blob: 77c22d685c7a150a8ecfdccbfca1ec60f08698af [file] [log] [blame]
Christian Borntraeger5288fbf2008-03-25 18:47:31 +01001/*
Heiko Carstensa53c8fa2012-07-20 11:15:04 +02002 * handling interprocessor communication
Christian Borntraeger5288fbf2008-03-25 18:47:31 +01003 *
Thomas Huthb13d3582013-11-21 16:01:48 +01004 * Copyright IBM Corp. 2008, 2013
Christian Borntraeger5288fbf2008-03-25 18:47:31 +01005 *
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>
Christian Ehrhardt9ace9032009-05-20 15:34:55 +020012 * Christian Ehrhardt <ehrhardt@de.ibm.com>
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010013 */
14
15#include <linux/kvm.h>
16#include <linux/kvm_host.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090017#include <linux/slab.h>
Heiko Carstensa9ae32c2012-06-04 12:55:15 +020018#include <asm/sigp.h>
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010019#include "gaccess.h"
20#include "kvm-s390.h"
Cornelia Huck5786fff2012-07-23 17:20:29 +020021#include "trace.h"
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010022
David Hildenbrand3d95c7d2014-03-19 16:59:39 +010023static int __sigp_sense(struct kvm_vcpu *vcpu, struct kvm_vcpu *dst_vcpu,
Christian Borntraeger5a32c1a2012-01-11 11:20:32 +010024 u64 *reg)
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010025{
Jens Freimann1ee0bc52014-02-25 15:36:45 +010026 struct kvm_s390_local_interrupt *li;
Jens Freimann1ee0bc52014-02-25 15:36:45 +010027 int cpuflags;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010028 int rc;
David Hildenbrandea5f4962014-10-14 15:29:30 +020029 int ext_call_pending;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010030
Jens Freimann1ee0bc52014-02-25 15:36:45 +010031 li = &dst_vcpu->arch.local_int;
32
33 cpuflags = atomic_read(li->cpuflags);
David Hildenbrandea5f4962014-10-14 15:29:30 +020034 ext_call_pending = kvm_s390_ext_call_pending(dst_vcpu);
35 if (!(cpuflags & CPUSTAT_STOPPED) && !ext_call_pending)
Cornelia Huck21b26c02012-06-26 16:06:41 +020036 rc = SIGP_CC_ORDER_CODE_ACCEPTED;
37 else {
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010038 *reg &= 0xffffffff00000000UL;
David Hildenbrandea5f4962014-10-14 15:29:30 +020039 if (ext_call_pending)
Cornelia Huck21b26c02012-06-26 16:06:41 +020040 *reg |= SIGP_STATUS_EXT_CALL_PENDING;
Jens Freimann1ee0bc52014-02-25 15:36:45 +010041 if (cpuflags & CPUSTAT_STOPPED)
Cornelia Huck21b26c02012-06-26 16:06:41 +020042 *reg |= SIGP_STATUS_STOPPED;
Heiko Carstensea1918d2012-06-26 16:06:40 +020043 rc = SIGP_CC_STATUS_STORED;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010044 }
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010045
David Hildenbrand3d95c7d2014-03-19 16:59:39 +010046 VCPU_EVENT(vcpu, 4, "sensed status of cpu %x rc %x", dst_vcpu->vcpu_id,
47 rc);
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010048 return rc;
49}
50
David Hildenbrand07b03032014-06-06 10:24:15 +020051static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
52 struct kvm_vcpu *dst_vcpu)
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010053{
Jens Freimann383d0b02014-07-29 15:11:49 +020054 struct kvm_s390_irq irq = {
Jens Freimann22ff4a32014-05-14 17:14:46 +020055 .type = KVM_S390_INT_EMERGENCY,
Jens Freimann383d0b02014-07-29 15:11:49 +020056 .u.emerg.code = vcpu->vcpu_id,
Jens Freimann22ff4a32014-05-14 17:14:46 +020057 };
Jens Freimann22ff4a32014-05-14 17:14:46 +020058 int rc = 0;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010059
Jens Freimann383d0b02014-07-29 15:11:49 +020060 rc = kvm_s390_inject_vcpu(dst_vcpu, &irq);
Jens Freimann22ff4a32014-05-14 17:14:46 +020061 if (!rc)
David Hildenbrand3d95c7d2014-03-19 16:59:39 +010062 VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x",
63 dst_vcpu->vcpu_id);
Christian Borntraeger5288fbf2008-03-25 18:47:31 +010064
Jens Freimann22ff4a32014-05-14 17:14:46 +020065 return rc ? rc : SIGP_CC_ORDER_CODE_ACCEPTED;
Christian Ehrhardt7697e71f2011-10-18 12:27:15 +020066}
67
David Hildenbrand07b03032014-06-06 10:24:15 +020068static int __sigp_emergency(struct kvm_vcpu *vcpu, struct kvm_vcpu *dst_vcpu)
69{
70 return __inject_sigp_emergency(vcpu, dst_vcpu);
71}
72
David Hildenbrand3d95c7d2014-03-19 16:59:39 +010073static int __sigp_conditional_emergency(struct kvm_vcpu *vcpu,
74 struct kvm_vcpu *dst_vcpu,
Thomas Huthb13d3582013-11-21 16:01:48 +010075 u16 asn, u64 *reg)
76{
Thomas Huthb13d3582013-11-21 16:01:48 +010077 const u64 psw_int_mask = PSW_MASK_IO | PSW_MASK_EXT;
78 u16 p_asn, s_asn;
79 psw_t *psw;
80 u32 flags;
81
Thomas Huthb13d3582013-11-21 16:01:48 +010082 flags = atomic_read(&dst_vcpu->arch.sie_block->cpuflags);
83 psw = &dst_vcpu->arch.sie_block->gpsw;
84 p_asn = dst_vcpu->arch.sie_block->gcr[4] & 0xffff; /* Primary ASN */
85 s_asn = dst_vcpu->arch.sie_block->gcr[3] & 0xffff; /* Secondary ASN */
86
David Hildenbrand07b03032014-06-06 10:24:15 +020087 /* Inject the emergency signal? */
Thomas Huthb13d3582013-11-21 16:01:48 +010088 if (!(flags & CPUSTAT_STOPPED)
89 || (psw->mask & psw_int_mask) != psw_int_mask
90 || ((flags & CPUSTAT_WAIT) && psw->addr != 0)
91 || (!(flags & CPUSTAT_WAIT) && (asn == p_asn || asn == s_asn))) {
David Hildenbrand07b03032014-06-06 10:24:15 +020092 return __inject_sigp_emergency(vcpu, dst_vcpu);
Thomas Huthb13d3582013-11-21 16:01:48 +010093 } else {
94 *reg &= 0xffffffff00000000UL;
95 *reg |= SIGP_STATUS_INCORRECT_STATE;
96 return SIGP_CC_STATUS_STORED;
97 }
98}
99
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100100static int __sigp_external_call(struct kvm_vcpu *vcpu,
David Hildenbrandea5f4962014-10-14 15:29:30 +0200101 struct kvm_vcpu *dst_vcpu, u64 *reg)
Christian Ehrhardt7697e71f2011-10-18 12:27:15 +0200102{
Jens Freimann383d0b02014-07-29 15:11:49 +0200103 struct kvm_s390_irq irq = {
Jens Freimann22ff4a32014-05-14 17:14:46 +0200104 .type = KVM_S390_INT_EXTERNAL_CALL,
Jens Freimann383d0b02014-07-29 15:11:49 +0200105 .u.extcall.code = vcpu->vcpu_id,
Jens Freimann22ff4a32014-05-14 17:14:46 +0200106 };
Jens Freimann22ff4a32014-05-14 17:14:46 +0200107 int rc;
Christian Ehrhardt7697e71f2011-10-18 12:27:15 +0200108
Jens Freimann383d0b02014-07-29 15:11:49 +0200109 rc = kvm_s390_inject_vcpu(dst_vcpu, &irq);
David Hildenbrandea5f4962014-10-14 15:29:30 +0200110 if (rc == -EBUSY) {
111 *reg &= 0xffffffff00000000UL;
112 *reg |= SIGP_STATUS_EXT_CALL_PENDING;
113 return SIGP_CC_STATUS_STORED;
114 } else if (rc == 0) {
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100115 VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x",
116 dst_vcpu->vcpu_id);
David Hildenbrandea5f4962014-10-14 15:29:30 +0200117 }
Christian Ehrhardt7697e71f2011-10-18 12:27:15 +0200118
Jens Freimann22ff4a32014-05-14 17:14:46 +0200119 return rc ? rc : SIGP_CC_ORDER_CODE_ACCEPTED;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100120}
121
David Hildenbranda6cc3102014-06-06 10:25:09 +0200122static int __sigp_stop(struct kvm_vcpu *vcpu, struct kvm_vcpu *dst_vcpu)
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100123{
David Hildenbrand6cddd432014-10-15 16:48:53 +0200124 struct kvm_s390_irq irq = {
125 .type = KVM_S390_SIGP_STOP,
126 };
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100127 int rc;
128
David Hildenbrand6cddd432014-10-15 16:48:53 +0200129 rc = kvm_s390_inject_vcpu(dst_vcpu, &irq);
130 if (rc == -EBUSY)
131 rc = SIGP_CC_BUSY;
132 else if (rc == 0)
133 VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x",
134 dst_vcpu->vcpu_id);
Thomas Huthe8798922013-11-06 15:46:33 +0100135
David Hildenbranda6cc3102014-06-06 10:25:09 +0200136 return rc;
137}
138
139static int __sigp_stop_and_store_status(struct kvm_vcpu *vcpu,
140 struct kvm_vcpu *dst_vcpu, u64 *reg)
141{
David Hildenbrand6cddd432014-10-15 16:48:53 +0200142 struct kvm_s390_irq irq = {
143 .type = KVM_S390_SIGP_STOP,
144 .u.stop.flags = KVM_S390_STOP_FLAG_STORE_STATUS,
145 };
David Hildenbranda6cc3102014-06-06 10:25:09 +0200146 int rc;
147
David Hildenbrand6cddd432014-10-15 16:48:53 +0200148 rc = kvm_s390_inject_vcpu(dst_vcpu, &irq);
149 if (rc == -EBUSY)
150 rc = SIGP_CC_BUSY;
151 else if (rc == 0)
152 VCPU_EVENT(vcpu, 4, "sent sigp stop and store status to cpu %x",
153 dst_vcpu->vcpu_id);
Thomas Huthe8798922013-11-06 15:46:33 +0100154
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100155 return rc;
156}
157
158static int __sigp_set_arch(struct kvm_vcpu *vcpu, u32 parameter)
159{
160 int rc;
Dominik Dingel3c038e62013-10-07 17:11:48 +0200161 unsigned int i;
162 struct kvm_vcpu *v;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100163
164 switch (parameter & 0xff) {
165 case 0:
Heiko Carstensea1918d2012-06-26 16:06:40 +0200166 rc = SIGP_CC_NOT_OPERATIONAL;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100167 break;
168 case 1:
169 case 2:
Dominik Dingel3c038e62013-10-07 17:11:48 +0200170 kvm_for_each_vcpu(i, v, vcpu->kvm) {
171 v->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
172 kvm_clear_async_pf_completion_queue(v);
173 }
174
Heiko Carstensea1918d2012-06-26 16:06:40 +0200175 rc = SIGP_CC_ORDER_CODE_ACCEPTED;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100176 break;
177 default:
Heiko Carstensb8e660b2010-02-26 22:37:41 +0100178 rc = -EOPNOTSUPP;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100179 }
180 return rc;
181}
182
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100183static int __sigp_set_prefix(struct kvm_vcpu *vcpu, struct kvm_vcpu *dst_vcpu,
184 u32 address, u64 *reg)
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100185{
David Hildenbranda3a9c592014-10-14 09:44:55 +0200186 struct kvm_s390_irq irq = {
187 .type = KVM_S390_SIGP_SET_PREFIX,
188 .u.prefix.address = address & 0x7fffe000u,
189 };
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100190 int rc;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100191
Heiko Carstens665170c2014-01-01 16:47:12 +0100192 /*
193 * Make sure the new value is valid memory. We only need to check the
194 * first page, since address is 8k aligned and memory pieces are always
195 * at least 1MB aligned and have at least a size of 1MB.
196 */
David Hildenbranda3a9c592014-10-14 09:44:55 +0200197 if (kvm_is_error_gpa(vcpu->kvm, irq.u.prefix.address)) {
Heiko Carstens07444262012-06-26 16:06:39 +0200198 *reg &= 0xffffffff00000000UL;
Heiko Carstensa9ae32c2012-06-04 12:55:15 +0200199 *reg |= SIGP_STATUS_INVALID_PARAMETER;
Heiko Carstensea1918d2012-06-26 16:06:40 +0200200 return SIGP_CC_STATUS_STORED;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100201 }
202
David Hildenbranda3a9c592014-10-14 09:44:55 +0200203 rc = kvm_s390_inject_vcpu(dst_vcpu, &irq);
204 if (rc == -EBUSY) {
Heiko Carstens07444262012-06-26 16:06:39 +0200205 *reg &= 0xffffffff00000000UL;
206 *reg |= SIGP_STATUS_INCORRECT_STATE;
David Hildenbranda3a9c592014-10-14 09:44:55 +0200207 return SIGP_CC_STATUS_STORED;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100208 }
209
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100210 return rc;
211}
212
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100213static int __sigp_store_status_at_addr(struct kvm_vcpu *vcpu,
214 struct kvm_vcpu *dst_vcpu,
215 u32 addr, u64 *reg)
Thomas Huth00e9e432013-11-13 20:48:51 +0100216{
Thomas Huth00e9e432013-11-13 20:48:51 +0100217 int flags;
218 int rc;
219
Thomas Huth00e9e432013-11-13 20:48:51 +0100220 flags = atomic_read(dst_vcpu->arch.local_int.cpuflags);
Thomas Huth00e9e432013-11-13 20:48:51 +0100221 if (!(flags & CPUSTAT_STOPPED)) {
222 *reg &= 0xffffffff00000000UL;
223 *reg |= SIGP_STATUS_INCORRECT_STATE;
224 return SIGP_CC_STATUS_STORED;
225 }
226
227 addr &= 0x7ffffe00;
228 rc = kvm_s390_store_status_unloaded(dst_vcpu, addr);
229 if (rc == -EFAULT) {
230 *reg &= 0xffffffff00000000UL;
231 *reg |= SIGP_STATUS_INVALID_PARAMETER;
232 rc = SIGP_CC_STATUS_STORED;
233 }
234 return rc;
235}
236
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100237static int __sigp_sense_running(struct kvm_vcpu *vcpu,
238 struct kvm_vcpu *dst_vcpu, u64 *reg)
Cornelia Huckbd59d3a2011-11-17 11:00:42 +0100239{
Jens Freimann1ee0bc52014-02-25 15:36:45 +0100240 struct kvm_s390_local_interrupt *li;
Cornelia Huckbd59d3a2011-11-17 11:00:42 +0100241 int rc;
Cornelia Huckbd59d3a2011-11-17 11:00:42 +0100242
Jens Freimann1ee0bc52014-02-25 15:36:45 +0100243 li = &dst_vcpu->arch.local_int;
244 if (atomic_read(li->cpuflags) & CPUSTAT_RUNNING) {
245 /* running */
246 rc = SIGP_CC_ORDER_CODE_ACCEPTED;
247 } else {
248 /* not running */
249 *reg &= 0xffffffff00000000UL;
250 *reg |= SIGP_STATUS_NOT_RUNNING;
251 rc = SIGP_CC_STATUS_STORED;
Cornelia Huckbd59d3a2011-11-17 11:00:42 +0100252 }
Cornelia Huckbd59d3a2011-11-17 11:00:42 +0100253
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100254 VCPU_EVENT(vcpu, 4, "sensed running status of cpu %x rc %x",
255 dst_vcpu->vcpu_id, rc);
Cornelia Huckbd59d3a2011-11-17 11:00:42 +0100256
257 return rc;
258}
259
David Hildenbrandb8983832014-05-23 12:22:56 +0200260static int __prepare_sigp_re_start(struct kvm_vcpu *vcpu,
261 struct kvm_vcpu *dst_vcpu, u8 order_code)
Jens Freimann151104a2012-02-08 08:28:29 +0100262{
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100263 struct kvm_s390_local_interrupt *li = &dst_vcpu->arch.local_int;
David Hildenbrandb8983832014-05-23 12:22:56 +0200264 /* handle (RE)START in user space */
265 int rc = -EOPNOTSUPP;
Jens Freimann151104a2012-02-08 08:28:29 +0100266
David Hildenbrand6cddd432014-10-15 16:48:53 +0200267 /* make sure we don't race with STOP irq injection */
David Hildenbrand4ae3c082014-05-16 10:23:53 +0200268 spin_lock(&li->lock);
David Hildenbrand6cddd432014-10-15 16:48:53 +0200269 if (kvm_s390_is_stop_irq_pending(dst_vcpu))
Heiko Carstensea1918d2012-06-26 16:06:40 +0200270 rc = SIGP_CC_BUSY;
David Hildenbrand4ae3c082014-05-16 10:23:53 +0200271 spin_unlock(&li->lock);
Jens Freimann1ee0bc52014-02-25 15:36:45 +0100272
Jens Freimann151104a2012-02-08 08:28:29 +0100273 return rc;
274}
275
David Hildenbrandb8983832014-05-23 12:22:56 +0200276static int __prepare_sigp_cpu_reset(struct kvm_vcpu *vcpu,
277 struct kvm_vcpu *dst_vcpu, u8 order_code)
278{
279 /* handle (INITIAL) CPU RESET in user space */
280 return -EOPNOTSUPP;
281}
282
283static int __prepare_sigp_unknown(struct kvm_vcpu *vcpu,
284 struct kvm_vcpu *dst_vcpu)
285{
286 /* handle unknown orders in user space */
287 return -EOPNOTSUPP;
288}
289
David Hildenbrand3526a662014-03-19 14:57:49 +0100290static int handle_sigp_dst(struct kvm_vcpu *vcpu, u8 order_code,
291 u16 cpu_addr, u32 parameter, u64 *status_reg)
292{
293 int rc;
David Hildenbrand152e9f62015-11-05 09:06:06 +0100294 struct kvm_vcpu *dst_vcpu = kvm_get_vcpu_by_id(vcpu->kvm, cpu_addr);
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100295
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100296 if (!dst_vcpu)
297 return SIGP_CC_NOT_OPERATIONAL;
David Hildenbrand3526a662014-03-19 14:57:49 +0100298
299 switch (order_code) {
300 case SIGP_SENSE:
301 vcpu->stat.instruction_sigp_sense++;
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100302 rc = __sigp_sense(vcpu, dst_vcpu, status_reg);
David Hildenbrand3526a662014-03-19 14:57:49 +0100303 break;
304 case SIGP_EXTERNAL_CALL:
305 vcpu->stat.instruction_sigp_external_call++;
David Hildenbrandea5f4962014-10-14 15:29:30 +0200306 rc = __sigp_external_call(vcpu, dst_vcpu, status_reg);
David Hildenbrand3526a662014-03-19 14:57:49 +0100307 break;
308 case SIGP_EMERGENCY_SIGNAL:
309 vcpu->stat.instruction_sigp_emergency++;
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100310 rc = __sigp_emergency(vcpu, dst_vcpu);
David Hildenbrand3526a662014-03-19 14:57:49 +0100311 break;
312 case SIGP_STOP:
313 vcpu->stat.instruction_sigp_stop++;
David Hildenbranda6cc3102014-06-06 10:25:09 +0200314 rc = __sigp_stop(vcpu, dst_vcpu);
David Hildenbrand3526a662014-03-19 14:57:49 +0100315 break;
316 case SIGP_STOP_AND_STORE_STATUS:
David Hildenbrand42cb0c92014-05-23 12:25:11 +0200317 vcpu->stat.instruction_sigp_stop_store_status++;
David Hildenbranda6cc3102014-06-06 10:25:09 +0200318 rc = __sigp_stop_and_store_status(vcpu, dst_vcpu, status_reg);
David Hildenbrand3526a662014-03-19 14:57:49 +0100319 break;
320 case SIGP_STORE_STATUS_AT_ADDRESS:
David Hildenbrand42cb0c92014-05-23 12:25:11 +0200321 vcpu->stat.instruction_sigp_store_status++;
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100322 rc = __sigp_store_status_at_addr(vcpu, dst_vcpu, parameter,
David Hildenbrand3526a662014-03-19 14:57:49 +0100323 status_reg);
324 break;
325 case SIGP_SET_PREFIX:
326 vcpu->stat.instruction_sigp_prefix++;
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100327 rc = __sigp_set_prefix(vcpu, dst_vcpu, parameter, status_reg);
David Hildenbrand3526a662014-03-19 14:57:49 +0100328 break;
329 case SIGP_COND_EMERGENCY_SIGNAL:
David Hildenbrand42cb0c92014-05-23 12:25:11 +0200330 vcpu->stat.instruction_sigp_cond_emergency++;
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100331 rc = __sigp_conditional_emergency(vcpu, dst_vcpu, parameter,
David Hildenbrand3526a662014-03-19 14:57:49 +0100332 status_reg);
333 break;
334 case SIGP_SENSE_RUNNING:
335 vcpu->stat.instruction_sigp_sense_running++;
David Hildenbrand3d95c7d2014-03-19 16:59:39 +0100336 rc = __sigp_sense_running(vcpu, dst_vcpu, status_reg);
David Hildenbrand3526a662014-03-19 14:57:49 +0100337 break;
338 case SIGP_START:
David Hildenbrand42cb0c92014-05-23 12:25:11 +0200339 vcpu->stat.instruction_sigp_start++;
David Hildenbrandb8983832014-05-23 12:22:56 +0200340 rc = __prepare_sigp_re_start(vcpu, dst_vcpu, order_code);
David Hildenbrand3526a662014-03-19 14:57:49 +0100341 break;
342 case SIGP_RESTART:
343 vcpu->stat.instruction_sigp_restart++;
David Hildenbrandb8983832014-05-23 12:22:56 +0200344 rc = __prepare_sigp_re_start(vcpu, dst_vcpu, order_code);
345 break;
346 case SIGP_INITIAL_CPU_RESET:
David Hildenbrand42cb0c92014-05-23 12:25:11 +0200347 vcpu->stat.instruction_sigp_init_cpu_reset++;
David Hildenbrandb8983832014-05-23 12:22:56 +0200348 rc = __prepare_sigp_cpu_reset(vcpu, dst_vcpu, order_code);
349 break;
350 case SIGP_CPU_RESET:
David Hildenbrand42cb0c92014-05-23 12:25:11 +0200351 vcpu->stat.instruction_sigp_cpu_reset++;
David Hildenbrandb8983832014-05-23 12:22:56 +0200352 rc = __prepare_sigp_cpu_reset(vcpu, dst_vcpu, order_code);
David Hildenbrand3526a662014-03-19 14:57:49 +0100353 break;
354 default:
David Hildenbrand42cb0c92014-05-23 12:25:11 +0200355 vcpu->stat.instruction_sigp_unknown++;
David Hildenbrandb8983832014-05-23 12:22:56 +0200356 rc = __prepare_sigp_unknown(vcpu, dst_vcpu);
David Hildenbrand3526a662014-03-19 14:57:49 +0100357 }
358
David Hildenbrandb8983832014-05-23 12:22:56 +0200359 if (rc == -EOPNOTSUPP)
360 VCPU_EVENT(vcpu, 4,
361 "sigp order %u -> cpu %x: handled in user space",
362 order_code, dst_vcpu->vcpu_id);
363
David Hildenbrand3526a662014-03-19 14:57:49 +0100364 return rc;
365}
366
Christian Borntraeger7cbde762015-07-21 12:44:57 +0200367static int handle_sigp_order_in_user_space(struct kvm_vcpu *vcpu, u8 order_code,
368 u16 cpu_addr)
David Hildenbrand2444b352014-10-09 14:10:13 +0200369{
370 if (!vcpu->kvm->arch.user_sigp)
371 return 0;
372
373 switch (order_code) {
374 case SIGP_SENSE:
375 case SIGP_EXTERNAL_CALL:
376 case SIGP_EMERGENCY_SIGNAL:
377 case SIGP_COND_EMERGENCY_SIGNAL:
378 case SIGP_SENSE_RUNNING:
379 return 0;
380 /* update counters as we're directly dropping to user space */
381 case SIGP_STOP:
382 vcpu->stat.instruction_sigp_stop++;
383 break;
384 case SIGP_STOP_AND_STORE_STATUS:
385 vcpu->stat.instruction_sigp_stop_store_status++;
386 break;
387 case SIGP_STORE_STATUS_AT_ADDRESS:
388 vcpu->stat.instruction_sigp_store_status++;
389 break;
Eric Farmancd7b4b62015-02-12 09:06:34 -0500390 case SIGP_STORE_ADDITIONAL_STATUS:
391 vcpu->stat.instruction_sigp_store_adtl_status++;
392 break;
David Hildenbrand2444b352014-10-09 14:10:13 +0200393 case SIGP_SET_PREFIX:
394 vcpu->stat.instruction_sigp_prefix++;
395 break;
396 case SIGP_START:
397 vcpu->stat.instruction_sigp_start++;
398 break;
399 case SIGP_RESTART:
400 vcpu->stat.instruction_sigp_restart++;
401 break;
402 case SIGP_INITIAL_CPU_RESET:
403 vcpu->stat.instruction_sigp_init_cpu_reset++;
404 break;
405 case SIGP_CPU_RESET:
406 vcpu->stat.instruction_sigp_cpu_reset++;
407 break;
408 default:
409 vcpu->stat.instruction_sigp_unknown++;
410 }
Christian Borntraeger7cbde762015-07-21 12:44:57 +0200411 VCPU_EVENT(vcpu, 3, "SIGP: order %u for CPU %d handled in userspace",
412 order_code, cpu_addr);
David Hildenbrand2444b352014-10-09 14:10:13 +0200413
414 return 1;
415}
416
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100417int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
418{
419 int r1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
420 int r3 = vcpu->arch.sie_block->ipa & 0x000f;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100421 u32 parameter;
Christian Borntraeger5a32c1a2012-01-11 11:20:32 +0100422 u16 cpu_addr = vcpu->run->s.regs.gprs[r3];
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100423 u8 order_code;
424 int rc;
425
Christian Borntraeger3eb77d52008-11-17 14:50:35 +0100426 /* sigp in userspace can exit */
427 if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
Thomas Huth208dd752013-06-20 17:21:59 +0200428 return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
Christian Borntraeger3eb77d52008-11-17 14:50:35 +0100429
Alexander Yarygin8ae04b82015-01-19 13:24:51 +0300430 order_code = kvm_s390_get_base_disp_rs(vcpu, NULL);
Christian Borntraeger7cbde762015-07-21 12:44:57 +0200431 if (handle_sigp_order_in_user_space(vcpu, order_code, cpu_addr))
David Hildenbrand2444b352014-10-09 14:10:13 +0200432 return -EOPNOTSUPP;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100433
434 if (r1 % 2)
Christian Borntraeger5a32c1a2012-01-11 11:20:32 +0100435 parameter = vcpu->run->s.regs.gprs[r1];
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100436 else
Christian Borntraeger5a32c1a2012-01-11 11:20:32 +0100437 parameter = vcpu->run->s.regs.gprs[r1 + 1];
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100438
Cornelia Huck5786fff2012-07-23 17:20:29 +0200439 trace_kvm_s390_handle_sigp(vcpu, order_code, cpu_addr, parameter);
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100440 switch (order_code) {
Heiko Carstensa9ae32c2012-06-04 12:55:15 +0200441 case SIGP_SET_ARCHITECTURE:
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100442 vcpu->stat.instruction_sigp_arch++;
443 rc = __sigp_set_arch(vcpu, parameter);
444 break;
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100445 default:
David Hildenbrand3526a662014-03-19 14:57:49 +0100446 rc = handle_sigp_dst(vcpu, order_code, cpu_addr,
447 parameter,
448 &vcpu->run->s.regs.gprs[r1]);
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100449 }
450
451 if (rc < 0)
452 return rc;
453
Thomas Huth949c0072013-11-26 12:27:16 +0100454 kvm_s390_set_psw_cc(vcpu, rc);
Christian Borntraeger5288fbf2008-03-25 18:47:31 +0100455 return 0;
456}
David Hildenbrand49539192014-02-21 08:59:59 +0100457
458/*
459 * Handle SIGP partial execution interception.
460 *
461 * This interception will occur at the source cpu when a source cpu sends an
462 * external call to a target cpu and the target cpu has the WAIT bit set in
463 * its cpuflags. Interception will occurr after the interrupt indicator bits at
464 * the target cpu have been set. All error cases will lead to instruction
465 * interception, therefore nothing is to be checked or prepared.
466 */
467int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu)
468{
469 int r3 = vcpu->arch.sie_block->ipa & 0x000f;
470 u16 cpu_addr = vcpu->run->s.regs.gprs[r3];
471 struct kvm_vcpu *dest_vcpu;
Alexander Yarygin8ae04b82015-01-19 13:24:51 +0300472 u8 order_code = kvm_s390_get_base_disp_rs(vcpu, NULL);
David Hildenbrand49539192014-02-21 08:59:59 +0100473
474 trace_kvm_s390_handle_sigp_pei(vcpu, order_code, cpu_addr);
475
476 if (order_code == SIGP_EXTERNAL_CALL) {
David Hildenbrand152e9f62015-11-05 09:06:06 +0100477 dest_vcpu = kvm_get_vcpu_by_id(vcpu->kvm, cpu_addr);
David Hildenbrand49539192014-02-21 08:59:59 +0100478 BUG_ON(dest_vcpu == NULL);
479
David Hildenbrand0e9c85a2014-05-16 11:59:46 +0200480 kvm_s390_vcpu_wakeup(dest_vcpu);
David Hildenbrand49539192014-02-21 08:59:59 +0100481 kvm_s390_set_psw_cc(vcpu, SIGP_CC_ORDER_CODE_ACCEPTED);
482 return 0;
483 }
484
485 return -EOPNOTSUPP;
486}