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KVM: s390: kvm_s390_vm_start_migration: check dirty_bitmap before using it as target...
[mirror_ubuntu-kernels.git] / arch / s390 / kvm / interrupt.c
CommitLineData
d809aa23 1// SPDX-License-Identifier: GPL-2.0
ba5c1e9b 2/*
a53c8fab 3 * handling kvm guest interrupts
ba5c1e9b 4 *
33b412ac 5 * Copyright IBM Corp. 2008, 2015
ba5c1e9b 6 *
ba5c1e9b
CO		 7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 */
9
1282c21e
MM		 10#define KMSG_COMPONENT "kvm-s390"
11#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
ca872302 13#include <linux/interrupt.h>
ba5c1e9b 14#include <linux/kvm_host.h>
cbb870c8 15#include <linux/hrtimer.h>
84223598 16#include <linux/mmu_context.h>
58616e6a 17#include <linux/nospec.h>
3cd61299 18#include <linux/signal.h>
5a0e3ad6 19#include <linux/slab.h>
383d0b05 20#include <linux/bitmap.h>
94aa033e 21#include <linux/vmalloc.h>
cbb870c8 22#include <asm/asm-offsets.h>
33b412ac 23#include <asm/dis.h>
7c0f6ba6 24#include <linux/uaccess.h>
ea5f4969 25#include <asm/sclp.h>
6d3da241 26#include <asm/isc.h>
1e133ab2 27#include <asm/gmap.h>
0319dae6 28#include <asm/switch_to.h>
ff5dc149 29#include <asm/nmi.h>
9f30f621 30#include <asm/airq.h>
ba5c1e9b
CO		 31#include "kvm-s390.h"
32#include "gaccess.h"
ade38c31 33#include "trace-s390.h"
ba5c1e9b 34
44c6ca3d 35#define PFAULT_INIT 0x0600
60f90a14
JF		 36#define PFAULT_DONE 0x0680
37#define VIRTIO_PARAM 0x0d00
d8346b7d 38
1282c21e
MM		 39static struct kvm_s390_gib *gib;
40
a5bd7647
ED		 41/* handle external calls via sigp interpretation facility */
42static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id)
43{
7d43bafc
ED		 44 int c, scn;
45
8d5fb0dc 46 if (!kvm_s390_test_cpuflags(vcpu, CPUSTAT_ECALL_PEND))
2c1bb2be
DH		 47 return 0;
48
a6940674 49 BUG_ON(!kvm_s390_use_sca_entries());
5e044315 50 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 51 if (vcpu->kvm->arch.use_esca) {
52 struct esca_block *sca = vcpu->kvm->arch.sca;
53 union esca_sigp_ctrl sigp_ctrl =
54 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
55
56 c = sigp_ctrl.c;
57 scn = sigp_ctrl.scn;
58 } else {
59 struct bsca_block *sca = vcpu->kvm->arch.sca;
60 union bsca_sigp_ctrl sigp_ctrl =
61 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
62
63 c = sigp_ctrl.c;
64 scn = sigp_ctrl.scn;
65 }
5e044315 66 read_unlock(&vcpu->kvm->arch.sca_lock);
a5bd7647
ED		 67
68 if (src_id)
7d43bafc 69 *src_id = scn;
a5bd7647 70
2c1bb2be 71 return c;
a5bd7647
ED		 72}
73
74static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id)
75{
bc784cce 76 int expect, rc;
a5bd7647 77
a6940674 78 BUG_ON(!kvm_s390_use_sca_entries());
5e044315 79 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 80 if (vcpu->kvm->arch.use_esca) {
81 struct esca_block *sca = vcpu->kvm->arch.sca;
82 union esca_sigp_ctrl *sigp_ctrl =
83 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
84 union esca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
85
86 new_val.scn = src_id;
87 new_val.c = 1;
88 old_val.c = 0;
89
90 expect = old_val.value;
91 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
92 } else {
93 struct bsca_block *sca = vcpu->kvm->arch.sca;
94 union bsca_sigp_ctrl *sigp_ctrl =
95 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
96 union bsca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
bc784cce 97
7d43bafc
ED		 98 new_val.scn = src_id;
99 new_val.c = 1;
100 old_val.c = 0;
101
102 expect = old_val.value;
103 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
104 }
5e044315 105 read_unlock(&vcpu->kvm->arch.sca_lock);
bc784cce
ED		 106
107 if (rc != expect) {
a5bd7647
ED		 108 /* another external call is pending */
109 return -EBUSY;
110 }
ef8f4f49 111 kvm_s390_set_cpuflags(vcpu, CPUSTAT_ECALL_PEND);
a5bd7647
ED		 112 return 0;
113}
114
115static void sca_clear_ext_call(struct kvm_vcpu *vcpu)
116{
7d43bafc 117 int rc, expect;
a5bd7647 118
a6940674
DH		 119 if (!kvm_s390_use_sca_entries())
120 return;
9daecfc6 121 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_ECALL_PEND);
5e044315 122 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 123 if (vcpu->kvm->arch.use_esca) {
124 struct esca_block *sca = vcpu->kvm->arch.sca;
125 union esca_sigp_ctrl *sigp_ctrl =
126 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
127 union esca_sigp_ctrl old = *sigp_ctrl;
128
129 expect = old.value;
130 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
131 } else {
132 struct bsca_block *sca = vcpu->kvm->arch.sca;
133 union bsca_sigp_ctrl *sigp_ctrl =
134 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
135 union bsca_sigp_ctrl old = *sigp_ctrl;
136
137 expect = old.value;
138 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
139 }
5e044315 140 read_unlock(&vcpu->kvm->arch.sca_lock);
7d43bafc 141 WARN_ON(rc != expect); /* cannot clear? */
a5bd7647
ED		 142}
143
3c038e6b 144int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 145{
146 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
147}
148
d8346b7d
CH		 149static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
150{
151 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
152}
153
48a3e950
CH		 154static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
155{
156 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
157}
158
ba5c1e9b
CO		 159static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
160{
fee0e0fd
DH		 161 return psw_extint_disabled(vcpu) &&
162 psw_ioint_disabled(vcpu) &&
163 psw_mchk_disabled(vcpu);
ba5c1e9b
CO		 164}
165
bb78c5ec
DH		 166static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
167{
168 if (psw_extint_disabled(vcpu) ||
b9224cd7 169 !(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK))
bb78c5ec 170 return 0;
f71d0dc5
DH		 171 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
172 /* No timer interrupts when single stepping */
173 return 0;
bb78c5ec
DH		 174 return 1;
175}
176
b4aec925
DH		 177static int ckc_irq_pending(struct kvm_vcpu *vcpu)
178{
5fe01793
DH		 179 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
180 const u64 ckc = vcpu->arch.sie_block->ckc;
181
b9224cd7 182 if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) {
5fe01793
DH		 183 if ((s64)ckc >= (s64)now)
184 return 0;
185 } else if (ckc >= now) {
b4aec925 186 return 0;
5fe01793 187 }
b4aec925
DH		 188 return ckc_interrupts_enabled(vcpu);
189}
190
191static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
192{
193 return !psw_extint_disabled(vcpu) &&
b9224cd7 194 (vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK);
b4aec925
DH		 195}
196
197static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
198{
4287f247
DH		 199 if (!cpu_timer_interrupts_enabled(vcpu))
200 return 0;
201 return kvm_s390_get_cpu_timer(vcpu) >> 63;
b4aec925
DH		 202}
203
6d3da241
JF		 204static uint64_t isc_to_isc_bits(int isc)
205{
79fd50c6
CH		 206 return (0x80 >> isc) << 24;
207}
208
2496c8e7
MM		 209static inline u32 isc_to_int_word(u8 isc)
210{
211 return ((u32)isc << 27) | 0x80000000;
212}
213
6d3da241 214static inline u8 int_word_to_isc(u32 int_word)
ba5c1e9b 215{
6d3da241
JF		 216 return (int_word & 0x38000000) >> 27;
217}
218
d77e6414
MM		 219/*
220 * To use atomic bitmap functions, we have to provide a bitmap address
221 * that is u64 aligned. However, the ipm might be u32 aligned.
222 * Therefore, we logically start the bitmap at the very beginning of the
223 * struct and fixup the bit number.
224 */
225#define IPM_BIT_OFFSET (offsetof(struct kvm_s390_gisa, ipm) * BITS_PER_BYTE)
226
6cff2e10
MM		 227/**
228 * gisa_set_iam - change the GISA interruption alert mask
229 *
230 * @gisa: gisa to operate on
231 * @iam: new IAM value to use
232 *
233 * Change the IAM atomically with the next alert address and the IPM
234 * of the GISA if the GISA is not part of the GIB alert list. All three
235 * fields are located in the first long word of the GISA.
236 *
237 * Returns: 0 on success
238 * -EBUSY in case the gisa is part of the alert list
239 */
240static inline int gisa_set_iam(struct kvm_s390_gisa *gisa, u8 iam)
241{
242 u64 word, _word;
243
244 do {
245 word = READ_ONCE(gisa->u64.word[0]);
246 if ((u64)gisa != word >> 32)
247 return -EBUSY;
248 _word = (word & ~0xffUL) | iam;
249 } while (cmpxchg(&gisa->u64.word[0], word, _word) != word);
250
251 return 0;
252}
253
174dd4f8
MM		 254/**
255 * gisa_clear_ipm - clear the GISA interruption pending mask
256 *
257 * @gisa: gisa to operate on
258 *
259 * Clear the IPM atomically with the next alert address and the IAM
260 * of the GISA unconditionally. All three fields are located in the
261 * first long word of the GISA.
262 */
263static inline void gisa_clear_ipm(struct kvm_s390_gisa *gisa)
264{
265 u64 word, _word;
266
267 do {
268 word = READ_ONCE(gisa->u64.word[0]);
269 _word = word & ~(0xffUL << 24);
270 } while (cmpxchg(&gisa->u64.word[0], word, _word) != word);
271}
272
9f30f621
MM		 273/**
274 * gisa_get_ipm_or_restore_iam - return IPM or restore GISA IAM
275 *
276 * @gi: gisa interrupt struct to work on
277 *
278 * Atomically restores the interruption alert mask if none of the
279 * relevant ISCs are pending and return the IPM.
280 *
281 * Returns: the relevant pending ISCs
282 */
283static inline u8 gisa_get_ipm_or_restore_iam(struct kvm_s390_gisa_interrupt *gi)
284{
285 u8 pending_mask, alert_mask;
286 u64 word, _word;
287
288 do {
289 word = READ_ONCE(gi->origin->u64.word[0]);
290 alert_mask = READ_ONCE(gi->alert.mask);
291 pending_mask = (u8)(word >> 24) & alert_mask;
292 if (pending_mask)
293 return pending_mask;
294 _word = (word & ~0xffUL) | alert_mask;
295 } while (cmpxchg(&gi->origin->u64.word[0], word, _word) != word);
296
297 return 0;
298}
299
300static inline int gisa_in_alert_list(struct kvm_s390_gisa *gisa)
301{
302 return READ_ONCE(gisa->next_alert) != (u32)(u64)gisa;
303}
304
bb2fb8cd 305static inline void gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
d77e6414
MM		 306{
307 set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
308}
309
bb2fb8cd 310static inline u8 gisa_get_ipm(struct kvm_s390_gisa *gisa)
d77e6414
MM		 311{
312 return READ_ONCE(gisa->ipm);
313}
314
bb2fb8cd 315static inline void gisa_clear_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
d77e6414
MM		 316{
317 clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
318}
319
bb2fb8cd 320static inline int gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
d77e6414
MM		 321{
322 return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
323}
324
8846f317 325static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu)
6d3da241 326{
5f94c58e 327 return vcpu->kvm->arch.float_int.pending_irqs |
8846f317
CB		 328 vcpu->arch.local_int.pending_irqs;
329}
330
331static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
332{
b9fa6d6e
MM		 333 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
334 unsigned long pending_mask;
335
336 pending_mask = pending_irqs_no_gisa(vcpu);
337 if (gi->origin)
338 pending_mask |= gisa_get_ipm(gi->origin) << IRQ_PEND_IO_ISC_7;
339 return pending_mask;
383d0b05
JF		 340}
341
ee739f4b
MM		 342static inline int isc_to_irq_type(unsigned long isc)
343{
c7901a6e 344 return IRQ_PEND_IO_ISC_0 - isc;
ee739f4b
MM		 345}
346
347static inline int irq_type_to_isc(unsigned long irq_type)
348{
c7901a6e 349 return IRQ_PEND_IO_ISC_0 - irq_type;
ee739f4b
MM		 350}
351
6d3da241
JF		 352static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
353 unsigned long active_mask)
354{
355 int i;
356
357 for (i = 0; i <= MAX_ISC; i++)
358 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
ee739f4b 359 active_mask &= ~(1UL << (isc_to_irq_type(i)));
6d3da241
JF		 360
361 return active_mask;
362}
363
364static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
383d0b05 365{
6d3da241
JF		 366 unsigned long active_mask;
367
5f94c58e 368 active_mask = pending_irqs(vcpu);
ffeca0ae
JF		 369 if (!active_mask)
370 return 0;
383d0b05
JF		 371
372 if (psw_extint_disabled(vcpu))
373 active_mask &= ~IRQ_PEND_EXT_MASK;
6d3da241
JF		 374 if (psw_ioint_disabled(vcpu))
375 active_mask &= ~IRQ_PEND_IO_MASK;
376 else
377 active_mask = disable_iscs(vcpu, active_mask);
b9224cd7 378 if (!(vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK))
383d0b05 379 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
b9224cd7 380 if (!(vcpu->arch.sie_block->gcr[0] & CR0_EMERGENCY_SIGNAL_SUBMASK))
383d0b05 381 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
b9224cd7 382 if (!(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK))
383d0b05 383 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
b9224cd7 384 if (!(vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK))
383d0b05 385 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
b9224cd7 386 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK))
6d3da241 387 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
383d0b05
JF		 388 if (psw_mchk_disabled(vcpu))
389 active_mask &= ~IRQ_PEND_MCHK_MASK;
4d62fcc0
QH		 390 /*
391 * Check both floating and local interrupt's cr14 because
392 * bit IRQ_PEND_MCHK_REP could be set in both cases.
393 */
6d3da241 394 if (!(vcpu->arch.sie_block->gcr[14] &
4d62fcc0
QH		 395 (vcpu->kvm->arch.float_int.mchk.cr14 |
396 vcpu->arch.local_int.irq.mchk.cr14)))
6d3da241 397 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
383d0b05 398
6cddd432
DH		 399 /*
400 * STOP irqs will never be actively delivered. They are triggered via
401 * intercept requests and cleared when the stop intercept is performed.
402 */
403 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
404
383d0b05
JF		 405 return active_mask;
406}
407
ba5c1e9b
CO		 408static void __set_cpu_idle(struct kvm_vcpu *vcpu)
409{
ef8f4f49 410 kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT);
246b7218 411 set_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
ba5c1e9b
CO		 412}
413
414static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
415{
9daecfc6 416 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT);
246b7218 417 clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
ba5c1e9b
CO		 418}
419
420static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
421{
9daecfc6
DH		 422 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IO_INT | CPUSTAT_EXT_INT |
423 CPUSTAT_STOP_INT);
ba5c1e9b 424 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 425 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
426
427 if (guestdbg_enabled(vcpu)) {
428 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
429 LCTL_CR10 | LCTL_CR11);
430 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
431 }
ba5c1e9b
CO		 432}
433
6d3da241
JF		 434static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
435{
8846f317 436 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK))
6d3da241 437 return;
b7d45571 438 if (psw_ioint_disabled(vcpu))
2018224d 439 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT);
6d3da241
JF		 440 else
441 vcpu->arch.sie_block->lctl |= LCTL_CR6;
442}
443
383d0b05
JF		 444static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
445{
96723d32 446 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK))
383d0b05
JF		 447 return;
448 if (psw_extint_disabled(vcpu))
2018224d 449 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
383d0b05
JF		 450 else
451 vcpu->arch.sie_block->lctl |= LCTL_CR0;
452}
453
454static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
455{
96723d32 456 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK))
383d0b05
JF		 457 return;
458 if (psw_mchk_disabled(vcpu))
459 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
460 else
461 vcpu->arch.sie_block->lctl |= LCTL_CR14;
462}
463
6cddd432
DH		 464static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
465{
466 if (kvm_s390_is_stop_irq_pending(vcpu))
2018224d 467 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
6cddd432
DH		 468}
469
6d3da241
JF		 470/* Set interception request for non-deliverable interrupts */
471static void set_intercept_indicators(struct kvm_vcpu *vcpu)
383d0b05 472{
6d3da241 473 set_intercept_indicators_io(vcpu);
383d0b05
JF		 474 set_intercept_indicators_ext(vcpu);
475 set_intercept_indicators_mchk(vcpu);
6cddd432 476 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 477}
478
0fb97abe
JF		 479static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
480{
383d0b05 481 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 482 int rc;
483
ccc40c53 484 vcpu->stat.deliver_cputm++;
0fb97abe
JF		 485 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
486 0, 0);
487
488 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
489 (u16 *)__LC_EXT_INT_CODE);
467fc298 490 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 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,
494 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 495 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 496 return rc ? -EFAULT : 0;
0fb97abe
JF		 497}
498
499static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
500{
383d0b05 501 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 502 int rc;
503
ccc40c53 504 vcpu->stat.deliver_ckc++;
0fb97abe
JF		 505 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
506 0, 0);
507
508 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
509 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 510 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 511 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
512 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
513 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
514 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 515 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 516 return rc ? -EFAULT : 0;
0fb97abe
JF		 517}
518
383d0b05 519static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 520{
383d0b05
JF		 521 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
522 struct kvm_s390_ext_info ext;
0fb97abe
JF		 523 int rc;
524
383d0b05
JF		 525 spin_lock(&li->lock);
526 ext = li->irq.ext;
527 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
528 li->irq.ext.ext_params2 = 0;
529 spin_unlock(&li->lock);
530
3f24ba15
CB		 531 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
532 ext.ext_params2);
0fb97abe
JF		 533 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
534 KVM_S390_INT_PFAULT_INIT,
383d0b05 535 0, ext.ext_params2);
0fb97abe
JF		 536
537 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
538 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
539 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
540 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
541 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
542 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 543 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 544 return rc ? -EFAULT : 0;
0fb97abe
JF		 545}
546
d6404ded
DH		 547static int __write_machine_check(struct kvm_vcpu *vcpu,
548 struct kvm_s390_mchk_info *mchk)
549{
550 unsigned long ext_sa_addr;
4e0b1ab7 551 unsigned long lc;
0319dae6 552 freg_t fprs[NUM_FPRS];
ff5dc149 553 union mci mci;
d6404ded
DH		 554 int rc;
555
ff5dc149 556 mci.val = mchk->mcic;
31d8b8d4 557 /* take care of lazy register loading */
0319dae6
DH		 558 save_fpu_regs();
559 save_access_regs(vcpu->run->s.regs.acrs);
80248559
CB		 560 if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
561 save_gs_cb(current->thread.gs_cb);
0319dae6 562
d6404ded 563 /* Extended save area */
916cda1a
MS		 564 rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,
565 sizeof(unsigned long));
4e0b1ab7
FZ		 566 /* Only bits 0 through 63-LC are used for address formation */
567 lc = ext_sa_addr & MCESA_LC_MASK;
568 if (test_kvm_facility(vcpu->kvm, 133)) {
569 switch (lc) {
570 case 0:
571 case 10:
572 ext_sa_addr &= ~0x3ffUL;
573 break;
574 case 11:
575 ext_sa_addr &= ~0x7ffUL;
576 break;
577 case 12:
578 ext_sa_addr &= ~0xfffUL;
579 break;
580 default:
581 ext_sa_addr = 0;
582 break;
583 }
584 } else {
585 ext_sa_addr &= ~0x3ffUL;
586 }
587
ff5dc149
DH		 588 if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
589 if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
590 512))
591 mci.vr = 0;
592 } else {
593 mci.vr = 0;
594 }
4e0b1ab7
FZ		 595 if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133)
596 && (lc == 11 || lc == 12)) {
597 if (write_guest_abs(vcpu, ext_sa_addr + 1024,
598 &vcpu->run->s.regs.gscb, 32))
599 mci.gs = 0;
600 } else {
601 mci.gs = 0;
602 }
d6404ded
DH		 603
604 /* General interruption information */
0319dae6 605 rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
d6404ded
DH		 606 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
607 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
608 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
609 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ff5dc149 610 rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);
d6404ded
DH		 611
612 /* Register-save areas */
0319dae6
DH		 613 if (MACHINE_HAS_VX) {
614 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
615 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
616 } else {
617 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA,
618 vcpu->run->s.regs.fprs, 128);
619 }
620 rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA,
621 vcpu->run->s.regs.gprs, 128);
622 rc |= put_guest_lc(vcpu, current->thread.fpu.fpc,
623 (u32 __user *) __LC_FP_CREG_SAVE_AREA);
624 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr,
625 (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA);
626 rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu),
627 (u64 __user *) __LC_CPU_TIMER_SAVE_AREA);
628 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8,
629 (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA);
630 rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA,
631 &vcpu->run->s.regs.acrs, 64);
632 rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA,
633 &vcpu->arch.sie_block->gcr, 128);
d6404ded
DH		 634
635 /* Extended interruption information */
8953fb08
DH		 636 rc |= put_guest_lc(vcpu, mchk->ext_damage_code,
637 (u32 __user *) __LC_EXT_DAMAGE_CODE);
d6404ded
DH		 638 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
639 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
640 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout,
641 sizeof(mchk->fixed_logout));
642 return rc ? -EFAULT : 0;
643}
644
383d0b05 645static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 646{
6d3da241 647 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
383d0b05 648 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
6d3da241 649 struct kvm_s390_mchk_info mchk = {};
6d3da241
JF		 650 int deliver = 0;
651 int rc = 0;
0fb97abe 652
6d3da241 653 spin_lock(&fi->lock);
383d0b05 654 spin_lock(&li->lock);
6d3da241
JF		 655 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
656 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
657 /*
658 * If there was an exigent machine check pending, then any
659 * repressible machine checks that might have been pending
660 * are indicated along with it, so always clear bits for
661 * repressible and exigent interrupts
662 */
663 mchk = li->irq.mchk;
664 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
665 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
666 memset(&li->irq.mchk, 0, sizeof(mchk));
667 deliver = 1;
668 }
383d0b05 669 /*
6d3da241
JF		 670 * We indicate floating repressible conditions along with
671 * other pending conditions. Channel Report Pending and Channel
672 * Subsystem damage are the only two and and are indicated by
673 * bits in mcic and masked in cr14.
383d0b05 674 */
6d3da241
JF		 675 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
676 mchk.mcic |= fi->mchk.mcic;
677 mchk.cr14 |= fi->mchk.cr14;
678 memset(&fi->mchk, 0, sizeof(mchk));
679 deliver = 1;
680 }
383d0b05 681 spin_unlock(&li->lock);
6d3da241 682 spin_unlock(&fi->lock);
383d0b05 683
6d3da241 684 if (deliver) {
3f24ba15 685 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
6d3da241
JF		 686 mchk.mcic);
687 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
688 KVM_S390_MCHK,
689 mchk.cr14, mchk.mcic);
32de0749 690 vcpu->stat.deliver_machine_check++;
d6404ded 691 rc = __write_machine_check(vcpu, &mchk);
6d3da241 692 }
d6404ded 693 return rc;
0fb97abe
JF		 694}
695
696static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
697{
383d0b05 698 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 699 int rc;
700
3f24ba15 701 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
0fb97abe
JF		 702 vcpu->stat.deliver_restart_signal++;
703 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
704
705 rc = write_guest_lc(vcpu,
c667aeac 706 offsetof(struct lowcore, restart_old_psw),
0fb97abe 707 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
c667aeac 708 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw),
0fb97abe 709 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 710 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 711 return rc ? -EFAULT : 0;
0fb97abe
JF		 712}
713
383d0b05 714static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 715{
383d0b05
JF		 716 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
717 struct kvm_s390_prefix_info prefix;
718
719 spin_lock(&li->lock);
720 prefix = li->irq.prefix;
721 li->irq.prefix.address = 0;
722 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
723 spin_unlock(&li->lock);
0fb97abe 724
0fb97abe
JF		 725 vcpu->stat.deliver_prefix_signal++;
726 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
727 KVM_S390_SIGP_SET_PREFIX,
383d0b05 728 prefix.address, 0);
0fb97abe 729
383d0b05 730 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 731 return 0;
732}
733
383d0b05 734static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 735{
383d0b05 736 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 737 int rc;
383d0b05
JF		 738 int cpu_addr;
739
740 spin_lock(&li->lock);
741 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
742 clear_bit(cpu_addr, li->sigp_emerg_pending);
743 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
744 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
745 spin_unlock(&li->lock);
0fb97abe 746
3f24ba15 747 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
0fb97abe 748 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 749 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
750 cpu_addr, 0);
0fb97abe
JF		 751
752 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
753 (u16 *)__LC_EXT_INT_CODE);
383d0b05 754 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 755 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
756 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
757 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
758 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 759 return rc ? -EFAULT : 0;
0fb97abe
JF		 760}
761
383d0b05 762static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 763{
383d0b05
JF		 764 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
765 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 766 int rc;
767
383d0b05
JF		 768 spin_lock(&li->lock);
769 extcall = li->irq.extcall;
770 li->irq.extcall.code = 0;
771 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
772 spin_unlock(&li->lock);
773
3f24ba15 774 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
0fb97abe
JF		 775 vcpu->stat.deliver_external_call++;
776 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
777 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 778 extcall.code, 0);
0fb97abe
JF		 779
780 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
781 (u16 *)__LC_EXT_INT_CODE);
383d0b05 782 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 783 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
784 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
785 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
786 sizeof(psw_t));
99e20009 787 return rc ? -EFAULT : 0;
0fb97abe
JF		 788}
789
383d0b05 790static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 791{
383d0b05
JF		 792 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
793 struct kvm_s390_pgm_info pgm_info;
a9a846fd 794 int rc = 0, nullifying = false;
634790b8 795 u16 ilen;
8712836b 796
383d0b05
JF		 797 spin_lock(&li->lock);
798 pgm_info = li->irq.pgm;
799 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
800 memset(&li->irq.pgm, 0, sizeof(pgm_info));
801 spin_unlock(&li->lock);
802
634790b8 803 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
0e8bc06a
DH		 804 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
805 pgm_info.code, ilen);
ccc40c53 806 vcpu->stat.deliver_program++;
0fb97abe 807 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 808 pgm_info.code, 0);
0fb97abe 809
383d0b05 810 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 811 case PGM_AFX_TRANSLATION:
812 case PGM_ASX_TRANSLATION:
813 case PGM_EX_TRANSLATION:
814 case PGM_LFX_TRANSLATION:
815 case PGM_LSTE_SEQUENCE:
816 case PGM_LSX_TRANSLATION:
817 case PGM_LX_TRANSLATION:
818 case PGM_PRIMARY_AUTHORITY:
819 case PGM_SECONDARY_AUTHORITY:
a9a846fd
TH		 820 nullifying = true;
821 /* fall through */
8712836b 822 case PGM_SPACE_SWITCH:
383d0b05 823 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 824 (u64 *)__LC_TRANS_EXC_CODE);
825 break;
826 case PGM_ALEN_TRANSLATION:
827 case PGM_ALE_SEQUENCE:
828 case PGM_ASTE_INSTANCE:
829 case PGM_ASTE_SEQUENCE:
830 case PGM_ASTE_VALIDITY:
831 case PGM_EXTENDED_AUTHORITY:
383d0b05 832 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 833 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 834 nullifying = true;
8712836b
DH		 835 break;
836 case PGM_ASCE_TYPE:
837 case PGM_PAGE_TRANSLATION:
838 case PGM_REGION_FIRST_TRANS:
839 case PGM_REGION_SECOND_TRANS:
840 case PGM_REGION_THIRD_TRANS:
841 case PGM_SEGMENT_TRANSLATION:
383d0b05 842 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 843 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 844 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 845 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 846 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 847 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 848 nullifying = true;
8712836b
DH		 849 break;
850 case PGM_MONITOR:
383d0b05 851 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 852 (u16 *)__LC_MON_CLASS_NR);
383d0b05 853 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 854 (u64 *)__LC_MON_CODE);
855 break;
403c8648 856 case PGM_VECTOR_PROCESSING:
8712836b 857 case PGM_DATA:
383d0b05 858 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 859 (u32 *)__LC_DATA_EXC_CODE);
860 break;
861 case PGM_PROTECTION:
383d0b05 862 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 863 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 864 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 865 (u8 *)__LC_EXC_ACCESS_ID);
866 break;
a9a846fd
TH		 867 case PGM_STACK_FULL:
868 case PGM_STACK_EMPTY:
869 case PGM_STACK_SPECIFICATION:
870 case PGM_STACK_TYPE:
871 case PGM_STACK_OPERATION:
872 case PGM_TRACE_TABEL:
873 case PGM_CRYPTO_OPERATION:
874 nullifying = true;
875 break;
8712836b
DH		 876 }
877
383d0b05
JF		 878 if (pgm_info.code & PGM_PER) {
879 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 880 (u8 *) __LC_PER_CODE);
383d0b05 881 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 882 (u8 *)__LC_PER_ATMID);
383d0b05 883 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 884 (u64 *) __LC_PER_ADDRESS);
383d0b05 885 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 886 (u8 *) __LC_PER_ACCESS_ID);
887 }
888
eaa4f416 889 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND))
0e8bc06a 890 kvm_s390_rewind_psw(vcpu, ilen);
a9a846fd 891
0e8bc06a
DH		 892 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
893 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
2ba45968
DH		 894 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
895 (u64 *) __LC_LAST_BREAK);
383d0b05 896 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 897 (u16 *)__LC_PGM_INT_CODE);
898 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
899 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
900 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
901 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 902 return rc ? -EFAULT : 0;
0fb97abe
JF		 903}
904
6d3da241 905static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
0fb97abe 906{
6d3da241
JF		 907 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
908 struct kvm_s390_ext_info ext;
909 int rc = 0;
910
911 spin_lock(&fi->lock);
912 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
913 spin_unlock(&fi->lock);
914 return 0;
915 }
916 ext = fi->srv_signal;
917 memset(&fi->srv_signal, 0, sizeof(ext));
918 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
919 spin_unlock(&fi->lock);
0fb97abe 920
3f24ba15 921 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
6d3da241 922 ext.ext_params);
0fb97abe 923 vcpu->stat.deliver_service_signal++;
6d3da241
JF		 924 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
925 ext.ext_params, 0);
0fb97abe
JF		 926
927 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 928 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 929 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
930 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
931 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
932 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
6d3da241 933 rc |= put_guest_lc(vcpu, ext.ext_params,
0fb97abe 934 (u32 *)__LC_EXT_PARAMS);
6d3da241 935
99e20009 936 return rc ? -EFAULT : 0;
0fb97abe
JF		 937}
938
6d3da241 939static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
0fb97abe 940{
6d3da241
JF		 941 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
942 struct kvm_s390_interrupt_info *inti;
943 int rc = 0;
0fb97abe 944
6d3da241
JF		 945 spin_lock(&fi->lock);
946 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
947 struct kvm_s390_interrupt_info,
948 list);
949 if (inti) {
6d3da241
JF		 950 list_del(&inti->list);
951 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
952 }
953 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
954 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
955 spin_unlock(&fi->lock);
8712836b 956
6d3da241 957 if (inti) {
3f24ba15
CB		 958 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
959 KVM_S390_INT_PFAULT_DONE, 0,
960 inti->ext.ext_params2);
961 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
962 inti->ext.ext_params2);
963
6d3da241
JF		 964 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
965 (u16 *)__LC_EXT_INT_CODE);
966 rc |= put_guest_lc(vcpu, PFAULT_DONE,
967 (u16 *)__LC_EXT_CPU_ADDR);
968 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
969 &vcpu->arch.sie_block->gpsw,
970 sizeof(psw_t));
971 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
972 &vcpu->arch.sie_block->gpsw,
973 sizeof(psw_t));
974 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
975 (u64 *)__LC_EXT_PARAMS2);
976 kfree(inti);
977 }
99e20009 978 return rc ? -EFAULT : 0;
0fb97abe
JF		 979}
980
6d3da241 981static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
0fb97abe 982{
6d3da241
JF		 983 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
984 struct kvm_s390_interrupt_info *inti;
985 int rc = 0;
0fb97abe 986
6d3da241
JF		 987 spin_lock(&fi->lock);
988 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
989 struct kvm_s390_interrupt_info,
990 list);
991 if (inti) {
992 VCPU_EVENT(vcpu, 4,
3f24ba15 993 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
6d3da241 994 inti->ext.ext_params, inti->ext.ext_params2);
ccc40c53 995 vcpu->stat.deliver_virtio++;
6d3da241
JF		 996 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
997 inti->type,
998 inti->ext.ext_params,
999 inti->ext.ext_params2);
1000 list_del(&inti->list);
1001 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
1002 }
1003 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
1004 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1005 spin_unlock(&fi->lock);
0fb97abe 1006
6d3da241
JF		 1007 if (inti) {
1008 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
1009 (u16 *)__LC_EXT_INT_CODE);
1010 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
1011 (u16 *)__LC_EXT_CPU_ADDR);
1012 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
1013 &vcpu->arch.sie_block->gpsw,
1014 sizeof(psw_t));
1015 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
1016 &vcpu->arch.sie_block->gpsw,
1017 sizeof(psw_t));
1018 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
1019 (u32 *)__LC_EXT_PARAMS);
1020 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
1021 (u64 *)__LC_EXT_PARAMS2);
1022 kfree(inti);
1023 }
99e20009 1024 return rc ? -EFAULT : 0;
0fb97abe
JF		 1025}
1026
d7c5cb01
MM		 1027static int __do_deliver_io(struct kvm_vcpu *vcpu, struct kvm_s390_io_info *io)
1028{
1029 int rc;
1030
1031 rc = put_guest_lc(vcpu, io->subchannel_id, (u16 *)__LC_SUBCHANNEL_ID);
1032 rc |= put_guest_lc(vcpu, io->subchannel_nr, (u16 *)__LC_SUBCHANNEL_NR);
1033 rc |= put_guest_lc(vcpu, io->io_int_parm, (u32 *)__LC_IO_INT_PARM);
1034 rc |= put_guest_lc(vcpu, io->io_int_word, (u32 *)__LC_IO_INT_WORD);
1035 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
1036 &vcpu->arch.sie_block->gpsw,
1037 sizeof(psw_t));
1038 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
1039 &vcpu->arch.sie_block->gpsw,
1040 sizeof(psw_t));
1041 return rc ? -EFAULT : 0;
1042}
1043
0fb97abe 1044static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
6d3da241 1045 unsigned long irq_type)
0fb97abe 1046{
6d3da241
JF		 1047 struct list_head *isc_list;
1048 struct kvm_s390_float_interrupt *fi;
982cff42 1049 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
6d3da241 1050 struct kvm_s390_interrupt_info *inti = NULL;
d7c5cb01
MM		 1051 struct kvm_s390_io_info io;
1052 u32 isc;
6d3da241 1053 int rc = 0;
0fb97abe 1054
6d3da241 1055 fi = &vcpu->kvm->arch.float_int;
8712836b 1056
6d3da241 1057 spin_lock(&fi->lock);
d7c5cb01
MM		 1058 isc = irq_type_to_isc(irq_type);
1059 isc_list = &fi->lists[isc];
6d3da241
JF		 1060 inti = list_first_entry_or_null(isc_list,
1061 struct kvm_s390_interrupt_info,
1062 list);
1063 if (inti) {
dcc98ea6
CB		 1064 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1065 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)");
1066 else
1067 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x",
1068 inti->io.subchannel_id >> 8,
1069 inti->io.subchannel_id >> 1 & 0x3,
1070 inti->io.subchannel_nr);
1071
ccc40c53 1072 vcpu->stat.deliver_io++;
6d3da241
JF		 1073 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1074 inti->type,
1075 ((__u32)inti->io.subchannel_id << 16) |
1076 inti->io.subchannel_nr,
1077 ((__u64)inti->io.io_int_parm << 32) |
1078 inti->io.io_int_word);
1079 list_del(&inti->list);
1080 fi->counters[FIRQ_CNTR_IO] -= 1;
1081 }
1082 if (list_empty(isc_list))
1083 clear_bit(irq_type, &fi->pending_irqs);
1084 spin_unlock(&fi->lock);
1085
1086 if (inti) {
d7c5cb01 1087 rc = __do_deliver_io(vcpu, &(inti->io));
6d3da241 1088 kfree(inti);
d7c5cb01 1089 goto out;
6d3da241 1090 }
383d0b05 1091
982cff42 1092 if (gi->origin && gisa_tac_ipm_gisc(gi->origin, isc)) {
d7c5cb01
MM		 1093 /*
1094 * in case an adapter interrupt was not delivered
1095 * in SIE context KVM will handle the delivery
1096 */
1097 VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc);
1098 memset(&io, 0, sizeof(io));
2496c8e7 1099 io.io_int_word = isc_to_int_word(isc);
ccc40c53 1100 vcpu->stat.deliver_io++;
d7c5cb01
MM		 1101 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1102 KVM_S390_INT_IO(1, 0, 0, 0),
1103 ((__u32)io.subchannel_id << 16) |
1104 io.subchannel_nr,
1105 ((__u64)io.io_int_parm << 32) |
1106 io.io_int_word);
1107 rc = __do_deliver_io(vcpu, &io);
1108 }
1109out:
1110 return rc;
383d0b05
JF		 1111}
1112
ea5f4969
DH		 1113/* Check whether an external call is pending (deliverable or not) */
1114int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 1115{
ea5f4969 1116 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
4953919f 1117
37c5f6c8 1118 if (!sclp.has_sigpif)
ea5f4969 1119 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 1120
a5bd7647 1121 return sca_ext_call_pending(vcpu, NULL);
4953919f
DH		 1122}
1123
9a022067 1124int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 1125{
4d32ad6b
DH		 1126 if (deliverable_irqs(vcpu))
1127 return 1;
ba5c1e9b 1128
4d32ad6b
DH		 1129 if (kvm_cpu_has_pending_timer(vcpu))
1130 return 1;
ba5c1e9b 1131
ea5f4969 1132 /* external call pending and deliverable */
4d32ad6b 1133 if (kvm_s390_ext_call_pending(vcpu) &&
ea5f4969 1134 !psw_extint_disabled(vcpu) &&
b9224cd7 1135 (vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK))
4d32ad6b 1136 return 1;
4953919f 1137
4d32ad6b
DH		 1138 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
1139 return 1;
1140 return 0;
ba5c1e9b
CO		 1141}
1142
3d80840d
MT		 1143int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1144{
b4aec925 1145 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
3d80840d
MT		 1146}
1147
b3c17f10
DH		 1148static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
1149{
5fe01793
DH		 1150 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
1151 const u64 ckc = vcpu->arch.sie_block->ckc;
1152 u64 cputm, sltime = 0;
b3c17f10
DH		 1153
1154 if (ckc_interrupts_enabled(vcpu)) {
b9224cd7 1155 if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) {
5fe01793
DH		 1156 if ((s64)now < (s64)ckc)
1157 sltime = tod_to_ns((s64)ckc - (s64)now);
1158 } else if (now < ckc) {
1159 sltime = tod_to_ns(ckc - now);
1160 }
1161 /* already expired */
1162 if (!sltime)
b3c17f10
DH		 1163 return 0;
1164 if (cpu_timer_interrupts_enabled(vcpu)) {
1165 cputm = kvm_s390_get_cpu_timer(vcpu);
1166 /* already expired? */
1167 if (cputm >> 63)
1168 return 0;
1169 return min(sltime, tod_to_ns(cputm));
1170 }
1171 } else if (cpu_timer_interrupts_enabled(vcpu)) {
1172 sltime = kvm_s390_get_cpu_timer(vcpu);
1173 /* already expired? */
1174 if (sltime >> 63)
1175 return 0;
1176 }
1177 return sltime;
1178}
1179
ba5c1e9b
CO		 1180int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
1181{
9f30f621 1182 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
b3c17f10 1183 u64 sltime;
ba5c1e9b
CO		 1184
1185 vcpu->stat.exit_wait_state++;
ba5c1e9b 1186
0759d068 1187 /* fast path */
118b862b 1188 if (kvm_arch_vcpu_runnable(vcpu))
0759d068 1189 return 0;
e52b2af5 1190
ba5c1e9b
CO		 1191 if (psw_interrupts_disabled(vcpu)) {
1192 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 1193 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 1194 }
1195
9f30f621
MM		 1196 if (gi->origin &&
1197 (gisa_get_ipm_or_restore_iam(gi) &
1198 vcpu->arch.sie_block->gcr[6] >> 24))
1199 return 0;
1200
b3c17f10
DH		 1201 if (!ckc_interrupts_enabled(vcpu) &&
1202 !cpu_timer_interrupts_enabled(vcpu)) {
ba5c1e9b 1203 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 1204 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 1205 goto no_timer;
1206 }
1207
b3c17f10
DH		 1208 sltime = __calculate_sltime(vcpu);
1209 if (!sltime)
bda343ef
DH		 1210 return 0;
1211
1212 __set_cpu_idle(vcpu);
8b0e1953 1213 hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL);
b3c17f10 1214 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
ba5c1e9b 1215no_timer:
800c1065 1216 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 1217 kvm_vcpu_block(vcpu);
ba5c1e9b 1218 __unset_cpu_idle(vcpu);
800c1065
TH		 1219 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1220
2d00f759 1221 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 1222 return 0;
1223}
1224
0e9c85a5
DH		 1225void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
1226{
3491caf2 1227 vcpu->valid_wakeup = true;
d9847409
WL		 1228 kvm_vcpu_wake_up(vcpu);
1229
72e1ad42 1230 /*
d9847409 1231 * The VCPU might not be sleeping but rather executing VSIE. Let's
adbf1698
DH		 1232 * kick it, so it leaves the SIE to process the request.
1233 */
1234 kvm_s390_vsie_kick(vcpu);
0e9c85a5
DH		 1235}
1236
ca872302
CB		 1237enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
1238{
1239 struct kvm_vcpu *vcpu;
b3c17f10 1240 u64 sltime;
ca872302
CB		 1241
1242 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
b3c17f10 1243 sltime = __calculate_sltime(vcpu);
ca872302 1244
2d00f759
DH		 1245 /*
1246 * If the monotonic clock runs faster than the tod clock we might be
1247 * woken up too early and have to go back to sleep to avoid deadlocks.
1248 */
b3c17f10 1249 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime)))
2d00f759
DH		 1250 return HRTIMER_RESTART;
1251 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 1252 return HRTIMER_NORESTART;
1253}
ba5c1e9b 1254
2ed10cc1
JF		 1255void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
1256{
1257 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 1258
4ae3c081 1259 spin_lock(&li->lock);
383d0b05
JF		 1260 li->pending_irqs = 0;
1261 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
1262 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 1263 spin_unlock(&li->lock);
4953919f 1264
a5bd7647 1265 sca_clear_ext_call(vcpu);
2ed10cc1
JF		 1266}
1267
614aeab4 1268int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 1269{
180c12fb 1270 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
79395031 1271 int rc = 0;
383d0b05 1272 unsigned long irq_type;
6d3da241 1273 unsigned long irqs;
ba5c1e9b
CO		 1274
1275 __reset_intercept_indicators(vcpu);
ba5c1e9b 1276
383d0b05
JF		 1277 /* pending ckc conditions might have been invalidated */
1278 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
b4aec925 1279 if (ckc_irq_pending(vcpu))
383d0b05
JF		 1280 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1281
b4aec925
DH		 1282 /* pending cpu timer conditions might have been invalidated */
1283 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1284 if (cpu_timer_irq_pending(vcpu))
1285 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1286
ffeca0ae 1287 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
c7901a6e
MM		 1288 /* bits are in the reverse order of interrupt priority */
1289 irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT);
baabee67
DH		 1290 switch (irq_type) {
1291 case IRQ_PEND_IO_ISC_0:
1292 case IRQ_PEND_IO_ISC_1:
1293 case IRQ_PEND_IO_ISC_2:
1294 case IRQ_PEND_IO_ISC_3:
1295 case IRQ_PEND_IO_ISC_4:
1296 case IRQ_PEND_IO_ISC_5:
1297 case IRQ_PEND_IO_ISC_6:
1298 case IRQ_PEND_IO_ISC_7:
6d3da241 1299 rc = __deliver_io(vcpu, irq_type);
baabee67
DH		 1300 break;
1301 case IRQ_PEND_MCHK_EX:
1302 case IRQ_PEND_MCHK_REP:
1303 rc = __deliver_machine_check(vcpu);
1304 break;
1305 case IRQ_PEND_PROG:
1306 rc = __deliver_prog(vcpu);
1307 break;
1308 case IRQ_PEND_EXT_EMERGENCY:
1309 rc = __deliver_emergency_signal(vcpu);
1310 break;
1311 case IRQ_PEND_EXT_EXTERNAL:
1312 rc = __deliver_external_call(vcpu);
1313 break;
1314 case IRQ_PEND_EXT_CLOCK_COMP:
1315 rc = __deliver_ckc(vcpu);
1316 break;
1317 case IRQ_PEND_EXT_CPU_TIMER:
1318 rc = __deliver_cpu_timer(vcpu);
1319 break;
1320 case IRQ_PEND_RESTART:
1321 rc = __deliver_restart(vcpu);
1322 break;
1323 case IRQ_PEND_SET_PREFIX:
1324 rc = __deliver_set_prefix(vcpu);
1325 break;
1326 case IRQ_PEND_PFAULT_INIT:
1327 rc = __deliver_pfault_init(vcpu);
1328 break;
1329 case IRQ_PEND_EXT_SERVICE:
1330 rc = __deliver_service(vcpu);
1331 break;
1332 case IRQ_PEND_PFAULT_DONE:
1333 rc = __deliver_pfault_done(vcpu);
1334 break;
1335 case IRQ_PEND_VIRTIO:
1336 rc = __deliver_virtio(vcpu);
1337 break;
1338 default:
1339 WARN_ONCE(1, "Unknown pending irq type %ld", irq_type);
1340 clear_bit(irq_type, &li->pending_irqs);
383d0b05 1341 }
ffeca0ae 1342 }
383d0b05 1343
6d3da241 1344 set_intercept_indicators(vcpu);
79395031
JF		 1345
1346 return rc;
ba5c1e9b
CO		 1347}
1348
383d0b05 1349static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1350{
1351 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1352
ccc40c53 1353 vcpu->stat.inject_program++;
ed2afcfa
DH		 1354 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1355 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1356 irq->u.pgm.code, 0);
1357
634790b8
DH		 1358 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) {
1359 /* auto detection if no valid ILC was given */
1360 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK;
1361 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu);
1362 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID;
1363 }
1364
238293b1
DH		 1365 if (irq->u.pgm.code == PGM_PER) {
1366 li->irq.pgm.code |= PGM_PER;
634790b8 1367 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1368 /* only modify PER related information */
1369 li->irq.pgm.per_address = irq->u.pgm.per_address;
1370 li->irq.pgm.per_code = irq->u.pgm.per_code;
1371 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1372 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1373 } else if (!(irq->u.pgm.code & PGM_PER)) {
1374 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1375 irq->u.pgm.code;
634790b8 1376 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1377 /* only modify non-PER information */
1378 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1379 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1380 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1381 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1382 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1383 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1384 } else {
1385 li->irq.pgm = irq->u.pgm;
1386 }
9185124e 1387 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 1388 return 0;
1389}
1390
383d0b05 1391static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1392{
1393 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1394
ccc40c53 1395 vcpu->stat.inject_pfault_init++;
3f24ba15
CB		 1396 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1397 irq->u.ext.ext_params2);
383d0b05
JF		 1398 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1399 irq->u.ext.ext_params,
ed2afcfa 1400 irq->u.ext.ext_params2);
383d0b05
JF		 1401
1402 li->irq.ext = irq->u.ext;
1403 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
2018224d 1404 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1405 return 0;
1406}
1407
0675d92d 1408static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1409{
1410 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1411 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1412 uint16_t src_id = irq->u.extcall.code;
0146a7b0 1413
ccc40c53 1414 vcpu->stat.inject_external_call++;
3f24ba15 1415 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
ea5f4969 1416 src_id);
383d0b05 1417 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ed2afcfa 1418 src_id, 0);
ea5f4969
DH		 1419
1420 /* sending vcpu invalid */
152e9f65 1421 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
ea5f4969
DH		 1422 return -EINVAL;
1423
37c5f6c8 1424 if (sclp.has_sigpif)
a5bd7647 1425 return sca_inject_ext_call(vcpu, src_id);
383d0b05 1426
b938eace 1427 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
ea5f4969 1428 return -EBUSY;
383d0b05 1429 *extcall = irq->u.extcall;
2018224d 1430 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1431 return 0;
1432}
1433
383d0b05 1434static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1435{
1436 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1437 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0 1438
ccc40c53 1439 vcpu->stat.inject_set_prefix++;
ed2afcfa 1440 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
556cc0da 1441 irq->u.prefix.address);
383d0b05 1442 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
ed2afcfa 1443 irq->u.prefix.address, 0);
383d0b05 1444
a3a9c59a
DH		 1445 if (!is_vcpu_stopped(vcpu))
1446 return -EBUSY;
1447
383d0b05
JF		 1448 *prefix = irq->u.prefix;
1449 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1450 return 0;
1451}
1452
6cddd432 1453#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1454static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1455{
1456 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1457 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1458 int rc = 0;
0146a7b0 1459
ccc40c53 1460 vcpu->stat.inject_stop_signal++;
ed2afcfa 1461 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
383d0b05 1462
2822545f
DH		 1463 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1464 return -EINVAL;
1465
6cddd432
DH		 1466 if (is_vcpu_stopped(vcpu)) {
1467 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1468 rc = kvm_s390_store_status_unloaded(vcpu,
1469 KVM_S390_STORE_STATUS_NOADDR);
1470 return rc;
1471 }
1472
1473 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1474 return -EBUSY;
2822545f 1475 stop->flags = irq->u.stop.flags;
2018224d 1476 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1477 return 0;
1478}
1479
1480static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1481 struct kvm_s390_irq *irq)
0146a7b0
JF		 1482{
1483 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1484
ccc40c53 1485 vcpu->stat.inject_restart++;
3f24ba15 1486 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
ed2afcfa 1487 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
383d0b05
JF		 1488
1489 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1490 return 0;
1491}
1492
1493static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1494 struct kvm_s390_irq *irq)
0146a7b0
JF		 1495{
1496 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1497
ccc40c53 1498 vcpu->stat.inject_emergency_signal++;
3f24ba15 1499 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
383d0b05
JF		 1500 irq->u.emerg.code);
1501 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
ed2afcfa 1502 irq->u.emerg.code, 0);
383d0b05 1503
b85de33a
DH		 1504 /* sending vcpu invalid */
1505 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1506 return -EINVAL;
1507
49538d12 1508 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1509 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
2018224d 1510 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1511 return 0;
1512}
1513
383d0b05 1514static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1515{
1516 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1517 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0 1518
ccc40c53 1519 vcpu->stat.inject_mchk++;
3f24ba15 1520 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
556cc0da 1521 irq->u.mchk.mcic);
383d0b05 1522 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
ed2afcfa 1523 irq->u.mchk.mcic);
383d0b05
JF		 1524
1525 /*
fc2020cf
JF		 1526 * Because repressible machine checks can be indicated along with
1527 * exigent machine checks (PoP, Chapter 11, Interruption action)
1528 * we need to combine cr14, mcic and external damage code.
1529 * Failing storage address and the logout area should not be or'ed
1530 * together, we just indicate the last occurrence of the corresponding
1531 * machine check
383d0b05 1532 */
fc2020cf 1533 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1534 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1535 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1536 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1537 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1538 sizeof(mchk->fixed_logout));
383d0b05
JF		 1539 if (mchk->mcic & MCHK_EX_MASK)
1540 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1541 else if (mchk->mcic & MCHK_REP_MASK)
1542 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1543 return 0;
1544}
1545
383d0b05 1546static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1547{
1548 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1549
ccc40c53 1550 vcpu->stat.inject_ckc++;
3f24ba15 1551 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
383d0b05 1552 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
ed2afcfa 1553 0, 0);
383d0b05
JF		 1554
1555 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
2018224d 1556 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1557 return 0;
1558}
1559
383d0b05 1560static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1561{
1562 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1563
ccc40c53 1564 vcpu->stat.inject_cputm++;
3f24ba15 1565 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
383d0b05 1566 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
ed2afcfa 1567 0, 0);
383d0b05
JF		 1568
1569 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
2018224d 1570 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
ba5c1e9b
CO		 1571 return 0;
1572}
1573
6d3da241
JF		 1574static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1575 int isc, u32 schid)
1576{
1577 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1578 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1579 struct kvm_s390_interrupt_info *iter;
1580 u16 id = (schid & 0xffff0000U) >> 16;
1581 u16 nr = schid & 0x0000ffffU;
1582
1583 spin_lock(&fi->lock);
1584 list_for_each_entry(iter, isc_list, list) {
1585 if (schid && (id != iter->io.subchannel_id ||
1586 nr != iter->io.subchannel_nr))
1587 continue;
1588 /* found an appropriate entry */
1589 list_del_init(&iter->list);
1590 fi->counters[FIRQ_CNTR_IO] -= 1;
1591 if (list_empty(isc_list))
ee739f4b 1592 clear_bit(isc_to_irq_type(isc), &fi->pending_irqs);
6d3da241
JF		 1593 spin_unlock(&fi->lock);
1594 return iter;
1595 }
1596 spin_unlock(&fi->lock);
1597 return NULL;
1598}
383d0b05 1599
4b35f65e
MM		 1600static struct kvm_s390_interrupt_info *get_top_io_int(struct kvm *kvm,
1601 u64 isc_mask, u32 schid)
1602{
1603 struct kvm_s390_interrupt_info *inti = NULL;
1604 int isc;
1605
1606 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1607 if (isc_mask & isc_to_isc_bits(isc))
1608 inti = get_io_int(kvm, isc, schid);
1609 }
1610 return inti;
1611}
1612
1613static int get_top_gisa_isc(struct kvm *kvm, u64 isc_mask, u32 schid)
1614{
982cff42 1615 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
4b35f65e
MM		 1616 unsigned long active_mask;
1617 int isc;
1618
1619 if (schid)
1620 goto out;
982cff42 1621 if (!gi->origin)
4b35f65e
MM		 1622 goto out;
1623
982cff42 1624 active_mask = (isc_mask & gisa_get_ipm(gi->origin) << 24) << 32;
4b35f65e
MM		 1625 while (active_mask) {
1626 isc = __fls(active_mask) ^ (BITS_PER_LONG - 1);
982cff42 1627 if (gisa_tac_ipm_gisc(gi->origin, isc))
4b35f65e
MM		 1628 return isc;
1629 clear_bit_inv(isc, &active_mask);
1630 }
1631out:
1632 return -EINVAL;
1633}
1634
6d3da241
JF		 1635/*
1636 * Dequeue and return an I/O interrupt matching any of the interruption
1637 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
4b35f65e
MM		 1638 * Take into account the interrupts pending in the interrupt list and in GISA.
1639 *
1640 * Note that for a guest that does not enable I/O interrupts
1641 * but relies on TPI, a flood of classic interrupts may starve
1642 * out adapter interrupts on the same isc. Linux does not do
1643 * that, and it is possible to work around the issue by configuring
1644 * different iscs for classic and adapter interrupts in the guest,
1645 * but we may want to revisit this in the future.
6d3da241 1646 */
fa6b7fe9 1647struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241
JF		 1648 u64 isc_mask, u32 schid)
1649{
982cff42 1650 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
4b35f65e 1651 struct kvm_s390_interrupt_info *inti, *tmp_inti;
6d3da241
JF		 1652 int isc;
1653
4b35f65e
MM		 1654 inti = get_top_io_int(kvm, isc_mask, schid);
1655
1656 isc = get_top_gisa_isc(kvm, isc_mask, schid);
1657 if (isc < 0)
1658 /* no AI in GISA */
1659 goto out;
1660
1661 if (!inti)
1662 /* AI in GISA but no classical IO int */
1663 goto gisa_out;
1664
1665 /* both types of interrupts present */
1666 if (int_word_to_isc(inti->io.io_int_word) <= isc) {
1667 /* classical IO int with higher priority */
982cff42 1668 gisa_set_ipm_gisc(gi->origin, isc);
4b35f65e 1669 goto out;
6d3da241 1670 }
4b35f65e
MM		 1671gisa_out:
1672 tmp_inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1673 if (tmp_inti) {
1674 tmp_inti->type = KVM_S390_INT_IO(1, 0, 0, 0);
1675 tmp_inti->io.io_int_word = isc_to_int_word(isc);
1676 if (inti)
1677 kvm_s390_reinject_io_int(kvm, inti);
1678 inti = tmp_inti;
1679 } else
982cff42 1680 gisa_set_ipm_gisc(gi->origin, isc);
4b35f65e 1681out:
6d3da241
JF		 1682 return inti;
1683}
1684
1685#define SCCB_MASK 0xFFFFFFF8
1686#define SCCB_EVENT_PENDING 0x3
1687
1688static int __inject_service(struct kvm *kvm,
1689 struct kvm_s390_interrupt_info *inti)
1690{
1691 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1692
ccc40c53 1693 kvm->stat.inject_service_signal++;
6d3da241
JF		 1694 spin_lock(&fi->lock);
1695 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1696 /*
1697 * Early versions of the QEMU s390 bios will inject several
1698 * service interrupts after another without handling a
1699 * condition code indicating busy.
1700 * We will silently ignore those superfluous sccb values.
1701 * A future version of QEMU will take care of serialization
1702 * of servc requests
1703 */
1704 if (fi->srv_signal.ext_params & SCCB_MASK)
1705 goto out;
1706 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1707 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1708out:
1709 spin_unlock(&fi->lock);
1710 kfree(inti);
1711 return 0;
1712}
1713
1714static int __inject_virtio(struct kvm *kvm,
1715 struct kvm_s390_interrupt_info *inti)
1716{
1717 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1718
ccc40c53 1719 kvm->stat.inject_virtio++;
6d3da241
JF		 1720 spin_lock(&fi->lock);
1721 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1722 spin_unlock(&fi->lock);
1723 return -EBUSY;
1724 }
1725 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1726 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1727 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1728 spin_unlock(&fi->lock);
1729 return 0;
1730}
1731
1732static int __inject_pfault_done(struct kvm *kvm,
1733 struct kvm_s390_interrupt_info *inti)
1734{
1735 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1736
ccc40c53 1737 kvm->stat.inject_pfault_done++;
6d3da241
JF		 1738 spin_lock(&fi->lock);
1739 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1740 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1741 spin_unlock(&fi->lock);
1742 return -EBUSY;
1743 }
1744 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1745 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1746 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1747 spin_unlock(&fi->lock);
1748 return 0;
1749}
1750
1751#define CR_PENDING_SUBCLASS 28
1752static int __inject_float_mchk(struct kvm *kvm,
1753 struct kvm_s390_interrupt_info *inti)
1754{
1755 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1756
ccc40c53 1757 kvm->stat.inject_float_mchk++;
6d3da241
JF		 1758 spin_lock(&fi->lock);
1759 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1760 fi->mchk.mcic |= inti->mchk.mcic;
1761 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1762 spin_unlock(&fi->lock);
1763 kfree(inti);
1764 return 0;
1765}
1766
1767static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
fa6b7fe9 1768{
982cff42 1769 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
fa6b7fe9 1770 struct kvm_s390_float_interrupt *fi;
6d3da241
JF		 1771 struct list_head *list;
1772 int isc;
fa6b7fe9 1773
ccc40c53 1774 kvm->stat.inject_io++;
d7c5cb01
MM		 1775 isc = int_word_to_isc(inti->io.io_int_word);
1776
982cff42 1777 if (gi->origin && inti->type & KVM_S390_INT_IO_AI_MASK) {
d7c5cb01 1778 VM_EVENT(kvm, 4, "%s isc %1u", "inject: I/O (AI/gisa)", isc);
982cff42 1779 gisa_set_ipm_gisc(gi->origin, isc);
d7c5cb01
MM		 1780 kfree(inti);
1781 return 0;
1782 }
1783
fa6b7fe9
CH		 1784 fi = &kvm->arch.float_int;
1785 spin_lock(&fi->lock);
6d3da241
JF		 1786 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1787 spin_unlock(&fi->lock);
1788 return -EBUSY;
a91b8ebe 1789 }
6d3da241
JF		 1790 fi->counters[FIRQ_CNTR_IO] += 1;
1791
dcc98ea6
CB		 1792 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1793 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)");
1794 else
1795 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x",
1796 inti->io.subchannel_id >> 8,
1797 inti->io.subchannel_id >> 1 & 0x3,
1798 inti->io.subchannel_nr);
6d3da241
JF		 1799 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1800 list_add_tail(&inti->list, list);
ee739f4b 1801 set_bit(isc_to_irq_type(isc), &fi->pending_irqs);
fa6b7fe9 1802 spin_unlock(&fi->lock);
6d3da241 1803 return 0;
fa6b7fe9 1804}
ba5c1e9b 1805
96e0ed23
DH		 1806/*
1807 * Find a destination VCPU for a floating irq and kick it.
1808 */
1809static void __floating_irq_kick(struct kvm *kvm, u64 type)
ba5c1e9b 1810{
96e0ed23
DH		 1811 struct kvm_vcpu *dst_vcpu;
1812 int sigcpu, online_vcpus, nr_tries = 0;
1813
1814 online_vcpus = atomic_read(&kvm->online_vcpus);
1815 if (!online_vcpus)
1816 return;
1817
1818 /* find idle VCPUs first, then round robin */
246b7218 1819 sigcpu = find_first_bit(kvm->arch.idle_mask, online_vcpus);
96e0ed23
DH		 1820 if (sigcpu == online_vcpus) {
1821 do {
246b7218
MM		 1822 sigcpu = kvm->arch.float_int.next_rr_cpu++;
1823 kvm->arch.float_int.next_rr_cpu %= online_vcpus;
96e0ed23
DH		 1824 /* avoid endless loops if all vcpus are stopped */
1825 if (nr_tries++ >= online_vcpus)
1826 return;
1827 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1828 }
1829 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1830
1831 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
96e0ed23
DH		 1832 switch (type) {
1833 case KVM_S390_MCHK:
2018224d 1834 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT);
96e0ed23
DH		 1835 break;
1836 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
982cff42
MM		 1837 if (!(type & KVM_S390_INT_IO_AI_MASK &&
1838 kvm->arch.gisa_int.origin))
a9810327 1839 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT);
96e0ed23
DH		 1840 break;
1841 default:
2018224d 1842 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT);
96e0ed23
DH		 1843 break;
1844 }
96e0ed23
DH		 1845 kvm_s390_vcpu_wakeup(dst_vcpu);
1846}
1847
1848static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1849{
6d3da241
JF		 1850 u64 type = READ_ONCE(inti->type);
1851 int rc;
ba5c1e9b 1852
6d3da241
JF		 1853 switch (type) {
1854 case KVM_S390_MCHK:
1855 rc = __inject_float_mchk(kvm, inti);
1856 break;
1857 case KVM_S390_INT_VIRTIO:
1858 rc = __inject_virtio(kvm, inti);
1859 break;
1860 case KVM_S390_INT_SERVICE:
1861 rc = __inject_service(kvm, inti);
1862 break;
1863 case KVM_S390_INT_PFAULT_DONE:
1864 rc = __inject_pfault_done(kvm, inti);
1865 break;
1866 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1867 rc = __inject_io(kvm, inti);
1868 break;
1869 default:
a91b8ebe 1870 rc = -EINVAL;
c05c4186 1871 }
6d3da241
JF		 1872 if (rc)
1873 return rc;
1874
96e0ed23 1875 __floating_irq_kick(kvm, type);
6d3da241 1876 return 0;
c05c4186
JF		 1877}
1878
1879int kvm_s390_inject_vm(struct kvm *kvm,
1880 struct kvm_s390_interrupt *s390int)
1881{
1882 struct kvm_s390_interrupt_info *inti;
428d53be 1883 int rc;
c05c4186 1884
ba5c1e9b
CO		 1885 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1886 if (!inti)
1887 return -ENOMEM;
1888
c05c4186
JF		 1889 inti->type = s390int->type;
1890 switch (inti->type) {
ba5c1e9b 1891 case KVM_S390_INT_VIRTIO:
33e19115 1892 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1893 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1894 inti->ext.ext_params = s390int->parm;
1895 inti->ext.ext_params2 = s390int->parm64;
1896 break;
1897 case KVM_S390_INT_SERVICE:
3f24ba15 1898 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1899 inti->ext.ext_params = s390int->parm;
1900 break;
3c038e6b 1901 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 1902 inti->ext.ext_params2 = s390int->parm64;
1903 break;
48a3e950 1904 case KVM_S390_MCHK:
3f24ba15 1905 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
48a3e950 1906 s390int->parm64);
48a3e950
CH		 1907 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1908 inti->mchk.mcic = s390int->parm64;
1909 break;
d8346b7d 1910 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
d8346b7d
CH		 1911 inti->io.subchannel_id = s390int->parm >> 16;
1912 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1913 inti->io.io_int_parm = s390int->parm64 >> 32;
1914 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1915 break;
ba5c1e9b
CO		 1916 default:
1917 kfree(inti);
1918 return -EINVAL;
1919 }
ade38c31
CH		 1920 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1921 2);
ba5c1e9b 1922
428d53be
DH		 1923 rc = __inject_vm(kvm, inti);
1924 if (rc)
1925 kfree(inti);
1926 return rc;
ba5c1e9b
CO		 1927}
1928
15462e37 1929int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 1930 struct kvm_s390_interrupt_info *inti)
1931{
15462e37 1932 return __inject_vm(kvm, inti);
2f32d4ea
CH		 1933}
1934
383d0b05
JF		 1935int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1936 struct kvm_s390_irq *irq)
1937{
1938 irq->type = s390int->type;
1939 switch (irq->type) {
1940 case KVM_S390_PROGRAM_INT:
1941 if (s390int->parm & 0xffff0000)
1942 return -EINVAL;
1943 irq->u.pgm.code = s390int->parm;
1944 break;
1945 case KVM_S390_SIGP_SET_PREFIX:
1946 irq->u.prefix.address = s390int->parm;
1947 break;
2822545f
DH		 1948 case KVM_S390_SIGP_STOP:
1949 irq->u.stop.flags = s390int->parm;
1950 break;
383d0b05 1951 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 1952 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1953 return -EINVAL;
1954 irq->u.extcall.code = s390int->parm;
1955 break;
1956 case KVM_S390_INT_EMERGENCY:
94d1f564 1957 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1958 return -EINVAL;
1959 irq->u.emerg.code = s390int->parm;
1960 break;
1961 case KVM_S390_MCHK:
1962 irq->u.mchk.mcic = s390int->parm64;
1963 break;
1964 }
1965 return 0;
1966}
1967
6cddd432
DH		 1968int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1969{
1970 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1971
1972 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1973}
1974
1975void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1976{
1977 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1978
1979 spin_lock(&li->lock);
1980 li->irq.stop.flags = 0;
1981 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1982 spin_unlock(&li->lock);
1983}
1984
79e87a10 1985static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 1986{
0146a7b0 1987 int rc;
ba5c1e9b 1988
383d0b05 1989 switch (irq->type) {
ba5c1e9b 1990 case KVM_S390_PROGRAM_INT:
383d0b05 1991 rc = __inject_prog(vcpu, irq);
ba5c1e9b 1992 break;
b7e6e4d3 1993 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 1994 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 1995 break;
ba5c1e9b 1996 case KVM_S390_SIGP_STOP:
383d0b05 1997 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 1998 break;
ba5c1e9b 1999 case KVM_S390_RESTART:
383d0b05 2000 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 2001 break;
e029ae5b 2002 case KVM_S390_INT_CLOCK_COMP:
383d0b05 2003 rc = __inject_ckc(vcpu);
0146a7b0 2004 break;
e029ae5b 2005 case KVM_S390_INT_CPU_TIMER:
383d0b05 2006 rc = __inject_cpu_timer(vcpu);
82a12737 2007 break;
7697e71f 2008 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 2009 rc = __inject_extcall(vcpu, irq);
82a12737 2010 break;
ba5c1e9b 2011 case KVM_S390_INT_EMERGENCY:
383d0b05 2012 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 2013 break;
48a3e950 2014 case KVM_S390_MCHK:
383d0b05 2015 rc = __inject_mchk(vcpu, irq);
48a3e950 2016 break;
3c038e6b 2017 case KVM_S390_INT_PFAULT_INIT:
383d0b05 2018 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 2019 break;
ba5c1e9b
CO		 2020 case KVM_S390_INT_VIRTIO:
2021 case KVM_S390_INT_SERVICE:
d8346b7d 2022 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 2023 default:
0146a7b0 2024 rc = -EINVAL;
ba5c1e9b 2025 }
79e87a10
JF		 2026
2027 return rc;
2028}
2029
2030int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
2031{
2032 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2033 int rc;
2034
2035 spin_lock(&li->lock);
2036 rc = do_inject_vcpu(vcpu, irq);
4ae3c081 2037 spin_unlock(&li->lock);
0146a7b0
JF		 2038 if (!rc)
2039 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 2040 return rc;
ba5c1e9b 2041}
c05c4186 2042
6d3da241 2043static inline void clear_irq_list(struct list_head *_list)
c05c4186 2044{
6d3da241 2045 struct kvm_s390_interrupt_info *inti, *n;
c05c4186 2046
6d3da241 2047 list_for_each_entry_safe(inti, n, _list, list) {
c05c4186
JF		 2048 list_del(&inti->list);
2049 kfree(inti);
2050 }
c05c4186
JF		 2051}
2052
94aa033e
JF		 2053static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
2054 struct kvm_s390_irq *irq)
c05c4186 2055{
94aa033e 2056 irq->type = inti->type;
c05c4186 2057 switch (inti->type) {
3c038e6b
DD		 2058 case KVM_S390_INT_PFAULT_INIT:
2059 case KVM_S390_INT_PFAULT_DONE:
c05c4186 2060 case KVM_S390_INT_VIRTIO:
94aa033e 2061 irq->u.ext = inti->ext;
c05c4186
JF		 2062 break;
2063 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 2064 irq->u.io = inti->io;
c05c4186 2065 break;
c05c4186 2066 }
c05c4186
JF		 2067}
2068
6d3da241
JF		 2069void kvm_s390_clear_float_irqs(struct kvm *kvm)
2070{
2071 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2072 int i;
2073
2074 spin_lock(&fi->lock);
f2ae45ed
JF		 2075 fi->pending_irqs = 0;
2076 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
2077 memset(&fi->mchk, 0, sizeof(fi->mchk));
6d3da241
JF		 2078 for (i = 0; i < FIRQ_LIST_COUNT; i++)
2079 clear_irq_list(&fi->lists[i]);
2080 for (i = 0; i < FIRQ_MAX_COUNT; i++)
2081 fi->counters[i] = 0;
2082 spin_unlock(&fi->lock);
24160af6 2083 kvm_s390_gisa_clear(kvm);
6d3da241
JF		 2084};
2085
94aa033e 2086static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186 2087{
982cff42 2088 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
c05c4186
JF		 2089 struct kvm_s390_interrupt_info *inti;
2090 struct kvm_s390_float_interrupt *fi;
94aa033e 2091 struct kvm_s390_irq *buf;
6d3da241 2092 struct kvm_s390_irq *irq;
94aa033e 2093 int max_irqs;
c05c4186
JF		 2094 int ret = 0;
2095 int n = 0;
6d3da241 2096 int i;
c05c4186 2097
94aa033e
JF		 2098 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
2099 return -EINVAL;
2100
2101 /*
2102 * We are already using -ENOMEM to signal
2103 * userspace it may retry with a bigger buffer,
2104 * so we need to use something else for this case
2105 */
2106 buf = vzalloc(len);
2107 if (!buf)
2108 return -ENOBUFS;
2109
2110 max_irqs = len / sizeof(struct kvm_s390_irq);
2111
982cff42 2112 if (gi->origin && gisa_get_ipm(gi->origin)) {
24160af6
MM		 2113 for (i = 0; i <= MAX_ISC; i++) {
2114 if (n == max_irqs) {
2115 /* signal userspace to try again */
2116 ret = -ENOMEM;
2117 goto out_nolock;
2118 }
982cff42 2119 if (gisa_tac_ipm_gisc(gi->origin, i)) {
24160af6
MM		 2120 irq = (struct kvm_s390_irq *) &buf[n];
2121 irq->type = KVM_S390_INT_IO(1, 0, 0, 0);
2122 irq->u.io.io_int_word = isc_to_int_word(i);
2123 n++;
2124 }
2125 }
2126 }
c05c4186
JF		 2127 fi = &kvm->arch.float_int;
2128 spin_lock(&fi->lock);
6d3da241
JF		 2129 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
2130 list_for_each_entry(inti, &fi->lists[i], list) {
2131 if (n == max_irqs) {
2132 /* signal userspace to try again */
2133 ret = -ENOMEM;
2134 goto out;
2135 }
2136 inti_to_irq(inti, &buf[n]);
2137 n++;
2138 }
2139 }
2140 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
94aa033e 2141 if (n == max_irqs) {
c05c4186
JF		 2142 /* signal userspace to try again */
2143 ret = -ENOMEM;
6d3da241 2144 goto out;
c05c4186 2145 }
6d3da241
JF		 2146 irq = (struct kvm_s390_irq *) &buf[n];
2147 irq->type = KVM_S390_INT_SERVICE;
2148 irq->u.ext = fi->srv_signal;
c05c4186
JF		 2149 n++;
2150 }
6d3da241
JF		 2151 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
2152 if (n == max_irqs) {
2153 /* signal userspace to try again */
2154 ret = -ENOMEM;
2155 goto out;
2156 }
2157 irq = (struct kvm_s390_irq *) &buf[n];
2158 irq->type = KVM_S390_MCHK;
2159 irq->u.mchk = fi->mchk;
2160 n++;
2161}
2162
2163out:
c05c4186 2164 spin_unlock(&fi->lock);
24160af6 2165out_nolock:
94aa033e
JF		 2166 if (!ret && n > 0) {
2167 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
2168 ret = -EFAULT;
2169 }
2170 vfree(buf);
c05c4186
JF		 2171
2172 return ret < 0 ? ret : n;
2173}
2174
2c1a48f2
YMZ		 2175static int flic_ais_mode_get_all(struct kvm *kvm, struct kvm_device_attr *attr)
2176{
2177 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2178 struct kvm_s390_ais_all ais;
2179
2180 if (attr->attr < sizeof(ais))
2181 return -EINVAL;
2182
2183 if (!test_kvm_facility(kvm, 72))
2184 return -ENOTSUPP;
2185
2186 mutex_lock(&fi->ais_lock);
2187 ais.simm = fi->simm;
2188 ais.nimm = fi->nimm;
2189 mutex_unlock(&fi->ais_lock);
2190
2191 if (copy_to_user((void __user *)attr->addr, &ais, sizeof(ais)))
2192 return -EFAULT;
2193
2194 return 0;
2195}
2196
c05c4186
JF		 2197static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2198{
2199 int r;
2200
2201 switch (attr->group) {
2202 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 2203 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 2204 attr->attr);
2205 break;
2c1a48f2
YMZ		 2206 case KVM_DEV_FLIC_AISM_ALL:
2207 r = flic_ais_mode_get_all(dev->kvm, attr);
2208 break;
c05c4186
JF		 2209 default:
2210 r = -EINVAL;
2211 }
2212
2213 return r;
2214}
2215
2216static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
2217 u64 addr)
2218{
2219 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
2220 void *target = NULL;
2221 void __user *source;
2222 u64 size;
2223
2224 if (get_user(inti->type, (u64 __user *)addr))
2225 return -EFAULT;
2226
2227 switch (inti->type) {
3c038e6b
DD		 2228 case KVM_S390_INT_PFAULT_INIT:
2229 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 2230 case KVM_S390_INT_VIRTIO:
2231 case KVM_S390_INT_SERVICE:
2232 target = (void *) &inti->ext;
2233 source = &uptr->u.ext;
2234 size = sizeof(inti->ext);
2235 break;
2236 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
2237 target = (void *) &inti->io;
2238 source = &uptr->u.io;
2239 size = sizeof(inti->io);
2240 break;
2241 case KVM_S390_MCHK:
2242 target = (void *) &inti->mchk;
2243 source = &uptr->u.mchk;
2244 size = sizeof(inti->mchk);
2245 break;
2246 default:
2247 return -EINVAL;
2248 }
2249
2250 if (copy_from_user(target, source, size))
2251 return -EFAULT;
2252
2253 return 0;
2254}
2255
2256static int enqueue_floating_irq(struct kvm_device *dev,
2257 struct kvm_device_attr *attr)
2258{
2259 struct kvm_s390_interrupt_info *inti = NULL;
2260 int r = 0;
2261 int len = attr->attr;
2262
2263 if (len % sizeof(struct kvm_s390_irq) != 0)
2264 return -EINVAL;
2265 else if (len > KVM_S390_FLIC_MAX_BUFFER)
2266 return -EINVAL;
2267
2268 while (len >= sizeof(struct kvm_s390_irq)) {
2269 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
2270 if (!inti)
2271 return -ENOMEM;
2272
2273 r = copy_irq_from_user(inti, attr->addr);
2274 if (r) {
2275 kfree(inti);
2276 return r;
2277 }
a91b8ebe
JF		 2278 r = __inject_vm(dev->kvm, inti);
2279 if (r) {
2280 kfree(inti);
2281 return r;
2282 }
c05c4186
JF		 2283 len -= sizeof(struct kvm_s390_irq);
2284 attr->addr += sizeof(struct kvm_s390_irq);
2285 }
2286
2287 return r;
2288}
2289
841b91c5
CH		 2290static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
2291{
2292 if (id >= MAX_S390_IO_ADAPTERS)
2293 return NULL;
58616e6a 2294 id = array_index_nospec(id, MAX_S390_IO_ADAPTERS);
841b91c5
CH		 2295 return kvm->arch.adapters[id];
2296}
2297
2298static int register_io_adapter(struct kvm_device *dev,
2299 struct kvm_device_attr *attr)
2300{
2301 struct s390_io_adapter *adapter;
2302 struct kvm_s390_io_adapter adapter_info;
2303
2304 if (copy_from_user(&adapter_info,
2305 (void __user *)attr->addr, sizeof(adapter_info)))
2306 return -EFAULT;
2307
58616e6a
EF		 2308 if (adapter_info.id >= MAX_S390_IO_ADAPTERS)
2309 return -EINVAL;
2310
2311 adapter_info.id = array_index_nospec(adapter_info.id,
2312 MAX_S390_IO_ADAPTERS);
2313
2314 if (dev->kvm->arch.adapters[adapter_info.id] != NULL)
841b91c5
CH		 2315 return -EINVAL;
2316
2317 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2318 if (!adapter)
2319 return -ENOMEM;
2320
2321 INIT_LIST_HEAD(&adapter->maps);
2322 init_rwsem(&adapter->maps_lock);
2323 atomic_set(&adapter->nr_maps, 0);
2324 adapter->id = adapter_info.id;
2325 adapter->isc = adapter_info.isc;
2326 adapter->maskable = adapter_info.maskable;
2327 adapter->masked = false;
2328 adapter->swap = adapter_info.swap;
08fab50d
FL		 2329 adapter->suppressible = (adapter_info.flags) &
2330 KVM_S390_ADAPTER_SUPPRESSIBLE;
841b91c5
CH		 2331 dev->kvm->arch.adapters[adapter->id] = adapter;
2332
2333 return 0;
2334}
2335
2336int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
2337{
2338 int ret;
2339 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2340
2341 if (!adapter || !adapter->maskable)
2342 return -EINVAL;
2343 ret = adapter->masked;
2344 adapter->masked = masked;
2345 return ret;
2346}
2347
2348static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
2349{
2350 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2351 struct s390_map_info *map;
2352 int ret;
2353
2354 if (!adapter || !addr)
2355 return -EINVAL;
2356
2357 map = kzalloc(sizeof(*map), GFP_KERNEL);
2358 if (!map) {
2359 ret = -ENOMEM;
2360 goto out;
2361 }
2362 INIT_LIST_HEAD(&map->list);
2363 map->guest_addr = addr;
6e0a0431 2364 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 2365 if (map->addr == -EFAULT) {
2366 ret = -EFAULT;
2367 goto out;
2368 }
73b0140b 2369 ret = get_user_pages_fast(map->addr, 1, FOLL_WRITE, &map->page);
841b91c5
CH		 2370 if (ret < 0)
2371 goto out;
2372 BUG_ON(ret != 1);
2373 down_write(&adapter->maps_lock);
2374 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
2375 list_add_tail(&map->list, &adapter->maps);
2376 ret = 0;
2377 } else {
2378 put_page(map->page);
2379 ret = -EINVAL;
2380 }
2381 up_write(&adapter->maps_lock);
2382out:
2383 if (ret)
2384 kfree(map);
2385 return ret;
2386}
2387
2388static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
2389{
2390 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2391 struct s390_map_info *map, *tmp;
2392 int found = 0;
2393
2394 if (!adapter || !addr)
2395 return -EINVAL;
2396
2397 down_write(&adapter->maps_lock);
2398 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
2399 if (map->guest_addr == addr) {
2400 found = 1;
2401 atomic_dec(&adapter->nr_maps);
2402 list_del(&map->list);
2403 put_page(map->page);
2404 kfree(map);
2405 break;
2406 }
2407 }
2408 up_write(&adapter->maps_lock);
2409
2410 return found ? 0 : -EINVAL;
2411}
2412
2413void kvm_s390_destroy_adapters(struct kvm *kvm)
2414{
2415 int i;
2416 struct s390_map_info *map, *tmp;
2417
2418 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
2419 if (!kvm->arch.adapters[i])
2420 continue;
2421 list_for_each_entry_safe(map, tmp,
2422 &kvm->arch.adapters[i]->maps, list) {
2423 list_del(&map->list);
2424 put_page(map->page);
2425 kfree(map);
2426 }
2427 kfree(kvm->arch.adapters[i]);
2428 }
2429}
2430
2431static int modify_io_adapter(struct kvm_device *dev,
2432 struct kvm_device_attr *attr)
2433{
2434 struct kvm_s390_io_adapter_req req;
2435 struct s390_io_adapter *adapter;
2436 int ret;
2437
2438 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2439 return -EFAULT;
2440
2441 adapter = get_io_adapter(dev->kvm, req.id);
2442 if (!adapter)
2443 return -EINVAL;
2444 switch (req.type) {
2445 case KVM_S390_IO_ADAPTER_MASK:
2446 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
2447 if (ret > 0)
2448 ret = 0;
2449 break;
2450 case KVM_S390_IO_ADAPTER_MAP:
2451 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
2452 break;
2453 case KVM_S390_IO_ADAPTER_UNMAP:
2454 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
2455 break;
2456 default:
2457 ret = -EINVAL;
2458 }
2459
2460 return ret;
2461}
2462
6d28f789
HP		 2463static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
2464
2465{
2466 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
2467 u32 schid;
2468
2469 if (attr->flags)
2470 return -EINVAL;
2471 if (attr->attr != sizeof(schid))
2472 return -EINVAL;
2473 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
2474 return -EFAULT;
4dd6f17e
MM		 2475 if (!schid)
2476 return -EINVAL;
6d28f789
HP		 2477 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
2478 /*
2479 * If userspace is conforming to the architecture, we can have at most
2480 * one pending I/O interrupt per subchannel, so this is effectively a
2481 * clear all.
2482 */
2483 return 0;
2484}
2485
51978393
FL		 2486static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr)
2487{
2488 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2489 struct kvm_s390_ais_req req;
2490 int ret = 0;
2491
1ba15b24 2492 if (!test_kvm_facility(kvm, 72))
51978393
FL		 2493 return -ENOTSUPP;
2494
2495 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2496 return -EFAULT;
2497
2498 if (req.isc > MAX_ISC)
2499 return -EINVAL;
2500
2501 trace_kvm_s390_modify_ais_mode(req.isc,
2502 (fi->simm & AIS_MODE_MASK(req.isc)) ?
2503 (fi->nimm & AIS_MODE_MASK(req.isc)) ?
2504 2 : KVM_S390_AIS_MODE_SINGLE :
2505 KVM_S390_AIS_MODE_ALL, req.mode);
2506
2507 mutex_lock(&fi->ais_lock);
2508 switch (req.mode) {
2509 case KVM_S390_AIS_MODE_ALL:
2510 fi->simm &= ~AIS_MODE_MASK(req.isc);
2511 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2512 break;
2513 case KVM_S390_AIS_MODE_SINGLE:
2514 fi->simm |= AIS_MODE_MASK(req.isc);
2515 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2516 break;
2517 default:
2518 ret = -EINVAL;
2519 }
2520 mutex_unlock(&fi->ais_lock);
2521
2522 return ret;
2523}
2524
a8920950
YMZ		 2525static int kvm_s390_inject_airq(struct kvm *kvm,
2526 struct s390_io_adapter *adapter)
2527{
2528 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2529 struct kvm_s390_interrupt s390int = {
2530 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2531 .parm = 0,
2496c8e7 2532 .parm64 = isc_to_int_word(adapter->isc),
a8920950
YMZ		 2533 };
2534 int ret = 0;
2535
1ba15b24 2536 if (!test_kvm_facility(kvm, 72) || !adapter->suppressible)
a8920950
YMZ		 2537 return kvm_s390_inject_vm(kvm, &s390int);
2538
2539 mutex_lock(&fi->ais_lock);
2540 if (fi->nimm & AIS_MODE_MASK(adapter->isc)) {
2541 trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc);
2542 goto out;
2543 }
2544
2545 ret = kvm_s390_inject_vm(kvm, &s390int);
2546 if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) {
2547 fi->nimm |= AIS_MODE_MASK(adapter->isc);
2548 trace_kvm_s390_modify_ais_mode(adapter->isc,
2549 KVM_S390_AIS_MODE_SINGLE, 2);
2550 }
2551out:
2552 mutex_unlock(&fi->ais_lock);
2553 return ret;
2554}
2555
2556static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr)
2557{
2558 unsigned int id = attr->attr;
2559 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2560
2561 if (!adapter)
2562 return -EINVAL;
2563
2564 return kvm_s390_inject_airq(kvm, adapter);
2565}
2566
2c1a48f2
YMZ		 2567static int flic_ais_mode_set_all(struct kvm *kvm, struct kvm_device_attr *attr)
2568{
2569 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2570 struct kvm_s390_ais_all ais;
2571
2572 if (!test_kvm_facility(kvm, 72))
2573 return -ENOTSUPP;
2574
2575 if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais)))
2576 return -EFAULT;
2577
2578 mutex_lock(&fi->ais_lock);
2579 fi->simm = ais.simm;
2580 fi->nimm = ais.nimm;
2581 mutex_unlock(&fi->ais_lock);
2582
2583 return 0;
2584}
2585
c05c4186
JF		 2586static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2587{
2588 int r = 0;
3c038e6b
DD		 2589 unsigned int i;
2590 struct kvm_vcpu *vcpu;
c05c4186
JF		 2591
2592 switch (attr->group) {
2593 case KVM_DEV_FLIC_ENQUEUE:
2594 r = enqueue_floating_irq(dev, attr);
2595 break;
2596 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 2597 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 2598 break;
3c038e6b
DD		 2599 case KVM_DEV_FLIC_APF_ENABLE:
2600 dev->kvm->arch.gmap->pfault_enabled = 1;
2601 break;
2602 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2603 dev->kvm->arch.gmap->pfault_enabled = 0;
2604 /*
2605 * Make sure no async faults are in transition when
2606 * clearing the queues. So we don't need to worry
2607 * about late coming workers.
2608 */
2609 synchronize_srcu(&dev->kvm->srcu);
2610 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2611 kvm_clear_async_pf_completion_queue(vcpu);
2612 break;
841b91c5
CH		 2613 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2614 r = register_io_adapter(dev, attr);
2615 break;
2616 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2617 r = modify_io_adapter(dev, attr);
2618 break;
6d28f789
HP		 2619 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2620 r = clear_io_irq(dev->kvm, attr);
2621 break;
51978393
FL		 2622 case KVM_DEV_FLIC_AISM:
2623 r = modify_ais_mode(dev->kvm, attr);
2624 break;
a8920950
YMZ		 2625 case KVM_DEV_FLIC_AIRQ_INJECT:
2626 r = flic_inject_airq(dev->kvm, attr);
2627 break;
2c1a48f2
YMZ		 2628 case KVM_DEV_FLIC_AISM_ALL:
2629 r = flic_ais_mode_set_all(dev->kvm, attr);
2630 break;
c05c4186
JF		 2631 default:
2632 r = -EINVAL;
2633 }
2634
2635 return r;
2636}
2637
4f129858
HP		 2638static int flic_has_attr(struct kvm_device *dev,
2639 struct kvm_device_attr *attr)
2640{
2641 switch (attr->group) {
2642 case KVM_DEV_FLIC_GET_ALL_IRQS:
2643 case KVM_DEV_FLIC_ENQUEUE:
2644 case KVM_DEV_FLIC_CLEAR_IRQS:
2645 case KVM_DEV_FLIC_APF_ENABLE:
2646 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2647 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2648 case KVM_DEV_FLIC_ADAPTER_MODIFY:
6d28f789 2649 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
51978393 2650 case KVM_DEV_FLIC_AISM:
a8920950 2651 case KVM_DEV_FLIC_AIRQ_INJECT:
2c1a48f2 2652 case KVM_DEV_FLIC_AISM_ALL:
4f129858
HP		 2653 return 0;
2654 }
2655 return -ENXIO;
2656}
2657
c05c4186
JF		 2658static int flic_create(struct kvm_device *dev, u32 type)
2659{
2660 if (!dev)
2661 return -EINVAL;
2662 if (dev->kvm->arch.flic)
2663 return -EINVAL;
2664 dev->kvm->arch.flic = dev;
2665 return 0;
2666}
2667
2668static void flic_destroy(struct kvm_device *dev)
2669{
2670 dev->kvm->arch.flic = NULL;
2671 kfree(dev);
2672}
2673
2674/* s390 floating irq controller (flic) */
2675struct kvm_device_ops kvm_flic_ops = {
2676 .name = "kvm-flic",
2677 .get_attr = flic_get_attr,
2678 .set_attr = flic_set_attr,
4f129858 2679 .has_attr = flic_has_attr,
c05c4186
JF		 2680 .create = flic_create,
2681 .destroy = flic_destroy,
2682};
84223598
CH		 2683
2684static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2685{
2686 unsigned long bit;
2687
2688 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2689
2690 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2691}
2692
2693static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2694 u64 addr)
2695{
2696 struct s390_map_info *map;
2697
2698 if (!adapter)
2699 return NULL;
2700
2701 list_for_each_entry(map, &adapter->maps, list) {
2702 if (map->guest_addr == addr)
2703 return map;
2704 }
2705 return NULL;
2706}
2707
2708static int adapter_indicators_set(struct kvm *kvm,
2709 struct s390_io_adapter *adapter,
2710 struct kvm_s390_adapter_int *adapter_int)
2711{
2712 unsigned long bit;
2713 int summary_set, idx;
2714 struct s390_map_info *info;
2715 void *map;
2716
2717 info = get_map_info(adapter, adapter_int->ind_addr);
2718 if (!info)
2719 return -1;
2720 map = page_address(info->page);
2721 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2722 set_bit(bit, map);
2723 idx = srcu_read_lock(&kvm->srcu);
2724 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2725 set_page_dirty_lock(info->page);
2726 info = get_map_info(adapter, adapter_int->summary_addr);
2727 if (!info) {
2728 srcu_read_unlock(&kvm->srcu, idx);
2729 return -1;
2730 }
2731 map = page_address(info->page);
2732 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2733 adapter->swap);
2734 summary_set = test_and_set_bit(bit, map);
2735 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2736 set_page_dirty_lock(info->page);
2737 srcu_read_unlock(&kvm->srcu, idx);
2738 return summary_set ? 0 : 1;
2739}
2740
2741/*
2742 * < 0 - not injected due to error
2743 * = 0 - coalesced, summary indicator already active
2744 * > 0 - injected interrupt
2745 */
2746static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2747 struct kvm *kvm, int irq_source_id, int level,
2748 bool line_status)
2749{
2750 int ret;
2751 struct s390_io_adapter *adapter;
2752
2753 /* We're only interested in the 0->1 transition. */
2754 if (!level)
2755 return 0;
2756 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2757 if (!adapter)
2758 return -1;
2759 down_read(&adapter->maps_lock);
2760 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2761 up_read(&adapter->maps_lock);
2762 if ((ret > 0) && !adapter->masked) {
a8920950 2763 ret = kvm_s390_inject_airq(kvm, adapter);
84223598
CH		 2764 if (ret == 0)
2765 ret = 1;
2766 }
2767 return ret;
2768}
2769
4d62fcc0
QH		 2770/*
2771 * Inject the machine check to the guest.
2772 */
2773void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
2774 struct mcck_volatile_info *mcck_info)
2775{
2776 struct kvm_s390_interrupt_info inti;
2777 struct kvm_s390_irq irq;
2778 struct kvm_s390_mchk_info *mchk;
2779 union mci mci;
2780 __u64 cr14 = 0; /* upper bits are not used */
3dbf0205 2781 int rc;
4d62fcc0
QH		 2782
2783 mci.val = mcck_info->mcic;
2784 if (mci.sr)
cc65450c 2785 cr14 |= CR14_RECOVERY_SUBMASK;
4d62fcc0 2786 if (mci.dg)
cc65450c 2787 cr14 |= CR14_DEGRADATION_SUBMASK;
4d62fcc0 2788 if (mci.w)
cc65450c 2789 cr14 |= CR14_WARNING_SUBMASK;
4d62fcc0
QH		 2790
2791 mchk = mci.ck ? &inti.mchk : &irq.u.mchk;
2792 mchk->cr14 = cr14;
2793 mchk->mcic = mcck_info->mcic;
2794 mchk->ext_damage_code = mcck_info->ext_damage_code;
2795 mchk->failing_storage_address = mcck_info->failing_storage_address;
2796 if (mci.ck) {
2797 /* Inject the floating machine check */
2798 inti.type = KVM_S390_MCHK;
3dbf0205 2799 rc = __inject_vm(vcpu->kvm, &inti);
4d62fcc0
QH		 2800 } else {
2801 /* Inject the machine check to specified vcpu */
2802 irq.type = KVM_S390_MCHK;
3dbf0205 2803 rc = kvm_s390_inject_vcpu(vcpu, &irq);
4d62fcc0 2804 }
3dbf0205 2805 WARN_ON_ONCE(rc);
4d62fcc0
QH		 2806}
2807
c63cf538
RK		 2808int kvm_set_routing_entry(struct kvm *kvm,
2809 struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 2810 const struct kvm_irq_routing_entry *ue)
2811{
2812 int ret;
2813
2814 switch (ue->type) {
2815 case KVM_IRQ_ROUTING_S390_ADAPTER:
2816 e->set = set_adapter_int;
2817 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2818 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2819 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2820 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2821 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2822 ret = 0;
2823 break;
2824 default:
2825 ret = -EINVAL;
2826 }
2827
2828 return ret;
2829}
2830
2831int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2832 int irq_source_id, int level, bool line_status)
2833{
2834 return -EINVAL;
2835}
816c7667
JF		 2836
2837int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2838{
2839 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2840 struct kvm_s390_irq *buf;
2841 int r = 0;
2842 int n;
2843
2844 buf = vmalloc(len);
2845 if (!buf)
2846 return -ENOMEM;
2847
2848 if (copy_from_user((void *) buf, irqstate, len)) {
2849 r = -EFAULT;
2850 goto out_free;
2851 }
2852
2853 /*
2854 * Don't allow setting the interrupt state
2855 * when there are already interrupts pending
2856 */
2857 spin_lock(&li->lock);
2858 if (li->pending_irqs) {
2859 r = -EBUSY;
2860 goto out_unlock;
2861 }
2862
2863 for (n = 0; n < len / sizeof(*buf); n++) {
2864 r = do_inject_vcpu(vcpu, &buf[n]);
2865 if (r)
2866 break;
2867 }
2868
2869out_unlock:
2870 spin_unlock(&li->lock);
2871out_free:
2872 vfree(buf);
2873
2874 return r;
2875}
2876
2877static void store_local_irq(struct kvm_s390_local_interrupt *li,
2878 struct kvm_s390_irq *irq,
2879 unsigned long irq_type)
2880{
2881 switch (irq_type) {
2882 case IRQ_PEND_MCHK_EX:
2883 case IRQ_PEND_MCHK_REP:
2884 irq->type = KVM_S390_MCHK;
2885 irq->u.mchk = li->irq.mchk;
2886 break;
2887 case IRQ_PEND_PROG:
2888 irq->type = KVM_S390_PROGRAM_INT;
2889 irq->u.pgm = li->irq.pgm;
2890 break;
2891 case IRQ_PEND_PFAULT_INIT:
2892 irq->type = KVM_S390_INT_PFAULT_INIT;
2893 irq->u.ext = li->irq.ext;
2894 break;
2895 case IRQ_PEND_EXT_EXTERNAL:
2896 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2897 irq->u.extcall = li->irq.extcall;
2898 break;
2899 case IRQ_PEND_EXT_CLOCK_COMP:
2900 irq->type = KVM_S390_INT_CLOCK_COMP;
2901 break;
2902 case IRQ_PEND_EXT_CPU_TIMER:
2903 irq->type = KVM_S390_INT_CPU_TIMER;
2904 break;
2905 case IRQ_PEND_SIGP_STOP:
2906 irq->type = KVM_S390_SIGP_STOP;
2907 irq->u.stop = li->irq.stop;
2908 break;
2909 case IRQ_PEND_RESTART:
2910 irq->type = KVM_S390_RESTART;
2911 break;
2912 case IRQ_PEND_SET_PREFIX:
2913 irq->type = KVM_S390_SIGP_SET_PREFIX;
2914 irq->u.prefix = li->irq.prefix;
2915 break;
2916 }
2917}
2918
2919int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2920{
a5bd7647 2921 int scn;
689bdf9e 2922 DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
816c7667
JF		 2923 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2924 unsigned long pending_irqs;
2925 struct kvm_s390_irq irq;
2926 unsigned long irq_type;
2927 int cpuaddr;
2928 int n = 0;
2929
2930 spin_lock(&li->lock);
2931 pending_irqs = li->pending_irqs;
2932 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2933 sizeof(sigp_emerg_pending));
2934 spin_unlock(&li->lock);
2935
2936 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2937 memset(&irq, 0, sizeof(irq));
2938 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2939 continue;
2940 if (n + sizeof(irq) > len)
2941 return -ENOBUFS;
2942 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2943 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2944 return -EFAULT;
2945 n += sizeof(irq);
2946 }
2947
2948 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2949 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2950 memset(&irq, 0, sizeof(irq));
2951 if (n + sizeof(irq) > len)
2952 return -ENOBUFS;
2953 irq.type = KVM_S390_INT_EMERGENCY;
2954 irq.u.emerg.code = cpuaddr;
2955 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2956 return -EFAULT;
2957 n += sizeof(irq);
2958 }
2959 }
2960
a5bd7647 2961 if (sca_ext_call_pending(vcpu, &scn)) {
816c7667
JF		 2962 if (n + sizeof(irq) > len)
2963 return -ENOBUFS;
2964 memset(&irq, 0, sizeof(irq));
2965 irq.type = KVM_S390_INT_EXTERNAL_CALL;
a5bd7647 2966 irq.u.extcall.code = scn;
816c7667
JF		 2967 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2968 return -EFAULT;
2969 n += sizeof(irq);
2970 }
2971
2972 return n;
2973}
d7c5cb01 2974
9f30f621
MM		 2975static void __airqs_kick_single_vcpu(struct kvm *kvm, u8 deliverable_mask)
2976{
2977 int vcpu_id, online_vcpus = atomic_read(&kvm->online_vcpus);
2978 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
2979 struct kvm_vcpu *vcpu;
2980
2981 for_each_set_bit(vcpu_id, kvm->arch.idle_mask, online_vcpus) {
2982 vcpu = kvm_get_vcpu(kvm, vcpu_id);
2983 if (psw_ioint_disabled(vcpu))
2984 continue;
2985 deliverable_mask &= (u8)(vcpu->arch.sie_block->gcr[6] >> 24);
2986 if (deliverable_mask) {
2987 /* lately kicked but not yet running */
2988 if (test_and_set_bit(vcpu_id, gi->kicked_mask))
2989 return;
2990 kvm_s390_vcpu_wakeup(vcpu);
2991 return;
2992 }
2993 }
2994}
2995
2996static enum hrtimer_restart gisa_vcpu_kicker(struct hrtimer *timer)
2997{
2998 struct kvm_s390_gisa_interrupt *gi =
2999 container_of(timer, struct kvm_s390_gisa_interrupt, timer);
3000 struct kvm *kvm =
3001 container_of(gi->origin, struct sie_page2, gisa)->kvm;
3002 u8 pending_mask;
3003
3004 pending_mask = gisa_get_ipm_or_restore_iam(gi);
3005 if (pending_mask) {
3006 __airqs_kick_single_vcpu(kvm, pending_mask);
3007 hrtimer_forward_now(timer, ns_to_ktime(gi->expires));
3008 return HRTIMER_RESTART;
3009 };
3010
3011 return HRTIMER_NORESTART;
3012}
3013
3014#define NULL_GISA_ADDR 0x00000000UL
3015#define NONE_GISA_ADDR 0x00000001UL
3016#define GISA_ADDR_MASK 0xfffff000UL
3017
3018static void process_gib_alert_list(void)
3019{
3020 struct kvm_s390_gisa_interrupt *gi;
3021 struct kvm_s390_gisa *gisa;
3022 struct kvm *kvm;
3023 u32 final, origin = 0UL;
3024
3025 do {
3026 /*
3027 * If the NONE_GISA_ADDR is still stored in the alert list
3028 * origin, we will leave the outer loop. No further GISA has
3029 * been added to the alert list by millicode while processing
3030 * the current alert list.
3031 */
3032 final = (origin & NONE_GISA_ADDR);
3033 /*
3034 * Cut off the alert list and store the NONE_GISA_ADDR in the
3035 * alert list origin to avoid further GAL interruptions.
3036 * A new alert list can be build up by millicode in parallel
3037 * for guests not in the yet cut-off alert list. When in the
3038 * final loop, store the NULL_GISA_ADDR instead. This will re-
3039 * enable GAL interruptions on the host again.
3040 */
3041 origin = xchg(&gib->alert_list_origin,
3042 (!final) ? NONE_GISA_ADDR : NULL_GISA_ADDR);
3043 /*
3044 * Loop through the just cut-off alert list and start the
3045 * gisa timers to kick idle vcpus to consume the pending
3046 * interruptions asap.
3047 */
3048 while (origin & GISA_ADDR_MASK) {
3049 gisa = (struct kvm_s390_gisa *)(u64)origin;
3050 origin = gisa->next_alert;
3051 gisa->next_alert = (u32)(u64)gisa;
3052 kvm = container_of(gisa, struct sie_page2, gisa)->kvm;
3053 gi = &kvm->arch.gisa_int;
3054 if (hrtimer_active(&gi->timer))
3055 hrtimer_cancel(&gi->timer);
3056 hrtimer_start(&gi->timer, 0, HRTIMER_MODE_REL);
3057 }
3058 } while (!final);
3059
3060}
3061
d7c5cb01
MM		 3062void kvm_s390_gisa_clear(struct kvm *kvm)
3063{
982cff42
MM		 3064 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3065
3066 if (!gi->origin)
672128bf 3067 return;
174dd4f8 3068 gisa_clear_ipm(gi->origin);
982cff42 3069 VM_EVENT(kvm, 3, "gisa 0x%pK cleared", gi->origin);
d7c5cb01
MM		 3070}
3071
3072void kvm_s390_gisa_init(struct kvm *kvm)
3073{
982cff42
MM		 3074 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3075
672128bf
MM		 3076 if (!css_general_characteristics.aiv)
3077 return;
982cff42 3078 gi->origin = &kvm->arch.sie_page2->gisa;
6cff2e10
MM		 3079 gi->alert.mask = 0;
3080 spin_lock_init(&gi->alert.ref_lock);
9f30f621
MM		 3081 gi->expires = 50 * 1000; /* 50 usec */
3082 hrtimer_init(&gi->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
3083 gi->timer.function = gisa_vcpu_kicker;
174dd4f8
MM		 3084 memset(gi->origin, 0, sizeof(struct kvm_s390_gisa));
3085 gi->origin->next_alert = (u32)(u64)gi->origin;
982cff42 3086 VM_EVENT(kvm, 3, "gisa 0x%pK initialized", gi->origin);
d7c5cb01
MM		 3087}
3088
3089void kvm_s390_gisa_destroy(struct kvm *kvm)
3090{
9f30f621
MM		 3091 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3092
3093 if (!gi->origin)
3094 return;
3095 if (gi->alert.mask)
3096 KVM_EVENT(3, "vm 0x%pK has unexpected iam 0x%02x",
3097 kvm, gi->alert.mask);
3098 while (gisa_in_alert_list(gi->origin))
3099 cpu_relax();
3100 hrtimer_cancel(&gi->timer);
3101 gi->origin = NULL;
d7c5cb01 3102}
1282c21e 3103
6cff2e10
MM		 3104/**
3105 * kvm_s390_gisc_register - register a guest ISC
3106 *
3107 * @kvm: the kernel vm to work with
3108 * @gisc: the guest interruption sub class to register
3109 *
3110 * The function extends the vm specific alert mask to use.
3111 * The effective IAM mask in the GISA is updated as well
3112 * in case the GISA is not part of the GIB alert list.
3113 * It will be updated latest when the IAM gets restored
3114 * by gisa_get_ipm_or_restore_iam().
3115 *
3116 * Returns: the nonspecific ISC (NISC) the gib alert mechanism
3117 * has registered with the channel subsystem.
3118 * -ENODEV in case the vm uses no GISA
3119 * -ERANGE in case the guest ISC is invalid
3120 */
3121int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc)
3122{
3123 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3124
3125 if (!gi->origin)
3126 return -ENODEV;
3127 if (gisc > MAX_ISC)
3128 return -ERANGE;
3129
3130 spin_lock(&gi->alert.ref_lock);
3131 gi->alert.ref_count[gisc]++;
3132 if (gi->alert.ref_count[gisc] == 1) {
3133 gi->alert.mask |= 0x80 >> gisc;
3134 gisa_set_iam(gi->origin, gi->alert.mask);
3135 }
3136 spin_unlock(&gi->alert.ref_lock);
3137
3138 return gib->nisc;
3139}
3140EXPORT_SYMBOL_GPL(kvm_s390_gisc_register);
3141
3142/**
3143 * kvm_s390_gisc_unregister - unregister a guest ISC
3144 *
3145 * @kvm: the kernel vm to work with
3146 * @gisc: the guest interruption sub class to register
3147 *
3148 * The function reduces the vm specific alert mask to use.
3149 * The effective IAM mask in the GISA is updated as well
3150 * in case the GISA is not part of the GIB alert list.
3151 * It will be updated latest when the IAM gets restored
3152 * by gisa_get_ipm_or_restore_iam().
3153 *
3154 * Returns: the nonspecific ISC (NISC) the gib alert mechanism
3155 * has registered with the channel subsystem.
3156 * -ENODEV in case the vm uses no GISA
3157 * -ERANGE in case the guest ISC is invalid
3158 * -EINVAL in case the guest ISC is not registered
3159 */
3160int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc)
3161{
3162 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3163 int rc = 0;
3164
3165 if (!gi->origin)
3166 return -ENODEV;
3167 if (gisc > MAX_ISC)
3168 return -ERANGE;
3169
3170 spin_lock(&gi->alert.ref_lock);
3171 if (gi->alert.ref_count[gisc] == 0) {
3172 rc = -EINVAL;
3173 goto out;
3174 }
3175 gi->alert.ref_count[gisc]--;
3176 if (gi->alert.ref_count[gisc] == 0) {
3177 gi->alert.mask &= ~(0x80 >> gisc);
3178 gisa_set_iam(gi->origin, gi->alert.mask);
3179 }
3180out:
3181 spin_unlock(&gi->alert.ref_lock);
3182
3183 return rc;
3184}
3185EXPORT_SYMBOL_GPL(kvm_s390_gisc_unregister);
3186
30e63ef2 3187static void gib_alert_irq_handler(struct airq_struct *airq, bool floating)
9f30f621
MM		 3188{
3189 inc_irq_stat(IRQIO_GAL);
3190 process_gib_alert_list();
3191}
3192
3193static struct airq_struct gib_alert_irq = {
3194 .handler = gib_alert_irq_handler,
3195 .lsi_ptr = &gib_alert_irq.lsi_mask,
3196};
3197
1282c21e
MM		 3198void kvm_s390_gib_destroy(void)
3199{
3200 if (!gib)
3201 return;
3202 chsc_sgib(0);
9f30f621 3203 unregister_adapter_interrupt(&gib_alert_irq);
1282c21e
MM		 3204 free_page((unsigned long)gib);
3205 gib = NULL;
3206}
3207
3208int kvm_s390_gib_init(u8 nisc)
3209{
3210 int rc = 0;
3211
3212 if (!css_general_characteristics.aiv) {
3213 KVM_EVENT(3, "%s", "gib not initialized, no AIV facility");
3214 goto out;
3215 }
3216
3217 gib = (struct kvm_s390_gib *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
3218 if (!gib) {
3219 rc = -ENOMEM;
3220 goto out;
3221 }
3222
9f30f621
MM		 3223 gib_alert_irq.isc = nisc;
3224 if (register_adapter_interrupt(&gib_alert_irq)) {
3225 pr_err("Registering the GIB alert interruption handler failed\n");
3226 rc = -EIO;
3227 goto out_free_gib;
3228 }
3229
1282c21e
MM		 3230 gib->nisc = nisc;
3231 if (chsc_sgib((u32)(u64)gib)) {
3232 pr_err("Associating the GIB with the AIV facility failed\n");
3233 free_page((unsigned long)gib);
3234 gib = NULL;
3235 rc = -EIO;
9f30f621 3236 goto out_unreg_gal;
1282c21e
MM		 3237 }
3238
3239 KVM_EVENT(3, "gib 0x%pK (nisc=%d) initialized", gib, gib->nisc);
9f30f621
MM		 3240 goto out;
3241
3242out_unreg_gal:
3243 unregister_adapter_interrupt(&gib_alert_irq);
3244out_free_gib:
3245 free_page((unsigned long)gib);
3246 gib = NULL;
1282c21e
MM		 3247out:
3248 return rc;
3249}
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