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Merge branches 'for-5.1/upstream-fixes', 'for-5.2/core', 'for-5.2/ish', 'for-5.2...
[mirror_ubuntu-kernels.git] / arch / s390 / kvm / interrupt.c
CommitLineData
d809aa23 1// SPDX-License-Identifier: GPL-2.0
ba5c1e9b 2/*
a53c8fab 3 * handling kvm guest interrupts
ba5c1e9b 4 *
33b412ac 5 * Copyright IBM Corp. 2008, 2015
ba5c1e9b 6 *
ba5c1e9b
CO		 7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 */
9
1282c21e
MM		 10#define KMSG_COMPONENT "kvm-s390"
11#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
ca872302 13#include <linux/interrupt.h>
ba5c1e9b 14#include <linux/kvm_host.h>
cbb870c8 15#include <linux/hrtimer.h>
84223598 16#include <linux/mmu_context.h>
3cd61299 17#include <linux/signal.h>
5a0e3ad6 18#include <linux/slab.h>
383d0b05 19#include <linux/bitmap.h>
94aa033e 20#include <linux/vmalloc.h>
cbb870c8 21#include <asm/asm-offsets.h>
33b412ac 22#include <asm/dis.h>
7c0f6ba6 23#include <linux/uaccess.h>
ea5f4969 24#include <asm/sclp.h>
6d3da241 25#include <asm/isc.h>
1e133ab2 26#include <asm/gmap.h>
0319dae6 27#include <asm/switch_to.h>
ff5dc149 28#include <asm/nmi.h>
9f30f621 29#include <asm/airq.h>
ba5c1e9b
CO		 30#include "kvm-s390.h"
31#include "gaccess.h"
ade38c31 32#include "trace-s390.h"
ba5c1e9b 33
44c6ca3d 34#define PFAULT_INIT 0x0600
60f90a14
JF		 35#define PFAULT_DONE 0x0680
36#define VIRTIO_PARAM 0x0d00
d8346b7d 37
1282c21e
MM		 38static struct kvm_s390_gib *gib;
39
a5bd7647
ED		 40/* handle external calls via sigp interpretation facility */
41static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id)
42{
7d43bafc
ED		 43 int c, scn;
44
8d5fb0dc 45 if (!kvm_s390_test_cpuflags(vcpu, CPUSTAT_ECALL_PEND))
2c1bb2be
DH		 46 return 0;
47
a6940674 48 BUG_ON(!kvm_s390_use_sca_entries());
5e044315 49 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 50 if (vcpu->kvm->arch.use_esca) {
51 struct esca_block *sca = vcpu->kvm->arch.sca;
52 union esca_sigp_ctrl sigp_ctrl =
53 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
54
55 c = sigp_ctrl.c;
56 scn = sigp_ctrl.scn;
57 } else {
58 struct bsca_block *sca = vcpu->kvm->arch.sca;
59 union bsca_sigp_ctrl sigp_ctrl =
60 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
61
62 c = sigp_ctrl.c;
63 scn = sigp_ctrl.scn;
64 }
5e044315 65 read_unlock(&vcpu->kvm->arch.sca_lock);
a5bd7647
ED		 66
67 if (src_id)
7d43bafc 68 *src_id = scn;
a5bd7647 69
2c1bb2be 70 return c;
a5bd7647
ED		 71}
72
73static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id)
74{
bc784cce 75 int expect, rc;
a5bd7647 76
a6940674 77 BUG_ON(!kvm_s390_use_sca_entries());
5e044315 78 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 79 if (vcpu->kvm->arch.use_esca) {
80 struct esca_block *sca = vcpu->kvm->arch.sca;
81 union esca_sigp_ctrl *sigp_ctrl =
82 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
83 union esca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
84
85 new_val.scn = src_id;
86 new_val.c = 1;
87 old_val.c = 0;
88
89 expect = old_val.value;
90 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
91 } else {
92 struct bsca_block *sca = vcpu->kvm->arch.sca;
93 union bsca_sigp_ctrl *sigp_ctrl =
94 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
95 union bsca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
bc784cce 96
7d43bafc
ED		 97 new_val.scn = src_id;
98 new_val.c = 1;
99 old_val.c = 0;
100
101 expect = old_val.value;
102 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
103 }
5e044315 104 read_unlock(&vcpu->kvm->arch.sca_lock);
bc784cce
ED		 105
106 if (rc != expect) {
a5bd7647
ED		 107 /* another external call is pending */
108 return -EBUSY;
109 }
ef8f4f49 110 kvm_s390_set_cpuflags(vcpu, CPUSTAT_ECALL_PEND);
a5bd7647
ED		 111 return 0;
112}
113
114static void sca_clear_ext_call(struct kvm_vcpu *vcpu)
115{
7d43bafc 116 int rc, expect;
a5bd7647 117
a6940674
DH		 118 if (!kvm_s390_use_sca_entries())
119 return;
9daecfc6 120 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_ECALL_PEND);
5e044315 121 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 122 if (vcpu->kvm->arch.use_esca) {
123 struct esca_block *sca = vcpu->kvm->arch.sca;
124 union esca_sigp_ctrl *sigp_ctrl =
125 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
126 union esca_sigp_ctrl old = *sigp_ctrl;
127
128 expect = old.value;
129 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
130 } else {
131 struct bsca_block *sca = vcpu->kvm->arch.sca;
132 union bsca_sigp_ctrl *sigp_ctrl =
133 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
134 union bsca_sigp_ctrl old = *sigp_ctrl;
135
136 expect = old.value;
137 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
138 }
5e044315 139 read_unlock(&vcpu->kvm->arch.sca_lock);
7d43bafc 140 WARN_ON(rc != expect); /* cannot clear? */
a5bd7647
ED		 141}
142
3c038e6b 143int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 144{
145 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
146}
147
d8346b7d
CH		 148static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
149{
150 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
151}
152
48a3e950
CH		 153static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
154{
155 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
156}
157
ba5c1e9b
CO		 158static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
159{
fee0e0fd
DH		 160 return psw_extint_disabled(vcpu) &&
161 psw_ioint_disabled(vcpu) &&
162 psw_mchk_disabled(vcpu);
ba5c1e9b
CO		 163}
164
bb78c5ec
DH		 165static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
166{
167 if (psw_extint_disabled(vcpu) ||
b9224cd7 168 !(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK))
bb78c5ec 169 return 0;
f71d0dc5
DH		 170 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
171 /* No timer interrupts when single stepping */
172 return 0;
bb78c5ec
DH		 173 return 1;
174}
175
b4aec925
DH		 176static int ckc_irq_pending(struct kvm_vcpu *vcpu)
177{
5fe01793
DH		 178 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
179 const u64 ckc = vcpu->arch.sie_block->ckc;
180
b9224cd7 181 if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) {
5fe01793
DH		 182 if ((s64)ckc >= (s64)now)
183 return 0;
184 } else if (ckc >= now) {
b4aec925 185 return 0;
5fe01793 186 }
b4aec925
DH		 187 return ckc_interrupts_enabled(vcpu);
188}
189
190static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
191{
192 return !psw_extint_disabled(vcpu) &&
b9224cd7 193 (vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK);
b4aec925
DH		 194}
195
196static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
197{
4287f247
DH		 198 if (!cpu_timer_interrupts_enabled(vcpu))
199 return 0;
200 return kvm_s390_get_cpu_timer(vcpu) >> 63;
b4aec925
DH		 201}
202
6d3da241
JF		 203static uint64_t isc_to_isc_bits(int isc)
204{
79fd50c6
CH		 205 return (0x80 >> isc) << 24;
206}
207
2496c8e7
MM		 208static inline u32 isc_to_int_word(u8 isc)
209{
210 return ((u32)isc << 27) | 0x80000000;
211}
212
6d3da241 213static inline u8 int_word_to_isc(u32 int_word)
ba5c1e9b 214{
6d3da241
JF		 215 return (int_word & 0x38000000) >> 27;
216}
217
d77e6414
MM		 218/*
219 * To use atomic bitmap functions, we have to provide a bitmap address
220 * that is u64 aligned. However, the ipm might be u32 aligned.
221 * Therefore, we logically start the bitmap at the very beginning of the
222 * struct and fixup the bit number.
223 */
224#define IPM_BIT_OFFSET (offsetof(struct kvm_s390_gisa, ipm) * BITS_PER_BYTE)
225
6cff2e10
MM		 226/**
227 * gisa_set_iam - change the GISA interruption alert mask
228 *
229 * @gisa: gisa to operate on
230 * @iam: new IAM value to use
231 *
232 * Change the IAM atomically with the next alert address and the IPM
233 * of the GISA if the GISA is not part of the GIB alert list. All three
234 * fields are located in the first long word of the GISA.
235 *
236 * Returns: 0 on success
237 * -EBUSY in case the gisa is part of the alert list
238 */
239static inline int gisa_set_iam(struct kvm_s390_gisa *gisa, u8 iam)
240{
241 u64 word, _word;
242
243 do {
244 word = READ_ONCE(gisa->u64.word[0]);
245 if ((u64)gisa != word >> 32)
246 return -EBUSY;
247 _word = (word & ~0xffUL) | iam;
248 } while (cmpxchg(&gisa->u64.word[0], word, _word) != word);
249
250 return 0;
251}
252
174dd4f8
MM		 253/**
254 * gisa_clear_ipm - clear the GISA interruption pending mask
255 *
256 * @gisa: gisa to operate on
257 *
258 * Clear the IPM atomically with the next alert address and the IAM
259 * of the GISA unconditionally. All three fields are located in the
260 * first long word of the GISA.
261 */
262static inline void gisa_clear_ipm(struct kvm_s390_gisa *gisa)
263{
264 u64 word, _word;
265
266 do {
267 word = READ_ONCE(gisa->u64.word[0]);
268 _word = word & ~(0xffUL << 24);
269 } while (cmpxchg(&gisa->u64.word[0], word, _word) != word);
270}
271
9f30f621
MM		 272/**
273 * gisa_get_ipm_or_restore_iam - return IPM or restore GISA IAM
274 *
275 * @gi: gisa interrupt struct to work on
276 *
277 * Atomically restores the interruption alert mask if none of the
278 * relevant ISCs are pending and return the IPM.
279 *
280 * Returns: the relevant pending ISCs
281 */
282static inline u8 gisa_get_ipm_or_restore_iam(struct kvm_s390_gisa_interrupt *gi)
283{
284 u8 pending_mask, alert_mask;
285 u64 word, _word;
286
287 do {
288 word = READ_ONCE(gi->origin->u64.word[0]);
289 alert_mask = READ_ONCE(gi->alert.mask);
290 pending_mask = (u8)(word >> 24) & alert_mask;
291 if (pending_mask)
292 return pending_mask;
293 _word = (word & ~0xffUL) | alert_mask;
294 } while (cmpxchg(&gi->origin->u64.word[0], word, _word) != word);
295
296 return 0;
297}
298
299static inline int gisa_in_alert_list(struct kvm_s390_gisa *gisa)
300{
301 return READ_ONCE(gisa->next_alert) != (u32)(u64)gisa;
302}
303
bb2fb8cd 304static inline void gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
d77e6414
MM		 305{
306 set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
307}
308
bb2fb8cd 309static inline u8 gisa_get_ipm(struct kvm_s390_gisa *gisa)
d77e6414
MM		 310{
311 return READ_ONCE(gisa->ipm);
312}
313
bb2fb8cd 314static inline void gisa_clear_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
d77e6414
MM		 315{
316 clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
317}
318
bb2fb8cd 319static inline int gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
d77e6414
MM		 320{
321 return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
322}
323
8846f317 324static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu)
6d3da241 325{
5f94c58e 326 return vcpu->kvm->arch.float_int.pending_irqs |
8846f317
CB		 327 vcpu->arch.local_int.pending_irqs;
328}
329
330static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
331{
b9fa6d6e
MM		 332 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
333 unsigned long pending_mask;
334
335 pending_mask = pending_irqs_no_gisa(vcpu);
336 if (gi->origin)
337 pending_mask |= gisa_get_ipm(gi->origin) << IRQ_PEND_IO_ISC_7;
338 return pending_mask;
383d0b05
JF		 339}
340
ee739f4b
MM		 341static inline int isc_to_irq_type(unsigned long isc)
342{
c7901a6e 343 return IRQ_PEND_IO_ISC_0 - isc;
ee739f4b
MM		 344}
345
346static inline int irq_type_to_isc(unsigned long irq_type)
347{
c7901a6e 348 return IRQ_PEND_IO_ISC_0 - irq_type;
ee739f4b
MM		 349}
350
6d3da241
JF		 351static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
352 unsigned long active_mask)
353{
354 int i;
355
356 for (i = 0; i <= MAX_ISC; i++)
357 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
ee739f4b 358 active_mask &= ~(1UL << (isc_to_irq_type(i)));
6d3da241
JF		 359
360 return active_mask;
361}
362
363static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
383d0b05 364{
6d3da241
JF		 365 unsigned long active_mask;
366
5f94c58e 367 active_mask = pending_irqs(vcpu);
ffeca0ae
JF		 368 if (!active_mask)
369 return 0;
383d0b05
JF		 370
371 if (psw_extint_disabled(vcpu))
372 active_mask &= ~IRQ_PEND_EXT_MASK;
6d3da241
JF		 373 if (psw_ioint_disabled(vcpu))
374 active_mask &= ~IRQ_PEND_IO_MASK;
375 else
376 active_mask = disable_iscs(vcpu, active_mask);
b9224cd7 377 if (!(vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK))
383d0b05 378 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
b9224cd7 379 if (!(vcpu->arch.sie_block->gcr[0] & CR0_EMERGENCY_SIGNAL_SUBMASK))
383d0b05 380 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
b9224cd7 381 if (!(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK))
383d0b05 382 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
b9224cd7 383 if (!(vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK))
383d0b05 384 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
b9224cd7 385 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK))
6d3da241 386 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
383d0b05
JF		 387 if (psw_mchk_disabled(vcpu))
388 active_mask &= ~IRQ_PEND_MCHK_MASK;
4d62fcc0
QH		 389 /*
390 * Check both floating and local interrupt's cr14 because
391 * bit IRQ_PEND_MCHK_REP could be set in both cases.
392 */
6d3da241 393 if (!(vcpu->arch.sie_block->gcr[14] &
4d62fcc0
QH		 394 (vcpu->kvm->arch.float_int.mchk.cr14 |
395 vcpu->arch.local_int.irq.mchk.cr14)))
6d3da241 396 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
383d0b05 397
6cddd432
DH		 398 /*
399 * STOP irqs will never be actively delivered. They are triggered via
400 * intercept requests and cleared when the stop intercept is performed.
401 */
402 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
403
383d0b05
JF		 404 return active_mask;
405}
406
ba5c1e9b
CO		 407static void __set_cpu_idle(struct kvm_vcpu *vcpu)
408{
ef8f4f49 409 kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT);
246b7218 410 set_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
ba5c1e9b
CO		 411}
412
413static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
414{
9daecfc6 415 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT);
246b7218 416 clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
ba5c1e9b
CO		 417}
418
419static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
420{
9daecfc6
DH		 421 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IO_INT | CPUSTAT_EXT_INT |
422 CPUSTAT_STOP_INT);
ba5c1e9b 423 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 424 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
425
426 if (guestdbg_enabled(vcpu)) {
427 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
428 LCTL_CR10 | LCTL_CR11);
429 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
430 }
ba5c1e9b
CO		 431}
432
6d3da241
JF		 433static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
434{
8846f317 435 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK))
6d3da241 436 return;
b7d45571 437 if (psw_ioint_disabled(vcpu))
2018224d 438 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT);
6d3da241
JF		 439 else
440 vcpu->arch.sie_block->lctl |= LCTL_CR6;
441}
442
383d0b05
JF		 443static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
444{
96723d32 445 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK))
383d0b05
JF		 446 return;
447 if (psw_extint_disabled(vcpu))
2018224d 448 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
383d0b05
JF		 449 else
450 vcpu->arch.sie_block->lctl |= LCTL_CR0;
451}
452
453static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
454{
96723d32 455 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK))
383d0b05
JF		 456 return;
457 if (psw_mchk_disabled(vcpu))
458 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
459 else
460 vcpu->arch.sie_block->lctl |= LCTL_CR14;
461}
462
6cddd432
DH		 463static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
464{
465 if (kvm_s390_is_stop_irq_pending(vcpu))
2018224d 466 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
6cddd432
DH		 467}
468
6d3da241
JF		 469/* Set interception request for non-deliverable interrupts */
470static void set_intercept_indicators(struct kvm_vcpu *vcpu)
383d0b05 471{
6d3da241 472 set_intercept_indicators_io(vcpu);
383d0b05
JF		 473 set_intercept_indicators_ext(vcpu);
474 set_intercept_indicators_mchk(vcpu);
6cddd432 475 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 476}
477
0fb97abe
JF		 478static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
479{
383d0b05 480 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 481 int rc;
482
ccc40c53 483 vcpu->stat.deliver_cputm++;
0fb97abe
JF		 484 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
485 0, 0);
486
487 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
488 (u16 *)__LC_EXT_INT_CODE);
467fc298 489 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 490 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
491 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
492 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
493 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 494 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 495 return rc ? -EFAULT : 0;
0fb97abe
JF		 496}
497
498static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
499{
383d0b05 500 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 501 int rc;
502
ccc40c53 503 vcpu->stat.deliver_ckc++;
0fb97abe
JF		 504 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
505 0, 0);
506
507 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
508 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 509 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 510 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
511 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
512 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
513 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 514 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 515 return rc ? -EFAULT : 0;
0fb97abe
JF		 516}
517
383d0b05 518static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 519{
383d0b05
JF		 520 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
521 struct kvm_s390_ext_info ext;
0fb97abe
JF		 522 int rc;
523
383d0b05
JF		 524 spin_lock(&li->lock);
525 ext = li->irq.ext;
526 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
527 li->irq.ext.ext_params2 = 0;
528 spin_unlock(&li->lock);
529
3f24ba15
CB		 530 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
531 ext.ext_params2);
0fb97abe
JF		 532 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
533 KVM_S390_INT_PFAULT_INIT,
383d0b05 534 0, ext.ext_params2);
0fb97abe
JF		 535
536 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
537 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
538 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
539 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
540 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
541 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 542 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 543 return rc ? -EFAULT : 0;
0fb97abe
JF		 544}
545
d6404ded
DH		 546static int __write_machine_check(struct kvm_vcpu *vcpu,
547 struct kvm_s390_mchk_info *mchk)
548{
549 unsigned long ext_sa_addr;
4e0b1ab7 550 unsigned long lc;
0319dae6 551 freg_t fprs[NUM_FPRS];
ff5dc149 552 union mci mci;
d6404ded
DH		 553 int rc;
554
ff5dc149 555 mci.val = mchk->mcic;
31d8b8d4 556 /* take care of lazy register loading */
0319dae6
DH		 557 save_fpu_regs();
558 save_access_regs(vcpu->run->s.regs.acrs);
80248559
CB		 559 if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
560 save_gs_cb(current->thread.gs_cb);
0319dae6 561
d6404ded 562 /* Extended save area */
916cda1a
MS		 563 rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,
564 sizeof(unsigned long));
4e0b1ab7
FZ		 565 /* Only bits 0 through 63-LC are used for address formation */
566 lc = ext_sa_addr & MCESA_LC_MASK;
567 if (test_kvm_facility(vcpu->kvm, 133)) {
568 switch (lc) {
569 case 0:
570 case 10:
571 ext_sa_addr &= ~0x3ffUL;
572 break;
573 case 11:
574 ext_sa_addr &= ~0x7ffUL;
575 break;
576 case 12:
577 ext_sa_addr &= ~0xfffUL;
578 break;
579 default:
580 ext_sa_addr = 0;
581 break;
582 }
583 } else {
584 ext_sa_addr &= ~0x3ffUL;
585 }
586
ff5dc149
DH		 587 if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
588 if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
589 512))
590 mci.vr = 0;
591 } else {
592 mci.vr = 0;
593 }
4e0b1ab7
FZ		 594 if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133)
595 && (lc == 11 || lc == 12)) {
596 if (write_guest_abs(vcpu, ext_sa_addr + 1024,
597 &vcpu->run->s.regs.gscb, 32))
598 mci.gs = 0;
599 } else {
600 mci.gs = 0;
601 }
d6404ded
DH		 602
603 /* General interruption information */
0319dae6 604 rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
d6404ded
DH		 605 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
606 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
607 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
608 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ff5dc149 609 rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);
d6404ded
DH		 610
611 /* Register-save areas */
0319dae6
DH		 612 if (MACHINE_HAS_VX) {
613 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
614 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
615 } else {
616 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA,
617 vcpu->run->s.regs.fprs, 128);
618 }
619 rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA,
620 vcpu->run->s.regs.gprs, 128);
621 rc |= put_guest_lc(vcpu, current->thread.fpu.fpc,
622 (u32 __user *) __LC_FP_CREG_SAVE_AREA);
623 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr,
624 (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA);
625 rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu),
626 (u64 __user *) __LC_CPU_TIMER_SAVE_AREA);
627 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8,
628 (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA);
629 rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA,
630 &vcpu->run->s.regs.acrs, 64);
631 rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA,
632 &vcpu->arch.sie_block->gcr, 128);
d6404ded
DH		 633
634 /* Extended interruption information */
8953fb08
DH		 635 rc |= put_guest_lc(vcpu, mchk->ext_damage_code,
636 (u32 __user *) __LC_EXT_DAMAGE_CODE);
d6404ded
DH		 637 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
638 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
639 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout,
640 sizeof(mchk->fixed_logout));
641 return rc ? -EFAULT : 0;
642}
643
383d0b05 644static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 645{
6d3da241 646 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
383d0b05 647 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
6d3da241 648 struct kvm_s390_mchk_info mchk = {};
6d3da241
JF		 649 int deliver = 0;
650 int rc = 0;
0fb97abe 651
6d3da241 652 spin_lock(&fi->lock);
383d0b05 653 spin_lock(&li->lock);
6d3da241
JF		 654 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
655 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
656 /*
657 * If there was an exigent machine check pending, then any
658 * repressible machine checks that might have been pending
659 * are indicated along with it, so always clear bits for
660 * repressible and exigent interrupts
661 */
662 mchk = li->irq.mchk;
663 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
664 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
665 memset(&li->irq.mchk, 0, sizeof(mchk));
666 deliver = 1;
667 }
383d0b05 668 /*
6d3da241
JF		 669 * We indicate floating repressible conditions along with
670 * other pending conditions. Channel Report Pending and Channel
671 * Subsystem damage are the only two and and are indicated by
672 * bits in mcic and masked in cr14.
383d0b05 673 */
6d3da241
JF		 674 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
675 mchk.mcic |= fi->mchk.mcic;
676 mchk.cr14 |= fi->mchk.cr14;
677 memset(&fi->mchk, 0, sizeof(mchk));
678 deliver = 1;
679 }
383d0b05 680 spin_unlock(&li->lock);
6d3da241 681 spin_unlock(&fi->lock);
383d0b05 682
6d3da241 683 if (deliver) {
3f24ba15 684 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
6d3da241
JF		 685 mchk.mcic);
686 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
687 KVM_S390_MCHK,
688 mchk.cr14, mchk.mcic);
32de0749 689 vcpu->stat.deliver_machine_check++;
d6404ded 690 rc = __write_machine_check(vcpu, &mchk);
6d3da241 691 }
d6404ded 692 return rc;
0fb97abe
JF		 693}
694
695static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
696{
383d0b05 697 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 698 int rc;
699
3f24ba15 700 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
0fb97abe
JF		 701 vcpu->stat.deliver_restart_signal++;
702 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
703
704 rc = write_guest_lc(vcpu,
c667aeac 705 offsetof(struct lowcore, restart_old_psw),
0fb97abe 706 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
c667aeac 707 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw),
0fb97abe 708 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 709 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 710 return rc ? -EFAULT : 0;
0fb97abe
JF		 711}
712
383d0b05 713static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 714{
383d0b05
JF		 715 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
716 struct kvm_s390_prefix_info prefix;
717
718 spin_lock(&li->lock);
719 prefix = li->irq.prefix;
720 li->irq.prefix.address = 0;
721 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
722 spin_unlock(&li->lock);
0fb97abe 723
0fb97abe
JF		 724 vcpu->stat.deliver_prefix_signal++;
725 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
726 KVM_S390_SIGP_SET_PREFIX,
383d0b05 727 prefix.address, 0);
0fb97abe 728
383d0b05 729 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 730 return 0;
731}
732
383d0b05 733static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 734{
383d0b05 735 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 736 int rc;
383d0b05
JF		 737 int cpu_addr;
738
739 spin_lock(&li->lock);
740 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
741 clear_bit(cpu_addr, li->sigp_emerg_pending);
742 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
743 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
744 spin_unlock(&li->lock);
0fb97abe 745
3f24ba15 746 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
0fb97abe 747 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 748 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
749 cpu_addr, 0);
0fb97abe
JF		 750
751 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
752 (u16 *)__LC_EXT_INT_CODE);
383d0b05 753 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 754 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
755 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
756 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
757 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 758 return rc ? -EFAULT : 0;
0fb97abe
JF		 759}
760
383d0b05 761static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 762{
383d0b05
JF		 763 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
764 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 765 int rc;
766
383d0b05
JF		 767 spin_lock(&li->lock);
768 extcall = li->irq.extcall;
769 li->irq.extcall.code = 0;
770 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
771 spin_unlock(&li->lock);
772
3f24ba15 773 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
0fb97abe
JF		 774 vcpu->stat.deliver_external_call++;
775 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
776 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 777 extcall.code, 0);
0fb97abe
JF		 778
779 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
780 (u16 *)__LC_EXT_INT_CODE);
383d0b05 781 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 782 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
783 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
784 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
785 sizeof(psw_t));
99e20009 786 return rc ? -EFAULT : 0;
0fb97abe
JF		 787}
788
383d0b05 789static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 790{
383d0b05
JF		 791 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
792 struct kvm_s390_pgm_info pgm_info;
a9a846fd 793 int rc = 0, nullifying = false;
634790b8 794 u16 ilen;
8712836b 795
383d0b05
JF		 796 spin_lock(&li->lock);
797 pgm_info = li->irq.pgm;
798 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
799 memset(&li->irq.pgm, 0, sizeof(pgm_info));
800 spin_unlock(&li->lock);
801
634790b8 802 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
0e8bc06a
DH		 803 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
804 pgm_info.code, ilen);
ccc40c53 805 vcpu->stat.deliver_program++;
0fb97abe 806 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 807 pgm_info.code, 0);
0fb97abe 808
383d0b05 809 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 810 case PGM_AFX_TRANSLATION:
811 case PGM_ASX_TRANSLATION:
812 case PGM_EX_TRANSLATION:
813 case PGM_LFX_TRANSLATION:
814 case PGM_LSTE_SEQUENCE:
815 case PGM_LSX_TRANSLATION:
816 case PGM_LX_TRANSLATION:
817 case PGM_PRIMARY_AUTHORITY:
818 case PGM_SECONDARY_AUTHORITY:
a9a846fd
TH		 819 nullifying = true;
820 /* fall through */
8712836b 821 case PGM_SPACE_SWITCH:
383d0b05 822 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 823 (u64 *)__LC_TRANS_EXC_CODE);
824 break;
825 case PGM_ALEN_TRANSLATION:
826 case PGM_ALE_SEQUENCE:
827 case PGM_ASTE_INSTANCE:
828 case PGM_ASTE_SEQUENCE:
829 case PGM_ASTE_VALIDITY:
830 case PGM_EXTENDED_AUTHORITY:
383d0b05 831 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 832 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 833 nullifying = true;
8712836b
DH		 834 break;
835 case PGM_ASCE_TYPE:
836 case PGM_PAGE_TRANSLATION:
837 case PGM_REGION_FIRST_TRANS:
838 case PGM_REGION_SECOND_TRANS:
839 case PGM_REGION_THIRD_TRANS:
840 case PGM_SEGMENT_TRANSLATION:
383d0b05 841 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 842 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 843 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 844 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 845 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 846 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 847 nullifying = true;
8712836b
DH		 848 break;
849 case PGM_MONITOR:
383d0b05 850 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 851 (u16 *)__LC_MON_CLASS_NR);
383d0b05 852 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 853 (u64 *)__LC_MON_CODE);
854 break;
403c8648 855 case PGM_VECTOR_PROCESSING:
8712836b 856 case PGM_DATA:
383d0b05 857 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 858 (u32 *)__LC_DATA_EXC_CODE);
859 break;
860 case PGM_PROTECTION:
383d0b05 861 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 862 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 863 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 864 (u8 *)__LC_EXC_ACCESS_ID);
865 break;
a9a846fd
TH		 866 case PGM_STACK_FULL:
867 case PGM_STACK_EMPTY:
868 case PGM_STACK_SPECIFICATION:
869 case PGM_STACK_TYPE:
870 case PGM_STACK_OPERATION:
871 case PGM_TRACE_TABEL:
872 case PGM_CRYPTO_OPERATION:
873 nullifying = true;
874 break;
8712836b
DH		 875 }
876
383d0b05
JF		 877 if (pgm_info.code & PGM_PER) {
878 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 879 (u8 *) __LC_PER_CODE);
383d0b05 880 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 881 (u8 *)__LC_PER_ATMID);
383d0b05 882 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 883 (u64 *) __LC_PER_ADDRESS);
383d0b05 884 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 885 (u8 *) __LC_PER_ACCESS_ID);
886 }
887
eaa4f416 888 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND))
0e8bc06a 889 kvm_s390_rewind_psw(vcpu, ilen);
a9a846fd 890
0e8bc06a
DH		 891 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
892 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
2ba45968
DH		 893 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
894 (u64 *) __LC_LAST_BREAK);
383d0b05 895 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 896 (u16 *)__LC_PGM_INT_CODE);
897 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
898 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
899 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
900 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 901 return rc ? -EFAULT : 0;
0fb97abe
JF		 902}
903
6d3da241 904static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
0fb97abe 905{
6d3da241
JF		 906 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
907 struct kvm_s390_ext_info ext;
908 int rc = 0;
909
910 spin_lock(&fi->lock);
911 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
912 spin_unlock(&fi->lock);
913 return 0;
914 }
915 ext = fi->srv_signal;
916 memset(&fi->srv_signal, 0, sizeof(ext));
917 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
918 spin_unlock(&fi->lock);
0fb97abe 919
3f24ba15 920 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
6d3da241 921 ext.ext_params);
0fb97abe 922 vcpu->stat.deliver_service_signal++;
6d3da241
JF		 923 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
924 ext.ext_params, 0);
0fb97abe
JF		 925
926 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 927 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 928 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
929 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
930 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
931 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
6d3da241 932 rc |= put_guest_lc(vcpu, ext.ext_params,
0fb97abe 933 (u32 *)__LC_EXT_PARAMS);
6d3da241 934
99e20009 935 return rc ? -EFAULT : 0;
0fb97abe
JF		 936}
937
6d3da241 938static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
0fb97abe 939{
6d3da241
JF		 940 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
941 struct kvm_s390_interrupt_info *inti;
942 int rc = 0;
0fb97abe 943
6d3da241
JF		 944 spin_lock(&fi->lock);
945 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
946 struct kvm_s390_interrupt_info,
947 list);
948 if (inti) {
6d3da241
JF		 949 list_del(&inti->list);
950 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
951 }
952 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
953 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
954 spin_unlock(&fi->lock);
8712836b 955
6d3da241 956 if (inti) {
3f24ba15
CB		 957 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
958 KVM_S390_INT_PFAULT_DONE, 0,
959 inti->ext.ext_params2);
960 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
961 inti->ext.ext_params2);
962
6d3da241
JF		 963 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
964 (u16 *)__LC_EXT_INT_CODE);
965 rc |= put_guest_lc(vcpu, PFAULT_DONE,
966 (u16 *)__LC_EXT_CPU_ADDR);
967 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
968 &vcpu->arch.sie_block->gpsw,
969 sizeof(psw_t));
970 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
971 &vcpu->arch.sie_block->gpsw,
972 sizeof(psw_t));
973 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
974 (u64 *)__LC_EXT_PARAMS2);
975 kfree(inti);
976 }
99e20009 977 return rc ? -EFAULT : 0;
0fb97abe
JF		 978}
979
6d3da241 980static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
0fb97abe 981{
6d3da241
JF		 982 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
983 struct kvm_s390_interrupt_info *inti;
984 int rc = 0;
0fb97abe 985
6d3da241
JF		 986 spin_lock(&fi->lock);
987 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
988 struct kvm_s390_interrupt_info,
989 list);
990 if (inti) {
991 VCPU_EVENT(vcpu, 4,
3f24ba15 992 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
6d3da241 993 inti->ext.ext_params, inti->ext.ext_params2);
ccc40c53 994 vcpu->stat.deliver_virtio++;
6d3da241
JF		 995 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
996 inti->type,
997 inti->ext.ext_params,
998 inti->ext.ext_params2);
999 list_del(&inti->list);
1000 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
1001 }
1002 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
1003 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1004 spin_unlock(&fi->lock);
0fb97abe 1005
6d3da241
JF		 1006 if (inti) {
1007 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
1008 (u16 *)__LC_EXT_INT_CODE);
1009 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
1010 (u16 *)__LC_EXT_CPU_ADDR);
1011 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
1012 &vcpu->arch.sie_block->gpsw,
1013 sizeof(psw_t));
1014 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
1015 &vcpu->arch.sie_block->gpsw,
1016 sizeof(psw_t));
1017 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
1018 (u32 *)__LC_EXT_PARAMS);
1019 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
1020 (u64 *)__LC_EXT_PARAMS2);
1021 kfree(inti);
1022 }
99e20009 1023 return rc ? -EFAULT : 0;
0fb97abe
JF		 1024}
1025
d7c5cb01
MM		 1026static int __do_deliver_io(struct kvm_vcpu *vcpu, struct kvm_s390_io_info *io)
1027{
1028 int rc;
1029
1030 rc = put_guest_lc(vcpu, io->subchannel_id, (u16 *)__LC_SUBCHANNEL_ID);
1031 rc |= put_guest_lc(vcpu, io->subchannel_nr, (u16 *)__LC_SUBCHANNEL_NR);
1032 rc |= put_guest_lc(vcpu, io->io_int_parm, (u32 *)__LC_IO_INT_PARM);
1033 rc |= put_guest_lc(vcpu, io->io_int_word, (u32 *)__LC_IO_INT_WORD);
1034 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
1035 &vcpu->arch.sie_block->gpsw,
1036 sizeof(psw_t));
1037 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
1038 &vcpu->arch.sie_block->gpsw,
1039 sizeof(psw_t));
1040 return rc ? -EFAULT : 0;
1041}
1042
0fb97abe 1043static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
6d3da241 1044 unsigned long irq_type)
0fb97abe 1045{
6d3da241
JF		 1046 struct list_head *isc_list;
1047 struct kvm_s390_float_interrupt *fi;
982cff42 1048 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
6d3da241 1049 struct kvm_s390_interrupt_info *inti = NULL;
d7c5cb01
MM		 1050 struct kvm_s390_io_info io;
1051 u32 isc;
6d3da241 1052 int rc = 0;
0fb97abe 1053
6d3da241 1054 fi = &vcpu->kvm->arch.float_int;
8712836b 1055
6d3da241 1056 spin_lock(&fi->lock);
d7c5cb01
MM		 1057 isc = irq_type_to_isc(irq_type);
1058 isc_list = &fi->lists[isc];
6d3da241
JF		 1059 inti = list_first_entry_or_null(isc_list,
1060 struct kvm_s390_interrupt_info,
1061 list);
1062 if (inti) {
dcc98ea6
CB		 1063 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1064 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)");
1065 else
1066 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x",
1067 inti->io.subchannel_id >> 8,
1068 inti->io.subchannel_id >> 1 & 0x3,
1069 inti->io.subchannel_nr);
1070
ccc40c53 1071 vcpu->stat.deliver_io++;
6d3da241
JF		 1072 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1073 inti->type,
1074 ((__u32)inti->io.subchannel_id << 16) |
1075 inti->io.subchannel_nr,
1076 ((__u64)inti->io.io_int_parm << 32) |
1077 inti->io.io_int_word);
1078 list_del(&inti->list);
1079 fi->counters[FIRQ_CNTR_IO] -= 1;
1080 }
1081 if (list_empty(isc_list))
1082 clear_bit(irq_type, &fi->pending_irqs);
1083 spin_unlock(&fi->lock);
1084
1085 if (inti) {
d7c5cb01 1086 rc = __do_deliver_io(vcpu, &(inti->io));
6d3da241 1087 kfree(inti);
d7c5cb01 1088 goto out;
6d3da241 1089 }
383d0b05 1090
982cff42 1091 if (gi->origin && gisa_tac_ipm_gisc(gi->origin, isc)) {
d7c5cb01
MM		 1092 /*
1093 * in case an adapter interrupt was not delivered
1094 * in SIE context KVM will handle the delivery
1095 */
1096 VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc);
1097 memset(&io, 0, sizeof(io));
2496c8e7 1098 io.io_int_word = isc_to_int_word(isc);
ccc40c53 1099 vcpu->stat.deliver_io++;
d7c5cb01
MM		 1100 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1101 KVM_S390_INT_IO(1, 0, 0, 0),
1102 ((__u32)io.subchannel_id << 16) |
1103 io.subchannel_nr,
1104 ((__u64)io.io_int_parm << 32) |
1105 io.io_int_word);
1106 rc = __do_deliver_io(vcpu, &io);
1107 }
1108out:
1109 return rc;
383d0b05
JF		 1110}
1111
ea5f4969
DH		 1112/* Check whether an external call is pending (deliverable or not) */
1113int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 1114{
ea5f4969 1115 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
4953919f 1116
37c5f6c8 1117 if (!sclp.has_sigpif)
ea5f4969 1118 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 1119
a5bd7647 1120 return sca_ext_call_pending(vcpu, NULL);
4953919f
DH		 1121}
1122
9a022067 1123int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 1124{
4d32ad6b
DH		 1125 if (deliverable_irqs(vcpu))
1126 return 1;
ba5c1e9b 1127
4d32ad6b
DH		 1128 if (kvm_cpu_has_pending_timer(vcpu))
1129 return 1;
ba5c1e9b 1130
ea5f4969 1131 /* external call pending and deliverable */
4d32ad6b 1132 if (kvm_s390_ext_call_pending(vcpu) &&
ea5f4969 1133 !psw_extint_disabled(vcpu) &&
b9224cd7 1134 (vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK))
4d32ad6b 1135 return 1;
4953919f 1136
4d32ad6b
DH		 1137 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
1138 return 1;
1139 return 0;
ba5c1e9b
CO		 1140}
1141
3d80840d
MT		 1142int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1143{
b4aec925 1144 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
3d80840d
MT		 1145}
1146
b3c17f10
DH		 1147static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
1148{
5fe01793
DH		 1149 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
1150 const u64 ckc = vcpu->arch.sie_block->ckc;
1151 u64 cputm, sltime = 0;
b3c17f10
DH		 1152
1153 if (ckc_interrupts_enabled(vcpu)) {
b9224cd7 1154 if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) {
5fe01793
DH		 1155 if ((s64)now < (s64)ckc)
1156 sltime = tod_to_ns((s64)ckc - (s64)now);
1157 } else if (now < ckc) {
1158 sltime = tod_to_ns(ckc - now);
1159 }
1160 /* already expired */
1161 if (!sltime)
b3c17f10
DH		 1162 return 0;
1163 if (cpu_timer_interrupts_enabled(vcpu)) {
1164 cputm = kvm_s390_get_cpu_timer(vcpu);
1165 /* already expired? */
1166 if (cputm >> 63)
1167 return 0;
1168 return min(sltime, tod_to_ns(cputm));
1169 }
1170 } else if (cpu_timer_interrupts_enabled(vcpu)) {
1171 sltime = kvm_s390_get_cpu_timer(vcpu);
1172 /* already expired? */
1173 if (sltime >> 63)
1174 return 0;
1175 }
1176 return sltime;
1177}
1178
ba5c1e9b
CO		 1179int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
1180{
9f30f621 1181 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
b3c17f10 1182 u64 sltime;
ba5c1e9b
CO		 1183
1184 vcpu->stat.exit_wait_state++;
ba5c1e9b 1185
0759d068 1186 /* fast path */
118b862b 1187 if (kvm_arch_vcpu_runnable(vcpu))
0759d068 1188 return 0;
e52b2af5 1189
ba5c1e9b
CO		 1190 if (psw_interrupts_disabled(vcpu)) {
1191 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 1192 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 1193 }
1194
9f30f621
MM		 1195 if (gi->origin &&
1196 (gisa_get_ipm_or_restore_iam(gi) &
1197 vcpu->arch.sie_block->gcr[6] >> 24))
1198 return 0;
1199
b3c17f10
DH		 1200 if (!ckc_interrupts_enabled(vcpu) &&
1201 !cpu_timer_interrupts_enabled(vcpu)) {
ba5c1e9b 1202 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 1203 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 1204 goto no_timer;
1205 }
1206
b3c17f10
DH		 1207 sltime = __calculate_sltime(vcpu);
1208 if (!sltime)
bda343ef
DH		 1209 return 0;
1210
1211 __set_cpu_idle(vcpu);
8b0e1953 1212 hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL);
b3c17f10 1213 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
ba5c1e9b 1214no_timer:
800c1065 1215 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 1216 kvm_vcpu_block(vcpu);
ba5c1e9b 1217 __unset_cpu_idle(vcpu);
800c1065
TH		 1218 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1219
2d00f759 1220 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 1221 return 0;
1222}
1223
0e9c85a5
DH		 1224void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
1225{
3491caf2
CB		 1226 /*
1227 * We cannot move this into the if, as the CPU might be already
1228 * in kvm_vcpu_block without having the waitqueue set (polling)
1229 */
1230 vcpu->valid_wakeup = true;
72e1ad42
CB		 1231 /*
1232 * This is mostly to document, that the read in swait_active could
1233 * be moved before other stores, leading to subtle races.
1234 * All current users do not store or use an atomic like update
1235 */
1236 smp_mb__after_atomic();
8577370f 1237 if (swait_active(&vcpu->wq)) {
0e9c85a5
DH		 1238 /*
1239 * The vcpu gave up the cpu voluntarily, mark it as a good
1240 * yield-candidate.
1241 */
1242 vcpu->preempted = true;
b3dae109 1243 swake_up_one(&vcpu->wq);
ce2e4f0b 1244 vcpu->stat.halt_wakeup++;
0e9c85a5 1245 }
adbf1698
DH		 1246 /*
1247 * The VCPU might not be sleeping but is executing the VSIE. Let's
1248 * kick it, so it leaves the SIE to process the request.
1249 */
1250 kvm_s390_vsie_kick(vcpu);
0e9c85a5
DH		 1251}
1252
ca872302
CB		 1253enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
1254{
1255 struct kvm_vcpu *vcpu;
b3c17f10 1256 u64 sltime;
ca872302
CB		 1257
1258 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
b3c17f10 1259 sltime = __calculate_sltime(vcpu);
ca872302 1260
2d00f759
DH		 1261 /*
1262 * If the monotonic clock runs faster than the tod clock we might be
1263 * woken up too early and have to go back to sleep to avoid deadlocks.
1264 */
b3c17f10 1265 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime)))
2d00f759
DH		 1266 return HRTIMER_RESTART;
1267 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 1268 return HRTIMER_NORESTART;
1269}
ba5c1e9b 1270
2ed10cc1
JF		 1271void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
1272{
1273 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 1274
4ae3c081 1275 spin_lock(&li->lock);
383d0b05
JF		 1276 li->pending_irqs = 0;
1277 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
1278 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 1279 spin_unlock(&li->lock);
4953919f 1280
a5bd7647 1281 sca_clear_ext_call(vcpu);
2ed10cc1
JF		 1282}
1283
614aeab4 1284int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 1285{
180c12fb 1286 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
79395031 1287 int rc = 0;
383d0b05 1288 unsigned long irq_type;
6d3da241 1289 unsigned long irqs;
ba5c1e9b
CO		 1290
1291 __reset_intercept_indicators(vcpu);
ba5c1e9b 1292
383d0b05
JF		 1293 /* pending ckc conditions might have been invalidated */
1294 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
b4aec925 1295 if (ckc_irq_pending(vcpu))
383d0b05
JF		 1296 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1297
b4aec925
DH		 1298 /* pending cpu timer conditions might have been invalidated */
1299 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1300 if (cpu_timer_irq_pending(vcpu))
1301 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1302
ffeca0ae 1303 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
c7901a6e
MM		 1304 /* bits are in the reverse order of interrupt priority */
1305 irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT);
baabee67
DH		 1306 switch (irq_type) {
1307 case IRQ_PEND_IO_ISC_0:
1308 case IRQ_PEND_IO_ISC_1:
1309 case IRQ_PEND_IO_ISC_2:
1310 case IRQ_PEND_IO_ISC_3:
1311 case IRQ_PEND_IO_ISC_4:
1312 case IRQ_PEND_IO_ISC_5:
1313 case IRQ_PEND_IO_ISC_6:
1314 case IRQ_PEND_IO_ISC_7:
6d3da241 1315 rc = __deliver_io(vcpu, irq_type);
baabee67
DH		 1316 break;
1317 case IRQ_PEND_MCHK_EX:
1318 case IRQ_PEND_MCHK_REP:
1319 rc = __deliver_machine_check(vcpu);
1320 break;
1321 case IRQ_PEND_PROG:
1322 rc = __deliver_prog(vcpu);
1323 break;
1324 case IRQ_PEND_EXT_EMERGENCY:
1325 rc = __deliver_emergency_signal(vcpu);
1326 break;
1327 case IRQ_PEND_EXT_EXTERNAL:
1328 rc = __deliver_external_call(vcpu);
1329 break;
1330 case IRQ_PEND_EXT_CLOCK_COMP:
1331 rc = __deliver_ckc(vcpu);
1332 break;
1333 case IRQ_PEND_EXT_CPU_TIMER:
1334 rc = __deliver_cpu_timer(vcpu);
1335 break;
1336 case IRQ_PEND_RESTART:
1337 rc = __deliver_restart(vcpu);
1338 break;
1339 case IRQ_PEND_SET_PREFIX:
1340 rc = __deliver_set_prefix(vcpu);
1341 break;
1342 case IRQ_PEND_PFAULT_INIT:
1343 rc = __deliver_pfault_init(vcpu);
1344 break;
1345 case IRQ_PEND_EXT_SERVICE:
1346 rc = __deliver_service(vcpu);
1347 break;
1348 case IRQ_PEND_PFAULT_DONE:
1349 rc = __deliver_pfault_done(vcpu);
1350 break;
1351 case IRQ_PEND_VIRTIO:
1352 rc = __deliver_virtio(vcpu);
1353 break;
1354 default:
1355 WARN_ONCE(1, "Unknown pending irq type %ld", irq_type);
1356 clear_bit(irq_type, &li->pending_irqs);
383d0b05 1357 }
ffeca0ae 1358 }
383d0b05 1359
6d3da241 1360 set_intercept_indicators(vcpu);
79395031
JF		 1361
1362 return rc;
ba5c1e9b
CO		 1363}
1364
383d0b05 1365static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1366{
1367 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1368
ccc40c53 1369 vcpu->stat.inject_program++;
ed2afcfa
DH		 1370 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1371 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1372 irq->u.pgm.code, 0);
1373
634790b8
DH		 1374 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) {
1375 /* auto detection if no valid ILC was given */
1376 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK;
1377 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu);
1378 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID;
1379 }
1380
238293b1
DH		 1381 if (irq->u.pgm.code == PGM_PER) {
1382 li->irq.pgm.code |= PGM_PER;
634790b8 1383 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1384 /* only modify PER related information */
1385 li->irq.pgm.per_address = irq->u.pgm.per_address;
1386 li->irq.pgm.per_code = irq->u.pgm.per_code;
1387 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1388 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1389 } else if (!(irq->u.pgm.code & PGM_PER)) {
1390 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1391 irq->u.pgm.code;
634790b8 1392 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1393 /* only modify non-PER information */
1394 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1395 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1396 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1397 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1398 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1399 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1400 } else {
1401 li->irq.pgm = irq->u.pgm;
1402 }
9185124e 1403 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 1404 return 0;
1405}
1406
383d0b05 1407static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1408{
1409 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1410
ccc40c53 1411 vcpu->stat.inject_pfault_init++;
3f24ba15
CB		 1412 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1413 irq->u.ext.ext_params2);
383d0b05
JF		 1414 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1415 irq->u.ext.ext_params,
ed2afcfa 1416 irq->u.ext.ext_params2);
383d0b05
JF		 1417
1418 li->irq.ext = irq->u.ext;
1419 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
2018224d 1420 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1421 return 0;
1422}
1423
0675d92d 1424static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1425{
1426 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1427 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1428 uint16_t src_id = irq->u.extcall.code;
0146a7b0 1429
ccc40c53 1430 vcpu->stat.inject_external_call++;
3f24ba15 1431 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
ea5f4969 1432 src_id);
383d0b05 1433 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ed2afcfa 1434 src_id, 0);
ea5f4969
DH		 1435
1436 /* sending vcpu invalid */
152e9f65 1437 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
ea5f4969
DH		 1438 return -EINVAL;
1439
37c5f6c8 1440 if (sclp.has_sigpif)
a5bd7647 1441 return sca_inject_ext_call(vcpu, src_id);
383d0b05 1442
b938eace 1443 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
ea5f4969 1444 return -EBUSY;
383d0b05 1445 *extcall = irq->u.extcall;
2018224d 1446 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1447 return 0;
1448}
1449
383d0b05 1450static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1451{
1452 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1453 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0 1454
ccc40c53 1455 vcpu->stat.inject_set_prefix++;
ed2afcfa 1456 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
556cc0da 1457 irq->u.prefix.address);
383d0b05 1458 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
ed2afcfa 1459 irq->u.prefix.address, 0);
383d0b05 1460
a3a9c59a
DH		 1461 if (!is_vcpu_stopped(vcpu))
1462 return -EBUSY;
1463
383d0b05
JF		 1464 *prefix = irq->u.prefix;
1465 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1466 return 0;
1467}
1468
6cddd432 1469#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1470static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1471{
1472 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1473 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1474 int rc = 0;
0146a7b0 1475
ccc40c53 1476 vcpu->stat.inject_stop_signal++;
ed2afcfa 1477 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
383d0b05 1478
2822545f
DH		 1479 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1480 return -EINVAL;
1481
6cddd432
DH		 1482 if (is_vcpu_stopped(vcpu)) {
1483 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1484 rc = kvm_s390_store_status_unloaded(vcpu,
1485 KVM_S390_STORE_STATUS_NOADDR);
1486 return rc;
1487 }
1488
1489 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1490 return -EBUSY;
2822545f 1491 stop->flags = irq->u.stop.flags;
2018224d 1492 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1493 return 0;
1494}
1495
1496static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1497 struct kvm_s390_irq *irq)
0146a7b0
JF		 1498{
1499 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1500
ccc40c53 1501 vcpu->stat.inject_restart++;
3f24ba15 1502 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
ed2afcfa 1503 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
383d0b05
JF		 1504
1505 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1506 return 0;
1507}
1508
1509static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1510 struct kvm_s390_irq *irq)
0146a7b0
JF		 1511{
1512 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1513
ccc40c53 1514 vcpu->stat.inject_emergency_signal++;
3f24ba15 1515 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
383d0b05
JF		 1516 irq->u.emerg.code);
1517 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
ed2afcfa 1518 irq->u.emerg.code, 0);
383d0b05 1519
b85de33a
DH		 1520 /* sending vcpu invalid */
1521 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1522 return -EINVAL;
1523
49538d12 1524 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1525 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
2018224d 1526 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1527 return 0;
1528}
1529
383d0b05 1530static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1531{
1532 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1533 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0 1534
ccc40c53 1535 vcpu->stat.inject_mchk++;
3f24ba15 1536 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
556cc0da 1537 irq->u.mchk.mcic);
383d0b05 1538 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
ed2afcfa 1539 irq->u.mchk.mcic);
383d0b05
JF		 1540
1541 /*
fc2020cf
JF		 1542 * Because repressible machine checks can be indicated along with
1543 * exigent machine checks (PoP, Chapter 11, Interruption action)
1544 * we need to combine cr14, mcic and external damage code.
1545 * Failing storage address and the logout area should not be or'ed
1546 * together, we just indicate the last occurrence of the corresponding
1547 * machine check
383d0b05 1548 */
fc2020cf 1549 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1550 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1551 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1552 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1553 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1554 sizeof(mchk->fixed_logout));
383d0b05
JF		 1555 if (mchk->mcic & MCHK_EX_MASK)
1556 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1557 else if (mchk->mcic & MCHK_REP_MASK)
1558 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1559 return 0;
1560}
1561
383d0b05 1562static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1563{
1564 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1565
ccc40c53 1566 vcpu->stat.inject_ckc++;
3f24ba15 1567 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
383d0b05 1568 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
ed2afcfa 1569 0, 0);
383d0b05
JF		 1570
1571 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
2018224d 1572 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1573 return 0;
1574}
1575
383d0b05 1576static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1577{
1578 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1579
ccc40c53 1580 vcpu->stat.inject_cputm++;
3f24ba15 1581 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
383d0b05 1582 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
ed2afcfa 1583 0, 0);
383d0b05
JF		 1584
1585 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
2018224d 1586 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
ba5c1e9b
CO		 1587 return 0;
1588}
1589
6d3da241
JF		 1590static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1591 int isc, u32 schid)
1592{
1593 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1594 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1595 struct kvm_s390_interrupt_info *iter;
1596 u16 id = (schid & 0xffff0000U) >> 16;
1597 u16 nr = schid & 0x0000ffffU;
1598
1599 spin_lock(&fi->lock);
1600 list_for_each_entry(iter, isc_list, list) {
1601 if (schid && (id != iter->io.subchannel_id ||
1602 nr != iter->io.subchannel_nr))
1603 continue;
1604 /* found an appropriate entry */
1605 list_del_init(&iter->list);
1606 fi->counters[FIRQ_CNTR_IO] -= 1;
1607 if (list_empty(isc_list))
ee739f4b 1608 clear_bit(isc_to_irq_type(isc), &fi->pending_irqs);
6d3da241
JF		 1609 spin_unlock(&fi->lock);
1610 return iter;
1611 }
1612 spin_unlock(&fi->lock);
1613 return NULL;
1614}
383d0b05 1615
4b35f65e
MM		 1616static struct kvm_s390_interrupt_info *get_top_io_int(struct kvm *kvm,
1617 u64 isc_mask, u32 schid)
1618{
1619 struct kvm_s390_interrupt_info *inti = NULL;
1620 int isc;
1621
1622 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1623 if (isc_mask & isc_to_isc_bits(isc))
1624 inti = get_io_int(kvm, isc, schid);
1625 }
1626 return inti;
1627}
1628
1629static int get_top_gisa_isc(struct kvm *kvm, u64 isc_mask, u32 schid)
1630{
982cff42 1631 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
4b35f65e
MM		 1632 unsigned long active_mask;
1633 int isc;
1634
1635 if (schid)
1636 goto out;
982cff42 1637 if (!gi->origin)
4b35f65e
MM		 1638 goto out;
1639
982cff42 1640 active_mask = (isc_mask & gisa_get_ipm(gi->origin) << 24) << 32;
4b35f65e
MM		 1641 while (active_mask) {
1642 isc = __fls(active_mask) ^ (BITS_PER_LONG - 1);
982cff42 1643 if (gisa_tac_ipm_gisc(gi->origin, isc))
4b35f65e
MM		 1644 return isc;
1645 clear_bit_inv(isc, &active_mask);
1646 }
1647out:
1648 return -EINVAL;
1649}
1650
6d3da241
JF		 1651/*
1652 * Dequeue and return an I/O interrupt matching any of the interruption
1653 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
4b35f65e
MM		 1654 * Take into account the interrupts pending in the interrupt list and in GISA.
1655 *
1656 * Note that for a guest that does not enable I/O interrupts
1657 * but relies on TPI, a flood of classic interrupts may starve
1658 * out adapter interrupts on the same isc. Linux does not do
1659 * that, and it is possible to work around the issue by configuring
1660 * different iscs for classic and adapter interrupts in the guest,
1661 * but we may want to revisit this in the future.
6d3da241 1662 */
fa6b7fe9 1663struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241
JF		 1664 u64 isc_mask, u32 schid)
1665{
982cff42 1666 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
4b35f65e 1667 struct kvm_s390_interrupt_info *inti, *tmp_inti;
6d3da241
JF		 1668 int isc;
1669
4b35f65e
MM		 1670 inti = get_top_io_int(kvm, isc_mask, schid);
1671
1672 isc = get_top_gisa_isc(kvm, isc_mask, schid);
1673 if (isc < 0)
1674 /* no AI in GISA */
1675 goto out;
1676
1677 if (!inti)
1678 /* AI in GISA but no classical IO int */
1679 goto gisa_out;
1680
1681 /* both types of interrupts present */
1682 if (int_word_to_isc(inti->io.io_int_word) <= isc) {
1683 /* classical IO int with higher priority */
982cff42 1684 gisa_set_ipm_gisc(gi->origin, isc);
4b35f65e 1685 goto out;
6d3da241 1686 }
4b35f65e
MM		 1687gisa_out:
1688 tmp_inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1689 if (tmp_inti) {
1690 tmp_inti->type = KVM_S390_INT_IO(1, 0, 0, 0);
1691 tmp_inti->io.io_int_word = isc_to_int_word(isc);
1692 if (inti)
1693 kvm_s390_reinject_io_int(kvm, inti);
1694 inti = tmp_inti;
1695 } else
982cff42 1696 gisa_set_ipm_gisc(gi->origin, isc);
4b35f65e 1697out:
6d3da241
JF		 1698 return inti;
1699}
1700
1701#define SCCB_MASK 0xFFFFFFF8
1702#define SCCB_EVENT_PENDING 0x3
1703
1704static int __inject_service(struct kvm *kvm,
1705 struct kvm_s390_interrupt_info *inti)
1706{
1707 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1708
ccc40c53 1709 kvm->stat.inject_service_signal++;
6d3da241
JF		 1710 spin_lock(&fi->lock);
1711 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1712 /*
1713 * Early versions of the QEMU s390 bios will inject several
1714 * service interrupts after another without handling a
1715 * condition code indicating busy.
1716 * We will silently ignore those superfluous sccb values.
1717 * A future version of QEMU will take care of serialization
1718 * of servc requests
1719 */
1720 if (fi->srv_signal.ext_params & SCCB_MASK)
1721 goto out;
1722 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1723 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1724out:
1725 spin_unlock(&fi->lock);
1726 kfree(inti);
1727 return 0;
1728}
1729
1730static int __inject_virtio(struct kvm *kvm,
1731 struct kvm_s390_interrupt_info *inti)
1732{
1733 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1734
ccc40c53 1735 kvm->stat.inject_virtio++;
6d3da241
JF		 1736 spin_lock(&fi->lock);
1737 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1738 spin_unlock(&fi->lock);
1739 return -EBUSY;
1740 }
1741 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1742 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1743 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1744 spin_unlock(&fi->lock);
1745 return 0;
1746}
1747
1748static int __inject_pfault_done(struct kvm *kvm,
1749 struct kvm_s390_interrupt_info *inti)
1750{
1751 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1752
ccc40c53 1753 kvm->stat.inject_pfault_done++;
6d3da241
JF		 1754 spin_lock(&fi->lock);
1755 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1756 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1757 spin_unlock(&fi->lock);
1758 return -EBUSY;
1759 }
1760 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1761 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1762 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1763 spin_unlock(&fi->lock);
1764 return 0;
1765}
1766
1767#define CR_PENDING_SUBCLASS 28
1768static int __inject_float_mchk(struct kvm *kvm,
1769 struct kvm_s390_interrupt_info *inti)
1770{
1771 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1772
ccc40c53 1773 kvm->stat.inject_float_mchk++;
6d3da241
JF		 1774 spin_lock(&fi->lock);
1775 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1776 fi->mchk.mcic |= inti->mchk.mcic;
1777 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1778 spin_unlock(&fi->lock);
1779 kfree(inti);
1780 return 0;
1781}
1782
1783static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
fa6b7fe9 1784{
982cff42 1785 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
fa6b7fe9 1786 struct kvm_s390_float_interrupt *fi;
6d3da241
JF		 1787 struct list_head *list;
1788 int isc;
fa6b7fe9 1789
ccc40c53 1790 kvm->stat.inject_io++;
d7c5cb01
MM		 1791 isc = int_word_to_isc(inti->io.io_int_word);
1792
982cff42 1793 if (gi->origin && inti->type & KVM_S390_INT_IO_AI_MASK) {
d7c5cb01 1794 VM_EVENT(kvm, 4, "%s isc %1u", "inject: I/O (AI/gisa)", isc);
982cff42 1795 gisa_set_ipm_gisc(gi->origin, isc);
d7c5cb01
MM		 1796 kfree(inti);
1797 return 0;
1798 }
1799
fa6b7fe9
CH		 1800 fi = &kvm->arch.float_int;
1801 spin_lock(&fi->lock);
6d3da241
JF		 1802 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1803 spin_unlock(&fi->lock);
1804 return -EBUSY;
a91b8ebe 1805 }
6d3da241
JF		 1806 fi->counters[FIRQ_CNTR_IO] += 1;
1807
dcc98ea6
CB		 1808 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1809 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)");
1810 else
1811 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x",
1812 inti->io.subchannel_id >> 8,
1813 inti->io.subchannel_id >> 1 & 0x3,
1814 inti->io.subchannel_nr);
6d3da241
JF		 1815 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1816 list_add_tail(&inti->list, list);
ee739f4b 1817 set_bit(isc_to_irq_type(isc), &fi->pending_irqs);
fa6b7fe9 1818 spin_unlock(&fi->lock);
6d3da241 1819 return 0;
fa6b7fe9 1820}
ba5c1e9b 1821
96e0ed23
DH		 1822/*
1823 * Find a destination VCPU for a floating irq and kick it.
1824 */
1825static void __floating_irq_kick(struct kvm *kvm, u64 type)
ba5c1e9b 1826{
96e0ed23
DH		 1827 struct kvm_vcpu *dst_vcpu;
1828 int sigcpu, online_vcpus, nr_tries = 0;
1829
1830 online_vcpus = atomic_read(&kvm->online_vcpus);
1831 if (!online_vcpus)
1832 return;
1833
1834 /* find idle VCPUs first, then round robin */
246b7218 1835 sigcpu = find_first_bit(kvm->arch.idle_mask, online_vcpus);
96e0ed23
DH		 1836 if (sigcpu == online_vcpus) {
1837 do {
246b7218
MM		 1838 sigcpu = kvm->arch.float_int.next_rr_cpu++;
1839 kvm->arch.float_int.next_rr_cpu %= online_vcpus;
96e0ed23
DH		 1840 /* avoid endless loops if all vcpus are stopped */
1841 if (nr_tries++ >= online_vcpus)
1842 return;
1843 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1844 }
1845 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1846
1847 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
96e0ed23
DH		 1848 switch (type) {
1849 case KVM_S390_MCHK:
2018224d 1850 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT);
96e0ed23
DH		 1851 break;
1852 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
982cff42
MM		 1853 if (!(type & KVM_S390_INT_IO_AI_MASK &&
1854 kvm->arch.gisa_int.origin))
a9810327 1855 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT);
96e0ed23
DH		 1856 break;
1857 default:
2018224d 1858 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT);
96e0ed23
DH		 1859 break;
1860 }
96e0ed23
DH		 1861 kvm_s390_vcpu_wakeup(dst_vcpu);
1862}
1863
1864static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1865{
6d3da241
JF		 1866 u64 type = READ_ONCE(inti->type);
1867 int rc;
ba5c1e9b 1868
6d3da241
JF		 1869 switch (type) {
1870 case KVM_S390_MCHK:
1871 rc = __inject_float_mchk(kvm, inti);
1872 break;
1873 case KVM_S390_INT_VIRTIO:
1874 rc = __inject_virtio(kvm, inti);
1875 break;
1876 case KVM_S390_INT_SERVICE:
1877 rc = __inject_service(kvm, inti);
1878 break;
1879 case KVM_S390_INT_PFAULT_DONE:
1880 rc = __inject_pfault_done(kvm, inti);
1881 break;
1882 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1883 rc = __inject_io(kvm, inti);
1884 break;
1885 default:
a91b8ebe 1886 rc = -EINVAL;
c05c4186 1887 }
6d3da241
JF		 1888 if (rc)
1889 return rc;
1890
96e0ed23 1891 __floating_irq_kick(kvm, type);
6d3da241 1892 return 0;
c05c4186
JF		 1893}
1894
1895int kvm_s390_inject_vm(struct kvm *kvm,
1896 struct kvm_s390_interrupt *s390int)
1897{
1898 struct kvm_s390_interrupt_info *inti;
428d53be 1899 int rc;
c05c4186 1900
ba5c1e9b
CO		 1901 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1902 if (!inti)
1903 return -ENOMEM;
1904
c05c4186
JF		 1905 inti->type = s390int->type;
1906 switch (inti->type) {
ba5c1e9b 1907 case KVM_S390_INT_VIRTIO:
33e19115 1908 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1909 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1910 inti->ext.ext_params = s390int->parm;
1911 inti->ext.ext_params2 = s390int->parm64;
1912 break;
1913 case KVM_S390_INT_SERVICE:
3f24ba15 1914 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1915 inti->ext.ext_params = s390int->parm;
1916 break;
3c038e6b 1917 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 1918 inti->ext.ext_params2 = s390int->parm64;
1919 break;
48a3e950 1920 case KVM_S390_MCHK:
3f24ba15 1921 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
48a3e950 1922 s390int->parm64);
48a3e950
CH		 1923 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1924 inti->mchk.mcic = s390int->parm64;
1925 break;
d8346b7d 1926 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
d8346b7d
CH		 1927 inti->io.subchannel_id = s390int->parm >> 16;
1928 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1929 inti->io.io_int_parm = s390int->parm64 >> 32;
1930 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1931 break;
ba5c1e9b
CO		 1932 default:
1933 kfree(inti);
1934 return -EINVAL;
1935 }
ade38c31
CH		 1936 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1937 2);
ba5c1e9b 1938
428d53be
DH		 1939 rc = __inject_vm(kvm, inti);
1940 if (rc)
1941 kfree(inti);
1942 return rc;
ba5c1e9b
CO		 1943}
1944
15462e37 1945int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 1946 struct kvm_s390_interrupt_info *inti)
1947{
15462e37 1948 return __inject_vm(kvm, inti);
2f32d4ea
CH		 1949}
1950
383d0b05
JF		 1951int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1952 struct kvm_s390_irq *irq)
1953{
1954 irq->type = s390int->type;
1955 switch (irq->type) {
1956 case KVM_S390_PROGRAM_INT:
1957 if (s390int->parm & 0xffff0000)
1958 return -EINVAL;
1959 irq->u.pgm.code = s390int->parm;
1960 break;
1961 case KVM_S390_SIGP_SET_PREFIX:
1962 irq->u.prefix.address = s390int->parm;
1963 break;
2822545f
DH		 1964 case KVM_S390_SIGP_STOP:
1965 irq->u.stop.flags = s390int->parm;
1966 break;
383d0b05 1967 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 1968 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1969 return -EINVAL;
1970 irq->u.extcall.code = s390int->parm;
1971 break;
1972 case KVM_S390_INT_EMERGENCY:
94d1f564 1973 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1974 return -EINVAL;
1975 irq->u.emerg.code = s390int->parm;
1976 break;
1977 case KVM_S390_MCHK:
1978 irq->u.mchk.mcic = s390int->parm64;
1979 break;
1980 }
1981 return 0;
1982}
1983
6cddd432
DH		 1984int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1985{
1986 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1987
1988 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1989}
1990
1991void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1992{
1993 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1994
1995 spin_lock(&li->lock);
1996 li->irq.stop.flags = 0;
1997 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1998 spin_unlock(&li->lock);
1999}
2000
79e87a10 2001static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 2002{
0146a7b0 2003 int rc;
ba5c1e9b 2004
383d0b05 2005 switch (irq->type) {
ba5c1e9b 2006 case KVM_S390_PROGRAM_INT:
383d0b05 2007 rc = __inject_prog(vcpu, irq);
ba5c1e9b 2008 break;
b7e6e4d3 2009 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 2010 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 2011 break;
ba5c1e9b 2012 case KVM_S390_SIGP_STOP:
383d0b05 2013 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 2014 break;
ba5c1e9b 2015 case KVM_S390_RESTART:
383d0b05 2016 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 2017 break;
e029ae5b 2018 case KVM_S390_INT_CLOCK_COMP:
383d0b05 2019 rc = __inject_ckc(vcpu);
0146a7b0 2020 break;
e029ae5b 2021 case KVM_S390_INT_CPU_TIMER:
383d0b05 2022 rc = __inject_cpu_timer(vcpu);
82a12737 2023 break;
7697e71f 2024 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 2025 rc = __inject_extcall(vcpu, irq);
82a12737 2026 break;
ba5c1e9b 2027 case KVM_S390_INT_EMERGENCY:
383d0b05 2028 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 2029 break;
48a3e950 2030 case KVM_S390_MCHK:
383d0b05 2031 rc = __inject_mchk(vcpu, irq);
48a3e950 2032 break;
3c038e6b 2033 case KVM_S390_INT_PFAULT_INIT:
383d0b05 2034 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 2035 break;
ba5c1e9b
CO		 2036 case KVM_S390_INT_VIRTIO:
2037 case KVM_S390_INT_SERVICE:
d8346b7d 2038 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 2039 default:
0146a7b0 2040 rc = -EINVAL;
ba5c1e9b 2041 }
79e87a10
JF		 2042
2043 return rc;
2044}
2045
2046int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
2047{
2048 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2049 int rc;
2050
2051 spin_lock(&li->lock);
2052 rc = do_inject_vcpu(vcpu, irq);
4ae3c081 2053 spin_unlock(&li->lock);
0146a7b0
JF		 2054 if (!rc)
2055 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 2056 return rc;
ba5c1e9b 2057}
c05c4186 2058
6d3da241 2059static inline void clear_irq_list(struct list_head *_list)
c05c4186 2060{
6d3da241 2061 struct kvm_s390_interrupt_info *inti, *n;
c05c4186 2062
6d3da241 2063 list_for_each_entry_safe(inti, n, _list, list) {
c05c4186
JF		 2064 list_del(&inti->list);
2065 kfree(inti);
2066 }
c05c4186
JF		 2067}
2068
94aa033e
JF		 2069static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
2070 struct kvm_s390_irq *irq)
c05c4186 2071{
94aa033e 2072 irq->type = inti->type;
c05c4186 2073 switch (inti->type) {
3c038e6b
DD		 2074 case KVM_S390_INT_PFAULT_INIT:
2075 case KVM_S390_INT_PFAULT_DONE:
c05c4186 2076 case KVM_S390_INT_VIRTIO:
94aa033e 2077 irq->u.ext = inti->ext;
c05c4186
JF		 2078 break;
2079 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 2080 irq->u.io = inti->io;
c05c4186 2081 break;
c05c4186 2082 }
c05c4186
JF		 2083}
2084
6d3da241
JF		 2085void kvm_s390_clear_float_irqs(struct kvm *kvm)
2086{
2087 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2088 int i;
2089
2090 spin_lock(&fi->lock);
f2ae45ed
JF		 2091 fi->pending_irqs = 0;
2092 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
2093 memset(&fi->mchk, 0, sizeof(fi->mchk));
6d3da241
JF		 2094 for (i = 0; i < FIRQ_LIST_COUNT; i++)
2095 clear_irq_list(&fi->lists[i]);
2096 for (i = 0; i < FIRQ_MAX_COUNT; i++)
2097 fi->counters[i] = 0;
2098 spin_unlock(&fi->lock);
24160af6 2099 kvm_s390_gisa_clear(kvm);
6d3da241
JF		 2100};
2101
94aa033e 2102static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186 2103{
982cff42 2104 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
c05c4186
JF		 2105 struct kvm_s390_interrupt_info *inti;
2106 struct kvm_s390_float_interrupt *fi;
94aa033e 2107 struct kvm_s390_irq *buf;
6d3da241 2108 struct kvm_s390_irq *irq;
94aa033e 2109 int max_irqs;
c05c4186
JF		 2110 int ret = 0;
2111 int n = 0;
6d3da241 2112 int i;
c05c4186 2113
94aa033e
JF		 2114 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
2115 return -EINVAL;
2116
2117 /*
2118 * We are already using -ENOMEM to signal
2119 * userspace it may retry with a bigger buffer,
2120 * so we need to use something else for this case
2121 */
2122 buf = vzalloc(len);
2123 if (!buf)
2124 return -ENOBUFS;
2125
2126 max_irqs = len / sizeof(struct kvm_s390_irq);
2127
982cff42 2128 if (gi->origin && gisa_get_ipm(gi->origin)) {
24160af6
MM		 2129 for (i = 0; i <= MAX_ISC; i++) {
2130 if (n == max_irqs) {
2131 /* signal userspace to try again */
2132 ret = -ENOMEM;
2133 goto out_nolock;
2134 }
982cff42 2135 if (gisa_tac_ipm_gisc(gi->origin, i)) {
24160af6
MM		 2136 irq = (struct kvm_s390_irq *) &buf[n];
2137 irq->type = KVM_S390_INT_IO(1, 0, 0, 0);
2138 irq->u.io.io_int_word = isc_to_int_word(i);
2139 n++;
2140 }
2141 }
2142 }
c05c4186
JF		 2143 fi = &kvm->arch.float_int;
2144 spin_lock(&fi->lock);
6d3da241
JF		 2145 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
2146 list_for_each_entry(inti, &fi->lists[i], list) {
2147 if (n == max_irqs) {
2148 /* signal userspace to try again */
2149 ret = -ENOMEM;
2150 goto out;
2151 }
2152 inti_to_irq(inti, &buf[n]);
2153 n++;
2154 }
2155 }
2156 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
94aa033e 2157 if (n == max_irqs) {
c05c4186
JF		 2158 /* signal userspace to try again */
2159 ret = -ENOMEM;
6d3da241 2160 goto out;
c05c4186 2161 }
6d3da241
JF		 2162 irq = (struct kvm_s390_irq *) &buf[n];
2163 irq->type = KVM_S390_INT_SERVICE;
2164 irq->u.ext = fi->srv_signal;
c05c4186
JF		 2165 n++;
2166 }
6d3da241
JF		 2167 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
2168 if (n == max_irqs) {
2169 /* signal userspace to try again */
2170 ret = -ENOMEM;
2171 goto out;
2172 }
2173 irq = (struct kvm_s390_irq *) &buf[n];
2174 irq->type = KVM_S390_MCHK;
2175 irq->u.mchk = fi->mchk;
2176 n++;
2177}
2178
2179out:
c05c4186 2180 spin_unlock(&fi->lock);
24160af6 2181out_nolock:
94aa033e
JF		 2182 if (!ret && n > 0) {
2183 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
2184 ret = -EFAULT;
2185 }
2186 vfree(buf);
c05c4186
JF		 2187
2188 return ret < 0 ? ret : n;
2189}
2190
2c1a48f2
YMZ		 2191static int flic_ais_mode_get_all(struct kvm *kvm, struct kvm_device_attr *attr)
2192{
2193 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2194 struct kvm_s390_ais_all ais;
2195
2196 if (attr->attr < sizeof(ais))
2197 return -EINVAL;
2198
2199 if (!test_kvm_facility(kvm, 72))
2200 return -ENOTSUPP;
2201
2202 mutex_lock(&fi->ais_lock);
2203 ais.simm = fi->simm;
2204 ais.nimm = fi->nimm;
2205 mutex_unlock(&fi->ais_lock);
2206
2207 if (copy_to_user((void __user *)attr->addr, &ais, sizeof(ais)))
2208 return -EFAULT;
2209
2210 return 0;
2211}
2212
c05c4186
JF		 2213static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2214{
2215 int r;
2216
2217 switch (attr->group) {
2218 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 2219 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 2220 attr->attr);
2221 break;
2c1a48f2
YMZ		 2222 case KVM_DEV_FLIC_AISM_ALL:
2223 r = flic_ais_mode_get_all(dev->kvm, attr);
2224 break;
c05c4186
JF		 2225 default:
2226 r = -EINVAL;
2227 }
2228
2229 return r;
2230}
2231
2232static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
2233 u64 addr)
2234{
2235 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
2236 void *target = NULL;
2237 void __user *source;
2238 u64 size;
2239
2240 if (get_user(inti->type, (u64 __user *)addr))
2241 return -EFAULT;
2242
2243 switch (inti->type) {
3c038e6b
DD		 2244 case KVM_S390_INT_PFAULT_INIT:
2245 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 2246 case KVM_S390_INT_VIRTIO:
2247 case KVM_S390_INT_SERVICE:
2248 target = (void *) &inti->ext;
2249 source = &uptr->u.ext;
2250 size = sizeof(inti->ext);
2251 break;
2252 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
2253 target = (void *) &inti->io;
2254 source = &uptr->u.io;
2255 size = sizeof(inti->io);
2256 break;
2257 case KVM_S390_MCHK:
2258 target = (void *) &inti->mchk;
2259 source = &uptr->u.mchk;
2260 size = sizeof(inti->mchk);
2261 break;
2262 default:
2263 return -EINVAL;
2264 }
2265
2266 if (copy_from_user(target, source, size))
2267 return -EFAULT;
2268
2269 return 0;
2270}
2271
2272static int enqueue_floating_irq(struct kvm_device *dev,
2273 struct kvm_device_attr *attr)
2274{
2275 struct kvm_s390_interrupt_info *inti = NULL;
2276 int r = 0;
2277 int len = attr->attr;
2278
2279 if (len % sizeof(struct kvm_s390_irq) != 0)
2280 return -EINVAL;
2281 else if (len > KVM_S390_FLIC_MAX_BUFFER)
2282 return -EINVAL;
2283
2284 while (len >= sizeof(struct kvm_s390_irq)) {
2285 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
2286 if (!inti)
2287 return -ENOMEM;
2288
2289 r = copy_irq_from_user(inti, attr->addr);
2290 if (r) {
2291 kfree(inti);
2292 return r;
2293 }
a91b8ebe
JF		 2294 r = __inject_vm(dev->kvm, inti);
2295 if (r) {
2296 kfree(inti);
2297 return r;
2298 }
c05c4186
JF		 2299 len -= sizeof(struct kvm_s390_irq);
2300 attr->addr += sizeof(struct kvm_s390_irq);
2301 }
2302
2303 return r;
2304}
2305
841b91c5
CH		 2306static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
2307{
2308 if (id >= MAX_S390_IO_ADAPTERS)
2309 return NULL;
2310 return kvm->arch.adapters[id];
2311}
2312
2313static int register_io_adapter(struct kvm_device *dev,
2314 struct kvm_device_attr *attr)
2315{
2316 struct s390_io_adapter *adapter;
2317 struct kvm_s390_io_adapter adapter_info;
2318
2319 if (copy_from_user(&adapter_info,
2320 (void __user *)attr->addr, sizeof(adapter_info)))
2321 return -EFAULT;
2322
2323 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
2324 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
2325 return -EINVAL;
2326
2327 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2328 if (!adapter)
2329 return -ENOMEM;
2330
2331 INIT_LIST_HEAD(&adapter->maps);
2332 init_rwsem(&adapter->maps_lock);
2333 atomic_set(&adapter->nr_maps, 0);
2334 adapter->id = adapter_info.id;
2335 adapter->isc = adapter_info.isc;
2336 adapter->maskable = adapter_info.maskable;
2337 adapter->masked = false;
2338 adapter->swap = adapter_info.swap;
08fab50d
FL		 2339 adapter->suppressible = (adapter_info.flags) &
2340 KVM_S390_ADAPTER_SUPPRESSIBLE;
841b91c5
CH		 2341 dev->kvm->arch.adapters[adapter->id] = adapter;
2342
2343 return 0;
2344}
2345
2346int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
2347{
2348 int ret;
2349 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2350
2351 if (!adapter || !adapter->maskable)
2352 return -EINVAL;
2353 ret = adapter->masked;
2354 adapter->masked = masked;
2355 return ret;
2356}
2357
2358static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
2359{
2360 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2361 struct s390_map_info *map;
2362 int ret;
2363
2364 if (!adapter || !addr)
2365 return -EINVAL;
2366
2367 map = kzalloc(sizeof(*map), GFP_KERNEL);
2368 if (!map) {
2369 ret = -ENOMEM;
2370 goto out;
2371 }
2372 INIT_LIST_HEAD(&map->list);
2373 map->guest_addr = addr;
6e0a0431 2374 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 2375 if (map->addr == -EFAULT) {
2376 ret = -EFAULT;
2377 goto out;
2378 }
2379 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
2380 if (ret < 0)
2381 goto out;
2382 BUG_ON(ret != 1);
2383 down_write(&adapter->maps_lock);
2384 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
2385 list_add_tail(&map->list, &adapter->maps);
2386 ret = 0;
2387 } else {
2388 put_page(map->page);
2389 ret = -EINVAL;
2390 }
2391 up_write(&adapter->maps_lock);
2392out:
2393 if (ret)
2394 kfree(map);
2395 return ret;
2396}
2397
2398static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
2399{
2400 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2401 struct s390_map_info *map, *tmp;
2402 int found = 0;
2403
2404 if (!adapter || !addr)
2405 return -EINVAL;
2406
2407 down_write(&adapter->maps_lock);
2408 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
2409 if (map->guest_addr == addr) {
2410 found = 1;
2411 atomic_dec(&adapter->nr_maps);
2412 list_del(&map->list);
2413 put_page(map->page);
2414 kfree(map);
2415 break;
2416 }
2417 }
2418 up_write(&adapter->maps_lock);
2419
2420 return found ? 0 : -EINVAL;
2421}
2422
2423void kvm_s390_destroy_adapters(struct kvm *kvm)
2424{
2425 int i;
2426 struct s390_map_info *map, *tmp;
2427
2428 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
2429 if (!kvm->arch.adapters[i])
2430 continue;
2431 list_for_each_entry_safe(map, tmp,
2432 &kvm->arch.adapters[i]->maps, list) {
2433 list_del(&map->list);
2434 put_page(map->page);
2435 kfree(map);
2436 }
2437 kfree(kvm->arch.adapters[i]);
2438 }
2439}
2440
2441static int modify_io_adapter(struct kvm_device *dev,
2442 struct kvm_device_attr *attr)
2443{
2444 struct kvm_s390_io_adapter_req req;
2445 struct s390_io_adapter *adapter;
2446 int ret;
2447
2448 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2449 return -EFAULT;
2450
2451 adapter = get_io_adapter(dev->kvm, req.id);
2452 if (!adapter)
2453 return -EINVAL;
2454 switch (req.type) {
2455 case KVM_S390_IO_ADAPTER_MASK:
2456 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
2457 if (ret > 0)
2458 ret = 0;
2459 break;
2460 case KVM_S390_IO_ADAPTER_MAP:
2461 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
2462 break;
2463 case KVM_S390_IO_ADAPTER_UNMAP:
2464 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
2465 break;
2466 default:
2467 ret = -EINVAL;
2468 }
2469
2470 return ret;
2471}
2472
6d28f789
HP		 2473static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
2474
2475{
2476 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
2477 u32 schid;
2478
2479 if (attr->flags)
2480 return -EINVAL;
2481 if (attr->attr != sizeof(schid))
2482 return -EINVAL;
2483 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
2484 return -EFAULT;
4dd6f17e
MM		 2485 if (!schid)
2486 return -EINVAL;
6d28f789
HP		 2487 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
2488 /*
2489 * If userspace is conforming to the architecture, we can have at most
2490 * one pending I/O interrupt per subchannel, so this is effectively a
2491 * clear all.
2492 */
2493 return 0;
2494}
2495
51978393
FL		 2496static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr)
2497{
2498 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2499 struct kvm_s390_ais_req req;
2500 int ret = 0;
2501
1ba15b24 2502 if (!test_kvm_facility(kvm, 72))
51978393
FL		 2503 return -ENOTSUPP;
2504
2505 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2506 return -EFAULT;
2507
2508 if (req.isc > MAX_ISC)
2509 return -EINVAL;
2510
2511 trace_kvm_s390_modify_ais_mode(req.isc,
2512 (fi->simm & AIS_MODE_MASK(req.isc)) ?
2513 (fi->nimm & AIS_MODE_MASK(req.isc)) ?
2514 2 : KVM_S390_AIS_MODE_SINGLE :
2515 KVM_S390_AIS_MODE_ALL, req.mode);
2516
2517 mutex_lock(&fi->ais_lock);
2518 switch (req.mode) {
2519 case KVM_S390_AIS_MODE_ALL:
2520 fi->simm &= ~AIS_MODE_MASK(req.isc);
2521 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2522 break;
2523 case KVM_S390_AIS_MODE_SINGLE:
2524 fi->simm |= AIS_MODE_MASK(req.isc);
2525 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2526 break;
2527 default:
2528 ret = -EINVAL;
2529 }
2530 mutex_unlock(&fi->ais_lock);
2531
2532 return ret;
2533}
2534
a8920950
YMZ		 2535static int kvm_s390_inject_airq(struct kvm *kvm,
2536 struct s390_io_adapter *adapter)
2537{
2538 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2539 struct kvm_s390_interrupt s390int = {
2540 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2541 .parm = 0,
2496c8e7 2542 .parm64 = isc_to_int_word(adapter->isc),
a8920950
YMZ		 2543 };
2544 int ret = 0;
2545
1ba15b24 2546 if (!test_kvm_facility(kvm, 72) || !adapter->suppressible)
a8920950
YMZ		 2547 return kvm_s390_inject_vm(kvm, &s390int);
2548
2549 mutex_lock(&fi->ais_lock);
2550 if (fi->nimm & AIS_MODE_MASK(adapter->isc)) {
2551 trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc);
2552 goto out;
2553 }
2554
2555 ret = kvm_s390_inject_vm(kvm, &s390int);
2556 if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) {
2557 fi->nimm |= AIS_MODE_MASK(adapter->isc);
2558 trace_kvm_s390_modify_ais_mode(adapter->isc,
2559 KVM_S390_AIS_MODE_SINGLE, 2);
2560 }
2561out:
2562 mutex_unlock(&fi->ais_lock);
2563 return ret;
2564}
2565
2566static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr)
2567{
2568 unsigned int id = attr->attr;
2569 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2570
2571 if (!adapter)
2572 return -EINVAL;
2573
2574 return kvm_s390_inject_airq(kvm, adapter);
2575}
2576
2c1a48f2
YMZ		 2577static int flic_ais_mode_set_all(struct kvm *kvm, struct kvm_device_attr *attr)
2578{
2579 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2580 struct kvm_s390_ais_all ais;
2581
2582 if (!test_kvm_facility(kvm, 72))
2583 return -ENOTSUPP;
2584
2585 if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais)))
2586 return -EFAULT;
2587
2588 mutex_lock(&fi->ais_lock);
2589 fi->simm = ais.simm;
2590 fi->nimm = ais.nimm;
2591 mutex_unlock(&fi->ais_lock);
2592
2593 return 0;
2594}
2595
c05c4186
JF		 2596static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2597{
2598 int r = 0;
3c038e6b
DD		 2599 unsigned int i;
2600 struct kvm_vcpu *vcpu;
c05c4186
JF		 2601
2602 switch (attr->group) {
2603 case KVM_DEV_FLIC_ENQUEUE:
2604 r = enqueue_floating_irq(dev, attr);
2605 break;
2606 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 2607 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 2608 break;
3c038e6b
DD		 2609 case KVM_DEV_FLIC_APF_ENABLE:
2610 dev->kvm->arch.gmap->pfault_enabled = 1;
2611 break;
2612 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2613 dev->kvm->arch.gmap->pfault_enabled = 0;
2614 /*
2615 * Make sure no async faults are in transition when
2616 * clearing the queues. So we don't need to worry
2617 * about late coming workers.
2618 */
2619 synchronize_srcu(&dev->kvm->srcu);
2620 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2621 kvm_clear_async_pf_completion_queue(vcpu);
2622 break;
841b91c5
CH		 2623 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2624 r = register_io_adapter(dev, attr);
2625 break;
2626 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2627 r = modify_io_adapter(dev, attr);
2628 break;
6d28f789
HP		 2629 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2630 r = clear_io_irq(dev->kvm, attr);
2631 break;
51978393
FL		 2632 case KVM_DEV_FLIC_AISM:
2633 r = modify_ais_mode(dev->kvm, attr);
2634 break;
a8920950
YMZ		 2635 case KVM_DEV_FLIC_AIRQ_INJECT:
2636 r = flic_inject_airq(dev->kvm, attr);
2637 break;
2c1a48f2
YMZ		 2638 case KVM_DEV_FLIC_AISM_ALL:
2639 r = flic_ais_mode_set_all(dev->kvm, attr);
2640 break;
c05c4186
JF		 2641 default:
2642 r = -EINVAL;
2643 }
2644
2645 return r;
2646}
2647
4f129858
HP		 2648static int flic_has_attr(struct kvm_device *dev,
2649 struct kvm_device_attr *attr)
2650{
2651 switch (attr->group) {
2652 case KVM_DEV_FLIC_GET_ALL_IRQS:
2653 case KVM_DEV_FLIC_ENQUEUE:
2654 case KVM_DEV_FLIC_CLEAR_IRQS:
2655 case KVM_DEV_FLIC_APF_ENABLE:
2656 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2657 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2658 case KVM_DEV_FLIC_ADAPTER_MODIFY:
6d28f789 2659 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
51978393 2660 case KVM_DEV_FLIC_AISM:
a8920950 2661 case KVM_DEV_FLIC_AIRQ_INJECT:
2c1a48f2 2662 case KVM_DEV_FLIC_AISM_ALL:
4f129858
HP		 2663 return 0;
2664 }
2665 return -ENXIO;
2666}
2667
c05c4186
JF		 2668static int flic_create(struct kvm_device *dev, u32 type)
2669{
2670 if (!dev)
2671 return -EINVAL;
2672 if (dev->kvm->arch.flic)
2673 return -EINVAL;
2674 dev->kvm->arch.flic = dev;
2675 return 0;
2676}
2677
2678static void flic_destroy(struct kvm_device *dev)
2679{
2680 dev->kvm->arch.flic = NULL;
2681 kfree(dev);
2682}
2683
2684/* s390 floating irq controller (flic) */
2685struct kvm_device_ops kvm_flic_ops = {
2686 .name = "kvm-flic",
2687 .get_attr = flic_get_attr,
2688 .set_attr = flic_set_attr,
4f129858 2689 .has_attr = flic_has_attr,
c05c4186
JF		 2690 .create = flic_create,
2691 .destroy = flic_destroy,
2692};
84223598
CH		 2693
2694static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2695{
2696 unsigned long bit;
2697
2698 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2699
2700 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2701}
2702
2703static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2704 u64 addr)
2705{
2706 struct s390_map_info *map;
2707
2708 if (!adapter)
2709 return NULL;
2710
2711 list_for_each_entry(map, &adapter->maps, list) {
2712 if (map->guest_addr == addr)
2713 return map;
2714 }
2715 return NULL;
2716}
2717
2718static int adapter_indicators_set(struct kvm *kvm,
2719 struct s390_io_adapter *adapter,
2720 struct kvm_s390_adapter_int *adapter_int)
2721{
2722 unsigned long bit;
2723 int summary_set, idx;
2724 struct s390_map_info *info;
2725 void *map;
2726
2727 info = get_map_info(adapter, adapter_int->ind_addr);
2728 if (!info)
2729 return -1;
2730 map = page_address(info->page);
2731 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2732 set_bit(bit, map);
2733 idx = srcu_read_lock(&kvm->srcu);
2734 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2735 set_page_dirty_lock(info->page);
2736 info = get_map_info(adapter, adapter_int->summary_addr);
2737 if (!info) {
2738 srcu_read_unlock(&kvm->srcu, idx);
2739 return -1;
2740 }
2741 map = page_address(info->page);
2742 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2743 adapter->swap);
2744 summary_set = test_and_set_bit(bit, map);
2745 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2746 set_page_dirty_lock(info->page);
2747 srcu_read_unlock(&kvm->srcu, idx);
2748 return summary_set ? 0 : 1;
2749}
2750
2751/*
2752 * < 0 - not injected due to error
2753 * = 0 - coalesced, summary indicator already active
2754 * > 0 - injected interrupt
2755 */
2756static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2757 struct kvm *kvm, int irq_source_id, int level,
2758 bool line_status)
2759{
2760 int ret;
2761 struct s390_io_adapter *adapter;
2762
2763 /* We're only interested in the 0->1 transition. */
2764 if (!level)
2765 return 0;
2766 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2767 if (!adapter)
2768 return -1;
2769 down_read(&adapter->maps_lock);
2770 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2771 up_read(&adapter->maps_lock);
2772 if ((ret > 0) && !adapter->masked) {
a8920950 2773 ret = kvm_s390_inject_airq(kvm, adapter);
84223598
CH		 2774 if (ret == 0)
2775 ret = 1;
2776 }
2777 return ret;
2778}
2779
4d62fcc0
QH		 2780/*
2781 * Inject the machine check to the guest.
2782 */
2783void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
2784 struct mcck_volatile_info *mcck_info)
2785{
2786 struct kvm_s390_interrupt_info inti;
2787 struct kvm_s390_irq irq;
2788 struct kvm_s390_mchk_info *mchk;
2789 union mci mci;
2790 __u64 cr14 = 0; /* upper bits are not used */
3dbf0205 2791 int rc;
4d62fcc0
QH		 2792
2793 mci.val = mcck_info->mcic;
2794 if (mci.sr)
cc65450c 2795 cr14 |= CR14_RECOVERY_SUBMASK;
4d62fcc0 2796 if (mci.dg)
cc65450c 2797 cr14 |= CR14_DEGRADATION_SUBMASK;
4d62fcc0 2798 if (mci.w)
cc65450c 2799 cr14 |= CR14_WARNING_SUBMASK;
4d62fcc0
QH		 2800
2801 mchk = mci.ck ? &inti.mchk : &irq.u.mchk;
2802 mchk->cr14 = cr14;
2803 mchk->mcic = mcck_info->mcic;
2804 mchk->ext_damage_code = mcck_info->ext_damage_code;
2805 mchk->failing_storage_address = mcck_info->failing_storage_address;
2806 if (mci.ck) {
2807 /* Inject the floating machine check */
2808 inti.type = KVM_S390_MCHK;
3dbf0205 2809 rc = __inject_vm(vcpu->kvm, &inti);
4d62fcc0
QH		 2810 } else {
2811 /* Inject the machine check to specified vcpu */
2812 irq.type = KVM_S390_MCHK;
3dbf0205 2813 rc = kvm_s390_inject_vcpu(vcpu, &irq);
4d62fcc0 2814 }
3dbf0205 2815 WARN_ON_ONCE(rc);
4d62fcc0
QH		 2816}
2817
c63cf538
RK		 2818int kvm_set_routing_entry(struct kvm *kvm,
2819 struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 2820 const struct kvm_irq_routing_entry *ue)
2821{
2822 int ret;
2823
2824 switch (ue->type) {
2825 case KVM_IRQ_ROUTING_S390_ADAPTER:
2826 e->set = set_adapter_int;
2827 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2828 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2829 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2830 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2831 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2832 ret = 0;
2833 break;
2834 default:
2835 ret = -EINVAL;
2836 }
2837
2838 return ret;
2839}
2840
2841int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2842 int irq_source_id, int level, bool line_status)
2843{
2844 return -EINVAL;
2845}
816c7667
JF		 2846
2847int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2848{
2849 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2850 struct kvm_s390_irq *buf;
2851 int r = 0;
2852 int n;
2853
2854 buf = vmalloc(len);
2855 if (!buf)
2856 return -ENOMEM;
2857
2858 if (copy_from_user((void *) buf, irqstate, len)) {
2859 r = -EFAULT;
2860 goto out_free;
2861 }
2862
2863 /*
2864 * Don't allow setting the interrupt state
2865 * when there are already interrupts pending
2866 */
2867 spin_lock(&li->lock);
2868 if (li->pending_irqs) {
2869 r = -EBUSY;
2870 goto out_unlock;
2871 }
2872
2873 for (n = 0; n < len / sizeof(*buf); n++) {
2874 r = do_inject_vcpu(vcpu, &buf[n]);
2875 if (r)
2876 break;
2877 }
2878
2879out_unlock:
2880 spin_unlock(&li->lock);
2881out_free:
2882 vfree(buf);
2883
2884 return r;
2885}
2886
2887static void store_local_irq(struct kvm_s390_local_interrupt *li,
2888 struct kvm_s390_irq *irq,
2889 unsigned long irq_type)
2890{
2891 switch (irq_type) {
2892 case IRQ_PEND_MCHK_EX:
2893 case IRQ_PEND_MCHK_REP:
2894 irq->type = KVM_S390_MCHK;
2895 irq->u.mchk = li->irq.mchk;
2896 break;
2897 case IRQ_PEND_PROG:
2898 irq->type = KVM_S390_PROGRAM_INT;
2899 irq->u.pgm = li->irq.pgm;
2900 break;
2901 case IRQ_PEND_PFAULT_INIT:
2902 irq->type = KVM_S390_INT_PFAULT_INIT;
2903 irq->u.ext = li->irq.ext;
2904 break;
2905 case IRQ_PEND_EXT_EXTERNAL:
2906 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2907 irq->u.extcall = li->irq.extcall;
2908 break;
2909 case IRQ_PEND_EXT_CLOCK_COMP:
2910 irq->type = KVM_S390_INT_CLOCK_COMP;
2911 break;
2912 case IRQ_PEND_EXT_CPU_TIMER:
2913 irq->type = KVM_S390_INT_CPU_TIMER;
2914 break;
2915 case IRQ_PEND_SIGP_STOP:
2916 irq->type = KVM_S390_SIGP_STOP;
2917 irq->u.stop = li->irq.stop;
2918 break;
2919 case IRQ_PEND_RESTART:
2920 irq->type = KVM_S390_RESTART;
2921 break;
2922 case IRQ_PEND_SET_PREFIX:
2923 irq->type = KVM_S390_SIGP_SET_PREFIX;
2924 irq->u.prefix = li->irq.prefix;
2925 break;
2926 }
2927}
2928
2929int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2930{
a5bd7647 2931 int scn;
689bdf9e 2932 DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
816c7667
JF		 2933 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2934 unsigned long pending_irqs;
2935 struct kvm_s390_irq irq;
2936 unsigned long irq_type;
2937 int cpuaddr;
2938 int n = 0;
2939
2940 spin_lock(&li->lock);
2941 pending_irqs = li->pending_irqs;
2942 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2943 sizeof(sigp_emerg_pending));
2944 spin_unlock(&li->lock);
2945
2946 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2947 memset(&irq, 0, sizeof(irq));
2948 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2949 continue;
2950 if (n + sizeof(irq) > len)
2951 return -ENOBUFS;
2952 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2953 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2954 return -EFAULT;
2955 n += sizeof(irq);
2956 }
2957
2958 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2959 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2960 memset(&irq, 0, sizeof(irq));
2961 if (n + sizeof(irq) > len)
2962 return -ENOBUFS;
2963 irq.type = KVM_S390_INT_EMERGENCY;
2964 irq.u.emerg.code = cpuaddr;
2965 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2966 return -EFAULT;
2967 n += sizeof(irq);
2968 }
2969 }
2970
a5bd7647 2971 if (sca_ext_call_pending(vcpu, &scn)) {
816c7667
JF		 2972 if (n + sizeof(irq) > len)
2973 return -ENOBUFS;
2974 memset(&irq, 0, sizeof(irq));
2975 irq.type = KVM_S390_INT_EXTERNAL_CALL;
a5bd7647 2976 irq.u.extcall.code = scn;
816c7667
JF		 2977 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2978 return -EFAULT;
2979 n += sizeof(irq);
2980 }
2981
2982 return n;
2983}
d7c5cb01 2984
9f30f621
MM		 2985static void __airqs_kick_single_vcpu(struct kvm *kvm, u8 deliverable_mask)
2986{
2987 int vcpu_id, online_vcpus = atomic_read(&kvm->online_vcpus);
2988 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
2989 struct kvm_vcpu *vcpu;
2990
2991 for_each_set_bit(vcpu_id, kvm->arch.idle_mask, online_vcpus) {
2992 vcpu = kvm_get_vcpu(kvm, vcpu_id);
2993 if (psw_ioint_disabled(vcpu))
2994 continue;
2995 deliverable_mask &= (u8)(vcpu->arch.sie_block->gcr[6] >> 24);
2996 if (deliverable_mask) {
2997 /* lately kicked but not yet running */
2998 if (test_and_set_bit(vcpu_id, gi->kicked_mask))
2999 return;
3000 kvm_s390_vcpu_wakeup(vcpu);
3001 return;
3002 }
3003 }
3004}
3005
3006static enum hrtimer_restart gisa_vcpu_kicker(struct hrtimer *timer)
3007{
3008 struct kvm_s390_gisa_interrupt *gi =
3009 container_of(timer, struct kvm_s390_gisa_interrupt, timer);
3010 struct kvm *kvm =
3011 container_of(gi->origin, struct sie_page2, gisa)->kvm;
3012 u8 pending_mask;
3013
3014 pending_mask = gisa_get_ipm_or_restore_iam(gi);
3015 if (pending_mask) {
3016 __airqs_kick_single_vcpu(kvm, pending_mask);
3017 hrtimer_forward_now(timer, ns_to_ktime(gi->expires));
3018 return HRTIMER_RESTART;
3019 };
3020
3021 return HRTIMER_NORESTART;
3022}
3023
3024#define NULL_GISA_ADDR 0x00000000UL
3025#define NONE_GISA_ADDR 0x00000001UL
3026#define GISA_ADDR_MASK 0xfffff000UL
3027
3028static void process_gib_alert_list(void)
3029{
3030 struct kvm_s390_gisa_interrupt *gi;
3031 struct kvm_s390_gisa *gisa;
3032 struct kvm *kvm;
3033 u32 final, origin = 0UL;
3034
3035 do {
3036 /*
3037 * If the NONE_GISA_ADDR is still stored in the alert list
3038 * origin, we will leave the outer loop. No further GISA has
3039 * been added to the alert list by millicode while processing
3040 * the current alert list.
3041 */
3042 final = (origin & NONE_GISA_ADDR);
3043 /*
3044 * Cut off the alert list and store the NONE_GISA_ADDR in the
3045 * alert list origin to avoid further GAL interruptions.
3046 * A new alert list can be build up by millicode in parallel
3047 * for guests not in the yet cut-off alert list. When in the
3048 * final loop, store the NULL_GISA_ADDR instead. This will re-
3049 * enable GAL interruptions on the host again.
3050 */
3051 origin = xchg(&gib->alert_list_origin,
3052 (!final) ? NONE_GISA_ADDR : NULL_GISA_ADDR);
3053 /*
3054 * Loop through the just cut-off alert list and start the
3055 * gisa timers to kick idle vcpus to consume the pending
3056 * interruptions asap.
3057 */
3058 while (origin & GISA_ADDR_MASK) {
3059 gisa = (struct kvm_s390_gisa *)(u64)origin;
3060 origin = gisa->next_alert;
3061 gisa->next_alert = (u32)(u64)gisa;
3062 kvm = container_of(gisa, struct sie_page2, gisa)->kvm;
3063 gi = &kvm->arch.gisa_int;
3064 if (hrtimer_active(&gi->timer))
3065 hrtimer_cancel(&gi->timer);
3066 hrtimer_start(&gi->timer, 0, HRTIMER_MODE_REL);
3067 }
3068 } while (!final);
3069
3070}
3071
d7c5cb01
MM		 3072void kvm_s390_gisa_clear(struct kvm *kvm)
3073{
982cff42
MM		 3074 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3075
3076 if (!gi->origin)
672128bf 3077 return;
174dd4f8 3078 gisa_clear_ipm(gi->origin);
982cff42 3079 VM_EVENT(kvm, 3, "gisa 0x%pK cleared", gi->origin);
d7c5cb01
MM		 3080}
3081
3082void kvm_s390_gisa_init(struct kvm *kvm)
3083{
982cff42
MM		 3084 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3085
672128bf
MM		 3086 if (!css_general_characteristics.aiv)
3087 return;
982cff42 3088 gi->origin = &kvm->arch.sie_page2->gisa;
6cff2e10
MM		 3089 gi->alert.mask = 0;
3090 spin_lock_init(&gi->alert.ref_lock);
9f30f621
MM		 3091 gi->expires = 50 * 1000; /* 50 usec */
3092 hrtimer_init(&gi->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
3093 gi->timer.function = gisa_vcpu_kicker;
174dd4f8
MM		 3094 memset(gi->origin, 0, sizeof(struct kvm_s390_gisa));
3095 gi->origin->next_alert = (u32)(u64)gi->origin;
982cff42 3096 VM_EVENT(kvm, 3, "gisa 0x%pK initialized", gi->origin);
d7c5cb01
MM		 3097}
3098
3099void kvm_s390_gisa_destroy(struct kvm *kvm)
3100{
9f30f621
MM		 3101 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3102
3103 if (!gi->origin)
3104 return;
3105 if (gi->alert.mask)
3106 KVM_EVENT(3, "vm 0x%pK has unexpected iam 0x%02x",
3107 kvm, gi->alert.mask);
3108 while (gisa_in_alert_list(gi->origin))
3109 cpu_relax();
3110 hrtimer_cancel(&gi->timer);
3111 gi->origin = NULL;
d7c5cb01 3112}
1282c21e 3113
6cff2e10
MM		 3114/**
3115 * kvm_s390_gisc_register - register a guest ISC
3116 *
3117 * @kvm: the kernel vm to work with
3118 * @gisc: the guest interruption sub class to register
3119 *
3120 * The function extends the vm specific alert mask to use.
3121 * The effective IAM mask in the GISA is updated as well
3122 * in case the GISA is not part of the GIB alert list.
3123 * It will be updated latest when the IAM gets restored
3124 * by gisa_get_ipm_or_restore_iam().
3125 *
3126 * Returns: the nonspecific ISC (NISC) the gib alert mechanism
3127 * has registered with the channel subsystem.
3128 * -ENODEV in case the vm uses no GISA
3129 * -ERANGE in case the guest ISC is invalid
3130 */
3131int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc)
3132{
3133 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3134
3135 if (!gi->origin)
3136 return -ENODEV;
3137 if (gisc > MAX_ISC)
3138 return -ERANGE;
3139
3140 spin_lock(&gi->alert.ref_lock);
3141 gi->alert.ref_count[gisc]++;
3142 if (gi->alert.ref_count[gisc] == 1) {
3143 gi->alert.mask |= 0x80 >> gisc;
3144 gisa_set_iam(gi->origin, gi->alert.mask);
3145 }
3146 spin_unlock(&gi->alert.ref_lock);
3147
3148 return gib->nisc;
3149}
3150EXPORT_SYMBOL_GPL(kvm_s390_gisc_register);
3151
3152/**
3153 * kvm_s390_gisc_unregister - unregister a guest ISC
3154 *
3155 * @kvm: the kernel vm to work with
3156 * @gisc: the guest interruption sub class to register
3157 *
3158 * The function reduces the vm specific alert mask to use.
3159 * The effective IAM mask in the GISA is updated as well
3160 * in case the GISA is not part of the GIB alert list.
3161 * It will be updated latest when the IAM gets restored
3162 * by gisa_get_ipm_or_restore_iam().
3163 *
3164 * Returns: the nonspecific ISC (NISC) the gib alert mechanism
3165 * has registered with the channel subsystem.
3166 * -ENODEV in case the vm uses no GISA
3167 * -ERANGE in case the guest ISC is invalid
3168 * -EINVAL in case the guest ISC is not registered
3169 */
3170int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc)
3171{
3172 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3173 int rc = 0;
3174
3175 if (!gi->origin)
3176 return -ENODEV;
3177 if (gisc > MAX_ISC)
3178 return -ERANGE;
3179
3180 spin_lock(&gi->alert.ref_lock);
3181 if (gi->alert.ref_count[gisc] == 0) {
3182 rc = -EINVAL;
3183 goto out;
3184 }
3185 gi->alert.ref_count[gisc]--;
3186 if (gi->alert.ref_count[gisc] == 0) {
3187 gi->alert.mask &= ~(0x80 >> gisc);
3188 gisa_set_iam(gi->origin, gi->alert.mask);
3189 }
3190out:
3191 spin_unlock(&gi->alert.ref_lock);
3192
3193 return rc;
3194}
3195EXPORT_SYMBOL_GPL(kvm_s390_gisc_unregister);
3196
9f30f621
MM		 3197static void gib_alert_irq_handler(struct airq_struct *airq)
3198{
3199 inc_irq_stat(IRQIO_GAL);
3200 process_gib_alert_list();
3201}
3202
3203static struct airq_struct gib_alert_irq = {
3204 .handler = gib_alert_irq_handler,
3205 .lsi_ptr = &gib_alert_irq.lsi_mask,
3206};
3207
1282c21e
MM		 3208void kvm_s390_gib_destroy(void)
3209{
3210 if (!gib)
3211 return;
3212 chsc_sgib(0);
9f30f621 3213 unregister_adapter_interrupt(&gib_alert_irq);
1282c21e
MM		 3214 free_page((unsigned long)gib);
3215 gib = NULL;
3216}
3217
3218int kvm_s390_gib_init(u8 nisc)
3219{
3220 int rc = 0;
3221
3222 if (!css_general_characteristics.aiv) {
3223 KVM_EVENT(3, "%s", "gib not initialized, no AIV facility");
3224 goto out;
3225 }
3226
3227 gib = (struct kvm_s390_gib *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
3228 if (!gib) {
3229 rc = -ENOMEM;
3230 goto out;
3231 }
3232
9f30f621
MM		 3233 gib_alert_irq.isc = nisc;
3234 if (register_adapter_interrupt(&gib_alert_irq)) {
3235 pr_err("Registering the GIB alert interruption handler failed\n");
3236 rc = -EIO;
3237 goto out_free_gib;
3238 }
3239
1282c21e
MM		 3240 gib->nisc = nisc;
3241 if (chsc_sgib((u32)(u64)gib)) {
3242 pr_err("Associating the GIB with the AIV facility failed\n");
3243 free_page((unsigned long)gib);
3244 gib = NULL;
3245 rc = -EIO;
9f30f621 3246 goto out_unreg_gal;
1282c21e
MM		 3247 }
3248
3249 KVM_EVENT(3, "gib 0x%pK (nisc=%d) initialized", gib, gib->nisc);
9f30f621
MM		 3250 goto out;
3251
3252out_unreg_gal:
3253 unregister_adapter_interrupt(&gib_alert_irq);
3254out_free_gib:
3255 free_page((unsigned long)gib);
3256 gib = NULL;
1282c21e
MM		 3257out:
3258 return rc;
3259}
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