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KVM: s390: Cleanup usage of current->mm in set_guest_storage_key
[mirror_ubuntu-kernels.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>
cbb870c8
HC		 19#include <asm/asm-offsets.h>
20#include <asm/uaccess.h>
ba5c1e9b
CO		 21#include "kvm-s390.h"
22#include "gaccess.h"
ade38c31 23#include "trace-s390.h"
ba5c1e9b 24
d8346b7d
CH		 25#define IOINT_SCHID_MASK 0x0000ffff
26#define IOINT_SSID_MASK 0x00030000
27#define IOINT_CSSID_MASK 0x03fc0000
28#define IOINT_AI_MASK 0x04000000
44c6ca3d 29#define PFAULT_INIT 0x0600
d8346b7d 30
614aeab4 31static int __must_check deliver_ckc_interrupt(struct kvm_vcpu *vcpu);
e029ae5b 32
d8346b7d
CH		 33static int is_ioint(u64 type)
34{
35 return ((type & 0xfffe0000u) != 0xfffe0000u);
36}
37
3c038e6b 38int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 39{
40 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
41}
42
d8346b7d
CH		 43static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
44{
45 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
46}
47
48a3e950
CH		 48static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
49{
50 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
51}
52
ba5c1e9b
CO		 53static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
54{
55 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
56 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
57 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
58 return 0;
59 return 1;
60}
61
bb78c5ec
DH		 62static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
63{
64 if (psw_extint_disabled(vcpu) ||
65 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
66 return 0;
f71d0dc5
DH		 67 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
68 /* No timer interrupts when single stepping */
69 return 0;
bb78c5ec
DH		 70 return 1;
71}
72
79fd50c6
CH		 73static u64 int_word_to_isc_bits(u32 int_word)
74{
75 u8 isc = (int_word & 0x38000000) >> 27;
76
77 return (0x80 >> isc) << 24;
78}
79
614aeab4 80static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
180c12fb 81 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 82{
83 switch (inti->type) {
7697e71f
CE		 84 case KVM_S390_INT_EXTERNAL_CALL:
85 if (psw_extint_disabled(vcpu))
86 return 0;
87 if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
88 return 1;
f346026e 89 return 0;
ba5c1e9b
CO		 90 case KVM_S390_INT_EMERGENCY:
91 if (psw_extint_disabled(vcpu))
92 return 0;
93 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
94 return 1;
95 return 0;
e029ae5b
TH		 96 case KVM_S390_INT_CLOCK_COMP:
97 return ckc_interrupts_enabled(vcpu);
98 case KVM_S390_INT_CPU_TIMER:
99 if (psw_extint_disabled(vcpu))
100 return 0;
101 if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
102 return 1;
103 return 0;
ba5c1e9b 104 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 105 case KVM_S390_INT_PFAULT_INIT:
106 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 107 case KVM_S390_INT_VIRTIO:
108 if (psw_extint_disabled(vcpu))
109 return 0;
110 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
111 return 1;
112 return 0;
113 case KVM_S390_PROGRAM_INT:
114 case KVM_S390_SIGP_STOP:
115 case KVM_S390_SIGP_SET_PREFIX:
116 case KVM_S390_RESTART:
117 return 1;
48a3e950
CH		 118 case KVM_S390_MCHK:
119 if (psw_mchk_disabled(vcpu))
120 return 0;
121 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
122 return 1;
123 return 0;
d8346b7d
CH		 124 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
125 if (psw_ioint_disabled(vcpu))
126 return 0;
79fd50c6
CH		 127 if (vcpu->arch.sie_block->gcr[6] &
128 int_word_to_isc_bits(inti->io.io_int_word))
d8346b7d
CH		 129 return 1;
130 return 0;
ba5c1e9b 131 default:
d8346b7d
CH		 132 printk(KERN_WARNING "illegal interrupt type %llx\n",
133 inti->type);
ba5c1e9b
CO		 134 BUG();
135 }
136 return 0;
137}
138
139static void __set_cpu_idle(struct kvm_vcpu *vcpu)
140{
ba5c1e9b
CO		 141 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
142 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
143}
144
145static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
146{
ba5c1e9b
CO		 147 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
148 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
149}
150
151static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
152{
4953919f
DH		 153 atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
154 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 155 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 156 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
157
158 if (guestdbg_enabled(vcpu)) {
159 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
160 LCTL_CR10 | LCTL_CR11);
161 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
162 }
db373861
DH		 163
164 if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP)
165 atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 166}
167
168static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
169{
170 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
171}
172
173static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
180c12fb 174 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 175{
176 switch (inti->type) {
7697e71f 177 case KVM_S390_INT_EXTERNAL_CALL:
ba5c1e9b
CO		 178 case KVM_S390_INT_EMERGENCY:
179 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 180 case KVM_S390_INT_PFAULT_INIT:
181 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b 182 case KVM_S390_INT_VIRTIO:
e029ae5b
TH		 183 case KVM_S390_INT_CLOCK_COMP:
184 case KVM_S390_INT_CPU_TIMER:
ba5c1e9b
CO		 185 if (psw_extint_disabled(vcpu))
186 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
187 else
188 vcpu->arch.sie_block->lctl |= LCTL_CR0;
189 break;
190 case KVM_S390_SIGP_STOP:
191 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
192 break;
48a3e950
CH		 193 case KVM_S390_MCHK:
194 if (psw_mchk_disabled(vcpu))
195 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
196 else
197 vcpu->arch.sie_block->lctl |= LCTL_CR14;
198 break;
d8346b7d
CH		 199 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
200 if (psw_ioint_disabled(vcpu))
201 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
202 else
203 vcpu->arch.sie_block->lctl |= LCTL_CR6;
204 break;
ba5c1e9b
CO		 205 default:
206 BUG();
207 }
208}
209
8a2ef71b
JF		 210static u16 get_ilc(struct kvm_vcpu *vcpu)
211{
212 const unsigned short table[] = { 2, 4, 4, 6 };
213
214 switch (vcpu->arch.sie_block->icptcode) {
215 case ICPT_INST:
216 case ICPT_INSTPROGI:
217 case ICPT_OPEREXC:
218 case ICPT_PARTEXEC:
219 case ICPT_IOINST:
220 /* last instruction only stored for these icptcodes */
221 return table[vcpu->arch.sie_block->ipa >> 14];
222 case ICPT_PROGI:
223 return vcpu->arch.sie_block->pgmilc;
224 default:
225 return 0;
226 }
227}
228
614aeab4 229static int __must_check __deliver_prog_irq(struct kvm_vcpu *vcpu,
8712836b
DH		 230 struct kvm_s390_pgm_info *pgm_info)
231{
8712836b 232 int rc = 0;
8a2ef71b 233 u16 ilc = get_ilc(vcpu);
8712836b
DH		 234
235 switch (pgm_info->code & ~PGM_PER) {
236 case PGM_AFX_TRANSLATION:
237 case PGM_ASX_TRANSLATION:
238 case PGM_EX_TRANSLATION:
239 case PGM_LFX_TRANSLATION:
240 case PGM_LSTE_SEQUENCE:
241 case PGM_LSX_TRANSLATION:
242 case PGM_LX_TRANSLATION:
243 case PGM_PRIMARY_AUTHORITY:
244 case PGM_SECONDARY_AUTHORITY:
245 case PGM_SPACE_SWITCH:
246 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
247 (u64 *)__LC_TRANS_EXC_CODE);
248 break;
249 case PGM_ALEN_TRANSLATION:
250 case PGM_ALE_SEQUENCE:
251 case PGM_ASTE_INSTANCE:
252 case PGM_ASTE_SEQUENCE:
253 case PGM_ASTE_VALIDITY:
254 case PGM_EXTENDED_AUTHORITY:
255 rc = put_guest_lc(vcpu, pgm_info->exc_access_id,
256 (u8 *)__LC_EXC_ACCESS_ID);
257 break;
258 case PGM_ASCE_TYPE:
259 case PGM_PAGE_TRANSLATION:
260 case PGM_REGION_FIRST_TRANS:
261 case PGM_REGION_SECOND_TRANS:
262 case PGM_REGION_THIRD_TRANS:
263 case PGM_SEGMENT_TRANSLATION:
264 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
265 (u64 *)__LC_TRANS_EXC_CODE);
266 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
267 (u8 *)__LC_EXC_ACCESS_ID);
268 rc |= put_guest_lc(vcpu, pgm_info->op_access_id,
269 (u8 *)__LC_OP_ACCESS_ID);
270 break;
271 case PGM_MONITOR:
272 rc = put_guest_lc(vcpu, pgm_info->mon_class_nr,
273 (u64 *)__LC_MON_CLASS_NR);
274 rc |= put_guest_lc(vcpu, pgm_info->mon_code,
275 (u64 *)__LC_MON_CODE);
276 break;
277 case PGM_DATA:
278 rc = put_guest_lc(vcpu, pgm_info->data_exc_code,
279 (u32 *)__LC_DATA_EXC_CODE);
280 break;
281 case PGM_PROTECTION:
282 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
283 (u64 *)__LC_TRANS_EXC_CODE);
284 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
285 (u8 *)__LC_EXC_ACCESS_ID);
286 break;
287 }
288
289 if (pgm_info->code & PGM_PER) {
290 rc |= put_guest_lc(vcpu, pgm_info->per_code,
291 (u8 *) __LC_PER_CODE);
292 rc |= put_guest_lc(vcpu, pgm_info->per_atmid,
293 (u8 *)__LC_PER_ATMID);
294 rc |= put_guest_lc(vcpu, pgm_info->per_address,
295 (u64 *) __LC_PER_ADDRESS);
296 rc |= put_guest_lc(vcpu, pgm_info->per_access_id,
297 (u8 *) __LC_PER_ACCESS_ID);
298 }
299
8a2ef71b 300 rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
8712836b
DH		 301 rc |= put_guest_lc(vcpu, pgm_info->code,
302 (u16 *)__LC_PGM_INT_CODE);
303 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
304 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
305 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
306 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
307
308 return rc;
309}
310
614aeab4 311static int __must_check __do_deliver_interrupt(struct kvm_vcpu *vcpu,
180c12fb 312 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 313{
314 const unsigned short table[] = { 2, 4, 4, 6 };
dc5008b9 315 int rc = 0;
ba5c1e9b
CO		 316
317 switch (inti->type) {
318 case KVM_S390_INT_EMERGENCY:
319 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
320 vcpu->stat.deliver_emergency_signal++;
ade38c31
CH		 321 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
322 inti->emerg.code, 0);
1a03b764
JF		 323 rc = put_guest_lc(vcpu, 0x1201, (u16 *)__LC_EXT_INT_CODE);
324 rc |= put_guest_lc(vcpu, inti->emerg.code,
325 (u16 *)__LC_EXT_CPU_ADDR);
326 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
327 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
328 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 329 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ba5c1e9b 330 break;
7697e71f
CE		 331 case KVM_S390_INT_EXTERNAL_CALL:
332 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
333 vcpu->stat.deliver_external_call++;
ade38c31
CH		 334 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
335 inti->extcall.code, 0);
1a03b764
JF		 336 rc = put_guest_lc(vcpu, 0x1202, (u16 *)__LC_EXT_INT_CODE);
337 rc |= put_guest_lc(vcpu, inti->extcall.code,
338 (u16 *)__LC_EXT_CPU_ADDR);
339 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
340 &vcpu->arch.sie_block->gpsw,
341 sizeof(psw_t));
342 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
343 &vcpu->arch.sie_block->gpsw,
344 sizeof(psw_t));
7697e71f 345 break;
e029ae5b
TH		 346 case KVM_S390_INT_CLOCK_COMP:
347 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
348 inti->ext.ext_params, 0);
79395031 349 rc = deliver_ckc_interrupt(vcpu);
e029ae5b
TH		 350 break;
351 case KVM_S390_INT_CPU_TIMER:
352 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
353 inti->ext.ext_params, 0);
354 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
355 (u16 *)__LC_EXT_INT_CODE);
356 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
357 &vcpu->arch.sie_block->gpsw,
358 sizeof(psw_t));
359 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
360 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
361 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
362 (u32 *)__LC_EXT_PARAMS);
363 break;
ba5c1e9b
CO		 364 case KVM_S390_INT_SERVICE:
365 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
366 inti->ext.ext_params);
367 vcpu->stat.deliver_service_signal++;
ade38c31
CH		 368 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
369 inti->ext.ext_params, 0);
7988276d
HC		 370 rc = put_guest_lc(vcpu, 0x2401, (u16 *)__LC_EXT_INT_CODE);
371 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
372 &vcpu->arch.sie_block->gpsw,
373 sizeof(psw_t));
374 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 375 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
7988276d
HC		 376 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
377 (u32 *)__LC_EXT_PARAMS);
ba5c1e9b 378 break;
3c038e6b
DD		 379 case KVM_S390_INT_PFAULT_INIT:
380 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
381 inti->ext.ext_params2);
44c6ca3d
JF		 382 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
383 (u16 *) __LC_EXT_INT_CODE);
384 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
1a03b764
JF		 385 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
386 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
387 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
3c038e6b 388 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
1a03b764
JF		 389 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
390 (u64 *) __LC_EXT_PARAMS2);
3c038e6b
DD		 391 break;
392 case KVM_S390_INT_PFAULT_DONE:
393 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
394 inti->ext.ext_params2);
7988276d
HC		 395 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
396 rc |= put_guest_lc(vcpu, 0x0680, (u16 *)__LC_EXT_CPU_ADDR);
397 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
398 &vcpu->arch.sie_block->gpsw,
399 sizeof(psw_t));
400 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
3c038e6b 401 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
7988276d
HC		 402 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
403 (u64 *)__LC_EXT_PARAMS2);
3c038e6b 404 break;
ba5c1e9b 405 case KVM_S390_INT_VIRTIO:
33e19115 406 VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
ba5c1e9b
CO		 407 inti->ext.ext_params, inti->ext.ext_params2);
408 vcpu->stat.deliver_virtio_interrupt++;
ade38c31
CH		 409 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
410 inti->ext.ext_params,
411 inti->ext.ext_params2);
7988276d
HC		 412 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
413 rc |= put_guest_lc(vcpu, 0x0d00, (u16 *)__LC_EXT_CPU_ADDR);
414 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
415 &vcpu->arch.sie_block->gpsw,
416 sizeof(psw_t));
417 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 418 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
7988276d
HC		 419 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
420 (u32 *)__LC_EXT_PARAMS);
421 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
422 (u64 *)__LC_EXT_PARAMS2);
ba5c1e9b 423 break;
ba5c1e9b
CO		 424 case KVM_S390_SIGP_STOP:
425 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop");
426 vcpu->stat.deliver_stop_signal++;
ade38c31
CH		 427 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
428 0, 0);
ba5c1e9b
CO		 429 __set_intercept_indicator(vcpu, inti);
430 break;
431
432 case KVM_S390_SIGP_SET_PREFIX:
433 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x",
434 inti->prefix.address);
435 vcpu->stat.deliver_prefix_signal++;
ade38c31
CH		 436 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
437 inti->prefix.address, 0);
8d26cf7b 438 kvm_s390_set_prefix(vcpu, inti->prefix.address);
ba5c1e9b
CO		 439 break;
440
441 case KVM_S390_RESTART:
442 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
443 vcpu->stat.deliver_restart_signal++;
ade38c31
CH		 444 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
445 0, 0);
1a03b764
JF		 446 rc = write_guest_lc(vcpu,
447 offsetof(struct _lowcore, restart_old_psw),
448 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
449 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
450 &vcpu->arch.sie_block->gpsw,
451 sizeof(psw_t));
ba5c1e9b 452 break;
ba5c1e9b
CO		 453 case KVM_S390_PROGRAM_INT:
454 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
455 inti->pgm.code,
456 table[vcpu->arch.sie_block->ipa >> 14]);
457 vcpu->stat.deliver_program_int++;
ade38c31
CH		 458 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
459 inti->pgm.code, 0);
8712836b 460 rc = __deliver_prog_irq(vcpu, &inti->pgm);
ba5c1e9b
CO		 461 break;
462
48a3e950
CH		 463 case KVM_S390_MCHK:
464 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
465 inti->mchk.mcic);
466 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
467 inti->mchk.cr14,
468 inti->mchk.mcic);
dc5008b9
HC		 469 rc = kvm_s390_vcpu_store_status(vcpu,
470 KVM_S390_STORE_STATUS_PREFIXED);
7988276d
HC		 471 rc |= put_guest_lc(vcpu, inti->mchk.mcic, (u64 *)__LC_MCCK_CODE);
472 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
473 &vcpu->arch.sie_block->gpsw,
474 sizeof(psw_t));
475 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
dc5008b9 476 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
48a3e950
CH		 477 break;
478
d8346b7d
CH		 479 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
480 {
481 __u32 param0 = ((__u32)inti->io.subchannel_id << 16) |
482 inti->io.subchannel_nr;
483 __u64 param1 = ((__u64)inti->io.io_int_parm << 32) |
484 inti->io.io_int_word;
485 VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
486 vcpu->stat.deliver_io_int++;
487 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
488 param0, param1);
7988276d
HC		 489 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
490 (u16 *)__LC_SUBCHANNEL_ID);
491 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
492 (u16 *)__LC_SUBCHANNEL_NR);
493 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
494 (u32 *)__LC_IO_INT_PARM);
495 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
496 (u32 *)__LC_IO_INT_WORD);
497 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
498 &vcpu->arch.sie_block->gpsw,
499 sizeof(psw_t));
500 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
501 &vcpu->arch.sie_block->gpsw,
502 sizeof(psw_t));
d8346b7d
CH		 503 break;
504 }
ba5c1e9b
CO		 505 default:
506 BUG();
507 }
79395031
JF		 508
509 return rc;
ba5c1e9b
CO		 510}
511
614aeab4 512static int __must_check deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
ba5c1e9b 513{
dc5008b9 514 int rc;
ba5c1e9b 515
1a03b764
JF		 516 rc = put_guest_lc(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE);
517 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
518 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
519 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
520 &vcpu->arch.sie_block->gpsw,
521 sizeof(psw_t));
79395031 522 return rc;
ba5c1e9b
CO		 523}
524
4953919f
DH		 525/* Check whether SIGP interpretation facility has an external call pending */
526int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu)
527{
528 atomic_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl;
529
530 if (!psw_extint_disabled(vcpu) &&
531 (vcpu->arch.sie_block->gcr[0] & 0x2000ul) &&
532 (atomic_read(sigp_ctrl) & SIGP_CTRL_C) &&
533 (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND))
534 return 1;
535
536 return 0;
537}
538
3c038e6b 539int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
ba5c1e9b 540{
180c12fb
CB		 541 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
542 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
543 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 544 int rc = 0;
545
546 if (atomic_read(&li->active)) {
4ae3c081 547 spin_lock(&li->lock);
ba5c1e9b
CO		 548 list_for_each_entry(inti, &li->list, list)
549 if (__interrupt_is_deliverable(vcpu, inti)) {
550 rc = 1;
551 break;
552 }
4ae3c081 553 spin_unlock(&li->lock);
ba5c1e9b
CO		 554 }
555
556 if ((!rc) && atomic_read(&fi->active)) {
b037a4f3 557 spin_lock(&fi->lock);
ba5c1e9b
CO		 558 list_for_each_entry(inti, &fi->list, list)
559 if (__interrupt_is_deliverable(vcpu, inti)) {
560 rc = 1;
561 break;
562 }
b037a4f3 563 spin_unlock(&fi->lock);
ba5c1e9b
CO		 564 }
565
bb78c5ec
DH		 566 if (!rc && kvm_cpu_has_pending_timer(vcpu))
567 rc = 1;
ba5c1e9b 568
4953919f
DH		 569 if (!rc && kvm_s390_si_ext_call_pending(vcpu))
570 rc = 1;
571
ba5c1e9b
CO		 572 return rc;
573}
574
3d80840d
MT		 575int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
576{
bb78c5ec
DH		 577 if (!(vcpu->arch.sie_block->ckc <
578 get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
579 return 0;
580 if (!ckc_interrupts_enabled(vcpu))
581 return 0;
582 return 1;
3d80840d
MT		 583}
584
ba5c1e9b
CO		 585int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
586{
587 u64 now, sltime;
ba5c1e9b
CO		 588
589 vcpu->stat.exit_wait_state++;
ba5c1e9b 590
0759d068
DH		 591 /* fast path */
592 if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu))
593 return 0;
e52b2af5 594
ba5c1e9b
CO		 595 if (psw_interrupts_disabled(vcpu)) {
596 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 597 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 598 }
599
0759d068 600 __set_cpu_idle(vcpu);
bb78c5ec 601 if (!ckc_interrupts_enabled(vcpu)) {
ba5c1e9b
CO		 602 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
603 goto no_timer;
604 }
605
8c071b0f 606 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
ed4f2094 607 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
ca872302
CB		 608 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
609 VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
ba5c1e9b 610no_timer:
800c1065 611 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 612 kvm_vcpu_block(vcpu);
ba5c1e9b 613 __unset_cpu_idle(vcpu);
800c1065
TH		 614 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
615
ca872302 616 hrtimer_try_to_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 617 return 0;
618}
619
0e9c85a5
DH		 620void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
621{
622 if (waitqueue_active(&vcpu->wq)) {
623 /*
624 * The vcpu gave up the cpu voluntarily, mark it as a good
625 * yield-candidate.
626 */
627 vcpu->preempted = true;
628 wake_up_interruptible(&vcpu->wq);
ce2e4f0b 629 vcpu->stat.halt_wakeup++;
0e9c85a5
DH		 630 }
631}
632
ca872302
CB		 633enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
634{
635 struct kvm_vcpu *vcpu;
636
637 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
ea74c0ea 638 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 639
640 return HRTIMER_NORESTART;
641}
ba5c1e9b 642
2ed10cc1
JF		 643void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
644{
645 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
646 struct kvm_s390_interrupt_info *n, *inti = NULL;
647
4ae3c081 648 spin_lock(&li->lock);
2ed10cc1
JF		 649 list_for_each_entry_safe(inti, n, &li->list, list) {
650 list_del(&inti->list);
651 kfree(inti);
652 }
653 atomic_set(&li->active, 0);
4ae3c081 654 spin_unlock(&li->lock);
4953919f
DH		 655
656 /* clear pending external calls set by sigp interpretation facility */
657 atomic_clear_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
658 atomic_clear_mask(SIGP_CTRL_C,
659 &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl);
2ed10cc1
JF		 660}
661
614aeab4 662int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 663{
180c12fb
CB		 664 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
665 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
666 struct kvm_s390_interrupt_info *n, *inti = NULL;
ba5c1e9b 667 int deliver;
79395031 668 int rc = 0;
ba5c1e9b
CO		 669
670 __reset_intercept_indicators(vcpu);
671 if (atomic_read(&li->active)) {
672 do {
673 deliver = 0;
4ae3c081 674 spin_lock(&li->lock);
ba5c1e9b
CO		 675 list_for_each_entry_safe(inti, n, &li->list, list) {
676 if (__interrupt_is_deliverable(vcpu, inti)) {
677 list_del(&inti->list);
678 deliver = 1;
679 break;
680 }
681 __set_intercept_indicator(vcpu, inti);
682 }
683 if (list_empty(&li->list))
684 atomic_set(&li->active, 0);
4ae3c081 685 spin_unlock(&li->lock);
ba5c1e9b 686 if (deliver) {
79395031 687 rc = __do_deliver_interrupt(vcpu, inti);
ba5c1e9b
CO		 688 kfree(inti);
689 }
79395031 690 } while (!rc && deliver);
ba5c1e9b
CO		 691 }
692
79395031
JF		 693 if (!rc && kvm_cpu_has_pending_timer(vcpu))
694 rc = deliver_ckc_interrupt(vcpu);
ba5c1e9b 695
79395031 696 if (!rc && atomic_read(&fi->active)) {
ba5c1e9b
CO		 697 do {
698 deliver = 0;
b037a4f3 699 spin_lock(&fi->lock);
ba5c1e9b
CO		 700 list_for_each_entry_safe(inti, n, &fi->list, list) {
701 if (__interrupt_is_deliverable(vcpu, inti)) {
702 list_del(&inti->list);
a91b8ebe 703 fi->irq_count--;
ba5c1e9b
CO		 704 deliver = 1;
705 break;
706 }
707 __set_intercept_indicator(vcpu, inti);
708 }
709 if (list_empty(&fi->list))
710 atomic_set(&fi->active, 0);
b037a4f3 711 spin_unlock(&fi->lock);
ba5c1e9b 712 if (deliver) {
79395031 713 rc = __do_deliver_interrupt(vcpu, inti);
ba5c1e9b
CO		 714 kfree(inti);
715 }
79395031 716 } while (!rc && deliver);
ba5c1e9b 717 }
79395031
JF		 718
719 return rc;
ba5c1e9b
CO		 720}
721
722int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
723{
180c12fb
CB		 724 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
725 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 726
727 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
728 if (!inti)
729 return -ENOMEM;
730
a419aef8 731 inti->type = KVM_S390_PROGRAM_INT;
ba5c1e9b
CO		 732 inti->pgm.code = code;
733
734 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
ade38c31 735 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, inti->type, code, 0, 1);
4ae3c081 736 spin_lock(&li->lock);
ba5c1e9b
CO		 737 list_add(&inti->list, &li->list);
738 atomic_set(&li->active, 1);
d0321a24 739 BUG_ON(waitqueue_active(li->wq));
4ae3c081 740 spin_unlock(&li->lock);
bcd84683
JF		 741 return 0;
742}
743
744int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
745 struct kvm_s390_pgm_info *pgm_info)
746{
747 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
748 struct kvm_s390_interrupt_info *inti;
749
750 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
751 if (!inti)
752 return -ENOMEM;
753
754 VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
755 pgm_info->code);
756 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
757 pgm_info->code, 0, 1);
758
759 inti->type = KVM_S390_PROGRAM_INT;
760 memcpy(&inti->pgm, pgm_info, sizeof(inti->pgm));
4ae3c081 761 spin_lock(&li->lock);
bcd84683
JF		 762 list_add(&inti->list, &li->list);
763 atomic_set(&li->active, 1);
764 BUG_ON(waitqueue_active(li->wq));
4ae3c081 765 spin_unlock(&li->lock);
ba5c1e9b
CO		 766 return 0;
767}
768
fa6b7fe9
CH		 769struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
770 u64 cr6, u64 schid)
771{
772 struct kvm_s390_float_interrupt *fi;
773 struct kvm_s390_interrupt_info *inti, *iter;
774
775 if ((!schid && !cr6) || (schid && cr6))
776 return NULL;
777 mutex_lock(&kvm->lock);
778 fi = &kvm->arch.float_int;
779 spin_lock(&fi->lock);
780 inti = NULL;
781 list_for_each_entry(iter, &fi->list, list) {
782 if (!is_ioint(iter->type))
783 continue;
79fd50c6
CH		 784 if (cr6 &&
785 ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
fa6b7fe9
CH		 786 continue;
787 if (schid) {
788 if (((schid & 0x00000000ffff0000) >> 16) !=
789 iter->io.subchannel_id)
790 continue;
791 if ((schid & 0x000000000000ffff) !=
792 iter->io.subchannel_nr)
793 continue;
794 }
795 inti = iter;
796 break;
797 }
a91b8ebe 798 if (inti) {
fa6b7fe9 799 list_del_init(&inti->list);
a91b8ebe
JF		 800 fi->irq_count--;
801 }
fa6b7fe9
CH		 802 if (list_empty(&fi->list))
803 atomic_set(&fi->active, 0);
804 spin_unlock(&fi->lock);
805 mutex_unlock(&kvm->lock);
806 return inti;
807}
ba5c1e9b 808
a91b8ebe 809static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
ba5c1e9b 810{
180c12fb
CB		 811 struct kvm_s390_local_interrupt *li;
812 struct kvm_s390_float_interrupt *fi;
c05c4186 813 struct kvm_s390_interrupt_info *iter;
1ee0bc55 814 struct kvm_vcpu *dst_vcpu = NULL;
ba5c1e9b 815 int sigcpu;
a91b8ebe 816 int rc = 0;
ba5c1e9b 817
c05c4186
JF		 818 mutex_lock(&kvm->lock);
819 fi = &kvm->arch.float_int;
820 spin_lock(&fi->lock);
a91b8ebe
JF		 821 if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
822 rc = -EINVAL;
823 goto unlock_fi;
824 }
825 fi->irq_count++;
c05c4186
JF		 826 if (!is_ioint(inti->type)) {
827 list_add_tail(&inti->list, &fi->list);
828 } else {
829 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
830
831 /* Keep I/O interrupts sorted in isc order. */
832 list_for_each_entry(iter, &fi->list, list) {
833 if (!is_ioint(iter->type))
834 continue;
835 if (int_word_to_isc_bits(iter->io.io_int_word)
836 <= isc_bits)
837 continue;
838 break;
839 }
840 list_add_tail(&inti->list, &iter->list);
841 }
842 atomic_set(&fi->active, 1);
843 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
844 if (sigcpu == KVM_MAX_VCPUS) {
845 do {
846 sigcpu = fi->next_rr_cpu++;
847 if (sigcpu == KVM_MAX_VCPUS)
848 sigcpu = fi->next_rr_cpu = 0;
1ee0bc55 849 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
c05c4186 850 }
1ee0bc55
JF		 851 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
852 li = &dst_vcpu->arch.local_int;
4ae3c081 853 spin_lock(&li->lock);
c05c4186 854 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
4ae3c081 855 spin_unlock(&li->lock);
0e9c85a5 856 kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
a91b8ebe 857unlock_fi:
c05c4186
JF		 858 spin_unlock(&fi->lock);
859 mutex_unlock(&kvm->lock);
a91b8ebe 860 return rc;
c05c4186
JF		 861}
862
863int kvm_s390_inject_vm(struct kvm *kvm,
864 struct kvm_s390_interrupt *s390int)
865{
866 struct kvm_s390_interrupt_info *inti;
867
ba5c1e9b
CO		 868 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
869 if (!inti)
870 return -ENOMEM;
871
c05c4186
JF		 872 inti->type = s390int->type;
873 switch (inti->type) {
ba5c1e9b 874 case KVM_S390_INT_VIRTIO:
33e19115 875 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 876 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 877 inti->ext.ext_params = s390int->parm;
878 inti->ext.ext_params2 = s390int->parm64;
879 break;
880 case KVM_S390_INT_SERVICE:
881 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 882 inti->ext.ext_params = s390int->parm;
883 break;
3c038e6b
DD		 884 case KVM_S390_INT_PFAULT_DONE:
885 inti->type = s390int->type;
886 inti->ext.ext_params2 = s390int->parm64;
887 break;
48a3e950
CH		 888 case KVM_S390_MCHK:
889 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
890 s390int->parm64);
48a3e950
CH		 891 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
892 inti->mchk.mcic = s390int->parm64;
893 break;
d8346b7d 894 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
c05c4186 895 if (inti->type & IOINT_AI_MASK)
d8346b7d
CH		 896 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
897 else
898 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
899 s390int->type & IOINT_CSSID_MASK,
900 s390int->type & IOINT_SSID_MASK,
901 s390int->type & IOINT_SCHID_MASK);
d8346b7d
CH		 902 inti->io.subchannel_id = s390int->parm >> 16;
903 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
904 inti->io.io_int_parm = s390int->parm64 >> 32;
905 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
906 break;
ba5c1e9b
CO		 907 default:
908 kfree(inti);
909 return -EINVAL;
910 }
ade38c31
CH		 911 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
912 2);
ba5c1e9b 913
a91b8ebe 914 return __inject_vm(kvm, inti);
ba5c1e9b
CO		 915}
916
2f32d4ea
CH		 917void kvm_s390_reinject_io_int(struct kvm *kvm,
918 struct kvm_s390_interrupt_info *inti)
919{
920 __inject_vm(kvm, inti);
921}
922
ba5c1e9b
CO		 923int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
924 struct kvm_s390_interrupt *s390int)
925{
180c12fb
CB		 926 struct kvm_s390_local_interrupt *li;
927 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 928
929 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
930 if (!inti)
931 return -ENOMEM;
932
933 switch (s390int->type) {
934 case KVM_S390_PROGRAM_INT:
935 if (s390int->parm & 0xffff0000) {
936 kfree(inti);
937 return -EINVAL;
938 }
939 inti->type = s390int->type;
940 inti->pgm.code = s390int->parm;
941 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
942 s390int->parm);
943 break;
b7e6e4d3
CB		 944 case KVM_S390_SIGP_SET_PREFIX:
945 inti->prefix.address = s390int->parm;
946 inti->type = s390int->type;
947 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
948 s390int->parm);
949 break;
ba5c1e9b
CO		 950 case KVM_S390_SIGP_STOP:
951 case KVM_S390_RESTART:
e029ae5b
TH		 952 case KVM_S390_INT_CLOCK_COMP:
953 case KVM_S390_INT_CPU_TIMER:
82a12737
JH		 954 VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
955 inti->type = s390int->type;
956 break;
7697e71f 957 case KVM_S390_INT_EXTERNAL_CALL:
82a12737
JH		 958 if (s390int->parm & 0xffff0000) {
959 kfree(inti);
960 return -EINVAL;
961 }
962 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
963 s390int->parm);
964 inti->type = s390int->type;
965 inti->extcall.code = s390int->parm;
966 break;
ba5c1e9b 967 case KVM_S390_INT_EMERGENCY:
82a12737
JH		 968 if (s390int->parm & 0xffff0000) {
969 kfree(inti);
970 return -EINVAL;
971 }
972 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm);
ba5c1e9b 973 inti->type = s390int->type;
82a12737 974 inti->emerg.code = s390int->parm;
ba5c1e9b 975 break;
48a3e950
CH		 976 case KVM_S390_MCHK:
977 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
978 s390int->parm64);
979 inti->type = s390int->type;
980 inti->mchk.mcic = s390int->parm64;
981 break;
3c038e6b
DD		 982 case KVM_S390_INT_PFAULT_INIT:
983 inti->type = s390int->type;
984 inti->ext.ext_params2 = s390int->parm64;
985 break;
ba5c1e9b
CO		 986 case KVM_S390_INT_VIRTIO:
987 case KVM_S390_INT_SERVICE:
d8346b7d 988 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b
CO		 989 default:
990 kfree(inti);
991 return -EINVAL;
992 }
ade38c31
CH		 993 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm,
994 s390int->parm64, 2);
ba5c1e9b 995
ba5c1e9b 996 li = &vcpu->arch.local_int;
4ae3c081 997 spin_lock(&li->lock);
ba5c1e9b
CO		 998 if (inti->type == KVM_S390_PROGRAM_INT)
999 list_add(&inti->list, &li->list);
1000 else
1001 list_add_tail(&inti->list, &li->list);
1002 atomic_set(&li->active, 1);
1003 if (inti->type == KVM_S390_SIGP_STOP)
1004 li->action_bits |= ACTION_STOP_ON_STOP;
1005 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
4ae3c081 1006 spin_unlock(&li->lock);
0e9c85a5 1007 kvm_s390_vcpu_wakeup(vcpu);
ba5c1e9b
CO		 1008 return 0;
1009}
c05c4186 1010
67335e63 1011void kvm_s390_clear_float_irqs(struct kvm *kvm)
c05c4186
JF		 1012{
1013 struct kvm_s390_float_interrupt *fi;
1014 struct kvm_s390_interrupt_info *n, *inti = NULL;
1015
1016 mutex_lock(&kvm->lock);
1017 fi = &kvm->arch.float_int;
1018 spin_lock(&fi->lock);
1019 list_for_each_entry_safe(inti, n, &fi->list, list) {
1020 list_del(&inti->list);
1021 kfree(inti);
1022 }
a91b8ebe 1023 fi->irq_count = 0;
c05c4186
JF		 1024 atomic_set(&fi->active, 0);
1025 spin_unlock(&fi->lock);
1026 mutex_unlock(&kvm->lock);
1027}
1028
1029static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti,
1030 u8 *addr)
1031{
1032 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1033 struct kvm_s390_irq irq = {0};
1034
1035 irq.type = inti->type;
1036 switch (inti->type) {
3c038e6b
DD		 1037 case KVM_S390_INT_PFAULT_INIT:
1038 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1039 case KVM_S390_INT_VIRTIO:
1040 case KVM_S390_INT_SERVICE:
1041 irq.u.ext = inti->ext;
1042 break;
1043 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1044 irq.u.io = inti->io;
1045 break;
1046 case KVM_S390_MCHK:
1047 irq.u.mchk = inti->mchk;
1048 break;
1049 default:
1050 return -EINVAL;
1051 }
1052
1053 if (copy_to_user(uptr, &irq, sizeof(irq)))
1054 return -EFAULT;
1055
1056 return 0;
1057}
1058
1059static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len)
1060{
1061 struct kvm_s390_interrupt_info *inti;
1062 struct kvm_s390_float_interrupt *fi;
1063 int ret = 0;
1064 int n = 0;
1065
1066 mutex_lock(&kvm->lock);
1067 fi = &kvm->arch.float_int;
1068 spin_lock(&fi->lock);
1069
1070 list_for_each_entry(inti, &fi->list, list) {
1071 if (len < sizeof(struct kvm_s390_irq)) {
1072 /* signal userspace to try again */
1073 ret = -ENOMEM;
1074 break;
1075 }
1076 ret = copy_irq_to_user(inti, buf);
1077 if (ret)
1078 break;
1079 buf += sizeof(struct kvm_s390_irq);
1080 len -= sizeof(struct kvm_s390_irq);
1081 n++;
1082 }
1083
1084 spin_unlock(&fi->lock);
1085 mutex_unlock(&kvm->lock);
1086
1087 return ret < 0 ? ret : n;
1088}
1089
1090static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1091{
1092 int r;
1093
1094 switch (attr->group) {
1095 case KVM_DEV_FLIC_GET_ALL_IRQS:
1096 r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr,
1097 attr->attr);
1098 break;
1099 default:
1100 r = -EINVAL;
1101 }
1102
1103 return r;
1104}
1105
1106static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1107 u64 addr)
1108{
1109 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1110 void *target = NULL;
1111 void __user *source;
1112 u64 size;
1113
1114 if (get_user(inti->type, (u64 __user *)addr))
1115 return -EFAULT;
1116
1117 switch (inti->type) {
3c038e6b
DD		 1118 case KVM_S390_INT_PFAULT_INIT:
1119 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1120 case KVM_S390_INT_VIRTIO:
1121 case KVM_S390_INT_SERVICE:
1122 target = (void *) &inti->ext;
1123 source = &uptr->u.ext;
1124 size = sizeof(inti->ext);
1125 break;
1126 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1127 target = (void *) &inti->io;
1128 source = &uptr->u.io;
1129 size = sizeof(inti->io);
1130 break;
1131 case KVM_S390_MCHK:
1132 target = (void *) &inti->mchk;
1133 source = &uptr->u.mchk;
1134 size = sizeof(inti->mchk);
1135 break;
1136 default:
1137 return -EINVAL;
1138 }
1139
1140 if (copy_from_user(target, source, size))
1141 return -EFAULT;
1142
1143 return 0;
1144}
1145
1146static int enqueue_floating_irq(struct kvm_device *dev,
1147 struct kvm_device_attr *attr)
1148{
1149 struct kvm_s390_interrupt_info *inti = NULL;
1150 int r = 0;
1151 int len = attr->attr;
1152
1153 if (len % sizeof(struct kvm_s390_irq) != 0)
1154 return -EINVAL;
1155 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1156 return -EINVAL;
1157
1158 while (len >= sizeof(struct kvm_s390_irq)) {
1159 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1160 if (!inti)
1161 return -ENOMEM;
1162
1163 r = copy_irq_from_user(inti, attr->addr);
1164 if (r) {
1165 kfree(inti);
1166 return r;
1167 }
a91b8ebe
JF		 1168 r = __inject_vm(dev->kvm, inti);
1169 if (r) {
1170 kfree(inti);
1171 return r;
1172 }
c05c4186
JF		 1173 len -= sizeof(struct kvm_s390_irq);
1174 attr->addr += sizeof(struct kvm_s390_irq);
1175 }
1176
1177 return r;
1178}
1179
841b91c5
CH		 1180static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1181{
1182 if (id >= MAX_S390_IO_ADAPTERS)
1183 return NULL;
1184 return kvm->arch.adapters[id];
1185}
1186
1187static int register_io_adapter(struct kvm_device *dev,
1188 struct kvm_device_attr *attr)
1189{
1190 struct s390_io_adapter *adapter;
1191 struct kvm_s390_io_adapter adapter_info;
1192
1193 if (copy_from_user(&adapter_info,
1194 (void __user *)attr->addr, sizeof(adapter_info)))
1195 return -EFAULT;
1196
1197 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1198 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1199 return -EINVAL;
1200
1201 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1202 if (!adapter)
1203 return -ENOMEM;
1204
1205 INIT_LIST_HEAD(&adapter->maps);
1206 init_rwsem(&adapter->maps_lock);
1207 atomic_set(&adapter->nr_maps, 0);
1208 adapter->id = adapter_info.id;
1209 adapter->isc = adapter_info.isc;
1210 adapter->maskable = adapter_info.maskable;
1211 adapter->masked = false;
1212 adapter->swap = adapter_info.swap;
1213 dev->kvm->arch.adapters[adapter->id] = adapter;
1214
1215 return 0;
1216}
1217
1218int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1219{
1220 int ret;
1221 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1222
1223 if (!adapter || !adapter->maskable)
1224 return -EINVAL;
1225 ret = adapter->masked;
1226 adapter->masked = masked;
1227 return ret;
1228}
1229
1230static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1231{
1232 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1233 struct s390_map_info *map;
1234 int ret;
1235
1236 if (!adapter || !addr)
1237 return -EINVAL;
1238
1239 map = kzalloc(sizeof(*map), GFP_KERNEL);
1240 if (!map) {
1241 ret = -ENOMEM;
1242 goto out;
1243 }
1244 INIT_LIST_HEAD(&map->list);
1245 map->guest_addr = addr;
6e0a0431 1246 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 1247 if (map->addr == -EFAULT) {
1248 ret = -EFAULT;
1249 goto out;
1250 }
1251 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1252 if (ret < 0)
1253 goto out;
1254 BUG_ON(ret != 1);
1255 down_write(&adapter->maps_lock);
1256 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1257 list_add_tail(&map->list, &adapter->maps);
1258 ret = 0;
1259 } else {
1260 put_page(map->page);
1261 ret = -EINVAL;
1262 }
1263 up_write(&adapter->maps_lock);
1264out:
1265 if (ret)
1266 kfree(map);
1267 return ret;
1268}
1269
1270static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1271{
1272 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1273 struct s390_map_info *map, *tmp;
1274 int found = 0;
1275
1276 if (!adapter || !addr)
1277 return -EINVAL;
1278
1279 down_write(&adapter->maps_lock);
1280 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1281 if (map->guest_addr == addr) {
1282 found = 1;
1283 atomic_dec(&adapter->nr_maps);
1284 list_del(&map->list);
1285 put_page(map->page);
1286 kfree(map);
1287 break;
1288 }
1289 }
1290 up_write(&adapter->maps_lock);
1291
1292 return found ? 0 : -EINVAL;
1293}
1294
1295void kvm_s390_destroy_adapters(struct kvm *kvm)
1296{
1297 int i;
1298 struct s390_map_info *map, *tmp;
1299
1300 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1301 if (!kvm->arch.adapters[i])
1302 continue;
1303 list_for_each_entry_safe(map, tmp,
1304 &kvm->arch.adapters[i]->maps, list) {
1305 list_del(&map->list);
1306 put_page(map->page);
1307 kfree(map);
1308 }
1309 kfree(kvm->arch.adapters[i]);
1310 }
1311}
1312
1313static int modify_io_adapter(struct kvm_device *dev,
1314 struct kvm_device_attr *attr)
1315{
1316 struct kvm_s390_io_adapter_req req;
1317 struct s390_io_adapter *adapter;
1318 int ret;
1319
1320 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1321 return -EFAULT;
1322
1323 adapter = get_io_adapter(dev->kvm, req.id);
1324 if (!adapter)
1325 return -EINVAL;
1326 switch (req.type) {
1327 case KVM_S390_IO_ADAPTER_MASK:
1328 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1329 if (ret > 0)
1330 ret = 0;
1331 break;
1332 case KVM_S390_IO_ADAPTER_MAP:
1333 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1334 break;
1335 case KVM_S390_IO_ADAPTER_UNMAP:
1336 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1337 break;
1338 default:
1339 ret = -EINVAL;
1340 }
1341
1342 return ret;
1343}
1344
c05c4186
JF		 1345static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1346{
1347 int r = 0;
3c038e6b
DD		 1348 unsigned int i;
1349 struct kvm_vcpu *vcpu;
c05c4186
JF		 1350
1351 switch (attr->group) {
1352 case KVM_DEV_FLIC_ENQUEUE:
1353 r = enqueue_floating_irq(dev, attr);
1354 break;
1355 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 1356 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 1357 break;
3c038e6b
DD		 1358 case KVM_DEV_FLIC_APF_ENABLE:
1359 dev->kvm->arch.gmap->pfault_enabled = 1;
1360 break;
1361 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1362 dev->kvm->arch.gmap->pfault_enabled = 0;
1363 /*
1364 * Make sure no async faults are in transition when
1365 * clearing the queues. So we don't need to worry
1366 * about late coming workers.
1367 */
1368 synchronize_srcu(&dev->kvm->srcu);
1369 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1370 kvm_clear_async_pf_completion_queue(vcpu);
1371 break;
841b91c5
CH		 1372 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1373 r = register_io_adapter(dev, attr);
1374 break;
1375 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1376 r = modify_io_adapter(dev, attr);
1377 break;
c05c4186
JF		 1378 default:
1379 r = -EINVAL;
1380 }
1381
1382 return r;
1383}
1384
1385static int flic_create(struct kvm_device *dev, u32 type)
1386{
1387 if (!dev)
1388 return -EINVAL;
1389 if (dev->kvm->arch.flic)
1390 return -EINVAL;
1391 dev->kvm->arch.flic = dev;
1392 return 0;
1393}
1394
1395static void flic_destroy(struct kvm_device *dev)
1396{
1397 dev->kvm->arch.flic = NULL;
1398 kfree(dev);
1399}
1400
1401/* s390 floating irq controller (flic) */
1402struct kvm_device_ops kvm_flic_ops = {
1403 .name = "kvm-flic",
1404 .get_attr = flic_get_attr,
1405 .set_attr = flic_set_attr,
1406 .create = flic_create,
1407 .destroy = flic_destroy,
1408};
84223598
CH		 1409
1410static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
1411{
1412 unsigned long bit;
1413
1414 bit = bit_nr + (addr % PAGE_SIZE) * 8;
1415
1416 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
1417}
1418
1419static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
1420 u64 addr)
1421{
1422 struct s390_map_info *map;
1423
1424 if (!adapter)
1425 return NULL;
1426
1427 list_for_each_entry(map, &adapter->maps, list) {
1428 if (map->guest_addr == addr)
1429 return map;
1430 }
1431 return NULL;
1432}
1433
1434static int adapter_indicators_set(struct kvm *kvm,
1435 struct s390_io_adapter *adapter,
1436 struct kvm_s390_adapter_int *adapter_int)
1437{
1438 unsigned long bit;
1439 int summary_set, idx;
1440 struct s390_map_info *info;
1441 void *map;
1442
1443 info = get_map_info(adapter, adapter_int->ind_addr);
1444 if (!info)
1445 return -1;
1446 map = page_address(info->page);
1447 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
1448 set_bit(bit, map);
1449 idx = srcu_read_lock(&kvm->srcu);
1450 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1451 set_page_dirty_lock(info->page);
1452 info = get_map_info(adapter, adapter_int->summary_addr);
1453 if (!info) {
1454 srcu_read_unlock(&kvm->srcu, idx);
1455 return -1;
1456 }
1457 map = page_address(info->page);
1458 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
1459 adapter->swap);
1460 summary_set = test_and_set_bit(bit, map);
1461 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1462 set_page_dirty_lock(info->page);
1463 srcu_read_unlock(&kvm->srcu, idx);
1464 return summary_set ? 0 : 1;
1465}
1466
1467/*
1468 * < 0 - not injected due to error
1469 * = 0 - coalesced, summary indicator already active
1470 * > 0 - injected interrupt
1471 */
1472static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
1473 struct kvm *kvm, int irq_source_id, int level,
1474 bool line_status)
1475{
1476 int ret;
1477 struct s390_io_adapter *adapter;
1478
1479 /* We're only interested in the 0->1 transition. */
1480 if (!level)
1481 return 0;
1482 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
1483 if (!adapter)
1484 return -1;
1485 down_read(&adapter->maps_lock);
1486 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
1487 up_read(&adapter->maps_lock);
1488 if ((ret > 0) && !adapter->masked) {
1489 struct kvm_s390_interrupt s390int = {
1490 .type = KVM_S390_INT_IO(1, 0, 0, 0),
1491 .parm = 0,
1492 .parm64 = (adapter->isc << 27) | 0x80000000,
1493 };
1494 ret = kvm_s390_inject_vm(kvm, &s390int);
1495 if (ret == 0)
1496 ret = 1;
1497 }
1498 return ret;
1499}
1500
8ba918d4 1501int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 1502 const struct kvm_irq_routing_entry *ue)
1503{
1504 int ret;
1505
1506 switch (ue->type) {
1507 case KVM_IRQ_ROUTING_S390_ADAPTER:
1508 e->set = set_adapter_int;
1509 e->adapter.summary_addr = ue->u.adapter.summary_addr;
1510 e->adapter.ind_addr = ue->u.adapter.ind_addr;
1511 e->adapter.summary_offset = ue->u.adapter.summary_offset;
1512 e->adapter.ind_offset = ue->u.adapter.ind_offset;
1513 e->adapter.adapter_id = ue->u.adapter.adapter_id;
1514 ret = 0;
1515 break;
1516 default:
1517 ret = -EINVAL;
1518 }
1519
1520 return ret;
1521}
1522
1523int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
1524 int irq_source_id, int level, bool line_status)
1525{
1526 return -EINVAL;
1527}
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