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KVM: s390: fix get_all_floating_irqs
[mirror_ubuntu-jammy-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>
94aa033e 20#include <linux/vmalloc.h>
cbb870c8 21#include <asm/asm-offsets.h>
33b412ac 22#include <asm/dis.h>
cbb870c8 23#include <asm/uaccess.h>
ea5f4969 24#include <asm/sclp.h>
ba5c1e9b
CO		 25#include "kvm-s390.h"
26#include "gaccess.h"
ade38c31 27#include "trace-s390.h"
ba5c1e9b 28
d8346b7d
CH		 29#define IOINT_SCHID_MASK 0x0000ffff
30#define IOINT_SSID_MASK 0x00030000
31#define IOINT_CSSID_MASK 0x03fc0000
32#define IOINT_AI_MASK 0x04000000
44c6ca3d 33#define PFAULT_INIT 0x0600
60f90a14
JF		 34#define PFAULT_DONE 0x0680
35#define VIRTIO_PARAM 0x0d00
d8346b7d
CH		 36
37static int is_ioint(u64 type)
38{
39 return ((type & 0xfffe0000u) != 0xfffe0000u);
40}
41
3c038e6b 42int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 43{
44 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
45}
46
d8346b7d
CH		 47static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
48{
49 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
50}
51
48a3e950
CH		 52static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
53{
54 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
55}
56
ba5c1e9b
CO		 57static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
58{
59 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
60 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
61 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
62 return 0;
63 return 1;
64}
65
bb78c5ec
DH		 66static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
67{
68 if (psw_extint_disabled(vcpu) ||
69 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
70 return 0;
f71d0dc5
DH		 71 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
72 /* No timer interrupts when single stepping */
73 return 0;
bb78c5ec
DH		 74 return 1;
75}
76
79fd50c6
CH		 77static u64 int_word_to_isc_bits(u32 int_word)
78{
79 u8 isc = (int_word & 0x38000000) >> 27;
80
81 return (0x80 >> isc) << 24;
82}
83
614aeab4 84static int __must_check __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
180c12fb 85 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 86{
87 switch (inti->type) {
7697e71f
CE		 88 case KVM_S390_INT_EXTERNAL_CALL:
89 if (psw_extint_disabled(vcpu))
90 return 0;
91 if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
92 return 1;
f346026e 93 return 0;
ba5c1e9b
CO		 94 case KVM_S390_INT_EMERGENCY:
95 if (psw_extint_disabled(vcpu))
96 return 0;
97 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
98 return 1;
99 return 0;
e029ae5b
TH		 100 case KVM_S390_INT_CLOCK_COMP:
101 return ckc_interrupts_enabled(vcpu);
102 case KVM_S390_INT_CPU_TIMER:
103 if (psw_extint_disabled(vcpu))
104 return 0;
105 if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
106 return 1;
107 return 0;
ba5c1e9b 108 case KVM_S390_INT_SERVICE:
3c038e6b
DD		 109 case KVM_S390_INT_PFAULT_INIT:
110 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 111 case KVM_S390_INT_VIRTIO:
112 if (psw_extint_disabled(vcpu))
113 return 0;
114 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
115 return 1;
116 return 0;
117 case KVM_S390_PROGRAM_INT:
118 case KVM_S390_SIGP_STOP:
119 case KVM_S390_SIGP_SET_PREFIX:
120 case KVM_S390_RESTART:
121 return 1;
48a3e950
CH		 122 case KVM_S390_MCHK:
123 if (psw_mchk_disabled(vcpu))
124 return 0;
125 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
126 return 1;
127 return 0;
d8346b7d
CH		 128 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
129 if (psw_ioint_disabled(vcpu))
130 return 0;
79fd50c6
CH		 131 if (vcpu->arch.sie_block->gcr[6] &
132 int_word_to_isc_bits(inti->io.io_int_word))
d8346b7d
CH		 133 return 1;
134 return 0;
ba5c1e9b 135 default:
d8346b7d
CH		 136 printk(KERN_WARNING "illegal interrupt type %llx\n",
137 inti->type);
ba5c1e9b
CO		 138 BUG();
139 }
140 return 0;
141}
142
383d0b05
JF		 143static inline unsigned long pending_local_irqs(struct kvm_vcpu *vcpu)
144{
145 return vcpu->arch.local_int.pending_irqs;
146}
147
148static unsigned long deliverable_local_irqs(struct kvm_vcpu *vcpu)
149{
150 unsigned long active_mask = pending_local_irqs(vcpu);
151
152 if (psw_extint_disabled(vcpu))
153 active_mask &= ~IRQ_PEND_EXT_MASK;
154 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
155 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
156 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
157 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
158 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
159 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
160 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
161 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
162 if (psw_mchk_disabled(vcpu))
163 active_mask &= ~IRQ_PEND_MCHK_MASK;
164
6cddd432
DH		 165 /*
166 * STOP irqs will never be actively delivered. They are triggered via
167 * intercept requests and cleared when the stop intercept is performed.
168 */
169 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
170
383d0b05
JF		 171 return active_mask;
172}
173
ba5c1e9b
CO		 174static void __set_cpu_idle(struct kvm_vcpu *vcpu)
175{
ba5c1e9b
CO		 176 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
177 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
178}
179
180static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
181{
ba5c1e9b
CO		 182 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
183 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
184}
185
186static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
187{
4953919f
DH		 188 atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
189 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 190 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 191 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
192
193 if (guestdbg_enabled(vcpu)) {
194 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
195 LCTL_CR10 | LCTL_CR11);
196 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
197 }
ba5c1e9b
CO		 198}
199
200static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
201{
202 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
203}
204
383d0b05
JF		 205static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
206{
207 if (!(pending_local_irqs(vcpu) & IRQ_PEND_EXT_MASK))
208 return;
209 if (psw_extint_disabled(vcpu))
210 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
211 else
212 vcpu->arch.sie_block->lctl |= LCTL_CR0;
213}
214
215static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
216{
217 if (!(pending_local_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
218 return;
219 if (psw_mchk_disabled(vcpu))
220 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
221 else
222 vcpu->arch.sie_block->lctl |= LCTL_CR14;
223}
224
6cddd432
DH		 225static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
226{
227 if (kvm_s390_is_stop_irq_pending(vcpu))
228 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
229}
230
383d0b05
JF		 231/* Set interception request for non-deliverable local interrupts */
232static void set_intercept_indicators_local(struct kvm_vcpu *vcpu)
233{
234 set_intercept_indicators_ext(vcpu);
235 set_intercept_indicators_mchk(vcpu);
6cddd432 236 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 237}
238
ba5c1e9b 239static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
180c12fb 240 struct kvm_s390_interrupt_info *inti)
ba5c1e9b
CO		 241{
242 switch (inti->type) {
ba5c1e9b 243 case KVM_S390_INT_SERVICE:
3c038e6b 244 case KVM_S390_INT_PFAULT_DONE:
ba5c1e9b
CO		 245 case KVM_S390_INT_VIRTIO:
246 if (psw_extint_disabled(vcpu))
247 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
248 else
249 vcpu->arch.sie_block->lctl |= LCTL_CR0;
250 break;
48a3e950
CH		 251 case KVM_S390_MCHK:
252 if (psw_mchk_disabled(vcpu))
253 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
254 else
255 vcpu->arch.sie_block->lctl |= LCTL_CR14;
256 break;
d8346b7d
CH		 257 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
258 if (psw_ioint_disabled(vcpu))
259 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
260 else
261 vcpu->arch.sie_block->lctl |= LCTL_CR6;
262 break;
ba5c1e9b
CO		 263 default:
264 BUG();
265 }
266}
267
8a2ef71b
JF		 268static u16 get_ilc(struct kvm_vcpu *vcpu)
269{
8a2ef71b
JF		 270 switch (vcpu->arch.sie_block->icptcode) {
271 case ICPT_INST:
272 case ICPT_INSTPROGI:
273 case ICPT_OPEREXC:
274 case ICPT_PARTEXEC:
275 case ICPT_IOINST:
276 /* last instruction only stored for these icptcodes */
33b412ac 277 return insn_length(vcpu->arch.sie_block->ipa >> 8);
8a2ef71b
JF		 278 case ICPT_PROGI:
279 return vcpu->arch.sie_block->pgmilc;
280 default:
281 return 0;
282 }
283}
284
0fb97abe
JF		 285static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
286{
383d0b05 287 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 288 int rc;
289
290 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
291 0, 0);
292
293 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
294 (u16 *)__LC_EXT_INT_CODE);
467fc298 295 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 296 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
297 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
298 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
299 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 300 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 301 return rc ? -EFAULT : 0;
0fb97abe
JF		 302}
303
304static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
305{
383d0b05 306 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 307 int rc;
308
309 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
310 0, 0);
311
312 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
313 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 314 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 315 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
316 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
317 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
318 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 319 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 320 return rc ? -EFAULT : 0;
0fb97abe
JF		 321}
322
383d0b05 323static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 324{
383d0b05
JF		 325 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
326 struct kvm_s390_ext_info ext;
0fb97abe
JF		 327 int rc;
328
383d0b05
JF		 329 spin_lock(&li->lock);
330 ext = li->irq.ext;
331 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
332 li->irq.ext.ext_params2 = 0;
333 spin_unlock(&li->lock);
334
0fb97abe 335 VCPU_EVENT(vcpu, 4, "interrupt: pfault init parm:%x,parm64:%llx",
383d0b05 336 0, ext.ext_params2);
0fb97abe
JF		 337 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
338 KVM_S390_INT_PFAULT_INIT,
383d0b05 339 0, ext.ext_params2);
0fb97abe
JF		 340
341 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
342 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
343 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
344 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
345 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
346 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 347 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 348 return rc ? -EFAULT : 0;
0fb97abe
JF		 349}
350
383d0b05 351static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 352{
383d0b05
JF		 353 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
354 struct kvm_s390_mchk_info mchk;
bc17de7c 355 unsigned long adtl_status_addr;
0fb97abe
JF		 356 int rc;
357
383d0b05
JF		 358 spin_lock(&li->lock);
359 mchk = li->irq.mchk;
360 /*
361 * If there was an exigent machine check pending, then any repressible
362 * machine checks that might have been pending are indicated along
363 * with it, so always clear both bits
364 */
365 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
366 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
367 memset(&li->irq.mchk, 0, sizeof(mchk));
368 spin_unlock(&li->lock);
369
0fb97abe 370 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
383d0b05 371 mchk.mcic);
0fb97abe 372 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
383d0b05 373 mchk.cr14, mchk.mcic);
0fb97abe
JF		 374
375 rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
bc17de7c
EF		 376 rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR,
377 &adtl_status_addr, sizeof(unsigned long));
378 rc |= kvm_s390_vcpu_store_adtl_status(vcpu, adtl_status_addr);
383d0b05 379 rc |= put_guest_lc(vcpu, mchk.mcic,
0fb97abe 380 (u64 __user *) __LC_MCCK_CODE);
383d0b05 381 rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
0fb97abe
JF		 382 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
383 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
383d0b05 384 &mchk.fixed_logout, sizeof(mchk.fixed_logout));
0fb97abe
JF		 385 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
386 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
387 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
388 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 389 return rc ? -EFAULT : 0;
0fb97abe
JF		 390}
391
392static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
393{
383d0b05 394 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 395 int rc;
396
397 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
398 vcpu->stat.deliver_restart_signal++;
399 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
400
401 rc = write_guest_lc(vcpu,
402 offsetof(struct _lowcore, restart_old_psw),
403 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
404 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
405 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 406 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 407 return rc ? -EFAULT : 0;
0fb97abe
JF		 408}
409
383d0b05 410static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 411{
383d0b05
JF		 412 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
413 struct kvm_s390_prefix_info prefix;
414
415 spin_lock(&li->lock);
416 prefix = li->irq.prefix;
417 li->irq.prefix.address = 0;
418 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
419 spin_unlock(&li->lock);
0fb97abe 420
383d0b05 421 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x", prefix.address);
0fb97abe
JF		 422 vcpu->stat.deliver_prefix_signal++;
423 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
424 KVM_S390_SIGP_SET_PREFIX,
383d0b05 425 prefix.address, 0);
0fb97abe 426
383d0b05 427 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 428 return 0;
429}
430
383d0b05 431static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 432{
383d0b05 433 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 434 int rc;
383d0b05
JF		 435 int cpu_addr;
436
437 spin_lock(&li->lock);
438 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
439 clear_bit(cpu_addr, li->sigp_emerg_pending);
440 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
441 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
442 spin_unlock(&li->lock);
0fb97abe
JF		 443
444 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
445 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 446 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
447 cpu_addr, 0);
0fb97abe
JF		 448
449 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
450 (u16 *)__LC_EXT_INT_CODE);
383d0b05 451 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 452 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
453 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
454 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
455 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 456 return rc ? -EFAULT : 0;
0fb97abe
JF		 457}
458
383d0b05 459static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 460{
383d0b05
JF		 461 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
462 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 463 int rc;
464
383d0b05
JF		 465 spin_lock(&li->lock);
466 extcall = li->irq.extcall;
467 li->irq.extcall.code = 0;
468 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
469 spin_unlock(&li->lock);
470
0fb97abe
JF		 471 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
472 vcpu->stat.deliver_external_call++;
473 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
474 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 475 extcall.code, 0);
0fb97abe
JF		 476
477 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
478 (u16 *)__LC_EXT_INT_CODE);
383d0b05 479 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 480 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
481 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
482 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
483 sizeof(psw_t));
99e20009 484 return rc ? -EFAULT : 0;
0fb97abe
JF		 485}
486
383d0b05 487static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 488{
383d0b05
JF		 489 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
490 struct kvm_s390_pgm_info pgm_info;
a9a846fd 491 int rc = 0, nullifying = false;
8a2ef71b 492 u16 ilc = get_ilc(vcpu);
8712836b 493
383d0b05
JF		 494 spin_lock(&li->lock);
495 pgm_info = li->irq.pgm;
496 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
497 memset(&li->irq.pgm, 0, sizeof(pgm_info));
498 spin_unlock(&li->lock);
499
0fb97abe 500 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
383d0b05 501 pgm_info.code, ilc);
0fb97abe
JF		 502 vcpu->stat.deliver_program_int++;
503 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 504 pgm_info.code, 0);
0fb97abe 505
383d0b05 506 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 507 case PGM_AFX_TRANSLATION:
508 case PGM_ASX_TRANSLATION:
509 case PGM_EX_TRANSLATION:
510 case PGM_LFX_TRANSLATION:
511 case PGM_LSTE_SEQUENCE:
512 case PGM_LSX_TRANSLATION:
513 case PGM_LX_TRANSLATION:
514 case PGM_PRIMARY_AUTHORITY:
515 case PGM_SECONDARY_AUTHORITY:
a9a846fd
TH		 516 nullifying = true;
517 /* fall through */
8712836b 518 case PGM_SPACE_SWITCH:
383d0b05 519 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 520 (u64 *)__LC_TRANS_EXC_CODE);
521 break;
522 case PGM_ALEN_TRANSLATION:
523 case PGM_ALE_SEQUENCE:
524 case PGM_ASTE_INSTANCE:
525 case PGM_ASTE_SEQUENCE:
526 case PGM_ASTE_VALIDITY:
527 case PGM_EXTENDED_AUTHORITY:
383d0b05 528 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 529 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 530 nullifying = true;
8712836b
DH		 531 break;
532 case PGM_ASCE_TYPE:
533 case PGM_PAGE_TRANSLATION:
534 case PGM_REGION_FIRST_TRANS:
535 case PGM_REGION_SECOND_TRANS:
536 case PGM_REGION_THIRD_TRANS:
537 case PGM_SEGMENT_TRANSLATION:
383d0b05 538 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 539 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 540 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 541 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 542 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 543 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 544 nullifying = true;
8712836b
DH		 545 break;
546 case PGM_MONITOR:
383d0b05 547 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 548 (u16 *)__LC_MON_CLASS_NR);
383d0b05 549 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 550 (u64 *)__LC_MON_CODE);
551 break;
403c8648 552 case PGM_VECTOR_PROCESSING:
8712836b 553 case PGM_DATA:
383d0b05 554 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 555 (u32 *)__LC_DATA_EXC_CODE);
556 break;
557 case PGM_PROTECTION:
383d0b05 558 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 559 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 560 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 561 (u8 *)__LC_EXC_ACCESS_ID);
562 break;
a9a846fd
TH		 563 case PGM_STACK_FULL:
564 case PGM_STACK_EMPTY:
565 case PGM_STACK_SPECIFICATION:
566 case PGM_STACK_TYPE:
567 case PGM_STACK_OPERATION:
568 case PGM_TRACE_TABEL:
569 case PGM_CRYPTO_OPERATION:
570 nullifying = true;
571 break;
8712836b
DH		 572 }
573
383d0b05
JF		 574 if (pgm_info.code & PGM_PER) {
575 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 576 (u8 *) __LC_PER_CODE);
383d0b05 577 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 578 (u8 *)__LC_PER_ATMID);
383d0b05 579 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 580 (u64 *) __LC_PER_ADDRESS);
383d0b05 581 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 582 (u8 *) __LC_PER_ACCESS_ID);
583 }
584
a9a846fd
TH		 585 if (nullifying && vcpu->arch.sie_block->icptcode == ICPT_INST)
586 kvm_s390_rewind_psw(vcpu, ilc);
587
8a2ef71b 588 rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
2ba45968
DH		 589 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
590 (u64 *) __LC_LAST_BREAK);
383d0b05 591 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 592 (u16 *)__LC_PGM_INT_CODE);
593 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
594 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
595 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
596 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 597 return rc ? -EFAULT : 0;
0fb97abe
JF		 598}
599
600static int __must_check __deliver_service(struct kvm_vcpu *vcpu,
601 struct kvm_s390_interrupt_info *inti)
602{
603 int rc;
604
605 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
606 inti->ext.ext_params);
607 vcpu->stat.deliver_service_signal++;
608 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
609 inti->ext.ext_params, 0);
610
611 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 612 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 613 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
614 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
615 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
616 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
617 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
618 (u32 *)__LC_EXT_PARAMS);
99e20009 619 return rc ? -EFAULT : 0;
0fb97abe
JF		 620}
621
622static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu,
623 struct kvm_s390_interrupt_info *inti)
624{
625 int rc;
626
627 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
628 KVM_S390_INT_PFAULT_DONE, 0,
629 inti->ext.ext_params2);
8712836b 630
0fb97abe
JF		 631 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
632 rc |= put_guest_lc(vcpu, PFAULT_DONE, (u16 *)__LC_EXT_CPU_ADDR);
633 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
634 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
635 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
636 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
637 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
638 (u64 *)__LC_EXT_PARAMS2);
99e20009 639 return rc ? -EFAULT : 0;
0fb97abe
JF		 640}
641
642static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu,
643 struct kvm_s390_interrupt_info *inti)
644{
645 int rc;
646
647 VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
648 inti->ext.ext_params, inti->ext.ext_params2);
649 vcpu->stat.deliver_virtio_interrupt++;
650 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
651 inti->ext.ext_params,
652 inti->ext.ext_params2);
653
654 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *)__LC_EXT_INT_CODE);
655 rc |= put_guest_lc(vcpu, VIRTIO_PARAM, (u16 *)__LC_EXT_CPU_ADDR);
656 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
657 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
658 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
659 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
660 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
661 (u32 *)__LC_EXT_PARAMS);
662 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
663 (u64 *)__LC_EXT_PARAMS2);
99e20009 664 return rc ? -EFAULT : 0;
0fb97abe
JF		 665}
666
667static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
668 struct kvm_s390_interrupt_info *inti)
669{
670 int rc;
671
672 VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
673 vcpu->stat.deliver_io_int++;
674 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
675 ((__u32)inti->io.subchannel_id << 16) |
676 inti->io.subchannel_nr,
677 ((__u64)inti->io.io_int_parm << 32) |
678 inti->io.io_int_word);
679
680 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
681 (u16 *)__LC_SUBCHANNEL_ID);
682 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
683 (u16 *)__LC_SUBCHANNEL_NR);
684 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
685 (u32 *)__LC_IO_INT_PARM);
686 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
687 (u32 *)__LC_IO_INT_WORD);
688 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
689 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
690 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
691 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 692 return rc ? -EFAULT : 0;
8712836b
DH		 693}
694
383d0b05
JF		 695static int __must_check __deliver_mchk_floating(struct kvm_vcpu *vcpu,
696 struct kvm_s390_interrupt_info *inti)
697{
698 struct kvm_s390_mchk_info *mchk = &inti->mchk;
699 int rc;
700
701 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
702 mchk->mcic);
703 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_MCHK,
704 mchk->cr14, mchk->mcic);
705
706 rc = kvm_s390_vcpu_store_status(vcpu, KVM_S390_STORE_STATUS_PREFIXED);
707 rc |= put_guest_lc(vcpu, mchk->mcic,
708 (u64 __user *) __LC_MCCK_CODE);
709 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
710 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
711 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
712 &mchk->fixed_logout, sizeof(mchk->fixed_logout));
713 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
714 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
715 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
716 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 717 return rc ? -EFAULT : 0;
383d0b05
JF		 718}
719
720typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
721
722static const deliver_irq_t deliver_irq_funcs[] = {
723 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
724 [IRQ_PEND_PROG] = __deliver_prog,
725 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
726 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
727 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
728 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
729 [IRQ_PEND_RESTART] = __deliver_restart,
383d0b05
JF		 730 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
731 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
732};
733
734static int __must_check __deliver_floating_interrupt(struct kvm_vcpu *vcpu,
735 struct kvm_s390_interrupt_info *inti)
ba5c1e9b 736{
0fb97abe 737 int rc;
ba5c1e9b
CO		 738
739 switch (inti->type) {
ba5c1e9b 740 case KVM_S390_INT_SERVICE:
0fb97abe 741 rc = __deliver_service(vcpu, inti);
ba5c1e9b 742 break;
3c038e6b 743 case KVM_S390_INT_PFAULT_DONE:
0fb97abe 744 rc = __deliver_pfault_done(vcpu, inti);
3c038e6b 745 break;
ba5c1e9b 746 case KVM_S390_INT_VIRTIO:
0fb97abe 747 rc = __deliver_virtio(vcpu, inti);
ba5c1e9b 748 break;
48a3e950 749 case KVM_S390_MCHK:
383d0b05 750 rc = __deliver_mchk_floating(vcpu, inti);
48a3e950 751 break;
d8346b7d 752 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
0fb97abe 753 rc = __deliver_io(vcpu, inti);
d8346b7d 754 break;
ba5c1e9b
CO		 755 default:
756 BUG();
757 }
79395031
JF		 758
759 return rc;
ba5c1e9b
CO		 760}
761
ea5f4969
DH		 762/* Check whether an external call is pending (deliverable or not) */
763int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 764{
ea5f4969
DH		 765 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
766 uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
4953919f 767
ea5f4969
DH		 768 if (!sclp_has_sigpif())
769 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 770
ea5f4969
DH		 771 return (sigp_ctrl & SIGP_CTRL_C) &&
772 (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND);
4953919f
DH		 773}
774
9a022067 775int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 776{
180c12fb
CB		 777 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
778 struct kvm_s390_interrupt_info *inti;
383d0b05 779 int rc;
ba5c1e9b 780
383d0b05 781 rc = !!deliverable_local_irqs(vcpu);
ba5c1e9b
CO		 782
783 if ((!rc) && atomic_read(&fi->active)) {
b037a4f3 784 spin_lock(&fi->lock);
ba5c1e9b
CO		 785 list_for_each_entry(inti, &fi->list, list)
786 if (__interrupt_is_deliverable(vcpu, inti)) {
787 rc = 1;
788 break;
789 }
b037a4f3 790 spin_unlock(&fi->lock);
ba5c1e9b
CO		 791 }
792
bb78c5ec
DH		 793 if (!rc && kvm_cpu_has_pending_timer(vcpu))
794 rc = 1;
ba5c1e9b 795
ea5f4969
DH		 796 /* external call pending and deliverable */
797 if (!rc && kvm_s390_ext_call_pending(vcpu) &&
798 !psw_extint_disabled(vcpu) &&
799 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
4953919f
DH		 800 rc = 1;
801
9a022067 802 if (!rc && !exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
6cddd432
DH		 803 rc = 1;
804
ba5c1e9b
CO		 805 return rc;
806}
807
3d80840d
MT		 808int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
809{
bb78c5ec
DH		 810 if (!(vcpu->arch.sie_block->ckc <
811 get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
812 return 0;
813 if (!ckc_interrupts_enabled(vcpu))
814 return 0;
815 return 1;
3d80840d
MT		 816}
817
ba5c1e9b
CO		 818int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
819{
820 u64 now, sltime;
ba5c1e9b
CO		 821
822 vcpu->stat.exit_wait_state++;
ba5c1e9b 823
0759d068
DH		 824 /* fast path */
825 if (kvm_cpu_has_pending_timer(vcpu) || kvm_arch_vcpu_runnable(vcpu))
826 return 0;
e52b2af5 827
ba5c1e9b
CO		 828 if (psw_interrupts_disabled(vcpu)) {
829 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 830 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 831 }
832
bb78c5ec 833 if (!ckc_interrupts_enabled(vcpu)) {
ba5c1e9b 834 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 835 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 836 goto no_timer;
837 }
838
8c071b0f 839 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
ed4f2094 840 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
bda343ef
DH		 841
842 /* underflow */
843 if (vcpu->arch.sie_block->ckc < now)
844 return 0;
845
846 __set_cpu_idle(vcpu);
ca872302
CB		 847 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
848 VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
ba5c1e9b 849no_timer:
800c1065 850 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 851 kvm_vcpu_block(vcpu);
ba5c1e9b 852 __unset_cpu_idle(vcpu);
800c1065
TH		 853 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
854
2d00f759 855 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 856 return 0;
857}
858
0e9c85a5
DH		 859void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
860{
861 if (waitqueue_active(&vcpu->wq)) {
862 /*
863 * The vcpu gave up the cpu voluntarily, mark it as a good
864 * yield-candidate.
865 */
866 vcpu->preempted = true;
867 wake_up_interruptible(&vcpu->wq);
ce2e4f0b 868 vcpu->stat.halt_wakeup++;
0e9c85a5
DH		 869 }
870}
871
ca872302
CB		 872enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
873{
874 struct kvm_vcpu *vcpu;
2d00f759 875 u64 now, sltime;
ca872302
CB		 876
877 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
2d00f759
DH		 878 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
879 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
ca872302 880
2d00f759
DH		 881 /*
882 * If the monotonic clock runs faster than the tod clock we might be
883 * woken up too early and have to go back to sleep to avoid deadlocks.
884 */
885 if (vcpu->arch.sie_block->ckc > now &&
886 hrtimer_forward_now(timer, ns_to_ktime(sltime)))
887 return HRTIMER_RESTART;
888 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 889 return HRTIMER_NORESTART;
890}
ba5c1e9b 891
2ed10cc1
JF		 892void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
893{
894 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 895
4ae3c081 896 spin_lock(&li->lock);
383d0b05
JF		 897 li->pending_irqs = 0;
898 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
899 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 900 spin_unlock(&li->lock);
4953919f
DH		 901
902 /* clear pending external calls set by sigp interpretation facility */
383d0b05 903 atomic_clear_mask(CPUSTAT_ECALL_PEND, li->cpuflags);
ea5f4969 904 vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl = 0;
2ed10cc1
JF		 905}
906
614aeab4 907int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 908{
180c12fb
CB		 909 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
910 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
911 struct kvm_s390_interrupt_info *n, *inti = NULL;
383d0b05 912 deliver_irq_t func;
ba5c1e9b 913 int deliver;
79395031 914 int rc = 0;
383d0b05
JF		 915 unsigned long irq_type;
916 unsigned long deliverable_irqs;
ba5c1e9b
CO		 917
918 __reset_intercept_indicators(vcpu);
ba5c1e9b 919
383d0b05
JF		 920 /* pending ckc conditions might have been invalidated */
921 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
922 if (kvm_cpu_has_pending_timer(vcpu))
923 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
924
925 do {
926 deliverable_irqs = deliverable_local_irqs(vcpu);
927 /* bits are in the order of interrupt priority */
928 irq_type = find_first_bit(&deliverable_irqs, IRQ_PEND_COUNT);
929 if (irq_type == IRQ_PEND_COUNT)
930 break;
931 func = deliver_irq_funcs[irq_type];
932 if (!func) {
933 WARN_ON_ONCE(func == NULL);
934 clear_bit(irq_type, &li->pending_irqs);
935 continue;
936 }
937 rc = func(vcpu);
938 } while (!rc && irq_type != IRQ_PEND_COUNT);
939
940 set_intercept_indicators_local(vcpu);
ba5c1e9b 941
79395031 942 if (!rc && atomic_read(&fi->active)) {
ba5c1e9b
CO		 943 do {
944 deliver = 0;
b037a4f3 945 spin_lock(&fi->lock);
ba5c1e9b
CO		 946 list_for_each_entry_safe(inti, n, &fi->list, list) {
947 if (__interrupt_is_deliverable(vcpu, inti)) {
948 list_del(&inti->list);
a91b8ebe 949 fi->irq_count--;
ba5c1e9b
CO		 950 deliver = 1;
951 break;
952 }
953 __set_intercept_indicator(vcpu, inti);
954 }
955 if (list_empty(&fi->list))
956 atomic_set(&fi->active, 0);
b037a4f3 957 spin_unlock(&fi->lock);
ba5c1e9b 958 if (deliver) {
383d0b05 959 rc = __deliver_floating_interrupt(vcpu, inti);
ba5c1e9b
CO		 960 kfree(inti);
961 }
79395031 962 } while (!rc && deliver);
ba5c1e9b 963 }
79395031
JF		 964
965 return rc;
ba5c1e9b
CO		 966}
967
383d0b05 968static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 969{
970 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
971
383d0b05 972 li->irq.pgm = irq->u.pgm;
9185124e 973 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 974 return 0;
975}
976
ba5c1e9b
CO		 977int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
978{
180c12fb 979 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 980 struct kvm_s390_irq irq;
ba5c1e9b
CO		 981
982 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
383d0b05
JF		 983 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, code,
984 0, 1);
4ae3c081 985 spin_lock(&li->lock);
383d0b05
JF		 986 irq.u.pgm.code = code;
987 __inject_prog(vcpu, &irq);
d0321a24 988 BUG_ON(waitqueue_active(li->wq));
4ae3c081 989 spin_unlock(&li->lock);
bcd84683
JF		 990 return 0;
991}
992
993int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
994 struct kvm_s390_pgm_info *pgm_info)
995{
996 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 997 struct kvm_s390_irq irq;
0146a7b0 998 int rc;
bcd84683 999
bcd84683
JF		 1000 VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
1001 pgm_info->code);
1002 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1003 pgm_info->code, 0, 1);
4ae3c081 1004 spin_lock(&li->lock);
383d0b05
JF		 1005 irq.u.pgm = *pgm_info;
1006 rc = __inject_prog(vcpu, &irq);
bcd84683 1007 BUG_ON(waitqueue_active(li->wq));
4ae3c081 1008 spin_unlock(&li->lock);
0146a7b0
JF		 1009 return rc;
1010}
1011
383d0b05 1012static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1013{
1014 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1015
383d0b05
JF		 1016 VCPU_EVENT(vcpu, 3, "inject: external irq params:%x, params2:%llx",
1017 irq->u.ext.ext_params, irq->u.ext.ext_params2);
1018 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1019 irq->u.ext.ext_params,
1020 irq->u.ext.ext_params2, 2);
1021
1022 li->irq.ext = irq->u.ext;
1023 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
0146a7b0
JF		 1024 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1025 return 0;
1026}
1027
ea5f4969
DH		 1028static int __inject_extcall_sigpif(struct kvm_vcpu *vcpu, uint16_t src_id)
1029{
1030 unsigned char new_val, old_val;
1031 uint8_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
1032
1033 new_val = SIGP_CTRL_C | (src_id & SIGP_CTRL_SCN_MASK);
1034 old_val = *sigp_ctrl & ~SIGP_CTRL_C;
1035 if (cmpxchg(sigp_ctrl, old_val, new_val) != old_val) {
1036 /* another external call is pending */
1037 return -EBUSY;
1038 }
1039 atomic_set_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
1040 return 0;
1041}
1042
0675d92d 1043static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1044{
1045 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1046 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1047 uint16_t src_id = irq->u.extcall.code;
0146a7b0
JF		 1048
1049 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
ea5f4969 1050 src_id);
383d0b05 1051 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ea5f4969
DH		 1052 src_id, 0, 2);
1053
1054 /* sending vcpu invalid */
1055 if (src_id >= KVM_MAX_VCPUS ||
1056 kvm_get_vcpu(vcpu->kvm, src_id) == NULL)
1057 return -EINVAL;
1058
1059 if (sclp_has_sigpif())
1060 return __inject_extcall_sigpif(vcpu, src_id);
383d0b05 1061
ea5f4969
DH		 1062 if (!test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
1063 return -EBUSY;
383d0b05 1064 *extcall = irq->u.extcall;
0146a7b0
JF		 1065 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1066 return 0;
1067}
1068
383d0b05 1069static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1070{
1071 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1072 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0
JF		 1073
1074 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
556cc0da 1075 irq->u.prefix.address);
383d0b05 1076 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
556cc0da 1077 irq->u.prefix.address, 0, 2);
383d0b05 1078
a3a9c59a
DH		 1079 if (!is_vcpu_stopped(vcpu))
1080 return -EBUSY;
1081
383d0b05
JF		 1082 *prefix = irq->u.prefix;
1083 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1084 return 0;
1085}
1086
6cddd432 1087#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1088static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1089{
1090 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1091 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1092 int rc = 0;
0146a7b0 1093
383d0b05
JF		 1094 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0, 2);
1095
2822545f
DH		 1096 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1097 return -EINVAL;
1098
6cddd432
DH		 1099 if (is_vcpu_stopped(vcpu)) {
1100 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1101 rc = kvm_s390_store_status_unloaded(vcpu,
1102 KVM_S390_STORE_STATUS_NOADDR);
1103 return rc;
1104 }
1105
1106 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1107 return -EBUSY;
2822545f 1108 stop->flags = irq->u.stop.flags;
6cddd432 1109 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1110 return 0;
1111}
1112
1113static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1114 struct kvm_s390_irq *irq)
0146a7b0
JF		 1115{
1116 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1117
383d0b05
JF		 1118 VCPU_EVENT(vcpu, 3, "inject: restart type %llx", irq->type);
1119 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0, 2);
1120
1121 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1122 return 0;
1123}
1124
1125static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1126 struct kvm_s390_irq *irq)
0146a7b0
JF		 1127{
1128 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1129
383d0b05
JF		 1130 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n",
1131 irq->u.emerg.code);
1132 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
49538d12 1133 irq->u.emerg.code, 0, 2);
383d0b05 1134
49538d12 1135 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1136 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
0146a7b0
JF		 1137 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1138 return 0;
1139}
1140
383d0b05 1141static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1142{
1143 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1144 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0
JF		 1145
1146 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
556cc0da 1147 irq->u.mchk.mcic);
383d0b05 1148 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
556cc0da 1149 irq->u.mchk.mcic, 2);
383d0b05
JF		 1150
1151 /*
fc2020cf
JF		 1152 * Because repressible machine checks can be indicated along with
1153 * exigent machine checks (PoP, Chapter 11, Interruption action)
1154 * we need to combine cr14, mcic and external damage code.
1155 * Failing storage address and the logout area should not be or'ed
1156 * together, we just indicate the last occurrence of the corresponding
1157 * machine check
383d0b05 1158 */
fc2020cf 1159 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1160 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1161 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1162 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1163 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1164 sizeof(mchk->fixed_logout));
383d0b05
JF		 1165 if (mchk->mcic & MCHK_EX_MASK)
1166 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1167 else if (mchk->mcic & MCHK_REP_MASK)
1168 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1169 return 0;
1170}
1171
383d0b05 1172static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1173{
1174 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1175
383d0b05
JF		 1176 VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CLOCK_COMP);
1177 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
1178 0, 0, 2);
1179
1180 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
0146a7b0
JF		 1181 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1182 return 0;
1183}
1184
383d0b05 1185static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1186{
1187 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1188
383d0b05
JF		 1189 VCPU_EVENT(vcpu, 3, "inject: type %x", KVM_S390_INT_CPU_TIMER);
1190 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
1191 0, 0, 2);
1192
1193 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
0146a7b0 1194 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
ba5c1e9b
CO		 1195 return 0;
1196}
1197
383d0b05 1198
fa6b7fe9
CH		 1199struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
1200 u64 cr6, u64 schid)
1201{
1202 struct kvm_s390_float_interrupt *fi;
1203 struct kvm_s390_interrupt_info *inti, *iter;
1204
1205 if ((!schid && !cr6) || (schid && cr6))
1206 return NULL;
fa6b7fe9
CH		 1207 fi = &kvm->arch.float_int;
1208 spin_lock(&fi->lock);
1209 inti = NULL;
1210 list_for_each_entry(iter, &fi->list, list) {
1211 if (!is_ioint(iter->type))
1212 continue;
79fd50c6
CH		 1213 if (cr6 &&
1214 ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
fa6b7fe9
CH		 1215 continue;
1216 if (schid) {
1217 if (((schid & 0x00000000ffff0000) >> 16) !=
1218 iter->io.subchannel_id)
1219 continue;
1220 if ((schid & 0x000000000000ffff) !=
1221 iter->io.subchannel_nr)
1222 continue;
1223 }
1224 inti = iter;
1225 break;
1226 }
a91b8ebe 1227 if (inti) {
fa6b7fe9 1228 list_del_init(&inti->list);
a91b8ebe
JF		 1229 fi->irq_count--;
1230 }
fa6b7fe9
CH		 1231 if (list_empty(&fi->list))
1232 atomic_set(&fi->active, 0);
1233 spin_unlock(&fi->lock);
fa6b7fe9
CH		 1234 return inti;
1235}
ba5c1e9b 1236
a91b8ebe 1237static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
ba5c1e9b 1238{
180c12fb
CB		 1239 struct kvm_s390_local_interrupt *li;
1240 struct kvm_s390_float_interrupt *fi;
c05c4186 1241 struct kvm_s390_interrupt_info *iter;
1ee0bc55 1242 struct kvm_vcpu *dst_vcpu = NULL;
ba5c1e9b 1243 int sigcpu;
a91b8ebe 1244 int rc = 0;
ba5c1e9b 1245
c05c4186
JF		 1246 fi = &kvm->arch.float_int;
1247 spin_lock(&fi->lock);
a91b8ebe
JF		 1248 if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
1249 rc = -EINVAL;
1250 goto unlock_fi;
1251 }
1252 fi->irq_count++;
c05c4186
JF		 1253 if (!is_ioint(inti->type)) {
1254 list_add_tail(&inti->list, &fi->list);
1255 } else {
1256 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
1257
1258 /* Keep I/O interrupts sorted in isc order. */
1259 list_for_each_entry(iter, &fi->list, list) {
1260 if (!is_ioint(iter->type))
1261 continue;
1262 if (int_word_to_isc_bits(iter->io.io_int_word)
1263 <= isc_bits)
1264 continue;
1265 break;
1266 }
1267 list_add_tail(&inti->list, &iter->list);
1268 }
1269 atomic_set(&fi->active, 1);
8e2207cd
DH		 1270 if (atomic_read(&kvm->online_vcpus) == 0)
1271 goto unlock_fi;
c05c4186
JF		 1272 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
1273 if (sigcpu == KVM_MAX_VCPUS) {
1274 do {
1275 sigcpu = fi->next_rr_cpu++;
1276 if (sigcpu == KVM_MAX_VCPUS)
1277 sigcpu = fi->next_rr_cpu = 0;
1ee0bc55 1278 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
c05c4186 1279 }
1ee0bc55
JF		 1280 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1281 li = &dst_vcpu->arch.local_int;
4ae3c081 1282 spin_lock(&li->lock);
da00fcbd
CB		 1283 switch (inti->type) {
1284 case KVM_S390_MCHK:
1285 atomic_set_mask(CPUSTAT_STOP_INT, li->cpuflags);
1286 break;
1287 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1288 atomic_set_mask(CPUSTAT_IO_INT, li->cpuflags);
1289 break;
1290 default:
1291 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1292 break;
1293 }
4ae3c081 1294 spin_unlock(&li->lock);
0e9c85a5 1295 kvm_s390_vcpu_wakeup(kvm_get_vcpu(kvm, sigcpu));
a91b8ebe 1296unlock_fi:
c05c4186 1297 spin_unlock(&fi->lock);
a91b8ebe 1298 return rc;
c05c4186
JF		 1299}
1300
1301int kvm_s390_inject_vm(struct kvm *kvm,
1302 struct kvm_s390_interrupt *s390int)
1303{
1304 struct kvm_s390_interrupt_info *inti;
428d53be 1305 int rc;
c05c4186 1306
ba5c1e9b
CO		 1307 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1308 if (!inti)
1309 return -ENOMEM;
1310
c05c4186
JF		 1311 inti->type = s390int->type;
1312 switch (inti->type) {
ba5c1e9b 1313 case KVM_S390_INT_VIRTIO:
33e19115 1314 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1315 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1316 inti->ext.ext_params = s390int->parm;
1317 inti->ext.ext_params2 = s390int->parm64;
1318 break;
1319 case KVM_S390_INT_SERVICE:
1320 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1321 inti->ext.ext_params = s390int->parm;
1322 break;
3c038e6b 1323 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 1324 inti->ext.ext_params2 = s390int->parm64;
1325 break;
48a3e950
CH		 1326 case KVM_S390_MCHK:
1327 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
1328 s390int->parm64);
48a3e950
CH		 1329 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1330 inti->mchk.mcic = s390int->parm64;
1331 break;
d8346b7d 1332 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
c05c4186 1333 if (inti->type & IOINT_AI_MASK)
d8346b7d
CH		 1334 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
1335 else
1336 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
1337 s390int->type & IOINT_CSSID_MASK,
1338 s390int->type & IOINT_SSID_MASK,
1339 s390int->type & IOINT_SCHID_MASK);
d8346b7d
CH		 1340 inti->io.subchannel_id = s390int->parm >> 16;
1341 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1342 inti->io.io_int_parm = s390int->parm64 >> 32;
1343 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1344 break;
ba5c1e9b
CO		 1345 default:
1346 kfree(inti);
1347 return -EINVAL;
1348 }
ade38c31
CH		 1349 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1350 2);
ba5c1e9b 1351
428d53be
DH		 1352 rc = __inject_vm(kvm, inti);
1353 if (rc)
1354 kfree(inti);
1355 return rc;
ba5c1e9b
CO		 1356}
1357
15462e37 1358int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 1359 struct kvm_s390_interrupt_info *inti)
1360{
15462e37 1361 return __inject_vm(kvm, inti);
2f32d4ea
CH		 1362}
1363
383d0b05
JF		 1364int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1365 struct kvm_s390_irq *irq)
1366{
1367 irq->type = s390int->type;
1368 switch (irq->type) {
1369 case KVM_S390_PROGRAM_INT:
1370 if (s390int->parm & 0xffff0000)
1371 return -EINVAL;
1372 irq->u.pgm.code = s390int->parm;
1373 break;
1374 case KVM_S390_SIGP_SET_PREFIX:
1375 irq->u.prefix.address = s390int->parm;
1376 break;
2822545f
DH		 1377 case KVM_S390_SIGP_STOP:
1378 irq->u.stop.flags = s390int->parm;
1379 break;
383d0b05 1380 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 1381 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1382 return -EINVAL;
1383 irq->u.extcall.code = s390int->parm;
1384 break;
1385 case KVM_S390_INT_EMERGENCY:
94d1f564 1386 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1387 return -EINVAL;
1388 irq->u.emerg.code = s390int->parm;
1389 break;
1390 case KVM_S390_MCHK:
1391 irq->u.mchk.mcic = s390int->parm64;
1392 break;
1393 }
1394 return 0;
1395}
1396
6cddd432
DH		 1397int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1398{
1399 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1400
1401 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1402}
1403
1404void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1405{
1406 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1407
1408 spin_lock(&li->lock);
1409 li->irq.stop.flags = 0;
1410 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1411 spin_unlock(&li->lock);
1412}
1413
383d0b05 1414int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 1415{
0146a7b0 1416 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0146a7b0 1417 int rc;
ba5c1e9b 1418
0146a7b0 1419 spin_lock(&li->lock);
383d0b05 1420 switch (irq->type) {
ba5c1e9b 1421 case KVM_S390_PROGRAM_INT:
ba5c1e9b 1422 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
383d0b05
JF		 1423 irq->u.pgm.code);
1424 rc = __inject_prog(vcpu, irq);
ba5c1e9b 1425 break;
b7e6e4d3 1426 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 1427 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 1428 break;
ba5c1e9b 1429 case KVM_S390_SIGP_STOP:
383d0b05 1430 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 1431 break;
ba5c1e9b 1432 case KVM_S390_RESTART:
383d0b05 1433 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 1434 break;
e029ae5b 1435 case KVM_S390_INT_CLOCK_COMP:
383d0b05 1436 rc = __inject_ckc(vcpu);
0146a7b0 1437 break;
e029ae5b 1438 case KVM_S390_INT_CPU_TIMER:
383d0b05 1439 rc = __inject_cpu_timer(vcpu);
82a12737 1440 break;
7697e71f 1441 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 1442 rc = __inject_extcall(vcpu, irq);
82a12737 1443 break;
ba5c1e9b 1444 case KVM_S390_INT_EMERGENCY:
383d0b05 1445 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 1446 break;
48a3e950 1447 case KVM_S390_MCHK:
383d0b05 1448 rc = __inject_mchk(vcpu, irq);
48a3e950 1449 break;
3c038e6b 1450 case KVM_S390_INT_PFAULT_INIT:
383d0b05 1451 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 1452 break;
ba5c1e9b
CO		 1453 case KVM_S390_INT_VIRTIO:
1454 case KVM_S390_INT_SERVICE:
d8346b7d 1455 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 1456 default:
0146a7b0 1457 rc = -EINVAL;
ba5c1e9b 1458 }
4ae3c081 1459 spin_unlock(&li->lock);
0146a7b0
JF		 1460 if (!rc)
1461 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 1462 return rc;
ba5c1e9b 1463}
c05c4186 1464
67335e63 1465void kvm_s390_clear_float_irqs(struct kvm *kvm)
c05c4186
JF		 1466{
1467 struct kvm_s390_float_interrupt *fi;
1468 struct kvm_s390_interrupt_info *n, *inti = NULL;
1469
c05c4186
JF		 1470 fi = &kvm->arch.float_int;
1471 spin_lock(&fi->lock);
1472 list_for_each_entry_safe(inti, n, &fi->list, list) {
1473 list_del(&inti->list);
1474 kfree(inti);
1475 }
a91b8ebe 1476 fi->irq_count = 0;
c05c4186
JF		 1477 atomic_set(&fi->active, 0);
1478 spin_unlock(&fi->lock);
c05c4186
JF		 1479}
1480
94aa033e
JF		 1481static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
1482 struct kvm_s390_irq *irq)
c05c4186 1483{
94aa033e 1484 irq->type = inti->type;
c05c4186 1485 switch (inti->type) {
3c038e6b
DD		 1486 case KVM_S390_INT_PFAULT_INIT:
1487 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1488 case KVM_S390_INT_VIRTIO:
1489 case KVM_S390_INT_SERVICE:
94aa033e 1490 irq->u.ext = inti->ext;
c05c4186
JF		 1491 break;
1492 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 1493 irq->u.io = inti->io;
c05c4186
JF		 1494 break;
1495 case KVM_S390_MCHK:
94aa033e 1496 irq->u.mchk = inti->mchk;
c05c4186 1497 break;
c05c4186 1498 }
c05c4186
JF		 1499}
1500
94aa033e 1501static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186
JF		 1502{
1503 struct kvm_s390_interrupt_info *inti;
1504 struct kvm_s390_float_interrupt *fi;
94aa033e
JF		 1505 struct kvm_s390_irq *buf;
1506 int max_irqs;
c05c4186
JF		 1507 int ret = 0;
1508 int n = 0;
1509
94aa033e
JF		 1510 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
1511 return -EINVAL;
1512
1513 /*
1514 * We are already using -ENOMEM to signal
1515 * userspace it may retry with a bigger buffer,
1516 * so we need to use something else for this case
1517 */
1518 buf = vzalloc(len);
1519 if (!buf)
1520 return -ENOBUFS;
1521
1522 max_irqs = len / sizeof(struct kvm_s390_irq);
1523
c05c4186
JF		 1524 fi = &kvm->arch.float_int;
1525 spin_lock(&fi->lock);
c05c4186 1526 list_for_each_entry(inti, &fi->list, list) {
94aa033e 1527 if (n == max_irqs) {
c05c4186
JF		 1528 /* signal userspace to try again */
1529 ret = -ENOMEM;
1530 break;
1531 }
94aa033e 1532 inti_to_irq(inti, &buf[n]);
c05c4186
JF		 1533 n++;
1534 }
c05c4186 1535 spin_unlock(&fi->lock);
94aa033e
JF		 1536 if (!ret && n > 0) {
1537 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
1538 ret = -EFAULT;
1539 }
1540 vfree(buf);
c05c4186
JF		 1541
1542 return ret < 0 ? ret : n;
1543}
1544
1545static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1546{
1547 int r;
1548
1549 switch (attr->group) {
1550 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 1551 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 1552 attr->attr);
1553 break;
1554 default:
1555 r = -EINVAL;
1556 }
1557
1558 return r;
1559}
1560
1561static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1562 u64 addr)
1563{
1564 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1565 void *target = NULL;
1566 void __user *source;
1567 u64 size;
1568
1569 if (get_user(inti->type, (u64 __user *)addr))
1570 return -EFAULT;
1571
1572 switch (inti->type) {
3c038e6b
DD		 1573 case KVM_S390_INT_PFAULT_INIT:
1574 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1575 case KVM_S390_INT_VIRTIO:
1576 case KVM_S390_INT_SERVICE:
1577 target = (void *) &inti->ext;
1578 source = &uptr->u.ext;
1579 size = sizeof(inti->ext);
1580 break;
1581 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1582 target = (void *) &inti->io;
1583 source = &uptr->u.io;
1584 size = sizeof(inti->io);
1585 break;
1586 case KVM_S390_MCHK:
1587 target = (void *) &inti->mchk;
1588 source = &uptr->u.mchk;
1589 size = sizeof(inti->mchk);
1590 break;
1591 default:
1592 return -EINVAL;
1593 }
1594
1595 if (copy_from_user(target, source, size))
1596 return -EFAULT;
1597
1598 return 0;
1599}
1600
1601static int enqueue_floating_irq(struct kvm_device *dev,
1602 struct kvm_device_attr *attr)
1603{
1604 struct kvm_s390_interrupt_info *inti = NULL;
1605 int r = 0;
1606 int len = attr->attr;
1607
1608 if (len % sizeof(struct kvm_s390_irq) != 0)
1609 return -EINVAL;
1610 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1611 return -EINVAL;
1612
1613 while (len >= sizeof(struct kvm_s390_irq)) {
1614 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1615 if (!inti)
1616 return -ENOMEM;
1617
1618 r = copy_irq_from_user(inti, attr->addr);
1619 if (r) {
1620 kfree(inti);
1621 return r;
1622 }
a91b8ebe
JF		 1623 r = __inject_vm(dev->kvm, inti);
1624 if (r) {
1625 kfree(inti);
1626 return r;
1627 }
c05c4186
JF		 1628 len -= sizeof(struct kvm_s390_irq);
1629 attr->addr += sizeof(struct kvm_s390_irq);
1630 }
1631
1632 return r;
1633}
1634
841b91c5
CH		 1635static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1636{
1637 if (id >= MAX_S390_IO_ADAPTERS)
1638 return NULL;
1639 return kvm->arch.adapters[id];
1640}
1641
1642static int register_io_adapter(struct kvm_device *dev,
1643 struct kvm_device_attr *attr)
1644{
1645 struct s390_io_adapter *adapter;
1646 struct kvm_s390_io_adapter adapter_info;
1647
1648 if (copy_from_user(&adapter_info,
1649 (void __user *)attr->addr, sizeof(adapter_info)))
1650 return -EFAULT;
1651
1652 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1653 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1654 return -EINVAL;
1655
1656 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1657 if (!adapter)
1658 return -ENOMEM;
1659
1660 INIT_LIST_HEAD(&adapter->maps);
1661 init_rwsem(&adapter->maps_lock);
1662 atomic_set(&adapter->nr_maps, 0);
1663 adapter->id = adapter_info.id;
1664 adapter->isc = adapter_info.isc;
1665 adapter->maskable = adapter_info.maskable;
1666 adapter->masked = false;
1667 adapter->swap = adapter_info.swap;
1668 dev->kvm->arch.adapters[adapter->id] = adapter;
1669
1670 return 0;
1671}
1672
1673int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1674{
1675 int ret;
1676 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1677
1678 if (!adapter || !adapter->maskable)
1679 return -EINVAL;
1680 ret = adapter->masked;
1681 adapter->masked = masked;
1682 return ret;
1683}
1684
1685static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1686{
1687 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1688 struct s390_map_info *map;
1689 int ret;
1690
1691 if (!adapter || !addr)
1692 return -EINVAL;
1693
1694 map = kzalloc(sizeof(*map), GFP_KERNEL);
1695 if (!map) {
1696 ret = -ENOMEM;
1697 goto out;
1698 }
1699 INIT_LIST_HEAD(&map->list);
1700 map->guest_addr = addr;
6e0a0431 1701 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 1702 if (map->addr == -EFAULT) {
1703 ret = -EFAULT;
1704 goto out;
1705 }
1706 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1707 if (ret < 0)
1708 goto out;
1709 BUG_ON(ret != 1);
1710 down_write(&adapter->maps_lock);
1711 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1712 list_add_tail(&map->list, &adapter->maps);
1713 ret = 0;
1714 } else {
1715 put_page(map->page);
1716 ret = -EINVAL;
1717 }
1718 up_write(&adapter->maps_lock);
1719out:
1720 if (ret)
1721 kfree(map);
1722 return ret;
1723}
1724
1725static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1726{
1727 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1728 struct s390_map_info *map, *tmp;
1729 int found = 0;
1730
1731 if (!adapter || !addr)
1732 return -EINVAL;
1733
1734 down_write(&adapter->maps_lock);
1735 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1736 if (map->guest_addr == addr) {
1737 found = 1;
1738 atomic_dec(&adapter->nr_maps);
1739 list_del(&map->list);
1740 put_page(map->page);
1741 kfree(map);
1742 break;
1743 }
1744 }
1745 up_write(&adapter->maps_lock);
1746
1747 return found ? 0 : -EINVAL;
1748}
1749
1750void kvm_s390_destroy_adapters(struct kvm *kvm)
1751{
1752 int i;
1753 struct s390_map_info *map, *tmp;
1754
1755 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1756 if (!kvm->arch.adapters[i])
1757 continue;
1758 list_for_each_entry_safe(map, tmp,
1759 &kvm->arch.adapters[i]->maps, list) {
1760 list_del(&map->list);
1761 put_page(map->page);
1762 kfree(map);
1763 }
1764 kfree(kvm->arch.adapters[i]);
1765 }
1766}
1767
1768static int modify_io_adapter(struct kvm_device *dev,
1769 struct kvm_device_attr *attr)
1770{
1771 struct kvm_s390_io_adapter_req req;
1772 struct s390_io_adapter *adapter;
1773 int ret;
1774
1775 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1776 return -EFAULT;
1777
1778 adapter = get_io_adapter(dev->kvm, req.id);
1779 if (!adapter)
1780 return -EINVAL;
1781 switch (req.type) {
1782 case KVM_S390_IO_ADAPTER_MASK:
1783 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1784 if (ret > 0)
1785 ret = 0;
1786 break;
1787 case KVM_S390_IO_ADAPTER_MAP:
1788 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1789 break;
1790 case KVM_S390_IO_ADAPTER_UNMAP:
1791 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1792 break;
1793 default:
1794 ret = -EINVAL;
1795 }
1796
1797 return ret;
1798}
1799
c05c4186
JF		 1800static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1801{
1802 int r = 0;
3c038e6b
DD		 1803 unsigned int i;
1804 struct kvm_vcpu *vcpu;
c05c4186
JF		 1805
1806 switch (attr->group) {
1807 case KVM_DEV_FLIC_ENQUEUE:
1808 r = enqueue_floating_irq(dev, attr);
1809 break;
1810 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 1811 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 1812 break;
3c038e6b
DD		 1813 case KVM_DEV_FLIC_APF_ENABLE:
1814 dev->kvm->arch.gmap->pfault_enabled = 1;
1815 break;
1816 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1817 dev->kvm->arch.gmap->pfault_enabled = 0;
1818 /*
1819 * Make sure no async faults are in transition when
1820 * clearing the queues. So we don't need to worry
1821 * about late coming workers.
1822 */
1823 synchronize_srcu(&dev->kvm->srcu);
1824 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1825 kvm_clear_async_pf_completion_queue(vcpu);
1826 break;
841b91c5
CH		 1827 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1828 r = register_io_adapter(dev, attr);
1829 break;
1830 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1831 r = modify_io_adapter(dev, attr);
1832 break;
c05c4186
JF		 1833 default:
1834 r = -EINVAL;
1835 }
1836
1837 return r;
1838}
1839
1840static int flic_create(struct kvm_device *dev, u32 type)
1841{
1842 if (!dev)
1843 return -EINVAL;
1844 if (dev->kvm->arch.flic)
1845 return -EINVAL;
1846 dev->kvm->arch.flic = dev;
1847 return 0;
1848}
1849
1850static void flic_destroy(struct kvm_device *dev)
1851{
1852 dev->kvm->arch.flic = NULL;
1853 kfree(dev);
1854}
1855
1856/* s390 floating irq controller (flic) */
1857struct kvm_device_ops kvm_flic_ops = {
1858 .name = "kvm-flic",
1859 .get_attr = flic_get_attr,
1860 .set_attr = flic_set_attr,
1861 .create = flic_create,
1862 .destroy = flic_destroy,
1863};
84223598
CH		 1864
1865static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
1866{
1867 unsigned long bit;
1868
1869 bit = bit_nr + (addr % PAGE_SIZE) * 8;
1870
1871 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
1872}
1873
1874static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
1875 u64 addr)
1876{
1877 struct s390_map_info *map;
1878
1879 if (!adapter)
1880 return NULL;
1881
1882 list_for_each_entry(map, &adapter->maps, list) {
1883 if (map->guest_addr == addr)
1884 return map;
1885 }
1886 return NULL;
1887}
1888
1889static int adapter_indicators_set(struct kvm *kvm,
1890 struct s390_io_adapter *adapter,
1891 struct kvm_s390_adapter_int *adapter_int)
1892{
1893 unsigned long bit;
1894 int summary_set, idx;
1895 struct s390_map_info *info;
1896 void *map;
1897
1898 info = get_map_info(adapter, adapter_int->ind_addr);
1899 if (!info)
1900 return -1;
1901 map = page_address(info->page);
1902 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
1903 set_bit(bit, map);
1904 idx = srcu_read_lock(&kvm->srcu);
1905 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1906 set_page_dirty_lock(info->page);
1907 info = get_map_info(adapter, adapter_int->summary_addr);
1908 if (!info) {
1909 srcu_read_unlock(&kvm->srcu, idx);
1910 return -1;
1911 }
1912 map = page_address(info->page);
1913 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
1914 adapter->swap);
1915 summary_set = test_and_set_bit(bit, map);
1916 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1917 set_page_dirty_lock(info->page);
1918 srcu_read_unlock(&kvm->srcu, idx);
1919 return summary_set ? 0 : 1;
1920}
1921
1922/*
1923 * < 0 - not injected due to error
1924 * = 0 - coalesced, summary indicator already active
1925 * > 0 - injected interrupt
1926 */
1927static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
1928 struct kvm *kvm, int irq_source_id, int level,
1929 bool line_status)
1930{
1931 int ret;
1932 struct s390_io_adapter *adapter;
1933
1934 /* We're only interested in the 0->1 transition. */
1935 if (!level)
1936 return 0;
1937 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
1938 if (!adapter)
1939 return -1;
1940 down_read(&adapter->maps_lock);
1941 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
1942 up_read(&adapter->maps_lock);
1943 if ((ret > 0) && !adapter->masked) {
1944 struct kvm_s390_interrupt s390int = {
1945 .type = KVM_S390_INT_IO(1, 0, 0, 0),
1946 .parm = 0,
1947 .parm64 = (adapter->isc << 27) | 0x80000000,
1948 };
1949 ret = kvm_s390_inject_vm(kvm, &s390int);
1950 if (ret == 0)
1951 ret = 1;
1952 }
1953 return ret;
1954}
1955
8ba918d4 1956int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 1957 const struct kvm_irq_routing_entry *ue)
1958{
1959 int ret;
1960
1961 switch (ue->type) {
1962 case KVM_IRQ_ROUTING_S390_ADAPTER:
1963 e->set = set_adapter_int;
1964 e->adapter.summary_addr = ue->u.adapter.summary_addr;
1965 e->adapter.ind_addr = ue->u.adapter.ind_addr;
1966 e->adapter.summary_offset = ue->u.adapter.summary_offset;
1967 e->adapter.ind_offset = ue->u.adapter.ind_offset;
1968 e->adapter.adapter_id = ue->u.adapter.adapter_id;
1969 ret = 0;
1970 break;
1971 default:
1972 ret = -EINVAL;
1973 }
1974
1975 return ret;
1976}
1977
1978int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
1979 int irq_source_id, int level, bool line_status)
1980{
1981 return -EINVAL;
1982}
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