 rc
= put_guest_lc(vcpu
, pgm_info
.mon_class_nr
,
559 (u16
*)__LC_MON_CLASS_NR
);
560 rc
|= put_guest_lc(vcpu
, pgm_info
.mon_code
,
561 (u64
*)__LC_MON_CODE
);
563 case PGM_VECTOR_PROCESSING
:
565 rc
= put_guest_lc(vcpu
, pgm_info
.data_exc_code
,
566 (u32
*)__LC_DATA_EXC_CODE
);
569 rc
= put_guest_lc(vcpu
, pgm_info
.trans_exc_code
,
570 (u64
*)__LC_TRANS_EXC_CODE
);
571 rc
|= put_guest_lc(vcpu
, pgm_info
.exc_access_id
,
572 (u8
*)__LC_EXC_ACCESS_ID
);
575 case PGM_STACK_EMPTY
:
576 case PGM_STACK_SPECIFICATION
:
578 case PGM_STACK_OPERATION
:
579 case PGM_TRACE_TABEL
:
580 case PGM_CRYPTO_OPERATION
:
585 if (pgm_info
.code
& PGM_PER
) {
586 rc
|= put_guest_lc(vcpu
, pgm_info
.per_code
,
587 (u8
*) __LC_PER_CODE
);
588 rc
|= put_guest_lc(vcpu
, pgm_info
.per_atmid
,
589 (u8
*)__LC_PER_ATMID
);
590 rc
|= put_guest_lc(vcpu
, pgm_info
.per_address
,
591 (u64
*) __LC_PER_ADDRESS
);
592 rc
|= put_guest_lc(vcpu
, pgm_info
.per_access_id
,
593 (u8
*) __LC_PER_ACCESS_ID
);
596 if (nullifying
&& vcpu
->arch
.sie_block
->icptcode
== ICPT_INST
)
597 kvm_s390_rewind_psw(vcpu
, ilc
);
599 rc
|= put_guest_lc(vcpu
, ilc
, (u16
*) __LC_PGM_ILC
);
600 rc
|= put_guest_lc(vcpu
, vcpu
->arch
.sie_block
->gbea
,
601 (u64
*) __LC_LAST_BREAK
);
602 rc
|= put_guest_lc(vcpu
, pgm_info
.code
,
603 (u16
*)__LC_PGM_INT_CODE
);
604 rc
|= write_guest_lc(vcpu
, __LC_PGM_OLD_PSW
,
605 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
606 rc
|= read_guest_lc(vcpu
, __LC_PGM_NEW_PSW
,
607 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
608 return rc
? -EFAULT
: 0;
611 static int __must_check
__deliver_service(struct kvm_vcpu
*vcpu
)
613 struct kvm_s390_float_interrupt
*fi
= &vcpu
->kvm
->arch
.float_int
;
614 struct kvm_s390_ext_info ext
;
617 spin_lock(&fi
->lock
);
618 if (!(test_bit(IRQ_PEND_EXT_SERVICE
, &fi
->pending_irqs
))) {
619 spin_unlock(&fi
->lock
);
622 ext
= fi
->srv_signal
;
623 memset(&fi
->srv_signal
, 0, sizeof(ext
));
624 clear_bit(IRQ_PEND_EXT_SERVICE
, &fi
->pending_irqs
);
625 spin_unlock(&fi
->lock
);
627 VCPU_EVENT(vcpu
, 4, "deliver: sclp parameter 0x%x",
629 vcpu
->stat
.deliver_service_signal
++;
630 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_INT_SERVICE
,
633 rc
= put_guest_lc(vcpu
, EXT_IRQ_SERVICE_SIG
, (u16
*)__LC_EXT_INT_CODE
);
634 rc
|= put_guest_lc(vcpu
, 0, (u16
*)__LC_EXT_CPU_ADDR
);
635 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
636 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
637 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
638 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
639 rc
|= put_guest_lc(vcpu
, ext
.ext_params
,
640 (u32
*)__LC_EXT_PARAMS
);
642 return rc
? -EFAULT
: 0;
645 static int __must_check
__deliver_pfault_done(struct kvm_vcpu
*vcpu
)
647 struct kvm_s390_float_interrupt
*fi
= &vcpu
->kvm
->arch
.float_int
;
648 struct kvm_s390_interrupt_info
*inti
;
651 spin_lock(&fi
->lock
);
652 inti
= list_first_entry_or_null(&fi
->lists
[FIRQ_LIST_PFAULT
],
653 struct kvm_s390_interrupt_info
,
656 list_del(&inti
->list
);
657 fi
->counters
[FIRQ_CNTR_PFAULT
] -= 1;
659 if (list_empty(&fi
->lists
[FIRQ_LIST_PFAULT
]))
660 clear_bit(IRQ_PEND_PFAULT_DONE
, &fi
->pending_irqs
);
661 spin_unlock(&fi
->lock
);
664 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
665 KVM_S390_INT_PFAULT_DONE
, 0,
666 inti
->ext
.ext_params2
);
667 VCPU_EVENT(vcpu
, 4, "deliver: pfault done token 0x%llx",
668 inti
->ext
.ext_params2
);
670 rc
= put_guest_lc(vcpu
, EXT_IRQ_CP_SERVICE
,
671 (u16
*)__LC_EXT_INT_CODE
);
672 rc
|= put_guest_lc(vcpu
, PFAULT_DONE
,
673 (u16
*)__LC_EXT_CPU_ADDR
);
674 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
675 &vcpu
->arch
.sie_block
->gpsw
,
677 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
678 &vcpu
->arch
.sie_block
->gpsw
,
680 rc
|= put_guest_lc(vcpu
, inti
->ext
.ext_params2
,
681 (u64
*)__LC_EXT_PARAMS2
);
684 return rc
? -EFAULT
: 0;
687 static int __must_check
__deliver_virtio(struct kvm_vcpu
*vcpu
)
689 struct kvm_s390_float_interrupt
*fi
= &vcpu
->kvm
->arch
.float_int
;
690 struct kvm_s390_interrupt_info
*inti
;
693 spin_lock(&fi
->lock
);
694 inti
= list_first_entry_or_null(&fi
->lists
[FIRQ_LIST_VIRTIO
],
695 struct kvm_s390_interrupt_info
,
699 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
700 inti
->ext
.ext_params
, inti
->ext
.ext_params2
);
701 vcpu
->stat
.deliver_virtio_interrupt
++;
702 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
704 inti
->ext
.ext_params
,
705 inti
->ext
.ext_params2
);
706 list_del(&inti
->list
);
707 fi
->counters
[FIRQ_CNTR_VIRTIO
] -= 1;
709 if (list_empty(&fi
->lists
[FIRQ_LIST_VIRTIO
]))
710 clear_bit(IRQ_PEND_VIRTIO
, &fi
->pending_irqs
);
711 spin_unlock(&fi
->lock
);
714 rc
= put_guest_lc(vcpu
, EXT_IRQ_CP_SERVICE
,
715 (u16
*)__LC_EXT_INT_CODE
);
716 rc
|= put_guest_lc(vcpu
, VIRTIO_PARAM
,
717 (u16
*)__LC_EXT_CPU_ADDR
);
718 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
719 &vcpu
->arch
.sie_block
->gpsw
,
721 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
722 &vcpu
->arch
.sie_block
->gpsw
,
724 rc
|= put_guest_lc(vcpu
, inti
->ext
.ext_params
,
725 (u32
*)__LC_EXT_PARAMS
);
726 rc
|= put_guest_lc(vcpu
, inti
->ext
.ext_params2
,
727 (u64
*)__LC_EXT_PARAMS2
);
730 return rc
? -EFAULT
: 0;
733 static int __must_check
__deliver_io(struct kvm_vcpu
*vcpu
,
734 unsigned long irq_type
)
736 struct list_head
*isc_list
;
737 struct kvm_s390_float_interrupt
*fi
;
738 struct kvm_s390_interrupt_info
*inti
= NULL
;
741 fi
= &vcpu
->kvm
->arch
.float_int
;
743 spin_lock(&fi
->lock
);
744 isc_list
= &fi
->lists
[irq_type
- IRQ_PEND_IO_ISC_0
];
745 inti
= list_first_entry_or_null(isc_list
,
746 struct kvm_s390_interrupt_info
,
749 VCPU_EVENT(vcpu
, 4, "deliver: I/O 0x%llx", inti
->type
);
750 vcpu
->stat
.deliver_io_int
++;
751 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
753 ((__u32
)inti
->io
.subchannel_id
<< 16) |
754 inti
->io
.subchannel_nr
,
755 ((__u64
)inti
->io
.io_int_parm
<< 32) |
756 inti
->io
.io_int_word
);
757 list_del(&inti
->list
);
758 fi
->counters
[FIRQ_CNTR_IO
] -= 1;
760 if (list_empty(isc_list
))
761 clear_bit(irq_type
, &fi
->pending_irqs
);
762 spin_unlock(&fi
->lock
);
765 rc
= put_guest_lc(vcpu
, inti
->io
.subchannel_id
,
766 (u16
*)__LC_SUBCHANNEL_ID
);
767 rc
|= put_guest_lc(vcpu
, inti
->io
.subchannel_nr
,
768 (u16
*)__LC_SUBCHANNEL_NR
);
769 rc
|= put_guest_lc(vcpu
, inti
->io
.io_int_parm
,
770 (u32
*)__LC_IO_INT_PARM
);
771 rc
|= put_guest_lc(vcpu
, inti
->io
.io_int_word
,
772 (u32
*)__LC_IO_INT_WORD
);
773 rc
|= write_guest_lc(vcpu
, __LC_IO_OLD_PSW
,
774 &vcpu
->arch
.sie_block
->gpsw
,
776 rc
|= read_guest_lc(vcpu
, __LC_IO_NEW_PSW
,
777 &vcpu
->arch
.sie_block
->gpsw
,
782 return rc
? -EFAULT
: 0;
785 typedef int (*deliver_irq_t
)(struct kvm_vcpu
*vcpu
);
787 static const deliver_irq_t deliver_irq_funcs
[] = {
788 [IRQ_PEND_MCHK_EX
] = __deliver_machine_check
,
789 [IRQ_PEND_MCHK_REP
] = __deliver_machine_check
,
790 [IRQ_PEND_PROG
] = __deliver_prog
,
791 [IRQ_PEND_EXT_EMERGENCY
] = __deliver_emergency_signal
,
792 [IRQ_PEND_EXT_EXTERNAL
] = __deliver_external_call
,
793 [IRQ_PEND_EXT_CLOCK_COMP
] = __deliver_ckc
,
794 [IRQ_PEND_EXT_CPU_TIMER
] = __deliver_cpu_timer
,
795 [IRQ_PEND_RESTART
] = __deliver_restart
,
796 [IRQ_PEND_SET_PREFIX
] = __deliver_set_prefix
,
797 [IRQ_PEND_PFAULT_INIT
] = __deliver_pfault_init
,
798 [IRQ_PEND_EXT_SERVICE
] = __deliver_service
,
799 [IRQ_PEND_PFAULT_DONE
] = __deliver_pfault_done
,
800 [IRQ_PEND_VIRTIO
] = __deliver_virtio
,
803 /* Check whether an external call is pending (deliverable or not) */
804 int kvm_s390_ext_call_pending(struct kvm_vcpu
*vcpu
)
806 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
807 uint8_t sigp_ctrl
= vcpu
->kvm
->arch
.sca
->cpu
[vcpu
->vcpu_id
].sigp_ctrl
;
809 if (!sclp
.has_sigpif
)
810 return test_bit(IRQ_PEND_EXT_EXTERNAL
, &li
->pending_irqs
);
812 return (sigp_ctrl
& SIGP_CTRL_C
) &&
813 (atomic_read(&vcpu
->arch
.sie_block
->cpuflags
) & CPUSTAT_ECALL_PEND
);
816 int kvm_s390_vcpu_has_irq(struct kvm_vcpu
*vcpu
, int exclude_stop
)
820 rc
= !!deliverable_irqs(vcpu
);
822 if (!rc
&& kvm_cpu_has_pending_timer(vcpu
))
825 /* external call pending and deliverable */
826 if (!rc
&& kvm_s390_ext_call_pending(vcpu
) &&
827 !psw_extint_disabled(vcpu
) &&
828 (vcpu
->arch
.sie_block
->gcr
[0] & 0x2000ul
))
831 if (!rc
&& !exclude_stop
&& kvm_s390_is_stop_irq_pending(vcpu
))
837 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
)
839 return ckc_irq_pending(vcpu
) || cpu_timer_irq_pending(vcpu
);
842 int kvm_s390_handle_wait(struct kvm_vcpu
*vcpu
)
846 vcpu
->stat
.exit_wait_state
++;
849 if (kvm_cpu_has_pending_timer(vcpu
) || kvm_arch_vcpu_runnable(vcpu
))
852 if (psw_interrupts_disabled(vcpu
)) {
853 VCPU_EVENT(vcpu
, 3, "%s", "disabled wait");
854 return -EOPNOTSUPP
; /* disabled wait */
857 if (!ckc_interrupts_enabled(vcpu
)) {
858 VCPU_EVENT(vcpu
, 3, "%s", "enabled wait w/o timer");
859 __set_cpu_idle(vcpu
);
864 now
= get_tod_clock_fast() + vcpu
->arch
.sie_block
->epoch
;
866 sltime
= tod_to_ns(vcpu
->arch
.sie_block
->ckc
- now
);
869 if (vcpu
->arch
.sie_block
->ckc
< now
)
872 __set_cpu_idle(vcpu
);
873 hrtimer_start(&vcpu
->arch
.ckc_timer
, ktime_set (0, sltime
) , HRTIMER_MODE_REL
);
874 VCPU_EVENT(vcpu
, 4, "enabled wait via clock comparator: %llu ns", sltime
);
876 srcu_read_unlock(&vcpu
->kvm
->srcu
, vcpu
->srcu_idx
);
877 kvm_vcpu_block(vcpu
);
878 __unset_cpu_idle(vcpu
);
879 vcpu
->srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
881 hrtimer_cancel(&vcpu
->arch
.ckc_timer
);
885 void kvm_s390_vcpu_wakeup(struct kvm_vcpu
*vcpu
)
887 if (waitqueue_active(&vcpu
->wq
)) {
889 * The vcpu gave up the cpu voluntarily, mark it as a good
892 vcpu
->preempted
= true;
893 wake_up_interruptible(&vcpu
->wq
);
894 vcpu
->stat
.halt_wakeup
++;
898 enum hrtimer_restart
kvm_s390_idle_wakeup(struct hrtimer
*timer
)
900 struct kvm_vcpu
*vcpu
;
903 vcpu
= container_of(timer
, struct kvm_vcpu
, arch
.ckc_timer
);
905 now
= get_tod_clock_fast() + vcpu
->arch
.sie_block
->epoch
;
907 sltime
= tod_to_ns(vcpu
->arch
.sie_block
->ckc
- now
);
910 * If the monotonic clock runs faster than the tod clock we might be
911 * woken up too early and have to go back to sleep to avoid deadlocks.
913 if (vcpu
->arch
.sie_block
->ckc
> now
&&
914 hrtimer_forward_now(timer
, ns_to_ktime(sltime
)))
915 return HRTIMER_RESTART
;
916 kvm_s390_vcpu_wakeup(vcpu
);
917 return HRTIMER_NORESTART
;
920 void kvm_s390_clear_local_irqs(struct kvm_vcpu
*vcpu
)
922 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
924 spin_lock(&li
->lock
);
925 li
->pending_irqs
= 0;
926 bitmap_zero(li
->sigp_emerg_pending
, KVM_MAX_VCPUS
);
927 memset(&li
->irq
, 0, sizeof(li
->irq
));
928 spin_unlock(&li
->lock
);
930 /* clear pending external calls set by sigp interpretation facility */
931 atomic_andnot(CPUSTAT_ECALL_PEND
, li
->cpuflags
);
932 vcpu
->kvm
->arch
.sca
->cpu
[vcpu
->vcpu_id
].sigp_ctrl
= 0;
935 int __must_check
kvm_s390_deliver_pending_interrupts(struct kvm_vcpu
*vcpu
)
937 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
940 unsigned long irq_type
;
943 __reset_intercept_indicators(vcpu
);
945 /* pending ckc conditions might have been invalidated */
946 clear_bit(IRQ_PEND_EXT_CLOCK_COMP
, &li
->pending_irqs
);
947 if (ckc_irq_pending(vcpu
))
948 set_bit(IRQ_PEND_EXT_CLOCK_COMP
, &li
->pending_irqs
);
950 /* pending cpu timer conditions might have been invalidated */
951 clear_bit(IRQ_PEND_EXT_CPU_TIMER
, &li
->pending_irqs
);
952 if (cpu_timer_irq_pending(vcpu
))
953 set_bit(IRQ_PEND_EXT_CPU_TIMER
, &li
->pending_irqs
);
955 while ((irqs
= deliverable_irqs(vcpu
)) && !rc
) {
956 /* bits are in the order of interrupt priority */
957 irq_type
= find_first_bit(&irqs
, IRQ_PEND_COUNT
);
958 if (is_ioirq(irq_type
)) {
959 rc
= __deliver_io(vcpu
, irq_type
);
961 func
= deliver_irq_funcs
[irq_type
];
963 WARN_ON_ONCE(func
== NULL
);
964 clear_bit(irq_type
, &li
->pending_irqs
);
971 set_intercept_indicators(vcpu
);
976 static int __inject_prog(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
978 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
980 VCPU_EVENT(vcpu
, 3, "inject: program irq code 0x%x", irq
->u
.pgm
.code
);
981 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_PROGRAM_INT
,
984 li
->irq
.pgm
= irq
->u
.pgm
;
985 set_bit(IRQ_PEND_PROG
, &li
->pending_irqs
);
989 int kvm_s390_inject_program_int(struct kvm_vcpu
*vcpu
, u16 code
)
991 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
992 struct kvm_s390_irq irq
;
994 spin_lock(&li
->lock
);
995 irq
.u
.pgm
.code
= code
;
996 __inject_prog(vcpu
, &irq
);
997 BUG_ON(waitqueue_active(li
->wq
));
998 spin_unlock(&li
->lock
);
1002 int kvm_s390_inject_prog_irq(struct kvm_vcpu
*vcpu
,
1003 struct kvm_s390_pgm_info
*pgm_info
)
1005 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1006 struct kvm_s390_irq irq
;
1009 spin_lock(&li
->lock
);
1010 irq
.u
.pgm
= *pgm_info
;
1011 rc
= __inject_prog(vcpu
, &irq
);
1012 BUG_ON(waitqueue_active(li
->wq
));
1013 spin_unlock(&li
->lock
);
1017 static int __inject_pfault_init(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1019 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1021 VCPU_EVENT(vcpu
, 4, "inject: pfault init parameter block at 0x%llx",
1022 irq
->u
.ext
.ext_params2
);
1023 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_PFAULT_INIT
,
1024 irq
->u
.ext
.ext_params
,
1025 irq
->u
.ext
.ext_params2
);
1027 li
->irq
.ext
= irq
->u
.ext
;
1028 set_bit(IRQ_PEND_PFAULT_INIT
, &li
->pending_irqs
);
1029 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1033 static int __inject_extcall_sigpif(struct kvm_vcpu
*vcpu
, uint16_t src_id
)
1035 unsigned char new_val
, old_val
;
1036 uint8_t *sigp_ctrl
= &vcpu
->kvm
->arch
.sca
->cpu
[vcpu
->vcpu_id
].sigp_ctrl
;
1038 new_val
= SIGP_CTRL_C
| (src_id
& SIGP_CTRL_SCN_MASK
);
1039 old_val
= *sigp_ctrl
& ~SIGP_CTRL_C
;
1040 if (cmpxchg(sigp_ctrl
, old_val
, new_val
) != old_val
) {
1041 /* another external call is pending */
1044 atomic_or(CPUSTAT_ECALL_PEND
, &vcpu
->arch
.sie_block
->cpuflags
);
1048 static int __inject_extcall(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1050 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1051 struct kvm_s390_extcall_info
*extcall
= &li
->irq
.extcall
;
1052 uint16_t src_id
= irq
->u
.extcall
.code
;
1054 VCPU_EVENT(vcpu
, 4, "inject: external call source-cpu:%u",
1056 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_EXTERNAL_CALL
,
1059 /* sending vcpu invalid */
1060 if (src_id
>= KVM_MAX_VCPUS
||
1061 kvm_get_vcpu(vcpu
->kvm
, src_id
) == NULL
)
1064 if (sclp
.has_sigpif
)
1065 return __inject_extcall_sigpif(vcpu
, src_id
);
1067 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL
, &li
->pending_irqs
))
1069 *extcall
= irq
->u
.extcall
;
1070 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1074 static int __inject_set_prefix(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1076 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1077 struct kvm_s390_prefix_info
*prefix
= &li
->irq
.prefix
;
1079 VCPU_EVENT(vcpu
, 3, "inject: set prefix to %x",
1080 irq
->u
.prefix
.address
);
1081 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_SIGP_SET_PREFIX
,
1082 irq
->u
.prefix
.address
, 0);
1084 if (!is_vcpu_stopped(vcpu
))
1087 *prefix
= irq
->u
.prefix
;
1088 set_bit(IRQ_PEND_SET_PREFIX
, &li
->pending_irqs
);
1092 #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
1093 static int __inject_sigp_stop(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1095 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1096 struct kvm_s390_stop_info
*stop
= &li
->irq
.stop
;
1099 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_SIGP_STOP
, 0, 0);
1101 if (irq
->u
.stop
.flags
& ~KVM_S390_STOP_SUPP_FLAGS
)
1104 if (is_vcpu_stopped(vcpu
)) {
1105 if (irq
->u
.stop
.flags
& KVM_S390_STOP_FLAG_STORE_STATUS
)
1106 rc
= kvm_s390_store_status_unloaded(vcpu
,
1107 KVM_S390_STORE_STATUS_NOADDR
);
1111 if (test_and_set_bit(IRQ_PEND_SIGP_STOP
, &li
->pending_irqs
))
1113 stop
->flags
= irq
->u
.stop
.flags
;
1114 __set_cpuflag(vcpu
, CPUSTAT_STOP_INT
);
1118 static int __inject_sigp_restart(struct kvm_vcpu
*vcpu
,
1119 struct kvm_s390_irq
*irq
)
1121 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1123 VCPU_EVENT(vcpu
, 3, "%s", "inject: restart int");
1124 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_RESTART
, 0, 0);
1126 set_bit(IRQ_PEND_RESTART
, &li
->pending_irqs
);
1130 static int __inject_sigp_emergency(struct kvm_vcpu
*vcpu
,
1131 struct kvm_s390_irq
*irq
)
1133 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1135 VCPU_EVENT(vcpu
, 4, "inject: emergency from cpu %u",
1137 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_EMERGENCY
,
1138 irq
->u
.emerg
.code
, 0);
1140 set_bit(irq
->u
.emerg
.code
, li
->sigp_emerg_pending
);
1141 set_bit(IRQ_PEND_EXT_EMERGENCY
, &li
->pending_irqs
);
1142 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1146 static int __inject_mchk(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1148 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1149 struct kvm_s390_mchk_info
*mchk
= &li
->irq
.mchk
;
1151 VCPU_EVENT(vcpu
, 3, "inject: machine check mcic 0x%llx",
1153 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_MCHK
, 0,
1157 * Because repressible machine checks can be indicated along with
1158 * exigent machine checks (PoP, Chapter 11, Interruption action)
1159 * we need to combine cr14, mcic and external damage code.
1160 * Failing storage address and the logout area should not be or'ed
1161 * together, we just indicate the last occurrence of the corresponding
1164 mchk
->cr14
|= irq
->u
.mchk
.cr14
;
1165 mchk
->mcic
|= irq
->u
.mchk
.mcic
;
1166 mchk
->ext_damage_code
|= irq
->u
.mchk
.ext_damage_code
;
1167 mchk
->failing_storage_address
= irq
->u
.mchk
.failing_storage_address
;
1168 memcpy(&mchk
->fixed_logout
, &irq
->u
.mchk
.fixed_logout
,
1169 sizeof(mchk
->fixed_logout
));
1170 if (mchk
->mcic
& MCHK_EX_MASK
)
1171 set_bit(IRQ_PEND_MCHK_EX
, &li
->pending_irqs
);
1172 else if (mchk
->mcic
& MCHK_REP_MASK
)
1173 set_bit(IRQ_PEND_MCHK_REP
, &li
->pending_irqs
);
1177 static int __inject_ckc(struct kvm_vcpu
*vcpu
)
1179 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1181 VCPU_EVENT(vcpu
, 3, "%s", "inject: clock comparator external");
1182 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_CLOCK_COMP
,
1185 set_bit(IRQ_PEND_EXT_CLOCK_COMP
, &li
->pending_irqs
);
1186 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1190 static int __inject_cpu_timer(struct kvm_vcpu
*vcpu
)
1192 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1194 VCPU_EVENT(vcpu
, 3, "%s", "inject: cpu timer external");
1195 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_CPU_TIMER
,
1198 set_bit(IRQ_PEND_EXT_CPU_TIMER
, &li
->pending_irqs
);
1199 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1203 static struct kvm_s390_interrupt_info
*get_io_int(struct kvm
*kvm
,
1206 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1207 struct list_head
*isc_list
= &fi
->lists
[FIRQ_LIST_IO_ISC_0
+ isc
];
1208 struct kvm_s390_interrupt_info
*iter
;
1209 u16 id
= (schid
& 0xffff0000U
) >> 16;
1210 u16 nr
= schid
& 0x0000ffffU
;
1212 spin_lock(&fi
->lock
);
1213 list_for_each_entry(iter
, isc_list
, list
) {
1214 if (schid
&& (id
!= iter
->io
.subchannel_id
||
1215 nr
!= iter
->io
.subchannel_nr
))
1217 /* found an appropriate entry */
1218 list_del_init(&iter
->list
);
1219 fi
->counters
[FIRQ_CNTR_IO
] -= 1;
1220 if (list_empty(isc_list
))
1221 clear_bit(IRQ_PEND_IO_ISC_0
+ isc
, &fi
->pending_irqs
);
1222 spin_unlock(&fi
->lock
);
1225 spin_unlock(&fi
->lock
);
1230 * Dequeue and return an I/O interrupt matching any of the interruption
1231 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
1233 struct kvm_s390_interrupt_info
*kvm_s390_get_io_int(struct kvm
*kvm
,
1234 u64 isc_mask
, u32 schid
)
1236 struct kvm_s390_interrupt_info
*inti
= NULL
;
1239 for (isc
= 0; isc
<= MAX_ISC
&& !inti
; isc
++) {
1240 if (isc_mask
& isc_to_isc_bits(isc
))
1241 inti
= get_io_int(kvm
, isc
, schid
);
1246 #define SCCB_MASK 0xFFFFFFF8
1247 #define SCCB_EVENT_PENDING 0x3
1249 static int __inject_service(struct kvm
*kvm
,
1250 struct kvm_s390_interrupt_info
*inti
)
1252 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1254 spin_lock(&fi
->lock
);
1255 fi
->srv_signal
.ext_params
|= inti
->ext
.ext_params
& SCCB_EVENT_PENDING
;
1257 * Early versions of the QEMU s390 bios will inject several
1258 * service interrupts after another without handling a
1259 * condition code indicating busy.
1260 * We will silently ignore those superfluous sccb values.
1261 * A future version of QEMU will take care of serialization
1264 if (fi
->srv_signal
.ext_params
& SCCB_MASK
)
1266 fi
->srv_signal
.ext_params
|= inti
->ext
.ext_params
& SCCB_MASK
;
1267 set_bit(IRQ_PEND_EXT_SERVICE
, &fi
->pending_irqs
);
1269 spin_unlock(&fi
->lock
);
1274 static int __inject_virtio(struct kvm
*kvm
,
1275 struct kvm_s390_interrupt_info
*inti
)
1277 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1279 spin_lock(&fi
->lock
);
1280 if (fi
->counters
[FIRQ_CNTR_VIRTIO
] >= KVM_S390_MAX_VIRTIO_IRQS
) {
1281 spin_unlock(&fi
->lock
);
1284 fi
->counters
[FIRQ_CNTR_VIRTIO
] += 1;
1285 list_add_tail(&inti
->list
, &fi
->lists
[FIRQ_LIST_VIRTIO
]);
1286 set_bit(IRQ_PEND_VIRTIO
, &fi
->pending_irqs
);
1287 spin_unlock(&fi
->lock
);
1291 static int __inject_pfault_done(struct kvm
*kvm
,
1292 struct kvm_s390_interrupt_info
*inti
)
1294 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1296 spin_lock(&fi
->lock
);
1297 if (fi
->counters
[FIRQ_CNTR_PFAULT
] >=
1298 (ASYNC_PF_PER_VCPU
* KVM_MAX_VCPUS
)) {
1299 spin_unlock(&fi
->lock
);
1302 fi
->counters
[FIRQ_CNTR_PFAULT
] += 1;
1303 list_add_tail(&inti
->list
, &fi
->lists
[FIRQ_LIST_PFAULT
]);
1304 set_bit(IRQ_PEND_PFAULT_DONE
, &fi
->pending_irqs
);
1305 spin_unlock(&fi
->lock
);
1309 #define CR_PENDING_SUBCLASS 28
1310 static int __inject_float_mchk(struct kvm
*kvm
,
1311 struct kvm_s390_interrupt_info
*inti
)
1313 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1315 spin_lock(&fi
->lock
);
1316 fi
->mchk
.cr14
|= inti
->mchk
.cr14
& (1UL << CR_PENDING_SUBCLASS
);
1317 fi
->mchk
.mcic
|= inti
->mchk
.mcic
;
1318 set_bit(IRQ_PEND_MCHK_REP
, &fi
->pending_irqs
);
1319 spin_unlock(&fi
->lock
);
1324 static int __inject_io(struct kvm
*kvm
, struct kvm_s390_interrupt_info
*inti
)
1326 struct kvm_s390_float_interrupt
*fi
;
1327 struct list_head
*list
;
1330 fi
= &kvm
->arch
.float_int
;
1331 spin_lock(&fi
->lock
);
1332 if (fi
->counters
[FIRQ_CNTR_IO
] >= KVM_S390_MAX_FLOAT_IRQS
) {
1333 spin_unlock(&fi
->lock
);
1336 fi
->counters
[FIRQ_CNTR_IO
] += 1;
1338 isc
= int_word_to_isc(inti
->io
.io_int_word
);
1339 list
= &fi
->lists
[FIRQ_LIST_IO_ISC_0
+ isc
];
1340 list_add_tail(&inti
->list
, list
);
1341 set_bit(IRQ_PEND_IO_ISC_0
+ isc
, &fi
->pending_irqs
);
1342 spin_unlock(&fi
->lock
);
1347 * Find a destination VCPU for a floating irq and kick it.
1349 static void __floating_irq_kick(struct kvm
*kvm
, u64 type
)
1351 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1352 struct kvm_s390_local_interrupt
*li
;
1353 struct kvm_vcpu
*dst_vcpu
;
1354 int sigcpu
, online_vcpus
, nr_tries
= 0;
1356 online_vcpus
= atomic_read(&kvm
->online_vcpus
);
1360 /* find idle VCPUs first, then round robin */
1361 sigcpu
= find_first_bit(fi
->idle_mask
, online_vcpus
);
1362 if (sigcpu
== online_vcpus
) {
1364 sigcpu
= fi
->next_rr_cpu
;
1365 fi
->next_rr_cpu
= (fi
->next_rr_cpu
+ 1) % online_vcpus
;
1366 /* avoid endless loops if all vcpus are stopped */
1367 if (nr_tries
++ >= online_vcpus
)
1369 } while (is_vcpu_stopped(kvm_get_vcpu(kvm
, sigcpu
)));
1371 dst_vcpu
= kvm_get_vcpu(kvm
, sigcpu
);
1373 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
1374 li
= &dst_vcpu
->arch
.local_int
;
1375 spin_lock(&li
->lock
);
1378 atomic_or(CPUSTAT_STOP_INT
, li
->cpuflags
);
1380 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1381 atomic_or(CPUSTAT_IO_INT
, li
->cpuflags
);
1384 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1387 spin_unlock(&li
->lock
);
1388 kvm_s390_vcpu_wakeup(dst_vcpu
);
1391 static int __inject_vm(struct kvm
*kvm
, struct kvm_s390_interrupt_info
*inti
)
1393 struct kvm_s390_float_interrupt
*fi
;
1394 u64 type
= READ_ONCE(inti
->type
);
1397 fi
= &kvm
->arch
.float_int
;
1401 rc
= __inject_float_mchk(kvm
, inti
);
1403 case KVM_S390_INT_VIRTIO
:
1404 rc
= __inject_virtio(kvm
, inti
);
1406 case KVM_S390_INT_SERVICE
:
1407 rc
= __inject_service(kvm
, inti
);
1409 case KVM_S390_INT_PFAULT_DONE
:
1410 rc
= __inject_pfault_done(kvm
, inti
);
1412 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1413 rc
= __inject_io(kvm
, inti
);
1421 __floating_irq_kick(kvm
, type
);
1425 int kvm_s390_inject_vm(struct kvm
*kvm
,
1426 struct kvm_s390_interrupt
*s390int
)
1428 struct kvm_s390_interrupt_info
*inti
;
1431 inti
= kzalloc(sizeof(*inti
), GFP_KERNEL
);
1435 inti
->type
= s390int
->type
;
1436 switch (inti
->type
) {
1437 case KVM_S390_INT_VIRTIO
:
1438 VM_EVENT(kvm
, 5, "inject: virtio parm:%x,parm64:%llx",
1439 s390int
->parm
, s390int
->parm64
);
1440 inti
->ext
.ext_params
= s390int
->parm
;
1441 inti
->ext
.ext_params2
= s390int
->parm64
;
1443 case KVM_S390_INT_SERVICE
:
1444 VM_EVENT(kvm
, 4, "inject: sclp parm:%x", s390int
->parm
);
1445 inti
->ext
.ext_params
= s390int
->parm
;
1447 case KVM_S390_INT_PFAULT_DONE
:
1448 inti
->ext
.ext_params2
= s390int
->parm64
;
1451 VM_EVENT(kvm
, 3, "inject: machine check mcic 0x%llx",
1453 inti
->mchk
.cr14
= s390int
->parm
; /* upper bits are not used */
1454 inti
->mchk
.mcic
= s390int
->parm64
;
1456 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1457 if (inti
->type
& KVM_S390_INT_IO_AI_MASK
)
1458 VM_EVENT(kvm
, 5, "%s", "inject: I/O (AI)");
1460 VM_EVENT(kvm
, 5, "inject: I/O css %x ss %x schid %04x",
1461 s390int
->type
& IOINT_CSSID_MASK
,
1462 s390int
->type
& IOINT_SSID_MASK
,
1463 s390int
->type
& IOINT_SCHID_MASK
);
1464 inti
->io
.subchannel_id
= s390int
->parm
>> 16;
1465 inti
->io
.subchannel_nr
= s390int
->parm
& 0x0000ffffu
;
1466 inti
->io
.io_int_parm
= s390int
->parm64
>> 32;
1467 inti
->io
.io_int_word
= s390int
->parm64
& 0x00000000ffffffffull
;
1473 trace_kvm_s390_inject_vm(s390int
->type
, s390int
->parm
, s390int
->parm64
,
1476 rc
= __inject_vm(kvm
, inti
);
1482 int kvm_s390_reinject_io_int(struct kvm
*kvm
,
1483 struct kvm_s390_interrupt_info
*inti
)
1485 return __inject_vm(kvm
, inti
);
1488 int s390int_to_s390irq(struct kvm_s390_interrupt
*s390int
,
1489 struct kvm_s390_irq
*irq
)
1491 irq
->type
= s390int
->type
;
1492 switch (irq
->type
) {
1493 case KVM_S390_PROGRAM_INT
:
1494 if (s390int
->parm
& 0xffff0000)
1496 irq
->u
.pgm
.code
= s390int
->parm
;
1498 case KVM_S390_SIGP_SET_PREFIX
:
1499 irq
->u
.prefix
.address
= s390int
->parm
;
1501 case KVM_S390_SIGP_STOP
:
1502 irq
->u
.stop
.flags
= s390int
->parm
;
1504 case KVM_S390_INT_EXTERNAL_CALL
:
1505 if (s390int
->parm
& 0xffff0000)
1507 irq
->u
.extcall
.code
= s390int
->parm
;
1509 case KVM_S390_INT_EMERGENCY
:
1510 if (s390int
->parm
& 0xffff0000)
1512 irq
->u
.emerg
.code
= s390int
->parm
;
1515 irq
->u
.mchk
.mcic
= s390int
->parm64
;
1521 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu
*vcpu
)
1523 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1525 return test_bit(IRQ_PEND_SIGP_STOP
, &li
->pending_irqs
);
1528 void kvm_s390_clear_stop_irq(struct kvm_vcpu
*vcpu
)
1530 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1532 spin_lock(&li
->lock
);
1533 li
->irq
.stop
.flags
= 0;
1534 clear_bit(IRQ_PEND_SIGP_STOP
, &li
->pending_irqs
);
1535 spin_unlock(&li
->lock
);
1538 static int do_inject_vcpu(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1542 switch (irq
->type
) {
1543 case KVM_S390_PROGRAM_INT
:
1544 rc
= __inject_prog(vcpu
, irq
);
1546 case KVM_S390_SIGP_SET_PREFIX
:
1547 rc
= __inject_set_prefix(vcpu
, irq
);
1549 case KVM_S390_SIGP_STOP
:
1550 rc
= __inject_sigp_stop(vcpu
, irq
);
1552 case KVM_S390_RESTART
:
1553 rc
= __inject_sigp_restart(vcpu
, irq
);
1555 case KVM_S390_INT_CLOCK_COMP
:
1556 rc
= __inject_ckc(vcpu
);
1558 case KVM_S390_INT_CPU_TIMER
:
1559 rc
= __inject_cpu_timer(vcpu
);
1561 case KVM_S390_INT_EXTERNAL_CALL
:
1562 rc
= __inject_extcall(vcpu
, irq
);
1564 case KVM_S390_INT_EMERGENCY
:
1565 rc
= __inject_sigp_emergency(vcpu
, irq
);
1568 rc
= __inject_mchk(vcpu
, irq
);
1570 case KVM_S390_INT_PFAULT_INIT
:
1571 rc
= __inject_pfault_init(vcpu
, irq
);
1573 case KVM_S390_INT_VIRTIO
:
1574 case KVM_S390_INT_SERVICE
:
1575 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1583 int kvm_s390_inject_vcpu(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1585 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1588 spin_lock(&li
->lock
);
1589 rc
= do_inject_vcpu(vcpu
, irq
);
1590 spin_unlock(&li
->lock
);
1592 kvm_s390_vcpu_wakeup(vcpu
);
1596 static inline void clear_irq_list(struct list_head
*_list
)
1598 struct kvm_s390_interrupt_info
*inti
, *n
;
1600 list_for_each_entry_safe(inti
, n
, _list
, list
) {
1601 list_del(&inti
->list
);
1606 static void inti_to_irq(struct kvm_s390_interrupt_info
*inti
,
1607 struct kvm_s390_irq
*irq
)
1609 irq
->type
= inti
->type
;
1610 switch (inti
->type
) {
1611 case KVM_S390_INT_PFAULT_INIT
:
1612 case KVM_S390_INT_PFAULT_DONE
:
1613 case KVM_S390_INT_VIRTIO
:
1614 irq
->u
.ext
= inti
->ext
;
1616 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1617 irq
->u
.io
= inti
->io
;
1622 void kvm_s390_clear_float_irqs(struct kvm
*kvm
)
1624 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1627 spin_lock(&fi
->lock
);
1628 fi
->pending_irqs
= 0;
1629 memset(&fi
->srv_signal
, 0, sizeof(fi
->srv_signal
));
1630 memset(&fi
->mchk
, 0, sizeof(fi
->mchk
));
1631 for (i
= 0; i
< FIRQ_LIST_COUNT
; i
++)
1632 clear_irq_list(&fi
->lists
[i
]);
1633 for (i
= 0; i
< FIRQ_MAX_COUNT
; i
++)
1634 fi
->counters
[i
] = 0;
1635 spin_unlock(&fi
->lock
);
1638 static int get_all_floating_irqs(struct kvm
*kvm
, u8 __user
*usrbuf
, u64 len
)
1640 struct kvm_s390_interrupt_info
*inti
;
1641 struct kvm_s390_float_interrupt
*fi
;
1642 struct kvm_s390_irq
*buf
;
1643 struct kvm_s390_irq
*irq
;
1649 if (len
> KVM_S390_FLIC_MAX_BUFFER
|| len
== 0)
1653 * We are already using -ENOMEM to signal
1654 * userspace it may retry with a bigger buffer,
1655 * so we need to use something else for this case
1661 max_irqs
= len
/ sizeof(struct kvm_s390_irq
);
1663 fi
= &kvm
->arch
.float_int
;
1664 spin_lock(&fi
->lock
);
1665 for (i
= 0; i
< FIRQ_LIST_COUNT
; i
++) {
1666 list_for_each_entry(inti
, &fi
->lists
[i
], list
) {
1667 if (n
== max_irqs
) {
1668 /* signal userspace to try again */
1672 inti_to_irq(inti
, &buf
[n
]);
1676 if (test_bit(IRQ_PEND_EXT_SERVICE
, &fi
->pending_irqs
)) {
1677 if (n
== max_irqs
) {
1678 /* signal userspace to try again */
1682 irq
= (struct kvm_s390_irq
*) &buf
[n
];
1683 irq
->type
= KVM_S390_INT_SERVICE
;
1684 irq
->u
.ext
= fi
->srv_signal
;
1687 if (test_bit(IRQ_PEND_MCHK_REP
, &fi
->pending_irqs
)) {
1688 if (n
== max_irqs
) {
1689 /* signal userspace to try again */
1693 irq
= (struct kvm_s390_irq
*) &buf
[n
];
1694 irq
->type
= KVM_S390_MCHK
;
1695 irq
->u
.mchk
= fi
->mchk
;
1700 spin_unlock(&fi
->lock
);
1701 if (!ret
&& n
> 0) {
1702 if (copy_to_user(usrbuf
, buf
, sizeof(struct kvm_s390_irq
) * n
))
1707 return ret
< 0 ? ret
: n
;
1710 static int flic_get_attr(struct kvm_device
*dev
, struct kvm_device_attr
*attr
)
1714 switch (attr
->group
) {
1715 case KVM_DEV_FLIC_GET_ALL_IRQS
:
1716 r
= get_all_floating_irqs(dev
->kvm
, (u8 __user
*) attr
->addr
,
1726 static inline int copy_irq_from_user(struct kvm_s390_interrupt_info
*inti
,
1729 struct kvm_s390_irq __user
*uptr
= (struct kvm_s390_irq __user
*) addr
;
1730 void *target
= NULL
;
1731 void __user
*source
;
1734 if (get_user(inti
->type
, (u64 __user
*)addr
))
1737 switch (inti
->type
) {
1738 case KVM_S390_INT_PFAULT_INIT
:
1739 case KVM_S390_INT_PFAULT_DONE
:
1740 case KVM_S390_INT_VIRTIO
:
1741 case KVM_S390_INT_SERVICE
:
1742 target
= (void *) &inti
->ext
;
1743 source
= &uptr
->u
.ext
;
1744 size
= sizeof(inti
->ext
);
1746 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1747 target
= (void *) &inti
->io
;
1748 source
= &uptr
->u
.io
;
1749 size
= sizeof(inti
->io
);
1752 target
= (void *) &inti
->mchk
;
1753 source
= &uptr
->u
.mchk
;
1754 size
= sizeof(inti
->mchk
);
1760 if (copy_from_user(target
, source
, size
))
1766 static int enqueue_floating_irq(struct kvm_device
*dev
,
1767 struct kvm_device_attr
*attr
)
1769 struct kvm_s390_interrupt_info
*inti
= NULL
;
1771 int len
= attr
->attr
;
1773 if (len
% sizeof(struct kvm_s390_irq
) != 0)
1775 else if (len
> KVM_S390_FLIC_MAX_BUFFER
)
1778 while (len
>= sizeof(struct kvm_s390_irq
)) {
1779 inti
= kzalloc(sizeof(*inti
), GFP_KERNEL
);
1783 r
= copy_irq_from_user(inti
, attr
->addr
);
1788 r
= __inject_vm(dev
->kvm
, inti
);
1793 len
-= sizeof(struct kvm_s390_irq
);
1794 attr
->addr
+= sizeof(struct kvm_s390_irq
);
1800 static struct s390_io_adapter
*get_io_adapter(struct kvm
*kvm
, unsigned int id
)
1802 if (id
>= MAX_S390_IO_ADAPTERS
)
1804 return kvm
->arch
.adapters
[id
];
1807 static int register_io_adapter(struct kvm_device
*dev
,
1808 struct kvm_device_attr
*attr
)
1810 struct s390_io_adapter
*adapter
;
1811 struct kvm_s390_io_adapter adapter_info
;
1813 if (copy_from_user(&adapter_info
,
1814 (void __user
*)attr
->addr
, sizeof(adapter_info
)))
1817 if ((adapter_info
.id
>= MAX_S390_IO_ADAPTERS
) ||
1818 (dev
->kvm
->arch
.adapters
[adapter_info
.id
] != NULL
))
1821 adapter
= kzalloc(sizeof(*adapter
), GFP_KERNEL
);
1825 INIT_LIST_HEAD(&adapter
->maps
);
1826 init_rwsem(&adapter
->maps_lock
);
1827 atomic_set(&adapter
->nr_maps
, 0);
1828 adapter
->id
= adapter_info
.id
;
1829 adapter
->isc
= adapter_info
.isc
;
1830 adapter
->maskable
= adapter_info
.maskable
;
1831 adapter
->masked
= false;
1832 adapter
->swap
= adapter_info
.swap
;
1833 dev
->kvm
->arch
.adapters
[adapter
->id
] = adapter
;
1838 int kvm_s390_mask_adapter(struct kvm
*kvm
, unsigned int id
, bool masked
)
1841 struct s390_io_adapter
*adapter
= get_io_adapter(kvm
, id
);
1843 if (!adapter
|| !adapter
->maskable
)
1845 ret
= adapter
->masked
;
1846 adapter
->masked
= masked
;
1850 static int kvm_s390_adapter_map(struct kvm
*kvm
, unsigned int id
, __u64 addr
)
1852 struct s390_io_adapter
*adapter
= get_io_adapter(kvm
, id
);
1853 struct s390_map_info
*map
;
1856 if (!adapter
|| !addr
)
1859 map
= kzalloc(sizeof(*map
), GFP_KERNEL
);
1864 INIT_LIST_HEAD(&map
->list
);
1865 map
->guest_addr
= addr
;
1866 map
->addr
= gmap_translate(kvm
->arch
.gmap
, addr
);
1867 if (map
->addr
== -EFAULT
) {
1871 ret
= get_user_pages_fast(map
->addr
, 1, 1, &map
->page
);
1875 down_write(&adapter
->maps_lock
);
1876 if (atomic_inc_return(&adapter
->nr_maps
) < MAX_S390_ADAPTER_MAPS
) {
1877 list_add_tail(&map
->list
, &adapter
->maps
);
1880 put_page(map
->page
);
1883 up_write(&adapter
->maps_lock
);
1890 static int kvm_s390_adapter_unmap(struct kvm
*kvm
, unsigned int id
, __u64 addr
)
1892 struct s390_io_adapter
*adapter
= get_io_adapter(kvm
, id
);
1893 struct s390_map_info
*map
, *tmp
;
1896 if (!adapter
|| !addr
)
1899 down_write(&adapter
->maps_lock
);
1900 list_for_each_entry_safe(map
, tmp
, &adapter
->maps
, list
) {
1901 if (map
->guest_addr
== addr
) {
1903 atomic_dec(&adapter
->nr_maps
);
1904 list_del(&map
->list
);
1905 put_page(map
->page
);
1910 up_write(&adapter
->maps_lock
);
1912 return found
? 0 : -EINVAL
;
1915 void kvm_s390_destroy_adapters(struct kvm
*kvm
)
1918 struct s390_map_info
*map
, *tmp
;
1920 for (i
= 0; i
< MAX_S390_IO_ADAPTERS
; i
++) {
1921 if (!kvm
->arch
.adapters
[i
])
1923 list_for_each_entry_safe(map
, tmp
,
1924 &kvm
->arch
.adapters
[i
]->maps
, list
) {
1925 list_del(&map
->list
);
1926 put_page(map
->page
);
1929 kfree(kvm
->arch
.adapters
[i
]);
1933 static int modify_io_adapter(struct kvm_device
*dev
,
1934 struct kvm_device_attr
*attr
)
1936 struct kvm_s390_io_adapter_req req
;
1937 struct s390_io_adapter
*adapter
;
1940 if (copy_from_user(&req
, (void __user
*)attr
->addr
, sizeof(req
)))
1943 adapter
= get_io_adapter(dev
->kvm
, req
.id
);
1947 case KVM_S390_IO_ADAPTER_MASK
:
1948 ret
= kvm_s390_mask_adapter(dev
->kvm
, req
.id
, req
.mask
);
1952 case KVM_S390_IO_ADAPTER_MAP
:
1953 ret
= kvm_s390_adapter_map(dev
->kvm
, req
.id
, req
.addr
);
1955 case KVM_S390_IO_ADAPTER_UNMAP
:
1956 ret
= kvm_s390_adapter_unmap(dev
->kvm
, req
.id
, req
.addr
);
1965 static int flic_set_attr(struct kvm_device
*dev
, struct kvm_device_attr
*attr
)
1969 struct kvm_vcpu
*vcpu
;
1971 switch (attr
->group
) {
1972 case KVM_DEV_FLIC_ENQUEUE
:
1973 r
= enqueue_floating_irq(dev
, attr
);
1975 case KVM_DEV_FLIC_CLEAR_IRQS
:
1976 kvm_s390_clear_float_irqs(dev
->kvm
);
1978 case KVM_DEV_FLIC_APF_ENABLE
:
1979 dev
->kvm
->arch
.gmap
->pfault_enabled
= 1;
1981 case KVM_DEV_FLIC_APF_DISABLE_WAIT
:
1982 dev
->kvm
->arch
.gmap
->pfault_enabled
= 0;
1984 * Make sure no async faults are in transition when
1985 * clearing the queues. So we don't need to worry
1986 * about late coming workers.
1988 synchronize_srcu(&dev
->kvm
->srcu
);
1989 kvm_for_each_vcpu(i
, vcpu
, dev
->kvm
)
1990 kvm_clear_async_pf_completion_queue(vcpu
);
1992 case KVM_DEV_FLIC_ADAPTER_REGISTER
:
1993 r
= register_io_adapter(dev
, attr
);
1995 case KVM_DEV_FLIC_ADAPTER_MODIFY
:
1996 r
= modify_io_adapter(dev
, attr
);
2005 static int flic_create(struct kvm_device
*dev
, u32 type
)
2009 if (dev
->kvm
->arch
.flic
)
2011 dev
->kvm
->arch
.flic
= dev
;
2015 static void flic_destroy(struct kvm_device
*dev
)
2017 dev
->kvm
->arch
.flic
= NULL
;
2021 /* s390 floating irq controller (flic) */
2022 struct kvm_device_ops kvm_flic_ops
= {
2024 .get_attr
= flic_get_attr
,
2025 .set_attr
= flic_set_attr
,
2026 .create
= flic_create
,
2027 .destroy
= flic_destroy
,
2030 static unsigned long get_ind_bit(__u64 addr
, unsigned long bit_nr
, bool swap
)
2034 bit
= bit_nr
+ (addr
% PAGE_SIZE
) * 8;
2036 return swap
? (bit
^ (BITS_PER_LONG
- 1)) : bit
;
2039 static struct s390_map_info
*get_map_info(struct s390_io_adapter
*adapter
,
2042 struct s390_map_info
*map
;
2047 list_for_each_entry(map
, &adapter
->maps
, list
) {
2048 if (map
->guest_addr
== addr
)
2054 static int adapter_indicators_set(struct kvm
*kvm
,
2055 struct s390_io_adapter
*adapter
,
2056 struct kvm_s390_adapter_int
*adapter_int
)
2059 int summary_set
, idx
;
2060 struct s390_map_info
*info
;
2063 info
= get_map_info(adapter
, adapter_int
->ind_addr
);
2066 map
= page_address(info
->page
);
2067 bit
= get_ind_bit(info
->addr
, adapter_int
->ind_offset
, adapter
->swap
);
2069 idx
= srcu_read_lock(&kvm
->srcu
);
2070 mark_page_dirty(kvm
, info
->guest_addr
>> PAGE_SHIFT
);
2071 set_page_dirty_lock(info
->page
);
2072 info
= get_map_info(adapter
, adapter_int
->summary_addr
);
2074 srcu_read_unlock(&kvm
->srcu
, idx
);
2077 map
= page_address(info
->page
);
2078 bit
= get_ind_bit(info
->addr
, adapter_int
->summary_offset
,
2080 summary_set
= test_and_set_bit(bit
, map
);
2081 mark_page_dirty(kvm
, info
->guest_addr
>> PAGE_SHIFT
);
2082 set_page_dirty_lock(info
->page
);
2083 srcu_read_unlock(&kvm
->srcu
, idx
);
2084 return summary_set
? 0 : 1;
2088 * < 0 - not injected due to error
2089 * = 0 - coalesced, summary indicator already active
2090 * > 0 - injected interrupt
2092 static int set_adapter_int(struct kvm_kernel_irq_routing_entry
*e
,
2093 struct kvm
*kvm
, int irq_source_id
, int level
,
2097 struct s390_io_adapter
*adapter
;
2099 /* We're only interested in the 0->1 transition. */
2102 adapter
= get_io_adapter(kvm
, e
->adapter
.adapter_id
);
2105 down_read(&adapter
->maps_lock
);
2106 ret
= adapter_indicators_set(kvm
, adapter
, &e
->adapter
);
2107 up_read(&adapter
->maps_lock
);
2108 if ((ret
> 0) && !adapter
->masked
) {
2109 struct kvm_s390_interrupt s390int
= {
2110 .type
= KVM_S390_INT_IO(1, 0, 0, 0),
2112 .parm64
= (adapter
->isc
<< 27) | 0x80000000,
2114 ret
= kvm_s390_inject_vm(kvm
, &s390int
);
2121 int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry
*e
,
2122 const struct kvm_irq_routing_entry
*ue
)
2127 case KVM_IRQ_ROUTING_S390_ADAPTER
:
2128 e
->set
= set_adapter_int
;
2129 e
->adapter
.summary_addr
= ue
->u
.adapter
.summary_addr
;
2130 e
->adapter
.ind_addr
= ue
->u
.adapter
.ind_addr
;
2131 e
->adapter
.summary_offset
= ue
->u
.adapter
.summary_offset
;
2132 e
->adapter
.ind_offset
= ue
->u
.adapter
.ind_offset
;
2133 e
->adapter
.adapter_id
= ue
->u
.adapter
.adapter_id
;
2143 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*e
, struct kvm
*kvm
,
2144 int irq_source_id
, int level
, bool line_status
)
2149 int kvm_s390_set_irq_state(struct kvm_vcpu
*vcpu
, void __user
*irqstate
, int len
)
2151 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
2152 struct kvm_s390_irq
*buf
;
2160 if (copy_from_user((void *) buf
, irqstate
, len
)) {
2166 * Don't allow setting the interrupt state
2167 * when there are already interrupts pending
2169 spin_lock(&li
->lock
);
2170 if (li
->pending_irqs
) {
2175 for (n
= 0; n
< len
/ sizeof(*buf
); n
++) {
2176 r
= do_inject_vcpu(vcpu
, &buf
[n
]);
2182 spin_unlock(&li
->lock
);
2189 static void store_local_irq(struct kvm_s390_local_interrupt
*li
,
2190 struct kvm_s390_irq
*irq
,
2191 unsigned long irq_type
)
2194 case IRQ_PEND_MCHK_EX
:
2195 case IRQ_PEND_MCHK_REP
:
2196 irq
->type
= KVM_S390_MCHK
;
2197 irq
->u
.mchk
= li
->irq
.mchk
;
2200 irq
->type
= KVM_S390_PROGRAM_INT
;
2201 irq
->u
.pgm
= li
->irq
.pgm
;
2203 case IRQ_PEND_PFAULT_INIT
:
2204 irq
->type
= KVM_S390_INT_PFAULT_INIT
;
2205 irq
->u
.ext
= li
->irq
.ext
;
2207 case IRQ_PEND_EXT_EXTERNAL
:
2208 irq
->type
= KVM_S390_INT_EXTERNAL_CALL
;
2209 irq
->u
.extcall
= li
->irq
.extcall
;
2211 case IRQ_PEND_EXT_CLOCK_COMP
:
2212 irq
->type
= KVM_S390_INT_CLOCK_COMP
;
2214 case IRQ_PEND_EXT_CPU_TIMER
:
2215 irq
->type
= KVM_S390_INT_CPU_TIMER
;
2217 case IRQ_PEND_SIGP_STOP
:
2218 irq
->type
= KVM_S390_SIGP_STOP
;
2219 irq
->u
.stop
= li
->irq
.stop
;
2221 case IRQ_PEND_RESTART
:
2222 irq
->type
= KVM_S390_RESTART
;
2224 case IRQ_PEND_SET_PREFIX
:
2225 irq
->type
= KVM_S390_SIGP_SET_PREFIX
;
2226 irq
->u
.prefix
= li
->irq
.prefix
;
2231 int kvm_s390_get_irq_state(struct kvm_vcpu
*vcpu
, __u8 __user
*buf
, int len
)
2233 uint8_t sigp_ctrl
= vcpu
->kvm
->arch
.sca
->cpu
[vcpu
->vcpu_id
].sigp_ctrl
;
2234 unsigned long sigp_emerg_pending
[BITS_TO_LONGS(KVM_MAX_VCPUS
)];
2235 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
2236 unsigned long pending_irqs
;
2237 struct kvm_s390_irq irq
;
2238 unsigned long irq_type
;
2242 spin_lock(&li
->lock
);
2243 pending_irqs
= li
->pending_irqs
;
2244 memcpy(&sigp_emerg_pending
, &li
->sigp_emerg_pending
,
2245 sizeof(sigp_emerg_pending
));
2246 spin_unlock(&li
->lock
);
2248 for_each_set_bit(irq_type
, &pending_irqs
, IRQ_PEND_COUNT
) {
2249 memset(&irq
, 0, sizeof(irq
));
2250 if (irq_type
== IRQ_PEND_EXT_EMERGENCY
)
2252 if (n
+ sizeof(irq
) > len
)
2254 store_local_irq(&vcpu
->arch
.local_int
, &irq
, irq_type
);
2255 if (copy_to_user(&buf
[n
], &irq
, sizeof(irq
)))
2260 if (test_bit(IRQ_PEND_EXT_EMERGENCY
, &pending_irqs
)) {
2261 for_each_set_bit(cpuaddr
, sigp_emerg_pending
, KVM_MAX_VCPUS
) {
2262 memset(&irq
, 0, sizeof(irq
));
2263 if (n
+ sizeof(irq
) > len
)
2265 irq
.type
= KVM_S390_INT_EMERGENCY
;
2266 irq
.u
.emerg
.code
= cpuaddr
;
2267 if (copy_to_user(&buf
[n
], &irq
, sizeof(irq
)))
2273 if ((sigp_ctrl
& SIGP_CTRL_C
) &&
2274 (atomic_read(&vcpu
->arch
.sie_block
->cpuflags
) &
2275 CPUSTAT_ECALL_PEND
)) {
2276 if (n
+ sizeof(irq
) > len
)
2278 memset(&irq
, 0, sizeof(irq
));
2279 irq
.type
= KVM_S390_INT_EXTERNAL_CALL
;
2280 irq
.u
.extcall
.code
= sigp_ctrl
& SIGP_CTRL_SCN_MASK
;
2281 if (copy_to_user(&buf
[n
], &irq
, sizeof(irq
)))