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Merge tag 'kvm-x86-docs-6.7' of https://github.com/kvm-x86/linux into HEAD
[thirdparty/kernel/stable.git] / arch / s390 / kvm / interrupt.c
CommitLineData
d809aa23 1// SPDX-License-Identifier: GPL-2.0
ba5c1e9b 2/*
a53c8fab 3 * handling kvm guest interrupts
ba5c1e9b 4 *
f6547066 5 * Copyright IBM Corp. 2008, 2020
ba5c1e9b 6 *
ba5c1e9b
CO		 7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 */
9
1282c21e
MM		 10#define KMSG_COMPONENT "kvm-s390"
11#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
ca872302 13#include <linux/interrupt.h>
ba5c1e9b 14#include <linux/kvm_host.h>
cbb870c8 15#include <linux/hrtimer.h>
84223598 16#include <linux/mmu_context.h>
58616e6a 17#include <linux/nospec.h>
3cd61299 18#include <linux/signal.h>
5a0e3ad6 19#include <linux/slab.h>
383d0b05 20#include <linux/bitmap.h>
94aa033e 21#include <linux/vmalloc.h>
cbb870c8 22#include <asm/asm-offsets.h>
33b412ac 23#include <asm/dis.h>
7c0f6ba6 24#include <linux/uaccess.h>
ea5f4969 25#include <asm/sclp.h>
6d3da241 26#include <asm/isc.h>
1e133ab2 27#include <asm/gmap.h>
0319dae6 28#include <asm/switch_to.h>
ff5dc149 29#include <asm/nmi.h>
9f30f621 30#include <asm/airq.h>
d2197485 31#include <asm/tpi.h>
ba5c1e9b
CO		 32#include "kvm-s390.h"
33#include "gaccess.h"
ade38c31 34#include "trace-s390.h"
98b1d33d 35#include "pci.h"
ba5c1e9b 36
44c6ca3d 37#define PFAULT_INIT 0x0600
60f90a14
JF		 38#define PFAULT_DONE 0x0680
39#define VIRTIO_PARAM 0x0d00
d8346b7d 40
1282c21e
MM		 41static struct kvm_s390_gib *gib;
42
a5bd7647
ED		 43/* handle external calls via sigp interpretation facility */
44static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id)
45{
7d43bafc
ED		 46 int c, scn;
47
8d5fb0dc 48 if (!kvm_s390_test_cpuflags(vcpu, CPUSTAT_ECALL_PEND))
2c1bb2be
DH		 49 return 0;
50
a6940674 51 BUG_ON(!kvm_s390_use_sca_entries());
5e044315 52 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 53 if (vcpu->kvm->arch.use_esca) {
54 struct esca_block *sca = vcpu->kvm->arch.sca;
55 union esca_sigp_ctrl sigp_ctrl =
56 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
57
58 c = sigp_ctrl.c;
59 scn = sigp_ctrl.scn;
60 } else {
61 struct bsca_block *sca = vcpu->kvm->arch.sca;
62 union bsca_sigp_ctrl sigp_ctrl =
63 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
64
65 c = sigp_ctrl.c;
66 scn = sigp_ctrl.scn;
67 }
5e044315 68 read_unlock(&vcpu->kvm->arch.sca_lock);
a5bd7647
ED		 69
70 if (src_id)
7d43bafc 71 *src_id = scn;
a5bd7647 72
2c1bb2be 73 return c;
a5bd7647
ED		 74}
75
76static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id)
77{
bc784cce 78 int expect, rc;
a5bd7647 79
a6940674 80 BUG_ON(!kvm_s390_use_sca_entries());
5e044315 81 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 82 if (vcpu->kvm->arch.use_esca) {
83 struct esca_block *sca = vcpu->kvm->arch.sca;
84 union esca_sigp_ctrl *sigp_ctrl =
85 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
42400d99 86 union esca_sigp_ctrl new_val = {0}, old_val;
7d43bafc 87
42400d99 88 old_val = READ_ONCE(*sigp_ctrl);
7d43bafc
ED		 89 new_val.scn = src_id;
90 new_val.c = 1;
91 old_val.c = 0;
92
93 expect = old_val.value;
94 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
95 } else {
96 struct bsca_block *sca = vcpu->kvm->arch.sca;
97 union bsca_sigp_ctrl *sigp_ctrl =
98 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
42400d99 99 union bsca_sigp_ctrl new_val = {0}, old_val;
bc784cce 100
42400d99 101 old_val = READ_ONCE(*sigp_ctrl);
7d43bafc
ED		 102 new_val.scn = src_id;
103 new_val.c = 1;
104 old_val.c = 0;
105
106 expect = old_val.value;
107 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
108 }
5e044315 109 read_unlock(&vcpu->kvm->arch.sca_lock);
bc784cce
ED		 110
111 if (rc != expect) {
a5bd7647
ED		 112 /* another external call is pending */
113 return -EBUSY;
114 }
ef8f4f49 115 kvm_s390_set_cpuflags(vcpu, CPUSTAT_ECALL_PEND);
a5bd7647
ED		 116 return 0;
117}
118
119static void sca_clear_ext_call(struct kvm_vcpu *vcpu)
120{
7d43bafc 121 int rc, expect;
a5bd7647 122
a6940674
DH		 123 if (!kvm_s390_use_sca_entries())
124 return;
9daecfc6 125 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_ECALL_PEND);
5e044315 126 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 127 if (vcpu->kvm->arch.use_esca) {
128 struct esca_block *sca = vcpu->kvm->arch.sca;
129 union esca_sigp_ctrl *sigp_ctrl =
130 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
42400d99 131 union esca_sigp_ctrl old;
7d43bafc 132
42400d99 133 old = READ_ONCE(*sigp_ctrl);
7d43bafc
ED		 134 expect = old.value;
135 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
136 } else {
137 struct bsca_block *sca = vcpu->kvm->arch.sca;
138 union bsca_sigp_ctrl *sigp_ctrl =
139 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
42400d99 140 union bsca_sigp_ctrl old;
7d43bafc 141
42400d99 142 old = READ_ONCE(*sigp_ctrl);
7d43bafc
ED		 143 expect = old.value;
144 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
145 }
5e044315 146 read_unlock(&vcpu->kvm->arch.sca_lock);
7d43bafc 147 WARN_ON(rc != expect); /* cannot clear? */
a5bd7647
ED		 148}
149
3c038e6b 150int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 151{
152 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
153}
154
d8346b7d
CH		 155static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
156{
157 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
158}
159
48a3e950
CH		 160static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
161{
162 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
163}
164
ba5c1e9b
CO		 165static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
166{
fee0e0fd
DH		 167 return psw_extint_disabled(vcpu) &&
168 psw_ioint_disabled(vcpu) &&
169 psw_mchk_disabled(vcpu);
ba5c1e9b
CO		 170}
171
bb78c5ec
DH		 172static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
173{
174 if (psw_extint_disabled(vcpu) ||
b9224cd7 175 !(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK))
bb78c5ec 176 return 0;
f71d0dc5
DH		 177 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
178 /* No timer interrupts when single stepping */
179 return 0;
bb78c5ec
DH		 180 return 1;
181}
182
b4aec925
DH		 183static int ckc_irq_pending(struct kvm_vcpu *vcpu)
184{
5fe01793
DH		 185 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
186 const u64 ckc = vcpu->arch.sie_block->ckc;
187
b9224cd7 188 if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) {
5fe01793
DH		 189 if ((s64)ckc >= (s64)now)
190 return 0;
191 } else if (ckc >= now) {
b4aec925 192 return 0;
5fe01793 193 }
b4aec925
DH		 194 return ckc_interrupts_enabled(vcpu);
195}
196
197static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
198{
199 return !psw_extint_disabled(vcpu) &&
b9224cd7 200 (vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK);
b4aec925
DH		 201}
202
203static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
204{
4287f247
DH		 205 if (!cpu_timer_interrupts_enabled(vcpu))
206 return 0;
207 return kvm_s390_get_cpu_timer(vcpu) >> 63;
b4aec925
DH		 208}
209
6d3da241
JF		 210static uint64_t isc_to_isc_bits(int isc)
211{
79fd50c6
CH		 212 return (0x80 >> isc) << 24;
213}
214
2496c8e7
MM		 215static inline u32 isc_to_int_word(u8 isc)
216{
217 return ((u32)isc << 27) | 0x80000000;
218}
219
6d3da241 220static inline u8 int_word_to_isc(u32 int_word)
ba5c1e9b 221{
6d3da241
JF		 222 return (int_word & 0x38000000) >> 27;
223}
224
d77e6414
MM		 225/*
226 * To use atomic bitmap functions, we have to provide a bitmap address
227 * that is u64 aligned. However, the ipm might be u32 aligned.
228 * Therefore, we logically start the bitmap at the very beginning of the
229 * struct and fixup the bit number.
230 */
231#define IPM_BIT_OFFSET (offsetof(struct kvm_s390_gisa, ipm) * BITS_PER_BYTE)
232
6cff2e10
MM		 233/**
234 * gisa_set_iam - change the GISA interruption alert mask
235 *
236 * @gisa: gisa to operate on
237 * @iam: new IAM value to use
238 *
239 * Change the IAM atomically with the next alert address and the IPM
240 * of the GISA if the GISA is not part of the GIB alert list. All three
241 * fields are located in the first long word of the GISA.
242 *
243 * Returns: 0 on success
244 * -EBUSY in case the gisa is part of the alert list
245 */
246static inline int gisa_set_iam(struct kvm_s390_gisa *gisa, u8 iam)
247{
248 u64 word, _word;
249
250 do {
251 word = READ_ONCE(gisa->u64.word[0]);
252 if ((u64)gisa != word >> 32)
253 return -EBUSY;
254 _word = (word & ~0xffUL) | iam;
255 } while (cmpxchg(&gisa->u64.word[0], word, _word) != word);
256
257 return 0;
258}
259
174dd4f8
MM		 260/**
261 * gisa_clear_ipm - clear the GISA interruption pending mask
262 *
263 * @gisa: gisa to operate on
264 *
265 * Clear the IPM atomically with the next alert address and the IAM
266 * of the GISA unconditionally. All three fields are located in the
267 * first long word of the GISA.
268 */
269static inline void gisa_clear_ipm(struct kvm_s390_gisa *gisa)
270{
271 u64 word, _word;
272
273 do {
274 word = READ_ONCE(gisa->u64.word[0]);
275 _word = word & ~(0xffUL << 24);
276 } while (cmpxchg(&gisa->u64.word[0], word, _word) != word);
277}
278
9f30f621
MM		 279/**
280 * gisa_get_ipm_or_restore_iam - return IPM or restore GISA IAM
281 *
282 * @gi: gisa interrupt struct to work on
283 *
284 * Atomically restores the interruption alert mask if none of the
285 * relevant ISCs are pending and return the IPM.
286 *
287 * Returns: the relevant pending ISCs
288 */
289static inline u8 gisa_get_ipm_or_restore_iam(struct kvm_s390_gisa_interrupt *gi)
290{
291 u8 pending_mask, alert_mask;
292 u64 word, _word;
293
294 do {
295 word = READ_ONCE(gi->origin->u64.word[0]);
296 alert_mask = READ_ONCE(gi->alert.mask);
297 pending_mask = (u8)(word >> 24) & alert_mask;
298 if (pending_mask)
299 return pending_mask;
300 _word = (word & ~0xffUL) | alert_mask;
301 } while (cmpxchg(&gi->origin->u64.word[0], word, _word) != word);
302
303 return 0;
304}
305
bb2fb8cd 306static inline void gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
d77e6414
MM		 307{
308 set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
309}
310
bb2fb8cd 311static inline u8 gisa_get_ipm(struct kvm_s390_gisa *gisa)
d77e6414
MM		 312{
313 return READ_ONCE(gisa->ipm);
314}
315
bb2fb8cd 316static inline int gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
d77e6414
MM		 317{
318 return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
319}
320
8846f317 321static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu)
6d3da241 322{
0890ddea
CB		 323 unsigned long pending = vcpu->kvm->arch.float_int.pending_irqs |
324 vcpu->arch.local_int.pending_irqs;
325
326 pending &= ~vcpu->kvm->arch.float_int.masked_irqs;
327 return pending;
8846f317
CB		 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);
0890ddea 385 if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK)) {
6d3da241 386 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
0890ddea
CB		 387 __clear_bit(IRQ_PEND_EXT_SERVICE_EV, &active_mask);
388 }
383d0b05
JF		 389 if (psw_mchk_disabled(vcpu))
390 active_mask &= ~IRQ_PEND_MCHK_MASK;
201ae986 391 /* PV guest cpus can have a single interruption injected at a time. */
d47c4c45 392 if (kvm_s390_pv_cpu_get_handle(vcpu) &&
201ae986
MM		 393 vcpu->arch.sie_block->iictl != IICTL_CODE_NONE)
394 active_mask &= ~(IRQ_PEND_EXT_II_MASK |
395 IRQ_PEND_IO_MASK |
396 IRQ_PEND_MCHK_MASK);
4d62fcc0
QH		 397 /*
398 * Check both floating and local interrupt's cr14 because
399 * bit IRQ_PEND_MCHK_REP could be set in both cases.
400 */
6d3da241 401 if (!(vcpu->arch.sie_block->gcr[14] &
4d62fcc0
QH		 402 (vcpu->kvm->arch.float_int.mchk.cr14 |
403 vcpu->arch.local_int.irq.mchk.cr14)))
6d3da241 404 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
383d0b05 405
6cddd432
DH		 406 /*
407 * STOP irqs will never be actively delivered. They are triggered via
408 * intercept requests and cleared when the stop intercept is performed.
409 */
410 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
411
383d0b05
JF		 412 return active_mask;
413}
414
ba5c1e9b
CO		 415static void __set_cpu_idle(struct kvm_vcpu *vcpu)
416{
ef8f4f49 417 kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT);
4eeef242 418 set_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask);
ba5c1e9b
CO		 419}
420
421static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
422{
9daecfc6 423 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT);
4eeef242 424 clear_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask);
ba5c1e9b
CO		 425}
426
427static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
428{
9daecfc6
DH		 429 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IO_INT | CPUSTAT_EXT_INT |
430 CPUSTAT_STOP_INT);
ba5c1e9b 431 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 432 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
433
434 if (guestdbg_enabled(vcpu)) {
435 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
436 LCTL_CR10 | LCTL_CR11);
437 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
438 }
ba5c1e9b
CO		 439}
440
6d3da241
JF		 441static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
442{
8846f317 443 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK))
6d3da241 444 return;
b7d45571 445 if (psw_ioint_disabled(vcpu))
2018224d 446 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT);
6d3da241
JF		 447 else
448 vcpu->arch.sie_block->lctl |= LCTL_CR6;
449}
450
383d0b05
JF		 451static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
452{
96723d32 453 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK))
383d0b05
JF		 454 return;
455 if (psw_extint_disabled(vcpu))
2018224d 456 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
383d0b05
JF		 457 else
458 vcpu->arch.sie_block->lctl |= LCTL_CR0;
459}
460
461static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
462{
96723d32 463 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK))
383d0b05
JF		 464 return;
465 if (psw_mchk_disabled(vcpu))
466 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
467 else
468 vcpu->arch.sie_block->lctl |= LCTL_CR14;
469}
470
6cddd432
DH		 471static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
472{
473 if (kvm_s390_is_stop_irq_pending(vcpu))
2018224d 474 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
6cddd432
DH		 475}
476
6d3da241
JF		 477/* Set interception request for non-deliverable interrupts */
478static void set_intercept_indicators(struct kvm_vcpu *vcpu)
383d0b05 479{
6d3da241 480 set_intercept_indicators_io(vcpu);
383d0b05
JF		 481 set_intercept_indicators_ext(vcpu);
482 set_intercept_indicators_mchk(vcpu);
6cddd432 483 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 484}
485
0fb97abe
JF		 486static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
487{
383d0b05 488 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
201ae986 489 int rc = 0;
0fb97abe 490
ccc40c53 491 vcpu->stat.deliver_cputm++;
0fb97abe
JF		 492 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
493 0, 0);
201ae986
MM		 494 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
495 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
496 vcpu->arch.sie_block->eic = EXT_IRQ_CPU_TIMER;
497 } else {
498 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
499 (u16 *)__LC_EXT_INT_CODE);
500 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
501 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
502 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
503 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
504 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
505 }
383d0b05 506 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 507 return rc ? -EFAULT : 0;
0fb97abe
JF		 508}
509
510static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
511{
383d0b05 512 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
201ae986 513 int rc = 0;
0fb97abe 514
ccc40c53 515 vcpu->stat.deliver_ckc++;
0fb97abe
JF		 516 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
517 0, 0);
201ae986
MM		 518 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
519 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
520 vcpu->arch.sie_block->eic = EXT_IRQ_CLK_COMP;
521 } else {
522 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
523 (u16 __user *)__LC_EXT_INT_CODE);
524 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
525 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
526 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
527 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
528 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
529 }
383d0b05 530 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 531 return rc ? -EFAULT : 0;
0fb97abe
JF		 532}
533
383d0b05 534static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 535{
383d0b05
JF		 536 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
537 struct kvm_s390_ext_info ext;
0fb97abe
JF		 538 int rc;
539
383d0b05
JF		 540 spin_lock(&li->lock);
541 ext = li->irq.ext;
542 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
543 li->irq.ext.ext_params2 = 0;
544 spin_unlock(&li->lock);
545
3f24ba15
CB		 546 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
547 ext.ext_params2);
0fb97abe
JF		 548 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
549 KVM_S390_INT_PFAULT_INIT,
383d0b05 550 0, ext.ext_params2);
0fb97abe
JF		 551
552 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
553 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
554 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
555 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
556 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
557 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 558 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 559 return rc ? -EFAULT : 0;
0fb97abe
JF		 560}
561
d6404ded
DH		 562static int __write_machine_check(struct kvm_vcpu *vcpu,
563 struct kvm_s390_mchk_info *mchk)
564{
565 unsigned long ext_sa_addr;
4e0b1ab7 566 unsigned long lc;
0319dae6 567 freg_t fprs[NUM_FPRS];
ff5dc149 568 union mci mci;
d6404ded
DH		 569 int rc;
570
201ae986
MM		 571 /*
572 * All other possible payload for a machine check (e.g. the register
573 * contents in the save area) will be handled by the ultravisor, as
574 * the hypervisor does not not have the needed information for
575 * protected guests.
576 */
577 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
578 vcpu->arch.sie_block->iictl = IICTL_CODE_MCHK;
579 vcpu->arch.sie_block->mcic = mchk->mcic;
580 vcpu->arch.sie_block->faddr = mchk->failing_storage_address;
581 vcpu->arch.sie_block->edc = mchk->ext_damage_code;
582 return 0;
583 }
584
ff5dc149 585 mci.val = mchk->mcic;
31d8b8d4 586 /* take care of lazy register loading */
0319dae6
DH		 587 save_fpu_regs();
588 save_access_regs(vcpu->run->s.regs.acrs);
80248559
CB		 589 if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
590 save_gs_cb(current->thread.gs_cb);
0319dae6 591
d6404ded 592 /* Extended save area */
916cda1a
MS		 593 rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,
594 sizeof(unsigned long));
4e0b1ab7
FZ		 595 /* Only bits 0 through 63-LC are used for address formation */
596 lc = ext_sa_addr & MCESA_LC_MASK;
597 if (test_kvm_facility(vcpu->kvm, 133)) {
598 switch (lc) {
599 case 0:
600 case 10:
601 ext_sa_addr &= ~0x3ffUL;
602 break;
603 case 11:
604 ext_sa_addr &= ~0x7ffUL;
605 break;
606 case 12:
607 ext_sa_addr &= ~0xfffUL;
608 break;
609 default:
610 ext_sa_addr = 0;
611 break;
612 }
613 } else {
614 ext_sa_addr &= ~0x3ffUL;
615 }
616
ff5dc149
DH		 617 if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
618 if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
619 512))
620 mci.vr = 0;
621 } else {
622 mci.vr = 0;
623 }
4e0b1ab7
FZ		 624 if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133)
625 && (lc == 11 || lc == 12)) {
626 if (write_guest_abs(vcpu, ext_sa_addr + 1024,
627 &vcpu->run->s.regs.gscb, 32))
628 mci.gs = 0;
629 } else {
630 mci.gs = 0;
631 }
d6404ded
DH		 632
633 /* General interruption information */
0319dae6 634 rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
d6404ded
DH		 635 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
636 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
637 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
638 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ff5dc149 639 rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);
d6404ded
DH		 640
641 /* Register-save areas */
0319dae6
DH		 642 if (MACHINE_HAS_VX) {
643 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
644 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
645 } else {
646 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA,
647 vcpu->run->s.regs.fprs, 128);
648 }
649 rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA,
650 vcpu->run->s.regs.gprs, 128);
651 rc |= put_guest_lc(vcpu, current->thread.fpu.fpc,
652 (u32 __user *) __LC_FP_CREG_SAVE_AREA);
653 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr,
654 (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA);
655 rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu),
656 (u64 __user *) __LC_CPU_TIMER_SAVE_AREA);
657 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8,
658 (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA);
659 rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA,
660 &vcpu->run->s.regs.acrs, 64);
661 rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA,
662 &vcpu->arch.sie_block->gcr, 128);
d6404ded
DH		 663
664 /* Extended interruption information */
8953fb08
DH		 665 rc |= put_guest_lc(vcpu, mchk->ext_damage_code,
666 (u32 __user *) __LC_EXT_DAMAGE_CODE);
d6404ded
DH		 667 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
668 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
669 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout,
670 sizeof(mchk->fixed_logout));
671 return rc ? -EFAULT : 0;
672}
673
383d0b05 674static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 675{
6d3da241 676 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
383d0b05 677 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
6d3da241 678 struct kvm_s390_mchk_info mchk = {};
6d3da241
JF		 679 int deliver = 0;
680 int rc = 0;
0fb97abe 681
6d3da241 682 spin_lock(&fi->lock);
383d0b05 683 spin_lock(&li->lock);
6d3da241
JF		 684 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
685 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
686 /*
687 * If there was an exigent machine check pending, then any
688 * repressible machine checks that might have been pending
689 * are indicated along with it, so always clear bits for
690 * repressible and exigent interrupts
691 */
692 mchk = li->irq.mchk;
693 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
694 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
695 memset(&li->irq.mchk, 0, sizeof(mchk));
696 deliver = 1;
697 }
383d0b05 698 /*
6d3da241
JF		 699 * We indicate floating repressible conditions along with
700 * other pending conditions. Channel Report Pending and Channel
b9df116c 701 * Subsystem damage are the only two and are indicated by
6d3da241 702 * bits in mcic and masked in cr14.
383d0b05 703 */
6d3da241
JF		 704 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
705 mchk.mcic |= fi->mchk.mcic;
706 mchk.cr14 |= fi->mchk.cr14;
707 memset(&fi->mchk, 0, sizeof(mchk));
708 deliver = 1;
709 }
383d0b05 710 spin_unlock(&li->lock);
6d3da241 711 spin_unlock(&fi->lock);
383d0b05 712
6d3da241 713 if (deliver) {
3f24ba15 714 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
6d3da241
JF		 715 mchk.mcic);
716 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
717 KVM_S390_MCHK,
718 mchk.cr14, mchk.mcic);
32de0749 719 vcpu->stat.deliver_machine_check++;
d6404ded 720 rc = __write_machine_check(vcpu, &mchk);
6d3da241 721 }
d6404ded 722 return rc;
0fb97abe
JF		 723}
724
725static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
726{
383d0b05 727 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
201ae986 728 int rc = 0;
0fb97abe 729
3f24ba15 730 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
0fb97abe
JF		 731 vcpu->stat.deliver_restart_signal++;
732 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
733
201ae986
MM		 734 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
735 vcpu->arch.sie_block->iictl = IICTL_CODE_RESTART;
736 } else {
737 rc = write_guest_lc(vcpu,
738 offsetof(struct lowcore, restart_old_psw),
739 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
740 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw),
741 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
742 }
383d0b05 743 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 744 return rc ? -EFAULT : 0;
0fb97abe
JF		 745}
746
383d0b05 747static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 748{
383d0b05
JF		 749 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
750 struct kvm_s390_prefix_info prefix;
751
752 spin_lock(&li->lock);
753 prefix = li->irq.prefix;
754 li->irq.prefix.address = 0;
755 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
756 spin_unlock(&li->lock);
0fb97abe 757
0fb97abe
JF		 758 vcpu->stat.deliver_prefix_signal++;
759 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
760 KVM_S390_SIGP_SET_PREFIX,
383d0b05 761 prefix.address, 0);
0fb97abe 762
383d0b05 763 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 764 return 0;
765}
766
383d0b05 767static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 768{
383d0b05 769 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 770 int rc;
383d0b05
JF		 771 int cpu_addr;
772
773 spin_lock(&li->lock);
774 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
775 clear_bit(cpu_addr, li->sigp_emerg_pending);
776 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
777 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
778 spin_unlock(&li->lock);
0fb97abe 779
3f24ba15 780 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
0fb97abe 781 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 782 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
783 cpu_addr, 0);
201ae986
MM		 784 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
785 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
786 vcpu->arch.sie_block->eic = EXT_IRQ_EMERGENCY_SIG;
787 vcpu->arch.sie_block->extcpuaddr = cpu_addr;
788 return 0;
789 }
0fb97abe
JF		 790
791 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
792 (u16 *)__LC_EXT_INT_CODE);
383d0b05 793 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 794 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
795 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
796 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
797 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 798 return rc ? -EFAULT : 0;
0fb97abe
JF		 799}
800
383d0b05 801static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 802{
383d0b05
JF		 803 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
804 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 805 int rc;
806
383d0b05
JF		 807 spin_lock(&li->lock);
808 extcall = li->irq.extcall;
809 li->irq.extcall.code = 0;
810 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
811 spin_unlock(&li->lock);
812
3f24ba15 813 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
0fb97abe
JF		 814 vcpu->stat.deliver_external_call++;
815 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
816 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 817 extcall.code, 0);
201ae986
MM		 818 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
819 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
820 vcpu->arch.sie_block->eic = EXT_IRQ_EXTERNAL_CALL;
821 vcpu->arch.sie_block->extcpuaddr = extcall.code;
822 return 0;
823 }
0fb97abe
JF		 824
825 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
826 (u16 *)__LC_EXT_INT_CODE);
383d0b05 827 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 828 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
829 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
830 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
831 sizeof(psw_t));
99e20009 832 return rc ? -EFAULT : 0;
0fb97abe
JF		 833}
834
ea5c68c3
JF		 835static int __deliver_prog_pv(struct kvm_vcpu *vcpu, u16 code)
836{
837 switch (code) {
838 case PGM_SPECIFICATION:
839 vcpu->arch.sie_block->iictl = IICTL_CODE_SPECIFICATION;
840 break;
841 case PGM_OPERAND:
842 vcpu->arch.sie_block->iictl = IICTL_CODE_OPERAND;
843 break;
844 default:
845 return -EINVAL;
846 }
847 return 0;
848}
849
383d0b05 850static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 851{
383d0b05
JF		 852 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
853 struct kvm_s390_pgm_info pgm_info;
a9a846fd 854 int rc = 0, nullifying = false;
634790b8 855 u16 ilen;
8712836b 856
383d0b05
JF		 857 spin_lock(&li->lock);
858 pgm_info = li->irq.pgm;
859 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
860 memset(&li->irq.pgm, 0, sizeof(pgm_info));
861 spin_unlock(&li->lock);
862
634790b8 863 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
0e8bc06a
DH		 864 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
865 pgm_info.code, ilen);
ccc40c53 866 vcpu->stat.deliver_program++;
0fb97abe 867 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 868 pgm_info.code, 0);
0fb97abe 869
ea5c68c3
JF		 870 /* PER is handled by the ultravisor */
871 if (kvm_s390_pv_cpu_is_protected(vcpu))
872 return __deliver_prog_pv(vcpu, pgm_info.code & ~PGM_PER);
873
383d0b05 874 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 875 case PGM_AFX_TRANSLATION:
876 case PGM_ASX_TRANSLATION:
877 case PGM_EX_TRANSLATION:
878 case PGM_LFX_TRANSLATION:
879 case PGM_LSTE_SEQUENCE:
880 case PGM_LSX_TRANSLATION:
881 case PGM_LX_TRANSLATION:
882 case PGM_PRIMARY_AUTHORITY:
883 case PGM_SECONDARY_AUTHORITY:
a9a846fd 884 nullifying = true;
3b684a42 885 fallthrough;
8712836b 886 case PGM_SPACE_SWITCH:
383d0b05 887 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 888 (u64 *)__LC_TRANS_EXC_CODE);
889 break;
890 case PGM_ALEN_TRANSLATION:
891 case PGM_ALE_SEQUENCE:
892 case PGM_ASTE_INSTANCE:
893 case PGM_ASTE_SEQUENCE:
894 case PGM_ASTE_VALIDITY:
895 case PGM_EXTENDED_AUTHORITY:
383d0b05 896 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 897 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 898 nullifying = true;
8712836b
DH		 899 break;
900 case PGM_ASCE_TYPE:
901 case PGM_PAGE_TRANSLATION:
902 case PGM_REGION_FIRST_TRANS:
903 case PGM_REGION_SECOND_TRANS:
904 case PGM_REGION_THIRD_TRANS:
905 case PGM_SEGMENT_TRANSLATION:
383d0b05 906 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 907 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 908 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 909 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 910 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 911 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 912 nullifying = true;
8712836b
DH		 913 break;
914 case PGM_MONITOR:
383d0b05 915 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 916 (u16 *)__LC_MON_CLASS_NR);
383d0b05 917 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 918 (u64 *)__LC_MON_CODE);
919 break;
403c8648 920 case PGM_VECTOR_PROCESSING:
8712836b 921 case PGM_DATA:
383d0b05 922 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 923 (u32 *)__LC_DATA_EXC_CODE);
924 break;
925 case PGM_PROTECTION:
383d0b05 926 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 927 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 928 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 929 (u8 *)__LC_EXC_ACCESS_ID);
930 break;
a9a846fd
TH		 931 case PGM_STACK_FULL:
932 case PGM_STACK_EMPTY:
933 case PGM_STACK_SPECIFICATION:
934 case PGM_STACK_TYPE:
935 case PGM_STACK_OPERATION:
936 case PGM_TRACE_TABEL:
937 case PGM_CRYPTO_OPERATION:
938 nullifying = true;
939 break;
8712836b
DH		 940 }
941
383d0b05
JF		 942 if (pgm_info.code & PGM_PER) {
943 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 944 (u8 *) __LC_PER_CODE);
383d0b05 945 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 946 (u8 *)__LC_PER_ATMID);
383d0b05 947 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 948 (u64 *) __LC_PER_ADDRESS);
383d0b05 949 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 950 (u8 *) __LC_PER_ACCESS_ID);
951 }
952
eaa4f416 953 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND))
0e8bc06a 954 kvm_s390_rewind_psw(vcpu, ilen);
a9a846fd 955
0e8bc06a
DH		 956 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
957 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
2ba45968 958 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
26c21aa4 959 (u64 *) __LC_PGM_LAST_BREAK);
383d0b05 960 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 961 (u16 *)__LC_PGM_INT_CODE);
962 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
963 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
964 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
965 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 966 return rc ? -EFAULT : 0;
0fb97abe
JF		 967}
968
0890ddea
CB		 969#define SCCB_MASK 0xFFFFFFF8
970#define SCCB_EVENT_PENDING 0x3
971
972static int write_sclp(struct kvm_vcpu *vcpu, u32 parm)
973{
974 int rc;
975
976 if (kvm_s390_pv_cpu_get_handle(vcpu)) {
977 vcpu->arch.sie_block->iictl = IICTL_CODE_EXT;
978 vcpu->arch.sie_block->eic = EXT_IRQ_SERVICE_SIG;
979 vcpu->arch.sie_block->eiparams = parm;
980 return 0;
981 }
982
983 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
984 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
985 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
986 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
987 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
988 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
989 rc |= put_guest_lc(vcpu, parm,
990 (u32 *)__LC_EXT_PARAMS);
991
992 return rc ? -EFAULT : 0;
993}
994
6d3da241 995static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
0fb97abe 996{
6d3da241
JF		 997 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
998 struct kvm_s390_ext_info ext;
6d3da241
JF		 999
1000 spin_lock(&fi->lock);
0890ddea
CB		 1001 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs) ||
1002 !(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
6d3da241
JF		 1003 spin_unlock(&fi->lock);
1004 return 0;
1005 }
1006 ext = fi->srv_signal;
1007 memset(&fi->srv_signal, 0, sizeof(ext));
1008 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
0890ddea
CB		 1009 clear_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs);
1010 if (kvm_s390_pv_cpu_is_protected(vcpu))
1011 set_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs);
6d3da241 1012 spin_unlock(&fi->lock);
0fb97abe 1013
3f24ba15 1014 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
6d3da241 1015 ext.ext_params);
0fb97abe 1016 vcpu->stat.deliver_service_signal++;
6d3da241
JF		 1017 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
1018 ext.ext_params, 0);
0fb97abe 1019
0890ddea
CB		 1020 return write_sclp(vcpu, ext.ext_params);
1021}
6d3da241 1022
0890ddea
CB		 1023static int __must_check __deliver_service_ev(struct kvm_vcpu *vcpu)
1024{
1025 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
1026 struct kvm_s390_ext_info ext;
1027
1028 spin_lock(&fi->lock);
1029 if (!(test_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs))) {
1030 spin_unlock(&fi->lock);
1031 return 0;
1032 }
1033 ext = fi->srv_signal;
1034 /* only clear the event bit */
1035 fi->srv_signal.ext_params &= ~SCCB_EVENT_PENDING;
1036 clear_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs);
1037 spin_unlock(&fi->lock);
1038
1039 VCPU_EVENT(vcpu, 4, "%s", "deliver: sclp parameter event");
1040 vcpu->stat.deliver_service_signal++;
1041 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
1042 ext.ext_params, 0);
1043
1044 return write_sclp(vcpu, SCCB_EVENT_PENDING);
0fb97abe
JF		 1045}
1046
6d3da241 1047static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
0fb97abe 1048{
6d3da241
JF		 1049 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
1050 struct kvm_s390_interrupt_info *inti;
1051 int rc = 0;
0fb97abe 1052
6d3da241
JF		 1053 spin_lock(&fi->lock);
1054 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
1055 struct kvm_s390_interrupt_info,
1056 list);
1057 if (inti) {
6d3da241
JF		 1058 list_del(&inti->list);
1059 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
1060 }
1061 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
1062 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1063 spin_unlock(&fi->lock);
8712836b 1064
6d3da241 1065 if (inti) {
3f24ba15
CB		 1066 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1067 KVM_S390_INT_PFAULT_DONE, 0,
1068 inti->ext.ext_params2);
1069 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
1070 inti->ext.ext_params2);
1071
6d3da241
JF		 1072 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
1073 (u16 *)__LC_EXT_INT_CODE);
1074 rc |= put_guest_lc(vcpu, PFAULT_DONE,
1075 (u16 *)__LC_EXT_CPU_ADDR);
1076 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
1077 &vcpu->arch.sie_block->gpsw,
1078 sizeof(psw_t));
1079 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
1080 &vcpu->arch.sie_block->gpsw,
1081 sizeof(psw_t));
1082 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
1083 (u64 *)__LC_EXT_PARAMS2);
1084 kfree(inti);
1085 }
99e20009 1086 return rc ? -EFAULT : 0;
0fb97abe
JF		 1087}
1088
6d3da241 1089static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
0fb97abe 1090{
6d3da241
JF		 1091 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
1092 struct kvm_s390_interrupt_info *inti;
1093 int rc = 0;
0fb97abe 1094
6d3da241
JF		 1095 spin_lock(&fi->lock);
1096 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
1097 struct kvm_s390_interrupt_info,
1098 list);
1099 if (inti) {
1100 VCPU_EVENT(vcpu, 4,
3f24ba15 1101 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
6d3da241 1102 inti->ext.ext_params, inti->ext.ext_params2);
ccc40c53 1103 vcpu->stat.deliver_virtio++;
6d3da241
JF		 1104 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1105 inti->type,
1106 inti->ext.ext_params,
1107 inti->ext.ext_params2);
1108 list_del(&inti->list);
1109 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
1110 }
1111 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
1112 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1113 spin_unlock(&fi->lock);
0fb97abe 1114
6d3da241
JF		 1115 if (inti) {
1116 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
1117 (u16 *)__LC_EXT_INT_CODE);
1118 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
1119 (u16 *)__LC_EXT_CPU_ADDR);
1120 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
1121 &vcpu->arch.sie_block->gpsw,
1122 sizeof(psw_t));
1123 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
1124 &vcpu->arch.sie_block->gpsw,
1125 sizeof(psw_t));
1126 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
1127 (u32 *)__LC_EXT_PARAMS);
1128 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
1129 (u64 *)__LC_EXT_PARAMS2);
1130 kfree(inti);
1131 }
99e20009 1132 return rc ? -EFAULT : 0;
0fb97abe
JF		 1133}
1134
d7c5cb01
MM		 1135static int __do_deliver_io(struct kvm_vcpu *vcpu, struct kvm_s390_io_info *io)
1136{
1137 int rc;
1138
201ae986
MM		 1139 if (kvm_s390_pv_cpu_is_protected(vcpu)) {
1140 vcpu->arch.sie_block->iictl = IICTL_CODE_IO;
1141 vcpu->arch.sie_block->subchannel_id = io->subchannel_id;
1142 vcpu->arch.sie_block->subchannel_nr = io->subchannel_nr;
1143 vcpu->arch.sie_block->io_int_parm = io->io_int_parm;
1144 vcpu->arch.sie_block->io_int_word = io->io_int_word;
1145 return 0;
1146 }
1147
d7c5cb01
MM		 1148 rc = put_guest_lc(vcpu, io->subchannel_id, (u16 *)__LC_SUBCHANNEL_ID);
1149 rc |= put_guest_lc(vcpu, io->subchannel_nr, (u16 *)__LC_SUBCHANNEL_NR);
1150 rc |= put_guest_lc(vcpu, io->io_int_parm, (u32 *)__LC_IO_INT_PARM);
1151 rc |= put_guest_lc(vcpu, io->io_int_word, (u32 *)__LC_IO_INT_WORD);
1152 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
1153 &vcpu->arch.sie_block->gpsw,
1154 sizeof(psw_t));
1155 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
1156 &vcpu->arch.sie_block->gpsw,
1157 sizeof(psw_t));
1158 return rc ? -EFAULT : 0;
1159}
1160
0fb97abe 1161static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
6d3da241 1162 unsigned long irq_type)
0fb97abe 1163{
6d3da241
JF		 1164 struct list_head *isc_list;
1165 struct kvm_s390_float_interrupt *fi;
982cff42 1166 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
6d3da241 1167 struct kvm_s390_interrupt_info *inti = NULL;
d7c5cb01
MM		 1168 struct kvm_s390_io_info io;
1169 u32 isc;
6d3da241 1170 int rc = 0;
0fb97abe 1171
6d3da241 1172 fi = &vcpu->kvm->arch.float_int;
8712836b 1173
6d3da241 1174 spin_lock(&fi->lock);
d7c5cb01
MM		 1175 isc = irq_type_to_isc(irq_type);
1176 isc_list = &fi->lists[isc];
6d3da241
JF		 1177 inti = list_first_entry_or_null(isc_list,
1178 struct kvm_s390_interrupt_info,
1179 list);
1180 if (inti) {
dcc98ea6
CB		 1181 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1182 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)");
1183 else
1184 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x",
1185 inti->io.subchannel_id >> 8,
1186 inti->io.subchannel_id >> 1 & 0x3,
1187 inti->io.subchannel_nr);
1188
ccc40c53 1189 vcpu->stat.deliver_io++;
6d3da241
JF		 1190 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1191 inti->type,
1192 ((__u32)inti->io.subchannel_id << 16) |
1193 inti->io.subchannel_nr,
1194 ((__u64)inti->io.io_int_parm << 32) |
1195 inti->io.io_int_word);
1196 list_del(&inti->list);
1197 fi->counters[FIRQ_CNTR_IO] -= 1;
1198 }
1199 if (list_empty(isc_list))
1200 clear_bit(irq_type, &fi->pending_irqs);
1201 spin_unlock(&fi->lock);
1202
1203 if (inti) {
d7c5cb01 1204 rc = __do_deliver_io(vcpu, &(inti->io));
6d3da241 1205 kfree(inti);
d7c5cb01 1206 goto out;
6d3da241 1207 }
383d0b05 1208
982cff42 1209 if (gi->origin && gisa_tac_ipm_gisc(gi->origin, isc)) {
d7c5cb01
MM		 1210 /*
1211 * in case an adapter interrupt was not delivered
1212 * in SIE context KVM will handle the delivery
1213 */
1214 VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc);
1215 memset(&io, 0, sizeof(io));
2496c8e7 1216 io.io_int_word = isc_to_int_word(isc);
ccc40c53 1217 vcpu->stat.deliver_io++;
d7c5cb01
MM		 1218 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1219 KVM_S390_INT_IO(1, 0, 0, 0),
1220 ((__u32)io.subchannel_id << 16) |
1221 io.subchannel_nr,
1222 ((__u64)io.io_int_parm << 32) |
1223 io.io_int_word);
1224 rc = __do_deliver_io(vcpu, &io);
1225 }
1226out:
1227 return rc;
383d0b05
JF		 1228}
1229
ea5f4969
DH		 1230/* Check whether an external call is pending (deliverable or not) */
1231int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 1232{
ea5f4969 1233 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
4953919f 1234
37c5f6c8 1235 if (!sclp.has_sigpif)
ea5f4969 1236 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 1237
a5bd7647 1238 return sca_ext_call_pending(vcpu, NULL);
4953919f
DH		 1239}
1240
9a022067 1241int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 1242{
4d32ad6b
DH		 1243 if (deliverable_irqs(vcpu))
1244 return 1;
ba5c1e9b 1245
4d32ad6b
DH		 1246 if (kvm_cpu_has_pending_timer(vcpu))
1247 return 1;
ba5c1e9b 1248
ea5f4969 1249 /* external call pending and deliverable */
4d32ad6b 1250 if (kvm_s390_ext_call_pending(vcpu) &&
ea5f4969 1251 !psw_extint_disabled(vcpu) &&
b9224cd7 1252 (vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK))
4d32ad6b 1253 return 1;
4953919f 1254
4d32ad6b
DH		 1255 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
1256 return 1;
1257 return 0;
ba5c1e9b
CO		 1258}
1259
3d80840d
MT		 1260int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1261{
b4aec925 1262 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
3d80840d
MT		 1263}
1264
b3c17f10
DH		 1265static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
1266{
5fe01793
DH		 1267 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
1268 const u64 ckc = vcpu->arch.sie_block->ckc;
1269 u64 cputm, sltime = 0;
b3c17f10
DH		 1270
1271 if (ckc_interrupts_enabled(vcpu)) {
b9224cd7 1272 if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) {
5fe01793
DH		 1273 if ((s64)now < (s64)ckc)
1274 sltime = tod_to_ns((s64)ckc - (s64)now);
1275 } else if (now < ckc) {
1276 sltime = tod_to_ns(ckc - now);
1277 }
1278 /* already expired */
1279 if (!sltime)
b3c17f10
DH		 1280 return 0;
1281 if (cpu_timer_interrupts_enabled(vcpu)) {
1282 cputm = kvm_s390_get_cpu_timer(vcpu);
1283 /* already expired? */
1284 if (cputm >> 63)
1285 return 0;
eba8e1af 1286 return min_t(u64, sltime, tod_to_ns(cputm));
b3c17f10
DH		 1287 }
1288 } else if (cpu_timer_interrupts_enabled(vcpu)) {
1289 sltime = kvm_s390_get_cpu_timer(vcpu);
1290 /* already expired? */
1291 if (sltime >> 63)
1292 return 0;
1293 }
1294 return sltime;
1295}
1296
ba5c1e9b
CO		 1297int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
1298{
9f30f621 1299 struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int;
b3c17f10 1300 u64 sltime;
ba5c1e9b
CO		 1301
1302 vcpu->stat.exit_wait_state++;
ba5c1e9b 1303
0759d068 1304 /* fast path */
118b862b 1305 if (kvm_arch_vcpu_runnable(vcpu))
0759d068 1306 return 0;
e52b2af5 1307
ba5c1e9b
CO		 1308 if (psw_interrupts_disabled(vcpu)) {
1309 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 1310 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 1311 }
1312
9f30f621
MM		 1313 if (gi->origin &&
1314 (gisa_get_ipm_or_restore_iam(gi) &
1315 vcpu->arch.sie_block->gcr[6] >> 24))
1316 return 0;
1317
b3c17f10
DH		 1318 if (!ckc_interrupts_enabled(vcpu) &&
1319 !cpu_timer_interrupts_enabled(vcpu)) {
ba5c1e9b 1320 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 1321 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 1322 goto no_timer;
1323 }
1324
b3c17f10
DH		 1325 sltime = __calculate_sltime(vcpu);
1326 if (!sltime)
bda343ef
DH		 1327 return 0;
1328
1329 __set_cpu_idle(vcpu);
8b0e1953 1330 hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL);
b3c17f10 1331 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
ba5c1e9b 1332no_timer:
2031f287 1333 kvm_vcpu_srcu_read_unlock(vcpu);
91b99ea7 1334 kvm_vcpu_halt(vcpu);
75c89e52 1335 vcpu->valid_wakeup = false;
ba5c1e9b 1336 __unset_cpu_idle(vcpu);
2031f287 1337 kvm_vcpu_srcu_read_lock(vcpu);
800c1065 1338
2d00f759 1339 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 1340 return 0;
1341}
1342
0e9c85a5
DH		 1343void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
1344{
3491caf2 1345 vcpu->valid_wakeup = true;
d9847409
WL		 1346 kvm_vcpu_wake_up(vcpu);
1347
72e1ad42 1348 /*
d9847409 1349 * The VCPU might not be sleeping but rather executing VSIE. Let's
adbf1698
DH		 1350 * kick it, so it leaves the SIE to process the request.
1351 */
1352 kvm_s390_vsie_kick(vcpu);
0e9c85a5
DH		 1353}
1354
ca872302
CB		 1355enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
1356{
1357 struct kvm_vcpu *vcpu;
b3c17f10 1358 u64 sltime;
ca872302
CB		 1359
1360 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
b3c17f10 1361 sltime = __calculate_sltime(vcpu);
ca872302 1362
2d00f759
DH		 1363 /*
1364 * If the monotonic clock runs faster than the tod clock we might be
1365 * woken up too early and have to go back to sleep to avoid deadlocks.
1366 */
b3c17f10 1367 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime)))
2d00f759
DH		 1368 return HRTIMER_RESTART;
1369 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 1370 return HRTIMER_NORESTART;
1371}
ba5c1e9b 1372
2ed10cc1
JF		 1373void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
1374{
1375 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 1376
4ae3c081 1377 spin_lock(&li->lock);
383d0b05
JF		 1378 li->pending_irqs = 0;
1379 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
1380 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 1381 spin_unlock(&li->lock);
4953919f 1382
a5bd7647 1383 sca_clear_ext_call(vcpu);
2ed10cc1
JF		 1384}
1385
614aeab4 1386int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 1387{
180c12fb 1388 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
79395031 1389 int rc = 0;
16631c42 1390 bool delivered = false;
383d0b05 1391 unsigned long irq_type;
6d3da241 1392 unsigned long irqs;
ba5c1e9b
CO		 1393
1394 __reset_intercept_indicators(vcpu);
ba5c1e9b 1395
383d0b05
JF		 1396 /* pending ckc conditions might have been invalidated */
1397 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
b4aec925 1398 if (ckc_irq_pending(vcpu))
383d0b05
JF		 1399 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1400
b4aec925
DH		 1401 /* pending cpu timer conditions might have been invalidated */
1402 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1403 if (cpu_timer_irq_pending(vcpu))
1404 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1405
ffeca0ae 1406 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
c7901a6e
MM		 1407 /* bits are in the reverse order of interrupt priority */
1408 irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT);
baabee67
DH		 1409 switch (irq_type) {
1410 case IRQ_PEND_IO_ISC_0:
1411 case IRQ_PEND_IO_ISC_1:
1412 case IRQ_PEND_IO_ISC_2:
1413 case IRQ_PEND_IO_ISC_3:
1414 case IRQ_PEND_IO_ISC_4:
1415 case IRQ_PEND_IO_ISC_5:
1416 case IRQ_PEND_IO_ISC_6:
1417 case IRQ_PEND_IO_ISC_7:
6d3da241 1418 rc = __deliver_io(vcpu, irq_type);
baabee67
DH		 1419 break;
1420 case IRQ_PEND_MCHK_EX:
1421 case IRQ_PEND_MCHK_REP:
1422 rc = __deliver_machine_check(vcpu);
1423 break;
1424 case IRQ_PEND_PROG:
1425 rc = __deliver_prog(vcpu);
1426 break;
1427 case IRQ_PEND_EXT_EMERGENCY:
1428 rc = __deliver_emergency_signal(vcpu);
1429 break;
1430 case IRQ_PEND_EXT_EXTERNAL:
1431 rc = __deliver_external_call(vcpu);
1432 break;
1433 case IRQ_PEND_EXT_CLOCK_COMP:
1434 rc = __deliver_ckc(vcpu);
1435 break;
1436 case IRQ_PEND_EXT_CPU_TIMER:
1437 rc = __deliver_cpu_timer(vcpu);
1438 break;
1439 case IRQ_PEND_RESTART:
1440 rc = __deliver_restart(vcpu);
1441 break;
1442 case IRQ_PEND_SET_PREFIX:
1443 rc = __deliver_set_prefix(vcpu);
1444 break;
1445 case IRQ_PEND_PFAULT_INIT:
1446 rc = __deliver_pfault_init(vcpu);
1447 break;
1448 case IRQ_PEND_EXT_SERVICE:
1449 rc = __deliver_service(vcpu);
1450 break;
0890ddea
CB		 1451 case IRQ_PEND_EXT_SERVICE_EV:
1452 rc = __deliver_service_ev(vcpu);
1453 break;
baabee67
DH		 1454 case IRQ_PEND_PFAULT_DONE:
1455 rc = __deliver_pfault_done(vcpu);
1456 break;
1457 case IRQ_PEND_VIRTIO:
1458 rc = __deliver_virtio(vcpu);
1459 break;
1460 default:
1461 WARN_ONCE(1, "Unknown pending irq type %ld", irq_type);
1462 clear_bit(irq_type, &li->pending_irqs);
383d0b05 1463 }
16631c42
IL		 1464 delivered |= !rc;
1465 }
1466
1467 /*
1468 * We delivered at least one interrupt and modified the PC. Force a
1469 * singlestep event now.
1470 */
1471 if (delivered && guestdbg_sstep_enabled(vcpu)) {
1472 struct kvm_debug_exit_arch *debug_exit = &vcpu->run->debug.arch;
1473
1474 debug_exit->addr = vcpu->arch.sie_block->gpsw.addr;
1475 debug_exit->type = KVM_SINGLESTEP;
1476 vcpu->guest_debug |= KVM_GUESTDBG_EXIT_PENDING;
ffeca0ae 1477 }
383d0b05 1478
6d3da241 1479 set_intercept_indicators(vcpu);
79395031
JF		 1480
1481 return rc;
ba5c1e9b
CO		 1482}
1483
383d0b05 1484static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1485{
1486 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1487
ccc40c53 1488 vcpu->stat.inject_program++;
ed2afcfa
DH		 1489 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1490 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1491 irq->u.pgm.code, 0);
1492
634790b8
DH		 1493 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) {
1494 /* auto detection if no valid ILC was given */
1495 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK;
1496 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu);
1497 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID;
1498 }
1499
238293b1
DH		 1500 if (irq->u.pgm.code == PGM_PER) {
1501 li->irq.pgm.code |= PGM_PER;
634790b8 1502 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1503 /* only modify PER related information */
1504 li->irq.pgm.per_address = irq->u.pgm.per_address;
1505 li->irq.pgm.per_code = irq->u.pgm.per_code;
1506 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1507 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1508 } else if (!(irq->u.pgm.code & PGM_PER)) {
1509 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1510 irq->u.pgm.code;
634790b8 1511 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1512 /* only modify non-PER information */
1513 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1514 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1515 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1516 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1517 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1518 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1519 } else {
1520 li->irq.pgm = irq->u.pgm;
1521 }
9185124e 1522 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 1523 return 0;
1524}
1525
383d0b05 1526static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1527{
1528 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1529
ccc40c53 1530 vcpu->stat.inject_pfault_init++;
3f24ba15
CB		 1531 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1532 irq->u.ext.ext_params2);
383d0b05
JF		 1533 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1534 irq->u.ext.ext_params,
ed2afcfa 1535 irq->u.ext.ext_params2);
383d0b05
JF		 1536
1537 li->irq.ext = irq->u.ext;
1538 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
2018224d 1539 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1540 return 0;
1541}
1542
0675d92d 1543static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1544{
1545 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1546 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1547 uint16_t src_id = irq->u.extcall.code;
0146a7b0 1548
ccc40c53 1549 vcpu->stat.inject_external_call++;
3f24ba15 1550 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
ea5f4969 1551 src_id);
383d0b05 1552 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ed2afcfa 1553 src_id, 0);
ea5f4969
DH		 1554
1555 /* sending vcpu invalid */
152e9f65 1556 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
ea5f4969
DH		 1557 return -EINVAL;
1558
201ae986 1559 if (sclp.has_sigpif && !kvm_s390_pv_cpu_get_handle(vcpu))
a5bd7647 1560 return sca_inject_ext_call(vcpu, src_id);
383d0b05 1561
b938eace 1562 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
ea5f4969 1563 return -EBUSY;
383d0b05 1564 *extcall = irq->u.extcall;
2018224d 1565 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1566 return 0;
1567}
1568
383d0b05 1569static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1570{
1571 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1572 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0 1573
ccc40c53 1574 vcpu->stat.inject_set_prefix++;
ed2afcfa 1575 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
556cc0da 1576 irq->u.prefix.address);
383d0b05 1577 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
ed2afcfa 1578 irq->u.prefix.address, 0);
383d0b05 1579
a3a9c59a
DH		 1580 if (!is_vcpu_stopped(vcpu))
1581 return -EBUSY;
1582
383d0b05
JF		 1583 *prefix = irq->u.prefix;
1584 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1585 return 0;
1586}
1587
6cddd432 1588#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1589static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1590{
1591 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1592 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1593 int rc = 0;
0146a7b0 1594
ccc40c53 1595 vcpu->stat.inject_stop_signal++;
ed2afcfa 1596 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
383d0b05 1597
2822545f
DH		 1598 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1599 return -EINVAL;
1600
6cddd432
DH		 1601 if (is_vcpu_stopped(vcpu)) {
1602 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1603 rc = kvm_s390_store_status_unloaded(vcpu,
1604 KVM_S390_STORE_STATUS_NOADDR);
1605 return rc;
1606 }
1607
1608 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1609 return -EBUSY;
2822545f 1610 stop->flags = irq->u.stop.flags;
2018224d 1611 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1612 return 0;
1613}
1614
7775cbaa 1615static int __inject_sigp_restart(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1616{
1617 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1618
ccc40c53 1619 vcpu->stat.inject_restart++;
3f24ba15 1620 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
ed2afcfa 1621 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
383d0b05
JF		 1622
1623 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1624 return 0;
1625}
1626
1627static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1628 struct kvm_s390_irq *irq)
0146a7b0
JF		 1629{
1630 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1631
ccc40c53 1632 vcpu->stat.inject_emergency_signal++;
3f24ba15 1633 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
383d0b05
JF		 1634 irq->u.emerg.code);
1635 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
ed2afcfa 1636 irq->u.emerg.code, 0);
383d0b05 1637
b85de33a
DH		 1638 /* sending vcpu invalid */
1639 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1640 return -EINVAL;
1641
49538d12 1642 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1643 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
2018224d 1644 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1645 return 0;
1646}
1647
383d0b05 1648static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1649{
1650 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1651 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0 1652
ccc40c53 1653 vcpu->stat.inject_mchk++;
3f24ba15 1654 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
556cc0da 1655 irq->u.mchk.mcic);
383d0b05 1656 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
ed2afcfa 1657 irq->u.mchk.mcic);
383d0b05
JF		 1658
1659 /*
fc2020cf
JF		 1660 * Because repressible machine checks can be indicated along with
1661 * exigent machine checks (PoP, Chapter 11, Interruption action)
1662 * we need to combine cr14, mcic and external damage code.
1663 * Failing storage address and the logout area should not be or'ed
1664 * together, we just indicate the last occurrence of the corresponding
1665 * machine check
383d0b05 1666 */
fc2020cf 1667 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1668 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1669 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1670 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1671 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1672 sizeof(mchk->fixed_logout));
383d0b05
JF		 1673 if (mchk->mcic & MCHK_EX_MASK)
1674 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1675 else if (mchk->mcic & MCHK_REP_MASK)
1676 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1677 return 0;
1678}
1679
383d0b05 1680static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1681{
1682 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1683
ccc40c53 1684 vcpu->stat.inject_ckc++;
3f24ba15 1685 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
383d0b05 1686 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
ed2afcfa 1687 0, 0);
383d0b05
JF		 1688
1689 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
2018224d 1690 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1691 return 0;
1692}
1693
383d0b05 1694static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1695{
1696 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1697
ccc40c53 1698 vcpu->stat.inject_cputm++;
3f24ba15 1699 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
383d0b05 1700 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
ed2afcfa 1701 0, 0);
383d0b05
JF		 1702
1703 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
2018224d 1704 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
ba5c1e9b
CO		 1705 return 0;
1706}
1707
6d3da241
JF		 1708static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1709 int isc, u32 schid)
1710{
1711 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1712 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1713 struct kvm_s390_interrupt_info *iter;
1714 u16 id = (schid & 0xffff0000U) >> 16;
1715 u16 nr = schid & 0x0000ffffU;
1716
1717 spin_lock(&fi->lock);
1718 list_for_each_entry(iter, isc_list, list) {
1719 if (schid && (id != iter->io.subchannel_id ||
1720 nr != iter->io.subchannel_nr))
1721 continue;
1722 /* found an appropriate entry */
1723 list_del_init(&iter->list);
1724 fi->counters[FIRQ_CNTR_IO] -= 1;
1725 if (list_empty(isc_list))
ee739f4b 1726 clear_bit(isc_to_irq_type(isc), &fi->pending_irqs);
6d3da241
JF		 1727 spin_unlock(&fi->lock);
1728 return iter;
1729 }
1730 spin_unlock(&fi->lock);
1731 return NULL;
1732}
383d0b05 1733
4b35f65e
MM		 1734static struct kvm_s390_interrupt_info *get_top_io_int(struct kvm *kvm,
1735 u64 isc_mask, u32 schid)
1736{
1737 struct kvm_s390_interrupt_info *inti = NULL;
1738 int isc;
1739
1740 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1741 if (isc_mask & isc_to_isc_bits(isc))
1742 inti = get_io_int(kvm, isc, schid);
1743 }
1744 return inti;
1745}
1746
1747static int get_top_gisa_isc(struct kvm *kvm, u64 isc_mask, u32 schid)
1748{
982cff42 1749 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
4b35f65e
MM		 1750 unsigned long active_mask;
1751 int isc;
1752
1753 if (schid)
1754 goto out;
982cff42 1755 if (!gi->origin)
4b35f65e
MM		 1756 goto out;
1757
982cff42 1758 active_mask = (isc_mask & gisa_get_ipm(gi->origin) << 24) << 32;
4b35f65e
MM		 1759 while (active_mask) {
1760 isc = __fls(active_mask) ^ (BITS_PER_LONG - 1);
982cff42 1761 if (gisa_tac_ipm_gisc(gi->origin, isc))
4b35f65e
MM		 1762 return isc;
1763 clear_bit_inv(isc, &active_mask);
1764 }
1765out:
1766 return -EINVAL;
1767}
1768
6d3da241
JF		 1769/*
1770 * Dequeue and return an I/O interrupt matching any of the interruption
1771 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
4b35f65e
MM		 1772 * Take into account the interrupts pending in the interrupt list and in GISA.
1773 *
1774 * Note that for a guest that does not enable I/O interrupts
1775 * but relies on TPI, a flood of classic interrupts may starve
1776 * out adapter interrupts on the same isc. Linux does not do
1777 * that, and it is possible to work around the issue by configuring
1778 * different iscs for classic and adapter interrupts in the guest,
1779 * but we may want to revisit this in the future.
6d3da241 1780 */
fa6b7fe9 1781struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241
JF		 1782 u64 isc_mask, u32 schid)
1783{
982cff42 1784 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
4b35f65e 1785 struct kvm_s390_interrupt_info *inti, *tmp_inti;
6d3da241
JF		 1786 int isc;
1787
4b35f65e
MM		 1788 inti = get_top_io_int(kvm, isc_mask, schid);
1789
1790 isc = get_top_gisa_isc(kvm, isc_mask, schid);
1791 if (isc < 0)
1792 /* no AI in GISA */
1793 goto out;
1794
1795 if (!inti)
1796 /* AI in GISA but no classical IO int */
1797 goto gisa_out;
1798
1799 /* both types of interrupts present */
1800 if (int_word_to_isc(inti->io.io_int_word) <= isc) {
1801 /* classical IO int with higher priority */
982cff42 1802 gisa_set_ipm_gisc(gi->origin, isc);
4b35f65e 1803 goto out;
6d3da241 1804 }
4b35f65e 1805gisa_out:
c4196218 1806 tmp_inti = kzalloc(sizeof(*inti), GFP_KERNEL_ACCOUNT);
4b35f65e
MM		 1807 if (tmp_inti) {
1808 tmp_inti->type = KVM_S390_INT_IO(1, 0, 0, 0);
1809 tmp_inti->io.io_int_word = isc_to_int_word(isc);
1810 if (inti)
1811 kvm_s390_reinject_io_int(kvm, inti);
1812 inti = tmp_inti;
1813 } else
982cff42 1814 gisa_set_ipm_gisc(gi->origin, isc);
4b35f65e 1815out:
6d3da241
JF		 1816 return inti;
1817}
1818
6d3da241
JF		 1819static int __inject_service(struct kvm *kvm,
1820 struct kvm_s390_interrupt_info *inti)
1821{
1822 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1823
ccc40c53 1824 kvm->stat.inject_service_signal++;
6d3da241
JF		 1825 spin_lock(&fi->lock);
1826 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
0890ddea
CB		 1827
1828 /* We always allow events, track them separately from the sccb ints */
1829 if (fi->srv_signal.ext_params & SCCB_EVENT_PENDING)
1830 set_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs);
1831
6d3da241
JF		 1832 /*
1833 * Early versions of the QEMU s390 bios will inject several
1834 * service interrupts after another without handling a
1835 * condition code indicating busy.
1836 * We will silently ignore those superfluous sccb values.
1837 * A future version of QEMU will take care of serialization
1838 * of servc requests
1839 */
1840 if (fi->srv_signal.ext_params & SCCB_MASK)
1841 goto out;
1842 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1843 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1844out:
1845 spin_unlock(&fi->lock);
1846 kfree(inti);
1847 return 0;
1848}
1849
1850static int __inject_virtio(struct kvm *kvm,
1851 struct kvm_s390_interrupt_info *inti)
1852{
1853 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1854
ccc40c53 1855 kvm->stat.inject_virtio++;
6d3da241
JF		 1856 spin_lock(&fi->lock);
1857 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1858 spin_unlock(&fi->lock);
1859 return -EBUSY;
1860 }
1861 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1862 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1863 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1864 spin_unlock(&fi->lock);
1865 return 0;
1866}
1867
1868static int __inject_pfault_done(struct kvm *kvm,
1869 struct kvm_s390_interrupt_info *inti)
1870{
1871 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1872
ccc40c53 1873 kvm->stat.inject_pfault_done++;
6d3da241
JF		 1874 spin_lock(&fi->lock);
1875 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1876 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1877 spin_unlock(&fi->lock);
1878 return -EBUSY;
1879 }
1880 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1881 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1882 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1883 spin_unlock(&fi->lock);
1884 return 0;
1885}
1886
1887#define CR_PENDING_SUBCLASS 28
1888static int __inject_float_mchk(struct kvm *kvm,
1889 struct kvm_s390_interrupt_info *inti)
1890{
1891 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1892
ccc40c53 1893 kvm->stat.inject_float_mchk++;
6d3da241
JF		 1894 spin_lock(&fi->lock);
1895 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1896 fi->mchk.mcic |= inti->mchk.mcic;
1897 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1898 spin_unlock(&fi->lock);
1899 kfree(inti);
1900 return 0;
1901}
1902
1903static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
fa6b7fe9 1904{
982cff42 1905 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
fa6b7fe9 1906 struct kvm_s390_float_interrupt *fi;
6d3da241
JF		 1907 struct list_head *list;
1908 int isc;
fa6b7fe9 1909
ccc40c53 1910 kvm->stat.inject_io++;
d7c5cb01
MM		 1911 isc = int_word_to_isc(inti->io.io_int_word);
1912
201ae986 1913 /*
ee6a569d
MM		 1914 * We do not use the lock checking variant as this is just a
1915 * performance optimization and we do not hold the lock here.
1916 * This is ok as the code will pick interrupts from both "lists"
1917 * for delivery.
201ae986 1918 */
ee6a569d 1919 if (gi->origin && inti->type & KVM_S390_INT_IO_AI_MASK) {
d7c5cb01 1920 VM_EVENT(kvm, 4, "%s isc %1u", "inject: I/O (AI/gisa)", isc);
982cff42 1921 gisa_set_ipm_gisc(gi->origin, isc);
d7c5cb01
MM		 1922 kfree(inti);
1923 return 0;
1924 }
1925
fa6b7fe9
CH		 1926 fi = &kvm->arch.float_int;
1927 spin_lock(&fi->lock);
6d3da241
JF		 1928 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1929 spin_unlock(&fi->lock);
1930 return -EBUSY;
a91b8ebe 1931 }
6d3da241
JF		 1932 fi->counters[FIRQ_CNTR_IO] += 1;
1933
dcc98ea6
CB		 1934 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1935 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)");
1936 else
1937 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x",
1938 inti->io.subchannel_id >> 8,
1939 inti->io.subchannel_id >> 1 & 0x3,
1940 inti->io.subchannel_nr);
6d3da241
JF		 1941 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1942 list_add_tail(&inti->list, list);
ee739f4b 1943 set_bit(isc_to_irq_type(isc), &fi->pending_irqs);
fa6b7fe9 1944 spin_unlock(&fi->lock);
6d3da241 1945 return 0;
fa6b7fe9 1946}
ba5c1e9b 1947
96e0ed23
DH		 1948/*
1949 * Find a destination VCPU for a floating irq and kick it.
1950 */
1951static void __floating_irq_kick(struct kvm *kvm, u64 type)
ba5c1e9b 1952{
96e0ed23
DH		 1953 struct kvm_vcpu *dst_vcpu;
1954 int sigcpu, online_vcpus, nr_tries = 0;
1955
1956 online_vcpus = atomic_read(&kvm->online_vcpus);
1957 if (!online_vcpus)
1958 return;
1959
1960 /* find idle VCPUs first, then round robin */
246b7218 1961 sigcpu = find_first_bit(kvm->arch.idle_mask, online_vcpus);
96e0ed23
DH		 1962 if (sigcpu == online_vcpus) {
1963 do {
246b7218
MM		 1964 sigcpu = kvm->arch.float_int.next_rr_cpu++;
1965 kvm->arch.float_int.next_rr_cpu %= online_vcpus;
96e0ed23
DH		 1966 /* avoid endless loops if all vcpus are stopped */
1967 if (nr_tries++ >= online_vcpus)
1968 return;
1969 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1970 }
1971 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1972
1973 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
96e0ed23
DH		 1974 switch (type) {
1975 case KVM_S390_MCHK:
2018224d 1976 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT);
96e0ed23
DH		 1977 break;
1978 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
982cff42 1979 if (!(type & KVM_S390_INT_IO_AI_MASK &&
201ae986
MM		 1980 kvm->arch.gisa_int.origin) ||
1981 kvm_s390_pv_cpu_get_handle(dst_vcpu))
a9810327 1982 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT);
96e0ed23
DH		 1983 break;
1984 default:
2018224d 1985 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT);
96e0ed23
DH		 1986 break;
1987 }
96e0ed23
DH		 1988 kvm_s390_vcpu_wakeup(dst_vcpu);
1989}
1990
1991static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1992{
6d3da241
JF		 1993 u64 type = READ_ONCE(inti->type);
1994 int rc;
ba5c1e9b 1995
6d3da241
JF		 1996 switch (type) {
1997 case KVM_S390_MCHK:
1998 rc = __inject_float_mchk(kvm, inti);
1999 break;
2000 case KVM_S390_INT_VIRTIO:
2001 rc = __inject_virtio(kvm, inti);
2002 break;
2003 case KVM_S390_INT_SERVICE:
2004 rc = __inject_service(kvm, inti);
2005 break;
2006 case KVM_S390_INT_PFAULT_DONE:
2007 rc = __inject_pfault_done(kvm, inti);
2008 break;
2009 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
2010 rc = __inject_io(kvm, inti);
2011 break;
2012 default:
a91b8ebe 2013 rc = -EINVAL;
c05c4186 2014 }
6d3da241
JF		 2015 if (rc)
2016 return rc;
2017
96e0ed23 2018 __floating_irq_kick(kvm, type);
6d3da241 2019 return 0;
c05c4186
JF		 2020}
2021
2022int kvm_s390_inject_vm(struct kvm *kvm,
2023 struct kvm_s390_interrupt *s390int)
2024{
2025 struct kvm_s390_interrupt_info *inti;
428d53be 2026 int rc;
c05c4186 2027
c4196218 2028 inti = kzalloc(sizeof(*inti), GFP_KERNEL_ACCOUNT);
ba5c1e9b
CO		 2029 if (!inti)
2030 return -ENOMEM;
2031
c05c4186
JF		 2032 inti->type = s390int->type;
2033 switch (inti->type) {
ba5c1e9b 2034 case KVM_S390_INT_VIRTIO:
33e19115 2035 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 2036 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 2037 inti->ext.ext_params = s390int->parm;
2038 inti->ext.ext_params2 = s390int->parm64;
2039 break;
2040 case KVM_S390_INT_SERVICE:
3f24ba15 2041 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 2042 inti->ext.ext_params = s390int->parm;
2043 break;
3c038e6b 2044 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 2045 inti->ext.ext_params2 = s390int->parm64;
2046 break;
48a3e950 2047 case KVM_S390_MCHK:
3f24ba15 2048 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
48a3e950 2049 s390int->parm64);
48a3e950
CH		 2050 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
2051 inti->mchk.mcic = s390int->parm64;
2052 break;
d8346b7d 2053 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
d8346b7d
CH		 2054 inti->io.subchannel_id = s390int->parm >> 16;
2055 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
2056 inti->io.io_int_parm = s390int->parm64 >> 32;
2057 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
2058 break;
ba5c1e9b
CO		 2059 default:
2060 kfree(inti);
2061 return -EINVAL;
2062 }
ade38c31
CH		 2063 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
2064 2);
ba5c1e9b 2065
428d53be
DH		 2066 rc = __inject_vm(kvm, inti);
2067 if (rc)
2068 kfree(inti);
2069 return rc;
ba5c1e9b
CO		 2070}
2071
15462e37 2072int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 2073 struct kvm_s390_interrupt_info *inti)
2074{
15462e37 2075 return __inject_vm(kvm, inti);
2f32d4ea
CH		 2076}
2077
383d0b05
JF		 2078int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
2079 struct kvm_s390_irq *irq)
2080{
2081 irq->type = s390int->type;
2082 switch (irq->type) {
2083 case KVM_S390_PROGRAM_INT:
2084 if (s390int->parm & 0xffff0000)
2085 return -EINVAL;
2086 irq->u.pgm.code = s390int->parm;
2087 break;
2088 case KVM_S390_SIGP_SET_PREFIX:
2089 irq->u.prefix.address = s390int->parm;
2090 break;
2822545f
DH		 2091 case KVM_S390_SIGP_STOP:
2092 irq->u.stop.flags = s390int->parm;
2093 break;
383d0b05 2094 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 2095 if (s390int->parm & 0xffff0000)
383d0b05
JF		 2096 return -EINVAL;
2097 irq->u.extcall.code = s390int->parm;
2098 break;
2099 case KVM_S390_INT_EMERGENCY:
94d1f564 2100 if (s390int->parm & 0xffff0000)
383d0b05
JF		 2101 return -EINVAL;
2102 irq->u.emerg.code = s390int->parm;
2103 break;
2104 case KVM_S390_MCHK:
2105 irq->u.mchk.mcic = s390int->parm64;
2106 break;
53936b5b
TH		 2107 case KVM_S390_INT_PFAULT_INIT:
2108 irq->u.ext.ext_params = s390int->parm;
2109 irq->u.ext.ext_params2 = s390int->parm64;
2110 break;
2111 case KVM_S390_RESTART:
2112 case KVM_S390_INT_CLOCK_COMP:
2113 case KVM_S390_INT_CPU_TIMER:
2114 break;
2115 default:
2116 return -EINVAL;
383d0b05
JF		 2117 }
2118 return 0;
2119}
2120
6cddd432
DH		 2121int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
2122{
2123 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2124
2125 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
2126}
2127
812de046
EF		 2128int kvm_s390_is_restart_irq_pending(struct kvm_vcpu *vcpu)
2129{
2130 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2131
2132 return test_bit(IRQ_PEND_RESTART, &li->pending_irqs);
2133}
2134
6cddd432
DH		 2135void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
2136{
2137 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2138
2139 spin_lock(&li->lock);
2140 li->irq.stop.flags = 0;
2141 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
2142 spin_unlock(&li->lock);
2143}
2144
79e87a10 2145static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 2146{
0146a7b0 2147 int rc;
ba5c1e9b 2148
383d0b05 2149 switch (irq->type) {
ba5c1e9b 2150 case KVM_S390_PROGRAM_INT:
383d0b05 2151 rc = __inject_prog(vcpu, irq);
ba5c1e9b 2152 break;
b7e6e4d3 2153 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 2154 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 2155 break;
ba5c1e9b 2156 case KVM_S390_SIGP_STOP:
383d0b05 2157 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 2158 break;
ba5c1e9b 2159 case KVM_S390_RESTART:
7775cbaa 2160 rc = __inject_sigp_restart(vcpu);
0146a7b0 2161 break;
e029ae5b 2162 case KVM_S390_INT_CLOCK_COMP:
383d0b05 2163 rc = __inject_ckc(vcpu);
0146a7b0 2164 break;
e029ae5b 2165 case KVM_S390_INT_CPU_TIMER:
383d0b05 2166 rc = __inject_cpu_timer(vcpu);
82a12737 2167 break;
7697e71f 2168 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 2169 rc = __inject_extcall(vcpu, irq);
82a12737 2170 break;
ba5c1e9b 2171 case KVM_S390_INT_EMERGENCY:
383d0b05 2172 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 2173 break;
48a3e950 2174 case KVM_S390_MCHK:
383d0b05 2175 rc = __inject_mchk(vcpu, irq);
48a3e950 2176 break;
3c038e6b 2177 case KVM_S390_INT_PFAULT_INIT:
383d0b05 2178 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 2179 break;
ba5c1e9b
CO		 2180 case KVM_S390_INT_VIRTIO:
2181 case KVM_S390_INT_SERVICE:
d8346b7d 2182 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 2183 default:
0146a7b0 2184 rc = -EINVAL;
ba5c1e9b 2185 }
79e87a10
JF		 2186
2187 return rc;
2188}
2189
2190int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
2191{
2192 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2193 int rc;
2194
2195 spin_lock(&li->lock);
2196 rc = do_inject_vcpu(vcpu, irq);
4ae3c081 2197 spin_unlock(&li->lock);
0146a7b0
JF		 2198 if (!rc)
2199 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 2200 return rc;
ba5c1e9b 2201}
c05c4186 2202
6d3da241 2203static inline void clear_irq_list(struct list_head *_list)
c05c4186 2204{
6d3da241 2205 struct kvm_s390_interrupt_info *inti, *n;
c05c4186 2206
6d3da241 2207 list_for_each_entry_safe(inti, n, _list, list) {
c05c4186
JF		 2208 list_del(&inti->list);
2209 kfree(inti);
2210 }
c05c4186
JF		 2211}
2212
94aa033e
JF		 2213static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
2214 struct kvm_s390_irq *irq)
c05c4186 2215{
94aa033e 2216 irq->type = inti->type;
c05c4186 2217 switch (inti->type) {
3c038e6b
DD		 2218 case KVM_S390_INT_PFAULT_INIT:
2219 case KVM_S390_INT_PFAULT_DONE:
c05c4186 2220 case KVM_S390_INT_VIRTIO:
94aa033e 2221 irq->u.ext = inti->ext;
c05c4186
JF		 2222 break;
2223 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 2224 irq->u.io = inti->io;
c05c4186 2225 break;
c05c4186 2226 }
c05c4186
JF		 2227}
2228
6d3da241
JF		 2229void kvm_s390_clear_float_irqs(struct kvm *kvm)
2230{
2231 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2232 int i;
2233
0890ddea
CB		 2234 mutex_lock(&kvm->lock);
2235 if (!kvm_s390_pv_is_protected(kvm))
2236 fi->masked_irqs = 0;
2237 mutex_unlock(&kvm->lock);
6d3da241 2238 spin_lock(&fi->lock);
f2ae45ed
JF		 2239 fi->pending_irqs = 0;
2240 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
2241 memset(&fi->mchk, 0, sizeof(fi->mchk));
6d3da241
JF		 2242 for (i = 0; i < FIRQ_LIST_COUNT; i++)
2243 clear_irq_list(&fi->lists[i]);
2244 for (i = 0; i < FIRQ_MAX_COUNT; i++)
2245 fi->counters[i] = 0;
2246 spin_unlock(&fi->lock);
24160af6 2247 kvm_s390_gisa_clear(kvm);
6d3da241
JF		 2248};
2249
94aa033e 2250static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186 2251{
982cff42 2252 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
c05c4186
JF		 2253 struct kvm_s390_interrupt_info *inti;
2254 struct kvm_s390_float_interrupt *fi;
94aa033e 2255 struct kvm_s390_irq *buf;
6d3da241 2256 struct kvm_s390_irq *irq;
94aa033e 2257 int max_irqs;
c05c4186
JF		 2258 int ret = 0;
2259 int n = 0;
6d3da241 2260 int i;
c05c4186 2261
94aa033e
JF		 2262 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
2263 return -EINVAL;
2264
2265 /*
2266 * We are already using -ENOMEM to signal
2267 * userspace it may retry with a bigger buffer,
2268 * so we need to use something else for this case
2269 */
2270 buf = vzalloc(len);
2271 if (!buf)
2272 return -ENOBUFS;
2273
2274 max_irqs = len / sizeof(struct kvm_s390_irq);
2275
982cff42 2276 if (gi->origin && gisa_get_ipm(gi->origin)) {
24160af6
MM		 2277 for (i = 0; i <= MAX_ISC; i++) {
2278 if (n == max_irqs) {
2279 /* signal userspace to try again */
2280 ret = -ENOMEM;
2281 goto out_nolock;
2282 }
982cff42 2283 if (gisa_tac_ipm_gisc(gi->origin, i)) {
24160af6
MM		 2284 irq = (struct kvm_s390_irq *) &buf[n];
2285 irq->type = KVM_S390_INT_IO(1, 0, 0, 0);
2286 irq->u.io.io_int_word = isc_to_int_word(i);
2287 n++;
2288 }
2289 }
2290 }
c05c4186
JF		 2291 fi = &kvm->arch.float_int;
2292 spin_lock(&fi->lock);
6d3da241
JF		 2293 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
2294 list_for_each_entry(inti, &fi->lists[i], list) {
2295 if (n == max_irqs) {
2296 /* signal userspace to try again */
2297 ret = -ENOMEM;
2298 goto out;
2299 }
2300 inti_to_irq(inti, &buf[n]);
2301 n++;
2302 }
2303 }
0890ddea
CB		 2304 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs) ||
2305 test_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs)) {
94aa033e 2306 if (n == max_irqs) {
c05c4186
JF		 2307 /* signal userspace to try again */
2308 ret = -ENOMEM;
6d3da241 2309 goto out;
c05c4186 2310 }
6d3da241
JF		 2311 irq = (struct kvm_s390_irq *) &buf[n];
2312 irq->type = KVM_S390_INT_SERVICE;
2313 irq->u.ext = fi->srv_signal;
c05c4186
JF		 2314 n++;
2315 }
6d3da241
JF		 2316 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
2317 if (n == max_irqs) {
2318 /* signal userspace to try again */
2319 ret = -ENOMEM;
2320 goto out;
2321 }
2322 irq = (struct kvm_s390_irq *) &buf[n];
2323 irq->type = KVM_S390_MCHK;
2324 irq->u.mchk = fi->mchk;
2325 n++;
2326}
2327
2328out:
c05c4186 2329 spin_unlock(&fi->lock);
24160af6 2330out_nolock:
94aa033e
JF		 2331 if (!ret && n > 0) {
2332 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
2333 ret = -EFAULT;
2334 }
2335 vfree(buf);
c05c4186
JF		 2336
2337 return ret < 0 ? ret : n;
2338}
2339
2c1a48f2
YMZ		 2340static int flic_ais_mode_get_all(struct kvm *kvm, struct kvm_device_attr *attr)
2341{
2342 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2343 struct kvm_s390_ais_all ais;
2344
2345 if (attr->attr < sizeof(ais))
2346 return -EINVAL;
2347
2348 if (!test_kvm_facility(kvm, 72))
c6119908 2349 return -EOPNOTSUPP;
2c1a48f2
YMZ		 2350
2351 mutex_lock(&fi->ais_lock);
2352 ais.simm = fi->simm;
2353 ais.nimm = fi->nimm;
2354 mutex_unlock(&fi->ais_lock);
2355
2356 if (copy_to_user((void __user *)attr->addr, &ais, sizeof(ais)))
2357 return -EFAULT;
2358
2359 return 0;
2360}
2361
c05c4186
JF		 2362static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2363{
2364 int r;
2365
2366 switch (attr->group) {
2367 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 2368 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 2369 attr->attr);
2370 break;
2c1a48f2
YMZ		 2371 case KVM_DEV_FLIC_AISM_ALL:
2372 r = flic_ais_mode_get_all(dev->kvm, attr);
2373 break;
c05c4186
JF		 2374 default:
2375 r = -EINVAL;
2376 }
2377
2378 return r;
2379}
2380
2381static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
2382 u64 addr)
2383{
2384 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
2385 void *target = NULL;
2386 void __user *source;
2387 u64 size;
2388
2389 if (get_user(inti->type, (u64 __user *)addr))
2390 return -EFAULT;
2391
2392 switch (inti->type) {
3c038e6b
DD		 2393 case KVM_S390_INT_PFAULT_INIT:
2394 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 2395 case KVM_S390_INT_VIRTIO:
2396 case KVM_S390_INT_SERVICE:
2397 target = (void *) &inti->ext;
2398 source = &uptr->u.ext;
2399 size = sizeof(inti->ext);
2400 break;
2401 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
2402 target = (void *) &inti->io;
2403 source = &uptr->u.io;
2404 size = sizeof(inti->io);
2405 break;
2406 case KVM_S390_MCHK:
2407 target = (void *) &inti->mchk;
2408 source = &uptr->u.mchk;
2409 size = sizeof(inti->mchk);
2410 break;
2411 default:
2412 return -EINVAL;
2413 }
2414
2415 if (copy_from_user(target, source, size))
2416 return -EFAULT;
2417
2418 return 0;
2419}
2420
2421static int enqueue_floating_irq(struct kvm_device *dev,
2422 struct kvm_device_attr *attr)
2423{
2424 struct kvm_s390_interrupt_info *inti = NULL;
2425 int r = 0;
2426 int len = attr->attr;
2427
2428 if (len % sizeof(struct kvm_s390_irq) != 0)
2429 return -EINVAL;
2430 else if (len > KVM_S390_FLIC_MAX_BUFFER)
2431 return -EINVAL;
2432
2433 while (len >= sizeof(struct kvm_s390_irq)) {
c4196218 2434 inti = kzalloc(sizeof(*inti), GFP_KERNEL_ACCOUNT);
c05c4186
JF		 2435 if (!inti)
2436 return -ENOMEM;
2437
2438 r = copy_irq_from_user(inti, attr->addr);
2439 if (r) {
2440 kfree(inti);
2441 return r;
2442 }
a91b8ebe
JF		 2443 r = __inject_vm(dev->kvm, inti);
2444 if (r) {
2445 kfree(inti);
2446 return r;
2447 }
c05c4186
JF		 2448 len -= sizeof(struct kvm_s390_irq);
2449 attr->addr += sizeof(struct kvm_s390_irq);
2450 }
2451
2452 return r;
2453}
2454
841b91c5
CH		 2455static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
2456{
2457 if (id >= MAX_S390_IO_ADAPTERS)
2458 return NULL;
58616e6a 2459 id = array_index_nospec(id, MAX_S390_IO_ADAPTERS);
841b91c5
CH		 2460 return kvm->arch.adapters[id];
2461}
2462
2463static int register_io_adapter(struct kvm_device *dev,
2464 struct kvm_device_attr *attr)
2465{
2466 struct s390_io_adapter *adapter;
2467 struct kvm_s390_io_adapter adapter_info;
2468
2469 if (copy_from_user(&adapter_info,
2470 (void __user *)attr->addr, sizeof(adapter_info)))
2471 return -EFAULT;
2472
58616e6a
EF		 2473 if (adapter_info.id >= MAX_S390_IO_ADAPTERS)
2474 return -EINVAL;
2475
2476 adapter_info.id = array_index_nospec(adapter_info.id,
2477 MAX_S390_IO_ADAPTERS);
2478
2479 if (dev->kvm->arch.adapters[adapter_info.id] != NULL)
841b91c5
CH		 2480 return -EINVAL;
2481
c4196218 2482 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL_ACCOUNT);
841b91c5
CH		 2483 if (!adapter)
2484 return -ENOMEM;
2485
841b91c5
CH		 2486 adapter->id = adapter_info.id;
2487 adapter->isc = adapter_info.isc;
2488 adapter->maskable = adapter_info.maskable;
2489 adapter->masked = false;
2490 adapter->swap = adapter_info.swap;
08fab50d
FL		 2491 adapter->suppressible = (adapter_info.flags) &
2492 KVM_S390_ADAPTER_SUPPRESSIBLE;
841b91c5
CH		 2493 dev->kvm->arch.adapters[adapter->id] = adapter;
2494
2495 return 0;
2496}
2497
2498int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
2499{
2500 int ret;
2501 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2502
2503 if (!adapter || !adapter->maskable)
2504 return -EINVAL;
2505 ret = adapter->masked;
2506 adapter->masked = masked;
2507 return ret;
2508}
2509
841b91c5
CH		 2510void kvm_s390_destroy_adapters(struct kvm *kvm)
2511{
2512 int i;
841b91c5 2513
f6547066 2514 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++)
841b91c5 2515 kfree(kvm->arch.adapters[i]);
841b91c5
CH		 2516}
2517
2518static int modify_io_adapter(struct kvm_device *dev,
2519 struct kvm_device_attr *attr)
2520{
2521 struct kvm_s390_io_adapter_req req;
2522 struct s390_io_adapter *adapter;
2523 int ret;
2524
2525 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2526 return -EFAULT;
2527
2528 adapter = get_io_adapter(dev->kvm, req.id);
2529 if (!adapter)
2530 return -EINVAL;
2531 switch (req.type) {
2532 case KVM_S390_IO_ADAPTER_MASK:
2533 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
2534 if (ret > 0)
2535 ret = 0;
2536 break;
f6547066
UW		 2537 /*
2538 * The following operations are no longer needed and therefore no-ops.
2539 * The gpa to hva translation is done when an IRQ route is set up. The
2540 * set_irq code uses get_user_pages_remote() to do the actual write.
2541 */
841b91c5 2542 case KVM_S390_IO_ADAPTER_MAP:
841b91c5 2543 case KVM_S390_IO_ADAPTER_UNMAP:
f6547066 2544 ret = 0;
841b91c5
CH		 2545 break;
2546 default:
2547 ret = -EINVAL;
2548 }
2549
2550 return ret;
2551}
2552
6d28f789
HP		 2553static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
2554
2555{
2556 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
2557 u32 schid;
2558
2559 if (attr->flags)
2560 return -EINVAL;
2561 if (attr->attr != sizeof(schid))
2562 return -EINVAL;
2563 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
2564 return -EFAULT;
4dd6f17e
MM		 2565 if (!schid)
2566 return -EINVAL;
6d28f789
HP		 2567 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
2568 /*
2569 * If userspace is conforming to the architecture, we can have at most
2570 * one pending I/O interrupt per subchannel, so this is effectively a
2571 * clear all.
2572 */
2573 return 0;
2574}
2575
51978393
FL		 2576static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr)
2577{
2578 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2579 struct kvm_s390_ais_req req;
2580 int ret = 0;
2581
1ba15b24 2582 if (!test_kvm_facility(kvm, 72))
c6119908 2583 return -EOPNOTSUPP;
51978393
FL		 2584
2585 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2586 return -EFAULT;
2587
2588 if (req.isc > MAX_ISC)
2589 return -EINVAL;
2590
2591 trace_kvm_s390_modify_ais_mode(req.isc,
2592 (fi->simm & AIS_MODE_MASK(req.isc)) ?
2593 (fi->nimm & AIS_MODE_MASK(req.isc)) ?
2594 2 : KVM_S390_AIS_MODE_SINGLE :
2595 KVM_S390_AIS_MODE_ALL, req.mode);
2596
2597 mutex_lock(&fi->ais_lock);
2598 switch (req.mode) {
2599 case KVM_S390_AIS_MODE_ALL:
2600 fi->simm &= ~AIS_MODE_MASK(req.isc);
2601 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2602 break;
2603 case KVM_S390_AIS_MODE_SINGLE:
2604 fi->simm |= AIS_MODE_MASK(req.isc);
2605 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2606 break;
2607 default:
2608 ret = -EINVAL;
2609 }
2610 mutex_unlock(&fi->ais_lock);
2611
2612 return ret;
2613}
2614
a8920950
YMZ		 2615static int kvm_s390_inject_airq(struct kvm *kvm,
2616 struct s390_io_adapter *adapter)
2617{
2618 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2619 struct kvm_s390_interrupt s390int = {
2620 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2621 .parm = 0,
2496c8e7 2622 .parm64 = isc_to_int_word(adapter->isc),
a8920950
YMZ		 2623 };
2624 int ret = 0;
2625
1ba15b24 2626 if (!test_kvm_facility(kvm, 72) || !adapter->suppressible)
a8920950
YMZ		 2627 return kvm_s390_inject_vm(kvm, &s390int);
2628
2629 mutex_lock(&fi->ais_lock);
2630 if (fi->nimm & AIS_MODE_MASK(adapter->isc)) {
2631 trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc);
2632 goto out;
2633 }
2634
2635 ret = kvm_s390_inject_vm(kvm, &s390int);
2636 if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) {
2637 fi->nimm |= AIS_MODE_MASK(adapter->isc);
2638 trace_kvm_s390_modify_ais_mode(adapter->isc,
2639 KVM_S390_AIS_MODE_SINGLE, 2);
2640 }
2641out:
2642 mutex_unlock(&fi->ais_lock);
2643 return ret;
2644}
2645
2646static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr)
2647{
2648 unsigned int id = attr->attr;
2649 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2650
2651 if (!adapter)
2652 return -EINVAL;
2653
2654 return kvm_s390_inject_airq(kvm, adapter);
2655}
2656
2c1a48f2
YMZ		 2657static int flic_ais_mode_set_all(struct kvm *kvm, struct kvm_device_attr *attr)
2658{
2659 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2660 struct kvm_s390_ais_all ais;
2661
2662 if (!test_kvm_facility(kvm, 72))
c6119908 2663 return -EOPNOTSUPP;
2c1a48f2
YMZ		 2664
2665 if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais)))
2666 return -EFAULT;
2667
2668 mutex_lock(&fi->ais_lock);
2669 fi->simm = ais.simm;
2670 fi->nimm = ais.nimm;
2671 mutex_unlock(&fi->ais_lock);
2672
2673 return 0;
2674}
2675
c05c4186
JF		 2676static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2677{
2678 int r = 0;
46808a4c 2679 unsigned long i;
3c038e6b 2680 struct kvm_vcpu *vcpu;
c05c4186
JF		 2681
2682 switch (attr->group) {
2683 case KVM_DEV_FLIC_ENQUEUE:
2684 r = enqueue_floating_irq(dev, attr);
2685 break;
2686 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 2687 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 2688 break;
3c038e6b
DD		 2689 case KVM_DEV_FLIC_APF_ENABLE:
2690 dev->kvm->arch.gmap->pfault_enabled = 1;
2691 break;
2692 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2693 dev->kvm->arch.gmap->pfault_enabled = 0;
2694 /*
2695 * Make sure no async faults are in transition when
2696 * clearing the queues. So we don't need to worry
2697 * about late coming workers.
2698 */
2699 synchronize_srcu(&dev->kvm->srcu);
2700 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2701 kvm_clear_async_pf_completion_queue(vcpu);
2702 break;
841b91c5
CH		 2703 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2704 r = register_io_adapter(dev, attr);
2705 break;
2706 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2707 r = modify_io_adapter(dev, attr);
2708 break;
6d28f789
HP		 2709 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2710 r = clear_io_irq(dev->kvm, attr);
2711 break;
51978393
FL		 2712 case KVM_DEV_FLIC_AISM:
2713 r = modify_ais_mode(dev->kvm, attr);
2714 break;
a8920950
YMZ		 2715 case KVM_DEV_FLIC_AIRQ_INJECT:
2716 r = flic_inject_airq(dev->kvm, attr);
2717 break;
2c1a48f2
YMZ		 2718 case KVM_DEV_FLIC_AISM_ALL:
2719 r = flic_ais_mode_set_all(dev->kvm, attr);
2720 break;
c05c4186
JF		 2721 default:
2722 r = -EINVAL;
2723 }
2724
2725 return r;
2726}
2727
4f129858
HP		 2728static int flic_has_attr(struct kvm_device *dev,
2729 struct kvm_device_attr *attr)
2730{
2731 switch (attr->group) {
2732 case KVM_DEV_FLIC_GET_ALL_IRQS:
2733 case KVM_DEV_FLIC_ENQUEUE:
2734 case KVM_DEV_FLIC_CLEAR_IRQS:
2735 case KVM_DEV_FLIC_APF_ENABLE:
2736 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2737 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2738 case KVM_DEV_FLIC_ADAPTER_MODIFY:
6d28f789 2739 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
51978393 2740 case KVM_DEV_FLIC_AISM:
a8920950 2741 case KVM_DEV_FLIC_AIRQ_INJECT:
2c1a48f2 2742 case KVM_DEV_FLIC_AISM_ALL:
4f129858
HP		 2743 return 0;
2744 }
2745 return -ENXIO;
2746}
2747
c05c4186
JF		 2748static int flic_create(struct kvm_device *dev, u32 type)
2749{
2750 if (!dev)
2751 return -EINVAL;
2752 if (dev->kvm->arch.flic)
2753 return -EINVAL;
2754 dev->kvm->arch.flic = dev;
2755 return 0;
2756}
2757
2758static void flic_destroy(struct kvm_device *dev)
2759{
2760 dev->kvm->arch.flic = NULL;
2761 kfree(dev);
2762}
2763
2764/* s390 floating irq controller (flic) */
2765struct kvm_device_ops kvm_flic_ops = {
2766 .name = "kvm-flic",
2767 .get_attr = flic_get_attr,
2768 .set_attr = flic_set_attr,
4f129858 2769 .has_attr = flic_has_attr,
c05c4186
JF		 2770 .create = flic_create,
2771 .destroy = flic_destroy,
2772};
84223598
CH		 2773
2774static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2775{
2776 unsigned long bit;
2777
2778 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2779
2780 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2781}
2782
f6547066 2783static struct page *get_map_page(struct kvm *kvm, u64 uaddr)
84223598 2784{
f6547066 2785 struct page *page = NULL;
84223598 2786
d8ed45c5 2787 mmap_read_lock(kvm->mm);
64019a2e 2788 get_user_pages_remote(kvm->mm, uaddr, 1, FOLL_WRITE,
ca5e8632 2789 &page, NULL);
d8ed45c5 2790 mmap_read_unlock(kvm->mm);
f6547066 2791 return page;
84223598
CH		 2792}
2793
2794static int adapter_indicators_set(struct kvm *kvm,
2795 struct s390_io_adapter *adapter,
2796 struct kvm_s390_adapter_int *adapter_int)
2797{
2798 unsigned long bit;
2799 int summary_set, idx;
f6547066 2800 struct page *ind_page, *summary_page;
84223598
CH		 2801 void *map;
2802
f6547066
UW		 2803 ind_page = get_map_page(kvm, adapter_int->ind_addr);
2804 if (!ind_page)
84223598 2805 return -1;
f6547066
UW		 2806 summary_page = get_map_page(kvm, adapter_int->summary_addr);
2807 if (!summary_page) {
2808 put_page(ind_page);
84223598
CH		 2809 return -1;
2810 }
f6547066
UW		 2811
2812 idx = srcu_read_lock(&kvm->srcu);
2813 map = page_address(ind_page);
2814 bit = get_ind_bit(adapter_int->ind_addr,
2815 adapter_int->ind_offset, adapter->swap);
2816 set_bit(bit, map);
2817 mark_page_dirty(kvm, adapter_int->ind_addr >> PAGE_SHIFT);
2818 set_page_dirty_lock(ind_page);
2819 map = page_address(summary_page);
2820 bit = get_ind_bit(adapter_int->summary_addr,
2821 adapter_int->summary_offset, adapter->swap);
84223598 2822 summary_set = test_and_set_bit(bit, map);
f6547066
UW		 2823 mark_page_dirty(kvm, adapter_int->summary_addr >> PAGE_SHIFT);
2824 set_page_dirty_lock(summary_page);
84223598 2825 srcu_read_unlock(&kvm->srcu, idx);
f6547066
UW		 2826
2827 put_page(ind_page);
2828 put_page(summary_page);
84223598
CH		 2829 return summary_set ? 0 : 1;
2830}
2831
2832/*
2833 * < 0 - not injected due to error
2834 * = 0 - coalesced, summary indicator already active
2835 * > 0 - injected interrupt
2836 */
2837static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2838 struct kvm *kvm, int irq_source_id, int level,
2839 bool line_status)
2840{
2841 int ret;
2842 struct s390_io_adapter *adapter;
2843
2844 /* We're only interested in the 0->1 transition. */
2845 if (!level)
2846 return 0;
2847 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2848 if (!adapter)
2849 return -1;
84223598 2850 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
84223598 2851 if ((ret > 0) && !adapter->masked) {
a8920950 2852 ret = kvm_s390_inject_airq(kvm, adapter);
84223598
CH		 2853 if (ret == 0)
2854 ret = 1;
2855 }
2856 return ret;
2857}
2858
4d62fcc0
QH		 2859/*
2860 * Inject the machine check to the guest.
2861 */
2862void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
2863 struct mcck_volatile_info *mcck_info)
2864{
2865 struct kvm_s390_interrupt_info inti;
2866 struct kvm_s390_irq irq;
2867 struct kvm_s390_mchk_info *mchk;
2868 union mci mci;
2869 __u64 cr14 = 0; /* upper bits are not used */
3dbf0205 2870 int rc;
4d62fcc0
QH		 2871
2872 mci.val = mcck_info->mcic;
2873 if (mci.sr)
cc65450c 2874 cr14 |= CR14_RECOVERY_SUBMASK;
4d62fcc0 2875 if (mci.dg)
cc65450c 2876 cr14 |= CR14_DEGRADATION_SUBMASK;
4d62fcc0 2877 if (mci.w)
cc65450c 2878 cr14 |= CR14_WARNING_SUBMASK;
4d62fcc0
QH		 2879
2880 mchk = mci.ck ? &inti.mchk : &irq.u.mchk;
2881 mchk->cr14 = cr14;
2882 mchk->mcic = mcck_info->mcic;
2883 mchk->ext_damage_code = mcck_info->ext_damage_code;
2884 mchk->failing_storage_address = mcck_info->failing_storage_address;
2885 if (mci.ck) {
2886 /* Inject the floating machine check */
2887 inti.type = KVM_S390_MCHK;
3dbf0205 2888 rc = __inject_vm(vcpu->kvm, &inti);
4d62fcc0
QH		 2889 } else {
2890 /* Inject the machine check to specified vcpu */
2891 irq.type = KVM_S390_MCHK;
3dbf0205 2892 rc = kvm_s390_inject_vcpu(vcpu, &irq);
4d62fcc0 2893 }
3dbf0205 2894 WARN_ON_ONCE(rc);
4d62fcc0
QH		 2895}
2896
c63cf538
RK		 2897int kvm_set_routing_entry(struct kvm *kvm,
2898 struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 2899 const struct kvm_irq_routing_entry *ue)
2900{
f6547066 2901 u64 uaddr;
84223598
CH		 2902
2903 switch (ue->type) {
f6547066 2904 /* we store the userspace addresses instead of the guest addresses */
84223598
CH		 2905 case KVM_IRQ_ROUTING_S390_ADAPTER:
2906 e->set = set_adapter_int;
f6547066
UW		 2907 uaddr = gmap_translate(kvm->arch.gmap, ue->u.adapter.summary_addr);
2908 if (uaddr == -EFAULT)
2909 return -EFAULT;
2910 e->adapter.summary_addr = uaddr;
2911 uaddr = gmap_translate(kvm->arch.gmap, ue->u.adapter.ind_addr);
2912 if (uaddr == -EFAULT)
2913 return -EFAULT;
2914 e->adapter.ind_addr = uaddr;
84223598
CH		 2915 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2916 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2917 e->adapter.adapter_id = ue->u.adapter.adapter_id;
f6547066 2918 return 0;
84223598 2919 default:
f6547066 2920 return -EINVAL;
84223598 2921 }
84223598
CH		 2922}
2923
2924int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2925 int irq_source_id, int level, bool line_status)
2926{
2927 return -EINVAL;
2928}
816c7667
JF		 2929
2930int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2931{
2932 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2933 struct kvm_s390_irq *buf;
2934 int r = 0;
2935 int n;
2936
2937 buf = vmalloc(len);
2938 if (!buf)
2939 return -ENOMEM;
2940
2941 if (copy_from_user((void *) buf, irqstate, len)) {
2942 r = -EFAULT;
2943 goto out_free;
2944 }
2945
2946 /*
2947 * Don't allow setting the interrupt state
2948 * when there are already interrupts pending
2949 */
2950 spin_lock(&li->lock);
2951 if (li->pending_irqs) {
2952 r = -EBUSY;
2953 goto out_unlock;
2954 }
2955
2956 for (n = 0; n < len / sizeof(*buf); n++) {
2957 r = do_inject_vcpu(vcpu, &buf[n]);
2958 if (r)
2959 break;
2960 }
2961
2962out_unlock:
2963 spin_unlock(&li->lock);
2964out_free:
2965 vfree(buf);
2966
2967 return r;
2968}
2969
2970static void store_local_irq(struct kvm_s390_local_interrupt *li,
2971 struct kvm_s390_irq *irq,
2972 unsigned long irq_type)
2973{
2974 switch (irq_type) {
2975 case IRQ_PEND_MCHK_EX:
2976 case IRQ_PEND_MCHK_REP:
2977 irq->type = KVM_S390_MCHK;
2978 irq->u.mchk = li->irq.mchk;
2979 break;
2980 case IRQ_PEND_PROG:
2981 irq->type = KVM_S390_PROGRAM_INT;
2982 irq->u.pgm = li->irq.pgm;
2983 break;
2984 case IRQ_PEND_PFAULT_INIT:
2985 irq->type = KVM_S390_INT_PFAULT_INIT;
2986 irq->u.ext = li->irq.ext;
2987 break;
2988 case IRQ_PEND_EXT_EXTERNAL:
2989 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2990 irq->u.extcall = li->irq.extcall;
2991 break;
2992 case IRQ_PEND_EXT_CLOCK_COMP:
2993 irq->type = KVM_S390_INT_CLOCK_COMP;
2994 break;
2995 case IRQ_PEND_EXT_CPU_TIMER:
2996 irq->type = KVM_S390_INT_CPU_TIMER;
2997 break;
2998 case IRQ_PEND_SIGP_STOP:
2999 irq->type = KVM_S390_SIGP_STOP;
3000 irq->u.stop = li->irq.stop;
3001 break;
3002 case IRQ_PEND_RESTART:
3003 irq->type = KVM_S390_RESTART;
3004 break;
3005 case IRQ_PEND_SET_PREFIX:
3006 irq->type = KVM_S390_SIGP_SET_PREFIX;
3007 irq->u.prefix = li->irq.prefix;
3008 break;
3009 }
3010}
3011
3012int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
3013{
a5bd7647 3014 int scn;
689bdf9e 3015 DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
816c7667
JF		 3016 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
3017 unsigned long pending_irqs;
3018 struct kvm_s390_irq irq;
3019 unsigned long irq_type;
3020 int cpuaddr;
3021 int n = 0;
3022
3023 spin_lock(&li->lock);
3024 pending_irqs = li->pending_irqs;
3025 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
3026 sizeof(sigp_emerg_pending));
3027 spin_unlock(&li->lock);
3028
3029 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
3030 memset(&irq, 0, sizeof(irq));
3031 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
3032 continue;
3033 if (n + sizeof(irq) > len)
3034 return -ENOBUFS;
3035 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
3036 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
3037 return -EFAULT;
3038 n += sizeof(irq);
3039 }
3040
3041 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
3042 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
3043 memset(&irq, 0, sizeof(irq));
3044 if (n + sizeof(irq) > len)
3045 return -ENOBUFS;
3046 irq.type = KVM_S390_INT_EMERGENCY;
3047 irq.u.emerg.code = cpuaddr;
3048 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
3049 return -EFAULT;
3050 n += sizeof(irq);
3051 }
3052 }
3053
a5bd7647 3054 if (sca_ext_call_pending(vcpu, &scn)) {
816c7667
JF		 3055 if (n + sizeof(irq) > len)
3056 return -ENOBUFS;
3057 memset(&irq, 0, sizeof(irq));
3058 irq.type = KVM_S390_INT_EXTERNAL_CALL;
a5bd7647 3059 irq.u.extcall.code = scn;
816c7667
JF		 3060 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
3061 return -EFAULT;
3062 n += sizeof(irq);
3063 }
3064
3065 return n;
3066}
d7c5cb01 3067
9f30f621
MM		 3068static void __airqs_kick_single_vcpu(struct kvm *kvm, u8 deliverable_mask)
3069{
a3e03bc1 3070 int vcpu_idx, online_vcpus = atomic_read(&kvm->online_vcpus);
9f30f621
MM		 3071 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3072 struct kvm_vcpu *vcpu;
0e9ff65f 3073 u8 vcpu_isc_mask;
9f30f621 3074
a3e03bc1
HP		 3075 for_each_set_bit(vcpu_idx, kvm->arch.idle_mask, online_vcpus) {
3076 vcpu = kvm_get_vcpu(kvm, vcpu_idx);
9f30f621
MM		 3077 if (psw_ioint_disabled(vcpu))
3078 continue;
0e9ff65f
HP		 3079 vcpu_isc_mask = (u8)(vcpu->arch.sie_block->gcr[6] >> 24);
3080 if (deliverable_mask & vcpu_isc_mask) {
9f30f621 3081 /* lately kicked but not yet running */
a3e03bc1 3082 if (test_and_set_bit(vcpu_idx, gi->kicked_mask))
9f30f621
MM		 3083 return;
3084 kvm_s390_vcpu_wakeup(vcpu);
3085 return;
3086 }
3087 }
3088}
3089
3090static enum hrtimer_restart gisa_vcpu_kicker(struct hrtimer *timer)
3091{
3092 struct kvm_s390_gisa_interrupt *gi =
3093 container_of(timer, struct kvm_s390_gisa_interrupt, timer);
3094 struct kvm *kvm =
3095 container_of(gi->origin, struct sie_page2, gisa)->kvm;
3096 u8 pending_mask;
3097
3098 pending_mask = gisa_get_ipm_or_restore_iam(gi);
3099 if (pending_mask) {
3100 __airqs_kick_single_vcpu(kvm, pending_mask);
3101 hrtimer_forward_now(timer, ns_to_ktime(gi->expires));
3102 return HRTIMER_RESTART;
0b545fd1 3103 }
9f30f621
MM		 3104
3105 return HRTIMER_NORESTART;
3106}
3107
3108#define NULL_GISA_ADDR 0x00000000UL
3109#define NONE_GISA_ADDR 0x00000001UL
3110#define GISA_ADDR_MASK 0xfffff000UL
3111
3112static void process_gib_alert_list(void)
3113{
3114 struct kvm_s390_gisa_interrupt *gi;
1abb3269 3115 u32 final, gisa_phys, origin = 0UL;
9f30f621
MM		 3116 struct kvm_s390_gisa *gisa;
3117 struct kvm *kvm;
9f30f621
MM		 3118
3119 do {
3120 /*
3121 * If the NONE_GISA_ADDR is still stored in the alert list
3122 * origin, we will leave the outer loop. No further GISA has
3123 * been added to the alert list by millicode while processing
3124 * the current alert list.
3125 */
3126 final = (origin & NONE_GISA_ADDR);
3127 /*
3128 * Cut off the alert list and store the NONE_GISA_ADDR in the
3129 * alert list origin to avoid further GAL interruptions.
3130 * A new alert list can be build up by millicode in parallel
3131 * for guests not in the yet cut-off alert list. When in the
3132 * final loop, store the NULL_GISA_ADDR instead. This will re-
3133 * enable GAL interruptions on the host again.
3134 */
3135 origin = xchg(&gib->alert_list_origin,
3136 (!final) ? NONE_GISA_ADDR : NULL_GISA_ADDR);
3137 /*
3138 * Loop through the just cut-off alert list and start the
3139 * gisa timers to kick idle vcpus to consume the pending
3140 * interruptions asap.
3141 */
3142 while (origin & GISA_ADDR_MASK) {
1abb3269
NB		 3143 gisa_phys = origin;
3144 gisa = phys_to_virt(gisa_phys);
9f30f621 3145 origin = gisa->next_alert;
1abb3269 3146 gisa->next_alert = gisa_phys;
9f30f621
MM		 3147 kvm = container_of(gisa, struct sie_page2, gisa)->kvm;
3148 gi = &kvm->arch.gisa_int;
3149 if (hrtimer_active(&gi->timer))
3150 hrtimer_cancel(&gi->timer);
3151 hrtimer_start(&gi->timer, 0, HRTIMER_MODE_REL);
3152 }
3153 } while (!final);
3154
3155}
3156
d7c5cb01
MM		 3157void kvm_s390_gisa_clear(struct kvm *kvm)
3158{
982cff42
MM		 3159 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3160
3161 if (!gi->origin)
672128bf 3162 return;
174dd4f8 3163 gisa_clear_ipm(gi->origin);
982cff42 3164 VM_EVENT(kvm, 3, "gisa 0x%pK cleared", gi->origin);
d7c5cb01
MM		 3165}
3166
3167void kvm_s390_gisa_init(struct kvm *kvm)
3168{
982cff42
MM		 3169 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3170
672128bf
MM		 3171 if (!css_general_characteristics.aiv)
3172 return;
982cff42 3173 gi->origin = &kvm->arch.sie_page2->gisa;
6cff2e10
MM		 3174 gi->alert.mask = 0;
3175 spin_lock_init(&gi->alert.ref_lock);
9f30f621
MM		 3176 gi->expires = 50 * 1000; /* 50 usec */
3177 hrtimer_init(&gi->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
3178 gi->timer.function = gisa_vcpu_kicker;
174dd4f8 3179 memset(gi->origin, 0, sizeof(struct kvm_s390_gisa));
2f2c0911 3180 gi->origin->next_alert = (u32)virt_to_phys(gi->origin);
982cff42 3181 VM_EVENT(kvm, 3, "gisa 0x%pK initialized", gi->origin);
d7c5cb01
MM		 3182}
3183
ee6a569d
MM		 3184void kvm_s390_gisa_enable(struct kvm *kvm)
3185{
3186 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3187 struct kvm_vcpu *vcpu;
3188 unsigned long i;
3189 u32 gisa_desc;
3190
3191 if (gi->origin)
3192 return;
3193 kvm_s390_gisa_init(kvm);
3194 gisa_desc = kvm_s390_get_gisa_desc(kvm);
3195 if (!gisa_desc)
3196 return;
3197 kvm_for_each_vcpu(i, vcpu, kvm) {
3198 mutex_lock(&vcpu->mutex);
3199 vcpu->arch.sie_block->gd = gisa_desc;
3200 vcpu->arch.sie_block->eca |= ECA_AIV;
3201 VCPU_EVENT(vcpu, 3, "AIV gisa format-%u enabled for cpu %03u",
3202 vcpu->arch.sie_block->gd & 0x3, vcpu->vcpu_id);
3203 mutex_unlock(&vcpu->mutex);
3204 }
3205}
3206
d7c5cb01
MM		 3207void kvm_s390_gisa_destroy(struct kvm *kvm)
3208{
9f30f621 3209 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
ee6a569d 3210 struct kvm_s390_gisa *gisa = gi->origin;
9f30f621
MM		 3211
3212 if (!gi->origin)
3213 return;
f87ef572
MM		 3214 WARN(gi->alert.mask != 0x00,
3215 "unexpected non zero alert.mask 0x%02x",
3216 gi->alert.mask);
3217 gi->alert.mask = 0x00;
3218 if (gisa_set_iam(gi->origin, gi->alert.mask))
3219 process_gib_alert_list();
9f30f621
MM		 3220 hrtimer_cancel(&gi->timer);
3221 gi->origin = NULL;
ee6a569d
MM		 3222 VM_EVENT(kvm, 3, "gisa 0x%pK destroyed", gisa);
3223}
3224
3225void kvm_s390_gisa_disable(struct kvm *kvm)
3226{
3227 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3228 struct kvm_vcpu *vcpu;
3229 unsigned long i;
3230
3231 if (!gi->origin)
3232 return;
3233 kvm_for_each_vcpu(i, vcpu, kvm) {
3234 mutex_lock(&vcpu->mutex);
3235 vcpu->arch.sie_block->eca &= ~ECA_AIV;
3236 vcpu->arch.sie_block->gd = 0U;
3237 mutex_unlock(&vcpu->mutex);
3238 VCPU_EVENT(vcpu, 3, "AIV disabled for cpu %03u", vcpu->vcpu_id);
3239 }
3240 kvm_s390_gisa_destroy(kvm);
d7c5cb01 3241}
1282c21e 3242
6cff2e10
MM		 3243/**
3244 * kvm_s390_gisc_register - register a guest ISC
3245 *
3246 * @kvm: the kernel vm to work with
3247 * @gisc: the guest interruption sub class to register
3248 *
3249 * The function extends the vm specific alert mask to use.
3250 * The effective IAM mask in the GISA is updated as well
3251 * in case the GISA is not part of the GIB alert list.
3252 * It will be updated latest when the IAM gets restored
3253 * by gisa_get_ipm_or_restore_iam().
3254 *
3255 * Returns: the nonspecific ISC (NISC) the gib alert mechanism
3256 * has registered with the channel subsystem.
3257 * -ENODEV in case the vm uses no GISA
3258 * -ERANGE in case the guest ISC is invalid
3259 */
3260int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc)
3261{
3262 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3263
3264 if (!gi->origin)
3265 return -ENODEV;
3266 if (gisc > MAX_ISC)
3267 return -ERANGE;
3268
3269 spin_lock(&gi->alert.ref_lock);
3270 gi->alert.ref_count[gisc]++;
3271 if (gi->alert.ref_count[gisc] == 1) {
3272 gi->alert.mask |= 0x80 >> gisc;
3273 gisa_set_iam(gi->origin, gi->alert.mask);
3274 }
3275 spin_unlock(&gi->alert.ref_lock);
3276
3277 return gib->nisc;
3278}
3279EXPORT_SYMBOL_GPL(kvm_s390_gisc_register);
3280
3281/**
3282 * kvm_s390_gisc_unregister - unregister a guest ISC
3283 *
3284 * @kvm: the kernel vm to work with
3285 * @gisc: the guest interruption sub class to register
3286 *
3287 * The function reduces the vm specific alert mask to use.
3288 * The effective IAM mask in the GISA is updated as well
3289 * in case the GISA is not part of the GIB alert list.
3290 * It will be updated latest when the IAM gets restored
3291 * by gisa_get_ipm_or_restore_iam().
3292 *
3293 * Returns: the nonspecific ISC (NISC) the gib alert mechanism
3294 * has registered with the channel subsystem.
3295 * -ENODEV in case the vm uses no GISA
3296 * -ERANGE in case the guest ISC is invalid
3297 * -EINVAL in case the guest ISC is not registered
3298 */
3299int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc)
3300{
3301 struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
3302 int rc = 0;
3303
3304 if (!gi->origin)
3305 return -ENODEV;
3306 if (gisc > MAX_ISC)
3307 return -ERANGE;
3308
3309 spin_lock(&gi->alert.ref_lock);
3310 if (gi->alert.ref_count[gisc] == 0) {
3311 rc = -EINVAL;
3312 goto out;
3313 }
3314 gi->alert.ref_count[gisc]--;
3315 if (gi->alert.ref_count[gisc] == 0) {
3316 gi->alert.mask &= ~(0x80 >> gisc);
3317 gisa_set_iam(gi->origin, gi->alert.mask);
3318 }
3319out:
3320 spin_unlock(&gi->alert.ref_lock);
3321
3322 return rc;
3323}
3324EXPORT_SYMBOL_GPL(kvm_s390_gisc_unregister);
3325
73f91b00
MR		 3326static void aen_host_forward(unsigned long si)
3327{
3328 struct kvm_s390_gisa_interrupt *gi;
3329 struct zpci_gaite *gaite;
3330 struct kvm *kvm;
3331
3332 gaite = (struct zpci_gaite *)aift->gait +
3333 (si * sizeof(struct zpci_gaite));
3334 if (gaite->count == 0)
3335 return;
3336 if (gaite->aisb != 0)
70ba8fae 3337 set_bit_inv(gaite->aisbo, phys_to_virt(gaite->aisb));
73f91b00
MR		 3338
3339 kvm = kvm_s390_pci_si_to_kvm(aift, si);
3340 if (!kvm)
3341 return;
3342 gi = &kvm->arch.gisa_int;
3343
3344 if (!(gi->origin->g1.simm & AIS_MODE_MASK(gaite->gisc)) ||
3345 !(gi->origin->g1.nimm & AIS_MODE_MASK(gaite->gisc))) {
3346 gisa_set_ipm_gisc(gi->origin, gaite->gisc);
3347 if (hrtimer_active(&gi->timer))
3348 hrtimer_cancel(&gi->timer);
3349 hrtimer_start(&gi->timer, 0, HRTIMER_MODE_REL);
3350 kvm->stat.aen_forward++;
3351 }
3352}
3353
3354static void aen_process_gait(u8 isc)
3355{
3356 bool found = false, first = true;
3357 union zpci_sic_iib iib = {{0}};
3358 unsigned long si, flags;
3359
3360 spin_lock_irqsave(&aift->gait_lock, flags);
3361
3362 if (!aift->gait) {
3363 spin_unlock_irqrestore(&aift->gait_lock, flags);
3364 return;
3365 }
3366
3367 for (si = 0;;) {
3368 /* Scan adapter summary indicator bit vector */
3369 si = airq_iv_scan(aift->sbv, si, airq_iv_end(aift->sbv));
3370 if (si == -1UL) {
3371 if (first || found) {
3372 /* Re-enable interrupts. */
3373 zpci_set_irq_ctrl(SIC_IRQ_MODE_SINGLE, isc,
3374 &iib);
3375 first = found = false;
3376 } else {
3377 /* Interrupts on and all bits processed */
3378 break;
3379 }
3380 found = false;
3381 si = 0;
3382 /* Scan again after re-enabling interrupts */
3383 continue;
3384 }
3385 found = true;
3386 aen_host_forward(si);
3387 }
3388
3389 spin_unlock_irqrestore(&aift->gait_lock, flags);
3390}
3391
d2197485
MR		 3392static void gib_alert_irq_handler(struct airq_struct *airq,
3393 struct tpi_info *tpi_info)
9f30f621 3394{
73f91b00
MR		 3395 struct tpi_adapter_info *info = (struct tpi_adapter_info *)tpi_info;
3396
9f30f621 3397 inc_irq_stat(IRQIO_GAL);
73f91b00
MR		 3398
3399 if ((info->forward || info->error) &&
3400 IS_ENABLED(CONFIG_VFIO_PCI_ZDEV_KVM)) {
3401 aen_process_gait(info->isc);
3402 if (info->aism != 0)
3403 process_gib_alert_list();
3404 } else {
3405 process_gib_alert_list();
3406 }
9f30f621
MM		 3407}
3408
3409static struct airq_struct gib_alert_irq = {
3410 .handler = gib_alert_irq_handler,
9f30f621
MM		 3411};
3412
1282c21e
MM		 3413void kvm_s390_gib_destroy(void)
3414{
3415 if (!gib)
3416 return;
98b1d33d
MR		 3417 if (kvm_s390_pci_interp_allowed() && aift) {
3418 mutex_lock(&aift->aift_lock);
3419 kvm_s390_pci_aen_exit();
3420 mutex_unlock(&aift->aift_lock);
3421 }
1282c21e 3422 chsc_sgib(0);
9f30f621 3423 unregister_adapter_interrupt(&gib_alert_irq);
1282c21e
MM		 3424 free_page((unsigned long)gib);
3425 gib = NULL;
3426}
3427
6c30cd2e 3428int __init kvm_s390_gib_init(u8 nisc)
1282c21e 3429{
1abb3269 3430 u32 gib_origin;
1282c21e
MM		 3431 int rc = 0;
3432
3433 if (!css_general_characteristics.aiv) {
3434 KVM_EVENT(3, "%s", "gib not initialized, no AIV facility");
3435 goto out;
3436 }
3437
c4196218 3438 gib = (struct kvm_s390_gib *)get_zeroed_page(GFP_KERNEL_ACCOUNT | GFP_DMA);
1282c21e
MM		 3439 if (!gib) {
3440 rc = -ENOMEM;
3441 goto out;
3442 }
3443
9f30f621
MM		 3444 gib_alert_irq.isc = nisc;
3445 if (register_adapter_interrupt(&gib_alert_irq)) {
3446 pr_err("Registering the GIB alert interruption handler failed\n");
3447 rc = -EIO;
3448 goto out_free_gib;
3449 }
acf00b5e
BB		 3450 /* adapter interrupts used for AP (applicable here) don't use the LSI */
3451 *gib_alert_irq.lsi_ptr = 0xff;
9f30f621 3452
1282c21e 3453 gib->nisc = nisc;
1abb3269
NB		 3454 gib_origin = virt_to_phys(gib);
3455 if (chsc_sgib(gib_origin)) {
1282c21e
MM		 3456 pr_err("Associating the GIB with the AIV facility failed\n");
3457 free_page((unsigned long)gib);
3458 gib = NULL;
3459 rc = -EIO;
9f30f621 3460 goto out_unreg_gal;
1282c21e
MM		 3461 }
3462
98b1d33d
MR		 3463 if (kvm_s390_pci_interp_allowed()) {
3464 if (kvm_s390_pci_aen_init(nisc)) {
3465 pr_err("Initializing AEN for PCI failed\n");
3466 rc = -EIO;
3467 goto out_unreg_gal;
3468 }
3469 }
3470
1282c21e 3471 KVM_EVENT(3, "gib 0x%pK (nisc=%d) initialized", gib, gib->nisc);
9f30f621
MM		 3472 goto out;
3473
3474out_unreg_gal:
3475 unregister_adapter_interrupt(&gib_alert_irq);
3476out_free_gib:
3477 free_page((unsigned long)gib);
3478 gib = NULL;
1282c21e
MM		 3479out:
3480 return rc;
3481}
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git