]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - arch/s390/kvm/interrupt.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
KVM: s390: only one external call may be pending at a time
[mirror_ubuntu-bionic-kernel.git] / arch / s390 / kvm / interrupt.c
CommitLineData
ba5c1e9b 1/*
a53c8fab 2 * handling kvm guest interrupts
ba5c1e9b 3 *
841b91c5 4 * Copyright IBM Corp. 2008,2014
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>
cbb870c8
HC		 20#include <asm/asm-offsets.h>
21#include <asm/uaccess.h>
ea5f4969 22#include <asm/sclp.h>
ba5c1e9b
CO		 23#include "kvm-s390.h"
24#include "gaccess.h"
ade38c31 25#include "trace-s390.h"
ba5c1e9b 26
d8346b7d
CH		 27#define IOINT_SCHID_MASK 0x0000ffff
28#define IOINT_SSID_MASK 0x00030000
29#define IOINT_CSSID_MASK 0x03fc0000
30#define IOINT_AI_MASK 0x04000000
44c6ca3d 31#define PFAULT_INIT 0x0600
60f90a14
JF		 32#define PFAULT_DONE 0x0680
33#define VIRTIO_PARAM 0x0d00
d8346b7d
CH		 34
35static int is_ioint(u64 type)
36{
37 return ((type & 0xfffe0000u) != 0xfffe0000u);
38}
39
3c038e6b 40int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 41{
42 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
43}
44
d8346b7d
CH		 45static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
46{
47 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
48}
49
48a3e950
CH		 50static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
51{
52 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
53}
54
ba5c1e9b
CO		 55static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
56{
57 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
58 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
59 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
60 return 0;
61 return 1;
62}
63
bb78c5ec
DH		 64static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
65{
66 if (psw_extint_disabled(vcpu) ||
67 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
68 return 0;
f71d0dc5
DH		 69 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
70 /* No timer interrupts when single stepping */
71 return 0;
bb78c5ec
DH		 72 return 1;
73}
74
79fd50c6
CH		 75static u64 int_word_to_isc_bits(u32 int_word)
76{
77 u8 isc = (int_word & 0x38000000) >> 27;
78
79 return (0x80 >> isc) << 24;
80}
81
614aeab4 82static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
180c12fb 83 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 84{
85 switch (inti->type) {
7697e71f
CE		 86 case KVM_S390_INT_EXTERNAL_CALL:
87 if (psw_extint_disabled(vcpu))
88 return 0;
89 if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
90 return 1;
f346026e 91 return 0;
ba5c1e9b
CO		 92 case KVM_S390_INT_EMERGENCY:
93 if (psw_extint_disabled(vcpu))
94 return 0;
95 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
96 return 1;
97 return 0;
e029ae5b
TH		 98 case KVM_S390_INT_CLOCK_COMP:
99 return ckc_interrupts_enabled(vcpu);
100 case KVM_S390_INT_CPU_TIMER:
101 if (psw_extint_disabled(vcpu))
102 return 0;
103 if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
104 return 1;
105 return 0;
ba5c1e9b 106 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 107 case KVM_S390_INT_PFAULT_INIT:
108 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 109 case KVM_S390_INT_VIRTIO:
110 if (psw_extint_disabled(vcpu))
111 return 0;
112 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
113 return 1;
114 return 0;
115 case KVM_S390_PROGRAM_INT:
116 case KVM_S390_SIGP_STOP:
117 case KVM_S390_SIGP_SET_PREFIX:
118 case KVM_S390_RESTART:
119 return 1;
48a3e950
CH		 120 case KVM_S390_MCHK:
121 if (psw_mchk_disabled(vcpu))
122 return 0;
123 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
124 return 1;
125 return 0;
d8346b7d
CH		 126 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
127 if (psw_ioint_disabled(vcpu))
128 return 0;
79fd50c6
CH		 129 if (vcpu->arch.sie_block->gcr[6] &
130 int_word_to_isc_bits(inti->io.io_int_word))
d8346b7d
CH		 131 return 1;
132 return 0;
ba5c1e9b 133 default:
d8346b7d
CH		 134 printk(KERN_WARNING "illegal interrupt type %llx\n",
135 inti->type);
ba5c1e9b
CO		 136 BUG();
137 }
138 return 0;
139}
140
383d0b05
JF		 141static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu)
142{
143 return vcpu->arch.local_int.pending_irqs;
144}
145
146static unsigned long deliverable_local_irqs(struct kvm_vcpu *vcpu)
147{
148 unsigned long active_mask = pending_local_irqs(vcpu);
149
150 if (psw_extint_disabled(vcpu))
151 active_mask &= ~IRQ_PEND_EXT_MASK;
152 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
153 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
154 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
155 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
156 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
157 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
158 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
159 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
160 if (psw_mchk_disabled(vcpu))
161 active_mask &= ~IRQ_PEND_MCHK_MASK;
162
6cddd432
DH		 163 /*
164 * STOP irqs will never be actively delivered. They are triggered via
165 * intercept requests and cleared when the stop intercept is performed.
166 */
167 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
168
383d0b05
JF		 169 return active_mask;
170}
171
ba5c1e9b
CO		 172static void __set_cpu_idle(struct kvm_vcpu *vcpu)
173{
ba5c1e9b
CO		 174 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
175 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
176}
177
178static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
179{
ba5c1e9b
CO		 180 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
181 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
182}
183
184static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
185{
4953919f
DH		 186 atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
187 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 188 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 189 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
190
191 if (guestdbg_enabled(vcpu)) {
192 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
193 LCTL_CR10 | LCTL_CR11);
194 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
195 }
ba5c1e9b
CO		 196}
197
198static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
199{
200 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
201}
202
383d0b05
JF		 203static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
204{
205 if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK))
206 return;
207 if (psw_extint_disabled(vcpu))
208 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
209 else
210 vcpu->arch.sie_block->lctl |= LCTL_CR0;
211}
212
213static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
214{
215 if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
216 return;
217 if (psw_mchk_disabled(vcpu))
218 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
219 else
220 vcpu->arch.sie_block->lctl |= LCTL_CR14;
221}
222
6cddd432
DH		 223static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
224{
225 if (kvm_s390_is_stop_irq_pending(vcpu))
226 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
227}
228
383d0b05
JF		 229/* Set interception request for non-deliverable local interrupts */
230static void set_intercept_indicators_local(struct kvm_vcpu *vcpu)
231{
232 set_intercept_indicators_ext(vcpu);
233 set_intercept_indicators_mchk(vcpu);
6cddd432 234 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 235}
236
ba5c1e9b 237static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
180c12fb 238 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 239{
240 switch (inti->type) {
ba5c1e9b 241 case KVM_S390_INT_SERVICE:
3c038e6b 242 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 243 case KVM_S390_INT_VIRTIO:
244 if (psw_extint_disabled(vcpu))
245 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
246 else
247 vcpu->arch.sie_block->lctl |= LCTL_CR0;
248 break;
48a3e950
CH		 249 case KVM_S390_MCHK:
250 if (psw_mchk_disabled(vcpu))
251 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
252 else
253 vcpu->arch.sie_block->lctl |= LCTL_CR14;
254 break;
d8346b7d
CH		 255 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
256 if (psw_ioint_disabled(vcpu))
257 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
258 else
259 vcpu->arch.sie_block->lctl |= LCTL_CR6;
260 break;
ba5c1e9b
CO		 261 default:
262 BUG();
263 }
264}
265
8a2ef71b
JF		 266static u16 get_ilc(struct kvm_vcpu *vcpu)
267{
268 const unsigned short table[] = { 2, 4, 4, 6 };
269
270 switch (vcpu->arch.sie_block->icptcode) {
271 case ICPT_INST:
272 case ICPT_INSTPROGI:
273 case ICPT_OPEREXC:
274 case ICPT_PARTEXEC:
275 case ICPT_IOINST:
276 /* last instruction only stored for these icptcodes */
277 return table[vcpu->arch.sie_block->ipa >> 14];
278 case ICPT_PROGI:
279 return vcpu->arch.sie_block->pgmilc;
280 default:
281 return 0;
282 }
283}
284
0fb97abe
JF		 285static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
286{
383d0b05 287 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 288 int rc;
289
290 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
291 0, 0);
292
293 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
294 (u16 *)__LC_EXT_INT_CODE);
467fc298 295 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 296 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
297 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
298 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
299 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 300 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 301 return rc ? -EFAULT : 0;
0fb97abe
JF		 302}
303
304static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
305{
383d0b05 306 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 307 int rc;
308
309 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
310 0, 0);
311
312 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
313 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 314 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 315 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
316 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
317 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
318 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 319 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 320 return rc ? -EFAULT : 0;
0fb97abe
JF		 321}
322
383d0b05 323static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 324{
383d0b05
JF		 325 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
326 struct kvm_s390_ext_info ext;
0fb97abe
JF		 327 int rc;
328
383d0b05
JF		 329 spin_lock(&li->lock);
330 ext = li->irq.ext;
331 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
332 li->irq.ext.ext_params2 = 0;
333 spin_unlock(&li->lock);
334
0fb97abe 335 VCPU_EVENT(vcpu, 4, "interrupt: pfault init parm:%x,parm64:%llx",
383d0b05 336 0, ext.ext_params2);
0fb97abe
JF		 337 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
338 KVM_S390_INT_PFAULT_INIT,
383d0b05 339 0, ext.ext_params2);
0fb97abe
JF		 340
341 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
342 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
343 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
344 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
345 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
346 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 347 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 348 return rc ? -EFAULT : 0;
0fb97abe
JF		 349}
350
383d0b05 351static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 352{
383d0b05
JF		 353 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
354 struct kvm_s390_mchk_info mchk;
0fb97abe
JF		 355 int rc;
356
383d0b05
JF		 357 spin_lock(&li->lock);
358 mchk = li->irq.mchk;
359 /*
360 * If there was an exigent machine check pending, then any repressible
361 * machine checks that might have been pending are indicated along
362 * with it, so always clear both bits
363 */
364 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
365 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
366 memset(&li->irq.mchk, 0, sizeof(mchk));
367 spin_unlock(&li->lock);
368
0fb97abe 369 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
383d0b05 370 mchk.mcic);
0fb97abe 371 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
383d0b05 372 mchk.cr14, mchk.mcic);
0fb97abe
JF		 373
374 rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
383d0b05 375 rc |= put_guest_lc(vcpu, mchk.mcic,
0fb97abe 376 (u64 __user *) __LC_MCCK_CODE);
383d0b05 377 rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
0fb97abe
JF		 378 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
379 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
383d0b05 380 &mchk.fixed_logout, sizeof(mchk.fixed_logout));
0fb97abe
JF		 381 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
382 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
384 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 385 return rc ? -EFAULT : 0;
0fb97abe
JF		 386}
387
388static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
389{
383d0b05 390 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 391 int rc;
392
393 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
394 vcpu->stat.deliver_restart_signal++;
395 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
396
397 rc = write_guest_lc(vcpu,
398 offsetof(struct _lowcore, restart_old_psw),
399 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
400 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
401 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 402 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 403 return rc ? -EFAULT : 0;
0fb97abe
JF		 404}
405
383d0b05 406static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 407{
383d0b05
JF		 408 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
409 struct kvm_s390_prefix_info prefix;
410
411 spin_lock(&li->lock);
412 prefix = li->irq.prefix;
413 li->irq.prefix.address = 0;
414 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
415 spin_unlock(&li->lock);
0fb97abe 416
383d0b05 417 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", prefix.address);
0fb97abe
JF		 418 vcpu->stat.deliver_prefix_signal++;
419 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
420 KVM_S390_SIGP_SET_PREFIX,
383d0b05 421 prefix.address, 0);
0fb97abe 422
383d0b05 423 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 424 return 0;
425}
426
383d0b05 427static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 428{
383d0b05 429 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 430 int rc;
383d0b05
JF		 431 int cpu_addr;
432
433 spin_lock(&li->lock);
434 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
435 clear_bit(cpu_addr, li->sigp_emerg_pending);
436 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
437 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
438 spin_unlock(&li->lock);
0fb97abe
JF		 439
440 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
441 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 442 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
443 cpu_addr, 0);
0fb97abe
JF		 444
445 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
446 (u16 *)__LC_EXT_INT_CODE);
383d0b05 447 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 448 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
449 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
450 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
451 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 452 return rc ? -EFAULT : 0;
0fb97abe
JF		 453}
454
383d0b05 455static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 456{
383d0b05
JF		 457 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
458 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 459 int rc;
460
383d0b05
JF		 461 spin_lock(&li->lock);
462 extcall = li->irq.extcall;
463 li->irq.extcall.code = 0;
464 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
465 spin_unlock(&li->lock);
466
0fb97abe
JF		 467 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
468 vcpu->stat.deliver_external_call++;
469 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
470 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 471 extcall.code, 0);
0fb97abe
JF		 472
473 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
474 (u16 *)__LC_EXT_INT_CODE);
383d0b05 475 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 476 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
477 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
478 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
479 sizeof(psw_t));
99e20009 480 return rc ? -EFAULT : 0;
0fb97abe
JF		 481}
482
383d0b05 483static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 484{
383d0b05
JF		 485 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
486 struct kvm_s390_pgm_info pgm_info;
8712836b 487 int rc = 0;
8a2ef71b 488 u16 ilc = get_ilc(vcpu);
8712836b 489
383d0b05
JF		 490 spin_lock(&li->lock);
491 pgm_info = li->irq.pgm;
492 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
493 memset(&li->irq.pgm, 0, sizeof(pgm_info));
494 spin_unlock(&li->lock);
495
0fb97abe 496 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
383d0b05 497 pgm_info.code, ilc);
0fb97abe
JF		 498 vcpu->stat.deliver_program_int++;
499 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 500 pgm_info.code, 0);
0fb97abe 501
383d0b05 502 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 503 case PGM_AFX_TRANSLATION:
504 case PGM_ASX_TRANSLATION:
505 case PGM_EX_TRANSLATION:
506 case PGM_LFX_TRANSLATION:
507 case PGM_LSTE_SEQUENCE:
508 case PGM_LSX_TRANSLATION:
509 case PGM_LX_TRANSLATION:
510 case PGM_PRIMARY_AUTHORITY:
511 case PGM_SECONDARY_AUTHORITY:
512 case PGM_SPACE_SWITCH:
383d0b05 513 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 514 (u64 *)__LC_TRANS_EXC_CODE);
515 break;
516 case PGM_ALEN_TRANSLATION:
517 case PGM_ALE_SEQUENCE:
518 case PGM_ASTE_INSTANCE:
519 case PGM_ASTE_SEQUENCE:
520 case PGM_ASTE_VALIDITY:
521 case PGM_EXTENDED_AUTHORITY:
383d0b05 522 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 523 (u8 *)__LC_EXC_ACCESS_ID);
524 break;
525 case PGM_ASCE_TYPE:
526 case PGM_PAGE_TRANSLATION:
527 case PGM_REGION_FIRST_TRANS:
528 case PGM_REGION_SECOND_TRANS:
529 case PGM_REGION_THIRD_TRANS:
530 case PGM_SEGMENT_TRANSLATION:
383d0b05 531 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 532 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 533 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 534 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 535 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b
DH		 536 (u8 *)__LC_OP_ACCESS_ID);
537 break;
538 case PGM_MONITOR:
383d0b05 539 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 540 (u16 *)__LC_MON_CLASS_NR);
383d0b05 541 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 542 (u64 *)__LC_MON_CODE);
543 break;
544 case PGM_DATA:
383d0b05 545 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 546 (u32 *)__LC_DATA_EXC_CODE);
547 break;
548 case PGM_PROTECTION:
383d0b05 549 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 550 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 551 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 552 (u8 *)__LC_EXC_ACCESS_ID);
553 break;
554 }
555
383d0b05
JF		 556 if (pgm_info.code & PGM_PER) {
557 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 558 (u8 *) __LC_PER_CODE);
383d0b05 559 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 560 (u8 *)__LC_PER_ATMID);
383d0b05 561 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 562 (u64 *) __LC_PER_ADDRESS);
383d0b05 563 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 564 (u8 *) __LC_PER_ACCESS_ID);
565 }
566
8a2ef71b 567 rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
383d0b05 568 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 569 (u16 *)__LC_PGM_INT_CODE);
570 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
571 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
572 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
573 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 574 return rc ? -EFAULT : 0;
0fb97abe
JF		 575}
576
577static int __must_check __deliver_service(struct kvm_vcpu *vcpu,
578 struct kvm_s390_interrupt_info *inti)
579{
580 int rc;
581
582 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
583 inti->ext.ext_params);
584 vcpu->stat.deliver_service_signal++;
585 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
586 inti->ext.ext_params, 0);
587
588 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 589 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 590 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
591 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
592 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
593 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
594 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
595 (u32 *)__LC_EXT_PARAMS);
99e20009 596 return rc ? -EFAULT : 0;
0fb97abe
JF		 597}
598
599static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu,
600 struct kvm_s390_interrupt_info *inti)
601{
602 int rc;
603
604 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
605 KVM_S390_INT_PFAULT_DONE, 0,
606 inti->ext.ext_params2);
8712836b 607
0fb97abe
JF		 608 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
609 rc |= put_guest_lc(vcpu, PFAULT_DONE, (u16 *)__LC_EXT_CPU_ADDR);
610 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
611 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
612 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
613 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
614 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
615 (u64 *)__LC_EXT_PARAMS2);
99e20009 616 return rc ? -EFAULT : 0;
0fb97abe
JF		 617}
618
619static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu,
620 struct kvm_s390_interrupt_info *inti)
621{
622 int rc;
623
624 VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
625 inti->ext.ext_params, inti->ext.ext_params2);
626 vcpu->stat.deliver_virtio_interrupt++;
627 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
628 inti->ext.ext_params,
629 inti->ext.ext_params2);
630
631 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
632 rc |= put_guest_lc(vcpu, VIRTIO_PARAM, (u16 *)__LC_EXT_CPU_ADDR);
633 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
634 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
635 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
636 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
637 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
638 (u32 *)__LC_EXT_PARAMS);
639 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
640 (u64 *)__LC_EXT_PARAMS2);
99e20009 641 return rc ? -EFAULT : 0;
0fb97abe
JF		 642}
643
644static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
645 struct kvm_s390_interrupt_info *inti)
646{
647 int rc;
648
649 VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
650 vcpu->stat.deliver_io_int++;
651 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
652 ((__u32)inti->io.subchannel_id << 16) |
653 inti->io.subchannel_nr,
654 ((__u64)inti->io.io_int_parm << 32) |
655 inti->io.io_int_word);
656
657 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
658 (u16 *)__LC_SUBCHANNEL_ID);
659 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
660 (u16 *)__LC_SUBCHANNEL_NR);
661 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
662 (u32 *)__LC_IO_INT_PARM);
663 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
664 (u32 *)__LC_IO_INT_WORD);
665 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
666 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
667 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
668 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 669 return rc ? -EFAULT : 0;
8712836b
DH		 670}
671
383d0b05
JF		 672static int __must_check __deliver_mchk_floating(struct kvm_vcpu *vcpu,
673 struct kvm_s390_interrupt_info *inti)
674{
675 struct kvm_s390_mchk_info *mchk = &inti->mchk;
676 int rc;
677
678 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
679 mchk->mcic);
680 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
681 mchk->cr14, mchk->mcic);
682
683 rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
684 rc |= put_guest_lc(vcpu, mchk->mcic,
685 (u64 __user *) __LC_MCCK_CODE);
686 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
687 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
688 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
689 &mchk->fixed_logout, sizeof(mchk->fixed_logout));
690 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
691 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
692 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
693 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 694 return rc ? -EFAULT : 0;
383d0b05
JF		 695}
696
697typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
698
699static const deliver_irq_t deliver_irq_funcs[] = {
700 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
701 [IRQ_PEND_PROG] = __deliver_prog,
702 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
703 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
704 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
705 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
706 [IRQ_PEND_RESTART] = __deliver_restart,
383d0b05
JF		 707 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
708 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
709};
710
711static int __must_check __deliver_floating_interrupt(struct kvm_vcpu *vcpu,
712 struct kvm_s390_interrupt_info *inti)
ba5c1e9b 713{
0fb97abe 714 int rc;
ba5c1e9b
CO		 715
716 switch (inti->type) {
ba5c1e9b 717 case KVM_S390_INT_SERVICE:
0fb97abe 718 rc = __deliver_service(vcpu, inti);
ba5c1e9b 719 break;
3c038e6b 720 case KVM_S390_INT_PFAULT_DONE:
0fb97abe 721 rc = __deliver_pfault_done(vcpu, inti);
3c038e6b 722 break;
ba5c1e9b 723 case KVM_S390_INT_VIRTIO:
0fb97abe 724 rc = __deliver_virtio(vcpu, inti);
ba5c1e9b 725 break;
48a3e950 726 case KVM_S390_MCHK:
383d0b05 727 rc = __deliver_mchk_floating(vcpu, inti);
48a3e950 728 break;
d8346b7d 729 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
0fb97abe 730 rc = __deliver_io(vcpu, inti);
d8346b7d 731 break;
ba5c1e9b
CO		 732 default:
733 BUG();
734 }
79395031
JF		 735
736 return rc;
ba5c1e9b
CO		 737}
738
ea5f4969
DH		 739/* Check whether an external call is pending (deliverable or not) */
740int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 741{
ea5f4969
DH		 742 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
743 uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
4953919f 744
ea5f4969
DH		 745 if (!sclp_has_sigpif())
746 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 747
ea5f4969
DH		 748 return (sigp_ctrl & SIGP_CTRL_C) &&
749 (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND);
4953919f
DH		 750}
751
9a022067 752int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 753{
180c12fb
CB		 754 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
755 struct kvm_s390_interrupt_info *inti;
383d0b05 756 int rc;
ba5c1e9b 757
383d0b05 758 rc = !!deliverable_local_irqs(vcpu);
ba5c1e9b
CO		 759
760 if ((!rc) && atomic_read(&fi->active)) {
b037a4f3 761 spin_lock(&fi->lock);
ba5c1e9b
CO		 762 list_for_each_entry(inti, &fi->list, list)
763 if (__interrupt_is_deliverable(vcpu, inti)) {
764 rc = 1;
765 break;
766 }
b037a4f3 767 spin_unlock(&fi->lock);
ba5c1e9b
CO		 768 }
769
bb78c5ec
DH		 770 if (!rc && kvm_cpu_has_pending_timer(vcpu))
771 rc = 1;
ba5c1e9b 772
ea5f4969
DH		 773 /* external call pending and deliverable */
774 if (!rc && kvm_s390_ext_call_pending(vcpu) &&
775 !psw_extint_disabled(vcpu) &&
776 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
4953919f
DH		 777 rc = 1;
778
9a022067 779 if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
6cddd432
DH		 780 rc = 1;
781
ba5c1e9b
CO		 782 return rc;
783}
784
3d80840d
MT		 785int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
786{
bb78c5ec
DH		 787 if (!(vcpu->arch.sie_block->ckc <
788 get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
789 return 0;
790 if (!ckc_interrupts_enabled(vcpu))
791 return 0;
792 return 1;
3d80840d
MT		 793}
794
ba5c1e9b
CO		 795int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
796{
797 u64 now, sltime;
ba5c1e9b
CO		 798
799 vcpu->stat.exit_wait_state++;
ba5c1e9b 800
0759d068
DH		 801 /* fast path */
802 if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu))
803 return 0;
e52b2af5 804
ba5c1e9b
CO		 805 if (psw_interrupts_disabled(vcpu)) {
806 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 807 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 808 }
809
bb78c5ec 810 if (!ckc_interrupts_enabled(vcpu)) {
ba5c1e9b 811 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 812 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 813 goto no_timer;
814 }
815
8c071b0f 816 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
ed4f2094 817 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
bda343ef
DH		 818
819 /* underflow */
820 if (vcpu->arch.sie_block->ckc < now)
821 return 0;
822
823 __set_cpu_idle(vcpu);
ca872302
CB		 824 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
825 VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
ba5c1e9b 826no_timer:
800c1065 827 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 828 kvm_vcpu_block(vcpu);
ba5c1e9b 829 __unset_cpu_idle(vcpu);
800c1065
TH		 830 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
831
2d00f759 832 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 833 return 0;
834}
835
0e9c85a5
DH		 836void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
837{
838 if (waitqueue_active(&vcpu->wq)) {
839 /*
840 * The vcpu gave up the cpu voluntarily, mark it as a good
841 * yield-candidate.
842 */
843 vcpu->preempted = true;
844 wake_up_interruptible(&vcpu->wq);
ce2e4f0b 845 vcpu->stat.halt_wakeup++;
0e9c85a5
DH		 846 }
847}
848
ca872302
CB		 849enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
850{
851 struct kvm_vcpu *vcpu;
2d00f759 852 u64 now, sltime;
ca872302
CB		 853
854 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
2d00f759
DH		 855 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
856 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
ca872302 857
2d00f759
DH		 858 /*
859 * If the monotonic clock runs faster than the tod clock we might be
860 * woken up too early and have to go back to sleep to avoid deadlocks.
861 */
862 if (vcpu->arch.sie_block->ckc > now &&
863 hrtimer_forward_now(timer, ns_to_ktime(sltime)))
864 return HRTIMER_RESTART;
865 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 866 return HRTIMER_NORESTART;
867}
ba5c1e9b 868
2ed10cc1
JF		 869void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
870{
871 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 872
4ae3c081 873 spin_lock(&li->lock);
383d0b05
JF		 874 li->pending_irqs = 0;
875 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
876 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 877 spin_unlock(&li->lock);
4953919f
DH		 878
879 /* clear pending external calls set by sigp interpretation facility */
383d0b05 880 atomic_clear_mask(CPUSTAT_ECALL_PEND, li->cpuflags);
ea5f4969 881 vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0;
2ed10cc1
JF		 882}
883
614aeab4 884int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 885{
180c12fb
CB		 886 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
887 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
888 struct kvm_s390_interrupt_info *n, *inti = NULL;
383d0b05 889 deliver_irq_t func;
ba5c1e9b 890 int deliver;
79395031 891 int rc = 0;
383d0b05
JF		 892 unsigned long irq_type;
893 unsigned long deliverable_irqs;
ba5c1e9b
CO		 894
895 __reset_intercept_indicators(vcpu);
ba5c1e9b 896
383d0b05
JF		 897 /* pending ckc conditions might have been invalidated */
898 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
899 if (kvm_cpu_has_pending_timer(vcpu))
900 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
901
902 do {
903 deliverable_irqs = deliverable_local_irqs(vcpu);
904 /* bits are in the order of interrupt priority */
905 irq_type = find_first_bit(&deliverable_irqs, IRQ_PEND_COUNT);
906 if (irq_type == IRQ_PEND_COUNT)
907 break;
908 func = deliver_irq_funcs[irq_type];
909 if (!func) {
910 WARN_ON_ONCE(func == NULL);
911 clear_bit(irq_type, &li->pending_irqs);
912 continue;
913 }
914 rc = func(vcpu);
915 } while (!rc && irq_type != IRQ_PEND_COUNT);
916
917 set_intercept_indicators_local(vcpu);
ba5c1e9b 918
79395031 919 if (!rc && atomic_read(&fi->active)) {
ba5c1e9b
CO		 920 do {
921 deliver = 0;
b037a4f3 922 spin_lock(&fi->lock);
ba5c1e9b
CO		 923 list_for_each_entry_safe(inti, n, &fi->list, list) {
924 if (__interrupt_is_deliverable(vcpu, inti)) {
925 list_del(&inti->list);
a91b8ebe 926 fi->irq_count--;
ba5c1e9b
CO		 927 deliver = 1;
928 break;
929 }
930 __set_intercept_indicator(vcpu, inti);
931 }
932 if (list_empty(&fi->list))
933 atomic_set(&fi->active, 0);
b037a4f3 934 spin_unlock(&fi->lock);
ba5c1e9b 935 if (deliver) {
383d0b05 936 rc = __deliver_floating_interrupt(vcpu, inti);
ba5c1e9b
CO		 937 kfree(inti);
938 }
79395031 939 } while (!rc && deliver);
ba5c1e9b 940 }
79395031
JF		 941
942 return rc;
ba5c1e9b
CO		 943}
944
383d0b05 945static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 946{
947 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
948
383d0b05 949 li->irq.pgm = irq->u.pgm;
9185124e 950 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 951 return 0;
952}
953
ba5c1e9b
CO		 954int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
955{
180c12fb 956 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 957 struct kvm_s390_irq irq;
ba5c1e9b
CO		 958
959 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
383d0b05
JF		 960 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, code,
961 0, 1);
4ae3c081 962 spin_lock(&li->lock);
383d0b05
JF		 963 irq.u.pgm.code = code;
964 __inject_prog(vcpu, &irq);
d0321a24 965 BUG_ON(waitqueue_active(li->wq));
4ae3c081 966 spin_unlock(&li->lock);
bcd84683
JF		 967 return 0;
968}
969
970int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
971 struct kvm_s390_pgm_info *pgm_info)
972{
973 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 974 struct kvm_s390_irq irq;
0146a7b0 975 int rc;
bcd84683 976
bcd84683
JF		 977 VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
978 pgm_info->code);
979 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
980 pgm_info->code, 0, 1);
4ae3c081 981 spin_lock(&li->lock);
383d0b05
JF		 982 irq.u.pgm = *pgm_info;
983 rc = __inject_prog(vcpu, &irq);
bcd84683 984 BUG_ON(waitqueue_active(li->wq));
4ae3c081 985 spin_unlock(&li->lock);
0146a7b0
JF		 986 return rc;
987}
988
383d0b05 989static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 990{
991 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
992
383d0b05
JF		 993 VCPU_EVENT(vcpu, 3, "inject: external irq params:%x, params2:%llx",
994 irq->u.ext.ext_params, irq->u.ext.ext_params2);
995 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
996 irq->u.ext.ext_params,
997 irq->u.ext.ext_params2, 2);
998
999 li->irq.ext = irq->u.ext;
1000 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
0146a7b0
JF		 1001 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1002 return 0;
1003}
1004
ea5f4969
DH		 1005static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id)
1006{
1007 unsigned char new_val, old_val;
1008 uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
1009
1010 new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK);
1011 old_val = *sigp_ctrl & ~SIGP_CTRL_C;
1012 if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) {
1013 /* another external call is pending */
1014 return -EBUSY;
1015 }
1016 atomic_set_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
1017 return 0;
1018}
1019
0675d92d 1020static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1021{
1022 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1023 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1024 uint16_t src_id = irq->u.extcall.code;
0146a7b0
JF		 1025
1026 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
ea5f4969 1027 src_id);
383d0b05 1028 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ea5f4969
DH		 1029 src_id, 0, 2);
1030
1031 /* sending vcpu invalid */
1032 if (src_id >= KVM_MAX_VCPUS ||
1033 kvm_get_vcpu(vcpu->kvm, src_id) == NULL)
1034 return -EINVAL;
1035
1036 if (sclp_has_sigpif())
1037 return __inject_extcall_sigpif(vcpu, src_id);
383d0b05 1038
ea5f4969
DH		 1039 if (!test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
1040 return -EBUSY;
383d0b05 1041 *extcall = irq->u.extcall;
0146a7b0
JF		 1042 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1043 return 0;
1044}
1045
383d0b05 1046static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1047{
1048 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1049 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0
JF		 1050
1051 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
383d0b05
JF		 1052 prefix->address);
1053 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
1054 prefix->address, 0, 2);
1055
a3a9c59a
DH		 1056 if (!is_vcpu_stopped(vcpu))
1057 return -EBUSY;
1058
383d0b05
JF		 1059 *prefix = irq->u.prefix;
1060 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1061 return 0;
1062}
1063
6cddd432 1064#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1065static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1066{
1067 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1068 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1069 int rc = 0;
0146a7b0 1070
383d0b05
JF		 1071 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0, 2);
1072
2822545f
DH		 1073 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1074 return -EINVAL;
1075
6cddd432
DH		 1076 if (is_vcpu_stopped(vcpu)) {
1077 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1078 rc = kvm_s390_store_status_unloaded(vcpu,
1079 KVM_S390_STORE_STATUS_NOADDR);
1080 return rc;
1081 }
1082
1083 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1084 return -EBUSY;
2822545f 1085 stop->flags = irq->u.stop.flags;
6cddd432 1086 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1087 return 0;
1088}
1089
1090static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1091 struct kvm_s390_irq *irq)
0146a7b0
JF		 1092{
1093 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1094
383d0b05
JF		 1095 VCPU_EVENT(vcpu, 3, "inject: restart type %llx", irq->type);
1096 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0, 2);
1097
1098 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1099 return 0;
1100}
1101
1102static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1103 struct kvm_s390_irq *irq)
0146a7b0
JF		 1104{
1105 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1106 struct kvm_s390_emerg_info *emerg = &li->irq.emerg;
0146a7b0 1107
383d0b05
JF		 1108 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n",
1109 irq->u.emerg.code);
1110 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
1111 emerg->code, 0, 2);
1112
1113 set_bit(emerg->code, li->sigp_emerg_pending);
1114 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
0146a7b0
JF		 1115 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1116 return 0;
1117}
1118
383d0b05 1119static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1120{
1121 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1122 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0
JF		 1123
1124 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
383d0b05
JF		 1125 mchk->mcic);
1126 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
1127 mchk->mcic, 2);
1128
1129 /*
fc2020cf
JF		 1130 * Because repressible machine checks can be indicated along with
1131 * exigent machine checks (PoP, Chapter 11, Interruption action)
1132 * we need to combine cr14, mcic and external damage code.
1133 * Failing storage address and the logout area should not be or'ed
1134 * together, we just indicate the last occurrence of the corresponding
1135 * machine check
383d0b05 1136 */
fc2020cf 1137 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1138 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1139 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1140 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1141 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1142 sizeof(mchk->fixed_logout));
383d0b05
JF		 1143 if (mchk->mcic & MCHK_EX_MASK)
1144 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1145 else if (mchk->mcic & MCHK_REP_MASK)
1146 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1147 return 0;
1148}
1149
383d0b05 1150static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1151{
1152 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1153
383d0b05
JF		 1154 VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CLOCK_COMP);
1155 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
1156 0, 0, 2);
1157
1158 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
0146a7b0
JF		 1159 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1160 return 0;
1161}
1162
383d0b05 1163static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1164{
1165 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1166
383d0b05
JF		 1167 VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CPU_TIMER);
1168 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
1169 0, 0, 2);
1170
1171 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
0146a7b0 1172 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
ba5c1e9b
CO		 1173 return 0;
1174}
1175
383d0b05 1176
fa6b7fe9
CH		 1177struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
1178 u64 cr6, u64 schid)
1179{
1180 struct kvm_s390_float_interrupt *fi;
1181 struct kvm_s390_interrupt_info *inti, *iter;
1182
1183 if ((!schid && !cr6) || (schid && cr6))
1184 return NULL;
1185 mutex_lock(&kvm->lock);
1186 fi = &kvm->arch.float_int;
1187 spin_lock(&fi->lock);
1188 inti = NULL;
1189 list_for_each_entry(iter, &fi->list, list) {
1190 if (!is_ioint(iter->type))
1191 continue;
79fd50c6
CH		 1192 if (cr6 &&
1193 ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
fa6b7fe9
CH		 1194 continue;
1195 if (schid) {
1196 if (((schid & 0x00000000ffff0000) >> 16) !=
1197 iter->io.subchannel_id)
1198 continue;
1199 if ((schid & 0x000000000000ffff) !=
1200 iter->io.subchannel_nr)
1201 continue;
1202 }
1203 inti = iter;
1204 break;
1205 }
a91b8ebe 1206 if (inti) {
fa6b7fe9 1207 list_del_init(&inti->list);
a91b8ebe
JF		 1208 fi->irq_count--;
1209 }
fa6b7fe9
CH		 1210 if (list_empty(&fi->list))
1211 atomic_set(&fi->active, 0);
1212 spin_unlock(&fi->lock);
1213 mutex_unlock(&kvm->lock);
1214 return inti;
1215}
ba5c1e9b 1216
a91b8ebe 1217static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
ba5c1e9b 1218{
180c12fb
CB		 1219 struct kvm_s390_local_interrupt *li;
1220 struct kvm_s390_float_interrupt *fi;
c05c4186 1221 struct kvm_s390_interrupt_info *iter;
1ee0bc55 1222 struct kvm_vcpu *dst_vcpu = NULL;
ba5c1e9b 1223 int sigcpu;
a91b8ebe 1224 int rc = 0;
ba5c1e9b 1225
c05c4186
JF		 1226 mutex_lock(&kvm->lock);
1227 fi = &kvm->arch.float_int;
1228 spin_lock(&fi->lock);
a91b8ebe
JF		 1229 if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
1230 rc = -EINVAL;
1231 goto unlock_fi;
1232 }
1233 fi->irq_count++;
c05c4186
JF		 1234 if (!is_ioint(inti->type)) {
1235 list_add_tail(&inti->list, &fi->list);
1236 } else {
1237 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
1238
1239 /* Keep I/O interrupts sorted in isc order. */
1240 list_for_each_entry(iter, &fi->list, list) {
1241 if (!is_ioint(iter->type))
1242 continue;
1243 if (int_word_to_isc_bits(iter->io.io_int_word)
1244 <= isc_bits)
1245 continue;
1246 break;
1247 }
1248 list_add_tail(&inti->list, &iter->list);
1249 }
1250 atomic_set(&fi->active, 1);
1251 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
1252 if (sigcpu == KVM_MAX_VCPUS) {
1253 do {
1254 sigcpu = fi->next_rr_cpu++;
1255 if (sigcpu == KVM_MAX_VCPUS)
1256 sigcpu = fi->next_rr_cpu = 0;
1ee0bc55 1257 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
c05c4186 1258 }
1ee0bc55
JF		 1259 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1260 li = &dst_vcpu->arch.local_int;
4ae3c081 1261 spin_lock(&li->lock);
da00fcbd
CB		 1262 switch (inti->type) {
1263 case KVM_S390_MCHK:
1264 atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
1265 break;
1266 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1267 atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
1268 break;
1269 default:
1270 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1271 break;
1272 }
4ae3c081 1273 spin_unlock(&li->lock);
0e9c85a5 1274 kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
a91b8ebe 1275unlock_fi:
c05c4186
JF		 1276 spin_unlock(&fi->lock);
1277 mutex_unlock(&kvm->lock);
a91b8ebe 1278 return rc;
c05c4186
JF		 1279}
1280
1281int kvm_s390_inject_vm(struct kvm *kvm,
1282 struct kvm_s390_interrupt *s390int)
1283{
1284 struct kvm_s390_interrupt_info *inti;
1285
ba5c1e9b
CO		 1286 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1287 if (!inti)
1288 return -ENOMEM;
1289
c05c4186
JF		 1290 inti->type = s390int->type;
1291 switch (inti->type) {
ba5c1e9b 1292 case KVM_S390_INT_VIRTIO:
33e19115 1293 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1294 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1295 inti->ext.ext_params = s390int->parm;
1296 inti->ext.ext_params2 = s390int->parm64;
1297 break;
1298 case KVM_S390_INT_SERVICE:
1299 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1300 inti->ext.ext_params = s390int->parm;
1301 break;
3c038e6b
DD		 1302 case KVM_S390_INT_PFAULT_DONE:
1303 inti->type = s390int->type;
1304 inti->ext.ext_params2 = s390int->parm64;
1305 break;
48a3e950
CH		 1306 case KVM_S390_MCHK:
1307 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
1308 s390int->parm64);
48a3e950
CH		 1309 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1310 inti->mchk.mcic = s390int->parm64;
1311 break;
d8346b7d 1312 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
c05c4186 1313 if (inti->type & IOINT_AI_MASK)
d8346b7d
CH		 1314 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
1315 else
1316 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
1317 s390int->type & IOINT_CSSID_MASK,
1318 s390int->type & IOINT_SSID_MASK,
1319 s390int->type & IOINT_SCHID_MASK);
d8346b7d
CH		 1320 inti->io.subchannel_id = s390int->parm >> 16;
1321 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1322 inti->io.io_int_parm = s390int->parm64 >> 32;
1323 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1324 break;
ba5c1e9b
CO		 1325 default:
1326 kfree(inti);
1327 return -EINVAL;
1328 }
ade38c31
CH		 1329 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1330 2);
ba5c1e9b 1331
a91b8ebe 1332 return __inject_vm(kvm, inti);
ba5c1e9b
CO		 1333}
1334
2f32d4ea
CH		 1335void kvm_s390_reinject_io_int(struct kvm *kvm,
1336 struct kvm_s390_interrupt_info *inti)
1337{
1338 __inject_vm(kvm, inti);
1339}
1340
383d0b05
JF		 1341int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1342 struct kvm_s390_irq *irq)
1343{
1344 irq->type = s390int->type;
1345 switch (irq->type) {
1346 case KVM_S390_PROGRAM_INT:
1347 if (s390int->parm & 0xffff0000)
1348 return -EINVAL;
1349 irq->u.pgm.code = s390int->parm;
1350 break;
1351 case KVM_S390_SIGP_SET_PREFIX:
1352 irq->u.prefix.address = s390int->parm;
1353 break;
2822545f
DH		 1354 case KVM_S390_SIGP_STOP:
1355 irq->u.stop.flags = s390int->parm;
1356 break;
383d0b05
JF		 1357 case KVM_S390_INT_EXTERNAL_CALL:
1358 if (irq->u.extcall.code & 0xffff0000)
1359 return -EINVAL;
1360 irq->u.extcall.code = s390int->parm;
1361 break;
1362 case KVM_S390_INT_EMERGENCY:
1363 if (irq->u.emerg.code & 0xffff0000)
1364 return -EINVAL;
1365 irq->u.emerg.code = s390int->parm;
1366 break;
1367 case KVM_S390_MCHK:
1368 irq->u.mchk.mcic = s390int->parm64;
1369 break;
1370 }
1371 return 0;
1372}
1373
6cddd432
DH		 1374int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1375{
1376 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1377
1378 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1379}
1380
1381void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1382{
1383 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1384
1385 spin_lock(&li->lock);
1386 li->irq.stop.flags = 0;
1387 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1388 spin_unlock(&li->lock);
1389}
1390
383d0b05 1391int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 1392{
0146a7b0 1393 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0146a7b0 1394 int rc;
ba5c1e9b 1395
0146a7b0 1396 spin_lock(&li->lock);
383d0b05 1397 switch (irq->type) {
ba5c1e9b 1398 case KVM_S390_PROGRAM_INT:
ba5c1e9b 1399 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
383d0b05
JF		 1400 irq->u.pgm.code);
1401 rc = __inject_prog(vcpu, irq);
ba5c1e9b 1402 break;
b7e6e4d3 1403 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 1404 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 1405 break;
ba5c1e9b 1406 case KVM_S390_SIGP_STOP:
383d0b05 1407 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 1408 break;
ba5c1e9b 1409 case KVM_S390_RESTART:
383d0b05 1410 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 1411 break;
e029ae5b 1412 case KVM_S390_INT_CLOCK_COMP:
383d0b05 1413 rc = __inject_ckc(vcpu);
0146a7b0 1414 break;
e029ae5b 1415 case KVM_S390_INT_CPU_TIMER:
383d0b05 1416 rc = __inject_cpu_timer(vcpu);
82a12737 1417 break;
7697e71f 1418 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 1419 rc = __inject_extcall(vcpu, irq);
82a12737 1420 break;
ba5c1e9b 1421 case KVM_S390_INT_EMERGENCY:
383d0b05 1422 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 1423 break;
48a3e950 1424 case KVM_S390_MCHK:
383d0b05 1425 rc = __inject_mchk(vcpu, irq);
48a3e950 1426 break;
3c038e6b 1427 case KVM_S390_INT_PFAULT_INIT:
383d0b05 1428 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 1429 break;
ba5c1e9b
CO		 1430 case KVM_S390_INT_VIRTIO:
1431 case KVM_S390_INT_SERVICE:
d8346b7d 1432 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 1433 default:
0146a7b0 1434 rc = -EINVAL;
ba5c1e9b 1435 }
4ae3c081 1436 spin_unlock(&li->lock);
0146a7b0
JF		 1437 if (!rc)
1438 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 1439 return rc;
ba5c1e9b 1440}
c05c4186 1441
67335e63 1442void kvm_s390_clear_float_irqs(struct kvm *kvm)
c05c4186
JF		 1443{
1444 struct kvm_s390_float_interrupt *fi;
1445 struct kvm_s390_interrupt_info *n, *inti = NULL;
1446
1447 mutex_lock(&kvm->lock);
1448 fi = &kvm->arch.float_int;
1449 spin_lock(&fi->lock);
1450 list_for_each_entry_safe(inti, n, &fi->list, list) {
1451 list_del(&inti->list);
1452 kfree(inti);
1453 }
a91b8ebe 1454 fi->irq_count = 0;
c05c4186
JF		 1455 atomic_set(&fi->active, 0);
1456 spin_unlock(&fi->lock);
1457 mutex_unlock(&kvm->lock);
1458}
1459
1460static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti,
1461 u8 *addr)
1462{
1463 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1464 struct kvm_s390_irq irq = {0};
1465
1466 irq.type = inti->type;
1467 switch (inti->type) {
3c038e6b
DD		 1468 case KVM_S390_INT_PFAULT_INIT:
1469 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1470 case KVM_S390_INT_VIRTIO:
1471 case KVM_S390_INT_SERVICE:
1472 irq.u.ext = inti->ext;
1473 break;
1474 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1475 irq.u.io = inti->io;
1476 break;
1477 case KVM_S390_MCHK:
1478 irq.u.mchk = inti->mchk;
1479 break;
1480 default:
1481 return -EINVAL;
1482 }
1483
1484 if (copy_to_user(uptr, &irq, sizeof(irq)))
1485 return -EFAULT;
1486
1487 return 0;
1488}
1489
1490static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len)
1491{
1492 struct kvm_s390_interrupt_info *inti;
1493 struct kvm_s390_float_interrupt *fi;
1494 int ret = 0;
1495 int n = 0;
1496
1497 mutex_lock(&kvm->lock);
1498 fi = &kvm->arch.float_int;
1499 spin_lock(&fi->lock);
1500
1501 list_for_each_entry(inti, &fi->list, list) {
1502 if (len < sizeof(struct kvm_s390_irq)) {
1503 /* signal userspace to try again */
1504 ret = -ENOMEM;
1505 break;
1506 }
1507 ret = copy_irq_to_user(inti, buf);
1508 if (ret)
1509 break;
1510 buf += sizeof(struct kvm_s390_irq);
1511 len -= sizeof(struct kvm_s390_irq);
1512 n++;
1513 }
1514
1515 spin_unlock(&fi->lock);
1516 mutex_unlock(&kvm->lock);
1517
1518 return ret < 0 ? ret : n;
1519}
1520
1521static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1522{
1523 int r;
1524
1525 switch (attr->group) {
1526 case KVM_DEV_FLIC_GET_ALL_IRQS:
1527 r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr,
1528 attr->attr);
1529 break;
1530 default:
1531 r = -EINVAL;
1532 }
1533
1534 return r;
1535}
1536
1537static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1538 u64 addr)
1539{
1540 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1541 void *target = NULL;
1542 void __user *source;
1543 u64 size;
1544
1545 if (get_user(inti->type, (u64 __user *)addr))
1546 return -EFAULT;
1547
1548 switch (inti->type) {
3c038e6b
DD		 1549 case KVM_S390_INT_PFAULT_INIT:
1550 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1551 case KVM_S390_INT_VIRTIO:
1552 case KVM_S390_INT_SERVICE:
1553 target = (void *) &inti->ext;
1554 source = &uptr->u.ext;
1555 size = sizeof(inti->ext);
1556 break;
1557 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1558 target = (void *) &inti->io;
1559 source = &uptr->u.io;
1560 size = sizeof(inti->io);
1561 break;
1562 case KVM_S390_MCHK:
1563 target = (void *) &inti->mchk;
1564 source = &uptr->u.mchk;
1565 size = sizeof(inti->mchk);
1566 break;
1567 default:
1568 return -EINVAL;
1569 }
1570
1571 if (copy_from_user(target, source, size))
1572 return -EFAULT;
1573
1574 return 0;
1575}
1576
1577static int enqueue_floating_irq(struct kvm_device *dev,
1578 struct kvm_device_attr *attr)
1579{
1580 struct kvm_s390_interrupt_info *inti = NULL;
1581 int r = 0;
1582 int len = attr->attr;
1583
1584 if (len % sizeof(struct kvm_s390_irq) != 0)
1585 return -EINVAL;
1586 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1587 return -EINVAL;
1588
1589 while (len >= sizeof(struct kvm_s390_irq)) {
1590 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1591 if (!inti)
1592 return -ENOMEM;
1593
1594 r = copy_irq_from_user(inti, attr->addr);
1595 if (r) {
1596 kfree(inti);
1597 return r;
1598 }
a91b8ebe
JF		 1599 r = __inject_vm(dev->kvm, inti);
1600 if (r) {
1601 kfree(inti);
1602 return r;
1603 }
c05c4186
JF		 1604 len -= sizeof(struct kvm_s390_irq);
1605 attr->addr += sizeof(struct kvm_s390_irq);
1606 }
1607
1608 return r;
1609}
1610
841b91c5
CH		 1611static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1612{
1613 if (id >= MAX_S390_IO_ADAPTERS)
1614 return NULL;
1615 return kvm->arch.adapters[id];
1616}
1617
1618static int register_io_adapter(struct kvm_device *dev,
1619 struct kvm_device_attr *attr)
1620{
1621 struct s390_io_adapter *adapter;
1622 struct kvm_s390_io_adapter adapter_info;
1623
1624 if (copy_from_user(&adapter_info,
1625 (void __user *)attr->addr, sizeof(adapter_info)))
1626 return -EFAULT;
1627
1628 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1629 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1630 return -EINVAL;
1631
1632 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1633 if (!adapter)
1634 return -ENOMEM;
1635
1636 INIT_LIST_HEAD(&adapter->maps);
1637 init_rwsem(&adapter->maps_lock);
1638 atomic_set(&adapter->nr_maps, 0);
1639 adapter->id = adapter_info.id;
1640 adapter->isc = adapter_info.isc;
1641 adapter->maskable = adapter_info.maskable;
1642 adapter->masked = false;
1643 adapter->swap = adapter_info.swap;
1644 dev->kvm->arch.adapters[adapter->id] = adapter;
1645
1646 return 0;
1647}
1648
1649int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1650{
1651 int ret;
1652 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1653
1654 if (!adapter || !adapter->maskable)
1655 return -EINVAL;
1656 ret = adapter->masked;
1657 adapter->masked = masked;
1658 return ret;
1659}
1660
1661static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1662{
1663 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1664 struct s390_map_info *map;
1665 int ret;
1666
1667 if (!adapter || !addr)
1668 return -EINVAL;
1669
1670 map = kzalloc(sizeof(*map), GFP_KERNEL);
1671 if (!map) {
1672 ret = -ENOMEM;
1673 goto out;
1674 }
1675 INIT_LIST_HEAD(&map->list);
1676 map->guest_addr = addr;
6e0a0431 1677 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 1678 if (map->addr == -EFAULT) {
1679 ret = -EFAULT;
1680 goto out;
1681 }
1682 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1683 if (ret < 0)
1684 goto out;
1685 BUG_ON(ret != 1);
1686 down_write(&adapter->maps_lock);
1687 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1688 list_add_tail(&map->list, &adapter->maps);
1689 ret = 0;
1690 } else {
1691 put_page(map->page);
1692 ret = -EINVAL;
1693 }
1694 up_write(&adapter->maps_lock);
1695out:
1696 if (ret)
1697 kfree(map);
1698 return ret;
1699}
1700
1701static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1702{
1703 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1704 struct s390_map_info *map, *tmp;
1705 int found = 0;
1706
1707 if (!adapter || !addr)
1708 return -EINVAL;
1709
1710 down_write(&adapter->maps_lock);
1711 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1712 if (map->guest_addr == addr) {
1713 found = 1;
1714 atomic_dec(&adapter->nr_maps);
1715 list_del(&map->list);
1716 put_page(map->page);
1717 kfree(map);
1718 break;
1719 }
1720 }
1721 up_write(&adapter->maps_lock);
1722
1723 return found ? 0 : -EINVAL;
1724}
1725
1726void kvm_s390_destroy_adapters(struct kvm *kvm)
1727{
1728 int i;
1729 struct s390_map_info *map, *tmp;
1730
1731 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1732 if (!kvm->arch.adapters[i])
1733 continue;
1734 list_for_each_entry_safe(map, tmp,
1735 &kvm->arch.adapters[i]->maps, list) {
1736 list_del(&map->list);
1737 put_page(map->page);
1738 kfree(map);
1739 }
1740 kfree(kvm->arch.adapters[i]);
1741 }
1742}
1743
1744static int modify_io_adapter(struct kvm_device *dev,
1745 struct kvm_device_attr *attr)
1746{
1747 struct kvm_s390_io_adapter_req req;
1748 struct s390_io_adapter *adapter;
1749 int ret;
1750
1751 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1752 return -EFAULT;
1753
1754 adapter = get_io_adapter(dev->kvm, req.id);
1755 if (!adapter)
1756 return -EINVAL;
1757 switch (req.type) {
1758 case KVM_S390_IO_ADAPTER_MASK:
1759 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1760 if (ret > 0)
1761 ret = 0;
1762 break;
1763 case KVM_S390_IO_ADAPTER_MAP:
1764 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1765 break;
1766 case KVM_S390_IO_ADAPTER_UNMAP:
1767 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1768 break;
1769 default:
1770 ret = -EINVAL;
1771 }
1772
1773 return ret;
1774}
1775
c05c4186
JF		 1776static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1777{
1778 int r = 0;
3c038e6b
DD		 1779 unsigned int i;
1780 struct kvm_vcpu *vcpu;
c05c4186
JF		 1781
1782 switch (attr->group) {
1783 case KVM_DEV_FLIC_ENQUEUE:
1784 r = enqueue_floating_irq(dev, attr);
1785 break;
1786 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 1787 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 1788 break;
3c038e6b
DD		 1789 case KVM_DEV_FLIC_APF_ENABLE:
1790 dev->kvm->arch.gmap->pfault_enabled = 1;
1791 break;
1792 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1793 dev->kvm->arch.gmap->pfault_enabled = 0;
1794 /*
1795 * Make sure no async faults are in transition when
1796 * clearing the queues. So we don't need to worry
1797 * about late coming workers.
1798 */
1799 synchronize_srcu(&dev->kvm->srcu);
1800 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1801 kvm_clear_async_pf_completion_queue(vcpu);
1802 break;
841b91c5
CH		 1803 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1804 r = register_io_adapter(dev, attr);
1805 break;
1806 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1807 r = modify_io_adapter(dev, attr);
1808 break;
c05c4186
JF		 1809 default:
1810 r = -EINVAL;
1811 }
1812
1813 return r;
1814}
1815
1816static int flic_create(struct kvm_device *dev, u32 type)
1817{
1818 if (!dev)
1819 return -EINVAL;
1820 if (dev->kvm->arch.flic)
1821 return -EINVAL;
1822 dev->kvm->arch.flic = dev;
1823 return 0;
1824}
1825
1826static void flic_destroy(struct kvm_device *dev)
1827{
1828 dev->kvm->arch.flic = NULL;
1829 kfree(dev);
1830}
1831
1832/* s390 floating irq controller (flic) */
1833struct kvm_device_ops kvm_flic_ops = {
1834 .name = "kvm-flic",
1835 .get_attr = flic_get_attr,
1836 .set_attr = flic_set_attr,
1837 .create = flic_create,
1838 .destroy = flic_destroy,
1839};
84223598
CH		 1840
1841static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
1842{
1843 unsigned long bit;
1844
1845 bit = bit_nr + (addr % PAGE_SIZE) * 8;
1846
1847 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
1848}
1849
1850static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
1851 u64 addr)
1852{
1853 struct s390_map_info *map;
1854
1855 if (!adapter)
1856 return NULL;
1857
1858 list_for_each_entry(map, &adapter->maps, list) {
1859 if (map->guest_addr == addr)
1860 return map;
1861 }
1862 return NULL;
1863}
1864
1865static int adapter_indicators_set(struct kvm *kvm,
1866 struct s390_io_adapter *adapter,
1867 struct kvm_s390_adapter_int *adapter_int)
1868{
1869 unsigned long bit;
1870 int summary_set, idx;
1871 struct s390_map_info *info;
1872 void *map;
1873
1874 info = get_map_info(adapter, adapter_int->ind_addr);
1875 if (!info)
1876 return -1;
1877 map = page_address(info->page);
1878 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
1879 set_bit(bit, map);
1880 idx = srcu_read_lock(&kvm->srcu);
1881 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1882 set_page_dirty_lock(info->page);
1883 info = get_map_info(adapter, adapter_int->summary_addr);
1884 if (!info) {
1885 srcu_read_unlock(&kvm->srcu, idx);
1886 return -1;
1887 }
1888 map = page_address(info->page);
1889 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
1890 adapter->swap);
1891 summary_set = test_and_set_bit(bit, map);
1892 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1893 set_page_dirty_lock(info->page);
1894 srcu_read_unlock(&kvm->srcu, idx);
1895 return summary_set ? 0 : 1;
1896}
1897
1898/*
1899 * < 0 - not injected due to error
1900 * = 0 - coalesced, summary indicator already active
1901 * > 0 - injected interrupt
1902 */
1903static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
1904 struct kvm *kvm, int irq_source_id, int level,
1905 bool line_status)
1906{
1907 int ret;
1908 struct s390_io_adapter *adapter;
1909
1910 /* We're only interested in the 0->1 transition. */
1911 if (!level)
1912 return 0;
1913 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
1914 if (!adapter)
1915 return -1;
1916 down_read(&adapter->maps_lock);
1917 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
1918 up_read(&adapter->maps_lock);
1919 if ((ret > 0) && !adapter->masked) {
1920 struct kvm_s390_interrupt s390int = {
1921 .type = KVM_S390_INT_IO(1, 0, 0, 0),
1922 .parm = 0,
1923 .parm64 = (adapter->isc << 27) | 0x80000000,
1924 };
1925 ret = kvm_s390_inject_vm(kvm, &s390int);
1926 if (ret == 0)
1927 ret = 1;
1928 }
1929 return ret;
1930}
1931
8ba918d4 1932int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 1933 const struct kvm_irq_routing_entry *ue)
1934{
1935 int ret;
1936
1937 switch (ue->type) {
1938 case KVM_IRQ_ROUTING_S390_ADAPTER:
1939 e->set = set_adapter_int;
1940 e->adapter.summary_addr = ue->u.adapter.summary_addr;
1941 e->adapter.ind_addr = ue->u.adapter.ind_addr;
1942 e->adapter.summary_offset = ue->u.adapter.summary_offset;
1943 e->adapter.ind_offset = ue->u.adapter.ind_offset;
1944 e->adapter.adapter_id = ue->u.adapter.adapter_id;
1945 ret = 0;
1946 break;
1947 default:
1948 ret = -EINVAL;
1949 }
1950
1951 return ret;
1952}
1953
1954int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
1955 int irq_source_id, int level, bool line_status)
1956{
1957 return -EINVAL;
1958}
ubuntu-bionic-kernel mirror