2 * hosting zSeries kernel virtual machines
4 * Copyright IBM Corp. 2008, 2009
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>
11 * Christian Borntraeger <borntraeger@de.ibm.com>
12 * Heiko Carstens <heiko.carstens@de.ibm.com>
13 * Christian Ehrhardt <ehrhardt@de.ibm.com>
16 #include <linux/compiler.h>
17 #include <linux/err.h>
19 #include <linux/hrtimer.h>
20 #include <linux/init.h>
21 #include <linux/kvm.h>
22 #include <linux/kvm_host.h>
23 #include <linux/module.h>
24 #include <linux/slab.h>
25 #include <linux/timer.h>
26 #include <asm/asm-offsets.h>
27 #include <asm/lowcore.h>
28 #include <asm/pgtable.h>
30 #include <asm/switch_to.h>
35 #define CREATE_TRACE_POINTS
37 #include "trace-s390.h"
39 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
41 struct kvm_stats_debugfs_item debugfs_entries
[] = {
42 { "userspace_handled", VCPU_STAT(exit_userspace
) },
43 { "exit_null", VCPU_STAT(exit_null
) },
44 { "exit_validity", VCPU_STAT(exit_validity
) },
45 { "exit_stop_request", VCPU_STAT(exit_stop_request
) },
46 { "exit_external_request", VCPU_STAT(exit_external_request
) },
47 { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt
) },
48 { "exit_instruction", VCPU_STAT(exit_instruction
) },
49 { "exit_program_interruption", VCPU_STAT(exit_program_interruption
) },
50 { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program
) },
51 { "instruction_lctlg", VCPU_STAT(instruction_lctlg
) },
52 { "instruction_lctl", VCPU_STAT(instruction_lctl
) },
53 { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal
) },
54 { "deliver_external_call", VCPU_STAT(deliver_external_call
) },
55 { "deliver_service_signal", VCPU_STAT(deliver_service_signal
) },
56 { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt
) },
57 { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal
) },
58 { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal
) },
59 { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal
) },
60 { "deliver_program_interruption", VCPU_STAT(deliver_program_int
) },
61 { "exit_wait_state", VCPU_STAT(exit_wait_state
) },
62 { "instruction_stidp", VCPU_STAT(instruction_stidp
) },
63 { "instruction_spx", VCPU_STAT(instruction_spx
) },
64 { "instruction_stpx", VCPU_STAT(instruction_stpx
) },
65 { "instruction_stap", VCPU_STAT(instruction_stap
) },
66 { "instruction_storage_key", VCPU_STAT(instruction_storage_key
) },
67 { "instruction_stsch", VCPU_STAT(instruction_stsch
) },
68 { "instruction_chsc", VCPU_STAT(instruction_chsc
) },
69 { "instruction_stsi", VCPU_STAT(instruction_stsi
) },
70 { "instruction_stfl", VCPU_STAT(instruction_stfl
) },
71 { "instruction_tprot", VCPU_STAT(instruction_tprot
) },
72 { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense
) },
73 { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running
) },
74 { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call
) },
75 { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency
) },
76 { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop
) },
77 { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch
) },
78 { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix
) },
79 { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart
) },
80 { "diagnose_10", VCPU_STAT(diagnose_10
) },
81 { "diagnose_44", VCPU_STAT(diagnose_44
) },
82 { "diagnose_9c", VCPU_STAT(diagnose_9c
) },
86 static unsigned long long *facilities
;
88 /* Section: not file related */
89 int kvm_arch_hardware_enable(void *garbage
)
91 /* every s390 is virtualization enabled ;-) */
95 void kvm_arch_hardware_disable(void *garbage
)
99 int kvm_arch_hardware_setup(void)
104 void kvm_arch_hardware_unsetup(void)
108 void kvm_arch_check_processor_compat(void *rtn
)
112 int kvm_arch_init(void *opaque
)
117 void kvm_arch_exit(void)
121 /* Section: device related */
122 long kvm_arch_dev_ioctl(struct file
*filp
,
123 unsigned int ioctl
, unsigned long arg
)
125 if (ioctl
== KVM_S390_ENABLE_SIE
)
126 return s390_enable_sie();
130 int kvm_dev_ioctl_check_extension(long ext
)
135 case KVM_CAP_S390_PSW
:
136 case KVM_CAP_S390_GMAP
:
137 case KVM_CAP_SYNC_MMU
:
138 #ifdef CONFIG_KVM_S390_UCONTROL
139 case KVM_CAP_S390_UCONTROL
:
141 case KVM_CAP_SYNC_REGS
:
142 case KVM_CAP_ONE_REG
:
145 case KVM_CAP_NR_VCPUS
:
146 case KVM_CAP_MAX_VCPUS
:
149 case KVM_CAP_S390_COW
:
150 r
= MACHINE_HAS_ESOP
;
158 /* Section: vm related */
160 * Get (and clear) the dirty memory log for a memory slot.
162 int kvm_vm_ioctl_get_dirty_log(struct kvm
*kvm
,
163 struct kvm_dirty_log
*log
)
168 long kvm_arch_vm_ioctl(struct file
*filp
,
169 unsigned int ioctl
, unsigned long arg
)
171 struct kvm
*kvm
= filp
->private_data
;
172 void __user
*argp
= (void __user
*)arg
;
176 case KVM_S390_INTERRUPT
: {
177 struct kvm_s390_interrupt s390int
;
180 if (copy_from_user(&s390int
, argp
, sizeof(s390int
)))
182 r
= kvm_s390_inject_vm(kvm
, &s390int
);
192 int kvm_arch_init_vm(struct kvm
*kvm
, unsigned long type
)
198 #ifdef CONFIG_KVM_S390_UCONTROL
199 if (type
& ~KVM_VM_S390_UCONTROL
)
201 if ((type
& KVM_VM_S390_UCONTROL
) && (!capable(CAP_SYS_ADMIN
)))
208 rc
= s390_enable_sie();
214 kvm
->arch
.sca
= (struct sca_block
*) get_zeroed_page(GFP_KERNEL
);
218 sprintf(debug_name
, "kvm-%u", current
->pid
);
220 kvm
->arch
.dbf
= debug_register(debug_name
, 8, 2, 8 * sizeof(long));
224 spin_lock_init(&kvm
->arch
.float_int
.lock
);
225 INIT_LIST_HEAD(&kvm
->arch
.float_int
.list
);
227 debug_register_view(kvm
->arch
.dbf
, &debug_sprintf_view
);
228 VM_EVENT(kvm
, 3, "%s", "vm created");
230 if (type
& KVM_VM_S390_UCONTROL
) {
231 kvm
->arch
.gmap
= NULL
;
233 kvm
->arch
.gmap
= gmap_alloc(current
->mm
);
239 debug_unregister(kvm
->arch
.dbf
);
241 free_page((unsigned long)(kvm
->arch
.sca
));
246 void kvm_arch_vcpu_destroy(struct kvm_vcpu
*vcpu
)
248 VCPU_EVENT(vcpu
, 3, "%s", "free cpu");
249 trace_kvm_s390_destroy_vcpu(vcpu
->vcpu_id
);
250 if (!kvm_is_ucontrol(vcpu
->kvm
)) {
251 clear_bit(63 - vcpu
->vcpu_id
,
252 (unsigned long *) &vcpu
->kvm
->arch
.sca
->mcn
);
253 if (vcpu
->kvm
->arch
.sca
->cpu
[vcpu
->vcpu_id
].sda
==
254 (__u64
) vcpu
->arch
.sie_block
)
255 vcpu
->kvm
->arch
.sca
->cpu
[vcpu
->vcpu_id
].sda
= 0;
259 if (kvm_is_ucontrol(vcpu
->kvm
))
260 gmap_free(vcpu
->arch
.gmap
);
262 free_page((unsigned long)(vcpu
->arch
.sie_block
));
263 kvm_vcpu_uninit(vcpu
);
267 static void kvm_free_vcpus(struct kvm
*kvm
)
270 struct kvm_vcpu
*vcpu
;
272 kvm_for_each_vcpu(i
, vcpu
, kvm
)
273 kvm_arch_vcpu_destroy(vcpu
);
275 mutex_lock(&kvm
->lock
);
276 for (i
= 0; i
< atomic_read(&kvm
->online_vcpus
); i
++)
277 kvm
->vcpus
[i
] = NULL
;
279 atomic_set(&kvm
->online_vcpus
, 0);
280 mutex_unlock(&kvm
->lock
);
283 void kvm_arch_sync_events(struct kvm
*kvm
)
287 void kvm_arch_destroy_vm(struct kvm
*kvm
)
290 free_page((unsigned long)(kvm
->arch
.sca
));
291 debug_unregister(kvm
->arch
.dbf
);
292 if (!kvm_is_ucontrol(kvm
))
293 gmap_free(kvm
->arch
.gmap
);
296 /* Section: vcpu related */
297 int kvm_arch_vcpu_init(struct kvm_vcpu
*vcpu
)
299 if (kvm_is_ucontrol(vcpu
->kvm
)) {
300 vcpu
->arch
.gmap
= gmap_alloc(current
->mm
);
301 if (!vcpu
->arch
.gmap
)
306 vcpu
->arch
.gmap
= vcpu
->kvm
->arch
.gmap
;
307 vcpu
->run
->kvm_valid_regs
= KVM_SYNC_PREFIX
|
314 void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
)
319 void kvm_arch_vcpu_load(struct kvm_vcpu
*vcpu
, int cpu
)
321 save_fp_regs(&vcpu
->arch
.host_fpregs
);
322 save_access_regs(vcpu
->arch
.host_acrs
);
323 vcpu
->arch
.guest_fpregs
.fpc
&= FPC_VALID_MASK
;
324 restore_fp_regs(&vcpu
->arch
.guest_fpregs
);
325 restore_access_regs(vcpu
->run
->s
.regs
.acrs
);
326 gmap_enable(vcpu
->arch
.gmap
);
327 atomic_set_mask(CPUSTAT_RUNNING
, &vcpu
->arch
.sie_block
->cpuflags
);
330 void kvm_arch_vcpu_put(struct kvm_vcpu
*vcpu
)
332 atomic_clear_mask(CPUSTAT_RUNNING
, &vcpu
->arch
.sie_block
->cpuflags
);
333 gmap_disable(vcpu
->arch
.gmap
);
334 save_fp_regs(&vcpu
->arch
.guest_fpregs
);
335 save_access_regs(vcpu
->run
->s
.regs
.acrs
);
336 restore_fp_regs(&vcpu
->arch
.host_fpregs
);
337 restore_access_regs(vcpu
->arch
.host_acrs
);
340 static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu
*vcpu
)
342 /* this equals initial cpu reset in pop, but we don't switch to ESA */
343 vcpu
->arch
.sie_block
->gpsw
.mask
= 0UL;
344 vcpu
->arch
.sie_block
->gpsw
.addr
= 0UL;
345 kvm_s390_set_prefix(vcpu
, 0);
346 vcpu
->arch
.sie_block
->cputm
= 0UL;
347 vcpu
->arch
.sie_block
->ckc
= 0UL;
348 vcpu
->arch
.sie_block
->todpr
= 0;
349 memset(vcpu
->arch
.sie_block
->gcr
, 0, 16 * sizeof(__u64
));
350 vcpu
->arch
.sie_block
->gcr
[0] = 0xE0UL
;
351 vcpu
->arch
.sie_block
->gcr
[14] = 0xC2000000UL
;
352 vcpu
->arch
.guest_fpregs
.fpc
= 0;
353 asm volatile("lfpc %0" : : "Q" (vcpu
->arch
.guest_fpregs
.fpc
));
354 vcpu
->arch
.sie_block
->gbea
= 1;
355 atomic_set_mask(CPUSTAT_STOPPED
, &vcpu
->arch
.sie_block
->cpuflags
);
358 int kvm_arch_vcpu_postcreate(struct kvm_vcpu
*vcpu
)
363 int kvm_arch_vcpu_setup(struct kvm_vcpu
*vcpu
)
365 atomic_set(&vcpu
->arch
.sie_block
->cpuflags
, CPUSTAT_ZARCH
|
368 vcpu
->arch
.sie_block
->ecb
= 6;
369 vcpu
->arch
.sie_block
->eca
= 0xC1002001U
;
370 vcpu
->arch
.sie_block
->fac
= (int) (long) facilities
;
371 hrtimer_init(&vcpu
->arch
.ckc_timer
, CLOCK_REALTIME
, HRTIMER_MODE_ABS
);
372 tasklet_init(&vcpu
->arch
.tasklet
, kvm_s390_tasklet
,
373 (unsigned long) vcpu
);
374 vcpu
->arch
.ckc_timer
.function
= kvm_s390_idle_wakeup
;
375 get_cpu_id(&vcpu
->arch
.cpu_id
);
376 vcpu
->arch
.cpu_id
.version
= 0xff;
380 struct kvm_vcpu
*kvm_arch_vcpu_create(struct kvm
*kvm
,
383 struct kvm_vcpu
*vcpu
;
386 if (id
>= KVM_MAX_VCPUS
)
391 vcpu
= kzalloc(sizeof(struct kvm_vcpu
), GFP_KERNEL
);
395 vcpu
->arch
.sie_block
= (struct kvm_s390_sie_block
*)
396 get_zeroed_page(GFP_KERNEL
);
398 if (!vcpu
->arch
.sie_block
)
401 vcpu
->arch
.sie_block
->icpua
= id
;
402 if (!kvm_is_ucontrol(kvm
)) {
403 if (!kvm
->arch
.sca
) {
407 if (!kvm
->arch
.sca
->cpu
[id
].sda
)
408 kvm
->arch
.sca
->cpu
[id
].sda
=
409 (__u64
) vcpu
->arch
.sie_block
;
410 vcpu
->arch
.sie_block
->scaoh
=
411 (__u32
)(((__u64
)kvm
->arch
.sca
) >> 32);
412 vcpu
->arch
.sie_block
->scaol
= (__u32
)(__u64
)kvm
->arch
.sca
;
413 set_bit(63 - id
, (unsigned long *) &kvm
->arch
.sca
->mcn
);
416 spin_lock_init(&vcpu
->arch
.local_int
.lock
);
417 INIT_LIST_HEAD(&vcpu
->arch
.local_int
.list
);
418 vcpu
->arch
.local_int
.float_int
= &kvm
->arch
.float_int
;
419 spin_lock(&kvm
->arch
.float_int
.lock
);
420 kvm
->arch
.float_int
.local_int
[id
] = &vcpu
->arch
.local_int
;
421 init_waitqueue_head(&vcpu
->arch
.local_int
.wq
);
422 vcpu
->arch
.local_int
.cpuflags
= &vcpu
->arch
.sie_block
->cpuflags
;
423 spin_unlock(&kvm
->arch
.float_int
.lock
);
425 rc
= kvm_vcpu_init(vcpu
, kvm
, id
);
427 goto out_free_sie_block
;
428 VM_EVENT(kvm
, 3, "create cpu %d at %p, sie block at %p", id
, vcpu
,
429 vcpu
->arch
.sie_block
);
430 trace_kvm_s390_create_vcpu(id
, vcpu
, vcpu
->arch
.sie_block
);
434 free_page((unsigned long)(vcpu
->arch
.sie_block
));
441 int kvm_arch_vcpu_runnable(struct kvm_vcpu
*vcpu
)
443 /* kvm common code refers to this, but never calls it */
448 int kvm_arch_vcpu_should_kick(struct kvm_vcpu
*vcpu
)
450 /* kvm common code refers to this, but never calls it */
455 static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu
*vcpu
,
456 struct kvm_one_reg
*reg
)
461 case KVM_REG_S390_TODPR
:
462 r
= put_user(vcpu
->arch
.sie_block
->todpr
,
463 (u32 __user
*)reg
->addr
);
465 case KVM_REG_S390_EPOCHDIFF
:
466 r
= put_user(vcpu
->arch
.sie_block
->epoch
,
467 (u64 __user
*)reg
->addr
);
469 case KVM_REG_S390_CPU_TIMER
:
470 r
= put_user(vcpu
->arch
.sie_block
->cputm
,
471 (u64 __user
*)reg
->addr
);
473 case KVM_REG_S390_CLOCK_COMP
:
474 r
= put_user(vcpu
->arch
.sie_block
->ckc
,
475 (u64 __user
*)reg
->addr
);
484 static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu
*vcpu
,
485 struct kvm_one_reg
*reg
)
490 case KVM_REG_S390_TODPR
:
491 r
= get_user(vcpu
->arch
.sie_block
->todpr
,
492 (u32 __user
*)reg
->addr
);
494 case KVM_REG_S390_EPOCHDIFF
:
495 r
= get_user(vcpu
->arch
.sie_block
->epoch
,
496 (u64 __user
*)reg
->addr
);
498 case KVM_REG_S390_CPU_TIMER
:
499 r
= get_user(vcpu
->arch
.sie_block
->cputm
,
500 (u64 __user
*)reg
->addr
);
502 case KVM_REG_S390_CLOCK_COMP
:
503 r
= get_user(vcpu
->arch
.sie_block
->ckc
,
504 (u64 __user
*)reg
->addr
);
513 static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu
*vcpu
)
515 kvm_s390_vcpu_initial_reset(vcpu
);
519 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
521 memcpy(&vcpu
->run
->s
.regs
.gprs
, ®s
->gprs
, sizeof(regs
->gprs
));
525 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu
*vcpu
, struct kvm_regs
*regs
)
527 memcpy(®s
->gprs
, &vcpu
->run
->s
.regs
.gprs
, sizeof(regs
->gprs
));
531 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu
*vcpu
,
532 struct kvm_sregs
*sregs
)
534 memcpy(&vcpu
->run
->s
.regs
.acrs
, &sregs
->acrs
, sizeof(sregs
->acrs
));
535 memcpy(&vcpu
->arch
.sie_block
->gcr
, &sregs
->crs
, sizeof(sregs
->crs
));
536 restore_access_regs(vcpu
->run
->s
.regs
.acrs
);
540 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu
*vcpu
,
541 struct kvm_sregs
*sregs
)
543 memcpy(&sregs
->acrs
, &vcpu
->run
->s
.regs
.acrs
, sizeof(sregs
->acrs
));
544 memcpy(&sregs
->crs
, &vcpu
->arch
.sie_block
->gcr
, sizeof(sregs
->crs
));
548 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
550 memcpy(&vcpu
->arch
.guest_fpregs
.fprs
, &fpu
->fprs
, sizeof(fpu
->fprs
));
551 vcpu
->arch
.guest_fpregs
.fpc
= fpu
->fpc
& FPC_VALID_MASK
;
552 restore_fp_regs(&vcpu
->arch
.guest_fpregs
);
556 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu
*vcpu
, struct kvm_fpu
*fpu
)
558 memcpy(&fpu
->fprs
, &vcpu
->arch
.guest_fpregs
.fprs
, sizeof(fpu
->fprs
));
559 fpu
->fpc
= vcpu
->arch
.guest_fpregs
.fpc
;
563 static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu
*vcpu
, psw_t psw
)
567 if (!(atomic_read(&vcpu
->arch
.sie_block
->cpuflags
) & CPUSTAT_STOPPED
))
570 vcpu
->run
->psw_mask
= psw
.mask
;
571 vcpu
->run
->psw_addr
= psw
.addr
;
576 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu
*vcpu
,
577 struct kvm_translation
*tr
)
579 return -EINVAL
; /* not implemented yet */
582 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu
*vcpu
,
583 struct kvm_guest_debug
*dbg
)
585 return -EINVAL
; /* not implemented yet */
588 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu
*vcpu
,
589 struct kvm_mp_state
*mp_state
)
591 return -EINVAL
; /* not implemented yet */
594 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu
,
595 struct kvm_mp_state
*mp_state
)
597 return -EINVAL
; /* not implemented yet */
600 static int __vcpu_run(struct kvm_vcpu
*vcpu
)
604 memcpy(&vcpu
->arch
.sie_block
->gg14
, &vcpu
->run
->s
.regs
.gprs
[14], 16);
609 if (test_thread_flag(TIF_MCCK_PENDING
))
612 if (!kvm_is_ucontrol(vcpu
->kvm
))
613 kvm_s390_deliver_pending_interrupts(vcpu
);
615 vcpu
->arch
.sie_block
->icptcode
= 0;
619 VCPU_EVENT(vcpu
, 6, "entering sie flags %x",
620 atomic_read(&vcpu
->arch
.sie_block
->cpuflags
));
621 trace_kvm_s390_sie_enter(vcpu
,
622 atomic_read(&vcpu
->arch
.sie_block
->cpuflags
));
623 rc
= sie64a(vcpu
->arch
.sie_block
, vcpu
->run
->s
.regs
.gprs
);
625 if (kvm_is_ucontrol(vcpu
->kvm
)) {
626 rc
= SIE_INTERCEPT_UCONTROL
;
628 VCPU_EVENT(vcpu
, 3, "%s", "fault in sie instruction");
629 trace_kvm_s390_sie_fault(vcpu
);
630 kvm_s390_inject_program_int(vcpu
, PGM_ADDRESSING
);
634 VCPU_EVENT(vcpu
, 6, "exit sie icptcode %d",
635 vcpu
->arch
.sie_block
->icptcode
);
636 trace_kvm_s390_sie_exit(vcpu
, vcpu
->arch
.sie_block
->icptcode
);
639 memcpy(&vcpu
->run
->s
.regs
.gprs
[14], &vcpu
->arch
.sie_block
->gg14
, 16);
643 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu
*vcpu
, struct kvm_run
*kvm_run
)
649 if (vcpu
->sigset_active
)
650 sigprocmask(SIG_SETMASK
, &vcpu
->sigset
, &sigsaved
);
652 atomic_clear_mask(CPUSTAT_STOPPED
, &vcpu
->arch
.sie_block
->cpuflags
);
654 BUG_ON(vcpu
->kvm
->arch
.float_int
.local_int
[vcpu
->vcpu_id
] == NULL
);
656 switch (kvm_run
->exit_reason
) {
657 case KVM_EXIT_S390_SIEIC
:
658 case KVM_EXIT_UNKNOWN
:
660 case KVM_EXIT_S390_RESET
:
661 case KVM_EXIT_S390_UCONTROL
:
667 vcpu
->arch
.sie_block
->gpsw
.mask
= kvm_run
->psw_mask
;
668 vcpu
->arch
.sie_block
->gpsw
.addr
= kvm_run
->psw_addr
;
669 if (kvm_run
->kvm_dirty_regs
& KVM_SYNC_PREFIX
) {
670 kvm_run
->kvm_dirty_regs
&= ~KVM_SYNC_PREFIX
;
671 kvm_s390_set_prefix(vcpu
, kvm_run
->s
.regs
.prefix
);
673 if (kvm_run
->kvm_dirty_regs
& KVM_SYNC_CRS
) {
674 kvm_run
->kvm_dirty_regs
&= ~KVM_SYNC_CRS
;
675 memcpy(&vcpu
->arch
.sie_block
->gcr
, &kvm_run
->s
.regs
.crs
, 128);
676 kvm_s390_set_prefix(vcpu
, kvm_run
->s
.regs
.prefix
);
682 rc
= __vcpu_run(vcpu
);
685 if (kvm_is_ucontrol(vcpu
->kvm
))
688 rc
= kvm_handle_sie_intercept(vcpu
);
689 } while (!signal_pending(current
) && !rc
);
691 if (rc
== SIE_INTERCEPT_RERUNVCPU
)
694 if (signal_pending(current
) && !rc
) {
695 kvm_run
->exit_reason
= KVM_EXIT_INTR
;
699 #ifdef CONFIG_KVM_S390_UCONTROL
700 if (rc
== SIE_INTERCEPT_UCONTROL
) {
701 kvm_run
->exit_reason
= KVM_EXIT_S390_UCONTROL
;
702 kvm_run
->s390_ucontrol
.trans_exc_code
=
703 current
->thread
.gmap_addr
;
704 kvm_run
->s390_ucontrol
.pgm_code
= 0x10;
709 if (rc
== -EOPNOTSUPP
) {
710 /* intercept cannot be handled in-kernel, prepare kvm-run */
711 kvm_run
->exit_reason
= KVM_EXIT_S390_SIEIC
;
712 kvm_run
->s390_sieic
.icptcode
= vcpu
->arch
.sie_block
->icptcode
;
713 kvm_run
->s390_sieic
.ipa
= vcpu
->arch
.sie_block
->ipa
;
714 kvm_run
->s390_sieic
.ipb
= vcpu
->arch
.sie_block
->ipb
;
718 if (rc
== -EREMOTE
) {
719 /* intercept was handled, but userspace support is needed
720 * kvm_run has been prepared by the handler */
724 kvm_run
->psw_mask
= vcpu
->arch
.sie_block
->gpsw
.mask
;
725 kvm_run
->psw_addr
= vcpu
->arch
.sie_block
->gpsw
.addr
;
726 kvm_run
->s
.regs
.prefix
= vcpu
->arch
.sie_block
->prefix
;
727 memcpy(&kvm_run
->s
.regs
.crs
, &vcpu
->arch
.sie_block
->gcr
, 128);
729 if (vcpu
->sigset_active
)
730 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
732 vcpu
->stat
.exit_userspace
++;
736 static int __guestcopy(struct kvm_vcpu
*vcpu
, u64 guestdest
, void *from
,
737 unsigned long n
, int prefix
)
740 return copy_to_guest(vcpu
, guestdest
, from
, n
);
742 return copy_to_guest_absolute(vcpu
, guestdest
, from
, n
);
746 * store status at address
747 * we use have two special cases:
748 * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
749 * KVM_S390_STORE_STATUS_PREFIXED: -> prefix
751 int kvm_s390_vcpu_store_status(struct kvm_vcpu
*vcpu
, unsigned long addr
)
753 unsigned char archmode
= 1;
756 if (addr
== KVM_S390_STORE_STATUS_NOADDR
) {
757 if (copy_to_guest_absolute(vcpu
, 163ul, &archmode
, 1))
759 addr
= SAVE_AREA_BASE
;
761 } else if (addr
== KVM_S390_STORE_STATUS_PREFIXED
) {
762 if (copy_to_guest(vcpu
, 163ul, &archmode
, 1))
764 addr
= SAVE_AREA_BASE
;
769 if (__guestcopy(vcpu
, addr
+ offsetof(struct save_area
, fp_regs
),
770 vcpu
->arch
.guest_fpregs
.fprs
, 128, prefix
))
773 if (__guestcopy(vcpu
, addr
+ offsetof(struct save_area
, gp_regs
),
774 vcpu
->run
->s
.regs
.gprs
, 128, prefix
))
777 if (__guestcopy(vcpu
, addr
+ offsetof(struct save_area
, psw
),
778 &vcpu
->arch
.sie_block
->gpsw
, 16, prefix
))
781 if (__guestcopy(vcpu
, addr
+ offsetof(struct save_area
, pref_reg
),
782 &vcpu
->arch
.sie_block
->prefix
, 4, prefix
))
785 if (__guestcopy(vcpu
,
786 addr
+ offsetof(struct save_area
, fp_ctrl_reg
),
787 &vcpu
->arch
.guest_fpregs
.fpc
, 4, prefix
))
790 if (__guestcopy(vcpu
, addr
+ offsetof(struct save_area
, tod_reg
),
791 &vcpu
->arch
.sie_block
->todpr
, 4, prefix
))
794 if (__guestcopy(vcpu
, addr
+ offsetof(struct save_area
, timer
),
795 &vcpu
->arch
.sie_block
->cputm
, 8, prefix
))
798 if (__guestcopy(vcpu
, addr
+ offsetof(struct save_area
, clk_cmp
),
799 &vcpu
->arch
.sie_block
->ckc
, 8, prefix
))
802 if (__guestcopy(vcpu
, addr
+ offsetof(struct save_area
, acc_regs
),
803 &vcpu
->run
->s
.regs
.acrs
, 64, prefix
))
806 if (__guestcopy(vcpu
,
807 addr
+ offsetof(struct save_area
, ctrl_regs
),
808 &vcpu
->arch
.sie_block
->gcr
, 128, prefix
))
813 long kvm_arch_vcpu_ioctl(struct file
*filp
,
814 unsigned int ioctl
, unsigned long arg
)
816 struct kvm_vcpu
*vcpu
= filp
->private_data
;
817 void __user
*argp
= (void __user
*)arg
;
821 case KVM_S390_INTERRUPT
: {
822 struct kvm_s390_interrupt s390int
;
825 if (copy_from_user(&s390int
, argp
, sizeof(s390int
)))
827 r
= kvm_s390_inject_vcpu(vcpu
, &s390int
);
830 case KVM_S390_STORE_STATUS
:
831 r
= kvm_s390_vcpu_store_status(vcpu
, arg
);
833 case KVM_S390_SET_INITIAL_PSW
: {
837 if (copy_from_user(&psw
, argp
, sizeof(psw
)))
839 r
= kvm_arch_vcpu_ioctl_set_initial_psw(vcpu
, psw
);
842 case KVM_S390_INITIAL_RESET
:
843 r
= kvm_arch_vcpu_ioctl_initial_reset(vcpu
);
845 case KVM_SET_ONE_REG
:
846 case KVM_GET_ONE_REG
: {
847 struct kvm_one_reg reg
;
849 if (copy_from_user(®
, argp
, sizeof(reg
)))
851 if (ioctl
== KVM_SET_ONE_REG
)
852 r
= kvm_arch_vcpu_ioctl_set_one_reg(vcpu
, ®
);
854 r
= kvm_arch_vcpu_ioctl_get_one_reg(vcpu
, ®
);
857 #ifdef CONFIG_KVM_S390_UCONTROL
858 case KVM_S390_UCAS_MAP
: {
859 struct kvm_s390_ucas_mapping ucasmap
;
861 if (copy_from_user(&ucasmap
, argp
, sizeof(ucasmap
))) {
866 if (!kvm_is_ucontrol(vcpu
->kvm
)) {
871 r
= gmap_map_segment(vcpu
->arch
.gmap
, ucasmap
.user_addr
,
872 ucasmap
.vcpu_addr
, ucasmap
.length
);
875 case KVM_S390_UCAS_UNMAP
: {
876 struct kvm_s390_ucas_mapping ucasmap
;
878 if (copy_from_user(&ucasmap
, argp
, sizeof(ucasmap
))) {
883 if (!kvm_is_ucontrol(vcpu
->kvm
)) {
888 r
= gmap_unmap_segment(vcpu
->arch
.gmap
, ucasmap
.vcpu_addr
,
893 case KVM_S390_VCPU_FAULT
: {
894 r
= gmap_fault(arg
, vcpu
->arch
.gmap
);
895 if (!IS_ERR_VALUE(r
))
905 int kvm_arch_vcpu_fault(struct kvm_vcpu
*vcpu
, struct vm_fault
*vmf
)
907 #ifdef CONFIG_KVM_S390_UCONTROL
908 if ((vmf
->pgoff
== KVM_S390_SIE_PAGE_OFFSET
)
909 && (kvm_is_ucontrol(vcpu
->kvm
))) {
910 vmf
->page
= virt_to_page(vcpu
->arch
.sie_block
);
915 return VM_FAULT_SIGBUS
;
918 void kvm_arch_free_memslot(struct kvm_memory_slot
*free
,
919 struct kvm_memory_slot
*dont
)
923 int kvm_arch_create_memslot(struct kvm_memory_slot
*slot
, unsigned long npages
)
928 /* Section: memory related */
929 int kvm_arch_prepare_memory_region(struct kvm
*kvm
,
930 struct kvm_memory_slot
*memslot
,
931 struct kvm_memory_slot old
,
932 struct kvm_userspace_memory_region
*mem
,
935 /* A few sanity checks. We can have exactly one memory slot which has
936 to start at guest virtual zero and which has to be located at a
937 page boundary in userland and which has to end at a page boundary.
938 The memory in userland is ok to be fragmented into various different
939 vmas. It is okay to mmap() and munmap() stuff in this slot after
940 doing this call at any time */
945 if (mem
->guest_phys_addr
)
948 if (mem
->userspace_addr
& 0xffffful
)
951 if (mem
->memory_size
& 0xffffful
)
960 void kvm_arch_commit_memory_region(struct kvm
*kvm
,
961 struct kvm_userspace_memory_region
*mem
,
962 struct kvm_memory_slot old
,
968 rc
= gmap_map_segment(kvm
->arch
.gmap
, mem
->userspace_addr
,
969 mem
->guest_phys_addr
, mem
->memory_size
);
971 printk(KERN_WARNING
"kvm-s390: failed to commit memory region\n");
975 void kvm_arch_flush_shadow_all(struct kvm
*kvm
)
979 void kvm_arch_flush_shadow_memslot(struct kvm
*kvm
,
980 struct kvm_memory_slot
*slot
)
984 static int __init
kvm_s390_init(void)
987 ret
= kvm_init(NULL
, sizeof(struct kvm_vcpu
), 0, THIS_MODULE
);
992 * guests can ask for up to 255+1 double words, we need a full page
993 * to hold the maximum amount of facilities. On the other hand, we
994 * only set facilities that are known to work in KVM.
996 facilities
= (unsigned long long *) get_zeroed_page(GFP_KERNEL
|GFP_DMA
);
1001 memcpy(facilities
, S390_lowcore
.stfle_fac_list
, 16);
1002 facilities
[0] &= 0xff00fff3f47c0000ULL
;
1003 facilities
[1] &= 0x001c000000000000ULL
;
1007 static void __exit
kvm_s390_exit(void)
1009 free_page((unsigned long) facilities
);
1013 module_init(kvm_s390_init
);
1014 module_exit(kvm_s390_exit
);