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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) }, | |
f5e10b09 | 53 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 54 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
55 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
56 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 57 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 58 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
59 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
60 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
61 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
62 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
63 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
64 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
65 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 66 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
67 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
68 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
69 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
70 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
71 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 72 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
73 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
74 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 75 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
76 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
77 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 78 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 79 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 80 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 81 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
82 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
83 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
84 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
85 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
86 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 87 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 88 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 89 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
90 | { NULL } |
91 | }; | |
92 | ||
78c4b59f | 93 | unsigned long *vfacilities; |
2c70fe44 | 94 | static struct gmap_notifier gmap_notifier; |
b0c632db | 95 | |
78c4b59f | 96 | /* test availability of vfacility */ |
280ef0f1 | 97 | int test_vfacility(unsigned long nr) |
78c4b59f MM |
98 | { |
99 | return __test_facility(nr, (void *) vfacilities); | |
100 | } | |
101 | ||
b0c632db | 102 | /* Section: not file related */ |
10474ae8 | 103 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
104 | { |
105 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 106 | return 0; |
b0c632db HC |
107 | } |
108 | ||
109 | void kvm_arch_hardware_disable(void *garbage) | |
110 | { | |
111 | } | |
112 | ||
2c70fe44 CB |
113 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
114 | ||
b0c632db HC |
115 | int kvm_arch_hardware_setup(void) |
116 | { | |
2c70fe44 CB |
117 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
118 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
119 | return 0; |
120 | } | |
121 | ||
122 | void kvm_arch_hardware_unsetup(void) | |
123 | { | |
2c70fe44 | 124 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
125 | } |
126 | ||
127 | void kvm_arch_check_processor_compat(void *rtn) | |
128 | { | |
129 | } | |
130 | ||
131 | int kvm_arch_init(void *opaque) | |
132 | { | |
133 | return 0; | |
134 | } | |
135 | ||
136 | void kvm_arch_exit(void) | |
137 | { | |
138 | } | |
139 | ||
140 | /* Section: device related */ | |
141 | long kvm_arch_dev_ioctl(struct file *filp, | |
142 | unsigned int ioctl, unsigned long arg) | |
143 | { | |
144 | if (ioctl == KVM_S390_ENABLE_SIE) | |
145 | return s390_enable_sie(); | |
146 | return -EINVAL; | |
147 | } | |
148 | ||
149 | int kvm_dev_ioctl_check_extension(long ext) | |
150 | { | |
d7b0b5eb CO |
151 | int r; |
152 | ||
2bd0ac4e | 153 | switch (ext) { |
d7b0b5eb | 154 | case KVM_CAP_S390_PSW: |
b6cf8788 | 155 | case KVM_CAP_S390_GMAP: |
52e16b18 | 156 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
157 | #ifdef CONFIG_KVM_S390_UCONTROL |
158 | case KVM_CAP_S390_UCONTROL: | |
159 | #endif | |
3c038e6b | 160 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 161 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 162 | case KVM_CAP_ONE_REG: |
d6712df9 | 163 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 164 | case KVM_CAP_S390_CSS_SUPPORT: |
ebc32262 | 165 | case KVM_CAP_IRQFD: |
10ccaa1e | 166 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 167 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 168 | case KVM_CAP_ENABLE_CAP_VM: |
f2061656 | 169 | case KVM_CAP_VM_ATTRIBUTES: |
d7b0b5eb CO |
170 | r = 1; |
171 | break; | |
e726b1bd CB |
172 | case KVM_CAP_NR_VCPUS: |
173 | case KVM_CAP_MAX_VCPUS: | |
174 | r = KVM_MAX_VCPUS; | |
175 | break; | |
e1e2e605 NW |
176 | case KVM_CAP_NR_MEMSLOTS: |
177 | r = KVM_USER_MEM_SLOTS; | |
178 | break; | |
1526bf9c | 179 | case KVM_CAP_S390_COW: |
abf09bed | 180 | r = MACHINE_HAS_ESOP; |
1526bf9c | 181 | break; |
2bd0ac4e | 182 | default: |
d7b0b5eb | 183 | r = 0; |
2bd0ac4e | 184 | } |
d7b0b5eb | 185 | return r; |
b0c632db HC |
186 | } |
187 | ||
15f36ebd JH |
188 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
189 | struct kvm_memory_slot *memslot) | |
190 | { | |
191 | gfn_t cur_gfn, last_gfn; | |
192 | unsigned long address; | |
193 | struct gmap *gmap = kvm->arch.gmap; | |
194 | ||
195 | down_read(&gmap->mm->mmap_sem); | |
196 | /* Loop over all guest pages */ | |
197 | last_gfn = memslot->base_gfn + memslot->npages; | |
198 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
199 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
200 | ||
201 | if (gmap_test_and_clear_dirty(address, gmap)) | |
202 | mark_page_dirty(kvm, cur_gfn); | |
203 | } | |
204 | up_read(&gmap->mm->mmap_sem); | |
205 | } | |
206 | ||
b0c632db HC |
207 | /* Section: vm related */ |
208 | /* | |
209 | * Get (and clear) the dirty memory log for a memory slot. | |
210 | */ | |
211 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
212 | struct kvm_dirty_log *log) | |
213 | { | |
15f36ebd JH |
214 | int r; |
215 | unsigned long n; | |
216 | struct kvm_memory_slot *memslot; | |
217 | int is_dirty = 0; | |
218 | ||
219 | mutex_lock(&kvm->slots_lock); | |
220 | ||
221 | r = -EINVAL; | |
222 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
223 | goto out; | |
224 | ||
225 | memslot = id_to_memslot(kvm->memslots, log->slot); | |
226 | r = -ENOENT; | |
227 | if (!memslot->dirty_bitmap) | |
228 | goto out; | |
229 | ||
230 | kvm_s390_sync_dirty_log(kvm, memslot); | |
231 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
232 | if (r) | |
233 | goto out; | |
234 | ||
235 | /* Clear the dirty log */ | |
236 | if (is_dirty) { | |
237 | n = kvm_dirty_bitmap_bytes(memslot); | |
238 | memset(memslot->dirty_bitmap, 0, n); | |
239 | } | |
240 | r = 0; | |
241 | out: | |
242 | mutex_unlock(&kvm->slots_lock); | |
243 | return r; | |
b0c632db HC |
244 | } |
245 | ||
d938dc55 CH |
246 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
247 | { | |
248 | int r; | |
249 | ||
250 | if (cap->flags) | |
251 | return -EINVAL; | |
252 | ||
253 | switch (cap->cap) { | |
84223598 CH |
254 | case KVM_CAP_S390_IRQCHIP: |
255 | kvm->arch.use_irqchip = 1; | |
256 | r = 0; | |
257 | break; | |
d938dc55 CH |
258 | default: |
259 | r = -EINVAL; | |
260 | break; | |
261 | } | |
262 | return r; | |
263 | } | |
264 | ||
4f718eab DD |
265 | static int kvm_s390_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
266 | { | |
267 | int ret; | |
268 | unsigned int idx; | |
269 | switch (attr->attr) { | |
270 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
271 | ret = -EBUSY; | |
272 | mutex_lock(&kvm->lock); | |
273 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
274 | kvm->arch.use_cmma = 1; | |
275 | ret = 0; | |
276 | } | |
277 | mutex_unlock(&kvm->lock); | |
278 | break; | |
279 | case KVM_S390_VM_MEM_CLR_CMMA: | |
280 | mutex_lock(&kvm->lock); | |
281 | idx = srcu_read_lock(&kvm->srcu); | |
282 | page_table_reset_pgste(kvm->arch.gmap->mm, 0, TASK_SIZE, false); | |
283 | srcu_read_unlock(&kvm->srcu, idx); | |
284 | mutex_unlock(&kvm->lock); | |
285 | ret = 0; | |
286 | break; | |
287 | default: | |
288 | ret = -ENXIO; | |
289 | break; | |
290 | } | |
291 | return ret; | |
292 | } | |
293 | ||
f2061656 DD |
294 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
295 | { | |
296 | int ret; | |
297 | ||
298 | switch (attr->group) { | |
4f718eab DD |
299 | case KVM_S390_VM_MEM_CTRL: |
300 | ret = kvm_s390_mem_control(kvm, attr); | |
301 | break; | |
f2061656 DD |
302 | default: |
303 | ret = -ENXIO; | |
304 | break; | |
305 | } | |
306 | ||
307 | return ret; | |
308 | } | |
309 | ||
310 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
311 | { | |
312 | return -ENXIO; | |
313 | } | |
314 | ||
315 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
316 | { | |
317 | int ret; | |
318 | ||
319 | switch (attr->group) { | |
4f718eab DD |
320 | case KVM_S390_VM_MEM_CTRL: |
321 | switch (attr->attr) { | |
322 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
323 | case KVM_S390_VM_MEM_CLR_CMMA: | |
324 | ret = 0; | |
325 | break; | |
326 | default: | |
327 | ret = -ENXIO; | |
328 | break; | |
329 | } | |
330 | break; | |
f2061656 DD |
331 | default: |
332 | ret = -ENXIO; | |
333 | break; | |
334 | } | |
335 | ||
336 | return ret; | |
337 | } | |
338 | ||
b0c632db HC |
339 | long kvm_arch_vm_ioctl(struct file *filp, |
340 | unsigned int ioctl, unsigned long arg) | |
341 | { | |
342 | struct kvm *kvm = filp->private_data; | |
343 | void __user *argp = (void __user *)arg; | |
f2061656 | 344 | struct kvm_device_attr attr; |
b0c632db HC |
345 | int r; |
346 | ||
347 | switch (ioctl) { | |
ba5c1e9b CO |
348 | case KVM_S390_INTERRUPT: { |
349 | struct kvm_s390_interrupt s390int; | |
350 | ||
351 | r = -EFAULT; | |
352 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
353 | break; | |
354 | r = kvm_s390_inject_vm(kvm, &s390int); | |
355 | break; | |
356 | } | |
d938dc55 CH |
357 | case KVM_ENABLE_CAP: { |
358 | struct kvm_enable_cap cap; | |
359 | r = -EFAULT; | |
360 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
361 | break; | |
362 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
363 | break; | |
364 | } | |
84223598 CH |
365 | case KVM_CREATE_IRQCHIP: { |
366 | struct kvm_irq_routing_entry routing; | |
367 | ||
368 | r = -EINVAL; | |
369 | if (kvm->arch.use_irqchip) { | |
370 | /* Set up dummy routing. */ | |
371 | memset(&routing, 0, sizeof(routing)); | |
372 | kvm_set_irq_routing(kvm, &routing, 0, 0); | |
373 | r = 0; | |
374 | } | |
375 | break; | |
376 | } | |
f2061656 DD |
377 | case KVM_SET_DEVICE_ATTR: { |
378 | r = -EFAULT; | |
379 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
380 | break; | |
381 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
382 | break; | |
383 | } | |
384 | case KVM_GET_DEVICE_ATTR: { | |
385 | r = -EFAULT; | |
386 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
387 | break; | |
388 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
389 | break; | |
390 | } | |
391 | case KVM_HAS_DEVICE_ATTR: { | |
392 | r = -EFAULT; | |
393 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
394 | break; | |
395 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
396 | break; | |
397 | } | |
b0c632db | 398 | default: |
367e1319 | 399 | r = -ENOTTY; |
b0c632db HC |
400 | } |
401 | ||
402 | return r; | |
403 | } | |
404 | ||
e08b9637 | 405 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 406 | { |
b0c632db HC |
407 | int rc; |
408 | char debug_name[16]; | |
f6c137ff | 409 | static unsigned long sca_offset; |
b0c632db | 410 | |
e08b9637 CO |
411 | rc = -EINVAL; |
412 | #ifdef CONFIG_KVM_S390_UCONTROL | |
413 | if (type & ~KVM_VM_S390_UCONTROL) | |
414 | goto out_err; | |
415 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
416 | goto out_err; | |
417 | #else | |
418 | if (type) | |
419 | goto out_err; | |
420 | #endif | |
421 | ||
b0c632db HC |
422 | rc = s390_enable_sie(); |
423 | if (rc) | |
d89f5eff | 424 | goto out_err; |
b0c632db | 425 | |
b290411a CO |
426 | rc = -ENOMEM; |
427 | ||
b0c632db HC |
428 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
429 | if (!kvm->arch.sca) | |
d89f5eff | 430 | goto out_err; |
f6c137ff CB |
431 | spin_lock(&kvm_lock); |
432 | sca_offset = (sca_offset + 16) & 0x7f0; | |
433 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); | |
434 | spin_unlock(&kvm_lock); | |
b0c632db HC |
435 | |
436 | sprintf(debug_name, "kvm-%u", current->pid); | |
437 | ||
438 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
439 | if (!kvm->arch.dbf) | |
440 | goto out_nodbf; | |
441 | ||
ba5c1e9b CO |
442 | spin_lock_init(&kvm->arch.float_int.lock); |
443 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
8a242234 | 444 | init_waitqueue_head(&kvm->arch.ipte_wq); |
ba5c1e9b | 445 | |
b0c632db HC |
446 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
447 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
448 | ||
e08b9637 CO |
449 | if (type & KVM_VM_S390_UCONTROL) { |
450 | kvm->arch.gmap = NULL; | |
451 | } else { | |
452 | kvm->arch.gmap = gmap_alloc(current->mm); | |
453 | if (!kvm->arch.gmap) | |
454 | goto out_nogmap; | |
2c70fe44 | 455 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 456 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 457 | } |
fa6b7fe9 CH |
458 | |
459 | kvm->arch.css_support = 0; | |
84223598 | 460 | kvm->arch.use_irqchip = 0; |
fa6b7fe9 | 461 | |
8ad35755 DH |
462 | spin_lock_init(&kvm->arch.start_stop_lock); |
463 | ||
d89f5eff | 464 | return 0; |
598841ca CO |
465 | out_nogmap: |
466 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
467 | out_nodbf: |
468 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
469 | out_err: |
470 | return rc; | |
b0c632db HC |
471 | } |
472 | ||
d329c035 CB |
473 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
474 | { | |
475 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 476 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 477 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 478 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
479 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
480 | clear_bit(63 - vcpu->vcpu_id, | |
481 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
482 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
483 | (__u64) vcpu->arch.sie_block) | |
484 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
485 | } | |
abf4a71e | 486 | smp_mb(); |
27e0393f CO |
487 | |
488 | if (kvm_is_ucontrol(vcpu->kvm)) | |
489 | gmap_free(vcpu->arch.gmap); | |
490 | ||
b31605c1 DD |
491 | if (kvm_s390_cmma_enabled(vcpu->kvm)) |
492 | kvm_s390_vcpu_unsetup_cmma(vcpu); | |
d329c035 | 493 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 494 | |
6692cef3 | 495 | kvm_vcpu_uninit(vcpu); |
b110feaf | 496 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
497 | } |
498 | ||
499 | static void kvm_free_vcpus(struct kvm *kvm) | |
500 | { | |
501 | unsigned int i; | |
988a2cae | 502 | struct kvm_vcpu *vcpu; |
d329c035 | 503 | |
988a2cae GN |
504 | kvm_for_each_vcpu(i, vcpu, kvm) |
505 | kvm_arch_vcpu_destroy(vcpu); | |
506 | ||
507 | mutex_lock(&kvm->lock); | |
508 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
509 | kvm->vcpus[i] = NULL; | |
510 | ||
511 | atomic_set(&kvm->online_vcpus, 0); | |
512 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
513 | } |
514 | ||
ad8ba2cd SY |
515 | void kvm_arch_sync_events(struct kvm *kvm) |
516 | { | |
517 | } | |
518 | ||
b0c632db HC |
519 | void kvm_arch_destroy_vm(struct kvm *kvm) |
520 | { | |
d329c035 | 521 | kvm_free_vcpus(kvm); |
b0c632db | 522 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 523 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
524 | if (!kvm_is_ucontrol(kvm)) |
525 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 526 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 527 | kvm_s390_clear_float_irqs(kvm); |
b0c632db HC |
528 | } |
529 | ||
530 | /* Section: vcpu related */ | |
531 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
532 | { | |
3c038e6b DD |
533 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
534 | kvm_clear_async_pf_completion_queue(vcpu); | |
27e0393f CO |
535 | if (kvm_is_ucontrol(vcpu->kvm)) { |
536 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
537 | if (!vcpu->arch.gmap) | |
538 | return -ENOMEM; | |
2c70fe44 | 539 | vcpu->arch.gmap->private = vcpu->kvm; |
27e0393f CO |
540 | return 0; |
541 | } | |
542 | ||
598841ca | 543 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
544 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
545 | KVM_SYNC_GPRS | | |
9eed0735 CB |
546 | KVM_SYNC_ACRS | |
547 | KVM_SYNC_CRS; | |
b0c632db HC |
548 | return 0; |
549 | } | |
550 | ||
551 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
552 | { | |
6692cef3 | 553 | /* Nothing todo */ |
b0c632db HC |
554 | } |
555 | ||
556 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
557 | { | |
4725c860 MS |
558 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
559 | save_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db | 560 | save_access_regs(vcpu->arch.host_acrs); |
4725c860 MS |
561 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
562 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 563 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 564 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 565 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
566 | } |
567 | ||
568 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
569 | { | |
9e6dabef | 570 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 571 | gmap_disable(vcpu->arch.gmap); |
4725c860 MS |
572 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
573 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 574 | save_access_regs(vcpu->run->s.regs.acrs); |
4725c860 MS |
575 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
576 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db HC |
577 | restore_access_regs(vcpu->arch.host_acrs); |
578 | } | |
579 | ||
580 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
581 | { | |
582 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
583 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
584 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 585 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
586 | vcpu->arch.sie_block->cputm = 0UL; |
587 | vcpu->arch.sie_block->ckc = 0UL; | |
588 | vcpu->arch.sie_block->todpr = 0; | |
589 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
590 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
591 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
592 | vcpu->arch.guest_fpregs.fpc = 0; | |
593 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
594 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 595 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
596 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
597 | kvm_clear_async_pf_completion_queue(vcpu); | |
6852d7b6 | 598 | kvm_s390_vcpu_stop(vcpu); |
2ed10cc1 | 599 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
600 | } |
601 | ||
42897d86 MT |
602 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
603 | { | |
604 | return 0; | |
605 | } | |
606 | ||
b31605c1 DD |
607 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
608 | { | |
609 | free_page(vcpu->arch.sie_block->cbrlo); | |
610 | vcpu->arch.sie_block->cbrlo = 0; | |
611 | } | |
612 | ||
613 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
614 | { | |
615 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
616 | if (!vcpu->arch.sie_block->cbrlo) | |
617 | return -ENOMEM; | |
618 | ||
619 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
620 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
621 | return 0; | |
622 | } | |
623 | ||
b0c632db HC |
624 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
625 | { | |
b31605c1 | 626 | int rc = 0; |
b31288fa | 627 | |
9e6dabef CH |
628 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
629 | CPUSTAT_SM | | |
69d0d3a3 CB |
630 | CPUSTAT_STOPPED | |
631 | CPUSTAT_GED); | |
fc34531d | 632 | vcpu->arch.sie_block->ecb = 6; |
7feb6bb8 MM |
633 | if (test_vfacility(50) && test_vfacility(73)) |
634 | vcpu->arch.sie_block->ecb |= 0x10; | |
635 | ||
69d0d3a3 | 636 | vcpu->arch.sie_block->ecb2 = 8; |
4953919f | 637 | vcpu->arch.sie_block->eca = 0xD1002000U; |
217a4406 HC |
638 | if (sclp_has_siif()) |
639 | vcpu->arch.sie_block->eca |= 1; | |
78c4b59f | 640 | vcpu->arch.sie_block->fac = (int) (long) vfacilities; |
5a5e6536 MR |
641 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE | |
642 | ICTL_TPROT; | |
643 | ||
b31605c1 DD |
644 | if (kvm_s390_cmma_enabled(vcpu->kvm)) { |
645 | rc = kvm_s390_vcpu_setup_cmma(vcpu); | |
646 | if (rc) | |
647 | return rc; | |
b31288fa | 648 | } |
ca872302 CB |
649 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
650 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
651 | (unsigned long) vcpu); | |
652 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 653 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 654 | vcpu->arch.cpu_id.version = 0xff; |
b31605c1 | 655 | return rc; |
b0c632db HC |
656 | } |
657 | ||
658 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
659 | unsigned int id) | |
660 | { | |
4d47555a | 661 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 662 | struct sie_page *sie_page; |
4d47555a CO |
663 | int rc = -EINVAL; |
664 | ||
665 | if (id >= KVM_MAX_VCPUS) | |
666 | goto out; | |
667 | ||
668 | rc = -ENOMEM; | |
b0c632db | 669 | |
b110feaf | 670 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 671 | if (!vcpu) |
4d47555a | 672 | goto out; |
b0c632db | 673 | |
7feb6bb8 MM |
674 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
675 | if (!sie_page) | |
b0c632db HC |
676 | goto out_free_cpu; |
677 | ||
7feb6bb8 MM |
678 | vcpu->arch.sie_block = &sie_page->sie_block; |
679 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
680 | ||
b0c632db | 681 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
682 | if (!kvm_is_ucontrol(kvm)) { |
683 | if (!kvm->arch.sca) { | |
684 | WARN_ON_ONCE(1); | |
685 | goto out_free_cpu; | |
686 | } | |
687 | if (!kvm->arch.sca->cpu[id].sda) | |
688 | kvm->arch.sca->cpu[id].sda = | |
689 | (__u64) vcpu->arch.sie_block; | |
690 | vcpu->arch.sie_block->scaoh = | |
691 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
692 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
693 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
694 | } | |
b0c632db | 695 | |
ba5c1e9b CO |
696 | spin_lock_init(&vcpu->arch.local_int.lock); |
697 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
698 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
d0321a24 | 699 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 700 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 701 | |
b0c632db HC |
702 | rc = kvm_vcpu_init(vcpu, kvm, id); |
703 | if (rc) | |
7b06bf2f | 704 | goto out_free_sie_block; |
b0c632db HC |
705 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
706 | vcpu->arch.sie_block); | |
ade38c31 | 707 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 708 | |
b0c632db | 709 | return vcpu; |
7b06bf2f WY |
710 | out_free_sie_block: |
711 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 712 | out_free_cpu: |
b110feaf | 713 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 714 | out: |
b0c632db HC |
715 | return ERR_PTR(rc); |
716 | } | |
717 | ||
b0c632db HC |
718 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
719 | { | |
f87618e8 | 720 | return kvm_cpu_has_interrupt(vcpu); |
b0c632db HC |
721 | } |
722 | ||
49b99e1e CB |
723 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
724 | { | |
725 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
726 | } | |
727 | ||
728 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
729 | { | |
730 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
731 | } | |
732 | ||
733 | /* | |
734 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
735 | * If the CPU is not running (e.g. waiting as idle) the function will | |
736 | * return immediately. */ | |
737 | void exit_sie(struct kvm_vcpu *vcpu) | |
738 | { | |
739 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
740 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
741 | cpu_relax(); | |
742 | } | |
743 | ||
744 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
745 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
746 | { | |
747 | s390_vcpu_block(vcpu); | |
748 | exit_sie(vcpu); | |
749 | } | |
750 | ||
2c70fe44 CB |
751 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
752 | { | |
753 | int i; | |
754 | struct kvm *kvm = gmap->private; | |
755 | struct kvm_vcpu *vcpu; | |
756 | ||
757 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
758 | /* match against both prefix pages */ | |
fda902cb | 759 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 CB |
760 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
761 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
762 | exit_sie_sync(vcpu); | |
763 | } | |
764 | } | |
765 | } | |
766 | ||
b6d33834 CD |
767 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
768 | { | |
769 | /* kvm common code refers to this, but never calls it */ | |
770 | BUG(); | |
771 | return 0; | |
772 | } | |
773 | ||
14eebd91 CO |
774 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
775 | struct kvm_one_reg *reg) | |
776 | { | |
777 | int r = -EINVAL; | |
778 | ||
779 | switch (reg->id) { | |
29b7c71b CO |
780 | case KVM_REG_S390_TODPR: |
781 | r = put_user(vcpu->arch.sie_block->todpr, | |
782 | (u32 __user *)reg->addr); | |
783 | break; | |
784 | case KVM_REG_S390_EPOCHDIFF: | |
785 | r = put_user(vcpu->arch.sie_block->epoch, | |
786 | (u64 __user *)reg->addr); | |
787 | break; | |
46a6dd1c J |
788 | case KVM_REG_S390_CPU_TIMER: |
789 | r = put_user(vcpu->arch.sie_block->cputm, | |
790 | (u64 __user *)reg->addr); | |
791 | break; | |
792 | case KVM_REG_S390_CLOCK_COMP: | |
793 | r = put_user(vcpu->arch.sie_block->ckc, | |
794 | (u64 __user *)reg->addr); | |
795 | break; | |
536336c2 DD |
796 | case KVM_REG_S390_PFTOKEN: |
797 | r = put_user(vcpu->arch.pfault_token, | |
798 | (u64 __user *)reg->addr); | |
799 | break; | |
800 | case KVM_REG_S390_PFCOMPARE: | |
801 | r = put_user(vcpu->arch.pfault_compare, | |
802 | (u64 __user *)reg->addr); | |
803 | break; | |
804 | case KVM_REG_S390_PFSELECT: | |
805 | r = put_user(vcpu->arch.pfault_select, | |
806 | (u64 __user *)reg->addr); | |
807 | break; | |
672550fb CB |
808 | case KVM_REG_S390_PP: |
809 | r = put_user(vcpu->arch.sie_block->pp, | |
810 | (u64 __user *)reg->addr); | |
811 | break; | |
afa45ff5 CB |
812 | case KVM_REG_S390_GBEA: |
813 | r = put_user(vcpu->arch.sie_block->gbea, | |
814 | (u64 __user *)reg->addr); | |
815 | break; | |
14eebd91 CO |
816 | default: |
817 | break; | |
818 | } | |
819 | ||
820 | return r; | |
821 | } | |
822 | ||
823 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
824 | struct kvm_one_reg *reg) | |
825 | { | |
826 | int r = -EINVAL; | |
827 | ||
828 | switch (reg->id) { | |
29b7c71b CO |
829 | case KVM_REG_S390_TODPR: |
830 | r = get_user(vcpu->arch.sie_block->todpr, | |
831 | (u32 __user *)reg->addr); | |
832 | break; | |
833 | case KVM_REG_S390_EPOCHDIFF: | |
834 | r = get_user(vcpu->arch.sie_block->epoch, | |
835 | (u64 __user *)reg->addr); | |
836 | break; | |
46a6dd1c J |
837 | case KVM_REG_S390_CPU_TIMER: |
838 | r = get_user(vcpu->arch.sie_block->cputm, | |
839 | (u64 __user *)reg->addr); | |
840 | break; | |
841 | case KVM_REG_S390_CLOCK_COMP: | |
842 | r = get_user(vcpu->arch.sie_block->ckc, | |
843 | (u64 __user *)reg->addr); | |
844 | break; | |
536336c2 DD |
845 | case KVM_REG_S390_PFTOKEN: |
846 | r = get_user(vcpu->arch.pfault_token, | |
847 | (u64 __user *)reg->addr); | |
848 | break; | |
849 | case KVM_REG_S390_PFCOMPARE: | |
850 | r = get_user(vcpu->arch.pfault_compare, | |
851 | (u64 __user *)reg->addr); | |
852 | break; | |
853 | case KVM_REG_S390_PFSELECT: | |
854 | r = get_user(vcpu->arch.pfault_select, | |
855 | (u64 __user *)reg->addr); | |
856 | break; | |
672550fb CB |
857 | case KVM_REG_S390_PP: |
858 | r = get_user(vcpu->arch.sie_block->pp, | |
859 | (u64 __user *)reg->addr); | |
860 | break; | |
afa45ff5 CB |
861 | case KVM_REG_S390_GBEA: |
862 | r = get_user(vcpu->arch.sie_block->gbea, | |
863 | (u64 __user *)reg->addr); | |
864 | break; | |
14eebd91 CO |
865 | default: |
866 | break; | |
867 | } | |
868 | ||
869 | return r; | |
870 | } | |
b6d33834 | 871 | |
b0c632db HC |
872 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
873 | { | |
b0c632db | 874 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
875 | return 0; |
876 | } | |
877 | ||
878 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
879 | { | |
5a32c1af | 880 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
881 | return 0; |
882 | } | |
883 | ||
884 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
885 | { | |
5a32c1af | 886 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
887 | return 0; |
888 | } | |
889 | ||
890 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
891 | struct kvm_sregs *sregs) | |
892 | { | |
59674c1a | 893 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 894 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 895 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
896 | return 0; |
897 | } | |
898 | ||
899 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
900 | struct kvm_sregs *sregs) | |
901 | { | |
59674c1a | 902 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 903 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
904 | return 0; |
905 | } | |
906 | ||
907 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
908 | { | |
4725c860 MS |
909 | if (test_fp_ctl(fpu->fpc)) |
910 | return -EINVAL; | |
b0c632db | 911 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 MS |
912 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
913 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
914 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
b0c632db HC |
915 | return 0; |
916 | } | |
917 | ||
918 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
919 | { | |
b0c632db HC |
920 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
921 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
922 | return 0; |
923 | } | |
924 | ||
925 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
926 | { | |
927 | int rc = 0; | |
928 | ||
7a42fdc2 | 929 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 930 | rc = -EBUSY; |
d7b0b5eb CO |
931 | else { |
932 | vcpu->run->psw_mask = psw.mask; | |
933 | vcpu->run->psw_addr = psw.addr; | |
934 | } | |
b0c632db HC |
935 | return rc; |
936 | } | |
937 | ||
938 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
939 | struct kvm_translation *tr) | |
940 | { | |
941 | return -EINVAL; /* not implemented yet */ | |
942 | } | |
943 | ||
27291e21 DH |
944 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
945 | KVM_GUESTDBG_USE_HW_BP | \ | |
946 | KVM_GUESTDBG_ENABLE) | |
947 | ||
d0bfb940 JK |
948 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
949 | struct kvm_guest_debug *dbg) | |
b0c632db | 950 | { |
27291e21 DH |
951 | int rc = 0; |
952 | ||
953 | vcpu->guest_debug = 0; | |
954 | kvm_s390_clear_bp_data(vcpu); | |
955 | ||
2de3bfc2 | 956 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
957 | return -EINVAL; |
958 | ||
959 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
960 | vcpu->guest_debug = dbg->control; | |
961 | /* enforce guest PER */ | |
962 | atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
963 | ||
964 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
965 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
966 | } else { | |
967 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
968 | vcpu->arch.guestdbg.last_bp = 0; | |
969 | } | |
970 | ||
971 | if (rc) { | |
972 | vcpu->guest_debug = 0; | |
973 | kvm_s390_clear_bp_data(vcpu); | |
974 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
975 | } | |
976 | ||
977 | return rc; | |
b0c632db HC |
978 | } |
979 | ||
62d9f0db MT |
980 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
981 | struct kvm_mp_state *mp_state) | |
982 | { | |
983 | return -EINVAL; /* not implemented yet */ | |
984 | } | |
985 | ||
986 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
987 | struct kvm_mp_state *mp_state) | |
988 | { | |
989 | return -EINVAL; /* not implemented yet */ | |
990 | } | |
991 | ||
b31605c1 DD |
992 | bool kvm_s390_cmma_enabled(struct kvm *kvm) |
993 | { | |
994 | if (!MACHINE_IS_LPAR) | |
995 | return false; | |
996 | /* only enable for z10 and later */ | |
997 | if (!MACHINE_HAS_EDAT1) | |
998 | return false; | |
999 | if (!kvm->arch.use_cmma) | |
1000 | return false; | |
1001 | return true; | |
1002 | } | |
1003 | ||
8ad35755 DH |
1004 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
1005 | { | |
1006 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
1007 | } | |
1008 | ||
2c70fe44 CB |
1009 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
1010 | { | |
8ad35755 DH |
1011 | retry: |
1012 | s390_vcpu_unblock(vcpu); | |
2c70fe44 CB |
1013 | /* |
1014 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
1015 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
1016 | * This ensures that the ipte instruction for this request has | |
1017 | * already finished. We might race against a second unmapper that | |
1018 | * wants to set the blocking bit. Lets just retry the request loop. | |
1019 | */ | |
8ad35755 | 1020 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
1021 | int rc; |
1022 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 1023 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
1024 | PAGE_SIZE * 2); |
1025 | if (rc) | |
1026 | return rc; | |
8ad35755 | 1027 | goto retry; |
2c70fe44 | 1028 | } |
8ad35755 DH |
1029 | |
1030 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { | |
1031 | if (!ibs_enabled(vcpu)) { | |
1032 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
1033 | atomic_set_mask(CPUSTAT_IBS, | |
1034 | &vcpu->arch.sie_block->cpuflags); | |
1035 | } | |
1036 | goto retry; | |
2c70fe44 | 1037 | } |
8ad35755 DH |
1038 | |
1039 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
1040 | if (ibs_enabled(vcpu)) { | |
1041 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
1042 | atomic_clear_mask(CPUSTAT_IBS, | |
1043 | &vcpu->arch.sie_block->cpuflags); | |
1044 | } | |
1045 | goto retry; | |
1046 | } | |
1047 | ||
2c70fe44 CB |
1048 | return 0; |
1049 | } | |
1050 | ||
fa576c58 TH |
1051 | /** |
1052 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
1053 | * @vcpu: The corresponding virtual cpu | |
1054 | * @gpa: Guest physical address | |
1055 | * @writable: Whether the page should be writable or not | |
1056 | * | |
1057 | * Make sure that a guest page has been faulted-in on the host. | |
1058 | * | |
1059 | * Return: Zero on success, negative error code otherwise. | |
1060 | */ | |
1061 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 1062 | { |
24eb3a82 | 1063 | struct mm_struct *mm = current->mm; |
fa576c58 TH |
1064 | hva_t hva; |
1065 | long rc; | |
1066 | ||
1067 | hva = gmap_fault(gpa, vcpu->arch.gmap); | |
1068 | if (IS_ERR_VALUE(hva)) | |
1069 | return (long)hva; | |
24eb3a82 | 1070 | down_read(&mm->mmap_sem); |
fa576c58 | 1071 | rc = get_user_pages(current, mm, hva, 1, writable, 0, NULL, NULL); |
24eb3a82 | 1072 | up_read(&mm->mmap_sem); |
fa576c58 TH |
1073 | |
1074 | return rc < 0 ? rc : 0; | |
24eb3a82 DD |
1075 | } |
1076 | ||
3c038e6b DD |
1077 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
1078 | unsigned long token) | |
1079 | { | |
1080 | struct kvm_s390_interrupt inti; | |
1081 | inti.parm64 = token; | |
1082 | ||
1083 | if (start_token) { | |
1084 | inti.type = KVM_S390_INT_PFAULT_INIT; | |
1085 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &inti)); | |
1086 | } else { | |
1087 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
1088 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); | |
1089 | } | |
1090 | } | |
1091 | ||
1092 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
1093 | struct kvm_async_pf *work) | |
1094 | { | |
1095 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
1096 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
1097 | } | |
1098 | ||
1099 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
1100 | struct kvm_async_pf *work) | |
1101 | { | |
1102 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
1103 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
1104 | } | |
1105 | ||
1106 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
1107 | struct kvm_async_pf *work) | |
1108 | { | |
1109 | /* s390 will always inject the page directly */ | |
1110 | } | |
1111 | ||
1112 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
1113 | { | |
1114 | /* | |
1115 | * s390 will always inject the page directly, | |
1116 | * but we still want check_async_completion to cleanup | |
1117 | */ | |
1118 | return true; | |
1119 | } | |
1120 | ||
1121 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
1122 | { | |
1123 | hva_t hva; | |
1124 | struct kvm_arch_async_pf arch; | |
1125 | int rc; | |
1126 | ||
1127 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
1128 | return 0; | |
1129 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
1130 | vcpu->arch.pfault_compare) | |
1131 | return 0; | |
1132 | if (psw_extint_disabled(vcpu)) | |
1133 | return 0; | |
1134 | if (kvm_cpu_has_interrupt(vcpu)) | |
1135 | return 0; | |
1136 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
1137 | return 0; | |
1138 | if (!vcpu->arch.gmap->pfault_enabled) | |
1139 | return 0; | |
1140 | ||
81480cc1 HC |
1141 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
1142 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
1143 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
1144 | return 0; |
1145 | ||
1146 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
1147 | return rc; | |
1148 | } | |
1149 | ||
3fb4c40f | 1150 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 1151 | { |
3fb4c40f | 1152 | int rc, cpuflags; |
e168bf8d | 1153 | |
3c038e6b DD |
1154 | /* |
1155 | * On s390 notifications for arriving pages will be delivered directly | |
1156 | * to the guest but the house keeping for completed pfaults is | |
1157 | * handled outside the worker. | |
1158 | */ | |
1159 | kvm_check_async_pf_completion(vcpu); | |
1160 | ||
5a32c1af | 1161 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
1162 | |
1163 | if (need_resched()) | |
1164 | schedule(); | |
1165 | ||
d3a73acb | 1166 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
1167 | s390_handle_mcck(); |
1168 | ||
d6b6d166 CO |
1169 | if (!kvm_is_ucontrol(vcpu->kvm)) |
1170 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 1171 | |
2c70fe44 CB |
1172 | rc = kvm_s390_handle_requests(vcpu); |
1173 | if (rc) | |
1174 | return rc; | |
1175 | ||
27291e21 DH |
1176 | if (guestdbg_enabled(vcpu)) { |
1177 | kvm_s390_backup_guest_per_regs(vcpu); | |
1178 | kvm_s390_patch_guest_per_regs(vcpu); | |
1179 | } | |
1180 | ||
b0c632db | 1181 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
1182 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
1183 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
1184 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 1185 | |
3fb4c40f TH |
1186 | return 0; |
1187 | } | |
1188 | ||
1189 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) | |
1190 | { | |
24eb3a82 | 1191 | int rc = -1; |
2b29a9fd DD |
1192 | |
1193 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
1194 | vcpu->arch.sie_block->icptcode); | |
1195 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
1196 | ||
27291e21 DH |
1197 | if (guestdbg_enabled(vcpu)) |
1198 | kvm_s390_restore_guest_per_regs(vcpu); | |
1199 | ||
3fb4c40f | 1200 | if (exit_reason >= 0) { |
7c470539 | 1201 | rc = 0; |
210b1607 TH |
1202 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
1203 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
1204 | vcpu->run->s390_ucontrol.trans_exc_code = | |
1205 | current->thread.gmap_addr; | |
1206 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
1207 | rc = -EREMOTE; | |
24eb3a82 DD |
1208 | |
1209 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 1210 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 1211 | current->thread.gmap_pfault = 0; |
fa576c58 | 1212 | if (kvm_arch_setup_async_pf(vcpu)) { |
24eb3a82 | 1213 | rc = 0; |
fa576c58 TH |
1214 | } else { |
1215 | gpa_t gpa = current->thread.gmap_addr; | |
1216 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); | |
1217 | } | |
24eb3a82 DD |
1218 | } |
1219 | ||
1220 | if (rc == -1) { | |
699bde3b CB |
1221 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
1222 | trace_kvm_s390_sie_fault(vcpu); | |
1223 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
1f0d0f09 | 1224 | } |
b0c632db | 1225 | |
5a32c1af | 1226 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 1227 | |
a76ccff6 TH |
1228 | if (rc == 0) { |
1229 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
1230 | /* Don't exit for host interrupts. */ |
1231 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
1232 | else |
1233 | rc = kvm_handle_sie_intercept(vcpu); | |
1234 | } | |
1235 | ||
3fb4c40f TH |
1236 | return rc; |
1237 | } | |
1238 | ||
1239 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
1240 | { | |
1241 | int rc, exit_reason; | |
1242 | ||
800c1065 TH |
1243 | /* |
1244 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
1245 | * ning the guest), so that memslots (and other stuff) are protected | |
1246 | */ | |
1247 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
1248 | ||
a76ccff6 TH |
1249 | do { |
1250 | rc = vcpu_pre_run(vcpu); | |
1251 | if (rc) | |
1252 | break; | |
3fb4c40f | 1253 | |
800c1065 | 1254 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
1255 | /* |
1256 | * As PF_VCPU will be used in fault handler, between | |
1257 | * guest_enter and guest_exit should be no uaccess. | |
1258 | */ | |
1259 | preempt_disable(); | |
1260 | kvm_guest_enter(); | |
1261 | preempt_enable(); | |
1262 | exit_reason = sie64a(vcpu->arch.sie_block, | |
1263 | vcpu->run->s.regs.gprs); | |
1264 | kvm_guest_exit(); | |
800c1065 | 1265 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
1266 | |
1267 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 1268 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 1269 | |
800c1065 | 1270 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 1271 | return rc; |
b0c632db HC |
1272 | } |
1273 | ||
1274 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
1275 | { | |
8f2abe6a | 1276 | int rc; |
b0c632db HC |
1277 | sigset_t sigsaved; |
1278 | ||
27291e21 DH |
1279 | if (guestdbg_exit_pending(vcpu)) { |
1280 | kvm_s390_prepare_debug_exit(vcpu); | |
1281 | return 0; | |
1282 | } | |
1283 | ||
b0c632db HC |
1284 | if (vcpu->sigset_active) |
1285 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1286 | ||
6852d7b6 | 1287 | kvm_s390_vcpu_start(vcpu); |
b0c632db | 1288 | |
8f2abe6a CB |
1289 | switch (kvm_run->exit_reason) { |
1290 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 1291 | case KVM_EXIT_UNKNOWN: |
9ace903d | 1292 | case KVM_EXIT_INTR: |
8f2abe6a | 1293 | case KVM_EXIT_S390_RESET: |
e168bf8d | 1294 | case KVM_EXIT_S390_UCONTROL: |
fa6b7fe9 | 1295 | case KVM_EXIT_S390_TSCH: |
27291e21 | 1296 | case KVM_EXIT_DEBUG: |
8f2abe6a CB |
1297 | break; |
1298 | default: | |
1299 | BUG(); | |
1300 | } | |
1301 | ||
d7b0b5eb CO |
1302 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
1303 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
60b413c9 CB |
1304 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
1305 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; | |
1306 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
1307 | } | |
9eed0735 CB |
1308 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
1309 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; | |
1310 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
1311 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
1312 | } | |
d7b0b5eb | 1313 | |
dab4079d | 1314 | might_fault(); |
a76ccff6 | 1315 | rc = __vcpu_run(vcpu); |
9ace903d | 1316 | |
b1d16c49 CE |
1317 | if (signal_pending(current) && !rc) { |
1318 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 1319 | rc = -EINTR; |
b1d16c49 | 1320 | } |
8f2abe6a | 1321 | |
27291e21 DH |
1322 | if (guestdbg_exit_pending(vcpu) && !rc) { |
1323 | kvm_s390_prepare_debug_exit(vcpu); | |
1324 | rc = 0; | |
1325 | } | |
1326 | ||
b8e660b8 | 1327 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
1328 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
1329 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
1330 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
1331 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
1332 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
1333 | rc = 0; | |
1334 | } | |
1335 | ||
1336 | if (rc == -EREMOTE) { | |
1337 | /* intercept was handled, but userspace support is needed | |
1338 | * kvm_run has been prepared by the handler */ | |
1339 | rc = 0; | |
1340 | } | |
b0c632db | 1341 | |
d7b0b5eb CO |
1342 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
1343 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
fda902cb | 1344 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); |
9eed0735 | 1345 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
d7b0b5eb | 1346 | |
b0c632db HC |
1347 | if (vcpu->sigset_active) |
1348 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1349 | ||
b0c632db | 1350 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 1351 | return rc; |
b0c632db HC |
1352 | } |
1353 | ||
b0c632db HC |
1354 | /* |
1355 | * store status at address | |
1356 | * we use have two special cases: | |
1357 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
1358 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
1359 | */ | |
d0bce605 | 1360 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 1361 | { |
092670cd | 1362 | unsigned char archmode = 1; |
fda902cb | 1363 | unsigned int px; |
178bd789 | 1364 | u64 clkcomp; |
d0bce605 | 1365 | int rc; |
b0c632db | 1366 | |
d0bce605 HC |
1367 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
1368 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 1369 | return -EFAULT; |
d0bce605 HC |
1370 | gpa = SAVE_AREA_BASE; |
1371 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { | |
1372 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 1373 | return -EFAULT; |
d0bce605 HC |
1374 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
1375 | } | |
1376 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), | |
1377 | vcpu->arch.guest_fpregs.fprs, 128); | |
1378 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), | |
1379 | vcpu->run->s.regs.gprs, 128); | |
1380 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), | |
1381 | &vcpu->arch.sie_block->gpsw, 16); | |
fda902cb | 1382 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 | 1383 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
fda902cb | 1384 | &px, 4); |
d0bce605 HC |
1385 | rc |= write_guest_abs(vcpu, |
1386 | gpa + offsetof(struct save_area, fp_ctrl_reg), | |
1387 | &vcpu->arch.guest_fpregs.fpc, 4); | |
1388 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), | |
1389 | &vcpu->arch.sie_block->todpr, 4); | |
1390 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), | |
1391 | &vcpu->arch.sie_block->cputm, 8); | |
178bd789 | 1392 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d0bce605 HC |
1393 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
1394 | &clkcomp, 8); | |
1395 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), | |
1396 | &vcpu->run->s.regs.acrs, 64); | |
1397 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), | |
1398 | &vcpu->arch.sie_block->gcr, 128); | |
1399 | return rc ? -EFAULT : 0; | |
b0c632db HC |
1400 | } |
1401 | ||
e879892c TH |
1402 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
1403 | { | |
1404 | /* | |
1405 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
1406 | * copying in vcpu load/put. Lets update our copies before we save | |
1407 | * it into the save area | |
1408 | */ | |
1409 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1410 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1411 | save_access_regs(vcpu->run->s.regs.acrs); | |
1412 | ||
1413 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
1414 | } | |
1415 | ||
8ad35755 DH |
1416 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
1417 | { | |
1418 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
1419 | kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu); | |
1420 | exit_sie_sync(vcpu); | |
1421 | } | |
1422 | ||
1423 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
1424 | { | |
1425 | unsigned int i; | |
1426 | struct kvm_vcpu *vcpu; | |
1427 | ||
1428 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1429 | __disable_ibs_on_vcpu(vcpu); | |
1430 | } | |
1431 | } | |
1432 | ||
1433 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
1434 | { | |
1435 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
1436 | kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu); | |
1437 | exit_sie_sync(vcpu); | |
1438 | } | |
1439 | ||
6852d7b6 DH |
1440 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
1441 | { | |
8ad35755 DH |
1442 | int i, online_vcpus, started_vcpus = 0; |
1443 | ||
1444 | if (!is_vcpu_stopped(vcpu)) | |
1445 | return; | |
1446 | ||
6852d7b6 | 1447 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 DH |
1448 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
1449 | spin_lock_bh(&vcpu->kvm->arch.start_stop_lock); | |
1450 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); | |
1451 | ||
1452 | for (i = 0; i < online_vcpus; i++) { | |
1453 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
1454 | started_vcpus++; | |
1455 | } | |
1456 | ||
1457 | if (started_vcpus == 0) { | |
1458 | /* we're the only active VCPU -> speed it up */ | |
1459 | __enable_ibs_on_vcpu(vcpu); | |
1460 | } else if (started_vcpus == 1) { | |
1461 | /* | |
1462 | * As we are starting a second VCPU, we have to disable | |
1463 | * the IBS facility on all VCPUs to remove potentially | |
1464 | * oustanding ENABLE requests. | |
1465 | */ | |
1466 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
1467 | } | |
1468 | ||
6852d7b6 | 1469 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
1470 | /* |
1471 | * Another VCPU might have used IBS while we were offline. | |
1472 | * Let's play safe and flush the VCPU at startup. | |
1473 | */ | |
1474 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
1475 | spin_unlock_bh(&vcpu->kvm->arch.start_stop_lock); | |
1476 | return; | |
6852d7b6 DH |
1477 | } |
1478 | ||
1479 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
1480 | { | |
8ad35755 DH |
1481 | int i, online_vcpus, started_vcpus = 0; |
1482 | struct kvm_vcpu *started_vcpu = NULL; | |
1483 | ||
1484 | if (is_vcpu_stopped(vcpu)) | |
1485 | return; | |
1486 | ||
6852d7b6 | 1487 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 DH |
1488 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
1489 | spin_lock_bh(&vcpu->kvm->arch.start_stop_lock); | |
1490 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); | |
1491 | ||
32f5ff63 DH |
1492 | /* Need to lock access to action_bits to avoid a SIGP race condition */ |
1493 | spin_lock_bh(&vcpu->arch.local_int.lock); | |
6852d7b6 | 1494 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
32f5ff63 DH |
1495 | |
1496 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ | |
1497 | vcpu->arch.local_int.action_bits &= | |
1498 | ~(ACTION_STOP_ON_STOP | ACTION_STORE_ON_STOP); | |
1499 | spin_unlock_bh(&vcpu->arch.local_int.lock); | |
1500 | ||
8ad35755 DH |
1501 | __disable_ibs_on_vcpu(vcpu); |
1502 | ||
1503 | for (i = 0; i < online_vcpus; i++) { | |
1504 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
1505 | started_vcpus++; | |
1506 | started_vcpu = vcpu->kvm->vcpus[i]; | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | if (started_vcpus == 1) { | |
1511 | /* | |
1512 | * As we only have one VCPU left, we want to enable the | |
1513 | * IBS facility for that VCPU to speed it up. | |
1514 | */ | |
1515 | __enable_ibs_on_vcpu(started_vcpu); | |
1516 | } | |
1517 | ||
1518 | spin_unlock_bh(&vcpu->kvm->arch.start_stop_lock); | |
1519 | return; | |
6852d7b6 DH |
1520 | } |
1521 | ||
d6712df9 CH |
1522 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
1523 | struct kvm_enable_cap *cap) | |
1524 | { | |
1525 | int r; | |
1526 | ||
1527 | if (cap->flags) | |
1528 | return -EINVAL; | |
1529 | ||
1530 | switch (cap->cap) { | |
fa6b7fe9 CH |
1531 | case KVM_CAP_S390_CSS_SUPPORT: |
1532 | if (!vcpu->kvm->arch.css_support) { | |
1533 | vcpu->kvm->arch.css_support = 1; | |
1534 | trace_kvm_s390_enable_css(vcpu->kvm); | |
1535 | } | |
1536 | r = 0; | |
1537 | break; | |
d6712df9 CH |
1538 | default: |
1539 | r = -EINVAL; | |
1540 | break; | |
1541 | } | |
1542 | return r; | |
1543 | } | |
1544 | ||
b0c632db HC |
1545 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1546 | unsigned int ioctl, unsigned long arg) | |
1547 | { | |
1548 | struct kvm_vcpu *vcpu = filp->private_data; | |
1549 | void __user *argp = (void __user *)arg; | |
800c1065 | 1550 | int idx; |
bc923cc9 | 1551 | long r; |
b0c632db | 1552 | |
93736624 AK |
1553 | switch (ioctl) { |
1554 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
1555 | struct kvm_s390_interrupt s390int; |
1556 | ||
93736624 | 1557 | r = -EFAULT; |
ba5c1e9b | 1558 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
1559 | break; |
1560 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
1561 | break; | |
ba5c1e9b | 1562 | } |
b0c632db | 1563 | case KVM_S390_STORE_STATUS: |
800c1065 | 1564 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 1565 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 1566 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 1567 | break; |
b0c632db HC |
1568 | case KVM_S390_SET_INITIAL_PSW: { |
1569 | psw_t psw; | |
1570 | ||
bc923cc9 | 1571 | r = -EFAULT; |
b0c632db | 1572 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
1573 | break; |
1574 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
1575 | break; | |
b0c632db HC |
1576 | } |
1577 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
1578 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
1579 | break; | |
14eebd91 CO |
1580 | case KVM_SET_ONE_REG: |
1581 | case KVM_GET_ONE_REG: { | |
1582 | struct kvm_one_reg reg; | |
1583 | r = -EFAULT; | |
1584 | if (copy_from_user(®, argp, sizeof(reg))) | |
1585 | break; | |
1586 | if (ioctl == KVM_SET_ONE_REG) | |
1587 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
1588 | else | |
1589 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
1590 | break; | |
1591 | } | |
27e0393f CO |
1592 | #ifdef CONFIG_KVM_S390_UCONTROL |
1593 | case KVM_S390_UCAS_MAP: { | |
1594 | struct kvm_s390_ucas_mapping ucasmap; | |
1595 | ||
1596 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1597 | r = -EFAULT; | |
1598 | break; | |
1599 | } | |
1600 | ||
1601 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1602 | r = -EINVAL; | |
1603 | break; | |
1604 | } | |
1605 | ||
1606 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
1607 | ucasmap.vcpu_addr, ucasmap.length); | |
1608 | break; | |
1609 | } | |
1610 | case KVM_S390_UCAS_UNMAP: { | |
1611 | struct kvm_s390_ucas_mapping ucasmap; | |
1612 | ||
1613 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1614 | r = -EFAULT; | |
1615 | break; | |
1616 | } | |
1617 | ||
1618 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1619 | r = -EINVAL; | |
1620 | break; | |
1621 | } | |
1622 | ||
1623 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
1624 | ucasmap.length); | |
1625 | break; | |
1626 | } | |
1627 | #endif | |
ccc7910f CO |
1628 | case KVM_S390_VCPU_FAULT: { |
1629 | r = gmap_fault(arg, vcpu->arch.gmap); | |
1630 | if (!IS_ERR_VALUE(r)) | |
1631 | r = 0; | |
1632 | break; | |
1633 | } | |
d6712df9 CH |
1634 | case KVM_ENABLE_CAP: |
1635 | { | |
1636 | struct kvm_enable_cap cap; | |
1637 | r = -EFAULT; | |
1638 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1639 | break; | |
1640 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
1641 | break; | |
1642 | } | |
b0c632db | 1643 | default: |
3e6afcf1 | 1644 | r = -ENOTTY; |
b0c632db | 1645 | } |
bc923cc9 | 1646 | return r; |
b0c632db HC |
1647 | } |
1648 | ||
5b1c1493 CO |
1649 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
1650 | { | |
1651 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1652 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
1653 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
1654 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
1655 | get_page(vmf->page); | |
1656 | return 0; | |
1657 | } | |
1658 | #endif | |
1659 | return VM_FAULT_SIGBUS; | |
1660 | } | |
1661 | ||
5587027c | 1662 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
1663 | struct kvm_memory_slot *dont) |
1664 | { | |
1665 | } | |
1666 | ||
5587027c AK |
1667 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
1668 | unsigned long npages) | |
db3fe4eb TY |
1669 | { |
1670 | return 0; | |
1671 | } | |
1672 | ||
e59dbe09 TY |
1673 | void kvm_arch_memslots_updated(struct kvm *kvm) |
1674 | { | |
1675 | } | |
1676 | ||
b0c632db | 1677 | /* Section: memory related */ |
f7784b8e MT |
1678 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
1679 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
1680 | struct kvm_userspace_memory_region *mem, |
1681 | enum kvm_mr_change change) | |
b0c632db | 1682 | { |
dd2887e7 NW |
1683 | /* A few sanity checks. We can have memory slots which have to be |
1684 | located/ended at a segment boundary (1MB). The memory in userland is | |
1685 | ok to be fragmented into various different vmas. It is okay to mmap() | |
1686 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 1687 | |
598841ca | 1688 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
1689 | return -EINVAL; |
1690 | ||
598841ca | 1691 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
1692 | return -EINVAL; |
1693 | ||
f7784b8e MT |
1694 | return 0; |
1695 | } | |
1696 | ||
1697 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
1698 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
1699 | const struct kvm_memory_slot *old, |
1700 | enum kvm_mr_change change) | |
f7784b8e | 1701 | { |
f7850c92 | 1702 | int rc; |
f7784b8e | 1703 | |
2cef4deb CB |
1704 | /* If the basics of the memslot do not change, we do not want |
1705 | * to update the gmap. Every update causes several unnecessary | |
1706 | * segment translation exceptions. This is usually handled just | |
1707 | * fine by the normal fault handler + gmap, but it will also | |
1708 | * cause faults on the prefix page of running guest CPUs. | |
1709 | */ | |
1710 | if (old->userspace_addr == mem->userspace_addr && | |
1711 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
1712 | old->npages * PAGE_SIZE == mem->memory_size) | |
1713 | return; | |
598841ca CO |
1714 | |
1715 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
1716 | mem->guest_phys_addr, mem->memory_size); | |
1717 | if (rc) | |
f7850c92 | 1718 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 1719 | return; |
b0c632db HC |
1720 | } |
1721 | ||
2df72e9b MT |
1722 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
1723 | { | |
1724 | } | |
1725 | ||
1726 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, | |
1727 | struct kvm_memory_slot *slot) | |
34d4cb8f MT |
1728 | { |
1729 | } | |
1730 | ||
b0c632db HC |
1731 | static int __init kvm_s390_init(void) |
1732 | { | |
ef50f7ac | 1733 | int ret; |
0ee75bea | 1734 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
1735 | if (ret) |
1736 | return ret; | |
1737 | ||
1738 | /* | |
1739 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 1740 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
1741 | * only set facilities that are known to work in KVM. |
1742 | */ | |
78c4b59f MM |
1743 | vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
1744 | if (!vfacilities) { | |
ef50f7ac CB |
1745 | kvm_exit(); |
1746 | return -ENOMEM; | |
1747 | } | |
78c4b59f | 1748 | memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); |
d208c79d | 1749 | vfacilities[0] &= 0xff82fff3f4fc2000UL; |
7feb6bb8 | 1750 | vfacilities[1] &= 0x005c000000000000UL; |
ef50f7ac | 1751 | return 0; |
b0c632db HC |
1752 | } |
1753 | ||
1754 | static void __exit kvm_s390_exit(void) | |
1755 | { | |
78c4b59f | 1756 | free_page((unsigned long) vfacilities); |
b0c632db HC |
1757 | kvm_exit(); |
1758 | } | |
1759 | ||
1760 | module_init(kvm_s390_init); | |
1761 | module_exit(kvm_s390_exit); | |
566af940 CH |
1762 | |
1763 | /* | |
1764 | * Enable autoloading of the kvm module. | |
1765 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
1766 | * since x86 takes a different approach. | |
1767 | */ | |
1768 | #include <linux/miscdevice.h> | |
1769 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
1770 | MODULE_ALIAS("devname:kvm"); |