Commit | Line | Data |
---|---|---|
b0c632db | 1 | /* |
a53c8fab | 2 | * hosting zSeries kernel virtual machines |
b0c632db | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 2008, 2009 |
b0c632db HC |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
15f36ebd | 14 | * Jason J. Herne <jjherne@us.ibm.com> |
b0c632db HC |
15 | */ |
16 | ||
17 | #include <linux/compiler.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/fs.h> | |
ca872302 | 20 | #include <linux/hrtimer.h> |
b0c632db HC |
21 | #include <linux/init.h> |
22 | #include <linux/kvm.h> | |
23 | #include <linux/kvm_host.h> | |
24 | #include <linux/module.h> | |
a374e892 | 25 | #include <linux/random.h> |
b0c632db | 26 | #include <linux/slab.h> |
ba5c1e9b | 27 | #include <linux/timer.h> |
cbb870c8 | 28 | #include <asm/asm-offsets.h> |
b0c632db HC |
29 | #include <asm/lowcore.h> |
30 | #include <asm/pgtable.h> | |
f5daba1d | 31 | #include <asm/nmi.h> |
a0616cde | 32 | #include <asm/switch_to.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) }, | |
f7819512 | 53 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
ce2e4f0b | 54 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 55 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 56 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
57 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
58 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 59 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 60 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
61 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
62 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
63 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
64 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
65 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
66 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
67 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 68 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
69 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
70 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
71 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
72 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
73 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 74 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
75 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
76 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 77 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
78 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
79 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 80 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 81 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 82 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 83 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 84 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
85 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
86 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 87 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
88 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
89 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
5288fbf0 CB |
90 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
91 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
92 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
93 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
94 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
95 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 96 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 97 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 98 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
99 | { NULL } |
100 | }; | |
101 | ||
9d8d5786 MM |
102 | /* upper facilities limit for kvm */ |
103 | unsigned long kvm_s390_fac_list_mask[] = { | |
104 | 0xff82fffbf4fc2000UL, | |
105 | 0x005c000000000000UL, | |
106 | }; | |
b0c632db | 107 | |
9d8d5786 | 108 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 109 | { |
9d8d5786 MM |
110 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
111 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
112 | } |
113 | ||
9d8d5786 MM |
114 | static struct gmap_notifier gmap_notifier; |
115 | ||
b0c632db | 116 | /* Section: not file related */ |
13a34e06 | 117 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
118 | { |
119 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 120 | return 0; |
b0c632db HC |
121 | } |
122 | ||
2c70fe44 CB |
123 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
124 | ||
b0c632db HC |
125 | int kvm_arch_hardware_setup(void) |
126 | { | |
2c70fe44 CB |
127 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
128 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
129 | return 0; |
130 | } | |
131 | ||
132 | void kvm_arch_hardware_unsetup(void) | |
133 | { | |
2c70fe44 | 134 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
135 | } |
136 | ||
b0c632db HC |
137 | int kvm_arch_init(void *opaque) |
138 | { | |
84877d93 CH |
139 | /* Register floating interrupt controller interface. */ |
140 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
141 | } |
142 | ||
b0c632db HC |
143 | /* Section: device related */ |
144 | long kvm_arch_dev_ioctl(struct file *filp, | |
145 | unsigned int ioctl, unsigned long arg) | |
146 | { | |
147 | if (ioctl == KVM_S390_ENABLE_SIE) | |
148 | return s390_enable_sie(); | |
149 | return -EINVAL; | |
150 | } | |
151 | ||
784aa3d7 | 152 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 153 | { |
d7b0b5eb CO |
154 | int r; |
155 | ||
2bd0ac4e | 156 | switch (ext) { |
d7b0b5eb | 157 | case KVM_CAP_S390_PSW: |
b6cf8788 | 158 | case KVM_CAP_S390_GMAP: |
52e16b18 | 159 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
160 | #ifdef CONFIG_KVM_S390_UCONTROL |
161 | case KVM_CAP_S390_UCONTROL: | |
162 | #endif | |
3c038e6b | 163 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 164 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 165 | case KVM_CAP_ONE_REG: |
d6712df9 | 166 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 167 | case KVM_CAP_S390_CSS_SUPPORT: |
ebc32262 | 168 | case KVM_CAP_IRQFD: |
10ccaa1e | 169 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 170 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 171 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 172 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 173 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 174 | case KVM_CAP_MP_STATE: |
2444b352 | 175 | case KVM_CAP_S390_USER_SIGP: |
d7b0b5eb CO |
176 | r = 1; |
177 | break; | |
e726b1bd CB |
178 | case KVM_CAP_NR_VCPUS: |
179 | case KVM_CAP_MAX_VCPUS: | |
180 | r = KVM_MAX_VCPUS; | |
181 | break; | |
e1e2e605 NW |
182 | case KVM_CAP_NR_MEMSLOTS: |
183 | r = KVM_USER_MEM_SLOTS; | |
184 | break; | |
1526bf9c | 185 | case KVM_CAP_S390_COW: |
abf09bed | 186 | r = MACHINE_HAS_ESOP; |
1526bf9c | 187 | break; |
2bd0ac4e | 188 | default: |
d7b0b5eb | 189 | r = 0; |
2bd0ac4e | 190 | } |
d7b0b5eb | 191 | return r; |
b0c632db HC |
192 | } |
193 | ||
15f36ebd JH |
194 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
195 | struct kvm_memory_slot *memslot) | |
196 | { | |
197 | gfn_t cur_gfn, last_gfn; | |
198 | unsigned long address; | |
199 | struct gmap *gmap = kvm->arch.gmap; | |
200 | ||
201 | down_read(&gmap->mm->mmap_sem); | |
202 | /* Loop over all guest pages */ | |
203 | last_gfn = memslot->base_gfn + memslot->npages; | |
204 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
205 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
206 | ||
207 | if (gmap_test_and_clear_dirty(address, gmap)) | |
208 | mark_page_dirty(kvm, cur_gfn); | |
209 | } | |
210 | up_read(&gmap->mm->mmap_sem); | |
211 | } | |
212 | ||
b0c632db HC |
213 | /* Section: vm related */ |
214 | /* | |
215 | * Get (and clear) the dirty memory log for a memory slot. | |
216 | */ | |
217 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
218 | struct kvm_dirty_log *log) | |
219 | { | |
15f36ebd JH |
220 | int r; |
221 | unsigned long n; | |
222 | struct kvm_memory_slot *memslot; | |
223 | int is_dirty = 0; | |
224 | ||
225 | mutex_lock(&kvm->slots_lock); | |
226 | ||
227 | r = -EINVAL; | |
228 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
229 | goto out; | |
230 | ||
231 | memslot = id_to_memslot(kvm->memslots, log->slot); | |
232 | r = -ENOENT; | |
233 | if (!memslot->dirty_bitmap) | |
234 | goto out; | |
235 | ||
236 | kvm_s390_sync_dirty_log(kvm, memslot); | |
237 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
238 | if (r) | |
239 | goto out; | |
240 | ||
241 | /* Clear the dirty log */ | |
242 | if (is_dirty) { | |
243 | n = kvm_dirty_bitmap_bytes(memslot); | |
244 | memset(memslot->dirty_bitmap, 0, n); | |
245 | } | |
246 | r = 0; | |
247 | out: | |
248 | mutex_unlock(&kvm->slots_lock); | |
249 | return r; | |
b0c632db HC |
250 | } |
251 | ||
d938dc55 CH |
252 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
253 | { | |
254 | int r; | |
255 | ||
256 | if (cap->flags) | |
257 | return -EINVAL; | |
258 | ||
259 | switch (cap->cap) { | |
84223598 CH |
260 | case KVM_CAP_S390_IRQCHIP: |
261 | kvm->arch.use_irqchip = 1; | |
262 | r = 0; | |
263 | break; | |
2444b352 DH |
264 | case KVM_CAP_S390_USER_SIGP: |
265 | kvm->arch.user_sigp = 1; | |
266 | r = 0; | |
267 | break; | |
d938dc55 CH |
268 | default: |
269 | r = -EINVAL; | |
270 | break; | |
271 | } | |
272 | return r; | |
273 | } | |
274 | ||
8c0a7ce6 DD |
275 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
276 | { | |
277 | int ret; | |
278 | ||
279 | switch (attr->attr) { | |
280 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
281 | ret = 0; | |
282 | if (put_user(kvm->arch.gmap->asce_end, (u64 __user *)attr->addr)) | |
283 | ret = -EFAULT; | |
284 | break; | |
285 | default: | |
286 | ret = -ENXIO; | |
287 | break; | |
288 | } | |
289 | return ret; | |
290 | } | |
291 | ||
292 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
293 | { |
294 | int ret; | |
295 | unsigned int idx; | |
296 | switch (attr->attr) { | |
297 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
298 | ret = -EBUSY; | |
299 | mutex_lock(&kvm->lock); | |
300 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
301 | kvm->arch.use_cmma = 1; | |
302 | ret = 0; | |
303 | } | |
304 | mutex_unlock(&kvm->lock); | |
305 | break; | |
306 | case KVM_S390_VM_MEM_CLR_CMMA: | |
307 | mutex_lock(&kvm->lock); | |
308 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 309 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
310 | srcu_read_unlock(&kvm->srcu, idx); |
311 | mutex_unlock(&kvm->lock); | |
312 | ret = 0; | |
313 | break; | |
8c0a7ce6 DD |
314 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
315 | unsigned long new_limit; | |
316 | ||
317 | if (kvm_is_ucontrol(kvm)) | |
318 | return -EINVAL; | |
319 | ||
320 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
321 | return -EFAULT; | |
322 | ||
323 | if (new_limit > kvm->arch.gmap->asce_end) | |
324 | return -E2BIG; | |
325 | ||
326 | ret = -EBUSY; | |
327 | mutex_lock(&kvm->lock); | |
328 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
329 | /* gmap_alloc will round the limit up */ | |
330 | struct gmap *new = gmap_alloc(current->mm, new_limit); | |
331 | ||
332 | if (!new) { | |
333 | ret = -ENOMEM; | |
334 | } else { | |
335 | gmap_free(kvm->arch.gmap); | |
336 | new->private = kvm; | |
337 | kvm->arch.gmap = new; | |
338 | ret = 0; | |
339 | } | |
340 | } | |
341 | mutex_unlock(&kvm->lock); | |
342 | break; | |
343 | } | |
4f718eab DD |
344 | default: |
345 | ret = -ENXIO; | |
346 | break; | |
347 | } | |
348 | return ret; | |
349 | } | |
350 | ||
a374e892 TK |
351 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
352 | ||
353 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
354 | { | |
355 | struct kvm_vcpu *vcpu; | |
356 | int i; | |
357 | ||
9d8d5786 | 358 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
359 | return -EINVAL; |
360 | ||
361 | mutex_lock(&kvm->lock); | |
362 | switch (attr->attr) { | |
363 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
364 | get_random_bytes( | |
365 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
366 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
367 | kvm->arch.crypto.aes_kw = 1; | |
368 | break; | |
369 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
370 | get_random_bytes( | |
371 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
372 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
373 | kvm->arch.crypto.dea_kw = 1; | |
374 | break; | |
375 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
376 | kvm->arch.crypto.aes_kw = 0; | |
377 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
378 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
379 | break; | |
380 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
381 | kvm->arch.crypto.dea_kw = 0; | |
382 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
383 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
384 | break; | |
385 | default: | |
386 | mutex_unlock(&kvm->lock); | |
387 | return -ENXIO; | |
388 | } | |
389 | ||
390 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
391 | kvm_s390_vcpu_crypto_setup(vcpu); | |
392 | exit_sie(vcpu); | |
393 | } | |
394 | mutex_unlock(&kvm->lock); | |
395 | return 0; | |
396 | } | |
397 | ||
72f25020 JH |
398 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
399 | { | |
400 | u8 gtod_high; | |
401 | ||
402 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
403 | sizeof(gtod_high))) | |
404 | return -EFAULT; | |
405 | ||
406 | if (gtod_high != 0) | |
407 | return -EINVAL; | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
413 | { | |
414 | struct kvm_vcpu *cur_vcpu; | |
415 | unsigned int vcpu_idx; | |
416 | u64 host_tod, gtod; | |
417 | int r; | |
418 | ||
419 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
420 | return -EFAULT; | |
421 | ||
422 | r = store_tod_clock(&host_tod); | |
423 | if (r) | |
424 | return r; | |
425 | ||
426 | mutex_lock(&kvm->lock); | |
427 | kvm->arch.epoch = gtod - host_tod; | |
428 | kvm_for_each_vcpu(vcpu_idx, cur_vcpu, kvm) { | |
429 | cur_vcpu->arch.sie_block->epoch = kvm->arch.epoch; | |
430 | exit_sie(cur_vcpu); | |
431 | } | |
432 | mutex_unlock(&kvm->lock); | |
433 | return 0; | |
434 | } | |
435 | ||
436 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
437 | { | |
438 | int ret; | |
439 | ||
440 | if (attr->flags) | |
441 | return -EINVAL; | |
442 | ||
443 | switch (attr->attr) { | |
444 | case KVM_S390_VM_TOD_HIGH: | |
445 | ret = kvm_s390_set_tod_high(kvm, attr); | |
446 | break; | |
447 | case KVM_S390_VM_TOD_LOW: | |
448 | ret = kvm_s390_set_tod_low(kvm, attr); | |
449 | break; | |
450 | default: | |
451 | ret = -ENXIO; | |
452 | break; | |
453 | } | |
454 | return ret; | |
455 | } | |
456 | ||
457 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
458 | { | |
459 | u8 gtod_high = 0; | |
460 | ||
461 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
462 | sizeof(gtod_high))) | |
463 | return -EFAULT; | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
469 | { | |
470 | u64 host_tod, gtod; | |
471 | int r; | |
472 | ||
473 | r = store_tod_clock(&host_tod); | |
474 | if (r) | |
475 | return r; | |
476 | ||
477 | gtod = host_tod + kvm->arch.epoch; | |
478 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) | |
479 | return -EFAULT; | |
480 | ||
481 | return 0; | |
482 | } | |
483 | ||
484 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
485 | { | |
486 | int ret; | |
487 | ||
488 | if (attr->flags) | |
489 | return -EINVAL; | |
490 | ||
491 | switch (attr->attr) { | |
492 | case KVM_S390_VM_TOD_HIGH: | |
493 | ret = kvm_s390_get_tod_high(kvm, attr); | |
494 | break; | |
495 | case KVM_S390_VM_TOD_LOW: | |
496 | ret = kvm_s390_get_tod_low(kvm, attr); | |
497 | break; | |
498 | default: | |
499 | ret = -ENXIO; | |
500 | break; | |
501 | } | |
502 | return ret; | |
503 | } | |
504 | ||
658b6eda MM |
505 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
506 | { | |
507 | struct kvm_s390_vm_cpu_processor *proc; | |
508 | int ret = 0; | |
509 | ||
510 | mutex_lock(&kvm->lock); | |
511 | if (atomic_read(&kvm->online_vcpus)) { | |
512 | ret = -EBUSY; | |
513 | goto out; | |
514 | } | |
515 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
516 | if (!proc) { | |
517 | ret = -ENOMEM; | |
518 | goto out; | |
519 | } | |
520 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
521 | sizeof(*proc))) { | |
522 | memcpy(&kvm->arch.model.cpu_id, &proc->cpuid, | |
523 | sizeof(struct cpuid)); | |
524 | kvm->arch.model.ibc = proc->ibc; | |
981467c9 | 525 | memcpy(kvm->arch.model.fac->list, proc->fac_list, |
658b6eda MM |
526 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
527 | } else | |
528 | ret = -EFAULT; | |
529 | kfree(proc); | |
530 | out: | |
531 | mutex_unlock(&kvm->lock); | |
532 | return ret; | |
533 | } | |
534 | ||
535 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
536 | { | |
537 | int ret = -ENXIO; | |
538 | ||
539 | switch (attr->attr) { | |
540 | case KVM_S390_VM_CPU_PROCESSOR: | |
541 | ret = kvm_s390_set_processor(kvm, attr); | |
542 | break; | |
543 | } | |
544 | return ret; | |
545 | } | |
546 | ||
547 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
548 | { | |
549 | struct kvm_s390_vm_cpu_processor *proc; | |
550 | int ret = 0; | |
551 | ||
552 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
553 | if (!proc) { | |
554 | ret = -ENOMEM; | |
555 | goto out; | |
556 | } | |
557 | memcpy(&proc->cpuid, &kvm->arch.model.cpu_id, sizeof(struct cpuid)); | |
558 | proc->ibc = kvm->arch.model.ibc; | |
981467c9 | 559 | memcpy(&proc->fac_list, kvm->arch.model.fac->list, S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
560 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
561 | ret = -EFAULT; | |
562 | kfree(proc); | |
563 | out: | |
564 | return ret; | |
565 | } | |
566 | ||
567 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
568 | { | |
569 | struct kvm_s390_vm_cpu_machine *mach; | |
570 | int ret = 0; | |
571 | ||
572 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
573 | if (!mach) { | |
574 | ret = -ENOMEM; | |
575 | goto out; | |
576 | } | |
577 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
578 | mach->ibc = sclp_get_ibc(); | |
981467c9 MM |
579 | memcpy(&mach->fac_mask, kvm->arch.model.fac->mask, |
580 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
658b6eda | 581 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
94422ee8 | 582 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
583 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
584 | ret = -EFAULT; | |
585 | kfree(mach); | |
586 | out: | |
587 | return ret; | |
588 | } | |
589 | ||
590 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
591 | { | |
592 | int ret = -ENXIO; | |
593 | ||
594 | switch (attr->attr) { | |
595 | case KVM_S390_VM_CPU_PROCESSOR: | |
596 | ret = kvm_s390_get_processor(kvm, attr); | |
597 | break; | |
598 | case KVM_S390_VM_CPU_MACHINE: | |
599 | ret = kvm_s390_get_machine(kvm, attr); | |
600 | break; | |
601 | } | |
602 | return ret; | |
603 | } | |
604 | ||
f2061656 DD |
605 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
606 | { | |
607 | int ret; | |
608 | ||
609 | switch (attr->group) { | |
4f718eab | 610 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 611 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 612 | break; |
72f25020 JH |
613 | case KVM_S390_VM_TOD: |
614 | ret = kvm_s390_set_tod(kvm, attr); | |
615 | break; | |
658b6eda MM |
616 | case KVM_S390_VM_CPU_MODEL: |
617 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
618 | break; | |
a374e892 TK |
619 | case KVM_S390_VM_CRYPTO: |
620 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
621 | break; | |
f2061656 DD |
622 | default: |
623 | ret = -ENXIO; | |
624 | break; | |
625 | } | |
626 | ||
627 | return ret; | |
628 | } | |
629 | ||
630 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
631 | { | |
8c0a7ce6 DD |
632 | int ret; |
633 | ||
634 | switch (attr->group) { | |
635 | case KVM_S390_VM_MEM_CTRL: | |
636 | ret = kvm_s390_get_mem_control(kvm, attr); | |
637 | break; | |
72f25020 JH |
638 | case KVM_S390_VM_TOD: |
639 | ret = kvm_s390_get_tod(kvm, attr); | |
640 | break; | |
658b6eda MM |
641 | case KVM_S390_VM_CPU_MODEL: |
642 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
643 | break; | |
8c0a7ce6 DD |
644 | default: |
645 | ret = -ENXIO; | |
646 | break; | |
647 | } | |
648 | ||
649 | return ret; | |
f2061656 DD |
650 | } |
651 | ||
652 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
653 | { | |
654 | int ret; | |
655 | ||
656 | switch (attr->group) { | |
4f718eab DD |
657 | case KVM_S390_VM_MEM_CTRL: |
658 | switch (attr->attr) { | |
659 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
660 | case KVM_S390_VM_MEM_CLR_CMMA: | |
8c0a7ce6 | 661 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
662 | ret = 0; |
663 | break; | |
664 | default: | |
665 | ret = -ENXIO; | |
666 | break; | |
667 | } | |
668 | break; | |
72f25020 JH |
669 | case KVM_S390_VM_TOD: |
670 | switch (attr->attr) { | |
671 | case KVM_S390_VM_TOD_LOW: | |
672 | case KVM_S390_VM_TOD_HIGH: | |
673 | ret = 0; | |
674 | break; | |
675 | default: | |
676 | ret = -ENXIO; | |
677 | break; | |
678 | } | |
679 | break; | |
658b6eda MM |
680 | case KVM_S390_VM_CPU_MODEL: |
681 | switch (attr->attr) { | |
682 | case KVM_S390_VM_CPU_PROCESSOR: | |
683 | case KVM_S390_VM_CPU_MACHINE: | |
684 | ret = 0; | |
685 | break; | |
686 | default: | |
687 | ret = -ENXIO; | |
688 | break; | |
689 | } | |
690 | break; | |
a374e892 TK |
691 | case KVM_S390_VM_CRYPTO: |
692 | switch (attr->attr) { | |
693 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
694 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
695 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
696 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
697 | ret = 0; | |
698 | break; | |
699 | default: | |
700 | ret = -ENXIO; | |
701 | break; | |
702 | } | |
703 | break; | |
f2061656 DD |
704 | default: |
705 | ret = -ENXIO; | |
706 | break; | |
707 | } | |
708 | ||
709 | return ret; | |
710 | } | |
711 | ||
b0c632db HC |
712 | long kvm_arch_vm_ioctl(struct file *filp, |
713 | unsigned int ioctl, unsigned long arg) | |
714 | { | |
715 | struct kvm *kvm = filp->private_data; | |
716 | void __user *argp = (void __user *)arg; | |
f2061656 | 717 | struct kvm_device_attr attr; |
b0c632db HC |
718 | int r; |
719 | ||
720 | switch (ioctl) { | |
ba5c1e9b CO |
721 | case KVM_S390_INTERRUPT: { |
722 | struct kvm_s390_interrupt s390int; | |
723 | ||
724 | r = -EFAULT; | |
725 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
726 | break; | |
727 | r = kvm_s390_inject_vm(kvm, &s390int); | |
728 | break; | |
729 | } | |
d938dc55 CH |
730 | case KVM_ENABLE_CAP: { |
731 | struct kvm_enable_cap cap; | |
732 | r = -EFAULT; | |
733 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
734 | break; | |
735 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
736 | break; | |
737 | } | |
84223598 CH |
738 | case KVM_CREATE_IRQCHIP: { |
739 | struct kvm_irq_routing_entry routing; | |
740 | ||
741 | r = -EINVAL; | |
742 | if (kvm->arch.use_irqchip) { | |
743 | /* Set up dummy routing. */ | |
744 | memset(&routing, 0, sizeof(routing)); | |
745 | kvm_set_irq_routing(kvm, &routing, 0, 0); | |
746 | r = 0; | |
747 | } | |
748 | break; | |
749 | } | |
f2061656 DD |
750 | case KVM_SET_DEVICE_ATTR: { |
751 | r = -EFAULT; | |
752 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
753 | break; | |
754 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
755 | break; | |
756 | } | |
757 | case KVM_GET_DEVICE_ATTR: { | |
758 | r = -EFAULT; | |
759 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
760 | break; | |
761 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
762 | break; | |
763 | } | |
764 | case KVM_HAS_DEVICE_ATTR: { | |
765 | r = -EFAULT; | |
766 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
767 | break; | |
768 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
769 | break; | |
770 | } | |
b0c632db | 771 | default: |
367e1319 | 772 | r = -ENOTTY; |
b0c632db HC |
773 | } |
774 | ||
775 | return r; | |
776 | } | |
777 | ||
45c9b47c TK |
778 | static int kvm_s390_query_ap_config(u8 *config) |
779 | { | |
780 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 781 | u32 cc = 0; |
45c9b47c | 782 | |
86044c8c | 783 | memset(config, 0, 128); |
45c9b47c TK |
784 | asm volatile( |
785 | "lgr 0,%1\n" | |
786 | "lgr 2,%2\n" | |
787 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 788 | "0: ipm %0\n" |
45c9b47c | 789 | "srl %0,28\n" |
86044c8c CB |
790 | "1:\n" |
791 | EX_TABLE(0b, 1b) | |
792 | : "+r" (cc) | |
45c9b47c TK |
793 | : "r" (fcn_code), "r" (config) |
794 | : "cc", "0", "2", "memory" | |
795 | ); | |
796 | ||
797 | return cc; | |
798 | } | |
799 | ||
800 | static int kvm_s390_apxa_installed(void) | |
801 | { | |
802 | u8 config[128]; | |
803 | int cc; | |
804 | ||
805 | if (test_facility(2) && test_facility(12)) { | |
806 | cc = kvm_s390_query_ap_config(config); | |
807 | ||
808 | if (cc) | |
809 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
810 | else | |
811 | return config[0] & 0x40; | |
812 | } | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
817 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
818 | { | |
819 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
820 | ||
821 | if (kvm_s390_apxa_installed()) | |
822 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
823 | else | |
824 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
825 | } | |
826 | ||
9d8d5786 MM |
827 | static void kvm_s390_get_cpu_id(struct cpuid *cpu_id) |
828 | { | |
829 | get_cpu_id(cpu_id); | |
830 | cpu_id->version = 0xff; | |
831 | } | |
832 | ||
5102ee87 TK |
833 | static int kvm_s390_crypto_init(struct kvm *kvm) |
834 | { | |
9d8d5786 | 835 | if (!test_kvm_facility(kvm, 76)) |
5102ee87 TK |
836 | return 0; |
837 | ||
838 | kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb), | |
839 | GFP_KERNEL | GFP_DMA); | |
840 | if (!kvm->arch.crypto.crycb) | |
841 | return -ENOMEM; | |
842 | ||
45c9b47c | 843 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 844 | |
ed6f76b4 TK |
845 | /* Enable AES/DEA protected key functions by default */ |
846 | kvm->arch.crypto.aes_kw = 1; | |
847 | kvm->arch.crypto.dea_kw = 1; | |
848 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
849 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
850 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
851 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
a374e892 | 852 | |
5102ee87 TK |
853 | return 0; |
854 | } | |
855 | ||
e08b9637 | 856 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 857 | { |
9d8d5786 | 858 | int i, rc; |
b0c632db | 859 | char debug_name[16]; |
f6c137ff | 860 | static unsigned long sca_offset; |
b0c632db | 861 | |
e08b9637 CO |
862 | rc = -EINVAL; |
863 | #ifdef CONFIG_KVM_S390_UCONTROL | |
864 | if (type & ~KVM_VM_S390_UCONTROL) | |
865 | goto out_err; | |
866 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
867 | goto out_err; | |
868 | #else | |
869 | if (type) | |
870 | goto out_err; | |
871 | #endif | |
872 | ||
b0c632db HC |
873 | rc = s390_enable_sie(); |
874 | if (rc) | |
d89f5eff | 875 | goto out_err; |
b0c632db | 876 | |
b290411a CO |
877 | rc = -ENOMEM; |
878 | ||
b0c632db HC |
879 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
880 | if (!kvm->arch.sca) | |
d89f5eff | 881 | goto out_err; |
f6c137ff CB |
882 | spin_lock(&kvm_lock); |
883 | sca_offset = (sca_offset + 16) & 0x7f0; | |
884 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); | |
885 | spin_unlock(&kvm_lock); | |
b0c632db HC |
886 | |
887 | sprintf(debug_name, "kvm-%u", current->pid); | |
888 | ||
889 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
890 | if (!kvm->arch.dbf) | |
891 | goto out_nodbf; | |
892 | ||
9d8d5786 MM |
893 | /* |
894 | * The architectural maximum amount of facilities is 16 kbit. To store | |
895 | * this amount, 2 kbyte of memory is required. Thus we need a full | |
981467c9 MM |
896 | * page to hold the guest facility list (arch.model.fac->list) and the |
897 | * facility mask (arch.model.fac->mask). Its address size has to be | |
9d8d5786 MM |
898 | * 31 bits and word aligned. |
899 | */ | |
900 | kvm->arch.model.fac = | |
981467c9 | 901 | (struct kvm_s390_fac *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
9d8d5786 MM |
902 | if (!kvm->arch.model.fac) |
903 | goto out_nofac; | |
904 | ||
fb5bf93f | 905 | /* Populate the facility mask initially. */ |
981467c9 | 906 | memcpy(kvm->arch.model.fac->mask, S390_lowcore.stfle_fac_list, |
94422ee8 | 907 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
9d8d5786 MM |
908 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
909 | if (i < kvm_s390_fac_list_mask_size()) | |
981467c9 | 910 | kvm->arch.model.fac->mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 911 | else |
981467c9 | 912 | kvm->arch.model.fac->mask[i] = 0UL; |
9d8d5786 MM |
913 | } |
914 | ||
981467c9 MM |
915 | /* Populate the facility list initially. */ |
916 | memcpy(kvm->arch.model.fac->list, kvm->arch.model.fac->mask, | |
917 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
918 | ||
9d8d5786 | 919 | kvm_s390_get_cpu_id(&kvm->arch.model.cpu_id); |
658b6eda | 920 | kvm->arch.model.ibc = sclp_get_ibc() & 0x0fff; |
9d8d5786 | 921 | |
5102ee87 TK |
922 | if (kvm_s390_crypto_init(kvm) < 0) |
923 | goto out_crypto; | |
924 | ||
ba5c1e9b CO |
925 | spin_lock_init(&kvm->arch.float_int.lock); |
926 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
8a242234 | 927 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 928 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 929 | |
b0c632db HC |
930 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
931 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
932 | ||
e08b9637 CO |
933 | if (type & KVM_VM_S390_UCONTROL) { |
934 | kvm->arch.gmap = NULL; | |
935 | } else { | |
0349985a | 936 | kvm->arch.gmap = gmap_alloc(current->mm, (1UL << 44) - 1); |
e08b9637 CO |
937 | if (!kvm->arch.gmap) |
938 | goto out_nogmap; | |
2c70fe44 | 939 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 940 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 941 | } |
fa6b7fe9 CH |
942 | |
943 | kvm->arch.css_support = 0; | |
84223598 | 944 | kvm->arch.use_irqchip = 0; |
72f25020 | 945 | kvm->arch.epoch = 0; |
fa6b7fe9 | 946 | |
8ad35755 DH |
947 | spin_lock_init(&kvm->arch.start_stop_lock); |
948 | ||
d89f5eff | 949 | return 0; |
598841ca | 950 | out_nogmap: |
5102ee87 TK |
951 | kfree(kvm->arch.crypto.crycb); |
952 | out_crypto: | |
9d8d5786 MM |
953 | free_page((unsigned long)kvm->arch.model.fac); |
954 | out_nofac: | |
598841ca | 955 | debug_unregister(kvm->arch.dbf); |
b0c632db HC |
956 | out_nodbf: |
957 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
958 | out_err: |
959 | return rc; | |
b0c632db HC |
960 | } |
961 | ||
d329c035 CB |
962 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
963 | { | |
964 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 965 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 966 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 967 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
968 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
969 | clear_bit(63 - vcpu->vcpu_id, | |
970 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
971 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
972 | (__u64) vcpu->arch.sie_block) | |
973 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
974 | } | |
abf4a71e | 975 | smp_mb(); |
27e0393f CO |
976 | |
977 | if (kvm_is_ucontrol(vcpu->kvm)) | |
978 | gmap_free(vcpu->arch.gmap); | |
979 | ||
b31605c1 DD |
980 | if (kvm_s390_cmma_enabled(vcpu->kvm)) |
981 | kvm_s390_vcpu_unsetup_cmma(vcpu); | |
d329c035 | 982 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 983 | |
6692cef3 | 984 | kvm_vcpu_uninit(vcpu); |
b110feaf | 985 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
986 | } |
987 | ||
988 | static void kvm_free_vcpus(struct kvm *kvm) | |
989 | { | |
990 | unsigned int i; | |
988a2cae | 991 | struct kvm_vcpu *vcpu; |
d329c035 | 992 | |
988a2cae GN |
993 | kvm_for_each_vcpu(i, vcpu, kvm) |
994 | kvm_arch_vcpu_destroy(vcpu); | |
995 | ||
996 | mutex_lock(&kvm->lock); | |
997 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
998 | kvm->vcpus[i] = NULL; | |
999 | ||
1000 | atomic_set(&kvm->online_vcpus, 0); | |
1001 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1002 | } |
1003 | ||
b0c632db HC |
1004 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1005 | { | |
d329c035 | 1006 | kvm_free_vcpus(kvm); |
9d8d5786 | 1007 | free_page((unsigned long)kvm->arch.model.fac); |
b0c632db | 1008 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 1009 | debug_unregister(kvm->arch.dbf); |
5102ee87 | 1010 | kfree(kvm->arch.crypto.crycb); |
27e0393f CO |
1011 | if (!kvm_is_ucontrol(kvm)) |
1012 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 1013 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1014 | kvm_s390_clear_float_irqs(kvm); |
b0c632db HC |
1015 | } |
1016 | ||
1017 | /* Section: vcpu related */ | |
dafd032a DD |
1018 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1019 | { | |
1020 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); | |
1021 | if (!vcpu->arch.gmap) | |
1022 | return -ENOMEM; | |
1023 | vcpu->arch.gmap->private = vcpu->kvm; | |
1024 | ||
1025 | return 0; | |
1026 | } | |
1027 | ||
b0c632db HC |
1028 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1029 | { | |
3c038e6b DD |
1030 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1031 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1032 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1033 | KVM_SYNC_GPRS | | |
9eed0735 | 1034 | KVM_SYNC_ACRS | |
b028ee3e DH |
1035 | KVM_SYNC_CRS | |
1036 | KVM_SYNC_ARCH0 | | |
1037 | KVM_SYNC_PFAULT; | |
dafd032a DD |
1038 | |
1039 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1040 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1041 | ||
b0c632db HC |
1042 | return 0; |
1043 | } | |
1044 | ||
b0c632db HC |
1045 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1046 | { | |
4725c860 MS |
1047 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
1048 | save_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db | 1049 | save_access_regs(vcpu->arch.host_acrs); |
4725c860 MS |
1050 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
1051 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 1052 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 1053 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 1054 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
1055 | } |
1056 | ||
1057 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1058 | { | |
9e6dabef | 1059 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 1060 | gmap_disable(vcpu->arch.gmap); |
4725c860 MS |
1061 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
1062 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 1063 | save_access_regs(vcpu->run->s.regs.acrs); |
4725c860 MS |
1064 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
1065 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db HC |
1066 | restore_access_regs(vcpu->arch.host_acrs); |
1067 | } | |
1068 | ||
1069 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1070 | { | |
1071 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1072 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1073 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1074 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
1075 | vcpu->arch.sie_block->cputm = 0UL; |
1076 | vcpu->arch.sie_block->ckc = 0UL; | |
1077 | vcpu->arch.sie_block->todpr = 0; | |
1078 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1079 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1080 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
1081 | vcpu->arch.guest_fpregs.fpc = 0; | |
1082 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
1083 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 1084 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1085 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1086 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1087 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1088 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1089 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1090 | } |
1091 | ||
31928aa5 | 1092 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1093 | { |
72f25020 JH |
1094 | mutex_lock(&vcpu->kvm->lock); |
1095 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; | |
1096 | mutex_unlock(&vcpu->kvm->lock); | |
dafd032a DD |
1097 | if (!kvm_is_ucontrol(vcpu->kvm)) |
1098 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; | |
42897d86 MT |
1099 | } |
1100 | ||
5102ee87 TK |
1101 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1102 | { | |
9d8d5786 | 1103 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1104 | return; |
1105 | ||
a374e892 TK |
1106 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1107 | ||
1108 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1109 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1110 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1111 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1112 | ||
5102ee87 TK |
1113 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1114 | } | |
1115 | ||
b31605c1 DD |
1116 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1117 | { | |
1118 | free_page(vcpu->arch.sie_block->cbrlo); | |
1119 | vcpu->arch.sie_block->cbrlo = 0; | |
1120 | } | |
1121 | ||
1122 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1123 | { | |
1124 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1125 | if (!vcpu->arch.sie_block->cbrlo) | |
1126 | return -ENOMEM; | |
1127 | ||
1128 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1129 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1130 | return 0; | |
1131 | } | |
1132 | ||
b0c632db HC |
1133 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1134 | { | |
b31605c1 | 1135 | int rc = 0; |
b31288fa | 1136 | |
9e6dabef CH |
1137 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1138 | CPUSTAT_SM | | |
69d0d3a3 CB |
1139 | CPUSTAT_STOPPED | |
1140 | CPUSTAT_GED); | |
fc34531d | 1141 | vcpu->arch.sie_block->ecb = 6; |
9d8d5786 | 1142 | if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1143 | vcpu->arch.sie_block->ecb |= 0x10; |
1144 | ||
69d0d3a3 | 1145 | vcpu->arch.sie_block->ecb2 = 8; |
ea5f4969 | 1146 | vcpu->arch.sie_block->eca = 0xC1002000U; |
217a4406 HC |
1147 | if (sclp_has_siif()) |
1148 | vcpu->arch.sie_block->eca |= 1; | |
ea5f4969 DH |
1149 | if (sclp_has_sigpif()) |
1150 | vcpu->arch.sie_block->eca |= 0x10000000U; | |
492d8642 | 1151 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
5a5e6536 | 1152 | |
b31605c1 DD |
1153 | if (kvm_s390_cmma_enabled(vcpu->kvm)) { |
1154 | rc = kvm_s390_vcpu_setup_cmma(vcpu); | |
1155 | if (rc) | |
1156 | return rc; | |
b31288fa | 1157 | } |
0ac96caf | 1158 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 1159 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 1160 | |
658b6eda | 1161 | mutex_lock(&vcpu->kvm->lock); |
9d8d5786 | 1162 | vcpu->arch.cpu_id = vcpu->kvm->arch.model.cpu_id; |
658b6eda MM |
1163 | vcpu->arch.sie_block->ibc = vcpu->kvm->arch.model.ibc; |
1164 | mutex_unlock(&vcpu->kvm->lock); | |
5102ee87 TK |
1165 | |
1166 | kvm_s390_vcpu_crypto_setup(vcpu); | |
1167 | ||
b31605c1 | 1168 | return rc; |
b0c632db HC |
1169 | } |
1170 | ||
1171 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1172 | unsigned int id) | |
1173 | { | |
4d47555a | 1174 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 1175 | struct sie_page *sie_page; |
4d47555a CO |
1176 | int rc = -EINVAL; |
1177 | ||
1178 | if (id >= KVM_MAX_VCPUS) | |
1179 | goto out; | |
1180 | ||
1181 | rc = -ENOMEM; | |
b0c632db | 1182 | |
b110feaf | 1183 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 1184 | if (!vcpu) |
4d47555a | 1185 | goto out; |
b0c632db | 1186 | |
7feb6bb8 MM |
1187 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
1188 | if (!sie_page) | |
b0c632db HC |
1189 | goto out_free_cpu; |
1190 | ||
7feb6bb8 MM |
1191 | vcpu->arch.sie_block = &sie_page->sie_block; |
1192 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
1193 | ||
b0c632db | 1194 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
1195 | if (!kvm_is_ucontrol(kvm)) { |
1196 | if (!kvm->arch.sca) { | |
1197 | WARN_ON_ONCE(1); | |
1198 | goto out_free_cpu; | |
1199 | } | |
1200 | if (!kvm->arch.sca->cpu[id].sda) | |
1201 | kvm->arch.sca->cpu[id].sda = | |
1202 | (__u64) vcpu->arch.sie_block; | |
1203 | vcpu->arch.sie_block->scaoh = | |
1204 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
1205 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
1206 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
1207 | } | |
981467c9 | 1208 | vcpu->arch.sie_block->fac = (int) (long) kvm->arch.model.fac->list; |
b0c632db | 1209 | |
ba5c1e9b | 1210 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 1211 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 1212 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 1213 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 1214 | |
b0c632db HC |
1215 | rc = kvm_vcpu_init(vcpu, kvm, id); |
1216 | if (rc) | |
7b06bf2f | 1217 | goto out_free_sie_block; |
b0c632db HC |
1218 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
1219 | vcpu->arch.sie_block); | |
ade38c31 | 1220 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 1221 | |
b0c632db | 1222 | return vcpu; |
7b06bf2f WY |
1223 | out_free_sie_block: |
1224 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 1225 | out_free_cpu: |
b110feaf | 1226 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 1227 | out: |
b0c632db HC |
1228 | return ERR_PTR(rc); |
1229 | } | |
1230 | ||
b0c632db HC |
1231 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
1232 | { | |
9a022067 | 1233 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
1234 | } |
1235 | ||
49b99e1e CB |
1236 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
1237 | { | |
1238 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
1239 | } | |
1240 | ||
1241 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
1242 | { | |
1243 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
1244 | } | |
1245 | ||
1246 | /* | |
1247 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
1248 | * If the CPU is not running (e.g. waiting as idle) the function will | |
1249 | * return immediately. */ | |
1250 | void exit_sie(struct kvm_vcpu *vcpu) | |
1251 | { | |
1252 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
1253 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
1254 | cpu_relax(); | |
1255 | } | |
1256 | ||
1257 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
1258 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
1259 | { | |
1260 | s390_vcpu_block(vcpu); | |
1261 | exit_sie(vcpu); | |
1262 | } | |
1263 | ||
2c70fe44 CB |
1264 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
1265 | { | |
1266 | int i; | |
1267 | struct kvm *kvm = gmap->private; | |
1268 | struct kvm_vcpu *vcpu; | |
1269 | ||
1270 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1271 | /* match against both prefix pages */ | |
fda902cb | 1272 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 CB |
1273 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
1274 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
1275 | exit_sie_sync(vcpu); | |
1276 | } | |
1277 | } | |
1278 | } | |
1279 | ||
b6d33834 CD |
1280 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
1281 | { | |
1282 | /* kvm common code refers to this, but never calls it */ | |
1283 | BUG(); | |
1284 | return 0; | |
1285 | } | |
1286 | ||
14eebd91 CO |
1287 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
1288 | struct kvm_one_reg *reg) | |
1289 | { | |
1290 | int r = -EINVAL; | |
1291 | ||
1292 | switch (reg->id) { | |
29b7c71b CO |
1293 | case KVM_REG_S390_TODPR: |
1294 | r = put_user(vcpu->arch.sie_block->todpr, | |
1295 | (u32 __user *)reg->addr); | |
1296 | break; | |
1297 | case KVM_REG_S390_EPOCHDIFF: | |
1298 | r = put_user(vcpu->arch.sie_block->epoch, | |
1299 | (u64 __user *)reg->addr); | |
1300 | break; | |
46a6dd1c J |
1301 | case KVM_REG_S390_CPU_TIMER: |
1302 | r = put_user(vcpu->arch.sie_block->cputm, | |
1303 | (u64 __user *)reg->addr); | |
1304 | break; | |
1305 | case KVM_REG_S390_CLOCK_COMP: | |
1306 | r = put_user(vcpu->arch.sie_block->ckc, | |
1307 | (u64 __user *)reg->addr); | |
1308 | break; | |
536336c2 DD |
1309 | case KVM_REG_S390_PFTOKEN: |
1310 | r = put_user(vcpu->arch.pfault_token, | |
1311 | (u64 __user *)reg->addr); | |
1312 | break; | |
1313 | case KVM_REG_S390_PFCOMPARE: | |
1314 | r = put_user(vcpu->arch.pfault_compare, | |
1315 | (u64 __user *)reg->addr); | |
1316 | break; | |
1317 | case KVM_REG_S390_PFSELECT: | |
1318 | r = put_user(vcpu->arch.pfault_select, | |
1319 | (u64 __user *)reg->addr); | |
1320 | break; | |
672550fb CB |
1321 | case KVM_REG_S390_PP: |
1322 | r = put_user(vcpu->arch.sie_block->pp, | |
1323 | (u64 __user *)reg->addr); | |
1324 | break; | |
afa45ff5 CB |
1325 | case KVM_REG_S390_GBEA: |
1326 | r = put_user(vcpu->arch.sie_block->gbea, | |
1327 | (u64 __user *)reg->addr); | |
1328 | break; | |
14eebd91 CO |
1329 | default: |
1330 | break; | |
1331 | } | |
1332 | ||
1333 | return r; | |
1334 | } | |
1335 | ||
1336 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
1337 | struct kvm_one_reg *reg) | |
1338 | { | |
1339 | int r = -EINVAL; | |
1340 | ||
1341 | switch (reg->id) { | |
29b7c71b CO |
1342 | case KVM_REG_S390_TODPR: |
1343 | r = get_user(vcpu->arch.sie_block->todpr, | |
1344 | (u32 __user *)reg->addr); | |
1345 | break; | |
1346 | case KVM_REG_S390_EPOCHDIFF: | |
1347 | r = get_user(vcpu->arch.sie_block->epoch, | |
1348 | (u64 __user *)reg->addr); | |
1349 | break; | |
46a6dd1c J |
1350 | case KVM_REG_S390_CPU_TIMER: |
1351 | r = get_user(vcpu->arch.sie_block->cputm, | |
1352 | (u64 __user *)reg->addr); | |
1353 | break; | |
1354 | case KVM_REG_S390_CLOCK_COMP: | |
1355 | r = get_user(vcpu->arch.sie_block->ckc, | |
1356 | (u64 __user *)reg->addr); | |
1357 | break; | |
536336c2 DD |
1358 | case KVM_REG_S390_PFTOKEN: |
1359 | r = get_user(vcpu->arch.pfault_token, | |
1360 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
1361 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
1362 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
1363 | break; |
1364 | case KVM_REG_S390_PFCOMPARE: | |
1365 | r = get_user(vcpu->arch.pfault_compare, | |
1366 | (u64 __user *)reg->addr); | |
1367 | break; | |
1368 | case KVM_REG_S390_PFSELECT: | |
1369 | r = get_user(vcpu->arch.pfault_select, | |
1370 | (u64 __user *)reg->addr); | |
1371 | break; | |
672550fb CB |
1372 | case KVM_REG_S390_PP: |
1373 | r = get_user(vcpu->arch.sie_block->pp, | |
1374 | (u64 __user *)reg->addr); | |
1375 | break; | |
afa45ff5 CB |
1376 | case KVM_REG_S390_GBEA: |
1377 | r = get_user(vcpu->arch.sie_block->gbea, | |
1378 | (u64 __user *)reg->addr); | |
1379 | break; | |
14eebd91 CO |
1380 | default: |
1381 | break; | |
1382 | } | |
1383 | ||
1384 | return r; | |
1385 | } | |
b6d33834 | 1386 | |
b0c632db HC |
1387 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
1388 | { | |
b0c632db | 1389 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
1390 | return 0; |
1391 | } | |
1392 | ||
1393 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1394 | { | |
5a32c1af | 1395 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
1396 | return 0; |
1397 | } | |
1398 | ||
1399 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1400 | { | |
5a32c1af | 1401 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
1402 | return 0; |
1403 | } | |
1404 | ||
1405 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
1406 | struct kvm_sregs *sregs) | |
1407 | { | |
59674c1a | 1408 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 1409 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 1410 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
1411 | return 0; |
1412 | } | |
1413 | ||
1414 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
1415 | struct kvm_sregs *sregs) | |
1416 | { | |
59674c1a | 1417 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 1418 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
1419 | return 0; |
1420 | } | |
1421 | ||
1422 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1423 | { | |
4725c860 MS |
1424 | if (test_fp_ctl(fpu->fpc)) |
1425 | return -EINVAL; | |
b0c632db | 1426 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 MS |
1427 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
1428 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1429 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
b0c632db HC |
1430 | return 0; |
1431 | } | |
1432 | ||
1433 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1434 | { | |
b0c632db HC |
1435 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
1436 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
1437 | return 0; |
1438 | } | |
1439 | ||
1440 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
1441 | { | |
1442 | int rc = 0; | |
1443 | ||
7a42fdc2 | 1444 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 1445 | rc = -EBUSY; |
d7b0b5eb CO |
1446 | else { |
1447 | vcpu->run->psw_mask = psw.mask; | |
1448 | vcpu->run->psw_addr = psw.addr; | |
1449 | } | |
b0c632db HC |
1450 | return rc; |
1451 | } | |
1452 | ||
1453 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
1454 | struct kvm_translation *tr) | |
1455 | { | |
1456 | return -EINVAL; /* not implemented yet */ | |
1457 | } | |
1458 | ||
27291e21 DH |
1459 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
1460 | KVM_GUESTDBG_USE_HW_BP | \ | |
1461 | KVM_GUESTDBG_ENABLE) | |
1462 | ||
d0bfb940 JK |
1463 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
1464 | struct kvm_guest_debug *dbg) | |
b0c632db | 1465 | { |
27291e21 DH |
1466 | int rc = 0; |
1467 | ||
1468 | vcpu->guest_debug = 0; | |
1469 | kvm_s390_clear_bp_data(vcpu); | |
1470 | ||
2de3bfc2 | 1471 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
1472 | return -EINVAL; |
1473 | ||
1474 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
1475 | vcpu->guest_debug = dbg->control; | |
1476 | /* enforce guest PER */ | |
1477 | atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1478 | ||
1479 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
1480 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
1481 | } else { | |
1482 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1483 | vcpu->arch.guestdbg.last_bp = 0; | |
1484 | } | |
1485 | ||
1486 | if (rc) { | |
1487 | vcpu->guest_debug = 0; | |
1488 | kvm_s390_clear_bp_data(vcpu); | |
1489 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1490 | } | |
1491 | ||
1492 | return rc; | |
b0c632db HC |
1493 | } |
1494 | ||
62d9f0db MT |
1495 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
1496 | struct kvm_mp_state *mp_state) | |
1497 | { | |
6352e4d2 DH |
1498 | /* CHECK_STOP and LOAD are not supported yet */ |
1499 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
1500 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
1501 | } |
1502 | ||
1503 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
1504 | struct kvm_mp_state *mp_state) | |
1505 | { | |
6352e4d2 DH |
1506 | int rc = 0; |
1507 | ||
1508 | /* user space knows about this interface - let it control the state */ | |
1509 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
1510 | ||
1511 | switch (mp_state->mp_state) { | |
1512 | case KVM_MP_STATE_STOPPED: | |
1513 | kvm_s390_vcpu_stop(vcpu); | |
1514 | break; | |
1515 | case KVM_MP_STATE_OPERATING: | |
1516 | kvm_s390_vcpu_start(vcpu); | |
1517 | break; | |
1518 | case KVM_MP_STATE_LOAD: | |
1519 | case KVM_MP_STATE_CHECK_STOP: | |
1520 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
1521 | default: | |
1522 | rc = -ENXIO; | |
1523 | } | |
1524 | ||
1525 | return rc; | |
62d9f0db MT |
1526 | } |
1527 | ||
b31605c1 DD |
1528 | bool kvm_s390_cmma_enabled(struct kvm *kvm) |
1529 | { | |
1530 | if (!MACHINE_IS_LPAR) | |
1531 | return false; | |
1532 | /* only enable for z10 and later */ | |
1533 | if (!MACHINE_HAS_EDAT1) | |
1534 | return false; | |
1535 | if (!kvm->arch.use_cmma) | |
1536 | return false; | |
1537 | return true; | |
1538 | } | |
1539 | ||
8ad35755 DH |
1540 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
1541 | { | |
1542 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
1543 | } | |
1544 | ||
2c70fe44 CB |
1545 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
1546 | { | |
8ad35755 DH |
1547 | retry: |
1548 | s390_vcpu_unblock(vcpu); | |
2c70fe44 CB |
1549 | /* |
1550 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
1551 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
1552 | * This ensures that the ipte instruction for this request has | |
1553 | * already finished. We might race against a second unmapper that | |
1554 | * wants to set the blocking bit. Lets just retry the request loop. | |
1555 | */ | |
8ad35755 | 1556 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
1557 | int rc; |
1558 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 1559 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
1560 | PAGE_SIZE * 2); |
1561 | if (rc) | |
1562 | return rc; | |
8ad35755 | 1563 | goto retry; |
2c70fe44 | 1564 | } |
8ad35755 | 1565 | |
d3d692c8 DH |
1566 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
1567 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
1568 | goto retry; | |
1569 | } | |
1570 | ||
8ad35755 DH |
1571 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
1572 | if (!ibs_enabled(vcpu)) { | |
1573 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
1574 | atomic_set_mask(CPUSTAT_IBS, | |
1575 | &vcpu->arch.sie_block->cpuflags); | |
1576 | } | |
1577 | goto retry; | |
2c70fe44 | 1578 | } |
8ad35755 DH |
1579 | |
1580 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
1581 | if (ibs_enabled(vcpu)) { | |
1582 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
1583 | atomic_clear_mask(CPUSTAT_IBS, | |
1584 | &vcpu->arch.sie_block->cpuflags); | |
1585 | } | |
1586 | goto retry; | |
1587 | } | |
1588 | ||
0759d068 DH |
1589 | /* nothing to do, just clear the request */ |
1590 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
1591 | ||
2c70fe44 CB |
1592 | return 0; |
1593 | } | |
1594 | ||
fa576c58 TH |
1595 | /** |
1596 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
1597 | * @vcpu: The corresponding virtual cpu | |
1598 | * @gpa: Guest physical address | |
1599 | * @writable: Whether the page should be writable or not | |
1600 | * | |
1601 | * Make sure that a guest page has been faulted-in on the host. | |
1602 | * | |
1603 | * Return: Zero on success, negative error code otherwise. | |
1604 | */ | |
1605 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 1606 | { |
527e30b4 MS |
1607 | return gmap_fault(vcpu->arch.gmap, gpa, |
1608 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
1609 | } |
1610 | ||
3c038e6b DD |
1611 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
1612 | unsigned long token) | |
1613 | { | |
1614 | struct kvm_s390_interrupt inti; | |
383d0b05 | 1615 | struct kvm_s390_irq irq; |
3c038e6b DD |
1616 | |
1617 | if (start_token) { | |
383d0b05 JF |
1618 | irq.u.ext.ext_params2 = token; |
1619 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
1620 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
1621 | } else { |
1622 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 1623 | inti.parm64 = token; |
3c038e6b DD |
1624 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
1625 | } | |
1626 | } | |
1627 | ||
1628 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
1629 | struct kvm_async_pf *work) | |
1630 | { | |
1631 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
1632 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
1633 | } | |
1634 | ||
1635 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
1636 | struct kvm_async_pf *work) | |
1637 | { | |
1638 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
1639 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
1640 | } | |
1641 | ||
1642 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
1643 | struct kvm_async_pf *work) | |
1644 | { | |
1645 | /* s390 will always inject the page directly */ | |
1646 | } | |
1647 | ||
1648 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
1649 | { | |
1650 | /* | |
1651 | * s390 will always inject the page directly, | |
1652 | * but we still want check_async_completion to cleanup | |
1653 | */ | |
1654 | return true; | |
1655 | } | |
1656 | ||
1657 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
1658 | { | |
1659 | hva_t hva; | |
1660 | struct kvm_arch_async_pf arch; | |
1661 | int rc; | |
1662 | ||
1663 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
1664 | return 0; | |
1665 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
1666 | vcpu->arch.pfault_compare) | |
1667 | return 0; | |
1668 | if (psw_extint_disabled(vcpu)) | |
1669 | return 0; | |
9a022067 | 1670 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
1671 | return 0; |
1672 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
1673 | return 0; | |
1674 | if (!vcpu->arch.gmap->pfault_enabled) | |
1675 | return 0; | |
1676 | ||
81480cc1 HC |
1677 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
1678 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
1679 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
1680 | return 0; |
1681 | ||
1682 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
1683 | return rc; | |
1684 | } | |
1685 | ||
3fb4c40f | 1686 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 1687 | { |
3fb4c40f | 1688 | int rc, cpuflags; |
e168bf8d | 1689 | |
3c038e6b DD |
1690 | /* |
1691 | * On s390 notifications for arriving pages will be delivered directly | |
1692 | * to the guest but the house keeping for completed pfaults is | |
1693 | * handled outside the worker. | |
1694 | */ | |
1695 | kvm_check_async_pf_completion(vcpu); | |
1696 | ||
5a32c1af | 1697 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
1698 | |
1699 | if (need_resched()) | |
1700 | schedule(); | |
1701 | ||
d3a73acb | 1702 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
1703 | s390_handle_mcck(); |
1704 | ||
79395031 JF |
1705 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
1706 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
1707 | if (rc) | |
1708 | return rc; | |
1709 | } | |
0ff31867 | 1710 | |
2c70fe44 CB |
1711 | rc = kvm_s390_handle_requests(vcpu); |
1712 | if (rc) | |
1713 | return rc; | |
1714 | ||
27291e21 DH |
1715 | if (guestdbg_enabled(vcpu)) { |
1716 | kvm_s390_backup_guest_per_regs(vcpu); | |
1717 | kvm_s390_patch_guest_per_regs(vcpu); | |
1718 | } | |
1719 | ||
b0c632db | 1720 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
1721 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
1722 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
1723 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 1724 | |
3fb4c40f TH |
1725 | return 0; |
1726 | } | |
1727 | ||
492d8642 TH |
1728 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
1729 | { | |
1730 | psw_t *psw = &vcpu->arch.sie_block->gpsw; | |
1731 | u8 opcode; | |
1732 | int rc; | |
1733 | ||
1734 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
1735 | trace_kvm_s390_sie_fault(vcpu); | |
1736 | ||
1737 | /* | |
1738 | * We want to inject an addressing exception, which is defined as a | |
1739 | * suppressing or terminating exception. However, since we came here | |
1740 | * by a DAT access exception, the PSW still points to the faulting | |
1741 | * instruction since DAT exceptions are nullifying. So we've got | |
1742 | * to look up the current opcode to get the length of the instruction | |
1743 | * to be able to forward the PSW. | |
1744 | */ | |
1745 | rc = read_guest(vcpu, psw->addr, &opcode, 1); | |
1746 | if (rc) | |
1747 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
1748 | psw->addr = __rewind_psw(*psw, -insn_length(opcode)); | |
1749 | ||
1750 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
1751 | } | |
1752 | ||
3fb4c40f TH |
1753 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
1754 | { | |
24eb3a82 | 1755 | int rc = -1; |
2b29a9fd DD |
1756 | |
1757 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
1758 | vcpu->arch.sie_block->icptcode); | |
1759 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
1760 | ||
27291e21 DH |
1761 | if (guestdbg_enabled(vcpu)) |
1762 | kvm_s390_restore_guest_per_regs(vcpu); | |
1763 | ||
3fb4c40f | 1764 | if (exit_reason >= 0) { |
7c470539 | 1765 | rc = 0; |
210b1607 TH |
1766 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
1767 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
1768 | vcpu->run->s390_ucontrol.trans_exc_code = | |
1769 | current->thread.gmap_addr; | |
1770 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
1771 | rc = -EREMOTE; | |
24eb3a82 DD |
1772 | |
1773 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 1774 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 1775 | current->thread.gmap_pfault = 0; |
fa576c58 | 1776 | if (kvm_arch_setup_async_pf(vcpu)) { |
24eb3a82 | 1777 | rc = 0; |
fa576c58 TH |
1778 | } else { |
1779 | gpa_t gpa = current->thread.gmap_addr; | |
1780 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); | |
1781 | } | |
24eb3a82 DD |
1782 | } |
1783 | ||
492d8642 TH |
1784 | if (rc == -1) |
1785 | rc = vcpu_post_run_fault_in_sie(vcpu); | |
b0c632db | 1786 | |
5a32c1af | 1787 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 1788 | |
a76ccff6 TH |
1789 | if (rc == 0) { |
1790 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
1791 | /* Don't exit for host interrupts. */ |
1792 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
1793 | else |
1794 | rc = kvm_handle_sie_intercept(vcpu); | |
1795 | } | |
1796 | ||
3fb4c40f TH |
1797 | return rc; |
1798 | } | |
1799 | ||
1800 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
1801 | { | |
1802 | int rc, exit_reason; | |
1803 | ||
800c1065 TH |
1804 | /* |
1805 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
1806 | * ning the guest), so that memslots (and other stuff) are protected | |
1807 | */ | |
1808 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
1809 | ||
a76ccff6 TH |
1810 | do { |
1811 | rc = vcpu_pre_run(vcpu); | |
1812 | if (rc) | |
1813 | break; | |
3fb4c40f | 1814 | |
800c1065 | 1815 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
1816 | /* |
1817 | * As PF_VCPU will be used in fault handler, between | |
1818 | * guest_enter and guest_exit should be no uaccess. | |
1819 | */ | |
1820 | preempt_disable(); | |
1821 | kvm_guest_enter(); | |
1822 | preempt_enable(); | |
1823 | exit_reason = sie64a(vcpu->arch.sie_block, | |
1824 | vcpu->run->s.regs.gprs); | |
1825 | kvm_guest_exit(); | |
800c1065 | 1826 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
1827 | |
1828 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 1829 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 1830 | |
800c1065 | 1831 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 1832 | return rc; |
b0c632db HC |
1833 | } |
1834 | ||
b028ee3e DH |
1835 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
1836 | { | |
1837 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
1838 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
1839 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
1840 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
1841 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
1842 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
1843 | /* some control register changes require a tlb flush */ |
1844 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
1845 | } |
1846 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
1847 | vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; | |
1848 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; | |
1849 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
1850 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
1851 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
1852 | } | |
1853 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
1854 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
1855 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
1856 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
1857 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
1858 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e DH |
1859 | } |
1860 | kvm_run->kvm_dirty_regs = 0; | |
1861 | } | |
1862 | ||
1863 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
1864 | { | |
1865 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
1866 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
1867 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
1868 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
1869 | kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm; | |
1870 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; | |
1871 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
1872 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
1873 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
1874 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
1875 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
1876 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
1877 | } | |
1878 | ||
b0c632db HC |
1879 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
1880 | { | |
8f2abe6a | 1881 | int rc; |
b0c632db HC |
1882 | sigset_t sigsaved; |
1883 | ||
27291e21 DH |
1884 | if (guestdbg_exit_pending(vcpu)) { |
1885 | kvm_s390_prepare_debug_exit(vcpu); | |
1886 | return 0; | |
1887 | } | |
1888 | ||
b0c632db HC |
1889 | if (vcpu->sigset_active) |
1890 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1891 | ||
6352e4d2 DH |
1892 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
1893 | kvm_s390_vcpu_start(vcpu); | |
1894 | } else if (is_vcpu_stopped(vcpu)) { | |
1895 | pr_err_ratelimited("kvm-s390: can't run stopped vcpu %d\n", | |
1896 | vcpu->vcpu_id); | |
1897 | return -EINVAL; | |
1898 | } | |
b0c632db | 1899 | |
b028ee3e | 1900 | sync_regs(vcpu, kvm_run); |
d7b0b5eb | 1901 | |
dab4079d | 1902 | might_fault(); |
a76ccff6 | 1903 | rc = __vcpu_run(vcpu); |
9ace903d | 1904 | |
b1d16c49 CE |
1905 | if (signal_pending(current) && !rc) { |
1906 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 1907 | rc = -EINTR; |
b1d16c49 | 1908 | } |
8f2abe6a | 1909 | |
27291e21 DH |
1910 | if (guestdbg_exit_pending(vcpu) && !rc) { |
1911 | kvm_s390_prepare_debug_exit(vcpu); | |
1912 | rc = 0; | |
1913 | } | |
1914 | ||
b8e660b8 | 1915 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
1916 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
1917 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
1918 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
1919 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
1920 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
1921 | rc = 0; | |
1922 | } | |
1923 | ||
1924 | if (rc == -EREMOTE) { | |
1925 | /* intercept was handled, but userspace support is needed | |
1926 | * kvm_run has been prepared by the handler */ | |
1927 | rc = 0; | |
1928 | } | |
b0c632db | 1929 | |
b028ee3e | 1930 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 1931 | |
b0c632db HC |
1932 | if (vcpu->sigset_active) |
1933 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1934 | ||
b0c632db | 1935 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 1936 | return rc; |
b0c632db HC |
1937 | } |
1938 | ||
b0c632db HC |
1939 | /* |
1940 | * store status at address | |
1941 | * we use have two special cases: | |
1942 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
1943 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
1944 | */ | |
d0bce605 | 1945 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 1946 | { |
092670cd | 1947 | unsigned char archmode = 1; |
fda902cb | 1948 | unsigned int px; |
178bd789 | 1949 | u64 clkcomp; |
d0bce605 | 1950 | int rc; |
b0c632db | 1951 | |
d0bce605 HC |
1952 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
1953 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 1954 | return -EFAULT; |
d0bce605 HC |
1955 | gpa = SAVE_AREA_BASE; |
1956 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { | |
1957 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 1958 | return -EFAULT; |
d0bce605 HC |
1959 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
1960 | } | |
1961 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), | |
1962 | vcpu->arch.guest_fpregs.fprs, 128); | |
1963 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), | |
1964 | vcpu->run->s.regs.gprs, 128); | |
1965 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), | |
1966 | &vcpu->arch.sie_block->gpsw, 16); | |
fda902cb | 1967 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 | 1968 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
fda902cb | 1969 | &px, 4); |
d0bce605 HC |
1970 | rc |= write_guest_abs(vcpu, |
1971 | gpa + offsetof(struct save_area, fp_ctrl_reg), | |
1972 | &vcpu->arch.guest_fpregs.fpc, 4); | |
1973 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), | |
1974 | &vcpu->arch.sie_block->todpr, 4); | |
1975 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), | |
1976 | &vcpu->arch.sie_block->cputm, 8); | |
178bd789 | 1977 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d0bce605 HC |
1978 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
1979 | &clkcomp, 8); | |
1980 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), | |
1981 | &vcpu->run->s.regs.acrs, 64); | |
1982 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), | |
1983 | &vcpu->arch.sie_block->gcr, 128); | |
1984 | return rc ? -EFAULT : 0; | |
b0c632db HC |
1985 | } |
1986 | ||
e879892c TH |
1987 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
1988 | { | |
1989 | /* | |
1990 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
1991 | * copying in vcpu load/put. Lets update our copies before we save | |
1992 | * it into the save area | |
1993 | */ | |
1994 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1995 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1996 | save_access_regs(vcpu->run->s.regs.acrs); | |
1997 | ||
1998 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
1999 | } | |
2000 | ||
8ad35755 DH |
2001 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2002 | { | |
2003 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
2004 | kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu); | |
2005 | exit_sie_sync(vcpu); | |
2006 | } | |
2007 | ||
2008 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2009 | { | |
2010 | unsigned int i; | |
2011 | struct kvm_vcpu *vcpu; | |
2012 | ||
2013 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2014 | __disable_ibs_on_vcpu(vcpu); | |
2015 | } | |
2016 | } | |
2017 | ||
2018 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2019 | { | |
2020 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
2021 | kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu); | |
2022 | exit_sie_sync(vcpu); | |
2023 | } | |
2024 | ||
6852d7b6 DH |
2025 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2026 | { | |
8ad35755 DH |
2027 | int i, online_vcpus, started_vcpus = 0; |
2028 | ||
2029 | if (!is_vcpu_stopped(vcpu)) | |
2030 | return; | |
2031 | ||
6852d7b6 | 2032 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2033 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2034 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2035 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2036 | ||
2037 | for (i = 0; i < online_vcpus; i++) { | |
2038 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2039 | started_vcpus++; | |
2040 | } | |
2041 | ||
2042 | if (started_vcpus == 0) { | |
2043 | /* we're the only active VCPU -> speed it up */ | |
2044 | __enable_ibs_on_vcpu(vcpu); | |
2045 | } else if (started_vcpus == 1) { | |
2046 | /* | |
2047 | * As we are starting a second VCPU, we have to disable | |
2048 | * the IBS facility on all VCPUs to remove potentially | |
2049 | * oustanding ENABLE requests. | |
2050 | */ | |
2051 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2052 | } | |
2053 | ||
6852d7b6 | 2054 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2055 | /* |
2056 | * Another VCPU might have used IBS while we were offline. | |
2057 | * Let's play safe and flush the VCPU at startup. | |
2058 | */ | |
d3d692c8 | 2059 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2060 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2061 | return; |
6852d7b6 DH |
2062 | } |
2063 | ||
2064 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2065 | { | |
8ad35755 DH |
2066 | int i, online_vcpus, started_vcpus = 0; |
2067 | struct kvm_vcpu *started_vcpu = NULL; | |
2068 | ||
2069 | if (is_vcpu_stopped(vcpu)) | |
2070 | return; | |
2071 | ||
6852d7b6 | 2072 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2073 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2074 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2075 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2076 | ||
32f5ff63 | 2077 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 2078 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 2079 | |
6cddd432 | 2080 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2081 | __disable_ibs_on_vcpu(vcpu); |
2082 | ||
2083 | for (i = 0; i < online_vcpus; i++) { | |
2084 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
2085 | started_vcpus++; | |
2086 | started_vcpu = vcpu->kvm->vcpus[i]; | |
2087 | } | |
2088 | } | |
2089 | ||
2090 | if (started_vcpus == 1) { | |
2091 | /* | |
2092 | * As we only have one VCPU left, we want to enable the | |
2093 | * IBS facility for that VCPU to speed it up. | |
2094 | */ | |
2095 | __enable_ibs_on_vcpu(started_vcpu); | |
2096 | } | |
2097 | ||
433b9ee4 | 2098 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2099 | return; |
6852d7b6 DH |
2100 | } |
2101 | ||
d6712df9 CH |
2102 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
2103 | struct kvm_enable_cap *cap) | |
2104 | { | |
2105 | int r; | |
2106 | ||
2107 | if (cap->flags) | |
2108 | return -EINVAL; | |
2109 | ||
2110 | switch (cap->cap) { | |
fa6b7fe9 CH |
2111 | case KVM_CAP_S390_CSS_SUPPORT: |
2112 | if (!vcpu->kvm->arch.css_support) { | |
2113 | vcpu->kvm->arch.css_support = 1; | |
2114 | trace_kvm_s390_enable_css(vcpu->kvm); | |
2115 | } | |
2116 | r = 0; | |
2117 | break; | |
d6712df9 CH |
2118 | default: |
2119 | r = -EINVAL; | |
2120 | break; | |
2121 | } | |
2122 | return r; | |
2123 | } | |
2124 | ||
b0c632db HC |
2125 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2126 | unsigned int ioctl, unsigned long arg) | |
2127 | { | |
2128 | struct kvm_vcpu *vcpu = filp->private_data; | |
2129 | void __user *argp = (void __user *)arg; | |
800c1065 | 2130 | int idx; |
bc923cc9 | 2131 | long r; |
b0c632db | 2132 | |
93736624 AK |
2133 | switch (ioctl) { |
2134 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b | 2135 | struct kvm_s390_interrupt s390int; |
383d0b05 | 2136 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 2137 | |
93736624 | 2138 | r = -EFAULT; |
ba5c1e9b | 2139 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 2140 | break; |
383d0b05 JF |
2141 | if (s390int_to_s390irq(&s390int, &s390irq)) |
2142 | return -EINVAL; | |
2143 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 2144 | break; |
ba5c1e9b | 2145 | } |
b0c632db | 2146 | case KVM_S390_STORE_STATUS: |
800c1065 | 2147 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 2148 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 2149 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 2150 | break; |
b0c632db HC |
2151 | case KVM_S390_SET_INITIAL_PSW: { |
2152 | psw_t psw; | |
2153 | ||
bc923cc9 | 2154 | r = -EFAULT; |
b0c632db | 2155 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
2156 | break; |
2157 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
2158 | break; | |
b0c632db HC |
2159 | } |
2160 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
2161 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
2162 | break; | |
14eebd91 CO |
2163 | case KVM_SET_ONE_REG: |
2164 | case KVM_GET_ONE_REG: { | |
2165 | struct kvm_one_reg reg; | |
2166 | r = -EFAULT; | |
2167 | if (copy_from_user(®, argp, sizeof(reg))) | |
2168 | break; | |
2169 | if (ioctl == KVM_SET_ONE_REG) | |
2170 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
2171 | else | |
2172 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
2173 | break; | |
2174 | } | |
27e0393f CO |
2175 | #ifdef CONFIG_KVM_S390_UCONTROL |
2176 | case KVM_S390_UCAS_MAP: { | |
2177 | struct kvm_s390_ucas_mapping ucasmap; | |
2178 | ||
2179 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2180 | r = -EFAULT; | |
2181 | break; | |
2182 | } | |
2183 | ||
2184 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2185 | r = -EINVAL; | |
2186 | break; | |
2187 | } | |
2188 | ||
2189 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
2190 | ucasmap.vcpu_addr, ucasmap.length); | |
2191 | break; | |
2192 | } | |
2193 | case KVM_S390_UCAS_UNMAP: { | |
2194 | struct kvm_s390_ucas_mapping ucasmap; | |
2195 | ||
2196 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2197 | r = -EFAULT; | |
2198 | break; | |
2199 | } | |
2200 | ||
2201 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2202 | r = -EINVAL; | |
2203 | break; | |
2204 | } | |
2205 | ||
2206 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
2207 | ucasmap.length); | |
2208 | break; | |
2209 | } | |
2210 | #endif | |
ccc7910f | 2211 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 2212 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
2213 | break; |
2214 | } | |
d6712df9 CH |
2215 | case KVM_ENABLE_CAP: |
2216 | { | |
2217 | struct kvm_enable_cap cap; | |
2218 | r = -EFAULT; | |
2219 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
2220 | break; | |
2221 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
2222 | break; | |
2223 | } | |
b0c632db | 2224 | default: |
3e6afcf1 | 2225 | r = -ENOTTY; |
b0c632db | 2226 | } |
bc923cc9 | 2227 | return r; |
b0c632db HC |
2228 | } |
2229 | ||
5b1c1493 CO |
2230 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
2231 | { | |
2232 | #ifdef CONFIG_KVM_S390_UCONTROL | |
2233 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
2234 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
2235 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
2236 | get_page(vmf->page); | |
2237 | return 0; | |
2238 | } | |
2239 | #endif | |
2240 | return VM_FAULT_SIGBUS; | |
2241 | } | |
2242 | ||
5587027c AK |
2243 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
2244 | unsigned long npages) | |
db3fe4eb TY |
2245 | { |
2246 | return 0; | |
2247 | } | |
2248 | ||
b0c632db | 2249 | /* Section: memory related */ |
f7784b8e MT |
2250 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
2251 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
2252 | struct kvm_userspace_memory_region *mem, |
2253 | enum kvm_mr_change change) | |
b0c632db | 2254 | { |
dd2887e7 NW |
2255 | /* A few sanity checks. We can have memory slots which have to be |
2256 | located/ended at a segment boundary (1MB). The memory in userland is | |
2257 | ok to be fragmented into various different vmas. It is okay to mmap() | |
2258 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 2259 | |
598841ca | 2260 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
2261 | return -EINVAL; |
2262 | ||
598841ca | 2263 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
2264 | return -EINVAL; |
2265 | ||
f7784b8e MT |
2266 | return 0; |
2267 | } | |
2268 | ||
2269 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
2270 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
2271 | const struct kvm_memory_slot *old, |
2272 | enum kvm_mr_change change) | |
f7784b8e | 2273 | { |
f7850c92 | 2274 | int rc; |
f7784b8e | 2275 | |
2cef4deb CB |
2276 | /* If the basics of the memslot do not change, we do not want |
2277 | * to update the gmap. Every update causes several unnecessary | |
2278 | * segment translation exceptions. This is usually handled just | |
2279 | * fine by the normal fault handler + gmap, but it will also | |
2280 | * cause faults on the prefix page of running guest CPUs. | |
2281 | */ | |
2282 | if (old->userspace_addr == mem->userspace_addr && | |
2283 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
2284 | old->npages * PAGE_SIZE == mem->memory_size) | |
2285 | return; | |
598841ca CO |
2286 | |
2287 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
2288 | mem->guest_phys_addr, mem->memory_size); | |
2289 | if (rc) | |
f7850c92 | 2290 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 2291 | return; |
b0c632db HC |
2292 | } |
2293 | ||
b0c632db HC |
2294 | static int __init kvm_s390_init(void) |
2295 | { | |
9d8d5786 | 2296 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
2297 | } |
2298 | ||
2299 | static void __exit kvm_s390_exit(void) | |
2300 | { | |
2301 | kvm_exit(); | |
2302 | } | |
2303 | ||
2304 | module_init(kvm_s390_init); | |
2305 | module_exit(kvm_s390_exit); | |
566af940 CH |
2306 | |
2307 | /* | |
2308 | * Enable autoloading of the kvm module. | |
2309 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
2310 | * since x86 takes a different approach. | |
2311 | */ | |
2312 | #include <linux/miscdevice.h> | |
2313 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
2314 | MODULE_ALIAS("devname:kvm"); |