2 * handling kvm guest interrupts
4 * Copyright IBM Corp. 2008,2014
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.
10 * Author(s): Carsten Otte <cotte@de.ibm.com>
13 #include <linux/interrupt.h>
14 #include <linux/kvm_host.h>
15 #include <linux/hrtimer.h>
16 #include <linux/mmu_context.h>
17 #include <linux/signal.h>
18 #include <linux/slab.h>
19 #include <asm/asm-offsets.h>
20 #include <asm/uaccess.h>
23 #include "trace-s390.h"
25 #define IOINT_SCHID_MASK 0x0000ffff
26 #define IOINT_SSID_MASK 0x00030000
27 #define IOINT_CSSID_MASK 0x03fc0000
28 #define IOINT_AI_MASK 0x04000000
30 static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu);
32 static int is_ioint(u64 type)
34 return ((type & 0xfffe0000u) != 0xfffe0000u);
37 int psw_extint_disabled(struct kvm_vcpu *vcpu)
39 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
42 static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
44 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
47 static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
49 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
52 static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
54 if ((vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER) ||
55 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO) ||
56 (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT))
61 static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
63 if (psw_extint_disabled(vcpu) ||
64 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
66 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
67 /* No timer interrupts when single stepping */
72 static u64 int_word_to_isc_bits(u32 int_word)
74 u8 isc = (int_word & 0x38000000) >> 27;
76 return (0x80 >> isc) << 24;
79 static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
80 struct kvm_s390_interrupt_info *inti)
83 case KVM_S390_INT_EXTERNAL_CALL:
84 if (psw_extint_disabled(vcpu))
86 if (vcpu->arch.sie_block->gcr[0] & 0x2000ul)
88 case KVM_S390_INT_EMERGENCY:
89 if (psw_extint_disabled(vcpu))
91 if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
94 case KVM_S390_INT_CLOCK_COMP:
95 return ckc_interrupts_enabled(vcpu);
96 case KVM_S390_INT_CPU_TIMER:
97 if (psw_extint_disabled(vcpu))
99 if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
102 case KVM_S390_INT_SERVICE:
103 case KVM_S390_INT_PFAULT_INIT:
104 case KVM_S390_INT_PFAULT_DONE:
105 case KVM_S390_INT_VIRTIO:
106 if (psw_extint_disabled(vcpu))
108 if (vcpu->arch.sie_block->gcr[0] & 0x200ul)
111 case KVM_S390_PROGRAM_INT:
112 case KVM_S390_SIGP_STOP:
113 case KVM_S390_SIGP_SET_PREFIX:
114 case KVM_S390_RESTART:
117 if (psw_mchk_disabled(vcpu))
119 if (vcpu->arch.sie_block->gcr[14] & inti->mchk.cr14)
122 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
123 if (psw_ioint_disabled(vcpu))
125 if (vcpu->arch.sie_block->gcr[6] &
126 int_word_to_isc_bits(inti->io.io_int_word))
130 printk(KERN_WARNING "illegal interrupt type %llx\n",
137 static void __set_cpu_idle(struct kvm_vcpu *vcpu)
139 atomic_set_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
140 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
143 static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
145 atomic_clear_mask(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
146 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
149 static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
151 atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
152 &vcpu->arch.sie_block->cpuflags);
153 vcpu->arch.sie_block->lctl = 0x0000;
154 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
156 if (guestdbg_enabled(vcpu)) {
157 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
158 LCTL_CR10 | LCTL_CR11);
159 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
163 static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
165 atomic_set_mask(flag, &vcpu->arch.sie_block->cpuflags);
168 static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
169 struct kvm_s390_interrupt_info *inti)
171 switch (inti->type) {
172 case KVM_S390_INT_EXTERNAL_CALL:
173 case KVM_S390_INT_EMERGENCY:
174 case KVM_S390_INT_SERVICE:
175 case KVM_S390_INT_PFAULT_INIT:
176 case KVM_S390_INT_PFAULT_DONE:
177 case KVM_S390_INT_VIRTIO:
178 case KVM_S390_INT_CLOCK_COMP:
179 case KVM_S390_INT_CPU_TIMER:
180 if (psw_extint_disabled(vcpu))
181 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
183 vcpu->arch.sie_block->lctl |= LCTL_CR0;
185 case KVM_S390_SIGP_STOP:
186 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
189 if (psw_mchk_disabled(vcpu))
190 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
192 vcpu->arch.sie_block->lctl |= LCTL_CR14;
194 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
195 if (psw_ioint_disabled(vcpu))
196 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
198 vcpu->arch.sie_block->lctl |= LCTL_CR6;
205 static int __deliver_prog_irq(struct kvm_vcpu *vcpu,
206 struct kvm_s390_pgm_info *pgm_info)
208 const unsigned short table[] = { 2, 4, 4, 6 };
211 switch (pgm_info->code & ~PGM_PER) {
212 case PGM_AFX_TRANSLATION:
213 case PGM_ASX_TRANSLATION:
214 case PGM_EX_TRANSLATION:
215 case PGM_LFX_TRANSLATION:
216 case PGM_LSTE_SEQUENCE:
217 case PGM_LSX_TRANSLATION:
218 case PGM_LX_TRANSLATION:
219 case PGM_PRIMARY_AUTHORITY:
220 case PGM_SECONDARY_AUTHORITY:
221 case PGM_SPACE_SWITCH:
222 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
223 (u64 *)__LC_TRANS_EXC_CODE);
225 case PGM_ALEN_TRANSLATION:
226 case PGM_ALE_SEQUENCE:
227 case PGM_ASTE_INSTANCE:
228 case PGM_ASTE_SEQUENCE:
229 case PGM_ASTE_VALIDITY:
230 case PGM_EXTENDED_AUTHORITY:
231 rc = put_guest_lc(vcpu, pgm_info->exc_access_id,
232 (u8 *)__LC_EXC_ACCESS_ID);
235 case PGM_PAGE_TRANSLATION:
236 case PGM_REGION_FIRST_TRANS:
237 case PGM_REGION_SECOND_TRANS:
238 case PGM_REGION_THIRD_TRANS:
239 case PGM_SEGMENT_TRANSLATION:
240 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
241 (u64 *)__LC_TRANS_EXC_CODE);
242 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
243 (u8 *)__LC_EXC_ACCESS_ID);
244 rc |= put_guest_lc(vcpu, pgm_info->op_access_id,
245 (u8 *)__LC_OP_ACCESS_ID);
248 rc = put_guest_lc(vcpu, pgm_info->mon_class_nr,
249 (u64 *)__LC_MON_CLASS_NR);
250 rc |= put_guest_lc(vcpu, pgm_info->mon_code,
251 (u64 *)__LC_MON_CODE);
254 rc = put_guest_lc(vcpu, pgm_info->data_exc_code,
255 (u32 *)__LC_DATA_EXC_CODE);
258 rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
259 (u64 *)__LC_TRANS_EXC_CODE);
260 rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
261 (u8 *)__LC_EXC_ACCESS_ID);
265 if (pgm_info->code & PGM_PER) {
266 rc |= put_guest_lc(vcpu, pgm_info->per_code,
267 (u8 *) __LC_PER_CODE);
268 rc |= put_guest_lc(vcpu, pgm_info->per_atmid,
269 (u8 *)__LC_PER_ATMID);
270 rc |= put_guest_lc(vcpu, pgm_info->per_address,
271 (u64 *) __LC_PER_ADDRESS);
272 rc |= put_guest_lc(vcpu, pgm_info->per_access_id,
273 (u8 *) __LC_PER_ACCESS_ID);
276 switch (vcpu->arch.sie_block->icptcode) {
282 /* last instruction only stored for these icptcodes */
283 rc |= put_guest_lc(vcpu, table[vcpu->arch.sie_block->ipa >> 14],
284 (u16 *) __LC_PGM_ILC);
287 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->pgmilc,
288 (u16 *) __LC_PGM_ILC);
291 rc |= put_guest_lc(vcpu, 0,
292 (u16 *) __LC_PGM_ILC);
295 rc |= put_guest_lc(vcpu, pgm_info->code,
296 (u16 *)__LC_PGM_INT_CODE);
297 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
298 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
299 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
300 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
305 static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
306 struct kvm_s390_interrupt_info *inti)
308 const unsigned short table[] = { 2, 4, 4, 6 };
311 switch (inti->type) {
312 case KVM_S390_INT_EMERGENCY:
313 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp emerg");
314 vcpu->stat.deliver_emergency_signal++;
315 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
316 inti->emerg.code, 0);
317 rc = put_guest_lc(vcpu, 0x1201, (u16 *)__LC_EXT_INT_CODE);
318 rc |= put_guest_lc(vcpu, inti->emerg.code,
319 (u16 *)__LC_EXT_CPU_ADDR);
320 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
321 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
322 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
323 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
325 case KVM_S390_INT_EXTERNAL_CALL:
326 VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
327 vcpu->stat.deliver_external_call++;
328 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
329 inti->extcall.code, 0);
330 rc = put_guest_lc(vcpu, 0x1202, (u16 *)__LC_EXT_INT_CODE);
331 rc |= put_guest_lc(vcpu, inti->extcall.code,
332 (u16 *)__LC_EXT_CPU_ADDR);
333 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
334 &vcpu->arch.sie_block->gpsw,
336 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
337 &vcpu->arch.sie_block->gpsw,
340 case KVM_S390_INT_CLOCK_COMP:
341 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
342 inti->ext.ext_params, 0);
343 deliver_ckc_interrupt(vcpu);
345 case KVM_S390_INT_CPU_TIMER:
346 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
347 inti->ext.ext_params, 0);
348 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
349 (u16 *)__LC_EXT_INT_CODE);
350 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
351 &vcpu->arch.sie_block->gpsw,
353 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
354 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
355 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
356 (u32 *)__LC_EXT_PARAMS);
358 case KVM_S390_INT_SERVICE:
359 VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
360 inti->ext.ext_params);
361 vcpu->stat.deliver_service_signal++;
362 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
363 inti->ext.ext_params, 0);
364 rc = put_guest_lc(vcpu, 0x2401, (u16 *)__LC_EXT_INT_CODE);
365 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
366 &vcpu->arch.sie_block->gpsw,
368 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
369 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
370 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
371 (u32 *)__LC_EXT_PARAMS);
373 case KVM_S390_INT_PFAULT_INIT:
374 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
375 inti->ext.ext_params2);
376 rc = put_guest_lc(vcpu, 0x2603, (u16 *) __LC_EXT_INT_CODE);
377 rc |= put_guest_lc(vcpu, 0x0600, (u16 *) __LC_EXT_CPU_ADDR);
378 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
379 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
380 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
381 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
382 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
383 (u64 *) __LC_EXT_PARAMS2);
385 case KVM_S390_INT_PFAULT_DONE:
386 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
387 inti->ext.ext_params2);
388 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
389 rc |= put_guest_lc(vcpu, 0x0680, (u16 *)__LC_EXT_CPU_ADDR);
390 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
391 &vcpu->arch.sie_block->gpsw,
393 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
394 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
395 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
396 (u64 *)__LC_EXT_PARAMS2);
398 case KVM_S390_INT_VIRTIO:
399 VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
400 inti->ext.ext_params, inti->ext.ext_params2);
401 vcpu->stat.deliver_virtio_interrupt++;
402 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
403 inti->ext.ext_params,
404 inti->ext.ext_params2);
405 rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
406 rc |= put_guest_lc(vcpu, 0x0d00, (u16 *)__LC_EXT_CPU_ADDR);
407 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
408 &vcpu->arch.sie_block->gpsw,
410 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
411 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
412 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
413 (u32 *)__LC_EXT_PARAMS);
414 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
415 (u64 *)__LC_EXT_PARAMS2);
417 case KVM_S390_SIGP_STOP:
418 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop");
419 vcpu->stat.deliver_stop_signal++;
420 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
422 __set_intercept_indicator(vcpu, inti);
425 case KVM_S390_SIGP_SET_PREFIX:
426 VCPU_EVENT(vcpu, 4, "interrupt: set prefix to %x",
427 inti->prefix.address);
428 vcpu->stat.deliver_prefix_signal++;
429 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
430 inti->prefix.address, 0);
431 kvm_s390_set_prefix(vcpu, inti->prefix.address);
434 case KVM_S390_RESTART:
435 VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu restart");
436 vcpu->stat.deliver_restart_signal++;
437 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
439 rc = write_guest_lc(vcpu,
440 offsetof(struct _lowcore, restart_old_psw),
441 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
442 rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
443 &vcpu->arch.sie_block->gpsw,
446 case KVM_S390_PROGRAM_INT:
447 VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
449 table[vcpu->arch.sie_block->ipa >> 14]);
450 vcpu->stat.deliver_program_int++;
451 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
453 rc = __deliver_prog_irq(vcpu, &inti->pgm);
457 VCPU_EVENT(vcpu, 4, "interrupt: machine check mcic=%llx",
459 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
462 rc = kvm_s390_vcpu_store_status(vcpu,
463 KVM_S390_STORE_STATUS_PREFIXED);
464 rc |= put_guest_lc(vcpu, inti->mchk.mcic, (u64 *)__LC_MCCK_CODE);
465 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
466 &vcpu->arch.sie_block->gpsw,
468 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
469 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
472 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
474 __u32 param0 = ((__u32)inti->io.subchannel_id << 16) |
475 inti->io.subchannel_nr;
476 __u64 param1 = ((__u64)inti->io.io_int_parm << 32) |
477 inti->io.io_int_word;
478 VCPU_EVENT(vcpu, 4, "interrupt: I/O %llx", inti->type);
479 vcpu->stat.deliver_io_int++;
480 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
482 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
483 (u16 *)__LC_SUBCHANNEL_ID);
484 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
485 (u16 *)__LC_SUBCHANNEL_NR);
486 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
487 (u32 *)__LC_IO_INT_PARM);
488 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
489 (u32 *)__LC_IO_INT_WORD);
490 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
491 &vcpu->arch.sie_block->gpsw,
493 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
494 &vcpu->arch.sie_block->gpsw,
502 printk("kvm: The guest lowcore is not mapped during interrupt "
503 "delivery, killing userspace\n");
508 static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
512 rc = put_guest_lc(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE);
513 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
514 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
515 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
516 &vcpu->arch.sie_block->gpsw,
519 printk("kvm: The guest lowcore is not mapped during interrupt "
520 "delivery, killing userspace\n");
525 /* Check whether SIGP interpretation facility has an external call pending */
526 int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu)
528 atomic_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl;
530 if (!psw_extint_disabled(vcpu) &&
531 (vcpu->arch.sie_block->gcr[0] & 0x2000ul) &&
532 (atomic_read(sigp_ctrl) & SIGP_CTRL_C) &&
533 (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND))
539 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
541 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
542 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
543 struct kvm_s390_interrupt_info *inti;
546 if (atomic_read(&li->active)) {
547 spin_lock_bh(&li->lock);
548 list_for_each_entry(inti, &li->list, list)
549 if (__interrupt_is_deliverable(vcpu, inti)) {
553 spin_unlock_bh(&li->lock);
556 if ((!rc) && atomic_read(&fi->active)) {
557 spin_lock(&fi->lock);
558 list_for_each_entry(inti, &fi->list, list)
559 if (__interrupt_is_deliverable(vcpu, inti)) {
563 spin_unlock(&fi->lock);
566 if (!rc && kvm_cpu_has_pending_timer(vcpu))
569 if (!rc && kvm_s390_si_ext_call_pending(vcpu))
575 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
577 if (!(vcpu->arch.sie_block->ckc <
578 get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
580 if (!ckc_interrupts_enabled(vcpu))
585 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
588 DECLARE_WAITQUEUE(wait, current);
590 vcpu->stat.exit_wait_state++;
591 if (kvm_cpu_has_interrupt(vcpu))
594 __set_cpu_idle(vcpu);
595 spin_lock_bh(&vcpu->arch.local_int.lock);
596 vcpu->arch.local_int.timer_due = 0;
597 spin_unlock_bh(&vcpu->arch.local_int.lock);
599 if (psw_interrupts_disabled(vcpu)) {
600 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
601 __unset_cpu_idle(vcpu);
602 return -EOPNOTSUPP; /* disabled wait */
605 if (!ckc_interrupts_enabled(vcpu)) {
606 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
610 now = get_tod_clock_fast() + vcpu->arch.sie_block->epoch;
611 if (vcpu->arch.sie_block->ckc < now) {
612 __unset_cpu_idle(vcpu);
616 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
618 hrtimer_start(&vcpu->arch.ckc_timer, ktime_set (0, sltime) , HRTIMER_MODE_REL);
619 VCPU_EVENT(vcpu, 5, "enabled wait via clock comparator: %llx ns", sltime);
621 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
622 spin_lock(&vcpu->arch.local_int.float_int->lock);
623 spin_lock_bh(&vcpu->arch.local_int.lock);
624 add_wait_queue(&vcpu->wq, &wait);
625 while (list_empty(&vcpu->arch.local_int.list) &&
626 list_empty(&vcpu->arch.local_int.float_int->list) &&
627 (!vcpu->arch.local_int.timer_due) &&
628 !signal_pending(current) &&
629 !kvm_s390_si_ext_call_pending(vcpu)) {
630 set_current_state(TASK_INTERRUPTIBLE);
631 spin_unlock_bh(&vcpu->arch.local_int.lock);
632 spin_unlock(&vcpu->arch.local_int.float_int->lock);
634 spin_lock(&vcpu->arch.local_int.float_int->lock);
635 spin_lock_bh(&vcpu->arch.local_int.lock);
637 __unset_cpu_idle(vcpu);
638 __set_current_state(TASK_RUNNING);
639 remove_wait_queue(&vcpu->wq, &wait);
640 spin_unlock_bh(&vcpu->arch.local_int.lock);
641 spin_unlock(&vcpu->arch.local_int.float_int->lock);
642 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
644 hrtimer_try_to_cancel(&vcpu->arch.ckc_timer);
648 void kvm_s390_tasklet(unsigned long parm)
650 struct kvm_vcpu *vcpu = (struct kvm_vcpu *) parm;
652 spin_lock(&vcpu->arch.local_int.lock);
653 vcpu->arch.local_int.timer_due = 1;
654 if (waitqueue_active(&vcpu->wq))
655 wake_up_interruptible(&vcpu->wq);
656 spin_unlock(&vcpu->arch.local_int.lock);
660 * low level hrtimer wake routine. Because this runs in hardirq context
661 * we schedule a tasklet to do the real work.
663 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
665 struct kvm_vcpu *vcpu;
667 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
668 vcpu->preempted = true;
669 tasklet_schedule(&vcpu->arch.tasklet);
671 return HRTIMER_NORESTART;
674 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
676 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
677 struct kvm_s390_interrupt_info *n, *inti = NULL;
679 spin_lock_bh(&li->lock);
680 list_for_each_entry_safe(inti, n, &li->list, list) {
681 list_del(&inti->list);
684 atomic_set(&li->active, 0);
685 spin_unlock_bh(&li->lock);
687 /* clear pending external calls set by sigp interpretation facility */
688 atomic_clear_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
689 atomic_clear_mask(SIGP_CTRL_C,
690 &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl);
693 void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
695 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
696 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
697 struct kvm_s390_interrupt_info *n, *inti = NULL;
700 __reset_intercept_indicators(vcpu);
701 if (atomic_read(&li->active)) {
704 spin_lock_bh(&li->lock);
705 list_for_each_entry_safe(inti, n, &li->list, list) {
706 if (__interrupt_is_deliverable(vcpu, inti)) {
707 list_del(&inti->list);
711 __set_intercept_indicator(vcpu, inti);
713 if (list_empty(&li->list))
714 atomic_set(&li->active, 0);
715 spin_unlock_bh(&li->lock);
717 __do_deliver_interrupt(vcpu, inti);
723 if (kvm_cpu_has_pending_timer(vcpu))
724 deliver_ckc_interrupt(vcpu);
726 if (atomic_read(&fi->active)) {
729 spin_lock(&fi->lock);
730 list_for_each_entry_safe(inti, n, &fi->list, list) {
731 if (__interrupt_is_deliverable(vcpu, inti)) {
732 list_del(&inti->list);
737 __set_intercept_indicator(vcpu, inti);
739 if (list_empty(&fi->list))
740 atomic_set(&fi->active, 0);
741 spin_unlock(&fi->lock);
743 __do_deliver_interrupt(vcpu, inti);
750 void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu)
752 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
753 struct kvm_s390_float_interrupt *fi = vcpu->arch.local_int.float_int;
754 struct kvm_s390_interrupt_info *n, *inti = NULL;
757 __reset_intercept_indicators(vcpu);
758 if (atomic_read(&li->active)) {
761 spin_lock_bh(&li->lock);
762 list_for_each_entry_safe(inti, n, &li->list, list) {
763 if ((inti->type == KVM_S390_MCHK) &&
764 __interrupt_is_deliverable(vcpu, inti)) {
765 list_del(&inti->list);
769 __set_intercept_indicator(vcpu, inti);
771 if (list_empty(&li->list))
772 atomic_set(&li->active, 0);
773 spin_unlock_bh(&li->lock);
775 __do_deliver_interrupt(vcpu, inti);
781 if (atomic_read(&fi->active)) {
784 spin_lock(&fi->lock);
785 list_for_each_entry_safe(inti, n, &fi->list, list) {
786 if ((inti->type == KVM_S390_MCHK) &&
787 __interrupt_is_deliverable(vcpu, inti)) {
788 list_del(&inti->list);
793 __set_intercept_indicator(vcpu, inti);
795 if (list_empty(&fi->list))
796 atomic_set(&fi->active, 0);
797 spin_unlock(&fi->lock);
799 __do_deliver_interrupt(vcpu, inti);
806 int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
808 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
809 struct kvm_s390_interrupt_info *inti;
811 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
815 inti->type = KVM_S390_PROGRAM_INT;
816 inti->pgm.code = code;
818 VCPU_EVENT(vcpu, 3, "inject: program check %d (from kernel)", code);
819 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, inti->type, code, 0, 1);
820 spin_lock_bh(&li->lock);
821 list_add(&inti->list, &li->list);
822 atomic_set(&li->active, 1);
823 BUG_ON(waitqueue_active(li->wq));
824 spin_unlock_bh(&li->lock);
828 int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
829 struct kvm_s390_pgm_info *pgm_info)
831 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
832 struct kvm_s390_interrupt_info *inti;
834 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
838 VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
840 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
841 pgm_info->code, 0, 1);
843 inti->type = KVM_S390_PROGRAM_INT;
844 memcpy(&inti->pgm, pgm_info, sizeof(inti->pgm));
845 spin_lock_bh(&li->lock);
846 list_add(&inti->list, &li->list);
847 atomic_set(&li->active, 1);
848 BUG_ON(waitqueue_active(li->wq));
849 spin_unlock_bh(&li->lock);
853 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
856 struct kvm_s390_float_interrupt *fi;
857 struct kvm_s390_interrupt_info *inti, *iter;
859 if ((!schid && !cr6) || (schid && cr6))
861 mutex_lock(&kvm->lock);
862 fi = &kvm->arch.float_int;
863 spin_lock(&fi->lock);
865 list_for_each_entry(iter, &fi->list, list) {
866 if (!is_ioint(iter->type))
869 ((cr6 & int_word_to_isc_bits(iter->io.io_int_word)) == 0))
872 if (((schid & 0x00000000ffff0000) >> 16) !=
873 iter->io.subchannel_id)
875 if ((schid & 0x000000000000ffff) !=
876 iter->io.subchannel_nr)
883 list_del_init(&inti->list);
886 if (list_empty(&fi->list))
887 atomic_set(&fi->active, 0);
888 spin_unlock(&fi->lock);
889 mutex_unlock(&kvm->lock);
893 static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
895 struct kvm_s390_local_interrupt *li;
896 struct kvm_s390_float_interrupt *fi;
897 struct kvm_s390_interrupt_info *iter;
898 struct kvm_vcpu *dst_vcpu = NULL;
902 mutex_lock(&kvm->lock);
903 fi = &kvm->arch.float_int;
904 spin_lock(&fi->lock);
905 if (fi->irq_count >= KVM_S390_MAX_FLOAT_IRQS) {
910 if (!is_ioint(inti->type)) {
911 list_add_tail(&inti->list, &fi->list);
913 u64 isc_bits = int_word_to_isc_bits(inti->io.io_int_word);
915 /* Keep I/O interrupts sorted in isc order. */
916 list_for_each_entry(iter, &fi->list, list) {
917 if (!is_ioint(iter->type))
919 if (int_word_to_isc_bits(iter->io.io_int_word)
924 list_add_tail(&inti->list, &iter->list);
926 atomic_set(&fi->active, 1);
927 sigcpu = find_first_bit(fi->idle_mask, KVM_MAX_VCPUS);
928 if (sigcpu == KVM_MAX_VCPUS) {
930 sigcpu = fi->next_rr_cpu++;
931 if (sigcpu == KVM_MAX_VCPUS)
932 sigcpu = fi->next_rr_cpu = 0;
933 } while (kvm_get_vcpu(kvm, sigcpu) == NULL);
935 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
936 li = &dst_vcpu->arch.local_int;
937 spin_lock_bh(&li->lock);
938 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
939 if (waitqueue_active(li->wq))
940 wake_up_interruptible(li->wq);
941 kvm_get_vcpu(kvm, sigcpu)->preempted = true;
942 spin_unlock_bh(&li->lock);
944 spin_unlock(&fi->lock);
945 mutex_unlock(&kvm->lock);
949 int kvm_s390_inject_vm(struct kvm *kvm,
950 struct kvm_s390_interrupt *s390int)
952 struct kvm_s390_interrupt_info *inti;
954 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
958 inti->type = s390int->type;
959 switch (inti->type) {
960 case KVM_S390_INT_VIRTIO:
961 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
962 s390int->parm, s390int->parm64);
963 inti->ext.ext_params = s390int->parm;
964 inti->ext.ext_params2 = s390int->parm64;
966 case KVM_S390_INT_SERVICE:
967 VM_EVENT(kvm, 5, "inject: sclp parm:%x", s390int->parm);
968 inti->ext.ext_params = s390int->parm;
970 case KVM_S390_INT_PFAULT_DONE:
971 inti->type = s390int->type;
972 inti->ext.ext_params2 = s390int->parm64;
975 VM_EVENT(kvm, 5, "inject: machine check parm64:%llx",
977 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
978 inti->mchk.mcic = s390int->parm64;
980 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
981 if (inti->type & IOINT_AI_MASK)
982 VM_EVENT(kvm, 5, "%s", "inject: I/O (AI)");
984 VM_EVENT(kvm, 5, "inject: I/O css %x ss %x schid %04x",
985 s390int->type & IOINT_CSSID_MASK,
986 s390int->type & IOINT_SSID_MASK,
987 s390int->type & IOINT_SCHID_MASK);
988 inti->io.subchannel_id = s390int->parm >> 16;
989 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
990 inti->io.io_int_parm = s390int->parm64 >> 32;
991 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
997 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1000 return __inject_vm(kvm, inti);
1003 void kvm_s390_reinject_io_int(struct kvm *kvm,
1004 struct kvm_s390_interrupt_info *inti)
1006 __inject_vm(kvm, inti);
1009 int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
1010 struct kvm_s390_interrupt *s390int)
1012 struct kvm_s390_local_interrupt *li;
1013 struct kvm_s390_interrupt_info *inti;
1015 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1019 switch (s390int->type) {
1020 case KVM_S390_PROGRAM_INT:
1021 if (s390int->parm & 0xffff0000) {
1025 inti->type = s390int->type;
1026 inti->pgm.code = s390int->parm;
1027 VCPU_EVENT(vcpu, 3, "inject: program check %d (from user)",
1030 case KVM_S390_SIGP_SET_PREFIX:
1031 inti->prefix.address = s390int->parm;
1032 inti->type = s390int->type;
1033 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x (from user)",
1036 case KVM_S390_SIGP_STOP:
1037 case KVM_S390_RESTART:
1038 case KVM_S390_INT_CLOCK_COMP:
1039 case KVM_S390_INT_CPU_TIMER:
1040 VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
1041 inti->type = s390int->type;
1043 case KVM_S390_INT_EXTERNAL_CALL:
1044 if (s390int->parm & 0xffff0000) {
1048 VCPU_EVENT(vcpu, 3, "inject: external call source-cpu:%u",
1050 inti->type = s390int->type;
1051 inti->extcall.code = s390int->parm;
1053 case KVM_S390_INT_EMERGENCY:
1054 if (s390int->parm & 0xffff0000) {
1058 VCPU_EVENT(vcpu, 3, "inject: emergency %u\n", s390int->parm);
1059 inti->type = s390int->type;
1060 inti->emerg.code = s390int->parm;
1063 VCPU_EVENT(vcpu, 5, "inject: machine check parm64:%llx",
1065 inti->type = s390int->type;
1066 inti->mchk.mcic = s390int->parm64;
1068 case KVM_S390_INT_PFAULT_INIT:
1069 inti->type = s390int->type;
1070 inti->ext.ext_params2 = s390int->parm64;
1072 case KVM_S390_INT_VIRTIO:
1073 case KVM_S390_INT_SERVICE:
1074 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1079 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, s390int->type, s390int->parm,
1080 s390int->parm64, 2);
1082 mutex_lock(&vcpu->kvm->lock);
1083 li = &vcpu->arch.local_int;
1084 spin_lock_bh(&li->lock);
1085 if (inti->type == KVM_S390_PROGRAM_INT)
1086 list_add(&inti->list, &li->list);
1088 list_add_tail(&inti->list, &li->list);
1089 atomic_set(&li->active, 1);
1090 if (inti->type == KVM_S390_SIGP_STOP)
1091 li->action_bits |= ACTION_STOP_ON_STOP;
1092 atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
1093 if (waitqueue_active(&vcpu->wq))
1094 wake_up_interruptible(&vcpu->wq);
1095 vcpu->preempted = true;
1096 spin_unlock_bh(&li->lock);
1097 mutex_unlock(&vcpu->kvm->lock);
1101 void kvm_s390_clear_float_irqs(struct kvm *kvm)
1103 struct kvm_s390_float_interrupt *fi;
1104 struct kvm_s390_interrupt_info *n, *inti = NULL;
1106 mutex_lock(&kvm->lock);
1107 fi = &kvm->arch.float_int;
1108 spin_lock(&fi->lock);
1109 list_for_each_entry_safe(inti, n, &fi->list, list) {
1110 list_del(&inti->list);
1114 atomic_set(&fi->active, 0);
1115 spin_unlock(&fi->lock);
1116 mutex_unlock(&kvm->lock);
1119 static inline int copy_irq_to_user(struct kvm_s390_interrupt_info *inti,
1122 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1123 struct kvm_s390_irq irq = {0};
1125 irq.type = inti->type;
1126 switch (inti->type) {
1127 case KVM_S390_INT_PFAULT_INIT:
1128 case KVM_S390_INT_PFAULT_DONE:
1129 case KVM_S390_INT_VIRTIO:
1130 case KVM_S390_INT_SERVICE:
1131 irq.u.ext = inti->ext;
1133 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1134 irq.u.io = inti->io;
1137 irq.u.mchk = inti->mchk;
1143 if (copy_to_user(uptr, &irq, sizeof(irq)))
1149 static int get_all_floating_irqs(struct kvm *kvm, __u8 *buf, __u64 len)
1151 struct kvm_s390_interrupt_info *inti;
1152 struct kvm_s390_float_interrupt *fi;
1156 mutex_lock(&kvm->lock);
1157 fi = &kvm->arch.float_int;
1158 spin_lock(&fi->lock);
1160 list_for_each_entry(inti, &fi->list, list) {
1161 if (len < sizeof(struct kvm_s390_irq)) {
1162 /* signal userspace to try again */
1166 ret = copy_irq_to_user(inti, buf);
1169 buf += sizeof(struct kvm_s390_irq);
1170 len -= sizeof(struct kvm_s390_irq);
1174 spin_unlock(&fi->lock);
1175 mutex_unlock(&kvm->lock);
1177 return ret < 0 ? ret : n;
1180 static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1184 switch (attr->group) {
1185 case KVM_DEV_FLIC_GET_ALL_IRQS:
1186 r = get_all_floating_irqs(dev->kvm, (u8 *) attr->addr,
1196 static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1199 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1200 void *target = NULL;
1201 void __user *source;
1204 if (get_user(inti->type, (u64 __user *)addr))
1207 switch (inti->type) {
1208 case KVM_S390_INT_PFAULT_INIT:
1209 case KVM_S390_INT_PFAULT_DONE:
1210 case KVM_S390_INT_VIRTIO:
1211 case KVM_S390_INT_SERVICE:
1212 target = (void *) &inti->ext;
1213 source = &uptr->u.ext;
1214 size = sizeof(inti->ext);
1216 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1217 target = (void *) &inti->io;
1218 source = &uptr->u.io;
1219 size = sizeof(inti->io);
1222 target = (void *) &inti->mchk;
1223 source = &uptr->u.mchk;
1224 size = sizeof(inti->mchk);
1230 if (copy_from_user(target, source, size))
1236 static int enqueue_floating_irq(struct kvm_device *dev,
1237 struct kvm_device_attr *attr)
1239 struct kvm_s390_interrupt_info *inti = NULL;
1241 int len = attr->attr;
1243 if (len % sizeof(struct kvm_s390_irq) != 0)
1245 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1248 while (len >= sizeof(struct kvm_s390_irq)) {
1249 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1253 r = copy_irq_from_user(inti, attr->addr);
1258 r = __inject_vm(dev->kvm, inti);
1263 len -= sizeof(struct kvm_s390_irq);
1264 attr->addr += sizeof(struct kvm_s390_irq);
1270 static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1272 if (id >= MAX_S390_IO_ADAPTERS)
1274 return kvm->arch.adapters[id];
1277 static int register_io_adapter(struct kvm_device *dev,
1278 struct kvm_device_attr *attr)
1280 struct s390_io_adapter *adapter;
1281 struct kvm_s390_io_adapter adapter_info;
1283 if (copy_from_user(&adapter_info,
1284 (void __user *)attr->addr, sizeof(adapter_info)))
1287 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1288 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1291 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1295 INIT_LIST_HEAD(&adapter->maps);
1296 init_rwsem(&adapter->maps_lock);
1297 atomic_set(&adapter->nr_maps, 0);
1298 adapter->id = adapter_info.id;
1299 adapter->isc = adapter_info.isc;
1300 adapter->maskable = adapter_info.maskable;
1301 adapter->masked = false;
1302 adapter->swap = adapter_info.swap;
1303 dev->kvm->arch.adapters[adapter->id] = adapter;
1308 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
1311 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1313 if (!adapter || !adapter->maskable)
1315 ret = adapter->masked;
1316 adapter->masked = masked;
1320 static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
1322 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1323 struct s390_map_info *map;
1326 if (!adapter || !addr)
1329 map = kzalloc(sizeof(*map), GFP_KERNEL);
1334 INIT_LIST_HEAD(&map->list);
1335 map->guest_addr = addr;
1336 map->addr = gmap_translate(addr, kvm->arch.gmap);
1337 if (map->addr == -EFAULT) {
1341 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
1345 down_write(&adapter->maps_lock);
1346 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
1347 list_add_tail(&map->list, &adapter->maps);
1350 put_page(map->page);
1353 up_write(&adapter->maps_lock);
1360 static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
1362 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
1363 struct s390_map_info *map, *tmp;
1366 if (!adapter || !addr)
1369 down_write(&adapter->maps_lock);
1370 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
1371 if (map->guest_addr == addr) {
1373 atomic_dec(&adapter->nr_maps);
1374 list_del(&map->list);
1375 put_page(map->page);
1380 up_write(&adapter->maps_lock);
1382 return found ? 0 : -EINVAL;
1385 void kvm_s390_destroy_adapters(struct kvm *kvm)
1388 struct s390_map_info *map, *tmp;
1390 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
1391 if (!kvm->arch.adapters[i])
1393 list_for_each_entry_safe(map, tmp,
1394 &kvm->arch.adapters[i]->maps, list) {
1395 list_del(&map->list);
1396 put_page(map->page);
1399 kfree(kvm->arch.adapters[i]);
1403 static int modify_io_adapter(struct kvm_device *dev,
1404 struct kvm_device_attr *attr)
1406 struct kvm_s390_io_adapter_req req;
1407 struct s390_io_adapter *adapter;
1410 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
1413 adapter = get_io_adapter(dev->kvm, req.id);
1417 case KVM_S390_IO_ADAPTER_MASK:
1418 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
1422 case KVM_S390_IO_ADAPTER_MAP:
1423 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
1425 case KVM_S390_IO_ADAPTER_UNMAP:
1426 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
1435 static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1439 struct kvm_vcpu *vcpu;
1441 switch (attr->group) {
1442 case KVM_DEV_FLIC_ENQUEUE:
1443 r = enqueue_floating_irq(dev, attr);
1445 case KVM_DEV_FLIC_CLEAR_IRQS:
1447 kvm_s390_clear_float_irqs(dev->kvm);
1449 case KVM_DEV_FLIC_APF_ENABLE:
1450 dev->kvm->arch.gmap->pfault_enabled = 1;
1452 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
1453 dev->kvm->arch.gmap->pfault_enabled = 0;
1455 * Make sure no async faults are in transition when
1456 * clearing the queues. So we don't need to worry
1457 * about late coming workers.
1459 synchronize_srcu(&dev->kvm->srcu);
1460 kvm_for_each_vcpu(i, vcpu, dev->kvm)
1461 kvm_clear_async_pf_completion_queue(vcpu);
1463 case KVM_DEV_FLIC_ADAPTER_REGISTER:
1464 r = register_io_adapter(dev, attr);
1466 case KVM_DEV_FLIC_ADAPTER_MODIFY:
1467 r = modify_io_adapter(dev, attr);
1476 static int flic_create(struct kvm_device *dev, u32 type)
1480 if (dev->kvm->arch.flic)
1482 dev->kvm->arch.flic = dev;
1486 static void flic_destroy(struct kvm_device *dev)
1488 dev->kvm->arch.flic = NULL;
1492 /* s390 floating irq controller (flic) */
1493 struct kvm_device_ops kvm_flic_ops = {
1495 .get_attr = flic_get_attr,
1496 .set_attr = flic_set_attr,
1497 .create = flic_create,
1498 .destroy = flic_destroy,
1501 static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
1505 bit = bit_nr + (addr % PAGE_SIZE) * 8;
1507 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
1510 static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
1513 struct s390_map_info *map;
1518 list_for_each_entry(map, &adapter->maps, list) {
1519 if (map->guest_addr == addr)
1525 static int adapter_indicators_set(struct kvm *kvm,
1526 struct s390_io_adapter *adapter,
1527 struct kvm_s390_adapter_int *adapter_int)
1530 int summary_set, idx;
1531 struct s390_map_info *info;
1534 info = get_map_info(adapter, adapter_int->ind_addr);
1537 map = page_address(info->page);
1538 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
1540 idx = srcu_read_lock(&kvm->srcu);
1541 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1542 set_page_dirty_lock(info->page);
1543 info = get_map_info(adapter, adapter_int->summary_addr);
1545 srcu_read_unlock(&kvm->srcu, idx);
1548 map = page_address(info->page);
1549 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
1551 summary_set = test_and_set_bit(bit, map);
1552 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
1553 set_page_dirty_lock(info->page);
1554 srcu_read_unlock(&kvm->srcu, idx);
1555 return summary_set ? 0 : 1;
1559 * < 0 - not injected due to error
1560 * = 0 - coalesced, summary indicator already active
1561 * > 0 - injected interrupt
1563 static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
1564 struct kvm *kvm, int irq_source_id, int level,
1568 struct s390_io_adapter *adapter;
1570 /* We're only interested in the 0->1 transition. */
1573 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
1576 down_read(&adapter->maps_lock);
1577 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
1578 up_read(&adapter->maps_lock);
1579 if ((ret > 0) && !adapter->masked) {
1580 struct kvm_s390_interrupt s390int = {
1581 .type = KVM_S390_INT_IO(1, 0, 0, 0),
1583 .parm64 = (adapter->isc << 27) | 0x80000000,
1585 ret = kvm_s390_inject_vm(kvm, &s390int);
1592 int kvm_set_routing_entry(struct kvm_irq_routing_table *rt,
1593 struct kvm_kernel_irq_routing_entry *e,
1594 const struct kvm_irq_routing_entry *ue)
1599 case KVM_IRQ_ROUTING_S390_ADAPTER:
1600 e->set = set_adapter_int;
1601 e->adapter.summary_addr = ue->u.adapter.summary_addr;
1602 e->adapter.ind_addr = ue->u.adapter.ind_addr;
1603 e->adapter.summary_offset = ue->u.adapter.summary_offset;
1604 e->adapter.ind_offset = ue->u.adapter.ind_offset;
1605 e->adapter.adapter_id = ue->u.adapter.adapter_id;
1615 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
1616 int irq_source_id, int level, bool line_status)