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1/*
2 * sigp.c - handlinge interprocessor communication
3 *
4 * Copyright IBM Corp. 2008,2009
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 * Christian Borntraeger <borntraeger@de.ibm.com>
12 * Christian Ehrhardt <ehrhardt@de.ibm.com>
13 */
14
15#include <linux/kvm.h>
16#include <linux/kvm_host.h>
17#include <linux/slab.h>
18#include "gaccess.h"
19#include "kvm-s390.h"
20
21/* sigp order codes */
22#define SIGP_SENSE 0x01
23#define SIGP_EXTERNAL_CALL 0x02
24#define SIGP_EMERGENCY 0x03
25#define SIGP_START 0x04
26#define SIGP_STOP 0x05
27#define SIGP_RESTART 0x06
28#define SIGP_STOP_STORE_STATUS 0x09
29#define SIGP_INITIAL_CPU_RESET 0x0b
30#define SIGP_CPU_RESET 0x0c
31#define SIGP_SET_PREFIX 0x0d
32#define SIGP_STORE_STATUS_ADDR 0x0e
33#define SIGP_SET_ARCH 0x12
34#define SIGP_SENSE_RUNNING 0x15
35
36/* cpu status bits */
37#define SIGP_STAT_EQUIPMENT_CHECK 0x80000000UL
38#define SIGP_STAT_NOT_RUNNING 0x00000400UL
39#define SIGP_STAT_INCORRECT_STATE 0x00000200UL
40#define SIGP_STAT_INVALID_PARAMETER 0x00000100UL
41#define SIGP_STAT_EXT_CALL_PENDING 0x00000080UL
42#define SIGP_STAT_STOPPED 0x00000040UL
43#define SIGP_STAT_OPERATOR_INTERV 0x00000020UL
44#define SIGP_STAT_CHECK_STOP 0x00000010UL
45#define SIGP_STAT_INOPERATIVE 0x00000004UL
46#define SIGP_STAT_INVALID_ORDER 0x00000002UL
47#define SIGP_STAT_RECEIVER_CHECK 0x00000001UL
48
49
50static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
51 u64 *reg)
52{
53 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
54 int rc;
55
56 if (cpu_addr >= KVM_MAX_VCPUS)
57 return 3; /* not operational */
58
59 spin_lock(&fi->lock);
60 if (fi->local_int[cpu_addr] == NULL)
61 rc = 3; /* not operational */
62 else if (!(atomic_read(fi->local_int[cpu_addr]->cpuflags)
63 & CPUSTAT_STOPPED)) {
64 *reg &= 0xffffffff00000000UL;
65 rc = 1; /* status stored */
66 } else {
67 *reg &= 0xffffffff00000000UL;
68 *reg |= SIGP_STAT_STOPPED;
69 rc = 1; /* status stored */
70 }
71 spin_unlock(&fi->lock);
72
73 VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc);
74 return rc;
75}
76
77static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
78{
79 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
80 struct kvm_s390_local_interrupt *li;
81 struct kvm_s390_interrupt_info *inti;
82 int rc;
83
84 if (cpu_addr >= KVM_MAX_VCPUS)
85 return 3; /* not operational */
86
87 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
88 if (!inti)
89 return -ENOMEM;
90
91 inti->type = KVM_S390_INT_EMERGENCY;
92 inti->emerg.code = vcpu->vcpu_id;
93
94 spin_lock(&fi->lock);
95 li = fi->local_int[cpu_addr];
96 if (li == NULL) {
97 rc = 3; /* not operational */
98 kfree(inti);
99 goto unlock;
100 }
101 spin_lock_bh(&li->lock);
102 list_add_tail(&inti->list, &li->list);
103 atomic_set(&li->active, 1);
104 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
105 if (waitqueue_active(&li->wq))
106 wake_up_interruptible(&li->wq);
107 spin_unlock_bh(&li->lock);
108 rc = 0; /* order accepted */
109 VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
110unlock:
111 spin_unlock(&fi->lock);
112 return rc;
113}
114
115static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
116{
117 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
118 struct kvm_s390_local_interrupt *li;
119 struct kvm_s390_interrupt_info *inti;
120 int rc;
121
122 if (cpu_addr >= KVM_MAX_VCPUS)
123 return 3; /* not operational */
124
125 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
126 if (!inti)
127 return -ENOMEM;
128
129 inti->type = KVM_S390_INT_EXTERNAL_CALL;
130 inti->extcall.code = vcpu->vcpu_id;
131
132 spin_lock(&fi->lock);
133 li = fi->local_int[cpu_addr];
134 if (li == NULL) {
135 rc = 3; /* not operational */
136 kfree(inti);
137 goto unlock;
138 }
139 spin_lock_bh(&li->lock);
140 list_add_tail(&inti->list, &li->list);
141 atomic_set(&li->active, 1);
142 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
143 if (waitqueue_active(&li->wq))
144 wake_up_interruptible(&li->wq);
145 spin_unlock_bh(&li->lock);
146 rc = 0; /* order accepted */
147 VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
148unlock:
149 spin_unlock(&fi->lock);
150 return rc;
151}
152
153static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
154{
155 struct kvm_s390_interrupt_info *inti;
156
157 inti = kzalloc(sizeof(*inti), GFP_ATOMIC);
158 if (!inti)
159 return -ENOMEM;
160 inti->type = KVM_S390_SIGP_STOP;
161
162 spin_lock_bh(&li->lock);
163 if ((atomic_read(li->cpuflags) & CPUSTAT_STOPPED))
164 goto out;
165 list_add_tail(&inti->list, &li->list);
166 atomic_set(&li->active, 1);
167 atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
168 li->action_bits |= action;
169 if (waitqueue_active(&li->wq))
170 wake_up_interruptible(&li->wq);
171out:
172 spin_unlock_bh(&li->lock);
173
174 return 0; /* order accepted */
175}
176
177static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int action)
178{
179 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
180 struct kvm_s390_local_interrupt *li;
181 int rc;
182
183 if (cpu_addr >= KVM_MAX_VCPUS)
184 return 3; /* not operational */
185
186 spin_lock(&fi->lock);
187 li = fi->local_int[cpu_addr];
188 if (li == NULL) {
189 rc = 3; /* not operational */
190 goto unlock;
191 }
192
193 rc = __inject_sigp_stop(li, action);
194
195unlock:
196 spin_unlock(&fi->lock);
197 VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", cpu_addr);
198 return rc;
199}
200
201int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action)
202{
203 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
204 return __inject_sigp_stop(li, action);
205}
206
207static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
208{
209 int rc;
210
211 switch (parameter & 0xff) {
212 case 0:
213 rc = 3; /* not operational */
214 break;
215 case 1:
216 case 2:
217 rc = 0; /* order accepted */
218 break;
219 default:
220 rc = -EOPNOTSUPP;
221 }
222 return rc;
223}
224
225static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
226 u64 *reg)
227{
228 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
229 struct kvm_s390_local_interrupt *li = NULL;
230 struct kvm_s390_interrupt_info *inti;
231 int rc;
232 u8 tmp;
233
234 /* make sure that the new value is valid memory */
235 address = address & 0x7fffe000u;
236 if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
237 copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)) {
238 *reg |= SIGP_STAT_INVALID_PARAMETER;
239 return 1; /* invalid parameter */
240 }
241
242 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
243 if (!inti)
244 return 2; /* busy */
245
246 spin_lock(&fi->lock);
247 if (cpu_addr < KVM_MAX_VCPUS)
248 li = fi->local_int[cpu_addr];
249
250 if (li == NULL) {
251 rc = 1; /* incorrect state */
252 *reg &= SIGP_STAT_INCORRECT_STATE;
253 kfree(inti);
254 goto out_fi;
255 }
256
257 spin_lock_bh(&li->lock);
258 /* cpu must be in stopped state */
259 if (!(atomic_read(li->cpuflags) & CPUSTAT_STOPPED)) {
260 rc = 1; /* incorrect state */
261 *reg &= SIGP_STAT_INCORRECT_STATE;
262 kfree(inti);
263 goto out_li;
264 }
265
266 inti->type = KVM_S390_SIGP_SET_PREFIX;
267 inti->prefix.address = address;
268
269 list_add_tail(&inti->list, &li->list);
270 atomic_set(&li->active, 1);
271 if (waitqueue_active(&li->wq))
272 wake_up_interruptible(&li->wq);
273 rc = 0; /* order accepted */
274
275 VCPU_EVENT(vcpu, 4, "set prefix of cpu %02x to %x", cpu_addr, address);
276out_li:
277 spin_unlock_bh(&li->lock);
278out_fi:
279 spin_unlock(&fi->lock);
280 return rc;
281}
282
283static int __sigp_sense_running(struct kvm_vcpu *vcpu, u16 cpu_addr,
284 u64 *reg)
285{
286 int rc;
287 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
288
289 if (cpu_addr >= KVM_MAX_VCPUS)
290 return 3; /* not operational */
291
292 spin_lock(&fi->lock);
293 if (fi->local_int[cpu_addr] == NULL)
294 rc = 3; /* not operational */
295 else {
296 if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
297 & CPUSTAT_RUNNING) {
298 /* running */
299 rc = 1;
300 } else {
301 /* not running */
302 *reg &= 0xffffffff00000000UL;
303 *reg |= SIGP_STAT_NOT_RUNNING;
304 rc = 0;
305 }
306 }
307 spin_unlock(&fi->lock);
308
309 VCPU_EVENT(vcpu, 4, "sensed running status of cpu %x rc %x", cpu_addr,
310 rc);
311
312 return rc;
313}
314
315static int __sigp_restart(struct kvm_vcpu *vcpu, u16 cpu_addr)
316{
317 int rc = 0;
318 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
319 struct kvm_s390_local_interrupt *li;
320
321 if (cpu_addr >= KVM_MAX_VCPUS)
322 return 3; /* not operational */
323
324 spin_lock(&fi->lock);
325 li = fi->local_int[cpu_addr];
326 if (li == NULL) {
327 rc = 3; /* not operational */
328 goto out;
329 }
330
331 spin_lock_bh(&li->lock);
332 if (li->action_bits & ACTION_STOP_ON_STOP)
333 rc = 2; /* busy */
334 else
335 VCPU_EVENT(vcpu, 4, "sigp restart %x to handle userspace",
336 cpu_addr);
337 spin_unlock_bh(&li->lock);
338out:
339 spin_unlock(&fi->lock);
340 return rc;
341}
342
343int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
344{
345 int r1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
346 int r3 = vcpu->arch.sie_block->ipa & 0x000f;
347 int base2 = vcpu->arch.sie_block->ipb >> 28;
348 int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
349 u32 parameter;
350 u16 cpu_addr = vcpu->run->s.regs.gprs[r3];
351 u8 order_code;
352 int rc;
353
354 /* sigp in userspace can exit */
355 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
356 return kvm_s390_inject_program_int(vcpu,
357 PGM_PRIVILEGED_OPERATION);
358
359 order_code = disp2;
360 if (base2)
361 order_code += vcpu->run->s.regs.gprs[base2];
362
363 if (r1 % 2)
364 parameter = vcpu->run->s.regs.gprs[r1];
365 else
366 parameter = vcpu->run->s.regs.gprs[r1 + 1];
367
368 switch (order_code) {
369 case SIGP_SENSE:
370 vcpu->stat.instruction_sigp_sense++;
371 rc = __sigp_sense(vcpu, cpu_addr,
372 &vcpu->run->s.regs.gprs[r1]);
373 break;
374 case SIGP_EXTERNAL_CALL:
375 vcpu->stat.instruction_sigp_external_call++;
376 rc = __sigp_external_call(vcpu, cpu_addr);
377 break;
378 case SIGP_EMERGENCY:
379 vcpu->stat.instruction_sigp_emergency++;
380 rc = __sigp_emergency(vcpu, cpu_addr);
381 break;
382 case SIGP_STOP:
383 vcpu->stat.instruction_sigp_stop++;
384 rc = __sigp_stop(vcpu, cpu_addr, ACTION_STOP_ON_STOP);
385 break;
386 case SIGP_STOP_STORE_STATUS:
387 vcpu->stat.instruction_sigp_stop++;
388 rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP |
389 ACTION_STOP_ON_STOP);
390 break;
391 case SIGP_SET_ARCH:
392 vcpu->stat.instruction_sigp_arch++;
393 rc = __sigp_set_arch(vcpu, parameter);
394 break;
395 case SIGP_SET_PREFIX:
396 vcpu->stat.instruction_sigp_prefix++;
397 rc = __sigp_set_prefix(vcpu, cpu_addr, parameter,
398 &vcpu->run->s.regs.gprs[r1]);
399 break;
400 case SIGP_SENSE_RUNNING:
401 vcpu->stat.instruction_sigp_sense_running++;
402 rc = __sigp_sense_running(vcpu, cpu_addr,
403 &vcpu->run->s.regs.gprs[r1]);
404 break;
405 case SIGP_RESTART:
406 vcpu->stat.instruction_sigp_restart++;
407 rc = __sigp_restart(vcpu, cpu_addr);
408 if (rc == 2) /* busy */
409 break;
410 /* user space must know about restart */
411 default:
412 return -EOPNOTSUPP;
413 }
414
415 if (rc < 0)
416 return rc;
417
418 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
419 vcpu->arch.sie_block->gpsw.mask |= (rc & 3ul) << 44;
420 return 0;
421}
1/*
2 * sigp.c - handlinge interprocessor communication
3 *
4 * Copyright IBM Corp. 2008,2009
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 * Christian Borntraeger <borntraeger@de.ibm.com>
12 * Christian Ehrhardt <ehrhardt@de.ibm.com>
13 */
14
15#include <linux/kvm.h>
16#include <linux/kvm_host.h>
17#include <linux/slab.h>
18#include "gaccess.h"
19#include "kvm-s390.h"
20
21/* sigp order codes */
22#define SIGP_SENSE 0x01
23#define SIGP_EXTERNAL_CALL 0x02
24#define SIGP_EMERGENCY 0x03
25#define SIGP_START 0x04
26#define SIGP_STOP 0x05
27#define SIGP_RESTART 0x06
28#define SIGP_STOP_STORE_STATUS 0x09
29#define SIGP_INITIAL_CPU_RESET 0x0b
30#define SIGP_CPU_RESET 0x0c
31#define SIGP_SET_PREFIX 0x0d
32#define SIGP_STORE_STATUS_ADDR 0x0e
33#define SIGP_SET_ARCH 0x12
34
35/* cpu status bits */
36#define SIGP_STAT_EQUIPMENT_CHECK 0x80000000UL
37#define SIGP_STAT_INCORRECT_STATE 0x00000200UL
38#define SIGP_STAT_INVALID_PARAMETER 0x00000100UL
39#define SIGP_STAT_EXT_CALL_PENDING 0x00000080UL
40#define SIGP_STAT_STOPPED 0x00000040UL
41#define SIGP_STAT_OPERATOR_INTERV 0x00000020UL
42#define SIGP_STAT_CHECK_STOP 0x00000010UL
43#define SIGP_STAT_INOPERATIVE 0x00000004UL
44#define SIGP_STAT_INVALID_ORDER 0x00000002UL
45#define SIGP_STAT_RECEIVER_CHECK 0x00000001UL
46
47
48static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
49 unsigned long *reg)
50{
51 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
52 int rc;
53
54 if (cpu_addr >= KVM_MAX_VCPUS)
55 return 3; /* not operational */
56
57 spin_lock(&fi->lock);
58 if (fi->local_int[cpu_addr] == NULL)
59 rc = 3; /* not operational */
60 else if (atomic_read(fi->local_int[cpu_addr]->cpuflags)
61 & CPUSTAT_RUNNING) {
62 *reg &= 0xffffffff00000000UL;
63 rc = 1; /* status stored */
64 } else {
65 *reg &= 0xffffffff00000000UL;
66 *reg |= SIGP_STAT_STOPPED;
67 rc = 1; /* status stored */
68 }
69 spin_unlock(&fi->lock);
70
71 VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", cpu_addr, rc);
72 return rc;
73}
74
75static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
76{
77 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
78 struct kvm_s390_local_interrupt *li;
79 struct kvm_s390_interrupt_info *inti;
80 int rc;
81
82 if (cpu_addr >= KVM_MAX_VCPUS)
83 return 3; /* not operational */
84
85 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
86 if (!inti)
87 return -ENOMEM;
88
89 inti->type = KVM_S390_INT_EMERGENCY;
90
91 spin_lock(&fi->lock);
92 li = fi->local_int[cpu_addr];
93 if (li == NULL) {
94 rc = 3; /* not operational */
95 kfree(inti);
96 goto unlock;
97 }
98 spin_lock_bh(&li->lock);
99 list_add_tail(&inti->list, &li->list);
100 atomic_set(&li->active, 1);
101 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
102 if (waitqueue_active(&li->wq))
103 wake_up_interruptible(&li->wq);
104 spin_unlock_bh(&li->lock);
105 rc = 0; /* order accepted */
106unlock:
107 spin_unlock(&fi->lock);
108 VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
109 return rc;
110}
111
112static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
113{
114 struct kvm_s390_interrupt_info *inti;
115
116 inti = kzalloc(sizeof(*inti), GFP_ATOMIC);
117 if (!inti)
118 return -ENOMEM;
119 inti->type = KVM_S390_SIGP_STOP;
120
121 spin_lock_bh(&li->lock);
122 list_add_tail(&inti->list, &li->list);
123 atomic_set(&li->active, 1);
124 atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
125 li->action_bits |= action;
126 if (waitqueue_active(&li->wq))
127 wake_up_interruptible(&li->wq);
128 spin_unlock_bh(&li->lock);
129
130 return 0; /* order accepted */
131}
132
133static int __sigp_stop(struct kvm_vcpu *vcpu, u16 cpu_addr, int action)
134{
135 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
136 struct kvm_s390_local_interrupt *li;
137 int rc;
138
139 if (cpu_addr >= KVM_MAX_VCPUS)
140 return 3; /* not operational */
141
142 spin_lock(&fi->lock);
143 li = fi->local_int[cpu_addr];
144 if (li == NULL) {
145 rc = 3; /* not operational */
146 goto unlock;
147 }
148
149 rc = __inject_sigp_stop(li, action);
150
151unlock:
152 spin_unlock(&fi->lock);
153 VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", cpu_addr);
154 return rc;
155}
156
157int kvm_s390_inject_sigp_stop(struct kvm_vcpu *vcpu, int action)
158{
159 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
160 return __inject_sigp_stop(li, action);
161}
162
163static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
164{
165 int rc;
166
167 switch (parameter & 0xff) {
168 case 0:
169 rc = 3; /* not operational */
170 break;
171 case 1:
172 case 2:
173 rc = 0; /* order accepted */
174 break;
175 default:
176 rc = -EOPNOTSUPP;
177 }
178 return rc;
179}
180
181static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
182 unsigned long *reg)
183{
184 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
185 struct kvm_s390_local_interrupt *li = NULL;
186 struct kvm_s390_interrupt_info *inti;
187 int rc;
188 u8 tmp;
189
190 /* make sure that the new value is valid memory */
191 address = address & 0x7fffe000u;
192 if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
193 copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)) {
194 *reg |= SIGP_STAT_INVALID_PARAMETER;
195 return 1; /* invalid parameter */
196 }
197
198 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
199 if (!inti)
200 return 2; /* busy */
201
202 spin_lock(&fi->lock);
203 if (cpu_addr < KVM_MAX_VCPUS)
204 li = fi->local_int[cpu_addr];
205
206 if (li == NULL) {
207 rc = 1; /* incorrect state */
208 *reg &= SIGP_STAT_INCORRECT_STATE;
209 kfree(inti);
210 goto out_fi;
211 }
212
213 spin_lock_bh(&li->lock);
214 /* cpu must be in stopped state */
215 if (atomic_read(li->cpuflags) & CPUSTAT_RUNNING) {
216 rc = 1; /* incorrect state */
217 *reg &= SIGP_STAT_INCORRECT_STATE;
218 kfree(inti);
219 goto out_li;
220 }
221
222 inti->type = KVM_S390_SIGP_SET_PREFIX;
223 inti->prefix.address = address;
224
225 list_add_tail(&inti->list, &li->list);
226 atomic_set(&li->active, 1);
227 if (waitqueue_active(&li->wq))
228 wake_up_interruptible(&li->wq);
229 rc = 0; /* order accepted */
230
231 VCPU_EVENT(vcpu, 4, "set prefix of cpu %02x to %x", cpu_addr, address);
232out_li:
233 spin_unlock_bh(&li->lock);
234out_fi:
235 spin_unlock(&fi->lock);
236 return rc;
237}
238
239int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
240{
241 int r1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
242 int r3 = vcpu->arch.sie_block->ipa & 0x000f;
243 int base2 = vcpu->arch.sie_block->ipb >> 28;
244 int disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
245 u32 parameter;
246 u16 cpu_addr = vcpu->arch.guest_gprs[r3];
247 u8 order_code;
248 int rc;
249
250 /* sigp in userspace can exit */
251 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
252 return kvm_s390_inject_program_int(vcpu,
253 PGM_PRIVILEGED_OPERATION);
254
255 order_code = disp2;
256 if (base2)
257 order_code += vcpu->arch.guest_gprs[base2];
258
259 if (r1 % 2)
260 parameter = vcpu->arch.guest_gprs[r1];
261 else
262 parameter = vcpu->arch.guest_gprs[r1 + 1];
263
264 switch (order_code) {
265 case SIGP_SENSE:
266 vcpu->stat.instruction_sigp_sense++;
267 rc = __sigp_sense(vcpu, cpu_addr,
268 &vcpu->arch.guest_gprs[r1]);
269 break;
270 case SIGP_EMERGENCY:
271 vcpu->stat.instruction_sigp_emergency++;
272 rc = __sigp_emergency(vcpu, cpu_addr);
273 break;
274 case SIGP_STOP:
275 vcpu->stat.instruction_sigp_stop++;
276 rc = __sigp_stop(vcpu, cpu_addr, ACTION_STOP_ON_STOP);
277 break;
278 case SIGP_STOP_STORE_STATUS:
279 vcpu->stat.instruction_sigp_stop++;
280 rc = __sigp_stop(vcpu, cpu_addr, ACTION_STORE_ON_STOP);
281 break;
282 case SIGP_SET_ARCH:
283 vcpu->stat.instruction_sigp_arch++;
284 rc = __sigp_set_arch(vcpu, parameter);
285 break;
286 case SIGP_SET_PREFIX:
287 vcpu->stat.instruction_sigp_prefix++;
288 rc = __sigp_set_prefix(vcpu, cpu_addr, parameter,
289 &vcpu->arch.guest_gprs[r1]);
290 break;
291 case SIGP_RESTART:
292 vcpu->stat.instruction_sigp_restart++;
293 /* user space must know about restart */
294 default:
295 return -EOPNOTSUPP;
296 }
297
298 if (rc < 0)
299 return rc;
300
301 vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
302 vcpu->arch.sie_block->gpsw.mask |= (rc & 3ul) << 44;
303 return 0;
304}