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Merge remote-tracking branches 'asoc/fix/max98371', 'asoc/fix/nau8825', 'asoc/fix...
[linux-2.6-block.git] / arch / s390 / kvm / interrupt.c
CommitLineData
ba5c1e9b 1/*
a53c8fab 2 * handling kvm guest interrupts
ba5c1e9b 3 *
33b412ac 4 * Copyright IBM Corp. 2008, 2015
ba5c1e9b
CO		 5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
9 *
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 */
12
ca872302 13#include <linux/interrupt.h>
ba5c1e9b 14#include <linux/kvm_host.h>
cbb870c8 15#include <linux/hrtimer.h>
84223598 16#include <linux/mmu_context.h>
3cd61299 17#include <linux/signal.h>
5a0e3ad6 18#include <linux/slab.h>
383d0b05 19#include <linux/bitmap.h>
94aa033e 20#include <linux/vmalloc.h>
cbb870c8 21#include <asm/asm-offsets.h>
33b412ac 22#include <asm/dis.h>
cbb870c8 23#include <asm/uaccess.h>
ea5f4969 24#include <asm/sclp.h>
6d3da241 25#include <asm/isc.h>
1e133ab2 26#include <asm/gmap.h>
ba5c1e9b
CO		 27#include "kvm-s390.h"
28#include "gaccess.h"
ade38c31 29#include "trace-s390.h"
ba5c1e9b 30
44c6ca3d 31#define PFAULT_INIT 0x0600
60f90a14
JF		 32#define PFAULT_DONE 0x0680
33#define VIRTIO_PARAM 0x0d00
d8346b7d 34
a5bd7647
ED		 35/* handle external calls via sigp interpretation facility */
36static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id)
37{
7d43bafc
ED		 38 int c, scn;
39
2c1bb2be
DH		 40 if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND))
41 return 0;
42
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
5e044315 71 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 72 if (vcpu->kvm->arch.use_esca) {
73 struct esca_block *sca = vcpu->kvm->arch.sca;
74 union esca_sigp_ctrl *sigp_ctrl =
75 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
76 union esca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
77
78 new_val.scn = src_id;
79 new_val.c = 1;
80 old_val.c = 0;
81
82 expect = old_val.value;
83 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
84 } else {
85 struct bsca_block *sca = vcpu->kvm->arch.sca;
86 union bsca_sigp_ctrl *sigp_ctrl =
87 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
88 union bsca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
bc784cce 89
7d43bafc
ED		 90 new_val.scn = src_id;
91 new_val.c = 1;
92 old_val.c = 0;
93
94 expect = old_val.value;
95 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
96 }
5e044315 97 read_unlock(&vcpu->kvm->arch.sca_lock);
bc784cce
ED		 98
99 if (rc != expect) {
a5bd7647
ED		 100 /* another external call is pending */
101 return -EBUSY;
102 }
103 atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
104 return 0;
105}
106
107static void sca_clear_ext_call(struct kvm_vcpu *vcpu)
108{
a5bd7647 109 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
7d43bafc 110 int rc, expect;
a5bd7647
ED		 111
112 atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags);
5e044315 113 read_lock(&vcpu->kvm->arch.sca_lock);
7d43bafc
ED		 114 if (vcpu->kvm->arch.use_esca) {
115 struct esca_block *sca = vcpu->kvm->arch.sca;
116 union esca_sigp_ctrl *sigp_ctrl =
117 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
118 union esca_sigp_ctrl old = *sigp_ctrl;
119
120 expect = old.value;
121 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
122 } else {
123 struct bsca_block *sca = vcpu->kvm->arch.sca;
124 union bsca_sigp_ctrl *sigp_ctrl =
125 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
126 union bsca_sigp_ctrl old = *sigp_ctrl;
127
128 expect = old.value;
129 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
130 }
5e044315 131 read_unlock(&vcpu->kvm->arch.sca_lock);
7d43bafc 132 WARN_ON(rc != expect); /* cannot clear? */
a5bd7647
ED		 133}
134
3c038e6b 135int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 136{
137 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
138}
139
d8346b7d
CH		 140static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
141{
142 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
143}
144
48a3e950
CH		 145static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
146{
147 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
148}
149
ba5c1e9b
CO		 150static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
151{
fee0e0fd
DH		 152 return psw_extint_disabled(vcpu) &&
153 psw_ioint_disabled(vcpu) &&
154 psw_mchk_disabled(vcpu);
ba5c1e9b
CO		 155}
156
bb78c5ec
DH		 157static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
158{
159 if (psw_extint_disabled(vcpu) ||
160 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
161 return 0;
f71d0dc5
DH		 162 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
163 /* No timer interrupts when single stepping */
164 return 0;
bb78c5ec
DH		 165 return 1;
166}
167
b4aec925
DH		 168static int ckc_irq_pending(struct kvm_vcpu *vcpu)
169{
60417fcc 170 if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm))
b4aec925
DH		 171 return 0;
172 return ckc_interrupts_enabled(vcpu);
173}
174
175static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
176{
177 return !psw_extint_disabled(vcpu) &&
178 (vcpu->arch.sie_block->gcr[0] & 0x400ul);
179}
180
181static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
182{
4287f247
DH		 183 if (!cpu_timer_interrupts_enabled(vcpu))
184 return 0;
185 return kvm_s390_get_cpu_timer(vcpu) >> 63;
b4aec925
DH		 186}
187
6d3da241 188static inline int is_ioirq(unsigned long irq_type)
79fd50c6 189{
6d3da241
JF		 190 return ((irq_type >= IRQ_PEND_IO_ISC_0) &&
191 (irq_type <= IRQ_PEND_IO_ISC_7));
192}
79fd50c6 193
6d3da241
JF		 194static uint64_t isc_to_isc_bits(int isc)
195{
79fd50c6
CH		 196 return (0x80 >> isc) << 24;
197}
198
6d3da241 199static inline u8 int_word_to_isc(u32 int_word)
ba5c1e9b 200{
6d3da241
JF		 201 return (int_word & 0x38000000) >> 27;
202}
203
5f94c58e 204static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
6d3da241 205{
5f94c58e
DH		 206 return vcpu->kvm->arch.float_int.pending_irqs |
207 vcpu->arch.local_int.pending_irqs;
383d0b05
JF		 208}
209
6d3da241
JF		 210static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
211 unsigned long active_mask)
212{
213 int i;
214
215 for (i = 0; i <= MAX_ISC; i++)
216 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
217 active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i));
218
219 return active_mask;
220}
221
222static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
383d0b05 223{
6d3da241
JF		 224 unsigned long active_mask;
225
5f94c58e 226 active_mask = pending_irqs(vcpu);
ffeca0ae
JF		 227 if (!active_mask)
228 return 0;
383d0b05
JF		 229
230 if (psw_extint_disabled(vcpu))
231 active_mask &= ~IRQ_PEND_EXT_MASK;
6d3da241
JF		 232 if (psw_ioint_disabled(vcpu))
233 active_mask &= ~IRQ_PEND_IO_MASK;
234 else
235 active_mask = disable_iscs(vcpu, active_mask);
383d0b05
JF		 236 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
237 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
238 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
239 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
240 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
241 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
242 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
243 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
6d3da241
JF		 244 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
245 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
383d0b05
JF		 246 if (psw_mchk_disabled(vcpu))
247 active_mask &= ~IRQ_PEND_MCHK_MASK;
6d3da241
JF		 248 if (!(vcpu->arch.sie_block->gcr[14] &
249 vcpu->kvm->arch.float_int.mchk.cr14))
250 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
383d0b05 251
6cddd432
DH		 252 /*
253 * STOP irqs will never be actively delivered. They are triggered via
254 * intercept requests and cleared when the stop intercept is performed.
255 */
256 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
257
383d0b05
JF		 258 return active_mask;
259}
260
ba5c1e9b
CO		 261static void __set_cpu_idle(struct kvm_vcpu *vcpu)
262{
805de8f4 263 atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 264 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
265}
266
267static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
268{
805de8f4 269 atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 270 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
271}
272
273static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
274{
805de8f4
PZ		 275 atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
276 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 277 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 278 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
279
280 if (guestdbg_enabled(vcpu)) {
281 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
282 LCTL_CR10 | LCTL_CR11);
283 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
284 }
ba5c1e9b
CO		 285}
286
287static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
288{
805de8f4 289 atomic_or(flag, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 290}
291
6d3da241
JF		 292static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
293{
5f94c58e 294 if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK))
6d3da241
JF		 295 return;
296 else if (psw_ioint_disabled(vcpu))
297 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
298 else
299 vcpu->arch.sie_block->lctl |= LCTL_CR6;
300}
301
383d0b05
JF		 302static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
303{
5f94c58e 304 if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
383d0b05
JF		 305 return;
306 if (psw_extint_disabled(vcpu))
307 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
308 else
309 vcpu->arch.sie_block->lctl |= LCTL_CR0;
310}
311
312static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
313{
5f94c58e 314 if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
383d0b05
JF		 315 return;
316 if (psw_mchk_disabled(vcpu))
317 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
318 else
319 vcpu->arch.sie_block->lctl |= LCTL_CR14;
320}
321
6cddd432
DH		 322static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
323{
324 if (kvm_s390_is_stop_irq_pending(vcpu))
325 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
326}
327
6d3da241
JF		 328/* Set interception request for non-deliverable interrupts */
329static void set_intercept_indicators(struct kvm_vcpu *vcpu)
383d0b05 330{
6d3da241 331 set_intercept_indicators_io(vcpu);
383d0b05
JF		 332 set_intercept_indicators_ext(vcpu);
333 set_intercept_indicators_mchk(vcpu);
6cddd432 334 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 335}
336
0fb97abe
JF		 337static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
338{
383d0b05 339 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 340 int rc;
341
342 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
343 0, 0);
344
345 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
346 (u16 *)__LC_EXT_INT_CODE);
467fc298 347 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 348 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
349 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
350 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
351 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 352 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 353 return rc ? -EFAULT : 0;
0fb97abe
JF		 354}
355
356static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
357{
383d0b05 358 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 359 int rc;
360
361 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
362 0, 0);
363
364 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
365 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 366 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 367 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
368 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
369 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
370 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 371 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 372 return rc ? -EFAULT : 0;
0fb97abe
JF		 373}
374
383d0b05 375static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 376{
383d0b05
JF		 377 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
378 struct kvm_s390_ext_info ext;
0fb97abe
JF		 379 int rc;
380
383d0b05
JF		 381 spin_lock(&li->lock);
382 ext = li->irq.ext;
383 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
384 li->irq.ext.ext_params2 = 0;
385 spin_unlock(&li->lock);
386
3f24ba15
CB		 387 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
388 ext.ext_params2);
0fb97abe
JF		 389 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
390 KVM_S390_INT_PFAULT_INIT,
383d0b05 391 0, ext.ext_params2);
0fb97abe
JF		 392
393 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
394 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
395 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
396 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
397 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
398 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 399 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 400 return rc ? -EFAULT : 0;
0fb97abe
JF		 401}
402
383d0b05 403static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 404{
6d3da241 405 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
383d0b05 406 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
6d3da241 407 struct kvm_s390_mchk_info mchk = {};
bc17de7c 408 unsigned long adtl_status_addr;
6d3da241
JF		 409 int deliver = 0;
410 int rc = 0;
0fb97abe 411
6d3da241 412 spin_lock(&fi->lock);
383d0b05 413 spin_lock(&li->lock);
6d3da241
JF		 414 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
415 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
416 /*
417 * If there was an exigent machine check pending, then any
418 * repressible machine checks that might have been pending
419 * are indicated along with it, so always clear bits for
420 * repressible and exigent interrupts
421 */
422 mchk = li->irq.mchk;
423 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
424 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
425 memset(&li->irq.mchk, 0, sizeof(mchk));
426 deliver = 1;
427 }
383d0b05 428 /*
6d3da241
JF		 429 * We indicate floating repressible conditions along with
430 * other pending conditions. Channel Report Pending and Channel
431 * Subsystem damage are the only two and and are indicated by
432 * bits in mcic and masked in cr14.
383d0b05 433 */
6d3da241
JF		 434 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
435 mchk.mcic |= fi->mchk.mcic;
436 mchk.cr14 |= fi->mchk.cr14;
437 memset(&fi->mchk, 0, sizeof(mchk));
438 deliver = 1;
439 }
383d0b05 440 spin_unlock(&li->lock);
6d3da241 441 spin_unlock(&fi->lock);
383d0b05 442
6d3da241 443 if (deliver) {
3f24ba15 444 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
6d3da241
JF		 445 mchk.mcic);
446 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
447 KVM_S390_MCHK,
448 mchk.cr14, mchk.mcic);
449
450 rc = kvm_s390_vcpu_store_status(vcpu,
451 KVM_S390_STORE_STATUS_PREFIXED);
452 rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR,
453 &adtl_status_addr,
454 sizeof(unsigned long));
455 rc |= kvm_s390_vcpu_store_adtl_status(vcpu,
456 adtl_status_addr);
457 rc |= put_guest_lc(vcpu, mchk.mcic,
458 (u64 __user *) __LC_MCCK_CODE);
459 rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
460 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
461 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
462 &mchk.fixed_logout,
463 sizeof(mchk.fixed_logout));
464 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
465 &vcpu->arch.sie_block->gpsw,
466 sizeof(psw_t));
467 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
468 &vcpu->arch.sie_block->gpsw,
469 sizeof(psw_t));
470 }
99e20009 471 return rc ? -EFAULT : 0;
0fb97abe
JF		 472}
473
474static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
475{
383d0b05 476 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 477 int rc;
478
3f24ba15 479 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
0fb97abe
JF		 480 vcpu->stat.deliver_restart_signal++;
481 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
482
483 rc = write_guest_lc(vcpu,
c667aeac 484 offsetof(struct lowcore, restart_old_psw),
0fb97abe 485 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
c667aeac 486 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw),
0fb97abe 487 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 488 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 489 return rc ? -EFAULT : 0;
0fb97abe
JF		 490}
491
383d0b05 492static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 493{
383d0b05
JF		 494 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
495 struct kvm_s390_prefix_info prefix;
496
497 spin_lock(&li->lock);
498 prefix = li->irq.prefix;
499 li->irq.prefix.address = 0;
500 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
501 spin_unlock(&li->lock);
0fb97abe 502
0fb97abe
JF		 503 vcpu->stat.deliver_prefix_signal++;
504 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
505 KVM_S390_SIGP_SET_PREFIX,
383d0b05 506 prefix.address, 0);
0fb97abe 507
383d0b05 508 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 509 return 0;
510}
511
383d0b05 512static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 513{
383d0b05 514 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 515 int rc;
383d0b05
JF		 516 int cpu_addr;
517
518 spin_lock(&li->lock);
519 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
520 clear_bit(cpu_addr, li->sigp_emerg_pending);
521 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
522 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
523 spin_unlock(&li->lock);
0fb97abe 524
3f24ba15 525 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
0fb97abe 526 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 527 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
528 cpu_addr, 0);
0fb97abe
JF		 529
530 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
531 (u16 *)__LC_EXT_INT_CODE);
383d0b05 532 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 533 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
534 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
535 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
536 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 537 return rc ? -EFAULT : 0;
0fb97abe
JF		 538}
539
383d0b05 540static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 541{
383d0b05
JF		 542 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
543 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 544 int rc;
545
383d0b05
JF		 546 spin_lock(&li->lock);
547 extcall = li->irq.extcall;
548 li->irq.extcall.code = 0;
549 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
550 spin_unlock(&li->lock);
551
3f24ba15 552 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
0fb97abe
JF		 553 vcpu->stat.deliver_external_call++;
554 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
555 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 556 extcall.code, 0);
0fb97abe
JF		 557
558 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
559 (u16 *)__LC_EXT_INT_CODE);
383d0b05 560 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 561 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
562 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
563 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
564 sizeof(psw_t));
99e20009 565 return rc ? -EFAULT : 0;
0fb97abe
JF		 566}
567
383d0b05 568static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 569{
383d0b05
JF		 570 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
571 struct kvm_s390_pgm_info pgm_info;
a9a846fd 572 int rc = 0, nullifying = false;
634790b8 573 u16 ilen;
8712836b 574
383d0b05
JF		 575 spin_lock(&li->lock);
576 pgm_info = li->irq.pgm;
577 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
578 memset(&li->irq.pgm, 0, sizeof(pgm_info));
579 spin_unlock(&li->lock);
580
634790b8 581 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
0e8bc06a
DH		 582 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
583 pgm_info.code, ilen);
0fb97abe
JF		 584 vcpu->stat.deliver_program_int++;
585 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 586 pgm_info.code, 0);
0fb97abe 587
383d0b05 588 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 589 case PGM_AFX_TRANSLATION:
590 case PGM_ASX_TRANSLATION:
591 case PGM_EX_TRANSLATION:
592 case PGM_LFX_TRANSLATION:
593 case PGM_LSTE_SEQUENCE:
594 case PGM_LSX_TRANSLATION:
595 case PGM_LX_TRANSLATION:
596 case PGM_PRIMARY_AUTHORITY:
597 case PGM_SECONDARY_AUTHORITY:
a9a846fd
TH		 598 nullifying = true;
599 /* fall through */
8712836b 600 case PGM_SPACE_SWITCH:
383d0b05 601 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 602 (u64 *)__LC_TRANS_EXC_CODE);
603 break;
604 case PGM_ALEN_TRANSLATION:
605 case PGM_ALE_SEQUENCE:
606 case PGM_ASTE_INSTANCE:
607 case PGM_ASTE_SEQUENCE:
608 case PGM_ASTE_VALIDITY:
609 case PGM_EXTENDED_AUTHORITY:
383d0b05 610 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 611 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 612 nullifying = true;
8712836b
DH		 613 break;
614 case PGM_ASCE_TYPE:
615 case PGM_PAGE_TRANSLATION:
616 case PGM_REGION_FIRST_TRANS:
617 case PGM_REGION_SECOND_TRANS:
618 case PGM_REGION_THIRD_TRANS:
619 case PGM_SEGMENT_TRANSLATION:
383d0b05 620 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 621 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 622 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 623 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 624 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 625 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 626 nullifying = true;
8712836b
DH		 627 break;
628 case PGM_MONITOR:
383d0b05 629 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 630 (u16 *)__LC_MON_CLASS_NR);
383d0b05 631 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 632 (u64 *)__LC_MON_CODE);
633 break;
403c8648 634 case PGM_VECTOR_PROCESSING:
8712836b 635 case PGM_DATA:
383d0b05 636 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 637 (u32 *)__LC_DATA_EXC_CODE);
638 break;
639 case PGM_PROTECTION:
383d0b05 640 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 641 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 642 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 643 (u8 *)__LC_EXC_ACCESS_ID);
644 break;
a9a846fd
TH		 645 case PGM_STACK_FULL:
646 case PGM_STACK_EMPTY:
647 case PGM_STACK_SPECIFICATION:
648 case PGM_STACK_TYPE:
649 case PGM_STACK_OPERATION:
650 case PGM_TRACE_TABEL:
651 case PGM_CRYPTO_OPERATION:
652 nullifying = true;
653 break;
8712836b
DH		 654 }
655
383d0b05
JF		 656 if (pgm_info.code & PGM_PER) {
657 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 658 (u8 *) __LC_PER_CODE);
383d0b05 659 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 660 (u8 *)__LC_PER_ATMID);
383d0b05 661 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 662 (u64 *) __LC_PER_ADDRESS);
383d0b05 663 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 664 (u8 *) __LC_PER_ACCESS_ID);
665 }
666
eaa4f416 667 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND))
0e8bc06a 668 kvm_s390_rewind_psw(vcpu, ilen);
a9a846fd 669
0e8bc06a
DH		 670 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
671 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
2ba45968
DH		 672 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
673 (u64 *) __LC_LAST_BREAK);
383d0b05 674 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 675 (u16 *)__LC_PGM_INT_CODE);
676 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
677 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
678 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
679 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 680 return rc ? -EFAULT : 0;
0fb97abe
JF		 681}
682
6d3da241 683static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
0fb97abe 684{
6d3da241
JF		 685 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
686 struct kvm_s390_ext_info ext;
687 int rc = 0;
688
689 spin_lock(&fi->lock);
690 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
691 spin_unlock(&fi->lock);
692 return 0;
693 }
694 ext = fi->srv_signal;
695 memset(&fi->srv_signal, 0, sizeof(ext));
696 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
697 spin_unlock(&fi->lock);
0fb97abe 698
3f24ba15 699 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
6d3da241 700 ext.ext_params);
0fb97abe 701 vcpu->stat.deliver_service_signal++;
6d3da241
JF		 702 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
703 ext.ext_params, 0);
0fb97abe
JF		 704
705 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 706 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 707 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
708 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
709 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
710 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
6d3da241 711 rc |= put_guest_lc(vcpu, ext.ext_params,
0fb97abe 712 (u32 *)__LC_EXT_PARAMS);
6d3da241 713
99e20009 714 return rc ? -EFAULT : 0;
0fb97abe
JF		 715}
716
6d3da241 717static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
0fb97abe 718{
6d3da241
JF		 719 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
720 struct kvm_s390_interrupt_info *inti;
721 int rc = 0;
0fb97abe 722
6d3da241
JF		 723 spin_lock(&fi->lock);
724 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
725 struct kvm_s390_interrupt_info,
726 list);
727 if (inti) {
6d3da241
JF		 728 list_del(&inti->list);
729 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
730 }
731 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
732 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
733 spin_unlock(&fi->lock);
8712836b 734
6d3da241 735 if (inti) {
3f24ba15
CB		 736 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
737 KVM_S390_INT_PFAULT_DONE, 0,
738 inti->ext.ext_params2);
739 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
740 inti->ext.ext_params2);
741
6d3da241
JF		 742 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
743 (u16 *)__LC_EXT_INT_CODE);
744 rc |= put_guest_lc(vcpu, PFAULT_DONE,
745 (u16 *)__LC_EXT_CPU_ADDR);
746 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
747 &vcpu->arch.sie_block->gpsw,
748 sizeof(psw_t));
749 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
750 &vcpu->arch.sie_block->gpsw,
751 sizeof(psw_t));
752 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
753 (u64 *)__LC_EXT_PARAMS2);
754 kfree(inti);
755 }
99e20009 756 return rc ? -EFAULT : 0;
0fb97abe
JF		 757}
758
6d3da241 759static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
0fb97abe 760{
6d3da241
JF		 761 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
762 struct kvm_s390_interrupt_info *inti;
763 int rc = 0;
0fb97abe 764
6d3da241
JF		 765 spin_lock(&fi->lock);
766 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
767 struct kvm_s390_interrupt_info,
768 list);
769 if (inti) {
770 VCPU_EVENT(vcpu, 4,
3f24ba15 771 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
6d3da241
JF		 772 inti->ext.ext_params, inti->ext.ext_params2);
773 vcpu->stat.deliver_virtio_interrupt++;
774 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
775 inti->type,
776 inti->ext.ext_params,
777 inti->ext.ext_params2);
778 list_del(&inti->list);
779 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
780 }
781 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
782 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
783 spin_unlock(&fi->lock);
0fb97abe 784
6d3da241
JF		 785 if (inti) {
786 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
787 (u16 *)__LC_EXT_INT_CODE);
788 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
789 (u16 *)__LC_EXT_CPU_ADDR);
790 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
791 &vcpu->arch.sie_block->gpsw,
792 sizeof(psw_t));
793 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
794 &vcpu->arch.sie_block->gpsw,
795 sizeof(psw_t));
796 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
797 (u32 *)__LC_EXT_PARAMS);
798 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
799 (u64 *)__LC_EXT_PARAMS2);
800 kfree(inti);
801 }
99e20009 802 return rc ? -EFAULT : 0;
0fb97abe
JF		 803}
804
805static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
6d3da241 806 unsigned long irq_type)
0fb97abe 807{
6d3da241
JF		 808 struct list_head *isc_list;
809 struct kvm_s390_float_interrupt *fi;
810 struct kvm_s390_interrupt_info *inti = NULL;
811 int rc = 0;
0fb97abe 812
6d3da241 813 fi = &vcpu->kvm->arch.float_int;
8712836b 814
6d3da241
JF		 815 spin_lock(&fi->lock);
816 isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0];
817 inti = list_first_entry_or_null(isc_list,
818 struct kvm_s390_interrupt_info,
819 list);
820 if (inti) {
dcc98ea6
CB		 821 if (inti->type & KVM_S390_INT_IO_AI_MASK)
822 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)");
823 else
824 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x",
825 inti->io.subchannel_id >> 8,
826 inti->io.subchannel_id >> 1 & 0x3,
827 inti->io.subchannel_nr);
828
6d3da241
JF		 829 vcpu->stat.deliver_io_int++;
830 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
831 inti->type,
832 ((__u32)inti->io.subchannel_id << 16) |
833 inti->io.subchannel_nr,
834 ((__u64)inti->io.io_int_parm << 32) |
835 inti->io.io_int_word);
836 list_del(&inti->list);
837 fi->counters[FIRQ_CNTR_IO] -= 1;
838 }
839 if (list_empty(isc_list))
840 clear_bit(irq_type, &fi->pending_irqs);
841 spin_unlock(&fi->lock);
842
843 if (inti) {
844 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
845 (u16 *)__LC_SUBCHANNEL_ID);
846 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
847 (u16 *)__LC_SUBCHANNEL_NR);
848 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
849 (u32 *)__LC_IO_INT_PARM);
850 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
851 (u32 *)__LC_IO_INT_WORD);
852 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
853 &vcpu->arch.sie_block->gpsw,
854 sizeof(psw_t));
855 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
856 &vcpu->arch.sie_block->gpsw,
857 sizeof(psw_t));
858 kfree(inti);
859 }
383d0b05 860
99e20009 861 return rc ? -EFAULT : 0;
383d0b05
JF		 862}
863
864typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
865
866static const deliver_irq_t deliver_irq_funcs[] = {
867 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
6d3da241 868 [IRQ_PEND_MCHK_REP] = __deliver_machine_check,
383d0b05
JF		 869 [IRQ_PEND_PROG] = __deliver_prog,
870 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
871 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
872 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
873 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
874 [IRQ_PEND_RESTART] = __deliver_restart,
383d0b05
JF		 875 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
876 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
6d3da241
JF		 877 [IRQ_PEND_EXT_SERVICE] = __deliver_service,
878 [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done,
879 [IRQ_PEND_VIRTIO] = __deliver_virtio,
383d0b05
JF		 880};
881
ea5f4969
DH		 882/* Check whether an external call is pending (deliverable or not) */
883int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 884{
ea5f4969 885 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
4953919f 886
37c5f6c8 887 if (!sclp.has_sigpif)
ea5f4969 888 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 889
a5bd7647 890 return sca_ext_call_pending(vcpu, NULL);
4953919f
DH		 891}
892
9a022067 893int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 894{
4d32ad6b
DH		 895 if (deliverable_irqs(vcpu))
896 return 1;
ba5c1e9b 897
4d32ad6b
DH		 898 if (kvm_cpu_has_pending_timer(vcpu))
899 return 1;
ba5c1e9b 900
ea5f4969 901 /* external call pending and deliverable */
4d32ad6b 902 if (kvm_s390_ext_call_pending(vcpu) &&
ea5f4969
DH		 903 !psw_extint_disabled(vcpu) &&
904 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
4d32ad6b 905 return 1;
4953919f 906
4d32ad6b
DH		 907 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
908 return 1;
909 return 0;
ba5c1e9b
CO		 910}
911
3d80840d
MT		 912int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
913{
b4aec925 914 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
3d80840d
MT		 915}
916
b3c17f10
DH		 917static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
918{
919 u64 now, cputm, sltime = 0;
920
921 if (ckc_interrupts_enabled(vcpu)) {
922 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
923 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
924 /* already expired or overflow? */
925 if (!sltime || vcpu->arch.sie_block->ckc <= now)
926 return 0;
927 if (cpu_timer_interrupts_enabled(vcpu)) {
928 cputm = kvm_s390_get_cpu_timer(vcpu);
929 /* already expired? */
930 if (cputm >> 63)
931 return 0;
932 return min(sltime, tod_to_ns(cputm));
933 }
934 } else if (cpu_timer_interrupts_enabled(vcpu)) {
935 sltime = kvm_s390_get_cpu_timer(vcpu);
936 /* already expired? */
937 if (sltime >> 63)
938 return 0;
939 }
940 return sltime;
941}
942
ba5c1e9b
CO		 943int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
944{
b3c17f10 945 u64 sltime;
ba5c1e9b
CO		 946
947 vcpu->stat.exit_wait_state++;
ba5c1e9b 948
0759d068 949 /* fast path */
118b862b 950 if (kvm_arch_vcpu_runnable(vcpu))
0759d068 951 return 0;
e52b2af5 952
ba5c1e9b
CO		 953 if (psw_interrupts_disabled(vcpu)) {
954 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 955 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 956 }
957
b3c17f10
DH		 958 if (!ckc_interrupts_enabled(vcpu) &&
959 !cpu_timer_interrupts_enabled(vcpu)) {
ba5c1e9b 960 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 961 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 962 goto no_timer;
963 }
964
b3c17f10
DH		 965 sltime = __calculate_sltime(vcpu);
966 if (!sltime)
bda343ef
DH		 967 return 0;
968
969 __set_cpu_idle(vcpu);
ca872302 970 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
b3c17f10 971 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
ba5c1e9b 972no_timer:
800c1065 973 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 974 kvm_vcpu_block(vcpu);
ba5c1e9b 975 __unset_cpu_idle(vcpu);
800c1065
TH		 976 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
977
2d00f759 978 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 979 return 0;
980}
981
0e9c85a5
DH		 982void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
983{
3491caf2
CB		 984 /*
985 * We cannot move this into the if, as the CPU might be already
986 * in kvm_vcpu_block without having the waitqueue set (polling)
987 */
988 vcpu->valid_wakeup = true;
8577370f 989 if (swait_active(&vcpu->wq)) {
0e9c85a5
DH		 990 /*
991 * The vcpu gave up the cpu voluntarily, mark it as a good
992 * yield-candidate.
993 */
994 vcpu->preempted = true;
8577370f 995 swake_up(&vcpu->wq);
ce2e4f0b 996 vcpu->stat.halt_wakeup++;
0e9c85a5 997 }
adbf1698
DH		 998 /*
999 * The VCPU might not be sleeping but is executing the VSIE. Let's
1000 * kick it, so it leaves the SIE to process the request.
1001 */
1002 kvm_s390_vsie_kick(vcpu);
0e9c85a5
DH		 1003}
1004
ca872302
CB		 1005enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
1006{
1007 struct kvm_vcpu *vcpu;
b3c17f10 1008 u64 sltime;
ca872302
CB		 1009
1010 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
b3c17f10 1011 sltime = __calculate_sltime(vcpu);
ca872302 1012
2d00f759
DH		 1013 /*
1014 * If the monotonic clock runs faster than the tod clock we might be
1015 * woken up too early and have to go back to sleep to avoid deadlocks.
1016 */
b3c17f10 1017 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime)))
2d00f759
DH		 1018 return HRTIMER_RESTART;
1019 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 1020 return HRTIMER_NORESTART;
1021}
ba5c1e9b 1022
2ed10cc1
JF		 1023void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
1024{
1025 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 1026
4ae3c081 1027 spin_lock(&li->lock);
383d0b05
JF		 1028 li->pending_irqs = 0;
1029 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
1030 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 1031 spin_unlock(&li->lock);
4953919f 1032
a5bd7647 1033 sca_clear_ext_call(vcpu);
2ed10cc1
JF		 1034}
1035
614aeab4 1036int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 1037{
180c12fb 1038 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1039 deliver_irq_t func;
79395031 1040 int rc = 0;
383d0b05 1041 unsigned long irq_type;
6d3da241 1042 unsigned long irqs;
ba5c1e9b
CO		 1043
1044 __reset_intercept_indicators(vcpu);
ba5c1e9b 1045
383d0b05
JF		 1046 /* pending ckc conditions might have been invalidated */
1047 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
b4aec925 1048 if (ckc_irq_pending(vcpu))
383d0b05
JF		 1049 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1050
b4aec925
DH		 1051 /* pending cpu timer conditions might have been invalidated */
1052 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1053 if (cpu_timer_irq_pending(vcpu))
1054 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1055
ffeca0ae 1056 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
383d0b05 1057 /* bits are in the order of interrupt priority */
6d3da241 1058 irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT);
6d3da241
JF		 1059 if (is_ioirq(irq_type)) {
1060 rc = __deliver_io(vcpu, irq_type);
1061 } else {
1062 func = deliver_irq_funcs[irq_type];
1063 if (!func) {
1064 WARN_ON_ONCE(func == NULL);
1065 clear_bit(irq_type, &li->pending_irqs);
1066 continue;
1067 }
1068 rc = func(vcpu);
383d0b05 1069 }
ffeca0ae 1070 }
383d0b05 1071
6d3da241 1072 set_intercept_indicators(vcpu);
79395031
JF		 1073
1074 return rc;
ba5c1e9b
CO		 1075}
1076
383d0b05 1077static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1078{
1079 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1080
ed2afcfa
DH		 1081 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1082 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1083 irq->u.pgm.code, 0);
1084
634790b8
DH		 1085 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) {
1086 /* auto detection if no valid ILC was given */
1087 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK;
1088 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu);
1089 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID;
1090 }
1091
238293b1
DH		 1092 if (irq->u.pgm.code == PGM_PER) {
1093 li->irq.pgm.code |= PGM_PER;
634790b8 1094 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1095 /* only modify PER related information */
1096 li->irq.pgm.per_address = irq->u.pgm.per_address;
1097 li->irq.pgm.per_code = irq->u.pgm.per_code;
1098 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1099 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1100 } else if (!(irq->u.pgm.code & PGM_PER)) {
1101 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1102 irq->u.pgm.code;
634790b8 1103 li->irq.pgm.flags = irq->u.pgm.flags;
238293b1
DH		 1104 /* only modify non-PER information */
1105 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1106 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1107 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1108 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1109 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1110 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1111 } else {
1112 li->irq.pgm = irq->u.pgm;
1113 }
9185124e 1114 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 1115 return 0;
1116}
1117
383d0b05 1118static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1119{
1120 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1121
3f24ba15
CB		 1122 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1123 irq->u.ext.ext_params2);
383d0b05
JF		 1124 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1125 irq->u.ext.ext_params,
ed2afcfa 1126 irq->u.ext.ext_params2);
383d0b05
JF		 1127
1128 li->irq.ext = irq->u.ext;
1129 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
805de8f4 1130 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1131 return 0;
1132}
1133
0675d92d 1134static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1135{
1136 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1137 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1138 uint16_t src_id = irq->u.extcall.code;
0146a7b0 1139
3f24ba15 1140 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
ea5f4969 1141 src_id);
383d0b05 1142 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ed2afcfa 1143 src_id, 0);
ea5f4969
DH		 1144
1145 /* sending vcpu invalid */
152e9f65 1146 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
ea5f4969
DH		 1147 return -EINVAL;
1148
37c5f6c8 1149 if (sclp.has_sigpif)
a5bd7647 1150 return sca_inject_ext_call(vcpu, src_id);
383d0b05 1151
b938eace 1152 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
ea5f4969 1153 return -EBUSY;
383d0b05 1154 *extcall = irq->u.extcall;
805de8f4 1155 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1156 return 0;
1157}
1158
383d0b05 1159static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1160{
1161 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1162 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0 1163
ed2afcfa 1164 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
556cc0da 1165 irq->u.prefix.address);
383d0b05 1166 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
ed2afcfa 1167 irq->u.prefix.address, 0);
383d0b05 1168
a3a9c59a
DH		 1169 if (!is_vcpu_stopped(vcpu))
1170 return -EBUSY;
1171
383d0b05
JF		 1172 *prefix = irq->u.prefix;
1173 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1174 return 0;
1175}
1176
6cddd432 1177#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1178static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1179{
1180 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1181 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1182 int rc = 0;
0146a7b0 1183
ed2afcfa 1184 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
383d0b05 1185
2822545f
DH		 1186 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1187 return -EINVAL;
1188
6cddd432
DH		 1189 if (is_vcpu_stopped(vcpu)) {
1190 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1191 rc = kvm_s390_store_status_unloaded(vcpu,
1192 KVM_S390_STORE_STATUS_NOADDR);
1193 return rc;
1194 }
1195
1196 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1197 return -EBUSY;
2822545f 1198 stop->flags = irq->u.stop.flags;
6cddd432 1199 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1200 return 0;
1201}
1202
1203static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1204 struct kvm_s390_irq *irq)
0146a7b0
JF		 1205{
1206 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1207
3f24ba15 1208 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
ed2afcfa 1209 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
383d0b05
JF		 1210
1211 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1212 return 0;
1213}
1214
1215static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1216 struct kvm_s390_irq *irq)
0146a7b0
JF		 1217{
1218 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1219
3f24ba15 1220 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
383d0b05
JF		 1221 irq->u.emerg.code);
1222 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
ed2afcfa 1223 irq->u.emerg.code, 0);
383d0b05 1224
b85de33a
DH		 1225 /* sending vcpu invalid */
1226 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1227 return -EINVAL;
1228
49538d12 1229 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1230 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
805de8f4 1231 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1232 return 0;
1233}
1234
383d0b05 1235static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1236{
1237 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1238 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0 1239
3f24ba15 1240 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
556cc0da 1241 irq->u.mchk.mcic);
383d0b05 1242 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
ed2afcfa 1243 irq->u.mchk.mcic);
383d0b05
JF		 1244
1245 /*
fc2020cf
JF		 1246 * Because repressible machine checks can be indicated along with
1247 * exigent machine checks (PoP, Chapter 11, Interruption action)
1248 * we need to combine cr14, mcic and external damage code.
1249 * Failing storage address and the logout area should not be or'ed
1250 * together, we just indicate the last occurrence of the corresponding
1251 * machine check
383d0b05 1252 */
fc2020cf 1253 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1254 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1255 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1256 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1257 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1258 sizeof(mchk->fixed_logout));
383d0b05
JF		 1259 if (mchk->mcic & MCHK_EX_MASK)
1260 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1261 else if (mchk->mcic & MCHK_REP_MASK)
1262 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1263 return 0;
1264}
1265
383d0b05 1266static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1267{
1268 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1269
3f24ba15 1270 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
383d0b05 1271 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
ed2afcfa 1272 0, 0);
383d0b05
JF		 1273
1274 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
805de8f4 1275 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1276 return 0;
1277}
1278
383d0b05 1279static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1280{
1281 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1282
3f24ba15 1283 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
383d0b05 1284 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
ed2afcfa 1285 0, 0);
383d0b05
JF		 1286
1287 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
805de8f4 1288 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
ba5c1e9b
CO		 1289 return 0;
1290}
1291
6d3da241
JF		 1292static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1293 int isc, u32 schid)
1294{
1295 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1296 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1297 struct kvm_s390_interrupt_info *iter;
1298 u16 id = (schid & 0xffff0000U) >> 16;
1299 u16 nr = schid & 0x0000ffffU;
1300
1301 spin_lock(&fi->lock);
1302 list_for_each_entry(iter, isc_list, list) {
1303 if (schid && (id != iter->io.subchannel_id ||
1304 nr != iter->io.subchannel_nr))
1305 continue;
1306 /* found an appropriate entry */
1307 list_del_init(&iter->list);
1308 fi->counters[FIRQ_CNTR_IO] -= 1;
1309 if (list_empty(isc_list))
1310 clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
1311 spin_unlock(&fi->lock);
1312 return iter;
1313 }
1314 spin_unlock(&fi->lock);
1315 return NULL;
1316}
383d0b05 1317
6d3da241
JF		 1318/*
1319 * Dequeue and return an I/O interrupt matching any of the interruption
1320 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
1321 */
fa6b7fe9 1322struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241
JF		 1323 u64 isc_mask, u32 schid)
1324{
1325 struct kvm_s390_interrupt_info *inti = NULL;
1326 int isc;
1327
1328 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1329 if (isc_mask & isc_to_isc_bits(isc))
1330 inti = get_io_int(kvm, isc, schid);
1331 }
1332 return inti;
1333}
1334
1335#define SCCB_MASK 0xFFFFFFF8
1336#define SCCB_EVENT_PENDING 0x3
1337
1338static int __inject_service(struct kvm *kvm,
1339 struct kvm_s390_interrupt_info *inti)
1340{
1341 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1342
1343 spin_lock(&fi->lock);
1344 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1345 /*
1346 * Early versions of the QEMU s390 bios will inject several
1347 * service interrupts after another without handling a
1348 * condition code indicating busy.
1349 * We will silently ignore those superfluous sccb values.
1350 * A future version of QEMU will take care of serialization
1351 * of servc requests
1352 */
1353 if (fi->srv_signal.ext_params & SCCB_MASK)
1354 goto out;
1355 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1356 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1357out:
1358 spin_unlock(&fi->lock);
1359 kfree(inti);
1360 return 0;
1361}
1362
1363static int __inject_virtio(struct kvm *kvm,
1364 struct kvm_s390_interrupt_info *inti)
1365{
1366 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1367
1368 spin_lock(&fi->lock);
1369 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1370 spin_unlock(&fi->lock);
1371 return -EBUSY;
1372 }
1373 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1374 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1375 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1376 spin_unlock(&fi->lock);
1377 return 0;
1378}
1379
1380static int __inject_pfault_done(struct kvm *kvm,
1381 struct kvm_s390_interrupt_info *inti)
1382{
1383 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1384
1385 spin_lock(&fi->lock);
1386 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1387 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1388 spin_unlock(&fi->lock);
1389 return -EBUSY;
1390 }
1391 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1392 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1393 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1394 spin_unlock(&fi->lock);
1395 return 0;
1396}
1397
1398#define CR_PENDING_SUBCLASS 28
1399static int __inject_float_mchk(struct kvm *kvm,
1400 struct kvm_s390_interrupt_info *inti)
1401{
1402 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1403
1404 spin_lock(&fi->lock);
1405 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1406 fi->mchk.mcic |= inti->mchk.mcic;
1407 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1408 spin_unlock(&fi->lock);
1409 kfree(inti);
1410 return 0;
1411}
1412
1413static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
fa6b7fe9
CH		 1414{
1415 struct kvm_s390_float_interrupt *fi;
6d3da241
JF		 1416 struct list_head *list;
1417 int isc;
fa6b7fe9 1418
fa6b7fe9
CH		 1419 fi = &kvm->arch.float_int;
1420 spin_lock(&fi->lock);
6d3da241
JF		 1421 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1422 spin_unlock(&fi->lock);
1423 return -EBUSY;
a91b8ebe 1424 }
6d3da241
JF		 1425 fi->counters[FIRQ_CNTR_IO] += 1;
1426
dcc98ea6
CB		 1427 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1428 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)");
1429 else
1430 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x",
1431 inti->io.subchannel_id >> 8,
1432 inti->io.subchannel_id >> 1 & 0x3,
1433 inti->io.subchannel_nr);
6d3da241
JF		 1434 isc = int_word_to_isc(inti->io.io_int_word);
1435 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1436 list_add_tail(&inti->list, list);
1437 set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
fa6b7fe9 1438 spin_unlock(&fi->lock);
6d3da241 1439 return 0;
fa6b7fe9 1440}
ba5c1e9b 1441
96e0ed23
DH		 1442/*
1443 * Find a destination VCPU for a floating irq and kick it.
1444 */
1445static void __floating_irq_kick(struct kvm *kvm, u64 type)
ba5c1e9b 1446{
96e0ed23 1447 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
180c12fb 1448 struct kvm_s390_local_interrupt *li;
96e0ed23
DH		 1449 struct kvm_vcpu *dst_vcpu;
1450 int sigcpu, online_vcpus, nr_tries = 0;
1451
1452 online_vcpus = atomic_read(&kvm->online_vcpus);
1453 if (!online_vcpus)
1454 return;
1455
1456 /* find idle VCPUs first, then round robin */
1457 sigcpu = find_first_bit(fi->idle_mask, online_vcpus);
1458 if (sigcpu == online_vcpus) {
1459 do {
1460 sigcpu = fi->next_rr_cpu;
1461 fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus;
1462 /* avoid endless loops if all vcpus are stopped */
1463 if (nr_tries++ >= online_vcpus)
1464 return;
1465 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1466 }
1467 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1468
1469 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
1470 li = &dst_vcpu->arch.local_int;
1471 spin_lock(&li->lock);
1472 switch (type) {
1473 case KVM_S390_MCHK:
805de8f4 1474 atomic_or(CPUSTAT_STOP_INT, li->cpuflags);
96e0ed23
DH		 1475 break;
1476 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
805de8f4 1477 atomic_or(CPUSTAT_IO_INT, li->cpuflags);
96e0ed23
DH		 1478 break;
1479 default:
805de8f4 1480 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
96e0ed23
DH		 1481 break;
1482 }
1483 spin_unlock(&li->lock);
1484 kvm_s390_vcpu_wakeup(dst_vcpu);
1485}
1486
1487static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1488{
6d3da241
JF		 1489 u64 type = READ_ONCE(inti->type);
1490 int rc;
ba5c1e9b 1491
6d3da241
JF		 1492 switch (type) {
1493 case KVM_S390_MCHK:
1494 rc = __inject_float_mchk(kvm, inti);
1495 break;
1496 case KVM_S390_INT_VIRTIO:
1497 rc = __inject_virtio(kvm, inti);
1498 break;
1499 case KVM_S390_INT_SERVICE:
1500 rc = __inject_service(kvm, inti);
1501 break;
1502 case KVM_S390_INT_PFAULT_DONE:
1503 rc = __inject_pfault_done(kvm, inti);
1504 break;
1505 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1506 rc = __inject_io(kvm, inti);
1507 break;
1508 default:
a91b8ebe 1509 rc = -EINVAL;
c05c4186 1510 }
6d3da241
JF		 1511 if (rc)
1512 return rc;
1513
96e0ed23 1514 __floating_irq_kick(kvm, type);
6d3da241 1515 return 0;
c05c4186
JF		 1516}
1517
1518int kvm_s390_inject_vm(struct kvm *kvm,
1519 struct kvm_s390_interrupt *s390int)
1520{
1521 struct kvm_s390_interrupt_info *inti;
428d53be 1522 int rc;
c05c4186 1523
ba5c1e9b
CO		 1524 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1525 if (!inti)
1526 return -ENOMEM;
1527
c05c4186
JF		 1528 inti->type = s390int->type;
1529 switch (inti->type) {
ba5c1e9b 1530 case KVM_S390_INT_VIRTIO:
33e19115 1531 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1532 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1533 inti->ext.ext_params = s390int->parm;
1534 inti->ext.ext_params2 = s390int->parm64;
1535 break;
1536 case KVM_S390_INT_SERVICE:
3f24ba15 1537 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1538 inti->ext.ext_params = s390int->parm;
1539 break;
3c038e6b 1540 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 1541 inti->ext.ext_params2 = s390int->parm64;
1542 break;
48a3e950 1543 case KVM_S390_MCHK:
3f24ba15 1544 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
48a3e950 1545 s390int->parm64);
48a3e950
CH		 1546 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1547 inti->mchk.mcic = s390int->parm64;
1548 break;
d8346b7d 1549 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
d8346b7d
CH		 1550 inti->io.subchannel_id = s390int->parm >> 16;
1551 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1552 inti->io.io_int_parm = s390int->parm64 >> 32;
1553 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1554 break;
ba5c1e9b
CO		 1555 default:
1556 kfree(inti);
1557 return -EINVAL;
1558 }
ade38c31
CH		 1559 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1560 2);
ba5c1e9b 1561
428d53be
DH		 1562 rc = __inject_vm(kvm, inti);
1563 if (rc)
1564 kfree(inti);
1565 return rc;
ba5c1e9b
CO		 1566}
1567
15462e37 1568int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 1569 struct kvm_s390_interrupt_info *inti)
1570{
15462e37 1571 return __inject_vm(kvm, inti);
2f32d4ea
CH		 1572}
1573
383d0b05
JF		 1574int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1575 struct kvm_s390_irq *irq)
1576{
1577 irq->type = s390int->type;
1578 switch (irq->type) {
1579 case KVM_S390_PROGRAM_INT:
1580 if (s390int->parm & 0xffff0000)
1581 return -EINVAL;
1582 irq->u.pgm.code = s390int->parm;
1583 break;
1584 case KVM_S390_SIGP_SET_PREFIX:
1585 irq->u.prefix.address = s390int->parm;
1586 break;
2822545f
DH		 1587 case KVM_S390_SIGP_STOP:
1588 irq->u.stop.flags = s390int->parm;
1589 break;
383d0b05 1590 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 1591 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1592 return -EINVAL;
1593 irq->u.extcall.code = s390int->parm;
1594 break;
1595 case KVM_S390_INT_EMERGENCY:
94d1f564 1596 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1597 return -EINVAL;
1598 irq->u.emerg.code = s390int->parm;
1599 break;
1600 case KVM_S390_MCHK:
1601 irq->u.mchk.mcic = s390int->parm64;
1602 break;
1603 }
1604 return 0;
1605}
1606
6cddd432
DH		 1607int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1608{
1609 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1610
1611 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1612}
1613
1614void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1615{
1616 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1617
1618 spin_lock(&li->lock);
1619 li->irq.stop.flags = 0;
1620 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1621 spin_unlock(&li->lock);
1622}
1623
79e87a10 1624static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 1625{
0146a7b0 1626 int rc;
ba5c1e9b 1627
383d0b05 1628 switch (irq->type) {
ba5c1e9b 1629 case KVM_S390_PROGRAM_INT:
383d0b05 1630 rc = __inject_prog(vcpu, irq);
ba5c1e9b 1631 break;
b7e6e4d3 1632 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 1633 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 1634 break;
ba5c1e9b 1635 case KVM_S390_SIGP_STOP:
383d0b05 1636 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 1637 break;
ba5c1e9b 1638 case KVM_S390_RESTART:
383d0b05 1639 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 1640 break;
e029ae5b 1641 case KVM_S390_INT_CLOCK_COMP:
383d0b05 1642 rc = __inject_ckc(vcpu);
0146a7b0 1643 break;
e029ae5b 1644 case KVM_S390_INT_CPU_TIMER:
383d0b05 1645 rc = __inject_cpu_timer(vcpu);
82a12737 1646 break;
7697e71f 1647 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 1648 rc = __inject_extcall(vcpu, irq);
82a12737 1649 break;
ba5c1e9b 1650 case KVM_S390_INT_EMERGENCY:
383d0b05 1651 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 1652 break;
48a3e950 1653 case KVM_S390_MCHK:
383d0b05 1654 rc = __inject_mchk(vcpu, irq);
48a3e950 1655 break;
3c038e6b 1656 case KVM_S390_INT_PFAULT_INIT:
383d0b05 1657 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 1658 break;
ba5c1e9b
CO		 1659 case KVM_S390_INT_VIRTIO:
1660 case KVM_S390_INT_SERVICE:
d8346b7d 1661 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 1662 default:
0146a7b0 1663 rc = -EINVAL;
ba5c1e9b 1664 }
79e87a10
JF		 1665
1666 return rc;
1667}
1668
1669int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1670{
1671 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1672 int rc;
1673
1674 spin_lock(&li->lock);
1675 rc = do_inject_vcpu(vcpu, irq);
4ae3c081 1676 spin_unlock(&li->lock);
0146a7b0
JF		 1677 if (!rc)
1678 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 1679 return rc;
ba5c1e9b 1680}
c05c4186 1681
6d3da241 1682static inline void clear_irq_list(struct list_head *_list)
c05c4186 1683{
6d3da241 1684 struct kvm_s390_interrupt_info *inti, *n;
c05c4186 1685
6d3da241 1686 list_for_each_entry_safe(inti, n, _list, list) {
c05c4186
JF		 1687 list_del(&inti->list);
1688 kfree(inti);
1689 }
c05c4186
JF		 1690}
1691
94aa033e
JF		 1692static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
1693 struct kvm_s390_irq *irq)
c05c4186 1694{
94aa033e 1695 irq->type = inti->type;
c05c4186 1696 switch (inti->type) {
3c038e6b
DD		 1697 case KVM_S390_INT_PFAULT_INIT:
1698 case KVM_S390_INT_PFAULT_DONE:
c05c4186 1699 case KVM_S390_INT_VIRTIO:
94aa033e 1700 irq->u.ext = inti->ext;
c05c4186
JF		 1701 break;
1702 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 1703 irq->u.io = inti->io;
c05c4186 1704 break;
c05c4186 1705 }
c05c4186
JF		 1706}
1707
6d3da241
JF		 1708void kvm_s390_clear_float_irqs(struct kvm *kvm)
1709{
1710 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1711 int i;
1712
1713 spin_lock(&fi->lock);
f2ae45ed
JF		 1714 fi->pending_irqs = 0;
1715 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
1716 memset(&fi->mchk, 0, sizeof(fi->mchk));
6d3da241
JF		 1717 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1718 clear_irq_list(&fi->lists[i]);
1719 for (i = 0; i < FIRQ_MAX_COUNT; i++)
1720 fi->counters[i] = 0;
1721 spin_unlock(&fi->lock);
1722};
1723
94aa033e 1724static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186
JF		 1725{
1726 struct kvm_s390_interrupt_info *inti;
1727 struct kvm_s390_float_interrupt *fi;
94aa033e 1728 struct kvm_s390_irq *buf;
6d3da241 1729 struct kvm_s390_irq *irq;
94aa033e 1730 int max_irqs;
c05c4186
JF		 1731 int ret = 0;
1732 int n = 0;
6d3da241 1733 int i;
c05c4186 1734
94aa033e
JF		 1735 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
1736 return -EINVAL;
1737
1738 /*
1739 * We are already using -ENOMEM to signal
1740 * userspace it may retry with a bigger buffer,
1741 * so we need to use something else for this case
1742 */
1743 buf = vzalloc(len);
1744 if (!buf)
1745 return -ENOBUFS;
1746
1747 max_irqs = len / sizeof(struct kvm_s390_irq);
1748
c05c4186
JF		 1749 fi = &kvm->arch.float_int;
1750 spin_lock(&fi->lock);
6d3da241
JF		 1751 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
1752 list_for_each_entry(inti, &fi->lists[i], list) {
1753 if (n == max_irqs) {
1754 /* signal userspace to try again */
1755 ret = -ENOMEM;
1756 goto out;
1757 }
1758 inti_to_irq(inti, &buf[n]);
1759 n++;
1760 }
1761 }
1762 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
94aa033e 1763 if (n == max_irqs) {
c05c4186
JF		 1764 /* signal userspace to try again */
1765 ret = -ENOMEM;
6d3da241 1766 goto out;
c05c4186 1767 }
6d3da241
JF		 1768 irq = (struct kvm_s390_irq *) &buf[n];
1769 irq->type = KVM_S390_INT_SERVICE;
1770 irq->u.ext = fi->srv_signal;
c05c4186
JF		 1771 n++;
1772 }
6d3da241
JF		 1773 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
1774 if (n == max_irqs) {
1775 /* signal userspace to try again */
1776 ret = -ENOMEM;
1777 goto out;
1778 }
1779 irq = (struct kvm_s390_irq *) &buf[n];
1780 irq->type = KVM_S390_MCHK;
1781 irq->u.mchk = fi->mchk;
1782 n++;
1783}
1784
1785out:
c05c4186 1786 spin_unlock(&fi->lock);
94aa033e
JF		 1787 if (!ret && n > 0) {
1788 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
1789 ret = -EFAULT;
1790 }
1791 vfree(buf);
c05c4186
JF		 1792
1793 return ret < 0 ? ret : n;
1794}
1795
1796static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1797{
1798 int r;
1799
1800 switch (attr->group) {
1801 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 1802 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 1803 attr->attr);
1804 break;
1805 default:
1806 r = -EINVAL;
1807 }
1808
1809 return r;
1810}
1811
1812static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1813 u64 addr)
1814{
1815 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1816 void *target = NULL;
1817 void __user *source;
1818 u64 size;
1819
1820 if (get_user(inti->type, (u64 __user *)addr))
1821 return -EFAULT;
1822
1823 switch (inti->type) {
3c038e6b
DD		 1824 case KVM_S390_INT_PFAULT_INIT:
1825 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1826 case KVM_S390_INT_VIRTIO:
1827 case KVM_S390_INT_SERVICE:
1828 target = (void *) &inti->ext;
1829 source = &uptr->u.ext;
1830 size = sizeof(inti->ext);
1831 break;
1832 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1833 target = (void *) &inti->io;
1834 source = &uptr->u.io;
1835 size = sizeof(inti->io);
1836 break;
1837 case KVM_S390_MCHK:
1838 target = (void *) &inti->mchk;
1839 source = &uptr->u.mchk;
1840 size = sizeof(inti->mchk);
1841 break;
1842 default:
1843 return -EINVAL;
1844 }
1845
1846 if (copy_from_user(target, source, size))
1847 return -EFAULT;
1848
1849 return 0;
1850}
1851
1852static int enqueue_floating_irq(struct kvm_device *dev,
1853 struct kvm_device_attr *attr)
1854{
1855 struct kvm_s390_interrupt_info *inti = NULL;
1856 int r = 0;
1857 int len = attr->attr;
1858
1859 if (len % sizeof(struct kvm_s390_irq) != 0)
1860 return -EINVAL;
1861 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1862 return -EINVAL;
1863
1864 while (len >= sizeof(struct kvm_s390_irq)) {
1865 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1866 if (!inti)
1867 return -ENOMEM;
1868
1869 r = copy_irq_from_user(inti, attr->addr);
1870 if (r) {
1871 kfree(inti);
1872 return r;
1873 }
a91b8ebe
JF		 1874 r = __inject_vm(dev->kvm, inti);
1875 if (r) {
1876 kfree(inti);
1877 return r;
1878 }
c05c4186
JF		 1879 len -= sizeof(struct kvm_s390_irq);
1880 attr->addr += sizeof(struct kvm_s390_irq);
1881 }
1882
1883 return r;
1884}
1885
841b91c5
CH		 1886static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1887{
1888 if (id >= MAX_S390_IO_ADAPTERS)
1889 return NULL;
1890 return kvm->arch.adapters[id];
1891}
1892
1893static int register_io_adapter(struct kvm_device *dev,
1894 struct kvm_device_attr *attr)
1895{
1896 struct s390_io_adapter *adapter;
1897 struct kvm_s390_io_adapter adapter_info;
1898
1899 if (copy_from_user(&adapter_info,
1900 (void __user *)attr->addr, sizeof(adapter_info)))
1901 return -EFAULT;
1902
1903 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1904 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1905 return -EINVAL;
1906
1907 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1908 if (!adapter)
1909 return -ENOMEM;
1910
1911 INIT_LIST_HEAD(&adapter->maps);
1912 init_rwsem(&adapter->maps_lock);
1913 atomic_set(&adapter->nr_maps, 0);
1914 adapter->id = adapter_info.id;
1915 adapter->isc = adapter_info.isc;
1916 adapter->maskable = adapter_info.maskable;
1917 adapter->masked = false;
1918 adapter->swap = adapter_info.swap;
1919 dev->kvm->arch.adapters[adapter->id] = adapter;
1920
1921 return 0;
1922}
1923
1924int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1925{
1926 int ret;
1927 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1928
1929 if (!adapter || !adapter->maskable)
1930 return -EINVAL;
1931 ret = adapter->masked;
1932 adapter->masked = masked;
1933 return ret;
1934}
1935
1936static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1937{
1938 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1939 struct s390_map_info *map;
1940 int ret;
1941
1942 if (!adapter || !addr)
1943 return -EINVAL;
1944
1945 map = kzalloc(sizeof(*map), GFP_KERNEL);
1946 if (!map) {
1947 ret = -ENOMEM;
1948 goto out;
1949 }
1950 INIT_LIST_HEAD(&map->list);
1951 map->guest_addr = addr;
6e0a0431 1952 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 1953 if (map->addr == -EFAULT) {
1954 ret = -EFAULT;
1955 goto out;
1956 }
1957 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1958 if (ret < 0)
1959 goto out;
1960 BUG_ON(ret != 1);
1961 down_write(&adapter->maps_lock);
1962 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1963 list_add_tail(&map->list, &adapter->maps);
1964 ret = 0;
1965 } else {
1966 put_page(map->page);
1967 ret = -EINVAL;
1968 }
1969 up_write(&adapter->maps_lock);
1970out:
1971 if (ret)
1972 kfree(map);
1973 return ret;
1974}
1975
1976static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1977{
1978 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1979 struct s390_map_info *map, *tmp;
1980 int found = 0;
1981
1982 if (!adapter || !addr)
1983 return -EINVAL;
1984
1985 down_write(&adapter->maps_lock);
1986 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1987 if (map->guest_addr == addr) {
1988 found = 1;
1989 atomic_dec(&adapter->nr_maps);
1990 list_del(&map->list);
1991 put_page(map->page);
1992 kfree(map);
1993 break;
1994 }
1995 }
1996 up_write(&adapter->maps_lock);
1997
1998 return found ? 0 : -EINVAL;
1999}
2000
2001void kvm_s390_destroy_adapters(struct kvm *kvm)
2002{
2003 int i;
2004 struct s390_map_info *map, *tmp;
2005
2006 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
2007 if (!kvm->arch.adapters[i])
2008 continue;
2009 list_for_each_entry_safe(map, tmp,
2010 &kvm->arch.adapters[i]->maps, list) {
2011 list_del(&map->list);
2012 put_page(map->page);
2013 kfree(map);
2014 }
2015 kfree(kvm->arch.adapters[i]);
2016 }
2017}
2018
2019static int modify_io_adapter(struct kvm_device *dev,
2020 struct kvm_device_attr *attr)
2021{
2022 struct kvm_s390_io_adapter_req req;
2023 struct s390_io_adapter *adapter;
2024 int ret;
2025
2026 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2027 return -EFAULT;
2028
2029 adapter = get_io_adapter(dev->kvm, req.id);
2030 if (!adapter)
2031 return -EINVAL;
2032 switch (req.type) {
2033 case KVM_S390_IO_ADAPTER_MASK:
2034 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
2035 if (ret > 0)
2036 ret = 0;
2037 break;
2038 case KVM_S390_IO_ADAPTER_MAP:
2039 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
2040 break;
2041 case KVM_S390_IO_ADAPTER_UNMAP:
2042 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
2043 break;
2044 default:
2045 ret = -EINVAL;
2046 }
2047
2048 return ret;
2049}
2050
6d28f789
HP		 2051static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
2052
2053{
2054 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
2055 u32 schid;
2056
2057 if (attr->flags)
2058 return -EINVAL;
2059 if (attr->attr != sizeof(schid))
2060 return -EINVAL;
2061 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
2062 return -EFAULT;
2063 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
2064 /*
2065 * If userspace is conforming to the architecture, we can have at most
2066 * one pending I/O interrupt per subchannel, so this is effectively a
2067 * clear all.
2068 */
2069 return 0;
2070}
2071
c05c4186
JF		 2072static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2073{
2074 int r = 0;
3c038e6b
DD		 2075 unsigned int i;
2076 struct kvm_vcpu *vcpu;
c05c4186
JF		 2077
2078 switch (attr->group) {
2079 case KVM_DEV_FLIC_ENQUEUE:
2080 r = enqueue_floating_irq(dev, attr);
2081 break;
2082 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 2083 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 2084 break;
3c038e6b
DD		 2085 case KVM_DEV_FLIC_APF_ENABLE:
2086 dev->kvm->arch.gmap->pfault_enabled = 1;
2087 break;
2088 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2089 dev->kvm->arch.gmap->pfault_enabled = 0;
2090 /*
2091 * Make sure no async faults are in transition when
2092 * clearing the queues. So we don't need to worry
2093 * about late coming workers.
2094 */
2095 synchronize_srcu(&dev->kvm->srcu);
2096 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2097 kvm_clear_async_pf_completion_queue(vcpu);
2098 break;
841b91c5
CH		 2099 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2100 r = register_io_adapter(dev, attr);
2101 break;
2102 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2103 r = modify_io_adapter(dev, attr);
2104 break;
6d28f789
HP		 2105 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2106 r = clear_io_irq(dev->kvm, attr);
2107 break;
c05c4186
JF		 2108 default:
2109 r = -EINVAL;
2110 }
2111
2112 return r;
2113}
2114
4f129858
HP		 2115static int flic_has_attr(struct kvm_device *dev,
2116 struct kvm_device_attr *attr)
2117{
2118 switch (attr->group) {
2119 case KVM_DEV_FLIC_GET_ALL_IRQS:
2120 case KVM_DEV_FLIC_ENQUEUE:
2121 case KVM_DEV_FLIC_CLEAR_IRQS:
2122 case KVM_DEV_FLIC_APF_ENABLE:
2123 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2124 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2125 case KVM_DEV_FLIC_ADAPTER_MODIFY:
6d28f789 2126 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
4f129858
HP		 2127 return 0;
2128 }
2129 return -ENXIO;
2130}
2131
c05c4186
JF		 2132static int flic_create(struct kvm_device *dev, u32 type)
2133{
2134 if (!dev)
2135 return -EINVAL;
2136 if (dev->kvm->arch.flic)
2137 return -EINVAL;
2138 dev->kvm->arch.flic = dev;
2139 return 0;
2140}
2141
2142static void flic_destroy(struct kvm_device *dev)
2143{
2144 dev->kvm->arch.flic = NULL;
2145 kfree(dev);
2146}
2147
2148/* s390 floating irq controller (flic) */
2149struct kvm_device_ops kvm_flic_ops = {
2150 .name = "kvm-flic",
2151 .get_attr = flic_get_attr,
2152 .set_attr = flic_set_attr,
4f129858 2153 .has_attr = flic_has_attr,
c05c4186
JF		 2154 .create = flic_create,
2155 .destroy = flic_destroy,
2156};
84223598
CH		 2157
2158static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2159{
2160 unsigned long bit;
2161
2162 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2163
2164 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2165}
2166
2167static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2168 u64 addr)
2169{
2170 struct s390_map_info *map;
2171
2172 if (!adapter)
2173 return NULL;
2174
2175 list_for_each_entry(map, &adapter->maps, list) {
2176 if (map->guest_addr == addr)
2177 return map;
2178 }
2179 return NULL;
2180}
2181
2182static int adapter_indicators_set(struct kvm *kvm,
2183 struct s390_io_adapter *adapter,
2184 struct kvm_s390_adapter_int *adapter_int)
2185{
2186 unsigned long bit;
2187 int summary_set, idx;
2188 struct s390_map_info *info;
2189 void *map;
2190
2191 info = get_map_info(adapter, adapter_int->ind_addr);
2192 if (!info)
2193 return -1;
2194 map = page_address(info->page);
2195 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2196 set_bit(bit, map);
2197 idx = srcu_read_lock(&kvm->srcu);
2198 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2199 set_page_dirty_lock(info->page);
2200 info = get_map_info(adapter, adapter_int->summary_addr);
2201 if (!info) {
2202 srcu_read_unlock(&kvm->srcu, idx);
2203 return -1;
2204 }
2205 map = page_address(info->page);
2206 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2207 adapter->swap);
2208 summary_set = test_and_set_bit(bit, map);
2209 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2210 set_page_dirty_lock(info->page);
2211 srcu_read_unlock(&kvm->srcu, idx);
2212 return summary_set ? 0 : 1;
2213}
2214
2215/*
2216 * < 0 - not injected due to error
2217 * = 0 - coalesced, summary indicator already active
2218 * > 0 - injected interrupt
2219 */
2220static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2221 struct kvm *kvm, int irq_source_id, int level,
2222 bool line_status)
2223{
2224 int ret;
2225 struct s390_io_adapter *adapter;
2226
2227 /* We're only interested in the 0->1 transition. */
2228 if (!level)
2229 return 0;
2230 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2231 if (!adapter)
2232 return -1;
2233 down_read(&adapter->maps_lock);
2234 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2235 up_read(&adapter->maps_lock);
2236 if ((ret > 0) && !adapter->masked) {
2237 struct kvm_s390_interrupt s390int = {
2238 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2239 .parm = 0,
2240 .parm64 = (adapter->isc << 27) | 0x80000000,
2241 };
2242 ret = kvm_s390_inject_vm(kvm, &s390int);
2243 if (ret == 0)
2244 ret = 1;
2245 }
2246 return ret;
2247}
2248
c63cf538
RK		 2249int kvm_set_routing_entry(struct kvm *kvm,
2250 struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 2251 const struct kvm_irq_routing_entry *ue)
2252{
2253 int ret;
2254
2255 switch (ue->type) {
2256 case KVM_IRQ_ROUTING_S390_ADAPTER:
2257 e->set = set_adapter_int;
2258 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2259 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2260 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2261 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2262 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2263 ret = 0;
2264 break;
2265 default:
2266 ret = -EINVAL;
2267 }
2268
2269 return ret;
2270}
2271
2272int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2273 int irq_source_id, int level, bool line_status)
2274{
2275 return -EINVAL;
2276}
816c7667
JF		 2277
2278int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2279{
2280 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2281 struct kvm_s390_irq *buf;
2282 int r = 0;
2283 int n;
2284
2285 buf = vmalloc(len);
2286 if (!buf)
2287 return -ENOMEM;
2288
2289 if (copy_from_user((void *) buf, irqstate, len)) {
2290 r = -EFAULT;
2291 goto out_free;
2292 }
2293
2294 /*
2295 * Don't allow setting the interrupt state
2296 * when there are already interrupts pending
2297 */
2298 spin_lock(&li->lock);
2299 if (li->pending_irqs) {
2300 r = -EBUSY;
2301 goto out_unlock;
2302 }
2303
2304 for (n = 0; n < len / sizeof(*buf); n++) {
2305 r = do_inject_vcpu(vcpu, &buf[n]);
2306 if (r)
2307 break;
2308 }
2309
2310out_unlock:
2311 spin_unlock(&li->lock);
2312out_free:
2313 vfree(buf);
2314
2315 return r;
2316}
2317
2318static void store_local_irq(struct kvm_s390_local_interrupt *li,
2319 struct kvm_s390_irq *irq,
2320 unsigned long irq_type)
2321{
2322 switch (irq_type) {
2323 case IRQ_PEND_MCHK_EX:
2324 case IRQ_PEND_MCHK_REP:
2325 irq->type = KVM_S390_MCHK;
2326 irq->u.mchk = li->irq.mchk;
2327 break;
2328 case IRQ_PEND_PROG:
2329 irq->type = KVM_S390_PROGRAM_INT;
2330 irq->u.pgm = li->irq.pgm;
2331 break;
2332 case IRQ_PEND_PFAULT_INIT:
2333 irq->type = KVM_S390_INT_PFAULT_INIT;
2334 irq->u.ext = li->irq.ext;
2335 break;
2336 case IRQ_PEND_EXT_EXTERNAL:
2337 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2338 irq->u.extcall = li->irq.extcall;
2339 break;
2340 case IRQ_PEND_EXT_CLOCK_COMP:
2341 irq->type = KVM_S390_INT_CLOCK_COMP;
2342 break;
2343 case IRQ_PEND_EXT_CPU_TIMER:
2344 irq->type = KVM_S390_INT_CPU_TIMER;
2345 break;
2346 case IRQ_PEND_SIGP_STOP:
2347 irq->type = KVM_S390_SIGP_STOP;
2348 irq->u.stop = li->irq.stop;
2349 break;
2350 case IRQ_PEND_RESTART:
2351 irq->type = KVM_S390_RESTART;
2352 break;
2353 case IRQ_PEND_SET_PREFIX:
2354 irq->type = KVM_S390_SIGP_SET_PREFIX;
2355 irq->u.prefix = li->irq.prefix;
2356 break;
2357 }
2358}
2359
2360int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2361{
a5bd7647 2362 int scn;
816c7667
JF		 2363 unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
2364 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2365 unsigned long pending_irqs;
2366 struct kvm_s390_irq irq;
2367 unsigned long irq_type;
2368 int cpuaddr;
2369 int n = 0;
2370
2371 spin_lock(&li->lock);
2372 pending_irqs = li->pending_irqs;
2373 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2374 sizeof(sigp_emerg_pending));
2375 spin_unlock(&li->lock);
2376
2377 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2378 memset(&irq, 0, sizeof(irq));
2379 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2380 continue;
2381 if (n + sizeof(irq) > len)
2382 return -ENOBUFS;
2383 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2384 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2385 return -EFAULT;
2386 n += sizeof(irq);
2387 }
2388
2389 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2390 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2391 memset(&irq, 0, sizeof(irq));
2392 if (n + sizeof(irq) > len)
2393 return -ENOBUFS;
2394 irq.type = KVM_S390_INT_EMERGENCY;
2395 irq.u.emerg.code = cpuaddr;
2396 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2397 return -EFAULT;
2398 n += sizeof(irq);
2399 }
2400 }
2401
a5bd7647 2402 if (sca_ext_call_pending(vcpu, &scn)) {
816c7667
JF		 2403 if (n + sizeof(irq) > len)
2404 return -ENOBUFS;
2405 memset(&irq, 0, sizeof(irq));
2406 irq.type = KVM_S390_INT_EXTERNAL_CALL;
a5bd7647 2407 irq.u.extcall.code = scn;
816c7667
JF		 2408 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2409 return -EFAULT;
2410 n += sizeof(irq);
2411 }
2412
2413 return n;
2414}
Linux 6.x block layer and io_uring tree(s)