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 | ||
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" | |
22 | ||
23 | static int psw_extint_disabled(struct kvm_vcpu *vcpu) | |
24 | { | |
25 | return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); | |
26 | } | |
27 | ||
28 | static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) | |
29 | { | |
30 | if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) || | |
31 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) || | |
32 | (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT)) | |
33 | return 0; | |
34 | return 1; | |
35 | } | |
36 | ||
37 | static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu, | |
180c12fb | 38 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
39 | { |
40 | switch (inti->type) { | |
41 | case KVM_S390_INT_EMERGENCY: | |
42 | if (psw_extint_disabled(vcpu)) | |
43 | return 0; | |
44 | if (vcpu->arch.sie_block->gcr[0] & 0x4000ul) | |
45 | return 1; | |
46 | return 0; | |
47 | case KVM_S390_INT_SERVICE: | |
48 | if (psw_extint_disabled(vcpu)) | |
49 | return 0; | |
50 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
51 | return 1; | |
52 | return 0; | |
53 | case KVM_S390_INT_VIRTIO: | |
54 | if (psw_extint_disabled(vcpu)) | |
55 | return 0; | |
56 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
57 | return 1; | |
58 | return 0; | |
59 | case KVM_S390_PROGRAM_INT: | |
60 | case KVM_S390_SIGP_STOP: | |
61 | case KVM_S390_SIGP_SET_PREFIX: | |
62 | case KVM_S390_RESTART: | |
63 | return 1; | |
64 | default: | |
65 | BUG(); | |
66 | } | |
67 | return 0; | |
68 | } | |
69 | ||
70 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) | |
71 | { | |
72 | BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); | |
73 | atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); | |
74 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
75 | } | |
76 | ||
77 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
78 | { | |
79 | BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); | |
80 | atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); | |
81 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
82 | } | |
83 | ||
84 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
85 | { | |
86 | atomic_clear_mask(CPUSTAT_ECALL_PEND | | |
87 | CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, | |
88 | &vcpu->arch.sie_block->cpuflags); | |
89 | vcpu->arch.sie_block->lctl = 0x0000; | |
90 | } | |
91 | ||
92 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
93 | { | |
94 | atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags); | |
95 | } | |
96 | ||
97 | static void __set_intercept_indicator(struct kvm_vcpu *vcpu, | |
180c12fb | 98 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
99 | { |
100 | switch (inti->type) { | |
101 | case KVM_S390_INT_EMERGENCY: | |
102 | case KVM_S390_INT_SERVICE: | |
103 | case KVM_S390_INT_VIRTIO: | |
104 | if (psw_extint_disabled(vcpu)) | |
105 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
106 | else | |
107 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
108 | break; | |
109 | case KVM_S390_SIGP_STOP: | |
110 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
111 | break; | |
112 | default: | |
113 | BUG(); | |
114 | } | |
115 | } | |
116 | ||
117 | static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, | |
180c12fb | 118 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
119 | { |
120 | const unsigned short table[] = { 2, 4, 4, 6 }; | |
121 | int rc, exception = 0; | |
122 | ||
123 | switch (inti->type) { | |
124 | case KVM_S390_INT_EMERGENCY: | |
125 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg"); | |
126 | vcpu->stat.deliver_emergency_signal++; | |
127 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1201); | |
128 | if (rc == -EFAULT) | |
129 | exception = 1; | |
130 | ||
131 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
132 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
133 | if (rc == -EFAULT) | |
134 | exception = 1; | |
135 | ||
136 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
137 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
138 | if (rc == -EFAULT) | |
139 | exception = 1; | |
140 | break; | |
141 | ||
142 | case KVM_S390_INT_SERVICE: | |
143 | VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x", | |
144 | inti->ext.ext_params); | |
145 | vcpu->stat.deliver_service_signal++; | |
146 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2401); | |
147 | if (rc == -EFAULT) | |
148 | exception = 1; | |
149 | ||
150 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
151 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
152 | if (rc == -EFAULT) | |
153 | exception = 1; | |
154 | ||
155 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
156 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
157 | if (rc == -EFAULT) | |
158 | exception = 1; | |
159 | ||
160 | rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); | |
161 | if (rc == -EFAULT) | |
162 | exception = 1; | |
163 | break; | |
164 | ||
165 | case KVM_S390_INT_VIRTIO: | |
33e19115 | 166 | VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx", |
ba5c1e9b CO |
167 | inti->ext.ext_params, inti->ext.ext_params2); |
168 | vcpu->stat.deliver_virtio_interrupt++; | |
169 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2603); | |
170 | if (rc == -EFAULT) | |
171 | exception = 1; | |
172 | ||
173 | rc = put_guest_u16(vcpu, __LC_CPU_ADDRESS, 0x0d00); | |
174 | if (rc == -EFAULT) | |
175 | exception = 1; | |
176 | ||
177 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
178 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
179 | if (rc == -EFAULT) | |
180 | exception = 1; | |
181 | ||
182 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
183 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
184 | if (rc == -EFAULT) | |
185 | exception = 1; | |
186 | ||
187 | rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); | |
188 | if (rc == -EFAULT) | |
189 | exception = 1; | |
190 | ||
cbb870c8 HC |
191 | rc = put_guest_u64(vcpu, __LC_EXT_PARAMS2, |
192 | inti->ext.ext_params2); | |
ba5c1e9b CO |
193 | if (rc == -EFAULT) |
194 | exception = 1; | |
195 | break; | |
196 | ||
197 | case KVM_S390_SIGP_STOP: | |
198 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop"); | |
199 | vcpu->stat.deliver_stop_signal++; | |
200 | __set_intercept_indicator(vcpu, inti); | |
201 | break; | |
202 | ||
203 | case KVM_S390_SIGP_SET_PREFIX: | |
204 | VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", | |
205 | inti->prefix.address); | |
206 | vcpu->stat.deliver_prefix_signal++; | |
207 | vcpu->arch.sie_block->prefix = inti->prefix.address; | |
208 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
209 | break; | |
210 | ||
211 | case KVM_S390_RESTART: | |
212 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart"); | |
213 | vcpu->stat.deliver_restart_signal++; | |
214 | rc = copy_to_guest(vcpu, offsetof(struct _lowcore, | |
215 | restart_old_psw), &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
216 | if (rc == -EFAULT) | |
217 | exception = 1; | |
218 | ||
219 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
220 | offsetof(struct _lowcore, restart_psw), sizeof(psw_t)); | |
221 | if (rc == -EFAULT) | |
222 | exception = 1; | |
223 | break; | |
224 | ||
225 | case KVM_S390_PROGRAM_INT: | |
226 | VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x", | |
227 | inti->pgm.code, | |
228 | table[vcpu->arch.sie_block->ipa >> 14]); | |
229 | vcpu->stat.deliver_program_int++; | |
230 | rc = put_guest_u16(vcpu, __LC_PGM_INT_CODE, inti->pgm.code); | |
231 | if (rc == -EFAULT) | |
232 | exception = 1; | |
233 | ||
234 | rc = put_guest_u16(vcpu, __LC_PGM_ILC, | |
235 | table[vcpu->arch.sie_block->ipa >> 14]); | |
236 | if (rc == -EFAULT) | |
237 | exception = 1; | |
238 | ||
239 | rc = copy_to_guest(vcpu, __LC_PGM_OLD_PSW, | |
240 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
241 | if (rc == -EFAULT) | |
242 | exception = 1; | |
243 | ||
244 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
245 | __LC_PGM_NEW_PSW, sizeof(psw_t)); | |
246 | if (rc == -EFAULT) | |
247 | exception = 1; | |
248 | break; | |
249 | ||
250 | default: | |
251 | BUG(); | |
252 | } | |
ba5c1e9b | 253 | if (exception) { |
3cd61299 CB |
254 | printk("kvm: The guest lowcore is not mapped during interrupt " |
255 | "delivery, killing userspace\n"); | |
256 | do_exit(SIGKILL); | |
ba5c1e9b CO |
257 | } |
258 | } | |
259 | ||
260 | static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu) | |
261 | { | |
262 | int rc, exception = 0; | |
263 | ||
264 | if (psw_extint_disabled(vcpu)) | |
265 | return 0; | |
266 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
267 | return 0; | |
268 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1004); | |
269 | if (rc == -EFAULT) | |
270 | exception = 1; | |
271 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
272 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
273 | if (rc == -EFAULT) | |
274 | exception = 1; | |
275 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
276 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
277 | if (rc == -EFAULT) | |
278 | exception = 1; | |
ba5c1e9b | 279 | if (exception) { |
3cd61299 CB |
280 | printk("kvm: The guest lowcore is not mapped during interrupt " |
281 | "delivery, killing userspace\n"); | |
282 | do_exit(SIGKILL); | |
ba5c1e9b | 283 | } |
ba5c1e9b CO |
284 | return 1; |
285 | } | |
286 | ||
a1b37100 | 287 | static int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) |
ba5c1e9b | 288 | { |
180c12fb CB |
289 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
290 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
291 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
292 | int rc = 0; |
293 | ||
294 | if (atomic_read(&li->active)) { | |
295 | spin_lock_bh(&li->lock); | |
296 | list_for_each_entry(inti, &li->list, list) | |
297 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
298 | rc = 1; | |
299 | break; | |
300 | } | |
301 | spin_unlock_bh(&li->lock); | |
302 | } | |
303 | ||
304 | if ((!rc) && atomic_read(&fi->active)) { | |
b037a4f3 | 305 | spin_lock(&fi->lock); |
ba5c1e9b CO |
306 | list_for_each_entry(inti, &fi->list, list) |
307 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
308 | rc = 1; | |
309 | break; | |
310 | } | |
b037a4f3 | 311 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
312 | } |
313 | ||
314 | if ((!rc) && (vcpu->arch.sie_block->ckc < | |
315 | get_clock() + vcpu->arch.sie_block->epoch)) { | |
316 | if ((!psw_extint_disabled(vcpu)) && | |
317 | (vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
318 | rc = 1; | |
319 | } | |
320 | ||
321 | return rc; | |
322 | } | |
323 | ||
3d80840d MT |
324 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
325 | { | |
326 | return 0; | |
327 | } | |
328 | ||
ba5c1e9b CO |
329 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
330 | { | |
331 | u64 now, sltime; | |
332 | DECLARE_WAITQUEUE(wait, current); | |
333 | ||
334 | vcpu->stat.exit_wait_state++; | |
335 | if (kvm_cpu_has_interrupt(vcpu)) | |
336 | return 0; | |
337 | ||
e52b2af5 CO |
338 | __set_cpu_idle(vcpu); |
339 | spin_lock_bh(&vcpu->arch.local_int.lock); | |
340 | vcpu->arch.local_int.timer_due = 0; | |
341 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
342 | ||
ba5c1e9b CO |
343 | if (psw_interrupts_disabled(vcpu)) { |
344 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
345 | __unset_cpu_idle(vcpu); | |
b8e660b8 | 346 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
347 | } |
348 | ||
349 | if (psw_extint_disabled(vcpu) || | |
350 | (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))) { | |
351 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); | |
352 | goto no_timer; | |
353 | } | |
354 | ||
355 | now = get_clock() + vcpu->arch.sie_block->epoch; | |
356 | if (vcpu->arch.sie_block->ckc < now) { | |
357 | __unset_cpu_idle(vcpu); | |
358 | return 0; | |
359 | } | |
360 | ||
ca872302 | 361 | sltime = ((vcpu->arch.sie_block->ckc - now)*125)>>9; |
ba5c1e9b | 362 | |
ca872302 CB |
363 | hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
364 | VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime); | |
ba5c1e9b | 365 | no_timer: |
b037a4f3 | 366 | spin_lock(&vcpu->arch.local_int.float_int->lock); |
ba5c1e9b | 367 | spin_lock_bh(&vcpu->arch.local_int.lock); |
ba5c1e9b CO |
368 | add_wait_queue(&vcpu->arch.local_int.wq, &wait); |
369 | while (list_empty(&vcpu->arch.local_int.list) && | |
370 | list_empty(&vcpu->arch.local_int.float_int->list) && | |
371 | (!vcpu->arch.local_int.timer_due) && | |
372 | !signal_pending(current)) { | |
373 | set_current_state(TASK_INTERRUPTIBLE); | |
374 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
b037a4f3 | 375 | spin_unlock(&vcpu->arch.local_int.float_int->lock); |
ba5c1e9b CO |
376 | vcpu_put(vcpu); |
377 | schedule(); | |
378 | vcpu_load(vcpu); | |
b037a4f3 | 379 | spin_lock(&vcpu->arch.local_int.float_int->lock); |
ba5c1e9b CO |
380 | spin_lock_bh(&vcpu->arch.local_int.lock); |
381 | } | |
382 | __unset_cpu_idle(vcpu); | |
383 | __set_current_state(TASK_RUNNING); | |
d3bc2f91 | 384 | remove_wait_queue(&vcpu->arch.local_int.wq, &wait); |
ba5c1e9b | 385 | spin_unlock_bh(&vcpu->arch.local_int.lock); |
b037a4f3 | 386 | spin_unlock(&vcpu->arch.local_int.float_int->lock); |
ca872302 | 387 | hrtimer_try_to_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
388 | return 0; |
389 | } | |
390 | ||
ca872302 | 391 | void kvm_s390_tasklet(unsigned long parm) |
ba5c1e9b | 392 | { |
ca872302 | 393 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm; |
ba5c1e9b | 394 | |
ca872302 | 395 | spin_lock(&vcpu->arch.local_int.lock); |
ba5c1e9b CO |
396 | vcpu->arch.local_int.timer_due = 1; |
397 | if (waitqueue_active(&vcpu->arch.local_int.wq)) | |
398 | wake_up_interruptible(&vcpu->arch.local_int.wq); | |
ca872302 | 399 | spin_unlock(&vcpu->arch.local_int.lock); |
ba5c1e9b CO |
400 | } |
401 | ||
ca872302 CB |
402 | /* |
403 | * low level hrtimer wake routine. Because this runs in hardirq context | |
404 | * we schedule a tasklet to do the real work. | |
405 | */ | |
406 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) | |
407 | { | |
408 | struct kvm_vcpu *vcpu; | |
409 | ||
410 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
411 | tasklet_schedule(&vcpu->arch.tasklet); | |
412 | ||
413 | return HRTIMER_NORESTART; | |
414 | } | |
ba5c1e9b CO |
415 | |
416 | void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) | |
417 | { | |
180c12fb CB |
418 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
419 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
420 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
ba5c1e9b CO |
421 | int deliver; |
422 | ||
423 | __reset_intercept_indicators(vcpu); | |
424 | if (atomic_read(&li->active)) { | |
425 | do { | |
426 | deliver = 0; | |
427 | spin_lock_bh(&li->lock); | |
428 | list_for_each_entry_safe(inti, n, &li->list, list) { | |
429 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
430 | list_del(&inti->list); | |
431 | deliver = 1; | |
432 | break; | |
433 | } | |
434 | __set_intercept_indicator(vcpu, inti); | |
435 | } | |
436 | if (list_empty(&li->list)) | |
437 | atomic_set(&li->active, 0); | |
438 | spin_unlock_bh(&li->lock); | |
439 | if (deliver) { | |
440 | __do_deliver_interrupt(vcpu, inti); | |
441 | kfree(inti); | |
442 | } | |
443 | } while (deliver); | |
444 | } | |
445 | ||
446 | if ((vcpu->arch.sie_block->ckc < | |
447 | get_clock() + vcpu->arch.sie_block->epoch)) | |
448 | __try_deliver_ckc_interrupt(vcpu); | |
449 | ||
450 | if (atomic_read(&fi->active)) { | |
451 | do { | |
452 | deliver = 0; | |
b037a4f3 | 453 | spin_lock(&fi->lock); |
ba5c1e9b CO |
454 | list_for_each_entry_safe(inti, n, &fi->list, list) { |
455 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
456 | list_del(&inti->list); | |
457 | deliver = 1; | |
458 | break; | |
459 | } | |
460 | __set_intercept_indicator(vcpu, inti); | |
461 | } | |
462 | if (list_empty(&fi->list)) | |
463 | atomic_set(&fi->active, 0); | |
b037a4f3 | 464 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
465 | if (deliver) { |
466 | __do_deliver_interrupt(vcpu, inti); | |
467 | kfree(inti); | |
468 | } | |
469 | } while (deliver); | |
470 | } | |
471 | } | |
472 | ||
473 | int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) | |
474 | { | |
180c12fb CB |
475 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
476 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
477 | |
478 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
479 | if (!inti) | |
480 | return -ENOMEM; | |
481 | ||
a419aef8 | 482 | inti->type = KVM_S390_PROGRAM_INT; |
ba5c1e9b CO |
483 | inti->pgm.code = code; |
484 | ||
485 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code); | |
486 | spin_lock_bh(&li->lock); | |
487 | list_add(&inti->list, &li->list); | |
488 | atomic_set(&li->active, 1); | |
489 | BUG_ON(waitqueue_active(&li->wq)); | |
490 | spin_unlock_bh(&li->lock); | |
491 | return 0; | |
492 | } | |
493 | ||
494 | int kvm_s390_inject_vm(struct kvm *kvm, | |
495 | struct kvm_s390_interrupt *s390int) | |
496 | { | |
180c12fb CB |
497 | struct kvm_s390_local_interrupt *li; |
498 | struct kvm_s390_float_interrupt *fi; | |
499 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
500 | int sigcpu; |
501 | ||
502 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
503 | if (!inti) | |
504 | return -ENOMEM; | |
505 | ||
506 | switch (s390int->type) { | |
507 | case KVM_S390_INT_VIRTIO: | |
33e19115 | 508 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b CO |
509 | s390int->parm, s390int->parm64); |
510 | inti->type = s390int->type; | |
511 | inti->ext.ext_params = s390int->parm; | |
512 | inti->ext.ext_params2 = s390int->parm64; | |
513 | break; | |
514 | case KVM_S390_INT_SERVICE: | |
515 | VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm); | |
516 | inti->type = s390int->type; | |
517 | inti->ext.ext_params = s390int->parm; | |
518 | break; | |
519 | case KVM_S390_PROGRAM_INT: | |
520 | case KVM_S390_SIGP_STOP: | |
521 | case KVM_S390_INT_EMERGENCY: | |
522 | default: | |
523 | kfree(inti); | |
524 | return -EINVAL; | |
525 | } | |
526 | ||
527 | mutex_lock(&kvm->lock); | |
528 | fi = &kvm->arch.float_int; | |
b037a4f3 | 529 | spin_lock(&fi->lock); |
ba5c1e9b CO |
530 | list_add_tail(&inti->list, &fi->list); |
531 | atomic_set(&fi->active, 1); | |
532 | sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS); | |
533 | if (sigcpu == KVM_MAX_VCPUS) { | |
534 | do { | |
535 | sigcpu = fi->next_rr_cpu++; | |
536 | if (sigcpu == KVM_MAX_VCPUS) | |
537 | sigcpu = fi->next_rr_cpu = 0; | |
538 | } while (fi->local_int[sigcpu] == NULL); | |
539 | } | |
540 | li = fi->local_int[sigcpu]; | |
541 | spin_lock_bh(&li->lock); | |
542 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
543 | if (waitqueue_active(&li->wq)) | |
544 | wake_up_interruptible(&li->wq); | |
545 | spin_unlock_bh(&li->lock); | |
b037a4f3 | 546 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
547 | mutex_unlock(&kvm->lock); |
548 | return 0; | |
549 | } | |
550 | ||
551 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, | |
552 | struct kvm_s390_interrupt *s390int) | |
553 | { | |
180c12fb CB |
554 | struct kvm_s390_local_interrupt *li; |
555 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
556 | |
557 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
558 | if (!inti) | |
559 | return -ENOMEM; | |
560 | ||
561 | switch (s390int->type) { | |
562 | case KVM_S390_PROGRAM_INT: | |
563 | if (s390int->parm & 0xffff0000) { | |
564 | kfree(inti); | |
565 | return -EINVAL; | |
566 | } | |
567 | inti->type = s390int->type; | |
568 | inti->pgm.code = s390int->parm; | |
569 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)", | |
570 | s390int->parm); | |
571 | break; | |
b7e6e4d3 CB |
572 | case KVM_S390_SIGP_SET_PREFIX: |
573 | inti->prefix.address = s390int->parm; | |
574 | inti->type = s390int->type; | |
575 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)", | |
576 | s390int->parm); | |
577 | break; | |
ba5c1e9b CO |
578 | case KVM_S390_SIGP_STOP: |
579 | case KVM_S390_RESTART: | |
ba5c1e9b CO |
580 | case KVM_S390_INT_EMERGENCY: |
581 | VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); | |
582 | inti->type = s390int->type; | |
583 | break; | |
584 | case KVM_S390_INT_VIRTIO: | |
585 | case KVM_S390_INT_SERVICE: | |
586 | default: | |
587 | kfree(inti); | |
588 | return -EINVAL; | |
589 | } | |
590 | ||
591 | mutex_lock(&vcpu->kvm->lock); | |
592 | li = &vcpu->arch.local_int; | |
593 | spin_lock_bh(&li->lock); | |
594 | if (inti->type == KVM_S390_PROGRAM_INT) | |
595 | list_add(&inti->list, &li->list); | |
596 | else | |
597 | list_add_tail(&inti->list, &li->list); | |
598 | atomic_set(&li->active, 1); | |
599 | if (inti->type == KVM_S390_SIGP_STOP) | |
600 | li->action_bits |= ACTION_STOP_ON_STOP; | |
601 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
602 | if (waitqueue_active(&li->wq)) | |
603 | wake_up_interruptible(&vcpu->arch.local_int.wq); | |
604 | spin_unlock_bh(&li->lock); | |
605 | mutex_unlock(&vcpu->kvm->lock); | |
606 | return 0; | |
607 | } |