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> |
41408c28 | 28 | #include <linux/vmalloc.h> |
cbb870c8 | 29 | #include <asm/asm-offsets.h> |
b0c632db HC |
30 | #include <asm/lowcore.h> |
31 | #include <asm/pgtable.h> | |
f5daba1d | 32 | #include <asm/nmi.h> |
a0616cde | 33 | #include <asm/switch_to.h> |
1526bf9c | 34 | #include <asm/sclp.h> |
8f2abe6a | 35 | #include "kvm-s390.h" |
b0c632db HC |
36 | #include "gaccess.h" |
37 | ||
5786fffa CH |
38 | #define CREATE_TRACE_POINTS |
39 | #include "trace.h" | |
ade38c31 | 40 | #include "trace-s390.h" |
5786fffa | 41 | |
41408c28 TH |
42 | #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
43 | ||
b0c632db HC |
44 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
45 | ||
46 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
47 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 48 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
49 | { "exit_validity", VCPU_STAT(exit_validity) }, |
50 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
51 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
52 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
53 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
54 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
55 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f7819512 | 56 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
ce2e4f0b | 57 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 58 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 59 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
60 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
61 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 62 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 63 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
64 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
65 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
66 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
67 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
68 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
69 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
70 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 71 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
72 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
73 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
74 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
75 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
76 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 77 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
78 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
79 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 80 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
81 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
82 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 83 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 84 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 85 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 86 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 87 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
88 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
89 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 90 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
91 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
92 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
cd7b4b61 | 93 | { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) }, |
5288fbf0 CB |
94 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
95 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
96 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
97 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
98 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
99 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 100 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 101 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 102 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
103 | { NULL } |
104 | }; | |
105 | ||
9d8d5786 MM |
106 | /* upper facilities limit for kvm */ |
107 | unsigned long kvm_s390_fac_list_mask[] = { | |
a3ed8dae CB |
108 | 0xffe6fffbfcfdfc40UL, |
109 | 0x205c800000000000UL, | |
9d8d5786 | 110 | }; |
b0c632db | 111 | |
9d8d5786 | 112 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 113 | { |
9d8d5786 MM |
114 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
115 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
116 | } |
117 | ||
9d8d5786 MM |
118 | static struct gmap_notifier gmap_notifier; |
119 | ||
b0c632db | 120 | /* Section: not file related */ |
13a34e06 | 121 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
122 | { |
123 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 124 | return 0; |
b0c632db HC |
125 | } |
126 | ||
2c70fe44 CB |
127 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
128 | ||
b0c632db HC |
129 | int kvm_arch_hardware_setup(void) |
130 | { | |
2c70fe44 CB |
131 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
132 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
133 | return 0; |
134 | } | |
135 | ||
136 | void kvm_arch_hardware_unsetup(void) | |
137 | { | |
2c70fe44 | 138 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
139 | } |
140 | ||
b0c632db HC |
141 | int kvm_arch_init(void *opaque) |
142 | { | |
84877d93 CH |
143 | /* Register floating interrupt controller interface. */ |
144 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
145 | } |
146 | ||
b0c632db HC |
147 | /* Section: device related */ |
148 | long kvm_arch_dev_ioctl(struct file *filp, | |
149 | unsigned int ioctl, unsigned long arg) | |
150 | { | |
151 | if (ioctl == KVM_S390_ENABLE_SIE) | |
152 | return s390_enable_sie(); | |
153 | return -EINVAL; | |
154 | } | |
155 | ||
784aa3d7 | 156 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 157 | { |
d7b0b5eb CO |
158 | int r; |
159 | ||
2bd0ac4e | 160 | switch (ext) { |
d7b0b5eb | 161 | case KVM_CAP_S390_PSW: |
b6cf8788 | 162 | case KVM_CAP_S390_GMAP: |
52e16b18 | 163 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
164 | #ifdef CONFIG_KVM_S390_UCONTROL |
165 | case KVM_CAP_S390_UCONTROL: | |
166 | #endif | |
3c038e6b | 167 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 168 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 169 | case KVM_CAP_ONE_REG: |
d6712df9 | 170 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 171 | case KVM_CAP_S390_CSS_SUPPORT: |
ebc32262 | 172 | case KVM_CAP_IRQFD: |
10ccaa1e | 173 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 174 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 175 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 176 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 177 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 178 | case KVM_CAP_MP_STATE: |
2444b352 | 179 | case KVM_CAP_S390_USER_SIGP: |
e44fc8c9 | 180 | case KVM_CAP_S390_USER_STSI: |
30ee2a98 | 181 | case KVM_CAP_S390_SKEYS: |
d7b0b5eb CO |
182 | r = 1; |
183 | break; | |
41408c28 TH |
184 | case KVM_CAP_S390_MEM_OP: |
185 | r = MEM_OP_MAX_SIZE; | |
186 | break; | |
e726b1bd CB |
187 | case KVM_CAP_NR_VCPUS: |
188 | case KVM_CAP_MAX_VCPUS: | |
189 | r = KVM_MAX_VCPUS; | |
190 | break; | |
e1e2e605 NW |
191 | case KVM_CAP_NR_MEMSLOTS: |
192 | r = KVM_USER_MEM_SLOTS; | |
193 | break; | |
1526bf9c | 194 | case KVM_CAP_S390_COW: |
abf09bed | 195 | r = MACHINE_HAS_ESOP; |
1526bf9c | 196 | break; |
68c55750 EF |
197 | case KVM_CAP_S390_VECTOR_REGISTERS: |
198 | r = MACHINE_HAS_VX; | |
199 | break; | |
2bd0ac4e | 200 | default: |
d7b0b5eb | 201 | r = 0; |
2bd0ac4e | 202 | } |
d7b0b5eb | 203 | return r; |
b0c632db HC |
204 | } |
205 | ||
15f36ebd JH |
206 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
207 | struct kvm_memory_slot *memslot) | |
208 | { | |
209 | gfn_t cur_gfn, last_gfn; | |
210 | unsigned long address; | |
211 | struct gmap *gmap = kvm->arch.gmap; | |
212 | ||
213 | down_read(&gmap->mm->mmap_sem); | |
214 | /* Loop over all guest pages */ | |
215 | last_gfn = memslot->base_gfn + memslot->npages; | |
216 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
217 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
218 | ||
219 | if (gmap_test_and_clear_dirty(address, gmap)) | |
220 | mark_page_dirty(kvm, cur_gfn); | |
221 | } | |
222 | up_read(&gmap->mm->mmap_sem); | |
223 | } | |
224 | ||
b0c632db HC |
225 | /* Section: vm related */ |
226 | /* | |
227 | * Get (and clear) the dirty memory log for a memory slot. | |
228 | */ | |
229 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
230 | struct kvm_dirty_log *log) | |
231 | { | |
15f36ebd JH |
232 | int r; |
233 | unsigned long n; | |
234 | struct kvm_memory_slot *memslot; | |
235 | int is_dirty = 0; | |
236 | ||
237 | mutex_lock(&kvm->slots_lock); | |
238 | ||
239 | r = -EINVAL; | |
240 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
241 | goto out; | |
242 | ||
243 | memslot = id_to_memslot(kvm->memslots, log->slot); | |
244 | r = -ENOENT; | |
245 | if (!memslot->dirty_bitmap) | |
246 | goto out; | |
247 | ||
248 | kvm_s390_sync_dirty_log(kvm, memslot); | |
249 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
250 | if (r) | |
251 | goto out; | |
252 | ||
253 | /* Clear the dirty log */ | |
254 | if (is_dirty) { | |
255 | n = kvm_dirty_bitmap_bytes(memslot); | |
256 | memset(memslot->dirty_bitmap, 0, n); | |
257 | } | |
258 | r = 0; | |
259 | out: | |
260 | mutex_unlock(&kvm->slots_lock); | |
261 | return r; | |
b0c632db HC |
262 | } |
263 | ||
d938dc55 CH |
264 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
265 | { | |
266 | int r; | |
267 | ||
268 | if (cap->flags) | |
269 | return -EINVAL; | |
270 | ||
271 | switch (cap->cap) { | |
84223598 CH |
272 | case KVM_CAP_S390_IRQCHIP: |
273 | kvm->arch.use_irqchip = 1; | |
274 | r = 0; | |
275 | break; | |
2444b352 DH |
276 | case KVM_CAP_S390_USER_SIGP: |
277 | kvm->arch.user_sigp = 1; | |
278 | r = 0; | |
279 | break; | |
68c55750 | 280 | case KVM_CAP_S390_VECTOR_REGISTERS: |
18280d8b MM |
281 | if (MACHINE_HAS_VX) { |
282 | set_kvm_facility(kvm->arch.model.fac->mask, 129); | |
283 | set_kvm_facility(kvm->arch.model.fac->list, 129); | |
284 | r = 0; | |
285 | } else | |
286 | r = -EINVAL; | |
68c55750 | 287 | break; |
e44fc8c9 ET |
288 | case KVM_CAP_S390_USER_STSI: |
289 | kvm->arch.user_stsi = 1; | |
290 | r = 0; | |
291 | break; | |
d938dc55 CH |
292 | default: |
293 | r = -EINVAL; | |
294 | break; | |
295 | } | |
296 | return r; | |
297 | } | |
298 | ||
8c0a7ce6 DD |
299 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
300 | { | |
301 | int ret; | |
302 | ||
303 | switch (attr->attr) { | |
304 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
305 | ret = 0; | |
306 | if (put_user(kvm->arch.gmap->asce_end, (u64 __user *)attr->addr)) | |
307 | ret = -EFAULT; | |
308 | break; | |
309 | default: | |
310 | ret = -ENXIO; | |
311 | break; | |
312 | } | |
313 | return ret; | |
314 | } | |
315 | ||
316 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
317 | { |
318 | int ret; | |
319 | unsigned int idx; | |
320 | switch (attr->attr) { | |
321 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
322 | ret = -EBUSY; | |
323 | mutex_lock(&kvm->lock); | |
324 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
325 | kvm->arch.use_cmma = 1; | |
326 | ret = 0; | |
327 | } | |
328 | mutex_unlock(&kvm->lock); | |
329 | break; | |
330 | case KVM_S390_VM_MEM_CLR_CMMA: | |
331 | mutex_lock(&kvm->lock); | |
332 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 333 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
334 | srcu_read_unlock(&kvm->srcu, idx); |
335 | mutex_unlock(&kvm->lock); | |
336 | ret = 0; | |
337 | break; | |
8c0a7ce6 DD |
338 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
339 | unsigned long new_limit; | |
340 | ||
341 | if (kvm_is_ucontrol(kvm)) | |
342 | return -EINVAL; | |
343 | ||
344 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
345 | return -EFAULT; | |
346 | ||
347 | if (new_limit > kvm->arch.gmap->asce_end) | |
348 | return -E2BIG; | |
349 | ||
350 | ret = -EBUSY; | |
351 | mutex_lock(&kvm->lock); | |
352 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
353 | /* gmap_alloc will round the limit up */ | |
354 | struct gmap *new = gmap_alloc(current->mm, new_limit); | |
355 | ||
356 | if (!new) { | |
357 | ret = -ENOMEM; | |
358 | } else { | |
359 | gmap_free(kvm->arch.gmap); | |
360 | new->private = kvm; | |
361 | kvm->arch.gmap = new; | |
362 | ret = 0; | |
363 | } | |
364 | } | |
365 | mutex_unlock(&kvm->lock); | |
366 | break; | |
367 | } | |
4f718eab DD |
368 | default: |
369 | ret = -ENXIO; | |
370 | break; | |
371 | } | |
372 | return ret; | |
373 | } | |
374 | ||
a374e892 TK |
375 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
376 | ||
377 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
378 | { | |
379 | struct kvm_vcpu *vcpu; | |
380 | int i; | |
381 | ||
9d8d5786 | 382 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
383 | return -EINVAL; |
384 | ||
385 | mutex_lock(&kvm->lock); | |
386 | switch (attr->attr) { | |
387 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
388 | get_random_bytes( | |
389 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
390 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
391 | kvm->arch.crypto.aes_kw = 1; | |
392 | break; | |
393 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
394 | get_random_bytes( | |
395 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
396 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
397 | kvm->arch.crypto.dea_kw = 1; | |
398 | break; | |
399 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
400 | kvm->arch.crypto.aes_kw = 0; | |
401 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
402 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
403 | break; | |
404 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
405 | kvm->arch.crypto.dea_kw = 0; | |
406 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
407 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
408 | break; | |
409 | default: | |
410 | mutex_unlock(&kvm->lock); | |
411 | return -ENXIO; | |
412 | } | |
413 | ||
414 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
415 | kvm_s390_vcpu_crypto_setup(vcpu); | |
416 | exit_sie(vcpu); | |
417 | } | |
418 | mutex_unlock(&kvm->lock); | |
419 | return 0; | |
420 | } | |
421 | ||
72f25020 JH |
422 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
423 | { | |
424 | u8 gtod_high; | |
425 | ||
426 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
427 | sizeof(gtod_high))) | |
428 | return -EFAULT; | |
429 | ||
430 | if (gtod_high != 0) | |
431 | return -EINVAL; | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
437 | { | |
438 | struct kvm_vcpu *cur_vcpu; | |
439 | unsigned int vcpu_idx; | |
440 | u64 host_tod, gtod; | |
441 | int r; | |
442 | ||
443 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
444 | return -EFAULT; | |
445 | ||
446 | r = store_tod_clock(&host_tod); | |
447 | if (r) | |
448 | return r; | |
449 | ||
450 | mutex_lock(&kvm->lock); | |
451 | kvm->arch.epoch = gtod - host_tod; | |
452 | kvm_for_each_vcpu(vcpu_idx, cur_vcpu, kvm) { | |
453 | cur_vcpu->arch.sie_block->epoch = kvm->arch.epoch; | |
454 | exit_sie(cur_vcpu); | |
455 | } | |
456 | mutex_unlock(&kvm->lock); | |
457 | return 0; | |
458 | } | |
459 | ||
460 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
461 | { | |
462 | int ret; | |
463 | ||
464 | if (attr->flags) | |
465 | return -EINVAL; | |
466 | ||
467 | switch (attr->attr) { | |
468 | case KVM_S390_VM_TOD_HIGH: | |
469 | ret = kvm_s390_set_tod_high(kvm, attr); | |
470 | break; | |
471 | case KVM_S390_VM_TOD_LOW: | |
472 | ret = kvm_s390_set_tod_low(kvm, attr); | |
473 | break; | |
474 | default: | |
475 | ret = -ENXIO; | |
476 | break; | |
477 | } | |
478 | return ret; | |
479 | } | |
480 | ||
481 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
482 | { | |
483 | u8 gtod_high = 0; | |
484 | ||
485 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
486 | sizeof(gtod_high))) | |
487 | return -EFAULT; | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
492 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
493 | { | |
494 | u64 host_tod, gtod; | |
495 | int r; | |
496 | ||
497 | r = store_tod_clock(&host_tod); | |
498 | if (r) | |
499 | return r; | |
500 | ||
501 | gtod = host_tod + kvm->arch.epoch; | |
502 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) | |
503 | return -EFAULT; | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
509 | { | |
510 | int ret; | |
511 | ||
512 | if (attr->flags) | |
513 | return -EINVAL; | |
514 | ||
515 | switch (attr->attr) { | |
516 | case KVM_S390_VM_TOD_HIGH: | |
517 | ret = kvm_s390_get_tod_high(kvm, attr); | |
518 | break; | |
519 | case KVM_S390_VM_TOD_LOW: | |
520 | ret = kvm_s390_get_tod_low(kvm, attr); | |
521 | break; | |
522 | default: | |
523 | ret = -ENXIO; | |
524 | break; | |
525 | } | |
526 | return ret; | |
527 | } | |
528 | ||
658b6eda MM |
529 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
530 | { | |
531 | struct kvm_s390_vm_cpu_processor *proc; | |
532 | int ret = 0; | |
533 | ||
534 | mutex_lock(&kvm->lock); | |
535 | if (atomic_read(&kvm->online_vcpus)) { | |
536 | ret = -EBUSY; | |
537 | goto out; | |
538 | } | |
539 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
540 | if (!proc) { | |
541 | ret = -ENOMEM; | |
542 | goto out; | |
543 | } | |
544 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
545 | sizeof(*proc))) { | |
546 | memcpy(&kvm->arch.model.cpu_id, &proc->cpuid, | |
547 | sizeof(struct cpuid)); | |
548 | kvm->arch.model.ibc = proc->ibc; | |
981467c9 | 549 | memcpy(kvm->arch.model.fac->list, proc->fac_list, |
658b6eda MM |
550 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
551 | } else | |
552 | ret = -EFAULT; | |
553 | kfree(proc); | |
554 | out: | |
555 | mutex_unlock(&kvm->lock); | |
556 | return ret; | |
557 | } | |
558 | ||
559 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
560 | { | |
561 | int ret = -ENXIO; | |
562 | ||
563 | switch (attr->attr) { | |
564 | case KVM_S390_VM_CPU_PROCESSOR: | |
565 | ret = kvm_s390_set_processor(kvm, attr); | |
566 | break; | |
567 | } | |
568 | return ret; | |
569 | } | |
570 | ||
571 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
572 | { | |
573 | struct kvm_s390_vm_cpu_processor *proc; | |
574 | int ret = 0; | |
575 | ||
576 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
577 | if (!proc) { | |
578 | ret = -ENOMEM; | |
579 | goto out; | |
580 | } | |
581 | memcpy(&proc->cpuid, &kvm->arch.model.cpu_id, sizeof(struct cpuid)); | |
582 | proc->ibc = kvm->arch.model.ibc; | |
981467c9 | 583 | memcpy(&proc->fac_list, kvm->arch.model.fac->list, S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
584 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
585 | ret = -EFAULT; | |
586 | kfree(proc); | |
587 | out: | |
588 | return ret; | |
589 | } | |
590 | ||
591 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
592 | { | |
593 | struct kvm_s390_vm_cpu_machine *mach; | |
594 | int ret = 0; | |
595 | ||
596 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
597 | if (!mach) { | |
598 | ret = -ENOMEM; | |
599 | goto out; | |
600 | } | |
601 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
602 | mach->ibc = sclp_get_ibc(); | |
981467c9 MM |
603 | memcpy(&mach->fac_mask, kvm->arch.model.fac->mask, |
604 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
658b6eda | 605 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
94422ee8 | 606 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
607 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
608 | ret = -EFAULT; | |
609 | kfree(mach); | |
610 | out: | |
611 | return ret; | |
612 | } | |
613 | ||
614 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
615 | { | |
616 | int ret = -ENXIO; | |
617 | ||
618 | switch (attr->attr) { | |
619 | case KVM_S390_VM_CPU_PROCESSOR: | |
620 | ret = kvm_s390_get_processor(kvm, attr); | |
621 | break; | |
622 | case KVM_S390_VM_CPU_MACHINE: | |
623 | ret = kvm_s390_get_machine(kvm, attr); | |
624 | break; | |
625 | } | |
626 | return ret; | |
627 | } | |
628 | ||
f2061656 DD |
629 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
630 | { | |
631 | int ret; | |
632 | ||
633 | switch (attr->group) { | |
4f718eab | 634 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 635 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 636 | break; |
72f25020 JH |
637 | case KVM_S390_VM_TOD: |
638 | ret = kvm_s390_set_tod(kvm, attr); | |
639 | break; | |
658b6eda MM |
640 | case KVM_S390_VM_CPU_MODEL: |
641 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
642 | break; | |
a374e892 TK |
643 | case KVM_S390_VM_CRYPTO: |
644 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
645 | break; | |
f2061656 DD |
646 | default: |
647 | ret = -ENXIO; | |
648 | break; | |
649 | } | |
650 | ||
651 | return ret; | |
652 | } | |
653 | ||
654 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
655 | { | |
8c0a7ce6 DD |
656 | int ret; |
657 | ||
658 | switch (attr->group) { | |
659 | case KVM_S390_VM_MEM_CTRL: | |
660 | ret = kvm_s390_get_mem_control(kvm, attr); | |
661 | break; | |
72f25020 JH |
662 | case KVM_S390_VM_TOD: |
663 | ret = kvm_s390_get_tod(kvm, attr); | |
664 | break; | |
658b6eda MM |
665 | case KVM_S390_VM_CPU_MODEL: |
666 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
667 | break; | |
8c0a7ce6 DD |
668 | default: |
669 | ret = -ENXIO; | |
670 | break; | |
671 | } | |
672 | ||
673 | return ret; | |
f2061656 DD |
674 | } |
675 | ||
676 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
677 | { | |
678 | int ret; | |
679 | ||
680 | switch (attr->group) { | |
4f718eab DD |
681 | case KVM_S390_VM_MEM_CTRL: |
682 | switch (attr->attr) { | |
683 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
684 | case KVM_S390_VM_MEM_CLR_CMMA: | |
8c0a7ce6 | 685 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
686 | ret = 0; |
687 | break; | |
688 | default: | |
689 | ret = -ENXIO; | |
690 | break; | |
691 | } | |
692 | break; | |
72f25020 JH |
693 | case KVM_S390_VM_TOD: |
694 | switch (attr->attr) { | |
695 | case KVM_S390_VM_TOD_LOW: | |
696 | case KVM_S390_VM_TOD_HIGH: | |
697 | ret = 0; | |
698 | break; | |
699 | default: | |
700 | ret = -ENXIO; | |
701 | break; | |
702 | } | |
703 | break; | |
658b6eda MM |
704 | case KVM_S390_VM_CPU_MODEL: |
705 | switch (attr->attr) { | |
706 | case KVM_S390_VM_CPU_PROCESSOR: | |
707 | case KVM_S390_VM_CPU_MACHINE: | |
708 | ret = 0; | |
709 | break; | |
710 | default: | |
711 | ret = -ENXIO; | |
712 | break; | |
713 | } | |
714 | break; | |
a374e892 TK |
715 | case KVM_S390_VM_CRYPTO: |
716 | switch (attr->attr) { | |
717 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
718 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
719 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
720 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
721 | ret = 0; | |
722 | break; | |
723 | default: | |
724 | ret = -ENXIO; | |
725 | break; | |
726 | } | |
727 | break; | |
f2061656 DD |
728 | default: |
729 | ret = -ENXIO; | |
730 | break; | |
731 | } | |
732 | ||
733 | return ret; | |
734 | } | |
735 | ||
30ee2a98 JH |
736 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
737 | { | |
738 | uint8_t *keys; | |
739 | uint64_t hva; | |
740 | unsigned long curkey; | |
741 | int i, r = 0; | |
742 | ||
743 | if (args->flags != 0) | |
744 | return -EINVAL; | |
745 | ||
746 | /* Is this guest using storage keys? */ | |
747 | if (!mm_use_skey(current->mm)) | |
748 | return KVM_S390_GET_SKEYS_NONE; | |
749 | ||
750 | /* Enforce sane limit on memory allocation */ | |
751 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
752 | return -EINVAL; | |
753 | ||
754 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
755 | GFP_KERNEL | __GFP_NOWARN); | |
756 | if (!keys) | |
757 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
758 | if (!keys) | |
759 | return -ENOMEM; | |
760 | ||
761 | for (i = 0; i < args->count; i++) { | |
762 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
763 | if (kvm_is_error_hva(hva)) { | |
764 | r = -EFAULT; | |
765 | goto out; | |
766 | } | |
767 | ||
768 | curkey = get_guest_storage_key(current->mm, hva); | |
769 | if (IS_ERR_VALUE(curkey)) { | |
770 | r = curkey; | |
771 | goto out; | |
772 | } | |
773 | keys[i] = curkey; | |
774 | } | |
775 | ||
776 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
777 | sizeof(uint8_t) * args->count); | |
778 | if (r) | |
779 | r = -EFAULT; | |
780 | out: | |
781 | kvfree(keys); | |
782 | return r; | |
783 | } | |
784 | ||
785 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
786 | { | |
787 | uint8_t *keys; | |
788 | uint64_t hva; | |
789 | int i, r = 0; | |
790 | ||
791 | if (args->flags != 0) | |
792 | return -EINVAL; | |
793 | ||
794 | /* Enforce sane limit on memory allocation */ | |
795 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
796 | return -EINVAL; | |
797 | ||
798 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
799 | GFP_KERNEL | __GFP_NOWARN); | |
800 | if (!keys) | |
801 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
802 | if (!keys) | |
803 | return -ENOMEM; | |
804 | ||
805 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
806 | sizeof(uint8_t) * args->count); | |
807 | if (r) { | |
808 | r = -EFAULT; | |
809 | goto out; | |
810 | } | |
811 | ||
812 | /* Enable storage key handling for the guest */ | |
813 | s390_enable_skey(); | |
814 | ||
815 | for (i = 0; i < args->count; i++) { | |
816 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
817 | if (kvm_is_error_hva(hva)) { | |
818 | r = -EFAULT; | |
819 | goto out; | |
820 | } | |
821 | ||
822 | /* Lowest order bit is reserved */ | |
823 | if (keys[i] & 0x01) { | |
824 | r = -EINVAL; | |
825 | goto out; | |
826 | } | |
827 | ||
828 | r = set_guest_storage_key(current->mm, hva, | |
829 | (unsigned long)keys[i], 0); | |
830 | if (r) | |
831 | goto out; | |
832 | } | |
833 | out: | |
834 | kvfree(keys); | |
835 | return r; | |
836 | } | |
837 | ||
b0c632db HC |
838 | long kvm_arch_vm_ioctl(struct file *filp, |
839 | unsigned int ioctl, unsigned long arg) | |
840 | { | |
841 | struct kvm *kvm = filp->private_data; | |
842 | void __user *argp = (void __user *)arg; | |
f2061656 | 843 | struct kvm_device_attr attr; |
b0c632db HC |
844 | int r; |
845 | ||
846 | switch (ioctl) { | |
ba5c1e9b CO |
847 | case KVM_S390_INTERRUPT: { |
848 | struct kvm_s390_interrupt s390int; | |
849 | ||
850 | r = -EFAULT; | |
851 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
852 | break; | |
853 | r = kvm_s390_inject_vm(kvm, &s390int); | |
854 | break; | |
855 | } | |
d938dc55 CH |
856 | case KVM_ENABLE_CAP: { |
857 | struct kvm_enable_cap cap; | |
858 | r = -EFAULT; | |
859 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
860 | break; | |
861 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
862 | break; | |
863 | } | |
84223598 CH |
864 | case KVM_CREATE_IRQCHIP: { |
865 | struct kvm_irq_routing_entry routing; | |
866 | ||
867 | r = -EINVAL; | |
868 | if (kvm->arch.use_irqchip) { | |
869 | /* Set up dummy routing. */ | |
870 | memset(&routing, 0, sizeof(routing)); | |
871 | kvm_set_irq_routing(kvm, &routing, 0, 0); | |
872 | r = 0; | |
873 | } | |
874 | break; | |
875 | } | |
f2061656 DD |
876 | case KVM_SET_DEVICE_ATTR: { |
877 | r = -EFAULT; | |
878 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
879 | break; | |
880 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
881 | break; | |
882 | } | |
883 | case KVM_GET_DEVICE_ATTR: { | |
884 | r = -EFAULT; | |
885 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
886 | break; | |
887 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
888 | break; | |
889 | } | |
890 | case KVM_HAS_DEVICE_ATTR: { | |
891 | r = -EFAULT; | |
892 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
893 | break; | |
894 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
895 | break; | |
896 | } | |
30ee2a98 JH |
897 | case KVM_S390_GET_SKEYS: { |
898 | struct kvm_s390_skeys args; | |
899 | ||
900 | r = -EFAULT; | |
901 | if (copy_from_user(&args, argp, | |
902 | sizeof(struct kvm_s390_skeys))) | |
903 | break; | |
904 | r = kvm_s390_get_skeys(kvm, &args); | |
905 | break; | |
906 | } | |
907 | case KVM_S390_SET_SKEYS: { | |
908 | struct kvm_s390_skeys args; | |
909 | ||
910 | r = -EFAULT; | |
911 | if (copy_from_user(&args, argp, | |
912 | sizeof(struct kvm_s390_skeys))) | |
913 | break; | |
914 | r = kvm_s390_set_skeys(kvm, &args); | |
915 | break; | |
916 | } | |
b0c632db | 917 | default: |
367e1319 | 918 | r = -ENOTTY; |
b0c632db HC |
919 | } |
920 | ||
921 | return r; | |
922 | } | |
923 | ||
45c9b47c TK |
924 | static int kvm_s390_query_ap_config(u8 *config) |
925 | { | |
926 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 927 | u32 cc = 0; |
45c9b47c | 928 | |
86044c8c | 929 | memset(config, 0, 128); |
45c9b47c TK |
930 | asm volatile( |
931 | "lgr 0,%1\n" | |
932 | "lgr 2,%2\n" | |
933 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 934 | "0: ipm %0\n" |
45c9b47c | 935 | "srl %0,28\n" |
86044c8c CB |
936 | "1:\n" |
937 | EX_TABLE(0b, 1b) | |
938 | : "+r" (cc) | |
45c9b47c TK |
939 | : "r" (fcn_code), "r" (config) |
940 | : "cc", "0", "2", "memory" | |
941 | ); | |
942 | ||
943 | return cc; | |
944 | } | |
945 | ||
946 | static int kvm_s390_apxa_installed(void) | |
947 | { | |
948 | u8 config[128]; | |
949 | int cc; | |
950 | ||
951 | if (test_facility(2) && test_facility(12)) { | |
952 | cc = kvm_s390_query_ap_config(config); | |
953 | ||
954 | if (cc) | |
955 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
956 | else | |
957 | return config[0] & 0x40; | |
958 | } | |
959 | ||
960 | return 0; | |
961 | } | |
962 | ||
963 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
964 | { | |
965 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
966 | ||
967 | if (kvm_s390_apxa_installed()) | |
968 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
969 | else | |
970 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
971 | } | |
972 | ||
9d8d5786 MM |
973 | static void kvm_s390_get_cpu_id(struct cpuid *cpu_id) |
974 | { | |
975 | get_cpu_id(cpu_id); | |
976 | cpu_id->version = 0xff; | |
977 | } | |
978 | ||
5102ee87 TK |
979 | static int kvm_s390_crypto_init(struct kvm *kvm) |
980 | { | |
9d8d5786 | 981 | if (!test_kvm_facility(kvm, 76)) |
5102ee87 TK |
982 | return 0; |
983 | ||
984 | kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb), | |
985 | GFP_KERNEL | GFP_DMA); | |
986 | if (!kvm->arch.crypto.crycb) | |
987 | return -ENOMEM; | |
988 | ||
45c9b47c | 989 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 990 | |
ed6f76b4 TK |
991 | /* Enable AES/DEA protected key functions by default */ |
992 | kvm->arch.crypto.aes_kw = 1; | |
993 | kvm->arch.crypto.dea_kw = 1; | |
994 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
995 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
996 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
997 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
a374e892 | 998 | |
5102ee87 TK |
999 | return 0; |
1000 | } | |
1001 | ||
e08b9637 | 1002 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1003 | { |
9d8d5786 | 1004 | int i, rc; |
b0c632db | 1005 | char debug_name[16]; |
f6c137ff | 1006 | static unsigned long sca_offset; |
b0c632db | 1007 | |
e08b9637 CO |
1008 | rc = -EINVAL; |
1009 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1010 | if (type & ~KVM_VM_S390_UCONTROL) | |
1011 | goto out_err; | |
1012 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1013 | goto out_err; | |
1014 | #else | |
1015 | if (type) | |
1016 | goto out_err; | |
1017 | #endif | |
1018 | ||
b0c632db HC |
1019 | rc = s390_enable_sie(); |
1020 | if (rc) | |
d89f5eff | 1021 | goto out_err; |
b0c632db | 1022 | |
b290411a CO |
1023 | rc = -ENOMEM; |
1024 | ||
b0c632db HC |
1025 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
1026 | if (!kvm->arch.sca) | |
d89f5eff | 1027 | goto out_err; |
f6c137ff CB |
1028 | spin_lock(&kvm_lock); |
1029 | sca_offset = (sca_offset + 16) & 0x7f0; | |
1030 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); | |
1031 | spin_unlock(&kvm_lock); | |
b0c632db HC |
1032 | |
1033 | sprintf(debug_name, "kvm-%u", current->pid); | |
1034 | ||
1035 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
1036 | if (!kvm->arch.dbf) | |
40f5b735 | 1037 | goto out_err; |
b0c632db | 1038 | |
9d8d5786 MM |
1039 | /* |
1040 | * The architectural maximum amount of facilities is 16 kbit. To store | |
1041 | * this amount, 2 kbyte of memory is required. Thus we need a full | |
981467c9 MM |
1042 | * page to hold the guest facility list (arch.model.fac->list) and the |
1043 | * facility mask (arch.model.fac->mask). Its address size has to be | |
9d8d5786 MM |
1044 | * 31 bits and word aligned. |
1045 | */ | |
1046 | kvm->arch.model.fac = | |
981467c9 | 1047 | (struct kvm_s390_fac *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
9d8d5786 | 1048 | if (!kvm->arch.model.fac) |
40f5b735 | 1049 | goto out_err; |
9d8d5786 | 1050 | |
fb5bf93f | 1051 | /* Populate the facility mask initially. */ |
981467c9 | 1052 | memcpy(kvm->arch.model.fac->mask, S390_lowcore.stfle_fac_list, |
94422ee8 | 1053 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
9d8d5786 MM |
1054 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1055 | if (i < kvm_s390_fac_list_mask_size()) | |
981467c9 | 1056 | kvm->arch.model.fac->mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1057 | else |
981467c9 | 1058 | kvm->arch.model.fac->mask[i] = 0UL; |
9d8d5786 MM |
1059 | } |
1060 | ||
981467c9 MM |
1061 | /* Populate the facility list initially. */ |
1062 | memcpy(kvm->arch.model.fac->list, kvm->arch.model.fac->mask, | |
1063 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
1064 | ||
9d8d5786 | 1065 | kvm_s390_get_cpu_id(&kvm->arch.model.cpu_id); |
658b6eda | 1066 | kvm->arch.model.ibc = sclp_get_ibc() & 0x0fff; |
9d8d5786 | 1067 | |
5102ee87 | 1068 | if (kvm_s390_crypto_init(kvm) < 0) |
40f5b735 | 1069 | goto out_err; |
5102ee87 | 1070 | |
ba5c1e9b CO |
1071 | spin_lock_init(&kvm->arch.float_int.lock); |
1072 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
8a242234 | 1073 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1074 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1075 | |
b0c632db HC |
1076 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
1077 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
1078 | ||
e08b9637 CO |
1079 | if (type & KVM_VM_S390_UCONTROL) { |
1080 | kvm->arch.gmap = NULL; | |
1081 | } else { | |
0349985a | 1082 | kvm->arch.gmap = gmap_alloc(current->mm, (1UL << 44) - 1); |
e08b9637 | 1083 | if (!kvm->arch.gmap) |
40f5b735 | 1084 | goto out_err; |
2c70fe44 | 1085 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1086 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1087 | } |
fa6b7fe9 CH |
1088 | |
1089 | kvm->arch.css_support = 0; | |
84223598 | 1090 | kvm->arch.use_irqchip = 0; |
72f25020 | 1091 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1092 | |
8ad35755 DH |
1093 | spin_lock_init(&kvm->arch.start_stop_lock); |
1094 | ||
d89f5eff | 1095 | return 0; |
40f5b735 | 1096 | out_err: |
5102ee87 | 1097 | kfree(kvm->arch.crypto.crycb); |
9d8d5786 | 1098 | free_page((unsigned long)kvm->arch.model.fac); |
598841ca | 1099 | debug_unregister(kvm->arch.dbf); |
b0c632db | 1100 | free_page((unsigned long)(kvm->arch.sca)); |
d89f5eff | 1101 | return rc; |
b0c632db HC |
1102 | } |
1103 | ||
d329c035 CB |
1104 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1105 | { | |
1106 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1107 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1108 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1109 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
1110 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
1111 | clear_bit(63 - vcpu->vcpu_id, | |
1112 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
1113 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
1114 | (__u64) vcpu->arch.sie_block) | |
1115 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
1116 | } | |
abf4a71e | 1117 | smp_mb(); |
27e0393f CO |
1118 | |
1119 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1120 | gmap_free(vcpu->arch.gmap); | |
1121 | ||
b31605c1 DD |
1122 | if (kvm_s390_cmma_enabled(vcpu->kvm)) |
1123 | kvm_s390_vcpu_unsetup_cmma(vcpu); | |
d329c035 | 1124 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1125 | |
6692cef3 | 1126 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1127 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1128 | } |
1129 | ||
1130 | static void kvm_free_vcpus(struct kvm *kvm) | |
1131 | { | |
1132 | unsigned int i; | |
988a2cae | 1133 | struct kvm_vcpu *vcpu; |
d329c035 | 1134 | |
988a2cae GN |
1135 | kvm_for_each_vcpu(i, vcpu, kvm) |
1136 | kvm_arch_vcpu_destroy(vcpu); | |
1137 | ||
1138 | mutex_lock(&kvm->lock); | |
1139 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1140 | kvm->vcpus[i] = NULL; | |
1141 | ||
1142 | atomic_set(&kvm->online_vcpus, 0); | |
1143 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1144 | } |
1145 | ||
b0c632db HC |
1146 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1147 | { | |
d329c035 | 1148 | kvm_free_vcpus(kvm); |
9d8d5786 | 1149 | free_page((unsigned long)kvm->arch.model.fac); |
b0c632db | 1150 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 1151 | debug_unregister(kvm->arch.dbf); |
5102ee87 | 1152 | kfree(kvm->arch.crypto.crycb); |
27e0393f CO |
1153 | if (!kvm_is_ucontrol(kvm)) |
1154 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 1155 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1156 | kvm_s390_clear_float_irqs(kvm); |
b0c632db HC |
1157 | } |
1158 | ||
1159 | /* Section: vcpu related */ | |
dafd032a DD |
1160 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1161 | { | |
1162 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); | |
1163 | if (!vcpu->arch.gmap) | |
1164 | return -ENOMEM; | |
1165 | vcpu->arch.gmap->private = vcpu->kvm; | |
1166 | ||
1167 | return 0; | |
1168 | } | |
1169 | ||
b0c632db HC |
1170 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1171 | { | |
3c038e6b DD |
1172 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1173 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1174 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1175 | KVM_SYNC_GPRS | | |
9eed0735 | 1176 | KVM_SYNC_ACRS | |
b028ee3e DH |
1177 | KVM_SYNC_CRS | |
1178 | KVM_SYNC_ARCH0 | | |
1179 | KVM_SYNC_PFAULT; | |
68c55750 EF |
1180 | if (test_kvm_facility(vcpu->kvm, 129)) |
1181 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; | |
dafd032a DD |
1182 | |
1183 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1184 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1185 | ||
b0c632db HC |
1186 | return 0; |
1187 | } | |
1188 | ||
b0c632db HC |
1189 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1190 | { | |
4725c860 | 1191 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
18280d8b | 1192 | if (test_kvm_facility(vcpu->kvm, 129)) |
68c55750 EF |
1193 | save_vx_regs((__vector128 *)&vcpu->arch.host_vregs->vrs); |
1194 | else | |
1195 | save_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db | 1196 | save_access_regs(vcpu->arch.host_acrs); |
18280d8b | 1197 | if (test_kvm_facility(vcpu->kvm, 129)) { |
68c55750 EF |
1198 | restore_fp_ctl(&vcpu->run->s.regs.fpc); |
1199 | restore_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs); | |
1200 | } else { | |
1201 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1202 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1203 | } | |
59674c1a | 1204 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 1205 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 1206 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
1207 | } |
1208 | ||
1209 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1210 | { | |
9e6dabef | 1211 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 1212 | gmap_disable(vcpu->arch.gmap); |
18280d8b | 1213 | if (test_kvm_facility(vcpu->kvm, 129)) { |
68c55750 EF |
1214 | save_fp_ctl(&vcpu->run->s.regs.fpc); |
1215 | save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs); | |
1216 | } else { | |
1217 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1218 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1219 | } | |
59674c1a | 1220 | save_access_regs(vcpu->run->s.regs.acrs); |
4725c860 | 1221 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
18280d8b | 1222 | if (test_kvm_facility(vcpu->kvm, 129)) |
68c55750 EF |
1223 | restore_vx_regs((__vector128 *)&vcpu->arch.host_vregs->vrs); |
1224 | else | |
1225 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db HC |
1226 | restore_access_regs(vcpu->arch.host_acrs); |
1227 | } | |
1228 | ||
1229 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1230 | { | |
1231 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1232 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1233 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1234 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
1235 | vcpu->arch.sie_block->cputm = 0UL; |
1236 | vcpu->arch.sie_block->ckc = 0UL; | |
1237 | vcpu->arch.sie_block->todpr = 0; | |
1238 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1239 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1240 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
1241 | vcpu->arch.guest_fpregs.fpc = 0; | |
1242 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
1243 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 1244 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1245 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1246 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1247 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1248 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1249 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1250 | } |
1251 | ||
31928aa5 | 1252 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1253 | { |
72f25020 JH |
1254 | mutex_lock(&vcpu->kvm->lock); |
1255 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; | |
1256 | mutex_unlock(&vcpu->kvm->lock); | |
dafd032a DD |
1257 | if (!kvm_is_ucontrol(vcpu->kvm)) |
1258 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; | |
42897d86 MT |
1259 | } |
1260 | ||
5102ee87 TK |
1261 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1262 | { | |
9d8d5786 | 1263 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1264 | return; |
1265 | ||
a374e892 TK |
1266 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1267 | ||
1268 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1269 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1270 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1271 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1272 | ||
5102ee87 TK |
1273 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1274 | } | |
1275 | ||
b31605c1 DD |
1276 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1277 | { | |
1278 | free_page(vcpu->arch.sie_block->cbrlo); | |
1279 | vcpu->arch.sie_block->cbrlo = 0; | |
1280 | } | |
1281 | ||
1282 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1283 | { | |
1284 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1285 | if (!vcpu->arch.sie_block->cbrlo) | |
1286 | return -ENOMEM; | |
1287 | ||
1288 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1289 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1290 | return 0; | |
1291 | } | |
1292 | ||
91520f1a MM |
1293 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
1294 | { | |
1295 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
1296 | ||
1297 | vcpu->arch.cpu_id = model->cpu_id; | |
1298 | vcpu->arch.sie_block->ibc = model->ibc; | |
1299 | vcpu->arch.sie_block->fac = (int) (long) model->fac->list; | |
1300 | } | |
1301 | ||
b0c632db HC |
1302 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1303 | { | |
b31605c1 | 1304 | int rc = 0; |
b31288fa | 1305 | |
9e6dabef CH |
1306 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1307 | CPUSTAT_SM | | |
69d0d3a3 CB |
1308 | CPUSTAT_STOPPED | |
1309 | CPUSTAT_GED); | |
91520f1a MM |
1310 | kvm_s390_vcpu_setup_model(vcpu); |
1311 | ||
fc34531d | 1312 | vcpu->arch.sie_block->ecb = 6; |
9d8d5786 | 1313 | if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1314 | vcpu->arch.sie_block->ecb |= 0x10; |
1315 | ||
69d0d3a3 | 1316 | vcpu->arch.sie_block->ecb2 = 8; |
ea5f4969 | 1317 | vcpu->arch.sie_block->eca = 0xC1002000U; |
217a4406 HC |
1318 | if (sclp_has_siif()) |
1319 | vcpu->arch.sie_block->eca |= 1; | |
ea5f4969 DH |
1320 | if (sclp_has_sigpif()) |
1321 | vcpu->arch.sie_block->eca |= 0x10000000U; | |
18280d8b | 1322 | if (test_kvm_facility(vcpu->kvm, 129)) { |
13211ea7 EF |
1323 | vcpu->arch.sie_block->eca |= 0x00020000; |
1324 | vcpu->arch.sie_block->ecd |= 0x20000000; | |
1325 | } | |
492d8642 | 1326 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
5a5e6536 | 1327 | |
b31605c1 DD |
1328 | if (kvm_s390_cmma_enabled(vcpu->kvm)) { |
1329 | rc = kvm_s390_vcpu_setup_cmma(vcpu); | |
1330 | if (rc) | |
1331 | return rc; | |
b31288fa | 1332 | } |
0ac96caf | 1333 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 1334 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 1335 | |
5102ee87 TK |
1336 | kvm_s390_vcpu_crypto_setup(vcpu); |
1337 | ||
b31605c1 | 1338 | return rc; |
b0c632db HC |
1339 | } |
1340 | ||
1341 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1342 | unsigned int id) | |
1343 | { | |
4d47555a | 1344 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 1345 | struct sie_page *sie_page; |
4d47555a CO |
1346 | int rc = -EINVAL; |
1347 | ||
1348 | if (id >= KVM_MAX_VCPUS) | |
1349 | goto out; | |
1350 | ||
1351 | rc = -ENOMEM; | |
b0c632db | 1352 | |
b110feaf | 1353 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 1354 | if (!vcpu) |
4d47555a | 1355 | goto out; |
b0c632db | 1356 | |
7feb6bb8 MM |
1357 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
1358 | if (!sie_page) | |
b0c632db HC |
1359 | goto out_free_cpu; |
1360 | ||
7feb6bb8 MM |
1361 | vcpu->arch.sie_block = &sie_page->sie_block; |
1362 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
68c55750 | 1363 | vcpu->arch.host_vregs = &sie_page->vregs; |
7feb6bb8 | 1364 | |
b0c632db | 1365 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
1366 | if (!kvm_is_ucontrol(kvm)) { |
1367 | if (!kvm->arch.sca) { | |
1368 | WARN_ON_ONCE(1); | |
1369 | goto out_free_cpu; | |
1370 | } | |
1371 | if (!kvm->arch.sca->cpu[id].sda) | |
1372 | kvm->arch.sca->cpu[id].sda = | |
1373 | (__u64) vcpu->arch.sie_block; | |
1374 | vcpu->arch.sie_block->scaoh = | |
1375 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
1376 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
1377 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
1378 | } | |
b0c632db | 1379 | |
ba5c1e9b | 1380 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 1381 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 1382 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 1383 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 1384 | |
b0c632db HC |
1385 | rc = kvm_vcpu_init(vcpu, kvm, id); |
1386 | if (rc) | |
7b06bf2f | 1387 | goto out_free_sie_block; |
b0c632db HC |
1388 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
1389 | vcpu->arch.sie_block); | |
ade38c31 | 1390 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 1391 | |
b0c632db | 1392 | return vcpu; |
7b06bf2f WY |
1393 | out_free_sie_block: |
1394 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 1395 | out_free_cpu: |
b110feaf | 1396 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 1397 | out: |
b0c632db HC |
1398 | return ERR_PTR(rc); |
1399 | } | |
1400 | ||
b0c632db HC |
1401 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
1402 | { | |
9a022067 | 1403 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
1404 | } |
1405 | ||
49b99e1e CB |
1406 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
1407 | { | |
1408 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
1409 | } | |
1410 | ||
1411 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
1412 | { | |
1413 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
1418 | * If the CPU is not running (e.g. waiting as idle) the function will | |
1419 | * return immediately. */ | |
1420 | void exit_sie(struct kvm_vcpu *vcpu) | |
1421 | { | |
1422 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
1423 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
1424 | cpu_relax(); | |
1425 | } | |
1426 | ||
1427 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
1428 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
1429 | { | |
1430 | s390_vcpu_block(vcpu); | |
1431 | exit_sie(vcpu); | |
1432 | } | |
1433 | ||
2c70fe44 CB |
1434 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
1435 | { | |
1436 | int i; | |
1437 | struct kvm *kvm = gmap->private; | |
1438 | struct kvm_vcpu *vcpu; | |
1439 | ||
1440 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1441 | /* match against both prefix pages */ | |
fda902cb | 1442 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 CB |
1443 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
1444 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
1445 | exit_sie_sync(vcpu); | |
1446 | } | |
1447 | } | |
1448 | } | |
1449 | ||
b6d33834 CD |
1450 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
1451 | { | |
1452 | /* kvm common code refers to this, but never calls it */ | |
1453 | BUG(); | |
1454 | return 0; | |
1455 | } | |
1456 | ||
14eebd91 CO |
1457 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
1458 | struct kvm_one_reg *reg) | |
1459 | { | |
1460 | int r = -EINVAL; | |
1461 | ||
1462 | switch (reg->id) { | |
29b7c71b CO |
1463 | case KVM_REG_S390_TODPR: |
1464 | r = put_user(vcpu->arch.sie_block->todpr, | |
1465 | (u32 __user *)reg->addr); | |
1466 | break; | |
1467 | case KVM_REG_S390_EPOCHDIFF: | |
1468 | r = put_user(vcpu->arch.sie_block->epoch, | |
1469 | (u64 __user *)reg->addr); | |
1470 | break; | |
46a6dd1c J |
1471 | case KVM_REG_S390_CPU_TIMER: |
1472 | r = put_user(vcpu->arch.sie_block->cputm, | |
1473 | (u64 __user *)reg->addr); | |
1474 | break; | |
1475 | case KVM_REG_S390_CLOCK_COMP: | |
1476 | r = put_user(vcpu->arch.sie_block->ckc, | |
1477 | (u64 __user *)reg->addr); | |
1478 | break; | |
536336c2 DD |
1479 | case KVM_REG_S390_PFTOKEN: |
1480 | r = put_user(vcpu->arch.pfault_token, | |
1481 | (u64 __user *)reg->addr); | |
1482 | break; | |
1483 | case KVM_REG_S390_PFCOMPARE: | |
1484 | r = put_user(vcpu->arch.pfault_compare, | |
1485 | (u64 __user *)reg->addr); | |
1486 | break; | |
1487 | case KVM_REG_S390_PFSELECT: | |
1488 | r = put_user(vcpu->arch.pfault_select, | |
1489 | (u64 __user *)reg->addr); | |
1490 | break; | |
672550fb CB |
1491 | case KVM_REG_S390_PP: |
1492 | r = put_user(vcpu->arch.sie_block->pp, | |
1493 | (u64 __user *)reg->addr); | |
1494 | break; | |
afa45ff5 CB |
1495 | case KVM_REG_S390_GBEA: |
1496 | r = put_user(vcpu->arch.sie_block->gbea, | |
1497 | (u64 __user *)reg->addr); | |
1498 | break; | |
14eebd91 CO |
1499 | default: |
1500 | break; | |
1501 | } | |
1502 | ||
1503 | return r; | |
1504 | } | |
1505 | ||
1506 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
1507 | struct kvm_one_reg *reg) | |
1508 | { | |
1509 | int r = -EINVAL; | |
1510 | ||
1511 | switch (reg->id) { | |
29b7c71b CO |
1512 | case KVM_REG_S390_TODPR: |
1513 | r = get_user(vcpu->arch.sie_block->todpr, | |
1514 | (u32 __user *)reg->addr); | |
1515 | break; | |
1516 | case KVM_REG_S390_EPOCHDIFF: | |
1517 | r = get_user(vcpu->arch.sie_block->epoch, | |
1518 | (u64 __user *)reg->addr); | |
1519 | break; | |
46a6dd1c J |
1520 | case KVM_REG_S390_CPU_TIMER: |
1521 | r = get_user(vcpu->arch.sie_block->cputm, | |
1522 | (u64 __user *)reg->addr); | |
1523 | break; | |
1524 | case KVM_REG_S390_CLOCK_COMP: | |
1525 | r = get_user(vcpu->arch.sie_block->ckc, | |
1526 | (u64 __user *)reg->addr); | |
1527 | break; | |
536336c2 DD |
1528 | case KVM_REG_S390_PFTOKEN: |
1529 | r = get_user(vcpu->arch.pfault_token, | |
1530 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
1531 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
1532 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
1533 | break; |
1534 | case KVM_REG_S390_PFCOMPARE: | |
1535 | r = get_user(vcpu->arch.pfault_compare, | |
1536 | (u64 __user *)reg->addr); | |
1537 | break; | |
1538 | case KVM_REG_S390_PFSELECT: | |
1539 | r = get_user(vcpu->arch.pfault_select, | |
1540 | (u64 __user *)reg->addr); | |
1541 | break; | |
672550fb CB |
1542 | case KVM_REG_S390_PP: |
1543 | r = get_user(vcpu->arch.sie_block->pp, | |
1544 | (u64 __user *)reg->addr); | |
1545 | break; | |
afa45ff5 CB |
1546 | case KVM_REG_S390_GBEA: |
1547 | r = get_user(vcpu->arch.sie_block->gbea, | |
1548 | (u64 __user *)reg->addr); | |
1549 | break; | |
14eebd91 CO |
1550 | default: |
1551 | break; | |
1552 | } | |
1553 | ||
1554 | return r; | |
1555 | } | |
b6d33834 | 1556 | |
b0c632db HC |
1557 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
1558 | { | |
b0c632db | 1559 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
1560 | return 0; |
1561 | } | |
1562 | ||
1563 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1564 | { | |
5a32c1af | 1565 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
1566 | return 0; |
1567 | } | |
1568 | ||
1569 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1570 | { | |
5a32c1af | 1571 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
1572 | return 0; |
1573 | } | |
1574 | ||
1575 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
1576 | struct kvm_sregs *sregs) | |
1577 | { | |
59674c1a | 1578 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 1579 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 1580 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
1581 | return 0; |
1582 | } | |
1583 | ||
1584 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
1585 | struct kvm_sregs *sregs) | |
1586 | { | |
59674c1a | 1587 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 1588 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
1589 | return 0; |
1590 | } | |
1591 | ||
1592 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1593 | { | |
4725c860 MS |
1594 | if (test_fp_ctl(fpu->fpc)) |
1595 | return -EINVAL; | |
b0c632db | 1596 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 MS |
1597 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
1598 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1599 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
b0c632db HC |
1600 | return 0; |
1601 | } | |
1602 | ||
1603 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1604 | { | |
b0c632db HC |
1605 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
1606 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
1607 | return 0; |
1608 | } | |
1609 | ||
1610 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
1611 | { | |
1612 | int rc = 0; | |
1613 | ||
7a42fdc2 | 1614 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 1615 | rc = -EBUSY; |
d7b0b5eb CO |
1616 | else { |
1617 | vcpu->run->psw_mask = psw.mask; | |
1618 | vcpu->run->psw_addr = psw.addr; | |
1619 | } | |
b0c632db HC |
1620 | return rc; |
1621 | } | |
1622 | ||
1623 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
1624 | struct kvm_translation *tr) | |
1625 | { | |
1626 | return -EINVAL; /* not implemented yet */ | |
1627 | } | |
1628 | ||
27291e21 DH |
1629 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
1630 | KVM_GUESTDBG_USE_HW_BP | \ | |
1631 | KVM_GUESTDBG_ENABLE) | |
1632 | ||
d0bfb940 JK |
1633 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
1634 | struct kvm_guest_debug *dbg) | |
b0c632db | 1635 | { |
27291e21 DH |
1636 | int rc = 0; |
1637 | ||
1638 | vcpu->guest_debug = 0; | |
1639 | kvm_s390_clear_bp_data(vcpu); | |
1640 | ||
2de3bfc2 | 1641 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
1642 | return -EINVAL; |
1643 | ||
1644 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
1645 | vcpu->guest_debug = dbg->control; | |
1646 | /* enforce guest PER */ | |
1647 | atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1648 | ||
1649 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
1650 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
1651 | } else { | |
1652 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1653 | vcpu->arch.guestdbg.last_bp = 0; | |
1654 | } | |
1655 | ||
1656 | if (rc) { | |
1657 | vcpu->guest_debug = 0; | |
1658 | kvm_s390_clear_bp_data(vcpu); | |
1659 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1660 | } | |
1661 | ||
1662 | return rc; | |
b0c632db HC |
1663 | } |
1664 | ||
62d9f0db MT |
1665 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
1666 | struct kvm_mp_state *mp_state) | |
1667 | { | |
6352e4d2 DH |
1668 | /* CHECK_STOP and LOAD are not supported yet */ |
1669 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
1670 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
1671 | } |
1672 | ||
1673 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
1674 | struct kvm_mp_state *mp_state) | |
1675 | { | |
6352e4d2 DH |
1676 | int rc = 0; |
1677 | ||
1678 | /* user space knows about this interface - let it control the state */ | |
1679 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
1680 | ||
1681 | switch (mp_state->mp_state) { | |
1682 | case KVM_MP_STATE_STOPPED: | |
1683 | kvm_s390_vcpu_stop(vcpu); | |
1684 | break; | |
1685 | case KVM_MP_STATE_OPERATING: | |
1686 | kvm_s390_vcpu_start(vcpu); | |
1687 | break; | |
1688 | case KVM_MP_STATE_LOAD: | |
1689 | case KVM_MP_STATE_CHECK_STOP: | |
1690 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
1691 | default: | |
1692 | rc = -ENXIO; | |
1693 | } | |
1694 | ||
1695 | return rc; | |
62d9f0db MT |
1696 | } |
1697 | ||
b31605c1 DD |
1698 | bool kvm_s390_cmma_enabled(struct kvm *kvm) |
1699 | { | |
1700 | if (!MACHINE_IS_LPAR) | |
1701 | return false; | |
1702 | /* only enable for z10 and later */ | |
1703 | if (!MACHINE_HAS_EDAT1) | |
1704 | return false; | |
1705 | if (!kvm->arch.use_cmma) | |
1706 | return false; | |
1707 | return true; | |
1708 | } | |
1709 | ||
8ad35755 DH |
1710 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
1711 | { | |
1712 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
1713 | } | |
1714 | ||
2c70fe44 CB |
1715 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
1716 | { | |
8ad35755 DH |
1717 | retry: |
1718 | s390_vcpu_unblock(vcpu); | |
2c70fe44 CB |
1719 | /* |
1720 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
1721 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
1722 | * This ensures that the ipte instruction for this request has | |
1723 | * already finished. We might race against a second unmapper that | |
1724 | * wants to set the blocking bit. Lets just retry the request loop. | |
1725 | */ | |
8ad35755 | 1726 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
1727 | int rc; |
1728 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 1729 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
1730 | PAGE_SIZE * 2); |
1731 | if (rc) | |
1732 | return rc; | |
8ad35755 | 1733 | goto retry; |
2c70fe44 | 1734 | } |
8ad35755 | 1735 | |
d3d692c8 DH |
1736 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
1737 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
1738 | goto retry; | |
1739 | } | |
1740 | ||
8ad35755 DH |
1741 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
1742 | if (!ibs_enabled(vcpu)) { | |
1743 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
1744 | atomic_set_mask(CPUSTAT_IBS, | |
1745 | &vcpu->arch.sie_block->cpuflags); | |
1746 | } | |
1747 | goto retry; | |
2c70fe44 | 1748 | } |
8ad35755 DH |
1749 | |
1750 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
1751 | if (ibs_enabled(vcpu)) { | |
1752 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
1753 | atomic_clear_mask(CPUSTAT_IBS, | |
1754 | &vcpu->arch.sie_block->cpuflags); | |
1755 | } | |
1756 | goto retry; | |
1757 | } | |
1758 | ||
0759d068 DH |
1759 | /* nothing to do, just clear the request */ |
1760 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
1761 | ||
2c70fe44 CB |
1762 | return 0; |
1763 | } | |
1764 | ||
fa576c58 TH |
1765 | /** |
1766 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
1767 | * @vcpu: The corresponding virtual cpu | |
1768 | * @gpa: Guest physical address | |
1769 | * @writable: Whether the page should be writable or not | |
1770 | * | |
1771 | * Make sure that a guest page has been faulted-in on the host. | |
1772 | * | |
1773 | * Return: Zero on success, negative error code otherwise. | |
1774 | */ | |
1775 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 1776 | { |
527e30b4 MS |
1777 | return gmap_fault(vcpu->arch.gmap, gpa, |
1778 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
1779 | } |
1780 | ||
3c038e6b DD |
1781 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
1782 | unsigned long token) | |
1783 | { | |
1784 | struct kvm_s390_interrupt inti; | |
383d0b05 | 1785 | struct kvm_s390_irq irq; |
3c038e6b DD |
1786 | |
1787 | if (start_token) { | |
383d0b05 JF |
1788 | irq.u.ext.ext_params2 = token; |
1789 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
1790 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
1791 | } else { |
1792 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 1793 | inti.parm64 = token; |
3c038e6b DD |
1794 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
1795 | } | |
1796 | } | |
1797 | ||
1798 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
1799 | struct kvm_async_pf *work) | |
1800 | { | |
1801 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
1802 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
1803 | } | |
1804 | ||
1805 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
1806 | struct kvm_async_pf *work) | |
1807 | { | |
1808 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
1809 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
1810 | } | |
1811 | ||
1812 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
1813 | struct kvm_async_pf *work) | |
1814 | { | |
1815 | /* s390 will always inject the page directly */ | |
1816 | } | |
1817 | ||
1818 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
1819 | { | |
1820 | /* | |
1821 | * s390 will always inject the page directly, | |
1822 | * but we still want check_async_completion to cleanup | |
1823 | */ | |
1824 | return true; | |
1825 | } | |
1826 | ||
1827 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
1828 | { | |
1829 | hva_t hva; | |
1830 | struct kvm_arch_async_pf arch; | |
1831 | int rc; | |
1832 | ||
1833 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
1834 | return 0; | |
1835 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
1836 | vcpu->arch.pfault_compare) | |
1837 | return 0; | |
1838 | if (psw_extint_disabled(vcpu)) | |
1839 | return 0; | |
9a022067 | 1840 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
1841 | return 0; |
1842 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
1843 | return 0; | |
1844 | if (!vcpu->arch.gmap->pfault_enabled) | |
1845 | return 0; | |
1846 | ||
81480cc1 HC |
1847 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
1848 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
1849 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
1850 | return 0; |
1851 | ||
1852 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
1853 | return rc; | |
1854 | } | |
1855 | ||
3fb4c40f | 1856 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 1857 | { |
3fb4c40f | 1858 | int rc, cpuflags; |
e168bf8d | 1859 | |
3c038e6b DD |
1860 | /* |
1861 | * On s390 notifications for arriving pages will be delivered directly | |
1862 | * to the guest but the house keeping for completed pfaults is | |
1863 | * handled outside the worker. | |
1864 | */ | |
1865 | kvm_check_async_pf_completion(vcpu); | |
1866 | ||
5a32c1af | 1867 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
1868 | |
1869 | if (need_resched()) | |
1870 | schedule(); | |
1871 | ||
d3a73acb | 1872 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
1873 | s390_handle_mcck(); |
1874 | ||
79395031 JF |
1875 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
1876 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
1877 | if (rc) | |
1878 | return rc; | |
1879 | } | |
0ff31867 | 1880 | |
2c70fe44 CB |
1881 | rc = kvm_s390_handle_requests(vcpu); |
1882 | if (rc) | |
1883 | return rc; | |
1884 | ||
27291e21 DH |
1885 | if (guestdbg_enabled(vcpu)) { |
1886 | kvm_s390_backup_guest_per_regs(vcpu); | |
1887 | kvm_s390_patch_guest_per_regs(vcpu); | |
1888 | } | |
1889 | ||
b0c632db | 1890 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
1891 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
1892 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
1893 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 1894 | |
3fb4c40f TH |
1895 | return 0; |
1896 | } | |
1897 | ||
492d8642 TH |
1898 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
1899 | { | |
1900 | psw_t *psw = &vcpu->arch.sie_block->gpsw; | |
1901 | u8 opcode; | |
1902 | int rc; | |
1903 | ||
1904 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
1905 | trace_kvm_s390_sie_fault(vcpu); | |
1906 | ||
1907 | /* | |
1908 | * We want to inject an addressing exception, which is defined as a | |
1909 | * suppressing or terminating exception. However, since we came here | |
1910 | * by a DAT access exception, the PSW still points to the faulting | |
1911 | * instruction since DAT exceptions are nullifying. So we've got | |
1912 | * to look up the current opcode to get the length of the instruction | |
1913 | * to be able to forward the PSW. | |
1914 | */ | |
8ae04b8f | 1915 | rc = read_guest(vcpu, psw->addr, 0, &opcode, 1); |
492d8642 TH |
1916 | if (rc) |
1917 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
1918 | psw->addr = __rewind_psw(*psw, -insn_length(opcode)); | |
1919 | ||
1920 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
1921 | } | |
1922 | ||
3fb4c40f TH |
1923 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
1924 | { | |
24eb3a82 | 1925 | int rc = -1; |
2b29a9fd DD |
1926 | |
1927 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
1928 | vcpu->arch.sie_block->icptcode); | |
1929 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
1930 | ||
27291e21 DH |
1931 | if (guestdbg_enabled(vcpu)) |
1932 | kvm_s390_restore_guest_per_regs(vcpu); | |
1933 | ||
3fb4c40f | 1934 | if (exit_reason >= 0) { |
7c470539 | 1935 | rc = 0; |
210b1607 TH |
1936 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
1937 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
1938 | vcpu->run->s390_ucontrol.trans_exc_code = | |
1939 | current->thread.gmap_addr; | |
1940 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
1941 | rc = -EREMOTE; | |
24eb3a82 DD |
1942 | |
1943 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 1944 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 1945 | current->thread.gmap_pfault = 0; |
fa576c58 | 1946 | if (kvm_arch_setup_async_pf(vcpu)) { |
24eb3a82 | 1947 | rc = 0; |
fa576c58 TH |
1948 | } else { |
1949 | gpa_t gpa = current->thread.gmap_addr; | |
1950 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); | |
1951 | } | |
24eb3a82 DD |
1952 | } |
1953 | ||
492d8642 TH |
1954 | if (rc == -1) |
1955 | rc = vcpu_post_run_fault_in_sie(vcpu); | |
b0c632db | 1956 | |
5a32c1af | 1957 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 1958 | |
a76ccff6 TH |
1959 | if (rc == 0) { |
1960 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
1961 | /* Don't exit for host interrupts. */ |
1962 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
1963 | else |
1964 | rc = kvm_handle_sie_intercept(vcpu); | |
1965 | } | |
1966 | ||
3fb4c40f TH |
1967 | return rc; |
1968 | } | |
1969 | ||
1970 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
1971 | { | |
1972 | int rc, exit_reason; | |
1973 | ||
800c1065 TH |
1974 | /* |
1975 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
1976 | * ning the guest), so that memslots (and other stuff) are protected | |
1977 | */ | |
1978 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
1979 | ||
a76ccff6 TH |
1980 | do { |
1981 | rc = vcpu_pre_run(vcpu); | |
1982 | if (rc) | |
1983 | break; | |
3fb4c40f | 1984 | |
800c1065 | 1985 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
1986 | /* |
1987 | * As PF_VCPU will be used in fault handler, between | |
1988 | * guest_enter and guest_exit should be no uaccess. | |
1989 | */ | |
1990 | preempt_disable(); | |
1991 | kvm_guest_enter(); | |
1992 | preempt_enable(); | |
1993 | exit_reason = sie64a(vcpu->arch.sie_block, | |
1994 | vcpu->run->s.regs.gprs); | |
1995 | kvm_guest_exit(); | |
800c1065 | 1996 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
1997 | |
1998 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 1999 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 2000 | |
800c1065 | 2001 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 2002 | return rc; |
b0c632db HC |
2003 | } |
2004 | ||
b028ee3e DH |
2005 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2006 | { | |
2007 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
2008 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
2009 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
2010 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
2011 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
2012 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
2013 | /* some control register changes require a tlb flush */ |
2014 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
2015 | } |
2016 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
2017 | vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; | |
2018 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; | |
2019 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
2020 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
2021 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
2022 | } | |
2023 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
2024 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
2025 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
2026 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
2027 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2028 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e DH |
2029 | } |
2030 | kvm_run->kvm_dirty_regs = 0; | |
2031 | } | |
2032 | ||
2033 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2034 | { | |
2035 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
2036 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
2037 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
2038 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
2039 | kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm; | |
2040 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; | |
2041 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
2042 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
2043 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
2044 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
2045 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
2046 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
2047 | } | |
2048 | ||
b0c632db HC |
2049 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2050 | { | |
8f2abe6a | 2051 | int rc; |
b0c632db HC |
2052 | sigset_t sigsaved; |
2053 | ||
27291e21 DH |
2054 | if (guestdbg_exit_pending(vcpu)) { |
2055 | kvm_s390_prepare_debug_exit(vcpu); | |
2056 | return 0; | |
2057 | } | |
2058 | ||
b0c632db HC |
2059 | if (vcpu->sigset_active) |
2060 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2061 | ||
6352e4d2 DH |
2062 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
2063 | kvm_s390_vcpu_start(vcpu); | |
2064 | } else if (is_vcpu_stopped(vcpu)) { | |
2065 | pr_err_ratelimited("kvm-s390: can't run stopped vcpu %d\n", | |
2066 | vcpu->vcpu_id); | |
2067 | return -EINVAL; | |
2068 | } | |
b0c632db | 2069 | |
b028ee3e | 2070 | sync_regs(vcpu, kvm_run); |
d7b0b5eb | 2071 | |
dab4079d | 2072 | might_fault(); |
a76ccff6 | 2073 | rc = __vcpu_run(vcpu); |
9ace903d | 2074 | |
b1d16c49 CE |
2075 | if (signal_pending(current) && !rc) { |
2076 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 2077 | rc = -EINTR; |
b1d16c49 | 2078 | } |
8f2abe6a | 2079 | |
27291e21 DH |
2080 | if (guestdbg_exit_pending(vcpu) && !rc) { |
2081 | kvm_s390_prepare_debug_exit(vcpu); | |
2082 | rc = 0; | |
2083 | } | |
2084 | ||
b8e660b8 | 2085 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
2086 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
2087 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
2088 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
2089 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
2090 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
2091 | rc = 0; | |
2092 | } | |
2093 | ||
2094 | if (rc == -EREMOTE) { | |
2095 | /* intercept was handled, but userspace support is needed | |
2096 | * kvm_run has been prepared by the handler */ | |
2097 | rc = 0; | |
2098 | } | |
b0c632db | 2099 | |
b028ee3e | 2100 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 2101 | |
b0c632db HC |
2102 | if (vcpu->sigset_active) |
2103 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2104 | ||
b0c632db | 2105 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 2106 | return rc; |
b0c632db HC |
2107 | } |
2108 | ||
b0c632db HC |
2109 | /* |
2110 | * store status at address | |
2111 | * we use have two special cases: | |
2112 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
2113 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
2114 | */ | |
d0bce605 | 2115 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 2116 | { |
092670cd | 2117 | unsigned char archmode = 1; |
fda902cb | 2118 | unsigned int px; |
178bd789 | 2119 | u64 clkcomp; |
d0bce605 | 2120 | int rc; |
b0c632db | 2121 | |
d0bce605 HC |
2122 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
2123 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 2124 | return -EFAULT; |
d0bce605 HC |
2125 | gpa = SAVE_AREA_BASE; |
2126 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { | |
2127 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 2128 | return -EFAULT; |
d0bce605 HC |
2129 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
2130 | } | |
2131 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), | |
2132 | vcpu->arch.guest_fpregs.fprs, 128); | |
2133 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), | |
2134 | vcpu->run->s.regs.gprs, 128); | |
2135 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), | |
2136 | &vcpu->arch.sie_block->gpsw, 16); | |
fda902cb | 2137 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 | 2138 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
fda902cb | 2139 | &px, 4); |
d0bce605 HC |
2140 | rc |= write_guest_abs(vcpu, |
2141 | gpa + offsetof(struct save_area, fp_ctrl_reg), | |
2142 | &vcpu->arch.guest_fpregs.fpc, 4); | |
2143 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), | |
2144 | &vcpu->arch.sie_block->todpr, 4); | |
2145 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), | |
2146 | &vcpu->arch.sie_block->cputm, 8); | |
178bd789 | 2147 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d0bce605 HC |
2148 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
2149 | &clkcomp, 8); | |
2150 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), | |
2151 | &vcpu->run->s.regs.acrs, 64); | |
2152 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), | |
2153 | &vcpu->arch.sie_block->gcr, 128); | |
2154 | return rc ? -EFAULT : 0; | |
b0c632db HC |
2155 | } |
2156 | ||
e879892c TH |
2157 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
2158 | { | |
2159 | /* | |
2160 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
2161 | * copying in vcpu load/put. Lets update our copies before we save | |
2162 | * it into the save area | |
2163 | */ | |
2164 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
2165 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
2166 | save_access_regs(vcpu->run->s.regs.acrs); | |
2167 | ||
2168 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
2169 | } | |
2170 | ||
bc17de7c EF |
2171 | /* |
2172 | * store additional status at address | |
2173 | */ | |
2174 | int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, | |
2175 | unsigned long gpa) | |
2176 | { | |
2177 | /* Only bits 0-53 are used for address formation */ | |
2178 | if (!(gpa & ~0x3ff)) | |
2179 | return 0; | |
2180 | ||
2181 | return write_guest_abs(vcpu, gpa & ~0x3ff, | |
2182 | (void *)&vcpu->run->s.regs.vrs, 512); | |
2183 | } | |
2184 | ||
2185 | int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
2186 | { | |
2187 | if (!test_kvm_facility(vcpu->kvm, 129)) | |
2188 | return 0; | |
2189 | ||
2190 | /* | |
2191 | * The guest VXRS are in the host VXRs due to the lazy | |
2192 | * copying in vcpu load/put. Let's update our copies before we save | |
2193 | * it into the save area. | |
2194 | */ | |
2195 | save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs); | |
2196 | ||
2197 | return kvm_s390_store_adtl_status_unloaded(vcpu, addr); | |
2198 | } | |
2199 | ||
8ad35755 DH |
2200 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2201 | { | |
2202 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
2203 | kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu); | |
2204 | exit_sie_sync(vcpu); | |
2205 | } | |
2206 | ||
2207 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2208 | { | |
2209 | unsigned int i; | |
2210 | struct kvm_vcpu *vcpu; | |
2211 | ||
2212 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2213 | __disable_ibs_on_vcpu(vcpu); | |
2214 | } | |
2215 | } | |
2216 | ||
2217 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2218 | { | |
2219 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
2220 | kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu); | |
2221 | exit_sie_sync(vcpu); | |
2222 | } | |
2223 | ||
6852d7b6 DH |
2224 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2225 | { | |
8ad35755 DH |
2226 | int i, online_vcpus, started_vcpus = 0; |
2227 | ||
2228 | if (!is_vcpu_stopped(vcpu)) | |
2229 | return; | |
2230 | ||
6852d7b6 | 2231 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2232 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2233 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2234 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2235 | ||
2236 | for (i = 0; i < online_vcpus; i++) { | |
2237 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2238 | started_vcpus++; | |
2239 | } | |
2240 | ||
2241 | if (started_vcpus == 0) { | |
2242 | /* we're the only active VCPU -> speed it up */ | |
2243 | __enable_ibs_on_vcpu(vcpu); | |
2244 | } else if (started_vcpus == 1) { | |
2245 | /* | |
2246 | * As we are starting a second VCPU, we have to disable | |
2247 | * the IBS facility on all VCPUs to remove potentially | |
2248 | * oustanding ENABLE requests. | |
2249 | */ | |
2250 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2251 | } | |
2252 | ||
6852d7b6 | 2253 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2254 | /* |
2255 | * Another VCPU might have used IBS while we were offline. | |
2256 | * Let's play safe and flush the VCPU at startup. | |
2257 | */ | |
d3d692c8 | 2258 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2259 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2260 | return; |
6852d7b6 DH |
2261 | } |
2262 | ||
2263 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2264 | { | |
8ad35755 DH |
2265 | int i, online_vcpus, started_vcpus = 0; |
2266 | struct kvm_vcpu *started_vcpu = NULL; | |
2267 | ||
2268 | if (is_vcpu_stopped(vcpu)) | |
2269 | return; | |
2270 | ||
6852d7b6 | 2271 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2272 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2273 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2274 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2275 | ||
32f5ff63 | 2276 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 2277 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 2278 | |
6cddd432 | 2279 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2280 | __disable_ibs_on_vcpu(vcpu); |
2281 | ||
2282 | for (i = 0; i < online_vcpus; i++) { | |
2283 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
2284 | started_vcpus++; | |
2285 | started_vcpu = vcpu->kvm->vcpus[i]; | |
2286 | } | |
2287 | } | |
2288 | ||
2289 | if (started_vcpus == 1) { | |
2290 | /* | |
2291 | * As we only have one VCPU left, we want to enable the | |
2292 | * IBS facility for that VCPU to speed it up. | |
2293 | */ | |
2294 | __enable_ibs_on_vcpu(started_vcpu); | |
2295 | } | |
2296 | ||
433b9ee4 | 2297 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2298 | return; |
6852d7b6 DH |
2299 | } |
2300 | ||
d6712df9 CH |
2301 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
2302 | struct kvm_enable_cap *cap) | |
2303 | { | |
2304 | int r; | |
2305 | ||
2306 | if (cap->flags) | |
2307 | return -EINVAL; | |
2308 | ||
2309 | switch (cap->cap) { | |
fa6b7fe9 CH |
2310 | case KVM_CAP_S390_CSS_SUPPORT: |
2311 | if (!vcpu->kvm->arch.css_support) { | |
2312 | vcpu->kvm->arch.css_support = 1; | |
2313 | trace_kvm_s390_enable_css(vcpu->kvm); | |
2314 | } | |
2315 | r = 0; | |
2316 | break; | |
d6712df9 CH |
2317 | default: |
2318 | r = -EINVAL; | |
2319 | break; | |
2320 | } | |
2321 | return r; | |
2322 | } | |
2323 | ||
41408c28 TH |
2324 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
2325 | struct kvm_s390_mem_op *mop) | |
2326 | { | |
2327 | void __user *uaddr = (void __user *)mop->buf; | |
2328 | void *tmpbuf = NULL; | |
2329 | int r, srcu_idx; | |
2330 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
2331 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
2332 | ||
2333 | if (mop->flags & ~supported_flags) | |
2334 | return -EINVAL; | |
2335 | ||
2336 | if (mop->size > MEM_OP_MAX_SIZE) | |
2337 | return -E2BIG; | |
2338 | ||
2339 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
2340 | tmpbuf = vmalloc(mop->size); | |
2341 | if (!tmpbuf) | |
2342 | return -ENOMEM; | |
2343 | } | |
2344 | ||
2345 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2346 | ||
2347 | switch (mop->op) { | |
2348 | case KVM_S390_MEMOP_LOGICAL_READ: | |
2349 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
2350 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, false); | |
2351 | break; | |
2352 | } | |
2353 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2354 | if (r == 0) { | |
2355 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
2356 | r = -EFAULT; | |
2357 | } | |
2358 | break; | |
2359 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
2360 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
2361 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, true); | |
2362 | break; | |
2363 | } | |
2364 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
2365 | r = -EFAULT; | |
2366 | break; | |
2367 | } | |
2368 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2369 | break; | |
2370 | default: | |
2371 | r = -EINVAL; | |
2372 | } | |
2373 | ||
2374 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
2375 | ||
2376 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
2377 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
2378 | ||
2379 | vfree(tmpbuf); | |
2380 | return r; | |
2381 | } | |
2382 | ||
b0c632db HC |
2383 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2384 | unsigned int ioctl, unsigned long arg) | |
2385 | { | |
2386 | struct kvm_vcpu *vcpu = filp->private_data; | |
2387 | void __user *argp = (void __user *)arg; | |
800c1065 | 2388 | int idx; |
bc923cc9 | 2389 | long r; |
b0c632db | 2390 | |
93736624 AK |
2391 | switch (ioctl) { |
2392 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b | 2393 | struct kvm_s390_interrupt s390int; |
383d0b05 | 2394 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 2395 | |
93736624 | 2396 | r = -EFAULT; |
ba5c1e9b | 2397 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 2398 | break; |
383d0b05 JF |
2399 | if (s390int_to_s390irq(&s390int, &s390irq)) |
2400 | return -EINVAL; | |
2401 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 2402 | break; |
ba5c1e9b | 2403 | } |
b0c632db | 2404 | case KVM_S390_STORE_STATUS: |
800c1065 | 2405 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 2406 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 2407 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 2408 | break; |
b0c632db HC |
2409 | case KVM_S390_SET_INITIAL_PSW: { |
2410 | psw_t psw; | |
2411 | ||
bc923cc9 | 2412 | r = -EFAULT; |
b0c632db | 2413 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
2414 | break; |
2415 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
2416 | break; | |
b0c632db HC |
2417 | } |
2418 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
2419 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
2420 | break; | |
14eebd91 CO |
2421 | case KVM_SET_ONE_REG: |
2422 | case KVM_GET_ONE_REG: { | |
2423 | struct kvm_one_reg reg; | |
2424 | r = -EFAULT; | |
2425 | if (copy_from_user(®, argp, sizeof(reg))) | |
2426 | break; | |
2427 | if (ioctl == KVM_SET_ONE_REG) | |
2428 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
2429 | else | |
2430 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
2431 | break; | |
2432 | } | |
27e0393f CO |
2433 | #ifdef CONFIG_KVM_S390_UCONTROL |
2434 | case KVM_S390_UCAS_MAP: { | |
2435 | struct kvm_s390_ucas_mapping ucasmap; | |
2436 | ||
2437 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2438 | r = -EFAULT; | |
2439 | break; | |
2440 | } | |
2441 | ||
2442 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2443 | r = -EINVAL; | |
2444 | break; | |
2445 | } | |
2446 | ||
2447 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
2448 | ucasmap.vcpu_addr, ucasmap.length); | |
2449 | break; | |
2450 | } | |
2451 | case KVM_S390_UCAS_UNMAP: { | |
2452 | struct kvm_s390_ucas_mapping ucasmap; | |
2453 | ||
2454 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2455 | r = -EFAULT; | |
2456 | break; | |
2457 | } | |
2458 | ||
2459 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2460 | r = -EINVAL; | |
2461 | break; | |
2462 | } | |
2463 | ||
2464 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
2465 | ucasmap.length); | |
2466 | break; | |
2467 | } | |
2468 | #endif | |
ccc7910f | 2469 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 2470 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
2471 | break; |
2472 | } | |
d6712df9 CH |
2473 | case KVM_ENABLE_CAP: |
2474 | { | |
2475 | struct kvm_enable_cap cap; | |
2476 | r = -EFAULT; | |
2477 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
2478 | break; | |
2479 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
2480 | break; | |
2481 | } | |
41408c28 TH |
2482 | case KVM_S390_MEM_OP: { |
2483 | struct kvm_s390_mem_op mem_op; | |
2484 | ||
2485 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
2486 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
2487 | else | |
2488 | r = -EFAULT; | |
2489 | break; | |
2490 | } | |
b0c632db | 2491 | default: |
3e6afcf1 | 2492 | r = -ENOTTY; |
b0c632db | 2493 | } |
bc923cc9 | 2494 | return r; |
b0c632db HC |
2495 | } |
2496 | ||
5b1c1493 CO |
2497 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
2498 | { | |
2499 | #ifdef CONFIG_KVM_S390_UCONTROL | |
2500 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
2501 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
2502 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
2503 | get_page(vmf->page); | |
2504 | return 0; | |
2505 | } | |
2506 | #endif | |
2507 | return VM_FAULT_SIGBUS; | |
2508 | } | |
2509 | ||
5587027c AK |
2510 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
2511 | unsigned long npages) | |
db3fe4eb TY |
2512 | { |
2513 | return 0; | |
2514 | } | |
2515 | ||
b0c632db | 2516 | /* Section: memory related */ |
f7784b8e MT |
2517 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
2518 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
2519 | struct kvm_userspace_memory_region *mem, |
2520 | enum kvm_mr_change change) | |
b0c632db | 2521 | { |
dd2887e7 NW |
2522 | /* A few sanity checks. We can have memory slots which have to be |
2523 | located/ended at a segment boundary (1MB). The memory in userland is | |
2524 | ok to be fragmented into various different vmas. It is okay to mmap() | |
2525 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 2526 | |
598841ca | 2527 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
2528 | return -EINVAL; |
2529 | ||
598841ca | 2530 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
2531 | return -EINVAL; |
2532 | ||
f7784b8e MT |
2533 | return 0; |
2534 | } | |
2535 | ||
2536 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
2537 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
2538 | const struct kvm_memory_slot *old, |
2539 | enum kvm_mr_change change) | |
f7784b8e | 2540 | { |
f7850c92 | 2541 | int rc; |
f7784b8e | 2542 | |
2cef4deb CB |
2543 | /* If the basics of the memslot do not change, we do not want |
2544 | * to update the gmap. Every update causes several unnecessary | |
2545 | * segment translation exceptions. This is usually handled just | |
2546 | * fine by the normal fault handler + gmap, but it will also | |
2547 | * cause faults on the prefix page of running guest CPUs. | |
2548 | */ | |
2549 | if (old->userspace_addr == mem->userspace_addr && | |
2550 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
2551 | old->npages * PAGE_SIZE == mem->memory_size) | |
2552 | return; | |
598841ca CO |
2553 | |
2554 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
2555 | mem->guest_phys_addr, mem->memory_size); | |
2556 | if (rc) | |
f7850c92 | 2557 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 2558 | return; |
b0c632db HC |
2559 | } |
2560 | ||
b0c632db HC |
2561 | static int __init kvm_s390_init(void) |
2562 | { | |
9d8d5786 | 2563 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
2564 | } |
2565 | ||
2566 | static void __exit kvm_s390_exit(void) | |
2567 | { | |
2568 | kvm_exit(); | |
2569 | } | |
2570 | ||
2571 | module_init(kvm_s390_init); | |
2572 | module_exit(kvm_s390_exit); | |
566af940 CH |
2573 | |
2574 | /* | |
2575 | * Enable autoloading of the kvm module. | |
2576 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
2577 | * since x86 takes a different approach. | |
2578 | */ | |
2579 | #include <linux/miscdevice.h> | |
2580 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
2581 | MODULE_ALIAS("devname:kvm"); |