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KVM: s390: Make provisions for ESCA utilization
[deliverable/linux.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>
6d3da241 25#include <asm/isc.h>
ba5c1e9b
CO		 26#include "kvm-s390.h"
27#include "gaccess.h"
ade38c31 28#include "trace-s390.h"
ba5c1e9b 29
d8346b7d
CH		 30#define IOINT_SCHID_MASK 0x0000ffff
31#define IOINT_SSID_MASK 0x00030000
32#define IOINT_CSSID_MASK 0x03fc0000
44c6ca3d 33#define PFAULT_INIT 0x0600
60f90a14
JF		 34#define PFAULT_DONE 0x0680
35#define VIRTIO_PARAM 0x0d00
d8346b7d 36
a5bd7647
ED		 37/* handle external calls via sigp interpretation facility */
38static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id)
39{
7d43bafc
ED		 40 int c, scn;
41
42 if (vcpu->kvm->arch.use_esca) {
43 struct esca_block *sca = vcpu->kvm->arch.sca;
44 union esca_sigp_ctrl sigp_ctrl =
45 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
46
47 c = sigp_ctrl.c;
48 scn = sigp_ctrl.scn;
49 } else {
50 struct bsca_block *sca = vcpu->kvm->arch.sca;
51 union bsca_sigp_ctrl sigp_ctrl =
52 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
53
54 c = sigp_ctrl.c;
55 scn = sigp_ctrl.scn;
56 }
a5bd7647
ED		 57
58 if (src_id)
7d43bafc 59 *src_id = scn;
a5bd7647 60
7d43bafc 61 return c && atomic_read(&vcpu->arch.sie_block->cpuflags) &
a5bd7647
ED		 62 CPUSTAT_ECALL_PEND;
63}
64
65static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id)
66{
bc784cce 67 int expect, rc;
a5bd7647 68
7d43bafc
ED		 69 if (vcpu->kvm->arch.use_esca) {
70 struct esca_block *sca = vcpu->kvm->arch.sca;
71 union esca_sigp_ctrl *sigp_ctrl =
72 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
73 union esca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
74
75 new_val.scn = src_id;
76 new_val.c = 1;
77 old_val.c = 0;
78
79 expect = old_val.value;
80 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
81 } else {
82 struct bsca_block *sca = vcpu->kvm->arch.sca;
83 union bsca_sigp_ctrl *sigp_ctrl =
84 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
85 union bsca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
bc784cce 86
7d43bafc
ED		 87 new_val.scn = src_id;
88 new_val.c = 1;
89 old_val.c = 0;
90
91 expect = old_val.value;
92 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
93 }
bc784cce
ED		 94
95 if (rc != expect) {
a5bd7647
ED		 96 /* another external call is pending */
97 return -EBUSY;
98 }
99 atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
100 return 0;
101}
102
103static void sca_clear_ext_call(struct kvm_vcpu *vcpu)
104{
a5bd7647 105 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
7d43bafc 106 int rc, expect;
a5bd7647
ED		 107
108 atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags);
7d43bafc
ED		 109 if (vcpu->kvm->arch.use_esca) {
110 struct esca_block *sca = vcpu->kvm->arch.sca;
111 union esca_sigp_ctrl *sigp_ctrl =
112 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
113 union esca_sigp_ctrl old = *sigp_ctrl;
114
115 expect = old.value;
116 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
117 } else {
118 struct bsca_block *sca = vcpu->kvm->arch.sca;
119 union bsca_sigp_ctrl *sigp_ctrl =
120 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
121 union bsca_sigp_ctrl old = *sigp_ctrl;
122
123 expect = old.value;
124 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
125 }
126 WARN_ON(rc != expect); /* cannot clear? */
a5bd7647
ED		 127}
128
3c038e6b 129int psw_extint_disabled(struct kvm_vcpu *vcpu)
ba5c1e9b
CO		 130{
131 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
132}
133
d8346b7d
CH		 134static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
135{
136 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
137}
138
48a3e950
CH		 139static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
140{
141 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
142}
143
ba5c1e9b
CO		 144static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
145{
fee0e0fd
DH		 146 return psw_extint_disabled(vcpu) &&
147 psw_ioint_disabled(vcpu) &&
148 psw_mchk_disabled(vcpu);
ba5c1e9b
CO		 149}
150
bb78c5ec
DH		 151static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
152{
153 if (psw_extint_disabled(vcpu) ||
154 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
155 return 0;
f71d0dc5
DH		 156 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
157 /* No timer interrupts when single stepping */
158 return 0;
bb78c5ec
DH		 159 return 1;
160}
161
b4aec925
DH		 162static int ckc_irq_pending(struct kvm_vcpu *vcpu)
163{
60417fcc 164 if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm))
b4aec925
DH		 165 return 0;
166 return ckc_interrupts_enabled(vcpu);
167}
168
169static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
170{
171 return !psw_extint_disabled(vcpu) &&
172 (vcpu->arch.sie_block->gcr[0] & 0x400ul);
173}
174
175static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
176{
177 return (vcpu->arch.sie_block->cputm >> 63) &&
178 cpu_timer_interrupts_enabled(vcpu);
179}
180
6d3da241 181static inline int is_ioirq(unsigned long irq_type)
79fd50c6 182{
6d3da241
JF		 183 return ((irq_type >= IRQ_PEND_IO_ISC_0) &&
184 (irq_type <= IRQ_PEND_IO_ISC_7));
185}
79fd50c6 186
6d3da241
JF		 187static uint64_t isc_to_isc_bits(int isc)
188{
79fd50c6
CH		 189 return (0x80 >> isc) << 24;
190}
191
6d3da241 192static inline u8 int_word_to_isc(u32 int_word)
ba5c1e9b 193{
6d3da241
JF		 194 return (int_word & 0x38000000) >> 27;
195}
196
5f94c58e 197static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
6d3da241 198{
5f94c58e
DH		 199 return vcpu->kvm->arch.float_int.pending_irqs |
200 vcpu->arch.local_int.pending_irqs;
383d0b05
JF		 201}
202
6d3da241
JF		 203static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
204 unsigned long active_mask)
205{
206 int i;
207
208 for (i = 0; i <= MAX_ISC; i++)
209 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
210 active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i));
211
212 return active_mask;
213}
214
215static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
383d0b05 216{
6d3da241
JF		 217 unsigned long active_mask;
218
5f94c58e 219 active_mask = pending_irqs(vcpu);
ffeca0ae
JF		 220 if (!active_mask)
221 return 0;
383d0b05
JF		 222
223 if (psw_extint_disabled(vcpu))
224 active_mask &= ~IRQ_PEND_EXT_MASK;
6d3da241
JF		 225 if (psw_ioint_disabled(vcpu))
226 active_mask &= ~IRQ_PEND_IO_MASK;
227 else
228 active_mask = disable_iscs(vcpu, active_mask);
383d0b05
JF		 229 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
230 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
231 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
232 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
233 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
234 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
235 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
236 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
6d3da241
JF		 237 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
238 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
383d0b05
JF		 239 if (psw_mchk_disabled(vcpu))
240 active_mask &= ~IRQ_PEND_MCHK_MASK;
6d3da241
JF		 241 if (!(vcpu->arch.sie_block->gcr[14] &
242 vcpu->kvm->arch.float_int.mchk.cr14))
243 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
383d0b05 244
6cddd432
DH		 245 /*
246 * STOP irqs will never be actively delivered. They are triggered via
247 * intercept requests and cleared when the stop intercept is performed.
248 */
249 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
250
383d0b05
JF		 251 return active_mask;
252}
253
ba5c1e9b
CO		 254static void __set_cpu_idle(struct kvm_vcpu *vcpu)
255{
805de8f4 256 atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 257 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
258}
259
260static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
261{
805de8f4 262 atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 263 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
264}
265
266static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
267{
805de8f4
PZ		 268 atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
269 &vcpu->arch.sie_block->cpuflags);
ba5c1e9b 270 vcpu->arch.sie_block->lctl = 0x0000;
27291e21
DH		 271 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
272
273 if (guestdbg_enabled(vcpu)) {
274 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
275 LCTL_CR10 | LCTL_CR11);
276 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
277 }
ba5c1e9b
CO		 278}
279
280static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
281{
805de8f4 282 atomic_or(flag, &vcpu->arch.sie_block->cpuflags);
ba5c1e9b
CO		 283}
284
6d3da241
JF		 285static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
286{
5f94c58e 287 if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK))
6d3da241
JF		 288 return;
289 else if (psw_ioint_disabled(vcpu))
290 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
291 else
292 vcpu->arch.sie_block->lctl |= LCTL_CR6;
293}
294
383d0b05
JF		 295static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
296{
5f94c58e 297 if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
383d0b05
JF		 298 return;
299 if (psw_extint_disabled(vcpu))
300 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
301 else
302 vcpu->arch.sie_block->lctl |= LCTL_CR0;
303}
304
305static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
306{
5f94c58e 307 if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
383d0b05
JF		 308 return;
309 if (psw_mchk_disabled(vcpu))
310 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
311 else
312 vcpu->arch.sie_block->lctl |= LCTL_CR14;
313}
314
6cddd432
DH		 315static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
316{
317 if (kvm_s390_is_stop_irq_pending(vcpu))
318 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
319}
320
6d3da241
JF		 321/* Set interception request for non-deliverable interrupts */
322static void set_intercept_indicators(struct kvm_vcpu *vcpu)
383d0b05 323{
6d3da241 324 set_intercept_indicators_io(vcpu);
383d0b05
JF		 325 set_intercept_indicators_ext(vcpu);
326 set_intercept_indicators_mchk(vcpu);
6cddd432 327 set_intercept_indicators_stop(vcpu);
383d0b05
JF		 328}
329
8a2ef71b
JF		 330static u16 get_ilc(struct kvm_vcpu *vcpu)
331{
8a2ef71b
JF		 332 switch (vcpu->arch.sie_block->icptcode) {
333 case ICPT_INST:
334 case ICPT_INSTPROGI:
335 case ICPT_OPEREXC:
336 case ICPT_PARTEXEC:
337 case ICPT_IOINST:
338 /* last instruction only stored for these icptcodes */
33b412ac 339 return insn_length(vcpu->arch.sie_block->ipa >> 8);
8a2ef71b
JF		 340 case ICPT_PROGI:
341 return vcpu->arch.sie_block->pgmilc;
342 default:
343 return 0;
344 }
345}
346
0fb97abe
JF		 347static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
348{
383d0b05 349 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 350 int rc;
351
352 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
353 0, 0);
354
355 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
356 (u16 *)__LC_EXT_INT_CODE);
467fc298 357 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 358 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
359 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
360 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
361 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 362 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
99e20009 363 return rc ? -EFAULT : 0;
0fb97abe
JF		 364}
365
366static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
367{
383d0b05 368 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 369 int rc;
370
371 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
372 0, 0);
373
374 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
375 (u16 __user *)__LC_EXT_INT_CODE);
467fc298 376 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 377 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
378 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
379 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
380 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 381 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
99e20009 382 return rc ? -EFAULT : 0;
0fb97abe
JF		 383}
384
383d0b05 385static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
0fb97abe 386{
383d0b05
JF		 387 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
388 struct kvm_s390_ext_info ext;
0fb97abe
JF		 389 int rc;
390
383d0b05
JF		 391 spin_lock(&li->lock);
392 ext = li->irq.ext;
393 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
394 li->irq.ext.ext_params2 = 0;
395 spin_unlock(&li->lock);
396
3f24ba15
CB		 397 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
398 ext.ext_params2);
0fb97abe
JF		 399 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
400 KVM_S390_INT_PFAULT_INIT,
383d0b05 401 0, ext.ext_params2);
0fb97abe
JF		 402
403 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
404 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
405 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
406 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
407 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
408 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 409 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
99e20009 410 return rc ? -EFAULT : 0;
0fb97abe
JF		 411}
412
383d0b05 413static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
0fb97abe 414{
6d3da241 415 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
383d0b05 416 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
6d3da241 417 struct kvm_s390_mchk_info mchk = {};
bc17de7c 418 unsigned long adtl_status_addr;
6d3da241
JF		 419 int deliver = 0;
420 int rc = 0;
0fb97abe 421
6d3da241 422 spin_lock(&fi->lock);
383d0b05 423 spin_lock(&li->lock);
6d3da241
JF		 424 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
425 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
426 /*
427 * If there was an exigent machine check pending, then any
428 * repressible machine checks that might have been pending
429 * are indicated along with it, so always clear bits for
430 * repressible and exigent interrupts
431 */
432 mchk = li->irq.mchk;
433 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
434 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
435 memset(&li->irq.mchk, 0, sizeof(mchk));
436 deliver = 1;
437 }
383d0b05 438 /*
6d3da241
JF		 439 * We indicate floating repressible conditions along with
440 * other pending conditions. Channel Report Pending and Channel
441 * Subsystem damage are the only two and and are indicated by
442 * bits in mcic and masked in cr14.
383d0b05 443 */
6d3da241
JF		 444 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
445 mchk.mcic |= fi->mchk.mcic;
446 mchk.cr14 |= fi->mchk.cr14;
447 memset(&fi->mchk, 0, sizeof(mchk));
448 deliver = 1;
449 }
383d0b05 450 spin_unlock(&li->lock);
6d3da241 451 spin_unlock(&fi->lock);
383d0b05 452
6d3da241 453 if (deliver) {
3f24ba15 454 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
6d3da241
JF		 455 mchk.mcic);
456 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
457 KVM_S390_MCHK,
458 mchk.cr14, mchk.mcic);
459
460 rc = kvm_s390_vcpu_store_status(vcpu,
461 KVM_S390_STORE_STATUS_PREFIXED);
462 rc |= read_guest_lc(vcpu, __LC_VX_SAVE_AREA_ADDR,
463 &adtl_status_addr,
464 sizeof(unsigned long));
465 rc |= kvm_s390_vcpu_store_adtl_status(vcpu,
466 adtl_status_addr);
467 rc |= put_guest_lc(vcpu, mchk.mcic,
468 (u64 __user *) __LC_MCCK_CODE);
469 rc |= put_guest_lc(vcpu, mchk.failing_storage_address,
470 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
471 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA,
472 &mchk.fixed_logout,
473 sizeof(mchk.fixed_logout));
474 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
475 &vcpu->arch.sie_block->gpsw,
476 sizeof(psw_t));
477 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
478 &vcpu->arch.sie_block->gpsw,
479 sizeof(psw_t));
480 }
99e20009 481 return rc ? -EFAULT : 0;
0fb97abe
JF		 482}
483
484static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
485{
383d0b05 486 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe
JF		 487 int rc;
488
3f24ba15 489 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
0fb97abe
JF		 490 vcpu->stat.deliver_restart_signal++;
491 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
492
493 rc = write_guest_lc(vcpu,
494 offsetof(struct _lowcore, restart_old_psw),
495 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
496 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
497 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
383d0b05 498 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
99e20009 499 return rc ? -EFAULT : 0;
0fb97abe
JF		 500}
501
383d0b05 502static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
0fb97abe 503{
383d0b05
JF		 504 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
505 struct kvm_s390_prefix_info prefix;
506
507 spin_lock(&li->lock);
508 prefix = li->irq.prefix;
509 li->irq.prefix.address = 0;
510 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
511 spin_unlock(&li->lock);
0fb97abe 512
0fb97abe
JF		 513 vcpu->stat.deliver_prefix_signal++;
514 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
515 KVM_S390_SIGP_SET_PREFIX,
383d0b05 516 prefix.address, 0);
0fb97abe 517
383d0b05 518 kvm_s390_set_prefix(vcpu, prefix.address);
0fb97abe
JF		 519 return 0;
520}
521
383d0b05 522static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
0fb97abe 523{
383d0b05 524 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
0fb97abe 525 int rc;
383d0b05
JF		 526 int cpu_addr;
527
528 spin_lock(&li->lock);
529 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
530 clear_bit(cpu_addr, li->sigp_emerg_pending);
531 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
532 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
533 spin_unlock(&li->lock);
0fb97abe 534
3f24ba15 535 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
0fb97abe 536 vcpu->stat.deliver_emergency_signal++;
383d0b05
JF		 537 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
538 cpu_addr, 0);
0fb97abe
JF		 539
540 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
541 (u16 *)__LC_EXT_INT_CODE);
383d0b05 542 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 543 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
544 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
545 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
546 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 547 return rc ? -EFAULT : 0;
0fb97abe
JF		 548}
549
383d0b05 550static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
0fb97abe 551{
383d0b05
JF		 552 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
553 struct kvm_s390_extcall_info extcall;
0fb97abe
JF		 554 int rc;
555
383d0b05
JF		 556 spin_lock(&li->lock);
557 extcall = li->irq.extcall;
558 li->irq.extcall.code = 0;
559 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
560 spin_unlock(&li->lock);
561
3f24ba15 562 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
0fb97abe
JF		 563 vcpu->stat.deliver_external_call++;
564 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
565 KVM_S390_INT_EXTERNAL_CALL,
383d0b05 566 extcall.code, 0);
0fb97abe
JF		 567
568 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
569 (u16 *)__LC_EXT_INT_CODE);
383d0b05 570 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 571 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
572 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
573 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
574 sizeof(psw_t));
99e20009 575 return rc ? -EFAULT : 0;
0fb97abe
JF		 576}
577
383d0b05 578static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
8712836b 579{
383d0b05
JF		 580 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
581 struct kvm_s390_pgm_info pgm_info;
a9a846fd 582 int rc = 0, nullifying = false;
8a2ef71b 583 u16 ilc = get_ilc(vcpu);
8712836b 584
383d0b05
JF		 585 spin_lock(&li->lock);
586 pgm_info = li->irq.pgm;
587 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
588 memset(&li->irq.pgm, 0, sizeof(pgm_info));
589 spin_unlock(&li->lock);
590
3f24ba15 591 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilc:%d",
383d0b05 592 pgm_info.code, ilc);
0fb97abe
JF		 593 vcpu->stat.deliver_program_int++;
594 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
383d0b05 595 pgm_info.code, 0);
0fb97abe 596
383d0b05 597 switch (pgm_info.code & ~PGM_PER) {
8712836b
DH		 598 case PGM_AFX_TRANSLATION:
599 case PGM_ASX_TRANSLATION:
600 case PGM_EX_TRANSLATION:
601 case PGM_LFX_TRANSLATION:
602 case PGM_LSTE_SEQUENCE:
603 case PGM_LSX_TRANSLATION:
604 case PGM_LX_TRANSLATION:
605 case PGM_PRIMARY_AUTHORITY:
606 case PGM_SECONDARY_AUTHORITY:
a9a846fd
TH		 607 nullifying = true;
608 /* fall through */
8712836b 609 case PGM_SPACE_SWITCH:
383d0b05 610 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b
DH		 611 (u64 *)__LC_TRANS_EXC_CODE);
612 break;
613 case PGM_ALEN_TRANSLATION:
614 case PGM_ALE_SEQUENCE:
615 case PGM_ASTE_INSTANCE:
616 case PGM_ASTE_SEQUENCE:
617 case PGM_ASTE_VALIDITY:
618 case PGM_EXTENDED_AUTHORITY:
383d0b05 619 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 620 (u8 *)__LC_EXC_ACCESS_ID);
a9a846fd 621 nullifying = true;
8712836b
DH		 622 break;
623 case PGM_ASCE_TYPE:
624 case PGM_PAGE_TRANSLATION:
625 case PGM_REGION_FIRST_TRANS:
626 case PGM_REGION_SECOND_TRANS:
627 case PGM_REGION_THIRD_TRANS:
628 case PGM_SEGMENT_TRANSLATION:
383d0b05 629 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 630 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 631 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b 632 (u8 *)__LC_EXC_ACCESS_ID);
383d0b05 633 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
8712836b 634 (u8 *)__LC_OP_ACCESS_ID);
a9a846fd 635 nullifying = true;
8712836b
DH		 636 break;
637 case PGM_MONITOR:
383d0b05 638 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
a36c5393 639 (u16 *)__LC_MON_CLASS_NR);
383d0b05 640 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
8712836b
DH		 641 (u64 *)__LC_MON_CODE);
642 break;
403c8648 643 case PGM_VECTOR_PROCESSING:
8712836b 644 case PGM_DATA:
383d0b05 645 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
8712836b
DH		 646 (u32 *)__LC_DATA_EXC_CODE);
647 break;
648 case PGM_PROTECTION:
383d0b05 649 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
8712836b 650 (u64 *)__LC_TRANS_EXC_CODE);
383d0b05 651 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
8712836b
DH		 652 (u8 *)__LC_EXC_ACCESS_ID);
653 break;
a9a846fd
TH		 654 case PGM_STACK_FULL:
655 case PGM_STACK_EMPTY:
656 case PGM_STACK_SPECIFICATION:
657 case PGM_STACK_TYPE:
658 case PGM_STACK_OPERATION:
659 case PGM_TRACE_TABEL:
660 case PGM_CRYPTO_OPERATION:
661 nullifying = true;
662 break;
8712836b
DH		 663 }
664
383d0b05
JF		 665 if (pgm_info.code & PGM_PER) {
666 rc |= put_guest_lc(vcpu, pgm_info.per_code,
8712836b 667 (u8 *) __LC_PER_CODE);
383d0b05 668 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
8712836b 669 (u8 *)__LC_PER_ATMID);
383d0b05 670 rc |= put_guest_lc(vcpu, pgm_info.per_address,
8712836b 671 (u64 *) __LC_PER_ADDRESS);
383d0b05 672 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
8712836b
DH		 673 (u8 *) __LC_PER_ACCESS_ID);
674 }
675
a9a846fd
TH		 676 if (nullifying && vcpu->arch.sie_block->icptcode == ICPT_INST)
677 kvm_s390_rewind_psw(vcpu, ilc);
678
8a2ef71b 679 rc |= put_guest_lc(vcpu, ilc, (u16 *) __LC_PGM_ILC);
2ba45968
DH		 680 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
681 (u64 *) __LC_LAST_BREAK);
383d0b05 682 rc |= put_guest_lc(vcpu, pgm_info.code,
8712836b
DH		 683 (u16 *)__LC_PGM_INT_CODE);
684 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
685 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
686 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
687 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
99e20009 688 return rc ? -EFAULT : 0;
0fb97abe
JF		 689}
690
6d3da241 691static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
0fb97abe 692{
6d3da241
JF		 693 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
694 struct kvm_s390_ext_info ext;
695 int rc = 0;
696
697 spin_lock(&fi->lock);
698 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
699 spin_unlock(&fi->lock);
700 return 0;
701 }
702 ext = fi->srv_signal;
703 memset(&fi->srv_signal, 0, sizeof(ext));
704 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
705 spin_unlock(&fi->lock);
0fb97abe 706
3f24ba15 707 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
6d3da241 708 ext.ext_params);
0fb97abe 709 vcpu->stat.deliver_service_signal++;
6d3da241
JF		 710 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
711 ext.ext_params, 0);
0fb97abe
JF		 712
713 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
467fc298 714 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
0fb97abe
JF		 715 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
716 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
717 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
718 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
6d3da241 719 rc |= put_guest_lc(vcpu, ext.ext_params,
0fb97abe 720 (u32 *)__LC_EXT_PARAMS);
6d3da241 721
99e20009 722 return rc ? -EFAULT : 0;
0fb97abe
JF		 723}
724
6d3da241 725static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
0fb97abe 726{
6d3da241
JF		 727 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
728 struct kvm_s390_interrupt_info *inti;
729 int rc = 0;
0fb97abe 730
6d3da241
JF		 731 spin_lock(&fi->lock);
732 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
733 struct kvm_s390_interrupt_info,
734 list);
735 if (inti) {
6d3da241
JF		 736 list_del(&inti->list);
737 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
738 }
739 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
740 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
741 spin_unlock(&fi->lock);
8712836b 742
6d3da241 743 if (inti) {
3f24ba15
CB		 744 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
745 KVM_S390_INT_PFAULT_DONE, 0,
746 inti->ext.ext_params2);
747 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
748 inti->ext.ext_params2);
749
6d3da241
JF		 750 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
751 (u16 *)__LC_EXT_INT_CODE);
752 rc |= put_guest_lc(vcpu, PFAULT_DONE,
753 (u16 *)__LC_EXT_CPU_ADDR);
754 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
755 &vcpu->arch.sie_block->gpsw,
756 sizeof(psw_t));
757 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
758 &vcpu->arch.sie_block->gpsw,
759 sizeof(psw_t));
760 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
761 (u64 *)__LC_EXT_PARAMS2);
762 kfree(inti);
763 }
99e20009 764 return rc ? -EFAULT : 0;
0fb97abe
JF		 765}
766
6d3da241 767static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
0fb97abe 768{
6d3da241
JF		 769 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
770 struct kvm_s390_interrupt_info *inti;
771 int rc = 0;
0fb97abe 772
6d3da241
JF		 773 spin_lock(&fi->lock);
774 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
775 struct kvm_s390_interrupt_info,
776 list);
777 if (inti) {
778 VCPU_EVENT(vcpu, 4,
3f24ba15 779 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
6d3da241
JF		 780 inti->ext.ext_params, inti->ext.ext_params2);
781 vcpu->stat.deliver_virtio_interrupt++;
782 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
783 inti->type,
784 inti->ext.ext_params,
785 inti->ext.ext_params2);
786 list_del(&inti->list);
787 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
788 }
789 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
790 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
791 spin_unlock(&fi->lock);
0fb97abe 792
6d3da241
JF		 793 if (inti) {
794 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
795 (u16 *)__LC_EXT_INT_CODE);
796 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
797 (u16 *)__LC_EXT_CPU_ADDR);
798 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
799 &vcpu->arch.sie_block->gpsw,
800 sizeof(psw_t));
801 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
802 &vcpu->arch.sie_block->gpsw,
803 sizeof(psw_t));
804 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
805 (u32 *)__LC_EXT_PARAMS);
806 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
807 (u64 *)__LC_EXT_PARAMS2);
808 kfree(inti);
809 }
99e20009 810 return rc ? -EFAULT : 0;
0fb97abe
JF		 811}
812
813static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
6d3da241 814 unsigned long irq_type)
0fb97abe 815{
6d3da241
JF		 816 struct list_head *isc_list;
817 struct kvm_s390_float_interrupt *fi;
818 struct kvm_s390_interrupt_info *inti = NULL;
819 int rc = 0;
0fb97abe 820
6d3da241 821 fi = &vcpu->kvm->arch.float_int;
8712836b 822
6d3da241
JF		 823 spin_lock(&fi->lock);
824 isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0];
825 inti = list_first_entry_or_null(isc_list,
826 struct kvm_s390_interrupt_info,
827 list);
828 if (inti) {
3f24ba15 829 VCPU_EVENT(vcpu, 4, "deliver: I/O 0x%llx", inti->type);
6d3da241
JF		 830 vcpu->stat.deliver_io_int++;
831 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
832 inti->type,
833 ((__u32)inti->io.subchannel_id << 16) |
834 inti->io.subchannel_nr,
835 ((__u64)inti->io.io_int_parm << 32) |
836 inti->io.io_int_word);
837 list_del(&inti->list);
838 fi->counters[FIRQ_CNTR_IO] -= 1;
839 }
840 if (list_empty(isc_list))
841 clear_bit(irq_type, &fi->pending_irqs);
842 spin_unlock(&fi->lock);
843
844 if (inti) {
845 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
846 (u16 *)__LC_SUBCHANNEL_ID);
847 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
848 (u16 *)__LC_SUBCHANNEL_NR);
849 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
850 (u32 *)__LC_IO_INT_PARM);
851 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
852 (u32 *)__LC_IO_INT_WORD);
853 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
854 &vcpu->arch.sie_block->gpsw,
855 sizeof(psw_t));
856 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
857 &vcpu->arch.sie_block->gpsw,
858 sizeof(psw_t));
859 kfree(inti);
860 }
383d0b05 861
99e20009 862 return rc ? -EFAULT : 0;
383d0b05
JF		 863}
864
865typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
866
867static const deliver_irq_t deliver_irq_funcs[] = {
868 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
6d3da241 869 [IRQ_PEND_MCHK_REP] = __deliver_machine_check,
383d0b05
JF		 870 [IRQ_PEND_PROG] = __deliver_prog,
871 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
872 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
873 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
874 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
875 [IRQ_PEND_RESTART] = __deliver_restart,
383d0b05
JF		 876 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
877 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
6d3da241
JF		 878 [IRQ_PEND_EXT_SERVICE] = __deliver_service,
879 [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done,
880 [IRQ_PEND_VIRTIO] = __deliver_virtio,
383d0b05
JF		 881};
882
ea5f4969
DH		 883/* Check whether an external call is pending (deliverable or not) */
884int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
4953919f 885{
ea5f4969 886 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
4953919f 887
37c5f6c8 888 if (!sclp.has_sigpif)
ea5f4969 889 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
4953919f 890
a5bd7647 891 return sca_ext_call_pending(vcpu, NULL);
4953919f
DH		 892}
893
9a022067 894int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
ba5c1e9b 895{
4d32ad6b
DH		 896 if (deliverable_irqs(vcpu))
897 return 1;
ba5c1e9b 898
4d32ad6b
DH		 899 if (kvm_cpu_has_pending_timer(vcpu))
900 return 1;
ba5c1e9b 901
ea5f4969 902 /* external call pending and deliverable */
4d32ad6b 903 if (kvm_s390_ext_call_pending(vcpu) &&
ea5f4969
DH		 904 !psw_extint_disabled(vcpu) &&
905 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
4d32ad6b 906 return 1;
4953919f 907
4d32ad6b
DH		 908 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
909 return 1;
910 return 0;
ba5c1e9b
CO		 911}
912
3d80840d
MT		 913int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
914{
b4aec925 915 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
3d80840d
MT		 916}
917
ba5c1e9b
CO		 918int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
919{
920 u64 now, sltime;
ba5c1e9b
CO		 921
922 vcpu->stat.exit_wait_state++;
ba5c1e9b 923
0759d068 924 /* fast path */
118b862b 925 if (kvm_arch_vcpu_runnable(vcpu))
0759d068 926 return 0;
e52b2af5 927
ba5c1e9b
CO		 928 if (psw_interrupts_disabled(vcpu)) {
929 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
b8e660b8 930 return -EOPNOTSUPP; /* disabled wait */
ba5c1e9b
CO		 931 }
932
bb78c5ec 933 if (!ckc_interrupts_enabled(vcpu)) {
ba5c1e9b 934 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
bda343ef 935 __set_cpu_idle(vcpu);
ba5c1e9b
CO		 936 goto no_timer;
937 }
938
60417fcc 939 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
ed4f2094 940 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
bda343ef
DH		 941
942 /* underflow */
943 if (vcpu->arch.sie_block->ckc < now)
944 return 0;
945
946 __set_cpu_idle(vcpu);
ca872302 947 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
3f24ba15 948 VCPU_EVENT(vcpu, 4, "enabled wait via clock comparator: %llu ns", sltime);
ba5c1e9b 949no_timer:
800c1065 950 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
0759d068 951 kvm_vcpu_block(vcpu);
ba5c1e9b 952 __unset_cpu_idle(vcpu);
800c1065
TH		 953 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
954
2d00f759 955 hrtimer_cancel(&vcpu->arch.ckc_timer);
ba5c1e9b
CO		 956 return 0;
957}
958
0e9c85a5
DH		 959void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
960{
961 if (waitqueue_active(&vcpu->wq)) {
962 /*
963 * The vcpu gave up the cpu voluntarily, mark it as a good
964 * yield-candidate.
965 */
966 vcpu->preempted = true;
967 wake_up_interruptible(&vcpu->wq);
ce2e4f0b 968 vcpu->stat.halt_wakeup++;
0e9c85a5
DH		 969 }
970}
971
ca872302
CB		 972enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
973{
974 struct kvm_vcpu *vcpu;
2d00f759 975 u64 now, sltime;
ca872302
CB		 976
977 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
60417fcc 978 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
2d00f759 979 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
ca872302 980
2d00f759
DH		 981 /*
982 * If the monotonic clock runs faster than the tod clock we might be
983 * woken up too early and have to go back to sleep to avoid deadlocks.
984 */
985 if (vcpu->arch.sie_block->ckc > now &&
986 hrtimer_forward_now(timer, ns_to_ktime(sltime)))
987 return HRTIMER_RESTART;
988 kvm_s390_vcpu_wakeup(vcpu);
ca872302
CB		 989 return HRTIMER_NORESTART;
990}
ba5c1e9b 991
2ed10cc1
JF		 992void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
993{
994 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2ed10cc1 995
4ae3c081 996 spin_lock(&li->lock);
383d0b05
JF		 997 li->pending_irqs = 0;
998 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
999 memset(&li->irq, 0, sizeof(li->irq));
4ae3c081 1000 spin_unlock(&li->lock);
4953919f 1001
a5bd7647 1002 sca_clear_ext_call(vcpu);
2ed10cc1
JF		 1003}
1004
614aeab4 1005int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
ba5c1e9b 1006{
180c12fb 1007 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1008 deliver_irq_t func;
79395031 1009 int rc = 0;
383d0b05 1010 unsigned long irq_type;
6d3da241 1011 unsigned long irqs;
ba5c1e9b
CO		 1012
1013 __reset_intercept_indicators(vcpu);
ba5c1e9b 1014
383d0b05
JF		 1015 /* pending ckc conditions might have been invalidated */
1016 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
b4aec925 1017 if (ckc_irq_pending(vcpu))
383d0b05
JF		 1018 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1019
b4aec925
DH		 1020 /* pending cpu timer conditions might have been invalidated */
1021 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1022 if (cpu_timer_irq_pending(vcpu))
1023 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1024
ffeca0ae 1025 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
383d0b05 1026 /* bits are in the order of interrupt priority */
6d3da241 1027 irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT);
6d3da241
JF		 1028 if (is_ioirq(irq_type)) {
1029 rc = __deliver_io(vcpu, irq_type);
1030 } else {
1031 func = deliver_irq_funcs[irq_type];
1032 if (!func) {
1033 WARN_ON_ONCE(func == NULL);
1034 clear_bit(irq_type, &li->pending_irqs);
1035 continue;
1036 }
1037 rc = func(vcpu);
383d0b05 1038 }
ffeca0ae 1039 }
383d0b05 1040
6d3da241 1041 set_intercept_indicators(vcpu);
79395031
JF		 1042
1043 return rc;
ba5c1e9b
CO		 1044}
1045
383d0b05 1046static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1047{
1048 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1049
ed2afcfa
DH		 1050 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1051 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1052 irq->u.pgm.code, 0);
1053
238293b1
DH		 1054 if (irq->u.pgm.code == PGM_PER) {
1055 li->irq.pgm.code |= PGM_PER;
1056 /* only modify PER related information */
1057 li->irq.pgm.per_address = irq->u.pgm.per_address;
1058 li->irq.pgm.per_code = irq->u.pgm.per_code;
1059 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1060 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1061 } else if (!(irq->u.pgm.code & PGM_PER)) {
1062 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1063 irq->u.pgm.code;
1064 /* only modify non-PER information */
1065 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1066 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1067 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1068 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1069 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1070 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1071 } else {
1072 li->irq.pgm = irq->u.pgm;
1073 }
9185124e 1074 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
0146a7b0
JF		 1075 return 0;
1076}
1077
383d0b05 1078static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1079{
1080 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1081
3f24ba15
CB		 1082 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1083 irq->u.ext.ext_params2);
383d0b05
JF		 1084 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1085 irq->u.ext.ext_params,
ed2afcfa 1086 irq->u.ext.ext_params2);
383d0b05
JF		 1087
1088 li->irq.ext = irq->u.ext;
1089 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
805de8f4 1090 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1091 return 0;
1092}
1093
0675d92d 1094static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1095{
1096 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1097 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
ea5f4969 1098 uint16_t src_id = irq->u.extcall.code;
0146a7b0 1099
3f24ba15 1100 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
ea5f4969 1101 src_id);
383d0b05 1102 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
ed2afcfa 1103 src_id, 0);
ea5f4969
DH		 1104
1105 /* sending vcpu invalid */
152e9f65 1106 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
ea5f4969
DH		 1107 return -EINVAL;
1108
37c5f6c8 1109 if (sclp.has_sigpif)
a5bd7647 1110 return sca_inject_ext_call(vcpu, src_id);
383d0b05 1111
b938eace 1112 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
ea5f4969 1113 return -EBUSY;
383d0b05 1114 *extcall = irq->u.extcall;
805de8f4 1115 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1116 return 0;
1117}
1118
383d0b05 1119static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1120{
1121 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1122 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
0146a7b0 1123
ed2afcfa 1124 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
556cc0da 1125 irq->u.prefix.address);
383d0b05 1126 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
ed2afcfa 1127 irq->u.prefix.address, 0);
383d0b05 1128
a3a9c59a
DH		 1129 if (!is_vcpu_stopped(vcpu))
1130 return -EBUSY;
1131
383d0b05
JF		 1132 *prefix = irq->u.prefix;
1133 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
0146a7b0
JF		 1134 return 0;
1135}
1136
6cddd432 1137#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
383d0b05 1138static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1139{
1140 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2822545f 1141 struct kvm_s390_stop_info *stop = &li->irq.stop;
6cddd432 1142 int rc = 0;
0146a7b0 1143
ed2afcfa 1144 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
383d0b05 1145
2822545f
DH		 1146 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1147 return -EINVAL;
1148
6cddd432
DH		 1149 if (is_vcpu_stopped(vcpu)) {
1150 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1151 rc = kvm_s390_store_status_unloaded(vcpu,
1152 KVM_S390_STORE_STATUS_NOADDR);
1153 return rc;
1154 }
1155
1156 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1157 return -EBUSY;
2822545f 1158 stop->flags = irq->u.stop.flags;
6cddd432 1159 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
0146a7b0
JF		 1160 return 0;
1161}
1162
1163static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
383d0b05 1164 struct kvm_s390_irq *irq)
0146a7b0
JF		 1165{
1166 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1167
3f24ba15 1168 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
ed2afcfa 1169 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
383d0b05
JF		 1170
1171 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
0146a7b0
JF		 1172 return 0;
1173}
1174
1175static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
383d0b05 1176 struct kvm_s390_irq *irq)
0146a7b0
JF		 1177{
1178 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1179
3f24ba15 1180 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
383d0b05
JF		 1181 irq->u.emerg.code);
1182 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
ed2afcfa 1183 irq->u.emerg.code, 0);
383d0b05 1184
b85de33a
DH		 1185 /* sending vcpu invalid */
1186 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1187 return -EINVAL;
1188
49538d12 1189 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
383d0b05 1190 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
805de8f4 1191 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1192 return 0;
1193}
1194
383d0b05 1195static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
0146a7b0
JF		 1196{
1197 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
383d0b05 1198 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
0146a7b0 1199
3f24ba15 1200 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
556cc0da 1201 irq->u.mchk.mcic);
383d0b05 1202 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
ed2afcfa 1203 irq->u.mchk.mcic);
383d0b05
JF		 1204
1205 /*
fc2020cf
JF		 1206 * Because repressible machine checks can be indicated along with
1207 * exigent machine checks (PoP, Chapter 11, Interruption action)
1208 * we need to combine cr14, mcic and external damage code.
1209 * Failing storage address and the logout area should not be or'ed
1210 * together, we just indicate the last occurrence of the corresponding
1211 * machine check
383d0b05 1212 */
fc2020cf 1213 mchk->cr14 |= irq->u.mchk.cr14;
383d0b05 1214 mchk->mcic |= irq->u.mchk.mcic;
fc2020cf
JF		 1215 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1216 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1217 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1218 sizeof(mchk->fixed_logout));
383d0b05
JF		 1219 if (mchk->mcic & MCHK_EX_MASK)
1220 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1221 else if (mchk->mcic & MCHK_REP_MASK)
1222 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
0146a7b0
JF		 1223 return 0;
1224}
1225
383d0b05 1226static int __inject_ckc(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1227{
1228 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1229
3f24ba15 1230 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
383d0b05 1231 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
ed2afcfa 1232 0, 0);
383d0b05
JF		 1233
1234 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
805de8f4 1235 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
0146a7b0
JF		 1236 return 0;
1237}
1238
383d0b05 1239static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
0146a7b0
JF		 1240{
1241 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1242
3f24ba15 1243 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
383d0b05 1244 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
ed2afcfa 1245 0, 0);
383d0b05
JF		 1246
1247 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
805de8f4 1248 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
ba5c1e9b
CO		 1249 return 0;
1250}
1251
6d3da241
JF		 1252static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1253 int isc, u32 schid)
1254{
1255 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1256 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1257 struct kvm_s390_interrupt_info *iter;
1258 u16 id = (schid & 0xffff0000U) >> 16;
1259 u16 nr = schid & 0x0000ffffU;
1260
1261 spin_lock(&fi->lock);
1262 list_for_each_entry(iter, isc_list, list) {
1263 if (schid && (id != iter->io.subchannel_id ||
1264 nr != iter->io.subchannel_nr))
1265 continue;
1266 /* found an appropriate entry */
1267 list_del_init(&iter->list);
1268 fi->counters[FIRQ_CNTR_IO] -= 1;
1269 if (list_empty(isc_list))
1270 clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
1271 spin_unlock(&fi->lock);
1272 return iter;
1273 }
1274 spin_unlock(&fi->lock);
1275 return NULL;
1276}
383d0b05 1277
6d3da241
JF		 1278/*
1279 * Dequeue and return an I/O interrupt matching any of the interruption
1280 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
1281 */
fa6b7fe9 1282struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
6d3da241
JF		 1283 u64 isc_mask, u32 schid)
1284{
1285 struct kvm_s390_interrupt_info *inti = NULL;
1286 int isc;
1287
1288 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1289 if (isc_mask & isc_to_isc_bits(isc))
1290 inti = get_io_int(kvm, isc, schid);
1291 }
1292 return inti;
1293}
1294
1295#define SCCB_MASK 0xFFFFFFF8
1296#define SCCB_EVENT_PENDING 0x3
1297
1298static int __inject_service(struct kvm *kvm,
1299 struct kvm_s390_interrupt_info *inti)
1300{
1301 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1302
1303 spin_lock(&fi->lock);
1304 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1305 /*
1306 * Early versions of the QEMU s390 bios will inject several
1307 * service interrupts after another without handling a
1308 * condition code indicating busy.
1309 * We will silently ignore those superfluous sccb values.
1310 * A future version of QEMU will take care of serialization
1311 * of servc requests
1312 */
1313 if (fi->srv_signal.ext_params & SCCB_MASK)
1314 goto out;
1315 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1316 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1317out:
1318 spin_unlock(&fi->lock);
1319 kfree(inti);
1320 return 0;
1321}
1322
1323static int __inject_virtio(struct kvm *kvm,
1324 struct kvm_s390_interrupt_info *inti)
1325{
1326 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1327
1328 spin_lock(&fi->lock);
1329 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1330 spin_unlock(&fi->lock);
1331 return -EBUSY;
1332 }
1333 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1334 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1335 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1336 spin_unlock(&fi->lock);
1337 return 0;
1338}
1339
1340static int __inject_pfault_done(struct kvm *kvm,
1341 struct kvm_s390_interrupt_info *inti)
1342{
1343 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1344
1345 spin_lock(&fi->lock);
1346 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1347 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1348 spin_unlock(&fi->lock);
1349 return -EBUSY;
1350 }
1351 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1352 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1353 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1354 spin_unlock(&fi->lock);
1355 return 0;
1356}
1357
1358#define CR_PENDING_SUBCLASS 28
1359static int __inject_float_mchk(struct kvm *kvm,
1360 struct kvm_s390_interrupt_info *inti)
1361{
1362 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1363
1364 spin_lock(&fi->lock);
1365 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1366 fi->mchk.mcic |= inti->mchk.mcic;
1367 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1368 spin_unlock(&fi->lock);
1369 kfree(inti);
1370 return 0;
1371}
1372
1373static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
fa6b7fe9
CH		 1374{
1375 struct kvm_s390_float_interrupt *fi;
6d3da241
JF		 1376 struct list_head *list;
1377 int isc;
fa6b7fe9 1378
fa6b7fe9
CH		 1379 fi = &kvm->arch.float_int;
1380 spin_lock(&fi->lock);
6d3da241
JF		 1381 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1382 spin_unlock(&fi->lock);
1383 return -EBUSY;
a91b8ebe 1384 }
6d3da241
JF		 1385 fi->counters[FIRQ_CNTR_IO] += 1;
1386
1387 isc = int_word_to_isc(inti->io.io_int_word);
1388 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1389 list_add_tail(&inti->list, list);
1390 set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
fa6b7fe9 1391 spin_unlock(&fi->lock);
6d3da241 1392 return 0;
fa6b7fe9 1393}
ba5c1e9b 1394
96e0ed23
DH		 1395/*
1396 * Find a destination VCPU for a floating irq and kick it.
1397 */
1398static void __floating_irq_kick(struct kvm *kvm, u64 type)
ba5c1e9b 1399{
96e0ed23 1400 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
180c12fb 1401 struct kvm_s390_local_interrupt *li;
96e0ed23
DH		 1402 struct kvm_vcpu *dst_vcpu;
1403 int sigcpu, online_vcpus, nr_tries = 0;
1404
1405 online_vcpus = atomic_read(&kvm->online_vcpus);
1406 if (!online_vcpus)
1407 return;
1408
1409 /* find idle VCPUs first, then round robin */
1410 sigcpu = find_first_bit(fi->idle_mask, online_vcpus);
1411 if (sigcpu == online_vcpus) {
1412 do {
1413 sigcpu = fi->next_rr_cpu;
1414 fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus;
1415 /* avoid endless loops if all vcpus are stopped */
1416 if (nr_tries++ >= online_vcpus)
1417 return;
1418 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1419 }
1420 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1421
1422 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
1423 li = &dst_vcpu->arch.local_int;
1424 spin_lock(&li->lock);
1425 switch (type) {
1426 case KVM_S390_MCHK:
805de8f4 1427 atomic_or(CPUSTAT_STOP_INT, li->cpuflags);
96e0ed23
DH		 1428 break;
1429 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
805de8f4 1430 atomic_or(CPUSTAT_IO_INT, li->cpuflags);
96e0ed23
DH		 1431 break;
1432 default:
805de8f4 1433 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
96e0ed23
DH		 1434 break;
1435 }
1436 spin_unlock(&li->lock);
1437 kvm_s390_vcpu_wakeup(dst_vcpu);
1438}
1439
1440static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1441{
6d3da241
JF		 1442 u64 type = READ_ONCE(inti->type);
1443 int rc;
ba5c1e9b 1444
6d3da241
JF		 1445 switch (type) {
1446 case KVM_S390_MCHK:
1447 rc = __inject_float_mchk(kvm, inti);
1448 break;
1449 case KVM_S390_INT_VIRTIO:
1450 rc = __inject_virtio(kvm, inti);
1451 break;
1452 case KVM_S390_INT_SERVICE:
1453 rc = __inject_service(kvm, inti);
1454 break;
1455 case KVM_S390_INT_PFAULT_DONE:
1456 rc = __inject_pfault_done(kvm, inti);
1457 break;
1458 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1459 rc = __inject_io(kvm, inti);
1460 break;
1461 default:
a91b8ebe 1462 rc = -EINVAL;
c05c4186 1463 }
6d3da241
JF		 1464 if (rc)
1465 return rc;
1466
96e0ed23 1467 __floating_irq_kick(kvm, type);
6d3da241 1468 return 0;
c05c4186
JF		 1469}
1470
1471int kvm_s390_inject_vm(struct kvm *kvm,
1472 struct kvm_s390_interrupt *s390int)
1473{
1474 struct kvm_s390_interrupt_info *inti;
428d53be 1475 int rc;
c05c4186 1476
ba5c1e9b
CO		 1477 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1478 if (!inti)
1479 return -ENOMEM;
1480
c05c4186
JF		 1481 inti->type = s390int->type;
1482 switch (inti->type) {
ba5c1e9b 1483 case KVM_S390_INT_VIRTIO:
33e19115 1484 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
ba5c1e9b 1485 s390int->parm, s390int->parm64);
ba5c1e9b
CO		 1486 inti->ext.ext_params = s390int->parm;
1487 inti->ext.ext_params2 = s390int->parm64;
1488 break;
1489 case KVM_S390_INT_SERVICE:
3f24ba15 1490 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
ba5c1e9b
CO		 1491 inti->ext.ext_params = s390int->parm;
1492 break;
3c038e6b 1493 case KVM_S390_INT_PFAULT_DONE:
3c038e6b
DD		 1494 inti->ext.ext_params2 = s390int->parm64;
1495 break;
48a3e950 1496 case KVM_S390_MCHK:
3f24ba15 1497 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
48a3e950 1498 s390int->parm64);
48a3e950
CH		 1499 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1500 inti->mchk.mcic = s390int->parm64;
1501 break;
d8346b7d 1502 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
a37281b6 1503 if (inti->type & KVM_S390_INT_IO_AI_MASK)
d8346b7d
CH		 1504 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
1505 else
1506 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
1507 s390int->type & IOINT_CSSID_MASK,
1508 s390int->type & IOINT_SSID_MASK,
1509 s390int->type & IOINT_SCHID_MASK);
d8346b7d
CH		 1510 inti->io.subchannel_id = s390int->parm >> 16;
1511 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1512 inti->io.io_int_parm = s390int->parm64 >> 32;
1513 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1514 break;
ba5c1e9b
CO		 1515 default:
1516 kfree(inti);
1517 return -EINVAL;
1518 }
ade38c31
CH		 1519 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1520 2);
ba5c1e9b 1521
428d53be
DH		 1522 rc = __inject_vm(kvm, inti);
1523 if (rc)
1524 kfree(inti);
1525 return rc;
ba5c1e9b
CO		 1526}
1527
15462e37 1528int kvm_s390_reinject_io_int(struct kvm *kvm,
2f32d4ea
CH		 1529 struct kvm_s390_interrupt_info *inti)
1530{
15462e37 1531 return __inject_vm(kvm, inti);
2f32d4ea
CH		 1532}
1533
383d0b05
JF		 1534int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1535 struct kvm_s390_irq *irq)
1536{
1537 irq->type = s390int->type;
1538 switch (irq->type) {
1539 case KVM_S390_PROGRAM_INT:
1540 if (s390int->parm & 0xffff0000)
1541 return -EINVAL;
1542 irq->u.pgm.code = s390int->parm;
1543 break;
1544 case KVM_S390_SIGP_SET_PREFIX:
1545 irq->u.prefix.address = s390int->parm;
1546 break;
2822545f
DH		 1547 case KVM_S390_SIGP_STOP:
1548 irq->u.stop.flags = s390int->parm;
1549 break;
383d0b05 1550 case KVM_S390_INT_EXTERNAL_CALL:
94d1f564 1551 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1552 return -EINVAL;
1553 irq->u.extcall.code = s390int->parm;
1554 break;
1555 case KVM_S390_INT_EMERGENCY:
94d1f564 1556 if (s390int->parm & 0xffff0000)
383d0b05
JF		 1557 return -EINVAL;
1558 irq->u.emerg.code = s390int->parm;
1559 break;
1560 case KVM_S390_MCHK:
1561 irq->u.mchk.mcic = s390int->parm64;
1562 break;
1563 }
1564 return 0;
1565}
1566
6cddd432
DH		 1567int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1568{
1569 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1570
1571 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1572}
1573
1574void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1575{
1576 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1577
1578 spin_lock(&li->lock);
1579 li->irq.stop.flags = 0;
1580 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1581 spin_unlock(&li->lock);
1582}
1583
79e87a10 1584static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
ba5c1e9b 1585{
0146a7b0 1586 int rc;
ba5c1e9b 1587
383d0b05 1588 switch (irq->type) {
ba5c1e9b 1589 case KVM_S390_PROGRAM_INT:
383d0b05 1590 rc = __inject_prog(vcpu, irq);
ba5c1e9b 1591 break;
b7e6e4d3 1592 case KVM_S390_SIGP_SET_PREFIX:
383d0b05 1593 rc = __inject_set_prefix(vcpu, irq);
b7e6e4d3 1594 break;
ba5c1e9b 1595 case KVM_S390_SIGP_STOP:
383d0b05 1596 rc = __inject_sigp_stop(vcpu, irq);
0146a7b0 1597 break;
ba5c1e9b 1598 case KVM_S390_RESTART:
383d0b05 1599 rc = __inject_sigp_restart(vcpu, irq);
0146a7b0 1600 break;
e029ae5b 1601 case KVM_S390_INT_CLOCK_COMP:
383d0b05 1602 rc = __inject_ckc(vcpu);
0146a7b0 1603 break;
e029ae5b 1604 case KVM_S390_INT_CPU_TIMER:
383d0b05 1605 rc = __inject_cpu_timer(vcpu);
82a12737 1606 break;
7697e71f 1607 case KVM_S390_INT_EXTERNAL_CALL:
383d0b05 1608 rc = __inject_extcall(vcpu, irq);
82a12737 1609 break;
ba5c1e9b 1610 case KVM_S390_INT_EMERGENCY:
383d0b05 1611 rc = __inject_sigp_emergency(vcpu, irq);
ba5c1e9b 1612 break;
48a3e950 1613 case KVM_S390_MCHK:
383d0b05 1614 rc = __inject_mchk(vcpu, irq);
48a3e950 1615 break;
3c038e6b 1616 case KVM_S390_INT_PFAULT_INIT:
383d0b05 1617 rc = __inject_pfault_init(vcpu, irq);
3c038e6b 1618 break;
ba5c1e9b
CO		 1619 case KVM_S390_INT_VIRTIO:
1620 case KVM_S390_INT_SERVICE:
d8346b7d 1621 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
ba5c1e9b 1622 default:
0146a7b0 1623 rc = -EINVAL;
ba5c1e9b 1624 }
79e87a10
JF		 1625
1626 return rc;
1627}
1628
1629int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1630{
1631 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1632 int rc;
1633
1634 spin_lock(&li->lock);
1635 rc = do_inject_vcpu(vcpu, irq);
4ae3c081 1636 spin_unlock(&li->lock);
0146a7b0
JF		 1637 if (!rc)
1638 kvm_s390_vcpu_wakeup(vcpu);
0146a7b0 1639 return rc;
ba5c1e9b 1640}
c05c4186 1641
6d3da241 1642static inline void clear_irq_list(struct list_head *_list)
c05c4186 1643{
6d3da241 1644 struct kvm_s390_interrupt_info *inti, *n;
c05c4186 1645
6d3da241 1646 list_for_each_entry_safe(inti, n, _list, list) {
c05c4186
JF		 1647 list_del(&inti->list);
1648 kfree(inti);
1649 }
c05c4186
JF		 1650}
1651
94aa033e
JF		 1652static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
1653 struct kvm_s390_irq *irq)
c05c4186 1654{
94aa033e 1655 irq->type = inti->type;
c05c4186 1656 switch (inti->type) {
3c038e6b
DD		 1657 case KVM_S390_INT_PFAULT_INIT:
1658 case KVM_S390_INT_PFAULT_DONE:
c05c4186 1659 case KVM_S390_INT_VIRTIO:
94aa033e 1660 irq->u.ext = inti->ext;
c05c4186
JF		 1661 break;
1662 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
94aa033e 1663 irq->u.io = inti->io;
c05c4186 1664 break;
c05c4186 1665 }
c05c4186
JF		 1666}
1667
6d3da241
JF		 1668void kvm_s390_clear_float_irqs(struct kvm *kvm)
1669{
1670 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1671 int i;
1672
1673 spin_lock(&fi->lock);
f2ae45ed
JF		 1674 fi->pending_irqs = 0;
1675 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
1676 memset(&fi->mchk, 0, sizeof(fi->mchk));
6d3da241
JF		 1677 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1678 clear_irq_list(&fi->lists[i]);
1679 for (i = 0; i < FIRQ_MAX_COUNT; i++)
1680 fi->counters[i] = 0;
1681 spin_unlock(&fi->lock);
1682};
1683
94aa033e 1684static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
c05c4186
JF		 1685{
1686 struct kvm_s390_interrupt_info *inti;
1687 struct kvm_s390_float_interrupt *fi;
94aa033e 1688 struct kvm_s390_irq *buf;
6d3da241 1689 struct kvm_s390_irq *irq;
94aa033e 1690 int max_irqs;
c05c4186
JF		 1691 int ret = 0;
1692 int n = 0;
6d3da241 1693 int i;
c05c4186 1694
94aa033e
JF		 1695 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
1696 return -EINVAL;
1697
1698 /*
1699 * We are already using -ENOMEM to signal
1700 * userspace it may retry with a bigger buffer,
1701 * so we need to use something else for this case
1702 */
1703 buf = vzalloc(len);
1704 if (!buf)
1705 return -ENOBUFS;
1706
1707 max_irqs = len / sizeof(struct kvm_s390_irq);
1708
c05c4186
JF		 1709 fi = &kvm->arch.float_int;
1710 spin_lock(&fi->lock);
6d3da241
JF		 1711 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
1712 list_for_each_entry(inti, &fi->lists[i], list) {
1713 if (n == max_irqs) {
1714 /* signal userspace to try again */
1715 ret = -ENOMEM;
1716 goto out;
1717 }
1718 inti_to_irq(inti, &buf[n]);
1719 n++;
1720 }
1721 }
1722 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
94aa033e 1723 if (n == max_irqs) {
c05c4186
JF		 1724 /* signal userspace to try again */
1725 ret = -ENOMEM;
6d3da241 1726 goto out;
c05c4186 1727 }
6d3da241
JF		 1728 irq = (struct kvm_s390_irq *) &buf[n];
1729 irq->type = KVM_S390_INT_SERVICE;
1730 irq->u.ext = fi->srv_signal;
c05c4186
JF		 1731 n++;
1732 }
6d3da241
JF		 1733 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
1734 if (n == max_irqs) {
1735 /* signal userspace to try again */
1736 ret = -ENOMEM;
1737 goto out;
1738 }
1739 irq = (struct kvm_s390_irq *) &buf[n];
1740 irq->type = KVM_S390_MCHK;
1741 irq->u.mchk = fi->mchk;
1742 n++;
1743}
1744
1745out:
c05c4186 1746 spin_unlock(&fi->lock);
94aa033e
JF		 1747 if (!ret && n > 0) {
1748 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
1749 ret = -EFAULT;
1750 }
1751 vfree(buf);
c05c4186
JF		 1752
1753 return ret < 0 ? ret : n;
1754}
1755
1756static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1757{
1758 int r;
1759
1760 switch (attr->group) {
1761 case KVM_DEV_FLIC_GET_ALL_IRQS:
94aa033e 1762 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
c05c4186
JF		 1763 attr->attr);
1764 break;
1765 default:
1766 r = -EINVAL;
1767 }
1768
1769 return r;
1770}
1771
1772static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1773 u64 addr)
1774{
1775 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1776 void *target = NULL;
1777 void __user *source;
1778 u64 size;
1779
1780 if (get_user(inti->type, (u64 __user *)addr))
1781 return -EFAULT;
1782
1783 switch (inti->type) {
3c038e6b
DD		 1784 case KVM_S390_INT_PFAULT_INIT:
1785 case KVM_S390_INT_PFAULT_DONE:
c05c4186
JF		 1786 case KVM_S390_INT_VIRTIO:
1787 case KVM_S390_INT_SERVICE:
1788 target = (void *) &inti->ext;
1789 source = &uptr->u.ext;
1790 size = sizeof(inti->ext);
1791 break;
1792 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1793 target = (void *) &inti->io;
1794 source = &uptr->u.io;
1795 size = sizeof(inti->io);
1796 break;
1797 case KVM_S390_MCHK:
1798 target = (void *) &inti->mchk;
1799 source = &uptr->u.mchk;
1800 size = sizeof(inti->mchk);
1801 break;
1802 default:
1803 return -EINVAL;
1804 }
1805
1806 if (copy_from_user(target, source, size))
1807 return -EFAULT;
1808
1809 return 0;
1810}
1811
1812static int enqueue_floating_irq(struct kvm_device *dev,
1813 struct kvm_device_attr *attr)
1814{
1815 struct kvm_s390_interrupt_info *inti = NULL;
1816 int r = 0;
1817 int len = attr->attr;
1818
1819 if (len % sizeof(struct kvm_s390_irq) != 0)
1820 return -EINVAL;
1821 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1822 return -EINVAL;
1823
1824 while (len >= sizeof(struct kvm_s390_irq)) {
1825 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1826 if (!inti)
1827 return -ENOMEM;
1828
1829 r = copy_irq_from_user(inti, attr->addr);
1830 if (r) {
1831 kfree(inti);
1832 return r;
1833 }
a91b8ebe
JF		 1834 r = __inject_vm(dev->kvm, inti);
1835 if (r) {
1836 kfree(inti);
1837 return r;
1838 }
c05c4186
JF		 1839 len -= sizeof(struct kvm_s390_irq);
1840 attr->addr += sizeof(struct kvm_s390_irq);
1841 }
1842
1843 return r;
1844}
1845
841b91c5
CH		 1846static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1847{
1848 if (id >= MAX_S390_IO_ADAPTERS)
1849 return NULL;
1850 return kvm->arch.adapters[id];
1851}
1852
1853static int register_io_adapter(struct kvm_device *dev,
1854 struct kvm_device_attr *attr)
1855{
1856 struct s390_io_adapter *adapter;
1857 struct kvm_s390_io_adapter adapter_info;
1858
1859 if (copy_from_user(&adapter_info,
1860 (void __user *)attr->addr, sizeof(adapter_info)))
1861 return -EFAULT;
1862
1863 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1864 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1865 return -EINVAL;
1866
1867 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1868 if (!adapter)
1869 return -ENOMEM;
1870
1871 INIT_LIST_HEAD(&adapter->maps);
1872 init_rwsem(&adapter->maps_lock);
1873 atomic_set(&adapter->nr_maps, 0);
1874 adapter->id = adapter_info.id;
1875 adapter->isc = adapter_info.isc;
1876 adapter->maskable = adapter_info.maskable;
1877 adapter->masked = false;
1878 adapter->swap = adapter_info.swap;
1879 dev->kvm->arch.adapters[adapter->id] = adapter;
1880
1881 return 0;
1882}
1883
1884int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1885{
1886 int ret;
1887 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1888
1889 if (!adapter || !adapter->maskable)
1890 return -EINVAL;
1891 ret = adapter->masked;
1892 adapter->masked = masked;
1893 return ret;
1894}
1895
1896static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1897{
1898 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1899 struct s390_map_info *map;
1900 int ret;
1901
1902 if (!adapter || !addr)
1903 return -EINVAL;
1904
1905 map = kzalloc(sizeof(*map), GFP_KERNEL);
1906 if (!map) {
1907 ret = -ENOMEM;
1908 goto out;
1909 }
1910 INIT_LIST_HEAD(&map->list);
1911 map->guest_addr = addr;
6e0a0431 1912 map->addr = gmap_translate(kvm->arch.gmap, addr);
841b91c5
CH		 1913 if (map->addr == -EFAULT) {
1914 ret = -EFAULT;
1915 goto out;
1916 }
1917 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1918 if (ret < 0)
1919 goto out;
1920 BUG_ON(ret != 1);
1921 down_write(&adapter->maps_lock);
1922 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1923 list_add_tail(&map->list, &adapter->maps);
1924 ret = 0;
1925 } else {
1926 put_page(map->page);
1927 ret = -EINVAL;
1928 }
1929 up_write(&adapter->maps_lock);
1930out:
1931 if (ret)
1932 kfree(map);
1933 return ret;
1934}
1935
1936static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1937{
1938 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1939 struct s390_map_info *map, *tmp;
1940 int found = 0;
1941
1942 if (!adapter || !addr)
1943 return -EINVAL;
1944
1945 down_write(&adapter->maps_lock);
1946 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1947 if (map->guest_addr == addr) {
1948 found = 1;
1949 atomic_dec(&adapter->nr_maps);
1950 list_del(&map->list);
1951 put_page(map->page);
1952 kfree(map);
1953 break;
1954 }
1955 }
1956 up_write(&adapter->maps_lock);
1957
1958 return found ? 0 : -EINVAL;
1959}
1960
1961void kvm_s390_destroy_adapters(struct kvm *kvm)
1962{
1963 int i;
1964 struct s390_map_info *map, *tmp;
1965
1966 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1967 if (!kvm->arch.adapters[i])
1968 continue;
1969 list_for_each_entry_safe(map, tmp,
1970 &kvm->arch.adapters[i]->maps, list) {
1971 list_del(&map->list);
1972 put_page(map->page);
1973 kfree(map);
1974 }
1975 kfree(kvm->arch.adapters[i]);
1976 }
1977}
1978
1979static int modify_io_adapter(struct kvm_device *dev,
1980 struct kvm_device_attr *attr)
1981{
1982 struct kvm_s390_io_adapter_req req;
1983 struct s390_io_adapter *adapter;
1984 int ret;
1985
1986 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1987 return -EFAULT;
1988
1989 adapter = get_io_adapter(dev->kvm, req.id);
1990 if (!adapter)
1991 return -EINVAL;
1992 switch (req.type) {
1993 case KVM_S390_IO_ADAPTER_MASK:
1994 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1995 if (ret > 0)
1996 ret = 0;
1997 break;
1998 case KVM_S390_IO_ADAPTER_MAP:
1999 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
2000 break;
2001 case KVM_S390_IO_ADAPTER_UNMAP:
2002 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
2003 break;
2004 default:
2005 ret = -EINVAL;
2006 }
2007
2008 return ret;
2009}
2010
c05c4186
JF		 2011static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2012{
2013 int r = 0;
3c038e6b
DD		 2014 unsigned int i;
2015 struct kvm_vcpu *vcpu;
c05c4186
JF		 2016
2017 switch (attr->group) {
2018 case KVM_DEV_FLIC_ENQUEUE:
2019 r = enqueue_floating_irq(dev, attr);
2020 break;
2021 case KVM_DEV_FLIC_CLEAR_IRQS:
67335e63 2022 kvm_s390_clear_float_irqs(dev->kvm);
c05c4186 2023 break;
3c038e6b
DD		 2024 case KVM_DEV_FLIC_APF_ENABLE:
2025 dev->kvm->arch.gmap->pfault_enabled = 1;
2026 break;
2027 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2028 dev->kvm->arch.gmap->pfault_enabled = 0;
2029 /*
2030 * Make sure no async faults are in transition when
2031 * clearing the queues. So we don't need to worry
2032 * about late coming workers.
2033 */
2034 synchronize_srcu(&dev->kvm->srcu);
2035 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2036 kvm_clear_async_pf_completion_queue(vcpu);
2037 break;
841b91c5
CH		 2038 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2039 r = register_io_adapter(dev, attr);
2040 break;
2041 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2042 r = modify_io_adapter(dev, attr);
2043 break;
c05c4186
JF		 2044 default:
2045 r = -EINVAL;
2046 }
2047
2048 return r;
2049}
2050
2051static int flic_create(struct kvm_device *dev, u32 type)
2052{
2053 if (!dev)
2054 return -EINVAL;
2055 if (dev->kvm->arch.flic)
2056 return -EINVAL;
2057 dev->kvm->arch.flic = dev;
2058 return 0;
2059}
2060
2061static void flic_destroy(struct kvm_device *dev)
2062{
2063 dev->kvm->arch.flic = NULL;
2064 kfree(dev);
2065}
2066
2067/* s390 floating irq controller (flic) */
2068struct kvm_device_ops kvm_flic_ops = {
2069 .name = "kvm-flic",
2070 .get_attr = flic_get_attr,
2071 .set_attr = flic_set_attr,
2072 .create = flic_create,
2073 .destroy = flic_destroy,
2074};
84223598
CH		 2075
2076static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2077{
2078 unsigned long bit;
2079
2080 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2081
2082 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2083}
2084
2085static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2086 u64 addr)
2087{
2088 struct s390_map_info *map;
2089
2090 if (!adapter)
2091 return NULL;
2092
2093 list_for_each_entry(map, &adapter->maps, list) {
2094 if (map->guest_addr == addr)
2095 return map;
2096 }
2097 return NULL;
2098}
2099
2100static int adapter_indicators_set(struct kvm *kvm,
2101 struct s390_io_adapter *adapter,
2102 struct kvm_s390_adapter_int *adapter_int)
2103{
2104 unsigned long bit;
2105 int summary_set, idx;
2106 struct s390_map_info *info;
2107 void *map;
2108
2109 info = get_map_info(adapter, adapter_int->ind_addr);
2110 if (!info)
2111 return -1;
2112 map = page_address(info->page);
2113 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2114 set_bit(bit, map);
2115 idx = srcu_read_lock(&kvm->srcu);
2116 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2117 set_page_dirty_lock(info->page);
2118 info = get_map_info(adapter, adapter_int->summary_addr);
2119 if (!info) {
2120 srcu_read_unlock(&kvm->srcu, idx);
2121 return -1;
2122 }
2123 map = page_address(info->page);
2124 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2125 adapter->swap);
2126 summary_set = test_and_set_bit(bit, map);
2127 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2128 set_page_dirty_lock(info->page);
2129 srcu_read_unlock(&kvm->srcu, idx);
2130 return summary_set ? 0 : 1;
2131}
2132
2133/*
2134 * < 0 - not injected due to error
2135 * = 0 - coalesced, summary indicator already active
2136 * > 0 - injected interrupt
2137 */
2138static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2139 struct kvm *kvm, int irq_source_id, int level,
2140 bool line_status)
2141{
2142 int ret;
2143 struct s390_io_adapter *adapter;
2144
2145 /* We're only interested in the 0->1 transition. */
2146 if (!level)
2147 return 0;
2148 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2149 if (!adapter)
2150 return -1;
2151 down_read(&adapter->maps_lock);
2152 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2153 up_read(&adapter->maps_lock);
2154 if ((ret > 0) && !adapter->masked) {
2155 struct kvm_s390_interrupt s390int = {
2156 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2157 .parm = 0,
2158 .parm64 = (adapter->isc << 27) | 0x80000000,
2159 };
2160 ret = kvm_s390_inject_vm(kvm, &s390int);
2161 if (ret == 0)
2162 ret = 1;
2163 }
2164 return ret;
2165}
2166
8ba918d4 2167int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
84223598
CH		 2168 const struct kvm_irq_routing_entry *ue)
2169{
2170 int ret;
2171
2172 switch (ue->type) {
2173 case KVM_IRQ_ROUTING_S390_ADAPTER:
2174 e->set = set_adapter_int;
2175 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2176 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2177 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2178 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2179 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2180 ret = 0;
2181 break;
2182 default:
2183 ret = -EINVAL;
2184 }
2185
2186 return ret;
2187}
2188
2189int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2190 int irq_source_id, int level, bool line_status)
2191{
2192 return -EINVAL;
2193}
816c7667
JF		 2194
2195int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2196{
2197 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2198 struct kvm_s390_irq *buf;
2199 int r = 0;
2200 int n;
2201
2202 buf = vmalloc(len);
2203 if (!buf)
2204 return -ENOMEM;
2205
2206 if (copy_from_user((void *) buf, irqstate, len)) {
2207 r = -EFAULT;
2208 goto out_free;
2209 }
2210
2211 /*
2212 * Don't allow setting the interrupt state
2213 * when there are already interrupts pending
2214 */
2215 spin_lock(&li->lock);
2216 if (li->pending_irqs) {
2217 r = -EBUSY;
2218 goto out_unlock;
2219 }
2220
2221 for (n = 0; n < len / sizeof(*buf); n++) {
2222 r = do_inject_vcpu(vcpu, &buf[n]);
2223 if (r)
2224 break;
2225 }
2226
2227out_unlock:
2228 spin_unlock(&li->lock);
2229out_free:
2230 vfree(buf);
2231
2232 return r;
2233}
2234
2235static void store_local_irq(struct kvm_s390_local_interrupt *li,
2236 struct kvm_s390_irq *irq,
2237 unsigned long irq_type)
2238{
2239 switch (irq_type) {
2240 case IRQ_PEND_MCHK_EX:
2241 case IRQ_PEND_MCHK_REP:
2242 irq->type = KVM_S390_MCHK;
2243 irq->u.mchk = li->irq.mchk;
2244 break;
2245 case IRQ_PEND_PROG:
2246 irq->type = KVM_S390_PROGRAM_INT;
2247 irq->u.pgm = li->irq.pgm;
2248 break;
2249 case IRQ_PEND_PFAULT_INIT:
2250 irq->type = KVM_S390_INT_PFAULT_INIT;
2251 irq->u.ext = li->irq.ext;
2252 break;
2253 case IRQ_PEND_EXT_EXTERNAL:
2254 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2255 irq->u.extcall = li->irq.extcall;
2256 break;
2257 case IRQ_PEND_EXT_CLOCK_COMP:
2258 irq->type = KVM_S390_INT_CLOCK_COMP;
2259 break;
2260 case IRQ_PEND_EXT_CPU_TIMER:
2261 irq->type = KVM_S390_INT_CPU_TIMER;
2262 break;
2263 case IRQ_PEND_SIGP_STOP:
2264 irq->type = KVM_S390_SIGP_STOP;
2265 irq->u.stop = li->irq.stop;
2266 break;
2267 case IRQ_PEND_RESTART:
2268 irq->type = KVM_S390_RESTART;
2269 break;
2270 case IRQ_PEND_SET_PREFIX:
2271 irq->type = KVM_S390_SIGP_SET_PREFIX;
2272 irq->u.prefix = li->irq.prefix;
2273 break;
2274 }
2275}
2276
2277int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2278{
a5bd7647 2279 int scn;
816c7667
JF		 2280 unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
2281 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2282 unsigned long pending_irqs;
2283 struct kvm_s390_irq irq;
2284 unsigned long irq_type;
2285 int cpuaddr;
2286 int n = 0;
2287
2288 spin_lock(&li->lock);
2289 pending_irqs = li->pending_irqs;
2290 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2291 sizeof(sigp_emerg_pending));
2292 spin_unlock(&li->lock);
2293
2294 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2295 memset(&irq, 0, sizeof(irq));
2296 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2297 continue;
2298 if (n + sizeof(irq) > len)
2299 return -ENOBUFS;
2300 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2301 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2302 return -EFAULT;
2303 n += sizeof(irq);
2304 }
2305
2306 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2307 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2308 memset(&irq, 0, sizeof(irq));
2309 if (n + sizeof(irq) > len)
2310 return -ENOBUFS;
2311 irq.type = KVM_S390_INT_EMERGENCY;
2312 irq.u.emerg.code = cpuaddr;
2313 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2314 return -EFAULT;
2315 n += sizeof(irq);
2316 }
2317 }
2318
a5bd7647 2319 if (sca_ext_call_pending(vcpu, &scn)) {
816c7667
JF		 2320 if (n + sizeof(irq) > len)
2321 return -ENOBUFS;
2322 memset(&irq, 0, sizeof(irq));
2323 irq.type = KVM_S390_INT_EXTERNAL_CALL;
a5bd7647 2324 irq.u.extcall.code = scn;
816c7667
JF		 2325 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2326 return -EFAULT;
2327 n += sizeof(irq);
2328 }
2329
2330 return n;
2331}
Linux kernel - Deliverables
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