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Merge tag 'block-5.7-2020-05-16' of git://git.kernel.dk/linux-block
[thirdparty/linux.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 *
f6547066 5 * Copyright IBM Corp. 2008, 2020
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{
0890ddea
CB		 327 unsigned long pending = vcpu->kvm->arch.float_int.pending_irqs |
328 vcpu->arch.local_int.pending_irqs;
329
330 pending &= ~vcpu->kvm->arch.float_int.masked_irqs;
331 return pending;
8846f317
CB		 332}
333
334static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
335{
b9fa6d6e
MM		 336 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
337 unsigned long pending_mask;
338
339 pending_mask = pending_irqs_no_gisa(vcpu);
340 if (gi->origin)
341 pending_mask |= gisa_get_ipm(gi->origin) << IRQ_PEND_IO_ISC_7;
342 return pending_mask;
383d0b05
JF		 343}
344
ee739f4b
MM		 345static inline int isc_to_irq_type(unsigned long isc)
346{
c7901a6e 347 return IRQ_PEND_IO_ISC_0 - isc;
ee739f4b
MM		 348}
349
350static inline int irq_type_to_isc(unsigned long irq_type)
351{
c7901a6e 352 return IRQ_PEND_IO_ISC_0 - irq_type;
ee739f4b
MM		 353}
354
6d3da241
JF		 355static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
356 unsigned long active_mask)
357{
358 int i;
359
360 for (i = 0; i <= MAX_ISC; i++)
361 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
ee739f4b 362 active_mask &= ~(1UL << (isc_to_irq_type(i)));
6d3da241
JF		 363
364 return active_mask;
365}
366
367static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
383d0b05 368{
6d3da241
JF		 369 unsigned long active_mask;
370
5f94c58e 371 active_mask = pending_irqs(vcpu);
ffeca0ae
JF		 372 if (!active_mask)
373 return 0;
383d0b05
JF		 374
375 if (psw_extint_disabled(vcpu))
376 active_mask &= ~IRQ_PEND_EXT_MASK;
6d3da241
JF		 377 if (psw_ioint_disabled(vcpu))
378 active_mask &= ~IRQ_PEND_IO_MASK;
379 else
380 active_mask = disable_iscs(vcpu, active_mask);
b9224cd7 381 if (!(vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK))
383d0b05 382 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
b9224cd7 383 if (!(vcpu->arch.sie_block->gcr[0] & CR0_EMERGENCY_SIGNAL_SUBMASK))
383d0b05 384 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
b9224cd7 385 if (!(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK))
383d0b05 386 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
b9224cd7 387 if (!(vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK))
383d0b05 388 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
0890ddea 389 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK)) {
6d3da241 390 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
0890ddea
CB		 391 __clear_bit(IRQ_PEND_EXT_SERVICE_EV, &active_mask);
392 }
383d0b05
JF		 393 if (psw_mchk_disabled(vcpu))
394 active_mask &= ~IRQ_PEND_MCHK_MASK;
201ae986 395 /* PV guest cpus can have a single interruption injected at a time. */
d47c4c45 396 if (kvm_s390_pv_cpu_get_handle(vcpu) &&
201ae986
MM		 397 vcpu->arch.sie_block->iictl != IICTL_CODE_NONE)
398 active_mask &= ~(IRQ_PEND_EXT_II_MASK |
399 IRQ_PEND_IO_MASK |
400 IRQ_PEND_MCHK_MASK);
4d62fcc0
QH		 401 /*
402 * Check both floating and local interrupt's cr14 because
403 * bit IRQ_PEND_MCHK_REP could be set in both cases.
404 */
6d3da241 405 if (!(vcpu->arch.sie_block->gcr[14] &
4d62fcc0
QH		 406 (vcpu->kvm->arch.float_int.mchk.cr14 |
407 vcpu->arch.local_int.irq.mchk.cr14)))
6d3da241 408 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
383d0b05 409
6cddd432
DH		 410 /*
411 * STOP irqs will never be actively delivered. They are triggered via
412 * intercept requests and cleared when the stop intercept is performed.
413 */
414 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
415
383d0b05
JF		 416 return active_mask;
417}
418
ba5c1e9b
CO		 419static void __set_cpu_idle(struct kvm_vcpu *vcpu)
420{
ef8f4f49 421 kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT);
246b7218 422 set_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
ba5c1e9b
CO		 423}
424
425static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
426{
9daecfc6 427 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT);
246b7218 428 clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
ba5c1e9b
CO		 429}
430
431static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
432{
9daecfc6
DH		 433 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IO_INT | CPUSTAT_EXT_INT |
434 CPUSTAT_STOP_INT);
ba5c1e9b 435 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 436 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
437
438 if (guestdbg_enabled(vcpu)) {
439 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
440 LCTL_CR10 | LCTL_CR11);
441 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
442 }
ba5c1e9b
CO		 443}
444
6d3da241
JF		 445static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
446{
8846f317 447 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK))
6d3da241 448 return;
b7d45571 449 if (psw_ioint_disabled(vcpu))
2018224d 450 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT);
6d3da241
JF		 451 else
452 vcpu->arch.sie_block->lctl |= LCTL_CR6;
453}
454
383d0b05
JF		 455static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
456{
96723d32 457 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK))
383d0b05
JF		 458 return;
459 if (psw_extint_disabled(vcpu))
2018224d 460 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
383d0b05
JF		 461 else
462 vcpu->arch.sie_block->lctl |= LCTL_CR0;
463}
464
465static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
466{
96723d32 467 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK))
383d0b05
JF		 468 return;
469 if (psw_mchk_disabled(vcpu))
470 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
471 else
472 vcpu->arch.sie_block->lctl |= LCTL_CR14;
473}
474
6cddd432
DH		 475static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
476{
477 if (kvm_s390_is_stop_irq_pending(vcpu))
2018224d 478 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
6cddd432
DH		 479}
480
6d3da241
JF		 481/* Set interception request for non-deliverable interrupts */
482static void set_intercept_indicators(struct kvm_vcpu *vcpu)
383d0b05 483{
6d3da241 484 set_intercept_indicators_io(vcpu);
383d0b05
JF		 485 set_intercept_indicators_ext(vcpu);
486 set_intercept_indicators_mchk(vcpu);
6cddd432 487 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 488}
489
0fb97abe
JF		 490static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
491{
383d0b05 492 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
201ae986 493 int rc = 0;
0fb97abe 494
ccc40c53 495 vcpu->stat.deliver_cputm++;
0fb97abe
JF		 496 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
497 0, 0);
201ae986
MM		 498 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
499 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
500 vcpu->arch.sie_block->eic = EXT_IRQ_CPU_TIMER;
501 } else {
502 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
503 (u16 *)__LC_EXT_INT_CODE);
504 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
505 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
506 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
507 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
508 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
509 }
383d0b05 510 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 511 return rc ? -EFAULT : 0;
0fb97abe
JF		 512}
513
514static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
515{
383d0b05 516 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
201ae986 517 int rc = 0;
0fb97abe 518
ccc40c53 519 vcpu->stat.deliver_ckc++;
0fb97abe
JF		 520 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
521 0, 0);
201ae986
MM		 522 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
523 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
524 vcpu->arch.sie_block->eic = EXT_IRQ_CLK_COMP;
525 } else {
526 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
527 (u16 __user *)__LC_EXT_INT_CODE);
528 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
529 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
530 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
531 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
532 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
533 }
383d0b05 534 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 535 return rc ? -EFAULT : 0;
0fb97abe
JF		 536}
537
383d0b05 538static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 539{
383d0b05
JF		 540 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
541 struct kvm_s390_ext_info ext;
0fb97abe
JF		 542 int rc;
543
383d0b05
JF		 544 spin_lock(&li->lock);
545 ext = li->irq.ext;
546 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
547 li->irq.ext.ext_params2 = 0;
548 spin_unlock(&li->lock);
549
3f24ba15
CB		 550 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
551 ext.ext_params2);
0fb97abe
JF		 552 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
553 KVM_S390_INT_PFAULT_INIT,
383d0b05 554 0, ext.ext_params2);
0fb97abe
JF		 555
556 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
557 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
558 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
559 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
560 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
561 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 562 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 563 return rc ? -EFAULT : 0;
0fb97abe
JF		 564}
565
d6404ded
DH		 566static int __write_machine_check(struct kvm_vcpu *vcpu,
567 struct kvm_s390_mchk_info *mchk)
568{
569 unsigned long ext_sa_addr;
4e0b1ab7 570 unsigned long lc;
0319dae6 571 freg_t fprs[NUM_FPRS];
ff5dc149 572 union mci mci;
d6404ded
DH		 573 int rc;
574
201ae986
MM		 575 /*
576 * All other possible payload for a machine check (e.g. the register
577 * contents in the save area) will be handled by the ultravisor, as
578 * the hypervisor does not not have the needed information for
579 * protected guests.
580 */
581 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
582 vcpu->arch.sie_block->iictl = IICTL_CODE_MCHK;
583 vcpu->arch.sie_block->mcic = mchk->mcic;
584 vcpu->arch.sie_block->faddr = mchk->failing_storage_address;
585 vcpu->arch.sie_block->edc = mchk->ext_damage_code;
586 return 0;
587 }
588
ff5dc149 589 mci.val = mchk->mcic;
31d8b8d4 590 /* take care of lazy register loading */
0319dae6
DH		 591 save_fpu_regs();
592 save_access_regs(vcpu->run->s.regs.acrs);
80248559
CB		 593 if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
594 save_gs_cb(current->thread.gs_cb);
0319dae6 595
d6404ded 596 /* Extended save area */
916cda1a
MS		 597 rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,
598 sizeof(unsigned long));
4e0b1ab7
FZ		 599 /* Only bits 0 through 63-LC are used for address formation */
600 lc = ext_sa_addr & MCESA_LC_MASK;
601 if (test_kvm_facility(vcpu->kvm, 133)) {
602 switch (lc) {
603 case 0:
604 case 10:
605 ext_sa_addr &= ~0x3ffUL;
606 break;
607 case 11:
608 ext_sa_addr &= ~0x7ffUL;
609 break;
610 case 12:
611 ext_sa_addr &= ~0xfffUL;
612 break;
613 default:
614 ext_sa_addr = 0;
615 break;
616 }
617 } else {
618 ext_sa_addr &= ~0x3ffUL;
619 }
620
ff5dc149
DH		 621 if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
622 if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
623 512))
624 mci.vr = 0;
625 } else {
626 mci.vr = 0;
627 }
4e0b1ab7
FZ		 628 if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133)
629 && (lc == 11 || lc == 12)) {
630 if (write_guest_abs(vcpu, ext_sa_addr + 1024,
631 &vcpu->run->s.regs.gscb, 32))
632 mci.gs = 0;
633 } else {
634 mci.gs = 0;
635 }
d6404ded
DH		 636
637 /* General interruption information */
0319dae6 638 rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
d6404ded
DH		 639 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
640 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
641 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
642 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ff5dc149 643 rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);
d6404ded
DH		 644
645 /* Register-save areas */
0319dae6
DH		 646 if (MACHINE_HAS_VX) {
647 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
648 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
649 } else {
650 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA,
651 vcpu->run->s.regs.fprs, 128);
652 }
653 rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA,
654 vcpu->run->s.regs.gprs, 128);
655 rc |= put_guest_lc(vcpu, current->thread.fpu.fpc,
656 (u32 __user *) __LC_FP_CREG_SAVE_AREA);
657 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr,
658 (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA);
659 rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu),
660 (u64 __user *) __LC_CPU_TIMER_SAVE_AREA);
661 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8,
662 (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA);
663 rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA,
664 &vcpu->run->s.regs.acrs, 64);
665 rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA,
666 &vcpu->arch.sie_block->gcr, 128);
d6404ded
DH		 667
668 /* Extended interruption information */
8953fb08
DH		 669 rc |= put_guest_lc(vcpu, mchk->ext_damage_code,
670 (u32 __user *) __LC_EXT_DAMAGE_CODE);
d6404ded
DH		 671 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
672 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
673 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout,
674 sizeof(mchk->fixed_logout));
675 return rc ? -EFAULT : 0;
676}
677
383d0b05 678static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 679{
6d3da241 680 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
383d0b05 681 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
6d3da241 682 struct kvm_s390_mchk_info mchk = {};
6d3da241
JF		 683 int deliver = 0;
684 int rc = 0;
0fb97abe 685
6d3da241 686 spin_lock(&fi->lock);
383d0b05 687 spin_lock(&li->lock);
6d3da241
JF		 688 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
689 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
690 /*
691 * If there was an exigent machine check pending, then any
692 * repressible machine checks that might have been pending
693 * are indicated along with it, so always clear bits for
694 * repressible and exigent interrupts
695 */
696 mchk = li->irq.mchk;
697 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
698 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
699 memset(&li->irq.mchk, 0, sizeof(mchk));
700 deliver = 1;
701 }
383d0b05 702 /*
6d3da241
JF		 703 * We indicate floating repressible conditions along with
704 * other pending conditions. Channel Report Pending and Channel
705 * Subsystem damage are the only two and and are indicated by
706 * bits in mcic and masked in cr14.
383d0b05 707 */
6d3da241
JF		 708 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
709 mchk.mcic |= fi->mchk.mcic;
710 mchk.cr14 |= fi->mchk.cr14;
711 memset(&fi->mchk, 0, sizeof(mchk));
712 deliver = 1;
713 }
383d0b05 714 spin_unlock(&li->lock);
6d3da241 715 spin_unlock(&fi->lock);
383d0b05 716
6d3da241 717 if (deliver) {
3f24ba15 718 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
6d3da241
JF		 719 mchk.mcic);
720 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
721 KVM_S390_MCHK,
722 mchk.cr14, mchk.mcic);
32de0749 723 vcpu->stat.deliver_machine_check++;
d6404ded 724 rc = __write_machine_check(vcpu, &mchk);
6d3da241 725 }
d6404ded 726 return rc;
0fb97abe
JF		 727}
728
729static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
730{
383d0b05 731 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
201ae986 732 int rc = 0;
0fb97abe 733
3f24ba15 734 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
0fb97abe
JF		 735 vcpu->stat.deliver_restart_signal++;
736 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
737
201ae986
MM		 738 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
739 vcpu->arch.sie_block->iictl = IICTL_CODE_RESTART;
740 } else {
741 rc = write_guest_lc(vcpu,
742 offsetof(struct lowcore, restart_old_psw),
743 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
744 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw),
745 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
746 }
383d0b05 747 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 748 return rc ? -EFAULT : 0;
0fb97abe
JF		 749}
750
383d0b05 751static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 752{
383d0b05
JF		 753 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
754 struct kvm_s390_prefix_info prefix;
755
756 spin_lock(&li->lock);
757 prefix = li->irq.prefix;
758 li->irq.prefix.address = 0;
759 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
760 spin_unlock(&li->lock);
0fb97abe 761
0fb97abe
JF		 762 vcpu->stat.deliver_prefix_signal++;
763 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
764 KVM_S390_SIGP_SET_PREFIX,
383d0b05 765 prefix.address, 0);
0fb97abe 766
383d0b05 767 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 768 return 0;
769}
770
383d0b05 771static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 772{
383d0b05 773 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 774 int rc;
383d0b05
JF		 775 int cpu_addr;
776
777 spin_lock(&li->lock);
778 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
779 clear_bit(cpu_addr, li->sigp_emerg_pending);
780 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
781 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
782 spin_unlock(&li->lock);
0fb97abe 783
3f24ba15 784 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
0fb97abe 785 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 786 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
787 cpu_addr, 0);
201ae986
MM		 788 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
789 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
790 vcpu->arch.sie_block->eic = EXT_IRQ_EMERGENCY_SIG;
791 vcpu->arch.sie_block->extcpuaddr = cpu_addr;
792 return 0;
793 }
0fb97abe
JF		 794
795 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
796 (u16 *)__LC_EXT_INT_CODE);
383d0b05 797 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 798 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
799 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
800 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
801 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 802 return rc ? -EFAULT : 0;
0fb97abe
JF		 803}
804
383d0b05 805static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 806{
383d0b05
JF		 807 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
808 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 809 int rc;
810
383d0b05
JF		 811 spin_lock(&li->lock);
812 extcall = li->irq.extcall;
813 li->irq.extcall.code = 0;
814 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
815 spin_unlock(&li->lock);
816
3f24ba15 817 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
0fb97abe
JF		 818 vcpu->stat.deliver_external_call++;
819 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
820 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 821 extcall.code, 0);
201ae986
MM		 822 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
823 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
824 vcpu->arch.sie_block->eic = EXT_IRQ_EXTERNAL_CALL;
825 vcpu->arch.sie_block->extcpuaddr = extcall.code;
826 return 0;
827 }
0fb97abe
JF		 828
829 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
830 (u16 *)__LC_EXT_INT_CODE);
383d0b05 831 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 832 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
833 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
834 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
835 sizeof(psw_t));
99e20009 836 return rc ? -EFAULT : 0;
0fb97abe
JF		 837}
838
ea5c68c3
JF		 839static int __deliver_prog_pv(struct kvm_vcpu *vcpu, u16 code)
840{
841 switch (code) {
842 case PGM_SPECIFICATION:
843 vcpu->arch.sie_block->iictl = IICTL_CODE_SPECIFICATION;
844 break;
845 case PGM_OPERAND:
846 vcpu->arch.sie_block->iictl = IICTL_CODE_OPERAND;
847 break;
848 default:
849 return -EINVAL;
850 }
851 return 0;
852}
853
383d0b05 854static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 855{
383d0b05
JF		 856 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
857 struct kvm_s390_pgm_info pgm_info;
a9a846fd 858 int rc = 0, nullifying = false;
634790b8 859 u16 ilen;
8712836b 860
383d0b05
JF		 861 spin_lock(&li->lock);
862 pgm_info = li->irq.pgm;
863 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
864 memset(&li->irq.pgm, 0, sizeof(pgm_info));
865 spin_unlock(&li->lock);
866
634790b8 867 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
0e8bc06a
DH		 868 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
869 pgm_info.code, ilen);
ccc40c53 870 vcpu->stat.deliver_program++;
0fb97abe 871 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 872 pgm_info.code, 0);
0fb97abe 873
ea5c68c3
JF		 874 /* PER is handled by the ultravisor */
875 if (kvm_s390_pv_cpu_is_protected(vcpu))
876 return __deliver_prog_pv(vcpu, pgm_info.code & ~PGM_PER);
877
383d0b05 878 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 879 case PGM_AFX_TRANSLATION:
880 case PGM_ASX_TRANSLATION:
881 case PGM_EX_TRANSLATION:
882 case PGM_LFX_TRANSLATION:
883 case PGM_LSTE_SEQUENCE:
884 case PGM_LSX_TRANSLATION:
885 case PGM_LX_TRANSLATION:
886 case PGM_PRIMARY_AUTHORITY:
887 case PGM_SECONDARY_AUTHORITY:
a9a846fd 888 nullifying = true;
3b684a42 889 fallthrough;
8712836b 890 case PGM_SPACE_SWITCH:
383d0b05 891 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 892 (u64 *)__LC_TRANS_EXC_CODE);
893 break;
894 case PGM_ALEN_TRANSLATION:
895 case PGM_ALE_SEQUENCE:
896 case PGM_ASTE_INSTANCE:
897 case PGM_ASTE_SEQUENCE:
898 case PGM_ASTE_VALIDITY:
899 case PGM_EXTENDED_AUTHORITY:
383d0b05 900 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 901 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 902 nullifying = true;
8712836b
DH		 903 break;
904 case PGM_ASCE_TYPE:
905 case PGM_PAGE_TRANSLATION:
906 case PGM_REGION_FIRST_TRANS:
907 case PGM_REGION_SECOND_TRANS:
908 case PGM_REGION_THIRD_TRANS:
909 case PGM_SEGMENT_TRANSLATION:
383d0b05 910 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 911 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 912 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 913 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 914 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 915 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 916 nullifying = true;
8712836b
DH		 917 break;
918 case PGM_MONITOR:
383d0b05 919 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 920 (u16 *)__LC_MON_CLASS_NR);
383d0b05 921 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 922 (u64 *)__LC_MON_CODE);
923 break;
403c8648 924 case PGM_VECTOR_PROCESSING:
8712836b 925 case PGM_DATA:
383d0b05 926 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 927 (u32 *)__LC_DATA_EXC_CODE);
928 break;
929 case PGM_PROTECTION:
383d0b05 930 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 931 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 932 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 933 (u8 *)__LC_EXC_ACCESS_ID);
934 break;
a9a846fd
TH		 935 case PGM_STACK_FULL:
936 case PGM_STACK_EMPTY:
937 case PGM_STACK_SPECIFICATION:
938 case PGM_STACK_TYPE:
939 case PGM_STACK_OPERATION:
940 case PGM_TRACE_TABEL:
941 case PGM_CRYPTO_OPERATION:
942 nullifying = true;
943 break;
8712836b
DH		 944 }
945
383d0b05
JF		 946 if (pgm_info.code & PGM_PER) {
947 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 948 (u8 *) __LC_PER_CODE);
383d0b05 949 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 950 (u8 *)__LC_PER_ATMID);
383d0b05 951 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 952 (u64 *) __LC_PER_ADDRESS);
383d0b05 953 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 954 (u8 *) __LC_PER_ACCESS_ID);
955 }
956
eaa4f416 957 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND))
0e8bc06a 958 kvm_s390_rewind_psw(vcpu, ilen);
a9a846fd 959
0e8bc06a
DH		 960 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
961 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
2ba45968
DH		 962 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
963 (u64 *) __LC_LAST_BREAK);
383d0b05 964 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 965 (u16 *)__LC_PGM_INT_CODE);
966 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
967 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
968 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
969 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 970 return rc ? -EFAULT : 0;
0fb97abe
JF		 971}
972
0890ddea
CB		 973#define SCCB_MASK 0xFFFFFFF8
974#define SCCB_EVENT_PENDING 0x3
975
976static int write_sclp(struct kvm_vcpu *vcpu, u32 parm)
977{
978 int rc;
979
980 if (kvm_s390_pv_cpu_get_handle(vcpu)) {
981 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
982 vcpu->arch.sie_block->eic = EXT_IRQ_SERVICE_SIG;
983 vcpu->arch.sie_block->eiparams = parm;
984 return 0;
985 }
986
987 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
988 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
989 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
990 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
991 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
992 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
993 rc |= put_guest_lc(vcpu, parm,
994 (u32 *)__LC_EXT_PARAMS);
995
996 return rc ? -EFAULT : 0;
997}
998
6d3da241 999static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
0fb97abe 1000{
6d3da241
JF		 1001 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
1002 struct kvm_s390_ext_info ext;
6d3da241
JF		 1003
1004 spin_lock(&fi->lock);
0890ddea
CB		 1005 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs) ||
1006 !(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
6d3da241
JF		 1007 spin_unlock(&fi->lock);
1008 return 0;
1009 }
1010 ext = fi->srv_signal;
1011 memset(&fi->srv_signal, 0, sizeof(ext));
1012 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
0890ddea
CB		 1013 clear_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs);
1014 if (kvm_s390_pv_cpu_is_protected(vcpu))
1015 set_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs);
6d3da241 1016 spin_unlock(&fi->lock);
0fb97abe 1017
3f24ba15 1018 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
6d3da241 1019 ext.ext_params);
0fb97abe 1020 vcpu->stat.deliver_service_signal++;
6d3da241
JF		 1021 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
1022 ext.ext_params, 0);
0fb97abe 1023
0890ddea
CB		 1024 return write_sclp(vcpu, ext.ext_params);
1025}
6d3da241 1026
0890ddea
CB		 1027static int __must_check __deliver_service_ev(struct kvm_vcpu *vcpu)
1028{
1029 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
1030 struct kvm_s390_ext_info ext;
1031
1032 spin_lock(&fi->lock);
1033 if (!(test_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs))) {
1034 spin_unlock(&fi->lock);
1035 return 0;
1036 }
1037 ext = fi->srv_signal;
1038 /* only clear the event bit */
1039 fi->srv_signal.ext_params &= ~SCCB_EVENT_PENDING;
1040 clear_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs);
1041 spin_unlock(&fi->lock);
1042
1043 VCPU_EVENT(vcpu, 4, "%s", "deliver: sclp parameter event");
1044 vcpu->stat.deliver_service_signal++;
1045 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
1046 ext.ext_params, 0);
1047
1048 return write_sclp(vcpu, SCCB_EVENT_PENDING);
0fb97abe
JF		 1049}
1050
6d3da241 1051static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
0fb97abe 1052{
6d3da241
JF		 1053 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
1054 struct kvm_s390_interrupt_info *inti;
1055 int rc = 0;
0fb97abe 1056
6d3da241
JF		 1057 spin_lock(&fi->lock);
1058 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
1059 struct kvm_s390_interrupt_info,
1060 list);
1061 if (inti) {
6d3da241
JF		 1062 list_del(&inti->list);
1063 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
1064 }
1065 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
1066 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1067 spin_unlock(&fi->lock);
8712836b 1068
6d3da241 1069 if (inti) {
3f24ba15
CB		 1070 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1071 KVM_S390_INT_PFAULT_DONE, 0,
1072 inti->ext.ext_params2);
1073 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
1074 inti->ext.ext_params2);
1075
6d3da241
JF		 1076 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
1077 (u16 *)__LC_EXT_INT_CODE);
1078 rc |= put_guest_lc(vcpu, PFAULT_DONE,
1079 (u16 *)__LC_EXT_CPU_ADDR);
1080 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
1081 &vcpu->arch.sie_block->gpsw,
1082 sizeof(psw_t));
1083 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
1084 &vcpu->arch.sie_block->gpsw,
1085 sizeof(psw_t));
1086 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
1087 (u64 *)__LC_EXT_PARAMS2);
1088 kfree(inti);
1089 }
99e20009 1090 return rc ? -EFAULT : 0;
0fb97abe
JF		 1091}
1092
6d3da241 1093static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
0fb97abe 1094{
6d3da241
JF		 1095 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
1096 struct kvm_s390_interrupt_info *inti;
1097 int rc = 0;
0fb97abe 1098
6d3da241
JF		 1099 spin_lock(&fi->lock);
1100 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
1101 struct kvm_s390_interrupt_info,
1102 list);
1103 if (inti) {
1104 VCPU_EVENT(vcpu, 4,
3f24ba15 1105 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
6d3da241 1106 inti->ext.ext_params, inti->ext.ext_params2);
ccc40c53 1107 vcpu->stat.deliver_virtio++;
6d3da241
JF		 1108 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1109 inti->type,
1110 inti->ext.ext_params,
1111 inti->ext.ext_params2);
1112 list_del(&inti->list);
1113 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
1114 }
1115 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
1116 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1117 spin_unlock(&fi->lock);
0fb97abe 1118
6d3da241
JF		 1119 if (inti) {
1120 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
1121 (u16 *)__LC_EXT_INT_CODE);
1122 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
1123 (u16 *)__LC_EXT_CPU_ADDR);
1124 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
1125 &vcpu->arch.sie_block->gpsw,
1126 sizeof(psw_t));
1127 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
1128 &vcpu->arch.sie_block->gpsw,
1129 sizeof(psw_t));
1130 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
1131 (u32 *)__LC_EXT_PARAMS);
1132 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
1133 (u64 *)__LC_EXT_PARAMS2);
1134 kfree(inti);
1135 }
99e20009 1136 return rc ? -EFAULT : 0;
0fb97abe
JF		 1137}
1138
d7c5cb01
MM		 1139static int __do_deliver_io(struct kvm_vcpu *vcpu, struct kvm_s390_io_info *io)
1140{
1141 int rc;
1142
201ae986
MM		 1143 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
1144 vcpu->arch.sie_block->iictl = IICTL_CODE_IO;
1145 vcpu->arch.sie_block->subchannel_id = io->subchannel_id;
1146 vcpu->arch.sie_block->subchannel_nr = io->subchannel_nr;
1147 vcpu->arch.sie_block->io_int_parm = io->io_int_parm;
1148 vcpu->arch.sie_block->io_int_word = io->io_int_word;
1149 return 0;
1150 }
1151
d7c5cb01
MM		 1152 rc = put_guest_lc(vcpu, io->subchannel_id, (u16 *)__LC_SUBCHANNEL_ID);
1153 rc |= put_guest_lc(vcpu, io->subchannel_nr, (u16 *)__LC_SUBCHANNEL_NR);
1154 rc |= put_guest_lc(vcpu, io->io_int_parm, (u32 *)__LC_IO_INT_PARM);
1155 rc |= put_guest_lc(vcpu, io->io_int_word, (u32 *)__LC_IO_INT_WORD);
1156 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
1157 &vcpu->arch.sie_block->gpsw,
1158 sizeof(psw_t));
1159 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
1160 &vcpu->arch.sie_block->gpsw,
1161 sizeof(psw_t));
1162 return rc ? -EFAULT : 0;
1163}
1164
0fb97abe 1165static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
6d3da241 1166 unsigned long irq_type)
0fb97abe 1167{
6d3da241
JF		 1168 struct list_head *isc_list;
1169 struct kvm_s390_float_interrupt *fi;
982cff42 1170 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
6d3da241 1171 struct kvm_s390_interrupt_info *inti = NULL;
d7c5cb01
MM		 1172 struct kvm_s390_io_info io;
1173 u32 isc;
6d3da241 1174 int rc = 0;
0fb97abe 1175
6d3da241 1176 fi = &vcpu->kvm->arch.float_int;
8712836b 1177
6d3da241 1178 spin_lock(&fi->lock);
d7c5cb01
MM		 1179 isc = irq_type_to_isc(irq_type);
1180 isc_list = &fi->lists[isc];
6d3da241
JF		 1181 inti = list_first_entry_or_null(isc_list,
1182 struct kvm_s390_interrupt_info,
1183 list);
1184 if (inti) {
dcc98ea6
CB		 1185 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1186 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)");
1187 else
1188 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x",
1189 inti->io.subchannel_id >> 8,
1190 inti->io.subchannel_id >> 1 & 0x3,
1191 inti->io.subchannel_nr);
1192
ccc40c53 1193 vcpu->stat.deliver_io++;
6d3da241
JF		 1194 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1195 inti->type,
1196 ((__u32)inti->io.subchannel_id << 16) |
1197 inti->io.subchannel_nr,
1198 ((__u64)inti->io.io_int_parm << 32) |
1199 inti->io.io_int_word);
1200 list_del(&inti->list);
1201 fi->counters[FIRQ_CNTR_IO] -= 1;
1202 }
1203 if (list_empty(isc_list))
1204 clear_bit(irq_type, &fi->pending_irqs);
1205 spin_unlock(&fi->lock);
1206
1207 if (inti) {
d7c5cb01 1208 rc = __do_deliver_io(vcpu, &(inti->io));
6d3da241 1209 kfree(inti);
d7c5cb01 1210 goto out;
6d3da241 1211 }
383d0b05 1212
982cff42 1213 if (gi->origin && gisa_tac_ipm_gisc(gi->origin, isc)) {
d7c5cb01
MM		 1214 /*
1215 * in case an adapter interrupt was not delivered
1216 * in SIE context KVM will handle the delivery
1217 */
1218 VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc);
1219 memset(&io, 0, sizeof(io));
2496c8e7 1220 io.io_int_word = isc_to_int_word(isc);
ccc40c53 1221 vcpu->stat.deliver_io++;
d7c5cb01
MM		 1222 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1223 KVM_S390_INT_IO(1, 0, 0, 0),
1224 ((__u32)io.subchannel_id << 16) |
1225 io.subchannel_nr,
1226 ((__u64)io.io_int_parm << 32) |
1227 io.io_int_word);
1228 rc = __do_deliver_io(vcpu, &io);
1229 }
1230out:
1231 return rc;
383d0b05
JF		 1232}
1233
ea5f4969
DH		 1234/* Check whether an external call is pending (deliverable or not) */
1235int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 1236{
ea5f4969 1237 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
4953919f 1238
37c5f6c8 1239 if (!sclp.has_sigpif)
ea5f4969 1240 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 1241
a5bd7647 1242 return sca_ext_call_pending(vcpu, NULL);
4953919f
DH		 1243}
1244
9a022067 1245int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 1246{
4d32ad6b
DH		 1247 if (deliverable_irqs(vcpu))
1248 return 1;
ba5c1e9b 1249
4d32ad6b
DH		 1250 if (kvm_cpu_has_pending_timer(vcpu))
1251 return 1;
ba5c1e9b 1252
ea5f4969 1253 /* external call pending and deliverable */
4d32ad6b 1254 if (kvm_s390_ext_call_pending(vcpu) &&
ea5f4969 1255 !psw_extint_disabled(vcpu) &&
b9224cd7 1256 (vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK))
4d32ad6b 1257 return 1;
4953919f 1258
4d32ad6b
DH		 1259 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
1260 return 1;
1261 return 0;
ba5c1e9b
CO		 1262}
1263
3d80840d
MT		 1264int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1265{
b4aec925 1266 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
3d80840d
MT		 1267}
1268
b3c17f10
DH		 1269static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
1270{
5fe01793
DH		 1271 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
1272 const u64 ckc = vcpu->arch.sie_block->ckc;
1273 u64 cputm, sltime = 0;
b3c17f10
DH		 1274
1275 if (ckc_interrupts_enabled(vcpu)) {
b9224cd7 1276 if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) {
5fe01793
DH		 1277 if ((s64)now < (s64)ckc)
1278 sltime = tod_to_ns((s64)ckc - (s64)now);
1279 } else if (now < ckc) {
1280 sltime = tod_to_ns(ckc - now);
1281 }
1282 /* already expired */
1283 if (!sltime)
b3c17f10
DH		 1284 return 0;
1285 if (cpu_timer_interrupts_enabled(vcpu)) {
1286 cputm = kvm_s390_get_cpu_timer(vcpu);
1287 /* already expired? */
1288 if (cputm >> 63)
1289 return 0;
1290 return min(sltime, tod_to_ns(cputm));
1291 }
1292 } else if (cpu_timer_interrupts_enabled(vcpu)) {
1293 sltime = kvm_s390_get_cpu_timer(vcpu);
1294 /* already expired? */
1295 if (sltime >> 63)
1296 return 0;
1297 }
1298 return sltime;
1299}
1300
ba5c1e9b
CO		 1301int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
1302{
9f30f621 1303 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
b3c17f10 1304 u64 sltime;
ba5c1e9b
CO		 1305
1306 vcpu->stat.exit_wait_state++;
ba5c1e9b 1307
0759d068 1308 /* fast path */
118b862b 1309 if (kvm_arch_vcpu_runnable(vcpu))
0759d068 1310 return 0;
e52b2af5 1311
ba5c1e9b
CO		 1312 if (psw_interrupts_disabled(vcpu)) {
1313 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 1314 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 1315 }
1316
9f30f621
MM		 1317 if (gi->origin &&
1318 (gisa_get_ipm_or_restore_iam(gi) &
1319 vcpu->arch.sie_block->gcr[6] >> 24))
1320 return 0;
1321
b3c17f10
DH		 1322 if (!ckc_interrupts_enabled(vcpu) &&
1323 !cpu_timer_interrupts_enabled(vcpu)) {
ba5c1e9b 1324 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 1325 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 1326 goto no_timer;
1327 }
1328
b3c17f10
DH		 1329 sltime = __calculate_sltime(vcpu);
1330 if (!sltime)
bda343ef
DH		 1331 return 0;
1332
1333 __set_cpu_idle(vcpu);
8b0e1953 1334 hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL);
b3c17f10 1335 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
ba5c1e9b 1336no_timer:
800c1065 1337 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 1338 kvm_vcpu_block(vcpu);
ba5c1e9b 1339 __unset_cpu_idle(vcpu);
800c1065
TH		 1340 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1341
2d00f759 1342 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 1343 return 0;
1344}
1345
0e9c85a5
DH		 1346void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
1347{
3491caf2 1348 vcpu->valid_wakeup = true;
d9847409
WL		 1349 kvm_vcpu_wake_up(vcpu);
1350
72e1ad42 1351 /*
d9847409 1352 * The VCPU might not be sleeping but rather executing VSIE. Let's
adbf1698
DH		 1353 * kick it, so it leaves the SIE to process the request.
1354 */
1355 kvm_s390_vsie_kick(vcpu);
0e9c85a5
DH		 1356}
1357
ca872302
CB		 1358enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
1359{
1360 struct kvm_vcpu *vcpu;
b3c17f10 1361 u64 sltime;
ca872302
CB		 1362
1363 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
b3c17f10 1364 sltime = __calculate_sltime(vcpu);
ca872302 1365
2d00f759
DH		 1366 /*
1367 * If the monotonic clock runs faster than the tod clock we might be
1368 * woken up too early and have to go back to sleep to avoid deadlocks.
1369 */
b3c17f10 1370 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime)))
2d00f759
DH		 1371 return HRTIMER_RESTART;
1372 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 1373 return HRTIMER_NORESTART;
1374}
ba5c1e9b 1375
2ed10cc1
JF		 1376void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
1377{
1378 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 1379
4ae3c081 1380 spin_lock(&li->lock);
383d0b05
JF		 1381 li->pending_irqs = 0;
1382 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
1383 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 1384 spin_unlock(&li->lock);
4953919f 1385
a5bd7647 1386 sca_clear_ext_call(vcpu);
2ed10cc1
JF		 1387}
1388
614aeab4 1389int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 1390{
180c12fb 1391 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
79395031 1392 int rc = 0;
383d0b05 1393 unsigned long irq_type;
6d3da241 1394 unsigned long irqs;
ba5c1e9b
CO		 1395
1396 __reset_intercept_indicators(vcpu);
ba5c1e9b 1397
383d0b05
JF		 1398 /* pending ckc conditions might have been invalidated */
1399 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
b4aec925 1400 if (ckc_irq_pending(vcpu))
383d0b05
JF		 1401 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1402
b4aec925
DH		 1403 /* pending cpu timer conditions might have been invalidated */
1404 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1405 if (cpu_timer_irq_pending(vcpu))
1406 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1407
ffeca0ae 1408 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
c7901a6e
MM		 1409 /* bits are in the reverse order of interrupt priority */
1410 irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT);
baabee67
DH		 1411 switch (irq_type) {
1412 case IRQ_PEND_IO_ISC_0:
1413 case IRQ_PEND_IO_ISC_1:
1414 case IRQ_PEND_IO_ISC_2:
1415 case IRQ_PEND_IO_ISC_3:
1416 case IRQ_PEND_IO_ISC_4:
1417 case IRQ_PEND_IO_ISC_5:
1418 case IRQ_PEND_IO_ISC_6:
1419 case IRQ_PEND_IO_ISC_7:
6d3da241 1420 rc = __deliver_io(vcpu, irq_type);
baabee67
DH		 1421 break;
1422 case IRQ_PEND_MCHK_EX:
1423 case IRQ_PEND_MCHK_REP:
1424 rc = __deliver_machine_check(vcpu);
1425 break;
1426 case IRQ_PEND_PROG:
1427 rc = __deliver_prog(vcpu);
1428 break;
1429 case IRQ_PEND_EXT_EMERGENCY:
1430 rc = __deliver_emergency_signal(vcpu);
1431 break;
1432 case IRQ_PEND_EXT_EXTERNAL:
1433 rc = __deliver_external_call(vcpu);
1434 break;
1435 case IRQ_PEND_EXT_CLOCK_COMP:
1436 rc = __deliver_ckc(vcpu);
1437 break;
1438 case IRQ_PEND_EXT_CPU_TIMER:
1439 rc = __deliver_cpu_timer(vcpu);
1440 break;
1441 case IRQ_PEND_RESTART:
1442 rc = __deliver_restart(vcpu);
1443 break;
1444 case IRQ_PEND_SET_PREFIX:
1445 rc = __deliver_set_prefix(vcpu);
1446 break;
1447 case IRQ_PEND_PFAULT_INIT:
1448 rc = __deliver_pfault_init(vcpu);
1449 break;
1450 case IRQ_PEND_EXT_SERVICE:
1451 rc = __deliver_service(vcpu);
1452 break;
0890ddea
CB		 1453 case IRQ_PEND_EXT_SERVICE_EV:
1454 rc = __deliver_service_ev(vcpu);
1455 break;
baabee67
DH		 1456 case IRQ_PEND_PFAULT_DONE:
1457 rc = __deliver_pfault_done(vcpu);
1458 break;
1459 case IRQ_PEND_VIRTIO:
1460 rc = __deliver_virtio(vcpu);
1461 break;
1462 default:
1463 WARN_ONCE(1, "Unknown pending irq type %ld", irq_type);
1464 clear_bit(irq_type, &li->pending_irqs);
383d0b05 1465 }
ffeca0ae 1466 }
383d0b05 1467
6d3da241 1468 set_intercept_indicators(vcpu);
79395031
JF		 1469
1470 return rc;
ba5c1e9b
CO		 1471}
1472
383d0b05 1473static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1474{
1475 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1476
ccc40c53 1477 vcpu->stat.inject_program++;
ed2afcfa
DH		 1478 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1479 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1480 irq->u.pgm.code, 0);
1481
634790b8
DH		 1482 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) {
1483 /* auto detection if no valid ILC was given */
1484 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK;
1485 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu);
1486 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID;
1487 }
1488
238293b1
DH		 1489 if (irq->u.pgm.code == PGM_PER) {
1490 li->irq.pgm.code |= PGM_PER;
634790b8 1491 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1492 /* only modify PER related information */
1493 li->irq.pgm.per_address = irq->u.pgm.per_address;
1494 li->irq.pgm.per_code = irq->u.pgm.per_code;
1495 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1496 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1497 } else if (!(irq->u.pgm.code & PGM_PER)) {
1498 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1499 irq->u.pgm.code;
634790b8 1500 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1501 /* only modify non-PER information */
1502 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1503 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1504 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1505 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1506 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1507 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1508 } else {
1509 li->irq.pgm = irq->u.pgm;
1510 }
9185124e 1511 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 1512 return 0;
1513}
1514
383d0b05 1515static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1516{
1517 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1518
ccc40c53 1519 vcpu->stat.inject_pfault_init++;
3f24ba15
CB		 1520 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1521 irq->u.ext.ext_params2);
383d0b05
JF		 1522 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1523 irq->u.ext.ext_params,
ed2afcfa 1524 irq->u.ext.ext_params2);
383d0b05
JF		 1525
1526 li->irq.ext = irq->u.ext;
1527 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
2018224d 1528 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1529 return 0;
1530}
1531
0675d92d 1532static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1533{
1534 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1535 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1536 uint16_t src_id = irq->u.extcall.code;
0146a7b0 1537
ccc40c53 1538 vcpu->stat.inject_external_call++;
3f24ba15 1539 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
ea5f4969 1540 src_id);
383d0b05 1541 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ed2afcfa 1542 src_id, 0);
ea5f4969
DH		 1543
1544 /* sending vcpu invalid */
152e9f65 1545 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
ea5f4969
DH		 1546 return -EINVAL;
1547
201ae986 1548 if (sclp.has_sigpif && !kvm_s390_pv_cpu_get_handle(vcpu))
a5bd7647 1549 return sca_inject_ext_call(vcpu, src_id);
383d0b05 1550
b938eace 1551 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
ea5f4969 1552 return -EBUSY;
383d0b05 1553 *extcall = irq->u.extcall;
2018224d 1554 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1555 return 0;
1556}
1557
383d0b05 1558static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1559{
1560 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1561 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0 1562
ccc40c53 1563 vcpu->stat.inject_set_prefix++;
ed2afcfa 1564 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
556cc0da 1565 irq->u.prefix.address);
383d0b05 1566 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
ed2afcfa 1567 irq->u.prefix.address, 0);
383d0b05 1568
a3a9c59a
DH		 1569 if (!is_vcpu_stopped(vcpu))
1570 return -EBUSY;
1571
383d0b05
JF		 1572 *prefix = irq->u.prefix;
1573 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1574 return 0;
1575}
1576
6cddd432 1577#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1578static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1579{
1580 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1581 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1582 int rc = 0;
0146a7b0 1583
ccc40c53 1584 vcpu->stat.inject_stop_signal++;
ed2afcfa 1585 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
383d0b05 1586
2822545f
DH		 1587 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1588 return -EINVAL;
1589
6cddd432
DH		 1590 if (is_vcpu_stopped(vcpu)) {
1591 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1592 rc = kvm_s390_store_status_unloaded(vcpu,
1593 KVM_S390_STORE_STATUS_NOADDR);
1594 return rc;
1595 }
1596
1597 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1598 return -EBUSY;
2822545f 1599 stop->flags = irq->u.stop.flags;
2018224d 1600 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1601 return 0;
1602}
1603
7775cbaa 1604static int __inject_sigp_restart(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1605{
1606 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1607
ccc40c53 1608 vcpu->stat.inject_restart++;
3f24ba15 1609 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
ed2afcfa 1610 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
383d0b05
JF		 1611
1612 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1613 return 0;
1614}
1615
1616static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1617 struct kvm_s390_irq *irq)
0146a7b0
JF		 1618{
1619 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1620
ccc40c53 1621 vcpu->stat.inject_emergency_signal++;
3f24ba15 1622 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
383d0b05
JF		 1623 irq->u.emerg.code);
1624 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
ed2afcfa 1625 irq->u.emerg.code, 0);
383d0b05 1626
b85de33a
DH		 1627 /* sending vcpu invalid */
1628 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1629 return -EINVAL;
1630
49538d12 1631 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1632 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
2018224d 1633 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1634 return 0;
1635}
1636
383d0b05 1637static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1638{
1639 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1640 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0 1641
ccc40c53 1642 vcpu->stat.inject_mchk++;
3f24ba15 1643 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
556cc0da 1644 irq->u.mchk.mcic);
383d0b05 1645 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
ed2afcfa 1646 irq->u.mchk.mcic);
383d0b05
JF		 1647
1648 /*
fc2020cf
JF		 1649 * Because repressible machine checks can be indicated along with
1650 * exigent machine checks (PoP, Chapter 11, Interruption action)
1651 * we need to combine cr14, mcic and external damage code.
1652 * Failing storage address and the logout area should not be or'ed
1653 * together, we just indicate the last occurrence of the corresponding
1654 * machine check
383d0b05 1655 */
fc2020cf 1656 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1657 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1658 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1659 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1660 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1661 sizeof(mchk->fixed_logout));
383d0b05
JF		 1662 if (mchk->mcic & MCHK_EX_MASK)
1663 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1664 else if (mchk->mcic & MCHK_REP_MASK)
1665 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1666 return 0;
1667}
1668
383d0b05 1669static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1670{
1671 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1672
ccc40c53 1673 vcpu->stat.inject_ckc++;
3f24ba15 1674 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
383d0b05 1675 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
ed2afcfa 1676 0, 0);
383d0b05
JF		 1677
1678 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
2018224d 1679 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1680 return 0;
1681}
1682
383d0b05 1683static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1684{
1685 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1686
ccc40c53 1687 vcpu->stat.inject_cputm++;
3f24ba15 1688 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
383d0b05 1689 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
ed2afcfa 1690 0, 0);
383d0b05
JF		 1691
1692 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
2018224d 1693 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
ba5c1e9b
CO		 1694 return 0;
1695}
1696
6d3da241
JF		 1697static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1698 int isc, u32 schid)
1699{
1700 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1701 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1702 struct kvm_s390_interrupt_info *iter;
1703 u16 id = (schid & 0xffff0000U) >> 16;
1704 u16 nr = schid & 0x0000ffffU;
1705
1706 spin_lock(&fi->lock);
1707 list_for_each_entry(iter, isc_list, list) {
1708 if (schid && (id != iter->io.subchannel_id ||
1709 nr != iter->io.subchannel_nr))
1710 continue;
1711 /* found an appropriate entry */
1712 list_del_init(&iter->list);
1713 fi->counters[FIRQ_CNTR_IO] -= 1;
1714 if (list_empty(isc_list))
ee739f4b 1715 clear_bit(isc_to_irq_type(isc), &fi->pending_irqs);
6d3da241
JF		 1716 spin_unlock(&fi->lock);
1717 return iter;
1718 }
1719 spin_unlock(&fi->lock);
1720 return NULL;
1721}
383d0b05 1722
4b35f65e
MM		 1723static struct kvm_s390_interrupt_info *get_top_io_int(struct kvm *kvm,
1724 u64 isc_mask, u32 schid)
1725{
1726 struct kvm_s390_interrupt_info *inti = NULL;
1727 int isc;
1728
1729 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1730 if (isc_mask & isc_to_isc_bits(isc))
1731 inti = get_io_int(kvm, isc, schid);
1732 }
1733 return inti;
1734}
1735
1736static int get_top_gisa_isc(struct kvm *kvm, u64 isc_mask, u32 schid)
1737{
982cff42 1738 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
4b35f65e
MM		 1739 unsigned long active_mask;
1740 int isc;
1741
1742 if (schid)
1743 goto out;
982cff42 1744 if (!gi->origin)
4b35f65e
MM		 1745 goto out;
1746
982cff42 1747 active_mask = (isc_mask & gisa_get_ipm(gi->origin) << 24) << 32;
4b35f65e
MM		 1748 while (active_mask) {
1749 isc = __fls(active_mask) ^ (BITS_PER_LONG - 1);
982cff42 1750 if (gisa_tac_ipm_gisc(gi->origin, isc))
4b35f65e
MM		 1751 return isc;
1752 clear_bit_inv(isc, &active_mask);
1753 }
1754out:
1755 return -EINVAL;
1756}
1757
6d3da241
JF		 1758/*
1759 * Dequeue and return an I/O interrupt matching any of the interruption
1760 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
4b35f65e
MM		 1761 * Take into account the interrupts pending in the interrupt list and in GISA.
1762 *
1763 * Note that for a guest that does not enable I/O interrupts
1764 * but relies on TPI, a flood of classic interrupts may starve
1765 * out adapter interrupts on the same isc. Linux does not do
1766 * that, and it is possible to work around the issue by configuring
1767 * different iscs for classic and adapter interrupts in the guest,
1768 * but we may want to revisit this in the future.
6d3da241 1769 */
fa6b7fe9 1770struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241
JF		 1771 u64 isc_mask, u32 schid)
1772{
982cff42 1773 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
4b35f65e 1774 struct kvm_s390_interrupt_info *inti, *tmp_inti;
6d3da241
JF		 1775 int isc;
1776
4b35f65e
MM		 1777 inti = get_top_io_int(kvm, isc_mask, schid);
1778
1779 isc = get_top_gisa_isc(kvm, isc_mask, schid);
1780 if (isc < 0)
1781 /* no AI in GISA */
1782 goto out;
1783
1784 if (!inti)
1785 /* AI in GISA but no classical IO int */
1786 goto gisa_out;
1787
1788 /* both types of interrupts present */
1789 if (int_word_to_isc(inti->io.io_int_word) <= isc) {
1790 /* classical IO int with higher priority */
982cff42 1791 gisa_set_ipm_gisc(gi->origin, isc);
4b35f65e 1792 goto out;
6d3da241 1793 }
4b35f65e
MM		 1794gisa_out:
1795 tmp_inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1796 if (tmp_inti) {
1797 tmp_inti->type = KVM_S390_INT_IO(1, 0, 0, 0);
1798 tmp_inti->io.io_int_word = isc_to_int_word(isc);
1799 if (inti)
1800 kvm_s390_reinject_io_int(kvm, inti);
1801 inti = tmp_inti;
1802 } else
982cff42 1803 gisa_set_ipm_gisc(gi->origin, isc);
4b35f65e 1804out:
6d3da241
JF		 1805 return inti;
1806}
1807
6d3da241
JF		 1808static int __inject_service(struct kvm *kvm,
1809 struct kvm_s390_interrupt_info *inti)
1810{
1811 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1812
ccc40c53 1813 kvm->stat.inject_service_signal++;
6d3da241
JF		 1814 spin_lock(&fi->lock);
1815 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
0890ddea
CB		 1816
1817 /* We always allow events, track them separately from the sccb ints */
1818 if (fi->srv_signal.ext_params & SCCB_EVENT_PENDING)
1819 set_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs);
1820
6d3da241
JF		 1821 /*
1822 * Early versions of the QEMU s390 bios will inject several
1823 * service interrupts after another without handling a
1824 * condition code indicating busy.
1825 * We will silently ignore those superfluous sccb values.
1826 * A future version of QEMU will take care of serialization
1827 * of servc requests
1828 */
1829 if (fi->srv_signal.ext_params & SCCB_MASK)
1830 goto out;
1831 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1832 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1833out:
1834 spin_unlock(&fi->lock);
1835 kfree(inti);
1836 return 0;
1837}
1838
1839static int __inject_virtio(struct kvm *kvm,
1840 struct kvm_s390_interrupt_info *inti)
1841{
1842 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1843
ccc40c53 1844 kvm->stat.inject_virtio++;
6d3da241
JF		 1845 spin_lock(&fi->lock);
1846 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1847 spin_unlock(&fi->lock);
1848 return -EBUSY;
1849 }
1850 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1851 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1852 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1853 spin_unlock(&fi->lock);
1854 return 0;
1855}
1856
1857static int __inject_pfault_done(struct kvm *kvm,
1858 struct kvm_s390_interrupt_info *inti)
1859{
1860 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1861
ccc40c53 1862 kvm->stat.inject_pfault_done++;
6d3da241
JF		 1863 spin_lock(&fi->lock);
1864 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1865 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1866 spin_unlock(&fi->lock);
1867 return -EBUSY;
1868 }
1869 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1870 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1871 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1872 spin_unlock(&fi->lock);
1873 return 0;
1874}
1875
1876#define CR_PENDING_SUBCLASS 28
1877static int __inject_float_mchk(struct kvm *kvm,
1878 struct kvm_s390_interrupt_info *inti)
1879{
1880 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1881
ccc40c53 1882 kvm->stat.inject_float_mchk++;
6d3da241
JF		 1883 spin_lock(&fi->lock);
1884 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1885 fi->mchk.mcic |= inti->mchk.mcic;
1886 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1887 spin_unlock(&fi->lock);
1888 kfree(inti);
1889 return 0;
1890}
1891
1892static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
fa6b7fe9 1893{
982cff42 1894 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
fa6b7fe9 1895 struct kvm_s390_float_interrupt *fi;
6d3da241
JF		 1896 struct list_head *list;
1897 int isc;
fa6b7fe9 1898
ccc40c53 1899 kvm->stat.inject_io++;
d7c5cb01
MM		 1900 isc = int_word_to_isc(inti->io.io_int_word);
1901
201ae986
MM		 1902 /*
1903 * Do not make use of gisa in protected mode. We do not use the lock
1904 * checking variant as this is just a performance optimization and we
1905 * do not hold the lock here. This is ok as the code will pick
1906 * interrupts from both "lists" for delivery.
1907 */
1908 if (!kvm_s390_pv_get_handle(kvm) &&
1909 gi->origin && inti->type & KVM_S390_INT_IO_AI_MASK) {
d7c5cb01 1910 VM_EVENT(kvm, 4, "%s isc %1u", "inject: I/O (AI/gisa)", isc);
982cff42 1911 gisa_set_ipm_gisc(gi->origin, isc);
d7c5cb01
MM		 1912 kfree(inti);
1913 return 0;
1914 }
1915
fa6b7fe9
CH		 1916 fi = &kvm->arch.float_int;
1917 spin_lock(&fi->lock);
6d3da241
JF		 1918 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1919 spin_unlock(&fi->lock);
1920 return -EBUSY;
a91b8ebe 1921 }
6d3da241
JF		 1922 fi->counters[FIRQ_CNTR_IO] += 1;
1923
dcc98ea6
CB		 1924 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1925 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)");
1926 else
1927 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x",
1928 inti->io.subchannel_id >> 8,
1929 inti->io.subchannel_id >> 1 & 0x3,
1930 inti->io.subchannel_nr);
6d3da241
JF		 1931 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1932 list_add_tail(&inti->list, list);
ee739f4b 1933 set_bit(isc_to_irq_type(isc), &fi->pending_irqs);
fa6b7fe9 1934 spin_unlock(&fi->lock);
6d3da241 1935 return 0;
fa6b7fe9 1936}
ba5c1e9b 1937
96e0ed23
DH		 1938/*
1939 * Find a destination VCPU for a floating irq and kick it.
1940 */
1941static void __floating_irq_kick(struct kvm *kvm, u64 type)
ba5c1e9b 1942{
96e0ed23
DH		 1943 struct kvm_vcpu *dst_vcpu;
1944 int sigcpu, online_vcpus, nr_tries = 0;
1945
1946 online_vcpus = atomic_read(&kvm->online_vcpus);
1947 if (!online_vcpus)
1948 return;
1949
1950 /* find idle VCPUs first, then round robin */
246b7218 1951 sigcpu = find_first_bit(kvm->arch.idle_mask, online_vcpus);
96e0ed23
DH		 1952 if (sigcpu == online_vcpus) {
1953 do {
246b7218
MM		 1954 sigcpu = kvm->arch.float_int.next_rr_cpu++;
1955 kvm->arch.float_int.next_rr_cpu %= online_vcpus;
96e0ed23
DH		 1956 /* avoid endless loops if all vcpus are stopped */
1957 if (nr_tries++ >= online_vcpus)
1958 return;
1959 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1960 }
1961 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1962
1963 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
96e0ed23
DH		 1964 switch (type) {
1965 case KVM_S390_MCHK:
2018224d 1966 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT);
96e0ed23
DH		 1967 break;
1968 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
982cff42 1969 if (!(type & KVM_S390_INT_IO_AI_MASK &&
201ae986
MM		 1970 kvm->arch.gisa_int.origin) ||
1971 kvm_s390_pv_cpu_get_handle(dst_vcpu))
a9810327 1972 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT);
96e0ed23
DH		 1973 break;
1974 default:
2018224d 1975 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT);
96e0ed23
DH		 1976 break;
1977 }
96e0ed23
DH		 1978 kvm_s390_vcpu_wakeup(dst_vcpu);
1979}
1980
1981static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1982{
6d3da241
JF		 1983 u64 type = READ_ONCE(inti->type);
1984 int rc;
ba5c1e9b 1985
6d3da241
JF		 1986 switch (type) {
1987 case KVM_S390_MCHK:
1988 rc = __inject_float_mchk(kvm, inti);
1989 break;
1990 case KVM_S390_INT_VIRTIO:
1991 rc = __inject_virtio(kvm, inti);
1992 break;
1993 case KVM_S390_INT_SERVICE:
1994 rc = __inject_service(kvm, inti);
1995 break;
1996 case KVM_S390_INT_PFAULT_DONE:
1997 rc = __inject_pfault_done(kvm, inti);
1998 break;
1999 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
2000 rc = __inject_io(kvm, inti);
2001 break;
2002 default:
a91b8ebe 2003 rc = -EINVAL;
c05c4186 2004 }
6d3da241
JF		 2005 if (rc)
2006 return rc;
2007
96e0ed23 2008 __floating_irq_kick(kvm, type);
6d3da241 2009 return 0;
c05c4186
JF		 2010}
2011
2012int kvm_s390_inject_vm(struct kvm *kvm,
2013 struct kvm_s390_interrupt *s390int)
2014{
2015 struct kvm_s390_interrupt_info *inti;
428d53be 2016 int rc;
c05c4186 2017
ba5c1e9b
CO		 2018 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
2019 if (!inti)
2020 return -ENOMEM;
2021
c05c4186
JF		 2022 inti->type = s390int->type;
2023 switch (inti->type) {
ba5c1e9b 2024 case KVM_S390_INT_VIRTIO:
33e19115 2025 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 2026 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 2027 inti->ext.ext_params = s390int->parm;
2028 inti->ext.ext_params2 = s390int->parm64;
2029 break;
2030 case KVM_S390_INT_SERVICE:
3f24ba15 2031 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 2032 inti->ext.ext_params = s390int->parm;
2033 break;
3c038e6b 2034 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 2035 inti->ext.ext_params2 = s390int->parm64;
2036 break;
48a3e950 2037 case KVM_S390_MCHK:
3f24ba15 2038 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
48a3e950 2039 s390int->parm64);
48a3e950
CH		 2040 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
2041 inti->mchk.mcic = s390int->parm64;
2042 break;
d8346b7d 2043 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
d8346b7d
CH		 2044 inti->io.subchannel_id = s390int->parm >> 16;
2045 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
2046 inti->io.io_int_parm = s390int->parm64 >> 32;
2047 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
2048 break;
ba5c1e9b
CO		 2049 default:
2050 kfree(inti);
2051 return -EINVAL;
2052 }
ade38c31
CH		 2053 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
2054 2);
ba5c1e9b 2055
428d53be
DH		 2056 rc = __inject_vm(kvm, inti);
2057 if (rc)
2058 kfree(inti);
2059 return rc;
ba5c1e9b
CO		 2060}
2061
15462e37 2062int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 2063 struct kvm_s390_interrupt_info *inti)
2064{
15462e37 2065 return __inject_vm(kvm, inti);
2f32d4ea
CH		 2066}
2067
383d0b05
JF		 2068int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
2069 struct kvm_s390_irq *irq)
2070{
2071 irq->type = s390int->type;
2072 switch (irq->type) {
2073 case KVM_S390_PROGRAM_INT:
2074 if (s390int->parm & 0xffff0000)
2075 return -EINVAL;
2076 irq->u.pgm.code = s390int->parm;
2077 break;
2078 case KVM_S390_SIGP_SET_PREFIX:
2079 irq->u.prefix.address = s390int->parm;
2080 break;
2822545f
DH		 2081 case KVM_S390_SIGP_STOP:
2082 irq->u.stop.flags = s390int->parm;
2083 break;
383d0b05 2084 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 2085 if (s390int->parm & 0xffff0000)
383d0b05
JF		 2086 return -EINVAL;
2087 irq->u.extcall.code = s390int->parm;
2088 break;
2089 case KVM_S390_INT_EMERGENCY:
94d1f564 2090 if (s390int->parm & 0xffff0000)
383d0b05
JF		 2091 return -EINVAL;
2092 irq->u.emerg.code = s390int->parm;
2093 break;
2094 case KVM_S390_MCHK:
2095 irq->u.mchk.mcic = s390int->parm64;
2096 break;
53936b5b
TH		 2097 case KVM_S390_INT_PFAULT_INIT:
2098 irq->u.ext.ext_params = s390int->parm;
2099 irq->u.ext.ext_params2 = s390int->parm64;
2100 break;
2101 case KVM_S390_RESTART:
2102 case KVM_S390_INT_CLOCK_COMP:
2103 case KVM_S390_INT_CPU_TIMER:
2104 break;
2105 default:
2106 return -EINVAL;
383d0b05
JF		 2107 }
2108 return 0;
2109}
2110
6cddd432
DH		 2111int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
2112{
2113 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2114
2115 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
2116}
2117
2118void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
2119{
2120 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2121
2122 spin_lock(&li->lock);
2123 li->irq.stop.flags = 0;
2124 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
2125 spin_unlock(&li->lock);
2126}
2127
79e87a10 2128static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 2129{
0146a7b0 2130 int rc;
ba5c1e9b 2131
383d0b05 2132 switch (irq->type) {
ba5c1e9b 2133 case KVM_S390_PROGRAM_INT:
383d0b05 2134 rc = __inject_prog(vcpu, irq);
ba5c1e9b 2135 break;
b7e6e4d3 2136 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 2137 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 2138 break;
ba5c1e9b 2139 case KVM_S390_SIGP_STOP:
383d0b05 2140 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 2141 break;
ba5c1e9b 2142 case KVM_S390_RESTART:
7775cbaa 2143 rc = __inject_sigp_restart(vcpu);
0146a7b0 2144 break;
e029ae5b 2145 case KVM_S390_INT_CLOCK_COMP:
383d0b05 2146 rc = __inject_ckc(vcpu);
0146a7b0 2147 break;
e029ae5b 2148 case KVM_S390_INT_CPU_TIMER:
383d0b05 2149 rc = __inject_cpu_timer(vcpu);
82a12737 2150 break;
7697e71f 2151 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 2152 rc = __inject_extcall(vcpu, irq);
82a12737 2153 break;
ba5c1e9b 2154 case KVM_S390_INT_EMERGENCY:
383d0b05 2155 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 2156 break;
48a3e950 2157 case KVM_S390_MCHK:
383d0b05 2158 rc = __inject_mchk(vcpu, irq);
48a3e950 2159 break;
3c038e6b 2160 case KVM_S390_INT_PFAULT_INIT:
383d0b05 2161 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 2162 break;
ba5c1e9b
CO		 2163 case KVM_S390_INT_VIRTIO:
2164 case KVM_S390_INT_SERVICE:
d8346b7d 2165 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 2166 default:
0146a7b0 2167 rc = -EINVAL;
ba5c1e9b 2168 }
79e87a10
JF		 2169
2170 return rc;
2171}
2172
2173int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
2174{
2175 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2176 int rc;
2177
2178 spin_lock(&li->lock);
2179 rc = do_inject_vcpu(vcpu, irq);
4ae3c081 2180 spin_unlock(&li->lock);
0146a7b0
JF		 2181 if (!rc)
2182 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 2183 return rc;
ba5c1e9b 2184}
c05c4186 2185
6d3da241 2186static inline void clear_irq_list(struct list_head *_list)
c05c4186 2187{
6d3da241 2188 struct kvm_s390_interrupt_info *inti, *n;
c05c4186 2189
6d3da241 2190 list_for_each_entry_safe(inti, n, _list, list) {
c05c4186
JF		 2191 list_del(&inti->list);
2192 kfree(inti);
2193 }
c05c4186
JF		 2194}
2195
94aa033e
JF		 2196static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
2197 struct kvm_s390_irq *irq)
c05c4186 2198{
94aa033e 2199 irq->type = inti->type;
c05c4186 2200 switch (inti->type) {
3c038e6b
DD		 2201 case KVM_S390_INT_PFAULT_INIT:
2202 case KVM_S390_INT_PFAULT_DONE:
c05c4186 2203 case KVM_S390_INT_VIRTIO:
94aa033e 2204 irq->u.ext = inti->ext;
c05c4186
JF		 2205 break;
2206 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 2207 irq->u.io = inti->io;
c05c4186 2208 break;
c05c4186 2209 }
c05c4186
JF		 2210}
2211
6d3da241
JF		 2212void kvm_s390_clear_float_irqs(struct kvm *kvm)
2213{
2214 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2215 int i;
2216
0890ddea
CB		 2217 mutex_lock(&kvm->lock);
2218 if (!kvm_s390_pv_is_protected(kvm))
2219 fi->masked_irqs = 0;
2220 mutex_unlock(&kvm->lock);
6d3da241 2221 spin_lock(&fi->lock);
f2ae45ed
JF		 2222 fi->pending_irqs = 0;
2223 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
2224 memset(&fi->mchk, 0, sizeof(fi->mchk));
6d3da241
JF		 2225 for (i = 0; i < FIRQ_LIST_COUNT; i++)
2226 clear_irq_list(&fi->lists[i]);
2227 for (i = 0; i < FIRQ_MAX_COUNT; i++)
2228 fi->counters[i] = 0;
2229 spin_unlock(&fi->lock);
24160af6 2230 kvm_s390_gisa_clear(kvm);
6d3da241
JF		 2231};
2232
94aa033e 2233static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186 2234{
982cff42 2235 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
c05c4186
JF		 2236 struct kvm_s390_interrupt_info *inti;
2237 struct kvm_s390_float_interrupt *fi;
94aa033e 2238 struct kvm_s390_irq *buf;
6d3da241 2239 struct kvm_s390_irq *irq;
94aa033e 2240 int max_irqs;
c05c4186
JF		 2241 int ret = 0;
2242 int n = 0;
6d3da241 2243 int i;
c05c4186 2244
94aa033e
JF		 2245 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
2246 return -EINVAL;
2247
2248 /*
2249 * We are already using -ENOMEM to signal
2250 * userspace it may retry with a bigger buffer,
2251 * so we need to use something else for this case
2252 */
2253 buf = vzalloc(len);
2254 if (!buf)
2255 return -ENOBUFS;
2256
2257 max_irqs = len / sizeof(struct kvm_s390_irq);
2258
982cff42 2259 if (gi->origin && gisa_get_ipm(gi->origin)) {
24160af6
MM		 2260 for (i = 0; i <= MAX_ISC; i++) {
2261 if (n == max_irqs) {
2262 /* signal userspace to try again */
2263 ret = -ENOMEM;
2264 goto out_nolock;
2265 }
982cff42 2266 if (gisa_tac_ipm_gisc(gi->origin, i)) {
24160af6
MM		 2267 irq = (struct kvm_s390_irq *) &buf[n];
2268 irq->type = KVM_S390_INT_IO(1, 0, 0, 0);
2269 irq->u.io.io_int_word = isc_to_int_word(i);
2270 n++;
2271 }
2272 }
2273 }
c05c4186
JF		 2274 fi = &kvm->arch.float_int;
2275 spin_lock(&fi->lock);
6d3da241
JF		 2276 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
2277 list_for_each_entry(inti, &fi->lists[i], list) {
2278 if (n == max_irqs) {
2279 /* signal userspace to try again */
2280 ret = -ENOMEM;
2281 goto out;
2282 }
2283 inti_to_irq(inti, &buf[n]);
2284 n++;
2285 }
2286 }
0890ddea
CB		 2287 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs) ||
2288 test_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs)) {
94aa033e 2289 if (n == max_irqs) {
c05c4186
JF		 2290 /* signal userspace to try again */
2291 ret = -ENOMEM;
6d3da241 2292 goto out;
c05c4186 2293 }
6d3da241
JF		 2294 irq = (struct kvm_s390_irq *) &buf[n];
2295 irq->type = KVM_S390_INT_SERVICE;
2296 irq->u.ext = fi->srv_signal;
c05c4186
JF		 2297 n++;
2298 }
6d3da241
JF		 2299 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
2300 if (n == max_irqs) {
2301 /* signal userspace to try again */
2302 ret = -ENOMEM;
2303 goto out;
2304 }
2305 irq = (struct kvm_s390_irq *) &buf[n];
2306 irq->type = KVM_S390_MCHK;
2307 irq->u.mchk = fi->mchk;
2308 n++;
2309}
2310
2311out:
c05c4186 2312 spin_unlock(&fi->lock);
24160af6 2313out_nolock:
94aa033e
JF		 2314 if (!ret && n > 0) {
2315 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
2316 ret = -EFAULT;
2317 }
2318 vfree(buf);
c05c4186
JF		 2319
2320 return ret < 0 ? ret : n;
2321}
2322
2c1a48f2
YMZ		 2323static int flic_ais_mode_get_all(struct kvm *kvm, struct kvm_device_attr *attr)
2324{
2325 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2326 struct kvm_s390_ais_all ais;
2327
2328 if (attr->attr < sizeof(ais))
2329 return -EINVAL;
2330
2331 if (!test_kvm_facility(kvm, 72))
c6119908 2332 return -EOPNOTSUPP;
2c1a48f2
YMZ		 2333
2334 mutex_lock(&fi->ais_lock);
2335 ais.simm = fi->simm;
2336 ais.nimm = fi->nimm;
2337 mutex_unlock(&fi->ais_lock);
2338
2339 if (copy_to_user((void __user *)attr->addr, &ais, sizeof(ais)))
2340 return -EFAULT;
2341
2342 return 0;
2343}
2344
c05c4186
JF		 2345static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2346{
2347 int r;
2348
2349 switch (attr->group) {
2350 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 2351 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 2352 attr->attr);
2353 break;
2c1a48f2
YMZ		 2354 case KVM_DEV_FLIC_AISM_ALL:
2355 r = flic_ais_mode_get_all(dev->kvm, attr);
2356 break;
c05c4186
JF		 2357 default:
2358 r = -EINVAL;
2359 }
2360
2361 return r;
2362}
2363
2364static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
2365 u64 addr)
2366{
2367 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
2368 void *target = NULL;
2369 void __user *source;
2370 u64 size;
2371
2372 if (get_user(inti->type, (u64 __user *)addr))
2373 return -EFAULT;
2374
2375 switch (inti->type) {
3c038e6b
DD		 2376 case KVM_S390_INT_PFAULT_INIT:
2377 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 2378 case KVM_S390_INT_VIRTIO:
2379 case KVM_S390_INT_SERVICE:
2380 target = (void *) &inti->ext;
2381 source = &uptr->u.ext;
2382 size = sizeof(inti->ext);
2383 break;
2384 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
2385 target = (void *) &inti->io;
2386 source = &uptr->u.io;
2387 size = sizeof(inti->io);
2388 break;
2389 case KVM_S390_MCHK:
2390 target = (void *) &inti->mchk;
2391 source = &uptr->u.mchk;
2392 size = sizeof(inti->mchk);
2393 break;
2394 default:
2395 return -EINVAL;
2396 }
2397
2398 if (copy_from_user(target, source, size))
2399 return -EFAULT;
2400
2401 return 0;
2402}
2403
2404static int enqueue_floating_irq(struct kvm_device *dev,
2405 struct kvm_device_attr *attr)
2406{
2407 struct kvm_s390_interrupt_info *inti = NULL;
2408 int r = 0;
2409 int len = attr->attr;
2410
2411 if (len % sizeof(struct kvm_s390_irq) != 0)
2412 return -EINVAL;
2413 else if (len > KVM_S390_FLIC_MAX_BUFFER)
2414 return -EINVAL;
2415
2416 while (len >= sizeof(struct kvm_s390_irq)) {
2417 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
2418 if (!inti)
2419 return -ENOMEM;
2420
2421 r = copy_irq_from_user(inti, attr->addr);
2422 if (r) {
2423 kfree(inti);
2424 return r;
2425 }
a91b8ebe
JF		 2426 r = __inject_vm(dev->kvm, inti);
2427 if (r) {
2428 kfree(inti);
2429 return r;
2430 }
c05c4186
JF		 2431 len -= sizeof(struct kvm_s390_irq);
2432 attr->addr += sizeof(struct kvm_s390_irq);
2433 }
2434
2435 return r;
2436}
2437
841b91c5
CH		 2438static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
2439{
2440 if (id >= MAX_S390_IO_ADAPTERS)
2441 return NULL;
58616e6a 2442 id = array_index_nospec(id, MAX_S390_IO_ADAPTERS);
841b91c5
CH		 2443 return kvm->arch.adapters[id];
2444}
2445
2446static int register_io_adapter(struct kvm_device *dev,
2447 struct kvm_device_attr *attr)
2448{
2449 struct s390_io_adapter *adapter;
2450 struct kvm_s390_io_adapter adapter_info;
2451
2452 if (copy_from_user(&adapter_info,
2453 (void __user *)attr->addr, sizeof(adapter_info)))
2454 return -EFAULT;
2455
58616e6a
EF		 2456 if (adapter_info.id >= MAX_S390_IO_ADAPTERS)
2457 return -EINVAL;
2458
2459 adapter_info.id = array_index_nospec(adapter_info.id,
2460 MAX_S390_IO_ADAPTERS);
2461
2462 if (dev->kvm->arch.adapters[adapter_info.id] != NULL)
841b91c5
CH		 2463 return -EINVAL;
2464
2465 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2466 if (!adapter)
2467 return -ENOMEM;
2468
841b91c5
CH		 2469 adapter->id = adapter_info.id;
2470 adapter->isc = adapter_info.isc;
2471 adapter->maskable = adapter_info.maskable;
2472 adapter->masked = false;
2473 adapter->swap = adapter_info.swap;
08fab50d
FL		 2474 adapter->suppressible = (adapter_info.flags) &
2475 KVM_S390_ADAPTER_SUPPRESSIBLE;
841b91c5
CH		 2476 dev->kvm->arch.adapters[adapter->id] = adapter;
2477
2478 return 0;
2479}
2480
2481int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
2482{
2483 int ret;
2484 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2485
2486 if (!adapter || !adapter->maskable)
2487 return -EINVAL;
2488 ret = adapter->masked;
2489 adapter->masked = masked;
2490 return ret;
2491}
2492
841b91c5
CH		 2493void kvm_s390_destroy_adapters(struct kvm *kvm)
2494{
2495 int i;
841b91c5 2496
f6547066 2497 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++)
841b91c5 2498 kfree(kvm->arch.adapters[i]);
841b91c5
CH		 2499}
2500
2501static int modify_io_adapter(struct kvm_device *dev,
2502 struct kvm_device_attr *attr)
2503{
2504 struct kvm_s390_io_adapter_req req;
2505 struct s390_io_adapter *adapter;
2506 int ret;
2507
2508 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2509 return -EFAULT;
2510
2511 adapter = get_io_adapter(dev->kvm, req.id);
2512 if (!adapter)
2513 return -EINVAL;
2514 switch (req.type) {
2515 case KVM_S390_IO_ADAPTER_MASK:
2516 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
2517 if (ret > 0)
2518 ret = 0;
2519 break;
f6547066
UW		 2520 /*
2521 * The following operations are no longer needed and therefore no-ops.
2522 * The gpa to hva translation is done when an IRQ route is set up. The
2523 * set_irq code uses get_user_pages_remote() to do the actual write.
2524 */
841b91c5 2525 case KVM_S390_IO_ADAPTER_MAP:
841b91c5 2526 case KVM_S390_IO_ADAPTER_UNMAP:
f6547066 2527 ret = 0;
841b91c5
CH		 2528 break;
2529 default:
2530 ret = -EINVAL;
2531 }
2532
2533 return ret;
2534}
2535
6d28f789
HP		 2536static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
2537
2538{
2539 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
2540 u32 schid;
2541
2542 if (attr->flags)
2543 return -EINVAL;
2544 if (attr->attr != sizeof(schid))
2545 return -EINVAL;
2546 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
2547 return -EFAULT;
4dd6f17e
MM		 2548 if (!schid)
2549 return -EINVAL;
6d28f789
HP		 2550 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
2551 /*
2552 * If userspace is conforming to the architecture, we can have at most
2553 * one pending I/O interrupt per subchannel, so this is effectively a
2554 * clear all.
2555 */
2556 return 0;
2557}
2558
51978393
FL		 2559static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr)
2560{
2561 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2562 struct kvm_s390_ais_req req;
2563 int ret = 0;
2564
1ba15b24 2565 if (!test_kvm_facility(kvm, 72))
c6119908 2566 return -EOPNOTSUPP;
51978393
FL		 2567
2568 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2569 return -EFAULT;
2570
2571 if (req.isc > MAX_ISC)
2572 return -EINVAL;
2573
2574 trace_kvm_s390_modify_ais_mode(req.isc,
2575 (fi->simm & AIS_MODE_MASK(req.isc)) ?
2576 (fi->nimm & AIS_MODE_MASK(req.isc)) ?
2577 2 : KVM_S390_AIS_MODE_SINGLE :
2578 KVM_S390_AIS_MODE_ALL, req.mode);
2579
2580 mutex_lock(&fi->ais_lock);
2581 switch (req.mode) {
2582 case KVM_S390_AIS_MODE_ALL:
2583 fi->simm &= ~AIS_MODE_MASK(req.isc);
2584 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2585 break;
2586 case KVM_S390_AIS_MODE_SINGLE:
2587 fi->simm |= AIS_MODE_MASK(req.isc);
2588 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2589 break;
2590 default:
2591 ret = -EINVAL;
2592 }
2593 mutex_unlock(&fi->ais_lock);
2594
2595 return ret;
2596}
2597
a8920950
YMZ		 2598static int kvm_s390_inject_airq(struct kvm *kvm,
2599 struct s390_io_adapter *adapter)
2600{
2601 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2602 struct kvm_s390_interrupt s390int = {
2603 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2604 .parm = 0,
2496c8e7 2605 .parm64 = isc_to_int_word(adapter->isc),
a8920950
YMZ		 2606 };
2607 int ret = 0;
2608
1ba15b24 2609 if (!test_kvm_facility(kvm, 72) || !adapter->suppressible)
a8920950
YMZ		 2610 return kvm_s390_inject_vm(kvm, &s390int);
2611
2612 mutex_lock(&fi->ais_lock);
2613 if (fi->nimm & AIS_MODE_MASK(adapter->isc)) {
2614 trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc);
2615 goto out;
2616 }
2617
2618 ret = kvm_s390_inject_vm(kvm, &s390int);
2619 if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) {
2620 fi->nimm |= AIS_MODE_MASK(adapter->isc);
2621 trace_kvm_s390_modify_ais_mode(adapter->isc,
2622 KVM_S390_AIS_MODE_SINGLE, 2);
2623 }
2624out:
2625 mutex_unlock(&fi->ais_lock);
2626 return ret;
2627}
2628
2629static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr)
2630{
2631 unsigned int id = attr->attr;
2632 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2633
2634 if (!adapter)
2635 return -EINVAL;
2636
2637 return kvm_s390_inject_airq(kvm, adapter);
2638}
2639
2c1a48f2
YMZ		 2640static int flic_ais_mode_set_all(struct kvm *kvm, struct kvm_device_attr *attr)
2641{
2642 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2643 struct kvm_s390_ais_all ais;
2644
2645 if (!test_kvm_facility(kvm, 72))
c6119908 2646 return -EOPNOTSUPP;
2c1a48f2
YMZ		 2647
2648 if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais)))
2649 return -EFAULT;
2650
2651 mutex_lock(&fi->ais_lock);
2652 fi->simm = ais.simm;
2653 fi->nimm = ais.nimm;
2654 mutex_unlock(&fi->ais_lock);
2655
2656 return 0;
2657}
2658
c05c4186
JF		 2659static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2660{
2661 int r = 0;
3c038e6b
DD		 2662 unsigned int i;
2663 struct kvm_vcpu *vcpu;
c05c4186
JF		 2664
2665 switch (attr->group) {
2666 case KVM_DEV_FLIC_ENQUEUE:
2667 r = enqueue_floating_irq(dev, attr);
2668 break;
2669 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 2670 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 2671 break;
3c038e6b
DD		 2672 case KVM_DEV_FLIC_APF_ENABLE:
2673 dev->kvm->arch.gmap->pfault_enabled = 1;
2674 break;
2675 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2676 dev->kvm->arch.gmap->pfault_enabled = 0;
2677 /*
2678 * Make sure no async faults are in transition when
2679 * clearing the queues. So we don't need to worry
2680 * about late coming workers.
2681 */
2682 synchronize_srcu(&dev->kvm->srcu);
2683 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2684 kvm_clear_async_pf_completion_queue(vcpu);
2685 break;
841b91c5
CH		 2686 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2687 r = register_io_adapter(dev, attr);
2688 break;
2689 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2690 r = modify_io_adapter(dev, attr);
2691 break;
6d28f789
HP		 2692 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2693 r = clear_io_irq(dev->kvm, attr);
2694 break;
51978393
FL		 2695 case KVM_DEV_FLIC_AISM:
2696 r = modify_ais_mode(dev->kvm, attr);
2697 break;
a8920950
YMZ		 2698 case KVM_DEV_FLIC_AIRQ_INJECT:
2699 r = flic_inject_airq(dev->kvm, attr);
2700 break;
2c1a48f2
YMZ		 2701 case KVM_DEV_FLIC_AISM_ALL:
2702 r = flic_ais_mode_set_all(dev->kvm, attr);
2703 break;
c05c4186
JF		 2704 default:
2705 r = -EINVAL;
2706 }
2707
2708 return r;
2709}
2710
4f129858
HP		 2711static int flic_has_attr(struct kvm_device *dev,
2712 struct kvm_device_attr *attr)
2713{
2714 switch (attr->group) {
2715 case KVM_DEV_FLIC_GET_ALL_IRQS:
2716 case KVM_DEV_FLIC_ENQUEUE:
2717 case KVM_DEV_FLIC_CLEAR_IRQS:
2718 case KVM_DEV_FLIC_APF_ENABLE:
2719 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2720 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2721 case KVM_DEV_FLIC_ADAPTER_MODIFY:
6d28f789 2722 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
51978393 2723 case KVM_DEV_FLIC_AISM:
a8920950 2724 case KVM_DEV_FLIC_AIRQ_INJECT:
2c1a48f2 2725 case KVM_DEV_FLIC_AISM_ALL:
4f129858
HP		 2726 return 0;
2727 }
2728 return -ENXIO;
2729}
2730
c05c4186
JF		 2731static int flic_create(struct kvm_device *dev, u32 type)
2732{
2733 if (!dev)
2734 return -EINVAL;
2735 if (dev->kvm->arch.flic)
2736 return -EINVAL;
2737 dev->kvm->arch.flic = dev;
2738 return 0;
2739}
2740
2741static void flic_destroy(struct kvm_device *dev)
2742{
2743 dev->kvm->arch.flic = NULL;
2744 kfree(dev);
2745}
2746
2747/* s390 floating irq controller (flic) */
2748struct kvm_device_ops kvm_flic_ops = {
2749 .name = "kvm-flic",
2750 .get_attr = flic_get_attr,
2751 .set_attr = flic_set_attr,
4f129858 2752 .has_attr = flic_has_attr,
c05c4186
JF		 2753 .create = flic_create,
2754 .destroy = flic_destroy,
2755};
84223598
CH		 2756
2757static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2758{
2759 unsigned long bit;
2760
2761 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2762
2763 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2764}
2765
f6547066 2766static struct page *get_map_page(struct kvm *kvm, u64 uaddr)
84223598 2767{
f6547066 2768 struct page *page = NULL;
84223598 2769
f6547066
UW		 2770 down_read(&kvm->mm->mmap_sem);
2771 get_user_pages_remote(NULL, kvm->mm, uaddr, 1, FOLL_WRITE,
2772 &page, NULL, NULL);
2773 up_read(&kvm->mm->mmap_sem);
2774 return page;
84223598
CH		 2775}
2776
2777static int adapter_indicators_set(struct kvm *kvm,
2778 struct s390_io_adapter *adapter,
2779 struct kvm_s390_adapter_int *adapter_int)
2780{
2781 unsigned long bit;
2782 int summary_set, idx;
f6547066 2783 struct page *ind_page, *summary_page;
84223598
CH		 2784 void *map;
2785
f6547066
UW		 2786 ind_page = get_map_page(kvm, adapter_int->ind_addr);
2787 if (!ind_page)
84223598 2788 return -1;
f6547066
UW		 2789 summary_page = get_map_page(kvm, adapter_int->summary_addr);
2790 if (!summary_page) {
2791 put_page(ind_page);
84223598
CH		 2792 return -1;
2793 }
f6547066
UW		 2794
2795 idx = srcu_read_lock(&kvm->srcu);
2796 map = page_address(ind_page);
2797 bit = get_ind_bit(adapter_int->ind_addr,
2798 adapter_int->ind_offset, adapter->swap);
2799 set_bit(bit, map);
2800 mark_page_dirty(kvm, adapter_int->ind_addr >> PAGE_SHIFT);
2801 set_page_dirty_lock(ind_page);
2802 map = page_address(summary_page);
2803 bit = get_ind_bit(adapter_int->summary_addr,
2804 adapter_int->summary_offset, adapter->swap);
84223598 2805 summary_set = test_and_set_bit(bit, map);
f6547066
UW		 2806 mark_page_dirty(kvm, adapter_int->summary_addr >> PAGE_SHIFT);
2807 set_page_dirty_lock(summary_page);
84223598 2808 srcu_read_unlock(&kvm->srcu, idx);
f6547066
UW		 2809
2810 put_page(ind_page);
2811 put_page(summary_page);
84223598
CH		 2812 return summary_set ? 0 : 1;
2813}
2814
2815/*
2816 * < 0 - not injected due to error
2817 * = 0 - coalesced, summary indicator already active
2818 * > 0 - injected interrupt
2819 */
2820static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2821 struct kvm *kvm, int irq_source_id, int level,
2822 bool line_status)
2823{
2824 int ret;
2825 struct s390_io_adapter *adapter;
2826
2827 /* We're only interested in the 0->1 transition. */
2828 if (!level)
2829 return 0;
2830 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2831 if (!adapter)
2832 return -1;
84223598 2833 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
84223598 2834 if ((ret > 0) && !adapter->masked) {
a8920950 2835 ret = kvm_s390_inject_airq(kvm, adapter);
84223598
CH		 2836 if (ret == 0)
2837 ret = 1;
2838 }
2839 return ret;
2840}
2841
4d62fcc0
QH		 2842/*
2843 * Inject the machine check to the guest.
2844 */
2845void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
2846 struct mcck_volatile_info *mcck_info)
2847{
2848 struct kvm_s390_interrupt_info inti;
2849 struct kvm_s390_irq irq;
2850 struct kvm_s390_mchk_info *mchk;
2851 union mci mci;
2852 __u64 cr14 = 0; /* upper bits are not used */
3dbf0205 2853 int rc;
4d62fcc0
QH		 2854
2855 mci.val = mcck_info->mcic;
2856 if (mci.sr)
cc65450c 2857 cr14 |= CR14_RECOVERY_SUBMASK;
4d62fcc0 2858 if (mci.dg)
cc65450c 2859 cr14 |= CR14_DEGRADATION_SUBMASK;
4d62fcc0 2860 if (mci.w)
cc65450c 2861 cr14 |= CR14_WARNING_SUBMASK;
4d62fcc0
QH		 2862
2863 mchk = mci.ck ? &inti.mchk : &irq.u.mchk;
2864 mchk->cr14 = cr14;
2865 mchk->mcic = mcck_info->mcic;
2866 mchk->ext_damage_code = mcck_info->ext_damage_code;
2867 mchk->failing_storage_address = mcck_info->failing_storage_address;
2868 if (mci.ck) {
2869 /* Inject the floating machine check */
2870 inti.type = KVM_S390_MCHK;
3dbf0205 2871 rc = __inject_vm(vcpu->kvm, &inti);
4d62fcc0
QH		 2872 } else {
2873 /* Inject the machine check to specified vcpu */
2874 irq.type = KVM_S390_MCHK;
3dbf0205 2875 rc = kvm_s390_inject_vcpu(vcpu, &irq);
4d62fcc0 2876 }
3dbf0205 2877 WARN_ON_ONCE(rc);
4d62fcc0
QH		 2878}
2879
c63cf538
RK		 2880int kvm_set_routing_entry(struct kvm *kvm,
2881 struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 2882 const struct kvm_irq_routing_entry *ue)
2883{
f6547066 2884 u64 uaddr;
84223598
CH		 2885
2886 switch (ue->type) {
f6547066 2887 /* we store the userspace addresses instead of the guest addresses */
84223598
CH		 2888 case KVM_IRQ_ROUTING_S390_ADAPTER:
2889 e->set = set_adapter_int;
f6547066
UW		 2890 uaddr = gmap_translate(kvm->arch.gmap, ue->u.adapter.summary_addr);
2891 if (uaddr == -EFAULT)
2892 return -EFAULT;
2893 e->adapter.summary_addr = uaddr;
2894 uaddr = gmap_translate(kvm->arch.gmap, ue->u.adapter.ind_addr);
2895 if (uaddr == -EFAULT)
2896 return -EFAULT;
2897 e->adapter.ind_addr = uaddr;
84223598
CH		 2898 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2899 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2900 e->adapter.adapter_id = ue->u.adapter.adapter_id;
f6547066 2901 return 0;
84223598 2902 default:
f6547066 2903 return -EINVAL;
84223598 2904 }
84223598
CH		 2905}
2906
2907int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2908 int irq_source_id, int level, bool line_status)
2909{
2910 return -EINVAL;
2911}
816c7667
JF		 2912
2913int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2914{
2915 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2916 struct kvm_s390_irq *buf;
2917 int r = 0;
2918 int n;
2919
2920 buf = vmalloc(len);
2921 if (!buf)
2922 return -ENOMEM;
2923
2924 if (copy_from_user((void *) buf, irqstate, len)) {
2925 r = -EFAULT;
2926 goto out_free;
2927 }
2928
2929 /*
2930 * Don't allow setting the interrupt state
2931 * when there are already interrupts pending
2932 */
2933 spin_lock(&li->lock);
2934 if (li->pending_irqs) {
2935 r = -EBUSY;
2936 goto out_unlock;
2937 }
2938
2939 for (n = 0; n < len / sizeof(*buf); n++) {
2940 r = do_inject_vcpu(vcpu, &buf[n]);
2941 if (r)
2942 break;
2943 }
2944
2945out_unlock:
2946 spin_unlock(&li->lock);
2947out_free:
2948 vfree(buf);
2949
2950 return r;
2951}
2952
2953static void store_local_irq(struct kvm_s390_local_interrupt *li,
2954 struct kvm_s390_irq *irq,
2955 unsigned long irq_type)
2956{
2957 switch (irq_type) {
2958 case IRQ_PEND_MCHK_EX:
2959 case IRQ_PEND_MCHK_REP:
2960 irq->type = KVM_S390_MCHK;
2961 irq->u.mchk = li->irq.mchk;
2962 break;
2963 case IRQ_PEND_PROG:
2964 irq->type = KVM_S390_PROGRAM_INT;
2965 irq->u.pgm = li->irq.pgm;
2966 break;
2967 case IRQ_PEND_PFAULT_INIT:
2968 irq->type = KVM_S390_INT_PFAULT_INIT;
2969 irq->u.ext = li->irq.ext;
2970 break;
2971 case IRQ_PEND_EXT_EXTERNAL:
2972 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2973 irq->u.extcall = li->irq.extcall;
2974 break;
2975 case IRQ_PEND_EXT_CLOCK_COMP:
2976 irq->type = KVM_S390_INT_CLOCK_COMP;
2977 break;
2978 case IRQ_PEND_EXT_CPU_TIMER:
2979 irq->type = KVM_S390_INT_CPU_TIMER;
2980 break;
2981 case IRQ_PEND_SIGP_STOP:
2982 irq->type = KVM_S390_SIGP_STOP;
2983 irq->u.stop = li->irq.stop;
2984 break;
2985 case IRQ_PEND_RESTART:
2986 irq->type = KVM_S390_RESTART;
2987 break;
2988 case IRQ_PEND_SET_PREFIX:
2989 irq->type = KVM_S390_SIGP_SET_PREFIX;
2990 irq->u.prefix = li->irq.prefix;
2991 break;
2992 }
2993}
2994
2995int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2996{
a5bd7647 2997 int scn;
689bdf9e 2998 DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
816c7667
JF		 2999 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
3000 unsigned long pending_irqs;
3001 struct kvm_s390_irq irq;
3002 unsigned long irq_type;
3003 int cpuaddr;
3004 int n = 0;
3005
3006 spin_lock(&li->lock);
3007 pending_irqs = li->pending_irqs;
3008 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
3009 sizeof(sigp_emerg_pending));
3010 spin_unlock(&li->lock);
3011
3012 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
3013 memset(&irq, 0, sizeof(irq));
3014 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
3015 continue;
3016 if (n + sizeof(irq) > len)
3017 return -ENOBUFS;
3018 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
3019 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
3020 return -EFAULT;
3021 n += sizeof(irq);
3022 }
3023
3024 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
3025 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
3026 memset(&irq, 0, sizeof(irq));
3027 if (n + sizeof(irq) > len)
3028 return -ENOBUFS;
3029 irq.type = KVM_S390_INT_EMERGENCY;
3030 irq.u.emerg.code = cpuaddr;
3031 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
3032 return -EFAULT;
3033 n += sizeof(irq);
3034 }
3035 }
3036
a5bd7647 3037 if (sca_ext_call_pending(vcpu, &scn)) {
816c7667
JF		 3038 if (n + sizeof(irq) > len)
3039 return -ENOBUFS;
3040 memset(&irq, 0, sizeof(irq));
3041 irq.type = KVM_S390_INT_EXTERNAL_CALL;
a5bd7647 3042 irq.u.extcall.code = scn;
816c7667
JF		 3043 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
3044 return -EFAULT;
3045 n += sizeof(irq);
3046 }
3047
3048 return n;
3049}
d7c5cb01 3050
9f30f621
MM		 3051static void __airqs_kick_single_vcpu(struct kvm *kvm, u8 deliverable_mask)
3052{
3053 int vcpu_id, online_vcpus = atomic_read(&kvm->online_vcpus);
3054 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3055 struct kvm_vcpu *vcpu;
3056
3057 for_each_set_bit(vcpu_id, kvm->arch.idle_mask, online_vcpus) {
3058 vcpu = kvm_get_vcpu(kvm, vcpu_id);
3059 if (psw_ioint_disabled(vcpu))
3060 continue;
3061 deliverable_mask &= (u8)(vcpu->arch.sie_block->gcr[6] >> 24);
3062 if (deliverable_mask) {
3063 /* lately kicked but not yet running */
3064 if (test_and_set_bit(vcpu_id, gi->kicked_mask))
3065 return;
3066 kvm_s390_vcpu_wakeup(vcpu);
3067 return;
3068 }
3069 }
3070}
3071
3072static enum hrtimer_restart gisa_vcpu_kicker(struct hrtimer *timer)
3073{
3074 struct kvm_s390_gisa_interrupt *gi =
3075 container_of(timer, struct kvm_s390_gisa_interrupt, timer);
3076 struct kvm *kvm =
3077 container_of(gi->origin, struct sie_page2, gisa)->kvm;
3078 u8 pending_mask;
3079
3080 pending_mask = gisa_get_ipm_or_restore_iam(gi);
3081 if (pending_mask) {
3082 __airqs_kick_single_vcpu(kvm, pending_mask);
3083 hrtimer_forward_now(timer, ns_to_ktime(gi->expires));
3084 return HRTIMER_RESTART;
3085 };
3086
3087 return HRTIMER_NORESTART;
3088}
3089
3090#define NULL_GISA_ADDR 0x00000000UL
3091#define NONE_GISA_ADDR 0x00000001UL
3092#define GISA_ADDR_MASK 0xfffff000UL
3093
3094static void process_gib_alert_list(void)
3095{
3096 struct kvm_s390_gisa_interrupt *gi;
3097 struct kvm_s390_gisa *gisa;
3098 struct kvm *kvm;
3099 u32 final, origin = 0UL;
3100
3101 do {
3102 /*
3103 * If the NONE_GISA_ADDR is still stored in the alert list
3104 * origin, we will leave the outer loop. No further GISA has
3105 * been added to the alert list by millicode while processing
3106 * the current alert list.
3107 */
3108 final = (origin & NONE_GISA_ADDR);
3109 /*
3110 * Cut off the alert list and store the NONE_GISA_ADDR in the
3111 * alert list origin to avoid further GAL interruptions.
3112 * A new alert list can be build up by millicode in parallel
3113 * for guests not in the yet cut-off alert list. When in the
3114 * final loop, store the NULL_GISA_ADDR instead. This will re-
3115 * enable GAL interruptions on the host again.
3116 */
3117 origin = xchg(&gib->alert_list_origin,
3118 (!final) ? NONE_GISA_ADDR : NULL_GISA_ADDR);
3119 /*
3120 * Loop through the just cut-off alert list and start the
3121 * gisa timers to kick idle vcpus to consume the pending
3122 * interruptions asap.
3123 */
3124 while (origin & GISA_ADDR_MASK) {
3125 gisa = (struct kvm_s390_gisa *)(u64)origin;
3126 origin = gisa->next_alert;
3127 gisa->next_alert = (u32)(u64)gisa;
3128 kvm = container_of(gisa, struct sie_page2, gisa)->kvm;
3129 gi = &kvm->arch.gisa_int;
3130 if (hrtimer_active(&gi->timer))
3131 hrtimer_cancel(&gi->timer);
3132 hrtimer_start(&gi->timer, 0, HRTIMER_MODE_REL);
3133 }
3134 } while (!final);
3135
3136}
3137
d7c5cb01
MM		 3138void kvm_s390_gisa_clear(struct kvm *kvm)
3139{
982cff42
MM		 3140 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3141
3142 if (!gi->origin)
672128bf 3143 return;
174dd4f8 3144 gisa_clear_ipm(gi->origin);
982cff42 3145 VM_EVENT(kvm, 3, "gisa 0x%pK cleared", gi->origin);
d7c5cb01
MM		 3146}
3147
3148void kvm_s390_gisa_init(struct kvm *kvm)
3149{
982cff42
MM		 3150 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3151
672128bf
MM		 3152 if (!css_general_characteristics.aiv)
3153 return;
982cff42 3154 gi->origin = &kvm->arch.sie_page2->gisa;
6cff2e10
MM		 3155 gi->alert.mask = 0;
3156 spin_lock_init(&gi->alert.ref_lock);
9f30f621
MM		 3157 gi->expires = 50 * 1000; /* 50 usec */
3158 hrtimer_init(&gi->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
3159 gi->timer.function = gisa_vcpu_kicker;
174dd4f8
MM		 3160 memset(gi->origin, 0, sizeof(struct kvm_s390_gisa));
3161 gi->origin->next_alert = (u32)(u64)gi->origin;
982cff42 3162 VM_EVENT(kvm, 3, "gisa 0x%pK initialized", gi->origin);
d7c5cb01
MM		 3163}
3164
3165void kvm_s390_gisa_destroy(struct kvm *kvm)
3166{
9f30f621
MM		 3167 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3168
3169 if (!gi->origin)
3170 return;
3171 if (gi->alert.mask)
3172 KVM_EVENT(3, "vm 0x%pK has unexpected iam 0x%02x",
3173 kvm, gi->alert.mask);
3174 while (gisa_in_alert_list(gi->origin))
3175 cpu_relax();
3176 hrtimer_cancel(&gi->timer);
3177 gi->origin = NULL;
d7c5cb01 3178}
1282c21e 3179
6cff2e10
MM		 3180/**
3181 * kvm_s390_gisc_register - register a guest ISC
3182 *
3183 * @kvm: the kernel vm to work with
3184 * @gisc: the guest interruption sub class to register
3185 *
3186 * The function extends the vm specific alert mask to use.
3187 * The effective IAM mask in the GISA is updated as well
3188 * in case the GISA is not part of the GIB alert list.
3189 * It will be updated latest when the IAM gets restored
3190 * by gisa_get_ipm_or_restore_iam().
3191 *
3192 * Returns: the nonspecific ISC (NISC) the gib alert mechanism
3193 * has registered with the channel subsystem.
3194 * -ENODEV in case the vm uses no GISA
3195 * -ERANGE in case the guest ISC is invalid
3196 */
3197int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc)
3198{
3199 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3200
3201 if (!gi->origin)
3202 return -ENODEV;
3203 if (gisc > MAX_ISC)
3204 return -ERANGE;
3205
3206 spin_lock(&gi->alert.ref_lock);
3207 gi->alert.ref_count[gisc]++;
3208 if (gi->alert.ref_count[gisc] == 1) {
3209 gi->alert.mask |= 0x80 >> gisc;
3210 gisa_set_iam(gi->origin, gi->alert.mask);
3211 }
3212 spin_unlock(&gi->alert.ref_lock);
3213
3214 return gib->nisc;
3215}
3216EXPORT_SYMBOL_GPL(kvm_s390_gisc_register);
3217
3218/**
3219 * kvm_s390_gisc_unregister - unregister a guest ISC
3220 *
3221 * @kvm: the kernel vm to work with
3222 * @gisc: the guest interruption sub class to register
3223 *
3224 * The function reduces the vm specific alert mask to use.
3225 * The effective IAM mask in the GISA is updated as well
3226 * in case the GISA is not part of the GIB alert list.
3227 * It will be updated latest when the IAM gets restored
3228 * by gisa_get_ipm_or_restore_iam().
3229 *
3230 * Returns: the nonspecific ISC (NISC) the gib alert mechanism
3231 * has registered with the channel subsystem.
3232 * -ENODEV in case the vm uses no GISA
3233 * -ERANGE in case the guest ISC is invalid
3234 * -EINVAL in case the guest ISC is not registered
3235 */
3236int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc)
3237{
3238 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3239 int rc = 0;
3240
3241 if (!gi->origin)
3242 return -ENODEV;
3243 if (gisc > MAX_ISC)
3244 return -ERANGE;
3245
3246 spin_lock(&gi->alert.ref_lock);
3247 if (gi->alert.ref_count[gisc] == 0) {
3248 rc = -EINVAL;
3249 goto out;
3250 }
3251 gi->alert.ref_count[gisc]--;
3252 if (gi->alert.ref_count[gisc] == 0) {
3253 gi->alert.mask &= ~(0x80 >> gisc);
3254 gisa_set_iam(gi->origin, gi->alert.mask);
3255 }
3256out:
3257 spin_unlock(&gi->alert.ref_lock);
3258
3259 return rc;
3260}
3261EXPORT_SYMBOL_GPL(kvm_s390_gisc_unregister);
3262
30e63ef2 3263static void gib_alert_irq_handler(struct airq_struct *airq, bool floating)
9f30f621
MM		 3264{
3265 inc_irq_stat(IRQIO_GAL);
3266 process_gib_alert_list();
3267}
3268
3269static struct airq_struct gib_alert_irq = {
3270 .handler = gib_alert_irq_handler,
3271 .lsi_ptr = &gib_alert_irq.lsi_mask,
3272};
3273
1282c21e
MM		 3274void kvm_s390_gib_destroy(void)
3275{
3276 if (!gib)
3277 return;
3278 chsc_sgib(0);
9f30f621 3279 unregister_adapter_interrupt(&gib_alert_irq);
1282c21e
MM		 3280 free_page((unsigned long)gib);
3281 gib = NULL;
3282}
3283
3284int kvm_s390_gib_init(u8 nisc)
3285{
3286 int rc = 0;
3287
3288 if (!css_general_characteristics.aiv) {
3289 KVM_EVENT(3, "%s", "gib not initialized, no AIV facility");
3290 goto out;
3291 }
3292
3293 gib = (struct kvm_s390_gib *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
3294 if (!gib) {
3295 rc = -ENOMEM;
3296 goto out;
3297 }
3298
9f30f621
MM		 3299 gib_alert_irq.isc = nisc;
3300 if (register_adapter_interrupt(&gib_alert_irq)) {
3301 pr_err("Registering the GIB alert interruption handler failed\n");
3302 rc = -EIO;
3303 goto out_free_gib;
3304 }
3305
1282c21e
MM		 3306 gib->nisc = nisc;
3307 if (chsc_sgib((u32)(u64)gib)) {
3308 pr_err("Associating the GIB with the AIV facility failed\n");
3309 free_page((unsigned long)gib);
3310 gib = NULL;
3311 rc = -EIO;
9f30f621 3312 goto out_unreg_gal;
1282c21e
MM		 3313 }
3314
3315 KVM_EVENT(3, "gib 0x%pK (nisc=%d) initialized", gib, gib->nisc);
9f30f621
MM		 3316 goto out;
3317
3318out_unreg_gal:
3319 unregister_adapter_interrupt(&gib_alert_irq);
3320out_free_gib:
3321 free_page((unsigned long)gib);
3322 gib = NULL;
1282c21e
MM		 3323out:
3324 return rc;
3325}
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