Commit | Line | Data |
---|---|---|
b0c632db | 1 | /* |
a53c8fab | 2 | * hosting zSeries kernel virtual machines |
b0c632db | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 2008, 2009 |
b0c632db HC |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
15f36ebd | 14 | * Jason J. Herne <jjherne@us.ibm.com> |
b0c632db HC |
15 | */ |
16 | ||
17 | #include <linux/compiler.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/fs.h> | |
ca872302 | 20 | #include <linux/hrtimer.h> |
b0c632db HC |
21 | #include <linux/init.h> |
22 | #include <linux/kvm.h> | |
23 | #include <linux/kvm_host.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/slab.h> | |
ba5c1e9b | 26 | #include <linux/timer.h> |
cbb870c8 | 27 | #include <asm/asm-offsets.h> |
b0c632db HC |
28 | #include <asm/lowcore.h> |
29 | #include <asm/pgtable.h> | |
f5daba1d | 30 | #include <asm/nmi.h> |
a0616cde | 31 | #include <asm/switch_to.h> |
78c4b59f | 32 | #include <asm/facility.h> |
1526bf9c | 33 | #include <asm/sclp.h> |
8f2abe6a | 34 | #include "kvm-s390.h" |
b0c632db HC |
35 | #include "gaccess.h" |
36 | ||
5786fffa CH |
37 | #define CREATE_TRACE_POINTS |
38 | #include "trace.h" | |
ade38c31 | 39 | #include "trace-s390.h" |
5786fffa | 40 | |
b0c632db HC |
41 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
42 | ||
43 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
44 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 45 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
46 | { "exit_validity", VCPU_STAT(exit_validity) }, |
47 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
48 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
49 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
50 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
51 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
52 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
ce2e4f0b | 53 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 54 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 55 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
56 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
57 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 58 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 59 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
60 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
61 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
62 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
63 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
64 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
65 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
66 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 67 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
68 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
69 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
70 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
71 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
72 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 73 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
74 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
75 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 76 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
77 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
78 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 79 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 80 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 81 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 82 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
83 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
84 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
85 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
86 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
87 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 88 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 89 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 90 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
91 | { NULL } |
92 | }; | |
93 | ||
78c4b59f | 94 | unsigned long *vfacilities; |
2c70fe44 | 95 | static struct gmap_notifier gmap_notifier; |
b0c632db | 96 | |
78c4b59f | 97 | /* test availability of vfacility */ |
280ef0f1 | 98 | int test_vfacility(unsigned long nr) |
78c4b59f MM |
99 | { |
100 | return __test_facility(nr, (void *) vfacilities); | |
101 | } | |
102 | ||
b0c632db | 103 | /* Section: not file related */ |
13a34e06 | 104 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
105 | { |
106 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 107 | return 0; |
b0c632db HC |
108 | } |
109 | ||
2c70fe44 CB |
110 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
111 | ||
b0c632db HC |
112 | int kvm_arch_hardware_setup(void) |
113 | { | |
2c70fe44 CB |
114 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
115 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
116 | return 0; |
117 | } | |
118 | ||
119 | void kvm_arch_hardware_unsetup(void) | |
120 | { | |
2c70fe44 | 121 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
122 | } |
123 | ||
b0c632db HC |
124 | int kvm_arch_init(void *opaque) |
125 | { | |
84877d93 CH |
126 | /* Register floating interrupt controller interface. */ |
127 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
128 | } |
129 | ||
b0c632db HC |
130 | /* Section: device related */ |
131 | long kvm_arch_dev_ioctl(struct file *filp, | |
132 | unsigned int ioctl, unsigned long arg) | |
133 | { | |
134 | if (ioctl == KVM_S390_ENABLE_SIE) | |
135 | return s390_enable_sie(); | |
136 | return -EINVAL; | |
137 | } | |
138 | ||
784aa3d7 | 139 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 140 | { |
d7b0b5eb CO |
141 | int r; |
142 | ||
2bd0ac4e | 143 | switch (ext) { |
d7b0b5eb | 144 | case KVM_CAP_S390_PSW: |
b6cf8788 | 145 | case KVM_CAP_S390_GMAP: |
52e16b18 | 146 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
147 | #ifdef CONFIG_KVM_S390_UCONTROL |
148 | case KVM_CAP_S390_UCONTROL: | |
149 | #endif | |
3c038e6b | 150 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 151 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 152 | case KVM_CAP_ONE_REG: |
d6712df9 | 153 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 154 | case KVM_CAP_S390_CSS_SUPPORT: |
ebc32262 | 155 | case KVM_CAP_IRQFD: |
10ccaa1e | 156 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 157 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 158 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 159 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 160 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 161 | case KVM_CAP_MP_STATE: |
d7b0b5eb CO |
162 | r = 1; |
163 | break; | |
e726b1bd CB |
164 | case KVM_CAP_NR_VCPUS: |
165 | case KVM_CAP_MAX_VCPUS: | |
166 | r = KVM_MAX_VCPUS; | |
167 | break; | |
e1e2e605 NW |
168 | case KVM_CAP_NR_MEMSLOTS: |
169 | r = KVM_USER_MEM_SLOTS; | |
170 | break; | |
1526bf9c | 171 | case KVM_CAP_S390_COW: |
abf09bed | 172 | r = MACHINE_HAS_ESOP; |
1526bf9c | 173 | break; |
2bd0ac4e | 174 | default: |
d7b0b5eb | 175 | r = 0; |
2bd0ac4e | 176 | } |
d7b0b5eb | 177 | return r; |
b0c632db HC |
178 | } |
179 | ||
15f36ebd JH |
180 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
181 | struct kvm_memory_slot *memslot) | |
182 | { | |
183 | gfn_t cur_gfn, last_gfn; | |
184 | unsigned long address; | |
185 | struct gmap *gmap = kvm->arch.gmap; | |
186 | ||
187 | down_read(&gmap->mm->mmap_sem); | |
188 | /* Loop over all guest pages */ | |
189 | last_gfn = memslot->base_gfn + memslot->npages; | |
190 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
191 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
192 | ||
193 | if (gmap_test_and_clear_dirty(address, gmap)) | |
194 | mark_page_dirty(kvm, cur_gfn); | |
195 | } | |
196 | up_read(&gmap->mm->mmap_sem); | |
197 | } | |
198 | ||
b0c632db HC |
199 | /* Section: vm related */ |
200 | /* | |
201 | * Get (and clear) the dirty memory log for a memory slot. | |
202 | */ | |
203 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
204 | struct kvm_dirty_log *log) | |
205 | { | |
15f36ebd JH |
206 | int r; |
207 | unsigned long n; | |
208 | struct kvm_memory_slot *memslot; | |
209 | int is_dirty = 0; | |
210 | ||
211 | mutex_lock(&kvm->slots_lock); | |
212 | ||
213 | r = -EINVAL; | |
214 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
215 | goto out; | |
216 | ||
217 | memslot = id_to_memslot(kvm->memslots, log->slot); | |
218 | r = -ENOENT; | |
219 | if (!memslot->dirty_bitmap) | |
220 | goto out; | |
221 | ||
222 | kvm_s390_sync_dirty_log(kvm, memslot); | |
223 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
224 | if (r) | |
225 | goto out; | |
226 | ||
227 | /* Clear the dirty log */ | |
228 | if (is_dirty) { | |
229 | n = kvm_dirty_bitmap_bytes(memslot); | |
230 | memset(memslot->dirty_bitmap, 0, n); | |
231 | } | |
232 | r = 0; | |
233 | out: | |
234 | mutex_unlock(&kvm->slots_lock); | |
235 | return r; | |
b0c632db HC |
236 | } |
237 | ||
d938dc55 CH |
238 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
239 | { | |
240 | int r; | |
241 | ||
242 | if (cap->flags) | |
243 | return -EINVAL; | |
244 | ||
245 | switch (cap->cap) { | |
84223598 CH |
246 | case KVM_CAP_S390_IRQCHIP: |
247 | kvm->arch.use_irqchip = 1; | |
248 | r = 0; | |
249 | break; | |
d938dc55 CH |
250 | default: |
251 | r = -EINVAL; | |
252 | break; | |
253 | } | |
254 | return r; | |
255 | } | |
256 | ||
4f718eab DD |
257 | static int kvm_s390_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
258 | { | |
259 | int ret; | |
260 | unsigned int idx; | |
261 | switch (attr->attr) { | |
262 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
263 | ret = -EBUSY; | |
264 | mutex_lock(&kvm->lock); | |
265 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
266 | kvm->arch.use_cmma = 1; | |
267 | ret = 0; | |
268 | } | |
269 | mutex_unlock(&kvm->lock); | |
270 | break; | |
271 | case KVM_S390_VM_MEM_CLR_CMMA: | |
272 | mutex_lock(&kvm->lock); | |
273 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 274 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
275 | srcu_read_unlock(&kvm->srcu, idx); |
276 | mutex_unlock(&kvm->lock); | |
277 | ret = 0; | |
278 | break; | |
279 | default: | |
280 | ret = -ENXIO; | |
281 | break; | |
282 | } | |
283 | return ret; | |
284 | } | |
285 | ||
f2061656 DD |
286 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
287 | { | |
288 | int ret; | |
289 | ||
290 | switch (attr->group) { | |
4f718eab DD |
291 | case KVM_S390_VM_MEM_CTRL: |
292 | ret = kvm_s390_mem_control(kvm, attr); | |
293 | break; | |
f2061656 DD |
294 | default: |
295 | ret = -ENXIO; | |
296 | break; | |
297 | } | |
298 | ||
299 | return ret; | |
300 | } | |
301 | ||
302 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
303 | { | |
304 | return -ENXIO; | |
305 | } | |
306 | ||
307 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
308 | { | |
309 | int ret; | |
310 | ||
311 | switch (attr->group) { | |
4f718eab DD |
312 | case KVM_S390_VM_MEM_CTRL: |
313 | switch (attr->attr) { | |
314 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
315 | case KVM_S390_VM_MEM_CLR_CMMA: | |
316 | ret = 0; | |
317 | break; | |
318 | default: | |
319 | ret = -ENXIO; | |
320 | break; | |
321 | } | |
322 | break; | |
f2061656 DD |
323 | default: |
324 | ret = -ENXIO; | |
325 | break; | |
326 | } | |
327 | ||
328 | return ret; | |
329 | } | |
330 | ||
b0c632db HC |
331 | long kvm_arch_vm_ioctl(struct file *filp, |
332 | unsigned int ioctl, unsigned long arg) | |
333 | { | |
334 | struct kvm *kvm = filp->private_data; | |
335 | void __user *argp = (void __user *)arg; | |
f2061656 | 336 | struct kvm_device_attr attr; |
b0c632db HC |
337 | int r; |
338 | ||
339 | switch (ioctl) { | |
ba5c1e9b CO |
340 | case KVM_S390_INTERRUPT: { |
341 | struct kvm_s390_interrupt s390int; | |
342 | ||
343 | r = -EFAULT; | |
344 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
345 | break; | |
346 | r = kvm_s390_inject_vm(kvm, &s390int); | |
347 | break; | |
348 | } | |
d938dc55 CH |
349 | case KVM_ENABLE_CAP: { |
350 | struct kvm_enable_cap cap; | |
351 | r = -EFAULT; | |
352 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
353 | break; | |
354 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
355 | break; | |
356 | } | |
84223598 CH |
357 | case KVM_CREATE_IRQCHIP: { |
358 | struct kvm_irq_routing_entry routing; | |
359 | ||
360 | r = -EINVAL; | |
361 | if (kvm->arch.use_irqchip) { | |
362 | /* Set up dummy routing. */ | |
363 | memset(&routing, 0, sizeof(routing)); | |
364 | kvm_set_irq_routing(kvm, &routing, 0, 0); | |
365 | r = 0; | |
366 | } | |
367 | break; | |
368 | } | |
f2061656 DD |
369 | case KVM_SET_DEVICE_ATTR: { |
370 | r = -EFAULT; | |
371 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
372 | break; | |
373 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
374 | break; | |
375 | } | |
376 | case KVM_GET_DEVICE_ATTR: { | |
377 | r = -EFAULT; | |
378 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
379 | break; | |
380 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
381 | break; | |
382 | } | |
383 | case KVM_HAS_DEVICE_ATTR: { | |
384 | r = -EFAULT; | |
385 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
386 | break; | |
387 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
388 | break; | |
389 | } | |
b0c632db | 390 | default: |
367e1319 | 391 | r = -ENOTTY; |
b0c632db HC |
392 | } |
393 | ||
394 | return r; | |
395 | } | |
396 | ||
5102ee87 TK |
397 | static int kvm_s390_crypto_init(struct kvm *kvm) |
398 | { | |
399 | if (!test_vfacility(76)) | |
400 | return 0; | |
401 | ||
402 | kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb), | |
403 | GFP_KERNEL | GFP_DMA); | |
404 | if (!kvm->arch.crypto.crycb) | |
405 | return -ENOMEM; | |
406 | ||
407 | kvm->arch.crypto.crycbd = (__u32) (unsigned long) kvm->arch.crypto.crycb | | |
408 | CRYCB_FORMAT1; | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
e08b9637 | 413 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 414 | { |
b0c632db HC |
415 | int rc; |
416 | char debug_name[16]; | |
f6c137ff | 417 | static unsigned long sca_offset; |
b0c632db | 418 | |
e08b9637 CO |
419 | rc = -EINVAL; |
420 | #ifdef CONFIG_KVM_S390_UCONTROL | |
421 | if (type & ~KVM_VM_S390_UCONTROL) | |
422 | goto out_err; | |
423 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
424 | goto out_err; | |
425 | #else | |
426 | if (type) | |
427 | goto out_err; | |
428 | #endif | |
429 | ||
b0c632db HC |
430 | rc = s390_enable_sie(); |
431 | if (rc) | |
d89f5eff | 432 | goto out_err; |
b0c632db | 433 | |
b290411a CO |
434 | rc = -ENOMEM; |
435 | ||
b0c632db HC |
436 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
437 | if (!kvm->arch.sca) | |
d89f5eff | 438 | goto out_err; |
f6c137ff CB |
439 | spin_lock(&kvm_lock); |
440 | sca_offset = (sca_offset + 16) & 0x7f0; | |
441 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); | |
442 | spin_unlock(&kvm_lock); | |
b0c632db HC |
443 | |
444 | sprintf(debug_name, "kvm-%u", current->pid); | |
445 | ||
446 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
447 | if (!kvm->arch.dbf) | |
448 | goto out_nodbf; | |
449 | ||
5102ee87 TK |
450 | if (kvm_s390_crypto_init(kvm) < 0) |
451 | goto out_crypto; | |
452 | ||
ba5c1e9b CO |
453 | spin_lock_init(&kvm->arch.float_int.lock); |
454 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
8a242234 | 455 | init_waitqueue_head(&kvm->arch.ipte_wq); |
ba5c1e9b | 456 | |
b0c632db HC |
457 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
458 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
459 | ||
e08b9637 CO |
460 | if (type & KVM_VM_S390_UCONTROL) { |
461 | kvm->arch.gmap = NULL; | |
462 | } else { | |
0349985a | 463 | kvm->arch.gmap = gmap_alloc(current->mm, (1UL << 44) - 1); |
e08b9637 CO |
464 | if (!kvm->arch.gmap) |
465 | goto out_nogmap; | |
2c70fe44 | 466 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 467 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 468 | } |
fa6b7fe9 CH |
469 | |
470 | kvm->arch.css_support = 0; | |
84223598 | 471 | kvm->arch.use_irqchip = 0; |
fa6b7fe9 | 472 | |
8ad35755 DH |
473 | spin_lock_init(&kvm->arch.start_stop_lock); |
474 | ||
d89f5eff | 475 | return 0; |
598841ca | 476 | out_nogmap: |
5102ee87 TK |
477 | kfree(kvm->arch.crypto.crycb); |
478 | out_crypto: | |
598841ca | 479 | debug_unregister(kvm->arch.dbf); |
b0c632db HC |
480 | out_nodbf: |
481 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
482 | out_err: |
483 | return rc; | |
b0c632db HC |
484 | } |
485 | ||
d329c035 CB |
486 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
487 | { | |
488 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 489 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 490 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 491 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
492 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
493 | clear_bit(63 - vcpu->vcpu_id, | |
494 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
495 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
496 | (__u64) vcpu->arch.sie_block) | |
497 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
498 | } | |
abf4a71e | 499 | smp_mb(); |
27e0393f CO |
500 | |
501 | if (kvm_is_ucontrol(vcpu->kvm)) | |
502 | gmap_free(vcpu->arch.gmap); | |
503 | ||
b31605c1 DD |
504 | if (kvm_s390_cmma_enabled(vcpu->kvm)) |
505 | kvm_s390_vcpu_unsetup_cmma(vcpu); | |
d329c035 | 506 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 507 | |
6692cef3 | 508 | kvm_vcpu_uninit(vcpu); |
b110feaf | 509 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
510 | } |
511 | ||
512 | static void kvm_free_vcpus(struct kvm *kvm) | |
513 | { | |
514 | unsigned int i; | |
988a2cae | 515 | struct kvm_vcpu *vcpu; |
d329c035 | 516 | |
988a2cae GN |
517 | kvm_for_each_vcpu(i, vcpu, kvm) |
518 | kvm_arch_vcpu_destroy(vcpu); | |
519 | ||
520 | mutex_lock(&kvm->lock); | |
521 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
522 | kvm->vcpus[i] = NULL; | |
523 | ||
524 | atomic_set(&kvm->online_vcpus, 0); | |
525 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
526 | } |
527 | ||
b0c632db HC |
528 | void kvm_arch_destroy_vm(struct kvm *kvm) |
529 | { | |
d329c035 | 530 | kvm_free_vcpus(kvm); |
b0c632db | 531 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 532 | debug_unregister(kvm->arch.dbf); |
5102ee87 | 533 | kfree(kvm->arch.crypto.crycb); |
27e0393f CO |
534 | if (!kvm_is_ucontrol(kvm)) |
535 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 536 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 537 | kvm_s390_clear_float_irqs(kvm); |
b0c632db HC |
538 | } |
539 | ||
540 | /* Section: vcpu related */ | |
541 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
542 | { | |
3c038e6b DD |
543 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
544 | kvm_clear_async_pf_completion_queue(vcpu); | |
27e0393f | 545 | if (kvm_is_ucontrol(vcpu->kvm)) { |
c6c956b8 | 546 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); |
27e0393f CO |
547 | if (!vcpu->arch.gmap) |
548 | return -ENOMEM; | |
2c70fe44 | 549 | vcpu->arch.gmap->private = vcpu->kvm; |
27e0393f CO |
550 | return 0; |
551 | } | |
552 | ||
598841ca | 553 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
554 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
555 | KVM_SYNC_GPRS | | |
9eed0735 | 556 | KVM_SYNC_ACRS | |
b028ee3e DH |
557 | KVM_SYNC_CRS | |
558 | KVM_SYNC_ARCH0 | | |
559 | KVM_SYNC_PFAULT; | |
b0c632db HC |
560 | return 0; |
561 | } | |
562 | ||
b0c632db HC |
563 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
564 | { | |
4725c860 MS |
565 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
566 | save_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db | 567 | save_access_regs(vcpu->arch.host_acrs); |
4725c860 MS |
568 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
569 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 570 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 571 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 572 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
573 | } |
574 | ||
575 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
576 | { | |
9e6dabef | 577 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 578 | gmap_disable(vcpu->arch.gmap); |
4725c860 MS |
579 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
580 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 581 | save_access_regs(vcpu->run->s.regs.acrs); |
4725c860 MS |
582 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
583 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db HC |
584 | restore_access_regs(vcpu->arch.host_acrs); |
585 | } | |
586 | ||
587 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
588 | { | |
589 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
590 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
591 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 592 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
593 | vcpu->arch.sie_block->cputm = 0UL; |
594 | vcpu->arch.sie_block->ckc = 0UL; | |
595 | vcpu->arch.sie_block->todpr = 0; | |
596 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
597 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
598 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
599 | vcpu->arch.guest_fpregs.fpc = 0; | |
600 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
601 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 602 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
603 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
604 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
605 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
606 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 607 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
608 | } |
609 | ||
42897d86 MT |
610 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
611 | { | |
612 | return 0; | |
613 | } | |
614 | ||
5102ee87 TK |
615 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
616 | { | |
617 | if (!test_vfacility(76)) | |
618 | return; | |
619 | ||
620 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; | |
621 | } | |
622 | ||
b31605c1 DD |
623 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
624 | { | |
625 | free_page(vcpu->arch.sie_block->cbrlo); | |
626 | vcpu->arch.sie_block->cbrlo = 0; | |
627 | } | |
628 | ||
629 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
630 | { | |
631 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
632 | if (!vcpu->arch.sie_block->cbrlo) | |
633 | return -ENOMEM; | |
634 | ||
635 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
636 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
637 | return 0; | |
638 | } | |
639 | ||
b0c632db HC |
640 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
641 | { | |
b31605c1 | 642 | int rc = 0; |
b31288fa | 643 | |
9e6dabef CH |
644 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
645 | CPUSTAT_SM | | |
69d0d3a3 CB |
646 | CPUSTAT_STOPPED | |
647 | CPUSTAT_GED); | |
fc34531d | 648 | vcpu->arch.sie_block->ecb = 6; |
7feb6bb8 MM |
649 | if (test_vfacility(50) && test_vfacility(73)) |
650 | vcpu->arch.sie_block->ecb |= 0x10; | |
651 | ||
69d0d3a3 | 652 | vcpu->arch.sie_block->ecb2 = 8; |
4953919f | 653 | vcpu->arch.sie_block->eca = 0xD1002000U; |
217a4406 HC |
654 | if (sclp_has_siif()) |
655 | vcpu->arch.sie_block->eca |= 1; | |
78c4b59f | 656 | vcpu->arch.sie_block->fac = (int) (long) vfacilities; |
5a5e6536 MR |
657 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE | |
658 | ICTL_TPROT; | |
659 | ||
b31605c1 DD |
660 | if (kvm_s390_cmma_enabled(vcpu->kvm)) { |
661 | rc = kvm_s390_vcpu_setup_cmma(vcpu); | |
662 | if (rc) | |
663 | return rc; | |
b31288fa | 664 | } |
ca872302 | 665 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
ca872302 | 666 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
453423dc | 667 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 668 | vcpu->arch.cpu_id.version = 0xff; |
5102ee87 TK |
669 | |
670 | kvm_s390_vcpu_crypto_setup(vcpu); | |
671 | ||
b31605c1 | 672 | return rc; |
b0c632db HC |
673 | } |
674 | ||
675 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
676 | unsigned int id) | |
677 | { | |
4d47555a | 678 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 679 | struct sie_page *sie_page; |
4d47555a CO |
680 | int rc = -EINVAL; |
681 | ||
682 | if (id >= KVM_MAX_VCPUS) | |
683 | goto out; | |
684 | ||
685 | rc = -ENOMEM; | |
b0c632db | 686 | |
b110feaf | 687 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 688 | if (!vcpu) |
4d47555a | 689 | goto out; |
b0c632db | 690 | |
7feb6bb8 MM |
691 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
692 | if (!sie_page) | |
b0c632db HC |
693 | goto out_free_cpu; |
694 | ||
7feb6bb8 MM |
695 | vcpu->arch.sie_block = &sie_page->sie_block; |
696 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
697 | ||
b0c632db | 698 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
699 | if (!kvm_is_ucontrol(kvm)) { |
700 | if (!kvm->arch.sca) { | |
701 | WARN_ON_ONCE(1); | |
702 | goto out_free_cpu; | |
703 | } | |
704 | if (!kvm->arch.sca->cpu[id].sda) | |
705 | kvm->arch.sca->cpu[id].sda = | |
706 | (__u64) vcpu->arch.sie_block; | |
707 | vcpu->arch.sie_block->scaoh = | |
708 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
709 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
710 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
711 | } | |
b0c632db | 712 | |
ba5c1e9b CO |
713 | spin_lock_init(&vcpu->arch.local_int.lock); |
714 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
715 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
d0321a24 | 716 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 717 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 718 | |
b0c632db HC |
719 | rc = kvm_vcpu_init(vcpu, kvm, id); |
720 | if (rc) | |
7b06bf2f | 721 | goto out_free_sie_block; |
b0c632db HC |
722 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
723 | vcpu->arch.sie_block); | |
ade38c31 | 724 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 725 | |
b0c632db | 726 | return vcpu; |
7b06bf2f WY |
727 | out_free_sie_block: |
728 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 729 | out_free_cpu: |
b110feaf | 730 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 731 | out: |
b0c632db HC |
732 | return ERR_PTR(rc); |
733 | } | |
734 | ||
b0c632db HC |
735 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
736 | { | |
f87618e8 | 737 | return kvm_cpu_has_interrupt(vcpu); |
b0c632db HC |
738 | } |
739 | ||
49b99e1e CB |
740 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
741 | { | |
742 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
743 | } | |
744 | ||
745 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
746 | { | |
747 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
748 | } | |
749 | ||
750 | /* | |
751 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
752 | * If the CPU is not running (e.g. waiting as idle) the function will | |
753 | * return immediately. */ | |
754 | void exit_sie(struct kvm_vcpu *vcpu) | |
755 | { | |
756 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
757 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
758 | cpu_relax(); | |
759 | } | |
760 | ||
761 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
762 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
763 | { | |
764 | s390_vcpu_block(vcpu); | |
765 | exit_sie(vcpu); | |
766 | } | |
767 | ||
2c70fe44 CB |
768 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
769 | { | |
770 | int i; | |
771 | struct kvm *kvm = gmap->private; | |
772 | struct kvm_vcpu *vcpu; | |
773 | ||
774 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
775 | /* match against both prefix pages */ | |
fda902cb | 776 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 CB |
777 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
778 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
779 | exit_sie_sync(vcpu); | |
780 | } | |
781 | } | |
782 | } | |
783 | ||
b6d33834 CD |
784 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
785 | { | |
786 | /* kvm common code refers to this, but never calls it */ | |
787 | BUG(); | |
788 | return 0; | |
789 | } | |
790 | ||
14eebd91 CO |
791 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
792 | struct kvm_one_reg *reg) | |
793 | { | |
794 | int r = -EINVAL; | |
795 | ||
796 | switch (reg->id) { | |
29b7c71b CO |
797 | case KVM_REG_S390_TODPR: |
798 | r = put_user(vcpu->arch.sie_block->todpr, | |
799 | (u32 __user *)reg->addr); | |
800 | break; | |
801 | case KVM_REG_S390_EPOCHDIFF: | |
802 | r = put_user(vcpu->arch.sie_block->epoch, | |
803 | (u64 __user *)reg->addr); | |
804 | break; | |
46a6dd1c J |
805 | case KVM_REG_S390_CPU_TIMER: |
806 | r = put_user(vcpu->arch.sie_block->cputm, | |
807 | (u64 __user *)reg->addr); | |
808 | break; | |
809 | case KVM_REG_S390_CLOCK_COMP: | |
810 | r = put_user(vcpu->arch.sie_block->ckc, | |
811 | (u64 __user *)reg->addr); | |
812 | break; | |
536336c2 DD |
813 | case KVM_REG_S390_PFTOKEN: |
814 | r = put_user(vcpu->arch.pfault_token, | |
815 | (u64 __user *)reg->addr); | |
816 | break; | |
817 | case KVM_REG_S390_PFCOMPARE: | |
818 | r = put_user(vcpu->arch.pfault_compare, | |
819 | (u64 __user *)reg->addr); | |
820 | break; | |
821 | case KVM_REG_S390_PFSELECT: | |
822 | r = put_user(vcpu->arch.pfault_select, | |
823 | (u64 __user *)reg->addr); | |
824 | break; | |
672550fb CB |
825 | case KVM_REG_S390_PP: |
826 | r = put_user(vcpu->arch.sie_block->pp, | |
827 | (u64 __user *)reg->addr); | |
828 | break; | |
afa45ff5 CB |
829 | case KVM_REG_S390_GBEA: |
830 | r = put_user(vcpu->arch.sie_block->gbea, | |
831 | (u64 __user *)reg->addr); | |
832 | break; | |
14eebd91 CO |
833 | default: |
834 | break; | |
835 | } | |
836 | ||
837 | return r; | |
838 | } | |
839 | ||
840 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
841 | struct kvm_one_reg *reg) | |
842 | { | |
843 | int r = -EINVAL; | |
844 | ||
845 | switch (reg->id) { | |
29b7c71b CO |
846 | case KVM_REG_S390_TODPR: |
847 | r = get_user(vcpu->arch.sie_block->todpr, | |
848 | (u32 __user *)reg->addr); | |
849 | break; | |
850 | case KVM_REG_S390_EPOCHDIFF: | |
851 | r = get_user(vcpu->arch.sie_block->epoch, | |
852 | (u64 __user *)reg->addr); | |
853 | break; | |
46a6dd1c J |
854 | case KVM_REG_S390_CPU_TIMER: |
855 | r = get_user(vcpu->arch.sie_block->cputm, | |
856 | (u64 __user *)reg->addr); | |
857 | break; | |
858 | case KVM_REG_S390_CLOCK_COMP: | |
859 | r = get_user(vcpu->arch.sie_block->ckc, | |
860 | (u64 __user *)reg->addr); | |
861 | break; | |
536336c2 DD |
862 | case KVM_REG_S390_PFTOKEN: |
863 | r = get_user(vcpu->arch.pfault_token, | |
864 | (u64 __user *)reg->addr); | |
865 | break; | |
866 | case KVM_REG_S390_PFCOMPARE: | |
867 | r = get_user(vcpu->arch.pfault_compare, | |
868 | (u64 __user *)reg->addr); | |
869 | break; | |
870 | case KVM_REG_S390_PFSELECT: | |
871 | r = get_user(vcpu->arch.pfault_select, | |
872 | (u64 __user *)reg->addr); | |
873 | break; | |
672550fb CB |
874 | case KVM_REG_S390_PP: |
875 | r = get_user(vcpu->arch.sie_block->pp, | |
876 | (u64 __user *)reg->addr); | |
877 | break; | |
afa45ff5 CB |
878 | case KVM_REG_S390_GBEA: |
879 | r = get_user(vcpu->arch.sie_block->gbea, | |
880 | (u64 __user *)reg->addr); | |
881 | break; | |
14eebd91 CO |
882 | default: |
883 | break; | |
884 | } | |
885 | ||
886 | return r; | |
887 | } | |
b6d33834 | 888 | |
b0c632db HC |
889 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
890 | { | |
b0c632db | 891 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
892 | return 0; |
893 | } | |
894 | ||
895 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
896 | { | |
5a32c1af | 897 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
898 | return 0; |
899 | } | |
900 | ||
901 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
902 | { | |
5a32c1af | 903 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
904 | return 0; |
905 | } | |
906 | ||
907 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
908 | struct kvm_sregs *sregs) | |
909 | { | |
59674c1a | 910 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 911 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 912 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
913 | return 0; |
914 | } | |
915 | ||
916 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
917 | struct kvm_sregs *sregs) | |
918 | { | |
59674c1a | 919 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 920 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
921 | return 0; |
922 | } | |
923 | ||
924 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
925 | { | |
4725c860 MS |
926 | if (test_fp_ctl(fpu->fpc)) |
927 | return -EINVAL; | |
b0c632db | 928 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 MS |
929 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
930 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
931 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
b0c632db HC |
932 | return 0; |
933 | } | |
934 | ||
935 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
936 | { | |
b0c632db HC |
937 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
938 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
939 | return 0; |
940 | } | |
941 | ||
942 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
943 | { | |
944 | int rc = 0; | |
945 | ||
7a42fdc2 | 946 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 947 | rc = -EBUSY; |
d7b0b5eb CO |
948 | else { |
949 | vcpu->run->psw_mask = psw.mask; | |
950 | vcpu->run->psw_addr = psw.addr; | |
951 | } | |
b0c632db HC |
952 | return rc; |
953 | } | |
954 | ||
955 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
956 | struct kvm_translation *tr) | |
957 | { | |
958 | return -EINVAL; /* not implemented yet */ | |
959 | } | |
960 | ||
27291e21 DH |
961 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
962 | KVM_GUESTDBG_USE_HW_BP | \ | |
963 | KVM_GUESTDBG_ENABLE) | |
964 | ||
d0bfb940 JK |
965 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
966 | struct kvm_guest_debug *dbg) | |
b0c632db | 967 | { |
27291e21 DH |
968 | int rc = 0; |
969 | ||
970 | vcpu->guest_debug = 0; | |
971 | kvm_s390_clear_bp_data(vcpu); | |
972 | ||
2de3bfc2 | 973 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
974 | return -EINVAL; |
975 | ||
976 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
977 | vcpu->guest_debug = dbg->control; | |
978 | /* enforce guest PER */ | |
979 | atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
980 | ||
981 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
982 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
983 | } else { | |
984 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
985 | vcpu->arch.guestdbg.last_bp = 0; | |
986 | } | |
987 | ||
988 | if (rc) { | |
989 | vcpu->guest_debug = 0; | |
990 | kvm_s390_clear_bp_data(vcpu); | |
991 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
992 | } | |
993 | ||
994 | return rc; | |
b0c632db HC |
995 | } |
996 | ||
62d9f0db MT |
997 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
998 | struct kvm_mp_state *mp_state) | |
999 | { | |
6352e4d2 DH |
1000 | /* CHECK_STOP and LOAD are not supported yet */ |
1001 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
1002 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
1003 | } |
1004 | ||
1005 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
1006 | struct kvm_mp_state *mp_state) | |
1007 | { | |
6352e4d2 DH |
1008 | int rc = 0; |
1009 | ||
1010 | /* user space knows about this interface - let it control the state */ | |
1011 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
1012 | ||
1013 | switch (mp_state->mp_state) { | |
1014 | case KVM_MP_STATE_STOPPED: | |
1015 | kvm_s390_vcpu_stop(vcpu); | |
1016 | break; | |
1017 | case KVM_MP_STATE_OPERATING: | |
1018 | kvm_s390_vcpu_start(vcpu); | |
1019 | break; | |
1020 | case KVM_MP_STATE_LOAD: | |
1021 | case KVM_MP_STATE_CHECK_STOP: | |
1022 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
1023 | default: | |
1024 | rc = -ENXIO; | |
1025 | } | |
1026 | ||
1027 | return rc; | |
62d9f0db MT |
1028 | } |
1029 | ||
b31605c1 DD |
1030 | bool kvm_s390_cmma_enabled(struct kvm *kvm) |
1031 | { | |
1032 | if (!MACHINE_IS_LPAR) | |
1033 | return false; | |
1034 | /* only enable for z10 and later */ | |
1035 | if (!MACHINE_HAS_EDAT1) | |
1036 | return false; | |
1037 | if (!kvm->arch.use_cmma) | |
1038 | return false; | |
1039 | return true; | |
1040 | } | |
1041 | ||
8ad35755 DH |
1042 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
1043 | { | |
1044 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
1045 | } | |
1046 | ||
2c70fe44 CB |
1047 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
1048 | { | |
8ad35755 DH |
1049 | retry: |
1050 | s390_vcpu_unblock(vcpu); | |
2c70fe44 CB |
1051 | /* |
1052 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
1053 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
1054 | * This ensures that the ipte instruction for this request has | |
1055 | * already finished. We might race against a second unmapper that | |
1056 | * wants to set the blocking bit. Lets just retry the request loop. | |
1057 | */ | |
8ad35755 | 1058 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
1059 | int rc; |
1060 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 1061 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
1062 | PAGE_SIZE * 2); |
1063 | if (rc) | |
1064 | return rc; | |
8ad35755 | 1065 | goto retry; |
2c70fe44 | 1066 | } |
8ad35755 | 1067 | |
d3d692c8 DH |
1068 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
1069 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
1070 | goto retry; | |
1071 | } | |
1072 | ||
8ad35755 DH |
1073 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
1074 | if (!ibs_enabled(vcpu)) { | |
1075 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
1076 | atomic_set_mask(CPUSTAT_IBS, | |
1077 | &vcpu->arch.sie_block->cpuflags); | |
1078 | } | |
1079 | goto retry; | |
2c70fe44 | 1080 | } |
8ad35755 DH |
1081 | |
1082 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
1083 | if (ibs_enabled(vcpu)) { | |
1084 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
1085 | atomic_clear_mask(CPUSTAT_IBS, | |
1086 | &vcpu->arch.sie_block->cpuflags); | |
1087 | } | |
1088 | goto retry; | |
1089 | } | |
1090 | ||
0759d068 DH |
1091 | /* nothing to do, just clear the request */ |
1092 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
1093 | ||
2c70fe44 CB |
1094 | return 0; |
1095 | } | |
1096 | ||
fa576c58 TH |
1097 | /** |
1098 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
1099 | * @vcpu: The corresponding virtual cpu | |
1100 | * @gpa: Guest physical address | |
1101 | * @writable: Whether the page should be writable or not | |
1102 | * | |
1103 | * Make sure that a guest page has been faulted-in on the host. | |
1104 | * | |
1105 | * Return: Zero on success, negative error code otherwise. | |
1106 | */ | |
1107 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 1108 | { |
527e30b4 MS |
1109 | return gmap_fault(vcpu->arch.gmap, gpa, |
1110 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
1111 | } |
1112 | ||
3c038e6b DD |
1113 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
1114 | unsigned long token) | |
1115 | { | |
1116 | struct kvm_s390_interrupt inti; | |
1117 | inti.parm64 = token; | |
1118 | ||
1119 | if (start_token) { | |
1120 | inti.type = KVM_S390_INT_PFAULT_INIT; | |
1121 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &inti)); | |
1122 | } else { | |
1123 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
1124 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
1129 | struct kvm_async_pf *work) | |
1130 | { | |
1131 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
1132 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
1133 | } | |
1134 | ||
1135 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
1136 | struct kvm_async_pf *work) | |
1137 | { | |
1138 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
1139 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
1140 | } | |
1141 | ||
1142 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
1143 | struct kvm_async_pf *work) | |
1144 | { | |
1145 | /* s390 will always inject the page directly */ | |
1146 | } | |
1147 | ||
1148 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
1149 | { | |
1150 | /* | |
1151 | * s390 will always inject the page directly, | |
1152 | * but we still want check_async_completion to cleanup | |
1153 | */ | |
1154 | return true; | |
1155 | } | |
1156 | ||
1157 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
1158 | { | |
1159 | hva_t hva; | |
1160 | struct kvm_arch_async_pf arch; | |
1161 | int rc; | |
1162 | ||
1163 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
1164 | return 0; | |
1165 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
1166 | vcpu->arch.pfault_compare) | |
1167 | return 0; | |
1168 | if (psw_extint_disabled(vcpu)) | |
1169 | return 0; | |
1170 | if (kvm_cpu_has_interrupt(vcpu)) | |
1171 | return 0; | |
1172 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
1173 | return 0; | |
1174 | if (!vcpu->arch.gmap->pfault_enabled) | |
1175 | return 0; | |
1176 | ||
81480cc1 HC |
1177 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
1178 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
1179 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
1180 | return 0; |
1181 | ||
1182 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
1183 | return rc; | |
1184 | } | |
1185 | ||
3fb4c40f | 1186 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 1187 | { |
3fb4c40f | 1188 | int rc, cpuflags; |
e168bf8d | 1189 | |
3c038e6b DD |
1190 | /* |
1191 | * On s390 notifications for arriving pages will be delivered directly | |
1192 | * to the guest but the house keeping for completed pfaults is | |
1193 | * handled outside the worker. | |
1194 | */ | |
1195 | kvm_check_async_pf_completion(vcpu); | |
1196 | ||
5a32c1af | 1197 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
1198 | |
1199 | if (need_resched()) | |
1200 | schedule(); | |
1201 | ||
d3a73acb | 1202 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
1203 | s390_handle_mcck(); |
1204 | ||
79395031 JF |
1205 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
1206 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
1207 | if (rc) | |
1208 | return rc; | |
1209 | } | |
0ff31867 | 1210 | |
2c70fe44 CB |
1211 | rc = kvm_s390_handle_requests(vcpu); |
1212 | if (rc) | |
1213 | return rc; | |
1214 | ||
27291e21 DH |
1215 | if (guestdbg_enabled(vcpu)) { |
1216 | kvm_s390_backup_guest_per_regs(vcpu); | |
1217 | kvm_s390_patch_guest_per_regs(vcpu); | |
1218 | } | |
1219 | ||
b0c632db | 1220 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
1221 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
1222 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
1223 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 1224 | |
3fb4c40f TH |
1225 | return 0; |
1226 | } | |
1227 | ||
1228 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) | |
1229 | { | |
24eb3a82 | 1230 | int rc = -1; |
2b29a9fd DD |
1231 | |
1232 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
1233 | vcpu->arch.sie_block->icptcode); | |
1234 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
1235 | ||
27291e21 DH |
1236 | if (guestdbg_enabled(vcpu)) |
1237 | kvm_s390_restore_guest_per_regs(vcpu); | |
1238 | ||
3fb4c40f | 1239 | if (exit_reason >= 0) { |
7c470539 | 1240 | rc = 0; |
210b1607 TH |
1241 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
1242 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
1243 | vcpu->run->s390_ucontrol.trans_exc_code = | |
1244 | current->thread.gmap_addr; | |
1245 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
1246 | rc = -EREMOTE; | |
24eb3a82 DD |
1247 | |
1248 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 1249 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 1250 | current->thread.gmap_pfault = 0; |
fa576c58 | 1251 | if (kvm_arch_setup_async_pf(vcpu)) { |
24eb3a82 | 1252 | rc = 0; |
fa576c58 TH |
1253 | } else { |
1254 | gpa_t gpa = current->thread.gmap_addr; | |
1255 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); | |
1256 | } | |
24eb3a82 DD |
1257 | } |
1258 | ||
1259 | if (rc == -1) { | |
699bde3b CB |
1260 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
1261 | trace_kvm_s390_sie_fault(vcpu); | |
1262 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
1f0d0f09 | 1263 | } |
b0c632db | 1264 | |
5a32c1af | 1265 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 1266 | |
a76ccff6 TH |
1267 | if (rc == 0) { |
1268 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
1269 | /* Don't exit for host interrupts. */ |
1270 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
1271 | else |
1272 | rc = kvm_handle_sie_intercept(vcpu); | |
1273 | } | |
1274 | ||
3fb4c40f TH |
1275 | return rc; |
1276 | } | |
1277 | ||
1278 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
1279 | { | |
1280 | int rc, exit_reason; | |
1281 | ||
800c1065 TH |
1282 | /* |
1283 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
1284 | * ning the guest), so that memslots (and other stuff) are protected | |
1285 | */ | |
1286 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
1287 | ||
a76ccff6 TH |
1288 | do { |
1289 | rc = vcpu_pre_run(vcpu); | |
1290 | if (rc) | |
1291 | break; | |
3fb4c40f | 1292 | |
800c1065 | 1293 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
1294 | /* |
1295 | * As PF_VCPU will be used in fault handler, between | |
1296 | * guest_enter and guest_exit should be no uaccess. | |
1297 | */ | |
1298 | preempt_disable(); | |
1299 | kvm_guest_enter(); | |
1300 | preempt_enable(); | |
1301 | exit_reason = sie64a(vcpu->arch.sie_block, | |
1302 | vcpu->run->s.regs.gprs); | |
1303 | kvm_guest_exit(); | |
800c1065 | 1304 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
1305 | |
1306 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 1307 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 1308 | |
800c1065 | 1309 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 1310 | return rc; |
b0c632db HC |
1311 | } |
1312 | ||
b028ee3e DH |
1313 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
1314 | { | |
1315 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
1316 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
1317 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
1318 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
1319 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
1320 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
1321 | /* some control register changes require a tlb flush */ |
1322 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
1323 | } |
1324 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
1325 | vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; | |
1326 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; | |
1327 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
1328 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
1329 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
1330 | } | |
1331 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
1332 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
1333 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
1334 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
1335 | } | |
1336 | kvm_run->kvm_dirty_regs = 0; | |
1337 | } | |
1338 | ||
1339 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
1340 | { | |
1341 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
1342 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
1343 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
1344 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
1345 | kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm; | |
1346 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; | |
1347 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
1348 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
1349 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
1350 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
1351 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
1352 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
1353 | } | |
1354 | ||
b0c632db HC |
1355 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
1356 | { | |
8f2abe6a | 1357 | int rc; |
b0c632db HC |
1358 | sigset_t sigsaved; |
1359 | ||
27291e21 DH |
1360 | if (guestdbg_exit_pending(vcpu)) { |
1361 | kvm_s390_prepare_debug_exit(vcpu); | |
1362 | return 0; | |
1363 | } | |
1364 | ||
b0c632db HC |
1365 | if (vcpu->sigset_active) |
1366 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1367 | ||
6352e4d2 DH |
1368 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
1369 | kvm_s390_vcpu_start(vcpu); | |
1370 | } else if (is_vcpu_stopped(vcpu)) { | |
1371 | pr_err_ratelimited("kvm-s390: can't run stopped vcpu %d\n", | |
1372 | vcpu->vcpu_id); | |
1373 | return -EINVAL; | |
1374 | } | |
b0c632db | 1375 | |
b028ee3e | 1376 | sync_regs(vcpu, kvm_run); |
d7b0b5eb | 1377 | |
dab4079d | 1378 | might_fault(); |
a76ccff6 | 1379 | rc = __vcpu_run(vcpu); |
9ace903d | 1380 | |
b1d16c49 CE |
1381 | if (signal_pending(current) && !rc) { |
1382 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 1383 | rc = -EINTR; |
b1d16c49 | 1384 | } |
8f2abe6a | 1385 | |
27291e21 DH |
1386 | if (guestdbg_exit_pending(vcpu) && !rc) { |
1387 | kvm_s390_prepare_debug_exit(vcpu); | |
1388 | rc = 0; | |
1389 | } | |
1390 | ||
b8e660b8 | 1391 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
1392 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
1393 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
1394 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
1395 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
1396 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
1397 | rc = 0; | |
1398 | } | |
1399 | ||
1400 | if (rc == -EREMOTE) { | |
1401 | /* intercept was handled, but userspace support is needed | |
1402 | * kvm_run has been prepared by the handler */ | |
1403 | rc = 0; | |
1404 | } | |
b0c632db | 1405 | |
b028ee3e | 1406 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 1407 | |
b0c632db HC |
1408 | if (vcpu->sigset_active) |
1409 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1410 | ||
b0c632db | 1411 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 1412 | return rc; |
b0c632db HC |
1413 | } |
1414 | ||
b0c632db HC |
1415 | /* |
1416 | * store status at address | |
1417 | * we use have two special cases: | |
1418 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
1419 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
1420 | */ | |
d0bce605 | 1421 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 1422 | { |
092670cd | 1423 | unsigned char archmode = 1; |
fda902cb | 1424 | unsigned int px; |
178bd789 | 1425 | u64 clkcomp; |
d0bce605 | 1426 | int rc; |
b0c632db | 1427 | |
d0bce605 HC |
1428 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
1429 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 1430 | return -EFAULT; |
d0bce605 HC |
1431 | gpa = SAVE_AREA_BASE; |
1432 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { | |
1433 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 1434 | return -EFAULT; |
d0bce605 HC |
1435 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
1436 | } | |
1437 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), | |
1438 | vcpu->arch.guest_fpregs.fprs, 128); | |
1439 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), | |
1440 | vcpu->run->s.regs.gprs, 128); | |
1441 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), | |
1442 | &vcpu->arch.sie_block->gpsw, 16); | |
fda902cb | 1443 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 | 1444 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
fda902cb | 1445 | &px, 4); |
d0bce605 HC |
1446 | rc |= write_guest_abs(vcpu, |
1447 | gpa + offsetof(struct save_area, fp_ctrl_reg), | |
1448 | &vcpu->arch.guest_fpregs.fpc, 4); | |
1449 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), | |
1450 | &vcpu->arch.sie_block->todpr, 4); | |
1451 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), | |
1452 | &vcpu->arch.sie_block->cputm, 8); | |
178bd789 | 1453 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d0bce605 HC |
1454 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
1455 | &clkcomp, 8); | |
1456 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), | |
1457 | &vcpu->run->s.regs.acrs, 64); | |
1458 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), | |
1459 | &vcpu->arch.sie_block->gcr, 128); | |
1460 | return rc ? -EFAULT : 0; | |
b0c632db HC |
1461 | } |
1462 | ||
e879892c TH |
1463 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
1464 | { | |
1465 | /* | |
1466 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
1467 | * copying in vcpu load/put. Lets update our copies before we save | |
1468 | * it into the save area | |
1469 | */ | |
1470 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1471 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1472 | save_access_regs(vcpu->run->s.regs.acrs); | |
1473 | ||
1474 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
1475 | } | |
1476 | ||
8ad35755 DH |
1477 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
1478 | { | |
1479 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
1480 | kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu); | |
1481 | exit_sie_sync(vcpu); | |
1482 | } | |
1483 | ||
1484 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
1485 | { | |
1486 | unsigned int i; | |
1487 | struct kvm_vcpu *vcpu; | |
1488 | ||
1489 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1490 | __disable_ibs_on_vcpu(vcpu); | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
1495 | { | |
1496 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
1497 | kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu); | |
1498 | exit_sie_sync(vcpu); | |
1499 | } | |
1500 | ||
6852d7b6 DH |
1501 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
1502 | { | |
8ad35755 DH |
1503 | int i, online_vcpus, started_vcpus = 0; |
1504 | ||
1505 | if (!is_vcpu_stopped(vcpu)) | |
1506 | return; | |
1507 | ||
6852d7b6 | 1508 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 1509 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 1510 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
1511 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
1512 | ||
1513 | for (i = 0; i < online_vcpus; i++) { | |
1514 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
1515 | started_vcpus++; | |
1516 | } | |
1517 | ||
1518 | if (started_vcpus == 0) { | |
1519 | /* we're the only active VCPU -> speed it up */ | |
1520 | __enable_ibs_on_vcpu(vcpu); | |
1521 | } else if (started_vcpus == 1) { | |
1522 | /* | |
1523 | * As we are starting a second VCPU, we have to disable | |
1524 | * the IBS facility on all VCPUs to remove potentially | |
1525 | * oustanding ENABLE requests. | |
1526 | */ | |
1527 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
1528 | } | |
1529 | ||
6852d7b6 | 1530 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
1531 | /* |
1532 | * Another VCPU might have used IBS while we were offline. | |
1533 | * Let's play safe and flush the VCPU at startup. | |
1534 | */ | |
d3d692c8 | 1535 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 1536 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 1537 | return; |
6852d7b6 DH |
1538 | } |
1539 | ||
1540 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
1541 | { | |
8ad35755 DH |
1542 | int i, online_vcpus, started_vcpus = 0; |
1543 | struct kvm_vcpu *started_vcpu = NULL; | |
1544 | ||
1545 | if (is_vcpu_stopped(vcpu)) | |
1546 | return; | |
1547 | ||
6852d7b6 | 1548 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 1549 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 1550 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
1551 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
1552 | ||
32f5ff63 | 1553 | /* Need to lock access to action_bits to avoid a SIGP race condition */ |
4ae3c081 | 1554 | spin_lock(&vcpu->arch.local_int.lock); |
6852d7b6 | 1555 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
32f5ff63 DH |
1556 | |
1557 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ | |
1558 | vcpu->arch.local_int.action_bits &= | |
1559 | ~(ACTION_STOP_ON_STOP | ACTION_STORE_ON_STOP); | |
4ae3c081 | 1560 | spin_unlock(&vcpu->arch.local_int.lock); |
32f5ff63 | 1561 | |
8ad35755 DH |
1562 | __disable_ibs_on_vcpu(vcpu); |
1563 | ||
1564 | for (i = 0; i < online_vcpus; i++) { | |
1565 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
1566 | started_vcpus++; | |
1567 | started_vcpu = vcpu->kvm->vcpus[i]; | |
1568 | } | |
1569 | } | |
1570 | ||
1571 | if (started_vcpus == 1) { | |
1572 | /* | |
1573 | * As we only have one VCPU left, we want to enable the | |
1574 | * IBS facility for that VCPU to speed it up. | |
1575 | */ | |
1576 | __enable_ibs_on_vcpu(started_vcpu); | |
1577 | } | |
1578 | ||
433b9ee4 | 1579 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 1580 | return; |
6852d7b6 DH |
1581 | } |
1582 | ||
d6712df9 CH |
1583 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
1584 | struct kvm_enable_cap *cap) | |
1585 | { | |
1586 | int r; | |
1587 | ||
1588 | if (cap->flags) | |
1589 | return -EINVAL; | |
1590 | ||
1591 | switch (cap->cap) { | |
fa6b7fe9 CH |
1592 | case KVM_CAP_S390_CSS_SUPPORT: |
1593 | if (!vcpu->kvm->arch.css_support) { | |
1594 | vcpu->kvm->arch.css_support = 1; | |
1595 | trace_kvm_s390_enable_css(vcpu->kvm); | |
1596 | } | |
1597 | r = 0; | |
1598 | break; | |
d6712df9 CH |
1599 | default: |
1600 | r = -EINVAL; | |
1601 | break; | |
1602 | } | |
1603 | return r; | |
1604 | } | |
1605 | ||
b0c632db HC |
1606 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1607 | unsigned int ioctl, unsigned long arg) | |
1608 | { | |
1609 | struct kvm_vcpu *vcpu = filp->private_data; | |
1610 | void __user *argp = (void __user *)arg; | |
800c1065 | 1611 | int idx; |
bc923cc9 | 1612 | long r; |
b0c632db | 1613 | |
93736624 AK |
1614 | switch (ioctl) { |
1615 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
1616 | struct kvm_s390_interrupt s390int; |
1617 | ||
93736624 | 1618 | r = -EFAULT; |
ba5c1e9b | 1619 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
1620 | break; |
1621 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
1622 | break; | |
ba5c1e9b | 1623 | } |
b0c632db | 1624 | case KVM_S390_STORE_STATUS: |
800c1065 | 1625 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 1626 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 1627 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 1628 | break; |
b0c632db HC |
1629 | case KVM_S390_SET_INITIAL_PSW: { |
1630 | psw_t psw; | |
1631 | ||
bc923cc9 | 1632 | r = -EFAULT; |
b0c632db | 1633 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
1634 | break; |
1635 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
1636 | break; | |
b0c632db HC |
1637 | } |
1638 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
1639 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
1640 | break; | |
14eebd91 CO |
1641 | case KVM_SET_ONE_REG: |
1642 | case KVM_GET_ONE_REG: { | |
1643 | struct kvm_one_reg reg; | |
1644 | r = -EFAULT; | |
1645 | if (copy_from_user(®, argp, sizeof(reg))) | |
1646 | break; | |
1647 | if (ioctl == KVM_SET_ONE_REG) | |
1648 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
1649 | else | |
1650 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
1651 | break; | |
1652 | } | |
27e0393f CO |
1653 | #ifdef CONFIG_KVM_S390_UCONTROL |
1654 | case KVM_S390_UCAS_MAP: { | |
1655 | struct kvm_s390_ucas_mapping ucasmap; | |
1656 | ||
1657 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1658 | r = -EFAULT; | |
1659 | break; | |
1660 | } | |
1661 | ||
1662 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1663 | r = -EINVAL; | |
1664 | break; | |
1665 | } | |
1666 | ||
1667 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
1668 | ucasmap.vcpu_addr, ucasmap.length); | |
1669 | break; | |
1670 | } | |
1671 | case KVM_S390_UCAS_UNMAP: { | |
1672 | struct kvm_s390_ucas_mapping ucasmap; | |
1673 | ||
1674 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1675 | r = -EFAULT; | |
1676 | break; | |
1677 | } | |
1678 | ||
1679 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1680 | r = -EINVAL; | |
1681 | break; | |
1682 | } | |
1683 | ||
1684 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
1685 | ucasmap.length); | |
1686 | break; | |
1687 | } | |
1688 | #endif | |
ccc7910f | 1689 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 1690 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
1691 | break; |
1692 | } | |
d6712df9 CH |
1693 | case KVM_ENABLE_CAP: |
1694 | { | |
1695 | struct kvm_enable_cap cap; | |
1696 | r = -EFAULT; | |
1697 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1698 | break; | |
1699 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
1700 | break; | |
1701 | } | |
b0c632db | 1702 | default: |
3e6afcf1 | 1703 | r = -ENOTTY; |
b0c632db | 1704 | } |
bc923cc9 | 1705 | return r; |
b0c632db HC |
1706 | } |
1707 | ||
5b1c1493 CO |
1708 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
1709 | { | |
1710 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1711 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
1712 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
1713 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
1714 | get_page(vmf->page); | |
1715 | return 0; | |
1716 | } | |
1717 | #endif | |
1718 | return VM_FAULT_SIGBUS; | |
1719 | } | |
1720 | ||
5587027c AK |
1721 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
1722 | unsigned long npages) | |
db3fe4eb TY |
1723 | { |
1724 | return 0; | |
1725 | } | |
1726 | ||
b0c632db | 1727 | /* Section: memory related */ |
f7784b8e MT |
1728 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
1729 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
1730 | struct kvm_userspace_memory_region *mem, |
1731 | enum kvm_mr_change change) | |
b0c632db | 1732 | { |
dd2887e7 NW |
1733 | /* A few sanity checks. We can have memory slots which have to be |
1734 | located/ended at a segment boundary (1MB). The memory in userland is | |
1735 | ok to be fragmented into various different vmas. It is okay to mmap() | |
1736 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 1737 | |
598841ca | 1738 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
1739 | return -EINVAL; |
1740 | ||
598841ca | 1741 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
1742 | return -EINVAL; |
1743 | ||
f7784b8e MT |
1744 | return 0; |
1745 | } | |
1746 | ||
1747 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
1748 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
1749 | const struct kvm_memory_slot *old, |
1750 | enum kvm_mr_change change) | |
f7784b8e | 1751 | { |
f7850c92 | 1752 | int rc; |
f7784b8e | 1753 | |
2cef4deb CB |
1754 | /* If the basics of the memslot do not change, we do not want |
1755 | * to update the gmap. Every update causes several unnecessary | |
1756 | * segment translation exceptions. This is usually handled just | |
1757 | * fine by the normal fault handler + gmap, but it will also | |
1758 | * cause faults on the prefix page of running guest CPUs. | |
1759 | */ | |
1760 | if (old->userspace_addr == mem->userspace_addr && | |
1761 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
1762 | old->npages * PAGE_SIZE == mem->memory_size) | |
1763 | return; | |
598841ca CO |
1764 | |
1765 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
1766 | mem->guest_phys_addr, mem->memory_size); | |
1767 | if (rc) | |
f7850c92 | 1768 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 1769 | return; |
b0c632db HC |
1770 | } |
1771 | ||
b0c632db HC |
1772 | static int __init kvm_s390_init(void) |
1773 | { | |
ef50f7ac | 1774 | int ret; |
0ee75bea | 1775 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
1776 | if (ret) |
1777 | return ret; | |
1778 | ||
1779 | /* | |
1780 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 1781 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
1782 | * only set facilities that are known to work in KVM. |
1783 | */ | |
78c4b59f MM |
1784 | vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
1785 | if (!vfacilities) { | |
ef50f7ac CB |
1786 | kvm_exit(); |
1787 | return -ENOMEM; | |
1788 | } | |
78c4b59f | 1789 | memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); |
7be81a46 | 1790 | vfacilities[0] &= 0xff82fffbf47c2000UL; |
7feb6bb8 | 1791 | vfacilities[1] &= 0x005c000000000000UL; |
ef50f7ac | 1792 | return 0; |
b0c632db HC |
1793 | } |
1794 | ||
1795 | static void __exit kvm_s390_exit(void) | |
1796 | { | |
78c4b59f | 1797 | free_page((unsigned long) vfacilities); |
b0c632db HC |
1798 | kvm_exit(); |
1799 | } | |
1800 | ||
1801 | module_init(kvm_s390_init); | |
1802 | module_exit(kvm_s390_exit); | |
566af940 CH |
1803 | |
1804 | /* | |
1805 | * Enable autoloading of the kvm module. | |
1806 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
1807 | * since x86 takes a different approach. | |
1808 | */ | |
1809 | #include <linux/miscdevice.h> | |
1810 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
1811 | MODULE_ALIAS("devname:kvm"); |