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> | |
ca872302 CB |
15 | #include <linux/hrtimer.h> |
16 | #include <linux/interrupt.h> | |
ba5c1e9b | 17 | #include <linux/kvm_host.h> |
3cd61299 | 18 | #include <linux/signal.h> |
ba5c1e9b CO |
19 | #include "kvm-s390.h" |
20 | #include "gaccess.h" | |
21 | ||
22 | static int psw_extint_disabled(struct kvm_vcpu *vcpu) | |
23 | { | |
24 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
25 | } | |
26 | ||
27 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) | |
28 | { | |
29 | if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) || | |
30 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) || | |
31 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT)) | |
32 | return 0; | |
33 | return 1; | |
34 | } | |
35 | ||
36 | static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu, | |
180c12fb | 37 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
38 | { |
39 | switch (inti->type) { | |
40 | case KVM_S390_INT_EMERGENCY: | |
41 | if (psw_extint_disabled(vcpu)) | |
42 | return 0; | |
43 | if (vcpu->arch.sie_block->gcr[0] & 0x4000ul) | |
44 | return 1; | |
45 | return 0; | |
46 | case KVM_S390_INT_SERVICE: | |
47 | if (psw_extint_disabled(vcpu)) | |
48 | return 0; | |
49 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
50 | return 1; | |
51 | return 0; | |
52 | case KVM_S390_INT_VIRTIO: | |
53 | if (psw_extint_disabled(vcpu)) | |
54 | return 0; | |
55 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
56 | return 1; | |
57 | return 0; | |
58 | case KVM_S390_PROGRAM_INT: | |
59 | case KVM_S390_SIGP_STOP: | |
60 | case KVM_S390_SIGP_SET_PREFIX: | |
61 | case KVM_S390_RESTART: | |
62 | return 1; | |
63 | default: | |
64 | BUG(); | |
65 | } | |
66 | return 0; | |
67 | } | |
68 | ||
69 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) | |
70 | { | |
71 | BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); | |
72 | atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); | |
73 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
74 | } | |
75 | ||
76 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
77 | { | |
78 | BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); | |
79 | atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); | |
80 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
81 | } | |
82 | ||
83 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
84 | { | |
85 | atomic_clear_mask(CPUSTAT_ECALL_PEND | | |
86 | CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, | |
87 | &vcpu->arch.sie_block->cpuflags); | |
88 | vcpu->arch.sie_block->lctl = 0x0000; | |
89 | } | |
90 | ||
91 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
92 | { | |
93 | atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags); | |
94 | } | |
95 | ||
96 | static void __set_intercept_indicator(struct kvm_vcpu *vcpu, | |
180c12fb | 97 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
98 | { |
99 | switch (inti->type) { | |
100 | case KVM_S390_INT_EMERGENCY: | |
101 | case KVM_S390_INT_SERVICE: | |
102 | case KVM_S390_INT_VIRTIO: | |
103 | if (psw_extint_disabled(vcpu)) | |
104 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
105 | else | |
106 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
107 | break; | |
108 | case KVM_S390_SIGP_STOP: | |
109 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
110 | break; | |
111 | default: | |
112 | BUG(); | |
113 | } | |
114 | } | |
115 | ||
116 | static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, | |
180c12fb | 117 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
118 | { |
119 | const unsigned short table[] = { 2, 4, 4, 6 }; | |
120 | int rc, exception = 0; | |
121 | ||
122 | switch (inti->type) { | |
123 | case KVM_S390_INT_EMERGENCY: | |
124 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg"); | |
125 | vcpu->stat.deliver_emergency_signal++; | |
126 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1201); | |
127 | if (rc == -EFAULT) | |
128 | exception = 1; | |
129 | ||
130 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
131 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
132 | if (rc == -EFAULT) | |
133 | exception = 1; | |
134 | ||
135 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
136 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
137 | if (rc == -EFAULT) | |
138 | exception = 1; | |
139 | break; | |
140 | ||
141 | case KVM_S390_INT_SERVICE: | |
142 | VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x", | |
143 | inti->ext.ext_params); | |
144 | vcpu->stat.deliver_service_signal++; | |
145 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2401); | |
146 | if (rc == -EFAULT) | |
147 | exception = 1; | |
148 | ||
149 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
150 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
151 | if (rc == -EFAULT) | |
152 | exception = 1; | |
153 | ||
154 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
155 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
156 | if (rc == -EFAULT) | |
157 | exception = 1; | |
158 | ||
159 | rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); | |
160 | if (rc == -EFAULT) | |
161 | exception = 1; | |
162 | break; | |
163 | ||
164 | case KVM_S390_INT_VIRTIO: | |
33e19115 | 165 | VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx", |
ba5c1e9b CO |
166 | inti->ext.ext_params, inti->ext.ext_params2); |
167 | vcpu->stat.deliver_virtio_interrupt++; | |
168 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2603); | |
169 | if (rc == -EFAULT) | |
170 | exception = 1; | |
171 | ||
172 | rc = put_guest_u16(vcpu, __LC_CPU_ADDRESS, 0x0d00); | |
173 | if (rc == -EFAULT) | |
174 | exception = 1; | |
175 | ||
176 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
177 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
178 | if (rc == -EFAULT) | |
179 | exception = 1; | |
180 | ||
181 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
182 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
183 | if (rc == -EFAULT) | |
184 | exception = 1; | |
185 | ||
186 | rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); | |
187 | if (rc == -EFAULT) | |
188 | exception = 1; | |
189 | ||
190 | rc = put_guest_u64(vcpu, __LC_PFAULT_INTPARM, | |
191 | inti->ext.ext_params2); | |
192 | if (rc == -EFAULT) | |
193 | exception = 1; | |
194 | break; | |
195 | ||
196 | case KVM_S390_SIGP_STOP: | |
197 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop"); | |
198 | vcpu->stat.deliver_stop_signal++; | |
199 | __set_intercept_indicator(vcpu, inti); | |
200 | break; | |
201 | ||
202 | case KVM_S390_SIGP_SET_PREFIX: | |
203 | VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", | |
204 | inti->prefix.address); | |
205 | vcpu->stat.deliver_prefix_signal++; | |
206 | vcpu->arch.sie_block->prefix = inti->prefix.address; | |
207 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
208 | break; | |
209 | ||
210 | case KVM_S390_RESTART: | |
211 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart"); | |
212 | vcpu->stat.deliver_restart_signal++; | |
213 | rc = copy_to_guest(vcpu, offsetof(struct _lowcore, | |
214 | restart_old_psw), &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
215 | if (rc == -EFAULT) | |
216 | exception = 1; | |
217 | ||
218 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
219 | offsetof(struct _lowcore, restart_psw), sizeof(psw_t)); | |
220 | if (rc == -EFAULT) | |
221 | exception = 1; | |
222 | break; | |
223 | ||
224 | case KVM_S390_PROGRAM_INT: | |
225 | VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x", | |
226 | inti->pgm.code, | |
227 | table[vcpu->arch.sie_block->ipa >> 14]); | |
228 | vcpu->stat.deliver_program_int++; | |
229 | rc = put_guest_u16(vcpu, __LC_PGM_INT_CODE, inti->pgm.code); | |
230 | if (rc == -EFAULT) | |
231 | exception = 1; | |
232 | ||
233 | rc = put_guest_u16(vcpu, __LC_PGM_ILC, | |
234 | table[vcpu->arch.sie_block->ipa >> 14]); | |
235 | if (rc == -EFAULT) | |
236 | exception = 1; | |
237 | ||
238 | rc = copy_to_guest(vcpu, __LC_PGM_OLD_PSW, | |
239 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
240 | if (rc == -EFAULT) | |
241 | exception = 1; | |
242 | ||
243 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
244 | __LC_PGM_NEW_PSW, sizeof(psw_t)); | |
245 | if (rc == -EFAULT) | |
246 | exception = 1; | |
247 | break; | |
248 | ||
249 | default: | |
250 | BUG(); | |
251 | } | |
ba5c1e9b | 252 | if (exception) { |
3cd61299 CB |
253 | printk("kvm: The guest lowcore is not mapped during interrupt " |
254 | "delivery, killing userspace\n"); | |
255 | do_exit(SIGKILL); | |
ba5c1e9b CO |
256 | } |
257 | } | |
258 | ||
259 | static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu) | |
260 | { | |
261 | int rc, exception = 0; | |
262 | ||
263 | if (psw_extint_disabled(vcpu)) | |
264 | return 0; | |
265 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
266 | return 0; | |
267 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1004); | |
268 | if (rc == -EFAULT) | |
269 | exception = 1; | |
270 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
271 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
272 | if (rc == -EFAULT) | |
273 | exception = 1; | |
274 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
275 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
276 | if (rc == -EFAULT) | |
277 | exception = 1; | |
ba5c1e9b | 278 | if (exception) { |
3cd61299 CB |
279 | printk("kvm: The guest lowcore is not mapped during interrupt " |
280 | "delivery, killing userspace\n"); | |
281 | do_exit(SIGKILL); | |
ba5c1e9b | 282 | } |
ba5c1e9b CO |
283 | return 1; |
284 | } | |
285 | ||
286 | int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) | |
287 | { | |
180c12fb CB |
288 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
289 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
290 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
291 | int rc = 0; |
292 | ||
293 | if (atomic_read(&li->active)) { | |
294 | spin_lock_bh(&li->lock); | |
295 | list_for_each_entry(inti, &li->list, list) | |
296 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
297 | rc = 1; | |
298 | break; | |
299 | } | |
300 | spin_unlock_bh(&li->lock); | |
301 | } | |
302 | ||
303 | if ((!rc) && atomic_read(&fi->active)) { | |
b037a4f3 | 304 | spin_lock(&fi->lock); |
ba5c1e9b CO |
305 | list_for_each_entry(inti, &fi->list, list) |
306 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
307 | rc = 1; | |
308 | break; | |
309 | } | |
b037a4f3 | 310 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
311 | } |
312 | ||
313 | if ((!rc) && (vcpu->arch.sie_block->ckc < | |
314 | get_clock() + vcpu->arch.sie_block->epoch)) { | |
315 | if ((!psw_extint_disabled(vcpu)) && | |
316 | (vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
317 | rc = 1; | |
318 | } | |
319 | ||
320 | return rc; | |
321 | } | |
322 | ||
78646121 GN |
323 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) |
324 | { | |
325 | /* do real check here */ | |
326 | return 1; | |
327 | } | |
328 | ||
3d80840d MT |
329 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
330 | { | |
331 | return 0; | |
332 | } | |
333 | ||
ba5c1e9b CO |
334 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
335 | { | |
336 | u64 now, sltime; | |
337 | DECLARE_WAITQUEUE(wait, current); | |
338 | ||
339 | vcpu->stat.exit_wait_state++; | |
340 | if (kvm_cpu_has_interrupt(vcpu)) | |
341 | return 0; | |
342 | ||
e52b2af5 CO |
343 | __set_cpu_idle(vcpu); |
344 | spin_lock_bh(&vcpu->arch.local_int.lock); | |
345 | vcpu->arch.local_int.timer_due = 0; | |
346 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
347 | ||
ba5c1e9b CO |
348 | if (psw_interrupts_disabled(vcpu)) { |
349 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
350 | __unset_cpu_idle(vcpu); | |
351 | return -ENOTSUPP; /* disabled wait */ | |
352 | } | |
353 | ||
354 | if (psw_extint_disabled(vcpu) || | |
355 | (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))) { | |
356 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); | |
357 | goto no_timer; | |
358 | } | |
359 | ||
360 | now = get_clock() + vcpu->arch.sie_block->epoch; | |
361 | if (vcpu->arch.sie_block->ckc < now) { | |
362 | __unset_cpu_idle(vcpu); | |
363 | return 0; | |
364 | } | |
365 | ||
ca872302 | 366 | sltime = ((vcpu->arch.sie_block->ckc - now)*125)>>9; |
ba5c1e9b | 367 | |
ca872302 CB |
368 | hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
369 | VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime); | |
ba5c1e9b | 370 | no_timer: |
b037a4f3 | 371 | spin_lock(&vcpu->arch.local_int.float_int->lock); |
ba5c1e9b | 372 | spin_lock_bh(&vcpu->arch.local_int.lock); |
ba5c1e9b CO |
373 | add_wait_queue(&vcpu->arch.local_int.wq, &wait); |
374 | while (list_empty(&vcpu->arch.local_int.list) && | |
375 | list_empty(&vcpu->arch.local_int.float_int->list) && | |
376 | (!vcpu->arch.local_int.timer_due) && | |
377 | !signal_pending(current)) { | |
378 | set_current_state(TASK_INTERRUPTIBLE); | |
379 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
b037a4f3 | 380 | spin_unlock(&vcpu->arch.local_int.float_int->lock); |
ba5c1e9b CO |
381 | vcpu_put(vcpu); |
382 | schedule(); | |
383 | vcpu_load(vcpu); | |
b037a4f3 | 384 | spin_lock(&vcpu->arch.local_int.float_int->lock); |
ba5c1e9b CO |
385 | spin_lock_bh(&vcpu->arch.local_int.lock); |
386 | } | |
387 | __unset_cpu_idle(vcpu); | |
388 | __set_current_state(TASK_RUNNING); | |
389 | remove_wait_queue(&vcpu->wq, &wait); | |
390 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
b037a4f3 | 391 | spin_unlock(&vcpu->arch.local_int.float_int->lock); |
ca872302 | 392 | hrtimer_try_to_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
393 | return 0; |
394 | } | |
395 | ||
ca872302 | 396 | void kvm_s390_tasklet(unsigned long parm) |
ba5c1e9b | 397 | { |
ca872302 | 398 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm; |
ba5c1e9b | 399 | |
ca872302 | 400 | spin_lock(&vcpu->arch.local_int.lock); |
ba5c1e9b CO |
401 | vcpu->arch.local_int.timer_due = 1; |
402 | if (waitqueue_active(&vcpu->arch.local_int.wq)) | |
403 | wake_up_interruptible(&vcpu->arch.local_int.wq); | |
ca872302 | 404 | spin_unlock(&vcpu->arch.local_int.lock); |
ba5c1e9b CO |
405 | } |
406 | ||
ca872302 CB |
407 | /* |
408 | * low level hrtimer wake routine. Because this runs in hardirq context | |
409 | * we schedule a tasklet to do the real work. | |
410 | */ | |
411 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) | |
412 | { | |
413 | struct kvm_vcpu *vcpu; | |
414 | ||
415 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
416 | tasklet_schedule(&vcpu->arch.tasklet); | |
417 | ||
418 | return HRTIMER_NORESTART; | |
419 | } | |
ba5c1e9b CO |
420 | |
421 | void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) | |
422 | { | |
180c12fb CB |
423 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
424 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
425 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
ba5c1e9b CO |
426 | int deliver; |
427 | ||
428 | __reset_intercept_indicators(vcpu); | |
429 | if (atomic_read(&li->active)) { | |
430 | do { | |
431 | deliver = 0; | |
432 | spin_lock_bh(&li->lock); | |
433 | list_for_each_entry_safe(inti, n, &li->list, list) { | |
434 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
435 | list_del(&inti->list); | |
436 | deliver = 1; | |
437 | break; | |
438 | } | |
439 | __set_intercept_indicator(vcpu, inti); | |
440 | } | |
441 | if (list_empty(&li->list)) | |
442 | atomic_set(&li->active, 0); | |
443 | spin_unlock_bh(&li->lock); | |
444 | if (deliver) { | |
445 | __do_deliver_interrupt(vcpu, inti); | |
446 | kfree(inti); | |
447 | } | |
448 | } while (deliver); | |
449 | } | |
450 | ||
451 | if ((vcpu->arch.sie_block->ckc < | |
452 | get_clock() + vcpu->arch.sie_block->epoch)) | |
453 | __try_deliver_ckc_interrupt(vcpu); | |
454 | ||
455 | if (atomic_read(&fi->active)) { | |
456 | do { | |
457 | deliver = 0; | |
b037a4f3 | 458 | spin_lock(&fi->lock); |
ba5c1e9b CO |
459 | list_for_each_entry_safe(inti, n, &fi->list, list) { |
460 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
461 | list_del(&inti->list); | |
462 | deliver = 1; | |
463 | break; | |
464 | } | |
465 | __set_intercept_indicator(vcpu, inti); | |
466 | } | |
467 | if (list_empty(&fi->list)) | |
468 | atomic_set(&fi->active, 0); | |
b037a4f3 | 469 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
470 | if (deliver) { |
471 | __do_deliver_interrupt(vcpu, inti); | |
472 | kfree(inti); | |
473 | } | |
474 | } while (deliver); | |
475 | } | |
476 | } | |
477 | ||
478 | int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) | |
479 | { | |
180c12fb CB |
480 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
481 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
482 | |
483 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
484 | if (!inti) | |
485 | return -ENOMEM; | |
486 | ||
487 | inti->type = KVM_S390_PROGRAM_INT;; | |
488 | inti->pgm.code = code; | |
489 | ||
490 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code); | |
491 | spin_lock_bh(&li->lock); | |
492 | list_add(&inti->list, &li->list); | |
493 | atomic_set(&li->active, 1); | |
494 | BUG_ON(waitqueue_active(&li->wq)); | |
495 | spin_unlock_bh(&li->lock); | |
496 | return 0; | |
497 | } | |
498 | ||
499 | int kvm_s390_inject_vm(struct kvm *kvm, | |
500 | struct kvm_s390_interrupt *s390int) | |
501 | { | |
180c12fb CB |
502 | struct kvm_s390_local_interrupt *li; |
503 | struct kvm_s390_float_interrupt *fi; | |
504 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
505 | int sigcpu; |
506 | ||
507 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
508 | if (!inti) | |
509 | return -ENOMEM; | |
510 | ||
511 | switch (s390int->type) { | |
512 | case KVM_S390_INT_VIRTIO: | |
33e19115 | 513 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b CO |
514 | s390int->parm, s390int->parm64); |
515 | inti->type = s390int->type; | |
516 | inti->ext.ext_params = s390int->parm; | |
517 | inti->ext.ext_params2 = s390int->parm64; | |
518 | break; | |
519 | case KVM_S390_INT_SERVICE: | |
520 | VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm); | |
521 | inti->type = s390int->type; | |
522 | inti->ext.ext_params = s390int->parm; | |
523 | break; | |
524 | case KVM_S390_PROGRAM_INT: | |
525 | case KVM_S390_SIGP_STOP: | |
526 | case KVM_S390_INT_EMERGENCY: | |
527 | default: | |
528 | kfree(inti); | |
529 | return -EINVAL; | |
530 | } | |
531 | ||
532 | mutex_lock(&kvm->lock); | |
533 | fi = &kvm->arch.float_int; | |
b037a4f3 | 534 | spin_lock(&fi->lock); |
ba5c1e9b CO |
535 | list_add_tail(&inti->list, &fi->list); |
536 | atomic_set(&fi->active, 1); | |
537 | sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS); | |
538 | if (sigcpu == KVM_MAX_VCPUS) { | |
539 | do { | |
540 | sigcpu = fi->next_rr_cpu++; | |
541 | if (sigcpu == KVM_MAX_VCPUS) | |
542 | sigcpu = fi->next_rr_cpu = 0; | |
543 | } while (fi->local_int[sigcpu] == NULL); | |
544 | } | |
545 | li = fi->local_int[sigcpu]; | |
546 | spin_lock_bh(&li->lock); | |
547 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
548 | if (waitqueue_active(&li->wq)) | |
549 | wake_up_interruptible(&li->wq); | |
550 | spin_unlock_bh(&li->lock); | |
b037a4f3 | 551 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
552 | mutex_unlock(&kvm->lock); |
553 | return 0; | |
554 | } | |
555 | ||
556 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, | |
557 | struct kvm_s390_interrupt *s390int) | |
558 | { | |
180c12fb CB |
559 | struct kvm_s390_local_interrupt *li; |
560 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
561 | |
562 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
563 | if (!inti) | |
564 | return -ENOMEM; | |
565 | ||
566 | switch (s390int->type) { | |
567 | case KVM_S390_PROGRAM_INT: | |
568 | if (s390int->parm & 0xffff0000) { | |
569 | kfree(inti); | |
570 | return -EINVAL; | |
571 | } | |
572 | inti->type = s390int->type; | |
573 | inti->pgm.code = s390int->parm; | |
574 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)", | |
575 | s390int->parm); | |
576 | break; | |
b7e6e4d3 CB |
577 | case KVM_S390_SIGP_SET_PREFIX: |
578 | inti->prefix.address = s390int->parm; | |
579 | inti->type = s390int->type; | |
580 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)", | |
581 | s390int->parm); | |
582 | break; | |
ba5c1e9b CO |
583 | case KVM_S390_SIGP_STOP: |
584 | case KVM_S390_RESTART: | |
ba5c1e9b CO |
585 | case KVM_S390_INT_EMERGENCY: |
586 | VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); | |
587 | inti->type = s390int->type; | |
588 | break; | |
589 | case KVM_S390_INT_VIRTIO: | |
590 | case KVM_S390_INT_SERVICE: | |
591 | default: | |
592 | kfree(inti); | |
593 | return -EINVAL; | |
594 | } | |
595 | ||
596 | mutex_lock(&vcpu->kvm->lock); | |
597 | li = &vcpu->arch.local_int; | |
598 | spin_lock_bh(&li->lock); | |
599 | if (inti->type == KVM_S390_PROGRAM_INT) | |
600 | list_add(&inti->list, &li->list); | |
601 | else | |
602 | list_add_tail(&inti->list, &li->list); | |
603 | atomic_set(&li->active, 1); | |
604 | if (inti->type == KVM_S390_SIGP_STOP) | |
605 | li->action_bits |= ACTION_STOP_ON_STOP; | |
606 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
607 | if (waitqueue_active(&li->wq)) | |
608 | wake_up_interruptible(&vcpu->arch.local_int.wq); | |
609 | spin_unlock_bh(&li->lock); | |
610 | mutex_unlock(&vcpu->kvm->lock); | |
611 | return 0; | |
612 | } |