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KVM: s390: add defines for virtio and pfault interrupt code
[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
60f90a14
JF		 30#define PFAULT_DONE 0x0680
31#define VIRTIO_PARAM 0x0d00
d8346b7d 32
614aeab4 33static int __must_check deliver_ckc_interrupt(struct kvm_vcpu *vcpu);
e029ae5b 34
d8346b7d
CH		 35static int is_ioint(u64 type)
36{
37 return ((type & 0xfffe0000u) != 0xfffe0000u);
38}
39
3c038e6b 40int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 41{
42 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
43}
44
d8346b7d
CH		 45static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
46{
47 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
48}
49
48a3e950
CH		 50static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
51{
52 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
53}
54
ba5c1e9b
CO		 55static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
56{
57 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
58 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
59 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
60 return 0;
61 return 1;
62}
63
bb78c5ec
DH		 64static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
65{
66 if (psw_extint_disabled(vcpu) ||
67 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
68 return 0;
f71d0dc5
DH		 69 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
70 /* No timer interrupts when single stepping */
71 return 0;
bb78c5ec
DH		 72 return 1;
73}
74
79fd50c6
CH		 75static u64 int_word_to_isc_bits(u32 int_word)
76{
77 u8 isc = (int_word & 0x38000000) >> 27;
78
79 return (0x80 >> isc) << 24;
80}
81
614aeab4 82static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
180c12fb 83 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 84{
85 switch (inti->type) {
7697e71f
CE		 86 case KVM_S390_INT_EXTERNAL_CALL:
87 if (psw_extint_disabled(vcpu))
88 return 0;
89 if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
90 return 1;
f346026e 91 return 0;
ba5c1e9b
CO		 92 case KVM_S390_INT_EMERGENCY:
93 if (psw_extint_disabled(vcpu))
94 return 0;
95 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
96 return 1;
97 return 0;
e029ae5b
TH		 98 case KVM_S390_INT_CLOCK_COMP:
99 return ckc_interrupts_enabled(vcpu);
100 case KVM_S390_INT_CPU_TIMER:
101 if (psw_extint_disabled(vcpu))
102 return 0;
103 if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
104 return 1;
105 return 0;
ba5c1e9b 106 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 107 case KVM_S390_INT_PFAULT_INIT:
108 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 109 case KVM_S390_INT_VIRTIO:
110 if (psw_extint_disabled(vcpu))
111 return 0;
112 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
113 return 1;
114 return 0;
115 case KVM_S390_PROGRAM_INT:
116 case KVM_S390_SIGP_STOP:
117 case KVM_S390_SIGP_SET_PREFIX:
118 case KVM_S390_RESTART:
119 return 1;
48a3e950
CH		 120 case KVM_S390_MCHK:
121 if (psw_mchk_disabled(vcpu))
122 return 0;
123 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
124 return 1;
125 return 0;
d8346b7d
CH		 126 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
127 if (psw_ioint_disabled(vcpu))
128 return 0;
79fd50c6
CH		 129 if (vcpu->arch.sie_block->gcr[6] &
130 int_word_to_isc_bits(inti->io.io_int_word))
d8346b7d
CH		 131 return 1;
132 return 0;
ba5c1e9b 133 default:
d8346b7d
CH		 134 printk(KERN_WARNING "illegal interrupt type %llx\n",
135 inti->type);
ba5c1e9b
CO		 136 BUG();
137 }
138 return 0;
139}
140
141static void __set_cpu_idle(struct kvm_vcpu *vcpu)
142{
ba5c1e9b
CO		 143 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
144 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
145}
146
147static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
148{
ba5c1e9b
CO		 149 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
150 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
151}
152
153static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
154{
4953919f
DH		 155 atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
156 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 157 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 158 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
159
160 if (guestdbg_enabled(vcpu)) {
161 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
162 LCTL_CR10 | LCTL_CR11);
163 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
164 }
db373861
DH		 165
166 if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP)
167 atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 168}
169
170static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
171{
172 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
173}
174
175static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
180c12fb 176 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 177{
178 switch (inti->type) {
7697e71f 179 case KVM_S390_INT_EXTERNAL_CALL:
ba5c1e9b
CO		 180 case KVM_S390_INT_EMERGENCY:
181 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 182 case KVM_S390_INT_PFAULT_INIT:
183 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b 184 case KVM_S390_INT_VIRTIO:
e029ae5b
TH		 185 case KVM_S390_INT_CLOCK_COMP:
186 case KVM_S390_INT_CPU_TIMER:
ba5c1e9b
CO		 187 if (psw_extint_disabled(vcpu))
188 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
189 else
190 vcpu->arch.sie_block->lctl |= LCTL_CR0;
191 break;
192 case KVM_S390_SIGP_STOP:
193 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
194 break;
48a3e950
CH		 195 case KVM_S390_MCHK:
196 if (psw_mchk_disabled(vcpu))
197 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
198 else
199 vcpu->arch.sie_block->lctl |= LCTL_CR14;
200 break;
d8346b7d
CH		 201 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
202 if (psw_ioint_disabled(vcpu))
203 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
204 else
205 vcpu->arch.sie_block->lctl |= LCTL_CR6;
206 break;
ba5c1e9b
CO		 207 default:
208 BUG();
209 }
210}
211
8a2ef71b
JF		 212static u16 get_ilc(struct kvm_vcpu *vcpu)
213{
214 const unsigned short table[] = { 2, 4, 4, 6 };
215
216 switch (vcpu->arch.sie_block->icptcode) {
217 case ICPT_INST:
218 case ICPT_INSTPROGI:
219 case ICPT_OPEREXC:
220 case ICPT_PARTEXEC:
221 case ICPT_IOINST:
222 /* last instruction only stored for these icptcodes */
223 return table[vcpu->arch.sie_block->ipa >> 14];
224 case ICPT_PROGI:
225 return vcpu->arch.sie_block->pgmilc;
226 default:
227 return 0;
228 }
229}
230
614aeab4 231static int __must_check __deliver_prog_irq(struct kvm_vcpu *vcpu,
8712836b
DH		 232 struct kvm_s390_pgm_info *pgm_info)
233{
8712836b 234 int rc = 0;
8a2ef71b 235 u16 ilc = get_ilc(vcpu);
8712836b
DH		 236
237 switch (pgm_info->code & ~PGM_PER) {
238 case PGM_AFX_TRANSLATION:
239 case PGM_ASX_TRANSLATION:
240 case PGM_EX_TRANSLATION:
241 case PGM_LFX_TRANSLATION:
242 case PGM_LSTE_SEQUENCE:
243 case PGM_LSX_TRANSLATION:
244 case PGM_LX_TRANSLATION:
245 case PGM_PRIMARY_AUTHORITY:
246 case PGM_SECONDARY_AUTHORITY:
247 case PGM_SPACE_SWITCH:
248 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
249 (u64 *)__LC_TRANS_EXC_CODE);
250 break;
251 case PGM_ALEN_TRANSLATION:
252 case PGM_ALE_SEQUENCE:
253 case PGM_ASTE_INSTANCE:
254 case PGM_ASTE_SEQUENCE:
255 case PGM_ASTE_VALIDITY:
256 case PGM_EXTENDED_AUTHORITY:
257 rc = put_guest_lc(vcpu, pgm_info->exc_access_id,
258 (u8 *)__LC_EXC_ACCESS_ID);
259 break;
260 case PGM_ASCE_TYPE:
261 case PGM_PAGE_TRANSLATION:
262 case PGM_REGION_FIRST_TRANS:
263 case PGM_REGION_SECOND_TRANS:
264 case PGM_REGION_THIRD_TRANS:
265 case PGM_SEGMENT_TRANSLATION:
266 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
267 (u64 *)__LC_TRANS_EXC_CODE);
268 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
269 (u8 *)__LC_EXC_ACCESS_ID);
270 rc |= put_guest_lc(vcpu, pgm_info->op_access_id,
271 (u8 *)__LC_OP_ACCESS_ID);
272 break;
273 case PGM_MONITOR:
274 rc = put_guest_lc(vcpu, pgm_info->mon_class_nr,
a36c5393 275 (u16 *)__LC_MON_CLASS_NR);
8712836b
DH		 276 rc |= put_guest_lc(vcpu, pgm_info->mon_code,
277 (u64 *)__LC_MON_CODE);
278 break;
279 case PGM_DATA:
280 rc = put_guest_lc(vcpu, pgm_info->data_exc_code,
281 (u32 *)__LC_DATA_EXC_CODE);
282 break;
283 case PGM_PROTECTION:
284 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
285 (u64 *)__LC_TRANS_EXC_CODE);
286 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
287 (u8 *)__LC_EXC_ACCESS_ID);
288 break;
289 }
290
291 if (pgm_info->code & PGM_PER) {
292 rc |= put_guest_lc(vcpu, pgm_info->per_code,
293 (u8 *) __LC_PER_CODE);
294 rc |= put_guest_lc(vcpu, pgm_info->per_atmid,
295 (u8 *)__LC_PER_ATMID);
296 rc |= put_guest_lc(vcpu, pgm_info->per_address,
297 (u64 *) __LC_PER_ADDRESS);
298 rc |= put_guest_lc(vcpu, pgm_info->per_access_id,
299 (u8 *) __LC_PER_ACCESS_ID);
300 }
301
8a2ef71b 302 rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
8712836b
DH		 303 rc |= put_guest_lc(vcpu, pgm_info->code,
304 (u16 *)__LC_PGM_INT_CODE);
305 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
306 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
307 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
308 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
309
310 return rc;
311}
312
614aeab4 313static int __must_check __do_deliver_interrupt(struct kvm_vcpu *vcpu,
180c12fb 314 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 315{
316 const unsigned short table[] = { 2, 4, 4, 6 };
dc5008b9 317 int rc = 0;
ba5c1e9b
CO		 318
319 switch (inti->type) {
320 case KVM_S390_INT_EMERGENCY:
321 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
322 vcpu->stat.deliver_emergency_signal++;
ade38c31
CH		 323 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
324 inti->emerg.code, 0);
1a03b764
JF		 325 rc = put_guest_lc(vcpu, 0x1201, (u16 *)__LC_EXT_INT_CODE);
326 rc |= put_guest_lc(vcpu, inti->emerg.code,
327 (u16 *)__LC_EXT_CPU_ADDR);
328 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
329 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
330 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 331 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ba5c1e9b 332 break;
7697e71f
CE		 333 case KVM_S390_INT_EXTERNAL_CALL:
334 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
335 vcpu->stat.deliver_external_call++;
ade38c31
CH		 336 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
337 inti->extcall.code, 0);
1a03b764
JF		 338 rc = put_guest_lc(vcpu, 0x1202, (u16 *)__LC_EXT_INT_CODE);
339 rc |= put_guest_lc(vcpu, inti->extcall.code,
340 (u16 *)__LC_EXT_CPU_ADDR);
341 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
342 &vcpu->arch.sie_block->gpsw,
343 sizeof(psw_t));
344 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
345 &vcpu->arch.sie_block->gpsw,
346 sizeof(psw_t));
7697e71f 347 break;
e029ae5b
TH		 348 case KVM_S390_INT_CLOCK_COMP:
349 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
af43eb2f 350 0, 0);
79395031 351 rc = deliver_ckc_interrupt(vcpu);
e029ae5b
TH		 352 break;
353 case KVM_S390_INT_CPU_TIMER:
354 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
af43eb2f 355 0, 0);
e029ae5b
TH		 356 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
357 (u16 *)__LC_EXT_INT_CODE);
358 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
359 &vcpu->arch.sie_block->gpsw,
360 sizeof(psw_t));
361 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
362 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
e029ae5b 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 395 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
60f90a14 396 rc |= put_guest_lc(vcpu, PFAULT_DONE, (u16 *)__LC_EXT_CPU_ADDR);
7988276d
HC		 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 412 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
60f90a14 413 rc |= put_guest_lc(vcpu, VIRTIO_PARAM, (u16 *)__LC_EXT_CPU_ADDR);
7988276d
HC		 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
0146a7b0
JF		 722static int __inject_prog_irq(struct kvm_vcpu *vcpu,
723 struct kvm_s390_interrupt_info *inti)
724{
725 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
726
727 list_add(&inti->list, &li->list);
728 atomic_set(&li->active, 1);
729 return 0;
730}
731
ba5c1e9b
CO		 732int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
733{
180c12fb
CB		 734 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
735 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 736
737 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
738 if (!inti)
739 return -ENOMEM;
740
a419aef8 741 inti->type = KVM_S390_PROGRAM_INT;
ba5c1e9b
CO		 742 inti->pgm.code = code;
743
744 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
ade38c31 745 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, inti->type, code, 0, 1);
4ae3c081 746 spin_lock(&li->lock);
ba5c1e9b
CO		 747 list_add(&inti->list, &li->list);
748 atomic_set(&li->active, 1);
d0321a24 749 BUG_ON(waitqueue_active(li->wq));
4ae3c081 750 spin_unlock(&li->lock);
bcd84683
JF		 751 return 0;
752}
753
754int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
755 struct kvm_s390_pgm_info *pgm_info)
756{
757 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
758 struct kvm_s390_interrupt_info *inti;
0146a7b0 759 int rc;
bcd84683
JF		 760
761 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
762 if (!inti)
763 return -ENOMEM;
764
765 VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
766 pgm_info->code);
767 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
768 pgm_info->code, 0, 1);
769
770 inti->type = KVM_S390_PROGRAM_INT;
771 memcpy(&inti->pgm, pgm_info, sizeof(inti->pgm));
4ae3c081 772 spin_lock(&li->lock);
0146a7b0 773 rc = __inject_prog_irq(vcpu, inti);
bcd84683 774 BUG_ON(waitqueue_active(li->wq));
4ae3c081 775 spin_unlock(&li->lock);
0146a7b0
JF		 776 return rc;
777}
778
779static int __inject_pfault_init(struct kvm_vcpu *vcpu,
780 struct kvm_s390_interrupt *s390int,
781 struct kvm_s390_interrupt_info *inti)
782{
783 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
784
785 inti->ext.ext_params2 = s390int->parm64;
786 list_add_tail(&inti->list, &li->list);
787 atomic_set(&li->active, 1);
788 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
789 return 0;
790}
791
792static int __inject_extcall(struct kvm_vcpu *vcpu,
793 struct kvm_s390_interrupt *s390int,
794 struct kvm_s390_interrupt_info *inti)
795{
796 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
797
798 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
799 s390int->parm);
800 if (s390int->parm & 0xffff0000)
801 return -EINVAL;
802 inti->extcall.code = s390int->parm;
803 list_add_tail(&inti->list, &li->list);
804 atomic_set(&li->active, 1);
805 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
806 return 0;
807}
808
809static int __inject_set_prefix(struct kvm_vcpu *vcpu,
810 struct kvm_s390_interrupt *s390int,
811 struct kvm_s390_interrupt_info *inti)
812{
813 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
814
815 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
816 s390int->parm);
817 inti->prefix.address = s390int->parm;
818 list_add_tail(&inti->list, &li->list);
819 atomic_set(&li->active, 1);
820 return 0;
821}
822
823static int __inject_sigp_stop(struct kvm_vcpu *vcpu,
824 struct kvm_s390_interrupt *s390int,
825 struct kvm_s390_interrupt_info *inti)
826{
827 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
828
829 list_add_tail(&inti->list, &li->list);
830 atomic_set(&li->active, 1);
831 li->action_bits |= ACTION_STOP_ON_STOP;
832 return 0;
833}
834
835static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
836 struct kvm_s390_interrupt *s390int,
837 struct kvm_s390_interrupt_info *inti)
838{
839 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
840
841 VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
842 list_add_tail(&inti->list, &li->list);
843 atomic_set(&li->active, 1);
844 return 0;
845}
846
847static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
848 struct kvm_s390_interrupt *s390int,
849 struct kvm_s390_interrupt_info *inti)
850{
851 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
852
853 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm);
854 if (s390int->parm & 0xffff0000)
855 return -EINVAL;
856 inti->emerg.code = s390int->parm;
857 list_add_tail(&inti->list, &li->list);
858 atomic_set(&li->active, 1);
859 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
860 return 0;
861}
862
863static int __inject_mchk(struct kvm_vcpu *vcpu,
864 struct kvm_s390_interrupt *s390int,
865 struct kvm_s390_interrupt_info *inti)
866{
867 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
868
869 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
870 s390int->parm64);
871 inti->mchk.mcic = s390int->parm64;
872 list_add_tail(&inti->list, &li->list);
873 atomic_set(&li->active, 1);
874 return 0;
875}
876
877static int __inject_ckc(struct kvm_vcpu *vcpu,
878 struct kvm_s390_interrupt *s390int,
879 struct kvm_s390_interrupt_info *inti)
880{
881 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
882
883 VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
884 list_add_tail(&inti->list, &li->list);
885 atomic_set(&li->active, 1);
886 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
887 return 0;
888}
889
890static int __inject_cpu_timer(struct kvm_vcpu *vcpu,
891 struct kvm_s390_interrupt *s390int,
892 struct kvm_s390_interrupt_info *inti)
893{
894 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
895
896 VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
897 list_add_tail(&inti->list, &li->list);
898 atomic_set(&li->active, 1);
899 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
ba5c1e9b
CO		 900 return 0;
901}
902
fa6b7fe9
CH		 903struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
904 u64 cr6, u64 schid)
905{
906 struct kvm_s390_float_interrupt *fi;
907 struct kvm_s390_interrupt_info *inti, *iter;
908
909 if ((!schid && !cr6) || (schid && cr6))
910 return NULL;
911 mutex_lock(&kvm->lock);
912 fi = &kvm->arch.float_int;
913 spin_lock(&fi->lock);
914 inti = NULL;
915 list_for_each_entry(iter, &fi->list, list) {
916 if (!is_ioint(iter->type))
917 continue;
79fd50c6
CH		 918 if (cr6 &&
919 ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
fa6b7fe9
CH		 920 continue;
921 if (schid) {
922 if (((schid & 0x00000000ffff0000) >> 16) !=
923 iter->io.subchannel_id)
924 continue;
925 if ((schid & 0x000000000000ffff) !=
926 iter->io.subchannel_nr)
927 continue;
928 }
929 inti = iter;
930 break;
931 }
a91b8ebe 932 if (inti) {
fa6b7fe9 933 list_del_init(&inti->list);
a91b8ebe
JF		 934 fi->irq_count--;
935 }
fa6b7fe9
CH		 936 if (list_empty(&fi->list))
937 atomic_set(&fi->active, 0);
938 spin_unlock(&fi->lock);
939 mutex_unlock(&kvm->lock);
940 return inti;
941}
ba5c1e9b 942
a91b8ebe 943static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
ba5c1e9b 944{
180c12fb
CB		 945 struct kvm_s390_local_interrupt *li;
946 struct kvm_s390_float_interrupt *fi;
c05c4186 947 struct kvm_s390_interrupt_info *iter;
1ee0bc55 948 struct kvm_vcpu *dst_vcpu = NULL;
ba5c1e9b 949 int sigcpu;
a91b8ebe 950 int rc = 0;
ba5c1e9b 951
c05c4186
JF		 952 mutex_lock(&kvm->lock);
953 fi = &kvm->arch.float_int;
954 spin_lock(&fi->lock);
a91b8ebe
JF		 955 if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
956 rc = -EINVAL;
957 goto unlock_fi;
958 }
959 fi->irq_count++;
c05c4186
JF		 960 if (!is_ioint(inti->type)) {
961 list_add_tail(&inti->list, &fi->list);
962 } else {
963 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
964
965 /* Keep I/O interrupts sorted in isc order. */
966 list_for_each_entry(iter, &fi->list, list) {
967 if (!is_ioint(iter->type))
968 continue;
969 if (int_word_to_isc_bits(iter->io.io_int_word)
970 <= isc_bits)
971 continue;
972 break;
973 }
974 list_add_tail(&inti->list, &iter->list);
975 }
976 atomic_set(&fi->active, 1);
977 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
978 if (sigcpu == KVM_MAX_VCPUS) {
979 do {
980 sigcpu = fi->next_rr_cpu++;
981 if (sigcpu == KVM_MAX_VCPUS)
982 sigcpu = fi->next_rr_cpu = 0;
1ee0bc55 983 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
c05c4186 984 }
1ee0bc55
JF		 985 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
986 li = &dst_vcpu->arch.local_int;
4ae3c081 987 spin_lock(&li->lock);
da00fcbd
CB		 988 switch (inti->type) {
989 case KVM_S390_MCHK:
990 atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
991 break;
992 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
993 atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
994 break;
995 default:
996 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
997 break;
998 }
4ae3c081 999 spin_unlock(&li->lock);
0e9c85a5 1000 kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
a91b8ebe 1001unlock_fi:
c05c4186
JF		 1002 spin_unlock(&fi->lock);
1003 mutex_unlock(&kvm->lock);
a91b8ebe 1004 return rc;
c05c4186
JF		 1005}
1006
1007int kvm_s390_inject_vm(struct kvm *kvm,
1008 struct kvm_s390_interrupt *s390int)
1009{
1010 struct kvm_s390_interrupt_info *inti;
1011
ba5c1e9b
CO		 1012 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1013 if (!inti)
1014 return -ENOMEM;
1015
c05c4186
JF		 1016 inti->type = s390int->type;
1017 switch (inti->type) {
ba5c1e9b 1018 case KVM_S390_INT_VIRTIO:
33e19115 1019 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1020 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1021 inti->ext.ext_params = s390int->parm;
1022 inti->ext.ext_params2 = s390int->parm64;
1023 break;
1024 case KVM_S390_INT_SERVICE:
1025 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1026 inti->ext.ext_params = s390int->parm;
1027 break;
3c038e6b
DD		 1028 case KVM_S390_INT_PFAULT_DONE:
1029 inti->type = s390int->type;
1030 inti->ext.ext_params2 = s390int->parm64;
1031 break;
48a3e950
CH		 1032 case KVM_S390_MCHK:
1033 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
1034 s390int->parm64);
48a3e950
CH		 1035 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1036 inti->mchk.mcic = s390int->parm64;
1037 break;
d8346b7d 1038 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
c05c4186 1039 if (inti->type & IOINT_AI_MASK)
d8346b7d
CH		 1040 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
1041 else
1042 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
1043 s390int->type & IOINT_CSSID_MASK,
1044 s390int->type & IOINT_SSID_MASK,
1045 s390int->type & IOINT_SCHID_MASK);
d8346b7d
CH		 1046 inti->io.subchannel_id = s390int->parm >> 16;
1047 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1048 inti->io.io_int_parm = s390int->parm64 >> 32;
1049 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1050 break;
ba5c1e9b
CO		 1051 default:
1052 kfree(inti);
1053 return -EINVAL;
1054 }
ade38c31
CH		 1055 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1056 2);
ba5c1e9b 1057
a91b8ebe 1058 return __inject_vm(kvm, inti);
ba5c1e9b
CO		 1059}
1060
2f32d4ea
CH		 1061void kvm_s390_reinject_io_int(struct kvm *kvm,
1062 struct kvm_s390_interrupt_info *inti)
1063{
1064 __inject_vm(kvm, inti);
1065}
1066
ba5c1e9b
CO		 1067int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
1068 struct kvm_s390_interrupt *s390int)
1069{
0146a7b0 1070 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
180c12fb 1071 struct kvm_s390_interrupt_info *inti;
0146a7b0 1072 int rc;
ba5c1e9b
CO		 1073
1074 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1075 if (!inti)
1076 return -ENOMEM;
1077
0146a7b0
JF		 1078 inti->type = s390int->type;
1079
1080 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type,
1081 s390int->parm, 0, 2);
1082 spin_lock(&li->lock);
1083 switch (inti->type) {
ba5c1e9b 1084 case KVM_S390_PROGRAM_INT:
ba5c1e9b
CO		 1085 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
1086 s390int->parm);
0146a7b0
JF		 1087 inti->pgm.code = s390int->parm;
1088 if (s390int->parm & 0xffff0000)
1089 rc = -EINVAL;
1090 else
1091 rc = __inject_prog_irq(vcpu, inti);
ba5c1e9b 1092 break;
b7e6e4d3 1093 case KVM_S390_SIGP_SET_PREFIX:
0146a7b0 1094 rc = __inject_set_prefix(vcpu, s390int, inti);
b7e6e4d3 1095 break;
ba5c1e9b 1096 case KVM_S390_SIGP_STOP:
0146a7b0
JF		 1097 rc = __inject_sigp_stop(vcpu, s390int, inti);
1098 break;
ba5c1e9b 1099 case KVM_S390_RESTART:
0146a7b0
JF		 1100 rc = __inject_sigp_restart(vcpu, s390int, inti);
1101 break;
e029ae5b 1102 case KVM_S390_INT_CLOCK_COMP:
0146a7b0
JF		 1103 rc = __inject_ckc(vcpu, s390int, inti);
1104 break;
e029ae5b 1105 case KVM_S390_INT_CPU_TIMER:
0146a7b0 1106 rc = __inject_cpu_timer(vcpu, s390int, inti);
82a12737 1107 break;
7697e71f 1108 case KVM_S390_INT_EXTERNAL_CALL:
0146a7b0 1109 rc = __inject_extcall(vcpu, s390int, inti);
82a12737 1110 break;
ba5c1e9b 1111 case KVM_S390_INT_EMERGENCY:
0146a7b0 1112 rc = __inject_sigp_emergency(vcpu, s390int, inti);
ba5c1e9b 1113 break;
48a3e950 1114 case KVM_S390_MCHK:
0146a7b0 1115 rc = __inject_mchk(vcpu, s390int, inti);
48a3e950 1116 break;
3c038e6b 1117 case KVM_S390_INT_PFAULT_INIT:
0146a7b0 1118 rc = __inject_pfault_init(vcpu, s390int, inti);
3c038e6b 1119 break;
ba5c1e9b
CO		 1120 case KVM_S390_INT_VIRTIO:
1121 case KVM_S390_INT_SERVICE:
d8346b7d 1122 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 1123 default:
0146a7b0 1124 rc = -EINVAL;
ba5c1e9b 1125 }
4ae3c081 1126 spin_unlock(&li->lock);
0146a7b0
JF		 1127 if (!rc)
1128 kvm_s390_vcpu_wakeup(vcpu);
1129 else
1130 kfree(inti);
1131 return rc;
ba5c1e9b 1132}
c05c4186 1133
67335e63 1134void kvm_s390_clear_float_irqs(struct kvm *kvm)
c05c4186
JF		 1135{
1136 struct kvm_s390_float_interrupt *fi;
1137 struct kvm_s390_interrupt_info *n, *inti = NULL;
1138
1139 mutex_lock(&kvm->lock);
1140 fi = &kvm->arch.float_int;
1141 spin_lock(&fi->lock);
1142 list_for_each_entry_safe(inti, n, &fi->list, list) {
1143 list_del(&inti->list);
1144 kfree(inti);
1145 }
a91b8ebe 1146 fi->irq_count = 0;
c05c4186
JF		 1147 atomic_set(&fi->active, 0);
1148 spin_unlock(&fi->lock);
1149 mutex_unlock(&kvm->lock);
1150}
1151
1152static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti,
1153 u8 *addr)
1154{
1155 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1156 struct kvm_s390_irq irq = {0};
1157
1158 irq.type = inti->type;
1159 switch (inti->type) {
3c038e6b
DD		 1160 case KVM_S390_INT_PFAULT_INIT:
1161 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1162 case KVM_S390_INT_VIRTIO:
1163 case KVM_S390_INT_SERVICE:
1164 irq.u.ext = inti->ext;
1165 break;
1166 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1167 irq.u.io = inti->io;
1168 break;
1169 case KVM_S390_MCHK:
1170 irq.u.mchk = inti->mchk;
1171 break;
1172 default:
1173 return -EINVAL;
1174 }
1175
1176 if (copy_to_user(uptr, &irq, sizeof(irq)))
1177 return -EFAULT;
1178
1179 return 0;
1180}
1181
1182static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len)
1183{
1184 struct kvm_s390_interrupt_info *inti;
1185 struct kvm_s390_float_interrupt *fi;
1186 int ret = 0;
1187 int n = 0;
1188
1189 mutex_lock(&kvm->lock);
1190 fi = &kvm->arch.float_int;
1191 spin_lock(&fi->lock);
1192
1193 list_for_each_entry(inti, &fi->list, list) {
1194 if (len < sizeof(struct kvm_s390_irq)) {
1195 /* signal userspace to try again */
1196 ret = -ENOMEM;
1197 break;
1198 }
1199 ret = copy_irq_to_user(inti, buf);
1200 if (ret)
1201 break;
1202 buf += sizeof(struct kvm_s390_irq);
1203 len -= sizeof(struct kvm_s390_irq);
1204 n++;
1205 }
1206
1207 spin_unlock(&fi->lock);
1208 mutex_unlock(&kvm->lock);
1209
1210 return ret < 0 ? ret : n;
1211}
1212
1213static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1214{
1215 int r;
1216
1217 switch (attr->group) {
1218 case KVM_DEV_FLIC_GET_ALL_IRQS:
1219 r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr,
1220 attr->attr);
1221 break;
1222 default:
1223 r = -EINVAL;
1224 }
1225
1226 return r;
1227}
1228
1229static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1230 u64 addr)
1231{
1232 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1233 void *target = NULL;
1234 void __user *source;
1235 u64 size;
1236
1237 if (get_user(inti->type, (u64 __user *)addr))
1238 return -EFAULT;
1239
1240 switch (inti->type) {
3c038e6b
DD		 1241 case KVM_S390_INT_PFAULT_INIT:
1242 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1243 case KVM_S390_INT_VIRTIO:
1244 case KVM_S390_INT_SERVICE:
1245 target = (void *) &inti->ext;
1246 source = &uptr->u.ext;
1247 size = sizeof(inti->ext);
1248 break;
1249 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1250 target = (void *) &inti->io;
1251 source = &uptr->u.io;
1252 size = sizeof(inti->io);
1253 break;
1254 case KVM_S390_MCHK:
1255 target = (void *) &inti->mchk;
1256 source = &uptr->u.mchk;
1257 size = sizeof(inti->mchk);
1258 break;
1259 default:
1260 return -EINVAL;
1261 }
1262
1263 if (copy_from_user(target, source, size))
1264 return -EFAULT;
1265
1266 return 0;
1267}
1268
1269static int enqueue_floating_irq(struct kvm_device *dev,
1270 struct kvm_device_attr *attr)
1271{
1272 struct kvm_s390_interrupt_info *inti = NULL;
1273 int r = 0;
1274 int len = attr->attr;
1275
1276 if (len % sizeof(struct kvm_s390_irq) != 0)
1277 return -EINVAL;
1278 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1279 return -EINVAL;
1280
1281 while (len >= sizeof(struct kvm_s390_irq)) {
1282 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1283 if (!inti)
1284 return -ENOMEM;
1285
1286 r = copy_irq_from_user(inti, attr->addr);
1287 if (r) {
1288 kfree(inti);
1289 return r;
1290 }
a91b8ebe
JF		 1291 r = __inject_vm(dev->kvm, inti);
1292 if (r) {
1293 kfree(inti);
1294 return r;
1295 }
c05c4186
JF		 1296 len -= sizeof(struct kvm_s390_irq);
1297 attr->addr += sizeof(struct kvm_s390_irq);
1298 }
1299
1300 return r;
1301}
1302
841b91c5
CH		 1303static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1304{
1305 if (id >= MAX_S390_IO_ADAPTERS)
1306 return NULL;
1307 return kvm->arch.adapters[id];
1308}
1309
1310static int register_io_adapter(struct kvm_device *dev,
1311 struct kvm_device_attr *attr)
1312{
1313 struct s390_io_adapter *adapter;
1314 struct kvm_s390_io_adapter adapter_info;
1315
1316 if (copy_from_user(&adapter_info,
1317 (void __user *)attr->addr, sizeof(adapter_info)))
1318 return -EFAULT;
1319
1320 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1321 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1322 return -EINVAL;
1323
1324 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1325 if (!adapter)
1326 return -ENOMEM;
1327
1328 INIT_LIST_HEAD(&adapter->maps);
1329 init_rwsem(&adapter->maps_lock);
1330 atomic_set(&adapter->nr_maps, 0);
1331 adapter->id = adapter_info.id;
1332 adapter->isc = adapter_info.isc;
1333 adapter->maskable = adapter_info.maskable;
1334 adapter->masked = false;
1335 adapter->swap = adapter_info.swap;
1336 dev->kvm->arch.adapters[adapter->id] = adapter;
1337
1338 return 0;
1339}
1340
1341int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1342{
1343 int ret;
1344 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1345
1346 if (!adapter || !adapter->maskable)
1347 return -EINVAL;
1348 ret = adapter->masked;
1349 adapter->masked = masked;
1350 return ret;
1351}
1352
1353static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1354{
1355 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1356 struct s390_map_info *map;
1357 int ret;
1358
1359 if (!adapter || !addr)
1360 return -EINVAL;
1361
1362 map = kzalloc(sizeof(*map), GFP_KERNEL);
1363 if (!map) {
1364 ret = -ENOMEM;
1365 goto out;
1366 }
1367 INIT_LIST_HEAD(&map->list);
1368 map->guest_addr = addr;
6e0a0431 1369 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 1370 if (map->addr == -EFAULT) {
1371 ret = -EFAULT;
1372 goto out;
1373 }
1374 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1375 if (ret < 0)
1376 goto out;
1377 BUG_ON(ret != 1);
1378 down_write(&adapter->maps_lock);
1379 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1380 list_add_tail(&map->list, &adapter->maps);
1381 ret = 0;
1382 } else {
1383 put_page(map->page);
1384 ret = -EINVAL;
1385 }
1386 up_write(&adapter->maps_lock);
1387out:
1388 if (ret)
1389 kfree(map);
1390 return ret;
1391}
1392
1393static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1394{
1395 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1396 struct s390_map_info *map, *tmp;
1397 int found = 0;
1398
1399 if (!adapter || !addr)
1400 return -EINVAL;
1401
1402 down_write(&adapter->maps_lock);
1403 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1404 if (map->guest_addr == addr) {
1405 found = 1;
1406 atomic_dec(&adapter->nr_maps);
1407 list_del(&map->list);
1408 put_page(map->page);
1409 kfree(map);
1410 break;
1411 }
1412 }
1413 up_write(&adapter->maps_lock);
1414
1415 return found ? 0 : -EINVAL;
1416}
1417
1418void kvm_s390_destroy_adapters(struct kvm *kvm)
1419{
1420 int i;
1421 struct s390_map_info *map, *tmp;
1422
1423 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1424 if (!kvm->arch.adapters[i])
1425 continue;
1426 list_for_each_entry_safe(map, tmp,
1427 &kvm->arch.adapters[i]->maps, list) {
1428 list_del(&map->list);
1429 put_page(map->page);
1430 kfree(map);
1431 }
1432 kfree(kvm->arch.adapters[i]);
1433 }
1434}
1435
1436static int modify_io_adapter(struct kvm_device *dev,
1437 struct kvm_device_attr *attr)
1438{
1439 struct kvm_s390_io_adapter_req req;
1440 struct s390_io_adapter *adapter;
1441 int ret;
1442
1443 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1444 return -EFAULT;
1445
1446 adapter = get_io_adapter(dev->kvm, req.id);
1447 if (!adapter)
1448 return -EINVAL;
1449 switch (req.type) {
1450 case KVM_S390_IO_ADAPTER_MASK:
1451 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1452 if (ret > 0)
1453 ret = 0;
1454 break;
1455 case KVM_S390_IO_ADAPTER_MAP:
1456 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1457 break;
1458 case KVM_S390_IO_ADAPTER_UNMAP:
1459 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1460 break;
1461 default:
1462 ret = -EINVAL;
1463 }
1464
1465 return ret;
1466}
1467
c05c4186
JF		 1468static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1469{
1470 int r = 0;
3c038e6b
DD		 1471 unsigned int i;
1472 struct kvm_vcpu *vcpu;
c05c4186
JF		 1473
1474 switch (attr->group) {
1475 case KVM_DEV_FLIC_ENQUEUE:
1476 r = enqueue_floating_irq(dev, attr);
1477 break;
1478 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 1479 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 1480 break;
3c038e6b
DD		 1481 case KVM_DEV_FLIC_APF_ENABLE:
1482 dev->kvm->arch.gmap->pfault_enabled = 1;
1483 break;
1484 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1485 dev->kvm->arch.gmap->pfault_enabled = 0;
1486 /*
1487 * Make sure no async faults are in transition when
1488 * clearing the queues. So we don't need to worry
1489 * about late coming workers.
1490 */
1491 synchronize_srcu(&dev->kvm->srcu);
1492 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1493 kvm_clear_async_pf_completion_queue(vcpu);
1494 break;
841b91c5
CH		 1495 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1496 r = register_io_adapter(dev, attr);
1497 break;
1498 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1499 r = modify_io_adapter(dev, attr);
1500 break;
c05c4186
JF		 1501 default:
1502 r = -EINVAL;
1503 }
1504
1505 return r;
1506}
1507
1508static int flic_create(struct kvm_device *dev, u32 type)
1509{
1510 if (!dev)
1511 return -EINVAL;
1512 if (dev->kvm->arch.flic)
1513 return -EINVAL;
1514 dev->kvm->arch.flic = dev;
1515 return 0;
1516}
1517
1518static void flic_destroy(struct kvm_device *dev)
1519{
1520 dev->kvm->arch.flic = NULL;
1521 kfree(dev);
1522}
1523
1524/* s390 floating irq controller (flic) */
1525struct kvm_device_ops kvm_flic_ops = {
1526 .name = "kvm-flic",
1527 .get_attr = flic_get_attr,
1528 .set_attr = flic_set_attr,
1529 .create = flic_create,
1530 .destroy = flic_destroy,
1531};
84223598
CH		 1532
1533static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
1534{
1535 unsigned long bit;
1536
1537 bit = bit_nr + (addr % PAGE_SIZE) * 8;
1538
1539 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
1540}
1541
1542static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
1543 u64 addr)
1544{
1545 struct s390_map_info *map;
1546
1547 if (!adapter)
1548 return NULL;
1549
1550 list_for_each_entry(map, &adapter->maps, list) {
1551 if (map->guest_addr == addr)
1552 return map;
1553 }
1554 return NULL;
1555}
1556
1557static int adapter_indicators_set(struct kvm *kvm,
1558 struct s390_io_adapter *adapter,
1559 struct kvm_s390_adapter_int *adapter_int)
1560{
1561 unsigned long bit;
1562 int summary_set, idx;
1563 struct s390_map_info *info;
1564 void *map;
1565
1566 info = get_map_info(adapter, adapter_int->ind_addr);
1567 if (!info)
1568 return -1;
1569 map = page_address(info->page);
1570 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
1571 set_bit(bit, map);
1572 idx = srcu_read_lock(&kvm->srcu);
1573 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1574 set_page_dirty_lock(info->page);
1575 info = get_map_info(adapter, adapter_int->summary_addr);
1576 if (!info) {
1577 srcu_read_unlock(&kvm->srcu, idx);
1578 return -1;
1579 }
1580 map = page_address(info->page);
1581 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
1582 adapter->swap);
1583 summary_set = test_and_set_bit(bit, map);
1584 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1585 set_page_dirty_lock(info->page);
1586 srcu_read_unlock(&kvm->srcu, idx);
1587 return summary_set ? 0 : 1;
1588}
1589
1590/*
1591 * < 0 - not injected due to error
1592 * = 0 - coalesced, summary indicator already active
1593 * > 0 - injected interrupt
1594 */
1595static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
1596 struct kvm *kvm, int irq_source_id, int level,
1597 bool line_status)
1598{
1599 int ret;
1600 struct s390_io_adapter *adapter;
1601
1602 /* We're only interested in the 0->1 transition. */
1603 if (!level)
1604 return 0;
1605 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
1606 if (!adapter)
1607 return -1;
1608 down_read(&adapter->maps_lock);
1609 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
1610 up_read(&adapter->maps_lock);
1611 if ((ret > 0) && !adapter->masked) {
1612 struct kvm_s390_interrupt s390int = {
1613 .type = KVM_S390_INT_IO(1, 0, 0, 0),
1614 .parm = 0,
1615 .parm64 = (adapter->isc << 27) | 0x80000000,
1616 };
1617 ret = kvm_s390_inject_vm(kvm, &s390int);
1618 if (ret == 0)
1619 ret = 1;
1620 }
1621 return ret;
1622}
1623
8ba918d4 1624int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 1625 const struct kvm_irq_routing_entry *ue)
1626{
1627 int ret;
1628
1629 switch (ue->type) {
1630 case KVM_IRQ_ROUTING_S390_ADAPTER:
1631 e->set = set_adapter_int;
1632 e->adapter.summary_addr = ue->u.adapter.summary_addr;
1633 e->adapter.ind_addr = ue->u.adapter.ind_addr;
1634 e->adapter.summary_offset = ue->u.adapter.summary_offset;
1635 e->adapter.ind_offset = ue->u.adapter.ind_offset;
1636 e->adapter.adapter_id = ue->u.adapter.adapter_id;
1637 ret = 0;
1638 break;
1639 default:
1640 ret = -EINVAL;
1641 }
1642
1643 return ret;
1644}
1645
1646int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
1647 int irq_source_id, int level, bool line_status)
1648{
1649 return -EINVAL;
1650}
Linux kernel - Deliverables
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