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KVM: s390: add vcpu stat counters for many instruction
[mirror_ubuntu-kernels.git] / arch / s390 / kvm / interrupt.c
CommitLineData
d809aa23 1// SPDX-License-Identifier: GPL-2.0
ba5c1e9b 2/*
a53c8fab 3 * handling kvm guest interrupts
ba5c1e9b 4 *
33b412ac 5 * Copyright IBM Corp. 2008, 2015
ba5c1e9b 6 *
ba5c1e9b
CO		 7 * Author(s): Carsten Otte <cotte@de.ibm.com>
8 */
9
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
2c1bb2be
DH		 39 if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND))
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 }
104 atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
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;
a9f6c9a9 114 atomic_andnot(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
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{
60417fcc 172 if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm))
b4aec925
DH		 173 return 0;
174 return ckc_interrupts_enabled(vcpu);
175}
176
177static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
178{
179 return !psw_extint_disabled(vcpu) &&
180 (vcpu->arch.sie_block->gcr[0] & 0x400ul);
181}
182
183static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
184{
4287f247
DH		 185 if (!cpu_timer_interrupts_enabled(vcpu))
186 return 0;
187 return kvm_s390_get_cpu_timer(vcpu) >> 63;
b4aec925
DH		 188}
189
6d3da241 190static inline int is_ioirq(unsigned long irq_type)
79fd50c6 191{
6d3da241
JF		 192 return ((irq_type >= IRQ_PEND_IO_ISC_0) &&
193 (irq_type <= IRQ_PEND_IO_ISC_7));
194}
79fd50c6 195
6d3da241
JF		 196static uint64_t isc_to_isc_bits(int isc)
197{
79fd50c6
CH		 198 return (0x80 >> isc) << 24;
199}
200
6d3da241 201static inline u8 int_word_to_isc(u32 int_word)
ba5c1e9b 202{
6d3da241
JF		 203 return (int_word & 0x38000000) >> 27;
204}
205
5f94c58e 206static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
6d3da241 207{
5f94c58e
DH		 208 return vcpu->kvm->arch.float_int.pending_irqs |
209 vcpu->arch.local_int.pending_irqs;
383d0b05
JF		 210}
211
ee739f4b
MM		 212static inline int isc_to_irq_type(unsigned long isc)
213{
214 return IRQ_PEND_IO_ISC_0 + isc;
215}
216
217static inline int irq_type_to_isc(unsigned long irq_type)
218{
219 return irq_type - IRQ_PEND_IO_ISC_0;
220}
221
6d3da241
JF		 222static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
223 unsigned long active_mask)
224{
225 int i;
226
227 for (i = 0; i <= MAX_ISC; i++)
228 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
ee739f4b 229 active_mask &= ~(1UL << (isc_to_irq_type(i)));
6d3da241
JF		 230
231 return active_mask;
232}
233
234static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
383d0b05 235{
6d3da241
JF		 236 unsigned long active_mask;
237
5f94c58e 238 active_mask = pending_irqs(vcpu);
ffeca0ae
JF		 239 if (!active_mask)
240 return 0;
383d0b05
JF		 241
242 if (psw_extint_disabled(vcpu))
243 active_mask &= ~IRQ_PEND_EXT_MASK;
6d3da241
JF		 244 if (psw_ioint_disabled(vcpu))
245 active_mask &= ~IRQ_PEND_IO_MASK;
246 else
247 active_mask = disable_iscs(vcpu, active_mask);
383d0b05
JF		 248 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
249 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
250 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
251 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
252 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
253 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
254 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
255 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
6d3da241
JF		 256 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
257 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
383d0b05
JF		 258 if (psw_mchk_disabled(vcpu))
259 active_mask &= ~IRQ_PEND_MCHK_MASK;
4d62fcc0
QH		 260 /*
261 * Check both floating and local interrupt's cr14 because
262 * bit IRQ_PEND_MCHK_REP could be set in both cases.
263 */
6d3da241 264 if (!(vcpu->arch.sie_block->gcr[14] &
4d62fcc0
QH		 265 (vcpu->kvm->arch.float_int.mchk.cr14 |
266 vcpu->arch.local_int.irq.mchk.cr14)))
6d3da241 267 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
383d0b05 268
6cddd432
DH		 269 /*
270 * STOP irqs will never be actively delivered. They are triggered via
271 * intercept requests and cleared when the stop intercept is performed.
272 */
273 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
274
383d0b05
JF		 275 return active_mask;
276}
277
ba5c1e9b
CO		 278static void __set_cpu_idle(struct kvm_vcpu *vcpu)
279{
805de8f4 280 atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
a9f6c9a9 281 set_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
ba5c1e9b
CO		 282}
283
284static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
285{
805de8f4 286 atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
a9f6c9a9 287 clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
ba5c1e9b
CO		 288}
289
290static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
291{
805de8f4
PZ		 292 atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
293 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 294 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 295 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
296
297 if (guestdbg_enabled(vcpu)) {
298 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
299 LCTL_CR10 | LCTL_CR11);
300 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
301 }
ba5c1e9b
CO		 302}
303
304static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
305{
805de8f4 306 atomic_or(flag, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 307}
308
6d3da241
JF		 309static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
310{
5f94c58e 311 if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK))
6d3da241
JF		 312 return;
313 else if (psw_ioint_disabled(vcpu))
314 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
315 else
316 vcpu->arch.sie_block->lctl |= LCTL_CR6;
317}
318
383d0b05
JF		 319static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
320{
5f94c58e 321 if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
383d0b05
JF		 322 return;
323 if (psw_extint_disabled(vcpu))
324 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
325 else
326 vcpu->arch.sie_block->lctl |= LCTL_CR0;
327}
328
329static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
330{
5f94c58e 331 if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
383d0b05
JF		 332 return;
333 if (psw_mchk_disabled(vcpu))
334 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
335 else
336 vcpu->arch.sie_block->lctl |= LCTL_CR14;
337}
338
6cddd432
DH		 339static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
340{
341 if (kvm_s390_is_stop_irq_pending(vcpu))
342 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
343}
344
6d3da241
JF		 345/* Set interception request for non-deliverable interrupts */
346static void set_intercept_indicators(struct kvm_vcpu *vcpu)
383d0b05 347{
6d3da241 348 set_intercept_indicators_io(vcpu);
383d0b05
JF		 349 set_intercept_indicators_ext(vcpu);
350 set_intercept_indicators_mchk(vcpu);
6cddd432 351 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 352}
353
0fb97abe
JF		 354static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
355{
383d0b05 356 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 357 int rc;
358
359 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
360 0, 0);
361
362 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
363 (u16 *)__LC_EXT_INT_CODE);
467fc298 364 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 365 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
366 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
367 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
368 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 369 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 370 return rc ? -EFAULT : 0;
0fb97abe
JF		 371}
372
373static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
374{
383d0b05 375 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 376 int rc;
377
378 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
379 0, 0);
380
381 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
382 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 383 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 384 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
385 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
386 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
387 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 388 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 389 return rc ? -EFAULT : 0;
0fb97abe
JF		 390}
391
383d0b05 392static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 393{
383d0b05
JF		 394 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
395 struct kvm_s390_ext_info ext;
0fb97abe
JF		 396 int rc;
397
383d0b05
JF		 398 spin_lock(&li->lock);
399 ext = li->irq.ext;
400 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
401 li->irq.ext.ext_params2 = 0;
402 spin_unlock(&li->lock);
403
3f24ba15
CB		 404 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
405 ext.ext_params2);
0fb97abe
JF		 406 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
407 KVM_S390_INT_PFAULT_INIT,
383d0b05 408 0, ext.ext_params2);
0fb97abe
JF		 409
410 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
411 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
412 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
413 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
414 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
415 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 416 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 417 return rc ? -EFAULT : 0;
0fb97abe
JF		 418}
419
d6404ded
DH		 420static int __write_machine_check(struct kvm_vcpu *vcpu,
421 struct kvm_s390_mchk_info *mchk)
422{
423 unsigned long ext_sa_addr;
4e0b1ab7 424 unsigned long lc;
0319dae6 425 freg_t fprs[NUM_FPRS];
ff5dc149 426 union mci mci;
d6404ded
DH		 427 int rc;
428
ff5dc149 429 mci.val = mchk->mcic;
31d8b8d4 430 /* take care of lazy register loading */
0319dae6
DH		 431 save_fpu_regs();
432 save_access_regs(vcpu->run->s.regs.acrs);
80248559
CB		 433 if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
434 save_gs_cb(current->thread.gs_cb);
0319dae6 435
d6404ded 436 /* Extended save area */
916cda1a
MS		 437 rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,
438 sizeof(unsigned long));
4e0b1ab7
FZ		 439 /* Only bits 0 through 63-LC are used for address formation */
440 lc = ext_sa_addr & MCESA_LC_MASK;
441 if (test_kvm_facility(vcpu->kvm, 133)) {
442 switch (lc) {
443 case 0:
444 case 10:
445 ext_sa_addr &= ~0x3ffUL;
446 break;
447 case 11:
448 ext_sa_addr &= ~0x7ffUL;
449 break;
450 case 12:
451 ext_sa_addr &= ~0xfffUL;
452 break;
453 default:
454 ext_sa_addr = 0;
455 break;
456 }
457 } else {
458 ext_sa_addr &= ~0x3ffUL;
459 }
460
ff5dc149
DH		 461 if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
462 if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
463 512))
464 mci.vr = 0;
465 } else {
466 mci.vr = 0;
467 }
4e0b1ab7
FZ		 468 if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133)
469 && (lc == 11 || lc == 12)) {
470 if (write_guest_abs(vcpu, ext_sa_addr + 1024,
471 &vcpu->run->s.regs.gscb, 32))
472 mci.gs = 0;
473 } else {
474 mci.gs = 0;
475 }
d6404ded
DH		 476
477 /* General interruption information */
0319dae6 478 rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
d6404ded
DH		 479 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
480 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
481 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
482 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ff5dc149 483 rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);
d6404ded
DH		 484
485 /* Register-save areas */
0319dae6
DH		 486 if (MACHINE_HAS_VX) {
487 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
488 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
489 } else {
490 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA,
491 vcpu->run->s.regs.fprs, 128);
492 }
493 rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA,
494 vcpu->run->s.regs.gprs, 128);
495 rc |= put_guest_lc(vcpu, current->thread.fpu.fpc,
496 (u32 __user *) __LC_FP_CREG_SAVE_AREA);
497 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr,
498 (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA);
499 rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu),
500 (u64 __user *) __LC_CPU_TIMER_SAVE_AREA);
501 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8,
502 (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA);
503 rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA,
504 &vcpu->run->s.regs.acrs, 64);
505 rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA,
506 &vcpu->arch.sie_block->gcr, 128);
d6404ded
DH		 507
508 /* Extended interruption information */
8953fb08
DH		 509 rc |= put_guest_lc(vcpu, mchk->ext_damage_code,
510 (u32 __user *) __LC_EXT_DAMAGE_CODE);
d6404ded
DH		 511 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
512 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
513 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout,
514 sizeof(mchk->fixed_logout));
515 return rc ? -EFAULT : 0;
516}
517
383d0b05 518static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 519{
6d3da241 520 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
383d0b05 521 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
6d3da241 522 struct kvm_s390_mchk_info mchk = {};
6d3da241
JF		 523 int deliver = 0;
524 int rc = 0;
0fb97abe 525
6d3da241 526 spin_lock(&fi->lock);
383d0b05 527 spin_lock(&li->lock);
6d3da241
JF		 528 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
529 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
530 /*
531 * If there was an exigent machine check pending, then any
532 * repressible machine checks that might have been pending
533 * are indicated along with it, so always clear bits for
534 * repressible and exigent interrupts
535 */
536 mchk = li->irq.mchk;
537 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
538 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
539 memset(&li->irq.mchk, 0, sizeof(mchk));
540 deliver = 1;
541 }
383d0b05 542 /*
6d3da241
JF		 543 * We indicate floating repressible conditions along with
544 * other pending conditions. Channel Report Pending and Channel
545 * Subsystem damage are the only two and and are indicated by
546 * bits in mcic and masked in cr14.
383d0b05 547 */
6d3da241
JF		 548 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
549 mchk.mcic |= fi->mchk.mcic;
550 mchk.cr14 |= fi->mchk.cr14;
551 memset(&fi->mchk, 0, sizeof(mchk));
552 deliver = 1;
553 }
383d0b05 554 spin_unlock(&li->lock);
6d3da241 555 spin_unlock(&fi->lock);
383d0b05 556
6d3da241 557 if (deliver) {
3f24ba15 558 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
6d3da241
JF		 559 mchk.mcic);
560 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
561 KVM_S390_MCHK,
562 mchk.cr14, mchk.mcic);
d6404ded 563 rc = __write_machine_check(vcpu, &mchk);
6d3da241 564 }
d6404ded 565 return rc;
0fb97abe
JF		 566}
567
568static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
569{
383d0b05 570 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 571 int rc;
572
3f24ba15 573 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
0fb97abe
JF		 574 vcpu->stat.deliver_restart_signal++;
575 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
576
577 rc = write_guest_lc(vcpu,
c667aeac 578 offsetof(struct lowcore, restart_old_psw),
0fb97abe 579 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
c667aeac 580 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw),
0fb97abe 581 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 582 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 583 return rc ? -EFAULT : 0;
0fb97abe
JF		 584}
585
383d0b05 586static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 587{
383d0b05
JF		 588 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
589 struct kvm_s390_prefix_info prefix;
590
591 spin_lock(&li->lock);
592 prefix = li->irq.prefix;
593 li->irq.prefix.address = 0;
594 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
595 spin_unlock(&li->lock);
0fb97abe 596
0fb97abe
JF		 597 vcpu->stat.deliver_prefix_signal++;
598 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
599 KVM_S390_SIGP_SET_PREFIX,
383d0b05 600 prefix.address, 0);
0fb97abe 601
383d0b05 602 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 603 return 0;
604}
605
383d0b05 606static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 607{
383d0b05 608 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 609 int rc;
383d0b05
JF		 610 int cpu_addr;
611
612 spin_lock(&li->lock);
613 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
614 clear_bit(cpu_addr, li->sigp_emerg_pending);
615 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
616 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
617 spin_unlock(&li->lock);
0fb97abe 618
3f24ba15 619 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
0fb97abe 620 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 621 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
622 cpu_addr, 0);
0fb97abe
JF		 623
624 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
625 (u16 *)__LC_EXT_INT_CODE);
383d0b05 626 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 627 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
628 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
629 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
630 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 631 return rc ? -EFAULT : 0;
0fb97abe
JF		 632}
633
383d0b05 634static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 635{
383d0b05
JF		 636 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
637 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 638 int rc;
639
383d0b05
JF		 640 spin_lock(&li->lock);
641 extcall = li->irq.extcall;
642 li->irq.extcall.code = 0;
643 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
644 spin_unlock(&li->lock);
645
3f24ba15 646 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
0fb97abe
JF		 647 vcpu->stat.deliver_external_call++;
648 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
649 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 650 extcall.code, 0);
0fb97abe
JF		 651
652 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
653 (u16 *)__LC_EXT_INT_CODE);
383d0b05 654 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 655 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
656 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
657 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
658 sizeof(psw_t));
99e20009 659 return rc ? -EFAULT : 0;
0fb97abe
JF		 660}
661
383d0b05 662static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 663{
383d0b05
JF		 664 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
665 struct kvm_s390_pgm_info pgm_info;
a9a846fd 666 int rc = 0, nullifying = false;
634790b8 667 u16 ilen;
8712836b 668
383d0b05
JF		 669 spin_lock(&li->lock);
670 pgm_info = li->irq.pgm;
671 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
672 memset(&li->irq.pgm, 0, sizeof(pgm_info));
673 spin_unlock(&li->lock);
674
634790b8 675 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
0e8bc06a
DH		 676 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
677 pgm_info.code, ilen);
0fb97abe
JF		 678 vcpu->stat.deliver_program_int++;
679 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 680 pgm_info.code, 0);
0fb97abe 681
383d0b05 682 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 683 case PGM_AFX_TRANSLATION:
684 case PGM_ASX_TRANSLATION:
685 case PGM_EX_TRANSLATION:
686 case PGM_LFX_TRANSLATION:
687 case PGM_LSTE_SEQUENCE:
688 case PGM_LSX_TRANSLATION:
689 case PGM_LX_TRANSLATION:
690 case PGM_PRIMARY_AUTHORITY:
691 case PGM_SECONDARY_AUTHORITY:
a9a846fd
TH		 692 nullifying = true;
693 /* fall through */
8712836b 694 case PGM_SPACE_SWITCH:
383d0b05 695 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 696 (u64 *)__LC_TRANS_EXC_CODE);
697 break;
698 case PGM_ALEN_TRANSLATION:
699 case PGM_ALE_SEQUENCE:
700 case PGM_ASTE_INSTANCE:
701 case PGM_ASTE_SEQUENCE:
702 case PGM_ASTE_VALIDITY:
703 case PGM_EXTENDED_AUTHORITY:
383d0b05 704 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 705 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 706 nullifying = true;
8712836b
DH		 707 break;
708 case PGM_ASCE_TYPE:
709 case PGM_PAGE_TRANSLATION:
710 case PGM_REGION_FIRST_TRANS:
711 case PGM_REGION_SECOND_TRANS:
712 case PGM_REGION_THIRD_TRANS:
713 case PGM_SEGMENT_TRANSLATION:
383d0b05 714 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 715 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 716 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 717 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 718 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 719 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 720 nullifying = true;
8712836b
DH		 721 break;
722 case PGM_MONITOR:
383d0b05 723 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 724 (u16 *)__LC_MON_CLASS_NR);
383d0b05 725 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 726 (u64 *)__LC_MON_CODE);
727 break;
403c8648 728 case PGM_VECTOR_PROCESSING:
8712836b 729 case PGM_DATA:
383d0b05 730 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 731 (u32 *)__LC_DATA_EXC_CODE);
732 break;
733 case PGM_PROTECTION:
383d0b05 734 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 735 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 736 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 737 (u8 *)__LC_EXC_ACCESS_ID);
738 break;
a9a846fd
TH		 739 case PGM_STACK_FULL:
740 case PGM_STACK_EMPTY:
741 case PGM_STACK_SPECIFICATION:
742 case PGM_STACK_TYPE:
743 case PGM_STACK_OPERATION:
744 case PGM_TRACE_TABEL:
745 case PGM_CRYPTO_OPERATION:
746 nullifying = true;
747 break;
8712836b
DH		 748 }
749
383d0b05
JF		 750 if (pgm_info.code & PGM_PER) {
751 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 752 (u8 *) __LC_PER_CODE);
383d0b05 753 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 754 (u8 *)__LC_PER_ATMID);
383d0b05 755 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 756 (u64 *) __LC_PER_ADDRESS);
383d0b05 757 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 758 (u8 *) __LC_PER_ACCESS_ID);
759 }
760
eaa4f416 761 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND))
0e8bc06a 762 kvm_s390_rewind_psw(vcpu, ilen);
a9a846fd 763
0e8bc06a
DH		 764 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
765 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
2ba45968
DH		 766 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
767 (u64 *) __LC_LAST_BREAK);
383d0b05 768 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 769 (u16 *)__LC_PGM_INT_CODE);
770 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
771 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
772 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
773 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 774 return rc ? -EFAULT : 0;
0fb97abe
JF		 775}
776
6d3da241 777static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
0fb97abe 778{
6d3da241
JF		 779 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
780 struct kvm_s390_ext_info ext;
781 int rc = 0;
782
783 spin_lock(&fi->lock);
784 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
785 spin_unlock(&fi->lock);
786 return 0;
787 }
788 ext = fi->srv_signal;
789 memset(&fi->srv_signal, 0, sizeof(ext));
790 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
791 spin_unlock(&fi->lock);
0fb97abe 792
3f24ba15 793 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
6d3da241 794 ext.ext_params);
0fb97abe 795 vcpu->stat.deliver_service_signal++;
6d3da241
JF		 796 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
797 ext.ext_params, 0);
0fb97abe
JF		 798
799 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 800 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 801 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
802 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
803 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
804 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
6d3da241 805 rc |= put_guest_lc(vcpu, ext.ext_params,
0fb97abe 806 (u32 *)__LC_EXT_PARAMS);
6d3da241 807
99e20009 808 return rc ? -EFAULT : 0;
0fb97abe
JF		 809}
810
6d3da241 811static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
0fb97abe 812{
6d3da241
JF		 813 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
814 struct kvm_s390_interrupt_info *inti;
815 int rc = 0;
0fb97abe 816
6d3da241
JF		 817 spin_lock(&fi->lock);
818 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
819 struct kvm_s390_interrupt_info,
820 list);
821 if (inti) {
6d3da241
JF		 822 list_del(&inti->list);
823 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
824 }
825 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
826 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
827 spin_unlock(&fi->lock);
8712836b 828
6d3da241 829 if (inti) {
3f24ba15
CB		 830 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
831 KVM_S390_INT_PFAULT_DONE, 0,
832 inti->ext.ext_params2);
833 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
834 inti->ext.ext_params2);
835
6d3da241
JF		 836 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
837 (u16 *)__LC_EXT_INT_CODE);
838 rc |= put_guest_lc(vcpu, PFAULT_DONE,
839 (u16 *)__LC_EXT_CPU_ADDR);
840 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
841 &vcpu->arch.sie_block->gpsw,
842 sizeof(psw_t));
843 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
844 &vcpu->arch.sie_block->gpsw,
845 sizeof(psw_t));
846 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
847 (u64 *)__LC_EXT_PARAMS2);
848 kfree(inti);
849 }
99e20009 850 return rc ? -EFAULT : 0;
0fb97abe
JF		 851}
852
6d3da241 853static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
0fb97abe 854{
6d3da241
JF		 855 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
856 struct kvm_s390_interrupt_info *inti;
857 int rc = 0;
0fb97abe 858
6d3da241
JF		 859 spin_lock(&fi->lock);
860 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
861 struct kvm_s390_interrupt_info,
862 list);
863 if (inti) {
864 VCPU_EVENT(vcpu, 4,
3f24ba15 865 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
6d3da241
JF		 866 inti->ext.ext_params, inti->ext.ext_params2);
867 vcpu->stat.deliver_virtio_interrupt++;
868 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
869 inti->type,
870 inti->ext.ext_params,
871 inti->ext.ext_params2);
872 list_del(&inti->list);
873 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
874 }
875 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
876 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
877 spin_unlock(&fi->lock);
0fb97abe 878
6d3da241
JF		 879 if (inti) {
880 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
881 (u16 *)__LC_EXT_INT_CODE);
882 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
883 (u16 *)__LC_EXT_CPU_ADDR);
884 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
885 &vcpu->arch.sie_block->gpsw,
886 sizeof(psw_t));
887 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
888 &vcpu->arch.sie_block->gpsw,
889 sizeof(psw_t));
890 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
891 (u32 *)__LC_EXT_PARAMS);
892 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
893 (u64 *)__LC_EXT_PARAMS2);
894 kfree(inti);
895 }
99e20009 896 return rc ? -EFAULT : 0;
0fb97abe
JF		 897}
898
899static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
6d3da241 900 unsigned long irq_type)
0fb97abe 901{
6d3da241
JF		 902 struct list_head *isc_list;
903 struct kvm_s390_float_interrupt *fi;
904 struct kvm_s390_interrupt_info *inti = NULL;
905 int rc = 0;
0fb97abe 906
6d3da241 907 fi = &vcpu->kvm->arch.float_int;
8712836b 908
6d3da241 909 spin_lock(&fi->lock);
ee739f4b 910 isc_list = &fi->lists[irq_type_to_isc(irq_type)];
6d3da241
JF		 911 inti = list_first_entry_or_null(isc_list,
912 struct kvm_s390_interrupt_info,
913 list);
914 if (inti) {
dcc98ea6
CB		 915 if (inti->type & KVM_S390_INT_IO_AI_MASK)
916 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)");
917 else
918 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x",
919 inti->io.subchannel_id >> 8,
920 inti->io.subchannel_id >> 1 & 0x3,
921 inti->io.subchannel_nr);
922
6d3da241
JF		 923 vcpu->stat.deliver_io_int++;
924 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
925 inti->type,
926 ((__u32)inti->io.subchannel_id << 16) |
927 inti->io.subchannel_nr,
928 ((__u64)inti->io.io_int_parm << 32) |
929 inti->io.io_int_word);
930 list_del(&inti->list);
931 fi->counters[FIRQ_CNTR_IO] -= 1;
932 }
933 if (list_empty(isc_list))
934 clear_bit(irq_type, &fi->pending_irqs);
935 spin_unlock(&fi->lock);
936
937 if (inti) {
938 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
939 (u16 *)__LC_SUBCHANNEL_ID);
940 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
941 (u16 *)__LC_SUBCHANNEL_NR);
942 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
943 (u32 *)__LC_IO_INT_PARM);
944 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
945 (u32 *)__LC_IO_INT_WORD);
946 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
947 &vcpu->arch.sie_block->gpsw,
948 sizeof(psw_t));
949 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
950 &vcpu->arch.sie_block->gpsw,
951 sizeof(psw_t));
952 kfree(inti);
953 }
383d0b05 954
99e20009 955 return rc ? -EFAULT : 0;
383d0b05
JF		 956}
957
958typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
959
960static const deliver_irq_t deliver_irq_funcs[] = {
961 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
6d3da241 962 [IRQ_PEND_MCHK_REP] = __deliver_machine_check,
383d0b05
JF		 963 [IRQ_PEND_PROG] = __deliver_prog,
964 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
965 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
966 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
967 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
968 [IRQ_PEND_RESTART] = __deliver_restart,
383d0b05
JF		 969 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
970 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
6d3da241
JF		 971 [IRQ_PEND_EXT_SERVICE] = __deliver_service,
972 [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done,
973 [IRQ_PEND_VIRTIO] = __deliver_virtio,
383d0b05
JF		 974};
975
ea5f4969
DH		 976/* Check whether an external call is pending (deliverable or not) */
977int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 978{
ea5f4969 979 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
4953919f 980
37c5f6c8 981 if (!sclp.has_sigpif)
ea5f4969 982 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 983
a5bd7647 984 return sca_ext_call_pending(vcpu, NULL);
4953919f
DH		 985}
986
9a022067 987int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 988{
4d32ad6b
DH		 989 if (deliverable_irqs(vcpu))
990 return 1;
ba5c1e9b 991
4d32ad6b
DH		 992 if (kvm_cpu_has_pending_timer(vcpu))
993 return 1;
ba5c1e9b 994
ea5f4969 995 /* external call pending and deliverable */
4d32ad6b 996 if (kvm_s390_ext_call_pending(vcpu) &&
ea5f4969
DH		 997 !psw_extint_disabled(vcpu) &&
998 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
4d32ad6b 999 return 1;
4953919f 1000
4d32ad6b
DH		 1001 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
1002 return 1;
1003 return 0;
ba5c1e9b
CO		 1004}
1005
3d80840d
MT		 1006int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1007{
b4aec925 1008 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
3d80840d
MT		 1009}
1010
b3c17f10
DH		 1011static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
1012{
1013 u64 now, cputm, sltime = 0;
1014
1015 if (ckc_interrupts_enabled(vcpu)) {
1016 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
1017 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
1018 /* already expired or overflow? */
1019 if (!sltime || vcpu->arch.sie_block->ckc <= now)
1020 return 0;
1021 if (cpu_timer_interrupts_enabled(vcpu)) {
1022 cputm = kvm_s390_get_cpu_timer(vcpu);
1023 /* already expired? */
1024 if (cputm >> 63)
1025 return 0;
1026 return min(sltime, tod_to_ns(cputm));
1027 }
1028 } else if (cpu_timer_interrupts_enabled(vcpu)) {
1029 sltime = kvm_s390_get_cpu_timer(vcpu);
1030 /* already expired? */
1031 if (sltime >> 63)
1032 return 0;
1033 }
1034 return sltime;
1035}
1036
ba5c1e9b
CO		 1037int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
1038{
b3c17f10 1039 u64 sltime;
ba5c1e9b
CO		 1040
1041 vcpu->stat.exit_wait_state++;
ba5c1e9b 1042
0759d068 1043 /* fast path */
118b862b 1044 if (kvm_arch_vcpu_runnable(vcpu))
0759d068 1045 return 0;
e52b2af5 1046
ba5c1e9b
CO		 1047 if (psw_interrupts_disabled(vcpu)) {
1048 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 1049 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 1050 }
1051
b3c17f10
DH		 1052 if (!ckc_interrupts_enabled(vcpu) &&
1053 !cpu_timer_interrupts_enabled(vcpu)) {
ba5c1e9b 1054 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 1055 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 1056 goto no_timer;
1057 }
1058
b3c17f10
DH		 1059 sltime = __calculate_sltime(vcpu);
1060 if (!sltime)
bda343ef
DH		 1061 return 0;
1062
1063 __set_cpu_idle(vcpu);
8b0e1953 1064 hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL);
b3c17f10 1065 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
ba5c1e9b 1066no_timer:
800c1065 1067 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 1068 kvm_vcpu_block(vcpu);
ba5c1e9b 1069 __unset_cpu_idle(vcpu);
800c1065
TH		 1070 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1071
2d00f759 1072 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 1073 return 0;
1074}
1075
0e9c85a5
DH		 1076void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
1077{
3491caf2
CB		 1078 /*
1079 * We cannot move this into the if, as the CPU might be already
1080 * in kvm_vcpu_block without having the waitqueue set (polling)
1081 */
1082 vcpu->valid_wakeup = true;
72e1ad42
CB		 1083 /*
1084 * This is mostly to document, that the read in swait_active could
1085 * be moved before other stores, leading to subtle races.
1086 * All current users do not store or use an atomic like update
1087 */
1088 smp_mb__after_atomic();
8577370f 1089 if (swait_active(&vcpu->wq)) {
0e9c85a5
DH		 1090 /*
1091 * The vcpu gave up the cpu voluntarily, mark it as a good
1092 * yield-candidate.
1093 */
1094 vcpu->preempted = true;
8577370f 1095 swake_up(&vcpu->wq);
ce2e4f0b 1096 vcpu->stat.halt_wakeup++;
0e9c85a5 1097 }
adbf1698
DH		 1098 /*
1099 * The VCPU might not be sleeping but is executing the VSIE. Let's
1100 * kick it, so it leaves the SIE to process the request.
1101 */
1102 kvm_s390_vsie_kick(vcpu);
0e9c85a5
DH		 1103}
1104
ca872302
CB		 1105enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
1106{
1107 struct kvm_vcpu *vcpu;
b3c17f10 1108 u64 sltime;
ca872302
CB		 1109
1110 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
b3c17f10 1111 sltime = __calculate_sltime(vcpu);
ca872302 1112
2d00f759
DH		 1113 /*
1114 * If the monotonic clock runs faster than the tod clock we might be
1115 * woken up too early and have to go back to sleep to avoid deadlocks.
1116 */
b3c17f10 1117 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime)))
2d00f759
DH		 1118 return HRTIMER_RESTART;
1119 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 1120 return HRTIMER_NORESTART;
1121}
ba5c1e9b 1122
2ed10cc1
JF		 1123void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
1124{
1125 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 1126
4ae3c081 1127 spin_lock(&li->lock);
383d0b05
JF		 1128 li->pending_irqs = 0;
1129 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
1130 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 1131 spin_unlock(&li->lock);
4953919f 1132
a5bd7647 1133 sca_clear_ext_call(vcpu);
2ed10cc1
JF		 1134}
1135
614aeab4 1136int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 1137{
180c12fb 1138 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1139 deliver_irq_t func;
79395031 1140 int rc = 0;
383d0b05 1141 unsigned long irq_type;
6d3da241 1142 unsigned long irqs;
ba5c1e9b
CO		 1143
1144 __reset_intercept_indicators(vcpu);
ba5c1e9b 1145
383d0b05
JF		 1146 /* pending ckc conditions might have been invalidated */
1147 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
b4aec925 1148 if (ckc_irq_pending(vcpu))
383d0b05
JF		 1149 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1150
b4aec925
DH		 1151 /* pending cpu timer conditions might have been invalidated */
1152 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1153 if (cpu_timer_irq_pending(vcpu))
1154 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1155
ffeca0ae 1156 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
383d0b05 1157 /* bits are in the order of interrupt priority */
6d3da241 1158 irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT);
6d3da241
JF		 1159 if (is_ioirq(irq_type)) {
1160 rc = __deliver_io(vcpu, irq_type);
1161 } else {
1162 func = deliver_irq_funcs[irq_type];
1163 if (!func) {
1164 WARN_ON_ONCE(func == NULL);
1165 clear_bit(irq_type, &li->pending_irqs);
1166 continue;
1167 }
1168 rc = func(vcpu);
383d0b05 1169 }
ffeca0ae 1170 }
383d0b05 1171
6d3da241 1172 set_intercept_indicators(vcpu);
79395031
JF		 1173
1174 return rc;
ba5c1e9b
CO		 1175}
1176
383d0b05 1177static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1178{
1179 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1180
ed2afcfa
DH		 1181 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1182 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1183 irq->u.pgm.code, 0);
1184
634790b8
DH		 1185 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) {
1186 /* auto detection if no valid ILC was given */
1187 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK;
1188 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu);
1189 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID;
1190 }
1191
238293b1
DH		 1192 if (irq->u.pgm.code == PGM_PER) {
1193 li->irq.pgm.code |= PGM_PER;
634790b8 1194 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1195 /* only modify PER related information */
1196 li->irq.pgm.per_address = irq->u.pgm.per_address;
1197 li->irq.pgm.per_code = irq->u.pgm.per_code;
1198 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1199 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1200 } else if (!(irq->u.pgm.code & PGM_PER)) {
1201 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1202 irq->u.pgm.code;
634790b8 1203 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1204 /* only modify non-PER information */
1205 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1206 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1207 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1208 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1209 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1210 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1211 } else {
1212 li->irq.pgm = irq->u.pgm;
1213 }
9185124e 1214 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 1215 return 0;
1216}
1217
383d0b05 1218static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1219{
1220 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1221
3f24ba15
CB		 1222 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1223 irq->u.ext.ext_params2);
383d0b05
JF		 1224 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1225 irq->u.ext.ext_params,
ed2afcfa 1226 irq->u.ext.ext_params2);
383d0b05
JF		 1227
1228 li->irq.ext = irq->u.ext;
1229 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
a9f6c9a9 1230 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1231 return 0;
1232}
1233
0675d92d 1234static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1235{
1236 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1237 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1238 uint16_t src_id = irq->u.extcall.code;
0146a7b0 1239
3f24ba15 1240 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
ea5f4969 1241 src_id);
383d0b05 1242 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ed2afcfa 1243 src_id, 0);
ea5f4969
DH		 1244
1245 /* sending vcpu invalid */
152e9f65 1246 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
ea5f4969
DH		 1247 return -EINVAL;
1248
37c5f6c8 1249 if (sclp.has_sigpif)
a5bd7647 1250 return sca_inject_ext_call(vcpu, src_id);
383d0b05 1251
b938eace 1252 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
ea5f4969 1253 return -EBUSY;
383d0b05 1254 *extcall = irq->u.extcall;
a9f6c9a9 1255 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1256 return 0;
1257}
1258
383d0b05 1259static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1260{
1261 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1262 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0 1263
ed2afcfa 1264 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
556cc0da 1265 irq->u.prefix.address);
383d0b05 1266 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
ed2afcfa 1267 irq->u.prefix.address, 0);
383d0b05 1268
a3a9c59a
DH		 1269 if (!is_vcpu_stopped(vcpu))
1270 return -EBUSY;
1271
383d0b05
JF		 1272 *prefix = irq->u.prefix;
1273 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1274 return 0;
1275}
1276
6cddd432 1277#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1278static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1279{
1280 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1281 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1282 int rc = 0;
0146a7b0 1283
ed2afcfa 1284 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
383d0b05 1285
2822545f
DH		 1286 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1287 return -EINVAL;
1288
6cddd432
DH		 1289 if (is_vcpu_stopped(vcpu)) {
1290 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1291 rc = kvm_s390_store_status_unloaded(vcpu,
1292 KVM_S390_STORE_STATUS_NOADDR);
1293 return rc;
1294 }
1295
1296 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1297 return -EBUSY;
2822545f 1298 stop->flags = irq->u.stop.flags;
6cddd432 1299 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1300 return 0;
1301}
1302
1303static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1304 struct kvm_s390_irq *irq)
0146a7b0
JF		 1305{
1306 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1307
3f24ba15 1308 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
ed2afcfa 1309 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
383d0b05
JF		 1310
1311 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1312 return 0;
1313}
1314
1315static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1316 struct kvm_s390_irq *irq)
0146a7b0
JF		 1317{
1318 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1319
3f24ba15 1320 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
383d0b05
JF		 1321 irq->u.emerg.code);
1322 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
ed2afcfa 1323 irq->u.emerg.code, 0);
383d0b05 1324
b85de33a
DH		 1325 /* sending vcpu invalid */
1326 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1327 return -EINVAL;
1328
49538d12 1329 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1330 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
a9f6c9a9 1331 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1332 return 0;
1333}
1334
383d0b05 1335static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1336{
1337 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1338 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0 1339
3f24ba15 1340 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
556cc0da 1341 irq->u.mchk.mcic);
383d0b05 1342 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
ed2afcfa 1343 irq->u.mchk.mcic);
383d0b05
JF		 1344
1345 /*
fc2020cf
JF		 1346 * Because repressible machine checks can be indicated along with
1347 * exigent machine checks (PoP, Chapter 11, Interruption action)
1348 * we need to combine cr14, mcic and external damage code.
1349 * Failing storage address and the logout area should not be or'ed
1350 * together, we just indicate the last occurrence of the corresponding
1351 * machine check
383d0b05 1352 */
fc2020cf 1353 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1354 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1355 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1356 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1357 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1358 sizeof(mchk->fixed_logout));
383d0b05
JF		 1359 if (mchk->mcic & MCHK_EX_MASK)
1360 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1361 else if (mchk->mcic & MCHK_REP_MASK)
1362 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1363 return 0;
1364}
1365
383d0b05 1366static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1367{
1368 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1369
3f24ba15 1370 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
383d0b05 1371 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
ed2afcfa 1372 0, 0);
383d0b05
JF		 1373
1374 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
a9f6c9a9 1375 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
0146a7b0
JF		 1376 return 0;
1377}
1378
383d0b05 1379static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1380{
1381 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1382
3f24ba15 1383 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
383d0b05 1384 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
ed2afcfa 1385 0, 0);
383d0b05
JF		 1386
1387 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
a9f6c9a9 1388 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
ba5c1e9b
CO		 1389 return 0;
1390}
1391
6d3da241
JF		 1392static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1393 int isc, u32 schid)
1394{
1395 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1396 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1397 struct kvm_s390_interrupt_info *iter;
1398 u16 id = (schid & 0xffff0000U) >> 16;
1399 u16 nr = schid & 0x0000ffffU;
1400
1401 spin_lock(&fi->lock);
1402 list_for_each_entry(iter, isc_list, list) {
1403 if (schid && (id != iter->io.subchannel_id ||
1404 nr != iter->io.subchannel_nr))
1405 continue;
1406 /* found an appropriate entry */
1407 list_del_init(&iter->list);
1408 fi->counters[FIRQ_CNTR_IO] -= 1;
1409 if (list_empty(isc_list))
ee739f4b 1410 clear_bit(isc_to_irq_type(isc), &fi->pending_irqs);
6d3da241
JF		 1411 spin_unlock(&fi->lock);
1412 return iter;
1413 }
1414 spin_unlock(&fi->lock);
1415 return NULL;
1416}
383d0b05 1417
6d3da241
JF		 1418/*
1419 * Dequeue and return an I/O interrupt matching any of the interruption
1420 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
1421 */
fa6b7fe9 1422struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241
JF		 1423 u64 isc_mask, u32 schid)
1424{
1425 struct kvm_s390_interrupt_info *inti = NULL;
1426 int isc;
1427
1428 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1429 if (isc_mask & isc_to_isc_bits(isc))
1430 inti = get_io_int(kvm, isc, schid);
1431 }
1432 return inti;
1433}
1434
1435#define SCCB_MASK 0xFFFFFFF8
1436#define SCCB_EVENT_PENDING 0x3
1437
1438static int __inject_service(struct kvm *kvm,
1439 struct kvm_s390_interrupt_info *inti)
1440{
1441 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1442
1443 spin_lock(&fi->lock);
1444 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1445 /*
1446 * Early versions of the QEMU s390 bios will inject several
1447 * service interrupts after another without handling a
1448 * condition code indicating busy.
1449 * We will silently ignore those superfluous sccb values.
1450 * A future version of QEMU will take care of serialization
1451 * of servc requests
1452 */
1453 if (fi->srv_signal.ext_params & SCCB_MASK)
1454 goto out;
1455 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1456 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1457out:
1458 spin_unlock(&fi->lock);
1459 kfree(inti);
1460 return 0;
1461}
1462
1463static int __inject_virtio(struct kvm *kvm,
1464 struct kvm_s390_interrupt_info *inti)
1465{
1466 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1467
1468 spin_lock(&fi->lock);
1469 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1470 spin_unlock(&fi->lock);
1471 return -EBUSY;
1472 }
1473 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1474 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1475 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1476 spin_unlock(&fi->lock);
1477 return 0;
1478}
1479
1480static int __inject_pfault_done(struct kvm *kvm,
1481 struct kvm_s390_interrupt_info *inti)
1482{
1483 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1484
1485 spin_lock(&fi->lock);
1486 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1487 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1488 spin_unlock(&fi->lock);
1489 return -EBUSY;
1490 }
1491 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1492 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1493 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1494 spin_unlock(&fi->lock);
1495 return 0;
1496}
1497
1498#define CR_PENDING_SUBCLASS 28
1499static int __inject_float_mchk(struct kvm *kvm,
1500 struct kvm_s390_interrupt_info *inti)
1501{
1502 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1503
1504 spin_lock(&fi->lock);
1505 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1506 fi->mchk.mcic |= inti->mchk.mcic;
1507 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1508 spin_unlock(&fi->lock);
1509 kfree(inti);
1510 return 0;
1511}
1512
1513static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
fa6b7fe9
CH		 1514{
1515 struct kvm_s390_float_interrupt *fi;
6d3da241
JF		 1516 struct list_head *list;
1517 int isc;
fa6b7fe9 1518
fa6b7fe9
CH		 1519 fi = &kvm->arch.float_int;
1520 spin_lock(&fi->lock);
6d3da241
JF		 1521 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1522 spin_unlock(&fi->lock);
1523 return -EBUSY;
a91b8ebe 1524 }
6d3da241
JF		 1525 fi->counters[FIRQ_CNTR_IO] += 1;
1526
dcc98ea6
CB		 1527 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1528 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)");
1529 else
1530 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x",
1531 inti->io.subchannel_id >> 8,
1532 inti->io.subchannel_id >> 1 & 0x3,
1533 inti->io.subchannel_nr);
6d3da241
JF		 1534 isc = int_word_to_isc(inti->io.io_int_word);
1535 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1536 list_add_tail(&inti->list, list);
ee739f4b 1537 set_bit(isc_to_irq_type(isc), &fi->pending_irqs);
fa6b7fe9 1538 spin_unlock(&fi->lock);
6d3da241 1539 return 0;
fa6b7fe9 1540}
ba5c1e9b 1541
96e0ed23
DH		 1542/*
1543 * Find a destination VCPU for a floating irq and kick it.
1544 */
1545static void __floating_irq_kick(struct kvm *kvm, u64 type)
ba5c1e9b 1546{
96e0ed23 1547 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
96e0ed23
DH		 1548 struct kvm_vcpu *dst_vcpu;
1549 int sigcpu, online_vcpus, nr_tries = 0;
1550
1551 online_vcpus = atomic_read(&kvm->online_vcpus);
1552 if (!online_vcpus)
1553 return;
1554
1555 /* find idle VCPUs first, then round robin */
1556 sigcpu = find_first_bit(fi->idle_mask, online_vcpus);
1557 if (sigcpu == online_vcpus) {
1558 do {
1559 sigcpu = fi->next_rr_cpu;
1560 fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus;
1561 /* avoid endless loops if all vcpus are stopped */
1562 if (nr_tries++ >= online_vcpus)
1563 return;
1564 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1565 }
1566 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1567
1568 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
96e0ed23
DH		 1569 switch (type) {
1570 case KVM_S390_MCHK:
a9f6c9a9 1571 __set_cpuflag(dst_vcpu, CPUSTAT_STOP_INT);
96e0ed23
DH		 1572 break;
1573 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
a9f6c9a9 1574 __set_cpuflag(dst_vcpu, CPUSTAT_IO_INT);
96e0ed23
DH		 1575 break;
1576 default:
a9f6c9a9 1577 __set_cpuflag(dst_vcpu, CPUSTAT_EXT_INT);
96e0ed23
DH		 1578 break;
1579 }
96e0ed23
DH		 1580 kvm_s390_vcpu_wakeup(dst_vcpu);
1581}
1582
1583static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1584{
6d3da241
JF		 1585 u64 type = READ_ONCE(inti->type);
1586 int rc;
ba5c1e9b 1587
6d3da241
JF		 1588 switch (type) {
1589 case KVM_S390_MCHK:
1590 rc = __inject_float_mchk(kvm, inti);
1591 break;
1592 case KVM_S390_INT_VIRTIO:
1593 rc = __inject_virtio(kvm, inti);
1594 break;
1595 case KVM_S390_INT_SERVICE:
1596 rc = __inject_service(kvm, inti);
1597 break;
1598 case KVM_S390_INT_PFAULT_DONE:
1599 rc = __inject_pfault_done(kvm, inti);
1600 break;
1601 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1602 rc = __inject_io(kvm, inti);
1603 break;
1604 default:
a91b8ebe 1605 rc = -EINVAL;
c05c4186 1606 }
6d3da241
JF		 1607 if (rc)
1608 return rc;
1609
96e0ed23 1610 __floating_irq_kick(kvm, type);
6d3da241 1611 return 0;
c05c4186
JF		 1612}
1613
1614int kvm_s390_inject_vm(struct kvm *kvm,
1615 struct kvm_s390_interrupt *s390int)
1616{
1617 struct kvm_s390_interrupt_info *inti;
428d53be 1618 int rc;
c05c4186 1619
ba5c1e9b
CO		 1620 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1621 if (!inti)
1622 return -ENOMEM;
1623
c05c4186
JF		 1624 inti->type = s390int->type;
1625 switch (inti->type) {
ba5c1e9b 1626 case KVM_S390_INT_VIRTIO:
33e19115 1627 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1628 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1629 inti->ext.ext_params = s390int->parm;
1630 inti->ext.ext_params2 = s390int->parm64;
1631 break;
1632 case KVM_S390_INT_SERVICE:
3f24ba15 1633 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1634 inti->ext.ext_params = s390int->parm;
1635 break;
3c038e6b 1636 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 1637 inti->ext.ext_params2 = s390int->parm64;
1638 break;
48a3e950 1639 case KVM_S390_MCHK:
3f24ba15 1640 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
48a3e950 1641 s390int->parm64);
48a3e950
CH		 1642 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1643 inti->mchk.mcic = s390int->parm64;
1644 break;
d8346b7d 1645 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
d8346b7d
CH		 1646 inti->io.subchannel_id = s390int->parm >> 16;
1647 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1648 inti->io.io_int_parm = s390int->parm64 >> 32;
1649 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1650 break;
ba5c1e9b
CO		 1651 default:
1652 kfree(inti);
1653 return -EINVAL;
1654 }
ade38c31
CH		 1655 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1656 2);
ba5c1e9b 1657
428d53be
DH		 1658 rc = __inject_vm(kvm, inti);
1659 if (rc)
1660 kfree(inti);
1661 return rc;
ba5c1e9b
CO		 1662}
1663
15462e37 1664int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 1665 struct kvm_s390_interrupt_info *inti)
1666{
15462e37 1667 return __inject_vm(kvm, inti);
2f32d4ea
CH		 1668}
1669
383d0b05
JF		 1670int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1671 struct kvm_s390_irq *irq)
1672{
1673 irq->type = s390int->type;
1674 switch (irq->type) {
1675 case KVM_S390_PROGRAM_INT:
1676 if (s390int->parm & 0xffff0000)
1677 return -EINVAL;
1678 irq->u.pgm.code = s390int->parm;
1679 break;
1680 case KVM_S390_SIGP_SET_PREFIX:
1681 irq->u.prefix.address = s390int->parm;
1682 break;
2822545f
DH		 1683 case KVM_S390_SIGP_STOP:
1684 irq->u.stop.flags = s390int->parm;
1685 break;
383d0b05 1686 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 1687 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1688 return -EINVAL;
1689 irq->u.extcall.code = s390int->parm;
1690 break;
1691 case KVM_S390_INT_EMERGENCY:
94d1f564 1692 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1693 return -EINVAL;
1694 irq->u.emerg.code = s390int->parm;
1695 break;
1696 case KVM_S390_MCHK:
1697 irq->u.mchk.mcic = s390int->parm64;
1698 break;
1699 }
1700 return 0;
1701}
1702
6cddd432
DH		 1703int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1704{
1705 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1706
1707 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1708}
1709
1710void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1711{
1712 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1713
1714 spin_lock(&li->lock);
1715 li->irq.stop.flags = 0;
1716 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1717 spin_unlock(&li->lock);
1718}
1719
79e87a10 1720static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 1721{
0146a7b0 1722 int rc;
ba5c1e9b 1723
383d0b05 1724 switch (irq->type) {
ba5c1e9b 1725 case KVM_S390_PROGRAM_INT:
383d0b05 1726 rc = __inject_prog(vcpu, irq);
ba5c1e9b 1727 break;
b7e6e4d3 1728 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 1729 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 1730 break;
ba5c1e9b 1731 case KVM_S390_SIGP_STOP:
383d0b05 1732 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 1733 break;
ba5c1e9b 1734 case KVM_S390_RESTART:
383d0b05 1735 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 1736 break;
e029ae5b 1737 case KVM_S390_INT_CLOCK_COMP:
383d0b05 1738 rc = __inject_ckc(vcpu);
0146a7b0 1739 break;
e029ae5b 1740 case KVM_S390_INT_CPU_TIMER:
383d0b05 1741 rc = __inject_cpu_timer(vcpu);
82a12737 1742 break;
7697e71f 1743 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 1744 rc = __inject_extcall(vcpu, irq);
82a12737 1745 break;
ba5c1e9b 1746 case KVM_S390_INT_EMERGENCY:
383d0b05 1747 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 1748 break;
48a3e950 1749 case KVM_S390_MCHK:
383d0b05 1750 rc = __inject_mchk(vcpu, irq);
48a3e950 1751 break;
3c038e6b 1752 case KVM_S390_INT_PFAULT_INIT:
383d0b05 1753 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 1754 break;
ba5c1e9b
CO		 1755 case KVM_S390_INT_VIRTIO:
1756 case KVM_S390_INT_SERVICE:
d8346b7d 1757 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 1758 default:
0146a7b0 1759 rc = -EINVAL;
ba5c1e9b 1760 }
79e87a10
JF		 1761
1762 return rc;
1763}
1764
1765int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1766{
1767 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1768 int rc;
1769
1770 spin_lock(&li->lock);
1771 rc = do_inject_vcpu(vcpu, irq);
4ae3c081 1772 spin_unlock(&li->lock);
0146a7b0
JF		 1773 if (!rc)
1774 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 1775 return rc;
ba5c1e9b 1776}
c05c4186 1777
6d3da241 1778static inline void clear_irq_list(struct list_head *_list)
c05c4186 1779{
6d3da241 1780 struct kvm_s390_interrupt_info *inti, *n;
c05c4186 1781
6d3da241 1782 list_for_each_entry_safe(inti, n, _list, list) {
c05c4186
JF		 1783 list_del(&inti->list);
1784 kfree(inti);
1785 }
c05c4186
JF		 1786}
1787
94aa033e
JF		 1788static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
1789 struct kvm_s390_irq *irq)
c05c4186 1790{
94aa033e 1791 irq->type = inti->type;
c05c4186 1792 switch (inti->type) {
3c038e6b
DD		 1793 case KVM_S390_INT_PFAULT_INIT:
1794 case KVM_S390_INT_PFAULT_DONE:
c05c4186 1795 case KVM_S390_INT_VIRTIO:
94aa033e 1796 irq->u.ext = inti->ext;
c05c4186
JF		 1797 break;
1798 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 1799 irq->u.io = inti->io;
c05c4186 1800 break;
c05c4186 1801 }
c05c4186
JF		 1802}
1803
6d3da241
JF		 1804void kvm_s390_clear_float_irqs(struct kvm *kvm)
1805{
1806 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1807 int i;
1808
1809 spin_lock(&fi->lock);
f2ae45ed
JF		 1810 fi->pending_irqs = 0;
1811 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
1812 memset(&fi->mchk, 0, sizeof(fi->mchk));
6d3da241
JF		 1813 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1814 clear_irq_list(&fi->lists[i]);
1815 for (i = 0; i < FIRQ_MAX_COUNT; i++)
1816 fi->counters[i] = 0;
1817 spin_unlock(&fi->lock);
1818};
1819
94aa033e 1820static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186
JF		 1821{
1822 struct kvm_s390_interrupt_info *inti;
1823 struct kvm_s390_float_interrupt *fi;
94aa033e 1824 struct kvm_s390_irq *buf;
6d3da241 1825 struct kvm_s390_irq *irq;
94aa033e 1826 int max_irqs;
c05c4186
JF		 1827 int ret = 0;
1828 int n = 0;
6d3da241 1829 int i;
c05c4186 1830
94aa033e
JF		 1831 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
1832 return -EINVAL;
1833
1834 /*
1835 * We are already using -ENOMEM to signal
1836 * userspace it may retry with a bigger buffer,
1837 * so we need to use something else for this case
1838 */
1839 buf = vzalloc(len);
1840 if (!buf)
1841 return -ENOBUFS;
1842
1843 max_irqs = len / sizeof(struct kvm_s390_irq);
1844
c05c4186
JF		 1845 fi = &kvm->arch.float_int;
1846 spin_lock(&fi->lock);
6d3da241
JF		 1847 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
1848 list_for_each_entry(inti, &fi->lists[i], list) {
1849 if (n == max_irqs) {
1850 /* signal userspace to try again */
1851 ret = -ENOMEM;
1852 goto out;
1853 }
1854 inti_to_irq(inti, &buf[n]);
1855 n++;
1856 }
1857 }
1858 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
94aa033e 1859 if (n == max_irqs) {
c05c4186
JF		 1860 /* signal userspace to try again */
1861 ret = -ENOMEM;
6d3da241 1862 goto out;
c05c4186 1863 }
6d3da241
JF		 1864 irq = (struct kvm_s390_irq *) &buf[n];
1865 irq->type = KVM_S390_INT_SERVICE;
1866 irq->u.ext = fi->srv_signal;
c05c4186
JF		 1867 n++;
1868 }
6d3da241
JF		 1869 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
1870 if (n == max_irqs) {
1871 /* signal userspace to try again */
1872 ret = -ENOMEM;
1873 goto out;
1874 }
1875 irq = (struct kvm_s390_irq *) &buf[n];
1876 irq->type = KVM_S390_MCHK;
1877 irq->u.mchk = fi->mchk;
1878 n++;
1879}
1880
1881out:
c05c4186 1882 spin_unlock(&fi->lock);
94aa033e
JF		 1883 if (!ret && n > 0) {
1884 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
1885 ret = -EFAULT;
1886 }
1887 vfree(buf);
c05c4186
JF		 1888
1889 return ret < 0 ? ret : n;
1890}
1891
2c1a48f2
YMZ		 1892static int flic_ais_mode_get_all(struct kvm *kvm, struct kvm_device_attr *attr)
1893{
1894 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1895 struct kvm_s390_ais_all ais;
1896
1897 if (attr->attr < sizeof(ais))
1898 return -EINVAL;
1899
1900 if (!test_kvm_facility(kvm, 72))
1901 return -ENOTSUPP;
1902
1903 mutex_lock(&fi->ais_lock);
1904 ais.simm = fi->simm;
1905 ais.nimm = fi->nimm;
1906 mutex_unlock(&fi->ais_lock);
1907
1908 if (copy_to_user((void __user *)attr->addr, &ais, sizeof(ais)))
1909 return -EFAULT;
1910
1911 return 0;
1912}
1913
c05c4186
JF		 1914static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1915{
1916 int r;
1917
1918 switch (attr->group) {
1919 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 1920 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 1921 attr->attr);
1922 break;
2c1a48f2
YMZ		 1923 case KVM_DEV_FLIC_AISM_ALL:
1924 r = flic_ais_mode_get_all(dev->kvm, attr);
1925 break;
c05c4186
JF		 1926 default:
1927 r = -EINVAL;
1928 }
1929
1930 return r;
1931}
1932
1933static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1934 u64 addr)
1935{
1936 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1937 void *target = NULL;
1938 void __user *source;
1939 u64 size;
1940
1941 if (get_user(inti->type, (u64 __user *)addr))
1942 return -EFAULT;
1943
1944 switch (inti->type) {
3c038e6b
DD		 1945 case KVM_S390_INT_PFAULT_INIT:
1946 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1947 case KVM_S390_INT_VIRTIO:
1948 case KVM_S390_INT_SERVICE:
1949 target = (void *) &inti->ext;
1950 source = &uptr->u.ext;
1951 size = sizeof(inti->ext);
1952 break;
1953 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1954 target = (void *) &inti->io;
1955 source = &uptr->u.io;
1956 size = sizeof(inti->io);
1957 break;
1958 case KVM_S390_MCHK:
1959 target = (void *) &inti->mchk;
1960 source = &uptr->u.mchk;
1961 size = sizeof(inti->mchk);
1962 break;
1963 default:
1964 return -EINVAL;
1965 }
1966
1967 if (copy_from_user(target, source, size))
1968 return -EFAULT;
1969
1970 return 0;
1971}
1972
1973static int enqueue_floating_irq(struct kvm_device *dev,
1974 struct kvm_device_attr *attr)
1975{
1976 struct kvm_s390_interrupt_info *inti = NULL;
1977 int r = 0;
1978 int len = attr->attr;
1979
1980 if (len % sizeof(struct kvm_s390_irq) != 0)
1981 return -EINVAL;
1982 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1983 return -EINVAL;
1984
1985 while (len >= sizeof(struct kvm_s390_irq)) {
1986 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1987 if (!inti)
1988 return -ENOMEM;
1989
1990 r = copy_irq_from_user(inti, attr->addr);
1991 if (r) {
1992 kfree(inti);
1993 return r;
1994 }
a91b8ebe
JF		 1995 r = __inject_vm(dev->kvm, inti);
1996 if (r) {
1997 kfree(inti);
1998 return r;
1999 }
c05c4186
JF		 2000 len -= sizeof(struct kvm_s390_irq);
2001 attr->addr += sizeof(struct kvm_s390_irq);
2002 }
2003
2004 return r;
2005}
2006
841b91c5
CH		 2007static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
2008{
2009 if (id >= MAX_S390_IO_ADAPTERS)
2010 return NULL;
2011 return kvm->arch.adapters[id];
2012}
2013
2014static int register_io_adapter(struct kvm_device *dev,
2015 struct kvm_device_attr *attr)
2016{
2017 struct s390_io_adapter *adapter;
2018 struct kvm_s390_io_adapter adapter_info;
2019
2020 if (copy_from_user(&adapter_info,
2021 (void __user *)attr->addr, sizeof(adapter_info)))
2022 return -EFAULT;
2023
2024 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
2025 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
2026 return -EINVAL;
2027
2028 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
2029 if (!adapter)
2030 return -ENOMEM;
2031
2032 INIT_LIST_HEAD(&adapter->maps);
2033 init_rwsem(&adapter->maps_lock);
2034 atomic_set(&adapter->nr_maps, 0);
2035 adapter->id = adapter_info.id;
2036 adapter->isc = adapter_info.isc;
2037 adapter->maskable = adapter_info.maskable;
2038 adapter->masked = false;
2039 adapter->swap = adapter_info.swap;
08fab50d
FL		 2040 adapter->suppressible = (adapter_info.flags) &
2041 KVM_S390_ADAPTER_SUPPRESSIBLE;
841b91c5
CH		 2042 dev->kvm->arch.adapters[adapter->id] = adapter;
2043
2044 return 0;
2045}
2046
2047int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
2048{
2049 int ret;
2050 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2051
2052 if (!adapter || !adapter->maskable)
2053 return -EINVAL;
2054 ret = adapter->masked;
2055 adapter->masked = masked;
2056 return ret;
2057}
2058
2059static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
2060{
2061 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2062 struct s390_map_info *map;
2063 int ret;
2064
2065 if (!adapter || !addr)
2066 return -EINVAL;
2067
2068 map = kzalloc(sizeof(*map), GFP_KERNEL);
2069 if (!map) {
2070 ret = -ENOMEM;
2071 goto out;
2072 }
2073 INIT_LIST_HEAD(&map->list);
2074 map->guest_addr = addr;
6e0a0431 2075 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 2076 if (map->addr == -EFAULT) {
2077 ret = -EFAULT;
2078 goto out;
2079 }
2080 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
2081 if (ret < 0)
2082 goto out;
2083 BUG_ON(ret != 1);
2084 down_write(&adapter->maps_lock);
2085 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
2086 list_add_tail(&map->list, &adapter->maps);
2087 ret = 0;
2088 } else {
2089 put_page(map->page);
2090 ret = -EINVAL;
2091 }
2092 up_write(&adapter->maps_lock);
2093out:
2094 if (ret)
2095 kfree(map);
2096 return ret;
2097}
2098
2099static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
2100{
2101 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2102 struct s390_map_info *map, *tmp;
2103 int found = 0;
2104
2105 if (!adapter || !addr)
2106 return -EINVAL;
2107
2108 down_write(&adapter->maps_lock);
2109 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
2110 if (map->guest_addr == addr) {
2111 found = 1;
2112 atomic_dec(&adapter->nr_maps);
2113 list_del(&map->list);
2114 put_page(map->page);
2115 kfree(map);
2116 break;
2117 }
2118 }
2119 up_write(&adapter->maps_lock);
2120
2121 return found ? 0 : -EINVAL;
2122}
2123
2124void kvm_s390_destroy_adapters(struct kvm *kvm)
2125{
2126 int i;
2127 struct s390_map_info *map, *tmp;
2128
2129 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
2130 if (!kvm->arch.adapters[i])
2131 continue;
2132 list_for_each_entry_safe(map, tmp,
2133 &kvm->arch.adapters[i]->maps, list) {
2134 list_del(&map->list);
2135 put_page(map->page);
2136 kfree(map);
2137 }
2138 kfree(kvm->arch.adapters[i]);
2139 }
2140}
2141
2142static int modify_io_adapter(struct kvm_device *dev,
2143 struct kvm_device_attr *attr)
2144{
2145 struct kvm_s390_io_adapter_req req;
2146 struct s390_io_adapter *adapter;
2147 int ret;
2148
2149 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2150 return -EFAULT;
2151
2152 adapter = get_io_adapter(dev->kvm, req.id);
2153 if (!adapter)
2154 return -EINVAL;
2155 switch (req.type) {
2156 case KVM_S390_IO_ADAPTER_MASK:
2157 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
2158 if (ret > 0)
2159 ret = 0;
2160 break;
2161 case KVM_S390_IO_ADAPTER_MAP:
2162 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
2163 break;
2164 case KVM_S390_IO_ADAPTER_UNMAP:
2165 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
2166 break;
2167 default:
2168 ret = -EINVAL;
2169 }
2170
2171 return ret;
2172}
2173
6d28f789
HP		 2174static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
2175
2176{
2177 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
2178 u32 schid;
2179
2180 if (attr->flags)
2181 return -EINVAL;
2182 if (attr->attr != sizeof(schid))
2183 return -EINVAL;
2184 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
2185 return -EFAULT;
4dd6f17e
MM		 2186 if (!schid)
2187 return -EINVAL;
6d28f789
HP		 2188 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
2189 /*
2190 * If userspace is conforming to the architecture, we can have at most
2191 * one pending I/O interrupt per subchannel, so this is effectively a
2192 * clear all.
2193 */
2194 return 0;
2195}
2196
51978393
FL		 2197static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr)
2198{
2199 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2200 struct kvm_s390_ais_req req;
2201 int ret = 0;
2202
1ba15b24 2203 if (!test_kvm_facility(kvm, 72))
51978393
FL		 2204 return -ENOTSUPP;
2205
2206 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2207 return -EFAULT;
2208
2209 if (req.isc > MAX_ISC)
2210 return -EINVAL;
2211
2212 trace_kvm_s390_modify_ais_mode(req.isc,
2213 (fi->simm & AIS_MODE_MASK(req.isc)) ?
2214 (fi->nimm & AIS_MODE_MASK(req.isc)) ?
2215 2 : KVM_S390_AIS_MODE_SINGLE :
2216 KVM_S390_AIS_MODE_ALL, req.mode);
2217
2218 mutex_lock(&fi->ais_lock);
2219 switch (req.mode) {
2220 case KVM_S390_AIS_MODE_ALL:
2221 fi->simm &= ~AIS_MODE_MASK(req.isc);
2222 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2223 break;
2224 case KVM_S390_AIS_MODE_SINGLE:
2225 fi->simm |= AIS_MODE_MASK(req.isc);
2226 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2227 break;
2228 default:
2229 ret = -EINVAL;
2230 }
2231 mutex_unlock(&fi->ais_lock);
2232
2233 return ret;
2234}
2235
a8920950
YMZ		 2236static int kvm_s390_inject_airq(struct kvm *kvm,
2237 struct s390_io_adapter *adapter)
2238{
2239 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2240 struct kvm_s390_interrupt s390int = {
2241 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2242 .parm = 0,
2243 .parm64 = (adapter->isc << 27) | 0x80000000,
2244 };
2245 int ret = 0;
2246
1ba15b24 2247 if (!test_kvm_facility(kvm, 72) || !adapter->suppressible)
a8920950
YMZ		 2248 return kvm_s390_inject_vm(kvm, &s390int);
2249
2250 mutex_lock(&fi->ais_lock);
2251 if (fi->nimm & AIS_MODE_MASK(adapter->isc)) {
2252 trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc);
2253 goto out;
2254 }
2255
2256 ret = kvm_s390_inject_vm(kvm, &s390int);
2257 if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) {
2258 fi->nimm |= AIS_MODE_MASK(adapter->isc);
2259 trace_kvm_s390_modify_ais_mode(adapter->isc,
2260 KVM_S390_AIS_MODE_SINGLE, 2);
2261 }
2262out:
2263 mutex_unlock(&fi->ais_lock);
2264 return ret;
2265}
2266
2267static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr)
2268{
2269 unsigned int id = attr->attr;
2270 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2271
2272 if (!adapter)
2273 return -EINVAL;
2274
2275 return kvm_s390_inject_airq(kvm, adapter);
2276}
2277
2c1a48f2
YMZ		 2278static int flic_ais_mode_set_all(struct kvm *kvm, struct kvm_device_attr *attr)
2279{
2280 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2281 struct kvm_s390_ais_all ais;
2282
2283 if (!test_kvm_facility(kvm, 72))
2284 return -ENOTSUPP;
2285
2286 if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais)))
2287 return -EFAULT;
2288
2289 mutex_lock(&fi->ais_lock);
2290 fi->simm = ais.simm;
2291 fi->nimm = ais.nimm;
2292 mutex_unlock(&fi->ais_lock);
2293
2294 return 0;
2295}
2296
c05c4186
JF		 2297static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2298{
2299 int r = 0;
3c038e6b
DD		 2300 unsigned int i;
2301 struct kvm_vcpu *vcpu;
c05c4186
JF		 2302
2303 switch (attr->group) {
2304 case KVM_DEV_FLIC_ENQUEUE:
2305 r = enqueue_floating_irq(dev, attr);
2306 break;
2307 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 2308 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 2309 break;
3c038e6b
DD		 2310 case KVM_DEV_FLIC_APF_ENABLE:
2311 dev->kvm->arch.gmap->pfault_enabled = 1;
2312 break;
2313 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2314 dev->kvm->arch.gmap->pfault_enabled = 0;
2315 /*
2316 * Make sure no async faults are in transition when
2317 * clearing the queues. So we don't need to worry
2318 * about late coming workers.
2319 */
2320 synchronize_srcu(&dev->kvm->srcu);
2321 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2322 kvm_clear_async_pf_completion_queue(vcpu);
2323 break;
841b91c5
CH		 2324 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2325 r = register_io_adapter(dev, attr);
2326 break;
2327 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2328 r = modify_io_adapter(dev, attr);
2329 break;
6d28f789
HP		 2330 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2331 r = clear_io_irq(dev->kvm, attr);
2332 break;
51978393
FL		 2333 case KVM_DEV_FLIC_AISM:
2334 r = modify_ais_mode(dev->kvm, attr);
2335 break;
a8920950
YMZ		 2336 case KVM_DEV_FLIC_AIRQ_INJECT:
2337 r = flic_inject_airq(dev->kvm, attr);
2338 break;
2c1a48f2
YMZ		 2339 case KVM_DEV_FLIC_AISM_ALL:
2340 r = flic_ais_mode_set_all(dev->kvm, attr);
2341 break;
c05c4186
JF		 2342 default:
2343 r = -EINVAL;
2344 }
2345
2346 return r;
2347}
2348
4f129858
HP		 2349static int flic_has_attr(struct kvm_device *dev,
2350 struct kvm_device_attr *attr)
2351{
2352 switch (attr->group) {
2353 case KVM_DEV_FLIC_GET_ALL_IRQS:
2354 case KVM_DEV_FLIC_ENQUEUE:
2355 case KVM_DEV_FLIC_CLEAR_IRQS:
2356 case KVM_DEV_FLIC_APF_ENABLE:
2357 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2358 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2359 case KVM_DEV_FLIC_ADAPTER_MODIFY:
6d28f789 2360 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
51978393 2361 case KVM_DEV_FLIC_AISM:
a8920950 2362 case KVM_DEV_FLIC_AIRQ_INJECT:
2c1a48f2 2363 case KVM_DEV_FLIC_AISM_ALL:
4f129858
HP		 2364 return 0;
2365 }
2366 return -ENXIO;
2367}
2368
c05c4186
JF		 2369static int flic_create(struct kvm_device *dev, u32 type)
2370{
2371 if (!dev)
2372 return -EINVAL;
2373 if (dev->kvm->arch.flic)
2374 return -EINVAL;
2375 dev->kvm->arch.flic = dev;
2376 return 0;
2377}
2378
2379static void flic_destroy(struct kvm_device *dev)
2380{
2381 dev->kvm->arch.flic = NULL;
2382 kfree(dev);
2383}
2384
2385/* s390 floating irq controller (flic) */
2386struct kvm_device_ops kvm_flic_ops = {
2387 .name = "kvm-flic",
2388 .get_attr = flic_get_attr,
2389 .set_attr = flic_set_attr,
4f129858 2390 .has_attr = flic_has_attr,
c05c4186
JF		 2391 .create = flic_create,
2392 .destroy = flic_destroy,
2393};
84223598
CH		 2394
2395static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2396{
2397 unsigned long bit;
2398
2399 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2400
2401 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2402}
2403
2404static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2405 u64 addr)
2406{
2407 struct s390_map_info *map;
2408
2409 if (!adapter)
2410 return NULL;
2411
2412 list_for_each_entry(map, &adapter->maps, list) {
2413 if (map->guest_addr == addr)
2414 return map;
2415 }
2416 return NULL;
2417}
2418
2419static int adapter_indicators_set(struct kvm *kvm,
2420 struct s390_io_adapter *adapter,
2421 struct kvm_s390_adapter_int *adapter_int)
2422{
2423 unsigned long bit;
2424 int summary_set, idx;
2425 struct s390_map_info *info;
2426 void *map;
2427
2428 info = get_map_info(adapter, adapter_int->ind_addr);
2429 if (!info)
2430 return -1;
2431 map = page_address(info->page);
2432 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2433 set_bit(bit, map);
2434 idx = srcu_read_lock(&kvm->srcu);
2435 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2436 set_page_dirty_lock(info->page);
2437 info = get_map_info(adapter, adapter_int->summary_addr);
2438 if (!info) {
2439 srcu_read_unlock(&kvm->srcu, idx);
2440 return -1;
2441 }
2442 map = page_address(info->page);
2443 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2444 adapter->swap);
2445 summary_set = test_and_set_bit(bit, map);
2446 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2447 set_page_dirty_lock(info->page);
2448 srcu_read_unlock(&kvm->srcu, idx);
2449 return summary_set ? 0 : 1;
2450}
2451
2452/*
2453 * < 0 - not injected due to error
2454 * = 0 - coalesced, summary indicator already active
2455 * > 0 - injected interrupt
2456 */
2457static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2458 struct kvm *kvm, int irq_source_id, int level,
2459 bool line_status)
2460{
2461 int ret;
2462 struct s390_io_adapter *adapter;
2463
2464 /* We're only interested in the 0->1 transition. */
2465 if (!level)
2466 return 0;
2467 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2468 if (!adapter)
2469 return -1;
2470 down_read(&adapter->maps_lock);
2471 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2472 up_read(&adapter->maps_lock);
2473 if ((ret > 0) && !adapter->masked) {
a8920950 2474 ret = kvm_s390_inject_airq(kvm, adapter);
84223598
CH		 2475 if (ret == 0)
2476 ret = 1;
2477 }
2478 return ret;
2479}
2480
4d62fcc0
QH		 2481/*
2482 * Inject the machine check to the guest.
2483 */
2484void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
2485 struct mcck_volatile_info *mcck_info)
2486{
2487 struct kvm_s390_interrupt_info inti;
2488 struct kvm_s390_irq irq;
2489 struct kvm_s390_mchk_info *mchk;
2490 union mci mci;
2491 __u64 cr14 = 0; /* upper bits are not used */
3dbf0205 2492 int rc;
4d62fcc0
QH		 2493
2494 mci.val = mcck_info->mcic;
2495 if (mci.sr)
cc65450c 2496 cr14 |= CR14_RECOVERY_SUBMASK;
4d62fcc0 2497 if (mci.dg)
cc65450c 2498 cr14 |= CR14_DEGRADATION_SUBMASK;
4d62fcc0 2499 if (mci.w)
cc65450c 2500 cr14 |= CR14_WARNING_SUBMASK;
4d62fcc0
QH		 2501
2502 mchk = mci.ck ? &inti.mchk : &irq.u.mchk;
2503 mchk->cr14 = cr14;
2504 mchk->mcic = mcck_info->mcic;
2505 mchk->ext_damage_code = mcck_info->ext_damage_code;
2506 mchk->failing_storage_address = mcck_info->failing_storage_address;
2507 if (mci.ck) {
2508 /* Inject the floating machine check */
2509 inti.type = KVM_S390_MCHK;
3dbf0205 2510 rc = __inject_vm(vcpu->kvm, &inti);
4d62fcc0
QH		 2511 } else {
2512 /* Inject the machine check to specified vcpu */
2513 irq.type = KVM_S390_MCHK;
3dbf0205 2514 rc = kvm_s390_inject_vcpu(vcpu, &irq);
4d62fcc0 2515 }
3dbf0205 2516 WARN_ON_ONCE(rc);
4d62fcc0
QH		 2517}
2518
c63cf538
RK		 2519int kvm_set_routing_entry(struct kvm *kvm,
2520 struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 2521 const struct kvm_irq_routing_entry *ue)
2522{
2523 int ret;
2524
2525 switch (ue->type) {
2526 case KVM_IRQ_ROUTING_S390_ADAPTER:
2527 e->set = set_adapter_int;
2528 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2529 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2530 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2531 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2532 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2533 ret = 0;
2534 break;
2535 default:
2536 ret = -EINVAL;
2537 }
2538
2539 return ret;
2540}
2541
2542int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2543 int irq_source_id, int level, bool line_status)
2544{
2545 return -EINVAL;
2546}
816c7667
JF		 2547
2548int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2549{
2550 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2551 struct kvm_s390_irq *buf;
2552 int r = 0;
2553 int n;
2554
2555 buf = vmalloc(len);
2556 if (!buf)
2557 return -ENOMEM;
2558
2559 if (copy_from_user((void *) buf, irqstate, len)) {
2560 r = -EFAULT;
2561 goto out_free;
2562 }
2563
2564 /*
2565 * Don't allow setting the interrupt state
2566 * when there are already interrupts pending
2567 */
2568 spin_lock(&li->lock);
2569 if (li->pending_irqs) {
2570 r = -EBUSY;
2571 goto out_unlock;
2572 }
2573
2574 for (n = 0; n < len / sizeof(*buf); n++) {
2575 r = do_inject_vcpu(vcpu, &buf[n]);
2576 if (r)
2577 break;
2578 }
2579
2580out_unlock:
2581 spin_unlock(&li->lock);
2582out_free:
2583 vfree(buf);
2584
2585 return r;
2586}
2587
2588static void store_local_irq(struct kvm_s390_local_interrupt *li,
2589 struct kvm_s390_irq *irq,
2590 unsigned long irq_type)
2591{
2592 switch (irq_type) {
2593 case IRQ_PEND_MCHK_EX:
2594 case IRQ_PEND_MCHK_REP:
2595 irq->type = KVM_S390_MCHK;
2596 irq->u.mchk = li->irq.mchk;
2597 break;
2598 case IRQ_PEND_PROG:
2599 irq->type = KVM_S390_PROGRAM_INT;
2600 irq->u.pgm = li->irq.pgm;
2601 break;
2602 case IRQ_PEND_PFAULT_INIT:
2603 irq->type = KVM_S390_INT_PFAULT_INIT;
2604 irq->u.ext = li->irq.ext;
2605 break;
2606 case IRQ_PEND_EXT_EXTERNAL:
2607 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2608 irq->u.extcall = li->irq.extcall;
2609 break;
2610 case IRQ_PEND_EXT_CLOCK_COMP:
2611 irq->type = KVM_S390_INT_CLOCK_COMP;
2612 break;
2613 case IRQ_PEND_EXT_CPU_TIMER:
2614 irq->type = KVM_S390_INT_CPU_TIMER;
2615 break;
2616 case IRQ_PEND_SIGP_STOP:
2617 irq->type = KVM_S390_SIGP_STOP;
2618 irq->u.stop = li->irq.stop;
2619 break;
2620 case IRQ_PEND_RESTART:
2621 irq->type = KVM_S390_RESTART;
2622 break;
2623 case IRQ_PEND_SET_PREFIX:
2624 irq->type = KVM_S390_SIGP_SET_PREFIX;
2625 irq->u.prefix = li->irq.prefix;
2626 break;
2627 }
2628}
2629
2630int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2631{
a5bd7647 2632 int scn;
816c7667
JF		 2633 unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
2634 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2635 unsigned long pending_irqs;
2636 struct kvm_s390_irq irq;
2637 unsigned long irq_type;
2638 int cpuaddr;
2639 int n = 0;
2640
2641 spin_lock(&li->lock);
2642 pending_irqs = li->pending_irqs;
2643 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2644 sizeof(sigp_emerg_pending));
2645 spin_unlock(&li->lock);
2646
2647 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2648 memset(&irq, 0, sizeof(irq));
2649 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2650 continue;
2651 if (n + sizeof(irq) > len)
2652 return -ENOBUFS;
2653 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2654 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2655 return -EFAULT;
2656 n += sizeof(irq);
2657 }
2658
2659 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2660 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2661 memset(&irq, 0, sizeof(irq));
2662 if (n + sizeof(irq) > len)
2663 return -ENOBUFS;
2664 irq.type = KVM_S390_INT_EMERGENCY;
2665 irq.u.emerg.code = cpuaddr;
2666 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2667 return -EFAULT;
2668 n += sizeof(irq);
2669 }
2670 }
2671
a5bd7647 2672 if (sca_ext_call_pending(vcpu, &scn)) {
816c7667
JF		 2673 if (n + sizeof(irq) > len)
2674 return -ENOBUFS;
2675 memset(&irq, 0, sizeof(irq));
2676 irq.type = KVM_S390_INT_EXTERNAL_CALL;
a5bd7647 2677 irq.u.extcall.code = scn;
816c7667
JF		 2678 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2679 return -EFAULT;
2680 n += sizeof(irq);
2681 }
2682
2683 return n;
2684}
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