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KVM: s390: cleanup handle_wait by reusing kvm_vcpu_block
[mirror_ubuntu-jammy-kernel.git] / arch / s390 / kvm / interrupt.c
CommitLineData
ba5c1e9b 1/*
a53c8fab 2 * handling kvm guest interrupts
ba5c1e9b 3 *
841b91c5 4 * Copyright IBM Corp. 2008,2014
ba5c1e9b
CO		 5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License (version 2 only)
8 * as published by the Free Software Foundation.
9 *
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
11 */
12
ca872302 13#include <linux/interrupt.h>
ba5c1e9b 14#include <linux/kvm_host.h>
cbb870c8 15#include <linux/hrtimer.h>
84223598 16#include <linux/mmu_context.h>
3cd61299 17#include <linux/signal.h>
5a0e3ad6 18#include <linux/slab.h>
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
29
e029ae5b
TH		 30static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu);
31
d8346b7d
CH		 32static int is_ioint(u64 type)
33{
34 return ((type & 0xfffe0000u) != 0xfffe0000u);
35}
36
3c038e6b 37int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 38{
39 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
40}
41
d8346b7d
CH		 42static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
43{
44 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
45}
46
48a3e950
CH		 47static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
48{
49 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
50}
51
ba5c1e9b
CO		 52static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
53{
54 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
55 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
56 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
57 return 0;
58 return 1;
59}
60
bb78c5ec
DH		 61static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
62{
63 if (psw_extint_disabled(vcpu) ||
64 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
65 return 0;
f71d0dc5
DH		 66 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
67 /* No timer interrupts when single stepping */
68 return 0;
bb78c5ec
DH		 69 return 1;
70}
71
79fd50c6
CH		 72static u64 int_word_to_isc_bits(u32 int_word)
73{
74 u8 isc = (int_word & 0x38000000) >> 27;
75
76 return (0x80 >> isc) << 24;
77}
78
ba5c1e9b 79static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
180c12fb 80 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 81{
82 switch (inti->type) {
7697e71f
CE		 83 case KVM_S390_INT_EXTERNAL_CALL:
84 if (psw_extint_disabled(vcpu))
85 return 0;
86 if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
87 return 1;
ba5c1e9b
CO		 88 case KVM_S390_INT_EMERGENCY:
89 if (psw_extint_disabled(vcpu))
90 return 0;
91 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
92 return 1;
93 return 0;
e029ae5b
TH		 94 case KVM_S390_INT_CLOCK_COMP:
95 return ckc_interrupts_enabled(vcpu);
96 case KVM_S390_INT_CPU_TIMER:
97 if (psw_extint_disabled(vcpu))
98 return 0;
99 if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
100 return 1;
101 return 0;
ba5c1e9b 102 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 103 case KVM_S390_INT_PFAULT_INIT:
104 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 105 case KVM_S390_INT_VIRTIO:
106 if (psw_extint_disabled(vcpu))
107 return 0;
108 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
109 return 1;
110 return 0;
111 case KVM_S390_PROGRAM_INT:
112 case KVM_S390_SIGP_STOP:
113 case KVM_S390_SIGP_SET_PREFIX:
114 case KVM_S390_RESTART:
115 return 1;
48a3e950
CH		 116 case KVM_S390_MCHK:
117 if (psw_mchk_disabled(vcpu))
118 return 0;
119 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
120 return 1;
121 return 0;
d8346b7d
CH		 122 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
123 if (psw_ioint_disabled(vcpu))
124 return 0;
79fd50c6
CH		 125 if (vcpu->arch.sie_block->gcr[6] &
126 int_word_to_isc_bits(inti->io.io_int_word))
d8346b7d
CH		 127 return 1;
128 return 0;
ba5c1e9b 129 default:
d8346b7d
CH		 130 printk(KERN_WARNING "illegal interrupt type %llx\n",
131 inti->type);
ba5c1e9b
CO		 132 BUG();
133 }
134 return 0;
135}
136
137static void __set_cpu_idle(struct kvm_vcpu *vcpu)
138{
ba5c1e9b
CO		 139 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
140 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
141}
142
143static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
144{
ba5c1e9b
CO		 145 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
146 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
147}
148
149static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
150{
4953919f
DH		 151 atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
152 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 153 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 154 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
155
156 if (guestdbg_enabled(vcpu)) {
157 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
158 LCTL_CR10 | LCTL_CR11);
159 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
160 }
ba5c1e9b
CO		 161}
162
163static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
164{
165 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
166}
167
168static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
180c12fb 169 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 170{
171 switch (inti->type) {
7697e71f 172 case KVM_S390_INT_EXTERNAL_CALL:
ba5c1e9b
CO		 173 case KVM_S390_INT_EMERGENCY:
174 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 175 case KVM_S390_INT_PFAULT_INIT:
176 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b 177 case KVM_S390_INT_VIRTIO:
e029ae5b
TH		 178 case KVM_S390_INT_CLOCK_COMP:
179 case KVM_S390_INT_CPU_TIMER:
ba5c1e9b
CO		 180 if (psw_extint_disabled(vcpu))
181 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
182 else
183 vcpu->arch.sie_block->lctl |= LCTL_CR0;
184 break;
185 case KVM_S390_SIGP_STOP:
186 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
187 break;
48a3e950
CH		 188 case KVM_S390_MCHK:
189 if (psw_mchk_disabled(vcpu))
190 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
191 else
192 vcpu->arch.sie_block->lctl |= LCTL_CR14;
193 break;
d8346b7d
CH		 194 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
195 if (psw_ioint_disabled(vcpu))
196 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
197 else
198 vcpu->arch.sie_block->lctl |= LCTL_CR6;
199 break;
ba5c1e9b
CO		 200 default:
201 BUG();
202 }
203}
204
8712836b
DH		 205static int __deliver_prog_irq(struct kvm_vcpu *vcpu,
206 struct kvm_s390_pgm_info *pgm_info)
207{
208 const unsigned short table[] = { 2, 4, 4, 6 };
209 int rc = 0;
210
211 switch (pgm_info->code & ~PGM_PER) {
212 case PGM_AFX_TRANSLATION:
213 case PGM_ASX_TRANSLATION:
214 case PGM_EX_TRANSLATION:
215 case PGM_LFX_TRANSLATION:
216 case PGM_LSTE_SEQUENCE:
217 case PGM_LSX_TRANSLATION:
218 case PGM_LX_TRANSLATION:
219 case PGM_PRIMARY_AUTHORITY:
220 case PGM_SECONDARY_AUTHORITY:
221 case PGM_SPACE_SWITCH:
222 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
223 (u64 *)__LC_TRANS_EXC_CODE);
224 break;
225 case PGM_ALEN_TRANSLATION:
226 case PGM_ALE_SEQUENCE:
227 case PGM_ASTE_INSTANCE:
228 case PGM_ASTE_SEQUENCE:
229 case PGM_ASTE_VALIDITY:
230 case PGM_EXTENDED_AUTHORITY:
231 rc = put_guest_lc(vcpu, pgm_info->exc_access_id,
232 (u8 *)__LC_EXC_ACCESS_ID);
233 break;
234 case PGM_ASCE_TYPE:
235 case PGM_PAGE_TRANSLATION:
236 case PGM_REGION_FIRST_TRANS:
237 case PGM_REGION_SECOND_TRANS:
238 case PGM_REGION_THIRD_TRANS:
239 case PGM_SEGMENT_TRANSLATION:
240 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
241 (u64 *)__LC_TRANS_EXC_CODE);
242 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
243 (u8 *)__LC_EXC_ACCESS_ID);
244 rc |= put_guest_lc(vcpu, pgm_info->op_access_id,
245 (u8 *)__LC_OP_ACCESS_ID);
246 break;
247 case PGM_MONITOR:
248 rc = put_guest_lc(vcpu, pgm_info->mon_class_nr,
249 (u64 *)__LC_MON_CLASS_NR);
250 rc |= put_guest_lc(vcpu, pgm_info->mon_code,
251 (u64 *)__LC_MON_CODE);
252 break;
253 case PGM_DATA:
254 rc = put_guest_lc(vcpu, pgm_info->data_exc_code,
255 (u32 *)__LC_DATA_EXC_CODE);
256 break;
257 case PGM_PROTECTION:
258 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
259 (u64 *)__LC_TRANS_EXC_CODE);
260 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
261 (u8 *)__LC_EXC_ACCESS_ID);
262 break;
263 }
264
265 if (pgm_info->code & PGM_PER) {
266 rc |= put_guest_lc(vcpu, pgm_info->per_code,
267 (u8 *) __LC_PER_CODE);
268 rc |= put_guest_lc(vcpu, pgm_info->per_atmid,
269 (u8 *)__LC_PER_ATMID);
270 rc |= put_guest_lc(vcpu, pgm_info->per_address,
271 (u64 *) __LC_PER_ADDRESS);
272 rc |= put_guest_lc(vcpu, pgm_info->per_access_id,
273 (u8 *) __LC_PER_ACCESS_ID);
274 }
275
276 switch (vcpu->arch.sie_block->icptcode) {
277 case ICPT_INST:
278 case ICPT_INSTPROGI:
279 case ICPT_OPEREXC:
280 case ICPT_PARTEXEC:
281 case ICPT_IOINST:
282 /* last instruction only stored for these icptcodes */
283 rc |= put_guest_lc(vcpu, table[vcpu->arch.sie_block->ipa >> 14],
284 (u16 *) __LC_PGM_ILC);
285 break;
286 case ICPT_PROGI:
287 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->pgmilc,
288 (u16 *) __LC_PGM_ILC);
289 break;
290 default:
291 rc |= put_guest_lc(vcpu, 0,
292 (u16 *) __LC_PGM_ILC);
293 }
294
295 rc |= put_guest_lc(vcpu, pgm_info->code,
296 (u16 *)__LC_PGM_INT_CODE);
297 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
298 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
299 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
300 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
301
302 return rc;
303}
304
ba5c1e9b 305static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
180c12fb 306 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 307{
308 const unsigned short table[] = { 2, 4, 4, 6 };
dc5008b9 309 int rc = 0;
ba5c1e9b
CO		 310
311 switch (inti->type) {
312 case KVM_S390_INT_EMERGENCY:
313 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
314 vcpu->stat.deliver_emergency_signal++;
ade38c31
CH		 315 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
316 inti->emerg.code, 0);
1a03b764
JF		 317 rc = put_guest_lc(vcpu, 0x1201, (u16 *)__LC_EXT_INT_CODE);
318 rc |= put_guest_lc(vcpu, inti->emerg.code,
319 (u16 *)__LC_EXT_CPU_ADDR);
320 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
321 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
322 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 323 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
ba5c1e9b 324 break;
7697e71f
CE		 325 case KVM_S390_INT_EXTERNAL_CALL:
326 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
327 vcpu->stat.deliver_external_call++;
ade38c31
CH		 328 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
329 inti->extcall.code, 0);
1a03b764
JF		 330 rc = put_guest_lc(vcpu, 0x1202, (u16 *)__LC_EXT_INT_CODE);
331 rc |= put_guest_lc(vcpu, inti->extcall.code,
332 (u16 *)__LC_EXT_CPU_ADDR);
333 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
334 &vcpu->arch.sie_block->gpsw,
335 sizeof(psw_t));
336 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
337 &vcpu->arch.sie_block->gpsw,
338 sizeof(psw_t));
7697e71f 339 break;
e029ae5b
TH		 340 case KVM_S390_INT_CLOCK_COMP:
341 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
342 inti->ext.ext_params, 0);
343 deliver_ckc_interrupt(vcpu);
344 break;
345 case KVM_S390_INT_CPU_TIMER:
346 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
347 inti->ext.ext_params, 0);
348 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
349 (u16 *)__LC_EXT_INT_CODE);
350 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
351 &vcpu->arch.sie_block->gpsw,
352 sizeof(psw_t));
353 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
354 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
355 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
356 (u32 *)__LC_EXT_PARAMS);
357 break;
ba5c1e9b
CO		 358 case KVM_S390_INT_SERVICE:
359 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
360 inti->ext.ext_params);
361 vcpu->stat.deliver_service_signal++;
ade38c31
CH		 362 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
363 inti->ext.ext_params, 0);
7988276d
HC		 364 rc = put_guest_lc(vcpu, 0x2401, (u16 *)__LC_EXT_INT_CODE);
365 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
366 &vcpu->arch.sie_block->gpsw,
367 sizeof(psw_t));
368 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 369 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
7988276d
HC		 370 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
371 (u32 *)__LC_EXT_PARAMS);
ba5c1e9b 372 break;
3c038e6b
DD		 373 case KVM_S390_INT_PFAULT_INIT:
374 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
375 inti->ext.ext_params2);
1a03b764
JF		 376 rc = put_guest_lc(vcpu, 0x2603, (u16 *) __LC_EXT_INT_CODE);
377 rc |= put_guest_lc(vcpu, 0x0600, (u16 *) __LC_EXT_CPU_ADDR);
378 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
379 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
380 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
3c038e6b 381 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
1a03b764
JF		 382 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
383 (u64 *) __LC_EXT_PARAMS2);
3c038e6b
DD		 384 break;
385 case KVM_S390_INT_PFAULT_DONE:
386 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
387 inti->ext.ext_params2);
7988276d
HC		 388 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
389 rc |= put_guest_lc(vcpu, 0x0680, (u16 *)__LC_EXT_CPU_ADDR);
390 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
391 &vcpu->arch.sie_block->gpsw,
392 sizeof(psw_t));
393 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
3c038e6b 394 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
7988276d
HC		 395 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
396 (u64 *)__LC_EXT_PARAMS2);
3c038e6b 397 break;
ba5c1e9b 398 case KVM_S390_INT_VIRTIO:
33e19115 399 VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
ba5c1e9b
CO		 400 inti->ext.ext_params, inti->ext.ext_params2);
401 vcpu->stat.deliver_virtio_interrupt++;
ade38c31
CH		 402 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
403 inti->ext.ext_params,
404 inti->ext.ext_params2);
7988276d
HC		 405 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
406 rc |= put_guest_lc(vcpu, 0x0d00, (u16 *)__LC_EXT_CPU_ADDR);
407 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
408 &vcpu->arch.sie_block->gpsw,
409 sizeof(psw_t));
410 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
dc5008b9 411 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
7988276d
HC		 412 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
413 (u32 *)__LC_EXT_PARAMS);
414 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
415 (u64 *)__LC_EXT_PARAMS2);
ba5c1e9b 416 break;
ba5c1e9b
CO		 417 case KVM_S390_SIGP_STOP:
418 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop");
419 vcpu->stat.deliver_stop_signal++;
ade38c31
CH		 420 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
421 0, 0);
ba5c1e9b
CO		 422 __set_intercept_indicator(vcpu, inti);
423 break;
424
425 case KVM_S390_SIGP_SET_PREFIX:
426 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x",
427 inti->prefix.address);
428 vcpu->stat.deliver_prefix_signal++;
ade38c31
CH		 429 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
430 inti->prefix.address, 0);
8d26cf7b 431 kvm_s390_set_prefix(vcpu, inti->prefix.address);
ba5c1e9b
CO		 432 break;
433
434 case KVM_S390_RESTART:
435 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
436 vcpu->stat.deliver_restart_signal++;
ade38c31
CH		 437 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
438 0, 0);
1a03b764
JF		 439 rc = write_guest_lc(vcpu,
440 offsetof(struct _lowcore, restart_old_psw),
441 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
442 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
443 &vcpu->arch.sie_block->gpsw,
444 sizeof(psw_t));
ba5c1e9b 445 break;
ba5c1e9b
CO		 446 case KVM_S390_PROGRAM_INT:
447 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
448 inti->pgm.code,
449 table[vcpu->arch.sie_block->ipa >> 14]);
450 vcpu->stat.deliver_program_int++;
ade38c31
CH		 451 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
452 inti->pgm.code, 0);
8712836b 453 rc = __deliver_prog_irq(vcpu, &inti->pgm);
ba5c1e9b
CO		 454 break;
455
48a3e950
CH		 456 case KVM_S390_MCHK:
457 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
458 inti->mchk.mcic);
459 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
460 inti->mchk.cr14,
461 inti->mchk.mcic);
dc5008b9
HC		 462 rc = kvm_s390_vcpu_store_status(vcpu,
463 KVM_S390_STORE_STATUS_PREFIXED);
7988276d
HC		 464 rc |= put_guest_lc(vcpu, inti->mchk.mcic, (u64 *)__LC_MCCK_CODE);
465 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
466 &vcpu->arch.sie_block->gpsw,
467 sizeof(psw_t));
468 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
dc5008b9 469 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
48a3e950
CH		 470 break;
471
d8346b7d
CH		 472 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
473 {
474 __u32 param0 = ((__u32)inti->io.subchannel_id << 16) |
475 inti->io.subchannel_nr;
476 __u64 param1 = ((__u64)inti->io.io_int_parm << 32) |
477 inti->io.io_int_word;
478 VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
479 vcpu->stat.deliver_io_int++;
480 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
481 param0, param1);
7988276d
HC		 482 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
483 (u16 *)__LC_SUBCHANNEL_ID);
484 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
485 (u16 *)__LC_SUBCHANNEL_NR);
486 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
487 (u32 *)__LC_IO_INT_PARM);
488 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
489 (u32 *)__LC_IO_INT_WORD);
490 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
491 &vcpu->arch.sie_block->gpsw,
492 sizeof(psw_t));
493 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
494 &vcpu->arch.sie_block->gpsw,
495 sizeof(psw_t));
d8346b7d
CH		 496 break;
497 }
ba5c1e9b
CO		 498 default:
499 BUG();
500 }
dc5008b9 501 if (rc) {
3cd61299 502 printk("kvm: The guest lowcore is not mapped during interrupt "
dc5008b9 503 "delivery, killing userspace\n");
3cd61299 504 do_exit(SIGKILL);
ba5c1e9b
CO		 505 }
506}
507
bb78c5ec 508static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
ba5c1e9b 509{
dc5008b9 510 int rc;
ba5c1e9b 511
1a03b764
JF		 512 rc = put_guest_lc(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE);
513 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
514 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
515 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
516 &vcpu->arch.sie_block->gpsw,
517 sizeof(psw_t));
dc5008b9 518 if (rc) {
3cd61299
CB		 519 printk("kvm: The guest lowcore is not mapped during interrupt "
520 "delivery, killing userspace\n");
521 do_exit(SIGKILL);
ba5c1e9b 522 }
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)) {
547 spin_lock_bh(&li->lock);
548 list_for_each_entry(inti, &li->list, list)
549 if (__interrupt_is_deliverable(vcpu, inti)) {
550 rc = 1;
551 break;
552 }
553 spin_unlock_bh(&li->lock);
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
ca872302 620void kvm_s390_tasklet(unsigned long parm)
ba5c1e9b 621{
ca872302 622 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm;
ba5c1e9b 623
d0321a24
CB		 624 if (waitqueue_active(&vcpu->wq))
625 wake_up_interruptible(&vcpu->wq);
ba5c1e9b
CO		 626}
627
ca872302
CB		 628/*
629 * low level hrtimer wake routine. Because this runs in hardirq context
630 * we schedule a tasklet to do the real work.
631 */
632enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
633{
634 struct kvm_vcpu *vcpu;
635
636 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
9cac38dd 637 vcpu->preempted = true;
ca872302
CB		 638 tasklet_schedule(&vcpu->arch.tasklet);
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
648 spin_lock_bh(&li->lock);
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);
654 spin_unlock_bh(&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
ba5c1e9b
CO		 662void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
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
CO		 667 int deliver;
668
669 __reset_intercept_indicators(vcpu);
670 if (atomic_read(&li->active)) {
671 do {
672 deliver = 0;
673 spin_lock_bh(&li->lock);
674 list_for_each_entry_safe(inti, n, &li->list, list) {
675 if (__interrupt_is_deliverable(vcpu, inti)) {
676 list_del(&inti->list);
677 deliver = 1;
678 break;
679 }
680 __set_intercept_indicator(vcpu, inti);
681 }
682 if (list_empty(&li->list))
683 atomic_set(&li->active, 0);
684 spin_unlock_bh(&li->lock);
685 if (deliver) {
686 __do_deliver_interrupt(vcpu, inti);
687 kfree(inti);
688 }
689 } while (deliver);
690 }
691
bb78c5ec
DH		 692 if (kvm_cpu_has_pending_timer(vcpu))
693 deliver_ckc_interrupt(vcpu);
ba5c1e9b
CO		 694
695 if (atomic_read(&fi->active)) {
696 do {
697 deliver = 0;
b037a4f3 698 spin_lock(&fi->lock);
ba5c1e9b
CO		 699 list_for_each_entry_safe(inti, n, &fi->list, list) {
700 if (__interrupt_is_deliverable(vcpu, inti)) {
701 list_del(&inti->list);
a91b8ebe 702 fi->irq_count--;
ba5c1e9b
CO		 703 deliver = 1;
704 break;
705 }
706 __set_intercept_indicator(vcpu, inti);
707 }
708 if (list_empty(&fi->list))
709 atomic_set(&fi->active, 0);
b037a4f3 710 spin_unlock(&fi->lock);
ba5c1e9b
CO		 711 if (deliver) {
712 __do_deliver_interrupt(vcpu, inti);
713 kfree(inti);
714 }
715 } while (deliver);
716 }
717}
718
48a3e950
CH		 719void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu)
720{
721 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
722 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
723 struct kvm_s390_interrupt_info *n, *inti = NULL;
724 int deliver;
725
726 __reset_intercept_indicators(vcpu);
727 if (atomic_read(&li->active)) {
728 do {
729 deliver = 0;
730 spin_lock_bh(&li->lock);
731 list_for_each_entry_safe(inti, n, &li->list, list) {
732 if ((inti->type == KVM_S390_MCHK) &&
733 __interrupt_is_deliverable(vcpu, inti)) {
734 list_del(&inti->list);
735 deliver = 1;
736 break;
737 }
738 __set_intercept_indicator(vcpu, inti);
739 }
740 if (list_empty(&li->list))
741 atomic_set(&li->active, 0);
742 spin_unlock_bh(&li->lock);
743 if (deliver) {
744 __do_deliver_interrupt(vcpu, inti);
745 kfree(inti);
746 }
747 } while (deliver);
748 }
749
750 if (atomic_read(&fi->active)) {
751 do {
752 deliver = 0;
753 spin_lock(&fi->lock);
754 list_for_each_entry_safe(inti, n, &fi->list, list) {
755 if ((inti->type == KVM_S390_MCHK) &&
756 __interrupt_is_deliverable(vcpu, inti)) {
757 list_del(&inti->list);
a91b8ebe 758 fi->irq_count--;
48a3e950
CH		 759 deliver = 1;
760 break;
761 }
762 __set_intercept_indicator(vcpu, inti);
763 }
764 if (list_empty(&fi->list))
765 atomic_set(&fi->active, 0);
766 spin_unlock(&fi->lock);
767 if (deliver) {
768 __do_deliver_interrupt(vcpu, inti);
769 kfree(inti);
770 }
771 } while (deliver);
772 }
773}
774
ba5c1e9b
CO		 775int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
776{
180c12fb
CB		 777 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
778 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 779
780 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
781 if (!inti)
782 return -ENOMEM;
783
a419aef8 784 inti->type = KVM_S390_PROGRAM_INT;
ba5c1e9b
CO		 785 inti->pgm.code = code;
786
787 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
ade38c31 788 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, inti->type, code, 0, 1);
ba5c1e9b
CO		 789 spin_lock_bh(&li->lock);
790 list_add(&inti->list, &li->list);
791 atomic_set(&li->active, 1);
d0321a24 792 BUG_ON(waitqueue_active(li->wq));
ba5c1e9b 793 spin_unlock_bh(&li->lock);
bcd84683
JF		 794 return 0;
795}
796
797int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
798 struct kvm_s390_pgm_info *pgm_info)
799{
800 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
801 struct kvm_s390_interrupt_info *inti;
802
803 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
804 if (!inti)
805 return -ENOMEM;
806
807 VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
808 pgm_info->code);
809 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
810 pgm_info->code, 0, 1);
811
812 inti->type = KVM_S390_PROGRAM_INT;
813 memcpy(&inti->pgm, pgm_info, sizeof(inti->pgm));
814 spin_lock_bh(&li->lock);
815 list_add(&inti->list, &li->list);
816 atomic_set(&li->active, 1);
817 BUG_ON(waitqueue_active(li->wq));
818 spin_unlock_bh(&li->lock);
ba5c1e9b
CO		 819 return 0;
820}
821
fa6b7fe9
CH		 822struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
823 u64 cr6, u64 schid)
824{
825 struct kvm_s390_float_interrupt *fi;
826 struct kvm_s390_interrupt_info *inti, *iter;
827
828 if ((!schid && !cr6) || (schid && cr6))
829 return NULL;
830 mutex_lock(&kvm->lock);
831 fi = &kvm->arch.float_int;
832 spin_lock(&fi->lock);
833 inti = NULL;
834 list_for_each_entry(iter, &fi->list, list) {
835 if (!is_ioint(iter->type))
836 continue;
79fd50c6
CH		 837 if (cr6 &&
838 ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
fa6b7fe9
CH		 839 continue;
840 if (schid) {
841 if (((schid & 0x00000000ffff0000) >> 16) !=
842 iter->io.subchannel_id)
843 continue;
844 if ((schid & 0x000000000000ffff) !=
845 iter->io.subchannel_nr)
846 continue;
847 }
848 inti = iter;
849 break;
850 }
a91b8ebe 851 if (inti) {
fa6b7fe9 852 list_del_init(&inti->list);
a91b8ebe
JF		 853 fi->irq_count--;
854 }
fa6b7fe9
CH		 855 if (list_empty(&fi->list))
856 atomic_set(&fi->active, 0);
857 spin_unlock(&fi->lock);
858 mutex_unlock(&kvm->lock);
859 return inti;
860}
ba5c1e9b 861
a91b8ebe 862static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
ba5c1e9b 863{
180c12fb
CB		 864 struct kvm_s390_local_interrupt *li;
865 struct kvm_s390_float_interrupt *fi;
c05c4186 866 struct kvm_s390_interrupt_info *iter;
1ee0bc55 867 struct kvm_vcpu *dst_vcpu = NULL;
ba5c1e9b 868 int sigcpu;
a91b8ebe 869 int rc = 0;
ba5c1e9b 870
c05c4186
JF		 871 mutex_lock(&kvm->lock);
872 fi = &kvm->arch.float_int;
873 spin_lock(&fi->lock);
a91b8ebe
JF		 874 if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
875 rc = -EINVAL;
876 goto unlock_fi;
877 }
878 fi->irq_count++;
c05c4186
JF		 879 if (!is_ioint(inti->type)) {
880 list_add_tail(&inti->list, &fi->list);
881 } else {
882 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
883
884 /* Keep I/O interrupts sorted in isc order. */
885 list_for_each_entry(iter, &fi->list, list) {
886 if (!is_ioint(iter->type))
887 continue;
888 if (int_word_to_isc_bits(iter->io.io_int_word)
889 <= isc_bits)
890 continue;
891 break;
892 }
893 list_add_tail(&inti->list, &iter->list);
894 }
895 atomic_set(&fi->active, 1);
896 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
897 if (sigcpu == KVM_MAX_VCPUS) {
898 do {
899 sigcpu = fi->next_rr_cpu++;
900 if (sigcpu == KVM_MAX_VCPUS)
901 sigcpu = fi->next_rr_cpu = 0;
1ee0bc55 902 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
c05c4186 903 }
1ee0bc55
JF		 904 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
905 li = &dst_vcpu->arch.local_int;
c05c4186
JF		 906 spin_lock_bh(&li->lock);
907 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
908 if (waitqueue_active(li->wq))
909 wake_up_interruptible(li->wq);
9cac38dd 910 kvm_get_vcpu(kvm, sigcpu)->preempted = true;
c05c4186 911 spin_unlock_bh(&li->lock);
a91b8ebe 912unlock_fi:
c05c4186
JF		 913 spin_unlock(&fi->lock);
914 mutex_unlock(&kvm->lock);
a91b8ebe 915 return rc;
c05c4186
JF		 916}
917
918int kvm_s390_inject_vm(struct kvm *kvm,
919 struct kvm_s390_interrupt *s390int)
920{
921 struct kvm_s390_interrupt_info *inti;
922
ba5c1e9b
CO		 923 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
924 if (!inti)
925 return -ENOMEM;
926
c05c4186
JF		 927 inti->type = s390int->type;
928 switch (inti->type) {
ba5c1e9b 929 case KVM_S390_INT_VIRTIO:
33e19115 930 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 931 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 932 inti->ext.ext_params = s390int->parm;
933 inti->ext.ext_params2 = s390int->parm64;
934 break;
935 case KVM_S390_INT_SERVICE:
936 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 937 inti->ext.ext_params = s390int->parm;
938 break;
3c038e6b
DD		 939 case KVM_S390_INT_PFAULT_DONE:
940 inti->type = s390int->type;
941 inti->ext.ext_params2 = s390int->parm64;
942 break;
48a3e950
CH		 943 case KVM_S390_MCHK:
944 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
945 s390int->parm64);
48a3e950
CH		 946 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
947 inti->mchk.mcic = s390int->parm64;
948 break;
d8346b7d 949 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
c05c4186 950 if (inti->type & IOINT_AI_MASK)
d8346b7d
CH		 951 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
952 else
953 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
954 s390int->type & IOINT_CSSID_MASK,
955 s390int->type & IOINT_SSID_MASK,
956 s390int->type & IOINT_SCHID_MASK);
d8346b7d
CH		 957 inti->io.subchannel_id = s390int->parm >> 16;
958 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
959 inti->io.io_int_parm = s390int->parm64 >> 32;
960 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
961 break;
ba5c1e9b
CO		 962 default:
963 kfree(inti);
964 return -EINVAL;
965 }
ade38c31
CH		 966 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
967 2);
ba5c1e9b 968
a91b8ebe 969 return __inject_vm(kvm, inti);
ba5c1e9b
CO		 970}
971
2f32d4ea
CH		 972void kvm_s390_reinject_io_int(struct kvm *kvm,
973 struct kvm_s390_interrupt_info *inti)
974{
975 __inject_vm(kvm, inti);
976}
977
ba5c1e9b
CO		 978int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
979 struct kvm_s390_interrupt *s390int)
980{
180c12fb
CB		 981 struct kvm_s390_local_interrupt *li;
982 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 983
984 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
985 if (!inti)
986 return -ENOMEM;
987
988 switch (s390int->type) {
989 case KVM_S390_PROGRAM_INT:
990 if (s390int->parm & 0xffff0000) {
991 kfree(inti);
992 return -EINVAL;
993 }
994 inti->type = s390int->type;
995 inti->pgm.code = s390int->parm;
996 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
997 s390int->parm);
998 break;
b7e6e4d3
CB		 999 case KVM_S390_SIGP_SET_PREFIX:
1000 inti->prefix.address = s390int->parm;
1001 inti->type = s390int->type;
1002 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
1003 s390int->parm);
1004 break;
ba5c1e9b
CO		 1005 case KVM_S390_SIGP_STOP:
1006 case KVM_S390_RESTART:
e029ae5b
TH		 1007 case KVM_S390_INT_CLOCK_COMP:
1008 case KVM_S390_INT_CPU_TIMER:
82a12737
JH		 1009 VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
1010 inti->type = s390int->type;
1011 break;
7697e71f 1012 case KVM_S390_INT_EXTERNAL_CALL:
82a12737
JH		 1013 if (s390int->parm & 0xffff0000) {
1014 kfree(inti);
1015 return -EINVAL;
1016 }
1017 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
1018 s390int->parm);
1019 inti->type = s390int->type;
1020 inti->extcall.code = s390int->parm;
1021 break;
ba5c1e9b 1022 case KVM_S390_INT_EMERGENCY:
82a12737
JH		 1023 if (s390int->parm & 0xffff0000) {
1024 kfree(inti);
1025 return -EINVAL;
1026 }
1027 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm);
ba5c1e9b 1028 inti->type = s390int->type;
82a12737 1029 inti->emerg.code = s390int->parm;
ba5c1e9b 1030 break;
48a3e950
CH		 1031 case KVM_S390_MCHK:
1032 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
1033 s390int->parm64);
1034 inti->type = s390int->type;
1035 inti->mchk.mcic = s390int->parm64;
1036 break;
3c038e6b
DD		 1037 case KVM_S390_INT_PFAULT_INIT:
1038 inti->type = s390int->type;
1039 inti->ext.ext_params2 = s390int->parm64;
1040 break;
ba5c1e9b
CO		 1041 case KVM_S390_INT_VIRTIO:
1042 case KVM_S390_INT_SERVICE:
d8346b7d 1043 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b
CO		 1044 default:
1045 kfree(inti);
1046 return -EINVAL;
1047 }
ade38c31
CH		 1048 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm,
1049 s390int->parm64, 2);
ba5c1e9b
CO		 1050
1051 mutex_lock(&vcpu->kvm->lock);
1052 li = &vcpu->arch.local_int;
1053 spin_lock_bh(&li->lock);
1054 if (inti->type == KVM_S390_PROGRAM_INT)
1055 list_add(&inti->list, &li->list);
1056 else
1057 list_add_tail(&inti->list, &li->list);
1058 atomic_set(&li->active, 1);
1059 if (inti->type == KVM_S390_SIGP_STOP)
1060 li->action_bits |= ACTION_STOP_ON_STOP;
1061 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
d0321a24
CB		 1062 if (waitqueue_active(&vcpu->wq))
1063 wake_up_interruptible(&vcpu->wq);
9cac38dd 1064 vcpu->preempted = true;
ba5c1e9b
CO		 1065 spin_unlock_bh(&li->lock);
1066 mutex_unlock(&vcpu->kvm->lock);
1067 return 0;
1068}
c05c4186 1069
67335e63 1070void kvm_s390_clear_float_irqs(struct kvm *kvm)
c05c4186
JF		 1071{
1072 struct kvm_s390_float_interrupt *fi;
1073 struct kvm_s390_interrupt_info *n, *inti = NULL;
1074
1075 mutex_lock(&kvm->lock);
1076 fi = &kvm->arch.float_int;
1077 spin_lock(&fi->lock);
1078 list_for_each_entry_safe(inti, n, &fi->list, list) {
1079 list_del(&inti->list);
1080 kfree(inti);
1081 }
a91b8ebe 1082 fi->irq_count = 0;
c05c4186
JF		 1083 atomic_set(&fi->active, 0);
1084 spin_unlock(&fi->lock);
1085 mutex_unlock(&kvm->lock);
1086}
1087
1088static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti,
1089 u8 *addr)
1090{
1091 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1092 struct kvm_s390_irq irq = {0};
1093
1094 irq.type = inti->type;
1095 switch (inti->type) {
3c038e6b
DD		 1096 case KVM_S390_INT_PFAULT_INIT:
1097 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1098 case KVM_S390_INT_VIRTIO:
1099 case KVM_S390_INT_SERVICE:
1100 irq.u.ext = inti->ext;
1101 break;
1102 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1103 irq.u.io = inti->io;
1104 break;
1105 case KVM_S390_MCHK:
1106 irq.u.mchk = inti->mchk;
1107 break;
1108 default:
1109 return -EINVAL;
1110 }
1111
1112 if (copy_to_user(uptr, &irq, sizeof(irq)))
1113 return -EFAULT;
1114
1115 return 0;
1116}
1117
1118static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len)
1119{
1120 struct kvm_s390_interrupt_info *inti;
1121 struct kvm_s390_float_interrupt *fi;
1122 int ret = 0;
1123 int n = 0;
1124
1125 mutex_lock(&kvm->lock);
1126 fi = &kvm->arch.float_int;
1127 spin_lock(&fi->lock);
1128
1129 list_for_each_entry(inti, &fi->list, list) {
1130 if (len < sizeof(struct kvm_s390_irq)) {
1131 /* signal userspace to try again */
1132 ret = -ENOMEM;
1133 break;
1134 }
1135 ret = copy_irq_to_user(inti, buf);
1136 if (ret)
1137 break;
1138 buf += sizeof(struct kvm_s390_irq);
1139 len -= sizeof(struct kvm_s390_irq);
1140 n++;
1141 }
1142
1143 spin_unlock(&fi->lock);
1144 mutex_unlock(&kvm->lock);
1145
1146 return ret < 0 ? ret : n;
1147}
1148
1149static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1150{
1151 int r;
1152
1153 switch (attr->group) {
1154 case KVM_DEV_FLIC_GET_ALL_IRQS:
1155 r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr,
1156 attr->attr);
1157 break;
1158 default:
1159 r = -EINVAL;
1160 }
1161
1162 return r;
1163}
1164
1165static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1166 u64 addr)
1167{
1168 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1169 void *target = NULL;
1170 void __user *source;
1171 u64 size;
1172
1173 if (get_user(inti->type, (u64 __user *)addr))
1174 return -EFAULT;
1175
1176 switch (inti->type) {
3c038e6b
DD		 1177 case KVM_S390_INT_PFAULT_INIT:
1178 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1179 case KVM_S390_INT_VIRTIO:
1180 case KVM_S390_INT_SERVICE:
1181 target = (void *) &inti->ext;
1182 source = &uptr->u.ext;
1183 size = sizeof(inti->ext);
1184 break;
1185 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1186 target = (void *) &inti->io;
1187 source = &uptr->u.io;
1188 size = sizeof(inti->io);
1189 break;
1190 case KVM_S390_MCHK:
1191 target = (void *) &inti->mchk;
1192 source = &uptr->u.mchk;
1193 size = sizeof(inti->mchk);
1194 break;
1195 default:
1196 return -EINVAL;
1197 }
1198
1199 if (copy_from_user(target, source, size))
1200 return -EFAULT;
1201
1202 return 0;
1203}
1204
1205static int enqueue_floating_irq(struct kvm_device *dev,
1206 struct kvm_device_attr *attr)
1207{
1208 struct kvm_s390_interrupt_info *inti = NULL;
1209 int r = 0;
1210 int len = attr->attr;
1211
1212 if (len % sizeof(struct kvm_s390_irq) != 0)
1213 return -EINVAL;
1214 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1215 return -EINVAL;
1216
1217 while (len >= sizeof(struct kvm_s390_irq)) {
1218 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1219 if (!inti)
1220 return -ENOMEM;
1221
1222 r = copy_irq_from_user(inti, attr->addr);
1223 if (r) {
1224 kfree(inti);
1225 return r;
1226 }
a91b8ebe
JF		 1227 r = __inject_vm(dev->kvm, inti);
1228 if (r) {
1229 kfree(inti);
1230 return r;
1231 }
c05c4186
JF		 1232 len -= sizeof(struct kvm_s390_irq);
1233 attr->addr += sizeof(struct kvm_s390_irq);
1234 }
1235
1236 return r;
1237}
1238
841b91c5
CH		 1239static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1240{
1241 if (id >= MAX_S390_IO_ADAPTERS)
1242 return NULL;
1243 return kvm->arch.adapters[id];
1244}
1245
1246static int register_io_adapter(struct kvm_device *dev,
1247 struct kvm_device_attr *attr)
1248{
1249 struct s390_io_adapter *adapter;
1250 struct kvm_s390_io_adapter adapter_info;
1251
1252 if (copy_from_user(&adapter_info,
1253 (void __user *)attr->addr, sizeof(adapter_info)))
1254 return -EFAULT;
1255
1256 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1257 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1258 return -EINVAL;
1259
1260 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1261 if (!adapter)
1262 return -ENOMEM;
1263
1264 INIT_LIST_HEAD(&adapter->maps);
1265 init_rwsem(&adapter->maps_lock);
1266 atomic_set(&adapter->nr_maps, 0);
1267 adapter->id = adapter_info.id;
1268 adapter->isc = adapter_info.isc;
1269 adapter->maskable = adapter_info.maskable;
1270 adapter->masked = false;
1271 adapter->swap = adapter_info.swap;
1272 dev->kvm->arch.adapters[adapter->id] = adapter;
1273
1274 return 0;
1275}
1276
1277int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1278{
1279 int ret;
1280 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1281
1282 if (!adapter || !adapter->maskable)
1283 return -EINVAL;
1284 ret = adapter->masked;
1285 adapter->masked = masked;
1286 return ret;
1287}
1288
1289static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1290{
1291 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1292 struct s390_map_info *map;
1293 int ret;
1294
1295 if (!adapter || !addr)
1296 return -EINVAL;
1297
1298 map = kzalloc(sizeof(*map), GFP_KERNEL);
1299 if (!map) {
1300 ret = -ENOMEM;
1301 goto out;
1302 }
1303 INIT_LIST_HEAD(&map->list);
1304 map->guest_addr = addr;
1305 map->addr = gmap_translate(addr, kvm->arch.gmap);
1306 if (map->addr == -EFAULT) {
1307 ret = -EFAULT;
1308 goto out;
1309 }
1310 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1311 if (ret < 0)
1312 goto out;
1313 BUG_ON(ret != 1);
1314 down_write(&adapter->maps_lock);
1315 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1316 list_add_tail(&map->list, &adapter->maps);
1317 ret = 0;
1318 } else {
1319 put_page(map->page);
1320 ret = -EINVAL;
1321 }
1322 up_write(&adapter->maps_lock);
1323out:
1324 if (ret)
1325 kfree(map);
1326 return ret;
1327}
1328
1329static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1330{
1331 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1332 struct s390_map_info *map, *tmp;
1333 int found = 0;
1334
1335 if (!adapter || !addr)
1336 return -EINVAL;
1337
1338 down_write(&adapter->maps_lock);
1339 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1340 if (map->guest_addr == addr) {
1341 found = 1;
1342 atomic_dec(&adapter->nr_maps);
1343 list_del(&map->list);
1344 put_page(map->page);
1345 kfree(map);
1346 break;
1347 }
1348 }
1349 up_write(&adapter->maps_lock);
1350
1351 return found ? 0 : -EINVAL;
1352}
1353
1354void kvm_s390_destroy_adapters(struct kvm *kvm)
1355{
1356 int i;
1357 struct s390_map_info *map, *tmp;
1358
1359 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1360 if (!kvm->arch.adapters[i])
1361 continue;
1362 list_for_each_entry_safe(map, tmp,
1363 &kvm->arch.adapters[i]->maps, list) {
1364 list_del(&map->list);
1365 put_page(map->page);
1366 kfree(map);
1367 }
1368 kfree(kvm->arch.adapters[i]);
1369 }
1370}
1371
1372static int modify_io_adapter(struct kvm_device *dev,
1373 struct kvm_device_attr *attr)
1374{
1375 struct kvm_s390_io_adapter_req req;
1376 struct s390_io_adapter *adapter;
1377 int ret;
1378
1379 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1380 return -EFAULT;
1381
1382 adapter = get_io_adapter(dev->kvm, req.id);
1383 if (!adapter)
1384 return -EINVAL;
1385 switch (req.type) {
1386 case KVM_S390_IO_ADAPTER_MASK:
1387 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1388 if (ret > 0)
1389 ret = 0;
1390 break;
1391 case KVM_S390_IO_ADAPTER_MAP:
1392 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1393 break;
1394 case KVM_S390_IO_ADAPTER_UNMAP:
1395 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1396 break;
1397 default:
1398 ret = -EINVAL;
1399 }
1400
1401 return ret;
1402}
1403
c05c4186
JF		 1404static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1405{
1406 int r = 0;
3c038e6b
DD		 1407 unsigned int i;
1408 struct kvm_vcpu *vcpu;
c05c4186
JF		 1409
1410 switch (attr->group) {
1411 case KVM_DEV_FLIC_ENQUEUE:
1412 r = enqueue_floating_irq(dev, attr);
1413 break;
1414 case KVM_DEV_FLIC_CLEAR_IRQS:
1415 r = 0;
67335e63 1416 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 1417 break;
3c038e6b
DD		 1418 case KVM_DEV_FLIC_APF_ENABLE:
1419 dev->kvm->arch.gmap->pfault_enabled = 1;
1420 break;
1421 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1422 dev->kvm->arch.gmap->pfault_enabled = 0;
1423 /*
1424 * Make sure no async faults are in transition when
1425 * clearing the queues. So we don't need to worry
1426 * about late coming workers.
1427 */
1428 synchronize_srcu(&dev->kvm->srcu);
1429 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1430 kvm_clear_async_pf_completion_queue(vcpu);
1431 break;
841b91c5
CH		 1432 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1433 r = register_io_adapter(dev, attr);
1434 break;
1435 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1436 r = modify_io_adapter(dev, attr);
1437 break;
c05c4186
JF		 1438 default:
1439 r = -EINVAL;
1440 }
1441
1442 return r;
1443}
1444
1445static int flic_create(struct kvm_device *dev, u32 type)
1446{
1447 if (!dev)
1448 return -EINVAL;
1449 if (dev->kvm->arch.flic)
1450 return -EINVAL;
1451 dev->kvm->arch.flic = dev;
1452 return 0;
1453}
1454
1455static void flic_destroy(struct kvm_device *dev)
1456{
1457 dev->kvm->arch.flic = NULL;
1458 kfree(dev);
1459}
1460
1461/* s390 floating irq controller (flic) */
1462struct kvm_device_ops kvm_flic_ops = {
1463 .name = "kvm-flic",
1464 .get_attr = flic_get_attr,
1465 .set_attr = flic_set_attr,
1466 .create = flic_create,
1467 .destroy = flic_destroy,
1468};
84223598
CH		 1469
1470static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
1471{
1472 unsigned long bit;
1473
1474 bit = bit_nr + (addr % PAGE_SIZE) * 8;
1475
1476 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
1477}
1478
1479static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
1480 u64 addr)
1481{
1482 struct s390_map_info *map;
1483
1484 if (!adapter)
1485 return NULL;
1486
1487 list_for_each_entry(map, &adapter->maps, list) {
1488 if (map->guest_addr == addr)
1489 return map;
1490 }
1491 return NULL;
1492}
1493
1494static int adapter_indicators_set(struct kvm *kvm,
1495 struct s390_io_adapter *adapter,
1496 struct kvm_s390_adapter_int *adapter_int)
1497{
1498 unsigned long bit;
1499 int summary_set, idx;
1500 struct s390_map_info *info;
1501 void *map;
1502
1503 info = get_map_info(adapter, adapter_int->ind_addr);
1504 if (!info)
1505 return -1;
1506 map = page_address(info->page);
1507 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
1508 set_bit(bit, map);
1509 idx = srcu_read_lock(&kvm->srcu);
1510 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1511 set_page_dirty_lock(info->page);
1512 info = get_map_info(adapter, adapter_int->summary_addr);
1513 if (!info) {
1514 srcu_read_unlock(&kvm->srcu, idx);
1515 return -1;
1516 }
1517 map = page_address(info->page);
1518 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
1519 adapter->swap);
1520 summary_set = test_and_set_bit(bit, map);
1521 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1522 set_page_dirty_lock(info->page);
1523 srcu_read_unlock(&kvm->srcu, idx);
1524 return summary_set ? 0 : 1;
1525}
1526
1527/*
1528 * < 0 - not injected due to error
1529 * = 0 - coalesced, summary indicator already active
1530 * > 0 - injected interrupt
1531 */
1532static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
1533 struct kvm *kvm, int irq_source_id, int level,
1534 bool line_status)
1535{
1536 int ret;
1537 struct s390_io_adapter *adapter;
1538
1539 /* We're only interested in the 0->1 transition. */
1540 if (!level)
1541 return 0;
1542 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
1543 if (!adapter)
1544 return -1;
1545 down_read(&adapter->maps_lock);
1546 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
1547 up_read(&adapter->maps_lock);
1548 if ((ret > 0) && !adapter->masked) {
1549 struct kvm_s390_interrupt s390int = {
1550 .type = KVM_S390_INT_IO(1, 0, 0, 0),
1551 .parm = 0,
1552 .parm64 = (adapter->isc << 27) | 0x80000000,
1553 };
1554 ret = kvm_s390_inject_vm(kvm, &s390int);
1555 if (ret == 0)
1556 ret = 1;
1557 }
1558 return ret;
1559}
1560
1561int kvm_set_routing_entry(struct kvm_irq_routing_table *rt,
1562 struct kvm_kernel_irq_routing_entry *e,
1563 const struct kvm_irq_routing_entry *ue)
1564{
1565 int ret;
1566
1567 switch (ue->type) {
1568 case KVM_IRQ_ROUTING_S390_ADAPTER:
1569 e->set = set_adapter_int;
1570 e->adapter.summary_addr = ue->u.adapter.summary_addr;
1571 e->adapter.ind_addr = ue->u.adapter.ind_addr;
1572 e->adapter.summary_offset = ue->u.adapter.summary_offset;
1573 e->adapter.ind_offset = ue->u.adapter.ind_offset;
1574 e->adapter.adapter_id = ue->u.adapter.adapter_id;
1575 ret = 0;
1576 break;
1577 default:
1578 ret = -EINVAL;
1579 }
1580
1581 return ret;
1582}
1583
1584int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
1585 int irq_source_id, int level, bool line_status)
1586{
1587 return -EINVAL;
1588}
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