]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - arch/s390/kvm/interrupt.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
KVM: s390: Add new SIGP order to kernel counters
[mirror_ubuntu-bionic-kernel.git] / arch / s390 / kvm / interrupt.c
CommitLineData
ba5c1e9b 1/*
a53c8fab 2 * handling kvm guest interrupts
ba5c1e9b 3 *
33b412ac 4 * Copyright IBM Corp. 2008, 2015
ba5c1e9b
CO		 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>
84223598 16#include <linux/mmu_context.h>
3cd61299 17#include <linux/signal.h>
5a0e3ad6 18#include <linux/slab.h>
383d0b05 19#include <linux/bitmap.h>
cbb870c8 20#include <asm/asm-offsets.h>
33b412ac 21#include <asm/dis.h>
cbb870c8 22#include <asm/uaccess.h>
ea5f4969 23#include <asm/sclp.h>
ba5c1e9b
CO		 24#include "kvm-s390.h"
25#include "gaccess.h"
ade38c31 26#include "trace-s390.h"
ba5c1e9b 27
d8346b7d
CH		 28#define IOINT_SCHID_MASK 0x0000ffff
29#define IOINT_SSID_MASK 0x00030000
30#define IOINT_CSSID_MASK 0x03fc0000
31#define IOINT_AI_MASK 0x04000000
44c6ca3d 32#define PFAULT_INIT 0x0600
60f90a14
JF		 33#define PFAULT_DONE 0x0680
34#define VIRTIO_PARAM 0x0d00
d8346b7d
CH		 35
36static int is_ioint(u64 type)
37{
38 return ((type & 0xfffe0000u) != 0xfffe0000u);
39}
40
3c038e6b 41int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 42{
43 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
44}
45
d8346b7d
CH		 46static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
47{
48 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
49}
50
48a3e950
CH		 51static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
52{
53 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
54}
55
ba5c1e9b
CO		 56static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
57{
58 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
59 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
60 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
61 return 0;
62 return 1;
63}
64
bb78c5ec
DH		 65static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
66{
67 if (psw_extint_disabled(vcpu) ||
68 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
69 return 0;
f71d0dc5
DH		 70 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
71 /* No timer interrupts when single stepping */
72 return 0;
bb78c5ec
DH		 73 return 1;
74}
75
79fd50c6
CH		 76static u64 int_word_to_isc_bits(u32 int_word)
77{
78 u8 isc = (int_word & 0x38000000) >> 27;
79
80 return (0x80 >> isc) << 24;
81}
82
614aeab4 83static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
180c12fb 84 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 85{
86 switch (inti->type) {
7697e71f
CE		 87 case KVM_S390_INT_EXTERNAL_CALL:
88 if (psw_extint_disabled(vcpu))
89 return 0;
90 if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
91 return 1;
f346026e 92 return 0;
ba5c1e9b
CO		 93 case KVM_S390_INT_EMERGENCY:
94 if (psw_extint_disabled(vcpu))
95 return 0;
96 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
97 return 1;
98 return 0;
e029ae5b
TH		 99 case KVM_S390_INT_CLOCK_COMP:
100 return ckc_interrupts_enabled(vcpu);
101 case KVM_S390_INT_CPU_TIMER:
102 if (psw_extint_disabled(vcpu))
103 return 0;
104 if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
105 return 1;
106 return 0;
ba5c1e9b 107 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 108 case KVM_S390_INT_PFAULT_INIT:
109 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 110 case KVM_S390_INT_VIRTIO:
111 if (psw_extint_disabled(vcpu))
112 return 0;
113 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
114 return 1;
115 return 0;
116 case KVM_S390_PROGRAM_INT:
117 case KVM_S390_SIGP_STOP:
118 case KVM_S390_SIGP_SET_PREFIX:
119 case KVM_S390_RESTART:
120 return 1;
48a3e950
CH		 121 case KVM_S390_MCHK:
122 if (psw_mchk_disabled(vcpu))
123 return 0;
124 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
125 return 1;
126 return 0;
d8346b7d
CH		 127 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
128 if (psw_ioint_disabled(vcpu))
129 return 0;
79fd50c6
CH		 130 if (vcpu->arch.sie_block->gcr[6] &
131 int_word_to_isc_bits(inti->io.io_int_word))
d8346b7d
CH		 132 return 1;
133 return 0;
ba5c1e9b 134 default:
d8346b7d
CH		 135 printk(KERN_WARNING "illegal interrupt type %llx\n",
136 inti->type);
ba5c1e9b
CO		 137 BUG();
138 }
139 return 0;
140}
141
383d0b05
JF		 142static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu)
143{
144 return vcpu->arch.local_int.pending_irqs;
145}
146
147static unsigned long deliverable_local_irqs(struct kvm_vcpu *vcpu)
148{
149 unsigned long active_mask = pending_local_irqs(vcpu);
150
151 if (psw_extint_disabled(vcpu))
152 active_mask &= ~IRQ_PEND_EXT_MASK;
153 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
154 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
155 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
156 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
157 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
158 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
159 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
160 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
161 if (psw_mchk_disabled(vcpu))
162 active_mask &= ~IRQ_PEND_MCHK_MASK;
163
6cddd432
DH		 164 /*
165 * STOP irqs will never be actively delivered. They are triggered via
166 * intercept requests and cleared when the stop intercept is performed.
167 */
168 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
169
383d0b05
JF		 170 return active_mask;
171}
172
ba5c1e9b
CO		 173static void __set_cpu_idle(struct kvm_vcpu *vcpu)
174{
ba5c1e9b
CO		 175 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
176 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
177}
178
179static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
180{
ba5c1e9b
CO		 181 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
182 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
183}
184
185static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
186{
4953919f
DH		 187 atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
188 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 189 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 190 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
191
192 if (guestdbg_enabled(vcpu)) {
193 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
194 LCTL_CR10 | LCTL_CR11);
195 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
196 }
ba5c1e9b
CO		 197}
198
199static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
200{
201 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
202}
203
383d0b05
JF		 204static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
205{
206 if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK))
207 return;
208 if (psw_extint_disabled(vcpu))
209 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
210 else
211 vcpu->arch.sie_block->lctl |= LCTL_CR0;
212}
213
214static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
215{
216 if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
217 return;
218 if (psw_mchk_disabled(vcpu))
219 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
220 else
221 vcpu->arch.sie_block->lctl |= LCTL_CR14;
222}
223
6cddd432
DH		 224static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
225{
226 if (kvm_s390_is_stop_irq_pending(vcpu))
227 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
228}
229
383d0b05
JF		 230/* Set interception request for non-deliverable local interrupts */
231static void set_intercept_indicators_local(struct kvm_vcpu *vcpu)
232{
233 set_intercept_indicators_ext(vcpu);
234 set_intercept_indicators_mchk(vcpu);
6cddd432 235 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 236}
237
ba5c1e9b 238static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
180c12fb 239 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 240{
241 switch (inti->type) {
ba5c1e9b 242 case KVM_S390_INT_SERVICE:
3c038e6b 243 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 244 case KVM_S390_INT_VIRTIO:
245 if (psw_extint_disabled(vcpu))
246 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
247 else
248 vcpu->arch.sie_block->lctl |= LCTL_CR0;
249 break;
48a3e950
CH		 250 case KVM_S390_MCHK:
251 if (psw_mchk_disabled(vcpu))
252 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
253 else
254 vcpu->arch.sie_block->lctl |= LCTL_CR14;
255 break;
d8346b7d
CH		 256 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
257 if (psw_ioint_disabled(vcpu))
258 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
259 else
260 vcpu->arch.sie_block->lctl |= LCTL_CR6;
261 break;
ba5c1e9b
CO		 262 default:
263 BUG();
264 }
265}
266
8a2ef71b
JF		 267static u16 get_ilc(struct kvm_vcpu *vcpu)
268{
8a2ef71b
JF		 269 switch (vcpu->arch.sie_block->icptcode) {
270 case ICPT_INST:
271 case ICPT_INSTPROGI:
272 case ICPT_OPEREXC:
273 case ICPT_PARTEXEC:
274 case ICPT_IOINST:
275 /* last instruction only stored for these icptcodes */
33b412ac 276 return insn_length(vcpu->arch.sie_block->ipa >> 8);
8a2ef71b
JF		 277 case ICPT_PROGI:
278 return vcpu->arch.sie_block->pgmilc;
279 default:
280 return 0;
281 }
282}
283
0fb97abe
JF		 284static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
285{
383d0b05 286 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 287 int rc;
288
289 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
290 0, 0);
291
292 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
293 (u16 *)__LC_EXT_INT_CODE);
467fc298 294 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 295 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
296 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
297 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
298 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 299 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 300 return rc ? -EFAULT : 0;
0fb97abe
JF		 301}
302
303static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
304{
383d0b05 305 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 306 int rc;
307
308 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
309 0, 0);
310
311 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
312 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 313 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 314 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
315 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
316 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
317 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 318 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 319 return rc ? -EFAULT : 0;
0fb97abe
JF		 320}
321
383d0b05 322static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 323{
383d0b05
JF		 324 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
325 struct kvm_s390_ext_info ext;
0fb97abe
JF		 326 int rc;
327
383d0b05
JF		 328 spin_lock(&li->lock);
329 ext = li->irq.ext;
330 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
331 li->irq.ext.ext_params2 = 0;
332 spin_unlock(&li->lock);
333
0fb97abe 334 VCPU_EVENT(vcpu, 4, "interrupt: pfault init parm:%x,parm64:%llx",
383d0b05 335 0, ext.ext_params2);
0fb97abe
JF		 336 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
337 KVM_S390_INT_PFAULT_INIT,
383d0b05 338 0, ext.ext_params2);
0fb97abe
JF		 339
340 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
341 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
342 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
343 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
344 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
345 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 346 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 347 return rc ? -EFAULT : 0;
0fb97abe
JF		 348}
349
383d0b05 350static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 351{
383d0b05
JF		 352 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
353 struct kvm_s390_mchk_info mchk;
0fb97abe
JF		 354 int rc;
355
383d0b05
JF		 356 spin_lock(&li->lock);
357 mchk = li->irq.mchk;
358 /*
359 * If there was an exigent machine check pending, then any repressible
360 * machine checks that might have been pending are indicated along
361 * with it, so always clear both bits
362 */
363 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
364 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
365 memset(&li->irq.mchk, 0, sizeof(mchk));
366 spin_unlock(&li->lock);
367
0fb97abe 368 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
383d0b05 369 mchk.mcic);
0fb97abe 370 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
383d0b05 371 mchk.cr14, mchk.mcic);
0fb97abe
JF		 372
373 rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
383d0b05 374 rc |= put_guest_lc(vcpu, mchk.mcic,
0fb97abe 375 (u64 __user *) __LC_MCCK_CODE);
383d0b05 376 rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
0fb97abe
JF		 377 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
378 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
383d0b05 379 &mchk.fixed_logout, sizeof(mchk.fixed_logout));
0fb97abe
JF		 380 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
381 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
382 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
383 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 384 return rc ? -EFAULT : 0;
0fb97abe
JF		 385}
386
387static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
388{
383d0b05 389 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 390 int rc;
391
392 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
393 vcpu->stat.deliver_restart_signal++;
394 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
395
396 rc = write_guest_lc(vcpu,
397 offsetof(struct _lowcore, restart_old_psw),
398 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
399 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
400 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 401 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 402 return rc ? -EFAULT : 0;
0fb97abe
JF		 403}
404
383d0b05 405static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 406{
383d0b05
JF		 407 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
408 struct kvm_s390_prefix_info prefix;
409
410 spin_lock(&li->lock);
411 prefix = li->irq.prefix;
412 li->irq.prefix.address = 0;
413 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
414 spin_unlock(&li->lock);
0fb97abe 415
383d0b05 416 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", prefix.address);
0fb97abe
JF		 417 vcpu->stat.deliver_prefix_signal++;
418 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
419 KVM_S390_SIGP_SET_PREFIX,
383d0b05 420 prefix.address, 0);
0fb97abe 421
383d0b05 422 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 423 return 0;
424}
425
383d0b05 426static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 427{
383d0b05 428 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 429 int rc;
383d0b05
JF		 430 int cpu_addr;
431
432 spin_lock(&li->lock);
433 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
434 clear_bit(cpu_addr, li->sigp_emerg_pending);
435 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
436 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
437 spin_unlock(&li->lock);
0fb97abe
JF		 438
439 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
440 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 441 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
442 cpu_addr, 0);
0fb97abe
JF		 443
444 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
445 (u16 *)__LC_EXT_INT_CODE);
383d0b05 446 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 447 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
448 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
449 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
450 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 451 return rc ? -EFAULT : 0;
0fb97abe
JF		 452}
453
383d0b05 454static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 455{
383d0b05
JF		 456 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
457 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 458 int rc;
459
383d0b05
JF		 460 spin_lock(&li->lock);
461 extcall = li->irq.extcall;
462 li->irq.extcall.code = 0;
463 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
464 spin_unlock(&li->lock);
465
0fb97abe
JF		 466 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
467 vcpu->stat.deliver_external_call++;
468 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
469 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 470 extcall.code, 0);
0fb97abe
JF		 471
472 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
473 (u16 *)__LC_EXT_INT_CODE);
383d0b05 474 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 475 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
476 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
477 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
478 sizeof(psw_t));
99e20009 479 return rc ? -EFAULT : 0;
0fb97abe
JF		 480}
481
383d0b05 482static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 483{
383d0b05
JF		 484 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
485 struct kvm_s390_pgm_info pgm_info;
a9a846fd 486 int rc = 0, nullifying = false;
8a2ef71b 487 u16 ilc = get_ilc(vcpu);
8712836b 488
383d0b05
JF		 489 spin_lock(&li->lock);
490 pgm_info = li->irq.pgm;
491 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
492 memset(&li->irq.pgm, 0, sizeof(pgm_info));
493 spin_unlock(&li->lock);
494
0fb97abe 495 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
383d0b05 496 pgm_info.code, ilc);
0fb97abe
JF		 497 vcpu->stat.deliver_program_int++;
498 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 499 pgm_info.code, 0);
0fb97abe 500
383d0b05 501 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 502 case PGM_AFX_TRANSLATION:
503 case PGM_ASX_TRANSLATION:
504 case PGM_EX_TRANSLATION:
505 case PGM_LFX_TRANSLATION:
506 case PGM_LSTE_SEQUENCE:
507 case PGM_LSX_TRANSLATION:
508 case PGM_LX_TRANSLATION:
509 case PGM_PRIMARY_AUTHORITY:
510 case PGM_SECONDARY_AUTHORITY:
a9a846fd
TH		 511 nullifying = true;
512 /* fall through */
8712836b 513 case PGM_SPACE_SWITCH:
383d0b05 514 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 515 (u64 *)__LC_TRANS_EXC_CODE);
516 break;
517 case PGM_ALEN_TRANSLATION:
518 case PGM_ALE_SEQUENCE:
519 case PGM_ASTE_INSTANCE:
520 case PGM_ASTE_SEQUENCE:
521 case PGM_ASTE_VALIDITY:
522 case PGM_EXTENDED_AUTHORITY:
383d0b05 523 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 524 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 525 nullifying = true;
8712836b
DH		 526 break;
527 case PGM_ASCE_TYPE:
528 case PGM_PAGE_TRANSLATION:
529 case PGM_REGION_FIRST_TRANS:
530 case PGM_REGION_SECOND_TRANS:
531 case PGM_REGION_THIRD_TRANS:
532 case PGM_SEGMENT_TRANSLATION:
383d0b05 533 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 534 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 535 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 536 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 537 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 538 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 539 nullifying = true;
8712836b
DH		 540 break;
541 case PGM_MONITOR:
383d0b05 542 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 543 (u16 *)__LC_MON_CLASS_NR);
383d0b05 544 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 545 (u64 *)__LC_MON_CODE);
546 break;
403c8648 547 case PGM_VECTOR_PROCESSING:
8712836b 548 case PGM_DATA:
383d0b05 549 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 550 (u32 *)__LC_DATA_EXC_CODE);
551 break;
552 case PGM_PROTECTION:
383d0b05 553 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 554 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 555 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 556 (u8 *)__LC_EXC_ACCESS_ID);
557 break;
a9a846fd
TH		 558 case PGM_STACK_FULL:
559 case PGM_STACK_EMPTY:
560 case PGM_STACK_SPECIFICATION:
561 case PGM_STACK_TYPE:
562 case PGM_STACK_OPERATION:
563 case PGM_TRACE_TABEL:
564 case PGM_CRYPTO_OPERATION:
565 nullifying = true;
566 break;
8712836b
DH		 567 }
568
383d0b05
JF		 569 if (pgm_info.code & PGM_PER) {
570 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 571 (u8 *) __LC_PER_CODE);
383d0b05 572 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 573 (u8 *)__LC_PER_ATMID);
383d0b05 574 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 575 (u64 *) __LC_PER_ADDRESS);
383d0b05 576 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 577 (u8 *) __LC_PER_ACCESS_ID);
578 }
579
a9a846fd
TH		 580 if (nullifying && vcpu->arch.sie_block->icptcode == ICPT_INST)
581 kvm_s390_rewind_psw(vcpu, ilc);
582
8a2ef71b 583 rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
383d0b05 584 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 585 (u16 *)__LC_PGM_INT_CODE);
586 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
587 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
588 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
589 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 590 return rc ? -EFAULT : 0;
0fb97abe
JF		 591}
592
593static int __must_check __deliver_service(struct kvm_vcpu *vcpu,
594 struct kvm_s390_interrupt_info *inti)
595{
596 int rc;
597
598 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
599 inti->ext.ext_params);
600 vcpu->stat.deliver_service_signal++;
601 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
602 inti->ext.ext_params, 0);
603
604 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 605 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 606 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
607 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
608 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
609 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
610 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
611 (u32 *)__LC_EXT_PARAMS);
99e20009 612 return rc ? -EFAULT : 0;
0fb97abe
JF		 613}
614
615static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu,
616 struct kvm_s390_interrupt_info *inti)
617{
618 int rc;
619
620 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
621 KVM_S390_INT_PFAULT_DONE, 0,
622 inti->ext.ext_params2);
8712836b 623
0fb97abe
JF		 624 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
625 rc |= put_guest_lc(vcpu, PFAULT_DONE, (u16 *)__LC_EXT_CPU_ADDR);
626 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
627 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
628 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
629 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
630 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
631 (u64 *)__LC_EXT_PARAMS2);
99e20009 632 return rc ? -EFAULT : 0;
0fb97abe
JF		 633}
634
635static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu,
636 struct kvm_s390_interrupt_info *inti)
637{
638 int rc;
639
640 VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
641 inti->ext.ext_params, inti->ext.ext_params2);
642 vcpu->stat.deliver_virtio_interrupt++;
643 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
644 inti->ext.ext_params,
645 inti->ext.ext_params2);
646
647 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
648 rc |= put_guest_lc(vcpu, VIRTIO_PARAM, (u16 *)__LC_EXT_CPU_ADDR);
649 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
650 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
651 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
652 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
653 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
654 (u32 *)__LC_EXT_PARAMS);
655 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
656 (u64 *)__LC_EXT_PARAMS2);
99e20009 657 return rc ? -EFAULT : 0;
0fb97abe
JF		 658}
659
660static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
661 struct kvm_s390_interrupt_info *inti)
662{
663 int rc;
664
665 VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
666 vcpu->stat.deliver_io_int++;
667 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
668 ((__u32)inti->io.subchannel_id << 16) |
669 inti->io.subchannel_nr,
670 ((__u64)inti->io.io_int_parm << 32) |
671 inti->io.io_int_word);
672
673 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
674 (u16 *)__LC_SUBCHANNEL_ID);
675 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
676 (u16 *)__LC_SUBCHANNEL_NR);
677 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
678 (u32 *)__LC_IO_INT_PARM);
679 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
680 (u32 *)__LC_IO_INT_WORD);
681 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
682 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
683 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
684 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 685 return rc ? -EFAULT : 0;
8712836b
DH		 686}
687
383d0b05
JF		 688static int __must_check __deliver_mchk_floating(struct kvm_vcpu *vcpu,
689 struct kvm_s390_interrupt_info *inti)
690{
691 struct kvm_s390_mchk_info *mchk = &inti->mchk;
692 int rc;
693
694 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
695 mchk->mcic);
696 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
697 mchk->cr14, mchk->mcic);
698
699 rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
700 rc |= put_guest_lc(vcpu, mchk->mcic,
701 (u64 __user *) __LC_MCCK_CODE);
702 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
703 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
704 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
705 &mchk->fixed_logout, sizeof(mchk->fixed_logout));
706 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
707 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
708 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
709 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 710 return rc ? -EFAULT : 0;
383d0b05
JF		 711}
712
713typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
714
715static const deliver_irq_t deliver_irq_funcs[] = {
716 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
717 [IRQ_PEND_PROG] = __deliver_prog,
718 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
719 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
720 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
721 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
722 [IRQ_PEND_RESTART] = __deliver_restart,
383d0b05
JF		 723 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
724 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
725};
726
727static int __must_check __deliver_floating_interrupt(struct kvm_vcpu *vcpu,
728 struct kvm_s390_interrupt_info *inti)
ba5c1e9b 729{
0fb97abe 730 int rc;
ba5c1e9b
CO		 731
732 switch (inti->type) {
ba5c1e9b 733 case KVM_S390_INT_SERVICE:
0fb97abe 734 rc = __deliver_service(vcpu, inti);
ba5c1e9b 735 break;
3c038e6b 736 case KVM_S390_INT_PFAULT_DONE:
0fb97abe 737 rc = __deliver_pfault_done(vcpu, inti);
3c038e6b 738 break;
ba5c1e9b 739 case KVM_S390_INT_VIRTIO:
0fb97abe 740 rc = __deliver_virtio(vcpu, inti);
ba5c1e9b 741 break;
48a3e950 742 case KVM_S390_MCHK:
383d0b05 743 rc = __deliver_mchk_floating(vcpu, inti);
48a3e950 744 break;
d8346b7d 745 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
0fb97abe 746 rc = __deliver_io(vcpu, inti);
d8346b7d 747 break;
ba5c1e9b
CO		 748 default:
749 BUG();
750 }
79395031
JF		 751
752 return rc;
ba5c1e9b
CO		 753}
754
ea5f4969
DH		 755/* Check whether an external call is pending (deliverable or not) */
756int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 757{
ea5f4969
DH		 758 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
759 uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
4953919f 760
ea5f4969
DH		 761 if (!sclp_has_sigpif())
762 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 763
ea5f4969
DH		 764 return (sigp_ctrl & SIGP_CTRL_C) &&
765 (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND);
4953919f
DH		 766}
767
9a022067 768int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 769{
180c12fb
CB		 770 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
771 struct kvm_s390_interrupt_info *inti;
383d0b05 772 int rc;
ba5c1e9b 773
383d0b05 774 rc = !!deliverable_local_irqs(vcpu);
ba5c1e9b
CO		 775
776 if ((!rc) && atomic_read(&fi->active)) {
b037a4f3 777 spin_lock(&fi->lock);
ba5c1e9b
CO		 778 list_for_each_entry(inti, &fi->list, list)
779 if (__interrupt_is_deliverable(vcpu, inti)) {
780 rc = 1;
781 break;
782 }
b037a4f3 783 spin_unlock(&fi->lock);
ba5c1e9b
CO		 784 }
785
bb78c5ec
DH		 786 if (!rc && kvm_cpu_has_pending_timer(vcpu))
787 rc = 1;
ba5c1e9b 788
ea5f4969
DH		 789 /* external call pending and deliverable */
790 if (!rc && kvm_s390_ext_call_pending(vcpu) &&
791 !psw_extint_disabled(vcpu) &&
792 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
4953919f
DH		 793 rc = 1;
794
9a022067 795 if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
6cddd432
DH		 796 rc = 1;
797
ba5c1e9b
CO		 798 return rc;
799}
800
3d80840d
MT		 801int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
802{
bb78c5ec
DH		 803 if (!(vcpu->arch.sie_block->ckc <
804 get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
805 return 0;
806 if (!ckc_interrupts_enabled(vcpu))
807 return 0;
808 return 1;
3d80840d
MT		 809}
810
ba5c1e9b
CO		 811int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
812{
813 u64 now, sltime;
ba5c1e9b
CO		 814
815 vcpu->stat.exit_wait_state++;
ba5c1e9b 816
0759d068
DH		 817 /* fast path */
818 if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu))
819 return 0;
e52b2af5 820
ba5c1e9b
CO		 821 if (psw_interrupts_disabled(vcpu)) {
822 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 823 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 824 }
825
bb78c5ec 826 if (!ckc_interrupts_enabled(vcpu)) {
ba5c1e9b 827 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 828 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 829 goto no_timer;
830 }
831
8c071b0f 832 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
ed4f2094 833 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
bda343ef
DH		 834
835 /* underflow */
836 if (vcpu->arch.sie_block->ckc < now)
837 return 0;
838
839 __set_cpu_idle(vcpu);
ca872302
CB		 840 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
841 VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
ba5c1e9b 842no_timer:
800c1065 843 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 844 kvm_vcpu_block(vcpu);
ba5c1e9b 845 __unset_cpu_idle(vcpu);
800c1065
TH		 846 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
847
2d00f759 848 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 849 return 0;
850}
851
0e9c85a5
DH		 852void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
853{
854 if (waitqueue_active(&vcpu->wq)) {
855 /*
856 * The vcpu gave up the cpu voluntarily, mark it as a good
857 * yield-candidate.
858 */
859 vcpu->preempted = true;
860 wake_up_interruptible(&vcpu->wq);
ce2e4f0b 861 vcpu->stat.halt_wakeup++;
0e9c85a5
DH		 862 }
863}
864
ca872302
CB		 865enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
866{
867 struct kvm_vcpu *vcpu;
2d00f759 868 u64 now, sltime;
ca872302
CB		 869
870 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
2d00f759
DH		 871 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
872 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
ca872302 873
2d00f759
DH		 874 /*
875 * If the monotonic clock runs faster than the tod clock we might be
876 * woken up too early and have to go back to sleep to avoid deadlocks.
877 */
878 if (vcpu->arch.sie_block->ckc > now &&
879 hrtimer_forward_now(timer, ns_to_ktime(sltime)))
880 return HRTIMER_RESTART;
881 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 882 return HRTIMER_NORESTART;
883}
ba5c1e9b 884
2ed10cc1
JF		 885void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
886{
887 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 888
4ae3c081 889 spin_lock(&li->lock);
383d0b05
JF		 890 li->pending_irqs = 0;
891 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
892 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 893 spin_unlock(&li->lock);
4953919f
DH		 894
895 /* clear pending external calls set by sigp interpretation facility */
383d0b05 896 atomic_clear_mask(CPUSTAT_ECALL_PEND, li->cpuflags);
ea5f4969 897 vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0;
2ed10cc1
JF		 898}
899
614aeab4 900int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 901{
180c12fb
CB		 902 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
903 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
904 struct kvm_s390_interrupt_info *n, *inti = NULL;
383d0b05 905 deliver_irq_t func;
ba5c1e9b 906 int deliver;
79395031 907 int rc = 0;
383d0b05
JF		 908 unsigned long irq_type;
909 unsigned long deliverable_irqs;
ba5c1e9b
CO		 910
911 __reset_intercept_indicators(vcpu);
ba5c1e9b 912
383d0b05
JF		 913 /* pending ckc conditions might have been invalidated */
914 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
915 if (kvm_cpu_has_pending_timer(vcpu))
916 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
917
918 do {
919 deliverable_irqs = deliverable_local_irqs(vcpu);
920 /* bits are in the order of interrupt priority */
921 irq_type = find_first_bit(&deliverable_irqs, IRQ_PEND_COUNT);
922 if (irq_type == IRQ_PEND_COUNT)
923 break;
924 func = deliver_irq_funcs[irq_type];
925 if (!func) {
926 WARN_ON_ONCE(func == NULL);
927 clear_bit(irq_type, &li->pending_irqs);
928 continue;
929 }
930 rc = func(vcpu);
931 } while (!rc && irq_type != IRQ_PEND_COUNT);
932
933 set_intercept_indicators_local(vcpu);
ba5c1e9b 934
79395031 935 if (!rc && atomic_read(&fi->active)) {
ba5c1e9b
CO		 936 do {
937 deliver = 0;
b037a4f3 938 spin_lock(&fi->lock);
ba5c1e9b
CO		 939 list_for_each_entry_safe(inti, n, &fi->list, list) {
940 if (__interrupt_is_deliverable(vcpu, inti)) {
941 list_del(&inti->list);
a91b8ebe 942 fi->irq_count--;
ba5c1e9b
CO		 943 deliver = 1;
944 break;
945 }
946 __set_intercept_indicator(vcpu, inti);
947 }
948 if (list_empty(&fi->list))
949 atomic_set(&fi->active, 0);
b037a4f3 950 spin_unlock(&fi->lock);
ba5c1e9b 951 if (deliver) {
383d0b05 952 rc = __deliver_floating_interrupt(vcpu, inti);
ba5c1e9b
CO		 953 kfree(inti);
954 }
79395031 955 } while (!rc && deliver);
ba5c1e9b 956 }
79395031
JF		 957
958 return rc;
ba5c1e9b
CO		 959}
960
383d0b05 961static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 962{
963 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
964
383d0b05 965 li->irq.pgm = irq->u.pgm;
9185124e 966 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 967 return 0;
968}
969
ba5c1e9b
CO		 970int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
971{
180c12fb 972 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 973 struct kvm_s390_irq irq;
ba5c1e9b
CO		 974
975 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
383d0b05
JF		 976 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, code,
977 0, 1);
4ae3c081 978 spin_lock(&li->lock);
383d0b05
JF		 979 irq.u.pgm.code = code;
980 __inject_prog(vcpu, &irq);
d0321a24 981 BUG_ON(waitqueue_active(li->wq));
4ae3c081 982 spin_unlock(&li->lock);
bcd84683
JF		 983 return 0;
984}
985
986int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
987 struct kvm_s390_pgm_info *pgm_info)
988{
989 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 990 struct kvm_s390_irq irq;
0146a7b0 991 int rc;
bcd84683 992
bcd84683
JF		 993 VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
994 pgm_info->code);
995 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
996 pgm_info->code, 0, 1);
4ae3c081 997 spin_lock(&li->lock);
383d0b05
JF		 998 irq.u.pgm = *pgm_info;
999 rc = __inject_prog(vcpu, &irq);
bcd84683 1000 BUG_ON(waitqueue_active(li->wq));
4ae3c081 1001 spin_unlock(&li->lock);
0146a7b0
JF		 1002 return rc;
1003}
1004
383d0b05 1005static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1006{
1007 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1008
383d0b05
JF		 1009 VCPU_EVENT(vcpu, 3, "inject: external irq params:%x, params2:%llx",
1010 irq->u.ext.ext_params, irq->u.ext.ext_params2);
1011 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1012 irq->u.ext.ext_params,
1013 irq->u.ext.ext_params2, 2);
1014
1015 li->irq.ext = irq->u.ext;
1016 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
0146a7b0
JF		 1017 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1018 return 0;
1019}
1020
ea5f4969
DH		 1021static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id)
1022{
1023 unsigned char new_val, old_val;
1024 uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
1025
1026 new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK);
1027 old_val = *sigp_ctrl & ~SIGP_CTRL_C;
1028 if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) {
1029 /* another external call is pending */
1030 return -EBUSY;
1031 }
1032 atomic_set_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
1033 return 0;
1034}
1035
0675d92d 1036static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1037{
1038 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1039 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1040 uint16_t src_id = irq->u.extcall.code;
0146a7b0
JF		 1041
1042 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
ea5f4969 1043 src_id);
383d0b05 1044 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ea5f4969
DH		 1045 src_id, 0, 2);
1046
1047 /* sending vcpu invalid */
1048 if (src_id >= KVM_MAX_VCPUS ||
1049 kvm_get_vcpu(vcpu->kvm, src_id) == NULL)
1050 return -EINVAL;
1051
1052 if (sclp_has_sigpif())
1053 return __inject_extcall_sigpif(vcpu, src_id);
383d0b05 1054
ea5f4969
DH		 1055 if (!test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
1056 return -EBUSY;
383d0b05 1057 *extcall = irq->u.extcall;
0146a7b0
JF		 1058 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1059 return 0;
1060}
1061
383d0b05 1062static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1063{
1064 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1065 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0
JF		 1066
1067 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
556cc0da 1068 irq->u.prefix.address);
383d0b05 1069 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
556cc0da 1070 irq->u.prefix.address, 0, 2);
383d0b05 1071
a3a9c59a
DH		 1072 if (!is_vcpu_stopped(vcpu))
1073 return -EBUSY;
1074
383d0b05
JF		 1075 *prefix = irq->u.prefix;
1076 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1077 return 0;
1078}
1079
6cddd432 1080#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1081static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1082{
1083 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1084 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1085 int rc = 0;
0146a7b0 1086
383d0b05
JF		 1087 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0, 2);
1088
2822545f
DH		 1089 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1090 return -EINVAL;
1091
6cddd432
DH		 1092 if (is_vcpu_stopped(vcpu)) {
1093 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1094 rc = kvm_s390_store_status_unloaded(vcpu,
1095 KVM_S390_STORE_STATUS_NOADDR);
1096 return rc;
1097 }
1098
1099 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1100 return -EBUSY;
2822545f 1101 stop->flags = irq->u.stop.flags;
6cddd432 1102 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1103 return 0;
1104}
1105
1106static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1107 struct kvm_s390_irq *irq)
0146a7b0
JF		 1108{
1109 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1110
383d0b05
JF		 1111 VCPU_EVENT(vcpu, 3, "inject: restart type %llx", irq->type);
1112 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0, 2);
1113
1114 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1115 return 0;
1116}
1117
1118static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1119 struct kvm_s390_irq *irq)
0146a7b0
JF		 1120{
1121 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1122
383d0b05
JF		 1123 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n",
1124 irq->u.emerg.code);
1125 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
49538d12 1126 irq->u.emerg.code, 0, 2);
383d0b05 1127
49538d12 1128 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1129 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
0146a7b0
JF		 1130 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1131 return 0;
1132}
1133
383d0b05 1134static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1135{
1136 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1137 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0
JF		 1138
1139 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
556cc0da 1140 irq->u.mchk.mcic);
383d0b05 1141 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
556cc0da 1142 irq->u.mchk.mcic, 2);
383d0b05
JF		 1143
1144 /*
fc2020cf
JF		 1145 * Because repressible machine checks can be indicated along with
1146 * exigent machine checks (PoP, Chapter 11, Interruption action)
1147 * we need to combine cr14, mcic and external damage code.
1148 * Failing storage address and the logout area should not be or'ed
1149 * together, we just indicate the last occurrence of the corresponding
1150 * machine check
383d0b05 1151 */
fc2020cf 1152 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1153 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1154 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1155 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1156 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1157 sizeof(mchk->fixed_logout));
383d0b05
JF		 1158 if (mchk->mcic & MCHK_EX_MASK)
1159 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1160 else if (mchk->mcic & MCHK_REP_MASK)
1161 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1162 return 0;
1163}
1164
383d0b05 1165static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1166{
1167 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1168
383d0b05
JF		 1169 VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CLOCK_COMP);
1170 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
1171 0, 0, 2);
1172
1173 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
0146a7b0
JF		 1174 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1175 return 0;
1176}
1177
383d0b05 1178static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1179{
1180 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1181
383d0b05
JF		 1182 VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CPU_TIMER);
1183 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
1184 0, 0, 2);
1185
1186 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
0146a7b0 1187 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
ba5c1e9b
CO		 1188 return 0;
1189}
1190
383d0b05 1191
fa6b7fe9
CH		 1192struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
1193 u64 cr6, u64 schid)
1194{
1195 struct kvm_s390_float_interrupt *fi;
1196 struct kvm_s390_interrupt_info *inti, *iter;
1197
1198 if ((!schid && !cr6) || (schid && cr6))
1199 return NULL;
fa6b7fe9
CH		 1200 fi = &kvm->arch.float_int;
1201 spin_lock(&fi->lock);
1202 inti = NULL;
1203 list_for_each_entry(iter, &fi->list, list) {
1204 if (!is_ioint(iter->type))
1205 continue;
79fd50c6
CH		 1206 if (cr6 &&
1207 ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
fa6b7fe9
CH		 1208 continue;
1209 if (schid) {
1210 if (((schid & 0x00000000ffff0000) >> 16) !=
1211 iter->io.subchannel_id)
1212 continue;
1213 if ((schid & 0x000000000000ffff) !=
1214 iter->io.subchannel_nr)
1215 continue;
1216 }
1217 inti = iter;
1218 break;
1219 }
a91b8ebe 1220 if (inti) {
fa6b7fe9 1221 list_del_init(&inti->list);
a91b8ebe
JF		 1222 fi->irq_count--;
1223 }
fa6b7fe9
CH		 1224 if (list_empty(&fi->list))
1225 atomic_set(&fi->active, 0);
1226 spin_unlock(&fi->lock);
fa6b7fe9
CH		 1227 return inti;
1228}
ba5c1e9b 1229
a91b8ebe 1230static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
ba5c1e9b 1231{
180c12fb
CB		 1232 struct kvm_s390_local_interrupt *li;
1233 struct kvm_s390_float_interrupt *fi;
c05c4186 1234 struct kvm_s390_interrupt_info *iter;
1ee0bc55 1235 struct kvm_vcpu *dst_vcpu = NULL;
ba5c1e9b 1236 int sigcpu;
a91b8ebe 1237 int rc = 0;
ba5c1e9b 1238
c05c4186
JF		 1239 fi = &kvm->arch.float_int;
1240 spin_lock(&fi->lock);
a91b8ebe
JF		 1241 if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
1242 rc = -EINVAL;
1243 goto unlock_fi;
1244 }
1245 fi->irq_count++;
c05c4186
JF		 1246 if (!is_ioint(inti->type)) {
1247 list_add_tail(&inti->list, &fi->list);
1248 } else {
1249 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
1250
1251 /* Keep I/O interrupts sorted in isc order. */
1252 list_for_each_entry(iter, &fi->list, list) {
1253 if (!is_ioint(iter->type))
1254 continue;
1255 if (int_word_to_isc_bits(iter->io.io_int_word)
1256 <= isc_bits)
1257 continue;
1258 break;
1259 }
1260 list_add_tail(&inti->list, &iter->list);
1261 }
1262 atomic_set(&fi->active, 1);
8e2207cd
DH		 1263 if (atomic_read(&kvm->online_vcpus) == 0)
1264 goto unlock_fi;
c05c4186
JF		 1265 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
1266 if (sigcpu == KVM_MAX_VCPUS) {
1267 do {
1268 sigcpu = fi->next_rr_cpu++;
1269 if (sigcpu == KVM_MAX_VCPUS)
1270 sigcpu = fi->next_rr_cpu = 0;
1ee0bc55 1271 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
c05c4186 1272 }
1ee0bc55
JF		 1273 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1274 li = &dst_vcpu->arch.local_int;
4ae3c081 1275 spin_lock(&li->lock);
da00fcbd
CB		 1276 switch (inti->type) {
1277 case KVM_S390_MCHK:
1278 atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
1279 break;
1280 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1281 atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
1282 break;
1283 default:
1284 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1285 break;
1286 }
4ae3c081 1287 spin_unlock(&li->lock);
0e9c85a5 1288 kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
a91b8ebe 1289unlock_fi:
c05c4186 1290 spin_unlock(&fi->lock);
a91b8ebe 1291 return rc;
c05c4186
JF		 1292}
1293
1294int kvm_s390_inject_vm(struct kvm *kvm,
1295 struct kvm_s390_interrupt *s390int)
1296{
1297 struct kvm_s390_interrupt_info *inti;
428d53be 1298 int rc;
c05c4186 1299
ba5c1e9b
CO		 1300 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1301 if (!inti)
1302 return -ENOMEM;
1303
c05c4186
JF		 1304 inti->type = s390int->type;
1305 switch (inti->type) {
ba5c1e9b 1306 case KVM_S390_INT_VIRTIO:
33e19115 1307 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1308 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1309 inti->ext.ext_params = s390int->parm;
1310 inti->ext.ext_params2 = s390int->parm64;
1311 break;
1312 case KVM_S390_INT_SERVICE:
1313 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1314 inti->ext.ext_params = s390int->parm;
1315 break;
3c038e6b 1316 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 1317 inti->ext.ext_params2 = s390int->parm64;
1318 break;
48a3e950
CH		 1319 case KVM_S390_MCHK:
1320 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
1321 s390int->parm64);
48a3e950
CH		 1322 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1323 inti->mchk.mcic = s390int->parm64;
1324 break;
d8346b7d 1325 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
c05c4186 1326 if (inti->type & IOINT_AI_MASK)
d8346b7d
CH		 1327 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
1328 else
1329 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
1330 s390int->type & IOINT_CSSID_MASK,
1331 s390int->type & IOINT_SSID_MASK,
1332 s390int->type & IOINT_SCHID_MASK);
d8346b7d
CH		 1333 inti->io.subchannel_id = s390int->parm >> 16;
1334 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1335 inti->io.io_int_parm = s390int->parm64 >> 32;
1336 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1337 break;
ba5c1e9b
CO		 1338 default:
1339 kfree(inti);
1340 return -EINVAL;
1341 }
ade38c31
CH		 1342 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1343 2);
ba5c1e9b 1344
428d53be
DH		 1345 rc = __inject_vm(kvm, inti);
1346 if (rc)
1347 kfree(inti);
1348 return rc;
ba5c1e9b
CO		 1349}
1350
15462e37 1351int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 1352 struct kvm_s390_interrupt_info *inti)
1353{
15462e37 1354 return __inject_vm(kvm, inti);
2f32d4ea
CH		 1355}
1356
383d0b05
JF		 1357int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1358 struct kvm_s390_irq *irq)
1359{
1360 irq->type = s390int->type;
1361 switch (irq->type) {
1362 case KVM_S390_PROGRAM_INT:
1363 if (s390int->parm & 0xffff0000)
1364 return -EINVAL;
1365 irq->u.pgm.code = s390int->parm;
1366 break;
1367 case KVM_S390_SIGP_SET_PREFIX:
1368 irq->u.prefix.address = s390int->parm;
1369 break;
2822545f
DH		 1370 case KVM_S390_SIGP_STOP:
1371 irq->u.stop.flags = s390int->parm;
1372 break;
383d0b05 1373 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 1374 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1375 return -EINVAL;
1376 irq->u.extcall.code = s390int->parm;
1377 break;
1378 case KVM_S390_INT_EMERGENCY:
94d1f564 1379 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1380 return -EINVAL;
1381 irq->u.emerg.code = s390int->parm;
1382 break;
1383 case KVM_S390_MCHK:
1384 irq->u.mchk.mcic = s390int->parm64;
1385 break;
1386 }
1387 return 0;
1388}
1389
6cddd432
DH		 1390int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1391{
1392 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1393
1394 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1395}
1396
1397void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1398{
1399 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1400
1401 spin_lock(&li->lock);
1402 li->irq.stop.flags = 0;
1403 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1404 spin_unlock(&li->lock);
1405}
1406
383d0b05 1407int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 1408{
0146a7b0 1409 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0146a7b0 1410 int rc;
ba5c1e9b 1411
0146a7b0 1412 spin_lock(&li->lock);
383d0b05 1413 switch (irq->type) {
ba5c1e9b 1414 case KVM_S390_PROGRAM_INT:
ba5c1e9b 1415 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
383d0b05
JF		 1416 irq->u.pgm.code);
1417 rc = __inject_prog(vcpu, irq);
ba5c1e9b 1418 break;
b7e6e4d3 1419 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 1420 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 1421 break;
ba5c1e9b 1422 case KVM_S390_SIGP_STOP:
383d0b05 1423 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 1424 break;
ba5c1e9b 1425 case KVM_S390_RESTART:
383d0b05 1426 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 1427 break;
e029ae5b 1428 case KVM_S390_INT_CLOCK_COMP:
383d0b05 1429 rc = __inject_ckc(vcpu);
0146a7b0 1430 break;
e029ae5b 1431 case KVM_S390_INT_CPU_TIMER:
383d0b05 1432 rc = __inject_cpu_timer(vcpu);
82a12737 1433 break;
7697e71f 1434 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 1435 rc = __inject_extcall(vcpu, irq);
82a12737 1436 break;
ba5c1e9b 1437 case KVM_S390_INT_EMERGENCY:
383d0b05 1438 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 1439 break;
48a3e950 1440 case KVM_S390_MCHK:
383d0b05 1441 rc = __inject_mchk(vcpu, irq);
48a3e950 1442 break;
3c038e6b 1443 case KVM_S390_INT_PFAULT_INIT:
383d0b05 1444 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 1445 break;
ba5c1e9b
CO		 1446 case KVM_S390_INT_VIRTIO:
1447 case KVM_S390_INT_SERVICE:
d8346b7d 1448 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 1449 default:
0146a7b0 1450 rc = -EINVAL;
ba5c1e9b 1451 }
4ae3c081 1452 spin_unlock(&li->lock);
0146a7b0
JF		 1453 if (!rc)
1454 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 1455 return rc;
ba5c1e9b 1456}
c05c4186 1457
67335e63 1458void kvm_s390_clear_float_irqs(struct kvm *kvm)
c05c4186
JF		 1459{
1460 struct kvm_s390_float_interrupt *fi;
1461 struct kvm_s390_interrupt_info *n, *inti = NULL;
1462
c05c4186
JF		 1463 fi = &kvm->arch.float_int;
1464 spin_lock(&fi->lock);
1465 list_for_each_entry_safe(inti, n, &fi->list, list) {
1466 list_del(&inti->list);
1467 kfree(inti);
1468 }
a91b8ebe 1469 fi->irq_count = 0;
c05c4186
JF		 1470 atomic_set(&fi->active, 0);
1471 spin_unlock(&fi->lock);
c05c4186
JF		 1472}
1473
1474static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti,
1475 u8 *addr)
1476{
1477 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1478 struct kvm_s390_irq irq = {0};
1479
1480 irq.type = inti->type;
1481 switch (inti->type) {
3c038e6b
DD		 1482 case KVM_S390_INT_PFAULT_INIT:
1483 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1484 case KVM_S390_INT_VIRTIO:
1485 case KVM_S390_INT_SERVICE:
1486 irq.u.ext = inti->ext;
1487 break;
1488 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1489 irq.u.io = inti->io;
1490 break;
1491 case KVM_S390_MCHK:
1492 irq.u.mchk = inti->mchk;
1493 break;
1494 default:
1495 return -EINVAL;
1496 }
1497
1498 if (copy_to_user(uptr, &irq, sizeof(irq)))
1499 return -EFAULT;
1500
1501 return 0;
1502}
1503
1504static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len)
1505{
1506 struct kvm_s390_interrupt_info *inti;
1507 struct kvm_s390_float_interrupt *fi;
1508 int ret = 0;
1509 int n = 0;
1510
c05c4186
JF		 1511 fi = &kvm->arch.float_int;
1512 spin_lock(&fi->lock);
1513
1514 list_for_each_entry(inti, &fi->list, list) {
1515 if (len < sizeof(struct kvm_s390_irq)) {
1516 /* signal userspace to try again */
1517 ret = -ENOMEM;
1518 break;
1519 }
1520 ret = copy_irq_to_user(inti, buf);
1521 if (ret)
1522 break;
1523 buf += sizeof(struct kvm_s390_irq);
1524 len -= sizeof(struct kvm_s390_irq);
1525 n++;
1526 }
1527
1528 spin_unlock(&fi->lock);
c05c4186
JF		 1529
1530 return ret < 0 ? ret : n;
1531}
1532
1533static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1534{
1535 int r;
1536
1537 switch (attr->group) {
1538 case KVM_DEV_FLIC_GET_ALL_IRQS:
1539 r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr,
1540 attr->attr);
1541 break;
1542 default:
1543 r = -EINVAL;
1544 }
1545
1546 return r;
1547}
1548
1549static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1550 u64 addr)
1551{
1552 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1553 void *target = NULL;
1554 void __user *source;
1555 u64 size;
1556
1557 if (get_user(inti->type, (u64 __user *)addr))
1558 return -EFAULT;
1559
1560 switch (inti->type) {
3c038e6b
DD		 1561 case KVM_S390_INT_PFAULT_INIT:
1562 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1563 case KVM_S390_INT_VIRTIO:
1564 case KVM_S390_INT_SERVICE:
1565 target = (void *) &inti->ext;
1566 source = &uptr->u.ext;
1567 size = sizeof(inti->ext);
1568 break;
1569 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1570 target = (void *) &inti->io;
1571 source = &uptr->u.io;
1572 size = sizeof(inti->io);
1573 break;
1574 case KVM_S390_MCHK:
1575 target = (void *) &inti->mchk;
1576 source = &uptr->u.mchk;
1577 size = sizeof(inti->mchk);
1578 break;
1579 default:
1580 return -EINVAL;
1581 }
1582
1583 if (copy_from_user(target, source, size))
1584 return -EFAULT;
1585
1586 return 0;
1587}
1588
1589static int enqueue_floating_irq(struct kvm_device *dev,
1590 struct kvm_device_attr *attr)
1591{
1592 struct kvm_s390_interrupt_info *inti = NULL;
1593 int r = 0;
1594 int len = attr->attr;
1595
1596 if (len % sizeof(struct kvm_s390_irq) != 0)
1597 return -EINVAL;
1598 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1599 return -EINVAL;
1600
1601 while (len >= sizeof(struct kvm_s390_irq)) {
1602 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1603 if (!inti)
1604 return -ENOMEM;
1605
1606 r = copy_irq_from_user(inti, attr->addr);
1607 if (r) {
1608 kfree(inti);
1609 return r;
1610 }
a91b8ebe
JF		 1611 r = __inject_vm(dev->kvm, inti);
1612 if (r) {
1613 kfree(inti);
1614 return r;
1615 }
c05c4186
JF		 1616 len -= sizeof(struct kvm_s390_irq);
1617 attr->addr += sizeof(struct kvm_s390_irq);
1618 }
1619
1620 return r;
1621}
1622
841b91c5
CH		 1623static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1624{
1625 if (id >= MAX_S390_IO_ADAPTERS)
1626 return NULL;
1627 return kvm->arch.adapters[id];
1628}
1629
1630static int register_io_adapter(struct kvm_device *dev,
1631 struct kvm_device_attr *attr)
1632{
1633 struct s390_io_adapter *adapter;
1634 struct kvm_s390_io_adapter adapter_info;
1635
1636 if (copy_from_user(&adapter_info,
1637 (void __user *)attr->addr, sizeof(adapter_info)))
1638 return -EFAULT;
1639
1640 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1641 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1642 return -EINVAL;
1643
1644 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1645 if (!adapter)
1646 return -ENOMEM;
1647
1648 INIT_LIST_HEAD(&adapter->maps);
1649 init_rwsem(&adapter->maps_lock);
1650 atomic_set(&adapter->nr_maps, 0);
1651 adapter->id = adapter_info.id;
1652 adapter->isc = adapter_info.isc;
1653 adapter->maskable = adapter_info.maskable;
1654 adapter->masked = false;
1655 adapter->swap = adapter_info.swap;
1656 dev->kvm->arch.adapters[adapter->id] = adapter;
1657
1658 return 0;
1659}
1660
1661int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1662{
1663 int ret;
1664 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1665
1666 if (!adapter || !adapter->maskable)
1667 return -EINVAL;
1668 ret = adapter->masked;
1669 adapter->masked = masked;
1670 return ret;
1671}
1672
1673static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1674{
1675 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1676 struct s390_map_info *map;
1677 int ret;
1678
1679 if (!adapter || !addr)
1680 return -EINVAL;
1681
1682 map = kzalloc(sizeof(*map), GFP_KERNEL);
1683 if (!map) {
1684 ret = -ENOMEM;
1685 goto out;
1686 }
1687 INIT_LIST_HEAD(&map->list);
1688 map->guest_addr = addr;
6e0a0431 1689 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 1690 if (map->addr == -EFAULT) {
1691 ret = -EFAULT;
1692 goto out;
1693 }
1694 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1695 if (ret < 0)
1696 goto out;
1697 BUG_ON(ret != 1);
1698 down_write(&adapter->maps_lock);
1699 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1700 list_add_tail(&map->list, &adapter->maps);
1701 ret = 0;
1702 } else {
1703 put_page(map->page);
1704 ret = -EINVAL;
1705 }
1706 up_write(&adapter->maps_lock);
1707out:
1708 if (ret)
1709 kfree(map);
1710 return ret;
1711}
1712
1713static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1714{
1715 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1716 struct s390_map_info *map, *tmp;
1717 int found = 0;
1718
1719 if (!adapter || !addr)
1720 return -EINVAL;
1721
1722 down_write(&adapter->maps_lock);
1723 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1724 if (map->guest_addr == addr) {
1725 found = 1;
1726 atomic_dec(&adapter->nr_maps);
1727 list_del(&map->list);
1728 put_page(map->page);
1729 kfree(map);
1730 break;
1731 }
1732 }
1733 up_write(&adapter->maps_lock);
1734
1735 return found ? 0 : -EINVAL;
1736}
1737
1738void kvm_s390_destroy_adapters(struct kvm *kvm)
1739{
1740 int i;
1741 struct s390_map_info *map, *tmp;
1742
1743 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1744 if (!kvm->arch.adapters[i])
1745 continue;
1746 list_for_each_entry_safe(map, tmp,
1747 &kvm->arch.adapters[i]->maps, list) {
1748 list_del(&map->list);
1749 put_page(map->page);
1750 kfree(map);
1751 }
1752 kfree(kvm->arch.adapters[i]);
1753 }
1754}
1755
1756static int modify_io_adapter(struct kvm_device *dev,
1757 struct kvm_device_attr *attr)
1758{
1759 struct kvm_s390_io_adapter_req req;
1760 struct s390_io_adapter *adapter;
1761 int ret;
1762
1763 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1764 return -EFAULT;
1765
1766 adapter = get_io_adapter(dev->kvm, req.id);
1767 if (!adapter)
1768 return -EINVAL;
1769 switch (req.type) {
1770 case KVM_S390_IO_ADAPTER_MASK:
1771 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1772 if (ret > 0)
1773 ret = 0;
1774 break;
1775 case KVM_S390_IO_ADAPTER_MAP:
1776 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1777 break;
1778 case KVM_S390_IO_ADAPTER_UNMAP:
1779 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1780 break;
1781 default:
1782 ret = -EINVAL;
1783 }
1784
1785 return ret;
1786}
1787
c05c4186
JF		 1788static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1789{
1790 int r = 0;
3c038e6b
DD		 1791 unsigned int i;
1792 struct kvm_vcpu *vcpu;
c05c4186
JF		 1793
1794 switch (attr->group) {
1795 case KVM_DEV_FLIC_ENQUEUE:
1796 r = enqueue_floating_irq(dev, attr);
1797 break;
1798 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 1799 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 1800 break;
3c038e6b
DD		 1801 case KVM_DEV_FLIC_APF_ENABLE:
1802 dev->kvm->arch.gmap->pfault_enabled = 1;
1803 break;
1804 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1805 dev->kvm->arch.gmap->pfault_enabled = 0;
1806 /*
1807 * Make sure no async faults are in transition when
1808 * clearing the queues. So we don't need to worry
1809 * about late coming workers.
1810 */
1811 synchronize_srcu(&dev->kvm->srcu);
1812 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1813 kvm_clear_async_pf_completion_queue(vcpu);
1814 break;
841b91c5
CH		 1815 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1816 r = register_io_adapter(dev, attr);
1817 break;
1818 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1819 r = modify_io_adapter(dev, attr);
1820 break;
c05c4186
JF		 1821 default:
1822 r = -EINVAL;
1823 }
1824
1825 return r;
1826}
1827
1828static int flic_create(struct kvm_device *dev, u32 type)
1829{
1830 if (!dev)
1831 return -EINVAL;
1832 if (dev->kvm->arch.flic)
1833 return -EINVAL;
1834 dev->kvm->arch.flic = dev;
1835 return 0;
1836}
1837
1838static void flic_destroy(struct kvm_device *dev)
1839{
1840 dev->kvm->arch.flic = NULL;
1841 kfree(dev);
1842}
1843
1844/* s390 floating irq controller (flic) */
1845struct kvm_device_ops kvm_flic_ops = {
1846 .name = "kvm-flic",
1847 .get_attr = flic_get_attr,
1848 .set_attr = flic_set_attr,
1849 .create = flic_create,
1850 .destroy = flic_destroy,
1851};
84223598
CH		 1852
1853static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
1854{
1855 unsigned long bit;
1856
1857 bit = bit_nr + (addr % PAGE_SIZE) * 8;
1858
1859 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
1860}
1861
1862static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
1863 u64 addr)
1864{
1865 struct s390_map_info *map;
1866
1867 if (!adapter)
1868 return NULL;
1869
1870 list_for_each_entry(map, &adapter->maps, list) {
1871 if (map->guest_addr == addr)
1872 return map;
1873 }
1874 return NULL;
1875}
1876
1877static int adapter_indicators_set(struct kvm *kvm,
1878 struct s390_io_adapter *adapter,
1879 struct kvm_s390_adapter_int *adapter_int)
1880{
1881 unsigned long bit;
1882 int summary_set, idx;
1883 struct s390_map_info *info;
1884 void *map;
1885
1886 info = get_map_info(adapter, adapter_int->ind_addr);
1887 if (!info)
1888 return -1;
1889 map = page_address(info->page);
1890 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
1891 set_bit(bit, map);
1892 idx = srcu_read_lock(&kvm->srcu);
1893 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1894 set_page_dirty_lock(info->page);
1895 info = get_map_info(adapter, adapter_int->summary_addr);
1896 if (!info) {
1897 srcu_read_unlock(&kvm->srcu, idx);
1898 return -1;
1899 }
1900 map = page_address(info->page);
1901 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
1902 adapter->swap);
1903 summary_set = test_and_set_bit(bit, map);
1904 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1905 set_page_dirty_lock(info->page);
1906 srcu_read_unlock(&kvm->srcu, idx);
1907 return summary_set ? 0 : 1;
1908}
1909
1910/*
1911 * < 0 - not injected due to error
1912 * = 0 - coalesced, summary indicator already active
1913 * > 0 - injected interrupt
1914 */
1915static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
1916 struct kvm *kvm, int irq_source_id, int level,
1917 bool line_status)
1918{
1919 int ret;
1920 struct s390_io_adapter *adapter;
1921
1922 /* We're only interested in the 0->1 transition. */
1923 if (!level)
1924 return 0;
1925 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
1926 if (!adapter)
1927 return -1;
1928 down_read(&adapter->maps_lock);
1929 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
1930 up_read(&adapter->maps_lock);
1931 if ((ret > 0) && !adapter->masked) {
1932 struct kvm_s390_interrupt s390int = {
1933 .type = KVM_S390_INT_IO(1, 0, 0, 0),
1934 .parm = 0,
1935 .parm64 = (adapter->isc << 27) | 0x80000000,
1936 };
1937 ret = kvm_s390_inject_vm(kvm, &s390int);
1938 if (ret == 0)
1939 ret = 1;
1940 }
1941 return ret;
1942}
1943
8ba918d4 1944int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 1945 const struct kvm_irq_routing_entry *ue)
1946{
1947 int ret;
1948
1949 switch (ue->type) {
1950 case KVM_IRQ_ROUTING_S390_ADAPTER:
1951 e->set = set_adapter_int;
1952 e->adapter.summary_addr = ue->u.adapter.summary_addr;
1953 e->adapter.ind_addr = ue->u.adapter.ind_addr;
1954 e->adapter.summary_offset = ue->u.adapter.summary_offset;
1955 e->adapter.ind_offset = ue->u.adapter.ind_offset;
1956 e->adapter.adapter_id = ue->u.adapter.adapter_id;
1957 ret = 0;
1958 break;
1959 default:
1960 ret = -EINVAL;
1961 }
1962
1963 return ret;
1964}
1965
1966int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
1967 int irq_source_id, int level, bool line_status)
1968{
1969 return -EINVAL;
1970}
ubuntu-bionic-kernel mirror