Commit | Line | Data |
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ba5c1e9b CO |
1 | /* |
2 | * interrupt.c - handling kvm guest interrupts | |
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 | ||
13 | #include <asm/lowcore.h> | |
14 | #include <asm/uaccess.h> | |
15 | #include <linux/kvm_host.h> | |
3cd61299 | 16 | #include <linux/signal.h> |
ba5c1e9b CO |
17 | #include "kvm-s390.h" |
18 | #include "gaccess.h" | |
19 | ||
20 | static int psw_extint_disabled(struct kvm_vcpu *vcpu) | |
21 | { | |
22 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
23 | } | |
24 | ||
25 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) | |
26 | { | |
27 | if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) || | |
28 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) || | |
29 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT)) | |
30 | return 0; | |
31 | return 1; | |
32 | } | |
33 | ||
34 | static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu, | |
180c12fb | 35 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
36 | { |
37 | switch (inti->type) { | |
38 | case KVM_S390_INT_EMERGENCY: | |
39 | if (psw_extint_disabled(vcpu)) | |
40 | return 0; | |
41 | if (vcpu->arch.sie_block->gcr[0] & 0x4000ul) | |
42 | return 1; | |
43 | return 0; | |
44 | case KVM_S390_INT_SERVICE: | |
45 | if (psw_extint_disabled(vcpu)) | |
46 | return 0; | |
47 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
48 | return 1; | |
49 | return 0; | |
50 | case KVM_S390_INT_VIRTIO: | |
51 | if (psw_extint_disabled(vcpu)) | |
52 | return 0; | |
53 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
54 | return 1; | |
55 | return 0; | |
56 | case KVM_S390_PROGRAM_INT: | |
57 | case KVM_S390_SIGP_STOP: | |
58 | case KVM_S390_SIGP_SET_PREFIX: | |
59 | case KVM_S390_RESTART: | |
60 | return 1; | |
61 | default: | |
62 | BUG(); | |
63 | } | |
64 | return 0; | |
65 | } | |
66 | ||
67 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) | |
68 | { | |
69 | BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); | |
70 | atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); | |
71 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
72 | } | |
73 | ||
74 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
75 | { | |
76 | BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); | |
77 | atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); | |
78 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
79 | } | |
80 | ||
81 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
82 | { | |
83 | atomic_clear_mask(CPUSTAT_ECALL_PEND | | |
84 | CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, | |
85 | &vcpu->arch.sie_block->cpuflags); | |
86 | vcpu->arch.sie_block->lctl = 0x0000; | |
87 | } | |
88 | ||
89 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
90 | { | |
91 | atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags); | |
92 | } | |
93 | ||
94 | static void __set_intercept_indicator(struct kvm_vcpu *vcpu, | |
180c12fb | 95 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
96 | { |
97 | switch (inti->type) { | |
98 | case KVM_S390_INT_EMERGENCY: | |
99 | case KVM_S390_INT_SERVICE: | |
100 | case KVM_S390_INT_VIRTIO: | |
101 | if (psw_extint_disabled(vcpu)) | |
102 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
103 | else | |
104 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
105 | break; | |
106 | case KVM_S390_SIGP_STOP: | |
107 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
108 | break; | |
109 | default: | |
110 | BUG(); | |
111 | } | |
112 | } | |
113 | ||
114 | static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, | |
180c12fb | 115 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
116 | { |
117 | const unsigned short table[] = { 2, 4, 4, 6 }; | |
118 | int rc, exception = 0; | |
119 | ||
120 | switch (inti->type) { | |
121 | case KVM_S390_INT_EMERGENCY: | |
122 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg"); | |
123 | vcpu->stat.deliver_emergency_signal++; | |
124 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1201); | |
125 | if (rc == -EFAULT) | |
126 | exception = 1; | |
127 | ||
128 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
129 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
130 | if (rc == -EFAULT) | |
131 | exception = 1; | |
132 | ||
133 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
134 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
135 | if (rc == -EFAULT) | |
136 | exception = 1; | |
137 | break; | |
138 | ||
139 | case KVM_S390_INT_SERVICE: | |
140 | VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x", | |
141 | inti->ext.ext_params); | |
142 | vcpu->stat.deliver_service_signal++; | |
143 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2401); | |
144 | if (rc == -EFAULT) | |
145 | exception = 1; | |
146 | ||
147 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
148 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
149 | if (rc == -EFAULT) | |
150 | exception = 1; | |
151 | ||
152 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
153 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
154 | if (rc == -EFAULT) | |
155 | exception = 1; | |
156 | ||
157 | rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); | |
158 | if (rc == -EFAULT) | |
159 | exception = 1; | |
160 | break; | |
161 | ||
162 | case KVM_S390_INT_VIRTIO: | |
163 | VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%lx", | |
164 | inti->ext.ext_params, inti->ext.ext_params2); | |
165 | vcpu->stat.deliver_virtio_interrupt++; | |
166 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2603); | |
167 | if (rc == -EFAULT) | |
168 | exception = 1; | |
169 | ||
170 | rc = put_guest_u16(vcpu, __LC_CPU_ADDRESS, 0x0d00); | |
171 | if (rc == -EFAULT) | |
172 | exception = 1; | |
173 | ||
174 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
175 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
176 | if (rc == -EFAULT) | |
177 | exception = 1; | |
178 | ||
179 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
180 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
181 | if (rc == -EFAULT) | |
182 | exception = 1; | |
183 | ||
184 | rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); | |
185 | if (rc == -EFAULT) | |
186 | exception = 1; | |
187 | ||
188 | rc = put_guest_u64(vcpu, __LC_PFAULT_INTPARM, | |
189 | inti->ext.ext_params2); | |
190 | if (rc == -EFAULT) | |
191 | exception = 1; | |
192 | break; | |
193 | ||
194 | case KVM_S390_SIGP_STOP: | |
195 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop"); | |
196 | vcpu->stat.deliver_stop_signal++; | |
197 | __set_intercept_indicator(vcpu, inti); | |
198 | break; | |
199 | ||
200 | case KVM_S390_SIGP_SET_PREFIX: | |
201 | VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", | |
202 | inti->prefix.address); | |
203 | vcpu->stat.deliver_prefix_signal++; | |
204 | vcpu->arch.sie_block->prefix = inti->prefix.address; | |
205 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
206 | break; | |
207 | ||
208 | case KVM_S390_RESTART: | |
209 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart"); | |
210 | vcpu->stat.deliver_restart_signal++; | |
211 | rc = copy_to_guest(vcpu, offsetof(struct _lowcore, | |
212 | restart_old_psw), &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
213 | if (rc == -EFAULT) | |
214 | exception = 1; | |
215 | ||
216 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
217 | offsetof(struct _lowcore, restart_psw), sizeof(psw_t)); | |
218 | if (rc == -EFAULT) | |
219 | exception = 1; | |
220 | break; | |
221 | ||
222 | case KVM_S390_PROGRAM_INT: | |
223 | VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x", | |
224 | inti->pgm.code, | |
225 | table[vcpu->arch.sie_block->ipa >> 14]); | |
226 | vcpu->stat.deliver_program_int++; | |
227 | rc = put_guest_u16(vcpu, __LC_PGM_INT_CODE, inti->pgm.code); | |
228 | if (rc == -EFAULT) | |
229 | exception = 1; | |
230 | ||
231 | rc = put_guest_u16(vcpu, __LC_PGM_ILC, | |
232 | table[vcpu->arch.sie_block->ipa >> 14]); | |
233 | if (rc == -EFAULT) | |
234 | exception = 1; | |
235 | ||
236 | rc = copy_to_guest(vcpu, __LC_PGM_OLD_PSW, | |
237 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
238 | if (rc == -EFAULT) | |
239 | exception = 1; | |
240 | ||
241 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
242 | __LC_PGM_NEW_PSW, sizeof(psw_t)); | |
243 | if (rc == -EFAULT) | |
244 | exception = 1; | |
245 | break; | |
246 | ||
247 | default: | |
248 | BUG(); | |
249 | } | |
ba5c1e9b | 250 | if (exception) { |
3cd61299 CB |
251 | printk("kvm: The guest lowcore is not mapped during interrupt " |
252 | "delivery, killing userspace\n"); | |
253 | do_exit(SIGKILL); | |
ba5c1e9b CO |
254 | } |
255 | } | |
256 | ||
257 | static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu) | |
258 | { | |
259 | int rc, exception = 0; | |
260 | ||
261 | if (psw_extint_disabled(vcpu)) | |
262 | return 0; | |
263 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
264 | return 0; | |
265 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1004); | |
266 | if (rc == -EFAULT) | |
267 | exception = 1; | |
268 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
269 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
270 | if (rc == -EFAULT) | |
271 | exception = 1; | |
272 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
273 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
274 | if (rc == -EFAULT) | |
275 | exception = 1; | |
ba5c1e9b | 276 | if (exception) { |
3cd61299 CB |
277 | printk("kvm: The guest lowcore is not mapped during interrupt " |
278 | "delivery, killing userspace\n"); | |
279 | do_exit(SIGKILL); | |
ba5c1e9b | 280 | } |
ba5c1e9b CO |
281 | return 1; |
282 | } | |
283 | ||
284 | int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) | |
285 | { | |
180c12fb CB |
286 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
287 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
288 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
289 | int rc = 0; |
290 | ||
291 | if (atomic_read(&li->active)) { | |
292 | spin_lock_bh(&li->lock); | |
293 | list_for_each_entry(inti, &li->list, list) | |
294 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
295 | rc = 1; | |
296 | break; | |
297 | } | |
298 | spin_unlock_bh(&li->lock); | |
299 | } | |
300 | ||
301 | if ((!rc) && atomic_read(&fi->active)) { | |
302 | spin_lock_bh(&fi->lock); | |
303 | list_for_each_entry(inti, &fi->list, list) | |
304 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
305 | rc = 1; | |
306 | break; | |
307 | } | |
308 | spin_unlock_bh(&fi->lock); | |
309 | } | |
310 | ||
311 | if ((!rc) && (vcpu->arch.sie_block->ckc < | |
312 | get_clock() + vcpu->arch.sie_block->epoch)) { | |
313 | if ((!psw_extint_disabled(vcpu)) && | |
314 | (vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
315 | rc = 1; | |
316 | } | |
317 | ||
318 | return rc; | |
319 | } | |
320 | ||
3d80840d MT |
321 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
322 | { | |
323 | return 0; | |
324 | } | |
325 | ||
ba5c1e9b CO |
326 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
327 | { | |
328 | u64 now, sltime; | |
329 | DECLARE_WAITQUEUE(wait, current); | |
330 | ||
331 | vcpu->stat.exit_wait_state++; | |
332 | if (kvm_cpu_has_interrupt(vcpu)) | |
333 | return 0; | |
334 | ||
e52b2af5 CO |
335 | __set_cpu_idle(vcpu); |
336 | spin_lock_bh(&vcpu->arch.local_int.lock); | |
337 | vcpu->arch.local_int.timer_due = 0; | |
338 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
339 | ||
ba5c1e9b CO |
340 | if (psw_interrupts_disabled(vcpu)) { |
341 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
342 | __unset_cpu_idle(vcpu); | |
343 | return -ENOTSUPP; /* disabled wait */ | |
344 | } | |
345 | ||
346 | if (psw_extint_disabled(vcpu) || | |
347 | (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))) { | |
348 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); | |
349 | goto no_timer; | |
350 | } | |
351 | ||
352 | now = get_clock() + vcpu->arch.sie_block->epoch; | |
353 | if (vcpu->arch.sie_block->ckc < now) { | |
354 | __unset_cpu_idle(vcpu); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | sltime = (vcpu->arch.sie_block->ckc - now) / (0xf4240000ul / HZ) + 1; | |
359 | ||
360 | vcpu->arch.ckc_timer.expires = jiffies + sltime; | |
361 | ||
362 | add_timer(&vcpu->arch.ckc_timer); | |
363 | VCPU_EVENT(vcpu, 5, "enabled wait timer:%lx jiffies", sltime); | |
364 | no_timer: | |
365 | spin_lock_bh(&vcpu->arch.local_int.float_int->lock); | |
366 | spin_lock_bh(&vcpu->arch.local_int.lock); | |
ba5c1e9b CO |
367 | add_wait_queue(&vcpu->arch.local_int.wq, &wait); |
368 | while (list_empty(&vcpu->arch.local_int.list) && | |
369 | list_empty(&vcpu->arch.local_int.float_int->list) && | |
370 | (!vcpu->arch.local_int.timer_due) && | |
371 | !signal_pending(current)) { | |
372 | set_current_state(TASK_INTERRUPTIBLE); | |
373 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
374 | spin_unlock_bh(&vcpu->arch.local_int.float_int->lock); | |
375 | vcpu_put(vcpu); | |
376 | schedule(); | |
377 | vcpu_load(vcpu); | |
378 | spin_lock_bh(&vcpu->arch.local_int.float_int->lock); | |
379 | spin_lock_bh(&vcpu->arch.local_int.lock); | |
380 | } | |
381 | __unset_cpu_idle(vcpu); | |
382 | __set_current_state(TASK_RUNNING); | |
383 | remove_wait_queue(&vcpu->wq, &wait); | |
384 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
385 | spin_unlock_bh(&vcpu->arch.local_int.float_int->lock); | |
386 | del_timer(&vcpu->arch.ckc_timer); | |
387 | return 0; | |
388 | } | |
389 | ||
390 | void kvm_s390_idle_wakeup(unsigned long data) | |
391 | { | |
392 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; | |
393 | ||
394 | spin_lock_bh(&vcpu->arch.local_int.lock); | |
395 | vcpu->arch.local_int.timer_due = 1; | |
396 | if (waitqueue_active(&vcpu->arch.local_int.wq)) | |
397 | wake_up_interruptible(&vcpu->arch.local_int.wq); | |
398 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
399 | } | |
400 | ||
401 | ||
402 | void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) | |
403 | { | |
180c12fb CB |
404 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
405 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
406 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
ba5c1e9b CO |
407 | int deliver; |
408 | ||
409 | __reset_intercept_indicators(vcpu); | |
410 | if (atomic_read(&li->active)) { | |
411 | do { | |
412 | deliver = 0; | |
413 | spin_lock_bh(&li->lock); | |
414 | list_for_each_entry_safe(inti, n, &li->list, list) { | |
415 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
416 | list_del(&inti->list); | |
417 | deliver = 1; | |
418 | break; | |
419 | } | |
420 | __set_intercept_indicator(vcpu, inti); | |
421 | } | |
422 | if (list_empty(&li->list)) | |
423 | atomic_set(&li->active, 0); | |
424 | spin_unlock_bh(&li->lock); | |
425 | if (deliver) { | |
426 | __do_deliver_interrupt(vcpu, inti); | |
427 | kfree(inti); | |
428 | } | |
429 | } while (deliver); | |
430 | } | |
431 | ||
432 | if ((vcpu->arch.sie_block->ckc < | |
433 | get_clock() + vcpu->arch.sie_block->epoch)) | |
434 | __try_deliver_ckc_interrupt(vcpu); | |
435 | ||
436 | if (atomic_read(&fi->active)) { | |
437 | do { | |
438 | deliver = 0; | |
439 | spin_lock_bh(&fi->lock); | |
440 | list_for_each_entry_safe(inti, n, &fi->list, list) { | |
441 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
442 | list_del(&inti->list); | |
443 | deliver = 1; | |
444 | break; | |
445 | } | |
446 | __set_intercept_indicator(vcpu, inti); | |
447 | } | |
448 | if (list_empty(&fi->list)) | |
449 | atomic_set(&fi->active, 0); | |
450 | spin_unlock_bh(&fi->lock); | |
451 | if (deliver) { | |
452 | __do_deliver_interrupt(vcpu, inti); | |
453 | kfree(inti); | |
454 | } | |
455 | } while (deliver); | |
456 | } | |
457 | } | |
458 | ||
459 | int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) | |
460 | { | |
180c12fb CB |
461 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
462 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
463 | |
464 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
465 | if (!inti) | |
466 | return -ENOMEM; | |
467 | ||
468 | inti->type = KVM_S390_PROGRAM_INT;; | |
469 | inti->pgm.code = code; | |
470 | ||
471 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code); | |
472 | spin_lock_bh(&li->lock); | |
473 | list_add(&inti->list, &li->list); | |
474 | atomic_set(&li->active, 1); | |
475 | BUG_ON(waitqueue_active(&li->wq)); | |
476 | spin_unlock_bh(&li->lock); | |
477 | return 0; | |
478 | } | |
479 | ||
480 | int kvm_s390_inject_vm(struct kvm *kvm, | |
481 | struct kvm_s390_interrupt *s390int) | |
482 | { | |
180c12fb CB |
483 | struct kvm_s390_local_interrupt *li; |
484 | struct kvm_s390_float_interrupt *fi; | |
485 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
486 | int sigcpu; |
487 | ||
488 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
489 | if (!inti) | |
490 | return -ENOMEM; | |
491 | ||
492 | switch (s390int->type) { | |
493 | case KVM_S390_INT_VIRTIO: | |
494 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%lx", | |
495 | s390int->parm, s390int->parm64); | |
496 | inti->type = s390int->type; | |
497 | inti->ext.ext_params = s390int->parm; | |
498 | inti->ext.ext_params2 = s390int->parm64; | |
499 | break; | |
500 | case KVM_S390_INT_SERVICE: | |
501 | VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm); | |
502 | inti->type = s390int->type; | |
503 | inti->ext.ext_params = s390int->parm; | |
504 | break; | |
505 | case KVM_S390_PROGRAM_INT: | |
506 | case KVM_S390_SIGP_STOP: | |
507 | case KVM_S390_INT_EMERGENCY: | |
508 | default: | |
509 | kfree(inti); | |
510 | return -EINVAL; | |
511 | } | |
512 | ||
513 | mutex_lock(&kvm->lock); | |
514 | fi = &kvm->arch.float_int; | |
515 | spin_lock_bh(&fi->lock); | |
516 | list_add_tail(&inti->list, &fi->list); | |
517 | atomic_set(&fi->active, 1); | |
518 | sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS); | |
519 | if (sigcpu == KVM_MAX_VCPUS) { | |
520 | do { | |
521 | sigcpu = fi->next_rr_cpu++; | |
522 | if (sigcpu == KVM_MAX_VCPUS) | |
523 | sigcpu = fi->next_rr_cpu = 0; | |
524 | } while (fi->local_int[sigcpu] == NULL); | |
525 | } | |
526 | li = fi->local_int[sigcpu]; | |
527 | spin_lock_bh(&li->lock); | |
528 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
529 | if (waitqueue_active(&li->wq)) | |
530 | wake_up_interruptible(&li->wq); | |
531 | spin_unlock_bh(&li->lock); | |
532 | spin_unlock_bh(&fi->lock); | |
533 | mutex_unlock(&kvm->lock); | |
534 | return 0; | |
535 | } | |
536 | ||
537 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, | |
538 | struct kvm_s390_interrupt *s390int) | |
539 | { | |
180c12fb CB |
540 | struct kvm_s390_local_interrupt *li; |
541 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
542 | |
543 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
544 | if (!inti) | |
545 | return -ENOMEM; | |
546 | ||
547 | switch (s390int->type) { | |
548 | case KVM_S390_PROGRAM_INT: | |
549 | if (s390int->parm & 0xffff0000) { | |
550 | kfree(inti); | |
551 | return -EINVAL; | |
552 | } | |
553 | inti->type = s390int->type; | |
554 | inti->pgm.code = s390int->parm; | |
555 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)", | |
556 | s390int->parm); | |
557 | break; | |
558 | case KVM_S390_SIGP_STOP: | |
559 | case KVM_S390_RESTART: | |
560 | case KVM_S390_SIGP_SET_PREFIX: | |
561 | case KVM_S390_INT_EMERGENCY: | |
562 | VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); | |
563 | inti->type = s390int->type; | |
564 | break; | |
565 | case KVM_S390_INT_VIRTIO: | |
566 | case KVM_S390_INT_SERVICE: | |
567 | default: | |
568 | kfree(inti); | |
569 | return -EINVAL; | |
570 | } | |
571 | ||
572 | mutex_lock(&vcpu->kvm->lock); | |
573 | li = &vcpu->arch.local_int; | |
574 | spin_lock_bh(&li->lock); | |
575 | if (inti->type == KVM_S390_PROGRAM_INT) | |
576 | list_add(&inti->list, &li->list); | |
577 | else | |
578 | list_add_tail(&inti->list, &li->list); | |
579 | atomic_set(&li->active, 1); | |
580 | if (inti->type == KVM_S390_SIGP_STOP) | |
581 | li->action_bits |= ACTION_STOP_ON_STOP; | |
582 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
583 | if (waitqueue_active(&li->wq)) | |
584 | wake_up_interruptible(&vcpu->arch.local_int.wq); | |
585 | spin_unlock_bh(&li->lock); | |
586 | mutex_unlock(&vcpu->kvm->lock); | |
587 | return 0; | |
588 | } |