2 * handling kvm guest interrupts
4 * Copyright IBM Corp. 2008, 2015
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 <linux/bitmap.h>
20 #include <linux/vmalloc.h>
21 #include <asm/asm-offsets.h>
23 #include <linux/uaccess.h>
27 #include <asm/switch_to.h>
31 #include "trace-s390.h"
33 #define PFAULT_INIT 0x0600
34 #define PFAULT_DONE 0x0680
35 #define VIRTIO_PARAM 0x0d00
37 /* handle external calls via sigp interpretation facility */
38 static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id)
42 if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND))
45 BUG_ON(!kvm_s390_use_sca_entries());
46 read_lock(&vcpu->kvm->arch.sca_lock);
47 if (vcpu->kvm->arch.use_esca) {
48 struct esca_block *sca = vcpu->kvm->arch.sca;
49 union esca_sigp_ctrl sigp_ctrl =
50 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
55 struct bsca_block *sca = vcpu->kvm->arch.sca;
56 union bsca_sigp_ctrl sigp_ctrl =
57 sca->cpu[vcpu->vcpu_id].sigp_ctrl;
62 read_unlock(&vcpu->kvm->arch.sca_lock);
70 static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id)
74 BUG_ON(!kvm_s390_use_sca_entries());
75 read_lock(&vcpu->kvm->arch.sca_lock);
76 if (vcpu->kvm->arch.use_esca) {
77 struct esca_block *sca = vcpu->kvm->arch.sca;
78 union esca_sigp_ctrl *sigp_ctrl =
79 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
80 union esca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
86 expect = old_val.value;
87 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
89 struct bsca_block *sca = vcpu->kvm->arch.sca;
90 union bsca_sigp_ctrl *sigp_ctrl =
91 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
92 union bsca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl;
98 expect = old_val.value;
99 rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value);
101 read_unlock(&vcpu->kvm->arch.sca_lock);
104 /* another external call is pending */
107 atomic_or(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
111 static void sca_clear_ext_call(struct kvm_vcpu *vcpu)
113 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
116 if (!kvm_s390_use_sca_entries())
118 atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags);
119 read_lock(&vcpu->kvm->arch.sca_lock);
120 if (vcpu->kvm->arch.use_esca) {
121 struct esca_block *sca = vcpu->kvm->arch.sca;
122 union esca_sigp_ctrl *sigp_ctrl =
123 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
124 union esca_sigp_ctrl old = *sigp_ctrl;
127 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
129 struct bsca_block *sca = vcpu->kvm->arch.sca;
130 union bsca_sigp_ctrl *sigp_ctrl =
131 &(sca->cpu[vcpu->vcpu_id].sigp_ctrl);
132 union bsca_sigp_ctrl old = *sigp_ctrl;
135 rc = cmpxchg(&sigp_ctrl->value, old.value, 0);
137 read_unlock(&vcpu->kvm->arch.sca_lock);
138 WARN_ON(rc != expect); /* cannot clear? */
141 int psw_extint_disabled(struct kvm_vcpu *vcpu)
143 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT);
146 static int psw_ioint_disabled(struct kvm_vcpu *vcpu)
148 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO);
151 static int psw_mchk_disabled(struct kvm_vcpu *vcpu)
153 return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK);
156 static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
158 return psw_extint_disabled(vcpu) &&
159 psw_ioint_disabled(vcpu) &&
160 psw_mchk_disabled(vcpu);
163 static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
165 if (psw_extint_disabled(vcpu) ||
166 !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
168 if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
169 /* No timer interrupts when single stepping */
174 static int ckc_irq_pending(struct kvm_vcpu *vcpu)
176 if (vcpu->arch.sie_block->ckc >= kvm_s390_get_tod_clock_fast(vcpu->kvm))
178 return ckc_interrupts_enabled(vcpu);
181 static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu)
183 return !psw_extint_disabled(vcpu) &&
184 (vcpu->arch.sie_block->gcr[0] & 0x400ul);
187 static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu)
189 if (!cpu_timer_interrupts_enabled(vcpu))
191 return kvm_s390_get_cpu_timer(vcpu) >> 63;
194 static inline int is_ioirq(unsigned long irq_type)
196 return ((irq_type >= IRQ_PEND_IO_ISC_0) &&
197 (irq_type <= IRQ_PEND_IO_ISC_7));
200 static uint64_t isc_to_isc_bits(int isc)
202 return (0x80 >> isc) << 24;
205 static inline u8 int_word_to_isc(u32 int_word)
207 return (int_word & 0x38000000) >> 27;
210 static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
212 return vcpu->kvm->arch.float_int.pending_irqs |
213 vcpu->arch.local_int.pending_irqs;
216 static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
217 unsigned long active_mask)
221 for (i = 0; i <= MAX_ISC; i++)
222 if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
223 active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i));
228 static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
230 unsigned long active_mask;
232 active_mask = pending_irqs(vcpu);
236 if (psw_extint_disabled(vcpu))
237 active_mask &= ~IRQ_PEND_EXT_MASK;
238 if (psw_ioint_disabled(vcpu))
239 active_mask &= ~IRQ_PEND_IO_MASK;
241 active_mask = disable_iscs(vcpu, active_mask);
242 if (!(vcpu->arch.sie_block->gcr[0] & 0x2000ul))
243 __clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask);
244 if (!(vcpu->arch.sie_block->gcr[0] & 0x4000ul))
245 __clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask);
246 if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
247 __clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask);
248 if (!(vcpu->arch.sie_block->gcr[0] & 0x400ul))
249 __clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask);
250 if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul))
251 __clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask);
252 if (psw_mchk_disabled(vcpu))
253 active_mask &= ~IRQ_PEND_MCHK_MASK;
254 if (!(vcpu->arch.sie_block->gcr[14] &
255 vcpu->kvm->arch.float_int.mchk.cr14))
256 __clear_bit(IRQ_PEND_MCHK_REP, &active_mask);
259 * STOP irqs will never be actively delivered. They are triggered via
260 * intercept requests and cleared when the stop intercept is performed.
262 __clear_bit(IRQ_PEND_SIGP_STOP, &active_mask);
267 static void __set_cpu_idle(struct kvm_vcpu *vcpu)
269 atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
270 set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
273 static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
275 atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
276 clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
279 static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
281 atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
282 &vcpu->arch.sie_block->cpuflags);
283 vcpu->arch.sie_block->lctl = 0x0000;
284 vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
286 if (guestdbg_enabled(vcpu)) {
287 vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
288 LCTL_CR10 | LCTL_CR11);
289 vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
293 static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
295 atomic_or(flag, &vcpu->arch.sie_block->cpuflags);
298 static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
300 if (!(pending_irqs(vcpu) & IRQ_PEND_IO_MASK))
302 else if (psw_ioint_disabled(vcpu))
303 __set_cpuflag(vcpu, CPUSTAT_IO_INT);
305 vcpu->arch.sie_block->lctl |= LCTL_CR6;
308 static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
310 if (!(pending_irqs(vcpu) & IRQ_PEND_EXT_MASK))
312 if (psw_extint_disabled(vcpu))
313 __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
315 vcpu->arch.sie_block->lctl |= LCTL_CR0;
318 static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
320 if (!(pending_irqs(vcpu) & IRQ_PEND_MCHK_MASK))
322 if (psw_mchk_disabled(vcpu))
323 vcpu->arch.sie_block->ictl |= ICTL_LPSW;
325 vcpu->arch.sie_block->lctl |= LCTL_CR14;
328 static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu)
330 if (kvm_s390_is_stop_irq_pending(vcpu))
331 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
334 /* Set interception request for non-deliverable interrupts */
335 static void set_intercept_indicators(struct kvm_vcpu *vcpu)
337 set_intercept_indicators_io(vcpu);
338 set_intercept_indicators_ext(vcpu);
339 set_intercept_indicators_mchk(vcpu);
340 set_intercept_indicators_stop(vcpu);
343 static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
345 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
348 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
351 rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
352 (u16 *)__LC_EXT_INT_CODE);
353 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
354 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
355 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
356 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
357 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
358 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
359 return rc ? -EFAULT : 0;
362 static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
364 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
367 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
370 rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP,
371 (u16 __user *)__LC_EXT_INT_CODE);
372 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
373 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
374 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
375 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
376 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
377 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
378 return rc ? -EFAULT : 0;
381 static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu)
383 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
384 struct kvm_s390_ext_info ext;
387 spin_lock(&li->lock);
389 clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
390 li->irq.ext.ext_params2 = 0;
391 spin_unlock(&li->lock);
393 VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx",
395 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
396 KVM_S390_INT_PFAULT_INIT,
399 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE);
400 rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR);
401 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
402 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
403 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
404 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
405 rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2);
406 return rc ? -EFAULT : 0;
409 static int __write_machine_check(struct kvm_vcpu *vcpu,
410 struct kvm_s390_mchk_info *mchk)
412 unsigned long ext_sa_addr;
414 freg_t fprs[NUM_FPRS];
418 mci.val = mchk->mcic;
419 /* take care of lazy register loading */
421 save_access_regs(vcpu->run->s.regs.acrs);
422 if (MACHINE_HAS_GS && vcpu->arch.gs_enabled)
423 save_gs_cb(current->thread.gs_cb);
425 /* Extended save area */
426 rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,
427 sizeof(unsigned long));
428 /* Only bits 0 through 63-LC are used for address formation */
429 lc = ext_sa_addr & MCESA_LC_MASK;
430 if (test_kvm_facility(vcpu->kvm, 133)) {
434 ext_sa_addr &= ~0x3ffUL;
437 ext_sa_addr &= ~0x7ffUL;
440 ext_sa_addr &= ~0xfffUL;
447 ext_sa_addr &= ~0x3ffUL;
450 if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
451 if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
457 if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133)
458 && (lc == 11 || lc == 12)) {
459 if (write_guest_abs(vcpu, ext_sa_addr + 1024,
460 &vcpu->run->s.regs.gscb, 32))
466 /* General interruption information */
467 rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
468 rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
469 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
470 rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
471 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
472 rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);
474 /* Register-save areas */
475 if (MACHINE_HAS_VX) {
476 convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
477 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
479 rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA,
480 vcpu->run->s.regs.fprs, 128);
482 rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA,
483 vcpu->run->s.regs.gprs, 128);
484 rc |= put_guest_lc(vcpu, current->thread.fpu.fpc,
485 (u32 __user *) __LC_FP_CREG_SAVE_AREA);
486 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr,
487 (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA);
488 rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu),
489 (u64 __user *) __LC_CPU_TIMER_SAVE_AREA);
490 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8,
491 (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA);
492 rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA,
493 &vcpu->run->s.regs.acrs, 64);
494 rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA,
495 &vcpu->arch.sie_block->gcr, 128);
497 /* Extended interruption information */
498 rc |= put_guest_lc(vcpu, mchk->ext_damage_code,
499 (u32 __user *) __LC_EXT_DAMAGE_CODE);
500 rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
501 (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
502 rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout,
503 sizeof(mchk->fixed_logout));
504 return rc ? -EFAULT : 0;
507 static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
509 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
510 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
511 struct kvm_s390_mchk_info mchk = {};
515 spin_lock(&fi->lock);
516 spin_lock(&li->lock);
517 if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
518 test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
520 * If there was an exigent machine check pending, then any
521 * repressible machine checks that might have been pending
522 * are indicated along with it, so always clear bits for
523 * repressible and exigent interrupts
526 clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
527 clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
528 memset(&li->irq.mchk, 0, sizeof(mchk));
532 * We indicate floating repressible conditions along with
533 * other pending conditions. Channel Report Pending and Channel
534 * Subsystem damage are the only two and and are indicated by
535 * bits in mcic and masked in cr14.
537 if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
538 mchk.mcic |= fi->mchk.mcic;
539 mchk.cr14 |= fi->mchk.cr14;
540 memset(&fi->mchk, 0, sizeof(mchk));
543 spin_unlock(&li->lock);
544 spin_unlock(&fi->lock);
547 VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx",
549 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
551 mchk.cr14, mchk.mcic);
552 rc = __write_machine_check(vcpu, &mchk);
557 static int __must_check __deliver_restart(struct kvm_vcpu *vcpu)
559 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
562 VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart");
563 vcpu->stat.deliver_restart_signal++;
564 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
566 rc = write_guest_lc(vcpu,
567 offsetof(struct lowcore, restart_old_psw),
568 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
569 rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw),
570 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
571 clear_bit(IRQ_PEND_RESTART, &li->pending_irqs);
572 return rc ? -EFAULT : 0;
575 static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu)
577 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
578 struct kvm_s390_prefix_info prefix;
580 spin_lock(&li->lock);
581 prefix = li->irq.prefix;
582 li->irq.prefix.address = 0;
583 clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
584 spin_unlock(&li->lock);
586 vcpu->stat.deliver_prefix_signal++;
587 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
588 KVM_S390_SIGP_SET_PREFIX,
591 kvm_s390_set_prefix(vcpu, prefix.address);
595 static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu)
597 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
601 spin_lock(&li->lock);
602 cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS);
603 clear_bit(cpu_addr, li->sigp_emerg_pending);
604 if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS))
605 clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
606 spin_unlock(&li->lock);
608 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg");
609 vcpu->stat.deliver_emergency_signal++;
610 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
613 rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG,
614 (u16 *)__LC_EXT_INT_CODE);
615 rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR);
616 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
617 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
618 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
619 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
620 return rc ? -EFAULT : 0;
623 static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu)
625 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
626 struct kvm_s390_extcall_info extcall;
629 spin_lock(&li->lock);
630 extcall = li->irq.extcall;
631 li->irq.extcall.code = 0;
632 clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
633 spin_unlock(&li->lock);
635 VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call");
636 vcpu->stat.deliver_external_call++;
637 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
638 KVM_S390_INT_EXTERNAL_CALL,
641 rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL,
642 (u16 *)__LC_EXT_INT_CODE);
643 rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR);
644 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
645 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
646 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw,
648 return rc ? -EFAULT : 0;
651 static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
653 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
654 struct kvm_s390_pgm_info pgm_info;
655 int rc = 0, nullifying = false;
658 spin_lock(&li->lock);
659 pgm_info = li->irq.pgm;
660 clear_bit(IRQ_PEND_PROG, &li->pending_irqs);
661 memset(&li->irq.pgm, 0, sizeof(pgm_info));
662 spin_unlock(&li->lock);
664 ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
665 VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
666 pgm_info.code, ilen);
667 vcpu->stat.deliver_program_int++;
668 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
671 switch (pgm_info.code & ~PGM_PER) {
672 case PGM_AFX_TRANSLATION:
673 case PGM_ASX_TRANSLATION:
674 case PGM_EX_TRANSLATION:
675 case PGM_LFX_TRANSLATION:
676 case PGM_LSTE_SEQUENCE:
677 case PGM_LSX_TRANSLATION:
678 case PGM_LX_TRANSLATION:
679 case PGM_PRIMARY_AUTHORITY:
680 case PGM_SECONDARY_AUTHORITY:
683 case PGM_SPACE_SWITCH:
684 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
685 (u64 *)__LC_TRANS_EXC_CODE);
687 case PGM_ALEN_TRANSLATION:
688 case PGM_ALE_SEQUENCE:
689 case PGM_ASTE_INSTANCE:
690 case PGM_ASTE_SEQUENCE:
691 case PGM_ASTE_VALIDITY:
692 case PGM_EXTENDED_AUTHORITY:
693 rc = put_guest_lc(vcpu, pgm_info.exc_access_id,
694 (u8 *)__LC_EXC_ACCESS_ID);
698 case PGM_PAGE_TRANSLATION:
699 case PGM_REGION_FIRST_TRANS:
700 case PGM_REGION_SECOND_TRANS:
701 case PGM_REGION_THIRD_TRANS:
702 case PGM_SEGMENT_TRANSLATION:
703 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
704 (u64 *)__LC_TRANS_EXC_CODE);
705 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
706 (u8 *)__LC_EXC_ACCESS_ID);
707 rc |= put_guest_lc(vcpu, pgm_info.op_access_id,
708 (u8 *)__LC_OP_ACCESS_ID);
712 rc = put_guest_lc(vcpu, pgm_info.mon_class_nr,
713 (u16 *)__LC_MON_CLASS_NR);
714 rc |= put_guest_lc(vcpu, pgm_info.mon_code,
715 (u64 *)__LC_MON_CODE);
717 case PGM_VECTOR_PROCESSING:
719 rc = put_guest_lc(vcpu, pgm_info.data_exc_code,
720 (u32 *)__LC_DATA_EXC_CODE);
723 rc = put_guest_lc(vcpu, pgm_info.trans_exc_code,
724 (u64 *)__LC_TRANS_EXC_CODE);
725 rc |= put_guest_lc(vcpu, pgm_info.exc_access_id,
726 (u8 *)__LC_EXC_ACCESS_ID);
729 case PGM_STACK_EMPTY:
730 case PGM_STACK_SPECIFICATION:
732 case PGM_STACK_OPERATION:
733 case PGM_TRACE_TABEL:
734 case PGM_CRYPTO_OPERATION:
739 if (pgm_info.code & PGM_PER) {
740 rc |= put_guest_lc(vcpu, pgm_info.per_code,
741 (u8 *) __LC_PER_CODE);
742 rc |= put_guest_lc(vcpu, pgm_info.per_atmid,
743 (u8 *)__LC_PER_ATMID);
744 rc |= put_guest_lc(vcpu, pgm_info.per_address,
745 (u64 *) __LC_PER_ADDRESS);
746 rc |= put_guest_lc(vcpu, pgm_info.per_access_id,
747 (u8 *) __LC_PER_ACCESS_ID);
750 if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND))
751 kvm_s390_rewind_psw(vcpu, ilen);
753 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
754 rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC);
755 rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea,
756 (u64 *) __LC_LAST_BREAK);
757 rc |= put_guest_lc(vcpu, pgm_info.code,
758 (u16 *)__LC_PGM_INT_CODE);
759 rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
760 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
761 rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
762 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
763 return rc ? -EFAULT : 0;
766 static int __must_check __deliver_service(struct kvm_vcpu *vcpu)
768 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
769 struct kvm_s390_ext_info ext;
772 spin_lock(&fi->lock);
773 if (!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) {
774 spin_unlock(&fi->lock);
777 ext = fi->srv_signal;
778 memset(&fi->srv_signal, 0, sizeof(ext));
779 clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
780 spin_unlock(&fi->lock);
782 VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x",
784 vcpu->stat.deliver_service_signal++;
785 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE,
788 rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE);
789 rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR);
790 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
791 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
792 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
793 &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
794 rc |= put_guest_lc(vcpu, ext.ext_params,
795 (u32 *)__LC_EXT_PARAMS);
797 return rc ? -EFAULT : 0;
800 static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu)
802 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
803 struct kvm_s390_interrupt_info *inti;
806 spin_lock(&fi->lock);
807 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT],
808 struct kvm_s390_interrupt_info,
811 list_del(&inti->list);
812 fi->counters[FIRQ_CNTR_PFAULT] -= 1;
814 if (list_empty(&fi->lists[FIRQ_LIST_PFAULT]))
815 clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
816 spin_unlock(&fi->lock);
819 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
820 KVM_S390_INT_PFAULT_DONE, 0,
821 inti->ext.ext_params2);
822 VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx",
823 inti->ext.ext_params2);
825 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
826 (u16 *)__LC_EXT_INT_CODE);
827 rc |= put_guest_lc(vcpu, PFAULT_DONE,
828 (u16 *)__LC_EXT_CPU_ADDR);
829 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
830 &vcpu->arch.sie_block->gpsw,
832 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
833 &vcpu->arch.sie_block->gpsw,
835 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
836 (u64 *)__LC_EXT_PARAMS2);
839 return rc ? -EFAULT : 0;
842 static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
844 struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
845 struct kvm_s390_interrupt_info *inti;
848 spin_lock(&fi->lock);
849 inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO],
850 struct kvm_s390_interrupt_info,
854 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
855 inti->ext.ext_params, inti->ext.ext_params2);
856 vcpu->stat.deliver_virtio_interrupt++;
857 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
859 inti->ext.ext_params,
860 inti->ext.ext_params2);
861 list_del(&inti->list);
862 fi->counters[FIRQ_CNTR_VIRTIO] -= 1;
864 if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO]))
865 clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
866 spin_unlock(&fi->lock);
869 rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE,
870 (u16 *)__LC_EXT_INT_CODE);
871 rc |= put_guest_lc(vcpu, VIRTIO_PARAM,
872 (u16 *)__LC_EXT_CPU_ADDR);
873 rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
874 &vcpu->arch.sie_block->gpsw,
876 rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
877 &vcpu->arch.sie_block->gpsw,
879 rc |= put_guest_lc(vcpu, inti->ext.ext_params,
880 (u32 *)__LC_EXT_PARAMS);
881 rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
882 (u64 *)__LC_EXT_PARAMS2);
885 return rc ? -EFAULT : 0;
888 static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
889 unsigned long irq_type)
891 struct list_head *isc_list;
892 struct kvm_s390_float_interrupt *fi;
893 struct kvm_s390_interrupt_info *inti = NULL;
896 fi = &vcpu->kvm->arch.float_int;
898 spin_lock(&fi->lock);
899 isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0];
900 inti = list_first_entry_or_null(isc_list,
901 struct kvm_s390_interrupt_info,
904 if (inti->type & KVM_S390_INT_IO_AI_MASK)
905 VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)");
907 VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x",
908 inti->io.subchannel_id >> 8,
909 inti->io.subchannel_id >> 1 & 0x3,
910 inti->io.subchannel_nr);
912 vcpu->stat.deliver_io_int++;
913 trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
915 ((__u32)inti->io.subchannel_id << 16) |
916 inti->io.subchannel_nr,
917 ((__u64)inti->io.io_int_parm << 32) |
918 inti->io.io_int_word);
919 list_del(&inti->list);
920 fi->counters[FIRQ_CNTR_IO] -= 1;
922 if (list_empty(isc_list))
923 clear_bit(irq_type, &fi->pending_irqs);
924 spin_unlock(&fi->lock);
927 rc = put_guest_lc(vcpu, inti->io.subchannel_id,
928 (u16 *)__LC_SUBCHANNEL_ID);
929 rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
930 (u16 *)__LC_SUBCHANNEL_NR);
931 rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
932 (u32 *)__LC_IO_INT_PARM);
933 rc |= put_guest_lc(vcpu, inti->io.io_int_word,
934 (u32 *)__LC_IO_INT_WORD);
935 rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
936 &vcpu->arch.sie_block->gpsw,
938 rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
939 &vcpu->arch.sie_block->gpsw,
944 return rc ? -EFAULT : 0;
947 typedef int (*deliver_irq_t)(struct kvm_vcpu *vcpu);
949 static const deliver_irq_t deliver_irq_funcs[] = {
950 [IRQ_PEND_MCHK_EX] = __deliver_machine_check,
951 [IRQ_PEND_MCHK_REP] = __deliver_machine_check,
952 [IRQ_PEND_PROG] = __deliver_prog,
953 [IRQ_PEND_EXT_EMERGENCY] = __deliver_emergency_signal,
954 [IRQ_PEND_EXT_EXTERNAL] = __deliver_external_call,
955 [IRQ_PEND_EXT_CLOCK_COMP] = __deliver_ckc,
956 [IRQ_PEND_EXT_CPU_TIMER] = __deliver_cpu_timer,
957 [IRQ_PEND_RESTART] = __deliver_restart,
958 [IRQ_PEND_SET_PREFIX] = __deliver_set_prefix,
959 [IRQ_PEND_PFAULT_INIT] = __deliver_pfault_init,
960 [IRQ_PEND_EXT_SERVICE] = __deliver_service,
961 [IRQ_PEND_PFAULT_DONE] = __deliver_pfault_done,
962 [IRQ_PEND_VIRTIO] = __deliver_virtio,
965 /* Check whether an external call is pending (deliverable or not) */
966 int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
968 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
970 if (!sclp.has_sigpif)
971 return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
973 return sca_ext_call_pending(vcpu, NULL);
976 int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop)
978 if (deliverable_irqs(vcpu))
981 if (kvm_cpu_has_pending_timer(vcpu))
984 /* external call pending and deliverable */
985 if (kvm_s390_ext_call_pending(vcpu) &&
986 !psw_extint_disabled(vcpu) &&
987 (vcpu->arch.sie_block->gcr[0] & 0x2000ul))
990 if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu))
995 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
997 return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu);
1000 static u64 __calculate_sltime(struct kvm_vcpu *vcpu)
1002 u64 now, cputm, sltime = 0;
1004 if (ckc_interrupts_enabled(vcpu)) {
1005 now = kvm_s390_get_tod_clock_fast(vcpu->kvm);
1006 sltime = tod_to_ns(vcpu->arch.sie_block->ckc - now);
1007 /* already expired or overflow? */
1008 if (!sltime || vcpu->arch.sie_block->ckc <= now)
1010 if (cpu_timer_interrupts_enabled(vcpu)) {
1011 cputm = kvm_s390_get_cpu_timer(vcpu);
1012 /* already expired? */
1015 return min(sltime, tod_to_ns(cputm));
1017 } else if (cpu_timer_interrupts_enabled(vcpu)) {
1018 sltime = kvm_s390_get_cpu_timer(vcpu);
1019 /* already expired? */
1026 int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
1030 vcpu->stat.exit_wait_state++;
1033 if (kvm_arch_vcpu_runnable(vcpu))
1036 if (psw_interrupts_disabled(vcpu)) {
1037 VCPU_EVENT(vcpu, 3, "%s", "disabled wait");
1038 return -EOPNOTSUPP; /* disabled wait */
1041 if (!ckc_interrupts_enabled(vcpu) &&
1042 !cpu_timer_interrupts_enabled(vcpu)) {
1043 VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
1044 __set_cpu_idle(vcpu);
1048 sltime = __calculate_sltime(vcpu);
1052 __set_cpu_idle(vcpu);
1053 hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL);
1054 VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime);
1056 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
1057 kvm_vcpu_block(vcpu);
1058 __unset_cpu_idle(vcpu);
1059 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1061 hrtimer_cancel(&vcpu->arch.ckc_timer);
1065 void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
1068 * We cannot move this into the if, as the CPU might be already
1069 * in kvm_vcpu_block without having the waitqueue set (polling)
1071 vcpu->valid_wakeup = true;
1072 if (swait_active(&vcpu->wq)) {
1074 * The vcpu gave up the cpu voluntarily, mark it as a good
1077 vcpu->preempted = true;
1078 swake_up(&vcpu->wq);
1079 vcpu->stat.halt_wakeup++;
1082 * The VCPU might not be sleeping but is executing the VSIE. Let's
1083 * kick it, so it leaves the SIE to process the request.
1085 kvm_s390_vsie_kick(vcpu);
1088 enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer)
1090 struct kvm_vcpu *vcpu;
1093 vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer);
1094 sltime = __calculate_sltime(vcpu);
1097 * If the monotonic clock runs faster than the tod clock we might be
1098 * woken up too early and have to go back to sleep to avoid deadlocks.
1100 if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime)))
1101 return HRTIMER_RESTART;
1102 kvm_s390_vcpu_wakeup(vcpu);
1103 return HRTIMER_NORESTART;
1106 void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
1108 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1110 spin_lock(&li->lock);
1111 li->pending_irqs = 0;
1112 bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS);
1113 memset(&li->irq, 0, sizeof(li->irq));
1114 spin_unlock(&li->lock);
1116 sca_clear_ext_call(vcpu);
1119 int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
1121 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1124 unsigned long irq_type;
1127 __reset_intercept_indicators(vcpu);
1129 /* pending ckc conditions might have been invalidated */
1130 clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1131 if (ckc_irq_pending(vcpu))
1132 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1134 /* pending cpu timer conditions might have been invalidated */
1135 clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1136 if (cpu_timer_irq_pending(vcpu))
1137 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1139 while ((irqs = deliverable_irqs(vcpu)) && !rc) {
1140 /* bits are in the order of interrupt priority */
1141 irq_type = find_first_bit(&irqs, IRQ_PEND_COUNT);
1142 if (is_ioirq(irq_type)) {
1143 rc = __deliver_io(vcpu, irq_type);
1145 func = deliver_irq_funcs[irq_type];
1147 WARN_ON_ONCE(func == NULL);
1148 clear_bit(irq_type, &li->pending_irqs);
1155 set_intercept_indicators(vcpu);
1160 static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1162 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1164 VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
1165 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
1166 irq->u.pgm.code, 0);
1168 if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) {
1169 /* auto detection if no valid ILC was given */
1170 irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK;
1171 irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu);
1172 irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID;
1175 if (irq->u.pgm.code == PGM_PER) {
1176 li->irq.pgm.code |= PGM_PER;
1177 li->irq.pgm.flags = irq->u.pgm.flags;
1178 /* only modify PER related information */
1179 li->irq.pgm.per_address = irq->u.pgm.per_address;
1180 li->irq.pgm.per_code = irq->u.pgm.per_code;
1181 li->irq.pgm.per_atmid = irq->u.pgm.per_atmid;
1182 li->irq.pgm.per_access_id = irq->u.pgm.per_access_id;
1183 } else if (!(irq->u.pgm.code & PGM_PER)) {
1184 li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) |
1186 li->irq.pgm.flags = irq->u.pgm.flags;
1187 /* only modify non-PER information */
1188 li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code;
1189 li->irq.pgm.mon_code = irq->u.pgm.mon_code;
1190 li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code;
1191 li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr;
1192 li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id;
1193 li->irq.pgm.op_access_id = irq->u.pgm.op_access_id;
1195 li->irq.pgm = irq->u.pgm;
1197 set_bit(IRQ_PEND_PROG, &li->pending_irqs);
1201 static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1203 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1205 VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
1206 irq->u.ext.ext_params2);
1207 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
1208 irq->u.ext.ext_params,
1209 irq->u.ext.ext_params2);
1211 li->irq.ext = irq->u.ext;
1212 set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
1213 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1217 static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1219 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1220 struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
1221 uint16_t src_id = irq->u.extcall.code;
1223 VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
1225 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
1228 /* sending vcpu invalid */
1229 if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL)
1232 if (sclp.has_sigpif)
1233 return sca_inject_ext_call(vcpu, src_id);
1235 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
1237 *extcall = irq->u.extcall;
1238 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1242 static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1244 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1245 struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
1247 VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
1248 irq->u.prefix.address);
1249 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
1250 irq->u.prefix.address, 0);
1252 if (!is_vcpu_stopped(vcpu))
1255 *prefix = irq->u.prefix;
1256 set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs);
1260 #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
1261 static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1263 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1264 struct kvm_s390_stop_info *stop = &li->irq.stop;
1267 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
1269 if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
1272 if (is_vcpu_stopped(vcpu)) {
1273 if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS)
1274 rc = kvm_s390_store_status_unloaded(vcpu,
1275 KVM_S390_STORE_STATUS_NOADDR);
1279 if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs))
1281 stop->flags = irq->u.stop.flags;
1282 __set_cpuflag(vcpu, CPUSTAT_STOP_INT);
1286 static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
1287 struct kvm_s390_irq *irq)
1289 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1291 VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
1292 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
1294 set_bit(IRQ_PEND_RESTART, &li->pending_irqs);
1298 static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
1299 struct kvm_s390_irq *irq)
1301 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1303 VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
1305 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
1306 irq->u.emerg.code, 0);
1308 /* sending vcpu invalid */
1309 if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL)
1312 set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
1313 set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
1314 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1318 static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1320 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1321 struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
1323 VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
1325 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
1329 * Because repressible machine checks can be indicated along with
1330 * exigent machine checks (PoP, Chapter 11, Interruption action)
1331 * we need to combine cr14, mcic and external damage code.
1332 * Failing storage address and the logout area should not be or'ed
1333 * together, we just indicate the last occurrence of the corresponding
1336 mchk->cr14 |= irq->u.mchk.cr14;
1337 mchk->mcic |= irq->u.mchk.mcic;
1338 mchk->ext_damage_code |= irq->u.mchk.ext_damage_code;
1339 mchk->failing_storage_address = irq->u.mchk.failing_storage_address;
1340 memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout,
1341 sizeof(mchk->fixed_logout));
1342 if (mchk->mcic & MCHK_EX_MASK)
1343 set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
1344 else if (mchk->mcic & MCHK_REP_MASK)
1345 set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs);
1349 static int __inject_ckc(struct kvm_vcpu *vcpu)
1351 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1353 VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
1354 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
1357 set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
1358 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1362 static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
1364 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1366 VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
1367 trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
1370 set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
1371 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1375 static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
1378 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1379 struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1380 struct kvm_s390_interrupt_info *iter;
1381 u16 id = (schid & 0xffff0000U) >> 16;
1382 u16 nr = schid & 0x0000ffffU;
1384 spin_lock(&fi->lock);
1385 list_for_each_entry(iter, isc_list, list) {
1386 if (schid && (id != iter->io.subchannel_id ||
1387 nr != iter->io.subchannel_nr))
1389 /* found an appropriate entry */
1390 list_del_init(&iter->list);
1391 fi->counters[FIRQ_CNTR_IO] -= 1;
1392 if (list_empty(isc_list))
1393 clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
1394 spin_unlock(&fi->lock);
1397 spin_unlock(&fi->lock);
1402 * Dequeue and return an I/O interrupt matching any of the interruption
1403 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
1405 struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
1406 u64 isc_mask, u32 schid)
1408 struct kvm_s390_interrupt_info *inti = NULL;
1411 for (isc = 0; isc <= MAX_ISC && !inti; isc++) {
1412 if (isc_mask & isc_to_isc_bits(isc))
1413 inti = get_io_int(kvm, isc, schid);
1418 #define SCCB_MASK 0xFFFFFFF8
1419 #define SCCB_EVENT_PENDING 0x3
1421 static int __inject_service(struct kvm *kvm,
1422 struct kvm_s390_interrupt_info *inti)
1424 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1426 spin_lock(&fi->lock);
1427 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
1429 * Early versions of the QEMU s390 bios will inject several
1430 * service interrupts after another without handling a
1431 * condition code indicating busy.
1432 * We will silently ignore those superfluous sccb values.
1433 * A future version of QEMU will take care of serialization
1436 if (fi->srv_signal.ext_params & SCCB_MASK)
1438 fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK;
1439 set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
1441 spin_unlock(&fi->lock);
1446 static int __inject_virtio(struct kvm *kvm,
1447 struct kvm_s390_interrupt_info *inti)
1449 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1451 spin_lock(&fi->lock);
1452 if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
1453 spin_unlock(&fi->lock);
1456 fi->counters[FIRQ_CNTR_VIRTIO] += 1;
1457 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]);
1458 set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs);
1459 spin_unlock(&fi->lock);
1463 static int __inject_pfault_done(struct kvm *kvm,
1464 struct kvm_s390_interrupt_info *inti)
1466 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1468 spin_lock(&fi->lock);
1469 if (fi->counters[FIRQ_CNTR_PFAULT] >=
1470 (ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
1471 spin_unlock(&fi->lock);
1474 fi->counters[FIRQ_CNTR_PFAULT] += 1;
1475 list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]);
1476 set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs);
1477 spin_unlock(&fi->lock);
1481 #define CR_PENDING_SUBCLASS 28
1482 static int __inject_float_mchk(struct kvm *kvm,
1483 struct kvm_s390_interrupt_info *inti)
1485 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1487 spin_lock(&fi->lock);
1488 fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
1489 fi->mchk.mcic |= inti->mchk.mcic;
1490 set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs);
1491 spin_unlock(&fi->lock);
1496 static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1498 struct kvm_s390_float_interrupt *fi;
1499 struct list_head *list;
1502 fi = &kvm->arch.float_int;
1503 spin_lock(&fi->lock);
1504 if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) {
1505 spin_unlock(&fi->lock);
1508 fi->counters[FIRQ_CNTR_IO] += 1;
1510 if (inti->type & KVM_S390_INT_IO_AI_MASK)
1511 VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)");
1513 VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x",
1514 inti->io.subchannel_id >> 8,
1515 inti->io.subchannel_id >> 1 & 0x3,
1516 inti->io.subchannel_nr);
1517 isc = int_word_to_isc(inti->io.io_int_word);
1518 list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
1519 list_add_tail(&inti->list, list);
1520 set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
1521 spin_unlock(&fi->lock);
1526 * Find a destination VCPU for a floating irq and kick it.
1528 static void __floating_irq_kick(struct kvm *kvm, u64 type)
1530 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1531 struct kvm_s390_local_interrupt *li;
1532 struct kvm_vcpu *dst_vcpu;
1533 int sigcpu, online_vcpus, nr_tries = 0;
1535 online_vcpus = atomic_read(&kvm->online_vcpus);
1539 /* find idle VCPUs first, then round robin */
1540 sigcpu = find_first_bit(fi->idle_mask, online_vcpus);
1541 if (sigcpu == online_vcpus) {
1543 sigcpu = fi->next_rr_cpu;
1544 fi->next_rr_cpu = (fi->next_rr_cpu + 1) % online_vcpus;
1545 /* avoid endless loops if all vcpus are stopped */
1546 if (nr_tries++ >= online_vcpus)
1548 } while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu)));
1550 dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
1552 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
1553 li = &dst_vcpu->arch.local_int;
1554 spin_lock(&li->lock);
1557 atomic_or(CPUSTAT_STOP_INT, li->cpuflags);
1559 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1560 atomic_or(CPUSTAT_IO_INT, li->cpuflags);
1563 atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
1566 spin_unlock(&li->lock);
1567 kvm_s390_vcpu_wakeup(dst_vcpu);
1570 static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
1572 u64 type = READ_ONCE(inti->type);
1577 rc = __inject_float_mchk(kvm, inti);
1579 case KVM_S390_INT_VIRTIO:
1580 rc = __inject_virtio(kvm, inti);
1582 case KVM_S390_INT_SERVICE:
1583 rc = __inject_service(kvm, inti);
1585 case KVM_S390_INT_PFAULT_DONE:
1586 rc = __inject_pfault_done(kvm, inti);
1588 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1589 rc = __inject_io(kvm, inti);
1597 __floating_irq_kick(kvm, type);
1601 int kvm_s390_inject_vm(struct kvm *kvm,
1602 struct kvm_s390_interrupt *s390int)
1604 struct kvm_s390_interrupt_info *inti;
1607 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1611 inti->type = s390int->type;
1612 switch (inti->type) {
1613 case KVM_S390_INT_VIRTIO:
1614 VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx",
1615 s390int->parm, s390int->parm64);
1616 inti->ext.ext_params = s390int->parm;
1617 inti->ext.ext_params2 = s390int->parm64;
1619 case KVM_S390_INT_SERVICE:
1620 VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm);
1621 inti->ext.ext_params = s390int->parm;
1623 case KVM_S390_INT_PFAULT_DONE:
1624 inti->ext.ext_params2 = s390int->parm64;
1627 VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx",
1629 inti->mchk.cr14 = s390int->parm; /* upper bits are not used */
1630 inti->mchk.mcic = s390int->parm64;
1632 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1633 inti->io.subchannel_id = s390int->parm >> 16;
1634 inti->io.subchannel_nr = s390int->parm & 0x0000ffffu;
1635 inti->io.io_int_parm = s390int->parm64 >> 32;
1636 inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull;
1642 trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64,
1645 rc = __inject_vm(kvm, inti);
1651 int kvm_s390_reinject_io_int(struct kvm *kvm,
1652 struct kvm_s390_interrupt_info *inti)
1654 return __inject_vm(kvm, inti);
1657 int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
1658 struct kvm_s390_irq *irq)
1660 irq->type = s390int->type;
1661 switch (irq->type) {
1662 case KVM_S390_PROGRAM_INT:
1663 if (s390int->parm & 0xffff0000)
1665 irq->u.pgm.code = s390int->parm;
1667 case KVM_S390_SIGP_SET_PREFIX:
1668 irq->u.prefix.address = s390int->parm;
1670 case KVM_S390_SIGP_STOP:
1671 irq->u.stop.flags = s390int->parm;
1673 case KVM_S390_INT_EXTERNAL_CALL:
1674 if (s390int->parm & 0xffff0000)
1676 irq->u.extcall.code = s390int->parm;
1678 case KVM_S390_INT_EMERGENCY:
1679 if (s390int->parm & 0xffff0000)
1681 irq->u.emerg.code = s390int->parm;
1684 irq->u.mchk.mcic = s390int->parm64;
1690 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu)
1692 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1694 return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1697 void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu)
1699 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1701 spin_lock(&li->lock);
1702 li->irq.stop.flags = 0;
1703 clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs);
1704 spin_unlock(&li->lock);
1707 static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1711 switch (irq->type) {
1712 case KVM_S390_PROGRAM_INT:
1713 rc = __inject_prog(vcpu, irq);
1715 case KVM_S390_SIGP_SET_PREFIX:
1716 rc = __inject_set_prefix(vcpu, irq);
1718 case KVM_S390_SIGP_STOP:
1719 rc = __inject_sigp_stop(vcpu, irq);
1721 case KVM_S390_RESTART:
1722 rc = __inject_sigp_restart(vcpu, irq);
1724 case KVM_S390_INT_CLOCK_COMP:
1725 rc = __inject_ckc(vcpu);
1727 case KVM_S390_INT_CPU_TIMER:
1728 rc = __inject_cpu_timer(vcpu);
1730 case KVM_S390_INT_EXTERNAL_CALL:
1731 rc = __inject_extcall(vcpu, irq);
1733 case KVM_S390_INT_EMERGENCY:
1734 rc = __inject_sigp_emergency(vcpu, irq);
1737 rc = __inject_mchk(vcpu, irq);
1739 case KVM_S390_INT_PFAULT_INIT:
1740 rc = __inject_pfault_init(vcpu, irq);
1742 case KVM_S390_INT_VIRTIO:
1743 case KVM_S390_INT_SERVICE:
1744 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1752 int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
1754 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
1757 spin_lock(&li->lock);
1758 rc = do_inject_vcpu(vcpu, irq);
1759 spin_unlock(&li->lock);
1761 kvm_s390_vcpu_wakeup(vcpu);
1765 static inline void clear_irq_list(struct list_head *_list)
1767 struct kvm_s390_interrupt_info *inti, *n;
1769 list_for_each_entry_safe(inti, n, _list, list) {
1770 list_del(&inti->list);
1775 static void inti_to_irq(struct kvm_s390_interrupt_info *inti,
1776 struct kvm_s390_irq *irq)
1778 irq->type = inti->type;
1779 switch (inti->type) {
1780 case KVM_S390_INT_PFAULT_INIT:
1781 case KVM_S390_INT_PFAULT_DONE:
1782 case KVM_S390_INT_VIRTIO:
1783 irq->u.ext = inti->ext;
1785 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1786 irq->u.io = inti->io;
1791 void kvm_s390_clear_float_irqs(struct kvm *kvm)
1793 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
1796 spin_lock(&fi->lock);
1797 fi->pending_irqs = 0;
1798 memset(&fi->srv_signal, 0, sizeof(fi->srv_signal));
1799 memset(&fi->mchk, 0, sizeof(fi->mchk));
1800 for (i = 0; i < FIRQ_LIST_COUNT; i++)
1801 clear_irq_list(&fi->lists[i]);
1802 for (i = 0; i < FIRQ_MAX_COUNT; i++)
1803 fi->counters[i] = 0;
1804 spin_unlock(&fi->lock);
1807 static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len)
1809 struct kvm_s390_interrupt_info *inti;
1810 struct kvm_s390_float_interrupt *fi;
1811 struct kvm_s390_irq *buf;
1812 struct kvm_s390_irq *irq;
1818 if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0)
1822 * We are already using -ENOMEM to signal
1823 * userspace it may retry with a bigger buffer,
1824 * so we need to use something else for this case
1830 max_irqs = len / sizeof(struct kvm_s390_irq);
1832 fi = &kvm->arch.float_int;
1833 spin_lock(&fi->lock);
1834 for (i = 0; i < FIRQ_LIST_COUNT; i++) {
1835 list_for_each_entry(inti, &fi->lists[i], list) {
1836 if (n == max_irqs) {
1837 /* signal userspace to try again */
1841 inti_to_irq(inti, &buf[n]);
1845 if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs)) {
1846 if (n == max_irqs) {
1847 /* signal userspace to try again */
1851 irq = (struct kvm_s390_irq *) &buf[n];
1852 irq->type = KVM_S390_INT_SERVICE;
1853 irq->u.ext = fi->srv_signal;
1856 if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) {
1857 if (n == max_irqs) {
1858 /* signal userspace to try again */
1862 irq = (struct kvm_s390_irq *) &buf[n];
1863 irq->type = KVM_S390_MCHK;
1864 irq->u.mchk = fi->mchk;
1869 spin_unlock(&fi->lock);
1870 if (!ret && n > 0) {
1871 if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n))
1876 return ret < 0 ? ret : n;
1879 static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
1883 switch (attr->group) {
1884 case KVM_DEV_FLIC_GET_ALL_IRQS:
1885 r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr,
1895 static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti,
1898 struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr;
1899 void *target = NULL;
1900 void __user *source;
1903 if (get_user(inti->type, (u64 __user *)addr))
1906 switch (inti->type) {
1907 case KVM_S390_INT_PFAULT_INIT:
1908 case KVM_S390_INT_PFAULT_DONE:
1909 case KVM_S390_INT_VIRTIO:
1910 case KVM_S390_INT_SERVICE:
1911 target = (void *) &inti->ext;
1912 source = &uptr->u.ext;
1913 size = sizeof(inti->ext);
1915 case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
1916 target = (void *) &inti->io;
1917 source = &uptr->u.io;
1918 size = sizeof(inti->io);
1921 target = (void *) &inti->mchk;
1922 source = &uptr->u.mchk;
1923 size = sizeof(inti->mchk);
1929 if (copy_from_user(target, source, size))
1935 static int enqueue_floating_irq(struct kvm_device *dev,
1936 struct kvm_device_attr *attr)
1938 struct kvm_s390_interrupt_info *inti = NULL;
1940 int len = attr->attr;
1942 if (len % sizeof(struct kvm_s390_irq) != 0)
1944 else if (len > KVM_S390_FLIC_MAX_BUFFER)
1947 while (len >= sizeof(struct kvm_s390_irq)) {
1948 inti = kzalloc(sizeof(*inti), GFP_KERNEL);
1952 r = copy_irq_from_user(inti, attr->addr);
1957 r = __inject_vm(dev->kvm, inti);
1962 len -= sizeof(struct kvm_s390_irq);
1963 attr->addr += sizeof(struct kvm_s390_irq);
1969 static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id)
1971 if (id >= MAX_S390_IO_ADAPTERS)
1973 return kvm->arch.adapters[id];
1976 static int register_io_adapter(struct kvm_device *dev,
1977 struct kvm_device_attr *attr)
1979 struct s390_io_adapter *adapter;
1980 struct kvm_s390_io_adapter adapter_info;
1982 if (copy_from_user(&adapter_info,
1983 (void __user *)attr->addr, sizeof(adapter_info)))
1986 if ((adapter_info.id >= MAX_S390_IO_ADAPTERS) ||
1987 (dev->kvm->arch.adapters[adapter_info.id] != NULL))
1990 adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
1994 INIT_LIST_HEAD(&adapter->maps);
1995 init_rwsem(&adapter->maps_lock);
1996 atomic_set(&adapter->nr_maps, 0);
1997 adapter->id = adapter_info.id;
1998 adapter->isc = adapter_info.isc;
1999 adapter->maskable = adapter_info.maskable;
2000 adapter->masked = false;
2001 adapter->swap = adapter_info.swap;
2002 adapter->suppressible = (adapter_info.flags) &
2003 KVM_S390_ADAPTER_SUPPRESSIBLE;
2004 dev->kvm->arch.adapters[adapter->id] = adapter;
2009 int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked)
2012 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2014 if (!adapter || !adapter->maskable)
2016 ret = adapter->masked;
2017 adapter->masked = masked;
2021 static int kvm_s390_adapter_map(struct kvm *kvm, unsigned int id, __u64 addr)
2023 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2024 struct s390_map_info *map;
2027 if (!adapter || !addr)
2030 map = kzalloc(sizeof(*map), GFP_KERNEL);
2035 INIT_LIST_HEAD(&map->list);
2036 map->guest_addr = addr;
2037 map->addr = gmap_translate(kvm->arch.gmap, addr);
2038 if (map->addr == -EFAULT) {
2042 ret = get_user_pages_fast(map->addr, 1, 1, &map->page);
2046 down_write(&adapter->maps_lock);
2047 if (atomic_inc_return(&adapter->nr_maps) < MAX_S390_ADAPTER_MAPS) {
2048 list_add_tail(&map->list, &adapter->maps);
2051 put_page(map->page);
2054 up_write(&adapter->maps_lock);
2061 static int kvm_s390_adapter_unmap(struct kvm *kvm, unsigned int id, __u64 addr)
2063 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2064 struct s390_map_info *map, *tmp;
2067 if (!adapter || !addr)
2070 down_write(&adapter->maps_lock);
2071 list_for_each_entry_safe(map, tmp, &adapter->maps, list) {
2072 if (map->guest_addr == addr) {
2074 atomic_dec(&adapter->nr_maps);
2075 list_del(&map->list);
2076 put_page(map->page);
2081 up_write(&adapter->maps_lock);
2083 return found ? 0 : -EINVAL;
2086 void kvm_s390_destroy_adapters(struct kvm *kvm)
2089 struct s390_map_info *map, *tmp;
2091 for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) {
2092 if (!kvm->arch.adapters[i])
2094 list_for_each_entry_safe(map, tmp,
2095 &kvm->arch.adapters[i]->maps, list) {
2096 list_del(&map->list);
2097 put_page(map->page);
2100 kfree(kvm->arch.adapters[i]);
2104 static int modify_io_adapter(struct kvm_device *dev,
2105 struct kvm_device_attr *attr)
2107 struct kvm_s390_io_adapter_req req;
2108 struct s390_io_adapter *adapter;
2111 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2114 adapter = get_io_adapter(dev->kvm, req.id);
2118 case KVM_S390_IO_ADAPTER_MASK:
2119 ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask);
2123 case KVM_S390_IO_ADAPTER_MAP:
2124 ret = kvm_s390_adapter_map(dev->kvm, req.id, req.addr);
2126 case KVM_S390_IO_ADAPTER_UNMAP:
2127 ret = kvm_s390_adapter_unmap(dev->kvm, req.id, req.addr);
2136 static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
2139 const u64 isc_mask = 0xffUL << 24; /* all iscs set */
2144 if (attr->attr != sizeof(schid))
2146 if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
2148 kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
2150 * If userspace is conforming to the architecture, we can have at most
2151 * one pending I/O interrupt per subchannel, so this is effectively a
2157 static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr)
2159 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2160 struct kvm_s390_ais_req req;
2163 if (!test_kvm_facility(kvm, 72))
2166 if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
2169 if (req.isc > MAX_ISC)
2172 trace_kvm_s390_modify_ais_mode(req.isc,
2173 (fi->simm & AIS_MODE_MASK(req.isc)) ?
2174 (fi->nimm & AIS_MODE_MASK(req.isc)) ?
2175 2 : KVM_S390_AIS_MODE_SINGLE :
2176 KVM_S390_AIS_MODE_ALL, req.mode);
2178 mutex_lock(&fi->ais_lock);
2180 case KVM_S390_AIS_MODE_ALL:
2181 fi->simm &= ~AIS_MODE_MASK(req.isc);
2182 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2184 case KVM_S390_AIS_MODE_SINGLE:
2185 fi->simm |= AIS_MODE_MASK(req.isc);
2186 fi->nimm &= ~AIS_MODE_MASK(req.isc);
2191 mutex_unlock(&fi->ais_lock);
2196 static int kvm_s390_inject_airq(struct kvm *kvm,
2197 struct s390_io_adapter *adapter)
2199 struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
2200 struct kvm_s390_interrupt s390int = {
2201 .type = KVM_S390_INT_IO(1, 0, 0, 0),
2203 .parm64 = (adapter->isc << 27) | 0x80000000,
2207 if (!test_kvm_facility(kvm, 72) || !adapter->suppressible)
2208 return kvm_s390_inject_vm(kvm, &s390int);
2210 mutex_lock(&fi->ais_lock);
2211 if (fi->nimm & AIS_MODE_MASK(adapter->isc)) {
2212 trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc);
2216 ret = kvm_s390_inject_vm(kvm, &s390int);
2217 if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) {
2218 fi->nimm |= AIS_MODE_MASK(adapter->isc);
2219 trace_kvm_s390_modify_ais_mode(adapter->isc,
2220 KVM_S390_AIS_MODE_SINGLE, 2);
2223 mutex_unlock(&fi->ais_lock);
2227 static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr)
2229 unsigned int id = attr->attr;
2230 struct s390_io_adapter *adapter = get_io_adapter(kvm, id);
2235 return kvm_s390_inject_airq(kvm, adapter);
2238 static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
2242 struct kvm_vcpu *vcpu;
2244 switch (attr->group) {
2245 case KVM_DEV_FLIC_ENQUEUE:
2246 r = enqueue_floating_irq(dev, attr);
2248 case KVM_DEV_FLIC_CLEAR_IRQS:
2249 kvm_s390_clear_float_irqs(dev->kvm);
2251 case KVM_DEV_FLIC_APF_ENABLE:
2252 dev->kvm->arch.gmap->pfault_enabled = 1;
2254 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2255 dev->kvm->arch.gmap->pfault_enabled = 0;
2257 * Make sure no async faults are in transition when
2258 * clearing the queues. So we don't need to worry
2259 * about late coming workers.
2261 synchronize_srcu(&dev->kvm->srcu);
2262 kvm_for_each_vcpu(i, vcpu, dev->kvm)
2263 kvm_clear_async_pf_completion_queue(vcpu);
2265 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2266 r = register_io_adapter(dev, attr);
2268 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2269 r = modify_io_adapter(dev, attr);
2271 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2272 r = clear_io_irq(dev->kvm, attr);
2274 case KVM_DEV_FLIC_AISM:
2275 r = modify_ais_mode(dev->kvm, attr);
2277 case KVM_DEV_FLIC_AIRQ_INJECT:
2278 r = flic_inject_airq(dev->kvm, attr);
2287 static int flic_has_attr(struct kvm_device *dev,
2288 struct kvm_device_attr *attr)
2290 switch (attr->group) {
2291 case KVM_DEV_FLIC_GET_ALL_IRQS:
2292 case KVM_DEV_FLIC_ENQUEUE:
2293 case KVM_DEV_FLIC_CLEAR_IRQS:
2294 case KVM_DEV_FLIC_APF_ENABLE:
2295 case KVM_DEV_FLIC_APF_DISABLE_WAIT:
2296 case KVM_DEV_FLIC_ADAPTER_REGISTER:
2297 case KVM_DEV_FLIC_ADAPTER_MODIFY:
2298 case KVM_DEV_FLIC_CLEAR_IO_IRQ:
2299 case KVM_DEV_FLIC_AISM:
2300 case KVM_DEV_FLIC_AIRQ_INJECT:
2306 static int flic_create(struct kvm_device *dev, u32 type)
2310 if (dev->kvm->arch.flic)
2312 dev->kvm->arch.flic = dev;
2316 static void flic_destroy(struct kvm_device *dev)
2318 dev->kvm->arch.flic = NULL;
2322 /* s390 floating irq controller (flic) */
2323 struct kvm_device_ops kvm_flic_ops = {
2325 .get_attr = flic_get_attr,
2326 .set_attr = flic_set_attr,
2327 .has_attr = flic_has_attr,
2328 .create = flic_create,
2329 .destroy = flic_destroy,
2332 static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap)
2336 bit = bit_nr + (addr % PAGE_SIZE) * 8;
2338 return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit;
2341 static struct s390_map_info *get_map_info(struct s390_io_adapter *adapter,
2344 struct s390_map_info *map;
2349 list_for_each_entry(map, &adapter->maps, list) {
2350 if (map->guest_addr == addr)
2356 static int adapter_indicators_set(struct kvm *kvm,
2357 struct s390_io_adapter *adapter,
2358 struct kvm_s390_adapter_int *adapter_int)
2361 int summary_set, idx;
2362 struct s390_map_info *info;
2365 info = get_map_info(adapter, adapter_int->ind_addr);
2368 map = page_address(info->page);
2369 bit = get_ind_bit(info->addr, adapter_int->ind_offset, adapter->swap);
2371 idx = srcu_read_lock(&kvm->srcu);
2372 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2373 set_page_dirty_lock(info->page);
2374 info = get_map_info(adapter, adapter_int->summary_addr);
2376 srcu_read_unlock(&kvm->srcu, idx);
2379 map = page_address(info->page);
2380 bit = get_ind_bit(info->addr, adapter_int->summary_offset,
2382 summary_set = test_and_set_bit(bit, map);
2383 mark_page_dirty(kvm, info->guest_addr >> PAGE_SHIFT);
2384 set_page_dirty_lock(info->page);
2385 srcu_read_unlock(&kvm->srcu, idx);
2386 return summary_set ? 0 : 1;
2390 * < 0 - not injected due to error
2391 * = 0 - coalesced, summary indicator already active
2392 * > 0 - injected interrupt
2394 static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e,
2395 struct kvm *kvm, int irq_source_id, int level,
2399 struct s390_io_adapter *adapter;
2401 /* We're only interested in the 0->1 transition. */
2404 adapter = get_io_adapter(kvm, e->adapter.adapter_id);
2407 down_read(&adapter->maps_lock);
2408 ret = adapter_indicators_set(kvm, adapter, &e->adapter);
2409 up_read(&adapter->maps_lock);
2410 if ((ret > 0) && !adapter->masked) {
2411 ret = kvm_s390_inject_airq(kvm, adapter);
2418 int kvm_set_routing_entry(struct kvm *kvm,
2419 struct kvm_kernel_irq_routing_entry *e,
2420 const struct kvm_irq_routing_entry *ue)
2425 case KVM_IRQ_ROUTING_S390_ADAPTER:
2426 e->set = set_adapter_int;
2427 e->adapter.summary_addr = ue->u.adapter.summary_addr;
2428 e->adapter.ind_addr = ue->u.adapter.ind_addr;
2429 e->adapter.summary_offset = ue->u.adapter.summary_offset;
2430 e->adapter.ind_offset = ue->u.adapter.ind_offset;
2431 e->adapter.adapter_id = ue->u.adapter.adapter_id;
2441 int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm,
2442 int irq_source_id, int level, bool line_status)
2447 int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len)
2449 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2450 struct kvm_s390_irq *buf;
2458 if (copy_from_user((void *) buf, irqstate, len)) {
2464 * Don't allow setting the interrupt state
2465 * when there are already interrupts pending
2467 spin_lock(&li->lock);
2468 if (li->pending_irqs) {
2473 for (n = 0; n < len / sizeof(*buf); n++) {
2474 r = do_inject_vcpu(vcpu, &buf[n]);
2480 spin_unlock(&li->lock);
2487 static void store_local_irq(struct kvm_s390_local_interrupt *li,
2488 struct kvm_s390_irq *irq,
2489 unsigned long irq_type)
2492 case IRQ_PEND_MCHK_EX:
2493 case IRQ_PEND_MCHK_REP:
2494 irq->type = KVM_S390_MCHK;
2495 irq->u.mchk = li->irq.mchk;
2498 irq->type = KVM_S390_PROGRAM_INT;
2499 irq->u.pgm = li->irq.pgm;
2501 case IRQ_PEND_PFAULT_INIT:
2502 irq->type = KVM_S390_INT_PFAULT_INIT;
2503 irq->u.ext = li->irq.ext;
2505 case IRQ_PEND_EXT_EXTERNAL:
2506 irq->type = KVM_S390_INT_EXTERNAL_CALL;
2507 irq->u.extcall = li->irq.extcall;
2509 case IRQ_PEND_EXT_CLOCK_COMP:
2510 irq->type = KVM_S390_INT_CLOCK_COMP;
2512 case IRQ_PEND_EXT_CPU_TIMER:
2513 irq->type = KVM_S390_INT_CPU_TIMER;
2515 case IRQ_PEND_SIGP_STOP:
2516 irq->type = KVM_S390_SIGP_STOP;
2517 irq->u.stop = li->irq.stop;
2519 case IRQ_PEND_RESTART:
2520 irq->type = KVM_S390_RESTART;
2522 case IRQ_PEND_SET_PREFIX:
2523 irq->type = KVM_S390_SIGP_SET_PREFIX;
2524 irq->u.prefix = li->irq.prefix;
2529 int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len)
2532 unsigned long sigp_emerg_pending[BITS_TO_LONGS(KVM_MAX_VCPUS)];
2533 struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
2534 unsigned long pending_irqs;
2535 struct kvm_s390_irq irq;
2536 unsigned long irq_type;
2540 spin_lock(&li->lock);
2541 pending_irqs = li->pending_irqs;
2542 memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending,
2543 sizeof(sigp_emerg_pending));
2544 spin_unlock(&li->lock);
2546 for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) {
2547 memset(&irq, 0, sizeof(irq));
2548 if (irq_type == IRQ_PEND_EXT_EMERGENCY)
2550 if (n + sizeof(irq) > len)
2552 store_local_irq(&vcpu->arch.local_int, &irq, irq_type);
2553 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2558 if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) {
2559 for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) {
2560 memset(&irq, 0, sizeof(irq));
2561 if (n + sizeof(irq) > len)
2563 irq.type = KVM_S390_INT_EMERGENCY;
2564 irq.u.emerg.code = cpuaddr;
2565 if (copy_to_user(&buf[n], &irq, sizeof(irq)))
2571 if (sca_ext_call_pending(vcpu, &scn)) {
2572 if (n + sizeof(irq) > len)
2574 memset(&irq, 0, sizeof(irq));
2575 irq.type = KVM_S390_INT_EXTERNAL_CALL;
2576 irq.u.extcall.code = scn;
2577 if (copy_to_user(&buf[n], &irq, sizeof(irq)))