projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
KVM: s390: drop out early in kvm_s390_has_irq()
[deliverable/linux.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>
ba5c1e9b
CO		 26#include "kvm-s390.h"
27#include "gaccess.h"
ade38c31 28#include "trace-s390.h"
ba5c1e9b 29
d8346b7d
CH		 30#define IOINT_SCHID_MASK 0x0000ffff
31#define IOINT_SSID_MASK 0x00030000
32#define IOINT_CSSID_MASK 0x03fc0000
44c6ca3d 33#define PFAULT_INIT 0x0600
60f90a14
JF		 34#define PFAULT_DONE 0x0680
35#define VIRTIO_PARAM 0x0d00
d8346b7d 36
3c038e6b 37int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 38{
39 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
40}
41
d8346b7d
CH		 42static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
43{
44 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
45}
46
48a3e950
CH		 47static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
48{
49 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
50}
51
ba5c1e9b
CO		 52static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
53{
fee0e0fd
DH		 54 return psw_extint_disabled(vcpu) &&
55 psw_ioint_disabled(vcpu) &&
56 psw_mchk_disabled(vcpu);
ba5c1e9b
CO		 57}
58
bb78c5ec
DH		 59static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
60{
61 if (psw_extint_disabled(vcpu) ||
62 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
63 return 0;
f71d0dc5
DH		 64 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
65 /* No timer interrupts when single stepping */
66 return 0;
bb78c5ec
DH		 67 return 1;
68}
69
b4aec925
DH		 70static int ckc_irq_pending(struct kvm_vcpu *vcpu)
71{
fdf03650 72 preempt_disable();
b4aec925 73 if (!(vcpu->arch.sie_block->ckc <
fdf03650
FZ		 74 get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) {
75 preempt_enable();
b4aec925 76 return 0;
fdf03650
FZ		 77 }
78 preempt_enable();
b4aec925
DH		 79 return ckc_interrupts_enabled(vcpu);
80}
81
82static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
83{
84 return !psw_extint_disabled(vcpu) &&
85 (vcpu->arch.sie_block->gcr[0] & 0x400ul);
86}
87
88static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
89{
90 return (vcpu->arch.sie_block->cputm >> 63) &&
91 cpu_timer_interrupts_enabled(vcpu);
92}
93
6d3da241 94static inline int is_ioirq(unsigned long irq_type)
79fd50c6 95{
6d3da241
JF		 96 return ((irq_type >= IRQ_PEND_IO_ISC_0) &&
97 (irq_type <= IRQ_PEND_IO_ISC_7));
98}
79fd50c6 99
6d3da241
JF		 100static uint64_t isc_to_isc_bits(int isc)
101{
79fd50c6
CH		 102 return (0x80 >> isc) << 24;
103}
104
6d3da241 105static inline u8 int_word_to_isc(u32 int_word)
ba5c1e9b 106{
6d3da241
JF		 107 return (int_word & 0x38000000) >> 27;
108}
109
5f94c58e 110static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
6d3da241 111{
5f94c58e
DH		 112 return vcpu->kvm->arch.float_int.pending_irqs |
113 vcpu->arch.local_int.pending_irqs;
383d0b05
JF		 114}
115
6d3da241
JF		 116static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
117 unsigned long active_mask)
118{
119 int i;
120
121 for (i = 0; i <= MAX_ISC; i++)
122 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
123 active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i));
124
125 return active_mask;
126}
127
128static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
383d0b05 129{
6d3da241
JF		 130 unsigned long active_mask;
131
5f94c58e 132 active_mask = pending_irqs(vcpu);
ffeca0ae
JF		 133 if (!active_mask)
134 return 0;
383d0b05
JF		 135
136 if (psw_extint_disabled(vcpu))
137 active_mask &= ~IRQ_PEND_EXT_MASK;
6d3da241
JF		 138 if (psw_ioint_disabled(vcpu))
139 active_mask &= ~IRQ_PEND_IO_MASK;
140 else
141 active_mask = disable_iscs(vcpu, active_mask);
383d0b05
JF		 142 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
143 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
144 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
145 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
146 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
147 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
148 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
149 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
6d3da241
JF		 150 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
151 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
383d0b05
JF		 152 if (psw_mchk_disabled(vcpu))
153 active_mask &= ~IRQ_PEND_MCHK_MASK;
6d3da241
JF		 154 if (!(vcpu->arch.sie_block->gcr[14] &
155 vcpu->kvm->arch.float_int.mchk.cr14))
156 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
383d0b05 157
6cddd432
DH		 158 /*
159 * STOP irqs will never be actively delivered. They are triggered via
160 * intercept requests and cleared when the stop intercept is performed.
161 */
162 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
163
383d0b05
JF		 164 return active_mask;
165}
166
ba5c1e9b
CO		 167static void __set_cpu_idle(struct kvm_vcpu *vcpu)
168{
805de8f4 169 atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 170 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
171}
172
173static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
174{
805de8f4 175 atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 176 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
177}
178
179static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
180{
805de8f4
PZ		 181 atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
182 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 183 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 184 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
185
186 if (guestdbg_enabled(vcpu)) {
187 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
188 LCTL_CR10 | LCTL_CR11);
189 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
190 }
ba5c1e9b
CO		 191}
192
193static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
194{
805de8f4 195 atomic_or(flag, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 196}
197
6d3da241
JF		 198static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
199{
5f94c58e 200 if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK))
6d3da241
JF		 201 return;
202 else if (psw_ioint_disabled(vcpu))
203 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
204 else
205 vcpu->arch.sie_block->lctl |= LCTL_CR6;
206}
207
383d0b05
JF		 208static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
209{
5f94c58e 210 if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
383d0b05
JF		 211 return;
212 if (psw_extint_disabled(vcpu))
213 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
214 else
215 vcpu->arch.sie_block->lctl |= LCTL_CR0;
216}
217
218static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
219{
5f94c58e 220 if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
383d0b05
JF		 221 return;
222 if (psw_mchk_disabled(vcpu))
223 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
224 else
225 vcpu->arch.sie_block->lctl |= LCTL_CR14;
226}
227
6cddd432
DH		 228static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
229{
230 if (kvm_s390_is_stop_irq_pending(vcpu))
231 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
232}
233
6d3da241
JF		 234/* Set interception request for non-deliverable interrupts */
235static void set_intercept_indicators(struct kvm_vcpu *vcpu)
383d0b05 236{
6d3da241 237 set_intercept_indicators_io(vcpu);
383d0b05
JF		 238 set_intercept_indicators_ext(vcpu);
239 set_intercept_indicators_mchk(vcpu);
6cddd432 240 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 241}
242
8a2ef71b
JF		 243static u16 get_ilc(struct kvm_vcpu *vcpu)
244{
8a2ef71b
JF		 245 switch (vcpu->arch.sie_block->icptcode) {
246 case ICPT_INST:
247 case ICPT_INSTPROGI:
248 case ICPT_OPEREXC:
249 case ICPT_PARTEXEC:
250 case ICPT_IOINST:
251 /* last instruction only stored for these icptcodes */
33b412ac 252 return insn_length(vcpu->arch.sie_block->ipa >> 8);
8a2ef71b
JF		 253 case ICPT_PROGI:
254 return vcpu->arch.sie_block->pgmilc;
255 default:
256 return 0;
257 }
258}
259
0fb97abe
JF		 260static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
261{
383d0b05 262 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 263 int rc;
264
265 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
266 0, 0);
267
268 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
269 (u16 *)__LC_EXT_INT_CODE);
467fc298 270 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 271 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
272 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
273 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
274 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 275 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 276 return rc ? -EFAULT : 0;
0fb97abe
JF		 277}
278
279static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
280{
383d0b05 281 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 282 int rc;
283
284 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
285 0, 0);
286
287 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
288 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 289 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 290 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
291 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
292 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
293 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 294 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 295 return rc ? -EFAULT : 0;
0fb97abe
JF		 296}
297
383d0b05 298static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 299{
383d0b05
JF		 300 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
301 struct kvm_s390_ext_info ext;
0fb97abe
JF		 302 int rc;
303
383d0b05
JF		 304 spin_lock(&li->lock);
305 ext = li->irq.ext;
306 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
307 li->irq.ext.ext_params2 = 0;
308 spin_unlock(&li->lock);
309
3f24ba15
CB		 310 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
311 ext.ext_params2);
0fb97abe
JF		 312 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
313 KVM_S390_INT_PFAULT_INIT,
383d0b05 314 0, ext.ext_params2);
0fb97abe
JF		 315
316 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
317 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
318 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
319 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
320 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
321 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 322 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 323 return rc ? -EFAULT : 0;
0fb97abe
JF		 324}
325
383d0b05 326static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 327{
6d3da241 328 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
383d0b05 329 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
6d3da241 330 struct kvm_s390_mchk_info mchk = {};
bc17de7c 331 unsigned long adtl_status_addr;
6d3da241
JF		 332 int deliver = 0;
333 int rc = 0;
0fb97abe 334
6d3da241 335 spin_lock(&fi->lock);
383d0b05 336 spin_lock(&li->lock);
6d3da241
JF		 337 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
338 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
339 /*
340 * If there was an exigent machine check pending, then any
341 * repressible machine checks that might have been pending
342 * are indicated along with it, so always clear bits for
343 * repressible and exigent interrupts
344 */
345 mchk = li->irq.mchk;
346 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
347 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
348 memset(&li->irq.mchk, 0, sizeof(mchk));
349 deliver = 1;
350 }
383d0b05 351 /*
6d3da241
JF		 352 * We indicate floating repressible conditions along with
353 * other pending conditions. Channel Report Pending and Channel
354 * Subsystem damage are the only two and and are indicated by
355 * bits in mcic and masked in cr14.
383d0b05 356 */
6d3da241
JF		 357 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
358 mchk.mcic |= fi->mchk.mcic;
359 mchk.cr14 |= fi->mchk.cr14;
360 memset(&fi->mchk, 0, sizeof(mchk));
361 deliver = 1;
362 }
383d0b05 363 spin_unlock(&li->lock);
6d3da241 364 spin_unlock(&fi->lock);
383d0b05 365
6d3da241 366 if (deliver) {
3f24ba15 367 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
6d3da241
JF		 368 mchk.mcic);
369 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
370 KVM_S390_MCHK,
371 mchk.cr14, mchk.mcic);
372
373 rc = kvm_s390_vcpu_store_status(vcpu,
374 KVM_S390_STORE_STATUS_PREFIXED);
375 rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR,
376 &adtl_status_addr,
377 sizeof(unsigned long));
378 rc |= kvm_s390_vcpu_store_adtl_status(vcpu,
379 adtl_status_addr);
380 rc |= put_guest_lc(vcpu, mchk.mcic,
381 (u64 __user *) __LC_MCCK_CODE);
382 rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
383 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
384 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
385 &mchk.fixed_logout,
386 sizeof(mchk.fixed_logout));
387 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
388 &vcpu->arch.sie_block->gpsw,
389 sizeof(psw_t));
390 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
391 &vcpu->arch.sie_block->gpsw,
392 sizeof(psw_t));
393 }
99e20009 394 return rc ? -EFAULT : 0;
0fb97abe
JF		 395}
396
397static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
398{
383d0b05 399 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 400 int rc;
401
3f24ba15 402 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
0fb97abe
JF		 403 vcpu->stat.deliver_restart_signal++;
404 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
405
406 rc = write_guest_lc(vcpu,
407 offsetof(struct _lowcore, restart_old_psw),
408 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
409 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
410 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 411 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 412 return rc ? -EFAULT : 0;
0fb97abe
JF		 413}
414
383d0b05 415static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 416{
383d0b05
JF		 417 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
418 struct kvm_s390_prefix_info prefix;
419
420 spin_lock(&li->lock);
421 prefix = li->irq.prefix;
422 li->irq.prefix.address = 0;
423 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
424 spin_unlock(&li->lock);
0fb97abe 425
0fb97abe
JF		 426 vcpu->stat.deliver_prefix_signal++;
427 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
428 KVM_S390_SIGP_SET_PREFIX,
383d0b05 429 prefix.address, 0);
0fb97abe 430
383d0b05 431 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 432 return 0;
433}
434
383d0b05 435static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 436{
383d0b05 437 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 438 int rc;
383d0b05
JF		 439 int cpu_addr;
440
441 spin_lock(&li->lock);
442 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
443 clear_bit(cpu_addr, li->sigp_emerg_pending);
444 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
445 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
446 spin_unlock(&li->lock);
0fb97abe 447
3f24ba15 448 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
0fb97abe 449 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 450 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
451 cpu_addr, 0);
0fb97abe
JF		 452
453 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
454 (u16 *)__LC_EXT_INT_CODE);
383d0b05 455 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 456 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
457 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
458 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
459 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 460 return rc ? -EFAULT : 0;
0fb97abe
JF		 461}
462
383d0b05 463static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 464{
383d0b05
JF		 465 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
466 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 467 int rc;
468
383d0b05
JF		 469 spin_lock(&li->lock);
470 extcall = li->irq.extcall;
471 li->irq.extcall.code = 0;
472 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
473 spin_unlock(&li->lock);
474
3f24ba15 475 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
0fb97abe
JF		 476 vcpu->stat.deliver_external_call++;
477 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
478 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 479 extcall.code, 0);
0fb97abe
JF		 480
481 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
482 (u16 *)__LC_EXT_INT_CODE);
383d0b05 483 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 484 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
485 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
486 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
487 sizeof(psw_t));
99e20009 488 return rc ? -EFAULT : 0;
0fb97abe
JF		 489}
490
383d0b05 491static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 492{
383d0b05
JF		 493 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
494 struct kvm_s390_pgm_info pgm_info;
a9a846fd 495 int rc = 0, nullifying = false;
8a2ef71b 496 u16 ilc = get_ilc(vcpu);
8712836b 497
383d0b05
JF		 498 spin_lock(&li->lock);
499 pgm_info = li->irq.pgm;
500 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
501 memset(&li->irq.pgm, 0, sizeof(pgm_info));
502 spin_unlock(&li->lock);
503
3f24ba15 504 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilc:%d",
383d0b05 505 pgm_info.code, ilc);
0fb97abe
JF		 506 vcpu->stat.deliver_program_int++;
507 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 508 pgm_info.code, 0);
0fb97abe 509
383d0b05 510 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 511 case PGM_AFX_TRANSLATION:
512 case PGM_ASX_TRANSLATION:
513 case PGM_EX_TRANSLATION:
514 case PGM_LFX_TRANSLATION:
515 case PGM_LSTE_SEQUENCE:
516 case PGM_LSX_TRANSLATION:
517 case PGM_LX_TRANSLATION:
518 case PGM_PRIMARY_AUTHORITY:
519 case PGM_SECONDARY_AUTHORITY:
a9a846fd
TH		 520 nullifying = true;
521 /* fall through */
8712836b 522 case PGM_SPACE_SWITCH:
383d0b05 523 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 524 (u64 *)__LC_TRANS_EXC_CODE);
525 break;
526 case PGM_ALEN_TRANSLATION:
527 case PGM_ALE_SEQUENCE:
528 case PGM_ASTE_INSTANCE:
529 case PGM_ASTE_SEQUENCE:
530 case PGM_ASTE_VALIDITY:
531 case PGM_EXTENDED_AUTHORITY:
383d0b05 532 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 533 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 534 nullifying = true;
8712836b
DH		 535 break;
536 case PGM_ASCE_TYPE:
537 case PGM_PAGE_TRANSLATION:
538 case PGM_REGION_FIRST_TRANS:
539 case PGM_REGION_SECOND_TRANS:
540 case PGM_REGION_THIRD_TRANS:
541 case PGM_SEGMENT_TRANSLATION:
383d0b05 542 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 543 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 544 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 545 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 546 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 547 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 548 nullifying = true;
8712836b
DH		 549 break;
550 case PGM_MONITOR:
383d0b05 551 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 552 (u16 *)__LC_MON_CLASS_NR);
383d0b05 553 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 554 (u64 *)__LC_MON_CODE);
555 break;
403c8648 556 case PGM_VECTOR_PROCESSING:
8712836b 557 case PGM_DATA:
383d0b05 558 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 559 (u32 *)__LC_DATA_EXC_CODE);
560 break;
561 case PGM_PROTECTION:
383d0b05 562 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 563 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 564 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 565 (u8 *)__LC_EXC_ACCESS_ID);
566 break;
a9a846fd
TH		 567 case PGM_STACK_FULL:
568 case PGM_STACK_EMPTY:
569 case PGM_STACK_SPECIFICATION:
570 case PGM_STACK_TYPE:
571 case PGM_STACK_OPERATION:
572 case PGM_TRACE_TABEL:
573 case PGM_CRYPTO_OPERATION:
574 nullifying = true;
575 break;
8712836b
DH		 576 }
577
383d0b05
JF		 578 if (pgm_info.code & PGM_PER) {
579 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 580 (u8 *) __LC_PER_CODE);
383d0b05 581 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 582 (u8 *)__LC_PER_ATMID);
383d0b05 583 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 584 (u64 *) __LC_PER_ADDRESS);
383d0b05 585 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 586 (u8 *) __LC_PER_ACCESS_ID);
587 }
588
a9a846fd
TH		 589 if (nullifying && vcpu->arch.sie_block->icptcode == ICPT_INST)
590 kvm_s390_rewind_psw(vcpu, ilc);
591
8a2ef71b 592 rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
2ba45968
DH		 593 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
594 (u64 *) __LC_LAST_BREAK);
383d0b05 595 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 596 (u16 *)__LC_PGM_INT_CODE);
597 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
598 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
599 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
600 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 601 return rc ? -EFAULT : 0;
0fb97abe
JF		 602}
603
6d3da241 604static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
0fb97abe 605{
6d3da241
JF		 606 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
607 struct kvm_s390_ext_info ext;
608 int rc = 0;
609
610 spin_lock(&fi->lock);
611 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
612 spin_unlock(&fi->lock);
613 return 0;
614 }
615 ext = fi->srv_signal;
616 memset(&fi->srv_signal, 0, sizeof(ext));
617 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
618 spin_unlock(&fi->lock);
0fb97abe 619
3f24ba15 620 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
6d3da241 621 ext.ext_params);
0fb97abe 622 vcpu->stat.deliver_service_signal++;
6d3da241
JF		 623 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
624 ext.ext_params, 0);
0fb97abe
JF		 625
626 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 627 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 628 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
629 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
630 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
631 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
6d3da241 632 rc |= put_guest_lc(vcpu, ext.ext_params,
0fb97abe 633 (u32 *)__LC_EXT_PARAMS);
6d3da241 634
99e20009 635 return rc ? -EFAULT : 0;
0fb97abe
JF		 636}
637
6d3da241 638static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
0fb97abe 639{
6d3da241
JF		 640 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
641 struct kvm_s390_interrupt_info *inti;
642 int rc = 0;
0fb97abe 643
6d3da241
JF		 644 spin_lock(&fi->lock);
645 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
646 struct kvm_s390_interrupt_info,
647 list);
648 if (inti) {
6d3da241
JF		 649 list_del(&inti->list);
650 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
651 }
652 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
653 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
654 spin_unlock(&fi->lock);
8712836b 655
6d3da241 656 if (inti) {
3f24ba15
CB		 657 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
658 KVM_S390_INT_PFAULT_DONE, 0,
659 inti->ext.ext_params2);
660 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
661 inti->ext.ext_params2);
662
6d3da241
JF		 663 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
664 (u16 *)__LC_EXT_INT_CODE);
665 rc |= put_guest_lc(vcpu, PFAULT_DONE,
666 (u16 *)__LC_EXT_CPU_ADDR);
667 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
668 &vcpu->arch.sie_block->gpsw,
669 sizeof(psw_t));
670 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
671 &vcpu->arch.sie_block->gpsw,
672 sizeof(psw_t));
673 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
674 (u64 *)__LC_EXT_PARAMS2);
675 kfree(inti);
676 }
99e20009 677 return rc ? -EFAULT : 0;
0fb97abe
JF		 678}
679
6d3da241 680static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
0fb97abe 681{
6d3da241
JF		 682 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
683 struct kvm_s390_interrupt_info *inti;
684 int rc = 0;
0fb97abe 685
6d3da241
JF		 686 spin_lock(&fi->lock);
687 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
688 struct kvm_s390_interrupt_info,
689 list);
690 if (inti) {
691 VCPU_EVENT(vcpu, 4,
3f24ba15 692 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
6d3da241
JF		 693 inti->ext.ext_params, inti->ext.ext_params2);
694 vcpu->stat.deliver_virtio_interrupt++;
695 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
696 inti->type,
697 inti->ext.ext_params,
698 inti->ext.ext_params2);
699 list_del(&inti->list);
700 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
701 }
702 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
703 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
704 spin_unlock(&fi->lock);
0fb97abe 705
6d3da241
JF		 706 if (inti) {
707 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
708 (u16 *)__LC_EXT_INT_CODE);
709 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
710 (u16 *)__LC_EXT_CPU_ADDR);
711 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
712 &vcpu->arch.sie_block->gpsw,
713 sizeof(psw_t));
714 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
715 &vcpu->arch.sie_block->gpsw,
716 sizeof(psw_t));
717 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
718 (u32 *)__LC_EXT_PARAMS);
719 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
720 (u64 *)__LC_EXT_PARAMS2);
721 kfree(inti);
722 }
99e20009 723 return rc ? -EFAULT : 0;
0fb97abe
JF		 724}
725
726static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
6d3da241 727 unsigned long irq_type)
0fb97abe 728{
6d3da241
JF		 729 struct list_head *isc_list;
730 struct kvm_s390_float_interrupt *fi;
731 struct kvm_s390_interrupt_info *inti = NULL;
732 int rc = 0;
0fb97abe 733
6d3da241 734 fi = &vcpu->kvm->arch.float_int;
8712836b 735
6d3da241
JF		 736 spin_lock(&fi->lock);
737 isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0];
738 inti = list_first_entry_or_null(isc_list,
739 struct kvm_s390_interrupt_info,
740 list);
741 if (inti) {
3f24ba15 742 VCPU_EVENT(vcpu, 4, "deliver: I/O 0x%llx", inti->type);
6d3da241
JF		 743 vcpu->stat.deliver_io_int++;
744 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
745 inti->type,
746 ((__u32)inti->io.subchannel_id << 16) |
747 inti->io.subchannel_nr,
748 ((__u64)inti->io.io_int_parm << 32) |
749 inti->io.io_int_word);
750 list_del(&inti->list);
751 fi->counters[FIRQ_CNTR_IO] -= 1;
752 }
753 if (list_empty(isc_list))
754 clear_bit(irq_type, &fi->pending_irqs);
755 spin_unlock(&fi->lock);
756
757 if (inti) {
758 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
759 (u16 *)__LC_SUBCHANNEL_ID);
760 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
761 (u16 *)__LC_SUBCHANNEL_NR);
762 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
763 (u32 *)__LC_IO_INT_PARM);
764 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
765 (u32 *)__LC_IO_INT_WORD);
766 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
767 &vcpu->arch.sie_block->gpsw,
768 sizeof(psw_t));
769 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
770 &vcpu->arch.sie_block->gpsw,
771 sizeof(psw_t));
772 kfree(inti);
773 }
383d0b05 774
99e20009 775 return rc ? -EFAULT : 0;
383d0b05
JF		 776}
777
778typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
779
780static const deliver_irq_t deliver_irq_funcs[] = {
781 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
6d3da241 782 [IRQ_PEND_MCHK_REP] = __deliver_machine_check,
383d0b05
JF		 783 [IRQ_PEND_PROG] = __deliver_prog,
784 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
785 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
786 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
787 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
788 [IRQ_PEND_RESTART] = __deliver_restart,
383d0b05
JF		 789 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
790 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
6d3da241
JF		 791 [IRQ_PEND_EXT_SERVICE] = __deliver_service,
792 [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done,
793 [IRQ_PEND_VIRTIO] = __deliver_virtio,
383d0b05
JF		 794};
795
ea5f4969
DH		 796/* Check whether an external call is pending (deliverable or not) */
797int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 798{
ea5f4969
DH		 799 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
800 uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
4953919f 801
37c5f6c8 802 if (!sclp.has_sigpif)
ea5f4969 803 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 804
ea5f4969
DH		 805 return (sigp_ctrl & SIGP_CTRL_C) &&
806 (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND);
4953919f
DH		 807}
808
9a022067 809int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 810{
4d32ad6b
DH		 811 if (deliverable_irqs(vcpu))
812 return 1;
ba5c1e9b 813
4d32ad6b
DH		 814 if (kvm_cpu_has_pending_timer(vcpu))
815 return 1;
ba5c1e9b 816
ea5f4969 817 /* external call pending and deliverable */
4d32ad6b 818 if (kvm_s390_ext_call_pending(vcpu) &&
ea5f4969
DH		 819 !psw_extint_disabled(vcpu) &&
820 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
4d32ad6b 821 return 1;
4953919f 822
4d32ad6b
DH		 823 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
824 return 1;
825 return 0;
ba5c1e9b
CO		 826}
827
3d80840d
MT		 828int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
829{
b4aec925 830 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
3d80840d
MT		 831}
832
ba5c1e9b
CO		 833int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
834{
835 u64 now, sltime;
ba5c1e9b
CO		 836
837 vcpu->stat.exit_wait_state++;
ba5c1e9b 838
0759d068 839 /* fast path */
118b862b 840 if (kvm_arch_vcpu_runnable(vcpu))
0759d068 841 return 0;
e52b2af5 842
ba5c1e9b
CO		 843 if (psw_interrupts_disabled(vcpu)) {
844 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 845 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 846 }
847
bb78c5ec 848 if (!ckc_interrupts_enabled(vcpu)) {
ba5c1e9b 849 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 850 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 851 goto no_timer;
852 }
853
fdf03650 854 preempt_disable();
8c071b0f 855 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
fdf03650 856 preempt_enable();
ed4f2094 857 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
bda343ef
DH		 858
859 /* underflow */
860 if (vcpu->arch.sie_block->ckc < now)
861 return 0;
862
863 __set_cpu_idle(vcpu);
ca872302 864 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
3f24ba15 865 VCPU_EVENT(vcpu, 4, "enabled wait via clock comparator: %llu ns", sltime);
ba5c1e9b 866no_timer:
800c1065 867 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 868 kvm_vcpu_block(vcpu);
ba5c1e9b 869 __unset_cpu_idle(vcpu);
800c1065
TH		 870 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
871
2d00f759 872 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 873 return 0;
874}
875
0e9c85a5
DH		 876void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
877{
878 if (waitqueue_active(&vcpu->wq)) {
879 /*
880 * The vcpu gave up the cpu voluntarily, mark it as a good
881 * yield-candidate.
882 */
883 vcpu->preempted = true;
884 wake_up_interruptible(&vcpu->wq);
ce2e4f0b 885 vcpu->stat.halt_wakeup++;
0e9c85a5
DH		 886 }
887}
888
ca872302
CB		 889enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
890{
891 struct kvm_vcpu *vcpu;
2d00f759 892 u64 now, sltime;
ca872302
CB		 893
894 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
fdf03650 895 preempt_disable();
2d00f759 896 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
fdf03650 897 preempt_enable();
2d00f759 898 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
ca872302 899
2d00f759
DH		 900 /*
901 * If the monotonic clock runs faster than the tod clock we might be
902 * woken up too early and have to go back to sleep to avoid deadlocks.
903 */
904 if (vcpu->arch.sie_block->ckc > now &&
905 hrtimer_forward_now(timer, ns_to_ktime(sltime)))
906 return HRTIMER_RESTART;
907 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 908 return HRTIMER_NORESTART;
909}
ba5c1e9b 910
2ed10cc1
JF		 911void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
912{
913 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 914
4ae3c081 915 spin_lock(&li->lock);
383d0b05
JF		 916 li->pending_irqs = 0;
917 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
918 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 919 spin_unlock(&li->lock);
4953919f
DH		 920
921 /* clear pending external calls set by sigp interpretation facility */
805de8f4 922 atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags);
ea5f4969 923 vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0;
2ed10cc1
JF		 924}
925
614aeab4 926int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 927{
180c12fb 928 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 929 deliver_irq_t func;
79395031 930 int rc = 0;
383d0b05 931 unsigned long irq_type;
6d3da241 932 unsigned long irqs;
ba5c1e9b
CO		 933
934 __reset_intercept_indicators(vcpu);
ba5c1e9b 935
383d0b05
JF		 936 /* pending ckc conditions might have been invalidated */
937 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
b4aec925 938 if (ckc_irq_pending(vcpu))
383d0b05
JF		 939 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
940
b4aec925
DH		 941 /* pending cpu timer conditions might have been invalidated */
942 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
943 if (cpu_timer_irq_pending(vcpu))
944 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
945
ffeca0ae 946 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
383d0b05 947 /* bits are in the order of interrupt priority */
6d3da241 948 irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT);
6d3da241
JF		 949 if (is_ioirq(irq_type)) {
950 rc = __deliver_io(vcpu, irq_type);
951 } else {
952 func = deliver_irq_funcs[irq_type];
953 if (!func) {
954 WARN_ON_ONCE(func == NULL);
955 clear_bit(irq_type, &li->pending_irqs);
956 continue;
957 }
958 rc = func(vcpu);
383d0b05 959 }
ffeca0ae 960 }
383d0b05 961
6d3da241 962 set_intercept_indicators(vcpu);
79395031
JF		 963
964 return rc;
ba5c1e9b
CO		 965}
966
383d0b05 967static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 968{
969 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
970
ed2afcfa
DH		 971 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
972 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
973 irq->u.pgm.code, 0);
974
383d0b05 975 li->irq.pgm = irq->u.pgm;
9185124e 976 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 977 return 0;
978}
979
ba5c1e9b
CO		 980int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
981{
180c12fb 982 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 983 struct kvm_s390_irq irq;
ba5c1e9b 984
4ae3c081 985 spin_lock(&li->lock);
383d0b05
JF		 986 irq.u.pgm.code = code;
987 __inject_prog(vcpu, &irq);
d0321a24 988 BUG_ON(waitqueue_active(li->wq));
4ae3c081 989 spin_unlock(&li->lock);
bcd84683
JF		 990 return 0;
991}
992
993int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
994 struct kvm_s390_pgm_info *pgm_info)
995{
996 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 997 struct kvm_s390_irq irq;
0146a7b0 998 int rc;
bcd84683 999
4ae3c081 1000 spin_lock(&li->lock);
383d0b05
JF		 1001 irq.u.pgm = *pgm_info;
1002 rc = __inject_prog(vcpu, &irq);
bcd84683 1003 BUG_ON(waitqueue_active(li->wq));
4ae3c081 1004 spin_unlock(&li->lock);
0146a7b0
JF		 1005 return rc;
1006}
1007
383d0b05 1008static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1009{
1010 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1011
3f24ba15
CB		 1012 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1013 irq->u.ext.ext_params2);
383d0b05
JF		 1014 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1015 irq->u.ext.ext_params,
ed2afcfa 1016 irq->u.ext.ext_params2);
383d0b05
JF		 1017
1018 li->irq.ext = irq->u.ext;
1019 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
805de8f4 1020 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1021 return 0;
1022}
1023
ea5f4969
DH		 1024static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id)
1025{
1026 unsigned char new_val, old_val;
1027 uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
1028
1029 new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK);
1030 old_val = *sigp_ctrl & ~SIGP_CTRL_C;
1031 if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) {
1032 /* another external call is pending */
1033 return -EBUSY;
1034 }
805de8f4 1035 atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
ea5f4969
DH		 1036 return 0;
1037}
1038
0675d92d 1039static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1040{
1041 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1042 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1043 uint16_t src_id = irq->u.extcall.code;
0146a7b0 1044
3f24ba15 1045 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
ea5f4969 1046 src_id);
383d0b05 1047 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ed2afcfa 1048 src_id, 0);
ea5f4969
DH		 1049
1050 /* sending vcpu invalid */
1051 if (src_id >= KVM_MAX_VCPUS ||
1052 kvm_get_vcpu(vcpu->kvm, src_id) == NULL)
1053 return -EINVAL;
1054
37c5f6c8 1055 if (sclp.has_sigpif)
ea5f4969 1056 return __inject_extcall_sigpif(vcpu, src_id);
383d0b05 1057
b938eace 1058 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
ea5f4969 1059 return -EBUSY;
383d0b05 1060 *extcall = irq->u.extcall;
805de8f4 1061 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1062 return 0;
1063}
1064
383d0b05 1065static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1066{
1067 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1068 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0 1069
ed2afcfa 1070 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
556cc0da 1071 irq->u.prefix.address);
383d0b05 1072 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
ed2afcfa 1073 irq->u.prefix.address, 0);
383d0b05 1074
a3a9c59a
DH		 1075 if (!is_vcpu_stopped(vcpu))
1076 return -EBUSY;
1077
383d0b05
JF		 1078 *prefix = irq->u.prefix;
1079 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1080 return 0;
1081}
1082
6cddd432 1083#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1084static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1085{
1086 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1087 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1088 int rc = 0;
0146a7b0 1089
ed2afcfa 1090 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
383d0b05 1091
2822545f
DH		 1092 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1093 return -EINVAL;
1094
6cddd432
DH		 1095 if (is_vcpu_stopped(vcpu)) {
1096 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1097 rc = kvm_s390_store_status_unloaded(vcpu,
1098 KVM_S390_STORE_STATUS_NOADDR);
1099 return rc;
1100 }
1101
1102 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1103 return -EBUSY;
2822545f 1104 stop->flags = irq->u.stop.flags;
6cddd432 1105 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1106 return 0;
1107}
1108
1109static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1110 struct kvm_s390_irq *irq)
0146a7b0
JF		 1111{
1112 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1113
3f24ba15 1114 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
ed2afcfa 1115 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
383d0b05
JF		 1116
1117 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1118 return 0;
1119}
1120
1121static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1122 struct kvm_s390_irq *irq)
0146a7b0
JF		 1123{
1124 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1125
3f24ba15 1126 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
383d0b05
JF		 1127 irq->u.emerg.code);
1128 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
ed2afcfa 1129 irq->u.emerg.code, 0);
383d0b05 1130
49538d12 1131 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1132 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
805de8f4 1133 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1134 return 0;
1135}
1136
383d0b05 1137static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1138{
1139 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1140 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0 1141
3f24ba15 1142 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
556cc0da 1143 irq->u.mchk.mcic);
383d0b05 1144 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
ed2afcfa 1145 irq->u.mchk.mcic);
383d0b05
JF		 1146
1147 /*
fc2020cf
JF		 1148 * Because repressible machine checks can be indicated along with
1149 * exigent machine checks (PoP, Chapter 11, Interruption action)
1150 * we need to combine cr14, mcic and external damage code.
1151 * Failing storage address and the logout area should not be or'ed
1152 * together, we just indicate the last occurrence of the corresponding
1153 * machine check
383d0b05 1154 */
fc2020cf 1155 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1156 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1157 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1158 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1159 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1160 sizeof(mchk->fixed_logout));
383d0b05
JF		 1161 if (mchk->mcic & MCHK_EX_MASK)
1162 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1163 else if (mchk->mcic & MCHK_REP_MASK)
1164 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1165 return 0;
1166}
1167
383d0b05 1168static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1169{
1170 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1171
3f24ba15 1172 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
383d0b05 1173 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
ed2afcfa 1174 0, 0);
383d0b05
JF		 1175
1176 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
805de8f4 1177 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1178 return 0;
1179}
1180
383d0b05 1181static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1182{
1183 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1184
3f24ba15 1185 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
383d0b05 1186 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
ed2afcfa 1187 0, 0);
383d0b05
JF		 1188
1189 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
805de8f4 1190 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
ba5c1e9b
CO		 1191 return 0;
1192}
1193
6d3da241
JF		 1194static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1195 int isc, u32 schid)
1196{
1197 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1198 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1199 struct kvm_s390_interrupt_info *iter;
1200 u16 id = (schid & 0xffff0000U) >> 16;
1201 u16 nr = schid & 0x0000ffffU;
1202
1203 spin_lock(&fi->lock);
1204 list_for_each_entry(iter, isc_list, list) {
1205 if (schid && (id != iter->io.subchannel_id ||
1206 nr != iter->io.subchannel_nr))
1207 continue;
1208 /* found an appropriate entry */
1209 list_del_init(&iter->list);
1210 fi->counters[FIRQ_CNTR_IO] -= 1;
1211 if (list_empty(isc_list))
1212 clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
1213 spin_unlock(&fi->lock);
1214 return iter;
1215 }
1216 spin_unlock(&fi->lock);
1217 return NULL;
1218}
383d0b05 1219
6d3da241
JF		 1220/*
1221 * Dequeue and return an I/O interrupt matching any of the interruption
1222 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
1223 */
fa6b7fe9 1224struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241
JF		 1225 u64 isc_mask, u32 schid)
1226{
1227 struct kvm_s390_interrupt_info *inti = NULL;
1228 int isc;
1229
1230 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1231 if (isc_mask & isc_to_isc_bits(isc))
1232 inti = get_io_int(kvm, isc, schid);
1233 }
1234 return inti;
1235}
1236
1237#define SCCB_MASK 0xFFFFFFF8
1238#define SCCB_EVENT_PENDING 0x3
1239
1240static int __inject_service(struct kvm *kvm,
1241 struct kvm_s390_interrupt_info *inti)
1242{
1243 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1244
1245 spin_lock(&fi->lock);
1246 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1247 /*
1248 * Early versions of the QEMU s390 bios will inject several
1249 * service interrupts after another without handling a
1250 * condition code indicating busy.
1251 * We will silently ignore those superfluous sccb values.
1252 * A future version of QEMU will take care of serialization
1253 * of servc requests
1254 */
1255 if (fi->srv_signal.ext_params & SCCB_MASK)
1256 goto out;
1257 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1258 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1259out:
1260 spin_unlock(&fi->lock);
1261 kfree(inti);
1262 return 0;
1263}
1264
1265static int __inject_virtio(struct kvm *kvm,
1266 struct kvm_s390_interrupt_info *inti)
1267{
1268 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1269
1270 spin_lock(&fi->lock);
1271 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1272 spin_unlock(&fi->lock);
1273 return -EBUSY;
1274 }
1275 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1276 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1277 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1278 spin_unlock(&fi->lock);
1279 return 0;
1280}
1281
1282static int __inject_pfault_done(struct kvm *kvm,
1283 struct kvm_s390_interrupt_info *inti)
1284{
1285 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1286
1287 spin_lock(&fi->lock);
1288 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1289 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1290 spin_unlock(&fi->lock);
1291 return -EBUSY;
1292 }
1293 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1294 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1295 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1296 spin_unlock(&fi->lock);
1297 return 0;
1298}
1299
1300#define CR_PENDING_SUBCLASS 28
1301static int __inject_float_mchk(struct kvm *kvm,
1302 struct kvm_s390_interrupt_info *inti)
1303{
1304 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1305
1306 spin_lock(&fi->lock);
1307 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1308 fi->mchk.mcic |= inti->mchk.mcic;
1309 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1310 spin_unlock(&fi->lock);
1311 kfree(inti);
1312 return 0;
1313}
1314
1315static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
fa6b7fe9
CH		 1316{
1317 struct kvm_s390_float_interrupt *fi;
6d3da241
JF		 1318 struct list_head *list;
1319 int isc;
fa6b7fe9 1320
fa6b7fe9
CH		 1321 fi = &kvm->arch.float_int;
1322 spin_lock(&fi->lock);
6d3da241
JF		 1323 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1324 spin_unlock(&fi->lock);
1325 return -EBUSY;
a91b8ebe 1326 }
6d3da241
JF		 1327 fi->counters[FIRQ_CNTR_IO] += 1;
1328
1329 isc = int_word_to_isc(inti->io.io_int_word);
1330 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1331 list_add_tail(&inti->list, list);
1332 set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
fa6b7fe9 1333 spin_unlock(&fi->lock);
6d3da241 1334 return 0;
fa6b7fe9 1335}
ba5c1e9b 1336
96e0ed23
DH		 1337/*
1338 * Find a destination VCPU for a floating irq and kick it.
1339 */
1340static void __floating_irq_kick(struct kvm *kvm, u64 type)
ba5c1e9b 1341{
96e0ed23 1342 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
180c12fb 1343 struct kvm_s390_local_interrupt *li;
96e0ed23
DH		 1344 struct kvm_vcpu *dst_vcpu;
1345 int sigcpu, online_vcpus, nr_tries = 0;
1346
1347 online_vcpus = atomic_read(&kvm->online_vcpus);
1348 if (!online_vcpus)
1349 return;
1350
1351 /* find idle VCPUs first, then round robin */
1352 sigcpu = find_first_bit(fi->idle_mask, online_vcpus);
1353 if (sigcpu == online_vcpus) {
1354 do {
1355 sigcpu = fi->next_rr_cpu;
1356 fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus;
1357 /* avoid endless loops if all vcpus are stopped */
1358 if (nr_tries++ >= online_vcpus)
1359 return;
1360 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1361 }
1362 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1363
1364 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
1365 li = &dst_vcpu->arch.local_int;
1366 spin_lock(&li->lock);
1367 switch (type) {
1368 case KVM_S390_MCHK:
805de8f4 1369 atomic_or(CPUSTAT_STOP_INT, li->cpuflags);
96e0ed23
DH		 1370 break;
1371 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
805de8f4 1372 atomic_or(CPUSTAT_IO_INT, li->cpuflags);
96e0ed23
DH		 1373 break;
1374 default:
805de8f4 1375 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
96e0ed23
DH		 1376 break;
1377 }
1378 spin_unlock(&li->lock);
1379 kvm_s390_vcpu_wakeup(dst_vcpu);
1380}
1381
1382static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1383{
6d3da241
JF		 1384 u64 type = READ_ONCE(inti->type);
1385 int rc;
ba5c1e9b 1386
6d3da241
JF		 1387 switch (type) {
1388 case KVM_S390_MCHK:
1389 rc = __inject_float_mchk(kvm, inti);
1390 break;
1391 case KVM_S390_INT_VIRTIO:
1392 rc = __inject_virtio(kvm, inti);
1393 break;
1394 case KVM_S390_INT_SERVICE:
1395 rc = __inject_service(kvm, inti);
1396 break;
1397 case KVM_S390_INT_PFAULT_DONE:
1398 rc = __inject_pfault_done(kvm, inti);
1399 break;
1400 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1401 rc = __inject_io(kvm, inti);
1402 break;
1403 default:
a91b8ebe 1404 rc = -EINVAL;
c05c4186 1405 }
6d3da241
JF		 1406 if (rc)
1407 return rc;
1408
96e0ed23 1409 __floating_irq_kick(kvm, type);
6d3da241 1410 return 0;
c05c4186
JF		 1411}
1412
1413int kvm_s390_inject_vm(struct kvm *kvm,
1414 struct kvm_s390_interrupt *s390int)
1415{
1416 struct kvm_s390_interrupt_info *inti;
428d53be 1417 int rc;
c05c4186 1418
ba5c1e9b
CO		 1419 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1420 if (!inti)
1421 return -ENOMEM;
1422
c05c4186
JF		 1423 inti->type = s390int->type;
1424 switch (inti->type) {
ba5c1e9b 1425 case KVM_S390_INT_VIRTIO:
33e19115 1426 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1427 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1428 inti->ext.ext_params = s390int->parm;
1429 inti->ext.ext_params2 = s390int->parm64;
1430 break;
1431 case KVM_S390_INT_SERVICE:
3f24ba15 1432 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1433 inti->ext.ext_params = s390int->parm;
1434 break;
3c038e6b 1435 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 1436 inti->ext.ext_params2 = s390int->parm64;
1437 break;
48a3e950 1438 case KVM_S390_MCHK:
3f24ba15 1439 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
48a3e950 1440 s390int->parm64);
48a3e950
CH		 1441 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1442 inti->mchk.mcic = s390int->parm64;
1443 break;
d8346b7d 1444 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
a37281b6 1445 if (inti->type & KVM_S390_INT_IO_AI_MASK)
d8346b7d
CH		 1446 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
1447 else
1448 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
1449 s390int->type & IOINT_CSSID_MASK,
1450 s390int->type & IOINT_SSID_MASK,
1451 s390int->type & IOINT_SCHID_MASK);
d8346b7d
CH		 1452 inti->io.subchannel_id = s390int->parm >> 16;
1453 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1454 inti->io.io_int_parm = s390int->parm64 >> 32;
1455 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1456 break;
ba5c1e9b
CO		 1457 default:
1458 kfree(inti);
1459 return -EINVAL;
1460 }
ade38c31
CH		 1461 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1462 2);
ba5c1e9b 1463
428d53be
DH		 1464 rc = __inject_vm(kvm, inti);
1465 if (rc)
1466 kfree(inti);
1467 return rc;
ba5c1e9b
CO		 1468}
1469
15462e37 1470int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 1471 struct kvm_s390_interrupt_info *inti)
1472{
15462e37 1473 return __inject_vm(kvm, inti);
2f32d4ea
CH		 1474}
1475
383d0b05
JF		 1476int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1477 struct kvm_s390_irq *irq)
1478{
1479 irq->type = s390int->type;
1480 switch (irq->type) {
1481 case KVM_S390_PROGRAM_INT:
1482 if (s390int->parm & 0xffff0000)
1483 return -EINVAL;
1484 irq->u.pgm.code = s390int->parm;
1485 break;
1486 case KVM_S390_SIGP_SET_PREFIX:
1487 irq->u.prefix.address = s390int->parm;
1488 break;
2822545f
DH		 1489 case KVM_S390_SIGP_STOP:
1490 irq->u.stop.flags = s390int->parm;
1491 break;
383d0b05 1492 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 1493 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1494 return -EINVAL;
1495 irq->u.extcall.code = s390int->parm;
1496 break;
1497 case KVM_S390_INT_EMERGENCY:
94d1f564 1498 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1499 return -EINVAL;
1500 irq->u.emerg.code = s390int->parm;
1501 break;
1502 case KVM_S390_MCHK:
1503 irq->u.mchk.mcic = s390int->parm64;
1504 break;
1505 }
1506 return 0;
1507}
1508
6cddd432
DH		 1509int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1510{
1511 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1512
1513 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1514}
1515
1516void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1517{
1518 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1519
1520 spin_lock(&li->lock);
1521 li->irq.stop.flags = 0;
1522 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1523 spin_unlock(&li->lock);
1524}
1525
79e87a10 1526static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 1527{
0146a7b0 1528 int rc;
ba5c1e9b 1529
383d0b05 1530 switch (irq->type) {
ba5c1e9b 1531 case KVM_S390_PROGRAM_INT:
383d0b05 1532 rc = __inject_prog(vcpu, irq);
ba5c1e9b 1533 break;
b7e6e4d3 1534 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 1535 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 1536 break;
ba5c1e9b 1537 case KVM_S390_SIGP_STOP:
383d0b05 1538 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 1539 break;
ba5c1e9b 1540 case KVM_S390_RESTART:
383d0b05 1541 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 1542 break;
e029ae5b 1543 case KVM_S390_INT_CLOCK_COMP:
383d0b05 1544 rc = __inject_ckc(vcpu);
0146a7b0 1545 break;
e029ae5b 1546 case KVM_S390_INT_CPU_TIMER:
383d0b05 1547 rc = __inject_cpu_timer(vcpu);
82a12737 1548 break;
7697e71f 1549 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 1550 rc = __inject_extcall(vcpu, irq);
82a12737 1551 break;
ba5c1e9b 1552 case KVM_S390_INT_EMERGENCY:
383d0b05 1553 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 1554 break;
48a3e950 1555 case KVM_S390_MCHK:
383d0b05 1556 rc = __inject_mchk(vcpu, irq);
48a3e950 1557 break;
3c038e6b 1558 case KVM_S390_INT_PFAULT_INIT:
383d0b05 1559 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 1560 break;
ba5c1e9b
CO		 1561 case KVM_S390_INT_VIRTIO:
1562 case KVM_S390_INT_SERVICE:
d8346b7d 1563 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 1564 default:
0146a7b0 1565 rc = -EINVAL;
ba5c1e9b 1566 }
79e87a10
JF		 1567
1568 return rc;
1569}
1570
1571int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1572{
1573 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1574 int rc;
1575
1576 spin_lock(&li->lock);
1577 rc = do_inject_vcpu(vcpu, irq);
4ae3c081 1578 spin_unlock(&li->lock);
0146a7b0
JF		 1579 if (!rc)
1580 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 1581 return rc;
ba5c1e9b 1582}
c05c4186 1583
6d3da241 1584static inline void clear_irq_list(struct list_head *_list)
c05c4186 1585{
6d3da241 1586 struct kvm_s390_interrupt_info *inti, *n;
c05c4186 1587
6d3da241 1588 list_for_each_entry_safe(inti, n, _list, list) {
c05c4186
JF		 1589 list_del(&inti->list);
1590 kfree(inti);
1591 }
c05c4186
JF		 1592}
1593
94aa033e
JF		 1594static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
1595 struct kvm_s390_irq *irq)
c05c4186 1596{
94aa033e 1597 irq->type = inti->type;
c05c4186 1598 switch (inti->type) {
3c038e6b
DD		 1599 case KVM_S390_INT_PFAULT_INIT:
1600 case KVM_S390_INT_PFAULT_DONE:
c05c4186 1601 case KVM_S390_INT_VIRTIO:
94aa033e 1602 irq->u.ext = inti->ext;
c05c4186
JF		 1603 break;
1604 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 1605 irq->u.io = inti->io;
c05c4186 1606 break;
c05c4186 1607 }
c05c4186
JF		 1608}
1609
6d3da241
JF		 1610void kvm_s390_clear_float_irqs(struct kvm *kvm)
1611{
1612 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1613 int i;
1614
1615 spin_lock(&fi->lock);
f2ae45ed
JF		 1616 fi->pending_irqs = 0;
1617 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
1618 memset(&fi->mchk, 0, sizeof(fi->mchk));
6d3da241
JF		 1619 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1620 clear_irq_list(&fi->lists[i]);
1621 for (i = 0; i < FIRQ_MAX_COUNT; i++)
1622 fi->counters[i] = 0;
1623 spin_unlock(&fi->lock);
1624};
1625
94aa033e 1626static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186
JF		 1627{
1628 struct kvm_s390_interrupt_info *inti;
1629 struct kvm_s390_float_interrupt *fi;
94aa033e 1630 struct kvm_s390_irq *buf;
6d3da241 1631 struct kvm_s390_irq *irq;
94aa033e 1632 int max_irqs;
c05c4186
JF		 1633 int ret = 0;
1634 int n = 0;
6d3da241 1635 int i;
c05c4186 1636
94aa033e
JF		 1637 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
1638 return -EINVAL;
1639
1640 /*
1641 * We are already using -ENOMEM to signal
1642 * userspace it may retry with a bigger buffer,
1643 * so we need to use something else for this case
1644 */
1645 buf = vzalloc(len);
1646 if (!buf)
1647 return -ENOBUFS;
1648
1649 max_irqs = len / sizeof(struct kvm_s390_irq);
1650
c05c4186
JF		 1651 fi = &kvm->arch.float_int;
1652 spin_lock(&fi->lock);
6d3da241
JF		 1653 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
1654 list_for_each_entry(inti, &fi->lists[i], list) {
1655 if (n == max_irqs) {
1656 /* signal userspace to try again */
1657 ret = -ENOMEM;
1658 goto out;
1659 }
1660 inti_to_irq(inti, &buf[n]);
1661 n++;
1662 }
1663 }
1664 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
94aa033e 1665 if (n == max_irqs) {
c05c4186
JF		 1666 /* signal userspace to try again */
1667 ret = -ENOMEM;
6d3da241 1668 goto out;
c05c4186 1669 }
6d3da241
JF		 1670 irq = (struct kvm_s390_irq *) &buf[n];
1671 irq->type = KVM_S390_INT_SERVICE;
1672 irq->u.ext = fi->srv_signal;
c05c4186
JF		 1673 n++;
1674 }
6d3da241
JF		 1675 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
1676 if (n == max_irqs) {
1677 /* signal userspace to try again */
1678 ret = -ENOMEM;
1679 goto out;
1680 }
1681 irq = (struct kvm_s390_irq *) &buf[n];
1682 irq->type = KVM_S390_MCHK;
1683 irq->u.mchk = fi->mchk;
1684 n++;
1685}
1686
1687out:
c05c4186 1688 spin_unlock(&fi->lock);
94aa033e
JF		 1689 if (!ret && n > 0) {
1690 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
1691 ret = -EFAULT;
1692 }
1693 vfree(buf);
c05c4186
JF		 1694
1695 return ret < 0 ? ret : n;
1696}
1697
1698static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1699{
1700 int r;
1701
1702 switch (attr->group) {
1703 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 1704 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 1705 attr->attr);
1706 break;
1707 default:
1708 r = -EINVAL;
1709 }
1710
1711 return r;
1712}
1713
1714static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1715 u64 addr)
1716{
1717 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1718 void *target = NULL;
1719 void __user *source;
1720 u64 size;
1721
1722 if (get_user(inti->type, (u64 __user *)addr))
1723 return -EFAULT;
1724
1725 switch (inti->type) {
3c038e6b
DD		 1726 case KVM_S390_INT_PFAULT_INIT:
1727 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1728 case KVM_S390_INT_VIRTIO:
1729 case KVM_S390_INT_SERVICE:
1730 target = (void *) &inti->ext;
1731 source = &uptr->u.ext;
1732 size = sizeof(inti->ext);
1733 break;
1734 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1735 target = (void *) &inti->io;
1736 source = &uptr->u.io;
1737 size = sizeof(inti->io);
1738 break;
1739 case KVM_S390_MCHK:
1740 target = (void *) &inti->mchk;
1741 source = &uptr->u.mchk;
1742 size = sizeof(inti->mchk);
1743 break;
1744 default:
1745 return -EINVAL;
1746 }
1747
1748 if (copy_from_user(target, source, size))
1749 return -EFAULT;
1750
1751 return 0;
1752}
1753
1754static int enqueue_floating_irq(struct kvm_device *dev,
1755 struct kvm_device_attr *attr)
1756{
1757 struct kvm_s390_interrupt_info *inti = NULL;
1758 int r = 0;
1759 int len = attr->attr;
1760
1761 if (len % sizeof(struct kvm_s390_irq) != 0)
1762 return -EINVAL;
1763 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1764 return -EINVAL;
1765
1766 while (len >= sizeof(struct kvm_s390_irq)) {
1767 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1768 if (!inti)
1769 return -ENOMEM;
1770
1771 r = copy_irq_from_user(inti, attr->addr);
1772 if (r) {
1773 kfree(inti);
1774 return r;
1775 }
a91b8ebe
JF		 1776 r = __inject_vm(dev->kvm, inti);
1777 if (r) {
1778 kfree(inti);
1779 return r;
1780 }
c05c4186
JF		 1781 len -= sizeof(struct kvm_s390_irq);
1782 attr->addr += sizeof(struct kvm_s390_irq);
1783 }
1784
1785 return r;
1786}
1787
841b91c5
CH		 1788static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1789{
1790 if (id >= MAX_S390_IO_ADAPTERS)
1791 return NULL;
1792 return kvm->arch.adapters[id];
1793}
1794
1795static int register_io_adapter(struct kvm_device *dev,
1796 struct kvm_device_attr *attr)
1797{
1798 struct s390_io_adapter *adapter;
1799 struct kvm_s390_io_adapter adapter_info;
1800
1801 if (copy_from_user(&adapter_info,
1802 (void __user *)attr->addr, sizeof(adapter_info)))
1803 return -EFAULT;
1804
1805 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1806 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1807 return -EINVAL;
1808
1809 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1810 if (!adapter)
1811 return -ENOMEM;
1812
1813 INIT_LIST_HEAD(&adapter->maps);
1814 init_rwsem(&adapter->maps_lock);
1815 atomic_set(&adapter->nr_maps, 0);
1816 adapter->id = adapter_info.id;
1817 adapter->isc = adapter_info.isc;
1818 adapter->maskable = adapter_info.maskable;
1819 adapter->masked = false;
1820 adapter->swap = adapter_info.swap;
1821 dev->kvm->arch.adapters[adapter->id] = adapter;
1822
1823 return 0;
1824}
1825
1826int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1827{
1828 int ret;
1829 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1830
1831 if (!adapter || !adapter->maskable)
1832 return -EINVAL;
1833 ret = adapter->masked;
1834 adapter->masked = masked;
1835 return ret;
1836}
1837
1838static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1839{
1840 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1841 struct s390_map_info *map;
1842 int ret;
1843
1844 if (!adapter || !addr)
1845 return -EINVAL;
1846
1847 map = kzalloc(sizeof(*map), GFP_KERNEL);
1848 if (!map) {
1849 ret = -ENOMEM;
1850 goto out;
1851 }
1852 INIT_LIST_HEAD(&map->list);
1853 map->guest_addr = addr;
6e0a0431 1854 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 1855 if (map->addr == -EFAULT) {
1856 ret = -EFAULT;
1857 goto out;
1858 }
1859 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1860 if (ret < 0)
1861 goto out;
1862 BUG_ON(ret != 1);
1863 down_write(&adapter->maps_lock);
1864 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1865 list_add_tail(&map->list, &adapter->maps);
1866 ret = 0;
1867 } else {
1868 put_page(map->page);
1869 ret = -EINVAL;
1870 }
1871 up_write(&adapter->maps_lock);
1872out:
1873 if (ret)
1874 kfree(map);
1875 return ret;
1876}
1877
1878static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1879{
1880 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1881 struct s390_map_info *map, *tmp;
1882 int found = 0;
1883
1884 if (!adapter || !addr)
1885 return -EINVAL;
1886
1887 down_write(&adapter->maps_lock);
1888 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1889 if (map->guest_addr == addr) {
1890 found = 1;
1891 atomic_dec(&adapter->nr_maps);
1892 list_del(&map->list);
1893 put_page(map->page);
1894 kfree(map);
1895 break;
1896 }
1897 }
1898 up_write(&adapter->maps_lock);
1899
1900 return found ? 0 : -EINVAL;
1901}
1902
1903void kvm_s390_destroy_adapters(struct kvm *kvm)
1904{
1905 int i;
1906 struct s390_map_info *map, *tmp;
1907
1908 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1909 if (!kvm->arch.adapters[i])
1910 continue;
1911 list_for_each_entry_safe(map, tmp,
1912 &kvm->arch.adapters[i]->maps, list) {
1913 list_del(&map->list);
1914 put_page(map->page);
1915 kfree(map);
1916 }
1917 kfree(kvm->arch.adapters[i]);
1918 }
1919}
1920
1921static int modify_io_adapter(struct kvm_device *dev,
1922 struct kvm_device_attr *attr)
1923{
1924 struct kvm_s390_io_adapter_req req;
1925 struct s390_io_adapter *adapter;
1926 int ret;
1927
1928 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1929 return -EFAULT;
1930
1931 adapter = get_io_adapter(dev->kvm, req.id);
1932 if (!adapter)
1933 return -EINVAL;
1934 switch (req.type) {
1935 case KVM_S390_IO_ADAPTER_MASK:
1936 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1937 if (ret > 0)
1938 ret = 0;
1939 break;
1940 case KVM_S390_IO_ADAPTER_MAP:
1941 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1942 break;
1943 case KVM_S390_IO_ADAPTER_UNMAP:
1944 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1945 break;
1946 default:
1947 ret = -EINVAL;
1948 }
1949
1950 return ret;
1951}
1952
c05c4186
JF		 1953static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1954{
1955 int r = 0;
3c038e6b
DD		 1956 unsigned int i;
1957 struct kvm_vcpu *vcpu;
c05c4186
JF		 1958
1959 switch (attr->group) {
1960 case KVM_DEV_FLIC_ENQUEUE:
1961 r = enqueue_floating_irq(dev, attr);
1962 break;
1963 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 1964 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 1965 break;
3c038e6b
DD		 1966 case KVM_DEV_FLIC_APF_ENABLE:
1967 dev->kvm->arch.gmap->pfault_enabled = 1;
1968 break;
1969 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1970 dev->kvm->arch.gmap->pfault_enabled = 0;
1971 /*
1972 * Make sure no async faults are in transition when
1973 * clearing the queues. So we don't need to worry
1974 * about late coming workers.
1975 */
1976 synchronize_srcu(&dev->kvm->srcu);
1977 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1978 kvm_clear_async_pf_completion_queue(vcpu);
1979 break;
841b91c5
CH		 1980 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1981 r = register_io_adapter(dev, attr);
1982 break;
1983 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1984 r = modify_io_adapter(dev, attr);
1985 break;
c05c4186
JF		 1986 default:
1987 r = -EINVAL;
1988 }
1989
1990 return r;
1991}
1992
1993static int flic_create(struct kvm_device *dev, u32 type)
1994{
1995 if (!dev)
1996 return -EINVAL;
1997 if (dev->kvm->arch.flic)
1998 return -EINVAL;
1999 dev->kvm->arch.flic = dev;
2000 return 0;
2001}
2002
2003static void flic_destroy(struct kvm_device *dev)
2004{
2005 dev->kvm->arch.flic = NULL;
2006 kfree(dev);
2007}
2008
2009/* s390 floating irq controller (flic) */
2010struct kvm_device_ops kvm_flic_ops = {
2011 .name = "kvm-flic",
2012 .get_attr = flic_get_attr,
2013 .set_attr = flic_set_attr,
2014 .create = flic_create,
2015 .destroy = flic_destroy,
2016};
84223598
CH		 2017
2018static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2019{
2020 unsigned long bit;
2021
2022 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2023
2024 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2025}
2026
2027static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2028 u64 addr)
2029{
2030 struct s390_map_info *map;
2031
2032 if (!adapter)
2033 return NULL;
2034
2035 list_for_each_entry(map, &adapter->maps, list) {
2036 if (map->guest_addr == addr)
2037 return map;
2038 }
2039 return NULL;
2040}
2041
2042static int adapter_indicators_set(struct kvm *kvm,
2043 struct s390_io_adapter *adapter,
2044 struct kvm_s390_adapter_int *adapter_int)
2045{
2046 unsigned long bit;
2047 int summary_set, idx;
2048 struct s390_map_info *info;
2049 void *map;
2050
2051 info = get_map_info(adapter, adapter_int->ind_addr);
2052 if (!info)
2053 return -1;
2054 map = page_address(info->page);
2055 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2056 set_bit(bit, map);
2057 idx = srcu_read_lock(&kvm->srcu);
2058 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2059 set_page_dirty_lock(info->page);
2060 info = get_map_info(adapter, adapter_int->summary_addr);
2061 if (!info) {
2062 srcu_read_unlock(&kvm->srcu, idx);
2063 return -1;
2064 }
2065 map = page_address(info->page);
2066 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2067 adapter->swap);
2068 summary_set = test_and_set_bit(bit, map);
2069 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2070 set_page_dirty_lock(info->page);
2071 srcu_read_unlock(&kvm->srcu, idx);
2072 return summary_set ? 0 : 1;
2073}
2074
2075/*
2076 * < 0 - not injected due to error
2077 * = 0 - coalesced, summary indicator already active
2078 * > 0 - injected interrupt
2079 */
2080static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2081 struct kvm *kvm, int irq_source_id, int level,
2082 bool line_status)
2083{
2084 int ret;
2085 struct s390_io_adapter *adapter;
2086
2087 /* We're only interested in the 0->1 transition. */
2088 if (!level)
2089 return 0;
2090 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2091 if (!adapter)
2092 return -1;
2093 down_read(&adapter->maps_lock);
2094 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2095 up_read(&adapter->maps_lock);
2096 if ((ret > 0) && !adapter->masked) {
2097 struct kvm_s390_interrupt s390int = {
2098 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2099 .parm = 0,
2100 .parm64 = (adapter->isc << 27) | 0x80000000,
2101 };
2102 ret = kvm_s390_inject_vm(kvm, &s390int);
2103 if (ret == 0)
2104 ret = 1;
2105 }
2106 return ret;
2107}
2108
8ba918d4 2109int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 2110 const struct kvm_irq_routing_entry *ue)
2111{
2112 int ret;
2113
2114 switch (ue->type) {
2115 case KVM_IRQ_ROUTING_S390_ADAPTER:
2116 e->set = set_adapter_int;
2117 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2118 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2119 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2120 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2121 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2122 ret = 0;
2123 break;
2124 default:
2125 ret = -EINVAL;
2126 }
2127
2128 return ret;
2129}
2130
2131int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2132 int irq_source_id, int level, bool line_status)
2133{
2134 return -EINVAL;
2135}
816c7667
JF		 2136
2137int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2138{
2139 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2140 struct kvm_s390_irq *buf;
2141 int r = 0;
2142 int n;
2143
2144 buf = vmalloc(len);
2145 if (!buf)
2146 return -ENOMEM;
2147
2148 if (copy_from_user((void *) buf, irqstate, len)) {
2149 r = -EFAULT;
2150 goto out_free;
2151 }
2152
2153 /*
2154 * Don't allow setting the interrupt state
2155 * when there are already interrupts pending
2156 */
2157 spin_lock(&li->lock);
2158 if (li->pending_irqs) {
2159 r = -EBUSY;
2160 goto out_unlock;
2161 }
2162
2163 for (n = 0; n < len / sizeof(*buf); n++) {
2164 r = do_inject_vcpu(vcpu, &buf[n]);
2165 if (r)
2166 break;
2167 }
2168
2169out_unlock:
2170 spin_unlock(&li->lock);
2171out_free:
2172 vfree(buf);
2173
2174 return r;
2175}
2176
2177static void store_local_irq(struct kvm_s390_local_interrupt *li,
2178 struct kvm_s390_irq *irq,
2179 unsigned long irq_type)
2180{
2181 switch (irq_type) {
2182 case IRQ_PEND_MCHK_EX:
2183 case IRQ_PEND_MCHK_REP:
2184 irq->type = KVM_S390_MCHK;
2185 irq->u.mchk = li->irq.mchk;
2186 break;
2187 case IRQ_PEND_PROG:
2188 irq->type = KVM_S390_PROGRAM_INT;
2189 irq->u.pgm = li->irq.pgm;
2190 break;
2191 case IRQ_PEND_PFAULT_INIT:
2192 irq->type = KVM_S390_INT_PFAULT_INIT;
2193 irq->u.ext = li->irq.ext;
2194 break;
2195 case IRQ_PEND_EXT_EXTERNAL:
2196 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2197 irq->u.extcall = li->irq.extcall;
2198 break;
2199 case IRQ_PEND_EXT_CLOCK_COMP:
2200 irq->type = KVM_S390_INT_CLOCK_COMP;
2201 break;
2202 case IRQ_PEND_EXT_CPU_TIMER:
2203 irq->type = KVM_S390_INT_CPU_TIMER;
2204 break;
2205 case IRQ_PEND_SIGP_STOP:
2206 irq->type = KVM_S390_SIGP_STOP;
2207 irq->u.stop = li->irq.stop;
2208 break;
2209 case IRQ_PEND_RESTART:
2210 irq->type = KVM_S390_RESTART;
2211 break;
2212 case IRQ_PEND_SET_PREFIX:
2213 irq->type = KVM_S390_SIGP_SET_PREFIX;
2214 irq->u.prefix = li->irq.prefix;
2215 break;
2216 }
2217}
2218
2219int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2220{
2221 uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
2222 unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
2223 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2224 unsigned long pending_irqs;
2225 struct kvm_s390_irq irq;
2226 unsigned long irq_type;
2227 int cpuaddr;
2228 int n = 0;
2229
2230 spin_lock(&li->lock);
2231 pending_irqs = li->pending_irqs;
2232 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2233 sizeof(sigp_emerg_pending));
2234 spin_unlock(&li->lock);
2235
2236 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2237 memset(&irq, 0, sizeof(irq));
2238 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2239 continue;
2240 if (n + sizeof(irq) > len)
2241 return -ENOBUFS;
2242 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2243 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2244 return -EFAULT;
2245 n += sizeof(irq);
2246 }
2247
2248 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2249 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2250 memset(&irq, 0, sizeof(irq));
2251 if (n + sizeof(irq) > len)
2252 return -ENOBUFS;
2253 irq.type = KVM_S390_INT_EMERGENCY;
2254 irq.u.emerg.code = cpuaddr;
2255 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2256 return -EFAULT;
2257 n += sizeof(irq);
2258 }
2259 }
2260
2261 if ((sigp_ctrl & SIGP_CTRL_C) &&
2262 (atomic_read(&vcpu->arch.sie_block->cpuflags) &
2263 CPUSTAT_ECALL_PEND)) {
2264 if (n + sizeof(irq) > len)
2265 return -ENOBUFS;
2266 memset(&irq, 0, sizeof(irq));
2267 irq.type = KVM_S390_INT_EXTERNAL_CALL;
2268 irq.u.extcall.code = sigp_ctrl & SIGP_CTRL_SCN_MASK;
2269 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2270 return -EFAULT;
2271 n += sizeof(irq);
2272 }
2273
2274 return n;
2275}
Linux kernel - Deliverables
This page took 0.611711 seconds and 5 git commands to generate.