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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) { | |
7697e71f CE |
41 | case KVM_S390_INT_EXTERNAL_CALL: |
42 | if (psw_extint_disabled(vcpu)) | |
43 | return 0; | |
44 | if (vcpu->arch.sie_block->gcr[0] & 0x2000ul) | |
45 | return 1; | |
ba5c1e9b CO |
46 | case KVM_S390_INT_EMERGENCY: |
47 | if (psw_extint_disabled(vcpu)) | |
48 | return 0; | |
49 | if (vcpu->arch.sie_block->gcr[0] & 0x4000ul) | |
50 | return 1; | |
51 | return 0; | |
52 | case KVM_S390_INT_SERVICE: | |
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_INT_VIRTIO: | |
59 | if (psw_extint_disabled(vcpu)) | |
60 | return 0; | |
61 | if (vcpu->arch.sie_block->gcr[0] & 0x200ul) | |
62 | return 1; | |
63 | return 0; | |
64 | case KVM_S390_PROGRAM_INT: | |
65 | case KVM_S390_SIGP_STOP: | |
66 | case KVM_S390_SIGP_SET_PREFIX: | |
67 | case KVM_S390_RESTART: | |
68 | return 1; | |
69 | default: | |
70 | BUG(); | |
71 | } | |
72 | return 0; | |
73 | } | |
74 | ||
75 | static void __set_cpu_idle(struct kvm_vcpu *vcpu) | |
76 | { | |
77 | BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); | |
78 | atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); | |
79 | set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
80 | } | |
81 | ||
82 | static void __unset_cpu_idle(struct kvm_vcpu *vcpu) | |
83 | { | |
84 | BUG_ON(vcpu->vcpu_id > KVM_MAX_VCPUS - 1); | |
85 | atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags); | |
86 | clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask); | |
87 | } | |
88 | ||
89 | static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) | |
90 | { | |
91 | atomic_clear_mask(CPUSTAT_ECALL_PEND | | |
92 | CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT, | |
93 | &vcpu->arch.sie_block->cpuflags); | |
94 | vcpu->arch.sie_block->lctl = 0x0000; | |
95 | } | |
96 | ||
97 | static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag) | |
98 | { | |
99 | atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags); | |
100 | } | |
101 | ||
102 | static void __set_intercept_indicator(struct kvm_vcpu *vcpu, | |
180c12fb | 103 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
104 | { |
105 | switch (inti->type) { | |
7697e71f | 106 | case KVM_S390_INT_EXTERNAL_CALL: |
ba5c1e9b CO |
107 | case KVM_S390_INT_EMERGENCY: |
108 | case KVM_S390_INT_SERVICE: | |
109 | case KVM_S390_INT_VIRTIO: | |
110 | if (psw_extint_disabled(vcpu)) | |
111 | __set_cpuflag(vcpu, CPUSTAT_EXT_INT); | |
112 | else | |
113 | vcpu->arch.sie_block->lctl |= LCTL_CR0; | |
114 | break; | |
115 | case KVM_S390_SIGP_STOP: | |
116 | __set_cpuflag(vcpu, CPUSTAT_STOP_INT); | |
117 | break; | |
118 | default: | |
119 | BUG(); | |
120 | } | |
121 | } | |
122 | ||
123 | static void __do_deliver_interrupt(struct kvm_vcpu *vcpu, | |
180c12fb | 124 | struct kvm_s390_interrupt_info *inti) |
ba5c1e9b CO |
125 | { |
126 | const unsigned short table[] = { 2, 4, 4, 6 }; | |
127 | int rc, exception = 0; | |
128 | ||
129 | switch (inti->type) { | |
130 | case KVM_S390_INT_EMERGENCY: | |
131 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg"); | |
132 | vcpu->stat.deliver_emergency_signal++; | |
133 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1201); | |
134 | if (rc == -EFAULT) | |
135 | exception = 1; | |
136 | ||
7e180bd8 | 137 | rc = put_guest_u16(vcpu, __LC_EXT_CPU_ADDR, inti->emerg.code); |
8bb3a2eb CE |
138 | if (rc == -EFAULT) |
139 | exception = 1; | |
140 | ||
ba5c1e9b CO |
141 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, |
142 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
143 | if (rc == -EFAULT) | |
144 | exception = 1; | |
145 | ||
146 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
147 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
148 | if (rc == -EFAULT) | |
149 | exception = 1; | |
150 | break; | |
151 | ||
7697e71f CE |
152 | case KVM_S390_INT_EXTERNAL_CALL: |
153 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call"); | |
154 | vcpu->stat.deliver_external_call++; | |
155 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1202); | |
156 | if (rc == -EFAULT) | |
157 | exception = 1; | |
158 | ||
7e180bd8 | 159 | rc = put_guest_u16(vcpu, __LC_EXT_CPU_ADDR, inti->extcall.code); |
7697e71f CE |
160 | if (rc == -EFAULT) |
161 | exception = 1; | |
162 | ||
163 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
164 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
165 | if (rc == -EFAULT) | |
166 | exception = 1; | |
167 | ||
168 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
169 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
170 | if (rc == -EFAULT) | |
171 | exception = 1; | |
172 | break; | |
173 | ||
ba5c1e9b CO |
174 | case KVM_S390_INT_SERVICE: |
175 | VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x", | |
176 | inti->ext.ext_params); | |
177 | vcpu->stat.deliver_service_signal++; | |
178 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2401); | |
179 | if (rc == -EFAULT) | |
180 | exception = 1; | |
181 | ||
182 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
183 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
184 | if (rc == -EFAULT) | |
185 | exception = 1; | |
186 | ||
187 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
188 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
189 | if (rc == -EFAULT) | |
190 | exception = 1; | |
191 | ||
192 | rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); | |
193 | if (rc == -EFAULT) | |
194 | exception = 1; | |
195 | break; | |
196 | ||
197 | case KVM_S390_INT_VIRTIO: | |
33e19115 | 198 | VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx", |
ba5c1e9b CO |
199 | inti->ext.ext_params, inti->ext.ext_params2); |
200 | vcpu->stat.deliver_virtio_interrupt++; | |
201 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x2603); | |
202 | if (rc == -EFAULT) | |
203 | exception = 1; | |
204 | ||
7e180bd8 | 205 | rc = put_guest_u16(vcpu, __LC_EXT_CPU_ADDR, 0x0d00); |
ba5c1e9b CO |
206 | if (rc == -EFAULT) |
207 | exception = 1; | |
208 | ||
209 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
210 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
211 | if (rc == -EFAULT) | |
212 | exception = 1; | |
213 | ||
214 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
215 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
216 | if (rc == -EFAULT) | |
217 | exception = 1; | |
218 | ||
219 | rc = put_guest_u32(vcpu, __LC_EXT_PARAMS, inti->ext.ext_params); | |
220 | if (rc == -EFAULT) | |
221 | exception = 1; | |
222 | ||
cbb870c8 HC |
223 | rc = put_guest_u64(vcpu, __LC_EXT_PARAMS2, |
224 | inti->ext.ext_params2); | |
ba5c1e9b CO |
225 | if (rc == -EFAULT) |
226 | exception = 1; | |
227 | break; | |
228 | ||
229 | case KVM_S390_SIGP_STOP: | |
230 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop"); | |
231 | vcpu->stat.deliver_stop_signal++; | |
232 | __set_intercept_indicator(vcpu, inti); | |
233 | break; | |
234 | ||
235 | case KVM_S390_SIGP_SET_PREFIX: | |
236 | VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", | |
237 | inti->prefix.address); | |
238 | vcpu->stat.deliver_prefix_signal++; | |
8d26cf7b | 239 | kvm_s390_set_prefix(vcpu, inti->prefix.address); |
ba5c1e9b CO |
240 | break; |
241 | ||
242 | case KVM_S390_RESTART: | |
243 | VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart"); | |
244 | vcpu->stat.deliver_restart_signal++; | |
245 | rc = copy_to_guest(vcpu, offsetof(struct _lowcore, | |
246 | restart_old_psw), &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
247 | if (rc == -EFAULT) | |
248 | exception = 1; | |
249 | ||
250 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
251 | offsetof(struct _lowcore, restart_psw), sizeof(psw_t)); | |
252 | if (rc == -EFAULT) | |
253 | exception = 1; | |
9e6dabef | 254 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
ba5c1e9b CO |
255 | break; |
256 | ||
257 | case KVM_S390_PROGRAM_INT: | |
258 | VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x", | |
259 | inti->pgm.code, | |
260 | table[vcpu->arch.sie_block->ipa >> 14]); | |
261 | vcpu->stat.deliver_program_int++; | |
262 | rc = put_guest_u16(vcpu, __LC_PGM_INT_CODE, inti->pgm.code); | |
263 | if (rc == -EFAULT) | |
264 | exception = 1; | |
265 | ||
266 | rc = put_guest_u16(vcpu, __LC_PGM_ILC, | |
267 | table[vcpu->arch.sie_block->ipa >> 14]); | |
268 | if (rc == -EFAULT) | |
269 | exception = 1; | |
270 | ||
271 | rc = copy_to_guest(vcpu, __LC_PGM_OLD_PSW, | |
272 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
273 | if (rc == -EFAULT) | |
274 | exception = 1; | |
275 | ||
276 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
277 | __LC_PGM_NEW_PSW, sizeof(psw_t)); | |
278 | if (rc == -EFAULT) | |
279 | exception = 1; | |
280 | break; | |
281 | ||
282 | default: | |
283 | BUG(); | |
284 | } | |
ba5c1e9b | 285 | if (exception) { |
3cd61299 CB |
286 | printk("kvm: The guest lowcore is not mapped during interrupt " |
287 | "delivery, killing userspace\n"); | |
288 | do_exit(SIGKILL); | |
ba5c1e9b CO |
289 | } |
290 | } | |
291 | ||
292 | static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu) | |
293 | { | |
294 | int rc, exception = 0; | |
295 | ||
296 | if (psw_extint_disabled(vcpu)) | |
297 | return 0; | |
298 | if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
299 | return 0; | |
300 | rc = put_guest_u16(vcpu, __LC_EXT_INT_CODE, 0x1004); | |
301 | if (rc == -EFAULT) | |
302 | exception = 1; | |
303 | rc = copy_to_guest(vcpu, __LC_EXT_OLD_PSW, | |
304 | &vcpu->arch.sie_block->gpsw, sizeof(psw_t)); | |
305 | if (rc == -EFAULT) | |
306 | exception = 1; | |
307 | rc = copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw, | |
308 | __LC_EXT_NEW_PSW, sizeof(psw_t)); | |
309 | if (rc == -EFAULT) | |
310 | exception = 1; | |
ba5c1e9b | 311 | if (exception) { |
3cd61299 CB |
312 | printk("kvm: The guest lowcore is not mapped during interrupt " |
313 | "delivery, killing userspace\n"); | |
314 | do_exit(SIGKILL); | |
ba5c1e9b | 315 | } |
ba5c1e9b CO |
316 | return 1; |
317 | } | |
318 | ||
a1b37100 | 319 | static int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) |
ba5c1e9b | 320 | { |
180c12fb CB |
321 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
322 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
323 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
324 | int rc = 0; |
325 | ||
326 | if (atomic_read(&li->active)) { | |
327 | spin_lock_bh(&li->lock); | |
328 | list_for_each_entry(inti, &li->list, list) | |
329 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
330 | rc = 1; | |
331 | break; | |
332 | } | |
333 | spin_unlock_bh(&li->lock); | |
334 | } | |
335 | ||
336 | if ((!rc) && atomic_read(&fi->active)) { | |
b037a4f3 | 337 | spin_lock(&fi->lock); |
ba5c1e9b CO |
338 | list_for_each_entry(inti, &fi->list, list) |
339 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
340 | rc = 1; | |
341 | break; | |
342 | } | |
b037a4f3 | 343 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
344 | } |
345 | ||
346 | if ((!rc) && (vcpu->arch.sie_block->ckc < | |
347 | get_clock() + vcpu->arch.sie_block->epoch)) { | |
348 | if ((!psw_extint_disabled(vcpu)) && | |
349 | (vcpu->arch.sie_block->gcr[0] & 0x800ul)) | |
350 | rc = 1; | |
351 | } | |
352 | ||
353 | return rc; | |
354 | } | |
355 | ||
3d80840d MT |
356 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
357 | { | |
358 | return 0; | |
359 | } | |
360 | ||
ba5c1e9b CO |
361 | int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
362 | { | |
363 | u64 now, sltime; | |
364 | DECLARE_WAITQUEUE(wait, current); | |
365 | ||
366 | vcpu->stat.exit_wait_state++; | |
367 | if (kvm_cpu_has_interrupt(vcpu)) | |
368 | return 0; | |
369 | ||
e52b2af5 CO |
370 | __set_cpu_idle(vcpu); |
371 | spin_lock_bh(&vcpu->arch.local_int.lock); | |
372 | vcpu->arch.local_int.timer_due = 0; | |
373 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
374 | ||
ba5c1e9b CO |
375 | if (psw_interrupts_disabled(vcpu)) { |
376 | VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); | |
377 | __unset_cpu_idle(vcpu); | |
b8e660b8 | 378 | return -EOPNOTSUPP; /* disabled wait */ |
ba5c1e9b CO |
379 | } |
380 | ||
381 | if (psw_extint_disabled(vcpu) || | |
382 | (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))) { | |
383 | VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); | |
384 | goto no_timer; | |
385 | } | |
386 | ||
387 | now = get_clock() + vcpu->arch.sie_block->epoch; | |
388 | if (vcpu->arch.sie_block->ckc < now) { | |
389 | __unset_cpu_idle(vcpu); | |
390 | return 0; | |
391 | } | |
392 | ||
ca872302 | 393 | sltime = ((vcpu->arch.sie_block->ckc - now)*125)>>9; |
ba5c1e9b | 394 | |
ca872302 CB |
395 | hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL); |
396 | VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime); | |
ba5c1e9b | 397 | no_timer: |
b037a4f3 | 398 | spin_lock(&vcpu->arch.local_int.float_int->lock); |
ba5c1e9b | 399 | spin_lock_bh(&vcpu->arch.local_int.lock); |
ba5c1e9b CO |
400 | add_wait_queue(&vcpu->arch.local_int.wq, &wait); |
401 | while (list_empty(&vcpu->arch.local_int.list) && | |
402 | list_empty(&vcpu->arch.local_int.float_int->list) && | |
403 | (!vcpu->arch.local_int.timer_due) && | |
404 | !signal_pending(current)) { | |
405 | set_current_state(TASK_INTERRUPTIBLE); | |
406 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
b037a4f3 | 407 | spin_unlock(&vcpu->arch.local_int.float_int->lock); |
ba5c1e9b CO |
408 | vcpu_put(vcpu); |
409 | schedule(); | |
410 | vcpu_load(vcpu); | |
b037a4f3 | 411 | spin_lock(&vcpu->arch.local_int.float_int->lock); |
ba5c1e9b CO |
412 | spin_lock_bh(&vcpu->arch.local_int.lock); |
413 | } | |
414 | __unset_cpu_idle(vcpu); | |
415 | __set_current_state(TASK_RUNNING); | |
d3bc2f91 | 416 | remove_wait_queue(&vcpu->arch.local_int.wq, &wait); |
ba5c1e9b | 417 | spin_unlock_bh(&vcpu->arch.local_int.lock); |
b037a4f3 | 418 | spin_unlock(&vcpu->arch.local_int.float_int->lock); |
ca872302 | 419 | hrtimer_try_to_cancel(&vcpu->arch.ckc_timer); |
ba5c1e9b CO |
420 | return 0; |
421 | } | |
422 | ||
ca872302 | 423 | void kvm_s390_tasklet(unsigned long parm) |
ba5c1e9b | 424 | { |
ca872302 | 425 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm; |
ba5c1e9b | 426 | |
ca872302 | 427 | spin_lock(&vcpu->arch.local_int.lock); |
ba5c1e9b CO |
428 | vcpu->arch.local_int.timer_due = 1; |
429 | if (waitqueue_active(&vcpu->arch.local_int.wq)) | |
430 | wake_up_interruptible(&vcpu->arch.local_int.wq); | |
ca872302 | 431 | spin_unlock(&vcpu->arch.local_int.lock); |
ba5c1e9b CO |
432 | } |
433 | ||
ca872302 CB |
434 | /* |
435 | * low level hrtimer wake routine. Because this runs in hardirq context | |
436 | * we schedule a tasklet to do the real work. | |
437 | */ | |
438 | enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) | |
439 | { | |
440 | struct kvm_vcpu *vcpu; | |
441 | ||
442 | vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); | |
443 | tasklet_schedule(&vcpu->arch.tasklet); | |
444 | ||
445 | return HRTIMER_NORESTART; | |
446 | } | |
ba5c1e9b CO |
447 | |
448 | void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) | |
449 | { | |
180c12fb CB |
450 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
451 | struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int; | |
452 | struct kvm_s390_interrupt_info *n, *inti = NULL; | |
ba5c1e9b CO |
453 | int deliver; |
454 | ||
455 | __reset_intercept_indicators(vcpu); | |
456 | if (atomic_read(&li->active)) { | |
457 | do { | |
458 | deliver = 0; | |
459 | spin_lock_bh(&li->lock); | |
460 | list_for_each_entry_safe(inti, n, &li->list, list) { | |
461 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
462 | list_del(&inti->list); | |
463 | deliver = 1; | |
464 | break; | |
465 | } | |
466 | __set_intercept_indicator(vcpu, inti); | |
467 | } | |
468 | if (list_empty(&li->list)) | |
469 | atomic_set(&li->active, 0); | |
470 | spin_unlock_bh(&li->lock); | |
471 | if (deliver) { | |
472 | __do_deliver_interrupt(vcpu, inti); | |
473 | kfree(inti); | |
474 | } | |
475 | } while (deliver); | |
476 | } | |
477 | ||
478 | if ((vcpu->arch.sie_block->ckc < | |
479 | get_clock() + vcpu->arch.sie_block->epoch)) | |
480 | __try_deliver_ckc_interrupt(vcpu); | |
481 | ||
482 | if (atomic_read(&fi->active)) { | |
483 | do { | |
484 | deliver = 0; | |
b037a4f3 | 485 | spin_lock(&fi->lock); |
ba5c1e9b CO |
486 | list_for_each_entry_safe(inti, n, &fi->list, list) { |
487 | if (__interrupt_is_deliverable(vcpu, inti)) { | |
488 | list_del(&inti->list); | |
489 | deliver = 1; | |
490 | break; | |
491 | } | |
492 | __set_intercept_indicator(vcpu, inti); | |
493 | } | |
494 | if (list_empty(&fi->list)) | |
495 | atomic_set(&fi->active, 0); | |
b037a4f3 | 496 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
497 | if (deliver) { |
498 | __do_deliver_interrupt(vcpu, inti); | |
499 | kfree(inti); | |
500 | } | |
501 | } while (deliver); | |
502 | } | |
503 | } | |
504 | ||
505 | int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code) | |
506 | { | |
180c12fb CB |
507 | struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
508 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
509 | |
510 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
511 | if (!inti) | |
512 | return -ENOMEM; | |
513 | ||
a419aef8 | 514 | inti->type = KVM_S390_PROGRAM_INT; |
ba5c1e9b CO |
515 | inti->pgm.code = code; |
516 | ||
517 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code); | |
518 | spin_lock_bh(&li->lock); | |
519 | list_add(&inti->list, &li->list); | |
520 | atomic_set(&li->active, 1); | |
521 | BUG_ON(waitqueue_active(&li->wq)); | |
522 | spin_unlock_bh(&li->lock); | |
523 | return 0; | |
524 | } | |
525 | ||
526 | int kvm_s390_inject_vm(struct kvm *kvm, | |
527 | struct kvm_s390_interrupt *s390int) | |
528 | { | |
180c12fb CB |
529 | struct kvm_s390_local_interrupt *li; |
530 | struct kvm_s390_float_interrupt *fi; | |
531 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
532 | int sigcpu; |
533 | ||
534 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
535 | if (!inti) | |
536 | return -ENOMEM; | |
537 | ||
538 | switch (s390int->type) { | |
539 | case KVM_S390_INT_VIRTIO: | |
33e19115 | 540 | VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
ba5c1e9b CO |
541 | s390int->parm, s390int->parm64); |
542 | inti->type = s390int->type; | |
543 | inti->ext.ext_params = s390int->parm; | |
544 | inti->ext.ext_params2 = s390int->parm64; | |
545 | break; | |
546 | case KVM_S390_INT_SERVICE: | |
547 | VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm); | |
548 | inti->type = s390int->type; | |
549 | inti->ext.ext_params = s390int->parm; | |
550 | break; | |
551 | case KVM_S390_PROGRAM_INT: | |
552 | case KVM_S390_SIGP_STOP: | |
7697e71f | 553 | case KVM_S390_INT_EXTERNAL_CALL: |
ba5c1e9b CO |
554 | case KVM_S390_INT_EMERGENCY: |
555 | default: | |
556 | kfree(inti); | |
557 | return -EINVAL; | |
558 | } | |
559 | ||
560 | mutex_lock(&kvm->lock); | |
561 | fi = &kvm->arch.float_int; | |
b037a4f3 | 562 | spin_lock(&fi->lock); |
ba5c1e9b CO |
563 | list_add_tail(&inti->list, &fi->list); |
564 | atomic_set(&fi->active, 1); | |
565 | sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS); | |
566 | if (sigcpu == KVM_MAX_VCPUS) { | |
567 | do { | |
568 | sigcpu = fi->next_rr_cpu++; | |
569 | if (sigcpu == KVM_MAX_VCPUS) | |
570 | sigcpu = fi->next_rr_cpu = 0; | |
571 | } while (fi->local_int[sigcpu] == NULL); | |
572 | } | |
573 | li = fi->local_int[sigcpu]; | |
574 | spin_lock_bh(&li->lock); | |
575 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
576 | if (waitqueue_active(&li->wq)) | |
577 | wake_up_interruptible(&li->wq); | |
578 | spin_unlock_bh(&li->lock); | |
b037a4f3 | 579 | spin_unlock(&fi->lock); |
ba5c1e9b CO |
580 | mutex_unlock(&kvm->lock); |
581 | return 0; | |
582 | } | |
583 | ||
584 | int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, | |
585 | struct kvm_s390_interrupt *s390int) | |
586 | { | |
180c12fb CB |
587 | struct kvm_s390_local_interrupt *li; |
588 | struct kvm_s390_interrupt_info *inti; | |
ba5c1e9b CO |
589 | |
590 | inti = kzalloc(sizeof(*inti), GFP_KERNEL); | |
591 | if (!inti) | |
592 | return -ENOMEM; | |
593 | ||
594 | switch (s390int->type) { | |
595 | case KVM_S390_PROGRAM_INT: | |
596 | if (s390int->parm & 0xffff0000) { | |
597 | kfree(inti); | |
598 | return -EINVAL; | |
599 | } | |
600 | inti->type = s390int->type; | |
601 | inti->pgm.code = s390int->parm; | |
602 | VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)", | |
603 | s390int->parm); | |
604 | break; | |
b7e6e4d3 CB |
605 | case KVM_S390_SIGP_SET_PREFIX: |
606 | inti->prefix.address = s390int->parm; | |
607 | inti->type = s390int->type; | |
608 | VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)", | |
609 | s390int->parm); | |
610 | break; | |
ba5c1e9b CO |
611 | case KVM_S390_SIGP_STOP: |
612 | case KVM_S390_RESTART: | |
7697e71f | 613 | case KVM_S390_INT_EXTERNAL_CALL: |
ba5c1e9b CO |
614 | case KVM_S390_INT_EMERGENCY: |
615 | VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type); | |
616 | inti->type = s390int->type; | |
617 | break; | |
618 | case KVM_S390_INT_VIRTIO: | |
619 | case KVM_S390_INT_SERVICE: | |
620 | default: | |
621 | kfree(inti); | |
622 | return -EINVAL; | |
623 | } | |
624 | ||
625 | mutex_lock(&vcpu->kvm->lock); | |
626 | li = &vcpu->arch.local_int; | |
627 | spin_lock_bh(&li->lock); | |
628 | if (inti->type == KVM_S390_PROGRAM_INT) | |
629 | list_add(&inti->list, &li->list); | |
630 | else | |
631 | list_add_tail(&inti->list, &li->list); | |
632 | atomic_set(&li->active, 1); | |
633 | if (inti->type == KVM_S390_SIGP_STOP) | |
634 | li->action_bits |= ACTION_STOP_ON_STOP; | |
635 | atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags); | |
636 | if (waitqueue_active(&li->wq)) | |
637 | wake_up_interruptible(&vcpu->arch.local_int.wq); | |
638 | spin_unlock_bh(&li->lock); | |
639 | mutex_unlock(&vcpu->kvm->lock); | |
640 | return 0; | |
641 | } |