projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'mailbox-v4.18' of git://git.linaro.org/landing-teams/working/fujitsu/integ...
[linux-2.6-block.git] / arch / s390 / kvm / interrupt.c
CommitLineData
d809aa23 1// SPDX-License-Identifier: GPL-2.0
ba5c1e9b 2/*
a53c8fab 3 * handling kvm guest interrupts
ba5c1e9b 4 *
33b412ac 5 * Copyright IBM Corp. 2008, 2015
ba5c1e9b 6 *
ba5c1e9b
CO		 7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 */
9
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) ||
162 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
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
175 if (vcpu->arch.sie_block->gcr[0] & 0x0020000000000000ul) {
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) &&
187 (vcpu->arch.sie_block->gcr[0] & 0x400ul);
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
220static inline void kvm_s390_gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
221{
222 set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
223}
224
225static inline u8 kvm_s390_gisa_get_ipm(struct kvm_s390_gisa *gisa)
226{
227 return READ_ONCE(gisa->ipm);
228}
229
230static inline void kvm_s390_gisa_clear_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
231{
232 clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
233}
234
235static inline int kvm_s390_gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc)
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) |
d7c5cb01 249 kvm_s390_gisa_get_ipm(vcpu->kvm->arch.gisa) << IRQ_PEND_IO_ISC_7;
383d0b05
JF		 250}
251
ee739f4b
MM		 252static inline int isc_to_irq_type(unsigned long isc)
253{
c7901a6e 254 return IRQ_PEND_IO_ISC_0 - isc;
ee739f4b
MM		 255}
256
257static inline int irq_type_to_isc(unsigned long irq_type)
258{
c7901a6e 259 return IRQ_PEND_IO_ISC_0 - irq_type;
ee739f4b
MM		 260}
261
6d3da241
JF		 262static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
263 unsigned long active_mask)
264{
265 int i;
266
267 for (i = 0; i <= MAX_ISC; i++)
268 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
ee739f4b 269 active_mask &= ~(1UL << (isc_to_irq_type(i)));
6d3da241
JF		 270
271 return active_mask;
272}
273
274static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
383d0b05 275{
6d3da241
JF		 276 unsigned long active_mask;
277
5f94c58e 278 active_mask = pending_irqs(vcpu);
ffeca0ae
JF		 279 if (!active_mask)
280 return 0;
383d0b05
JF		 281
282 if (psw_extint_disabled(vcpu))
283 active_mask &= ~IRQ_PEND_EXT_MASK;
6d3da241
JF		 284 if (psw_ioint_disabled(vcpu))
285 active_mask &= ~IRQ_PEND_IO_MASK;
286 else
287 active_mask = disable_iscs(vcpu, active_mask);
383d0b05
JF		 288 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
289 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
290 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
291 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
292 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
293 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
294 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
295 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
6d3da241
JF		 296 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
297 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
383d0b05
JF		 298 if (psw_mchk_disabled(vcpu))
299 active_mask &= ~IRQ_PEND_MCHK_MASK;
4d62fcc0
QH		 300 /*
301 * Check both floating and local interrupt's cr14 because
302 * bit IRQ_PEND_MCHK_REP could be set in both cases.
303 */
6d3da241 304 if (!(vcpu->arch.sie_block->gcr[14] &
4d62fcc0
QH		 305 (vcpu->kvm->arch.float_int.mchk.cr14 |
306 vcpu->arch.local_int.irq.mchk.cr14)))
6d3da241 307 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
383d0b05 308
6cddd432
DH		 309 /*
310 * STOP irqs will never be actively delivered. They are triggered via
311 * intercept requests and cleared when the stop intercept is performed.
312 */
313 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
314
383d0b05
JF		 315 return active_mask;
316}
317
ba5c1e9b
CO		 318static void __set_cpu_idle(struct kvm_vcpu *vcpu)
319{
ef8f4f49 320 kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT);
a9f6c9a9 321 set_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
ba5c1e9b
CO		 322}
323
324static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
325{
9daecfc6 326 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT);
a9f6c9a9 327 clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
ba5c1e9b
CO		 328}
329
330static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
331{
9daecfc6
DH		 332 kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IO_INT | CPUSTAT_EXT_INT |
333 CPUSTAT_STOP_INT);
ba5c1e9b 334 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 335 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
336
337 if (guestdbg_enabled(vcpu)) {
338 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
339 LCTL_CR10 | LCTL_CR11);
340 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
341 }
ba5c1e9b
CO		 342}
343
6d3da241
JF		 344static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
345{
8846f317 346 if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK))
6d3da241
JF		 347 return;
348 else if (psw_ioint_disabled(vcpu))
2018224d 349 kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT);
6d3da241
JF		 350 else
351 vcpu->arch.sie_block->lctl |= LCTL_CR6;
352}
353
383d0b05
JF		 354static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
355{
5f94c58e 356 if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
383d0b05
JF		 357 return;
358 if (psw_extint_disabled(vcpu))
2018224d 359 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
383d0b05
JF		 360 else
361 vcpu->arch.sie_block->lctl |= LCTL_CR0;
362}
363
364static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
365{
5f94c58e 366 if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
383d0b05
JF		 367 return;
368 if (psw_mchk_disabled(vcpu))
369 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
370 else
371 vcpu->arch.sie_block->lctl |= LCTL_CR14;
372}
373
6cddd432
DH		 374static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
375{
376 if (kvm_s390_is_stop_irq_pending(vcpu))
2018224d 377 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
6cddd432
DH		 378}
379
6d3da241
JF		 380/* Set interception request for non-deliverable interrupts */
381static void set_intercept_indicators(struct kvm_vcpu *vcpu)
383d0b05 382{
6d3da241 383 set_intercept_indicators_io(vcpu);
383d0b05
JF		 384 set_intercept_indicators_ext(vcpu);
385 set_intercept_indicators_mchk(vcpu);
6cddd432 386 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 387}
388
0fb97abe
JF		 389static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
390{
383d0b05 391 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 392 int rc;
393
ccc40c53 394 vcpu->stat.deliver_cputm++;
0fb97abe
JF		 395 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
396 0, 0);
397
398 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
399 (u16 *)__LC_EXT_INT_CODE);
467fc298 400 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 401 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
402 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
403 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
404 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 405 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 406 return rc ? -EFAULT : 0;
0fb97abe
JF		 407}
408
409static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
410{
383d0b05 411 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 412 int rc;
413
ccc40c53 414 vcpu->stat.deliver_ckc++;
0fb97abe
JF		 415 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
416 0, 0);
417
418 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
419 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 420 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 421 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
422 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
423 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
424 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 425 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 426 return rc ? -EFAULT : 0;
0fb97abe
JF		 427}
428
383d0b05 429static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 430{
383d0b05
JF		 431 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
432 struct kvm_s390_ext_info ext;
0fb97abe
JF		 433 int rc;
434
383d0b05
JF		 435 spin_lock(&li->lock);
436 ext = li->irq.ext;
437 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
438 li->irq.ext.ext_params2 = 0;
439 spin_unlock(&li->lock);
440
3f24ba15
CB		 441 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
442 ext.ext_params2);
0fb97abe
JF		 443 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
444 KVM_S390_INT_PFAULT_INIT,
383d0b05 445 0, ext.ext_params2);
0fb97abe
JF		 446
447 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
448 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
449 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
450 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
451 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
452 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 453 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 454 return rc ? -EFAULT : 0;
0fb97abe
JF		 455}
456
d6404ded
DH		 457static int __write_machine_check(struct kvm_vcpu *vcpu,
458 struct kvm_s390_mchk_info *mchk)
459{
460 unsigned long ext_sa_addr;
4e0b1ab7 461 unsigned long lc;
0319dae6 462 freg_t fprs[NUM_FPRS];
ff5dc149 463 union mci mci;
d6404ded
DH		 464 int rc;
465
ff5dc149 466 mci.val = mchk->mcic;
31d8b8d4 467 /* take care of lazy register loading */
0319dae6
DH		 468 save_fpu_regs();
469 save_access_regs(vcpu->run->s.regs.acrs);
80248559
CB		 470 if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
471 save_gs_cb(current->thread.gs_cb);
0319dae6 472
d6404ded 473 /* Extended save area */
916cda1a
MS		 474 rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,
475 sizeof(unsigned long));
4e0b1ab7
FZ		 476 /* Only bits 0 through 63-LC are used for address formation */
477 lc = ext_sa_addr & MCESA_LC_MASK;
478 if (test_kvm_facility(vcpu->kvm, 133)) {
479 switch (lc) {
480 case 0:
481 case 10:
482 ext_sa_addr &= ~0x3ffUL;
483 break;
484 case 11:
485 ext_sa_addr &= ~0x7ffUL;
486 break;
487 case 12:
488 ext_sa_addr &= ~0xfffUL;
489 break;
490 default:
491 ext_sa_addr = 0;
492 break;
493 }
494 } else {
495 ext_sa_addr &= ~0x3ffUL;
496 }
497
ff5dc149
DH		 498 if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
499 if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
500 512))
501 mci.vr = 0;
502 } else {
503 mci.vr = 0;
504 }
4e0b1ab7
FZ		 505 if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133)
506 && (lc == 11 || lc == 12)) {
507 if (write_guest_abs(vcpu, ext_sa_addr + 1024,
508 &vcpu->run->s.regs.gscb, 32))
509 mci.gs = 0;
510 } else {
511 mci.gs = 0;
512 }
d6404ded
DH		 513
514 /* General interruption information */
0319dae6 515 rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
d6404ded
DH		 516 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
517 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
518 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
519 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ff5dc149 520 rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);
d6404ded
DH		 521
522 /* Register-save areas */
0319dae6
DH		 523 if (MACHINE_HAS_VX) {
524 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
525 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
526 } else {
527 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA,
528 vcpu->run->s.regs.fprs, 128);
529 }
530 rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA,
531 vcpu->run->s.regs.gprs, 128);
532 rc |= put_guest_lc(vcpu, current->thread.fpu.fpc,
533 (u32 __user *) __LC_FP_CREG_SAVE_AREA);
534 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr,
535 (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA);
536 rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu),
537 (u64 __user *) __LC_CPU_TIMER_SAVE_AREA);
538 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8,
539 (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA);
540 rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA,
541 &vcpu->run->s.regs.acrs, 64);
542 rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA,
543 &vcpu->arch.sie_block->gcr, 128);
d6404ded
DH		 544
545 /* Extended interruption information */
8953fb08
DH		 546 rc |= put_guest_lc(vcpu, mchk->ext_damage_code,
547 (u32 __user *) __LC_EXT_DAMAGE_CODE);
d6404ded
DH		 548 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
549 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
550 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout,
551 sizeof(mchk->fixed_logout));
552 return rc ? -EFAULT : 0;
553}
554
383d0b05 555static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 556{
6d3da241 557 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
383d0b05 558 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
6d3da241 559 struct kvm_s390_mchk_info mchk = {};
6d3da241
JF		 560 int deliver = 0;
561 int rc = 0;
0fb97abe 562
6d3da241 563 spin_lock(&fi->lock);
383d0b05 564 spin_lock(&li->lock);
6d3da241
JF		 565 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
566 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
567 /*
568 * If there was an exigent machine check pending, then any
569 * repressible machine checks that might have been pending
570 * are indicated along with it, so always clear bits for
571 * repressible and exigent interrupts
572 */
573 mchk = li->irq.mchk;
574 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
575 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
576 memset(&li->irq.mchk, 0, sizeof(mchk));
577 deliver = 1;
578 }
383d0b05 579 /*
6d3da241
JF		 580 * We indicate floating repressible conditions along with
581 * other pending conditions. Channel Report Pending and Channel
582 * Subsystem damage are the only two and and are indicated by
583 * bits in mcic and masked in cr14.
383d0b05 584 */
6d3da241
JF		 585 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
586 mchk.mcic |= fi->mchk.mcic;
587 mchk.cr14 |= fi->mchk.cr14;
588 memset(&fi->mchk, 0, sizeof(mchk));
589 deliver = 1;
590 }
383d0b05 591 spin_unlock(&li->lock);
6d3da241 592 spin_unlock(&fi->lock);
383d0b05 593
6d3da241 594 if (deliver) {
3f24ba15 595 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
6d3da241
JF		 596 mchk.mcic);
597 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
598 KVM_S390_MCHK,
599 mchk.cr14, mchk.mcic);
32de0749 600 vcpu->stat.deliver_machine_check++;
d6404ded 601 rc = __write_machine_check(vcpu, &mchk);
6d3da241 602 }
d6404ded 603 return rc;
0fb97abe
JF		 604}
605
606static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
607{
383d0b05 608 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 609 int rc;
610
3f24ba15 611 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
0fb97abe
JF		 612 vcpu->stat.deliver_restart_signal++;
613 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
614
615 rc = write_guest_lc(vcpu,
c667aeac 616 offsetof(struct lowcore, restart_old_psw),
0fb97abe 617 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
c667aeac 618 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw),
0fb97abe 619 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 620 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 621 return rc ? -EFAULT : 0;
0fb97abe
JF		 622}
623
383d0b05 624static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 625{
383d0b05
JF		 626 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
627 struct kvm_s390_prefix_info prefix;
628
629 spin_lock(&li->lock);
630 prefix = li->irq.prefix;
631 li->irq.prefix.address = 0;
632 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
633 spin_unlock(&li->lock);
0fb97abe 634
0fb97abe
JF		 635 vcpu->stat.deliver_prefix_signal++;
636 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
637 KVM_S390_SIGP_SET_PREFIX,
383d0b05 638 prefix.address, 0);
0fb97abe 639
383d0b05 640 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 641 return 0;
642}
643
383d0b05 644static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 645{
383d0b05 646 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 647 int rc;
383d0b05
JF		 648 int cpu_addr;
649
650 spin_lock(&li->lock);
651 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
652 clear_bit(cpu_addr, li->sigp_emerg_pending);
653 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
654 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
655 spin_unlock(&li->lock);
0fb97abe 656
3f24ba15 657 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
0fb97abe 658 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 659 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
660 cpu_addr, 0);
0fb97abe
JF		 661
662 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
663 (u16 *)__LC_EXT_INT_CODE);
383d0b05 664 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 665 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
666 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
667 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
668 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 669 return rc ? -EFAULT : 0;
0fb97abe
JF		 670}
671
383d0b05 672static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 673{
383d0b05
JF		 674 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
675 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 676 int rc;
677
383d0b05
JF		 678 spin_lock(&li->lock);
679 extcall = li->irq.extcall;
680 li->irq.extcall.code = 0;
681 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
682 spin_unlock(&li->lock);
683
3f24ba15 684 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
0fb97abe
JF		 685 vcpu->stat.deliver_external_call++;
686 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
687 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 688 extcall.code, 0);
0fb97abe
JF		 689
690 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
691 (u16 *)__LC_EXT_INT_CODE);
383d0b05 692 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 693 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
694 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
695 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
696 sizeof(psw_t));
99e20009 697 return rc ? -EFAULT : 0;
0fb97abe
JF		 698}
699
383d0b05 700static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 701{
383d0b05
JF		 702 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
703 struct kvm_s390_pgm_info pgm_info;
a9a846fd 704 int rc = 0, nullifying = false;
634790b8 705 u16 ilen;
8712836b 706
383d0b05
JF		 707 spin_lock(&li->lock);
708 pgm_info = li->irq.pgm;
709 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
710 memset(&li->irq.pgm, 0, sizeof(pgm_info));
711 spin_unlock(&li->lock);
712
634790b8 713 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
0e8bc06a
DH		 714 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
715 pgm_info.code, ilen);
ccc40c53 716 vcpu->stat.deliver_program++;
0fb97abe 717 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 718 pgm_info.code, 0);
0fb97abe 719
383d0b05 720 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 721 case PGM_AFX_TRANSLATION:
722 case PGM_ASX_TRANSLATION:
723 case PGM_EX_TRANSLATION:
724 case PGM_LFX_TRANSLATION:
725 case PGM_LSTE_SEQUENCE:
726 case PGM_LSX_TRANSLATION:
727 case PGM_LX_TRANSLATION:
728 case PGM_PRIMARY_AUTHORITY:
729 case PGM_SECONDARY_AUTHORITY:
a9a846fd
TH		 730 nullifying = true;
731 /* fall through */
8712836b 732 case PGM_SPACE_SWITCH:
383d0b05 733 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 734 (u64 *)__LC_TRANS_EXC_CODE);
735 break;
736 case PGM_ALEN_TRANSLATION:
737 case PGM_ALE_SEQUENCE:
738 case PGM_ASTE_INSTANCE:
739 case PGM_ASTE_SEQUENCE:
740 case PGM_ASTE_VALIDITY:
741 case PGM_EXTENDED_AUTHORITY:
383d0b05 742 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 743 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 744 nullifying = true;
8712836b
DH		 745 break;
746 case PGM_ASCE_TYPE:
747 case PGM_PAGE_TRANSLATION:
748 case PGM_REGION_FIRST_TRANS:
749 case PGM_REGION_SECOND_TRANS:
750 case PGM_REGION_THIRD_TRANS:
751 case PGM_SEGMENT_TRANSLATION:
383d0b05 752 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 753 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 754 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 755 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 756 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 757 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 758 nullifying = true;
8712836b
DH		 759 break;
760 case PGM_MONITOR:
383d0b05 761 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 762 (u16 *)__LC_MON_CLASS_NR);
383d0b05 763 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 764 (u64 *)__LC_MON_CODE);
765 break;
403c8648 766 case PGM_VECTOR_PROCESSING:
8712836b 767 case PGM_DATA:
383d0b05 768 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 769 (u32 *)__LC_DATA_EXC_CODE);
770 break;
771 case PGM_PROTECTION:
383d0b05 772 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 773 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 774 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 775 (u8 *)__LC_EXC_ACCESS_ID);
776 break;
a9a846fd
TH		 777 case PGM_STACK_FULL:
778 case PGM_STACK_EMPTY:
779 case PGM_STACK_SPECIFICATION:
780 case PGM_STACK_TYPE:
781 case PGM_STACK_OPERATION:
782 case PGM_TRACE_TABEL:
783 case PGM_CRYPTO_OPERATION:
784 nullifying = true;
785 break;
8712836b
DH		 786 }
787
383d0b05
JF		 788 if (pgm_info.code & PGM_PER) {
789 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 790 (u8 *) __LC_PER_CODE);
383d0b05 791 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 792 (u8 *)__LC_PER_ATMID);
383d0b05 793 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 794 (u64 *) __LC_PER_ADDRESS);
383d0b05 795 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 796 (u8 *) __LC_PER_ACCESS_ID);
797 }
798
eaa4f416 799 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND))
0e8bc06a 800 kvm_s390_rewind_psw(vcpu, ilen);
a9a846fd 801
0e8bc06a
DH		 802 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
803 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
2ba45968
DH		 804 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
805 (u64 *) __LC_LAST_BREAK);
383d0b05 806 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 807 (u16 *)__LC_PGM_INT_CODE);
808 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
809 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
810 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
811 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 812 return rc ? -EFAULT : 0;
0fb97abe
JF		 813}
814
6d3da241 815static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
0fb97abe 816{
6d3da241
JF		 817 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
818 struct kvm_s390_ext_info ext;
819 int rc = 0;
820
821 spin_lock(&fi->lock);
822 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
823 spin_unlock(&fi->lock);
824 return 0;
825 }
826 ext = fi->srv_signal;
827 memset(&fi->srv_signal, 0, sizeof(ext));
828 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
829 spin_unlock(&fi->lock);
0fb97abe 830
3f24ba15 831 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
6d3da241 832 ext.ext_params);
0fb97abe 833 vcpu->stat.deliver_service_signal++;
6d3da241
JF		 834 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
835 ext.ext_params, 0);
0fb97abe
JF		 836
837 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 838 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 839 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
840 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
841 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
842 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
6d3da241 843 rc |= put_guest_lc(vcpu, ext.ext_params,
0fb97abe 844 (u32 *)__LC_EXT_PARAMS);
6d3da241 845
99e20009 846 return rc ? -EFAULT : 0;
0fb97abe
JF		 847}
848
6d3da241 849static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
0fb97abe 850{
6d3da241
JF		 851 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
852 struct kvm_s390_interrupt_info *inti;
853 int rc = 0;
0fb97abe 854
6d3da241
JF		 855 spin_lock(&fi->lock);
856 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
857 struct kvm_s390_interrupt_info,
858 list);
859 if (inti) {
6d3da241
JF		 860 list_del(&inti->list);
861 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
862 }
863 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
864 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
865 spin_unlock(&fi->lock);
8712836b 866
6d3da241 867 if (inti) {
3f24ba15
CB		 868 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
869 KVM_S390_INT_PFAULT_DONE, 0,
870 inti->ext.ext_params2);
871 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
872 inti->ext.ext_params2);
873
6d3da241
JF		 874 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
875 (u16 *)__LC_EXT_INT_CODE);
876 rc |= put_guest_lc(vcpu, PFAULT_DONE,
877 (u16 *)__LC_EXT_CPU_ADDR);
878 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
879 &vcpu->arch.sie_block->gpsw,
880 sizeof(psw_t));
881 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
882 &vcpu->arch.sie_block->gpsw,
883 sizeof(psw_t));
884 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
885 (u64 *)__LC_EXT_PARAMS2);
886 kfree(inti);
887 }
99e20009 888 return rc ? -EFAULT : 0;
0fb97abe
JF		 889}
890
6d3da241 891static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
0fb97abe 892{
6d3da241
JF		 893 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
894 struct kvm_s390_interrupt_info *inti;
895 int rc = 0;
0fb97abe 896
6d3da241
JF		 897 spin_lock(&fi->lock);
898 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
899 struct kvm_s390_interrupt_info,
900 list);
901 if (inti) {
902 VCPU_EVENT(vcpu, 4,
3f24ba15 903 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
6d3da241 904 inti->ext.ext_params, inti->ext.ext_params2);
ccc40c53 905 vcpu->stat.deliver_virtio++;
6d3da241
JF		 906 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
907 inti->type,
908 inti->ext.ext_params,
909 inti->ext.ext_params2);
910 list_del(&inti->list);
911 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
912 }
913 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
914 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
915 spin_unlock(&fi->lock);
0fb97abe 916
6d3da241
JF		 917 if (inti) {
918 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
919 (u16 *)__LC_EXT_INT_CODE);
920 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
921 (u16 *)__LC_EXT_CPU_ADDR);
922 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
923 &vcpu->arch.sie_block->gpsw,
924 sizeof(psw_t));
925 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
926 &vcpu->arch.sie_block->gpsw,
927 sizeof(psw_t));
928 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
929 (u32 *)__LC_EXT_PARAMS);
930 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
931 (u64 *)__LC_EXT_PARAMS2);
932 kfree(inti);
933 }
99e20009 934 return rc ? -EFAULT : 0;
0fb97abe
JF		 935}
936
d7c5cb01
MM		 937static int __do_deliver_io(struct kvm_vcpu *vcpu, struct kvm_s390_io_info *io)
938{
939 int rc;
940
941 rc = put_guest_lc(vcpu, io->subchannel_id, (u16 *)__LC_SUBCHANNEL_ID);
942 rc |= put_guest_lc(vcpu, io->subchannel_nr, (u16 *)__LC_SUBCHANNEL_NR);
943 rc |= put_guest_lc(vcpu, io->io_int_parm, (u32 *)__LC_IO_INT_PARM);
944 rc |= put_guest_lc(vcpu, io->io_int_word, (u32 *)__LC_IO_INT_WORD);
945 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
946 &vcpu->arch.sie_block->gpsw,
947 sizeof(psw_t));
948 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
949 &vcpu->arch.sie_block->gpsw,
950 sizeof(psw_t));
951 return rc ? -EFAULT : 0;
952}
953
0fb97abe 954static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
6d3da241 955 unsigned long irq_type)
0fb97abe 956{
6d3da241
JF		 957 struct list_head *isc_list;
958 struct kvm_s390_float_interrupt *fi;
959 struct kvm_s390_interrupt_info *inti = NULL;
d7c5cb01
MM		 960 struct kvm_s390_io_info io;
961 u32 isc;
6d3da241 962 int rc = 0;
0fb97abe 963
6d3da241 964 fi = &vcpu->kvm->arch.float_int;
8712836b 965
6d3da241 966 spin_lock(&fi->lock);
d7c5cb01
MM		 967 isc = irq_type_to_isc(irq_type);
968 isc_list = &fi->lists[isc];
6d3da241
JF		 969 inti = list_first_entry_or_null(isc_list,
970 struct kvm_s390_interrupt_info,
971 list);
972 if (inti) {
dcc98ea6
CB		 973 if (inti->type & KVM_S390_INT_IO_AI_MASK)
974 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)");
975 else
976 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x",
977 inti->io.subchannel_id >> 8,
978 inti->io.subchannel_id >> 1 & 0x3,
979 inti->io.subchannel_nr);
980
ccc40c53 981 vcpu->stat.deliver_io++;
6d3da241
JF		 982 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
983 inti->type,
984 ((__u32)inti->io.subchannel_id << 16) |
985 inti->io.subchannel_nr,
986 ((__u64)inti->io.io_int_parm << 32) |
987 inti->io.io_int_word);
988 list_del(&inti->list);
989 fi->counters[FIRQ_CNTR_IO] -= 1;
990 }
991 if (list_empty(isc_list))
992 clear_bit(irq_type, &fi->pending_irqs);
993 spin_unlock(&fi->lock);
994
995 if (inti) {
d7c5cb01 996 rc = __do_deliver_io(vcpu, &(inti->io));
6d3da241 997 kfree(inti);
d7c5cb01 998 goto out;
6d3da241 999 }
383d0b05 1000
d7c5cb01
MM		 1001 if (vcpu->kvm->arch.gisa &&
1002 kvm_s390_gisa_tac_ipm_gisc(vcpu->kvm->arch.gisa, isc)) {
1003 /*
1004 * in case an adapter interrupt was not delivered
1005 * in SIE context KVM will handle the delivery
1006 */
1007 VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc);
1008 memset(&io, 0, sizeof(io));
2496c8e7 1009 io.io_int_word = isc_to_int_word(isc);
ccc40c53 1010 vcpu->stat.deliver_io++;
d7c5cb01
MM		 1011 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
1012 KVM_S390_INT_IO(1, 0, 0, 0),
1013 ((__u32)io.subchannel_id << 16) |
1014 io.subchannel_nr,
1015 ((__u64)io.io_int_parm << 32) |
1016 io.io_int_word);
1017 rc = __do_deliver_io(vcpu, &io);
1018 }
1019out:
1020 return rc;
383d0b05
JF		 1021}
1022
ea5f4969
DH		 1023/* Check whether an external call is pending (deliverable or not) */
1024int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 1025{
ea5f4969 1026 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
4953919f 1027
37c5f6c8 1028 if (!sclp.has_sigpif)
ea5f4969 1029 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 1030
a5bd7647 1031 return sca_ext_call_pending(vcpu, NULL);
4953919f
DH		 1032}
1033
9a022067 1034int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 1035{
4d32ad6b
DH		 1036 if (deliverable_irqs(vcpu))
1037 return 1;
ba5c1e9b 1038
4d32ad6b
DH		 1039 if (kvm_cpu_has_pending_timer(vcpu))
1040 return 1;
ba5c1e9b 1041
ea5f4969 1042 /* external call pending and deliverable */
4d32ad6b 1043 if (kvm_s390_ext_call_pending(vcpu) &&
ea5f4969
DH		 1044 !psw_extint_disabled(vcpu) &&
1045 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
4d32ad6b 1046 return 1;
4953919f 1047
4d32ad6b
DH		 1048 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
1049 return 1;
1050 return 0;
ba5c1e9b
CO		 1051}
1052
3d80840d
MT		 1053int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1054{
b4aec925 1055 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
3d80840d
MT		 1056}
1057
b3c17f10
DH		 1058static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
1059{
5fe01793
DH		 1060 const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
1061 const u64 ckc = vcpu->arch.sie_block->ckc;
1062 u64 cputm, sltime = 0;
b3c17f10
DH		 1063
1064 if (ckc_interrupts_enabled(vcpu)) {
5fe01793
DH		 1065 if (vcpu->arch.sie_block->gcr[0] & 0x0020000000000000ul) {
1066 if ((s64)now < (s64)ckc)
1067 sltime = tod_to_ns((s64)ckc - (s64)now);
1068 } else if (now < ckc) {
1069 sltime = tod_to_ns(ckc - now);
1070 }
1071 /* already expired */
1072 if (!sltime)
b3c17f10
DH		 1073 return 0;
1074 if (cpu_timer_interrupts_enabled(vcpu)) {
1075 cputm = kvm_s390_get_cpu_timer(vcpu);
1076 /* already expired? */
1077 if (cputm >> 63)
1078 return 0;
1079 return min(sltime, tod_to_ns(cputm));
1080 }
1081 } else if (cpu_timer_interrupts_enabled(vcpu)) {
1082 sltime = kvm_s390_get_cpu_timer(vcpu);
1083 /* already expired? */
1084 if (sltime >> 63)
1085 return 0;
1086 }
1087 return sltime;
1088}
1089
ba5c1e9b
CO		 1090int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
1091{
b3c17f10 1092 u64 sltime;
ba5c1e9b
CO		 1093
1094 vcpu->stat.exit_wait_state++;
ba5c1e9b 1095
0759d068 1096 /* fast path */
118b862b 1097 if (kvm_arch_vcpu_runnable(vcpu))
0759d068 1098 return 0;
e52b2af5 1099
ba5c1e9b
CO		 1100 if (psw_interrupts_disabled(vcpu)) {
1101 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 1102 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 1103 }
1104
b3c17f10
DH		 1105 if (!ckc_interrupts_enabled(vcpu) &&
1106 !cpu_timer_interrupts_enabled(vcpu)) {
ba5c1e9b 1107 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 1108 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 1109 goto no_timer;
1110 }
1111
b3c17f10
DH		 1112 sltime = __calculate_sltime(vcpu);
1113 if (!sltime)
bda343ef
DH		 1114 return 0;
1115
1116 __set_cpu_idle(vcpu);
8b0e1953 1117 hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL);
b3c17f10 1118 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
ba5c1e9b 1119no_timer:
800c1065 1120 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 1121 kvm_vcpu_block(vcpu);
ba5c1e9b 1122 __unset_cpu_idle(vcpu);
800c1065
TH		 1123 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1124
2d00f759 1125 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 1126 return 0;
1127}
1128
0e9c85a5
DH		 1129void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
1130{
3491caf2
CB		 1131 /*
1132 * We cannot move this into the if, as the CPU might be already
1133 * in kvm_vcpu_block without having the waitqueue set (polling)
1134 */
1135 vcpu->valid_wakeup = true;
72e1ad42
CB		 1136 /*
1137 * This is mostly to document, that the read in swait_active could
1138 * be moved before other stores, leading to subtle races.
1139 * All current users do not store or use an atomic like update
1140 */
1141 smp_mb__after_atomic();
8577370f 1142 if (swait_active(&vcpu->wq)) {
0e9c85a5
DH		 1143 /*
1144 * The vcpu gave up the cpu voluntarily, mark it as a good
1145 * yield-candidate.
1146 */
1147 vcpu->preempted = true;
8577370f 1148 swake_up(&vcpu->wq);
ce2e4f0b 1149 vcpu->stat.halt_wakeup++;
0e9c85a5 1150 }
adbf1698
DH		 1151 /*
1152 * The VCPU might not be sleeping but is executing the VSIE. Let's
1153 * kick it, so it leaves the SIE to process the request.
1154 */
1155 kvm_s390_vsie_kick(vcpu);
0e9c85a5
DH		 1156}
1157
ca872302
CB		 1158enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
1159{
1160 struct kvm_vcpu *vcpu;
b3c17f10 1161 u64 sltime;
ca872302
CB		 1162
1163 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
b3c17f10 1164 sltime = __calculate_sltime(vcpu);
ca872302 1165
2d00f759
DH		 1166 /*
1167 * If the monotonic clock runs faster than the tod clock we might be
1168 * woken up too early and have to go back to sleep to avoid deadlocks.
1169 */
b3c17f10 1170 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime)))
2d00f759
DH		 1171 return HRTIMER_RESTART;
1172 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 1173 return HRTIMER_NORESTART;
1174}
ba5c1e9b 1175
2ed10cc1
JF		 1176void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
1177{
1178 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 1179
4ae3c081 1180 spin_lock(&li->lock);
383d0b05
JF		 1181 li->pending_irqs = 0;
1182 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
1183 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 1184 spin_unlock(&li->lock);
4953919f 1185
a5bd7647 1186 sca_clear_ext_call(vcpu);
2ed10cc1
JF		 1187}
1188
614aeab4 1189int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 1190{
180c12fb 1191 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
79395031 1192 int rc = 0;
383d0b05 1193 unsigned long irq_type;
6d3da241 1194 unsigned long irqs;
ba5c1e9b
CO		 1195
1196 __reset_intercept_indicators(vcpu);
ba5c1e9b 1197
383d0b05
JF		 1198 /* pending ckc conditions might have been invalidated */
1199 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
b4aec925 1200 if (ckc_irq_pending(vcpu))
383d0b05
JF		 1201 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1202
b4aec925
DH		 1203 /* pending cpu timer conditions might have been invalidated */
1204 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1205 if (cpu_timer_irq_pending(vcpu))
1206 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1207
ffeca0ae 1208 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
c7901a6e
MM		 1209 /* bits are in the reverse order of interrupt priority */
1210 irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT);
baabee67
DH		 1211 switch (irq_type) {
1212 case IRQ_PEND_IO_ISC_0:
1213 case IRQ_PEND_IO_ISC_1:
1214 case IRQ_PEND_IO_ISC_2:
1215 case IRQ_PEND_IO_ISC_3:
1216 case IRQ_PEND_IO_ISC_4:
1217 case IRQ_PEND_IO_ISC_5:
1218 case IRQ_PEND_IO_ISC_6:
1219 case IRQ_PEND_IO_ISC_7:
6d3da241 1220 rc = __deliver_io(vcpu, irq_type);
baabee67
DH		 1221 break;
1222 case IRQ_PEND_MCHK_EX:
1223 case IRQ_PEND_MCHK_REP:
1224 rc = __deliver_machine_check(vcpu);
1225 break;
1226 case IRQ_PEND_PROG:
1227 rc = __deliver_prog(vcpu);
1228 break;
1229 case IRQ_PEND_EXT_EMERGENCY:
1230 rc = __deliver_emergency_signal(vcpu);
1231 break;
1232 case IRQ_PEND_EXT_EXTERNAL:
1233 rc = __deliver_external_call(vcpu);
1234 break;
1235 case IRQ_PEND_EXT_CLOCK_COMP:
1236 rc = __deliver_ckc(vcpu);
1237 break;
1238 case IRQ_PEND_EXT_CPU_TIMER:
1239 rc = __deliver_cpu_timer(vcpu);
1240 break;
1241 case IRQ_PEND_RESTART:
1242 rc = __deliver_restart(vcpu);
1243 break;
1244 case IRQ_PEND_SET_PREFIX:
1245 rc = __deliver_set_prefix(vcpu);
1246 break;
1247 case IRQ_PEND_PFAULT_INIT:
1248 rc = __deliver_pfault_init(vcpu);
1249 break;
1250 case IRQ_PEND_EXT_SERVICE:
1251 rc = __deliver_service(vcpu);
1252 break;
1253 case IRQ_PEND_PFAULT_DONE:
1254 rc = __deliver_pfault_done(vcpu);
1255 break;
1256 case IRQ_PEND_VIRTIO:
1257 rc = __deliver_virtio(vcpu);
1258 break;
1259 default:
1260 WARN_ONCE(1, "Unknown pending irq type %ld", irq_type);
1261 clear_bit(irq_type, &li->pending_irqs);
383d0b05 1262 }
ffeca0ae 1263 }
383d0b05 1264
6d3da241 1265 set_intercept_indicators(vcpu);
79395031
JF		 1266
1267 return rc;
ba5c1e9b
CO		 1268}
1269
383d0b05 1270static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1271{
1272 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1273
ccc40c53 1274 vcpu->stat.inject_program++;
ed2afcfa
DH		 1275 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1276 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1277 irq->u.pgm.code, 0);
1278
634790b8
DH		 1279 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) {
1280 /* auto detection if no valid ILC was given */
1281 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK;
1282 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu);
1283 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID;
1284 }
1285
238293b1
DH		 1286 if (irq->u.pgm.code == PGM_PER) {
1287 li->irq.pgm.code |= PGM_PER;
634790b8 1288 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1289 /* only modify PER related information */
1290 li->irq.pgm.per_address = irq->u.pgm.per_address;
1291 li->irq.pgm.per_code = irq->u.pgm.per_code;
1292 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1293 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1294 } else if (!(irq->u.pgm.code & PGM_PER)) {
1295 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1296 irq->u.pgm.code;
634790b8 1297 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1298 /* only modify non-PER information */
1299 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1300 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1301 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1302 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1303 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1304 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1305 } else {
1306 li->irq.pgm = irq->u.pgm;
1307 }
9185124e 1308 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 1309 return 0;
1310}
1311
383d0b05 1312static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1313{
1314 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1315
ccc40c53 1316 vcpu->stat.inject_pfault_init++;
3f24ba15
CB		 1317 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1318 irq->u.ext.ext_params2);
383d0b05
JF		 1319 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1320 irq->u.ext.ext_params,
ed2afcfa 1321 irq->u.ext.ext_params2);
383d0b05
JF		 1322
1323 li->irq.ext = irq->u.ext;
1324 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
2018224d 1325 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1326 return 0;
1327}
1328
0675d92d 1329static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1330{
1331 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1332 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1333 uint16_t src_id = irq->u.extcall.code;
0146a7b0 1334
ccc40c53 1335 vcpu->stat.inject_external_call++;
3f24ba15 1336 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
ea5f4969 1337 src_id);
383d0b05 1338 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ed2afcfa 1339 src_id, 0);
ea5f4969
DH		 1340
1341 /* sending vcpu invalid */
152e9f65 1342 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
ea5f4969
DH		 1343 return -EINVAL;
1344
37c5f6c8 1345 if (sclp.has_sigpif)
a5bd7647 1346 return sca_inject_ext_call(vcpu, src_id);
383d0b05 1347
b938eace 1348 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
ea5f4969 1349 return -EBUSY;
383d0b05 1350 *extcall = irq->u.extcall;
2018224d 1351 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1352 return 0;
1353}
1354
383d0b05 1355static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1356{
1357 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1358 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0 1359
ccc40c53 1360 vcpu->stat.inject_set_prefix++;
ed2afcfa 1361 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
556cc0da 1362 irq->u.prefix.address);
383d0b05 1363 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
ed2afcfa 1364 irq->u.prefix.address, 0);
383d0b05 1365
a3a9c59a
DH		 1366 if (!is_vcpu_stopped(vcpu))
1367 return -EBUSY;
1368
383d0b05
JF		 1369 *prefix = irq->u.prefix;
1370 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1371 return 0;
1372}
1373
6cddd432 1374#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1375static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1376{
1377 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1378 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1379 int rc = 0;
0146a7b0 1380
ccc40c53 1381 vcpu->stat.inject_stop_signal++;
ed2afcfa 1382 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
383d0b05 1383
2822545f
DH		 1384 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1385 return -EINVAL;
1386
6cddd432
DH		 1387 if (is_vcpu_stopped(vcpu)) {
1388 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1389 rc = kvm_s390_store_status_unloaded(vcpu,
1390 KVM_S390_STORE_STATUS_NOADDR);
1391 return rc;
1392 }
1393
1394 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1395 return -EBUSY;
2822545f 1396 stop->flags = irq->u.stop.flags;
2018224d 1397 kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1398 return 0;
1399}
1400
1401static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1402 struct kvm_s390_irq *irq)
0146a7b0
JF		 1403{
1404 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1405
ccc40c53 1406 vcpu->stat.inject_restart++;
3f24ba15 1407 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
ed2afcfa 1408 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
383d0b05
JF		 1409
1410 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1411 return 0;
1412}
1413
1414static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1415 struct kvm_s390_irq *irq)
0146a7b0
JF		 1416{
1417 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1418
ccc40c53 1419 vcpu->stat.inject_emergency_signal++;
3f24ba15 1420 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
383d0b05
JF		 1421 irq->u.emerg.code);
1422 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
ed2afcfa 1423 irq->u.emerg.code, 0);
383d0b05 1424
b85de33a
DH		 1425 /* sending vcpu invalid */
1426 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1427 return -EINVAL;
1428
49538d12 1429 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1430 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
2018224d 1431 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1432 return 0;
1433}
1434
383d0b05 1435static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1436{
1437 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1438 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0 1439
ccc40c53 1440 vcpu->stat.inject_mchk++;
3f24ba15 1441 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
556cc0da 1442 irq->u.mchk.mcic);
383d0b05 1443 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
ed2afcfa 1444 irq->u.mchk.mcic);
383d0b05
JF		 1445
1446 /*
fc2020cf
JF		 1447 * Because repressible machine checks can be indicated along with
1448 * exigent machine checks (PoP, Chapter 11, Interruption action)
1449 * we need to combine cr14, mcic and external damage code.
1450 * Failing storage address and the logout area should not be or'ed
1451 * together, we just indicate the last occurrence of the corresponding
1452 * machine check
383d0b05 1453 */
fc2020cf 1454 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1455 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1456 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1457 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1458 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1459 sizeof(mchk->fixed_logout));
383d0b05
JF		 1460 if (mchk->mcic & MCHK_EX_MASK)
1461 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1462 else if (mchk->mcic & MCHK_REP_MASK)
1463 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1464 return 0;
1465}
1466
383d0b05 1467static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1468{
1469 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1470
ccc40c53 1471 vcpu->stat.inject_ckc++;
3f24ba15 1472 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
383d0b05 1473 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
ed2afcfa 1474 0, 0);
383d0b05
JF		 1475
1476 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
2018224d 1477 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1478 return 0;
1479}
1480
383d0b05 1481static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1482{
1483 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1484
ccc40c53 1485 vcpu->stat.inject_cputm++;
3f24ba15 1486 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
383d0b05 1487 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
ed2afcfa 1488 0, 0);
383d0b05
JF		 1489
1490 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
2018224d 1491 kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
ba5c1e9b
CO		 1492 return 0;
1493}
1494
6d3da241
JF		 1495static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1496 int isc, u32 schid)
1497{
1498 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1499 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1500 struct kvm_s390_interrupt_info *iter;
1501 u16 id = (schid & 0xffff0000U) >> 16;
1502 u16 nr = schid & 0x0000ffffU;
1503
1504 spin_lock(&fi->lock);
1505 list_for_each_entry(iter, isc_list, list) {
1506 if (schid && (id != iter->io.subchannel_id ||
1507 nr != iter->io.subchannel_nr))
1508 continue;
1509 /* found an appropriate entry */
1510 list_del_init(&iter->list);
1511 fi->counters[FIRQ_CNTR_IO] -= 1;
1512 if (list_empty(isc_list))
ee739f4b 1513 clear_bit(isc_to_irq_type(isc), &fi->pending_irqs);
6d3da241
JF		 1514 spin_unlock(&fi->lock);
1515 return iter;
1516 }
1517 spin_unlock(&fi->lock);
1518 return NULL;
1519}
383d0b05 1520
4b35f65e
MM		 1521static struct kvm_s390_interrupt_info *get_top_io_int(struct kvm *kvm,
1522 u64 isc_mask, u32 schid)
1523{
1524 struct kvm_s390_interrupt_info *inti = NULL;
1525 int isc;
1526
1527 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1528 if (isc_mask & isc_to_isc_bits(isc))
1529 inti = get_io_int(kvm, isc, schid);
1530 }
1531 return inti;
1532}
1533
1534static int get_top_gisa_isc(struct kvm *kvm, u64 isc_mask, u32 schid)
1535{
1536 unsigned long active_mask;
1537 int isc;
1538
1539 if (schid)
1540 goto out;
1541 if (!kvm->arch.gisa)
1542 goto out;
1543
1544 active_mask = (isc_mask & kvm_s390_gisa_get_ipm(kvm->arch.gisa) << 24) << 32;
1545 while (active_mask) {
1546 isc = __fls(active_mask) ^ (BITS_PER_LONG - 1);
1547 if (kvm_s390_gisa_tac_ipm_gisc(kvm->arch.gisa, isc))
1548 return isc;
1549 clear_bit_inv(isc, &active_mask);
1550 }
1551out:
1552 return -EINVAL;
1553}
1554
6d3da241
JF		 1555/*
1556 * Dequeue and return an I/O interrupt matching any of the interruption
1557 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
4b35f65e
MM		 1558 * Take into account the interrupts pending in the interrupt list and in GISA.
1559 *
1560 * Note that for a guest that does not enable I/O interrupts
1561 * but relies on TPI, a flood of classic interrupts may starve
1562 * out adapter interrupts on the same isc. Linux does not do
1563 * that, and it is possible to work around the issue by configuring
1564 * different iscs for classic and adapter interrupts in the guest,
1565 * but we may want to revisit this in the future.
6d3da241 1566 */
fa6b7fe9 1567struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241
JF		 1568 u64 isc_mask, u32 schid)
1569{
4b35f65e 1570 struct kvm_s390_interrupt_info *inti, *tmp_inti;
6d3da241
JF		 1571 int isc;
1572
4b35f65e
MM		 1573 inti = get_top_io_int(kvm, isc_mask, schid);
1574
1575 isc = get_top_gisa_isc(kvm, isc_mask, schid);
1576 if (isc < 0)
1577 /* no AI in GISA */
1578 goto out;
1579
1580 if (!inti)
1581 /* AI in GISA but no classical IO int */
1582 goto gisa_out;
1583
1584 /* both types of interrupts present */
1585 if (int_word_to_isc(inti->io.io_int_word) <= isc) {
1586 /* classical IO int with higher priority */
1587 kvm_s390_gisa_set_ipm_gisc(kvm->arch.gisa, isc);
1588 goto out;
6d3da241 1589 }
4b35f65e
MM		 1590gisa_out:
1591 tmp_inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1592 if (tmp_inti) {
1593 tmp_inti->type = KVM_S390_INT_IO(1, 0, 0, 0);
1594 tmp_inti->io.io_int_word = isc_to_int_word(isc);
1595 if (inti)
1596 kvm_s390_reinject_io_int(kvm, inti);
1597 inti = tmp_inti;
1598 } else
1599 kvm_s390_gisa_set_ipm_gisc(kvm->arch.gisa, isc);
1600out:
6d3da241
JF		 1601 return inti;
1602}
1603
1604#define SCCB_MASK 0xFFFFFFF8
1605#define SCCB_EVENT_PENDING 0x3
1606
1607static int __inject_service(struct kvm *kvm,
1608 struct kvm_s390_interrupt_info *inti)
1609{
1610 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1611
ccc40c53 1612 kvm->stat.inject_service_signal++;
6d3da241
JF		 1613 spin_lock(&fi->lock);
1614 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1615 /*
1616 * Early versions of the QEMU s390 bios will inject several
1617 * service interrupts after another without handling a
1618 * condition code indicating busy.
1619 * We will silently ignore those superfluous sccb values.
1620 * A future version of QEMU will take care of serialization
1621 * of servc requests
1622 */
1623 if (fi->srv_signal.ext_params & SCCB_MASK)
1624 goto out;
1625 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1626 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1627out:
1628 spin_unlock(&fi->lock);
1629 kfree(inti);
1630 return 0;
1631}
1632
1633static int __inject_virtio(struct kvm *kvm,
1634 struct kvm_s390_interrupt_info *inti)
1635{
1636 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1637
ccc40c53 1638 kvm->stat.inject_virtio++;
6d3da241
JF		 1639 spin_lock(&fi->lock);
1640 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1641 spin_unlock(&fi->lock);
1642 return -EBUSY;
1643 }
1644 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1645 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1646 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1647 spin_unlock(&fi->lock);
1648 return 0;
1649}
1650
1651static int __inject_pfault_done(struct kvm *kvm,
1652 struct kvm_s390_interrupt_info *inti)
1653{
1654 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1655
ccc40c53 1656 kvm->stat.inject_pfault_done++;
6d3da241
JF		 1657 spin_lock(&fi->lock);
1658 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1659 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1660 spin_unlock(&fi->lock);
1661 return -EBUSY;
1662 }
1663 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1664 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1665 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1666 spin_unlock(&fi->lock);
1667 return 0;
1668}
1669
1670#define CR_PENDING_SUBCLASS 28
1671static int __inject_float_mchk(struct kvm *kvm,
1672 struct kvm_s390_interrupt_info *inti)
1673{
1674 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1675
ccc40c53 1676 kvm->stat.inject_float_mchk++;
6d3da241
JF		 1677 spin_lock(&fi->lock);
1678 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1679 fi->mchk.mcic |= inti->mchk.mcic;
1680 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1681 spin_unlock(&fi->lock);
1682 kfree(inti);
1683 return 0;
1684}
1685
1686static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
fa6b7fe9
CH		 1687{
1688 struct kvm_s390_float_interrupt *fi;
6d3da241
JF		 1689 struct list_head *list;
1690 int isc;
fa6b7fe9 1691
ccc40c53 1692 kvm->stat.inject_io++;
d7c5cb01
MM		 1693 isc = int_word_to_isc(inti->io.io_int_word);
1694
1695 if (kvm->arch.gisa && inti->type & KVM_S390_INT_IO_AI_MASK) {
1696 VM_EVENT(kvm, 4, "%s isc %1u", "inject: I/O (AI/gisa)", isc);
1697 kvm_s390_gisa_set_ipm_gisc(kvm->arch.gisa, isc);
1698 kfree(inti);
1699 return 0;
1700 }
1701
fa6b7fe9
CH		 1702 fi = &kvm->arch.float_int;
1703 spin_lock(&fi->lock);
6d3da241
JF		 1704 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1705 spin_unlock(&fi->lock);
1706 return -EBUSY;
a91b8ebe 1707 }
6d3da241
JF		 1708 fi->counters[FIRQ_CNTR_IO] += 1;
1709
dcc98ea6
CB		 1710 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1711 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)");
1712 else
1713 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x",
1714 inti->io.subchannel_id >> 8,
1715 inti->io.subchannel_id >> 1 & 0x3,
1716 inti->io.subchannel_nr);
6d3da241
JF		 1717 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1718 list_add_tail(&inti->list, list);
ee739f4b 1719 set_bit(isc_to_irq_type(isc), &fi->pending_irqs);
fa6b7fe9 1720 spin_unlock(&fi->lock);
6d3da241 1721 return 0;
fa6b7fe9 1722}
ba5c1e9b 1723
96e0ed23
DH		 1724/*
1725 * Find a destination VCPU for a floating irq and kick it.
1726 */
1727static void __floating_irq_kick(struct kvm *kvm, u64 type)
ba5c1e9b 1728{
96e0ed23 1729 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
96e0ed23
DH		 1730 struct kvm_vcpu *dst_vcpu;
1731 int sigcpu, online_vcpus, nr_tries = 0;
1732
1733 online_vcpus = atomic_read(&kvm->online_vcpus);
1734 if (!online_vcpus)
1735 return;
1736
1737 /* find idle VCPUs first, then round robin */
1738 sigcpu = find_first_bit(fi->idle_mask, online_vcpus);
1739 if (sigcpu == online_vcpus) {
1740 do {
1741 sigcpu = fi->next_rr_cpu;
1742 fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus;
1743 /* avoid endless loops if all vcpus are stopped */
1744 if (nr_tries++ >= online_vcpus)
1745 return;
1746 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1747 }
1748 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1749
1750 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
96e0ed23
DH		 1751 switch (type) {
1752 case KVM_S390_MCHK:
2018224d 1753 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT);
96e0ed23
DH		 1754 break;
1755 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
a9810327
CB		 1756 if (!(type & KVM_S390_INT_IO_AI_MASK && kvm->arch.gisa))
1757 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT);
96e0ed23
DH		 1758 break;
1759 default:
2018224d 1760 kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT);
96e0ed23
DH		 1761 break;
1762 }
96e0ed23
DH		 1763 kvm_s390_vcpu_wakeup(dst_vcpu);
1764}
1765
1766static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1767{
6d3da241
JF		 1768 u64 type = READ_ONCE(inti->type);
1769 int rc;
ba5c1e9b 1770
6d3da241
JF		 1771 switch (type) {
1772 case KVM_S390_MCHK:
1773 rc = __inject_float_mchk(kvm, inti);
1774 break;
1775 case KVM_S390_INT_VIRTIO:
1776 rc = __inject_virtio(kvm, inti);
1777 break;
1778 case KVM_S390_INT_SERVICE:
1779 rc = __inject_service(kvm, inti);
1780 break;
1781 case KVM_S390_INT_PFAULT_DONE:
1782 rc = __inject_pfault_done(kvm, inti);
1783 break;
1784 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1785 rc = __inject_io(kvm, inti);
1786 break;
1787 default:
a91b8ebe 1788 rc = -EINVAL;
c05c4186 1789 }
6d3da241
JF		 1790 if (rc)
1791 return rc;
1792
96e0ed23 1793 __floating_irq_kick(kvm, type);
6d3da241 1794 return 0;
c05c4186
JF		 1795}
1796
1797int kvm_s390_inject_vm(struct kvm *kvm,
1798 struct kvm_s390_interrupt *s390int)
1799{
1800 struct kvm_s390_interrupt_info *inti;
428d53be 1801 int rc;
c05c4186 1802
ba5c1e9b
CO		 1803 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1804 if (!inti)
1805 return -ENOMEM;
1806
c05c4186
JF		 1807 inti->type = s390int->type;
1808 switch (inti->type) {
ba5c1e9b 1809 case KVM_S390_INT_VIRTIO:
33e19115 1810 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1811 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1812 inti->ext.ext_params = s390int->parm;
1813 inti->ext.ext_params2 = s390int->parm64;
1814 break;
1815 case KVM_S390_INT_SERVICE:
3f24ba15 1816 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1817 inti->ext.ext_params = s390int->parm;
1818 break;
3c038e6b 1819 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 1820 inti->ext.ext_params2 = s390int->parm64;
1821 break;
48a3e950 1822 case KVM_S390_MCHK:
3f24ba15 1823 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
48a3e950 1824 s390int->parm64);
48a3e950
CH		 1825 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1826 inti->mchk.mcic = s390int->parm64;
1827 break;
d8346b7d 1828 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
d8346b7d
CH		 1829 inti->io.subchannel_id = s390int->parm >> 16;
1830 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1831 inti->io.io_int_parm = s390int->parm64 >> 32;
1832 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1833 break;
ba5c1e9b
CO		 1834 default:
1835 kfree(inti);
1836 return -EINVAL;
1837 }
ade38c31
CH		 1838 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1839 2);
ba5c1e9b 1840
428d53be
DH		 1841 rc = __inject_vm(kvm, inti);
1842 if (rc)
1843 kfree(inti);
1844 return rc;
ba5c1e9b
CO		 1845}
1846
15462e37 1847int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 1848 struct kvm_s390_interrupt_info *inti)
1849{
15462e37 1850 return __inject_vm(kvm, inti);
2f32d4ea
CH		 1851}
1852
383d0b05
JF		 1853int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1854 struct kvm_s390_irq *irq)
1855{
1856 irq->type = s390int->type;
1857 switch (irq->type) {
1858 case KVM_S390_PROGRAM_INT:
1859 if (s390int->parm & 0xffff0000)
1860 return -EINVAL;
1861 irq->u.pgm.code = s390int->parm;
1862 break;
1863 case KVM_S390_SIGP_SET_PREFIX:
1864 irq->u.prefix.address = s390int->parm;
1865 break;
2822545f
DH		 1866 case KVM_S390_SIGP_STOP:
1867 irq->u.stop.flags = s390int->parm;
1868 break;
383d0b05 1869 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 1870 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1871 return -EINVAL;
1872 irq->u.extcall.code = s390int->parm;
1873 break;
1874 case KVM_S390_INT_EMERGENCY:
94d1f564 1875 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1876 return -EINVAL;
1877 irq->u.emerg.code = s390int->parm;
1878 break;
1879 case KVM_S390_MCHK:
1880 irq->u.mchk.mcic = s390int->parm64;
1881 break;
1882 }
1883 return 0;
1884}
1885
6cddd432
DH		 1886int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1887{
1888 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1889
1890 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1891}
1892
1893void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1894{
1895 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1896
1897 spin_lock(&li->lock);
1898 li->irq.stop.flags = 0;
1899 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1900 spin_unlock(&li->lock);
1901}
1902
79e87a10 1903static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 1904{
0146a7b0 1905 int rc;
ba5c1e9b 1906
383d0b05 1907 switch (irq->type) {
ba5c1e9b 1908 case KVM_S390_PROGRAM_INT:
383d0b05 1909 rc = __inject_prog(vcpu, irq);
ba5c1e9b 1910 break;
b7e6e4d3 1911 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 1912 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 1913 break;
ba5c1e9b 1914 case KVM_S390_SIGP_STOP:
383d0b05 1915 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 1916 break;
ba5c1e9b 1917 case KVM_S390_RESTART:
383d0b05 1918 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 1919 break;
e029ae5b 1920 case KVM_S390_INT_CLOCK_COMP:
383d0b05 1921 rc = __inject_ckc(vcpu);
0146a7b0 1922 break;
e029ae5b 1923 case KVM_S390_INT_CPU_TIMER:
383d0b05 1924 rc = __inject_cpu_timer(vcpu);
82a12737 1925 break;
7697e71f 1926 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 1927 rc = __inject_extcall(vcpu, irq);
82a12737 1928 break;
ba5c1e9b 1929 case KVM_S390_INT_EMERGENCY:
383d0b05 1930 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 1931 break;
48a3e950 1932 case KVM_S390_MCHK:
383d0b05 1933 rc = __inject_mchk(vcpu, irq);
48a3e950 1934 break;
3c038e6b 1935 case KVM_S390_INT_PFAULT_INIT:
383d0b05 1936 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 1937 break;
ba5c1e9b
CO		 1938 case KVM_S390_INT_VIRTIO:
1939 case KVM_S390_INT_SERVICE:
d8346b7d 1940 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 1941 default:
0146a7b0 1942 rc = -EINVAL;
ba5c1e9b 1943 }
79e87a10
JF		 1944
1945 return rc;
1946}
1947
1948int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1949{
1950 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1951 int rc;
1952
1953 spin_lock(&li->lock);
1954 rc = do_inject_vcpu(vcpu, irq);
4ae3c081 1955 spin_unlock(&li->lock);
0146a7b0
JF		 1956 if (!rc)
1957 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 1958 return rc;
ba5c1e9b 1959}
c05c4186 1960
6d3da241 1961static inline void clear_irq_list(struct list_head *_list)
c05c4186 1962{
6d3da241 1963 struct kvm_s390_interrupt_info *inti, *n;
c05c4186 1964
6d3da241 1965 list_for_each_entry_safe(inti, n, _list, list) {
c05c4186
JF		 1966 list_del(&inti->list);
1967 kfree(inti);
1968 }
c05c4186
JF		 1969}
1970
94aa033e
JF		 1971static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
1972 struct kvm_s390_irq *irq)
c05c4186 1973{
94aa033e 1974 irq->type = inti->type;
c05c4186 1975 switch (inti->type) {
3c038e6b
DD		 1976 case KVM_S390_INT_PFAULT_INIT:
1977 case KVM_S390_INT_PFAULT_DONE:
c05c4186 1978 case KVM_S390_INT_VIRTIO:
94aa033e 1979 irq->u.ext = inti->ext;
c05c4186
JF		 1980 break;
1981 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 1982 irq->u.io = inti->io;
c05c4186 1983 break;
c05c4186 1984 }
c05c4186
JF		 1985}
1986
6d3da241
JF		 1987void kvm_s390_clear_float_irqs(struct kvm *kvm)
1988{
1989 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1990 int i;
1991
1992 spin_lock(&fi->lock);
f2ae45ed
JF		 1993 fi->pending_irqs = 0;
1994 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
1995 memset(&fi->mchk, 0, sizeof(fi->mchk));
6d3da241
JF		 1996 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1997 clear_irq_list(&fi->lists[i]);
1998 for (i = 0; i < FIRQ_MAX_COUNT; i++)
1999 fi->counters[i] = 0;
2000 spin_unlock(&fi->lock);
24160af6 2001 kvm_s390_gisa_clear(kvm);
6d3da241
JF		 2002};
2003
94aa033e 2004static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186
JF		 2005{
2006 struct kvm_s390_interrupt_info *inti;
2007 struct kvm_s390_float_interrupt *fi;
94aa033e 2008 struct kvm_s390_irq *buf;
6d3da241 2009 struct kvm_s390_irq *irq;
94aa033e 2010 int max_irqs;
c05c4186
JF		 2011 int ret = 0;
2012 int n = 0;
6d3da241 2013 int i;
c05c4186 2014
94aa033e
JF		 2015 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
2016 return -EINVAL;
2017
2018 /*
2019 * We are already using -ENOMEM to signal
2020 * userspace it may retry with a bigger buffer,
2021 * so we need to use something else for this case
2022 */
2023 buf = vzalloc(len);
2024 if (!buf)
2025 return -ENOBUFS;
2026
2027 max_irqs = len / sizeof(struct kvm_s390_irq);
2028
24160af6
MM		 2029 if (kvm->arch.gisa &&
2030 kvm_s390_gisa_get_ipm(kvm->arch.gisa)) {
2031 for (i = 0; i <= MAX_ISC; i++) {
2032 if (n == max_irqs) {
2033 /* signal userspace to try again */
2034 ret = -ENOMEM;
2035 goto out_nolock;
2036 }
2037 if (kvm_s390_gisa_tac_ipm_gisc(kvm->arch.gisa, i)) {
2038 irq = (struct kvm_s390_irq *) &buf[n];
2039 irq->type = KVM_S390_INT_IO(1, 0, 0, 0);
2040 irq->u.io.io_int_word = isc_to_int_word(i);
2041 n++;
2042 }
2043 }
2044 }
c05c4186
JF		 2045 fi = &kvm->arch.float_int;
2046 spin_lock(&fi->lock);
6d3da241
JF		 2047 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
2048 list_for_each_entry(inti, &fi->lists[i], list) {
2049 if (n == max_irqs) {
2050 /* signal userspace to try again */
2051 ret = -ENOMEM;
2052 goto out;
2053 }
2054 inti_to_irq(inti, &buf[n]);
2055 n++;
2056 }
2057 }
2058 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
94aa033e 2059 if (n == max_irqs) {
c05c4186
JF		 2060 /* signal userspace to try again */
2061 ret = -ENOMEM;
6d3da241 2062 goto out;
c05c4186 2063 }
6d3da241
JF		 2064 irq = (struct kvm_s390_irq *) &buf[n];
2065 irq->type = KVM_S390_INT_SERVICE;
2066 irq->u.ext = fi->srv_signal;
c05c4186
JF		 2067 n++;
2068 }
6d3da241
JF		 2069 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
2070 if (n == max_irqs) {
2071 /* signal userspace to try again */
2072 ret = -ENOMEM;
2073 goto out;
2074 }
2075 irq = (struct kvm_s390_irq *) &buf[n];
2076 irq->type = KVM_S390_MCHK;
2077 irq->u.mchk = fi->mchk;
2078 n++;
2079}
2080
2081out:
c05c4186 2082 spin_unlock(&fi->lock);
24160af6 2083out_nolock:
94aa033e
JF		 2084 if (!ret && n > 0) {
2085 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
2086 ret = -EFAULT;
2087 }
2088 vfree(buf);
c05c4186
JF		 2089
2090 return ret < 0 ? ret : n;
2091}
2092
2c1a48f2
YMZ		 2093static int flic_ais_mode_get_all(struct kvm *kvm, struct kvm_device_attr *attr)
2094{
2095 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2096 struct kvm_s390_ais_all ais;
2097
2098 if (attr->attr < sizeof(ais))
2099 return -EINVAL;
2100
2101 if (!test_kvm_facility(kvm, 72))
2102 return -ENOTSUPP;
2103
2104 mutex_lock(&fi->ais_lock);
2105 ais.simm = fi->simm;
2106 ais.nimm = fi->nimm;
2107 mutex_unlock(&fi->ais_lock);
2108
2109 if (copy_to_user((void __user *)attr->addr, &ais, sizeof(ais)))
2110 return -EFAULT;
2111
2112 return 0;
2113}
2114
c05c4186
JF		 2115static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2116{
2117 int r;
2118
2119 switch (attr->group) {
2120 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 2121 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 2122 attr->attr);
2123 break;
2c1a48f2
YMZ		 2124 case KVM_DEV_FLIC_AISM_ALL:
2125 r = flic_ais_mode_get_all(dev->kvm, attr);
2126 break;
c05c4186
JF		 2127 default:
2128 r = -EINVAL;
2129 }
2130
2131 return r;
2132}
2133
2134static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
2135 u64 addr)
2136{
2137 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
2138 void *target = NULL;
2139 void __user *source;
2140 u64 size;
2141
2142 if (get_user(inti->type, (u64 __user *)addr))
2143 return -EFAULT;
2144
2145 switch (inti->type) {
3c038e6b
DD		 2146 case KVM_S390_INT_PFAULT_INIT:
2147 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 2148 case KVM_S390_INT_VIRTIO:
2149 case KVM_S390_INT_SERVICE:
2150 target = (void *) &inti->ext;
2151 source = &uptr->u.ext;
2152 size = sizeof(inti->ext);
2153 break;
2154 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
2155 target = (void *) &inti->io;
2156 source = &uptr->u.io;
2157 size = sizeof(inti->io);
2158 break;
2159 case KVM_S390_MCHK:
2160 target = (void *) &inti->mchk;
2161 source = &uptr->u.mchk;
2162 size = sizeof(inti->mchk);
2163 break;
2164 default:
2165 return -EINVAL;
2166 }
2167
2168 if (copy_from_user(target, source, size))
2169 return -EFAULT;
2170
2171 return 0;
2172}
2173
2174static int enqueue_floating_irq(struct kvm_device *dev,
2175 struct kvm_device_attr *attr)
2176{
2177 struct kvm_s390_interrupt_info *inti = NULL;
2178 int r = 0;
2179 int len = attr->attr;
2180
2181 if (len % sizeof(struct kvm_s390_irq) != 0)
2182 return -EINVAL;
2183 else if (len > KVM_S390_FLIC_MAX_BUFFER)
2184 return -EINVAL;
2185
2186 while (len >= sizeof(struct kvm_s390_irq)) {
2187 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
2188 if (!inti)
2189 return -ENOMEM;
2190
2191 r = copy_irq_from_user(inti, attr->addr);
2192 if (r) {
2193 kfree(inti);
2194 return r;
2195 }
a91b8ebe
JF		 2196 r = __inject_vm(dev->kvm, inti);
2197 if (r) {
2198 kfree(inti);
2199 return r;
2200 }
c05c4186
JF		 2201 len -= sizeof(struct kvm_s390_irq);
2202 attr->addr += sizeof(struct kvm_s390_irq);
2203 }
2204
2205 return r;
2206}
2207
841b91c5
CH		 2208static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
2209{
2210 if (id >= MAX_S390_IO_ADAPTERS)
2211 return NULL;
2212 return kvm->arch.adapters[id];
2213}
2214
2215static int register_io_adapter(struct kvm_device *dev,
2216 struct kvm_device_attr *attr)
2217{
2218 struct s390_io_adapter *adapter;
2219 struct kvm_s390_io_adapter adapter_info;
2220
2221 if (copy_from_user(&adapter_info,
2222 (void __user *)attr->addr, sizeof(adapter_info)))
2223 return -EFAULT;
2224
2225 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
2226 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
2227 return -EINVAL;
2228
2229 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2230 if (!adapter)
2231 return -ENOMEM;
2232
2233 INIT_LIST_HEAD(&adapter->maps);
2234 init_rwsem(&adapter->maps_lock);
2235 atomic_set(&adapter->nr_maps, 0);
2236 adapter->id = adapter_info.id;
2237 adapter->isc = adapter_info.isc;
2238 adapter->maskable = adapter_info.maskable;
2239 adapter->masked = false;
2240 adapter->swap = adapter_info.swap;
08fab50d
FL		 2241 adapter->suppressible = (adapter_info.flags) &
2242 KVM_S390_ADAPTER_SUPPRESSIBLE;
841b91c5
CH		 2243 dev->kvm->arch.adapters[adapter->id] = adapter;
2244
2245 return 0;
2246}
2247
2248int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
2249{
2250 int ret;
2251 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2252
2253 if (!adapter || !adapter->maskable)
2254 return -EINVAL;
2255 ret = adapter->masked;
2256 adapter->masked = masked;
2257 return ret;
2258}
2259
2260static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
2261{
2262 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2263 struct s390_map_info *map;
2264 int ret;
2265
2266 if (!adapter || !addr)
2267 return -EINVAL;
2268
2269 map = kzalloc(sizeof(*map), GFP_KERNEL);
2270 if (!map) {
2271 ret = -ENOMEM;
2272 goto out;
2273 }
2274 INIT_LIST_HEAD(&map->list);
2275 map->guest_addr = addr;
6e0a0431 2276 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 2277 if (map->addr == -EFAULT) {
2278 ret = -EFAULT;
2279 goto out;
2280 }
2281 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
2282 if (ret < 0)
2283 goto out;
2284 BUG_ON(ret != 1);
2285 down_write(&adapter->maps_lock);
2286 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
2287 list_add_tail(&map->list, &adapter->maps);
2288 ret = 0;
2289 } else {
2290 put_page(map->page);
2291 ret = -EINVAL;
2292 }
2293 up_write(&adapter->maps_lock);
2294out:
2295 if (ret)
2296 kfree(map);
2297 return ret;
2298}
2299
2300static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
2301{
2302 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2303 struct s390_map_info *map, *tmp;
2304 int found = 0;
2305
2306 if (!adapter || !addr)
2307 return -EINVAL;
2308
2309 down_write(&adapter->maps_lock);
2310 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
2311 if (map->guest_addr == addr) {
2312 found = 1;
2313 atomic_dec(&adapter->nr_maps);
2314 list_del(&map->list);
2315 put_page(map->page);
2316 kfree(map);
2317 break;
2318 }
2319 }
2320 up_write(&adapter->maps_lock);
2321
2322 return found ? 0 : -EINVAL;
2323}
2324
2325void kvm_s390_destroy_adapters(struct kvm *kvm)
2326{
2327 int i;
2328 struct s390_map_info *map, *tmp;
2329
2330 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
2331 if (!kvm->arch.adapters[i])
2332 continue;
2333 list_for_each_entry_safe(map, tmp,
2334 &kvm->arch.adapters[i]->maps, list) {
2335 list_del(&map->list);
2336 put_page(map->page);
2337 kfree(map);
2338 }
2339 kfree(kvm->arch.adapters[i]);
2340 }
2341}
2342
2343static int modify_io_adapter(struct kvm_device *dev,
2344 struct kvm_device_attr *attr)
2345{
2346 struct kvm_s390_io_adapter_req req;
2347 struct s390_io_adapter *adapter;
2348 int ret;
2349
2350 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2351 return -EFAULT;
2352
2353 adapter = get_io_adapter(dev->kvm, req.id);
2354 if (!adapter)
2355 return -EINVAL;
2356 switch (req.type) {
2357 case KVM_S390_IO_ADAPTER_MASK:
2358 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
2359 if (ret > 0)
2360 ret = 0;
2361 break;
2362 case KVM_S390_IO_ADAPTER_MAP:
2363 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
2364 break;
2365 case KVM_S390_IO_ADAPTER_UNMAP:
2366 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
2367 break;
2368 default:
2369 ret = -EINVAL;
2370 }
2371
2372 return ret;
2373}
2374
6d28f789
HP		 2375static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
2376
2377{
2378 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
2379 u32 schid;
2380
2381 if (attr->flags)
2382 return -EINVAL;
2383 if (attr->attr != sizeof(schid))
2384 return -EINVAL;
2385 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
2386 return -EFAULT;
4dd6f17e
MM		 2387 if (!schid)
2388 return -EINVAL;
6d28f789
HP		 2389 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
2390 /*
2391 * If userspace is conforming to the architecture, we can have at most
2392 * one pending I/O interrupt per subchannel, so this is effectively a
2393 * clear all.
2394 */
2395 return 0;
2396}
2397
51978393
FL		 2398static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr)
2399{
2400 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2401 struct kvm_s390_ais_req req;
2402 int ret = 0;
2403
1ba15b24 2404 if (!test_kvm_facility(kvm, 72))
51978393
FL		 2405 return -ENOTSUPP;
2406
2407 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2408 return -EFAULT;
2409
2410 if (req.isc > MAX_ISC)
2411 return -EINVAL;
2412
2413 trace_kvm_s390_modify_ais_mode(req.isc,
2414 (fi->simm & AIS_MODE_MASK(req.isc)) ?
2415 (fi->nimm & AIS_MODE_MASK(req.isc)) ?
2416 2 : KVM_S390_AIS_MODE_SINGLE :
2417 KVM_S390_AIS_MODE_ALL, req.mode);
2418
2419 mutex_lock(&fi->ais_lock);
2420 switch (req.mode) {
2421 case KVM_S390_AIS_MODE_ALL:
2422 fi->simm &= ~AIS_MODE_MASK(req.isc);
2423 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2424 break;
2425 case KVM_S390_AIS_MODE_SINGLE:
2426 fi->simm |= AIS_MODE_MASK(req.isc);
2427 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2428 break;
2429 default:
2430 ret = -EINVAL;
2431 }
2432 mutex_unlock(&fi->ais_lock);
2433
2434 return ret;
2435}
2436
a8920950
YMZ		 2437static int kvm_s390_inject_airq(struct kvm *kvm,
2438 struct s390_io_adapter *adapter)
2439{
2440 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2441 struct kvm_s390_interrupt s390int = {
2442 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2443 .parm = 0,
2496c8e7 2444 .parm64 = isc_to_int_word(adapter->isc),
a8920950
YMZ		 2445 };
2446 int ret = 0;
2447
1ba15b24 2448 if (!test_kvm_facility(kvm, 72) || !adapter->suppressible)
a8920950
YMZ		 2449 return kvm_s390_inject_vm(kvm, &s390int);
2450
2451 mutex_lock(&fi->ais_lock);
2452 if (fi->nimm & AIS_MODE_MASK(adapter->isc)) {
2453 trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc);
2454 goto out;
2455 }
2456
2457 ret = kvm_s390_inject_vm(kvm, &s390int);
2458 if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) {
2459 fi->nimm |= AIS_MODE_MASK(adapter->isc);
2460 trace_kvm_s390_modify_ais_mode(adapter->isc,
2461 KVM_S390_AIS_MODE_SINGLE, 2);
2462 }
2463out:
2464 mutex_unlock(&fi->ais_lock);
2465 return ret;
2466}
2467
2468static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr)
2469{
2470 unsigned int id = attr->attr;
2471 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2472
2473 if (!adapter)
2474 return -EINVAL;
2475
2476 return kvm_s390_inject_airq(kvm, adapter);
2477}
2478
2c1a48f2
YMZ		 2479static int flic_ais_mode_set_all(struct kvm *kvm, struct kvm_device_attr *attr)
2480{
2481 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2482 struct kvm_s390_ais_all ais;
2483
2484 if (!test_kvm_facility(kvm, 72))
2485 return -ENOTSUPP;
2486
2487 if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais)))
2488 return -EFAULT;
2489
2490 mutex_lock(&fi->ais_lock);
2491 fi->simm = ais.simm;
2492 fi->nimm = ais.nimm;
2493 mutex_unlock(&fi->ais_lock);
2494
2495 return 0;
2496}
2497
c05c4186
JF		 2498static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2499{
2500 int r = 0;
3c038e6b
DD		 2501 unsigned int i;
2502 struct kvm_vcpu *vcpu;
c05c4186
JF		 2503
2504 switch (attr->group) {
2505 case KVM_DEV_FLIC_ENQUEUE:
2506 r = enqueue_floating_irq(dev, attr);
2507 break;
2508 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 2509 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 2510 break;
3c038e6b
DD		 2511 case KVM_DEV_FLIC_APF_ENABLE:
2512 dev->kvm->arch.gmap->pfault_enabled = 1;
2513 break;
2514 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2515 dev->kvm->arch.gmap->pfault_enabled = 0;
2516 /*
2517 * Make sure no async faults are in transition when
2518 * clearing the queues. So we don't need to worry
2519 * about late coming workers.
2520 */
2521 synchronize_srcu(&dev->kvm->srcu);
2522 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2523 kvm_clear_async_pf_completion_queue(vcpu);
2524 break;
841b91c5
CH		 2525 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2526 r = register_io_adapter(dev, attr);
2527 break;
2528 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2529 r = modify_io_adapter(dev, attr);
2530 break;
6d28f789
HP		 2531 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2532 r = clear_io_irq(dev->kvm, attr);
2533 break;
51978393
FL		 2534 case KVM_DEV_FLIC_AISM:
2535 r = modify_ais_mode(dev->kvm, attr);
2536 break;
a8920950
YMZ		 2537 case KVM_DEV_FLIC_AIRQ_INJECT:
2538 r = flic_inject_airq(dev->kvm, attr);
2539 break;
2c1a48f2
YMZ		 2540 case KVM_DEV_FLIC_AISM_ALL:
2541 r = flic_ais_mode_set_all(dev->kvm, attr);
2542 break;
c05c4186
JF		 2543 default:
2544 r = -EINVAL;
2545 }
2546
2547 return r;
2548}
2549
4f129858
HP		 2550static int flic_has_attr(struct kvm_device *dev,
2551 struct kvm_device_attr *attr)
2552{
2553 switch (attr->group) {
2554 case KVM_DEV_FLIC_GET_ALL_IRQS:
2555 case KVM_DEV_FLIC_ENQUEUE:
2556 case KVM_DEV_FLIC_CLEAR_IRQS:
2557 case KVM_DEV_FLIC_APF_ENABLE:
2558 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2559 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2560 case KVM_DEV_FLIC_ADAPTER_MODIFY:
6d28f789 2561 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
51978393 2562 case KVM_DEV_FLIC_AISM:
a8920950 2563 case KVM_DEV_FLIC_AIRQ_INJECT:
2c1a48f2 2564 case KVM_DEV_FLIC_AISM_ALL:
4f129858
HP		 2565 return 0;
2566 }
2567 return -ENXIO;
2568}
2569
c05c4186
JF		 2570static int flic_create(struct kvm_device *dev, u32 type)
2571{
2572 if (!dev)
2573 return -EINVAL;
2574 if (dev->kvm->arch.flic)
2575 return -EINVAL;
2576 dev->kvm->arch.flic = dev;
2577 return 0;
2578}
2579
2580static void flic_destroy(struct kvm_device *dev)
2581{
2582 dev->kvm->arch.flic = NULL;
2583 kfree(dev);
2584}
2585
2586/* s390 floating irq controller (flic) */
2587struct kvm_device_ops kvm_flic_ops = {
2588 .name = "kvm-flic",
2589 .get_attr = flic_get_attr,
2590 .set_attr = flic_set_attr,
4f129858 2591 .has_attr = flic_has_attr,
c05c4186
JF		 2592 .create = flic_create,
2593 .destroy = flic_destroy,
2594};
84223598
CH		 2595
2596static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2597{
2598 unsigned long bit;
2599
2600 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2601
2602 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2603}
2604
2605static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2606 u64 addr)
2607{
2608 struct s390_map_info *map;
2609
2610 if (!adapter)
2611 return NULL;
2612
2613 list_for_each_entry(map, &adapter->maps, list) {
2614 if (map->guest_addr == addr)
2615 return map;
2616 }
2617 return NULL;
2618}
2619
2620static int adapter_indicators_set(struct kvm *kvm,
2621 struct s390_io_adapter *adapter,
2622 struct kvm_s390_adapter_int *adapter_int)
2623{
2624 unsigned long bit;
2625 int summary_set, idx;
2626 struct s390_map_info *info;
2627 void *map;
2628
2629 info = get_map_info(adapter, adapter_int->ind_addr);
2630 if (!info)
2631 return -1;
2632 map = page_address(info->page);
2633 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2634 set_bit(bit, map);
2635 idx = srcu_read_lock(&kvm->srcu);
2636 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2637 set_page_dirty_lock(info->page);
2638 info = get_map_info(adapter, adapter_int->summary_addr);
2639 if (!info) {
2640 srcu_read_unlock(&kvm->srcu, idx);
2641 return -1;
2642 }
2643 map = page_address(info->page);
2644 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2645 adapter->swap);
2646 summary_set = test_and_set_bit(bit, map);
2647 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2648 set_page_dirty_lock(info->page);
2649 srcu_read_unlock(&kvm->srcu, idx);
2650 return summary_set ? 0 : 1;
2651}
2652
2653/*
2654 * < 0 - not injected due to error
2655 * = 0 - coalesced, summary indicator already active
2656 * > 0 - injected interrupt
2657 */
2658static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2659 struct kvm *kvm, int irq_source_id, int level,
2660 bool line_status)
2661{
2662 int ret;
2663 struct s390_io_adapter *adapter;
2664
2665 /* We're only interested in the 0->1 transition. */
2666 if (!level)
2667 return 0;
2668 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2669 if (!adapter)
2670 return -1;
2671 down_read(&adapter->maps_lock);
2672 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2673 up_read(&adapter->maps_lock);
2674 if ((ret > 0) && !adapter->masked) {
a8920950 2675 ret = kvm_s390_inject_airq(kvm, adapter);
84223598
CH		 2676 if (ret == 0)
2677 ret = 1;
2678 }
2679 return ret;
2680}
2681
4d62fcc0
QH		 2682/*
2683 * Inject the machine check to the guest.
2684 */
2685void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
2686 struct mcck_volatile_info *mcck_info)
2687{
2688 struct kvm_s390_interrupt_info inti;
2689 struct kvm_s390_irq irq;
2690 struct kvm_s390_mchk_info *mchk;
2691 union mci mci;
2692 __u64 cr14 = 0; /* upper bits are not used */
3dbf0205 2693 int rc;
4d62fcc0
QH		 2694
2695 mci.val = mcck_info->mcic;
2696 if (mci.sr)
cc65450c 2697 cr14 |= CR14_RECOVERY_SUBMASK;
4d62fcc0 2698 if (mci.dg)
cc65450c 2699 cr14 |= CR14_DEGRADATION_SUBMASK;
4d62fcc0 2700 if (mci.w)
cc65450c 2701 cr14 |= CR14_WARNING_SUBMASK;
4d62fcc0
QH		 2702
2703 mchk = mci.ck ? &inti.mchk : &irq.u.mchk;
2704 mchk->cr14 = cr14;
2705 mchk->mcic = mcck_info->mcic;
2706 mchk->ext_damage_code = mcck_info->ext_damage_code;
2707 mchk->failing_storage_address = mcck_info->failing_storage_address;
2708 if (mci.ck) {
2709 /* Inject the floating machine check */
2710 inti.type = KVM_S390_MCHK;
3dbf0205 2711 rc = __inject_vm(vcpu->kvm, &inti);
4d62fcc0
QH		 2712 } else {
2713 /* Inject the machine check to specified vcpu */
2714 irq.type = KVM_S390_MCHK;
3dbf0205 2715 rc = kvm_s390_inject_vcpu(vcpu, &irq);
4d62fcc0 2716 }
3dbf0205 2717 WARN_ON_ONCE(rc);
4d62fcc0
QH		 2718}
2719
c63cf538
RK		 2720int kvm_set_routing_entry(struct kvm *kvm,
2721 struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 2722 const struct kvm_irq_routing_entry *ue)
2723{
2724 int ret;
2725
2726 switch (ue->type) {
2727 case KVM_IRQ_ROUTING_S390_ADAPTER:
2728 e->set = set_adapter_int;
2729 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2730 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2731 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2732 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2733 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2734 ret = 0;
2735 break;
2736 default:
2737 ret = -EINVAL;
2738 }
2739
2740 return ret;
2741}
2742
2743int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2744 int irq_source_id, int level, bool line_status)
2745{
2746 return -EINVAL;
2747}
816c7667
JF		 2748
2749int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2750{
2751 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2752 struct kvm_s390_irq *buf;
2753 int r = 0;
2754 int n;
2755
2756 buf = vmalloc(len);
2757 if (!buf)
2758 return -ENOMEM;
2759
2760 if (copy_from_user((void *) buf, irqstate, len)) {
2761 r = -EFAULT;
2762 goto out_free;
2763 }
2764
2765 /*
2766 * Don't allow setting the interrupt state
2767 * when there are already interrupts pending
2768 */
2769 spin_lock(&li->lock);
2770 if (li->pending_irqs) {
2771 r = -EBUSY;
2772 goto out_unlock;
2773 }
2774
2775 for (n = 0; n < len / sizeof(*buf); n++) {
2776 r = do_inject_vcpu(vcpu, &buf[n]);
2777 if (r)
2778 break;
2779 }
2780
2781out_unlock:
2782 spin_unlock(&li->lock);
2783out_free:
2784 vfree(buf);
2785
2786 return r;
2787}
2788
2789static void store_local_irq(struct kvm_s390_local_interrupt *li,
2790 struct kvm_s390_irq *irq,
2791 unsigned long irq_type)
2792{
2793 switch (irq_type) {
2794 case IRQ_PEND_MCHK_EX:
2795 case IRQ_PEND_MCHK_REP:
2796 irq->type = KVM_S390_MCHK;
2797 irq->u.mchk = li->irq.mchk;
2798 break;
2799 case IRQ_PEND_PROG:
2800 irq->type = KVM_S390_PROGRAM_INT;
2801 irq->u.pgm = li->irq.pgm;
2802 break;
2803 case IRQ_PEND_PFAULT_INIT:
2804 irq->type = KVM_S390_INT_PFAULT_INIT;
2805 irq->u.ext = li->irq.ext;
2806 break;
2807 case IRQ_PEND_EXT_EXTERNAL:
2808 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2809 irq->u.extcall = li->irq.extcall;
2810 break;
2811 case IRQ_PEND_EXT_CLOCK_COMP:
2812 irq->type = KVM_S390_INT_CLOCK_COMP;
2813 break;
2814 case IRQ_PEND_EXT_CPU_TIMER:
2815 irq->type = KVM_S390_INT_CPU_TIMER;
2816 break;
2817 case IRQ_PEND_SIGP_STOP:
2818 irq->type = KVM_S390_SIGP_STOP;
2819 irq->u.stop = li->irq.stop;
2820 break;
2821 case IRQ_PEND_RESTART:
2822 irq->type = KVM_S390_RESTART;
2823 break;
2824 case IRQ_PEND_SET_PREFIX:
2825 irq->type = KVM_S390_SIGP_SET_PREFIX;
2826 irq->u.prefix = li->irq.prefix;
2827 break;
2828 }
2829}
2830
2831int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2832{
a5bd7647 2833 int scn;
816c7667
JF		 2834 unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
2835 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2836 unsigned long pending_irqs;
2837 struct kvm_s390_irq irq;
2838 unsigned long irq_type;
2839 int cpuaddr;
2840 int n = 0;
2841
2842 spin_lock(&li->lock);
2843 pending_irqs = li->pending_irqs;
2844 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2845 sizeof(sigp_emerg_pending));
2846 spin_unlock(&li->lock);
2847
2848 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2849 memset(&irq, 0, sizeof(irq));
2850 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2851 continue;
2852 if (n + sizeof(irq) > len)
2853 return -ENOBUFS;
2854 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2855 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2856 return -EFAULT;
2857 n += sizeof(irq);
2858 }
2859
2860 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2861 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2862 memset(&irq, 0, sizeof(irq));
2863 if (n + sizeof(irq) > len)
2864 return -ENOBUFS;
2865 irq.type = KVM_S390_INT_EMERGENCY;
2866 irq.u.emerg.code = cpuaddr;
2867 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2868 return -EFAULT;
2869 n += sizeof(irq);
2870 }
2871 }
2872
a5bd7647 2873 if (sca_ext_call_pending(vcpu, &scn)) {
816c7667
JF		 2874 if (n + sizeof(irq) > len)
2875 return -ENOBUFS;
2876 memset(&irq, 0, sizeof(irq));
2877 irq.type = KVM_S390_INT_EXTERNAL_CALL;
a5bd7647 2878 irq.u.extcall.code = scn;
816c7667
JF		 2879 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2880 return -EFAULT;
2881 n += sizeof(irq);
2882 }
2883
2884 return n;
2885}
d7c5cb01
MM		 2886
2887void kvm_s390_gisa_clear(struct kvm *kvm)
2888{
2889 if (kvm->arch.gisa) {
2890 memset(kvm->arch.gisa, 0, sizeof(struct kvm_s390_gisa));
2891 kvm->arch.gisa->next_alert = (u32)(u64)kvm->arch.gisa;
2892 VM_EVENT(kvm, 3, "gisa 0x%pK cleared", kvm->arch.gisa);
2893 }
2894}
2895
2896void kvm_s390_gisa_init(struct kvm *kvm)
2897{
4b9f9525 2898 if (css_general_characteristics.aiv) {
f180bfda
MM		 2899 kvm->arch.gisa = &kvm->arch.sie_page2->gisa;
2900 VM_EVENT(kvm, 3, "gisa 0x%pK initialized", kvm->arch.gisa);
2901 kvm_s390_gisa_clear(kvm);
2902 }
d7c5cb01
MM		 2903}
2904
2905void kvm_s390_gisa_destroy(struct kvm *kvm)
2906{
2907 if (!kvm->arch.gisa)
2908 return;
2909 kvm->arch.gisa = NULL;
2910}
Linux 6.x block layer and io_uring tree(s)