Commit | Line | Data |
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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) }, | |
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 | 83 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
84 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
85 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 86 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
87 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
88 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
5288fbf0 CB |
89 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
90 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
91 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
92 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
93 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
94 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 95 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 96 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 97 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
98 | { NULL } |
99 | }; | |
100 | ||
78c4b59f | 101 | unsigned long *vfacilities; |
2c70fe44 | 102 | static struct gmap_notifier gmap_notifier; |
b0c632db | 103 | |
78c4b59f | 104 | /* test availability of vfacility */ |
280ef0f1 | 105 | int test_vfacility(unsigned long nr) |
78c4b59f MM |
106 | { |
107 | return __test_facility(nr, (void *) vfacilities); | |
108 | } | |
109 | ||
b0c632db | 110 | /* Section: not file related */ |
13a34e06 | 111 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
112 | { |
113 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 114 | return 0; |
b0c632db HC |
115 | } |
116 | ||
2c70fe44 CB |
117 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
118 | ||
b0c632db HC |
119 | int kvm_arch_hardware_setup(void) |
120 | { | |
2c70fe44 CB |
121 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
122 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
123 | return 0; |
124 | } | |
125 | ||
126 | void kvm_arch_hardware_unsetup(void) | |
127 | { | |
2c70fe44 | 128 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
129 | } |
130 | ||
b0c632db HC |
131 | int kvm_arch_init(void *opaque) |
132 | { | |
84877d93 CH |
133 | /* Register floating interrupt controller interface. */ |
134 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
135 | } |
136 | ||
b0c632db HC |
137 | /* Section: device related */ |
138 | long kvm_arch_dev_ioctl(struct file *filp, | |
139 | unsigned int ioctl, unsigned long arg) | |
140 | { | |
141 | if (ioctl == KVM_S390_ENABLE_SIE) | |
142 | return s390_enable_sie(); | |
143 | return -EINVAL; | |
144 | } | |
145 | ||
784aa3d7 | 146 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 147 | { |
d7b0b5eb CO |
148 | int r; |
149 | ||
2bd0ac4e | 150 | switch (ext) { |
d7b0b5eb | 151 | case KVM_CAP_S390_PSW: |
b6cf8788 | 152 | case KVM_CAP_S390_GMAP: |
52e16b18 | 153 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
154 | #ifdef CONFIG_KVM_S390_UCONTROL |
155 | case KVM_CAP_S390_UCONTROL: | |
156 | #endif | |
3c038e6b | 157 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 158 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 159 | case KVM_CAP_ONE_REG: |
d6712df9 | 160 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 161 | case KVM_CAP_S390_CSS_SUPPORT: |
ebc32262 | 162 | case KVM_CAP_IRQFD: |
10ccaa1e | 163 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 164 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 165 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 166 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 167 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 168 | case KVM_CAP_MP_STATE: |
d7b0b5eb CO |
169 | r = 1; |
170 | break; | |
e726b1bd CB |
171 | case KVM_CAP_NR_VCPUS: |
172 | case KVM_CAP_MAX_VCPUS: | |
173 | r = KVM_MAX_VCPUS; | |
174 | break; | |
e1e2e605 NW |
175 | case KVM_CAP_NR_MEMSLOTS: |
176 | r = KVM_USER_MEM_SLOTS; | |
177 | break; | |
1526bf9c | 178 | case KVM_CAP_S390_COW: |
abf09bed | 179 | r = MACHINE_HAS_ESOP; |
1526bf9c | 180 | break; |
2bd0ac4e | 181 | default: |
d7b0b5eb | 182 | r = 0; |
2bd0ac4e | 183 | } |
d7b0b5eb | 184 | return r; |
b0c632db HC |
185 | } |
186 | ||
15f36ebd JH |
187 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
188 | struct kvm_memory_slot *memslot) | |
189 | { | |
190 | gfn_t cur_gfn, last_gfn; | |
191 | unsigned long address; | |
192 | struct gmap *gmap = kvm->arch.gmap; | |
193 | ||
194 | down_read(&gmap->mm->mmap_sem); | |
195 | /* Loop over all guest pages */ | |
196 | last_gfn = memslot->base_gfn + memslot->npages; | |
197 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
198 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
199 | ||
200 | if (gmap_test_and_clear_dirty(address, gmap)) | |
201 | mark_page_dirty(kvm, cur_gfn); | |
202 | } | |
203 | up_read(&gmap->mm->mmap_sem); | |
204 | } | |
205 | ||
b0c632db HC |
206 | /* Section: vm related */ |
207 | /* | |
208 | * Get (and clear) the dirty memory log for a memory slot. | |
209 | */ | |
210 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
211 | struct kvm_dirty_log *log) | |
212 | { | |
15f36ebd JH |
213 | int r; |
214 | unsigned long n; | |
215 | struct kvm_memory_slot *memslot; | |
216 | int is_dirty = 0; | |
217 | ||
218 | mutex_lock(&kvm->slots_lock); | |
219 | ||
220 | r = -EINVAL; | |
221 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
222 | goto out; | |
223 | ||
224 | memslot = id_to_memslot(kvm->memslots, log->slot); | |
225 | r = -ENOENT; | |
226 | if (!memslot->dirty_bitmap) | |
227 | goto out; | |
228 | ||
229 | kvm_s390_sync_dirty_log(kvm, memslot); | |
230 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
231 | if (r) | |
232 | goto out; | |
233 | ||
234 | /* Clear the dirty log */ | |
235 | if (is_dirty) { | |
236 | n = kvm_dirty_bitmap_bytes(memslot); | |
237 | memset(memslot->dirty_bitmap, 0, n); | |
238 | } | |
239 | r = 0; | |
240 | out: | |
241 | mutex_unlock(&kvm->slots_lock); | |
242 | return r; | |
b0c632db HC |
243 | } |
244 | ||
d938dc55 CH |
245 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
246 | { | |
247 | int r; | |
248 | ||
249 | if (cap->flags) | |
250 | return -EINVAL; | |
251 | ||
252 | switch (cap->cap) { | |
84223598 CH |
253 | case KVM_CAP_S390_IRQCHIP: |
254 | kvm->arch.use_irqchip = 1; | |
255 | r = 0; | |
256 | break; | |
d938dc55 CH |
257 | default: |
258 | r = -EINVAL; | |
259 | break; | |
260 | } | |
261 | return r; | |
262 | } | |
263 | ||
8c0a7ce6 DD |
264 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
265 | { | |
266 | int ret; | |
267 | ||
268 | switch (attr->attr) { | |
269 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
270 | ret = 0; | |
271 | if (put_user(kvm->arch.gmap->asce_end, (u64 __user *)attr->addr)) | |
272 | ret = -EFAULT; | |
273 | break; | |
274 | default: | |
275 | ret = -ENXIO; | |
276 | break; | |
277 | } | |
278 | return ret; | |
279 | } | |
280 | ||
281 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
282 | { |
283 | int ret; | |
284 | unsigned int idx; | |
285 | switch (attr->attr) { | |
286 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
287 | ret = -EBUSY; | |
288 | mutex_lock(&kvm->lock); | |
289 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
290 | kvm->arch.use_cmma = 1; | |
291 | ret = 0; | |
292 | } | |
293 | mutex_unlock(&kvm->lock); | |
294 | break; | |
295 | case KVM_S390_VM_MEM_CLR_CMMA: | |
296 | mutex_lock(&kvm->lock); | |
297 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 298 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
299 | srcu_read_unlock(&kvm->srcu, idx); |
300 | mutex_unlock(&kvm->lock); | |
301 | ret = 0; | |
302 | break; | |
8c0a7ce6 DD |
303 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
304 | unsigned long new_limit; | |
305 | ||
306 | if (kvm_is_ucontrol(kvm)) | |
307 | return -EINVAL; | |
308 | ||
309 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
310 | return -EFAULT; | |
311 | ||
312 | if (new_limit > kvm->arch.gmap->asce_end) | |
313 | return -E2BIG; | |
314 | ||
315 | ret = -EBUSY; | |
316 | mutex_lock(&kvm->lock); | |
317 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
318 | /* gmap_alloc will round the limit up */ | |
319 | struct gmap *new = gmap_alloc(current->mm, new_limit); | |
320 | ||
321 | if (!new) { | |
322 | ret = -ENOMEM; | |
323 | } else { | |
324 | gmap_free(kvm->arch.gmap); | |
325 | new->private = kvm; | |
326 | kvm->arch.gmap = new; | |
327 | ret = 0; | |
328 | } | |
329 | } | |
330 | mutex_unlock(&kvm->lock); | |
331 | break; | |
332 | } | |
4f718eab DD |
333 | default: |
334 | ret = -ENXIO; | |
335 | break; | |
336 | } | |
337 | return ret; | |
338 | } | |
339 | ||
f2061656 DD |
340 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
341 | { | |
342 | int ret; | |
343 | ||
344 | switch (attr->group) { | |
4f718eab | 345 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 346 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 347 | break; |
f2061656 DD |
348 | default: |
349 | ret = -ENXIO; | |
350 | break; | |
351 | } | |
352 | ||
353 | return ret; | |
354 | } | |
355 | ||
356 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
357 | { | |
8c0a7ce6 DD |
358 | int ret; |
359 | ||
360 | switch (attr->group) { | |
361 | case KVM_S390_VM_MEM_CTRL: | |
362 | ret = kvm_s390_get_mem_control(kvm, attr); | |
363 | break; | |
364 | default: | |
365 | ret = -ENXIO; | |
366 | break; | |
367 | } | |
368 | ||
369 | return ret; | |
f2061656 DD |
370 | } |
371 | ||
372 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
373 | { | |
374 | int ret; | |
375 | ||
376 | switch (attr->group) { | |
4f718eab DD |
377 | case KVM_S390_VM_MEM_CTRL: |
378 | switch (attr->attr) { | |
379 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
380 | case KVM_S390_VM_MEM_CLR_CMMA: | |
8c0a7ce6 | 381 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
382 | ret = 0; |
383 | break; | |
384 | default: | |
385 | ret = -ENXIO; | |
386 | break; | |
387 | } | |
388 | break; | |
f2061656 DD |
389 | default: |
390 | ret = -ENXIO; | |
391 | break; | |
392 | } | |
393 | ||
394 | return ret; | |
395 | } | |
396 | ||
b0c632db HC |
397 | long kvm_arch_vm_ioctl(struct file *filp, |
398 | unsigned int ioctl, unsigned long arg) | |
399 | { | |
400 | struct kvm *kvm = filp->private_data; | |
401 | void __user *argp = (void __user *)arg; | |
f2061656 | 402 | struct kvm_device_attr attr; |
b0c632db HC |
403 | int r; |
404 | ||
405 | switch (ioctl) { | |
ba5c1e9b CO |
406 | case KVM_S390_INTERRUPT: { |
407 | struct kvm_s390_interrupt s390int; | |
408 | ||
409 | r = -EFAULT; | |
410 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
411 | break; | |
412 | r = kvm_s390_inject_vm(kvm, &s390int); | |
413 | break; | |
414 | } | |
d938dc55 CH |
415 | case KVM_ENABLE_CAP: { |
416 | struct kvm_enable_cap cap; | |
417 | r = -EFAULT; | |
418 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
419 | break; | |
420 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
421 | break; | |
422 | } | |
84223598 CH |
423 | case KVM_CREATE_IRQCHIP: { |
424 | struct kvm_irq_routing_entry routing; | |
425 | ||
426 | r = -EINVAL; | |
427 | if (kvm->arch.use_irqchip) { | |
428 | /* Set up dummy routing. */ | |
429 | memset(&routing, 0, sizeof(routing)); | |
430 | kvm_set_irq_routing(kvm, &routing, 0, 0); | |
431 | r = 0; | |
432 | } | |
433 | break; | |
434 | } | |
f2061656 DD |
435 | case KVM_SET_DEVICE_ATTR: { |
436 | r = -EFAULT; | |
437 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
438 | break; | |
439 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
440 | break; | |
441 | } | |
442 | case KVM_GET_DEVICE_ATTR: { | |
443 | r = -EFAULT; | |
444 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
445 | break; | |
446 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
447 | break; | |
448 | } | |
449 | case KVM_HAS_DEVICE_ATTR: { | |
450 | r = -EFAULT; | |
451 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
452 | break; | |
453 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
454 | break; | |
455 | } | |
b0c632db | 456 | default: |
367e1319 | 457 | r = -ENOTTY; |
b0c632db HC |
458 | } |
459 | ||
460 | return r; | |
461 | } | |
462 | ||
5102ee87 TK |
463 | static int kvm_s390_crypto_init(struct kvm *kvm) |
464 | { | |
465 | if (!test_vfacility(76)) | |
466 | return 0; | |
467 | ||
468 | kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb), | |
469 | GFP_KERNEL | GFP_DMA); | |
470 | if (!kvm->arch.crypto.crycb) | |
471 | return -ENOMEM; | |
472 | ||
473 | kvm->arch.crypto.crycbd = (__u32) (unsigned long) kvm->arch.crypto.crycb | | |
474 | CRYCB_FORMAT1; | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
e08b9637 | 479 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 480 | { |
b0c632db HC |
481 | int rc; |
482 | char debug_name[16]; | |
f6c137ff | 483 | static unsigned long sca_offset; |
b0c632db | 484 | |
e08b9637 CO |
485 | rc = -EINVAL; |
486 | #ifdef CONFIG_KVM_S390_UCONTROL | |
487 | if (type & ~KVM_VM_S390_UCONTROL) | |
488 | goto out_err; | |
489 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
490 | goto out_err; | |
491 | #else | |
492 | if (type) | |
493 | goto out_err; | |
494 | #endif | |
495 | ||
b0c632db HC |
496 | rc = s390_enable_sie(); |
497 | if (rc) | |
d89f5eff | 498 | goto out_err; |
b0c632db | 499 | |
b290411a CO |
500 | rc = -ENOMEM; |
501 | ||
b0c632db HC |
502 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
503 | if (!kvm->arch.sca) | |
d89f5eff | 504 | goto out_err; |
f6c137ff CB |
505 | spin_lock(&kvm_lock); |
506 | sca_offset = (sca_offset + 16) & 0x7f0; | |
507 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); | |
508 | spin_unlock(&kvm_lock); | |
b0c632db HC |
509 | |
510 | sprintf(debug_name, "kvm-%u", current->pid); | |
511 | ||
512 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
513 | if (!kvm->arch.dbf) | |
514 | goto out_nodbf; | |
515 | ||
5102ee87 TK |
516 | if (kvm_s390_crypto_init(kvm) < 0) |
517 | goto out_crypto; | |
518 | ||
ba5c1e9b CO |
519 | spin_lock_init(&kvm->arch.float_int.lock); |
520 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
8a242234 | 521 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 522 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 523 | |
b0c632db HC |
524 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
525 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
526 | ||
e08b9637 CO |
527 | if (type & KVM_VM_S390_UCONTROL) { |
528 | kvm->arch.gmap = NULL; | |
529 | } else { | |
0349985a | 530 | kvm->arch.gmap = gmap_alloc(current->mm, (1UL << 44) - 1); |
e08b9637 CO |
531 | if (!kvm->arch.gmap) |
532 | goto out_nogmap; | |
2c70fe44 | 533 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 534 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 535 | } |
fa6b7fe9 CH |
536 | |
537 | kvm->arch.css_support = 0; | |
84223598 | 538 | kvm->arch.use_irqchip = 0; |
fa6b7fe9 | 539 | |
8ad35755 DH |
540 | spin_lock_init(&kvm->arch.start_stop_lock); |
541 | ||
d89f5eff | 542 | return 0; |
598841ca | 543 | out_nogmap: |
5102ee87 TK |
544 | kfree(kvm->arch.crypto.crycb); |
545 | out_crypto: | |
598841ca | 546 | debug_unregister(kvm->arch.dbf); |
b0c632db HC |
547 | out_nodbf: |
548 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
549 | out_err: |
550 | return rc; | |
b0c632db HC |
551 | } |
552 | ||
d329c035 CB |
553 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
554 | { | |
555 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 556 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 557 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 558 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
559 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
560 | clear_bit(63 - vcpu->vcpu_id, | |
561 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
562 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
563 | (__u64) vcpu->arch.sie_block) | |
564 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
565 | } | |
abf4a71e | 566 | smp_mb(); |
27e0393f CO |
567 | |
568 | if (kvm_is_ucontrol(vcpu->kvm)) | |
569 | gmap_free(vcpu->arch.gmap); | |
570 | ||
b31605c1 DD |
571 | if (kvm_s390_cmma_enabled(vcpu->kvm)) |
572 | kvm_s390_vcpu_unsetup_cmma(vcpu); | |
d329c035 | 573 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 574 | |
6692cef3 | 575 | kvm_vcpu_uninit(vcpu); |
b110feaf | 576 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
577 | } |
578 | ||
579 | static void kvm_free_vcpus(struct kvm *kvm) | |
580 | { | |
581 | unsigned int i; | |
988a2cae | 582 | struct kvm_vcpu *vcpu; |
d329c035 | 583 | |
988a2cae GN |
584 | kvm_for_each_vcpu(i, vcpu, kvm) |
585 | kvm_arch_vcpu_destroy(vcpu); | |
586 | ||
587 | mutex_lock(&kvm->lock); | |
588 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
589 | kvm->vcpus[i] = NULL; | |
590 | ||
591 | atomic_set(&kvm->online_vcpus, 0); | |
592 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
593 | } |
594 | ||
b0c632db HC |
595 | void kvm_arch_destroy_vm(struct kvm *kvm) |
596 | { | |
d329c035 | 597 | kvm_free_vcpus(kvm); |
b0c632db | 598 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 599 | debug_unregister(kvm->arch.dbf); |
5102ee87 | 600 | kfree(kvm->arch.crypto.crycb); |
27e0393f CO |
601 | if (!kvm_is_ucontrol(kvm)) |
602 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 603 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 604 | kvm_s390_clear_float_irqs(kvm); |
b0c632db HC |
605 | } |
606 | ||
607 | /* Section: vcpu related */ | |
dafd032a DD |
608 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
609 | { | |
610 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); | |
611 | if (!vcpu->arch.gmap) | |
612 | return -ENOMEM; | |
613 | vcpu->arch.gmap->private = vcpu->kvm; | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
b0c632db HC |
618 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
619 | { | |
3c038e6b DD |
620 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
621 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
622 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
623 | KVM_SYNC_GPRS | | |
9eed0735 | 624 | KVM_SYNC_ACRS | |
b028ee3e DH |
625 | KVM_SYNC_CRS | |
626 | KVM_SYNC_ARCH0 | | |
627 | KVM_SYNC_PFAULT; | |
dafd032a DD |
628 | |
629 | if (kvm_is_ucontrol(vcpu->kvm)) | |
630 | return __kvm_ucontrol_vcpu_init(vcpu); | |
631 | ||
b0c632db HC |
632 | return 0; |
633 | } | |
634 | ||
b0c632db HC |
635 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
636 | { | |
4725c860 MS |
637 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
638 | save_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db | 639 | save_access_regs(vcpu->arch.host_acrs); |
4725c860 MS |
640 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
641 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 642 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 643 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 644 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
645 | } |
646 | ||
647 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
648 | { | |
9e6dabef | 649 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 650 | gmap_disable(vcpu->arch.gmap); |
4725c860 MS |
651 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
652 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 653 | save_access_regs(vcpu->run->s.regs.acrs); |
4725c860 MS |
654 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
655 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db HC |
656 | restore_access_regs(vcpu->arch.host_acrs); |
657 | } | |
658 | ||
659 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
660 | { | |
661 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
662 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
663 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 664 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
665 | vcpu->arch.sie_block->cputm = 0UL; |
666 | vcpu->arch.sie_block->ckc = 0UL; | |
667 | vcpu->arch.sie_block->todpr = 0; | |
668 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
669 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
670 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
671 | vcpu->arch.guest_fpregs.fpc = 0; | |
672 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
673 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 674 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
675 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
676 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
677 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
678 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 679 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
680 | } |
681 | ||
31928aa5 | 682 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 683 | { |
dafd032a DD |
684 | if (!kvm_is_ucontrol(vcpu->kvm)) |
685 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; | |
42897d86 MT |
686 | } |
687 | ||
5102ee87 TK |
688 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
689 | { | |
690 | if (!test_vfacility(76)) | |
691 | return; | |
692 | ||
693 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; | |
694 | } | |
695 | ||
b31605c1 DD |
696 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
697 | { | |
698 | free_page(vcpu->arch.sie_block->cbrlo); | |
699 | vcpu->arch.sie_block->cbrlo = 0; | |
700 | } | |
701 | ||
702 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
703 | { | |
704 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
705 | if (!vcpu->arch.sie_block->cbrlo) | |
706 | return -ENOMEM; | |
707 | ||
708 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
709 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
710 | return 0; | |
711 | } | |
712 | ||
b0c632db HC |
713 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
714 | { | |
b31605c1 | 715 | int rc = 0; |
b31288fa | 716 | |
9e6dabef CH |
717 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
718 | CPUSTAT_SM | | |
69d0d3a3 CB |
719 | CPUSTAT_STOPPED | |
720 | CPUSTAT_GED); | |
fc34531d | 721 | vcpu->arch.sie_block->ecb = 6; |
7feb6bb8 MM |
722 | if (test_vfacility(50) && test_vfacility(73)) |
723 | vcpu->arch.sie_block->ecb |= 0x10; | |
724 | ||
69d0d3a3 | 725 | vcpu->arch.sie_block->ecb2 = 8; |
4953919f | 726 | vcpu->arch.sie_block->eca = 0xD1002000U; |
217a4406 HC |
727 | if (sclp_has_siif()) |
728 | vcpu->arch.sie_block->eca |= 1; | |
78c4b59f | 729 | vcpu->arch.sie_block->fac = (int) (long) vfacilities; |
5a5e6536 MR |
730 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE | |
731 | ICTL_TPROT; | |
732 | ||
b31605c1 DD |
733 | if (kvm_s390_cmma_enabled(vcpu->kvm)) { |
734 | rc = kvm_s390_vcpu_setup_cmma(vcpu); | |
735 | if (rc) | |
736 | return rc; | |
b31288fa | 737 | } |
0ac96caf | 738 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 739 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
453423dc | 740 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 741 | vcpu->arch.cpu_id.version = 0xff; |
5102ee87 TK |
742 | |
743 | kvm_s390_vcpu_crypto_setup(vcpu); | |
744 | ||
b31605c1 | 745 | return rc; |
b0c632db HC |
746 | } |
747 | ||
748 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
749 | unsigned int id) | |
750 | { | |
4d47555a | 751 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 752 | struct sie_page *sie_page; |
4d47555a CO |
753 | int rc = -EINVAL; |
754 | ||
755 | if (id >= KVM_MAX_VCPUS) | |
756 | goto out; | |
757 | ||
758 | rc = -ENOMEM; | |
b0c632db | 759 | |
b110feaf | 760 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 761 | if (!vcpu) |
4d47555a | 762 | goto out; |
b0c632db | 763 | |
7feb6bb8 MM |
764 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
765 | if (!sie_page) | |
b0c632db HC |
766 | goto out_free_cpu; |
767 | ||
7feb6bb8 MM |
768 | vcpu->arch.sie_block = &sie_page->sie_block; |
769 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
770 | ||
b0c632db | 771 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
772 | if (!kvm_is_ucontrol(kvm)) { |
773 | if (!kvm->arch.sca) { | |
774 | WARN_ON_ONCE(1); | |
775 | goto out_free_cpu; | |
776 | } | |
777 | if (!kvm->arch.sca->cpu[id].sda) | |
778 | kvm->arch.sca->cpu[id].sda = | |
779 | (__u64) vcpu->arch.sie_block; | |
780 | vcpu->arch.sie_block->scaoh = | |
781 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
782 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
783 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
784 | } | |
b0c632db | 785 | |
ba5c1e9b | 786 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 787 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 788 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 789 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 790 | |
b0c632db HC |
791 | rc = kvm_vcpu_init(vcpu, kvm, id); |
792 | if (rc) | |
7b06bf2f | 793 | goto out_free_sie_block; |
b0c632db HC |
794 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
795 | vcpu->arch.sie_block); | |
ade38c31 | 796 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 797 | |
b0c632db | 798 | return vcpu; |
7b06bf2f WY |
799 | out_free_sie_block: |
800 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 801 | out_free_cpu: |
b110feaf | 802 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 803 | out: |
b0c632db HC |
804 | return ERR_PTR(rc); |
805 | } | |
806 | ||
b0c632db HC |
807 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
808 | { | |
9a022067 | 809 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
810 | } |
811 | ||
49b99e1e CB |
812 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
813 | { | |
814 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
815 | } | |
816 | ||
817 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
818 | { | |
819 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
820 | } | |
821 | ||
822 | /* | |
823 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
824 | * If the CPU is not running (e.g. waiting as idle) the function will | |
825 | * return immediately. */ | |
826 | void exit_sie(struct kvm_vcpu *vcpu) | |
827 | { | |
828 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
829 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
830 | cpu_relax(); | |
831 | } | |
832 | ||
833 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
834 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
835 | { | |
836 | s390_vcpu_block(vcpu); | |
837 | exit_sie(vcpu); | |
838 | } | |
839 | ||
2c70fe44 CB |
840 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
841 | { | |
842 | int i; | |
843 | struct kvm *kvm = gmap->private; | |
844 | struct kvm_vcpu *vcpu; | |
845 | ||
846 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
847 | /* match against both prefix pages */ | |
fda902cb | 848 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 CB |
849 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
850 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
851 | exit_sie_sync(vcpu); | |
852 | } | |
853 | } | |
854 | } | |
855 | ||
b6d33834 CD |
856 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
857 | { | |
858 | /* kvm common code refers to this, but never calls it */ | |
859 | BUG(); | |
860 | return 0; | |
861 | } | |
862 | ||
14eebd91 CO |
863 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
864 | struct kvm_one_reg *reg) | |
865 | { | |
866 | int r = -EINVAL; | |
867 | ||
868 | switch (reg->id) { | |
29b7c71b CO |
869 | case KVM_REG_S390_TODPR: |
870 | r = put_user(vcpu->arch.sie_block->todpr, | |
871 | (u32 __user *)reg->addr); | |
872 | break; | |
873 | case KVM_REG_S390_EPOCHDIFF: | |
874 | r = put_user(vcpu->arch.sie_block->epoch, | |
875 | (u64 __user *)reg->addr); | |
876 | break; | |
46a6dd1c J |
877 | case KVM_REG_S390_CPU_TIMER: |
878 | r = put_user(vcpu->arch.sie_block->cputm, | |
879 | (u64 __user *)reg->addr); | |
880 | break; | |
881 | case KVM_REG_S390_CLOCK_COMP: | |
882 | r = put_user(vcpu->arch.sie_block->ckc, | |
883 | (u64 __user *)reg->addr); | |
884 | break; | |
536336c2 DD |
885 | case KVM_REG_S390_PFTOKEN: |
886 | r = put_user(vcpu->arch.pfault_token, | |
887 | (u64 __user *)reg->addr); | |
888 | break; | |
889 | case KVM_REG_S390_PFCOMPARE: | |
890 | r = put_user(vcpu->arch.pfault_compare, | |
891 | (u64 __user *)reg->addr); | |
892 | break; | |
893 | case KVM_REG_S390_PFSELECT: | |
894 | r = put_user(vcpu->arch.pfault_select, | |
895 | (u64 __user *)reg->addr); | |
896 | break; | |
672550fb CB |
897 | case KVM_REG_S390_PP: |
898 | r = put_user(vcpu->arch.sie_block->pp, | |
899 | (u64 __user *)reg->addr); | |
900 | break; | |
afa45ff5 CB |
901 | case KVM_REG_S390_GBEA: |
902 | r = put_user(vcpu->arch.sie_block->gbea, | |
903 | (u64 __user *)reg->addr); | |
904 | break; | |
14eebd91 CO |
905 | default: |
906 | break; | |
907 | } | |
908 | ||
909 | return r; | |
910 | } | |
911 | ||
912 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
913 | struct kvm_one_reg *reg) | |
914 | { | |
915 | int r = -EINVAL; | |
916 | ||
917 | switch (reg->id) { | |
29b7c71b CO |
918 | case KVM_REG_S390_TODPR: |
919 | r = get_user(vcpu->arch.sie_block->todpr, | |
920 | (u32 __user *)reg->addr); | |
921 | break; | |
922 | case KVM_REG_S390_EPOCHDIFF: | |
923 | r = get_user(vcpu->arch.sie_block->epoch, | |
924 | (u64 __user *)reg->addr); | |
925 | break; | |
46a6dd1c J |
926 | case KVM_REG_S390_CPU_TIMER: |
927 | r = get_user(vcpu->arch.sie_block->cputm, | |
928 | (u64 __user *)reg->addr); | |
929 | break; | |
930 | case KVM_REG_S390_CLOCK_COMP: | |
931 | r = get_user(vcpu->arch.sie_block->ckc, | |
932 | (u64 __user *)reg->addr); | |
933 | break; | |
536336c2 DD |
934 | case KVM_REG_S390_PFTOKEN: |
935 | r = get_user(vcpu->arch.pfault_token, | |
936 | (u64 __user *)reg->addr); | |
937 | break; | |
938 | case KVM_REG_S390_PFCOMPARE: | |
939 | r = get_user(vcpu->arch.pfault_compare, | |
940 | (u64 __user *)reg->addr); | |
941 | break; | |
942 | case KVM_REG_S390_PFSELECT: | |
943 | r = get_user(vcpu->arch.pfault_select, | |
944 | (u64 __user *)reg->addr); | |
945 | break; | |
672550fb CB |
946 | case KVM_REG_S390_PP: |
947 | r = get_user(vcpu->arch.sie_block->pp, | |
948 | (u64 __user *)reg->addr); | |
949 | break; | |
afa45ff5 CB |
950 | case KVM_REG_S390_GBEA: |
951 | r = get_user(vcpu->arch.sie_block->gbea, | |
952 | (u64 __user *)reg->addr); | |
953 | break; | |
14eebd91 CO |
954 | default: |
955 | break; | |
956 | } | |
957 | ||
958 | return r; | |
959 | } | |
b6d33834 | 960 | |
b0c632db HC |
961 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
962 | { | |
b0c632db | 963 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
964 | return 0; |
965 | } | |
966 | ||
967 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
968 | { | |
5a32c1af | 969 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
970 | return 0; |
971 | } | |
972 | ||
973 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
974 | { | |
5a32c1af | 975 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
976 | return 0; |
977 | } | |
978 | ||
979 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
980 | struct kvm_sregs *sregs) | |
981 | { | |
59674c1a | 982 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 983 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 984 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
985 | return 0; |
986 | } | |
987 | ||
988 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
989 | struct kvm_sregs *sregs) | |
990 | { | |
59674c1a | 991 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 992 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
993 | return 0; |
994 | } | |
995 | ||
996 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
997 | { | |
4725c860 MS |
998 | if (test_fp_ctl(fpu->fpc)) |
999 | return -EINVAL; | |
b0c632db | 1000 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 MS |
1001 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
1002 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1003 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
b0c632db HC |
1004 | return 0; |
1005 | } | |
1006 | ||
1007 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1008 | { | |
b0c632db HC |
1009 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
1010 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
1011 | return 0; |
1012 | } | |
1013 | ||
1014 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
1015 | { | |
1016 | int rc = 0; | |
1017 | ||
7a42fdc2 | 1018 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 1019 | rc = -EBUSY; |
d7b0b5eb CO |
1020 | else { |
1021 | vcpu->run->psw_mask = psw.mask; | |
1022 | vcpu->run->psw_addr = psw.addr; | |
1023 | } | |
b0c632db HC |
1024 | return rc; |
1025 | } | |
1026 | ||
1027 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
1028 | struct kvm_translation *tr) | |
1029 | { | |
1030 | return -EINVAL; /* not implemented yet */ | |
1031 | } | |
1032 | ||
27291e21 DH |
1033 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
1034 | KVM_GUESTDBG_USE_HW_BP | \ | |
1035 | KVM_GUESTDBG_ENABLE) | |
1036 | ||
d0bfb940 JK |
1037 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
1038 | struct kvm_guest_debug *dbg) | |
b0c632db | 1039 | { |
27291e21 DH |
1040 | int rc = 0; |
1041 | ||
1042 | vcpu->guest_debug = 0; | |
1043 | kvm_s390_clear_bp_data(vcpu); | |
1044 | ||
2de3bfc2 | 1045 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
1046 | return -EINVAL; |
1047 | ||
1048 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
1049 | vcpu->guest_debug = dbg->control; | |
1050 | /* enforce guest PER */ | |
1051 | atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1052 | ||
1053 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
1054 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
1055 | } else { | |
1056 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1057 | vcpu->arch.guestdbg.last_bp = 0; | |
1058 | } | |
1059 | ||
1060 | if (rc) { | |
1061 | vcpu->guest_debug = 0; | |
1062 | kvm_s390_clear_bp_data(vcpu); | |
1063 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1064 | } | |
1065 | ||
1066 | return rc; | |
b0c632db HC |
1067 | } |
1068 | ||
62d9f0db MT |
1069 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
1070 | struct kvm_mp_state *mp_state) | |
1071 | { | |
6352e4d2 DH |
1072 | /* CHECK_STOP and LOAD are not supported yet */ |
1073 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
1074 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
1075 | } |
1076 | ||
1077 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
1078 | struct kvm_mp_state *mp_state) | |
1079 | { | |
6352e4d2 DH |
1080 | int rc = 0; |
1081 | ||
1082 | /* user space knows about this interface - let it control the state */ | |
1083 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
1084 | ||
1085 | switch (mp_state->mp_state) { | |
1086 | case KVM_MP_STATE_STOPPED: | |
1087 | kvm_s390_vcpu_stop(vcpu); | |
1088 | break; | |
1089 | case KVM_MP_STATE_OPERATING: | |
1090 | kvm_s390_vcpu_start(vcpu); | |
1091 | break; | |
1092 | case KVM_MP_STATE_LOAD: | |
1093 | case KVM_MP_STATE_CHECK_STOP: | |
1094 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
1095 | default: | |
1096 | rc = -ENXIO; | |
1097 | } | |
1098 | ||
1099 | return rc; | |
62d9f0db MT |
1100 | } |
1101 | ||
b31605c1 DD |
1102 | bool kvm_s390_cmma_enabled(struct kvm *kvm) |
1103 | { | |
1104 | if (!MACHINE_IS_LPAR) | |
1105 | return false; | |
1106 | /* only enable for z10 and later */ | |
1107 | if (!MACHINE_HAS_EDAT1) | |
1108 | return false; | |
1109 | if (!kvm->arch.use_cmma) | |
1110 | return false; | |
1111 | return true; | |
1112 | } | |
1113 | ||
8ad35755 DH |
1114 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
1115 | { | |
1116 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
1117 | } | |
1118 | ||
2c70fe44 CB |
1119 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
1120 | { | |
8ad35755 DH |
1121 | retry: |
1122 | s390_vcpu_unblock(vcpu); | |
2c70fe44 CB |
1123 | /* |
1124 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
1125 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
1126 | * This ensures that the ipte instruction for this request has | |
1127 | * already finished. We might race against a second unmapper that | |
1128 | * wants to set the blocking bit. Lets just retry the request loop. | |
1129 | */ | |
8ad35755 | 1130 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
1131 | int rc; |
1132 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 1133 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
1134 | PAGE_SIZE * 2); |
1135 | if (rc) | |
1136 | return rc; | |
8ad35755 | 1137 | goto retry; |
2c70fe44 | 1138 | } |
8ad35755 | 1139 | |
d3d692c8 DH |
1140 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
1141 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
1142 | goto retry; | |
1143 | } | |
1144 | ||
8ad35755 DH |
1145 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
1146 | if (!ibs_enabled(vcpu)) { | |
1147 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
1148 | atomic_set_mask(CPUSTAT_IBS, | |
1149 | &vcpu->arch.sie_block->cpuflags); | |
1150 | } | |
1151 | goto retry; | |
2c70fe44 | 1152 | } |
8ad35755 DH |
1153 | |
1154 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
1155 | if (ibs_enabled(vcpu)) { | |
1156 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
1157 | atomic_clear_mask(CPUSTAT_IBS, | |
1158 | &vcpu->arch.sie_block->cpuflags); | |
1159 | } | |
1160 | goto retry; | |
1161 | } | |
1162 | ||
0759d068 DH |
1163 | /* nothing to do, just clear the request */ |
1164 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
1165 | ||
2c70fe44 CB |
1166 | return 0; |
1167 | } | |
1168 | ||
fa576c58 TH |
1169 | /** |
1170 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
1171 | * @vcpu: The corresponding virtual cpu | |
1172 | * @gpa: Guest physical address | |
1173 | * @writable: Whether the page should be writable or not | |
1174 | * | |
1175 | * Make sure that a guest page has been faulted-in on the host. | |
1176 | * | |
1177 | * Return: Zero on success, negative error code otherwise. | |
1178 | */ | |
1179 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 1180 | { |
527e30b4 MS |
1181 | return gmap_fault(vcpu->arch.gmap, gpa, |
1182 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
1183 | } |
1184 | ||
3c038e6b DD |
1185 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
1186 | unsigned long token) | |
1187 | { | |
1188 | struct kvm_s390_interrupt inti; | |
383d0b05 | 1189 | struct kvm_s390_irq irq; |
3c038e6b DD |
1190 | |
1191 | if (start_token) { | |
383d0b05 JF |
1192 | irq.u.ext.ext_params2 = token; |
1193 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
1194 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
1195 | } else { |
1196 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 1197 | inti.parm64 = token; |
3c038e6b DD |
1198 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
1199 | } | |
1200 | } | |
1201 | ||
1202 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
1203 | struct kvm_async_pf *work) | |
1204 | { | |
1205 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
1206 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
1207 | } | |
1208 | ||
1209 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
1210 | struct kvm_async_pf *work) | |
1211 | { | |
1212 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
1213 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
1214 | } | |
1215 | ||
1216 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
1217 | struct kvm_async_pf *work) | |
1218 | { | |
1219 | /* s390 will always inject the page directly */ | |
1220 | } | |
1221 | ||
1222 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
1223 | { | |
1224 | /* | |
1225 | * s390 will always inject the page directly, | |
1226 | * but we still want check_async_completion to cleanup | |
1227 | */ | |
1228 | return true; | |
1229 | } | |
1230 | ||
1231 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
1232 | { | |
1233 | hva_t hva; | |
1234 | struct kvm_arch_async_pf arch; | |
1235 | int rc; | |
1236 | ||
1237 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
1238 | return 0; | |
1239 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
1240 | vcpu->arch.pfault_compare) | |
1241 | return 0; | |
1242 | if (psw_extint_disabled(vcpu)) | |
1243 | return 0; | |
9a022067 | 1244 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
1245 | return 0; |
1246 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
1247 | return 0; | |
1248 | if (!vcpu->arch.gmap->pfault_enabled) | |
1249 | return 0; | |
1250 | ||
81480cc1 HC |
1251 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
1252 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
1253 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
1254 | return 0; |
1255 | ||
1256 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
1257 | return rc; | |
1258 | } | |
1259 | ||
3fb4c40f | 1260 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 1261 | { |
3fb4c40f | 1262 | int rc, cpuflags; |
e168bf8d | 1263 | |
3c038e6b DD |
1264 | /* |
1265 | * On s390 notifications for arriving pages will be delivered directly | |
1266 | * to the guest but the house keeping for completed pfaults is | |
1267 | * handled outside the worker. | |
1268 | */ | |
1269 | kvm_check_async_pf_completion(vcpu); | |
1270 | ||
5a32c1af | 1271 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
1272 | |
1273 | if (need_resched()) | |
1274 | schedule(); | |
1275 | ||
d3a73acb | 1276 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
1277 | s390_handle_mcck(); |
1278 | ||
79395031 JF |
1279 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
1280 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
1281 | if (rc) | |
1282 | return rc; | |
1283 | } | |
0ff31867 | 1284 | |
2c70fe44 CB |
1285 | rc = kvm_s390_handle_requests(vcpu); |
1286 | if (rc) | |
1287 | return rc; | |
1288 | ||
27291e21 DH |
1289 | if (guestdbg_enabled(vcpu)) { |
1290 | kvm_s390_backup_guest_per_regs(vcpu); | |
1291 | kvm_s390_patch_guest_per_regs(vcpu); | |
1292 | } | |
1293 | ||
b0c632db | 1294 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
1295 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
1296 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
1297 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 1298 | |
3fb4c40f TH |
1299 | return 0; |
1300 | } | |
1301 | ||
1302 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) | |
1303 | { | |
24eb3a82 | 1304 | int rc = -1; |
2b29a9fd DD |
1305 | |
1306 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
1307 | vcpu->arch.sie_block->icptcode); | |
1308 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
1309 | ||
27291e21 DH |
1310 | if (guestdbg_enabled(vcpu)) |
1311 | kvm_s390_restore_guest_per_regs(vcpu); | |
1312 | ||
3fb4c40f | 1313 | if (exit_reason >= 0) { |
7c470539 | 1314 | rc = 0; |
210b1607 TH |
1315 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
1316 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
1317 | vcpu->run->s390_ucontrol.trans_exc_code = | |
1318 | current->thread.gmap_addr; | |
1319 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
1320 | rc = -EREMOTE; | |
24eb3a82 DD |
1321 | |
1322 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 1323 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 1324 | current->thread.gmap_pfault = 0; |
fa576c58 | 1325 | if (kvm_arch_setup_async_pf(vcpu)) { |
24eb3a82 | 1326 | rc = 0; |
fa576c58 TH |
1327 | } else { |
1328 | gpa_t gpa = current->thread.gmap_addr; | |
1329 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); | |
1330 | } | |
24eb3a82 DD |
1331 | } |
1332 | ||
1333 | if (rc == -1) { | |
699bde3b CB |
1334 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
1335 | trace_kvm_s390_sie_fault(vcpu); | |
1336 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
1f0d0f09 | 1337 | } |
b0c632db | 1338 | |
5a32c1af | 1339 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 1340 | |
a76ccff6 TH |
1341 | if (rc == 0) { |
1342 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
1343 | /* Don't exit for host interrupts. */ |
1344 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
1345 | else |
1346 | rc = kvm_handle_sie_intercept(vcpu); | |
1347 | } | |
1348 | ||
3fb4c40f TH |
1349 | return rc; |
1350 | } | |
1351 | ||
1352 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
1353 | { | |
1354 | int rc, exit_reason; | |
1355 | ||
800c1065 TH |
1356 | /* |
1357 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
1358 | * ning the guest), so that memslots (and other stuff) are protected | |
1359 | */ | |
1360 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
1361 | ||
a76ccff6 TH |
1362 | do { |
1363 | rc = vcpu_pre_run(vcpu); | |
1364 | if (rc) | |
1365 | break; | |
3fb4c40f | 1366 | |
800c1065 | 1367 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
1368 | /* |
1369 | * As PF_VCPU will be used in fault handler, between | |
1370 | * guest_enter and guest_exit should be no uaccess. | |
1371 | */ | |
1372 | preempt_disable(); | |
1373 | kvm_guest_enter(); | |
1374 | preempt_enable(); | |
1375 | exit_reason = sie64a(vcpu->arch.sie_block, | |
1376 | vcpu->run->s.regs.gprs); | |
1377 | kvm_guest_exit(); | |
800c1065 | 1378 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
1379 | |
1380 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 1381 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 1382 | |
800c1065 | 1383 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 1384 | return rc; |
b0c632db HC |
1385 | } |
1386 | ||
b028ee3e DH |
1387 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
1388 | { | |
1389 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
1390 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
1391 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
1392 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
1393 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
1394 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
1395 | /* some control register changes require a tlb flush */ |
1396 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
1397 | } |
1398 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
1399 | vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; | |
1400 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; | |
1401 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
1402 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
1403 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
1404 | } | |
1405 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
1406 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
1407 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
1408 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
1409 | } | |
1410 | kvm_run->kvm_dirty_regs = 0; | |
1411 | } | |
1412 | ||
1413 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
1414 | { | |
1415 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
1416 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
1417 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
1418 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
1419 | kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm; | |
1420 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; | |
1421 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
1422 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
1423 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
1424 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
1425 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
1426 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
1427 | } | |
1428 | ||
b0c632db HC |
1429 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
1430 | { | |
8f2abe6a | 1431 | int rc; |
b0c632db HC |
1432 | sigset_t sigsaved; |
1433 | ||
27291e21 DH |
1434 | if (guestdbg_exit_pending(vcpu)) { |
1435 | kvm_s390_prepare_debug_exit(vcpu); | |
1436 | return 0; | |
1437 | } | |
1438 | ||
b0c632db HC |
1439 | if (vcpu->sigset_active) |
1440 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1441 | ||
6352e4d2 DH |
1442 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
1443 | kvm_s390_vcpu_start(vcpu); | |
1444 | } else if (is_vcpu_stopped(vcpu)) { | |
1445 | pr_err_ratelimited("kvm-s390: can't run stopped vcpu %d\n", | |
1446 | vcpu->vcpu_id); | |
1447 | return -EINVAL; | |
1448 | } | |
b0c632db | 1449 | |
b028ee3e | 1450 | sync_regs(vcpu, kvm_run); |
d7b0b5eb | 1451 | |
dab4079d | 1452 | might_fault(); |
a76ccff6 | 1453 | rc = __vcpu_run(vcpu); |
9ace903d | 1454 | |
b1d16c49 CE |
1455 | if (signal_pending(current) && !rc) { |
1456 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 1457 | rc = -EINTR; |
b1d16c49 | 1458 | } |
8f2abe6a | 1459 | |
27291e21 DH |
1460 | if (guestdbg_exit_pending(vcpu) && !rc) { |
1461 | kvm_s390_prepare_debug_exit(vcpu); | |
1462 | rc = 0; | |
1463 | } | |
1464 | ||
b8e660b8 | 1465 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
1466 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
1467 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
1468 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
1469 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
1470 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
1471 | rc = 0; | |
1472 | } | |
1473 | ||
1474 | if (rc == -EREMOTE) { | |
1475 | /* intercept was handled, but userspace support is needed | |
1476 | * kvm_run has been prepared by the handler */ | |
1477 | rc = 0; | |
1478 | } | |
b0c632db | 1479 | |
b028ee3e | 1480 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 1481 | |
b0c632db HC |
1482 | if (vcpu->sigset_active) |
1483 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1484 | ||
b0c632db | 1485 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 1486 | return rc; |
b0c632db HC |
1487 | } |
1488 | ||
b0c632db HC |
1489 | /* |
1490 | * store status at address | |
1491 | * we use have two special cases: | |
1492 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
1493 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
1494 | */ | |
d0bce605 | 1495 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 1496 | { |
092670cd | 1497 | unsigned char archmode = 1; |
fda902cb | 1498 | unsigned int px; |
178bd789 | 1499 | u64 clkcomp; |
d0bce605 | 1500 | int rc; |
b0c632db | 1501 | |
d0bce605 HC |
1502 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
1503 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 1504 | return -EFAULT; |
d0bce605 HC |
1505 | gpa = SAVE_AREA_BASE; |
1506 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { | |
1507 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 1508 | return -EFAULT; |
d0bce605 HC |
1509 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
1510 | } | |
1511 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), | |
1512 | vcpu->arch.guest_fpregs.fprs, 128); | |
1513 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), | |
1514 | vcpu->run->s.regs.gprs, 128); | |
1515 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), | |
1516 | &vcpu->arch.sie_block->gpsw, 16); | |
fda902cb | 1517 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 | 1518 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
fda902cb | 1519 | &px, 4); |
d0bce605 HC |
1520 | rc |= write_guest_abs(vcpu, |
1521 | gpa + offsetof(struct save_area, fp_ctrl_reg), | |
1522 | &vcpu->arch.guest_fpregs.fpc, 4); | |
1523 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), | |
1524 | &vcpu->arch.sie_block->todpr, 4); | |
1525 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), | |
1526 | &vcpu->arch.sie_block->cputm, 8); | |
178bd789 | 1527 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d0bce605 HC |
1528 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
1529 | &clkcomp, 8); | |
1530 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), | |
1531 | &vcpu->run->s.regs.acrs, 64); | |
1532 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), | |
1533 | &vcpu->arch.sie_block->gcr, 128); | |
1534 | return rc ? -EFAULT : 0; | |
b0c632db HC |
1535 | } |
1536 | ||
e879892c TH |
1537 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
1538 | { | |
1539 | /* | |
1540 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
1541 | * copying in vcpu load/put. Lets update our copies before we save | |
1542 | * it into the save area | |
1543 | */ | |
1544 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1545 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1546 | save_access_regs(vcpu->run->s.regs.acrs); | |
1547 | ||
1548 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
1549 | } | |
1550 | ||
8ad35755 DH |
1551 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
1552 | { | |
1553 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
1554 | kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu); | |
1555 | exit_sie_sync(vcpu); | |
1556 | } | |
1557 | ||
1558 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
1559 | { | |
1560 | unsigned int i; | |
1561 | struct kvm_vcpu *vcpu; | |
1562 | ||
1563 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1564 | __disable_ibs_on_vcpu(vcpu); | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
1569 | { | |
1570 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
1571 | kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu); | |
1572 | exit_sie_sync(vcpu); | |
1573 | } | |
1574 | ||
6852d7b6 DH |
1575 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
1576 | { | |
8ad35755 DH |
1577 | int i, online_vcpus, started_vcpus = 0; |
1578 | ||
1579 | if (!is_vcpu_stopped(vcpu)) | |
1580 | return; | |
1581 | ||
6852d7b6 | 1582 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 1583 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 1584 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
1585 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
1586 | ||
1587 | for (i = 0; i < online_vcpus; i++) { | |
1588 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
1589 | started_vcpus++; | |
1590 | } | |
1591 | ||
1592 | if (started_vcpus == 0) { | |
1593 | /* we're the only active VCPU -> speed it up */ | |
1594 | __enable_ibs_on_vcpu(vcpu); | |
1595 | } else if (started_vcpus == 1) { | |
1596 | /* | |
1597 | * As we are starting a second VCPU, we have to disable | |
1598 | * the IBS facility on all VCPUs to remove potentially | |
1599 | * oustanding ENABLE requests. | |
1600 | */ | |
1601 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
1602 | } | |
1603 | ||
6852d7b6 | 1604 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
1605 | /* |
1606 | * Another VCPU might have used IBS while we were offline. | |
1607 | * Let's play safe and flush the VCPU at startup. | |
1608 | */ | |
d3d692c8 | 1609 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 1610 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 1611 | return; |
6852d7b6 DH |
1612 | } |
1613 | ||
1614 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
1615 | { | |
8ad35755 DH |
1616 | int i, online_vcpus, started_vcpus = 0; |
1617 | struct kvm_vcpu *started_vcpu = NULL; | |
1618 | ||
1619 | if (is_vcpu_stopped(vcpu)) | |
1620 | return; | |
1621 | ||
6852d7b6 | 1622 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 1623 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 1624 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
1625 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
1626 | ||
32f5ff63 | 1627 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 1628 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 1629 | |
6cddd432 | 1630 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
1631 | __disable_ibs_on_vcpu(vcpu); |
1632 | ||
1633 | for (i = 0; i < online_vcpus; i++) { | |
1634 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
1635 | started_vcpus++; | |
1636 | started_vcpu = vcpu->kvm->vcpus[i]; | |
1637 | } | |
1638 | } | |
1639 | ||
1640 | if (started_vcpus == 1) { | |
1641 | /* | |
1642 | * As we only have one VCPU left, we want to enable the | |
1643 | * IBS facility for that VCPU to speed it up. | |
1644 | */ | |
1645 | __enable_ibs_on_vcpu(started_vcpu); | |
1646 | } | |
1647 | ||
433b9ee4 | 1648 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 1649 | return; |
6852d7b6 DH |
1650 | } |
1651 | ||
d6712df9 CH |
1652 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
1653 | struct kvm_enable_cap *cap) | |
1654 | { | |
1655 | int r; | |
1656 | ||
1657 | if (cap->flags) | |
1658 | return -EINVAL; | |
1659 | ||
1660 | switch (cap->cap) { | |
fa6b7fe9 CH |
1661 | case KVM_CAP_S390_CSS_SUPPORT: |
1662 | if (!vcpu->kvm->arch.css_support) { | |
1663 | vcpu->kvm->arch.css_support = 1; | |
1664 | trace_kvm_s390_enable_css(vcpu->kvm); | |
1665 | } | |
1666 | r = 0; | |
1667 | break; | |
d6712df9 CH |
1668 | default: |
1669 | r = -EINVAL; | |
1670 | break; | |
1671 | } | |
1672 | return r; | |
1673 | } | |
1674 | ||
b0c632db HC |
1675 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1676 | unsigned int ioctl, unsigned long arg) | |
1677 | { | |
1678 | struct kvm_vcpu *vcpu = filp->private_data; | |
1679 | void __user *argp = (void __user *)arg; | |
800c1065 | 1680 | int idx; |
bc923cc9 | 1681 | long r; |
b0c632db | 1682 | |
93736624 AK |
1683 | switch (ioctl) { |
1684 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b | 1685 | struct kvm_s390_interrupt s390int; |
383d0b05 | 1686 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 1687 | |
93736624 | 1688 | r = -EFAULT; |
ba5c1e9b | 1689 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 1690 | break; |
383d0b05 JF |
1691 | if (s390int_to_s390irq(&s390int, &s390irq)) |
1692 | return -EINVAL; | |
1693 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 1694 | break; |
ba5c1e9b | 1695 | } |
b0c632db | 1696 | case KVM_S390_STORE_STATUS: |
800c1065 | 1697 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 1698 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 1699 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 1700 | break; |
b0c632db HC |
1701 | case KVM_S390_SET_INITIAL_PSW: { |
1702 | psw_t psw; | |
1703 | ||
bc923cc9 | 1704 | r = -EFAULT; |
b0c632db | 1705 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
1706 | break; |
1707 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
1708 | break; | |
b0c632db HC |
1709 | } |
1710 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
1711 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
1712 | break; | |
14eebd91 CO |
1713 | case KVM_SET_ONE_REG: |
1714 | case KVM_GET_ONE_REG: { | |
1715 | struct kvm_one_reg reg; | |
1716 | r = -EFAULT; | |
1717 | if (copy_from_user(®, argp, sizeof(reg))) | |
1718 | break; | |
1719 | if (ioctl == KVM_SET_ONE_REG) | |
1720 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
1721 | else | |
1722 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
1723 | break; | |
1724 | } | |
27e0393f CO |
1725 | #ifdef CONFIG_KVM_S390_UCONTROL |
1726 | case KVM_S390_UCAS_MAP: { | |
1727 | struct kvm_s390_ucas_mapping ucasmap; | |
1728 | ||
1729 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1730 | r = -EFAULT; | |
1731 | break; | |
1732 | } | |
1733 | ||
1734 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1735 | r = -EINVAL; | |
1736 | break; | |
1737 | } | |
1738 | ||
1739 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
1740 | ucasmap.vcpu_addr, ucasmap.length); | |
1741 | break; | |
1742 | } | |
1743 | case KVM_S390_UCAS_UNMAP: { | |
1744 | struct kvm_s390_ucas_mapping ucasmap; | |
1745 | ||
1746 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1747 | r = -EFAULT; | |
1748 | break; | |
1749 | } | |
1750 | ||
1751 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1752 | r = -EINVAL; | |
1753 | break; | |
1754 | } | |
1755 | ||
1756 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
1757 | ucasmap.length); | |
1758 | break; | |
1759 | } | |
1760 | #endif | |
ccc7910f | 1761 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 1762 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
1763 | break; |
1764 | } | |
d6712df9 CH |
1765 | case KVM_ENABLE_CAP: |
1766 | { | |
1767 | struct kvm_enable_cap cap; | |
1768 | r = -EFAULT; | |
1769 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1770 | break; | |
1771 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
1772 | break; | |
1773 | } | |
b0c632db | 1774 | default: |
3e6afcf1 | 1775 | r = -ENOTTY; |
b0c632db | 1776 | } |
bc923cc9 | 1777 | return r; |
b0c632db HC |
1778 | } |
1779 | ||
5b1c1493 CO |
1780 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
1781 | { | |
1782 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1783 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
1784 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
1785 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
1786 | get_page(vmf->page); | |
1787 | return 0; | |
1788 | } | |
1789 | #endif | |
1790 | return VM_FAULT_SIGBUS; | |
1791 | } | |
1792 | ||
5587027c AK |
1793 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
1794 | unsigned long npages) | |
db3fe4eb TY |
1795 | { |
1796 | return 0; | |
1797 | } | |
1798 | ||
b0c632db | 1799 | /* Section: memory related */ |
f7784b8e MT |
1800 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
1801 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
1802 | struct kvm_userspace_memory_region *mem, |
1803 | enum kvm_mr_change change) | |
b0c632db | 1804 | { |
dd2887e7 NW |
1805 | /* A few sanity checks. We can have memory slots which have to be |
1806 | located/ended at a segment boundary (1MB). The memory in userland is | |
1807 | ok to be fragmented into various different vmas. It is okay to mmap() | |
1808 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 1809 | |
598841ca | 1810 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
1811 | return -EINVAL; |
1812 | ||
598841ca | 1813 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
1814 | return -EINVAL; |
1815 | ||
f7784b8e MT |
1816 | return 0; |
1817 | } | |
1818 | ||
1819 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
1820 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
1821 | const struct kvm_memory_slot *old, |
1822 | enum kvm_mr_change change) | |
f7784b8e | 1823 | { |
f7850c92 | 1824 | int rc; |
f7784b8e | 1825 | |
2cef4deb CB |
1826 | /* If the basics of the memslot do not change, we do not want |
1827 | * to update the gmap. Every update causes several unnecessary | |
1828 | * segment translation exceptions. This is usually handled just | |
1829 | * fine by the normal fault handler + gmap, but it will also | |
1830 | * cause faults on the prefix page of running guest CPUs. | |
1831 | */ | |
1832 | if (old->userspace_addr == mem->userspace_addr && | |
1833 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
1834 | old->npages * PAGE_SIZE == mem->memory_size) | |
1835 | return; | |
598841ca CO |
1836 | |
1837 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
1838 | mem->guest_phys_addr, mem->memory_size); | |
1839 | if (rc) | |
f7850c92 | 1840 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 1841 | return; |
b0c632db HC |
1842 | } |
1843 | ||
b0c632db HC |
1844 | static int __init kvm_s390_init(void) |
1845 | { | |
ef50f7ac | 1846 | int ret; |
0ee75bea | 1847 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
1848 | if (ret) |
1849 | return ret; | |
1850 | ||
1851 | /* | |
1852 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 1853 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
1854 | * only set facilities that are known to work in KVM. |
1855 | */ | |
78c4b59f MM |
1856 | vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
1857 | if (!vfacilities) { | |
ef50f7ac CB |
1858 | kvm_exit(); |
1859 | return -ENOMEM; | |
1860 | } | |
78c4b59f | 1861 | memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); |
7be81a46 | 1862 | vfacilities[0] &= 0xff82fffbf47c2000UL; |
7feb6bb8 | 1863 | vfacilities[1] &= 0x005c000000000000UL; |
ef50f7ac | 1864 | return 0; |
b0c632db HC |
1865 | } |
1866 | ||
1867 | static void __exit kvm_s390_exit(void) | |
1868 | { | |
78c4b59f | 1869 | free_page((unsigned long) vfacilities); |
b0c632db HC |
1870 | kvm_exit(); |
1871 | } | |
1872 | ||
1873 | module_init(kvm_s390_init); | |
1874 | module_exit(kvm_s390_exit); | |
566af940 CH |
1875 | |
1876 | /* | |
1877 | * Enable autoloading of the kvm module. | |
1878 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
1879 | * since x86 takes a different approach. | |
1880 | */ | |
1881 | #include <linux/miscdevice.h> | |
1882 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
1883 | MODULE_ALIAS("devname:kvm"); |