projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
KVM: s390/mm: readd address parameter to gmap_do_ipte_notify
[deliverable/linux.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
79395031 31static int 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
ba5c1e9b 80static int __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;
ba5c1e9b
CO		 89 case KVM_S390_INT_EMERGENCY:
90 if (psw_extint_disabled(vcpu))
91 return 0;
92 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
93 return 1;
94 return 0;
e029ae5b
TH		 95 case KVM_S390_INT_CLOCK_COMP:
96 return ckc_interrupts_enabled(vcpu);
97 case KVM_S390_INT_CPU_TIMER:
98 if (psw_extint_disabled(vcpu))
99 return 0;
100 if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
101 return 1;
102 return 0;
ba5c1e9b 103 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 104 case KVM_S390_INT_PFAULT_INIT:
105 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 106 case KVM_S390_INT_VIRTIO:
107 if (psw_extint_disabled(vcpu))
108 return 0;
109 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
110 return 1;
111 return 0;
112 case KVM_S390_PROGRAM_INT:
113 case KVM_S390_SIGP_STOP:
114 case KVM_S390_SIGP_SET_PREFIX:
115 case KVM_S390_RESTART:
116 return 1;
48a3e950
CH		 117 case KVM_S390_MCHK:
118 if (psw_mchk_disabled(vcpu))
119 return 0;
120 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
121 return 1;
122 return 0;
d8346b7d
CH		 123 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
124 if (psw_ioint_disabled(vcpu))
125 return 0;
79fd50c6
CH		 126 if (vcpu->arch.sie_block->gcr[6] &
127 int_word_to_isc_bits(inti->io.io_int_word))
d8346b7d
CH		 128 return 1;
129 return 0;
ba5c1e9b 130 default:
d8346b7d
CH		 131 printk(KERN_WARNING "illegal interrupt type %llx\n",
132 inti->type);
ba5c1e9b
CO		 133 BUG();
134 }
135 return 0;
136}
137
138static void __set_cpu_idle(struct kvm_vcpu *vcpu)
139{
ba5c1e9b
CO		 140 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
141 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
142}
143
144static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
145{
ba5c1e9b
CO		 146 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
147 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
148}
149
150static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
151{
4953919f
DH		 152 atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
153 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 154 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 155 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
156
157 if (guestdbg_enabled(vcpu)) {
158 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
159 LCTL_CR10 | LCTL_CR11);
160 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
161 }
db373861
DH		 162
163 if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP)
164 atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 165}
166
167static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
168{
169 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
170}
171
172static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
180c12fb 173 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 174{
175 switch (inti->type) {
7697e71f 176 case KVM_S390_INT_EXTERNAL_CALL:
ba5c1e9b
CO		 177 case KVM_S390_INT_EMERGENCY:
178 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 179 case KVM_S390_INT_PFAULT_INIT:
180 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b 181 case KVM_S390_INT_VIRTIO:
e029ae5b
TH		 182 case KVM_S390_INT_CLOCK_COMP:
183 case KVM_S390_INT_CPU_TIMER:
ba5c1e9b
CO		 184 if (psw_extint_disabled(vcpu))
185 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
186 else
187 vcpu->arch.sie_block->lctl |= LCTL_CR0;
188 break;
189 case KVM_S390_SIGP_STOP:
190 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
191 break;
48a3e950
CH		 192 case KVM_S390_MCHK:
193 if (psw_mchk_disabled(vcpu))
194 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
195 else
196 vcpu->arch.sie_block->lctl |= LCTL_CR14;
197 break;
d8346b7d
CH		 198 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
199 if (psw_ioint_disabled(vcpu))
200 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
201 else
202 vcpu->arch.sie_block->lctl |= LCTL_CR6;
203 break;
ba5c1e9b
CO		 204 default:
205 BUG();
206 }
207}
208
8a2ef71b
JF		 209static u16 get_ilc(struct kvm_vcpu *vcpu)
210{
211 const unsigned short table[] = { 2, 4, 4, 6 };
212
213 switch (vcpu->arch.sie_block->icptcode) {
214 case ICPT_INST:
215 case ICPT_INSTPROGI:
216 case ICPT_OPEREXC:
217 case ICPT_PARTEXEC:
218 case ICPT_IOINST:
219 /* last instruction only stored for these icptcodes */
220 return table[vcpu->arch.sie_block->ipa >> 14];
221 case ICPT_PROGI:
222 return vcpu->arch.sie_block->pgmilc;
223 default:
224 return 0;
225 }
226}
227
8712836b
DH		 228static int __deliver_prog_irq(struct kvm_vcpu *vcpu,
229 struct kvm_s390_pgm_info *pgm_info)
230{
8712836b 231 int rc = 0;
8a2ef71b 232 u16 ilc = get_ilc(vcpu);
8712836b
DH		 233
234 switch (pgm_info->code & ~PGM_PER) {
235 case PGM_AFX_TRANSLATION:
236 case PGM_ASX_TRANSLATION:
237 case PGM_EX_TRANSLATION:
238 case PGM_LFX_TRANSLATION:
239 case PGM_LSTE_SEQUENCE:
240 case PGM_LSX_TRANSLATION:
241 case PGM_LX_TRANSLATION:
242 case PGM_PRIMARY_AUTHORITY:
243 case PGM_SECONDARY_AUTHORITY:
244 case PGM_SPACE_SWITCH:
245 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
246 (u64 *)__LC_TRANS_EXC_CODE);
247 break;
248 case PGM_ALEN_TRANSLATION:
249 case PGM_ALE_SEQUENCE:
250 case PGM_ASTE_INSTANCE:
251 case PGM_ASTE_SEQUENCE:
252 case PGM_ASTE_VALIDITY:
253 case PGM_EXTENDED_AUTHORITY:
254 rc = put_guest_lc(vcpu, pgm_info->exc_access_id,
255 (u8 *)__LC_EXC_ACCESS_ID);
256 break;
257 case PGM_ASCE_TYPE:
258 case PGM_PAGE_TRANSLATION:
259 case PGM_REGION_FIRST_TRANS:
260 case PGM_REGION_SECOND_TRANS:
261 case PGM_REGION_THIRD_TRANS:
262 case PGM_SEGMENT_TRANSLATION:
263 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
264 (u64 *)__LC_TRANS_EXC_CODE);
265 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
266 (u8 *)__LC_EXC_ACCESS_ID);
267 rc |= put_guest_lc(vcpu, pgm_info->op_access_id,
268 (u8 *)__LC_OP_ACCESS_ID);
269 break;
270 case PGM_MONITOR:
271 rc = put_guest_lc(vcpu, pgm_info->mon_class_nr,
272 (u64 *)__LC_MON_CLASS_NR);
273 rc |= put_guest_lc(vcpu, pgm_info->mon_code,
274 (u64 *)__LC_MON_CODE);
275 break;
276 case PGM_DATA:
277 rc = put_guest_lc(vcpu, pgm_info->data_exc_code,
278 (u32 *)__LC_DATA_EXC_CODE);
279 break;
280 case PGM_PROTECTION:
281 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
282 (u64 *)__LC_TRANS_EXC_CODE);
283 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
284 (u8 *)__LC_EXC_ACCESS_ID);
285 break;
286 }
287
288 if (pgm_info->code & PGM_PER) {
289 rc |= put_guest_lc(vcpu, pgm_info->per_code,
290 (u8 *) __LC_PER_CODE);
291 rc |= put_guest_lc(vcpu, pgm_info->per_atmid,
292 (u8 *)__LC_PER_ATMID);
293 rc |= put_guest_lc(vcpu, pgm_info->per_address,
294 (u64 *) __LC_PER_ADDRESS);
295 rc |= put_guest_lc(vcpu, pgm_info->per_access_id,
296 (u8 *) __LC_PER_ACCESS_ID);
297 }
298
8a2ef71b 299 rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
8712836b
DH		 300 rc |= put_guest_lc(vcpu, pgm_info->code,
301 (u16 *)__LC_PGM_INT_CODE);
302 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
303 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
304 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
305 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
306
307 return rc;
308}
309
79395031 310static int __do_deliver_interrupt(struct kvm_vcpu *vcpu,
180c12fb 311 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 312{
313 const unsigned short table[] = { 2, 4, 4, 6 };
dc5008b9 314 int rc = 0;
ba5c1e9b
CO		 315
316 switch (inti->type) {
317 case KVM_S390_INT_EMERGENCY:
318 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
319 vcpu->stat.deliver_emergency_signal++;
ade38c31
CH		 320 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
321 inti->emerg.code, 0);
1a03b764
JF		 322 rc = put_guest_lc(vcpu, 0x1201, (u16 *)__LC_EXT_INT_CODE);
323 rc |= put_guest_lc(vcpu, inti->emerg.code,
324 (u16 *)__LC_EXT_CPU_ADDR);
325 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
326 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
327 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 328 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ba5c1e9b 329 break;
7697e71f
CE		 330 case KVM_S390_INT_EXTERNAL_CALL:
331 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
332 vcpu->stat.deliver_external_call++;
ade38c31
CH		 333 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
334 inti->extcall.code, 0);
1a03b764
JF		 335 rc = put_guest_lc(vcpu, 0x1202, (u16 *)__LC_EXT_INT_CODE);
336 rc |= put_guest_lc(vcpu, inti->extcall.code,
337 (u16 *)__LC_EXT_CPU_ADDR);
338 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
339 &vcpu->arch.sie_block->gpsw,
340 sizeof(psw_t));
341 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
342 &vcpu->arch.sie_block->gpsw,
343 sizeof(psw_t));
7697e71f 344 break;
e029ae5b
TH		 345 case KVM_S390_INT_CLOCK_COMP:
346 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
347 inti->ext.ext_params, 0);
79395031 348 rc = deliver_ckc_interrupt(vcpu);
e029ae5b
TH		 349 break;
350 case KVM_S390_INT_CPU_TIMER:
351 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
352 inti->ext.ext_params, 0);
353 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
354 (u16 *)__LC_EXT_INT_CODE);
355 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
356 &vcpu->arch.sie_block->gpsw,
357 sizeof(psw_t));
358 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
359 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
360 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
361 (u32 *)__LC_EXT_PARAMS);
362 break;
ba5c1e9b
CO		 363 case KVM_S390_INT_SERVICE:
364 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
365 inti->ext.ext_params);
366 vcpu->stat.deliver_service_signal++;
ade38c31
CH		 367 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
368 inti->ext.ext_params, 0);
7988276d
HC		 369 rc = put_guest_lc(vcpu, 0x2401, (u16 *)__LC_EXT_INT_CODE);
370 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
371 &vcpu->arch.sie_block->gpsw,
372 sizeof(psw_t));
373 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 374 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
7988276d
HC		 375 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
376 (u32 *)__LC_EXT_PARAMS);
ba5c1e9b 377 break;
3c038e6b
DD		 378 case KVM_S390_INT_PFAULT_INIT:
379 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
380 inti->ext.ext_params2);
44c6ca3d
JF		 381 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
382 (u16 *) __LC_EXT_INT_CODE);
383 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
1a03b764
JF		 384 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
385 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
386 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
3c038e6b 387 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
1a03b764
JF		 388 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
389 (u64 *) __LC_EXT_PARAMS2);
3c038e6b
DD		 390 break;
391 case KVM_S390_INT_PFAULT_DONE:
392 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
393 inti->ext.ext_params2);
7988276d
HC		 394 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
395 rc |= put_guest_lc(vcpu, 0x0680, (u16 *)__LC_EXT_CPU_ADDR);
396 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
397 &vcpu->arch.sie_block->gpsw,
398 sizeof(psw_t));
399 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
3c038e6b 400 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
7988276d
HC		 401 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
402 (u64 *)__LC_EXT_PARAMS2);
3c038e6b 403 break;
ba5c1e9b 404 case KVM_S390_INT_VIRTIO:
33e19115 405 VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
ba5c1e9b
CO		 406 inti->ext.ext_params, inti->ext.ext_params2);
407 vcpu->stat.deliver_virtio_interrupt++;
ade38c31
CH		 408 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
409 inti->ext.ext_params,
410 inti->ext.ext_params2);
7988276d
HC		 411 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
412 rc |= put_guest_lc(vcpu, 0x0d00, (u16 *)__LC_EXT_CPU_ADDR);
413 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
414 &vcpu->arch.sie_block->gpsw,
415 sizeof(psw_t));
416 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 417 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
7988276d
HC		 418 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
419 (u32 *)__LC_EXT_PARAMS);
420 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
421 (u64 *)__LC_EXT_PARAMS2);
ba5c1e9b 422 break;
ba5c1e9b
CO		 423 case KVM_S390_SIGP_STOP:
424 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop");
425 vcpu->stat.deliver_stop_signal++;
ade38c31
CH		 426 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
427 0, 0);
ba5c1e9b
CO		 428 __set_intercept_indicator(vcpu, inti);
429 break;
430
431 case KVM_S390_SIGP_SET_PREFIX:
432 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x",
433 inti->prefix.address);
434 vcpu->stat.deliver_prefix_signal++;
ade38c31
CH		 435 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
436 inti->prefix.address, 0);
8d26cf7b 437 kvm_s390_set_prefix(vcpu, inti->prefix.address);
ba5c1e9b
CO		 438 break;
439
440 case KVM_S390_RESTART:
441 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
442 vcpu->stat.deliver_restart_signal++;
ade38c31
CH		 443 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
444 0, 0);
1a03b764
JF		 445 rc = write_guest_lc(vcpu,
446 offsetof(struct _lowcore, restart_old_psw),
447 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
448 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
449 &vcpu->arch.sie_block->gpsw,
450 sizeof(psw_t));
ba5c1e9b 451 break;
ba5c1e9b
CO		 452 case KVM_S390_PROGRAM_INT:
453 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
454 inti->pgm.code,
455 table[vcpu->arch.sie_block->ipa >> 14]);
456 vcpu->stat.deliver_program_int++;
ade38c31
CH		 457 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
458 inti->pgm.code, 0);
8712836b 459 rc = __deliver_prog_irq(vcpu, &inti->pgm);
ba5c1e9b
CO		 460 break;
461
48a3e950
CH		 462 case KVM_S390_MCHK:
463 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
464 inti->mchk.mcic);
465 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
466 inti->mchk.cr14,
467 inti->mchk.mcic);
dc5008b9
HC		 468 rc = kvm_s390_vcpu_store_status(vcpu,
469 KVM_S390_STORE_STATUS_PREFIXED);
7988276d
HC		 470 rc |= put_guest_lc(vcpu, inti->mchk.mcic, (u64 *)__LC_MCCK_CODE);
471 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
472 &vcpu->arch.sie_block->gpsw,
473 sizeof(psw_t));
474 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
dc5008b9 475 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
48a3e950
CH		 476 break;
477
d8346b7d
CH		 478 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
479 {
480 __u32 param0 = ((__u32)inti->io.subchannel_id << 16) |
481 inti->io.subchannel_nr;
482 __u64 param1 = ((__u64)inti->io.io_int_parm << 32) |
483 inti->io.io_int_word;
484 VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
485 vcpu->stat.deliver_io_int++;
486 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
487 param0, param1);
7988276d
HC		 488 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
489 (u16 *)__LC_SUBCHANNEL_ID);
490 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
491 (u16 *)__LC_SUBCHANNEL_NR);
492 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
493 (u32 *)__LC_IO_INT_PARM);
494 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
495 (u32 *)__LC_IO_INT_WORD);
496 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
497 &vcpu->arch.sie_block->gpsw,
498 sizeof(psw_t));
499 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
500 &vcpu->arch.sie_block->gpsw,
501 sizeof(psw_t));
d8346b7d
CH		 502 break;
503 }
ba5c1e9b
CO		 504 default:
505 BUG();
506 }
79395031
JF		 507
508 return rc;
ba5c1e9b
CO		 509}
510
79395031 511static int deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
ba5c1e9b 512{
dc5008b9 513 int rc;
ba5c1e9b 514
1a03b764
JF		 515 rc = put_guest_lc(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE);
516 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
517 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
518 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
519 &vcpu->arch.sie_block->gpsw,
520 sizeof(psw_t));
79395031 521 return rc;
ba5c1e9b
CO		 522}
523
4953919f
DH		 524/* Check whether SIGP interpretation facility has an external call pending */
525int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu)
526{
527 atomic_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl;
528
529 if (!psw_extint_disabled(vcpu) &&
530 (vcpu->arch.sie_block->gcr[0] & 0x2000ul) &&
531 (atomic_read(sigp_ctrl) & SIGP_CTRL_C) &&
532 (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND))
533 return 1;
534
535 return 0;
536}
537
3c038e6b 538int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
ba5c1e9b 539{
180c12fb
CB		 540 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
541 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
542 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 543 int rc = 0;
544
545 if (atomic_read(&li->active)) {
4ae3c081 546 spin_lock(&li->lock);
ba5c1e9b
CO		 547 list_for_each_entry(inti, &li->list, list)
548 if (__interrupt_is_deliverable(vcpu, inti)) {
549 rc = 1;
550 break;
551 }
4ae3c081 552 spin_unlock(&li->lock);
ba5c1e9b
CO		 553 }
554
555 if ((!rc) && atomic_read(&fi->active)) {
b037a4f3 556 spin_lock(&fi->lock);
ba5c1e9b
CO		 557 list_for_each_entry(inti, &fi->list, list)
558 if (__interrupt_is_deliverable(vcpu, inti)) {
559 rc = 1;
560 break;
561 }
b037a4f3 562 spin_unlock(&fi->lock);
ba5c1e9b
CO		 563 }
564
bb78c5ec
DH		 565 if (!rc && kvm_cpu_has_pending_timer(vcpu))
566 rc = 1;
ba5c1e9b 567
4953919f
DH		 568 if (!rc && kvm_s390_si_ext_call_pending(vcpu))
569 rc = 1;
570
ba5c1e9b
CO		 571 return rc;
572}
573
3d80840d
MT		 574int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
575{
bb78c5ec
DH		 576 if (!(vcpu->arch.sie_block->ckc <
577 get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
578 return 0;
579 if (!ckc_interrupts_enabled(vcpu))
580 return 0;
581 return 1;
3d80840d
MT		 582}
583
ba5c1e9b
CO		 584int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
585{
586 u64 now, sltime;
ba5c1e9b
CO		 587
588 vcpu->stat.exit_wait_state++;
ba5c1e9b 589
0759d068
DH		 590 /* fast path */
591 if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu))
592 return 0;
e52b2af5 593
ba5c1e9b
CO		 594 if (psw_interrupts_disabled(vcpu)) {
595 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 596 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 597 }
598
0759d068 599 __set_cpu_idle(vcpu);
bb78c5ec 600 if (!ckc_interrupts_enabled(vcpu)) {
ba5c1e9b
CO		 601 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
602 goto no_timer;
603 }
604
8c071b0f 605 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
ed4f2094 606 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
ca872302
CB		 607 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
608 VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
ba5c1e9b 609no_timer:
800c1065 610 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 611 kvm_vcpu_block(vcpu);
ba5c1e9b 612 __unset_cpu_idle(vcpu);
800c1065
TH		 613 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
614
ca872302 615 hrtimer_try_to_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 616 return 0;
617}
618
0e9c85a5
DH		 619void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
620{
621 if (waitqueue_active(&vcpu->wq)) {
622 /*
623 * The vcpu gave up the cpu voluntarily, mark it as a good
624 * yield-candidate.
625 */
626 vcpu->preempted = true;
627 wake_up_interruptible(&vcpu->wq);
628 }
629}
630
ca872302
CB		 631enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
632{
633 struct kvm_vcpu *vcpu;
634
635 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
ea74c0ea 636 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 637
638 return HRTIMER_NORESTART;
639}
ba5c1e9b 640
2ed10cc1
JF		 641void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
642{
643 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
644 struct kvm_s390_interrupt_info *n, *inti = NULL;
645
4ae3c081 646 spin_lock(&li->lock);
2ed10cc1
JF		 647 list_for_each_entry_safe(inti, n, &li->list, list) {
648 list_del(&inti->list);
649 kfree(inti);
650 }
651 atomic_set(&li->active, 0);
4ae3c081 652 spin_unlock(&li->lock);
4953919f
DH		 653
654 /* clear pending external calls set by sigp interpretation facility */
655 atomic_clear_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
656 atomic_clear_mask(SIGP_CTRL_C,
657 &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl);
2ed10cc1
JF		 658}
659
79395031 660int kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 661{
180c12fb
CB		 662 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
663 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
664 struct kvm_s390_interrupt_info *n, *inti = NULL;
ba5c1e9b 665 int deliver;
79395031 666 int rc = 0;
ba5c1e9b
CO		 667
668 __reset_intercept_indicators(vcpu);
669 if (atomic_read(&li->active)) {
670 do {
671 deliver = 0;
4ae3c081 672 spin_lock(&li->lock);
ba5c1e9b
CO		 673 list_for_each_entry_safe(inti, n, &li->list, list) {
674 if (__interrupt_is_deliverable(vcpu, inti)) {
675 list_del(&inti->list);
676 deliver = 1;
677 break;
678 }
679 __set_intercept_indicator(vcpu, inti);
680 }
681 if (list_empty(&li->list))
682 atomic_set(&li->active, 0);
4ae3c081 683 spin_unlock(&li->lock);
ba5c1e9b 684 if (deliver) {
79395031 685 rc = __do_deliver_interrupt(vcpu, inti);
ba5c1e9b
CO		 686 kfree(inti);
687 }
79395031 688 } while (!rc && deliver);
ba5c1e9b
CO		 689 }
690
79395031
JF		 691 if (!rc && kvm_cpu_has_pending_timer(vcpu))
692 rc = deliver_ckc_interrupt(vcpu);
ba5c1e9b 693
79395031 694 if (!rc && atomic_read(&fi->active)) {
ba5c1e9b
CO		 695 do {
696 deliver = 0;
b037a4f3 697 spin_lock(&fi->lock);
ba5c1e9b
CO		 698 list_for_each_entry_safe(inti, n, &fi->list, list) {
699 if (__interrupt_is_deliverable(vcpu, inti)) {
700 list_del(&inti->list);
a91b8ebe 701 fi->irq_count--;
ba5c1e9b
CO		 702 deliver = 1;
703 break;
704 }
705 __set_intercept_indicator(vcpu, inti);
706 }
707 if (list_empty(&fi->list))
708 atomic_set(&fi->active, 0);
b037a4f3 709 spin_unlock(&fi->lock);
ba5c1e9b 710 if (deliver) {
79395031 711 rc = __do_deliver_interrupt(vcpu, inti);
ba5c1e9b
CO		 712 kfree(inti);
713 }
79395031 714 } while (!rc && deliver);
ba5c1e9b 715 }
79395031
JF		 716
717 return rc;
ba5c1e9b
CO		 718}
719
720int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
721{
180c12fb
CB		 722 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
723 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 724
725 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
726 if (!inti)
727 return -ENOMEM;
728
a419aef8 729 inti->type = KVM_S390_PROGRAM_INT;
ba5c1e9b
CO		 730 inti->pgm.code = code;
731
732 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
ade38c31 733 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, inti->type, code, 0, 1);
4ae3c081 734 spin_lock(&li->lock);
ba5c1e9b
CO		 735 list_add(&inti->list, &li->list);
736 atomic_set(&li->active, 1);
d0321a24 737 BUG_ON(waitqueue_active(li->wq));
4ae3c081 738 spin_unlock(&li->lock);
bcd84683
JF		 739 return 0;
740}
741
742int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
743 struct kvm_s390_pgm_info *pgm_info)
744{
745 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
746 struct kvm_s390_interrupt_info *inti;
747
748 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
749 if (!inti)
750 return -ENOMEM;
751
752 VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
753 pgm_info->code);
754 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
755 pgm_info->code, 0, 1);
756
757 inti->type = KVM_S390_PROGRAM_INT;
758 memcpy(&inti->pgm, pgm_info, sizeof(inti->pgm));
4ae3c081 759 spin_lock(&li->lock);
bcd84683
JF		 760 list_add(&inti->list, &li->list);
761 atomic_set(&li->active, 1);
762 BUG_ON(waitqueue_active(li->wq));
4ae3c081 763 spin_unlock(&li->lock);
ba5c1e9b
CO		 764 return 0;
765}
766
fa6b7fe9
CH		 767struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
768 u64 cr6, u64 schid)
769{
770 struct kvm_s390_float_interrupt *fi;
771 struct kvm_s390_interrupt_info *inti, *iter;
772
773 if ((!schid && !cr6) || (schid && cr6))
774 return NULL;
775 mutex_lock(&kvm->lock);
776 fi = &kvm->arch.float_int;
777 spin_lock(&fi->lock);
778 inti = NULL;
779 list_for_each_entry(iter, &fi->list, list) {
780 if (!is_ioint(iter->type))
781 continue;
79fd50c6
CH		 782 if (cr6 &&
783 ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
fa6b7fe9
CH		 784 continue;
785 if (schid) {
786 if (((schid & 0x00000000ffff0000) >> 16) !=
787 iter->io.subchannel_id)
788 continue;
789 if ((schid & 0x000000000000ffff) !=
790 iter->io.subchannel_nr)
791 continue;
792 }
793 inti = iter;
794 break;
795 }
a91b8ebe 796 if (inti) {
fa6b7fe9 797 list_del_init(&inti->list);
a91b8ebe
JF		 798 fi->irq_count--;
799 }
fa6b7fe9
CH		 800 if (list_empty(&fi->list))
801 atomic_set(&fi->active, 0);
802 spin_unlock(&fi->lock);
803 mutex_unlock(&kvm->lock);
804 return inti;
805}
ba5c1e9b 806
a91b8ebe 807static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
ba5c1e9b 808{
180c12fb
CB		 809 struct kvm_s390_local_interrupt *li;
810 struct kvm_s390_float_interrupt *fi;
c05c4186 811 struct kvm_s390_interrupt_info *iter;
1ee0bc55 812 struct kvm_vcpu *dst_vcpu = NULL;
ba5c1e9b 813 int sigcpu;
a91b8ebe 814 int rc = 0;
ba5c1e9b 815
c05c4186
JF		 816 mutex_lock(&kvm->lock);
817 fi = &kvm->arch.float_int;
818 spin_lock(&fi->lock);
a91b8ebe
JF		 819 if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
820 rc = -EINVAL;
821 goto unlock_fi;
822 }
823 fi->irq_count++;
c05c4186
JF		 824 if (!is_ioint(inti->type)) {
825 list_add_tail(&inti->list, &fi->list);
826 } else {
827 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
828
829 /* Keep I/O interrupts sorted in isc order. */
830 list_for_each_entry(iter, &fi->list, list) {
831 if (!is_ioint(iter->type))
832 continue;
833 if (int_word_to_isc_bits(iter->io.io_int_word)
834 <= isc_bits)
835 continue;
836 break;
837 }
838 list_add_tail(&inti->list, &iter->list);
839 }
840 atomic_set(&fi->active, 1);
841 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
842 if (sigcpu == KVM_MAX_VCPUS) {
843 do {
844 sigcpu = fi->next_rr_cpu++;
845 if (sigcpu == KVM_MAX_VCPUS)
846 sigcpu = fi->next_rr_cpu = 0;
1ee0bc55 847 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
c05c4186 848 }
1ee0bc55
JF		 849 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
850 li = &dst_vcpu->arch.local_int;
4ae3c081 851 spin_lock(&li->lock);
c05c4186 852 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
4ae3c081 853 spin_unlock(&li->lock);
0e9c85a5 854 kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
a91b8ebe 855unlock_fi:
c05c4186
JF		 856 spin_unlock(&fi->lock);
857 mutex_unlock(&kvm->lock);
a91b8ebe 858 return rc;
c05c4186
JF		 859}
860
861int kvm_s390_inject_vm(struct kvm *kvm,
862 struct kvm_s390_interrupt *s390int)
863{
864 struct kvm_s390_interrupt_info *inti;
865
ba5c1e9b
CO		 866 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
867 if (!inti)
868 return -ENOMEM;
869
c05c4186
JF		 870 inti->type = s390int->type;
871 switch (inti->type) {
ba5c1e9b 872 case KVM_S390_INT_VIRTIO:
33e19115 873 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 874 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 875 inti->ext.ext_params = s390int->parm;
876 inti->ext.ext_params2 = s390int->parm64;
877 break;
878 case KVM_S390_INT_SERVICE:
879 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 880 inti->ext.ext_params = s390int->parm;
881 break;
3c038e6b
DD		 882 case KVM_S390_INT_PFAULT_DONE:
883 inti->type = s390int->type;
884 inti->ext.ext_params2 = s390int->parm64;
885 break;
48a3e950
CH		 886 case KVM_S390_MCHK:
887 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
888 s390int->parm64);
48a3e950
CH		 889 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
890 inti->mchk.mcic = s390int->parm64;
891 break;
d8346b7d 892 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
c05c4186 893 if (inti->type & IOINT_AI_MASK)
d8346b7d
CH		 894 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
895 else
896 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
897 s390int->type & IOINT_CSSID_MASK,
898 s390int->type & IOINT_SSID_MASK,
899 s390int->type & IOINT_SCHID_MASK);
d8346b7d
CH		 900 inti->io.subchannel_id = s390int->parm >> 16;
901 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
902 inti->io.io_int_parm = s390int->parm64 >> 32;
903 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
904 break;
ba5c1e9b
CO		 905 default:
906 kfree(inti);
907 return -EINVAL;
908 }
ade38c31
CH		 909 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
910 2);
ba5c1e9b 911
a91b8ebe 912 return __inject_vm(kvm, inti);
ba5c1e9b
CO		 913}
914
2f32d4ea
CH		 915void kvm_s390_reinject_io_int(struct kvm *kvm,
916 struct kvm_s390_interrupt_info *inti)
917{
918 __inject_vm(kvm, inti);
919}
920
ba5c1e9b
CO		 921int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
922 struct kvm_s390_interrupt *s390int)
923{
180c12fb
CB		 924 struct kvm_s390_local_interrupt *li;
925 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 926
927 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
928 if (!inti)
929 return -ENOMEM;
930
931 switch (s390int->type) {
932 case KVM_S390_PROGRAM_INT:
933 if (s390int->parm & 0xffff0000) {
934 kfree(inti);
935 return -EINVAL;
936 }
937 inti->type = s390int->type;
938 inti->pgm.code = s390int->parm;
939 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
940 s390int->parm);
941 break;
b7e6e4d3
CB		 942 case KVM_S390_SIGP_SET_PREFIX:
943 inti->prefix.address = s390int->parm;
944 inti->type = s390int->type;
945 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
946 s390int->parm);
947 break;
ba5c1e9b
CO		 948 case KVM_S390_SIGP_STOP:
949 case KVM_S390_RESTART:
e029ae5b
TH		 950 case KVM_S390_INT_CLOCK_COMP:
951 case KVM_S390_INT_CPU_TIMER:
82a12737
JH		 952 VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
953 inti->type = s390int->type;
954 break;
7697e71f 955 case KVM_S390_INT_EXTERNAL_CALL:
82a12737
JH		 956 if (s390int->parm & 0xffff0000) {
957 kfree(inti);
958 return -EINVAL;
959 }
960 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
961 s390int->parm);
962 inti->type = s390int->type;
963 inti->extcall.code = s390int->parm;
964 break;
ba5c1e9b 965 case KVM_S390_INT_EMERGENCY:
82a12737
JH		 966 if (s390int->parm & 0xffff0000) {
967 kfree(inti);
968 return -EINVAL;
969 }
970 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm);
ba5c1e9b 971 inti->type = s390int->type;
82a12737 972 inti->emerg.code = s390int->parm;
ba5c1e9b 973 break;
48a3e950
CH		 974 case KVM_S390_MCHK:
975 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
976 s390int->parm64);
977 inti->type = s390int->type;
978 inti->mchk.mcic = s390int->parm64;
979 break;
3c038e6b
DD		 980 case KVM_S390_INT_PFAULT_INIT:
981 inti->type = s390int->type;
982 inti->ext.ext_params2 = s390int->parm64;
983 break;
ba5c1e9b
CO		 984 case KVM_S390_INT_VIRTIO:
985 case KVM_S390_INT_SERVICE:
d8346b7d 986 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b
CO		 987 default:
988 kfree(inti);
989 return -EINVAL;
990 }
ade38c31
CH		 991 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm,
992 s390int->parm64, 2);
ba5c1e9b 993
ba5c1e9b 994 li = &vcpu->arch.local_int;
4ae3c081 995 spin_lock(&li->lock);
ba5c1e9b
CO		 996 if (inti->type == KVM_S390_PROGRAM_INT)
997 list_add(&inti->list, &li->list);
998 else
999 list_add_tail(&inti->list, &li->list);
1000 atomic_set(&li->active, 1);
1001 if (inti->type == KVM_S390_SIGP_STOP)
1002 li->action_bits |= ACTION_STOP_ON_STOP;
1003 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
4ae3c081 1004 spin_unlock(&li->lock);
0e9c85a5 1005 kvm_s390_vcpu_wakeup(vcpu);
ba5c1e9b
CO		 1006 return 0;
1007}
c05c4186 1008
67335e63 1009void kvm_s390_clear_float_irqs(struct kvm *kvm)
c05c4186
JF		 1010{
1011 struct kvm_s390_float_interrupt *fi;
1012 struct kvm_s390_interrupt_info *n, *inti = NULL;
1013
1014 mutex_lock(&kvm->lock);
1015 fi = &kvm->arch.float_int;
1016 spin_lock(&fi->lock);
1017 list_for_each_entry_safe(inti, n, &fi->list, list) {
1018 list_del(&inti->list);
1019 kfree(inti);
1020 }
a91b8ebe 1021 fi->irq_count = 0;
c05c4186
JF		 1022 atomic_set(&fi->active, 0);
1023 spin_unlock(&fi->lock);
1024 mutex_unlock(&kvm->lock);
1025}
1026
1027static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti,
1028 u8 *addr)
1029{
1030 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1031 struct kvm_s390_irq irq = {0};
1032
1033 irq.type = inti->type;
1034 switch (inti->type) {
3c038e6b
DD		 1035 case KVM_S390_INT_PFAULT_INIT:
1036 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1037 case KVM_S390_INT_VIRTIO:
1038 case KVM_S390_INT_SERVICE:
1039 irq.u.ext = inti->ext;
1040 break;
1041 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1042 irq.u.io = inti->io;
1043 break;
1044 case KVM_S390_MCHK:
1045 irq.u.mchk = inti->mchk;
1046 break;
1047 default:
1048 return -EINVAL;
1049 }
1050
1051 if (copy_to_user(uptr, &irq, sizeof(irq)))
1052 return -EFAULT;
1053
1054 return 0;
1055}
1056
1057static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len)
1058{
1059 struct kvm_s390_interrupt_info *inti;
1060 struct kvm_s390_float_interrupt *fi;
1061 int ret = 0;
1062 int n = 0;
1063
1064 mutex_lock(&kvm->lock);
1065 fi = &kvm->arch.float_int;
1066 spin_lock(&fi->lock);
1067
1068 list_for_each_entry(inti, &fi->list, list) {
1069 if (len < sizeof(struct kvm_s390_irq)) {
1070 /* signal userspace to try again */
1071 ret = -ENOMEM;
1072 break;
1073 }
1074 ret = copy_irq_to_user(inti, buf);
1075 if (ret)
1076 break;
1077 buf += sizeof(struct kvm_s390_irq);
1078 len -= sizeof(struct kvm_s390_irq);
1079 n++;
1080 }
1081
1082 spin_unlock(&fi->lock);
1083 mutex_unlock(&kvm->lock);
1084
1085 return ret < 0 ? ret : n;
1086}
1087
1088static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1089{
1090 int r;
1091
1092 switch (attr->group) {
1093 case KVM_DEV_FLIC_GET_ALL_IRQS:
1094 r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr,
1095 attr->attr);
1096 break;
1097 default:
1098 r = -EINVAL;
1099 }
1100
1101 return r;
1102}
1103
1104static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1105 u64 addr)
1106{
1107 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1108 void *target = NULL;
1109 void __user *source;
1110 u64 size;
1111
1112 if (get_user(inti->type, (u64 __user *)addr))
1113 return -EFAULT;
1114
1115 switch (inti->type) {
3c038e6b
DD		 1116 case KVM_S390_INT_PFAULT_INIT:
1117 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1118 case KVM_S390_INT_VIRTIO:
1119 case KVM_S390_INT_SERVICE:
1120 target = (void *) &inti->ext;
1121 source = &uptr->u.ext;
1122 size = sizeof(inti->ext);
1123 break;
1124 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1125 target = (void *) &inti->io;
1126 source = &uptr->u.io;
1127 size = sizeof(inti->io);
1128 break;
1129 case KVM_S390_MCHK:
1130 target = (void *) &inti->mchk;
1131 source = &uptr->u.mchk;
1132 size = sizeof(inti->mchk);
1133 break;
1134 default:
1135 return -EINVAL;
1136 }
1137
1138 if (copy_from_user(target, source, size))
1139 return -EFAULT;
1140
1141 return 0;
1142}
1143
1144static int enqueue_floating_irq(struct kvm_device *dev,
1145 struct kvm_device_attr *attr)
1146{
1147 struct kvm_s390_interrupt_info *inti = NULL;
1148 int r = 0;
1149 int len = attr->attr;
1150
1151 if (len % sizeof(struct kvm_s390_irq) != 0)
1152 return -EINVAL;
1153 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1154 return -EINVAL;
1155
1156 while (len >= sizeof(struct kvm_s390_irq)) {
1157 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1158 if (!inti)
1159 return -ENOMEM;
1160
1161 r = copy_irq_from_user(inti, attr->addr);
1162 if (r) {
1163 kfree(inti);
1164 return r;
1165 }
a91b8ebe
JF		 1166 r = __inject_vm(dev->kvm, inti);
1167 if (r) {
1168 kfree(inti);
1169 return r;
1170 }
c05c4186
JF		 1171 len -= sizeof(struct kvm_s390_irq);
1172 attr->addr += sizeof(struct kvm_s390_irq);
1173 }
1174
1175 return r;
1176}
1177
841b91c5
CH		 1178static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1179{
1180 if (id >= MAX_S390_IO_ADAPTERS)
1181 return NULL;
1182 return kvm->arch.adapters[id];
1183}
1184
1185static int register_io_adapter(struct kvm_device *dev,
1186 struct kvm_device_attr *attr)
1187{
1188 struct s390_io_adapter *adapter;
1189 struct kvm_s390_io_adapter adapter_info;
1190
1191 if (copy_from_user(&adapter_info,
1192 (void __user *)attr->addr, sizeof(adapter_info)))
1193 return -EFAULT;
1194
1195 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1196 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1197 return -EINVAL;
1198
1199 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1200 if (!adapter)
1201 return -ENOMEM;
1202
1203 INIT_LIST_HEAD(&adapter->maps);
1204 init_rwsem(&adapter->maps_lock);
1205 atomic_set(&adapter->nr_maps, 0);
1206 adapter->id = adapter_info.id;
1207 adapter->isc = adapter_info.isc;
1208 adapter->maskable = adapter_info.maskable;
1209 adapter->masked = false;
1210 adapter->swap = adapter_info.swap;
1211 dev->kvm->arch.adapters[adapter->id] = adapter;
1212
1213 return 0;
1214}
1215
1216int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1217{
1218 int ret;
1219 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1220
1221 if (!adapter || !adapter->maskable)
1222 return -EINVAL;
1223 ret = adapter->masked;
1224 adapter->masked = masked;
1225 return ret;
1226}
1227
1228static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1229{
1230 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1231 struct s390_map_info *map;
1232 int ret;
1233
1234 if (!adapter || !addr)
1235 return -EINVAL;
1236
1237 map = kzalloc(sizeof(*map), GFP_KERNEL);
1238 if (!map) {
1239 ret = -ENOMEM;
1240 goto out;
1241 }
1242 INIT_LIST_HEAD(&map->list);
1243 map->guest_addr = addr;
1244 map->addr = gmap_translate(addr, kvm->arch.gmap);
1245 if (map->addr == -EFAULT) {
1246 ret = -EFAULT;
1247 goto out;
1248 }
1249 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1250 if (ret < 0)
1251 goto out;
1252 BUG_ON(ret != 1);
1253 down_write(&adapter->maps_lock);
1254 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1255 list_add_tail(&map->list, &adapter->maps);
1256 ret = 0;
1257 } else {
1258 put_page(map->page);
1259 ret = -EINVAL;
1260 }
1261 up_write(&adapter->maps_lock);
1262out:
1263 if (ret)
1264 kfree(map);
1265 return ret;
1266}
1267
1268static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1269{
1270 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1271 struct s390_map_info *map, *tmp;
1272 int found = 0;
1273
1274 if (!adapter || !addr)
1275 return -EINVAL;
1276
1277 down_write(&adapter->maps_lock);
1278 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1279 if (map->guest_addr == addr) {
1280 found = 1;
1281 atomic_dec(&adapter->nr_maps);
1282 list_del(&map->list);
1283 put_page(map->page);
1284 kfree(map);
1285 break;
1286 }
1287 }
1288 up_write(&adapter->maps_lock);
1289
1290 return found ? 0 : -EINVAL;
1291}
1292
1293void kvm_s390_destroy_adapters(struct kvm *kvm)
1294{
1295 int i;
1296 struct s390_map_info *map, *tmp;
1297
1298 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1299 if (!kvm->arch.adapters[i])
1300 continue;
1301 list_for_each_entry_safe(map, tmp,
1302 &kvm->arch.adapters[i]->maps, list) {
1303 list_del(&map->list);
1304 put_page(map->page);
1305 kfree(map);
1306 }
1307 kfree(kvm->arch.adapters[i]);
1308 }
1309}
1310
1311static int modify_io_adapter(struct kvm_device *dev,
1312 struct kvm_device_attr *attr)
1313{
1314 struct kvm_s390_io_adapter_req req;
1315 struct s390_io_adapter *adapter;
1316 int ret;
1317
1318 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1319 return -EFAULT;
1320
1321 adapter = get_io_adapter(dev->kvm, req.id);
1322 if (!adapter)
1323 return -EINVAL;
1324 switch (req.type) {
1325 case KVM_S390_IO_ADAPTER_MASK:
1326 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1327 if (ret > 0)
1328 ret = 0;
1329 break;
1330 case KVM_S390_IO_ADAPTER_MAP:
1331 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1332 break;
1333 case KVM_S390_IO_ADAPTER_UNMAP:
1334 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1335 break;
1336 default:
1337 ret = -EINVAL;
1338 }
1339
1340 return ret;
1341}
1342
c05c4186
JF		 1343static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1344{
1345 int r = 0;
3c038e6b
DD		 1346 unsigned int i;
1347 struct kvm_vcpu *vcpu;
c05c4186
JF		 1348
1349 switch (attr->group) {
1350 case KVM_DEV_FLIC_ENQUEUE:
1351 r = enqueue_floating_irq(dev, attr);
1352 break;
1353 case KVM_DEV_FLIC_CLEAR_IRQS:
1354 r = 0;
67335e63 1355 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 1356 break;
3c038e6b
DD		 1357 case KVM_DEV_FLIC_APF_ENABLE:
1358 dev->kvm->arch.gmap->pfault_enabled = 1;
1359 break;
1360 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1361 dev->kvm->arch.gmap->pfault_enabled = 0;
1362 /*
1363 * Make sure no async faults are in transition when
1364 * clearing the queues. So we don't need to worry
1365 * about late coming workers.
1366 */
1367 synchronize_srcu(&dev->kvm->srcu);
1368 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1369 kvm_clear_async_pf_completion_queue(vcpu);
1370 break;
841b91c5
CH		 1371 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1372 r = register_io_adapter(dev, attr);
1373 break;
1374 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1375 r = modify_io_adapter(dev, attr);
1376 break;
c05c4186
JF		 1377 default:
1378 r = -EINVAL;
1379 }
1380
1381 return r;
1382}
1383
1384static int flic_create(struct kvm_device *dev, u32 type)
1385{
1386 if (!dev)
1387 return -EINVAL;
1388 if (dev->kvm->arch.flic)
1389 return -EINVAL;
1390 dev->kvm->arch.flic = dev;
1391 return 0;
1392}
1393
1394static void flic_destroy(struct kvm_device *dev)
1395{
1396 dev->kvm->arch.flic = NULL;
1397 kfree(dev);
1398}
1399
1400/* s390 floating irq controller (flic) */
1401struct kvm_device_ops kvm_flic_ops = {
1402 .name = "kvm-flic",
1403 .get_attr = flic_get_attr,
1404 .set_attr = flic_set_attr,
1405 .create = flic_create,
1406 .destroy = flic_destroy,
1407};
84223598
CH		 1408
1409static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
1410{
1411 unsigned long bit;
1412
1413 bit = bit_nr + (addr % PAGE_SIZE) * 8;
1414
1415 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
1416}
1417
1418static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
1419 u64 addr)
1420{
1421 struct s390_map_info *map;
1422
1423 if (!adapter)
1424 return NULL;
1425
1426 list_for_each_entry(map, &adapter->maps, list) {
1427 if (map->guest_addr == addr)
1428 return map;
1429 }
1430 return NULL;
1431}
1432
1433static int adapter_indicators_set(struct kvm *kvm,
1434 struct s390_io_adapter *adapter,
1435 struct kvm_s390_adapter_int *adapter_int)
1436{
1437 unsigned long bit;
1438 int summary_set, idx;
1439 struct s390_map_info *info;
1440 void *map;
1441
1442 info = get_map_info(adapter, adapter_int->ind_addr);
1443 if (!info)
1444 return -1;
1445 map = page_address(info->page);
1446 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
1447 set_bit(bit, map);
1448 idx = srcu_read_lock(&kvm->srcu);
1449 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1450 set_page_dirty_lock(info->page);
1451 info = get_map_info(adapter, adapter_int->summary_addr);
1452 if (!info) {
1453 srcu_read_unlock(&kvm->srcu, idx);
1454 return -1;
1455 }
1456 map = page_address(info->page);
1457 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
1458 adapter->swap);
1459 summary_set = test_and_set_bit(bit, map);
1460 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1461 set_page_dirty_lock(info->page);
1462 srcu_read_unlock(&kvm->srcu, idx);
1463 return summary_set ? 0 : 1;
1464}
1465
1466/*
1467 * < 0 - not injected due to error
1468 * = 0 - coalesced, summary indicator already active
1469 * > 0 - injected interrupt
1470 */
1471static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
1472 struct kvm *kvm, int irq_source_id, int level,
1473 bool line_status)
1474{
1475 int ret;
1476 struct s390_io_adapter *adapter;
1477
1478 /* We're only interested in the 0->1 transition. */
1479 if (!level)
1480 return 0;
1481 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
1482 if (!adapter)
1483 return -1;
1484 down_read(&adapter->maps_lock);
1485 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
1486 up_read(&adapter->maps_lock);
1487 if ((ret > 0) && !adapter->masked) {
1488 struct kvm_s390_interrupt s390int = {
1489 .type = KVM_S390_INT_IO(1, 0, 0, 0),
1490 .parm = 0,
1491 .parm64 = (adapter->isc << 27) | 0x80000000,
1492 };
1493 ret = kvm_s390_inject_vm(kvm, &s390int);
1494 if (ret == 0)
1495 ret = 1;
1496 }
1497 return ret;
1498}
1499
8ba918d4 1500int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 1501 const struct kvm_irq_routing_entry *ue)
1502{
1503 int ret;
1504
1505 switch (ue->type) {
1506 case KVM_IRQ_ROUTING_S390_ADAPTER:
1507 e->set = set_adapter_int;
1508 e->adapter.summary_addr = ue->u.adapter.summary_addr;
1509 e->adapter.ind_addr = ue->u.adapter.ind_addr;
1510 e->adapter.summary_offset = ue->u.adapter.summary_offset;
1511 e->adapter.ind_offset = ue->u.adapter.ind_offset;
1512 e->adapter.adapter_id = ue->u.adapter.adapter_id;
1513 ret = 0;
1514 break;
1515 default:
1516 ret = -EINVAL;
1517 }
1518
1519 return ret;
1520}
1521
1522int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
1523 int irq_source_id, int level, bool line_status)
1524{
1525 return -EINVAL;
1526}
Linux kernel - Deliverables
This page took 0.43904 seconds and 5 git commands to generate.