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