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Commit | Line | Data |
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b0c632db | 1 | /* |
a53c8fab | 2 | * hosting zSeries kernel virtual machines |
b0c632db | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 2008, 2009 |
b0c632db HC |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
15f36ebd | 14 | * Jason J. Herne <jjherne@us.ibm.com> |
b0c632db HC |
15 | */ |
16 | ||
17 | #include <linux/compiler.h> | |
18 | #include <linux/err.h> | |
19 | #include <linux/fs.h> | |
ca872302 | 20 | #include <linux/hrtimer.h> |
b0c632db HC |
21 | #include <linux/init.h> |
22 | #include <linux/kvm.h> | |
23 | #include <linux/kvm_host.h> | |
24 | #include <linux/module.h> | |
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> |
6d3da241 | 34 | #include <asm/isc.h> |
1526bf9c | 35 | #include <asm/sclp.h> |
8f2abe6a | 36 | #include "kvm-s390.h" |
b0c632db HC |
37 | #include "gaccess.h" |
38 | ||
ea2cdd27 DH |
39 | #define KMSG_COMPONENT "kvm-s390" |
40 | #undef pr_fmt | |
41 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
42 | ||
5786fffa CH |
43 | #define CREATE_TRACE_POINTS |
44 | #include "trace.h" | |
ade38c31 | 45 | #include "trace-s390.h" |
5786fffa | 46 | |
41408c28 | 47 | #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
816c7667 JF |
48 | #define LOCAL_IRQS 32 |
49 | #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ | |
50 | (KVM_MAX_VCPUS + LOCAL_IRQS)) | |
41408c28 | 51 | |
b0c632db HC |
52 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
53 | ||
54 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
55 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 56 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
57 | { "exit_validity", VCPU_STAT(exit_validity) }, |
58 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
59 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
60 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
61 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
62 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
63 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f7819512 | 64 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
ce2e4f0b | 65 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 66 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 67 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
68 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
69 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 70 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 71 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
72 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
73 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
74 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
75 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
76 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
77 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
78 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 79 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
80 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
81 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
82 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
83 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
84 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 85 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
86 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
87 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 88 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
89 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
90 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 91 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 92 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 93 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 94 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 95 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
96 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
97 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 98 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
99 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
100 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
cd7b4b61 | 101 | { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) }, |
5288fbf0 CB |
102 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
103 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
104 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
105 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
106 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
107 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 108 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 109 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 110 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
111 | { NULL } |
112 | }; | |
113 | ||
9d8d5786 MM |
114 | /* upper facilities limit for kvm */ |
115 | unsigned long kvm_s390_fac_list_mask[] = { | |
a3ed8dae | 116 | 0xffe6fffbfcfdfc40UL, |
53df84f8 | 117 | 0x005e800000000000UL, |
9d8d5786 | 118 | }; |
b0c632db | 119 | |
9d8d5786 | 120 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 121 | { |
9d8d5786 MM |
122 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
123 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
124 | } |
125 | ||
9d8d5786 MM |
126 | static struct gmap_notifier gmap_notifier; |
127 | ||
b0c632db | 128 | /* Section: not file related */ |
13a34e06 | 129 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
130 | { |
131 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 132 | return 0; |
b0c632db HC |
133 | } |
134 | ||
2c70fe44 CB |
135 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
136 | ||
b0c632db HC |
137 | int kvm_arch_hardware_setup(void) |
138 | { | |
2c70fe44 CB |
139 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
140 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
141 | return 0; |
142 | } | |
143 | ||
144 | void kvm_arch_hardware_unsetup(void) | |
145 | { | |
2c70fe44 | 146 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
147 | } |
148 | ||
b0c632db HC |
149 | int kvm_arch_init(void *opaque) |
150 | { | |
84877d93 CH |
151 | /* Register floating interrupt controller interface. */ |
152 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
153 | } |
154 | ||
b0c632db HC |
155 | /* Section: device related */ |
156 | long kvm_arch_dev_ioctl(struct file *filp, | |
157 | unsigned int ioctl, unsigned long arg) | |
158 | { | |
159 | if (ioctl == KVM_S390_ENABLE_SIE) | |
160 | return s390_enable_sie(); | |
161 | return -EINVAL; | |
162 | } | |
163 | ||
784aa3d7 | 164 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 165 | { |
d7b0b5eb CO |
166 | int r; |
167 | ||
2bd0ac4e | 168 | switch (ext) { |
d7b0b5eb | 169 | case KVM_CAP_S390_PSW: |
b6cf8788 | 170 | case KVM_CAP_S390_GMAP: |
52e16b18 | 171 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
172 | #ifdef CONFIG_KVM_S390_UCONTROL |
173 | case KVM_CAP_S390_UCONTROL: | |
174 | #endif | |
3c038e6b | 175 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 176 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 177 | case KVM_CAP_ONE_REG: |
d6712df9 | 178 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 179 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 180 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 181 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 182 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 183 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 184 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 185 | case KVM_CAP_MP_STATE: |
47b43c52 | 186 | case KVM_CAP_S390_INJECT_IRQ: |
2444b352 | 187 | case KVM_CAP_S390_USER_SIGP: |
e44fc8c9 | 188 | case KVM_CAP_S390_USER_STSI: |
30ee2a98 | 189 | case KVM_CAP_S390_SKEYS: |
816c7667 | 190 | case KVM_CAP_S390_IRQ_STATE: |
d7b0b5eb CO |
191 | r = 1; |
192 | break; | |
41408c28 TH |
193 | case KVM_CAP_S390_MEM_OP: |
194 | r = MEM_OP_MAX_SIZE; | |
195 | break; | |
e726b1bd CB |
196 | case KVM_CAP_NR_VCPUS: |
197 | case KVM_CAP_MAX_VCPUS: | |
198 | r = KVM_MAX_VCPUS; | |
199 | break; | |
e1e2e605 NW |
200 | case KVM_CAP_NR_MEMSLOTS: |
201 | r = KVM_USER_MEM_SLOTS; | |
202 | break; | |
1526bf9c | 203 | case KVM_CAP_S390_COW: |
abf09bed | 204 | r = MACHINE_HAS_ESOP; |
1526bf9c | 205 | break; |
68c55750 EF |
206 | case KVM_CAP_S390_VECTOR_REGISTERS: |
207 | r = MACHINE_HAS_VX; | |
208 | break; | |
2bd0ac4e | 209 | default: |
d7b0b5eb | 210 | r = 0; |
2bd0ac4e | 211 | } |
d7b0b5eb | 212 | return r; |
b0c632db HC |
213 | } |
214 | ||
15f36ebd JH |
215 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
216 | struct kvm_memory_slot *memslot) | |
217 | { | |
218 | gfn_t cur_gfn, last_gfn; | |
219 | unsigned long address; | |
220 | struct gmap *gmap = kvm->arch.gmap; | |
221 | ||
222 | down_read(&gmap->mm->mmap_sem); | |
223 | /* Loop over all guest pages */ | |
224 | last_gfn = memslot->base_gfn + memslot->npages; | |
225 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
226 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
227 | ||
228 | if (gmap_test_and_clear_dirty(address, gmap)) | |
229 | mark_page_dirty(kvm, cur_gfn); | |
230 | } | |
231 | up_read(&gmap->mm->mmap_sem); | |
232 | } | |
233 | ||
b0c632db HC |
234 | /* Section: vm related */ |
235 | /* | |
236 | * Get (and clear) the dirty memory log for a memory slot. | |
237 | */ | |
238 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
239 | struct kvm_dirty_log *log) | |
240 | { | |
15f36ebd JH |
241 | int r; |
242 | unsigned long n; | |
9f6b8029 | 243 | struct kvm_memslots *slots; |
15f36ebd JH |
244 | struct kvm_memory_slot *memslot; |
245 | int is_dirty = 0; | |
246 | ||
247 | mutex_lock(&kvm->slots_lock); | |
248 | ||
249 | r = -EINVAL; | |
250 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
251 | goto out; | |
252 | ||
9f6b8029 PB |
253 | slots = kvm_memslots(kvm); |
254 | memslot = id_to_memslot(slots, log->slot); | |
15f36ebd JH |
255 | r = -ENOENT; |
256 | if (!memslot->dirty_bitmap) | |
257 | goto out; | |
258 | ||
259 | kvm_s390_sync_dirty_log(kvm, memslot); | |
260 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
261 | if (r) | |
262 | goto out; | |
263 | ||
264 | /* Clear the dirty log */ | |
265 | if (is_dirty) { | |
266 | n = kvm_dirty_bitmap_bytes(memslot); | |
267 | memset(memslot->dirty_bitmap, 0, n); | |
268 | } | |
269 | r = 0; | |
270 | out: | |
271 | mutex_unlock(&kvm->slots_lock); | |
272 | return r; | |
b0c632db HC |
273 | } |
274 | ||
d938dc55 CH |
275 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
276 | { | |
277 | int r; | |
278 | ||
279 | if (cap->flags) | |
280 | return -EINVAL; | |
281 | ||
282 | switch (cap->cap) { | |
84223598 CH |
283 | case KVM_CAP_S390_IRQCHIP: |
284 | kvm->arch.use_irqchip = 1; | |
285 | r = 0; | |
286 | break; | |
2444b352 DH |
287 | case KVM_CAP_S390_USER_SIGP: |
288 | kvm->arch.user_sigp = 1; | |
289 | r = 0; | |
290 | break; | |
68c55750 | 291 | case KVM_CAP_S390_VECTOR_REGISTERS: |
18280d8b MM |
292 | if (MACHINE_HAS_VX) { |
293 | set_kvm_facility(kvm->arch.model.fac->mask, 129); | |
294 | set_kvm_facility(kvm->arch.model.fac->list, 129); | |
295 | r = 0; | |
296 | } else | |
297 | r = -EINVAL; | |
68c55750 | 298 | break; |
e44fc8c9 ET |
299 | case KVM_CAP_S390_USER_STSI: |
300 | kvm->arch.user_stsi = 1; | |
301 | r = 0; | |
302 | break; | |
d938dc55 CH |
303 | default: |
304 | r = -EINVAL; | |
305 | break; | |
306 | } | |
307 | return r; | |
308 | } | |
309 | ||
8c0a7ce6 DD |
310 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
311 | { | |
312 | int ret; | |
313 | ||
314 | switch (attr->attr) { | |
315 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
316 | ret = 0; | |
317 | if (put_user(kvm->arch.gmap->asce_end, (u64 __user *)attr->addr)) | |
318 | ret = -EFAULT; | |
319 | break; | |
320 | default: | |
321 | ret = -ENXIO; | |
322 | break; | |
323 | } | |
324 | return ret; | |
325 | } | |
326 | ||
327 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
328 | { |
329 | int ret; | |
330 | unsigned int idx; | |
331 | switch (attr->attr) { | |
332 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
333 | ret = -EBUSY; | |
334 | mutex_lock(&kvm->lock); | |
335 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
336 | kvm->arch.use_cmma = 1; | |
337 | ret = 0; | |
338 | } | |
339 | mutex_unlock(&kvm->lock); | |
340 | break; | |
341 | case KVM_S390_VM_MEM_CLR_CMMA: | |
342 | mutex_lock(&kvm->lock); | |
343 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 344 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
345 | srcu_read_unlock(&kvm->srcu, idx); |
346 | mutex_unlock(&kvm->lock); | |
347 | ret = 0; | |
348 | break; | |
8c0a7ce6 DD |
349 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
350 | unsigned long new_limit; | |
351 | ||
352 | if (kvm_is_ucontrol(kvm)) | |
353 | return -EINVAL; | |
354 | ||
355 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
356 | return -EFAULT; | |
357 | ||
358 | if (new_limit > kvm->arch.gmap->asce_end) | |
359 | return -E2BIG; | |
360 | ||
361 | ret = -EBUSY; | |
362 | mutex_lock(&kvm->lock); | |
363 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
364 | /* gmap_alloc will round the limit up */ | |
365 | struct gmap *new = gmap_alloc(current->mm, new_limit); | |
366 | ||
367 | if (!new) { | |
368 | ret = -ENOMEM; | |
369 | } else { | |
370 | gmap_free(kvm->arch.gmap); | |
371 | new->private = kvm; | |
372 | kvm->arch.gmap = new; | |
373 | ret = 0; | |
374 | } | |
375 | } | |
376 | mutex_unlock(&kvm->lock); | |
377 | break; | |
378 | } | |
4f718eab DD |
379 | default: |
380 | ret = -ENXIO; | |
381 | break; | |
382 | } | |
383 | return ret; | |
384 | } | |
385 | ||
a374e892 TK |
386 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
387 | ||
388 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
389 | { | |
390 | struct kvm_vcpu *vcpu; | |
391 | int i; | |
392 | ||
9d8d5786 | 393 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
394 | return -EINVAL; |
395 | ||
396 | mutex_lock(&kvm->lock); | |
397 | switch (attr->attr) { | |
398 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
399 | get_random_bytes( | |
400 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
401 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
402 | kvm->arch.crypto.aes_kw = 1; | |
403 | break; | |
404 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
405 | get_random_bytes( | |
406 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
407 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
408 | kvm->arch.crypto.dea_kw = 1; | |
409 | break; | |
410 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
411 | kvm->arch.crypto.aes_kw = 0; | |
412 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
413 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
414 | break; | |
415 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
416 | kvm->arch.crypto.dea_kw = 0; | |
417 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
418 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
419 | break; | |
420 | default: | |
421 | mutex_unlock(&kvm->lock); | |
422 | return -ENXIO; | |
423 | } | |
424 | ||
425 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
426 | kvm_s390_vcpu_crypto_setup(vcpu); | |
427 | exit_sie(vcpu); | |
428 | } | |
429 | mutex_unlock(&kvm->lock); | |
430 | return 0; | |
431 | } | |
432 | ||
72f25020 JH |
433 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
434 | { | |
435 | u8 gtod_high; | |
436 | ||
437 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
438 | sizeof(gtod_high))) | |
439 | return -EFAULT; | |
440 | ||
441 | if (gtod_high != 0) | |
442 | return -EINVAL; | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
448 | { | |
449 | struct kvm_vcpu *cur_vcpu; | |
450 | unsigned int vcpu_idx; | |
451 | u64 host_tod, gtod; | |
452 | int r; | |
453 | ||
454 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
455 | return -EFAULT; | |
456 | ||
457 | r = store_tod_clock(&host_tod); | |
458 | if (r) | |
459 | return r; | |
460 | ||
461 | mutex_lock(&kvm->lock); | |
462 | kvm->arch.epoch = gtod - host_tod; | |
27406cd5 CB |
463 | kvm_s390_vcpu_block_all(kvm); |
464 | kvm_for_each_vcpu(vcpu_idx, cur_vcpu, kvm) | |
72f25020 | 465 | cur_vcpu->arch.sie_block->epoch = kvm->arch.epoch; |
27406cd5 | 466 | kvm_s390_vcpu_unblock_all(kvm); |
72f25020 JH |
467 | mutex_unlock(&kvm->lock); |
468 | return 0; | |
469 | } | |
470 | ||
471 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
472 | { | |
473 | int ret; | |
474 | ||
475 | if (attr->flags) | |
476 | return -EINVAL; | |
477 | ||
478 | switch (attr->attr) { | |
479 | case KVM_S390_VM_TOD_HIGH: | |
480 | ret = kvm_s390_set_tod_high(kvm, attr); | |
481 | break; | |
482 | case KVM_S390_VM_TOD_LOW: | |
483 | ret = kvm_s390_set_tod_low(kvm, attr); | |
484 | break; | |
485 | default: | |
486 | ret = -ENXIO; | |
487 | break; | |
488 | } | |
489 | return ret; | |
490 | } | |
491 | ||
492 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
493 | { | |
494 | u8 gtod_high = 0; | |
495 | ||
496 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
497 | sizeof(gtod_high))) | |
498 | return -EFAULT; | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
503 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
504 | { | |
505 | u64 host_tod, gtod; | |
506 | int r; | |
507 | ||
508 | r = store_tod_clock(&host_tod); | |
509 | if (r) | |
510 | return r; | |
511 | ||
512 | gtod = host_tod + kvm->arch.epoch; | |
513 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) | |
514 | return -EFAULT; | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
520 | { | |
521 | int ret; | |
522 | ||
523 | if (attr->flags) | |
524 | return -EINVAL; | |
525 | ||
526 | switch (attr->attr) { | |
527 | case KVM_S390_VM_TOD_HIGH: | |
528 | ret = kvm_s390_get_tod_high(kvm, attr); | |
529 | break; | |
530 | case KVM_S390_VM_TOD_LOW: | |
531 | ret = kvm_s390_get_tod_low(kvm, attr); | |
532 | break; | |
533 | default: | |
534 | ret = -ENXIO; | |
535 | break; | |
536 | } | |
537 | return ret; | |
538 | } | |
539 | ||
658b6eda MM |
540 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
541 | { | |
542 | struct kvm_s390_vm_cpu_processor *proc; | |
543 | int ret = 0; | |
544 | ||
545 | mutex_lock(&kvm->lock); | |
546 | if (atomic_read(&kvm->online_vcpus)) { | |
547 | ret = -EBUSY; | |
548 | goto out; | |
549 | } | |
550 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
551 | if (!proc) { | |
552 | ret = -ENOMEM; | |
553 | goto out; | |
554 | } | |
555 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
556 | sizeof(*proc))) { | |
557 | memcpy(&kvm->arch.model.cpu_id, &proc->cpuid, | |
558 | sizeof(struct cpuid)); | |
559 | kvm->arch.model.ibc = proc->ibc; | |
981467c9 | 560 | memcpy(kvm->arch.model.fac->list, proc->fac_list, |
658b6eda MM |
561 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
562 | } else | |
563 | ret = -EFAULT; | |
564 | kfree(proc); | |
565 | out: | |
566 | mutex_unlock(&kvm->lock); | |
567 | return ret; | |
568 | } | |
569 | ||
570 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
571 | { | |
572 | int ret = -ENXIO; | |
573 | ||
574 | switch (attr->attr) { | |
575 | case KVM_S390_VM_CPU_PROCESSOR: | |
576 | ret = kvm_s390_set_processor(kvm, attr); | |
577 | break; | |
578 | } | |
579 | return ret; | |
580 | } | |
581 | ||
582 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
583 | { | |
584 | struct kvm_s390_vm_cpu_processor *proc; | |
585 | int ret = 0; | |
586 | ||
587 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
588 | if (!proc) { | |
589 | ret = -ENOMEM; | |
590 | goto out; | |
591 | } | |
592 | memcpy(&proc->cpuid, &kvm->arch.model.cpu_id, sizeof(struct cpuid)); | |
593 | proc->ibc = kvm->arch.model.ibc; | |
981467c9 | 594 | memcpy(&proc->fac_list, kvm->arch.model.fac->list, S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
595 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
596 | ret = -EFAULT; | |
597 | kfree(proc); | |
598 | out: | |
599 | return ret; | |
600 | } | |
601 | ||
602 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
603 | { | |
604 | struct kvm_s390_vm_cpu_machine *mach; | |
605 | int ret = 0; | |
606 | ||
607 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
608 | if (!mach) { | |
609 | ret = -ENOMEM; | |
610 | goto out; | |
611 | } | |
612 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
37c5f6c8 | 613 | mach->ibc = sclp.ibc; |
981467c9 MM |
614 | memcpy(&mach->fac_mask, kvm->arch.model.fac->mask, |
615 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
658b6eda | 616 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
94422ee8 | 617 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
618 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
619 | ret = -EFAULT; | |
620 | kfree(mach); | |
621 | out: | |
622 | return ret; | |
623 | } | |
624 | ||
625 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
626 | { | |
627 | int ret = -ENXIO; | |
628 | ||
629 | switch (attr->attr) { | |
630 | case KVM_S390_VM_CPU_PROCESSOR: | |
631 | ret = kvm_s390_get_processor(kvm, attr); | |
632 | break; | |
633 | case KVM_S390_VM_CPU_MACHINE: | |
634 | ret = kvm_s390_get_machine(kvm, attr); | |
635 | break; | |
636 | } | |
637 | return ret; | |
638 | } | |
639 | ||
f2061656 DD |
640 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
641 | { | |
642 | int ret; | |
643 | ||
644 | switch (attr->group) { | |
4f718eab | 645 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 646 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 647 | break; |
72f25020 JH |
648 | case KVM_S390_VM_TOD: |
649 | ret = kvm_s390_set_tod(kvm, attr); | |
650 | break; | |
658b6eda MM |
651 | case KVM_S390_VM_CPU_MODEL: |
652 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
653 | break; | |
a374e892 TK |
654 | case KVM_S390_VM_CRYPTO: |
655 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
656 | break; | |
f2061656 DD |
657 | default: |
658 | ret = -ENXIO; | |
659 | break; | |
660 | } | |
661 | ||
662 | return ret; | |
663 | } | |
664 | ||
665 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
666 | { | |
8c0a7ce6 DD |
667 | int ret; |
668 | ||
669 | switch (attr->group) { | |
670 | case KVM_S390_VM_MEM_CTRL: | |
671 | ret = kvm_s390_get_mem_control(kvm, attr); | |
672 | break; | |
72f25020 JH |
673 | case KVM_S390_VM_TOD: |
674 | ret = kvm_s390_get_tod(kvm, attr); | |
675 | break; | |
658b6eda MM |
676 | case KVM_S390_VM_CPU_MODEL: |
677 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
678 | break; | |
8c0a7ce6 DD |
679 | default: |
680 | ret = -ENXIO; | |
681 | break; | |
682 | } | |
683 | ||
684 | return ret; | |
f2061656 DD |
685 | } |
686 | ||
687 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
688 | { | |
689 | int ret; | |
690 | ||
691 | switch (attr->group) { | |
4f718eab DD |
692 | case KVM_S390_VM_MEM_CTRL: |
693 | switch (attr->attr) { | |
694 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
695 | case KVM_S390_VM_MEM_CLR_CMMA: | |
8c0a7ce6 | 696 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
697 | ret = 0; |
698 | break; | |
699 | default: | |
700 | ret = -ENXIO; | |
701 | break; | |
702 | } | |
703 | break; | |
72f25020 JH |
704 | case KVM_S390_VM_TOD: |
705 | switch (attr->attr) { | |
706 | case KVM_S390_VM_TOD_LOW: | |
707 | case KVM_S390_VM_TOD_HIGH: | |
708 | ret = 0; | |
709 | break; | |
710 | default: | |
711 | ret = -ENXIO; | |
712 | break; | |
713 | } | |
714 | break; | |
658b6eda MM |
715 | case KVM_S390_VM_CPU_MODEL: |
716 | switch (attr->attr) { | |
717 | case KVM_S390_VM_CPU_PROCESSOR: | |
718 | case KVM_S390_VM_CPU_MACHINE: | |
719 | ret = 0; | |
720 | break; | |
721 | default: | |
722 | ret = -ENXIO; | |
723 | break; | |
724 | } | |
725 | break; | |
a374e892 TK |
726 | case KVM_S390_VM_CRYPTO: |
727 | switch (attr->attr) { | |
728 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
729 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
730 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
731 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
732 | ret = 0; | |
733 | break; | |
734 | default: | |
735 | ret = -ENXIO; | |
736 | break; | |
737 | } | |
738 | break; | |
f2061656 DD |
739 | default: |
740 | ret = -ENXIO; | |
741 | break; | |
742 | } | |
743 | ||
744 | return ret; | |
745 | } | |
746 | ||
30ee2a98 JH |
747 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
748 | { | |
749 | uint8_t *keys; | |
750 | uint64_t hva; | |
751 | unsigned long curkey; | |
752 | int i, r = 0; | |
753 | ||
754 | if (args->flags != 0) | |
755 | return -EINVAL; | |
756 | ||
757 | /* Is this guest using storage keys? */ | |
758 | if (!mm_use_skey(current->mm)) | |
759 | return KVM_S390_GET_SKEYS_NONE; | |
760 | ||
761 | /* Enforce sane limit on memory allocation */ | |
762 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
763 | return -EINVAL; | |
764 | ||
765 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
766 | GFP_KERNEL | __GFP_NOWARN); | |
767 | if (!keys) | |
768 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
769 | if (!keys) | |
770 | return -ENOMEM; | |
771 | ||
772 | for (i = 0; i < args->count; i++) { | |
773 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
774 | if (kvm_is_error_hva(hva)) { | |
775 | r = -EFAULT; | |
776 | goto out; | |
777 | } | |
778 | ||
779 | curkey = get_guest_storage_key(current->mm, hva); | |
780 | if (IS_ERR_VALUE(curkey)) { | |
781 | r = curkey; | |
782 | goto out; | |
783 | } | |
784 | keys[i] = curkey; | |
785 | } | |
786 | ||
787 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
788 | sizeof(uint8_t) * args->count); | |
789 | if (r) | |
790 | r = -EFAULT; | |
791 | out: | |
792 | kvfree(keys); | |
793 | return r; | |
794 | } | |
795 | ||
796 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
797 | { | |
798 | uint8_t *keys; | |
799 | uint64_t hva; | |
800 | int i, r = 0; | |
801 | ||
802 | if (args->flags != 0) | |
803 | return -EINVAL; | |
804 | ||
805 | /* Enforce sane limit on memory allocation */ | |
806 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
807 | return -EINVAL; | |
808 | ||
809 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
810 | GFP_KERNEL | __GFP_NOWARN); | |
811 | if (!keys) | |
812 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
813 | if (!keys) | |
814 | return -ENOMEM; | |
815 | ||
816 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
817 | sizeof(uint8_t) * args->count); | |
818 | if (r) { | |
819 | r = -EFAULT; | |
820 | goto out; | |
821 | } | |
822 | ||
823 | /* Enable storage key handling for the guest */ | |
824 | s390_enable_skey(); | |
825 | ||
826 | for (i = 0; i < args->count; i++) { | |
827 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
828 | if (kvm_is_error_hva(hva)) { | |
829 | r = -EFAULT; | |
830 | goto out; | |
831 | } | |
832 | ||
833 | /* Lowest order bit is reserved */ | |
834 | if (keys[i] & 0x01) { | |
835 | r = -EINVAL; | |
836 | goto out; | |
837 | } | |
838 | ||
839 | r = set_guest_storage_key(current->mm, hva, | |
840 | (unsigned long)keys[i], 0); | |
841 | if (r) | |
842 | goto out; | |
843 | } | |
844 | out: | |
845 | kvfree(keys); | |
846 | return r; | |
847 | } | |
848 | ||
b0c632db HC |
849 | long kvm_arch_vm_ioctl(struct file *filp, |
850 | unsigned int ioctl, unsigned long arg) | |
851 | { | |
852 | struct kvm *kvm = filp->private_data; | |
853 | void __user *argp = (void __user *)arg; | |
f2061656 | 854 | struct kvm_device_attr attr; |
b0c632db HC |
855 | int r; |
856 | ||
857 | switch (ioctl) { | |
ba5c1e9b CO |
858 | case KVM_S390_INTERRUPT: { |
859 | struct kvm_s390_interrupt s390int; | |
860 | ||
861 | r = -EFAULT; | |
862 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
863 | break; | |
864 | r = kvm_s390_inject_vm(kvm, &s390int); | |
865 | break; | |
866 | } | |
d938dc55 CH |
867 | case KVM_ENABLE_CAP: { |
868 | struct kvm_enable_cap cap; | |
869 | r = -EFAULT; | |
870 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
871 | break; | |
872 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
873 | break; | |
874 | } | |
84223598 CH |
875 | case KVM_CREATE_IRQCHIP: { |
876 | struct kvm_irq_routing_entry routing; | |
877 | ||
878 | r = -EINVAL; | |
879 | if (kvm->arch.use_irqchip) { | |
880 | /* Set up dummy routing. */ | |
881 | memset(&routing, 0, sizeof(routing)); | |
882 | kvm_set_irq_routing(kvm, &routing, 0, 0); | |
883 | r = 0; | |
884 | } | |
885 | break; | |
886 | } | |
f2061656 DD |
887 | case KVM_SET_DEVICE_ATTR: { |
888 | r = -EFAULT; | |
889 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
890 | break; | |
891 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
892 | break; | |
893 | } | |
894 | case KVM_GET_DEVICE_ATTR: { | |
895 | r = -EFAULT; | |
896 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
897 | break; | |
898 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
899 | break; | |
900 | } | |
901 | case KVM_HAS_DEVICE_ATTR: { | |
902 | r = -EFAULT; | |
903 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
904 | break; | |
905 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
906 | break; | |
907 | } | |
30ee2a98 JH |
908 | case KVM_S390_GET_SKEYS: { |
909 | struct kvm_s390_skeys args; | |
910 | ||
911 | r = -EFAULT; | |
912 | if (copy_from_user(&args, argp, | |
913 | sizeof(struct kvm_s390_skeys))) | |
914 | break; | |
915 | r = kvm_s390_get_skeys(kvm, &args); | |
916 | break; | |
917 | } | |
918 | case KVM_S390_SET_SKEYS: { | |
919 | struct kvm_s390_skeys args; | |
920 | ||
921 | r = -EFAULT; | |
922 | if (copy_from_user(&args, argp, | |
923 | sizeof(struct kvm_s390_skeys))) | |
924 | break; | |
925 | r = kvm_s390_set_skeys(kvm, &args); | |
926 | break; | |
927 | } | |
b0c632db | 928 | default: |
367e1319 | 929 | r = -ENOTTY; |
b0c632db HC |
930 | } |
931 | ||
932 | return r; | |
933 | } | |
934 | ||
45c9b47c TK |
935 | static int kvm_s390_query_ap_config(u8 *config) |
936 | { | |
937 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 938 | u32 cc = 0; |
45c9b47c | 939 | |
86044c8c | 940 | memset(config, 0, 128); |
45c9b47c TK |
941 | asm volatile( |
942 | "lgr 0,%1\n" | |
943 | "lgr 2,%2\n" | |
944 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 945 | "0: ipm %0\n" |
45c9b47c | 946 | "srl %0,28\n" |
86044c8c CB |
947 | "1:\n" |
948 | EX_TABLE(0b, 1b) | |
949 | : "+r" (cc) | |
45c9b47c TK |
950 | : "r" (fcn_code), "r" (config) |
951 | : "cc", "0", "2", "memory" | |
952 | ); | |
953 | ||
954 | return cc; | |
955 | } | |
956 | ||
957 | static int kvm_s390_apxa_installed(void) | |
958 | { | |
959 | u8 config[128]; | |
960 | int cc; | |
961 | ||
962 | if (test_facility(2) && test_facility(12)) { | |
963 | cc = kvm_s390_query_ap_config(config); | |
964 | ||
965 | if (cc) | |
966 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
967 | else | |
968 | return config[0] & 0x40; | |
969 | } | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
974 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
975 | { | |
976 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
977 | ||
978 | if (kvm_s390_apxa_installed()) | |
979 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
980 | else | |
981 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
982 | } | |
983 | ||
9d8d5786 MM |
984 | static void kvm_s390_get_cpu_id(struct cpuid *cpu_id) |
985 | { | |
986 | get_cpu_id(cpu_id); | |
987 | cpu_id->version = 0xff; | |
988 | } | |
989 | ||
5102ee87 TK |
990 | static int kvm_s390_crypto_init(struct kvm *kvm) |
991 | { | |
9d8d5786 | 992 | if (!test_kvm_facility(kvm, 76)) |
5102ee87 TK |
993 | return 0; |
994 | ||
995 | kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb), | |
996 | GFP_KERNEL | GFP_DMA); | |
997 | if (!kvm->arch.crypto.crycb) | |
998 | return -ENOMEM; | |
999 | ||
45c9b47c | 1000 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 1001 | |
ed6f76b4 TK |
1002 | /* Enable AES/DEA protected key functions by default */ |
1003 | kvm->arch.crypto.aes_kw = 1; | |
1004 | kvm->arch.crypto.dea_kw = 1; | |
1005 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
1006 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
1007 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
1008 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
a374e892 | 1009 | |
5102ee87 TK |
1010 | return 0; |
1011 | } | |
1012 | ||
e08b9637 | 1013 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1014 | { |
9d8d5786 | 1015 | int i, rc; |
b0c632db | 1016 | char debug_name[16]; |
f6c137ff | 1017 | static unsigned long sca_offset; |
b0c632db | 1018 | |
e08b9637 CO |
1019 | rc = -EINVAL; |
1020 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1021 | if (type & ~KVM_VM_S390_UCONTROL) | |
1022 | goto out_err; | |
1023 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1024 | goto out_err; | |
1025 | #else | |
1026 | if (type) | |
1027 | goto out_err; | |
1028 | #endif | |
1029 | ||
b0c632db HC |
1030 | rc = s390_enable_sie(); |
1031 | if (rc) | |
d89f5eff | 1032 | goto out_err; |
b0c632db | 1033 | |
b290411a CO |
1034 | rc = -ENOMEM; |
1035 | ||
b0c632db HC |
1036 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
1037 | if (!kvm->arch.sca) | |
d89f5eff | 1038 | goto out_err; |
f6c137ff CB |
1039 | spin_lock(&kvm_lock); |
1040 | sca_offset = (sca_offset + 16) & 0x7f0; | |
1041 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); | |
1042 | spin_unlock(&kvm_lock); | |
b0c632db HC |
1043 | |
1044 | sprintf(debug_name, "kvm-%u", current->pid); | |
1045 | ||
1046 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
1047 | if (!kvm->arch.dbf) | |
40f5b735 | 1048 | goto out_err; |
b0c632db | 1049 | |
9d8d5786 MM |
1050 | /* |
1051 | * The architectural maximum amount of facilities is 16 kbit. To store | |
1052 | * this amount, 2 kbyte of memory is required. Thus we need a full | |
981467c9 MM |
1053 | * page to hold the guest facility list (arch.model.fac->list) and the |
1054 | * facility mask (arch.model.fac->mask). Its address size has to be | |
9d8d5786 MM |
1055 | * 31 bits and word aligned. |
1056 | */ | |
1057 | kvm->arch.model.fac = | |
981467c9 | 1058 | (struct kvm_s390_fac *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
9d8d5786 | 1059 | if (!kvm->arch.model.fac) |
40f5b735 | 1060 | goto out_err; |
9d8d5786 | 1061 | |
fb5bf93f | 1062 | /* Populate the facility mask initially. */ |
981467c9 | 1063 | memcpy(kvm->arch.model.fac->mask, S390_lowcore.stfle_fac_list, |
94422ee8 | 1064 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
9d8d5786 MM |
1065 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1066 | if (i < kvm_s390_fac_list_mask_size()) | |
981467c9 | 1067 | kvm->arch.model.fac->mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1068 | else |
981467c9 | 1069 | kvm->arch.model.fac->mask[i] = 0UL; |
9d8d5786 MM |
1070 | } |
1071 | ||
981467c9 MM |
1072 | /* Populate the facility list initially. */ |
1073 | memcpy(kvm->arch.model.fac->list, kvm->arch.model.fac->mask, | |
1074 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
1075 | ||
9d8d5786 | 1076 | kvm_s390_get_cpu_id(&kvm->arch.model.cpu_id); |
37c5f6c8 | 1077 | kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
9d8d5786 | 1078 | |
5102ee87 | 1079 | if (kvm_s390_crypto_init(kvm) < 0) |
40f5b735 | 1080 | goto out_err; |
5102ee87 | 1081 | |
ba5c1e9b | 1082 | spin_lock_init(&kvm->arch.float_int.lock); |
6d3da241 JF |
1083 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1084 | INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); | |
8a242234 | 1085 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1086 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1087 | |
b0c632db HC |
1088 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
1089 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
1090 | ||
e08b9637 CO |
1091 | if (type & KVM_VM_S390_UCONTROL) { |
1092 | kvm->arch.gmap = NULL; | |
1093 | } else { | |
0349985a | 1094 | kvm->arch.gmap = gmap_alloc(current->mm, (1UL << 44) - 1); |
e08b9637 | 1095 | if (!kvm->arch.gmap) |
40f5b735 | 1096 | goto out_err; |
2c70fe44 | 1097 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1098 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1099 | } |
fa6b7fe9 CH |
1100 | |
1101 | kvm->arch.css_support = 0; | |
84223598 | 1102 | kvm->arch.use_irqchip = 0; |
72f25020 | 1103 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1104 | |
8ad35755 DH |
1105 | spin_lock_init(&kvm->arch.start_stop_lock); |
1106 | ||
d89f5eff | 1107 | return 0; |
40f5b735 | 1108 | out_err: |
5102ee87 | 1109 | kfree(kvm->arch.crypto.crycb); |
9d8d5786 | 1110 | free_page((unsigned long)kvm->arch.model.fac); |
598841ca | 1111 | debug_unregister(kvm->arch.dbf); |
b0c632db | 1112 | free_page((unsigned long)(kvm->arch.sca)); |
d89f5eff | 1113 | return rc; |
b0c632db HC |
1114 | } |
1115 | ||
d329c035 CB |
1116 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1117 | { | |
1118 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1119 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1120 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1121 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
1122 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
1123 | clear_bit(63 - vcpu->vcpu_id, | |
1124 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
1125 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
1126 | (__u64) vcpu->arch.sie_block) | |
1127 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
1128 | } | |
abf4a71e | 1129 | smp_mb(); |
27e0393f CO |
1130 | |
1131 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1132 | gmap_free(vcpu->arch.gmap); | |
1133 | ||
b31605c1 DD |
1134 | if (kvm_s390_cmma_enabled(vcpu->kvm)) |
1135 | kvm_s390_vcpu_unsetup_cmma(vcpu); | |
d329c035 | 1136 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1137 | |
6692cef3 | 1138 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1139 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1140 | } |
1141 | ||
1142 | static void kvm_free_vcpus(struct kvm *kvm) | |
1143 | { | |
1144 | unsigned int i; | |
988a2cae | 1145 | struct kvm_vcpu *vcpu; |
d329c035 | 1146 | |
988a2cae GN |
1147 | kvm_for_each_vcpu(i, vcpu, kvm) |
1148 | kvm_arch_vcpu_destroy(vcpu); | |
1149 | ||
1150 | mutex_lock(&kvm->lock); | |
1151 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1152 | kvm->vcpus[i] = NULL; | |
1153 | ||
1154 | atomic_set(&kvm->online_vcpus, 0); | |
1155 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1156 | } |
1157 | ||
b0c632db HC |
1158 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1159 | { | |
d329c035 | 1160 | kvm_free_vcpus(kvm); |
9d8d5786 | 1161 | free_page((unsigned long)kvm->arch.model.fac); |
b0c632db | 1162 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 1163 | debug_unregister(kvm->arch.dbf); |
5102ee87 | 1164 | kfree(kvm->arch.crypto.crycb); |
27e0393f CO |
1165 | if (!kvm_is_ucontrol(kvm)) |
1166 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 1167 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1168 | kvm_s390_clear_float_irqs(kvm); |
b0c632db HC |
1169 | } |
1170 | ||
1171 | /* Section: vcpu related */ | |
dafd032a DD |
1172 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1173 | { | |
1174 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); | |
1175 | if (!vcpu->arch.gmap) | |
1176 | return -ENOMEM; | |
1177 | vcpu->arch.gmap->private = vcpu->kvm; | |
1178 | ||
1179 | return 0; | |
1180 | } | |
1181 | ||
b0c632db HC |
1182 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1183 | { | |
3c038e6b DD |
1184 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1185 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1186 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1187 | KVM_SYNC_GPRS | | |
9eed0735 | 1188 | KVM_SYNC_ACRS | |
b028ee3e DH |
1189 | KVM_SYNC_CRS | |
1190 | KVM_SYNC_ARCH0 | | |
1191 | KVM_SYNC_PFAULT; | |
68c55750 EF |
1192 | if (test_kvm_facility(vcpu->kvm, 129)) |
1193 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; | |
dafd032a DD |
1194 | |
1195 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1196 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1197 | ||
b0c632db HC |
1198 | return 0; |
1199 | } | |
1200 | ||
b0c632db HC |
1201 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1202 | { | |
4725c860 | 1203 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
18280d8b | 1204 | if (test_kvm_facility(vcpu->kvm, 129)) |
68c55750 EF |
1205 | save_vx_regs((__vector128 *)&vcpu->arch.host_vregs->vrs); |
1206 | else | |
1207 | save_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db | 1208 | save_access_regs(vcpu->arch.host_acrs); |
18280d8b | 1209 | if (test_kvm_facility(vcpu->kvm, 129)) { |
68c55750 EF |
1210 | restore_fp_ctl(&vcpu->run->s.regs.fpc); |
1211 | restore_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs); | |
1212 | } else { | |
1213 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1214 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1215 | } | |
59674c1a | 1216 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 1217 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 1218 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
1219 | } |
1220 | ||
1221 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1222 | { | |
9e6dabef | 1223 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 1224 | gmap_disable(vcpu->arch.gmap); |
18280d8b | 1225 | if (test_kvm_facility(vcpu->kvm, 129)) { |
68c55750 EF |
1226 | save_fp_ctl(&vcpu->run->s.regs.fpc); |
1227 | save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs); | |
1228 | } else { | |
1229 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1230 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1231 | } | |
59674c1a | 1232 | save_access_regs(vcpu->run->s.regs.acrs); |
4725c860 | 1233 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
18280d8b | 1234 | if (test_kvm_facility(vcpu->kvm, 129)) |
68c55750 EF |
1235 | restore_vx_regs((__vector128 *)&vcpu->arch.host_vregs->vrs); |
1236 | else | |
1237 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db HC |
1238 | restore_access_regs(vcpu->arch.host_acrs); |
1239 | } | |
1240 | ||
1241 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1242 | { | |
1243 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1244 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1245 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1246 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
1247 | vcpu->arch.sie_block->cputm = 0UL; |
1248 | vcpu->arch.sie_block->ckc = 0UL; | |
1249 | vcpu->arch.sie_block->todpr = 0; | |
1250 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1251 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1252 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
1253 | vcpu->arch.guest_fpregs.fpc = 0; | |
1254 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
1255 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 1256 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1257 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1258 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1259 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1260 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1261 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1262 | } |
1263 | ||
31928aa5 | 1264 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1265 | { |
72f25020 JH |
1266 | mutex_lock(&vcpu->kvm->lock); |
1267 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; | |
1268 | mutex_unlock(&vcpu->kvm->lock); | |
dafd032a DD |
1269 | if (!kvm_is_ucontrol(vcpu->kvm)) |
1270 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; | |
42897d86 MT |
1271 | } |
1272 | ||
5102ee87 TK |
1273 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1274 | { | |
9d8d5786 | 1275 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1276 | return; |
1277 | ||
a374e892 TK |
1278 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1279 | ||
1280 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1281 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1282 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1283 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1284 | ||
5102ee87 TK |
1285 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1286 | } | |
1287 | ||
b31605c1 DD |
1288 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1289 | { | |
1290 | free_page(vcpu->arch.sie_block->cbrlo); | |
1291 | vcpu->arch.sie_block->cbrlo = 0; | |
1292 | } | |
1293 | ||
1294 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1295 | { | |
1296 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1297 | if (!vcpu->arch.sie_block->cbrlo) | |
1298 | return -ENOMEM; | |
1299 | ||
1300 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1301 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1302 | return 0; | |
1303 | } | |
1304 | ||
91520f1a MM |
1305 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
1306 | { | |
1307 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
1308 | ||
1309 | vcpu->arch.cpu_id = model->cpu_id; | |
1310 | vcpu->arch.sie_block->ibc = model->ibc; | |
1311 | vcpu->arch.sie_block->fac = (int) (long) model->fac->list; | |
1312 | } | |
1313 | ||
b0c632db HC |
1314 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1315 | { | |
b31605c1 | 1316 | int rc = 0; |
b31288fa | 1317 | |
9e6dabef CH |
1318 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1319 | CPUSTAT_SM | | |
a4a4f191 GH |
1320 | CPUSTAT_STOPPED); |
1321 | ||
53df84f8 GH |
1322 | if (test_kvm_facility(vcpu->kvm, 78)) |
1323 | atomic_set_mask(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags); | |
1324 | else if (test_kvm_facility(vcpu->kvm, 8)) | |
a4a4f191 GH |
1325 | atomic_set_mask(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); |
1326 | ||
91520f1a MM |
1327 | kvm_s390_vcpu_setup_model(vcpu); |
1328 | ||
fc34531d | 1329 | vcpu->arch.sie_block->ecb = 6; |
9d8d5786 | 1330 | if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1331 | vcpu->arch.sie_block->ecb |= 0x10; |
1332 | ||
69d0d3a3 | 1333 | vcpu->arch.sie_block->ecb2 = 8; |
ea5f4969 | 1334 | vcpu->arch.sie_block->eca = 0xC1002000U; |
37c5f6c8 | 1335 | if (sclp.has_siif) |
217a4406 | 1336 | vcpu->arch.sie_block->eca |= 1; |
37c5f6c8 | 1337 | if (sclp.has_sigpif) |
ea5f4969 | 1338 | vcpu->arch.sie_block->eca |= 0x10000000U; |
18280d8b | 1339 | if (test_kvm_facility(vcpu->kvm, 129)) { |
13211ea7 EF |
1340 | vcpu->arch.sie_block->eca |= 0x00020000; |
1341 | vcpu->arch.sie_block->ecd |= 0x20000000; | |
1342 | } | |
492d8642 | 1343 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
5a5e6536 | 1344 | |
b31605c1 DD |
1345 | if (kvm_s390_cmma_enabled(vcpu->kvm)) { |
1346 | rc = kvm_s390_vcpu_setup_cmma(vcpu); | |
1347 | if (rc) | |
1348 | return rc; | |
b31288fa | 1349 | } |
0ac96caf | 1350 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 1351 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 1352 | |
5102ee87 TK |
1353 | kvm_s390_vcpu_crypto_setup(vcpu); |
1354 | ||
b31605c1 | 1355 | return rc; |
b0c632db HC |
1356 | } |
1357 | ||
1358 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1359 | unsigned int id) | |
1360 | { | |
4d47555a | 1361 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 1362 | struct sie_page *sie_page; |
4d47555a CO |
1363 | int rc = -EINVAL; |
1364 | ||
1365 | if (id >= KVM_MAX_VCPUS) | |
1366 | goto out; | |
1367 | ||
1368 | rc = -ENOMEM; | |
b0c632db | 1369 | |
b110feaf | 1370 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 1371 | if (!vcpu) |
4d47555a | 1372 | goto out; |
b0c632db | 1373 | |
7feb6bb8 MM |
1374 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
1375 | if (!sie_page) | |
b0c632db HC |
1376 | goto out_free_cpu; |
1377 | ||
7feb6bb8 MM |
1378 | vcpu->arch.sie_block = &sie_page->sie_block; |
1379 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
68c55750 | 1380 | vcpu->arch.host_vregs = &sie_page->vregs; |
7feb6bb8 | 1381 | |
b0c632db | 1382 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
1383 | if (!kvm_is_ucontrol(kvm)) { |
1384 | if (!kvm->arch.sca) { | |
1385 | WARN_ON_ONCE(1); | |
1386 | goto out_free_cpu; | |
1387 | } | |
1388 | if (!kvm->arch.sca->cpu[id].sda) | |
1389 | kvm->arch.sca->cpu[id].sda = | |
1390 | (__u64) vcpu->arch.sie_block; | |
1391 | vcpu->arch.sie_block->scaoh = | |
1392 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
1393 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
1394 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
1395 | } | |
b0c632db | 1396 | |
ba5c1e9b | 1397 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 1398 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 1399 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 1400 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 1401 | |
b0c632db HC |
1402 | rc = kvm_vcpu_init(vcpu, kvm, id); |
1403 | if (rc) | |
7b06bf2f | 1404 | goto out_free_sie_block; |
b0c632db HC |
1405 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
1406 | vcpu->arch.sie_block); | |
ade38c31 | 1407 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 1408 | |
b0c632db | 1409 | return vcpu; |
7b06bf2f WY |
1410 | out_free_sie_block: |
1411 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 1412 | out_free_cpu: |
b110feaf | 1413 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 1414 | out: |
b0c632db HC |
1415 | return ERR_PTR(rc); |
1416 | } | |
1417 | ||
b0c632db HC |
1418 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
1419 | { | |
9a022067 | 1420 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
1421 | } |
1422 | ||
27406cd5 | 1423 | void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
49b99e1e CB |
1424 | { |
1425 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
61a6df54 | 1426 | exit_sie(vcpu); |
49b99e1e CB |
1427 | } |
1428 | ||
27406cd5 | 1429 | void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
49b99e1e CB |
1430 | { |
1431 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
1432 | } | |
1433 | ||
8e236546 CB |
1434 | static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
1435 | { | |
1436 | atomic_set_mask(PROG_REQUEST, &vcpu->arch.sie_block->prog20); | |
61a6df54 | 1437 | exit_sie(vcpu); |
8e236546 CB |
1438 | } |
1439 | ||
1440 | static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) | |
1441 | { | |
1442 | atomic_clear_mask(PROG_REQUEST, &vcpu->arch.sie_block->prog20); | |
1443 | } | |
1444 | ||
49b99e1e CB |
1445 | /* |
1446 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
1447 | * If the CPU is not running (e.g. waiting as idle) the function will | |
1448 | * return immediately. */ | |
1449 | void exit_sie(struct kvm_vcpu *vcpu) | |
1450 | { | |
1451 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
1452 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
1453 | cpu_relax(); | |
1454 | } | |
1455 | ||
8e236546 CB |
1456 | /* Kick a guest cpu out of SIE to process a request synchronously */ |
1457 | void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) | |
49b99e1e | 1458 | { |
8e236546 CB |
1459 | kvm_make_request(req, vcpu); |
1460 | kvm_s390_vcpu_request(vcpu); | |
49b99e1e CB |
1461 | } |
1462 | ||
2c70fe44 CB |
1463 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
1464 | { | |
1465 | int i; | |
1466 | struct kvm *kvm = gmap->private; | |
1467 | struct kvm_vcpu *vcpu; | |
1468 | ||
1469 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1470 | /* match against both prefix pages */ | |
fda902cb | 1471 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 | 1472 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
8e236546 | 1473 | kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
2c70fe44 CB |
1474 | } |
1475 | } | |
1476 | } | |
1477 | ||
b6d33834 CD |
1478 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
1479 | { | |
1480 | /* kvm common code refers to this, but never calls it */ | |
1481 | BUG(); | |
1482 | return 0; | |
1483 | } | |
1484 | ||
14eebd91 CO |
1485 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
1486 | struct kvm_one_reg *reg) | |
1487 | { | |
1488 | int r = -EINVAL; | |
1489 | ||
1490 | switch (reg->id) { | |
29b7c71b CO |
1491 | case KVM_REG_S390_TODPR: |
1492 | r = put_user(vcpu->arch.sie_block->todpr, | |
1493 | (u32 __user *)reg->addr); | |
1494 | break; | |
1495 | case KVM_REG_S390_EPOCHDIFF: | |
1496 | r = put_user(vcpu->arch.sie_block->epoch, | |
1497 | (u64 __user *)reg->addr); | |
1498 | break; | |
46a6dd1c J |
1499 | case KVM_REG_S390_CPU_TIMER: |
1500 | r = put_user(vcpu->arch.sie_block->cputm, | |
1501 | (u64 __user *)reg->addr); | |
1502 | break; | |
1503 | case KVM_REG_S390_CLOCK_COMP: | |
1504 | r = put_user(vcpu->arch.sie_block->ckc, | |
1505 | (u64 __user *)reg->addr); | |
1506 | break; | |
536336c2 DD |
1507 | case KVM_REG_S390_PFTOKEN: |
1508 | r = put_user(vcpu->arch.pfault_token, | |
1509 | (u64 __user *)reg->addr); | |
1510 | break; | |
1511 | case KVM_REG_S390_PFCOMPARE: | |
1512 | r = put_user(vcpu->arch.pfault_compare, | |
1513 | (u64 __user *)reg->addr); | |
1514 | break; | |
1515 | case KVM_REG_S390_PFSELECT: | |
1516 | r = put_user(vcpu->arch.pfault_select, | |
1517 | (u64 __user *)reg->addr); | |
1518 | break; | |
672550fb CB |
1519 | case KVM_REG_S390_PP: |
1520 | r = put_user(vcpu->arch.sie_block->pp, | |
1521 | (u64 __user *)reg->addr); | |
1522 | break; | |
afa45ff5 CB |
1523 | case KVM_REG_S390_GBEA: |
1524 | r = put_user(vcpu->arch.sie_block->gbea, | |
1525 | (u64 __user *)reg->addr); | |
1526 | break; | |
14eebd91 CO |
1527 | default: |
1528 | break; | |
1529 | } | |
1530 | ||
1531 | return r; | |
1532 | } | |
1533 | ||
1534 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
1535 | struct kvm_one_reg *reg) | |
1536 | { | |
1537 | int r = -EINVAL; | |
1538 | ||
1539 | switch (reg->id) { | |
29b7c71b CO |
1540 | case KVM_REG_S390_TODPR: |
1541 | r = get_user(vcpu->arch.sie_block->todpr, | |
1542 | (u32 __user *)reg->addr); | |
1543 | break; | |
1544 | case KVM_REG_S390_EPOCHDIFF: | |
1545 | r = get_user(vcpu->arch.sie_block->epoch, | |
1546 | (u64 __user *)reg->addr); | |
1547 | break; | |
46a6dd1c J |
1548 | case KVM_REG_S390_CPU_TIMER: |
1549 | r = get_user(vcpu->arch.sie_block->cputm, | |
1550 | (u64 __user *)reg->addr); | |
1551 | break; | |
1552 | case KVM_REG_S390_CLOCK_COMP: | |
1553 | r = get_user(vcpu->arch.sie_block->ckc, | |
1554 | (u64 __user *)reg->addr); | |
1555 | break; | |
536336c2 DD |
1556 | case KVM_REG_S390_PFTOKEN: |
1557 | r = get_user(vcpu->arch.pfault_token, | |
1558 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
1559 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
1560 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
1561 | break; |
1562 | case KVM_REG_S390_PFCOMPARE: | |
1563 | r = get_user(vcpu->arch.pfault_compare, | |
1564 | (u64 __user *)reg->addr); | |
1565 | break; | |
1566 | case KVM_REG_S390_PFSELECT: | |
1567 | r = get_user(vcpu->arch.pfault_select, | |
1568 | (u64 __user *)reg->addr); | |
1569 | break; | |
672550fb CB |
1570 | case KVM_REG_S390_PP: |
1571 | r = get_user(vcpu->arch.sie_block->pp, | |
1572 | (u64 __user *)reg->addr); | |
1573 | break; | |
afa45ff5 CB |
1574 | case KVM_REG_S390_GBEA: |
1575 | r = get_user(vcpu->arch.sie_block->gbea, | |
1576 | (u64 __user *)reg->addr); | |
1577 | break; | |
14eebd91 CO |
1578 | default: |
1579 | break; | |
1580 | } | |
1581 | ||
1582 | return r; | |
1583 | } | |
b6d33834 | 1584 | |
b0c632db HC |
1585 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
1586 | { | |
b0c632db | 1587 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
1588 | return 0; |
1589 | } | |
1590 | ||
1591 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1592 | { | |
5a32c1af | 1593 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
1594 | return 0; |
1595 | } | |
1596 | ||
1597 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1598 | { | |
5a32c1af | 1599 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
1600 | return 0; |
1601 | } | |
1602 | ||
1603 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
1604 | struct kvm_sregs *sregs) | |
1605 | { | |
59674c1a | 1606 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 1607 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 1608 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
1609 | return 0; |
1610 | } | |
1611 | ||
1612 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
1613 | struct kvm_sregs *sregs) | |
1614 | { | |
59674c1a | 1615 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 1616 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
1617 | return 0; |
1618 | } | |
1619 | ||
1620 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1621 | { | |
4725c860 MS |
1622 | if (test_fp_ctl(fpu->fpc)) |
1623 | return -EINVAL; | |
b0c632db | 1624 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 MS |
1625 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
1626 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1627 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
b0c632db HC |
1628 | return 0; |
1629 | } | |
1630 | ||
1631 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1632 | { | |
b0c632db HC |
1633 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
1634 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
1635 | return 0; |
1636 | } | |
1637 | ||
1638 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
1639 | { | |
1640 | int rc = 0; | |
1641 | ||
7a42fdc2 | 1642 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 1643 | rc = -EBUSY; |
d7b0b5eb CO |
1644 | else { |
1645 | vcpu->run->psw_mask = psw.mask; | |
1646 | vcpu->run->psw_addr = psw.addr; | |
1647 | } | |
b0c632db HC |
1648 | return rc; |
1649 | } | |
1650 | ||
1651 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
1652 | struct kvm_translation *tr) | |
1653 | { | |
1654 | return -EINVAL; /* not implemented yet */ | |
1655 | } | |
1656 | ||
27291e21 DH |
1657 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
1658 | KVM_GUESTDBG_USE_HW_BP | \ | |
1659 | KVM_GUESTDBG_ENABLE) | |
1660 | ||
d0bfb940 JK |
1661 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
1662 | struct kvm_guest_debug *dbg) | |
b0c632db | 1663 | { |
27291e21 DH |
1664 | int rc = 0; |
1665 | ||
1666 | vcpu->guest_debug = 0; | |
1667 | kvm_s390_clear_bp_data(vcpu); | |
1668 | ||
2de3bfc2 | 1669 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
1670 | return -EINVAL; |
1671 | ||
1672 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
1673 | vcpu->guest_debug = dbg->control; | |
1674 | /* enforce guest PER */ | |
1675 | atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1676 | ||
1677 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
1678 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
1679 | } else { | |
1680 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1681 | vcpu->arch.guestdbg.last_bp = 0; | |
1682 | } | |
1683 | ||
1684 | if (rc) { | |
1685 | vcpu->guest_debug = 0; | |
1686 | kvm_s390_clear_bp_data(vcpu); | |
1687 | atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); | |
1688 | } | |
1689 | ||
1690 | return rc; | |
b0c632db HC |
1691 | } |
1692 | ||
62d9f0db MT |
1693 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
1694 | struct kvm_mp_state *mp_state) | |
1695 | { | |
6352e4d2 DH |
1696 | /* CHECK_STOP and LOAD are not supported yet */ |
1697 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
1698 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
1699 | } |
1700 | ||
1701 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
1702 | struct kvm_mp_state *mp_state) | |
1703 | { | |
6352e4d2 DH |
1704 | int rc = 0; |
1705 | ||
1706 | /* user space knows about this interface - let it control the state */ | |
1707 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
1708 | ||
1709 | switch (mp_state->mp_state) { | |
1710 | case KVM_MP_STATE_STOPPED: | |
1711 | kvm_s390_vcpu_stop(vcpu); | |
1712 | break; | |
1713 | case KVM_MP_STATE_OPERATING: | |
1714 | kvm_s390_vcpu_start(vcpu); | |
1715 | break; | |
1716 | case KVM_MP_STATE_LOAD: | |
1717 | case KVM_MP_STATE_CHECK_STOP: | |
1718 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
1719 | default: | |
1720 | rc = -ENXIO; | |
1721 | } | |
1722 | ||
1723 | return rc; | |
62d9f0db MT |
1724 | } |
1725 | ||
b31605c1 DD |
1726 | bool kvm_s390_cmma_enabled(struct kvm *kvm) |
1727 | { | |
1728 | if (!MACHINE_IS_LPAR) | |
1729 | return false; | |
1730 | /* only enable for z10 and later */ | |
1731 | if (!MACHINE_HAS_EDAT1) | |
1732 | return false; | |
1733 | if (!kvm->arch.use_cmma) | |
1734 | return false; | |
1735 | return true; | |
1736 | } | |
1737 | ||
8ad35755 DH |
1738 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
1739 | { | |
1740 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
1741 | } | |
1742 | ||
2c70fe44 CB |
1743 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
1744 | { | |
785dbef4 CB |
1745 | if (!vcpu->requests) |
1746 | return 0; | |
8ad35755 | 1747 | retry: |
8e236546 | 1748 | kvm_s390_vcpu_request_handled(vcpu); |
2c70fe44 CB |
1749 | /* |
1750 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
1751 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
1752 | * This ensures that the ipte instruction for this request has | |
1753 | * already finished. We might race against a second unmapper that | |
1754 | * wants to set the blocking bit. Lets just retry the request loop. | |
1755 | */ | |
8ad35755 | 1756 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
1757 | int rc; |
1758 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 1759 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
1760 | PAGE_SIZE * 2); |
1761 | if (rc) | |
1762 | return rc; | |
8ad35755 | 1763 | goto retry; |
2c70fe44 | 1764 | } |
8ad35755 | 1765 | |
d3d692c8 DH |
1766 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
1767 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
1768 | goto retry; | |
1769 | } | |
1770 | ||
8ad35755 DH |
1771 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
1772 | if (!ibs_enabled(vcpu)) { | |
1773 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
1774 | atomic_set_mask(CPUSTAT_IBS, | |
1775 | &vcpu->arch.sie_block->cpuflags); | |
1776 | } | |
1777 | goto retry; | |
2c70fe44 | 1778 | } |
8ad35755 DH |
1779 | |
1780 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
1781 | if (ibs_enabled(vcpu)) { | |
1782 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
1783 | atomic_clear_mask(CPUSTAT_IBS, | |
1784 | &vcpu->arch.sie_block->cpuflags); | |
1785 | } | |
1786 | goto retry; | |
1787 | } | |
1788 | ||
0759d068 DH |
1789 | /* nothing to do, just clear the request */ |
1790 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
1791 | ||
2c70fe44 CB |
1792 | return 0; |
1793 | } | |
1794 | ||
fa576c58 TH |
1795 | /** |
1796 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
1797 | * @vcpu: The corresponding virtual cpu | |
1798 | * @gpa: Guest physical address | |
1799 | * @writable: Whether the page should be writable or not | |
1800 | * | |
1801 | * Make sure that a guest page has been faulted-in on the host. | |
1802 | * | |
1803 | * Return: Zero on success, negative error code otherwise. | |
1804 | */ | |
1805 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 1806 | { |
527e30b4 MS |
1807 | return gmap_fault(vcpu->arch.gmap, gpa, |
1808 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
1809 | } |
1810 | ||
3c038e6b DD |
1811 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
1812 | unsigned long token) | |
1813 | { | |
1814 | struct kvm_s390_interrupt inti; | |
383d0b05 | 1815 | struct kvm_s390_irq irq; |
3c038e6b DD |
1816 | |
1817 | if (start_token) { | |
383d0b05 JF |
1818 | irq.u.ext.ext_params2 = token; |
1819 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
1820 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
1821 | } else { |
1822 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 1823 | inti.parm64 = token; |
3c038e6b DD |
1824 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
1825 | } | |
1826 | } | |
1827 | ||
1828 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
1829 | struct kvm_async_pf *work) | |
1830 | { | |
1831 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
1832 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
1833 | } | |
1834 | ||
1835 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
1836 | struct kvm_async_pf *work) | |
1837 | { | |
1838 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
1839 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
1840 | } | |
1841 | ||
1842 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
1843 | struct kvm_async_pf *work) | |
1844 | { | |
1845 | /* s390 will always inject the page directly */ | |
1846 | } | |
1847 | ||
1848 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
1849 | { | |
1850 | /* | |
1851 | * s390 will always inject the page directly, | |
1852 | * but we still want check_async_completion to cleanup | |
1853 | */ | |
1854 | return true; | |
1855 | } | |
1856 | ||
1857 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
1858 | { | |
1859 | hva_t hva; | |
1860 | struct kvm_arch_async_pf arch; | |
1861 | int rc; | |
1862 | ||
1863 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
1864 | return 0; | |
1865 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
1866 | vcpu->arch.pfault_compare) | |
1867 | return 0; | |
1868 | if (psw_extint_disabled(vcpu)) | |
1869 | return 0; | |
9a022067 | 1870 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
1871 | return 0; |
1872 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
1873 | return 0; | |
1874 | if (!vcpu->arch.gmap->pfault_enabled) | |
1875 | return 0; | |
1876 | ||
81480cc1 HC |
1877 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
1878 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
1879 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
1880 | return 0; |
1881 | ||
1882 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
1883 | return rc; | |
1884 | } | |
1885 | ||
3fb4c40f | 1886 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 1887 | { |
3fb4c40f | 1888 | int rc, cpuflags; |
e168bf8d | 1889 | |
3c038e6b DD |
1890 | /* |
1891 | * On s390 notifications for arriving pages will be delivered directly | |
1892 | * to the guest but the house keeping for completed pfaults is | |
1893 | * handled outside the worker. | |
1894 | */ | |
1895 | kvm_check_async_pf_completion(vcpu); | |
1896 | ||
5a32c1af | 1897 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
1898 | |
1899 | if (need_resched()) | |
1900 | schedule(); | |
1901 | ||
d3a73acb | 1902 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
1903 | s390_handle_mcck(); |
1904 | ||
79395031 JF |
1905 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
1906 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
1907 | if (rc) | |
1908 | return rc; | |
1909 | } | |
0ff31867 | 1910 | |
2c70fe44 CB |
1911 | rc = kvm_s390_handle_requests(vcpu); |
1912 | if (rc) | |
1913 | return rc; | |
1914 | ||
27291e21 DH |
1915 | if (guestdbg_enabled(vcpu)) { |
1916 | kvm_s390_backup_guest_per_regs(vcpu); | |
1917 | kvm_s390_patch_guest_per_regs(vcpu); | |
1918 | } | |
1919 | ||
b0c632db | 1920 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
1921 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
1922 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
1923 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 1924 | |
3fb4c40f TH |
1925 | return 0; |
1926 | } | |
1927 | ||
492d8642 TH |
1928 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
1929 | { | |
1930 | psw_t *psw = &vcpu->arch.sie_block->gpsw; | |
1931 | u8 opcode; | |
1932 | int rc; | |
1933 | ||
1934 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
1935 | trace_kvm_s390_sie_fault(vcpu); | |
1936 | ||
1937 | /* | |
1938 | * We want to inject an addressing exception, which is defined as a | |
1939 | * suppressing or terminating exception. However, since we came here | |
1940 | * by a DAT access exception, the PSW still points to the faulting | |
1941 | * instruction since DAT exceptions are nullifying. So we've got | |
1942 | * to look up the current opcode to get the length of the instruction | |
1943 | * to be able to forward the PSW. | |
1944 | */ | |
8ae04b8f | 1945 | rc = read_guest(vcpu, psw->addr, 0, &opcode, 1); |
492d8642 TH |
1946 | if (rc) |
1947 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
1948 | psw->addr = __rewind_psw(*psw, -insn_length(opcode)); | |
1949 | ||
1950 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
1951 | } | |
1952 | ||
3fb4c40f TH |
1953 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
1954 | { | |
24eb3a82 | 1955 | int rc = -1; |
2b29a9fd DD |
1956 | |
1957 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
1958 | vcpu->arch.sie_block->icptcode); | |
1959 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
1960 | ||
27291e21 DH |
1961 | if (guestdbg_enabled(vcpu)) |
1962 | kvm_s390_restore_guest_per_regs(vcpu); | |
1963 | ||
3fb4c40f | 1964 | if (exit_reason >= 0) { |
7c470539 | 1965 | rc = 0; |
210b1607 TH |
1966 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
1967 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
1968 | vcpu->run->s390_ucontrol.trans_exc_code = | |
1969 | current->thread.gmap_addr; | |
1970 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
1971 | rc = -EREMOTE; | |
24eb3a82 DD |
1972 | |
1973 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 1974 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 1975 | current->thread.gmap_pfault = 0; |
fa576c58 | 1976 | if (kvm_arch_setup_async_pf(vcpu)) { |
24eb3a82 | 1977 | rc = 0; |
fa576c58 TH |
1978 | } else { |
1979 | gpa_t gpa = current->thread.gmap_addr; | |
1980 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); | |
1981 | } | |
24eb3a82 DD |
1982 | } |
1983 | ||
492d8642 TH |
1984 | if (rc == -1) |
1985 | rc = vcpu_post_run_fault_in_sie(vcpu); | |
b0c632db | 1986 | |
5a32c1af | 1987 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 1988 | |
a76ccff6 TH |
1989 | if (rc == 0) { |
1990 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
1991 | /* Don't exit for host interrupts. */ |
1992 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
1993 | else |
1994 | rc = kvm_handle_sie_intercept(vcpu); | |
1995 | } | |
1996 | ||
3fb4c40f TH |
1997 | return rc; |
1998 | } | |
1999 | ||
2000 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
2001 | { | |
2002 | int rc, exit_reason; | |
2003 | ||
800c1065 TH |
2004 | /* |
2005 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
2006 | * ning the guest), so that memslots (and other stuff) are protected | |
2007 | */ | |
2008 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2009 | ||
a76ccff6 TH |
2010 | do { |
2011 | rc = vcpu_pre_run(vcpu); | |
2012 | if (rc) | |
2013 | break; | |
3fb4c40f | 2014 | |
800c1065 | 2015 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
2016 | /* |
2017 | * As PF_VCPU will be used in fault handler, between | |
2018 | * guest_enter and guest_exit should be no uaccess. | |
2019 | */ | |
0097d12e CB |
2020 | local_irq_disable(); |
2021 | __kvm_guest_enter(); | |
2022 | local_irq_enable(); | |
a76ccff6 TH |
2023 | exit_reason = sie64a(vcpu->arch.sie_block, |
2024 | vcpu->run->s.regs.gprs); | |
0097d12e CB |
2025 | local_irq_disable(); |
2026 | __kvm_guest_exit(); | |
2027 | local_irq_enable(); | |
800c1065 | 2028 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
2029 | |
2030 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 2031 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 2032 | |
800c1065 | 2033 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 2034 | return rc; |
b0c632db HC |
2035 | } |
2036 | ||
b028ee3e DH |
2037 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2038 | { | |
2039 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
2040 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
2041 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
2042 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
2043 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
2044 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
2045 | /* some control register changes require a tlb flush */ |
2046 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
2047 | } |
2048 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
2049 | vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; | |
2050 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; | |
2051 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
2052 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
2053 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
2054 | } | |
2055 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
2056 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
2057 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
2058 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
2059 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2060 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e DH |
2061 | } |
2062 | kvm_run->kvm_dirty_regs = 0; | |
2063 | } | |
2064 | ||
2065 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2066 | { | |
2067 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
2068 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
2069 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
2070 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
2071 | kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm; | |
2072 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; | |
2073 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
2074 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
2075 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
2076 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
2077 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
2078 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
2079 | } | |
2080 | ||
b0c632db HC |
2081 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2082 | { | |
8f2abe6a | 2083 | int rc; |
b0c632db HC |
2084 | sigset_t sigsaved; |
2085 | ||
27291e21 DH |
2086 | if (guestdbg_exit_pending(vcpu)) { |
2087 | kvm_s390_prepare_debug_exit(vcpu); | |
2088 | return 0; | |
2089 | } | |
2090 | ||
b0c632db HC |
2091 | if (vcpu->sigset_active) |
2092 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2093 | ||
6352e4d2 DH |
2094 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
2095 | kvm_s390_vcpu_start(vcpu); | |
2096 | } else if (is_vcpu_stopped(vcpu)) { | |
ea2cdd27 | 2097 | pr_err_ratelimited("can't run stopped vcpu %d\n", |
6352e4d2 DH |
2098 | vcpu->vcpu_id); |
2099 | return -EINVAL; | |
2100 | } | |
b0c632db | 2101 | |
b028ee3e | 2102 | sync_regs(vcpu, kvm_run); |
d7b0b5eb | 2103 | |
dab4079d | 2104 | might_fault(); |
a76ccff6 | 2105 | rc = __vcpu_run(vcpu); |
9ace903d | 2106 | |
b1d16c49 CE |
2107 | if (signal_pending(current) && !rc) { |
2108 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 2109 | rc = -EINTR; |
b1d16c49 | 2110 | } |
8f2abe6a | 2111 | |
27291e21 DH |
2112 | if (guestdbg_exit_pending(vcpu) && !rc) { |
2113 | kvm_s390_prepare_debug_exit(vcpu); | |
2114 | rc = 0; | |
2115 | } | |
2116 | ||
b8e660b8 | 2117 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
2118 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
2119 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
2120 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
2121 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
2122 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
2123 | rc = 0; | |
2124 | } | |
2125 | ||
2126 | if (rc == -EREMOTE) { | |
2127 | /* intercept was handled, but userspace support is needed | |
2128 | * kvm_run has been prepared by the handler */ | |
2129 | rc = 0; | |
2130 | } | |
b0c632db | 2131 | |
b028ee3e | 2132 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 2133 | |
b0c632db HC |
2134 | if (vcpu->sigset_active) |
2135 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2136 | ||
b0c632db | 2137 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 2138 | return rc; |
b0c632db HC |
2139 | } |
2140 | ||
b0c632db HC |
2141 | /* |
2142 | * store status at address | |
2143 | * we use have two special cases: | |
2144 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
2145 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
2146 | */ | |
d0bce605 | 2147 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 2148 | { |
092670cd | 2149 | unsigned char archmode = 1; |
fda902cb | 2150 | unsigned int px; |
178bd789 | 2151 | u64 clkcomp; |
d0bce605 | 2152 | int rc; |
b0c632db | 2153 | |
d0bce605 HC |
2154 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
2155 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 2156 | return -EFAULT; |
d0bce605 HC |
2157 | gpa = SAVE_AREA_BASE; |
2158 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { | |
2159 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 2160 | return -EFAULT; |
d0bce605 HC |
2161 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
2162 | } | |
2163 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), | |
2164 | vcpu->arch.guest_fpregs.fprs, 128); | |
2165 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), | |
2166 | vcpu->run->s.regs.gprs, 128); | |
2167 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), | |
2168 | &vcpu->arch.sie_block->gpsw, 16); | |
fda902cb | 2169 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 | 2170 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
fda902cb | 2171 | &px, 4); |
d0bce605 HC |
2172 | rc |= write_guest_abs(vcpu, |
2173 | gpa + offsetof(struct save_area, fp_ctrl_reg), | |
2174 | &vcpu->arch.guest_fpregs.fpc, 4); | |
2175 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), | |
2176 | &vcpu->arch.sie_block->todpr, 4); | |
2177 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), | |
2178 | &vcpu->arch.sie_block->cputm, 8); | |
178bd789 | 2179 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d0bce605 HC |
2180 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
2181 | &clkcomp, 8); | |
2182 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), | |
2183 | &vcpu->run->s.regs.acrs, 64); | |
2184 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), | |
2185 | &vcpu->arch.sie_block->gcr, 128); | |
2186 | return rc ? -EFAULT : 0; | |
b0c632db HC |
2187 | } |
2188 | ||
e879892c TH |
2189 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
2190 | { | |
2191 | /* | |
2192 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
2193 | * copying in vcpu load/put. Lets update our copies before we save | |
2194 | * it into the save area | |
2195 | */ | |
2196 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
2197 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
2198 | save_access_regs(vcpu->run->s.regs.acrs); | |
2199 | ||
2200 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
2201 | } | |
2202 | ||
bc17de7c EF |
2203 | /* |
2204 | * store additional status at address | |
2205 | */ | |
2206 | int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, | |
2207 | unsigned long gpa) | |
2208 | { | |
2209 | /* Only bits 0-53 are used for address formation */ | |
2210 | if (!(gpa & ~0x3ff)) | |
2211 | return 0; | |
2212 | ||
2213 | return write_guest_abs(vcpu, gpa & ~0x3ff, | |
2214 | (void *)&vcpu->run->s.regs.vrs, 512); | |
2215 | } | |
2216 | ||
2217 | int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
2218 | { | |
2219 | if (!test_kvm_facility(vcpu->kvm, 129)) | |
2220 | return 0; | |
2221 | ||
2222 | /* | |
2223 | * The guest VXRS are in the host VXRs due to the lazy | |
2224 | * copying in vcpu load/put. Let's update our copies before we save | |
2225 | * it into the save area. | |
2226 | */ | |
2227 | save_vx_regs((__vector128 *)&vcpu->run->s.regs.vrs); | |
2228 | ||
2229 | return kvm_s390_store_adtl_status_unloaded(vcpu, addr); | |
2230 | } | |
2231 | ||
8ad35755 DH |
2232 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2233 | { | |
2234 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
8e236546 | 2235 | kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
8ad35755 DH |
2236 | } |
2237 | ||
2238 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2239 | { | |
2240 | unsigned int i; | |
2241 | struct kvm_vcpu *vcpu; | |
2242 | ||
2243 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2244 | __disable_ibs_on_vcpu(vcpu); | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2249 | { | |
2250 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
8e236546 | 2251 | kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
8ad35755 DH |
2252 | } |
2253 | ||
6852d7b6 DH |
2254 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2255 | { | |
8ad35755 DH |
2256 | int i, online_vcpus, started_vcpus = 0; |
2257 | ||
2258 | if (!is_vcpu_stopped(vcpu)) | |
2259 | return; | |
2260 | ||
6852d7b6 | 2261 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2262 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2263 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2264 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2265 | ||
2266 | for (i = 0; i < online_vcpus; i++) { | |
2267 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2268 | started_vcpus++; | |
2269 | } | |
2270 | ||
2271 | if (started_vcpus == 0) { | |
2272 | /* we're the only active VCPU -> speed it up */ | |
2273 | __enable_ibs_on_vcpu(vcpu); | |
2274 | } else if (started_vcpus == 1) { | |
2275 | /* | |
2276 | * As we are starting a second VCPU, we have to disable | |
2277 | * the IBS facility on all VCPUs to remove potentially | |
2278 | * oustanding ENABLE requests. | |
2279 | */ | |
2280 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2281 | } | |
2282 | ||
6852d7b6 | 2283 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2284 | /* |
2285 | * Another VCPU might have used IBS while we were offline. | |
2286 | * Let's play safe and flush the VCPU at startup. | |
2287 | */ | |
d3d692c8 | 2288 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2289 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2290 | return; |
6852d7b6 DH |
2291 | } |
2292 | ||
2293 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2294 | { | |
8ad35755 DH |
2295 | int i, online_vcpus, started_vcpus = 0; |
2296 | struct kvm_vcpu *started_vcpu = NULL; | |
2297 | ||
2298 | if (is_vcpu_stopped(vcpu)) | |
2299 | return; | |
2300 | ||
6852d7b6 | 2301 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2302 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2303 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2304 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2305 | ||
32f5ff63 | 2306 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 2307 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 2308 | |
6cddd432 | 2309 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2310 | __disable_ibs_on_vcpu(vcpu); |
2311 | ||
2312 | for (i = 0; i < online_vcpus; i++) { | |
2313 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
2314 | started_vcpus++; | |
2315 | started_vcpu = vcpu->kvm->vcpus[i]; | |
2316 | } | |
2317 | } | |
2318 | ||
2319 | if (started_vcpus == 1) { | |
2320 | /* | |
2321 | * As we only have one VCPU left, we want to enable the | |
2322 | * IBS facility for that VCPU to speed it up. | |
2323 | */ | |
2324 | __enable_ibs_on_vcpu(started_vcpu); | |
2325 | } | |
2326 | ||
433b9ee4 | 2327 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2328 | return; |
6852d7b6 DH |
2329 | } |
2330 | ||
d6712df9 CH |
2331 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
2332 | struct kvm_enable_cap *cap) | |
2333 | { | |
2334 | int r; | |
2335 | ||
2336 | if (cap->flags) | |
2337 | return -EINVAL; | |
2338 | ||
2339 | switch (cap->cap) { | |
fa6b7fe9 CH |
2340 | case KVM_CAP_S390_CSS_SUPPORT: |
2341 | if (!vcpu->kvm->arch.css_support) { | |
2342 | vcpu->kvm->arch.css_support = 1; | |
2343 | trace_kvm_s390_enable_css(vcpu->kvm); | |
2344 | } | |
2345 | r = 0; | |
2346 | break; | |
d6712df9 CH |
2347 | default: |
2348 | r = -EINVAL; | |
2349 | break; | |
2350 | } | |
2351 | return r; | |
2352 | } | |
2353 | ||
41408c28 TH |
2354 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
2355 | struct kvm_s390_mem_op *mop) | |
2356 | { | |
2357 | void __user *uaddr = (void __user *)mop->buf; | |
2358 | void *tmpbuf = NULL; | |
2359 | int r, srcu_idx; | |
2360 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
2361 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
2362 | ||
2363 | if (mop->flags & ~supported_flags) | |
2364 | return -EINVAL; | |
2365 | ||
2366 | if (mop->size > MEM_OP_MAX_SIZE) | |
2367 | return -E2BIG; | |
2368 | ||
2369 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
2370 | tmpbuf = vmalloc(mop->size); | |
2371 | if (!tmpbuf) | |
2372 | return -ENOMEM; | |
2373 | } | |
2374 | ||
2375 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2376 | ||
2377 | switch (mop->op) { | |
2378 | case KVM_S390_MEMOP_LOGICAL_READ: | |
2379 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
2380 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, false); | |
2381 | break; | |
2382 | } | |
2383 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2384 | if (r == 0) { | |
2385 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
2386 | r = -EFAULT; | |
2387 | } | |
2388 | break; | |
2389 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
2390 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
2391 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, true); | |
2392 | break; | |
2393 | } | |
2394 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
2395 | r = -EFAULT; | |
2396 | break; | |
2397 | } | |
2398 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2399 | break; | |
2400 | default: | |
2401 | r = -EINVAL; | |
2402 | } | |
2403 | ||
2404 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
2405 | ||
2406 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
2407 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
2408 | ||
2409 | vfree(tmpbuf); | |
2410 | return r; | |
2411 | } | |
2412 | ||
b0c632db HC |
2413 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2414 | unsigned int ioctl, unsigned long arg) | |
2415 | { | |
2416 | struct kvm_vcpu *vcpu = filp->private_data; | |
2417 | void __user *argp = (void __user *)arg; | |
800c1065 | 2418 | int idx; |
bc923cc9 | 2419 | long r; |
b0c632db | 2420 | |
93736624 | 2421 | switch (ioctl) { |
47b43c52 JF |
2422 | case KVM_S390_IRQ: { |
2423 | struct kvm_s390_irq s390irq; | |
2424 | ||
2425 | r = -EFAULT; | |
2426 | if (copy_from_user(&s390irq, argp, sizeof(s390irq))) | |
2427 | break; | |
2428 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
2429 | break; | |
2430 | } | |
93736624 | 2431 | case KVM_S390_INTERRUPT: { |
ba5c1e9b | 2432 | struct kvm_s390_interrupt s390int; |
383d0b05 | 2433 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 2434 | |
93736624 | 2435 | r = -EFAULT; |
ba5c1e9b | 2436 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 2437 | break; |
383d0b05 JF |
2438 | if (s390int_to_s390irq(&s390int, &s390irq)) |
2439 | return -EINVAL; | |
2440 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 2441 | break; |
ba5c1e9b | 2442 | } |
b0c632db | 2443 | case KVM_S390_STORE_STATUS: |
800c1065 | 2444 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 2445 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 2446 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 2447 | break; |
b0c632db HC |
2448 | case KVM_S390_SET_INITIAL_PSW: { |
2449 | psw_t psw; | |
2450 | ||
bc923cc9 | 2451 | r = -EFAULT; |
b0c632db | 2452 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
2453 | break; |
2454 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
2455 | break; | |
b0c632db HC |
2456 | } |
2457 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
2458 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
2459 | break; | |
14eebd91 CO |
2460 | case KVM_SET_ONE_REG: |
2461 | case KVM_GET_ONE_REG: { | |
2462 | struct kvm_one_reg reg; | |
2463 | r = -EFAULT; | |
2464 | if (copy_from_user(®, argp, sizeof(reg))) | |
2465 | break; | |
2466 | if (ioctl == KVM_SET_ONE_REG) | |
2467 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
2468 | else | |
2469 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
2470 | break; | |
2471 | } | |
27e0393f CO |
2472 | #ifdef CONFIG_KVM_S390_UCONTROL |
2473 | case KVM_S390_UCAS_MAP: { | |
2474 | struct kvm_s390_ucas_mapping ucasmap; | |
2475 | ||
2476 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2477 | r = -EFAULT; | |
2478 | break; | |
2479 | } | |
2480 | ||
2481 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2482 | r = -EINVAL; | |
2483 | break; | |
2484 | } | |
2485 | ||
2486 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
2487 | ucasmap.vcpu_addr, ucasmap.length); | |
2488 | break; | |
2489 | } | |
2490 | case KVM_S390_UCAS_UNMAP: { | |
2491 | struct kvm_s390_ucas_mapping ucasmap; | |
2492 | ||
2493 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2494 | r = -EFAULT; | |
2495 | break; | |
2496 | } | |
2497 | ||
2498 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2499 | r = -EINVAL; | |
2500 | break; | |
2501 | } | |
2502 | ||
2503 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
2504 | ucasmap.length); | |
2505 | break; | |
2506 | } | |
2507 | #endif | |
ccc7910f | 2508 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 2509 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
2510 | break; |
2511 | } | |
d6712df9 CH |
2512 | case KVM_ENABLE_CAP: |
2513 | { | |
2514 | struct kvm_enable_cap cap; | |
2515 | r = -EFAULT; | |
2516 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
2517 | break; | |
2518 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
2519 | break; | |
2520 | } | |
41408c28 TH |
2521 | case KVM_S390_MEM_OP: { |
2522 | struct kvm_s390_mem_op mem_op; | |
2523 | ||
2524 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
2525 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
2526 | else | |
2527 | r = -EFAULT; | |
2528 | break; | |
2529 | } | |
816c7667 JF |
2530 | case KVM_S390_SET_IRQ_STATE: { |
2531 | struct kvm_s390_irq_state irq_state; | |
2532 | ||
2533 | r = -EFAULT; | |
2534 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2535 | break; | |
2536 | if (irq_state.len > VCPU_IRQS_MAX_BUF || | |
2537 | irq_state.len == 0 || | |
2538 | irq_state.len % sizeof(struct kvm_s390_irq) > 0) { | |
2539 | r = -EINVAL; | |
2540 | break; | |
2541 | } | |
2542 | r = kvm_s390_set_irq_state(vcpu, | |
2543 | (void __user *) irq_state.buf, | |
2544 | irq_state.len); | |
2545 | break; | |
2546 | } | |
2547 | case KVM_S390_GET_IRQ_STATE: { | |
2548 | struct kvm_s390_irq_state irq_state; | |
2549 | ||
2550 | r = -EFAULT; | |
2551 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2552 | break; | |
2553 | if (irq_state.len == 0) { | |
2554 | r = -EINVAL; | |
2555 | break; | |
2556 | } | |
2557 | r = kvm_s390_get_irq_state(vcpu, | |
2558 | (__u8 __user *) irq_state.buf, | |
2559 | irq_state.len); | |
2560 | break; | |
2561 | } | |
b0c632db | 2562 | default: |
3e6afcf1 | 2563 | r = -ENOTTY; |
b0c632db | 2564 | } |
bc923cc9 | 2565 | return r; |
b0c632db HC |
2566 | } |
2567 | ||
5b1c1493 CO |
2568 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
2569 | { | |
2570 | #ifdef CONFIG_KVM_S390_UCONTROL | |
2571 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
2572 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
2573 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
2574 | get_page(vmf->page); | |
2575 | return 0; | |
2576 | } | |
2577 | #endif | |
2578 | return VM_FAULT_SIGBUS; | |
2579 | } | |
2580 | ||
5587027c AK |
2581 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
2582 | unsigned long npages) | |
db3fe4eb TY |
2583 | { |
2584 | return 0; | |
2585 | } | |
2586 | ||
b0c632db | 2587 | /* Section: memory related */ |
f7784b8e MT |
2588 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
2589 | struct kvm_memory_slot *memslot, | |
09170a49 | 2590 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 2591 | enum kvm_mr_change change) |
b0c632db | 2592 | { |
dd2887e7 NW |
2593 | /* A few sanity checks. We can have memory slots which have to be |
2594 | located/ended at a segment boundary (1MB). The memory in userland is | |
2595 | ok to be fragmented into various different vmas. It is okay to mmap() | |
2596 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 2597 | |
598841ca | 2598 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
2599 | return -EINVAL; |
2600 | ||
598841ca | 2601 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
2602 | return -EINVAL; |
2603 | ||
f7784b8e MT |
2604 | return 0; |
2605 | } | |
2606 | ||
2607 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
09170a49 | 2608 | const struct kvm_userspace_memory_region *mem, |
8482644a | 2609 | const struct kvm_memory_slot *old, |
f36f3f28 | 2610 | const struct kvm_memory_slot *new, |
8482644a | 2611 | enum kvm_mr_change change) |
f7784b8e | 2612 | { |
f7850c92 | 2613 | int rc; |
f7784b8e | 2614 | |
2cef4deb CB |
2615 | /* If the basics of the memslot do not change, we do not want |
2616 | * to update the gmap. Every update causes several unnecessary | |
2617 | * segment translation exceptions. This is usually handled just | |
2618 | * fine by the normal fault handler + gmap, but it will also | |
2619 | * cause faults on the prefix page of running guest CPUs. | |
2620 | */ | |
2621 | if (old->userspace_addr == mem->userspace_addr && | |
2622 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
2623 | old->npages * PAGE_SIZE == mem->memory_size) | |
2624 | return; | |
598841ca CO |
2625 | |
2626 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
2627 | mem->guest_phys_addr, mem->memory_size); | |
2628 | if (rc) | |
ea2cdd27 | 2629 | pr_warn("failed to commit memory region\n"); |
598841ca | 2630 | return; |
b0c632db HC |
2631 | } |
2632 | ||
b0c632db HC |
2633 | static int __init kvm_s390_init(void) |
2634 | { | |
9d8d5786 | 2635 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
2636 | } |
2637 | ||
2638 | static void __exit kvm_s390_exit(void) | |
2639 | { | |
2640 | kvm_exit(); | |
2641 | } | |
2642 | ||
2643 | module_init(kvm_s390_init); | |
2644 | module_exit(kvm_s390_exit); | |
566af940 CH |
2645 | |
2646 | /* | |
2647 | * Enable autoloading of the kvm module. | |
2648 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
2649 | * since x86 takes a different approach. | |
2650 | */ | |
2651 | #include <linux/miscdevice.h> | |
2652 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
2653 | MODULE_ALIAS("devname:kvm"); |