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KVM: s390: add and extend interrupt information data structs
[deliverable/linux.git] / arch / s390 / kvm / interrupt.c
CommitLineData
ba5c1e9b 1/*
a53c8fab 2 * handling kvm guest interrupts
ba5c1e9b
CO		 3 *
4 * Copyright IBM Corp. 2008
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>
3cd61299 16#include <linux/signal.h>
5a0e3ad6 17#include <linux/slab.h>
cbb870c8
HC		 18#include <asm/asm-offsets.h>
19#include <asm/uaccess.h>
ba5c1e9b
CO		 20#include "kvm-s390.h"
21#include "gaccess.h"
ade38c31 22#include "trace-s390.h"
ba5c1e9b 23
d8346b7d
CH		 24#define IOINT_SCHID_MASK 0x0000ffff
25#define IOINT_SSID_MASK 0x00030000
26#define IOINT_CSSID_MASK 0x03fc0000
27#define IOINT_AI_MASK 0x04000000
28
29static int is_ioint(u64 type)
30{
31 return ((type & 0xfffe0000u) != 0xfffe0000u);
32}
33
ba5c1e9b
CO		 34static int psw_extint_disabled(struct kvm_vcpu *vcpu)
35{
36 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
37}
38
d8346b7d
CH		 39static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
40{
41 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
42}
43
48a3e950
CH		 44static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
45{
46 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
47}
48
ba5c1e9b
CO		 49static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
50{
51 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
52 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
53 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
54 return 0;
55 return 1;
56}
57
79fd50c6
CH		 58static u64 int_word_to_isc_bits(u32 int_word)
59{
60 u8 isc = (int_word & 0x38000000) >> 27;
61
62 return (0x80 >> isc) << 24;
63}
64
ba5c1e9b 65static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
180c12fb 66 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 67{
68 switch (inti->type) {
7697e71f
CE		 69 case KVM_S390_INT_EXTERNAL_CALL:
70 if (psw_extint_disabled(vcpu))
71 return 0;
72 if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
73 return 1;
ba5c1e9b
CO		 74 case KVM_S390_INT_EMERGENCY:
75 if (psw_extint_disabled(vcpu))
76 return 0;
77 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
78 return 1;
79 return 0;
80 case KVM_S390_INT_SERVICE:
81 if (psw_extint_disabled(vcpu))
82 return 0;
83 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
84 return 1;
85 return 0;
86 case KVM_S390_INT_VIRTIO:
87 if (psw_extint_disabled(vcpu))
88 return 0;
89 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
90 return 1;
91 return 0;
92 case KVM_S390_PROGRAM_INT:
93 case KVM_S390_SIGP_STOP:
94 case KVM_S390_SIGP_SET_PREFIX:
95 case KVM_S390_RESTART:
96 return 1;
48a3e950
CH		 97 case KVM_S390_MCHK:
98 if (psw_mchk_disabled(vcpu))
99 return 0;
100 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
101 return 1;
102 return 0;
d8346b7d
CH		 103 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
104 if (psw_ioint_disabled(vcpu))
105 return 0;
79fd50c6
CH		 106 if (vcpu->arch.sie_block->gcr[6] &
107 int_word_to_isc_bits(inti->io.io_int_word))
d8346b7d
CH		 108 return 1;
109 return 0;
ba5c1e9b 110 default:
d8346b7d
CH		 111 printk(KERN_WARNING "illegal interrupt type %llx\n",
112 inti->type);
ba5c1e9b
CO		 113 BUG();
114 }
115 return 0;
116}
117
118static void __set_cpu_idle(struct kvm_vcpu *vcpu)
119{
120 BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1);
121 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
122 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
123}
124
125static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
126{
127 BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1);
128 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
129 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
130}
131
132static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
133{
134 atomic_clear_mask(CPUSTAT_ECALL_PEND |
135 CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
136 &vcpu->arch.sie_block->cpuflags);
137 vcpu->arch.sie_block->lctl = 0x0000;
48a3e950 138 vcpu->arch.sie_block->ictl &= ~ICTL_LPSW;
ba5c1e9b
CO		 139}
140
141static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
142{
143 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
144}
145
146static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
180c12fb 147 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 148{
149 switch (inti->type) {
7697e71f 150 case KVM_S390_INT_EXTERNAL_CALL:
ba5c1e9b
CO		 151 case KVM_S390_INT_EMERGENCY:
152 case KVM_S390_INT_SERVICE:
153 case KVM_S390_INT_VIRTIO:
154 if (psw_extint_disabled(vcpu))
155 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
156 else
157 vcpu->arch.sie_block->lctl |= LCTL_CR0;
158 break;
159 case KVM_S390_SIGP_STOP:
160 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
161 break;
48a3e950
CH		 162 case KVM_S390_MCHK:
163 if (psw_mchk_disabled(vcpu))
164 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
165 else
166 vcpu->arch.sie_block->lctl |= LCTL_CR14;
167 break;
d8346b7d
CH		 168 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
169 if (psw_ioint_disabled(vcpu))
170 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
171 else
172 vcpu->arch.sie_block->lctl |= LCTL_CR6;
173 break;
ba5c1e9b
CO		 174 default:
175 BUG();
176 }
177}
178
179static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
180c12fb 180 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 181{
182 const unsigned short table[] = { 2, 4, 4, 6 };
dc5008b9 183 int rc = 0;
ba5c1e9b
CO		 184
185 switch (inti->type) {
186 case KVM_S390_INT_EMERGENCY:
187 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
188 vcpu->stat.deliver_emergency_signal++;
ade38c31
CH		 189 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
190 inti->emerg.code, 0);
0a75ca27 191 rc = put_guest(vcpu, 0x1201, (u16 __user *)__LC_EXT_INT_CODE);
396083a9 192 rc |= put_guest(vcpu, inti->emerg.code,
0a75ca27 193 (u16 __user *)__LC_EXT_CPU_ADDR);
dc5008b9
HC		 194 rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
195 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
196 rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
197 __LC_EXT_NEW_PSW, sizeof(psw_t));
ba5c1e9b 198 break;
7697e71f
CE		 199 case KVM_S390_INT_EXTERNAL_CALL:
200 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
201 vcpu->stat.deliver_external_call++;
ade38c31
CH		 202 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
203 inti->extcall.code, 0);
0a75ca27 204 rc = put_guest(vcpu, 0x1202, (u16 __user *)__LC_EXT_INT_CODE);
396083a9 205 rc |= put_guest(vcpu, inti->extcall.code,
0a75ca27 206 (u16 __user *)__LC_EXT_CPU_ADDR);
dc5008b9
HC		 207 rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
208 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
209 rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
210 __LC_EXT_NEW_PSW, sizeof(psw_t));
7697e71f 211 break;
ba5c1e9b
CO		 212 case KVM_S390_INT_SERVICE:
213 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
214 inti->ext.ext_params);
215 vcpu->stat.deliver_service_signal++;
ade38c31
CH		 216 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
217 inti->ext.ext_params, 0);
0a75ca27 218 rc = put_guest(vcpu, 0x2401, (u16 __user *)__LC_EXT_INT_CODE);
dc5008b9
HC		 219 rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
220 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
221 rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
222 __LC_EXT_NEW_PSW, sizeof(psw_t));
396083a9 223 rc |= put_guest(vcpu, inti->ext.ext_params,
0a75ca27 224 (u32 __user *)__LC_EXT_PARAMS);
ba5c1e9b 225 break;
ba5c1e9b 226 case KVM_S390_INT_VIRTIO:
33e19115 227 VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
ba5c1e9b
CO		 228 inti->ext.ext_params, inti->ext.ext_params2);
229 vcpu->stat.deliver_virtio_interrupt++;
ade38c31
CH		 230 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
231 inti->ext.ext_params,
232 inti->ext.ext_params2);
0a75ca27
HC		 233 rc = put_guest(vcpu, 0x2603, (u16 __user *)__LC_EXT_INT_CODE);
234 rc |= put_guest(vcpu, 0x0d00, (u16 __user *)__LC_EXT_CPU_ADDR);
dc5008b9
HC		 235 rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
236 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
237 rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
238 __LC_EXT_NEW_PSW, sizeof(psw_t));
396083a9 239 rc |= put_guest(vcpu, inti->ext.ext_params,
0a75ca27 240 (u32 __user *)__LC_EXT_PARAMS);
396083a9 241 rc |= put_guest(vcpu, inti->ext.ext_params2,
0a75ca27 242 (u64 __user *)__LC_EXT_PARAMS2);
ba5c1e9b 243 break;
ba5c1e9b
CO		 244 case KVM_S390_SIGP_STOP:
245 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop");
246 vcpu->stat.deliver_stop_signal++;
ade38c31
CH		 247 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
248 0, 0);
ba5c1e9b
CO		 249 __set_intercept_indicator(vcpu, inti);
250 break;
251
252 case KVM_S390_SIGP_SET_PREFIX:
253 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x",
254 inti->prefix.address);
255 vcpu->stat.deliver_prefix_signal++;
ade38c31
CH		 256 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
257 inti->prefix.address, 0);
8d26cf7b 258 kvm_s390_set_prefix(vcpu, inti->prefix.address);
ba5c1e9b
CO		 259 break;
260
261 case KVM_S390_RESTART:
262 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
263 vcpu->stat.deliver_restart_signal++;
ade38c31
CH		 264 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
265 0, 0);
dc5008b9
HC		 266 rc = copy_to_guest(vcpu,
267 offsetof(struct _lowcore, restart_old_psw),
268 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
269 rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
270 offsetof(struct _lowcore, restart_psw),
271 sizeof(psw_t));
9e6dabef 272 atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 273 break;
ba5c1e9b
CO		 274 case KVM_S390_PROGRAM_INT:
275 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
276 inti->pgm.code,
277 table[vcpu->arch.sie_block->ipa >> 14]);
278 vcpu->stat.deliver_program_int++;
ade38c31
CH		 279 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
280 inti->pgm.code, 0);
0a75ca27 281 rc = put_guest(vcpu, inti->pgm.code, (u16 __user *)__LC_PGM_INT_CODE);
396083a9 282 rc |= put_guest(vcpu, table[vcpu->arch.sie_block->ipa >> 14],
0a75ca27 283 (u16 __user *)__LC_PGM_ILC);
dc5008b9
HC		 284 rc |= copy_to_guest(vcpu, __LC_PGM_OLD_PSW,
285 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
286 rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
287 __LC_PGM_NEW_PSW, sizeof(psw_t));
ba5c1e9b
CO		 288 break;
289
48a3e950
CH		 290 case KVM_S390_MCHK:
291 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
292 inti->mchk.mcic);
293 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
294 inti->mchk.cr14,
295 inti->mchk.mcic);
dc5008b9
HC		 296 rc = kvm_s390_vcpu_store_status(vcpu,
297 KVM_S390_STORE_STATUS_PREFIXED);
0a75ca27 298 rc |= put_guest(vcpu, inti->mchk.mcic, (u64 __user *) __LC_MCCK_CODE);
dc5008b9
HC		 299 rc |= copy_to_guest(vcpu, __LC_MCK_OLD_PSW,
300 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
301 rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
302 __LC_MCK_NEW_PSW, sizeof(psw_t));
48a3e950
CH		 303 break;
304
d8346b7d
CH		 305 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
306 {
307 __u32 param0 = ((__u32)inti->io.subchannel_id << 16) |
308 inti->io.subchannel_nr;
309 __u64 param1 = ((__u64)inti->io.io_int_parm << 32) |
310 inti->io.io_int_word;
311 VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
312 vcpu->stat.deliver_io_int++;
313 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
314 param0, param1);
396083a9 315 rc = put_guest(vcpu, inti->io.subchannel_id,
0a75ca27 316 (u16 __user *) __LC_SUBCHANNEL_ID);
396083a9 317 rc |= put_guest(vcpu, inti->io.subchannel_nr,
0a75ca27 318 (u16 __user *) __LC_SUBCHANNEL_NR);
396083a9 319 rc |= put_guest(vcpu, inti->io.io_int_parm,
0a75ca27 320 (u32 __user *) __LC_IO_INT_PARM);
396083a9 321 rc |= put_guest(vcpu, inti->io.io_int_word,
0a75ca27 322 (u32 __user *) __LC_IO_INT_WORD);
dc5008b9
HC		 323 rc |= copy_to_guest(vcpu, __LC_IO_OLD_PSW,
324 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
325 rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
326 __LC_IO_NEW_PSW, sizeof(psw_t));
d8346b7d
CH		 327 break;
328 }
ba5c1e9b
CO		 329 default:
330 BUG();
331 }
dc5008b9 332 if (rc) {
3cd61299 333 printk("kvm: The guest lowcore is not mapped during interrupt "
dc5008b9 334 "delivery, killing userspace\n");
3cd61299 335 do_exit(SIGKILL);
ba5c1e9b
CO		 336 }
337}
338
339static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
340{
dc5008b9 341 int rc;
ba5c1e9b
CO		 342
343 if (psw_extint_disabled(vcpu))
344 return 0;
345 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
346 return 0;
0a75ca27 347 rc = put_guest(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE);
dc5008b9
HC		 348 rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
349 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
350 rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
351 __LC_EXT_NEW_PSW, sizeof(psw_t));
352 if (rc) {
3cd61299
CB		 353 printk("kvm: The guest lowcore is not mapped during interrupt "
354 "delivery, killing userspace\n");
355 do_exit(SIGKILL);
ba5c1e9b 356 }
ba5c1e9b
CO		 357 return 1;
358}
359
a1b37100 360static int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
ba5c1e9b 361{
180c12fb
CB		 362 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
363 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
364 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 365 int rc = 0;
366
367 if (atomic_read(&li->active)) {
368 spin_lock_bh(&li->lock);
369 list_for_each_entry(inti, &li->list, list)
370 if (__interrupt_is_deliverable(vcpu, inti)) {
371 rc = 1;
372 break;
373 }
374 spin_unlock_bh(&li->lock);
375 }
376
377 if ((!rc) && atomic_read(&fi->active)) {
b037a4f3 378 spin_lock(&fi->lock);
ba5c1e9b
CO		 379 list_for_each_entry(inti, &fi->list, list)
380 if (__interrupt_is_deliverable(vcpu, inti)) {
381 rc = 1;
382 break;
383 }
b037a4f3 384 spin_unlock(&fi->lock);
ba5c1e9b
CO		 385 }
386
387 if ((!rc) && (vcpu->arch.sie_block->ckc <
8c071b0f 388 get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) {
ba5c1e9b
CO		 389 if ((!psw_extint_disabled(vcpu)) &&
390 (vcpu->arch.sie_block->gcr[0] & 0x800ul))
391 rc = 1;
392 }
393
394 return rc;
395}
396
3d80840d
MT		 397int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
398{
399 return 0;
400}
401
ba5c1e9b
CO		 402int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
403{
404 u64 now, sltime;
405 DECLARE_WAITQUEUE(wait, current);
406
407 vcpu->stat.exit_wait_state++;
408 if (kvm_cpu_has_interrupt(vcpu))
409 return 0;
410
e52b2af5
CO		 411 __set_cpu_idle(vcpu);
412 spin_lock_bh(&vcpu->arch.local_int.lock);
413 vcpu->arch.local_int.timer_due = 0;
414 spin_unlock_bh(&vcpu->arch.local_int.lock);
415
ba5c1e9b
CO		 416 if (psw_interrupts_disabled(vcpu)) {
417 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
418 __unset_cpu_idle(vcpu);
b8e660b8 419 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 420 }
421
422 if (psw_extint_disabled(vcpu) ||
423 (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))) {
424 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
425 goto no_timer;
426 }
427
8c071b0f 428 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
ba5c1e9b
CO		 429 if (vcpu->arch.sie_block->ckc < now) {
430 __unset_cpu_idle(vcpu);
431 return 0;
432 }
433
ed4f2094 434 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
ba5c1e9b 435
ca872302
CB		 436 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
437 VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
ba5c1e9b 438no_timer:
800c1065 439 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
b037a4f3 440 spin_lock(&vcpu->arch.local_int.float_int->lock);
ba5c1e9b 441 spin_lock_bh(&vcpu->arch.local_int.lock);
d0321a24 442 add_wait_queue(&vcpu->wq, &wait);
ba5c1e9b
CO		 443 while (list_empty(&vcpu->arch.local_int.list) &&
444 list_empty(&vcpu->arch.local_int.float_int->list) &&
445 (!vcpu->arch.local_int.timer_due) &&
446 !signal_pending(current)) {
447 set_current_state(TASK_INTERRUPTIBLE);
448 spin_unlock_bh(&vcpu->arch.local_int.lock);
b037a4f3 449 spin_unlock(&vcpu->arch.local_int.float_int->lock);
ba5c1e9b 450 schedule();
b037a4f3 451 spin_lock(&vcpu->arch.local_int.float_int->lock);
ba5c1e9b
CO		 452 spin_lock_bh(&vcpu->arch.local_int.lock);
453 }
454 __unset_cpu_idle(vcpu);
455 __set_current_state(TASK_RUNNING);
d0321a24 456 remove_wait_queue(&vcpu->wq, &wait);
ba5c1e9b 457 spin_unlock_bh(&vcpu->arch.local_int.lock);
b037a4f3 458 spin_unlock(&vcpu->arch.local_int.float_int->lock);
800c1065
TH		 459 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
460
ca872302 461 hrtimer_try_to_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 462 return 0;
463}
464
ca872302 465void kvm_s390_tasklet(unsigned long parm)
ba5c1e9b 466{
ca872302 467 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm;
ba5c1e9b 468
ca872302 469 spin_lock(&vcpu->arch.local_int.lock);
ba5c1e9b 470 vcpu->arch.local_int.timer_due = 1;
d0321a24
CB		 471 if (waitqueue_active(&vcpu->wq))
472 wake_up_interruptible(&vcpu->wq);
ca872302 473 spin_unlock(&vcpu->arch.local_int.lock);
ba5c1e9b
CO		 474}
475
ca872302
CB		 476/*
477 * low level hrtimer wake routine. Because this runs in hardirq context
478 * we schedule a tasklet to do the real work.
479 */
480enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
481{
482 struct kvm_vcpu *vcpu;
483
484 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
485 tasklet_schedule(&vcpu->arch.tasklet);
486
487 return HRTIMER_NORESTART;
488}
ba5c1e9b
CO		 489
490void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
491{
180c12fb
CB		 492 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
493 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
494 struct kvm_s390_interrupt_info *n, *inti = NULL;
ba5c1e9b
CO		 495 int deliver;
496
497 __reset_intercept_indicators(vcpu);
498 if (atomic_read(&li->active)) {
499 do {
500 deliver = 0;
501 spin_lock_bh(&li->lock);
502 list_for_each_entry_safe(inti, n, &li->list, list) {
503 if (__interrupt_is_deliverable(vcpu, inti)) {
504 list_del(&inti->list);
505 deliver = 1;
506 break;
507 }
508 __set_intercept_indicator(vcpu, inti);
509 }
510 if (list_empty(&li->list))
511 atomic_set(&li->active, 0);
512 spin_unlock_bh(&li->lock);
513 if (deliver) {
514 __do_deliver_interrupt(vcpu, inti);
515 kfree(inti);
516 }
517 } while (deliver);
518 }
519
520 if ((vcpu->arch.sie_block->ckc <
8c071b0f 521 get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
ba5c1e9b
CO		 522 __try_deliver_ckc_interrupt(vcpu);
523
524 if (atomic_read(&fi->active)) {
525 do {
526 deliver = 0;
b037a4f3 527 spin_lock(&fi->lock);
ba5c1e9b
CO		 528 list_for_each_entry_safe(inti, n, &fi->list, list) {
529 if (__interrupt_is_deliverable(vcpu, inti)) {
530 list_del(&inti->list);
531 deliver = 1;
532 break;
533 }
534 __set_intercept_indicator(vcpu, inti);
535 }
536 if (list_empty(&fi->list))
537 atomic_set(&fi->active, 0);
b037a4f3 538 spin_unlock(&fi->lock);
ba5c1e9b
CO		 539 if (deliver) {
540 __do_deliver_interrupt(vcpu, inti);
541 kfree(inti);
542 }
543 } while (deliver);
544 }
545}
546
48a3e950
CH		 547void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu)
548{
549 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
550 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
551 struct kvm_s390_interrupt_info *n, *inti = NULL;
552 int deliver;
553
554 __reset_intercept_indicators(vcpu);
555 if (atomic_read(&li->active)) {
556 do {
557 deliver = 0;
558 spin_lock_bh(&li->lock);
559 list_for_each_entry_safe(inti, n, &li->list, list) {
560 if ((inti->type == KVM_S390_MCHK) &&
561 __interrupt_is_deliverable(vcpu, inti)) {
562 list_del(&inti->list);
563 deliver = 1;
564 break;
565 }
566 __set_intercept_indicator(vcpu, inti);
567 }
568 if (list_empty(&li->list))
569 atomic_set(&li->active, 0);
570 spin_unlock_bh(&li->lock);
571 if (deliver) {
572 __do_deliver_interrupt(vcpu, inti);
573 kfree(inti);
574 }
575 } while (deliver);
576 }
577
578 if (atomic_read(&fi->active)) {
579 do {
580 deliver = 0;
581 spin_lock(&fi->lock);
582 list_for_each_entry_safe(inti, n, &fi->list, list) {
583 if ((inti->type == KVM_S390_MCHK) &&
584 __interrupt_is_deliverable(vcpu, inti)) {
585 list_del(&inti->list);
586 deliver = 1;
587 break;
588 }
589 __set_intercept_indicator(vcpu, inti);
590 }
591 if (list_empty(&fi->list))
592 atomic_set(&fi->active, 0);
593 spin_unlock(&fi->lock);
594 if (deliver) {
595 __do_deliver_interrupt(vcpu, inti);
596 kfree(inti);
597 }
598 } while (deliver);
599 }
600}
601
ba5c1e9b
CO		 602int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
603{
180c12fb
CB		 604 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
605 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 606
607 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
608 if (!inti)
609 return -ENOMEM;
610
a419aef8 611 inti->type = KVM_S390_PROGRAM_INT;
ba5c1e9b
CO		 612 inti->pgm.code = code;
613
614 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
ade38c31 615 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, inti->type, code, 0, 1);
ba5c1e9b
CO		 616 spin_lock_bh(&li->lock);
617 list_add(&inti->list, &li->list);
618 atomic_set(&li->active, 1);
d0321a24 619 BUG_ON(waitqueue_active(li->wq));
ba5c1e9b
CO		 620 spin_unlock_bh(&li->lock);
621 return 0;
622}
623
fa6b7fe9
CH		 624struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
625 u64 cr6, u64 schid)
626{
627 struct kvm_s390_float_interrupt *fi;
628 struct kvm_s390_interrupt_info *inti, *iter;
629
630 if ((!schid && !cr6) || (schid && cr6))
631 return NULL;
632 mutex_lock(&kvm->lock);
633 fi = &kvm->arch.float_int;
634 spin_lock(&fi->lock);
635 inti = NULL;
636 list_for_each_entry(iter, &fi->list, list) {
637 if (!is_ioint(iter->type))
638 continue;
79fd50c6
CH		 639 if (cr6 &&
640 ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
fa6b7fe9
CH		 641 continue;
642 if (schid) {
643 if (((schid & 0x00000000ffff0000) >> 16) !=
644 iter->io.subchannel_id)
645 continue;
646 if ((schid & 0x000000000000ffff) !=
647 iter->io.subchannel_nr)
648 continue;
649 }
650 inti = iter;
651 break;
652 }
653 if (inti)
654 list_del_init(&inti->list);
655 if (list_empty(&fi->list))
656 atomic_set(&fi->active, 0);
657 spin_unlock(&fi->lock);
658 mutex_unlock(&kvm->lock);
659 return inti;
660}
ba5c1e9b
CO		 661
662int kvm_s390_inject_vm(struct kvm *kvm,
663 struct kvm_s390_interrupt *s390int)
664{
180c12fb
CB		 665 struct kvm_s390_local_interrupt *li;
666 struct kvm_s390_float_interrupt *fi;
d8346b7d 667 struct kvm_s390_interrupt_info *inti, *iter;
ba5c1e9b
CO		 668 int sigcpu;
669
670 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
671 if (!inti)
672 return -ENOMEM;
673
674 switch (s390int->type) {
675 case KVM_S390_INT_VIRTIO:
33e19115 676 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b
CO		 677 s390int->parm, s390int->parm64);
678 inti->type = s390int->type;
679 inti->ext.ext_params = s390int->parm;
680 inti->ext.ext_params2 = s390int->parm64;
681 break;
682 case KVM_S390_INT_SERVICE:
683 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
684 inti->type = s390int->type;
685 inti->ext.ext_params = s390int->parm;
686 break;
687 case KVM_S390_PROGRAM_INT:
688 case KVM_S390_SIGP_STOP:
7697e71f 689 case KVM_S390_INT_EXTERNAL_CALL:
ba5c1e9b 690 case KVM_S390_INT_EMERGENCY:
d8346b7d
CH		 691 kfree(inti);
692 return -EINVAL;
48a3e950
CH		 693 case KVM_S390_MCHK:
694 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
695 s390int->parm64);
696 inti->type = s390int->type;
697 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
698 inti->mchk.mcic = s390int->parm64;
699 break;
d8346b7d
CH		 700 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
701 if (s390int->type & IOINT_AI_MASK)
702 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
703 else
704 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
705 s390int->type & IOINT_CSSID_MASK,
706 s390int->type & IOINT_SSID_MASK,
707 s390int->type & IOINT_SCHID_MASK);
708 inti->type = s390int->type;
709 inti->io.subchannel_id = s390int->parm >> 16;
710 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
711 inti->io.io_int_parm = s390int->parm64 >> 32;
712 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
713 break;
ba5c1e9b
CO		 714 default:
715 kfree(inti);
716 return -EINVAL;
717 }
ade38c31
CH		 718 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
719 2);
ba5c1e9b
CO		 720
721 mutex_lock(&kvm->lock);
722 fi = &kvm->arch.float_int;
b037a4f3 723 spin_lock(&fi->lock);
d8346b7d
CH		 724 if (!is_ioint(inti->type))
725 list_add_tail(&inti->list, &fi->list);
726 else {
79fd50c6
CH		 727 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
728
d8346b7d
CH		 729 /* Keep I/O interrupts sorted in isc order. */
730 list_for_each_entry(iter, &fi->list, list) {
731 if (!is_ioint(iter->type))
732 continue;
79fd50c6
CH		 733 if (int_word_to_isc_bits(iter->io.io_int_word)
734 <= isc_bits)
d8346b7d
CH		 735 continue;
736 break;
737 }
738 list_add_tail(&inti->list, &iter->list);
739 }
ba5c1e9b
CO		 740 atomic_set(&fi->active, 1);
741 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
742 if (sigcpu == KVM_MAX_VCPUS) {
743 do {
744 sigcpu = fi->next_rr_cpu++;
745 if (sigcpu == KVM_MAX_VCPUS)
746 sigcpu = fi->next_rr_cpu = 0;
747 } while (fi->local_int[sigcpu] == NULL);
748 }
749 li = fi->local_int[sigcpu];
750 spin_lock_bh(&li->lock);
751 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
d0321a24
CB		 752 if (waitqueue_active(li->wq))
753 wake_up_interruptible(li->wq);
ba5c1e9b 754 spin_unlock_bh(&li->lock);
b037a4f3 755 spin_unlock(&fi->lock);
ba5c1e9b
CO		 756 mutex_unlock(&kvm->lock);
757 return 0;
758}
759
760int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
761 struct kvm_s390_interrupt *s390int)
762{
180c12fb
CB		 763 struct kvm_s390_local_interrupt *li;
764 struct kvm_s390_interrupt_info *inti;
ba5c1e9b
CO		 765
766 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
767 if (!inti)
768 return -ENOMEM;
769
770 switch (s390int->type) {
771 case KVM_S390_PROGRAM_INT:
772 if (s390int->parm & 0xffff0000) {
773 kfree(inti);
774 return -EINVAL;
775 }
776 inti->type = s390int->type;
777 inti->pgm.code = s390int->parm;
778 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
779 s390int->parm);
780 break;
b7e6e4d3
CB		 781 case KVM_S390_SIGP_SET_PREFIX:
782 inti->prefix.address = s390int->parm;
783 inti->type = s390int->type;
784 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
785 s390int->parm);
786 break;
ba5c1e9b
CO		 787 case KVM_S390_SIGP_STOP:
788 case KVM_S390_RESTART:
82a12737
JH		 789 VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
790 inti->type = s390int->type;
791 break;
7697e71f 792 case KVM_S390_INT_EXTERNAL_CALL:
82a12737
JH		 793 if (s390int->parm & 0xffff0000) {
794 kfree(inti);
795 return -EINVAL;
796 }
797 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
798 s390int->parm);
799 inti->type = s390int->type;
800 inti->extcall.code = s390int->parm;
801 break;
ba5c1e9b 802 case KVM_S390_INT_EMERGENCY:
82a12737
JH		 803 if (s390int->parm & 0xffff0000) {
804 kfree(inti);
805 return -EINVAL;
806 }
807 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm);
ba5c1e9b 808 inti->type = s390int->type;
82a12737 809 inti->emerg.code = s390int->parm;
ba5c1e9b 810 break;
48a3e950
CH		 811 case KVM_S390_MCHK:
812 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
813 s390int->parm64);
814 inti->type = s390int->type;
815 inti->mchk.mcic = s390int->parm64;
816 break;
ba5c1e9b
CO		 817 case KVM_S390_INT_VIRTIO:
818 case KVM_S390_INT_SERVICE:
d8346b7d 819 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b
CO		 820 default:
821 kfree(inti);
822 return -EINVAL;
823 }
ade38c31
CH		 824 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm,
825 s390int->parm64, 2);
ba5c1e9b
CO		 826
827 mutex_lock(&vcpu->kvm->lock);
828 li = &vcpu->arch.local_int;
829 spin_lock_bh(&li->lock);
830 if (inti->type == KVM_S390_PROGRAM_INT)
831 list_add(&inti->list, &li->list);
832 else
833 list_add_tail(&inti->list, &li->list);
834 atomic_set(&li->active, 1);
835 if (inti->type == KVM_S390_SIGP_STOP)
836 li->action_bits |= ACTION_STOP_ON_STOP;
837 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
d0321a24
CB		 838 if (waitqueue_active(&vcpu->wq))
839 wake_up_interruptible(&vcpu->wq);
ba5c1e9b
CO		 840 spin_unlock_bh(&li->lock);
841 mutex_unlock(&vcpu->kvm->lock);
842 return 0;
843}
Linux kernel - Deliverables
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