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
;
255 * Check both floating and local interrupt's cr14 because
256 * bit IRQ_PEND_MCHK_REP could be set in both cases.
258 if (!(vcpu
->arch
.sie_block
->gcr
[14] &
259 (vcpu
->kvm
->arch
.float_int
.mchk
.cr14
|
260 vcpu
->arch
.local_int
.irq
.mchk
.cr14
)))
261 __clear_bit(IRQ_PEND_MCHK_REP
, &active_mask
);
264 * STOP irqs will never be actively delivered. They are triggered via
265 * intercept requests and cleared when the stop intercept is performed.
267 __clear_bit(IRQ_PEND_SIGP_STOP
, &active_mask
);
272 static void __set_cpu_idle(struct kvm_vcpu
*vcpu
)
274 atomic_or(CPUSTAT_WAIT
, &vcpu
->arch
.sie_block
->cpuflags
);
275 set_bit(vcpu
->vcpu_id
, vcpu
->arch
.local_int
.float_int
->idle_mask
);
278 static void __unset_cpu_idle(struct kvm_vcpu
*vcpu
)
280 atomic_andnot(CPUSTAT_WAIT
, &vcpu
->arch
.sie_block
->cpuflags
);
281 clear_bit(vcpu
->vcpu_id
, vcpu
->arch
.local_int
.float_int
->idle_mask
);
284 static void __reset_intercept_indicators(struct kvm_vcpu
*vcpu
)
286 atomic_andnot(CPUSTAT_IO_INT
| CPUSTAT_EXT_INT
| CPUSTAT_STOP_INT
,
287 &vcpu
->arch
.sie_block
->cpuflags
);
288 vcpu
->arch
.sie_block
->lctl
= 0x0000;
289 vcpu
->arch
.sie_block
->ictl
&= ~(ICTL_LPSW
| ICTL_STCTL
| ICTL_PINT
);
291 if (guestdbg_enabled(vcpu
)) {
292 vcpu
->arch
.sie_block
->lctl
|= (LCTL_CR0
| LCTL_CR9
|
293 LCTL_CR10
| LCTL_CR11
);
294 vcpu
->arch
.sie_block
->ictl
|= (ICTL_STCTL
| ICTL_PINT
);
298 static void __set_cpuflag(struct kvm_vcpu
*vcpu
, u32 flag
)
300 atomic_or(flag
, &vcpu
->arch
.sie_block
->cpuflags
);
303 static void set_intercept_indicators_io(struct kvm_vcpu
*vcpu
)
305 if (!(pending_irqs(vcpu
) & IRQ_PEND_IO_MASK
))
307 else if (psw_ioint_disabled(vcpu
))
308 __set_cpuflag(vcpu
, CPUSTAT_IO_INT
);
310 vcpu
->arch
.sie_block
->lctl
|= LCTL_CR6
;
313 static void set_intercept_indicators_ext(struct kvm_vcpu
*vcpu
)
315 if (!(pending_irqs(vcpu
) & IRQ_PEND_EXT_MASK
))
317 if (psw_extint_disabled(vcpu
))
318 __set_cpuflag(vcpu
, CPUSTAT_EXT_INT
);
320 vcpu
->arch
.sie_block
->lctl
|= LCTL_CR0
;
323 static void set_intercept_indicators_mchk(struct kvm_vcpu
*vcpu
)
325 if (!(pending_irqs(vcpu
) & IRQ_PEND_MCHK_MASK
))
327 if (psw_mchk_disabled(vcpu
))
328 vcpu
->arch
.sie_block
->ictl
|= ICTL_LPSW
;
330 vcpu
->arch
.sie_block
->lctl
|= LCTL_CR14
;
333 static void set_intercept_indicators_stop(struct kvm_vcpu
*vcpu
)
335 if (kvm_s390_is_stop_irq_pending(vcpu
))
336 __set_cpuflag(vcpu
, CPUSTAT_STOP_INT
);
339 /* Set interception request for non-deliverable interrupts */
340 static void set_intercept_indicators(struct kvm_vcpu
*vcpu
)
342 set_intercept_indicators_io(vcpu
);
343 set_intercept_indicators_ext(vcpu
);
344 set_intercept_indicators_mchk(vcpu
);
345 set_intercept_indicators_stop(vcpu
);
348 static int __must_check
__deliver_cpu_timer(struct kvm_vcpu
*vcpu
)
350 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
353 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_INT_CPU_TIMER
,
356 rc
= put_guest_lc(vcpu
, EXT_IRQ_CPU_TIMER
,
357 (u16
*)__LC_EXT_INT_CODE
);
358 rc
|= put_guest_lc(vcpu
, 0, (u16
*)__LC_EXT_CPU_ADDR
);
359 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
360 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
361 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
362 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
363 clear_bit(IRQ_PEND_EXT_CPU_TIMER
, &li
->pending_irqs
);
364 return rc
? -EFAULT
: 0;
367 static int __must_check
__deliver_ckc(struct kvm_vcpu
*vcpu
)
369 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
372 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_INT_CLOCK_COMP
,
375 rc
= put_guest_lc(vcpu
, EXT_IRQ_CLK_COMP
,
376 (u16 __user
*)__LC_EXT_INT_CODE
);
377 rc
|= put_guest_lc(vcpu
, 0, (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 clear_bit(IRQ_PEND_EXT_CLOCK_COMP
, &li
->pending_irqs
);
383 return rc
? -EFAULT
: 0;
386 static int __must_check
__deliver_pfault_init(struct kvm_vcpu
*vcpu
)
388 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
389 struct kvm_s390_ext_info ext
;
392 spin_lock(&li
->lock
);
394 clear_bit(IRQ_PEND_PFAULT_INIT
, &li
->pending_irqs
);
395 li
->irq
.ext
.ext_params2
= 0;
396 spin_unlock(&li
->lock
);
398 VCPU_EVENT(vcpu
, 4, "deliver: pfault init token 0x%llx",
400 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
401 KVM_S390_INT_PFAULT_INIT
,
404 rc
= put_guest_lc(vcpu
, EXT_IRQ_CP_SERVICE
, (u16
*) __LC_EXT_INT_CODE
);
405 rc
|= put_guest_lc(vcpu
, PFAULT_INIT
, (u16
*) __LC_EXT_CPU_ADDR
);
406 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
407 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
408 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
409 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
410 rc
|= put_guest_lc(vcpu
, ext
.ext_params2
, (u64
*) __LC_EXT_PARAMS2
);
411 return rc
? -EFAULT
: 0;
414 static int __write_machine_check(struct kvm_vcpu
*vcpu
,
415 struct kvm_s390_mchk_info
*mchk
)
417 unsigned long ext_sa_addr
;
419 freg_t fprs
[NUM_FPRS
];
423 mci
.val
= mchk
->mcic
;
424 /* take care of lazy register loading */
426 save_access_regs(vcpu
->run
->s
.regs
.acrs
);
427 if (MACHINE_HAS_GS
&& vcpu
->arch
.gs_enabled
)
428 save_gs_cb(current
->thread
.gs_cb
);
430 /* Extended save area */
431 rc
= read_guest_lc(vcpu
, __LC_MCESAD
, &ext_sa_addr
,
432 sizeof(unsigned long));
433 /* Only bits 0 through 63-LC are used for address formation */
434 lc
= ext_sa_addr
& MCESA_LC_MASK
;
435 if (test_kvm_facility(vcpu
->kvm
, 133)) {
439 ext_sa_addr
&= ~0x3ffUL
;
442 ext_sa_addr
&= ~0x7ffUL
;
445 ext_sa_addr
&= ~0xfffUL
;
452 ext_sa_addr
&= ~0x3ffUL
;
455 if (!rc
&& mci
.vr
&& ext_sa_addr
&& test_kvm_facility(vcpu
->kvm
, 129)) {
456 if (write_guest_abs(vcpu
, ext_sa_addr
, vcpu
->run
->s
.regs
.vrs
,
462 if (!rc
&& mci
.gs
&& ext_sa_addr
&& test_kvm_facility(vcpu
->kvm
, 133)
463 && (lc
== 11 || lc
== 12)) {
464 if (write_guest_abs(vcpu
, ext_sa_addr
+ 1024,
465 &vcpu
->run
->s
.regs
.gscb
, 32))
471 /* General interruption information */
472 rc
|= put_guest_lc(vcpu
, 1, (u8 __user
*) __LC_AR_MODE_ID
);
473 rc
|= write_guest_lc(vcpu
, __LC_MCK_OLD_PSW
,
474 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
475 rc
|= read_guest_lc(vcpu
, __LC_MCK_NEW_PSW
,
476 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
477 rc
|= put_guest_lc(vcpu
, mci
.val
, (u64 __user
*) __LC_MCCK_CODE
);
479 /* Register-save areas */
480 if (MACHINE_HAS_VX
) {
481 convert_vx_to_fp(fprs
, (__vector128
*) vcpu
->run
->s
.regs
.vrs
);
482 rc
|= write_guest_lc(vcpu
, __LC_FPREGS_SAVE_AREA
, fprs
, 128);
484 rc
|= write_guest_lc(vcpu
, __LC_FPREGS_SAVE_AREA
,
485 vcpu
->run
->s
.regs
.fprs
, 128);
487 rc
|= write_guest_lc(vcpu
, __LC_GPREGS_SAVE_AREA
,
488 vcpu
->run
->s
.regs
.gprs
, 128);
489 rc
|= put_guest_lc(vcpu
, current
->thread
.fpu
.fpc
,
490 (u32 __user
*) __LC_FP_CREG_SAVE_AREA
);
491 rc
|= put_guest_lc(vcpu
, vcpu
->arch
.sie_block
->todpr
,
492 (u32 __user
*) __LC_TOD_PROGREG_SAVE_AREA
);
493 rc
|= put_guest_lc(vcpu
, kvm_s390_get_cpu_timer(vcpu
),
494 (u64 __user
*) __LC_CPU_TIMER_SAVE_AREA
);
495 rc
|= put_guest_lc(vcpu
, vcpu
->arch
.sie_block
->ckc
>> 8,
496 (u64 __user
*) __LC_CLOCK_COMP_SAVE_AREA
);
497 rc
|= write_guest_lc(vcpu
, __LC_AREGS_SAVE_AREA
,
498 &vcpu
->run
->s
.regs
.acrs
, 64);
499 rc
|= write_guest_lc(vcpu
, __LC_CREGS_SAVE_AREA
,
500 &vcpu
->arch
.sie_block
->gcr
, 128);
502 /* Extended interruption information */
503 rc
|= put_guest_lc(vcpu
, mchk
->ext_damage_code
,
504 (u32 __user
*) __LC_EXT_DAMAGE_CODE
);
505 rc
|= put_guest_lc(vcpu
, mchk
->failing_storage_address
,
506 (u64 __user
*) __LC_MCCK_FAIL_STOR_ADDR
);
507 rc
|= write_guest_lc(vcpu
, __LC_PSW_SAVE_AREA
, &mchk
->fixed_logout
,
508 sizeof(mchk
->fixed_logout
));
509 return rc
? -EFAULT
: 0;
512 static int __must_check
__deliver_machine_check(struct kvm_vcpu
*vcpu
)
514 struct kvm_s390_float_interrupt
*fi
= &vcpu
->kvm
->arch
.float_int
;
515 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
516 struct kvm_s390_mchk_info mchk
= {};
520 spin_lock(&fi
->lock
);
521 spin_lock(&li
->lock
);
522 if (test_bit(IRQ_PEND_MCHK_EX
, &li
->pending_irqs
) ||
523 test_bit(IRQ_PEND_MCHK_REP
, &li
->pending_irqs
)) {
525 * If there was an exigent machine check pending, then any
526 * repressible machine checks that might have been pending
527 * are indicated along with it, so always clear bits for
528 * repressible and exigent interrupts
531 clear_bit(IRQ_PEND_MCHK_EX
, &li
->pending_irqs
);
532 clear_bit(IRQ_PEND_MCHK_REP
, &li
->pending_irqs
);
533 memset(&li
->irq
.mchk
, 0, sizeof(mchk
));
537 * We indicate floating repressible conditions along with
538 * other pending conditions. Channel Report Pending and Channel
539 * Subsystem damage are the only two and and are indicated by
540 * bits in mcic and masked in cr14.
542 if (test_and_clear_bit(IRQ_PEND_MCHK_REP
, &fi
->pending_irqs
)) {
543 mchk
.mcic
|= fi
->mchk
.mcic
;
544 mchk
.cr14
|= fi
->mchk
.cr14
;
545 memset(&fi
->mchk
, 0, sizeof(mchk
));
548 spin_unlock(&li
->lock
);
549 spin_unlock(&fi
->lock
);
552 VCPU_EVENT(vcpu
, 3, "deliver: machine check mcic 0x%llx",
554 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
556 mchk
.cr14
, mchk
.mcic
);
557 rc
= __write_machine_check(vcpu
, &mchk
);
562 static int __must_check
__deliver_restart(struct kvm_vcpu
*vcpu
)
564 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
567 VCPU_EVENT(vcpu
, 3, "%s", "deliver: cpu restart");
568 vcpu
->stat
.deliver_restart_signal
++;
569 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_RESTART
, 0, 0);
571 rc
= write_guest_lc(vcpu
,
572 offsetof(struct lowcore
, restart_old_psw
),
573 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
574 rc
|= read_guest_lc(vcpu
, offsetof(struct lowcore
, restart_psw
),
575 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
576 clear_bit(IRQ_PEND_RESTART
, &li
->pending_irqs
);
577 return rc
? -EFAULT
: 0;
580 static int __must_check
__deliver_set_prefix(struct kvm_vcpu
*vcpu
)
582 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
583 struct kvm_s390_prefix_info prefix
;
585 spin_lock(&li
->lock
);
586 prefix
= li
->irq
.prefix
;
587 li
->irq
.prefix
.address
= 0;
588 clear_bit(IRQ_PEND_SET_PREFIX
, &li
->pending_irqs
);
589 spin_unlock(&li
->lock
);
591 vcpu
->stat
.deliver_prefix_signal
++;
592 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
593 KVM_S390_SIGP_SET_PREFIX
,
596 kvm_s390_set_prefix(vcpu
, prefix
.address
);
600 static int __must_check
__deliver_emergency_signal(struct kvm_vcpu
*vcpu
)
602 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
606 spin_lock(&li
->lock
);
607 cpu_addr
= find_first_bit(li
->sigp_emerg_pending
, KVM_MAX_VCPUS
);
608 clear_bit(cpu_addr
, li
->sigp_emerg_pending
);
609 if (bitmap_empty(li
->sigp_emerg_pending
, KVM_MAX_VCPUS
))
610 clear_bit(IRQ_PEND_EXT_EMERGENCY
, &li
->pending_irqs
);
611 spin_unlock(&li
->lock
);
613 VCPU_EVENT(vcpu
, 4, "%s", "deliver: sigp emerg");
614 vcpu
->stat
.deliver_emergency_signal
++;
615 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_INT_EMERGENCY
,
618 rc
= put_guest_lc(vcpu
, EXT_IRQ_EMERGENCY_SIG
,
619 (u16
*)__LC_EXT_INT_CODE
);
620 rc
|= put_guest_lc(vcpu
, cpu_addr
, (u16
*)__LC_EXT_CPU_ADDR
);
621 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
622 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
623 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
624 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
625 return rc
? -EFAULT
: 0;
628 static int __must_check
__deliver_external_call(struct kvm_vcpu
*vcpu
)
630 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
631 struct kvm_s390_extcall_info extcall
;
634 spin_lock(&li
->lock
);
635 extcall
= li
->irq
.extcall
;
636 li
->irq
.extcall
.code
= 0;
637 clear_bit(IRQ_PEND_EXT_EXTERNAL
, &li
->pending_irqs
);
638 spin_unlock(&li
->lock
);
640 VCPU_EVENT(vcpu
, 4, "%s", "deliver: sigp ext call");
641 vcpu
->stat
.deliver_external_call
++;
642 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
643 KVM_S390_INT_EXTERNAL_CALL
,
646 rc
= put_guest_lc(vcpu
, EXT_IRQ_EXTERNAL_CALL
,
647 (u16
*)__LC_EXT_INT_CODE
);
648 rc
|= put_guest_lc(vcpu
, extcall
.code
, (u16
*)__LC_EXT_CPU_ADDR
);
649 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
650 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
651 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
, &vcpu
->arch
.sie_block
->gpsw
,
653 return rc
? -EFAULT
: 0;
656 static int __must_check
__deliver_prog(struct kvm_vcpu
*vcpu
)
658 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
659 struct kvm_s390_pgm_info pgm_info
;
660 int rc
= 0, nullifying
= false;
663 spin_lock(&li
->lock
);
664 pgm_info
= li
->irq
.pgm
;
665 clear_bit(IRQ_PEND_PROG
, &li
->pending_irqs
);
666 memset(&li
->irq
.pgm
, 0, sizeof(pgm_info
));
667 spin_unlock(&li
->lock
);
669 ilen
= pgm_info
.flags
& KVM_S390_PGM_FLAGS_ILC_MASK
;
670 VCPU_EVENT(vcpu
, 3, "deliver: program irq code 0x%x, ilen:%d",
671 pgm_info
.code
, ilen
);
672 vcpu
->stat
.deliver_program_int
++;
673 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_PROGRAM_INT
,
676 switch (pgm_info
.code
& ~PGM_PER
) {
677 case PGM_AFX_TRANSLATION
:
678 case PGM_ASX_TRANSLATION
:
679 case PGM_EX_TRANSLATION
:
680 case PGM_LFX_TRANSLATION
:
681 case PGM_LSTE_SEQUENCE
:
682 case PGM_LSX_TRANSLATION
:
683 case PGM_LX_TRANSLATION
:
684 case PGM_PRIMARY_AUTHORITY
:
685 case PGM_SECONDARY_AUTHORITY
:
688 case PGM_SPACE_SWITCH
:
689 rc
= put_guest_lc(vcpu
, pgm_info
.trans_exc_code
,
690 (u64
*)__LC_TRANS_EXC_CODE
);
692 case PGM_ALEN_TRANSLATION
:
693 case PGM_ALE_SEQUENCE
:
694 case PGM_ASTE_INSTANCE
:
695 case PGM_ASTE_SEQUENCE
:
696 case PGM_ASTE_VALIDITY
:
697 case PGM_EXTENDED_AUTHORITY
:
698 rc
= put_guest_lc(vcpu
, pgm_info
.exc_access_id
,
699 (u8
*)__LC_EXC_ACCESS_ID
);
703 case PGM_PAGE_TRANSLATION
:
704 case PGM_REGION_FIRST_TRANS
:
705 case PGM_REGION_SECOND_TRANS
:
706 case PGM_REGION_THIRD_TRANS
:
707 case PGM_SEGMENT_TRANSLATION
:
708 rc
= put_guest_lc(vcpu
, pgm_info
.trans_exc_code
,
709 (u64
*)__LC_TRANS_EXC_CODE
);
710 rc
|= put_guest_lc(vcpu
, pgm_info
.exc_access_id
,
711 (u8
*)__LC_EXC_ACCESS_ID
);
712 rc
|= put_guest_lc(vcpu
, pgm_info
.op_access_id
,
713 (u8
*)__LC_OP_ACCESS_ID
);
717 rc
= put_guest_lc(vcpu
, pgm_info
.mon_class_nr
,
718 (u16
*)__LC_MON_CLASS_NR
);
719 rc
|= put_guest_lc(vcpu
, pgm_info
.mon_code
,
720 (u64
*)__LC_MON_CODE
);
722 case PGM_VECTOR_PROCESSING
:
724 rc
= put_guest_lc(vcpu
, pgm_info
.data_exc_code
,
725 (u32
*)__LC_DATA_EXC_CODE
);
728 rc
= put_guest_lc(vcpu
, pgm_info
.trans_exc_code
,
729 (u64
*)__LC_TRANS_EXC_CODE
);
730 rc
|= put_guest_lc(vcpu
, pgm_info
.exc_access_id
,
731 (u8
*)__LC_EXC_ACCESS_ID
);
734 case PGM_STACK_EMPTY
:
735 case PGM_STACK_SPECIFICATION
:
737 case PGM_STACK_OPERATION
:
738 case PGM_TRACE_TABEL
:
739 case PGM_CRYPTO_OPERATION
:
744 if (pgm_info
.code
& PGM_PER
) {
745 rc
|= put_guest_lc(vcpu
, pgm_info
.per_code
,
746 (u8
*) __LC_PER_CODE
);
747 rc
|= put_guest_lc(vcpu
, pgm_info
.per_atmid
,
748 (u8
*)__LC_PER_ATMID
);
749 rc
|= put_guest_lc(vcpu
, pgm_info
.per_address
,
750 (u64
*) __LC_PER_ADDRESS
);
751 rc
|= put_guest_lc(vcpu
, pgm_info
.per_access_id
,
752 (u8
*) __LC_PER_ACCESS_ID
);
755 if (nullifying
&& !(pgm_info
.flags
& KVM_S390_PGM_FLAGS_NO_REWIND
))
756 kvm_s390_rewind_psw(vcpu
, ilen
);
758 /* bit 1+2 of the target are the ilc, so we can directly use ilen */
759 rc
|= put_guest_lc(vcpu
, ilen
, (u16
*) __LC_PGM_ILC
);
760 rc
|= put_guest_lc(vcpu
, vcpu
->arch
.sie_block
->gbea
,
761 (u64
*) __LC_LAST_BREAK
);
762 rc
|= put_guest_lc(vcpu
, pgm_info
.code
,
763 (u16
*)__LC_PGM_INT_CODE
);
764 rc
|= write_guest_lc(vcpu
, __LC_PGM_OLD_PSW
,
765 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
766 rc
|= read_guest_lc(vcpu
, __LC_PGM_NEW_PSW
,
767 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
768 return rc
? -EFAULT
: 0;
771 static int __must_check
__deliver_service(struct kvm_vcpu
*vcpu
)
773 struct kvm_s390_float_interrupt
*fi
= &vcpu
->kvm
->arch
.float_int
;
774 struct kvm_s390_ext_info ext
;
777 spin_lock(&fi
->lock
);
778 if (!(test_bit(IRQ_PEND_EXT_SERVICE
, &fi
->pending_irqs
))) {
779 spin_unlock(&fi
->lock
);
782 ext
= fi
->srv_signal
;
783 memset(&fi
->srv_signal
, 0, sizeof(ext
));
784 clear_bit(IRQ_PEND_EXT_SERVICE
, &fi
->pending_irqs
);
785 spin_unlock(&fi
->lock
);
787 VCPU_EVENT(vcpu
, 4, "deliver: sclp parameter 0x%x",
789 vcpu
->stat
.deliver_service_signal
++;
790 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
, KVM_S390_INT_SERVICE
,
793 rc
= put_guest_lc(vcpu
, EXT_IRQ_SERVICE_SIG
, (u16
*)__LC_EXT_INT_CODE
);
794 rc
|= put_guest_lc(vcpu
, 0, (u16
*)__LC_EXT_CPU_ADDR
);
795 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
796 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
797 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
798 &vcpu
->arch
.sie_block
->gpsw
, sizeof(psw_t
));
799 rc
|= put_guest_lc(vcpu
, ext
.ext_params
,
800 (u32
*)__LC_EXT_PARAMS
);
802 return rc
? -EFAULT
: 0;
805 static int __must_check
__deliver_pfault_done(struct kvm_vcpu
*vcpu
)
807 struct kvm_s390_float_interrupt
*fi
= &vcpu
->kvm
->arch
.float_int
;
808 struct kvm_s390_interrupt_info
*inti
;
811 spin_lock(&fi
->lock
);
812 inti
= list_first_entry_or_null(&fi
->lists
[FIRQ_LIST_PFAULT
],
813 struct kvm_s390_interrupt_info
,
816 list_del(&inti
->list
);
817 fi
->counters
[FIRQ_CNTR_PFAULT
] -= 1;
819 if (list_empty(&fi
->lists
[FIRQ_LIST_PFAULT
]))
820 clear_bit(IRQ_PEND_PFAULT_DONE
, &fi
->pending_irqs
);
821 spin_unlock(&fi
->lock
);
824 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
825 KVM_S390_INT_PFAULT_DONE
, 0,
826 inti
->ext
.ext_params2
);
827 VCPU_EVENT(vcpu
, 4, "deliver: pfault done token 0x%llx",
828 inti
->ext
.ext_params2
);
830 rc
= put_guest_lc(vcpu
, EXT_IRQ_CP_SERVICE
,
831 (u16
*)__LC_EXT_INT_CODE
);
832 rc
|= put_guest_lc(vcpu
, PFAULT_DONE
,
833 (u16
*)__LC_EXT_CPU_ADDR
);
834 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
835 &vcpu
->arch
.sie_block
->gpsw
,
837 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
838 &vcpu
->arch
.sie_block
->gpsw
,
840 rc
|= put_guest_lc(vcpu
, inti
->ext
.ext_params2
,
841 (u64
*)__LC_EXT_PARAMS2
);
844 return rc
? -EFAULT
: 0;
847 static int __must_check
__deliver_virtio(struct kvm_vcpu
*vcpu
)
849 struct kvm_s390_float_interrupt
*fi
= &vcpu
->kvm
->arch
.float_int
;
850 struct kvm_s390_interrupt_info
*inti
;
853 spin_lock(&fi
->lock
);
854 inti
= list_first_entry_or_null(&fi
->lists
[FIRQ_LIST_VIRTIO
],
855 struct kvm_s390_interrupt_info
,
859 "deliver: virtio parm: 0x%x,parm64: 0x%llx",
860 inti
->ext
.ext_params
, inti
->ext
.ext_params2
);
861 vcpu
->stat
.deliver_virtio_interrupt
++;
862 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
864 inti
->ext
.ext_params
,
865 inti
->ext
.ext_params2
);
866 list_del(&inti
->list
);
867 fi
->counters
[FIRQ_CNTR_VIRTIO
] -= 1;
869 if (list_empty(&fi
->lists
[FIRQ_LIST_VIRTIO
]))
870 clear_bit(IRQ_PEND_VIRTIO
, &fi
->pending_irqs
);
871 spin_unlock(&fi
->lock
);
874 rc
= put_guest_lc(vcpu
, EXT_IRQ_CP_SERVICE
,
875 (u16
*)__LC_EXT_INT_CODE
);
876 rc
|= put_guest_lc(vcpu
, VIRTIO_PARAM
,
877 (u16
*)__LC_EXT_CPU_ADDR
);
878 rc
|= write_guest_lc(vcpu
, __LC_EXT_OLD_PSW
,
879 &vcpu
->arch
.sie_block
->gpsw
,
881 rc
|= read_guest_lc(vcpu
, __LC_EXT_NEW_PSW
,
882 &vcpu
->arch
.sie_block
->gpsw
,
884 rc
|= put_guest_lc(vcpu
, inti
->ext
.ext_params
,
885 (u32
*)__LC_EXT_PARAMS
);
886 rc
|= put_guest_lc(vcpu
, inti
->ext
.ext_params2
,
887 (u64
*)__LC_EXT_PARAMS2
);
890 return rc
? -EFAULT
: 0;
893 static int __must_check
__deliver_io(struct kvm_vcpu
*vcpu
,
894 unsigned long irq_type
)
896 struct list_head
*isc_list
;
897 struct kvm_s390_float_interrupt
*fi
;
898 struct kvm_s390_interrupt_info
*inti
= NULL
;
901 fi
= &vcpu
->kvm
->arch
.float_int
;
903 spin_lock(&fi
->lock
);
904 isc_list
= &fi
->lists
[irq_type
- IRQ_PEND_IO_ISC_0
];
905 inti
= list_first_entry_or_null(isc_list
,
906 struct kvm_s390_interrupt_info
,
909 if (inti
->type
& KVM_S390_INT_IO_AI_MASK
)
910 VCPU_EVENT(vcpu
, 4, "%s", "deliver: I/O (AI)");
912 VCPU_EVENT(vcpu
, 4, "deliver: I/O %x ss %x schid %04x",
913 inti
->io
.subchannel_id
>> 8,
914 inti
->io
.subchannel_id
>> 1 & 0x3,
915 inti
->io
.subchannel_nr
);
917 vcpu
->stat
.deliver_io_int
++;
918 trace_kvm_s390_deliver_interrupt(vcpu
->vcpu_id
,
920 ((__u32
)inti
->io
.subchannel_id
<< 16) |
921 inti
->io
.subchannel_nr
,
922 ((__u64
)inti
->io
.io_int_parm
<< 32) |
923 inti
->io
.io_int_word
);
924 list_del(&inti
->list
);
925 fi
->counters
[FIRQ_CNTR_IO
] -= 1;
927 if (list_empty(isc_list
))
928 clear_bit(irq_type
, &fi
->pending_irqs
);
929 spin_unlock(&fi
->lock
);
932 rc
= put_guest_lc(vcpu
, inti
->io
.subchannel_id
,
933 (u16
*)__LC_SUBCHANNEL_ID
);
934 rc
|= put_guest_lc(vcpu
, inti
->io
.subchannel_nr
,
935 (u16
*)__LC_SUBCHANNEL_NR
);
936 rc
|= put_guest_lc(vcpu
, inti
->io
.io_int_parm
,
937 (u32
*)__LC_IO_INT_PARM
);
938 rc
|= put_guest_lc(vcpu
, inti
->io
.io_int_word
,
939 (u32
*)__LC_IO_INT_WORD
);
940 rc
|= write_guest_lc(vcpu
, __LC_IO_OLD_PSW
,
941 &vcpu
->arch
.sie_block
->gpsw
,
943 rc
|= read_guest_lc(vcpu
, __LC_IO_NEW_PSW
,
944 &vcpu
->arch
.sie_block
->gpsw
,
949 return rc
? -EFAULT
: 0;
952 typedef int (*deliver_irq_t
)(struct kvm_vcpu
*vcpu
);
954 static const deliver_irq_t deliver_irq_funcs
[] = {
955 [IRQ_PEND_MCHK_EX
] = __deliver_machine_check
,
956 [IRQ_PEND_MCHK_REP
] = __deliver_machine_check
,
957 [IRQ_PEND_PROG
] = __deliver_prog
,
958 [IRQ_PEND_EXT_EMERGENCY
] = __deliver_emergency_signal
,
959 [IRQ_PEND_EXT_EXTERNAL
] = __deliver_external_call
,
960 [IRQ_PEND_EXT_CLOCK_COMP
] = __deliver_ckc
,
961 [IRQ_PEND_EXT_CPU_TIMER
] = __deliver_cpu_timer
,
962 [IRQ_PEND_RESTART
] = __deliver_restart
,
963 [IRQ_PEND_SET_PREFIX
] = __deliver_set_prefix
,
964 [IRQ_PEND_PFAULT_INIT
] = __deliver_pfault_init
,
965 [IRQ_PEND_EXT_SERVICE
] = __deliver_service
,
966 [IRQ_PEND_PFAULT_DONE
] = __deliver_pfault_done
,
967 [IRQ_PEND_VIRTIO
] = __deliver_virtio
,
970 /* Check whether an external call is pending (deliverable or not) */
971 int kvm_s390_ext_call_pending(struct kvm_vcpu
*vcpu
)
973 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
975 if (!sclp
.has_sigpif
)
976 return test_bit(IRQ_PEND_EXT_EXTERNAL
, &li
->pending_irqs
);
978 return sca_ext_call_pending(vcpu
, NULL
);
981 int kvm_s390_vcpu_has_irq(struct kvm_vcpu
*vcpu
, int exclude_stop
)
983 if (deliverable_irqs(vcpu
))
986 if (kvm_cpu_has_pending_timer(vcpu
))
989 /* external call pending and deliverable */
990 if (kvm_s390_ext_call_pending(vcpu
) &&
991 !psw_extint_disabled(vcpu
) &&
992 (vcpu
->arch
.sie_block
->gcr
[0] & 0x2000ul
))
995 if (!exclude_stop
&& kvm_s390_is_stop_irq_pending(vcpu
))
1000 int kvm_cpu_has_pending_timer(struct kvm_vcpu
*vcpu
)
1002 return ckc_irq_pending(vcpu
) || cpu_timer_irq_pending(vcpu
);
1005 static u64
__calculate_sltime(struct kvm_vcpu
*vcpu
)
1007 u64 now
, cputm
, sltime
= 0;
1009 if (ckc_interrupts_enabled(vcpu
)) {
1010 now
= kvm_s390_get_tod_clock_fast(vcpu
->kvm
);
1011 sltime
= tod_to_ns(vcpu
->arch
.sie_block
->ckc
- now
);
1012 /* already expired or overflow? */
1013 if (!sltime
|| vcpu
->arch
.sie_block
->ckc
<= now
)
1015 if (cpu_timer_interrupts_enabled(vcpu
)) {
1016 cputm
= kvm_s390_get_cpu_timer(vcpu
);
1017 /* already expired? */
1020 return min(sltime
, tod_to_ns(cputm
));
1022 } else if (cpu_timer_interrupts_enabled(vcpu
)) {
1023 sltime
= kvm_s390_get_cpu_timer(vcpu
);
1024 /* already expired? */
1031 int kvm_s390_handle_wait(struct kvm_vcpu
*vcpu
)
1035 vcpu
->stat
.exit_wait_state
++;
1038 if (kvm_arch_vcpu_runnable(vcpu
))
1041 if (psw_interrupts_disabled(vcpu
)) {
1042 VCPU_EVENT(vcpu
, 3, "%s", "disabled wait");
1043 return -EOPNOTSUPP
; /* disabled wait */
1046 if (!ckc_interrupts_enabled(vcpu
) &&
1047 !cpu_timer_interrupts_enabled(vcpu
)) {
1048 VCPU_EVENT(vcpu
, 3, "%s", "enabled wait w/o timer");
1049 __set_cpu_idle(vcpu
);
1053 sltime
= __calculate_sltime(vcpu
);
1057 __set_cpu_idle(vcpu
);
1058 hrtimer_start(&vcpu
->arch
.ckc_timer
, sltime
, HRTIMER_MODE_REL
);
1059 VCPU_EVENT(vcpu
, 4, "enabled wait: %llu ns", sltime
);
1061 srcu_read_unlock(&vcpu
->kvm
->srcu
, vcpu
->srcu_idx
);
1062 kvm_vcpu_block(vcpu
);
1063 __unset_cpu_idle(vcpu
);
1064 vcpu
->srcu_idx
= srcu_read_lock(&vcpu
->kvm
->srcu
);
1066 hrtimer_cancel(&vcpu
->arch
.ckc_timer
);
1070 void kvm_s390_vcpu_wakeup(struct kvm_vcpu
*vcpu
)
1073 * We cannot move this into the if, as the CPU might be already
1074 * in kvm_vcpu_block without having the waitqueue set (polling)
1076 vcpu
->valid_wakeup
= true;
1077 if (swait_active(&vcpu
->wq
)) {
1079 * The vcpu gave up the cpu voluntarily, mark it as a good
1082 vcpu
->preempted
= true;
1083 swake_up(&vcpu
->wq
);
1084 vcpu
->stat
.halt_wakeup
++;
1087 * The VCPU might not be sleeping but is executing the VSIE. Let's
1088 * kick it, so it leaves the SIE to process the request.
1090 kvm_s390_vsie_kick(vcpu
);
1093 enum hrtimer_restart
kvm_s390_idle_wakeup(struct hrtimer
*timer
)
1095 struct kvm_vcpu
*vcpu
;
1098 vcpu
= container_of(timer
, struct kvm_vcpu
, arch
.ckc_timer
);
1099 sltime
= __calculate_sltime(vcpu
);
1102 * If the monotonic clock runs faster than the tod clock we might be
1103 * woken up too early and have to go back to sleep to avoid deadlocks.
1105 if (sltime
&& hrtimer_forward_now(timer
, ns_to_ktime(sltime
)))
1106 return HRTIMER_RESTART
;
1107 kvm_s390_vcpu_wakeup(vcpu
);
1108 return HRTIMER_NORESTART
;
1111 void kvm_s390_clear_local_irqs(struct kvm_vcpu
*vcpu
)
1113 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1115 spin_lock(&li
->lock
);
1116 li
->pending_irqs
= 0;
1117 bitmap_zero(li
->sigp_emerg_pending
, KVM_MAX_VCPUS
);
1118 memset(&li
->irq
, 0, sizeof(li
->irq
));
1119 spin_unlock(&li
->lock
);
1121 sca_clear_ext_call(vcpu
);
1124 int __must_check
kvm_s390_deliver_pending_interrupts(struct kvm_vcpu
*vcpu
)
1126 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1129 unsigned long irq_type
;
1132 __reset_intercept_indicators(vcpu
);
1134 /* pending ckc conditions might have been invalidated */
1135 clear_bit(IRQ_PEND_EXT_CLOCK_COMP
, &li
->pending_irqs
);
1136 if (ckc_irq_pending(vcpu
))
1137 set_bit(IRQ_PEND_EXT_CLOCK_COMP
, &li
->pending_irqs
);
1139 /* pending cpu timer conditions might have been invalidated */
1140 clear_bit(IRQ_PEND_EXT_CPU_TIMER
, &li
->pending_irqs
);
1141 if (cpu_timer_irq_pending(vcpu
))
1142 set_bit(IRQ_PEND_EXT_CPU_TIMER
, &li
->pending_irqs
);
1144 while ((irqs
= deliverable_irqs(vcpu
)) && !rc
) {
1145 /* bits are in the order of interrupt priority */
1146 irq_type
= find_first_bit(&irqs
, IRQ_PEND_COUNT
);
1147 if (is_ioirq(irq_type
)) {
1148 rc
= __deliver_io(vcpu
, irq_type
);
1150 func
= deliver_irq_funcs
[irq_type
];
1152 WARN_ON_ONCE(func
== NULL
);
1153 clear_bit(irq_type
, &li
->pending_irqs
);
1160 set_intercept_indicators(vcpu
);
1165 static int __inject_prog(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1167 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1169 VCPU_EVENT(vcpu
, 3, "inject: program irq code 0x%x", irq
->u
.pgm
.code
);
1170 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_PROGRAM_INT
,
1171 irq
->u
.pgm
.code
, 0);
1173 if (!(irq
->u
.pgm
.flags
& KVM_S390_PGM_FLAGS_ILC_VALID
)) {
1174 /* auto detection if no valid ILC was given */
1175 irq
->u
.pgm
.flags
&= ~KVM_S390_PGM_FLAGS_ILC_MASK
;
1176 irq
->u
.pgm
.flags
|= kvm_s390_get_ilen(vcpu
);
1177 irq
->u
.pgm
.flags
|= KVM_S390_PGM_FLAGS_ILC_VALID
;
1180 if (irq
->u
.pgm
.code
== PGM_PER
) {
1181 li
->irq
.pgm
.code
|= PGM_PER
;
1182 li
->irq
.pgm
.flags
= irq
->u
.pgm
.flags
;
1183 /* only modify PER related information */
1184 li
->irq
.pgm
.per_address
= irq
->u
.pgm
.per_address
;
1185 li
->irq
.pgm
.per_code
= irq
->u
.pgm
.per_code
;
1186 li
->irq
.pgm
.per_atmid
= irq
->u
.pgm
.per_atmid
;
1187 li
->irq
.pgm
.per_access_id
= irq
->u
.pgm
.per_access_id
;
1188 } else if (!(irq
->u
.pgm
.code
& PGM_PER
)) {
1189 li
->irq
.pgm
.code
= (li
->irq
.pgm
.code
& PGM_PER
) |
1191 li
->irq
.pgm
.flags
= irq
->u
.pgm
.flags
;
1192 /* only modify non-PER information */
1193 li
->irq
.pgm
.trans_exc_code
= irq
->u
.pgm
.trans_exc_code
;
1194 li
->irq
.pgm
.mon_code
= irq
->u
.pgm
.mon_code
;
1195 li
->irq
.pgm
.data_exc_code
= irq
->u
.pgm
.data_exc_code
;
1196 li
->irq
.pgm
.mon_class_nr
= irq
->u
.pgm
.mon_class_nr
;
1197 li
->irq
.pgm
.exc_access_id
= irq
->u
.pgm
.exc_access_id
;
1198 li
->irq
.pgm
.op_access_id
= irq
->u
.pgm
.op_access_id
;
1200 li
->irq
.pgm
= irq
->u
.pgm
;
1202 set_bit(IRQ_PEND_PROG
, &li
->pending_irqs
);
1206 static int __inject_pfault_init(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1208 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1210 VCPU_EVENT(vcpu
, 4, "inject: pfault init parameter block at 0x%llx",
1211 irq
->u
.ext
.ext_params2
);
1212 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_PFAULT_INIT
,
1213 irq
->u
.ext
.ext_params
,
1214 irq
->u
.ext
.ext_params2
);
1216 li
->irq
.ext
= irq
->u
.ext
;
1217 set_bit(IRQ_PEND_PFAULT_INIT
, &li
->pending_irqs
);
1218 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1222 static int __inject_extcall(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1224 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1225 struct kvm_s390_extcall_info
*extcall
= &li
->irq
.extcall
;
1226 uint16_t src_id
= irq
->u
.extcall
.code
;
1228 VCPU_EVENT(vcpu
, 4, "inject: external call source-cpu:%u",
1230 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_EXTERNAL_CALL
,
1233 /* sending vcpu invalid */
1234 if (kvm_get_vcpu_by_id(vcpu
->kvm
, src_id
) == NULL
)
1237 if (sclp
.has_sigpif
)
1238 return sca_inject_ext_call(vcpu
, src_id
);
1240 if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL
, &li
->pending_irqs
))
1242 *extcall
= irq
->u
.extcall
;
1243 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1247 static int __inject_set_prefix(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1249 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1250 struct kvm_s390_prefix_info
*prefix
= &li
->irq
.prefix
;
1252 VCPU_EVENT(vcpu
, 3, "inject: set prefix to %x",
1253 irq
->u
.prefix
.address
);
1254 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_SIGP_SET_PREFIX
,
1255 irq
->u
.prefix
.address
, 0);
1257 if (!is_vcpu_stopped(vcpu
))
1260 *prefix
= irq
->u
.prefix
;
1261 set_bit(IRQ_PEND_SET_PREFIX
, &li
->pending_irqs
);
1265 #define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS)
1266 static int __inject_sigp_stop(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1268 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1269 struct kvm_s390_stop_info
*stop
= &li
->irq
.stop
;
1272 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_SIGP_STOP
, 0, 0);
1274 if (irq
->u
.stop
.flags
& ~KVM_S390_STOP_SUPP_FLAGS
)
1277 if (is_vcpu_stopped(vcpu
)) {
1278 if (irq
->u
.stop
.flags
& KVM_S390_STOP_FLAG_STORE_STATUS
)
1279 rc
= kvm_s390_store_status_unloaded(vcpu
,
1280 KVM_S390_STORE_STATUS_NOADDR
);
1284 if (test_and_set_bit(IRQ_PEND_SIGP_STOP
, &li
->pending_irqs
))
1286 stop
->flags
= irq
->u
.stop
.flags
;
1287 __set_cpuflag(vcpu
, CPUSTAT_STOP_INT
);
1291 static int __inject_sigp_restart(struct kvm_vcpu
*vcpu
,
1292 struct kvm_s390_irq
*irq
)
1294 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1296 VCPU_EVENT(vcpu
, 3, "%s", "inject: restart int");
1297 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_RESTART
, 0, 0);
1299 set_bit(IRQ_PEND_RESTART
, &li
->pending_irqs
);
1303 static int __inject_sigp_emergency(struct kvm_vcpu
*vcpu
,
1304 struct kvm_s390_irq
*irq
)
1306 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1308 VCPU_EVENT(vcpu
, 4, "inject: emergency from cpu %u",
1310 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_EMERGENCY
,
1311 irq
->u
.emerg
.code
, 0);
1313 /* sending vcpu invalid */
1314 if (kvm_get_vcpu_by_id(vcpu
->kvm
, irq
->u
.emerg
.code
) == NULL
)
1317 set_bit(irq
->u
.emerg
.code
, li
->sigp_emerg_pending
);
1318 set_bit(IRQ_PEND_EXT_EMERGENCY
, &li
->pending_irqs
);
1319 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1323 static int __inject_mchk(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1325 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1326 struct kvm_s390_mchk_info
*mchk
= &li
->irq
.mchk
;
1328 VCPU_EVENT(vcpu
, 3, "inject: machine check mcic 0x%llx",
1330 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_MCHK
, 0,
1334 * Because repressible machine checks can be indicated along with
1335 * exigent machine checks (PoP, Chapter 11, Interruption action)
1336 * we need to combine cr14, mcic and external damage code.
1337 * Failing storage address and the logout area should not be or'ed
1338 * together, we just indicate the last occurrence of the corresponding
1341 mchk
->cr14
|= irq
->u
.mchk
.cr14
;
1342 mchk
->mcic
|= irq
->u
.mchk
.mcic
;
1343 mchk
->ext_damage_code
|= irq
->u
.mchk
.ext_damage_code
;
1344 mchk
->failing_storage_address
= irq
->u
.mchk
.failing_storage_address
;
1345 memcpy(&mchk
->fixed_logout
, &irq
->u
.mchk
.fixed_logout
,
1346 sizeof(mchk
->fixed_logout
));
1347 if (mchk
->mcic
& MCHK_EX_MASK
)
1348 set_bit(IRQ_PEND_MCHK_EX
, &li
->pending_irqs
);
1349 else if (mchk
->mcic
& MCHK_REP_MASK
)
1350 set_bit(IRQ_PEND_MCHK_REP
, &li
->pending_irqs
);
1354 static int __inject_ckc(struct kvm_vcpu
*vcpu
)
1356 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1358 VCPU_EVENT(vcpu
, 3, "%s", "inject: clock comparator external");
1359 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_CLOCK_COMP
,
1362 set_bit(IRQ_PEND_EXT_CLOCK_COMP
, &li
->pending_irqs
);
1363 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1367 static int __inject_cpu_timer(struct kvm_vcpu
*vcpu
)
1369 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1371 VCPU_EVENT(vcpu
, 3, "%s", "inject: cpu timer external");
1372 trace_kvm_s390_inject_vcpu(vcpu
->vcpu_id
, KVM_S390_INT_CPU_TIMER
,
1375 set_bit(IRQ_PEND_EXT_CPU_TIMER
, &li
->pending_irqs
);
1376 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1380 static struct kvm_s390_interrupt_info
*get_io_int(struct kvm
*kvm
,
1383 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1384 struct list_head
*isc_list
= &fi
->lists
[FIRQ_LIST_IO_ISC_0
+ isc
];
1385 struct kvm_s390_interrupt_info
*iter
;
1386 u16 id
= (schid
& 0xffff0000U
) >> 16;
1387 u16 nr
= schid
& 0x0000ffffU
;
1389 spin_lock(&fi
->lock
);
1390 list_for_each_entry(iter
, isc_list
, list
) {
1391 if (schid
&& (id
!= iter
->io
.subchannel_id
||
1392 nr
!= iter
->io
.subchannel_nr
))
1394 /* found an appropriate entry */
1395 list_del_init(&iter
->list
);
1396 fi
->counters
[FIRQ_CNTR_IO
] -= 1;
1397 if (list_empty(isc_list
))
1398 clear_bit(IRQ_PEND_IO_ISC_0
+ isc
, &fi
->pending_irqs
);
1399 spin_unlock(&fi
->lock
);
1402 spin_unlock(&fi
->lock
);
1407 * Dequeue and return an I/O interrupt matching any of the interruption
1408 * subclasses as designated by the isc mask in cr6 and the schid (if != 0).
1410 struct kvm_s390_interrupt_info
*kvm_s390_get_io_int(struct kvm
*kvm
,
1411 u64 isc_mask
, u32 schid
)
1413 struct kvm_s390_interrupt_info
*inti
= NULL
;
1416 for (isc
= 0; isc
<= MAX_ISC
&& !inti
; isc
++) {
1417 if (isc_mask
& isc_to_isc_bits(isc
))
1418 inti
= get_io_int(kvm
, isc
, schid
);
1423 #define SCCB_MASK 0xFFFFFFF8
1424 #define SCCB_EVENT_PENDING 0x3
1426 static int __inject_service(struct kvm
*kvm
,
1427 struct kvm_s390_interrupt_info
*inti
)
1429 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1431 spin_lock(&fi
->lock
);
1432 fi
->srv_signal
.ext_params
|= inti
->ext
.ext_params
& SCCB_EVENT_PENDING
;
1434 * Early versions of the QEMU s390 bios will inject several
1435 * service interrupts after another without handling a
1436 * condition code indicating busy.
1437 * We will silently ignore those superfluous sccb values.
1438 * A future version of QEMU will take care of serialization
1441 if (fi
->srv_signal
.ext_params
& SCCB_MASK
)
1443 fi
->srv_signal
.ext_params
|= inti
->ext
.ext_params
& SCCB_MASK
;
1444 set_bit(IRQ_PEND_EXT_SERVICE
, &fi
->pending_irqs
);
1446 spin_unlock(&fi
->lock
);
1451 static int __inject_virtio(struct kvm
*kvm
,
1452 struct kvm_s390_interrupt_info
*inti
)
1454 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1456 spin_lock(&fi
->lock
);
1457 if (fi
->counters
[FIRQ_CNTR_VIRTIO
] >= KVM_S390_MAX_VIRTIO_IRQS
) {
1458 spin_unlock(&fi
->lock
);
1461 fi
->counters
[FIRQ_CNTR_VIRTIO
] += 1;
1462 list_add_tail(&inti
->list
, &fi
->lists
[FIRQ_LIST_VIRTIO
]);
1463 set_bit(IRQ_PEND_VIRTIO
, &fi
->pending_irqs
);
1464 spin_unlock(&fi
->lock
);
1468 static int __inject_pfault_done(struct kvm
*kvm
,
1469 struct kvm_s390_interrupt_info
*inti
)
1471 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1473 spin_lock(&fi
->lock
);
1474 if (fi
->counters
[FIRQ_CNTR_PFAULT
] >=
1475 (ASYNC_PF_PER_VCPU
* KVM_MAX_VCPUS
)) {
1476 spin_unlock(&fi
->lock
);
1479 fi
->counters
[FIRQ_CNTR_PFAULT
] += 1;
1480 list_add_tail(&inti
->list
, &fi
->lists
[FIRQ_LIST_PFAULT
]);
1481 set_bit(IRQ_PEND_PFAULT_DONE
, &fi
->pending_irqs
);
1482 spin_unlock(&fi
->lock
);
1486 #define CR_PENDING_SUBCLASS 28
1487 static int __inject_float_mchk(struct kvm
*kvm
,
1488 struct kvm_s390_interrupt_info
*inti
)
1490 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1492 spin_lock(&fi
->lock
);
1493 fi
->mchk
.cr14
|= inti
->mchk
.cr14
& (1UL << CR_PENDING_SUBCLASS
);
1494 fi
->mchk
.mcic
|= inti
->mchk
.mcic
;
1495 set_bit(IRQ_PEND_MCHK_REP
, &fi
->pending_irqs
);
1496 spin_unlock(&fi
->lock
);
1501 static int __inject_io(struct kvm
*kvm
, struct kvm_s390_interrupt_info
*inti
)
1503 struct kvm_s390_float_interrupt
*fi
;
1504 struct list_head
*list
;
1507 fi
= &kvm
->arch
.float_int
;
1508 spin_lock(&fi
->lock
);
1509 if (fi
->counters
[FIRQ_CNTR_IO
] >= KVM_S390_MAX_FLOAT_IRQS
) {
1510 spin_unlock(&fi
->lock
);
1513 fi
->counters
[FIRQ_CNTR_IO
] += 1;
1515 if (inti
->type
& KVM_S390_INT_IO_AI_MASK
)
1516 VM_EVENT(kvm
, 4, "%s", "inject: I/O (AI)");
1518 VM_EVENT(kvm
, 4, "inject: I/O %x ss %x schid %04x",
1519 inti
->io
.subchannel_id
>> 8,
1520 inti
->io
.subchannel_id
>> 1 & 0x3,
1521 inti
->io
.subchannel_nr
);
1522 isc
= int_word_to_isc(inti
->io
.io_int_word
);
1523 list
= &fi
->lists
[FIRQ_LIST_IO_ISC_0
+ isc
];
1524 list_add_tail(&inti
->list
, list
);
1525 set_bit(IRQ_PEND_IO_ISC_0
+ isc
, &fi
->pending_irqs
);
1526 spin_unlock(&fi
->lock
);
1531 * Find a destination VCPU for a floating irq and kick it.
1533 static void __floating_irq_kick(struct kvm
*kvm
, u64 type
)
1535 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1536 struct kvm_s390_local_interrupt
*li
;
1537 struct kvm_vcpu
*dst_vcpu
;
1538 int sigcpu
, online_vcpus
, nr_tries
= 0;
1540 online_vcpus
= atomic_read(&kvm
->online_vcpus
);
1544 /* find idle VCPUs first, then round robin */
1545 sigcpu
= find_first_bit(fi
->idle_mask
, online_vcpus
);
1546 if (sigcpu
== online_vcpus
) {
1548 sigcpu
= fi
->next_rr_cpu
;
1549 fi
->next_rr_cpu
= (fi
->next_rr_cpu
+ 1) % online_vcpus
;
1550 /* avoid endless loops if all vcpus are stopped */
1551 if (nr_tries
++ >= online_vcpus
)
1553 } while (is_vcpu_stopped(kvm_get_vcpu(kvm
, sigcpu
)));
1555 dst_vcpu
= kvm_get_vcpu(kvm
, sigcpu
);
1557 /* make the VCPU drop out of the SIE, or wake it up if sleeping */
1558 li
= &dst_vcpu
->arch
.local_int
;
1559 spin_lock(&li
->lock
);
1562 atomic_or(CPUSTAT_STOP_INT
, li
->cpuflags
);
1564 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1565 atomic_or(CPUSTAT_IO_INT
, li
->cpuflags
);
1568 atomic_or(CPUSTAT_EXT_INT
, li
->cpuflags
);
1571 spin_unlock(&li
->lock
);
1572 kvm_s390_vcpu_wakeup(dst_vcpu
);
1575 static int __inject_vm(struct kvm
*kvm
, struct kvm_s390_interrupt_info
*inti
)
1577 u64 type
= READ_ONCE(inti
->type
);
1582 rc
= __inject_float_mchk(kvm
, inti
);
1584 case KVM_S390_INT_VIRTIO
:
1585 rc
= __inject_virtio(kvm
, inti
);
1587 case KVM_S390_INT_SERVICE
:
1588 rc
= __inject_service(kvm
, inti
);
1590 case KVM_S390_INT_PFAULT_DONE
:
1591 rc
= __inject_pfault_done(kvm
, inti
);
1593 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1594 rc
= __inject_io(kvm
, inti
);
1602 __floating_irq_kick(kvm
, type
);
1606 int kvm_s390_inject_vm(struct kvm
*kvm
,
1607 struct kvm_s390_interrupt
*s390int
)
1609 struct kvm_s390_interrupt_info
*inti
;
1612 inti
= kzalloc(sizeof(*inti
), GFP_KERNEL
);
1616 inti
->type
= s390int
->type
;
1617 switch (inti
->type
) {
1618 case KVM_S390_INT_VIRTIO
:
1619 VM_EVENT(kvm
, 5, "inject: virtio parm:%x,parm64:%llx",
1620 s390int
->parm
, s390int
->parm64
);
1621 inti
->ext
.ext_params
= s390int
->parm
;
1622 inti
->ext
.ext_params2
= s390int
->parm64
;
1624 case KVM_S390_INT_SERVICE
:
1625 VM_EVENT(kvm
, 4, "inject: sclp parm:%x", s390int
->parm
);
1626 inti
->ext
.ext_params
= s390int
->parm
;
1628 case KVM_S390_INT_PFAULT_DONE
:
1629 inti
->ext
.ext_params2
= s390int
->parm64
;
1632 VM_EVENT(kvm
, 3, "inject: machine check mcic 0x%llx",
1634 inti
->mchk
.cr14
= s390int
->parm
; /* upper bits are not used */
1635 inti
->mchk
.mcic
= s390int
->parm64
;
1637 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1638 inti
->io
.subchannel_id
= s390int
->parm
>> 16;
1639 inti
->io
.subchannel_nr
= s390int
->parm
& 0x0000ffffu
;
1640 inti
->io
.io_int_parm
= s390int
->parm64
>> 32;
1641 inti
->io
.io_int_word
= s390int
->parm64
& 0x00000000ffffffffull
;
1647 trace_kvm_s390_inject_vm(s390int
->type
, s390int
->parm
, s390int
->parm64
,
1650 rc
= __inject_vm(kvm
, inti
);
1656 int kvm_s390_reinject_io_int(struct kvm
*kvm
,
1657 struct kvm_s390_interrupt_info
*inti
)
1659 return __inject_vm(kvm
, inti
);
1662 int s390int_to_s390irq(struct kvm_s390_interrupt
*s390int
,
1663 struct kvm_s390_irq
*irq
)
1665 irq
->type
= s390int
->type
;
1666 switch (irq
->type
) {
1667 case KVM_S390_PROGRAM_INT
:
1668 if (s390int
->parm
& 0xffff0000)
1670 irq
->u
.pgm
.code
= s390int
->parm
;
1672 case KVM_S390_SIGP_SET_PREFIX
:
1673 irq
->u
.prefix
.address
= s390int
->parm
;
1675 case KVM_S390_SIGP_STOP
:
1676 irq
->u
.stop
.flags
= s390int
->parm
;
1678 case KVM_S390_INT_EXTERNAL_CALL
:
1679 if (s390int
->parm
& 0xffff0000)
1681 irq
->u
.extcall
.code
= s390int
->parm
;
1683 case KVM_S390_INT_EMERGENCY
:
1684 if (s390int
->parm
& 0xffff0000)
1686 irq
->u
.emerg
.code
= s390int
->parm
;
1689 irq
->u
.mchk
.mcic
= s390int
->parm64
;
1695 int kvm_s390_is_stop_irq_pending(struct kvm_vcpu
*vcpu
)
1697 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1699 return test_bit(IRQ_PEND_SIGP_STOP
, &li
->pending_irqs
);
1702 void kvm_s390_clear_stop_irq(struct kvm_vcpu
*vcpu
)
1704 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1706 spin_lock(&li
->lock
);
1707 li
->irq
.stop
.flags
= 0;
1708 clear_bit(IRQ_PEND_SIGP_STOP
, &li
->pending_irqs
);
1709 spin_unlock(&li
->lock
);
1712 static int do_inject_vcpu(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1716 switch (irq
->type
) {
1717 case KVM_S390_PROGRAM_INT
:
1718 rc
= __inject_prog(vcpu
, irq
);
1720 case KVM_S390_SIGP_SET_PREFIX
:
1721 rc
= __inject_set_prefix(vcpu
, irq
);
1723 case KVM_S390_SIGP_STOP
:
1724 rc
= __inject_sigp_stop(vcpu
, irq
);
1726 case KVM_S390_RESTART
:
1727 rc
= __inject_sigp_restart(vcpu
, irq
);
1729 case KVM_S390_INT_CLOCK_COMP
:
1730 rc
= __inject_ckc(vcpu
);
1732 case KVM_S390_INT_CPU_TIMER
:
1733 rc
= __inject_cpu_timer(vcpu
);
1735 case KVM_S390_INT_EXTERNAL_CALL
:
1736 rc
= __inject_extcall(vcpu
, irq
);
1738 case KVM_S390_INT_EMERGENCY
:
1739 rc
= __inject_sigp_emergency(vcpu
, irq
);
1742 rc
= __inject_mchk(vcpu
, irq
);
1744 case KVM_S390_INT_PFAULT_INIT
:
1745 rc
= __inject_pfault_init(vcpu
, irq
);
1747 case KVM_S390_INT_VIRTIO
:
1748 case KVM_S390_INT_SERVICE
:
1749 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1757 int kvm_s390_inject_vcpu(struct kvm_vcpu
*vcpu
, struct kvm_s390_irq
*irq
)
1759 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
1762 spin_lock(&li
->lock
);
1763 rc
= do_inject_vcpu(vcpu
, irq
);
1764 spin_unlock(&li
->lock
);
1766 kvm_s390_vcpu_wakeup(vcpu
);
1770 static inline void clear_irq_list(struct list_head
*_list
)
1772 struct kvm_s390_interrupt_info
*inti
, *n
;
1774 list_for_each_entry_safe(inti
, n
, _list
, list
) {
1775 list_del(&inti
->list
);
1780 static void inti_to_irq(struct kvm_s390_interrupt_info
*inti
,
1781 struct kvm_s390_irq
*irq
)
1783 irq
->type
= inti
->type
;
1784 switch (inti
->type
) {
1785 case KVM_S390_INT_PFAULT_INIT
:
1786 case KVM_S390_INT_PFAULT_DONE
:
1787 case KVM_S390_INT_VIRTIO
:
1788 irq
->u
.ext
= inti
->ext
;
1790 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1791 irq
->u
.io
= inti
->io
;
1796 void kvm_s390_clear_float_irqs(struct kvm
*kvm
)
1798 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1801 spin_lock(&fi
->lock
);
1802 fi
->pending_irqs
= 0;
1803 memset(&fi
->srv_signal
, 0, sizeof(fi
->srv_signal
));
1804 memset(&fi
->mchk
, 0, sizeof(fi
->mchk
));
1805 for (i
= 0; i
< FIRQ_LIST_COUNT
; i
++)
1806 clear_irq_list(&fi
->lists
[i
]);
1807 for (i
= 0; i
< FIRQ_MAX_COUNT
; i
++)
1808 fi
->counters
[i
] = 0;
1809 spin_unlock(&fi
->lock
);
1812 static int get_all_floating_irqs(struct kvm
*kvm
, u8 __user
*usrbuf
, u64 len
)
1814 struct kvm_s390_interrupt_info
*inti
;
1815 struct kvm_s390_float_interrupt
*fi
;
1816 struct kvm_s390_irq
*buf
;
1817 struct kvm_s390_irq
*irq
;
1823 if (len
> KVM_S390_FLIC_MAX_BUFFER
|| len
== 0)
1827 * We are already using -ENOMEM to signal
1828 * userspace it may retry with a bigger buffer,
1829 * so we need to use something else for this case
1835 max_irqs
= len
/ sizeof(struct kvm_s390_irq
);
1837 fi
= &kvm
->arch
.float_int
;
1838 spin_lock(&fi
->lock
);
1839 for (i
= 0; i
< FIRQ_LIST_COUNT
; i
++) {
1840 list_for_each_entry(inti
, &fi
->lists
[i
], list
) {
1841 if (n
== max_irqs
) {
1842 /* signal userspace to try again */
1846 inti_to_irq(inti
, &buf
[n
]);
1850 if (test_bit(IRQ_PEND_EXT_SERVICE
, &fi
->pending_irqs
)) {
1851 if (n
== max_irqs
) {
1852 /* signal userspace to try again */
1856 irq
= (struct kvm_s390_irq
*) &buf
[n
];
1857 irq
->type
= KVM_S390_INT_SERVICE
;
1858 irq
->u
.ext
= fi
->srv_signal
;
1861 if (test_bit(IRQ_PEND_MCHK_REP
, &fi
->pending_irqs
)) {
1862 if (n
== max_irqs
) {
1863 /* signal userspace to try again */
1867 irq
= (struct kvm_s390_irq
*) &buf
[n
];
1868 irq
->type
= KVM_S390_MCHK
;
1869 irq
->u
.mchk
= fi
->mchk
;
1874 spin_unlock(&fi
->lock
);
1875 if (!ret
&& n
> 0) {
1876 if (copy_to_user(usrbuf
, buf
, sizeof(struct kvm_s390_irq
) * n
))
1881 return ret
< 0 ? ret
: n
;
1884 static int flic_ais_mode_get_all(struct kvm
*kvm
, struct kvm_device_attr
*attr
)
1886 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
1887 struct kvm_s390_ais_all ais
;
1889 if (attr
->attr
< sizeof(ais
))
1892 if (!test_kvm_facility(kvm
, 72))
1895 mutex_lock(&fi
->ais_lock
);
1896 ais
.simm
= fi
->simm
;
1897 ais
.nimm
= fi
->nimm
;
1898 mutex_unlock(&fi
->ais_lock
);
1900 if (copy_to_user((void __user
*)attr
->addr
, &ais
, sizeof(ais
)))
1906 static int flic_get_attr(struct kvm_device
*dev
, struct kvm_device_attr
*attr
)
1910 switch (attr
->group
) {
1911 case KVM_DEV_FLIC_GET_ALL_IRQS
:
1912 r
= get_all_floating_irqs(dev
->kvm
, (u8 __user
*) attr
->addr
,
1915 case KVM_DEV_FLIC_AISM_ALL
:
1916 r
= flic_ais_mode_get_all(dev
->kvm
, attr
);
1925 static inline int copy_irq_from_user(struct kvm_s390_interrupt_info
*inti
,
1928 struct kvm_s390_irq __user
*uptr
= (struct kvm_s390_irq __user
*) addr
;
1929 void *target
= NULL
;
1930 void __user
*source
;
1933 if (get_user(inti
->type
, (u64 __user
*)addr
))
1936 switch (inti
->type
) {
1937 case KVM_S390_INT_PFAULT_INIT
:
1938 case KVM_S390_INT_PFAULT_DONE
:
1939 case KVM_S390_INT_VIRTIO
:
1940 case KVM_S390_INT_SERVICE
:
1941 target
= (void *) &inti
->ext
;
1942 source
= &uptr
->u
.ext
;
1943 size
= sizeof(inti
->ext
);
1945 case KVM_S390_INT_IO_MIN
...KVM_S390_INT_IO_MAX
:
1946 target
= (void *) &inti
->io
;
1947 source
= &uptr
->u
.io
;
1948 size
= sizeof(inti
->io
);
1951 target
= (void *) &inti
->mchk
;
1952 source
= &uptr
->u
.mchk
;
1953 size
= sizeof(inti
->mchk
);
1959 if (copy_from_user(target
, source
, size
))
1965 static int enqueue_floating_irq(struct kvm_device
*dev
,
1966 struct kvm_device_attr
*attr
)
1968 struct kvm_s390_interrupt_info
*inti
= NULL
;
1970 int len
= attr
->attr
;
1972 if (len
% sizeof(struct kvm_s390_irq
) != 0)
1974 else if (len
> KVM_S390_FLIC_MAX_BUFFER
)
1977 while (len
>= sizeof(struct kvm_s390_irq
)) {
1978 inti
= kzalloc(sizeof(*inti
), GFP_KERNEL
);
1982 r
= copy_irq_from_user(inti
, attr
->addr
);
1987 r
= __inject_vm(dev
->kvm
, inti
);
1992 len
-= sizeof(struct kvm_s390_irq
);
1993 attr
->addr
+= sizeof(struct kvm_s390_irq
);
1999 static struct s390_io_adapter
*get_io_adapter(struct kvm
*kvm
, unsigned int id
)
2001 if (id
>= MAX_S390_IO_ADAPTERS
)
2003 return kvm
->arch
.adapters
[id
];
2006 static int register_io_adapter(struct kvm_device
*dev
,
2007 struct kvm_device_attr
*attr
)
2009 struct s390_io_adapter
*adapter
;
2010 struct kvm_s390_io_adapter adapter_info
;
2012 if (copy_from_user(&adapter_info
,
2013 (void __user
*)attr
->addr
, sizeof(adapter_info
)))
2016 if ((adapter_info
.id
>= MAX_S390_IO_ADAPTERS
) ||
2017 (dev
->kvm
->arch
.adapters
[adapter_info
.id
] != NULL
))
2020 adapter
= kzalloc(sizeof(*adapter
), GFP_KERNEL
);
2024 INIT_LIST_HEAD(&adapter
->maps
);
2025 init_rwsem(&adapter
->maps_lock
);
2026 atomic_set(&adapter
->nr_maps
, 0);
2027 adapter
->id
= adapter_info
.id
;
2028 adapter
->isc
= adapter_info
.isc
;
2029 adapter
->maskable
= adapter_info
.maskable
;
2030 adapter
->masked
= false;
2031 adapter
->swap
= adapter_info
.swap
;
2032 adapter
->suppressible
= (adapter_info
.flags
) &
2033 KVM_S390_ADAPTER_SUPPRESSIBLE
;
2034 dev
->kvm
->arch
.adapters
[adapter
->id
] = adapter
;
2039 int kvm_s390_mask_adapter(struct kvm
*kvm
, unsigned int id
, bool masked
)
2042 struct s390_io_adapter
*adapter
= get_io_adapter(kvm
, id
);
2044 if (!adapter
|| !adapter
->maskable
)
2046 ret
= adapter
->masked
;
2047 adapter
->masked
= masked
;
2051 static int kvm_s390_adapter_map(struct kvm
*kvm
, unsigned int id
, __u64 addr
)
2053 struct s390_io_adapter
*adapter
= get_io_adapter(kvm
, id
);
2054 struct s390_map_info
*map
;
2057 if (!adapter
|| !addr
)
2060 map
= kzalloc(sizeof(*map
), GFP_KERNEL
);
2065 INIT_LIST_HEAD(&map
->list
);
2066 map
->guest_addr
= addr
;
2067 map
->addr
= gmap_translate(kvm
->arch
.gmap
, addr
);
2068 if (map
->addr
== -EFAULT
) {
2072 ret
= get_user_pages_fast(map
->addr
, 1, 1, &map
->page
);
2076 down_write(&adapter
->maps_lock
);
2077 if (atomic_inc_return(&adapter
->nr_maps
) < MAX_S390_ADAPTER_MAPS
) {
2078 list_add_tail(&map
->list
, &adapter
->maps
);
2081 put_page(map
->page
);
2084 up_write(&adapter
->maps_lock
);
2091 static int kvm_s390_adapter_unmap(struct kvm
*kvm
, unsigned int id
, __u64 addr
)
2093 struct s390_io_adapter
*adapter
= get_io_adapter(kvm
, id
);
2094 struct s390_map_info
*map
, *tmp
;
2097 if (!adapter
|| !addr
)
2100 down_write(&adapter
->maps_lock
);
2101 list_for_each_entry_safe(map
, tmp
, &adapter
->maps
, list
) {
2102 if (map
->guest_addr
== addr
) {
2104 atomic_dec(&adapter
->nr_maps
);
2105 list_del(&map
->list
);
2106 put_page(map
->page
);
2111 up_write(&adapter
->maps_lock
);
2113 return found
? 0 : -EINVAL
;
2116 void kvm_s390_destroy_adapters(struct kvm
*kvm
)
2119 struct s390_map_info
*map
, *tmp
;
2121 for (i
= 0; i
< MAX_S390_IO_ADAPTERS
; i
++) {
2122 if (!kvm
->arch
.adapters
[i
])
2124 list_for_each_entry_safe(map
, tmp
,
2125 &kvm
->arch
.adapters
[i
]->maps
, list
) {
2126 list_del(&map
->list
);
2127 put_page(map
->page
);
2130 kfree(kvm
->arch
.adapters
[i
]);
2134 static int modify_io_adapter(struct kvm_device
*dev
,
2135 struct kvm_device_attr
*attr
)
2137 struct kvm_s390_io_adapter_req req
;
2138 struct s390_io_adapter
*adapter
;
2141 if (copy_from_user(&req
, (void __user
*)attr
->addr
, sizeof(req
)))
2144 adapter
= get_io_adapter(dev
->kvm
, req
.id
);
2148 case KVM_S390_IO_ADAPTER_MASK
:
2149 ret
= kvm_s390_mask_adapter(dev
->kvm
, req
.id
, req
.mask
);
2153 case KVM_S390_IO_ADAPTER_MAP
:
2154 ret
= kvm_s390_adapter_map(dev
->kvm
, req
.id
, req
.addr
);
2156 case KVM_S390_IO_ADAPTER_UNMAP
:
2157 ret
= kvm_s390_adapter_unmap(dev
->kvm
, req
.id
, req
.addr
);
2166 static int clear_io_irq(struct kvm
*kvm
, struct kvm_device_attr
*attr
)
2169 const u64 isc_mask
= 0xffUL
<< 24; /* all iscs set */
2174 if (attr
->attr
!= sizeof(schid
))
2176 if (copy_from_user(&schid
, (void __user
*) attr
->addr
, sizeof(schid
)))
2178 kfree(kvm_s390_get_io_int(kvm
, isc_mask
, schid
));
2180 * If userspace is conforming to the architecture, we can have at most
2181 * one pending I/O interrupt per subchannel, so this is effectively a
2187 static int modify_ais_mode(struct kvm
*kvm
, struct kvm_device_attr
*attr
)
2189 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
2190 struct kvm_s390_ais_req req
;
2193 if (!fi
->ais_enabled
)
2196 if (copy_from_user(&req
, (void __user
*)attr
->addr
, sizeof(req
)))
2199 if (req
.isc
> MAX_ISC
)
2202 trace_kvm_s390_modify_ais_mode(req
.isc
,
2203 (fi
->simm
& AIS_MODE_MASK(req
.isc
)) ?
2204 (fi
->nimm
& AIS_MODE_MASK(req
.isc
)) ?
2205 2 : KVM_S390_AIS_MODE_SINGLE
:
2206 KVM_S390_AIS_MODE_ALL
, req
.mode
);
2208 mutex_lock(&fi
->ais_lock
);
2210 case KVM_S390_AIS_MODE_ALL
:
2211 fi
->simm
&= ~AIS_MODE_MASK(req
.isc
);
2212 fi
->nimm
&= ~AIS_MODE_MASK(req
.isc
);
2214 case KVM_S390_AIS_MODE_SINGLE
:
2215 fi
->simm
|= AIS_MODE_MASK(req
.isc
);
2216 fi
->nimm
&= ~AIS_MODE_MASK(req
.isc
);
2221 mutex_unlock(&fi
->ais_lock
);
2226 static int kvm_s390_inject_airq(struct kvm
*kvm
,
2227 struct s390_io_adapter
*adapter
)
2229 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
2230 struct kvm_s390_interrupt s390int
= {
2231 .type
= KVM_S390_INT_IO(1, 0, 0, 0),
2233 .parm64
= (adapter
->isc
<< 27) | 0x80000000,
2237 if (!fi
->ais_enabled
|| !adapter
->suppressible
)
2238 return kvm_s390_inject_vm(kvm
, &s390int
);
2240 mutex_lock(&fi
->ais_lock
);
2241 if (fi
->nimm
& AIS_MODE_MASK(adapter
->isc
)) {
2242 trace_kvm_s390_airq_suppressed(adapter
->id
, adapter
->isc
);
2246 ret
= kvm_s390_inject_vm(kvm
, &s390int
);
2247 if (!ret
&& (fi
->simm
& AIS_MODE_MASK(adapter
->isc
))) {
2248 fi
->nimm
|= AIS_MODE_MASK(adapter
->isc
);
2249 trace_kvm_s390_modify_ais_mode(adapter
->isc
,
2250 KVM_S390_AIS_MODE_SINGLE
, 2);
2253 mutex_unlock(&fi
->ais_lock
);
2257 static int flic_inject_airq(struct kvm
*kvm
, struct kvm_device_attr
*attr
)
2259 unsigned int id
= attr
->attr
;
2260 struct s390_io_adapter
*adapter
= get_io_adapter(kvm
, id
);
2265 return kvm_s390_inject_airq(kvm
, adapter
);
2268 static int flic_ais_mode_set_all(struct kvm
*kvm
, struct kvm_device_attr
*attr
)
2270 struct kvm_s390_float_interrupt
*fi
= &kvm
->arch
.float_int
;
2271 struct kvm_s390_ais_all ais
;
2273 if (!test_kvm_facility(kvm
, 72))
2276 if (copy_from_user(&ais
, (void __user
*)attr
->addr
, sizeof(ais
)))
2279 mutex_lock(&fi
->ais_lock
);
2280 fi
->simm
= ais
.simm
;
2281 fi
->nimm
= ais
.nimm
;
2282 mutex_unlock(&fi
->ais_lock
);
2287 static int flic_set_attr(struct kvm_device
*dev
, struct kvm_device_attr
*attr
)
2291 struct kvm_vcpu
*vcpu
;
2293 switch (attr
->group
) {
2294 case KVM_DEV_FLIC_ENQUEUE
:
2295 r
= enqueue_floating_irq(dev
, attr
);
2297 case KVM_DEV_FLIC_CLEAR_IRQS
:
2298 kvm_s390_clear_float_irqs(dev
->kvm
);
2300 case KVM_DEV_FLIC_APF_ENABLE
:
2301 dev
->kvm
->arch
.gmap
->pfault_enabled
= 1;
2303 case KVM_DEV_FLIC_APF_DISABLE_WAIT
:
2304 dev
->kvm
->arch
.gmap
->pfault_enabled
= 0;
2306 * Make sure no async faults are in transition when
2307 * clearing the queues. So we don't need to worry
2308 * about late coming workers.
2310 synchronize_srcu(&dev
->kvm
->srcu
);
2311 kvm_for_each_vcpu(i
, vcpu
, dev
->kvm
)
2312 kvm_clear_async_pf_completion_queue(vcpu
);
2314 case KVM_DEV_FLIC_ADAPTER_REGISTER
:
2315 r
= register_io_adapter(dev
, attr
);
2317 case KVM_DEV_FLIC_ADAPTER_MODIFY
:
2318 r
= modify_io_adapter(dev
, attr
);
2320 case KVM_DEV_FLIC_CLEAR_IO_IRQ
:
2321 r
= clear_io_irq(dev
->kvm
, attr
);
2323 case KVM_DEV_FLIC_AISM
:
2324 r
= modify_ais_mode(dev
->kvm
, attr
);
2326 case KVM_DEV_FLIC_AIRQ_INJECT
:
2327 r
= flic_inject_airq(dev
->kvm
, attr
);
2329 case KVM_DEV_FLIC_AISM_ALL
:
2330 r
= flic_ais_mode_set_all(dev
->kvm
, attr
);
2339 static int flic_has_attr(struct kvm_device
*dev
,
2340 struct kvm_device_attr
*attr
)
2342 switch (attr
->group
) {
2343 case KVM_DEV_FLIC_GET_ALL_IRQS
:
2344 case KVM_DEV_FLIC_ENQUEUE
:
2345 case KVM_DEV_FLIC_CLEAR_IRQS
:
2346 case KVM_DEV_FLIC_APF_ENABLE
:
2347 case KVM_DEV_FLIC_APF_DISABLE_WAIT
:
2348 case KVM_DEV_FLIC_ADAPTER_REGISTER
:
2349 case KVM_DEV_FLIC_ADAPTER_MODIFY
:
2350 case KVM_DEV_FLIC_CLEAR_IO_IRQ
:
2351 case KVM_DEV_FLIC_AISM
:
2352 case KVM_DEV_FLIC_AIRQ_INJECT
:
2353 case KVM_DEV_FLIC_AISM_ALL
:
2359 static int flic_create(struct kvm_device
*dev
, u32 type
)
2363 if (dev
->kvm
->arch
.flic
)
2365 dev
->kvm
->arch
.flic
= dev
;
2369 static void flic_destroy(struct kvm_device
*dev
)
2371 dev
->kvm
->arch
.flic
= NULL
;
2375 /* s390 floating irq controller (flic) */
2376 struct kvm_device_ops kvm_flic_ops
= {
2378 .get_attr
= flic_get_attr
,
2379 .set_attr
= flic_set_attr
,
2380 .has_attr
= flic_has_attr
,
2381 .create
= flic_create
,
2382 .destroy
= flic_destroy
,
2385 static unsigned long get_ind_bit(__u64 addr
, unsigned long bit_nr
, bool swap
)
2389 bit
= bit_nr
+ (addr
% PAGE_SIZE
) * 8;
2391 return swap
? (bit
^ (BITS_PER_LONG
- 1)) : bit
;
2394 static struct s390_map_info
*get_map_info(struct s390_io_adapter
*adapter
,
2397 struct s390_map_info
*map
;
2402 list_for_each_entry(map
, &adapter
->maps
, list
) {
2403 if (map
->guest_addr
== addr
)
2409 static int adapter_indicators_set(struct kvm
*kvm
,
2410 struct s390_io_adapter
*adapter
,
2411 struct kvm_s390_adapter_int
*adapter_int
)
2414 int summary_set
, idx
;
2415 struct s390_map_info
*info
;
2418 info
= get_map_info(adapter
, adapter_int
->ind_addr
);
2421 map
= page_address(info
->page
);
2422 bit
= get_ind_bit(info
->addr
, adapter_int
->ind_offset
, adapter
->swap
);
2424 idx
= srcu_read_lock(&kvm
->srcu
);
2425 mark_page_dirty(kvm
, info
->guest_addr
>> PAGE_SHIFT
);
2426 set_page_dirty_lock(info
->page
);
2427 info
= get_map_info(adapter
, adapter_int
->summary_addr
);
2429 srcu_read_unlock(&kvm
->srcu
, idx
);
2432 map
= page_address(info
->page
);
2433 bit
= get_ind_bit(info
->addr
, adapter_int
->summary_offset
,
2435 summary_set
= test_and_set_bit(bit
, map
);
2436 mark_page_dirty(kvm
, info
->guest_addr
>> PAGE_SHIFT
);
2437 set_page_dirty_lock(info
->page
);
2438 srcu_read_unlock(&kvm
->srcu
, idx
);
2439 return summary_set
? 0 : 1;
2443 * < 0 - not injected due to error
2444 * = 0 - coalesced, summary indicator already active
2445 * > 0 - injected interrupt
2447 static int set_adapter_int(struct kvm_kernel_irq_routing_entry
*e
,
2448 struct kvm
*kvm
, int irq_source_id
, int level
,
2452 struct s390_io_adapter
*adapter
;
2454 /* We're only interested in the 0->1 transition. */
2457 adapter
= get_io_adapter(kvm
, e
->adapter
.adapter_id
);
2460 down_read(&adapter
->maps_lock
);
2461 ret
= adapter_indicators_set(kvm
, adapter
, &e
->adapter
);
2462 up_read(&adapter
->maps_lock
);
2463 if ((ret
> 0) && !adapter
->masked
) {
2464 ret
= kvm_s390_inject_airq(kvm
, adapter
);
2472 * Inject the machine check to the guest.
2474 void kvm_s390_reinject_machine_check(struct kvm_vcpu
*vcpu
,
2475 struct mcck_volatile_info
*mcck_info
)
2477 struct kvm_s390_interrupt_info inti
;
2478 struct kvm_s390_irq irq
;
2479 struct kvm_s390_mchk_info
*mchk
;
2481 __u64 cr14
= 0; /* upper bits are not used */
2483 mci
.val
= mcck_info
->mcic
;
2485 cr14
|= MCCK_CR14_RECOVERY_SUB_MASK
;
2487 cr14
|= MCCK_CR14_DEGRAD_SUB_MASK
;
2489 cr14
|= MCCK_CR14_WARN_SUB_MASK
;
2491 mchk
= mci
.ck
? &inti
.mchk
: &irq
.u
.mchk
;
2493 mchk
->mcic
= mcck_info
->mcic
;
2494 mchk
->ext_damage_code
= mcck_info
->ext_damage_code
;
2495 mchk
->failing_storage_address
= mcck_info
->failing_storage_address
;
2497 /* Inject the floating machine check */
2498 inti
.type
= KVM_S390_MCHK
;
2499 WARN_ON_ONCE(__inject_vm(vcpu
->kvm
, &inti
));
2501 /* Inject the machine check to specified vcpu */
2502 irq
.type
= KVM_S390_MCHK
;
2503 WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu
, &irq
));
2507 int kvm_set_routing_entry(struct kvm
*kvm
,
2508 struct kvm_kernel_irq_routing_entry
*e
,
2509 const struct kvm_irq_routing_entry
*ue
)
2514 case KVM_IRQ_ROUTING_S390_ADAPTER
:
2515 e
->set
= set_adapter_int
;
2516 e
->adapter
.summary_addr
= ue
->u
.adapter
.summary_addr
;
2517 e
->adapter
.ind_addr
= ue
->u
.adapter
.ind_addr
;
2518 e
->adapter
.summary_offset
= ue
->u
.adapter
.summary_offset
;
2519 e
->adapter
.ind_offset
= ue
->u
.adapter
.ind_offset
;
2520 e
->adapter
.adapter_id
= ue
->u
.adapter
.adapter_id
;
2530 int kvm_set_msi(struct kvm_kernel_irq_routing_entry
*e
, struct kvm
*kvm
,
2531 int irq_source_id
, int level
, bool line_status
)
2536 int kvm_s390_set_irq_state(struct kvm_vcpu
*vcpu
, void __user
*irqstate
, int len
)
2538 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
2539 struct kvm_s390_irq
*buf
;
2547 if (copy_from_user((void *) buf
, irqstate
, len
)) {
2553 * Don't allow setting the interrupt state
2554 * when there are already interrupts pending
2556 spin_lock(&li
->lock
);
2557 if (li
->pending_irqs
) {
2562 for (n
= 0; n
< len
/ sizeof(*buf
); n
++) {
2563 r
= do_inject_vcpu(vcpu
, &buf
[n
]);
2569 spin_unlock(&li
->lock
);
2576 static void store_local_irq(struct kvm_s390_local_interrupt
*li
,
2577 struct kvm_s390_irq
*irq
,
2578 unsigned long irq_type
)
2581 case IRQ_PEND_MCHK_EX
:
2582 case IRQ_PEND_MCHK_REP
:
2583 irq
->type
= KVM_S390_MCHK
;
2584 irq
->u
.mchk
= li
->irq
.mchk
;
2587 irq
->type
= KVM_S390_PROGRAM_INT
;
2588 irq
->u
.pgm
= li
->irq
.pgm
;
2590 case IRQ_PEND_PFAULT_INIT
:
2591 irq
->type
= KVM_S390_INT_PFAULT_INIT
;
2592 irq
->u
.ext
= li
->irq
.ext
;
2594 case IRQ_PEND_EXT_EXTERNAL
:
2595 irq
->type
= KVM_S390_INT_EXTERNAL_CALL
;
2596 irq
->u
.extcall
= li
->irq
.extcall
;
2598 case IRQ_PEND_EXT_CLOCK_COMP
:
2599 irq
->type
= KVM_S390_INT_CLOCK_COMP
;
2601 case IRQ_PEND_EXT_CPU_TIMER
:
2602 irq
->type
= KVM_S390_INT_CPU_TIMER
;
2604 case IRQ_PEND_SIGP_STOP
:
2605 irq
->type
= KVM_S390_SIGP_STOP
;
2606 irq
->u
.stop
= li
->irq
.stop
;
2608 case IRQ_PEND_RESTART
:
2609 irq
->type
= KVM_S390_RESTART
;
2611 case IRQ_PEND_SET_PREFIX
:
2612 irq
->type
= KVM_S390_SIGP_SET_PREFIX
;
2613 irq
->u
.prefix
= li
->irq
.prefix
;
2618 int kvm_s390_get_irq_state(struct kvm_vcpu
*vcpu
, __u8 __user
*buf
, int len
)
2621 unsigned long sigp_emerg_pending
[BITS_TO_LONGS(KVM_MAX_VCPUS
)];
2622 struct kvm_s390_local_interrupt
*li
= &vcpu
->arch
.local_int
;
2623 unsigned long pending_irqs
;
2624 struct kvm_s390_irq irq
;
2625 unsigned long irq_type
;
2629 spin_lock(&li
->lock
);
2630 pending_irqs
= li
->pending_irqs
;
2631 memcpy(&sigp_emerg_pending
, &li
->sigp_emerg_pending
,
2632 sizeof(sigp_emerg_pending
));
2633 spin_unlock(&li
->lock
);
2635 for_each_set_bit(irq_type
, &pending_irqs
, IRQ_PEND_COUNT
) {
2636 memset(&irq
, 0, sizeof(irq
));
2637 if (irq_type
== IRQ_PEND_EXT_EMERGENCY
)
2639 if (n
+ sizeof(irq
) > len
)
2641 store_local_irq(&vcpu
->arch
.local_int
, &irq
, irq_type
);
2642 if (copy_to_user(&buf
[n
], &irq
, sizeof(irq
)))
2647 if (test_bit(IRQ_PEND_EXT_EMERGENCY
, &pending_irqs
)) {
2648 for_each_set_bit(cpuaddr
, sigp_emerg_pending
, KVM_MAX_VCPUS
) {
2649 memset(&irq
, 0, sizeof(irq
));
2650 if (n
+ sizeof(irq
) > len
)
2652 irq
.type
= KVM_S390_INT_EMERGENCY
;
2653 irq
.u
.emerg
.code
= cpuaddr
;
2654 if (copy_to_user(&buf
[n
], &irq
, sizeof(irq
)))
2660 if (sca_ext_call_pending(vcpu
, &scn
)) {
2661 if (n
+ sizeof(irq
) > len
)
2663 memset(&irq
, 0, sizeof(irq
));
2664 irq
.type
= KVM_S390_INT_EXTERNAL_CALL
;
2665 irq
.u
.extcall
.code
= scn
;
2666 if (copy_to_user(&buf
[n
], &irq
, sizeof(irq
)))