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 | 30 | #include <asm/lowcore.h> |
fdf03650 | 31 | #include <asm/etr.h> |
b0c632db | 32 | #include <asm/pgtable.h> |
f5daba1d | 33 | #include <asm/nmi.h> |
a0616cde | 34 | #include <asm/switch_to.h> |
6d3da241 | 35 | #include <asm/isc.h> |
1526bf9c | 36 | #include <asm/sclp.h> |
8f2abe6a | 37 | #include "kvm-s390.h" |
b0c632db HC |
38 | #include "gaccess.h" |
39 | ||
ea2cdd27 DH |
40 | #define KMSG_COMPONENT "kvm-s390" |
41 | #undef pr_fmt | |
42 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
43 | ||
5786fffa CH |
44 | #define CREATE_TRACE_POINTS |
45 | #include "trace.h" | |
ade38c31 | 46 | #include "trace-s390.h" |
5786fffa | 47 | |
41408c28 | 48 | #define MEM_OP_MAX_SIZE 65536 /* Maximum transfer size for KVM_S390_MEM_OP */ |
816c7667 JF |
49 | #define LOCAL_IRQS 32 |
50 | #define VCPU_IRQS_MAX_BUF (sizeof(struct kvm_s390_irq) * \ | |
51 | (KVM_MAX_VCPUS + LOCAL_IRQS)) | |
41408c28 | 52 | |
b0c632db HC |
53 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
54 | ||
55 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
56 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 57 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
58 | { "exit_validity", VCPU_STAT(exit_validity) }, |
59 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
60 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
61 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
62 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
63 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
64 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f7819512 | 65 | { "halt_successful_poll", VCPU_STAT(halt_successful_poll) }, |
62bea5bf | 66 | { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll) }, |
ce2e4f0b | 67 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, |
f5e10b09 | 68 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b | 69 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
aba07508 DH |
70 | { "instruction_stctl", VCPU_STAT(instruction_stctl) }, |
71 | { "instruction_stctg", VCPU_STAT(instruction_stctg) }, | |
ba5c1e9b | 72 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
7697e71f | 73 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
74 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
75 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
76 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
77 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
78 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
79 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
80 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 81 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
82 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
83 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
84 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
85 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
86 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
8a242234 | 87 | { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) }, |
453423dc CB |
88 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
89 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
b31288fa | 90 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
91 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
92 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 93 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 94 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 95 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 96 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 | 97 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
42cb0c9f DH |
98 | { "instruction_sigp_cond_emergency", VCPU_STAT(instruction_sigp_cond_emergency) }, |
99 | { "instruction_sigp_start", VCPU_STAT(instruction_sigp_start) }, | |
5288fbf0 | 100 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
42cb0c9f DH |
101 | { "instruction_sigp_stop_store_status", VCPU_STAT(instruction_sigp_stop_store_status) }, |
102 | { "instruction_sigp_store_status", VCPU_STAT(instruction_sigp_store_status) }, | |
cd7b4b61 | 103 | { "instruction_sigp_store_adtl_status", VCPU_STAT(instruction_sigp_store_adtl_status) }, |
5288fbf0 CB |
104 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
105 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
106 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
42cb0c9f DH |
107 | { "instruction_sigp_cpu_reset", VCPU_STAT(instruction_sigp_cpu_reset) }, |
108 | { "instruction_sigp_init_cpu_reset", VCPU_STAT(instruction_sigp_init_cpu_reset) }, | |
109 | { "instruction_sigp_unknown", VCPU_STAT(instruction_sigp_unknown) }, | |
388186bc | 110 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 111 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 112 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
175a5c9e CB |
113 | { "diagnose_258", VCPU_STAT(diagnose_258) }, |
114 | { "diagnose_308", VCPU_STAT(diagnose_308) }, | |
115 | { "diagnose_500", VCPU_STAT(diagnose_500) }, | |
b0c632db HC |
116 | { NULL } |
117 | }; | |
118 | ||
9d8d5786 MM |
119 | /* upper facilities limit for kvm */ |
120 | unsigned long kvm_s390_fac_list_mask[] = { | |
a3ed8dae | 121 | 0xffe6fffbfcfdfc40UL, |
53df84f8 | 122 | 0x005e800000000000UL, |
9d8d5786 | 123 | }; |
b0c632db | 124 | |
9d8d5786 | 125 | unsigned long kvm_s390_fac_list_mask_size(void) |
78c4b59f | 126 | { |
9d8d5786 MM |
127 | BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64); |
128 | return ARRAY_SIZE(kvm_s390_fac_list_mask); | |
78c4b59f MM |
129 | } |
130 | ||
9d8d5786 | 131 | static struct gmap_notifier gmap_notifier; |
78f26131 | 132 | debug_info_t *kvm_s390_dbf; |
9d8d5786 | 133 | |
b0c632db | 134 | /* Section: not file related */ |
13a34e06 | 135 | int kvm_arch_hardware_enable(void) |
b0c632db HC |
136 | { |
137 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 138 | return 0; |
b0c632db HC |
139 | } |
140 | ||
2c70fe44 CB |
141 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
142 | ||
fdf03650 FZ |
143 | /* |
144 | * This callback is executed during stop_machine(). All CPUs are therefore | |
145 | * temporarily stopped. In order not to change guest behavior, we have to | |
146 | * disable preemption whenever we touch the epoch of kvm and the VCPUs, | |
147 | * so a CPU won't be stopped while calculating with the epoch. | |
148 | */ | |
149 | static int kvm_clock_sync(struct notifier_block *notifier, unsigned long val, | |
150 | void *v) | |
151 | { | |
152 | struct kvm *kvm; | |
153 | struct kvm_vcpu *vcpu; | |
154 | int i; | |
155 | unsigned long long *delta = v; | |
156 | ||
157 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
158 | kvm->arch.epoch -= *delta; | |
159 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
160 | vcpu->arch.sie_block->epoch -= *delta; | |
161 | } | |
162 | } | |
163 | return NOTIFY_OK; | |
164 | } | |
165 | ||
166 | static struct notifier_block kvm_clock_notifier = { | |
167 | .notifier_call = kvm_clock_sync, | |
168 | }; | |
169 | ||
b0c632db HC |
170 | int kvm_arch_hardware_setup(void) |
171 | { | |
2c70fe44 CB |
172 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
173 | gmap_register_ipte_notifier(&gmap_notifier); | |
fdf03650 FZ |
174 | atomic_notifier_chain_register(&s390_epoch_delta_notifier, |
175 | &kvm_clock_notifier); | |
b0c632db HC |
176 | return 0; |
177 | } | |
178 | ||
179 | void kvm_arch_hardware_unsetup(void) | |
180 | { | |
2c70fe44 | 181 | gmap_unregister_ipte_notifier(&gmap_notifier); |
fdf03650 FZ |
182 | atomic_notifier_chain_unregister(&s390_epoch_delta_notifier, |
183 | &kvm_clock_notifier); | |
b0c632db HC |
184 | } |
185 | ||
b0c632db HC |
186 | int kvm_arch_init(void *opaque) |
187 | { | |
78f26131 CB |
188 | kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long)); |
189 | if (!kvm_s390_dbf) | |
190 | return -ENOMEM; | |
191 | ||
192 | if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) { | |
193 | debug_unregister(kvm_s390_dbf); | |
194 | return -ENOMEM; | |
195 | } | |
196 | ||
84877d93 CH |
197 | /* Register floating interrupt controller interface. */ |
198 | return kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC); | |
b0c632db HC |
199 | } |
200 | ||
78f26131 CB |
201 | void kvm_arch_exit(void) |
202 | { | |
203 | debug_unregister(kvm_s390_dbf); | |
204 | } | |
205 | ||
b0c632db HC |
206 | /* Section: device related */ |
207 | long kvm_arch_dev_ioctl(struct file *filp, | |
208 | unsigned int ioctl, unsigned long arg) | |
209 | { | |
210 | if (ioctl == KVM_S390_ENABLE_SIE) | |
211 | return s390_enable_sie(); | |
212 | return -EINVAL; | |
213 | } | |
214 | ||
784aa3d7 | 215 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
b0c632db | 216 | { |
d7b0b5eb CO |
217 | int r; |
218 | ||
2bd0ac4e | 219 | switch (ext) { |
d7b0b5eb | 220 | case KVM_CAP_S390_PSW: |
b6cf8788 | 221 | case KVM_CAP_S390_GMAP: |
52e16b18 | 222 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
223 | #ifdef CONFIG_KVM_S390_UCONTROL |
224 | case KVM_CAP_S390_UCONTROL: | |
225 | #endif | |
3c038e6b | 226 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 227 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 228 | case KVM_CAP_ONE_REG: |
d6712df9 | 229 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 230 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 231 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 232 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 233 | case KVM_CAP_ENABLE_CAP_VM: |
78599d90 | 234 | case KVM_CAP_S390_IRQCHIP: |
f2061656 | 235 | case KVM_CAP_VM_ATTRIBUTES: |
6352e4d2 | 236 | case KVM_CAP_MP_STATE: |
47b43c52 | 237 | case KVM_CAP_S390_INJECT_IRQ: |
2444b352 | 238 | case KVM_CAP_S390_USER_SIGP: |
e44fc8c9 | 239 | case KVM_CAP_S390_USER_STSI: |
30ee2a98 | 240 | case KVM_CAP_S390_SKEYS: |
816c7667 | 241 | case KVM_CAP_S390_IRQ_STATE: |
d7b0b5eb CO |
242 | r = 1; |
243 | break; | |
41408c28 TH |
244 | case KVM_CAP_S390_MEM_OP: |
245 | r = MEM_OP_MAX_SIZE; | |
246 | break; | |
e726b1bd CB |
247 | case KVM_CAP_NR_VCPUS: |
248 | case KVM_CAP_MAX_VCPUS: | |
249 | r = KVM_MAX_VCPUS; | |
250 | break; | |
e1e2e605 NW |
251 | case KVM_CAP_NR_MEMSLOTS: |
252 | r = KVM_USER_MEM_SLOTS; | |
253 | break; | |
1526bf9c | 254 | case KVM_CAP_S390_COW: |
abf09bed | 255 | r = MACHINE_HAS_ESOP; |
1526bf9c | 256 | break; |
68c55750 EF |
257 | case KVM_CAP_S390_VECTOR_REGISTERS: |
258 | r = MACHINE_HAS_VX; | |
259 | break; | |
2bd0ac4e | 260 | default: |
d7b0b5eb | 261 | r = 0; |
2bd0ac4e | 262 | } |
d7b0b5eb | 263 | return r; |
b0c632db HC |
264 | } |
265 | ||
15f36ebd JH |
266 | static void kvm_s390_sync_dirty_log(struct kvm *kvm, |
267 | struct kvm_memory_slot *memslot) | |
268 | { | |
269 | gfn_t cur_gfn, last_gfn; | |
270 | unsigned long address; | |
271 | struct gmap *gmap = kvm->arch.gmap; | |
272 | ||
273 | down_read(&gmap->mm->mmap_sem); | |
274 | /* Loop over all guest pages */ | |
275 | last_gfn = memslot->base_gfn + memslot->npages; | |
276 | for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) { | |
277 | address = gfn_to_hva_memslot(memslot, cur_gfn); | |
278 | ||
279 | if (gmap_test_and_clear_dirty(address, gmap)) | |
280 | mark_page_dirty(kvm, cur_gfn); | |
281 | } | |
282 | up_read(&gmap->mm->mmap_sem); | |
283 | } | |
284 | ||
b0c632db HC |
285 | /* Section: vm related */ |
286 | /* | |
287 | * Get (and clear) the dirty memory log for a memory slot. | |
288 | */ | |
289 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
290 | struct kvm_dirty_log *log) | |
291 | { | |
15f36ebd JH |
292 | int r; |
293 | unsigned long n; | |
9f6b8029 | 294 | struct kvm_memslots *slots; |
15f36ebd JH |
295 | struct kvm_memory_slot *memslot; |
296 | int is_dirty = 0; | |
297 | ||
298 | mutex_lock(&kvm->slots_lock); | |
299 | ||
300 | r = -EINVAL; | |
301 | if (log->slot >= KVM_USER_MEM_SLOTS) | |
302 | goto out; | |
303 | ||
9f6b8029 PB |
304 | slots = kvm_memslots(kvm); |
305 | memslot = id_to_memslot(slots, log->slot); | |
15f36ebd JH |
306 | r = -ENOENT; |
307 | if (!memslot->dirty_bitmap) | |
308 | goto out; | |
309 | ||
310 | kvm_s390_sync_dirty_log(kvm, memslot); | |
311 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
312 | if (r) | |
313 | goto out; | |
314 | ||
315 | /* Clear the dirty log */ | |
316 | if (is_dirty) { | |
317 | n = kvm_dirty_bitmap_bytes(memslot); | |
318 | memset(memslot->dirty_bitmap, 0, n); | |
319 | } | |
320 | r = 0; | |
321 | out: | |
322 | mutex_unlock(&kvm->slots_lock); | |
323 | return r; | |
b0c632db HC |
324 | } |
325 | ||
d938dc55 CH |
326 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
327 | { | |
328 | int r; | |
329 | ||
330 | if (cap->flags) | |
331 | return -EINVAL; | |
332 | ||
333 | switch (cap->cap) { | |
84223598 | 334 | case KVM_CAP_S390_IRQCHIP: |
c92ea7b9 | 335 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_IRQCHIP"); |
84223598 CH |
336 | kvm->arch.use_irqchip = 1; |
337 | r = 0; | |
338 | break; | |
2444b352 | 339 | case KVM_CAP_S390_USER_SIGP: |
c92ea7b9 | 340 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_SIGP"); |
2444b352 DH |
341 | kvm->arch.user_sigp = 1; |
342 | r = 0; | |
343 | break; | |
68c55750 | 344 | case KVM_CAP_S390_VECTOR_REGISTERS: |
5967c17b DH |
345 | mutex_lock(&kvm->lock); |
346 | if (atomic_read(&kvm->online_vcpus)) { | |
347 | r = -EBUSY; | |
348 | } else if (MACHINE_HAS_VX) { | |
18280d8b MM |
349 | set_kvm_facility(kvm->arch.model.fac->mask, 129); |
350 | set_kvm_facility(kvm->arch.model.fac->list, 129); | |
351 | r = 0; | |
352 | } else | |
353 | r = -EINVAL; | |
5967c17b | 354 | mutex_unlock(&kvm->lock); |
c92ea7b9 CB |
355 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
356 | r ? "(not available)" : "(success)"); | |
68c55750 | 357 | break; |
e44fc8c9 | 358 | case KVM_CAP_S390_USER_STSI: |
c92ea7b9 | 359 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI"); |
e44fc8c9 ET |
360 | kvm->arch.user_stsi = 1; |
361 | r = 0; | |
362 | break; | |
d938dc55 CH |
363 | default: |
364 | r = -EINVAL; | |
365 | break; | |
366 | } | |
367 | return r; | |
368 | } | |
369 | ||
8c0a7ce6 DD |
370 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
371 | { | |
372 | int ret; | |
373 | ||
374 | switch (attr->attr) { | |
375 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
376 | ret = 0; | |
c92ea7b9 CB |
377 | VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
378 | kvm->arch.gmap->asce_end); | |
8c0a7ce6 DD |
379 | if (put_user(kvm->arch.gmap->asce_end, (u64 __user *)attr->addr)) |
380 | ret = -EFAULT; | |
381 | break; | |
382 | default: | |
383 | ret = -ENXIO; | |
384 | break; | |
385 | } | |
386 | return ret; | |
387 | } | |
388 | ||
389 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
390 | { |
391 | int ret; | |
392 | unsigned int idx; | |
393 | switch (attr->attr) { | |
394 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
e6db1d61 DD |
395 | /* enable CMMA only for z10 and later (EDAT_1) */ |
396 | ret = -EINVAL; | |
397 | if (!MACHINE_IS_LPAR || !MACHINE_HAS_EDAT1) | |
398 | break; | |
399 | ||
4f718eab | 400 | ret = -EBUSY; |
c92ea7b9 | 401 | VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
4f718eab DD |
402 | mutex_lock(&kvm->lock); |
403 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
404 | kvm->arch.use_cmma = 1; | |
405 | ret = 0; | |
406 | } | |
407 | mutex_unlock(&kvm->lock); | |
408 | break; | |
409 | case KVM_S390_VM_MEM_CLR_CMMA: | |
c3489155 DD |
410 | ret = -EINVAL; |
411 | if (!kvm->arch.use_cmma) | |
412 | break; | |
413 | ||
c92ea7b9 | 414 | VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
4f718eab DD |
415 | mutex_lock(&kvm->lock); |
416 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 417 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
418 | srcu_read_unlock(&kvm->srcu, idx); |
419 | mutex_unlock(&kvm->lock); | |
420 | ret = 0; | |
421 | break; | |
8c0a7ce6 DD |
422 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
423 | unsigned long new_limit; | |
424 | ||
425 | if (kvm_is_ucontrol(kvm)) | |
426 | return -EINVAL; | |
427 | ||
428 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
429 | return -EFAULT; | |
430 | ||
431 | if (new_limit > kvm->arch.gmap->asce_end) | |
432 | return -E2BIG; | |
433 | ||
434 | ret = -EBUSY; | |
435 | mutex_lock(&kvm->lock); | |
436 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
437 | /* gmap_alloc will round the limit up */ | |
438 | struct gmap *new = gmap_alloc(current->mm, new_limit); | |
439 | ||
440 | if (!new) { | |
441 | ret = -ENOMEM; | |
442 | } else { | |
443 | gmap_free(kvm->arch.gmap); | |
444 | new->private = kvm; | |
445 | kvm->arch.gmap = new; | |
446 | ret = 0; | |
447 | } | |
448 | } | |
449 | mutex_unlock(&kvm->lock); | |
c92ea7b9 | 450 | VM_EVENT(kvm, 3, "SET: max guest memory: %lu bytes", new_limit); |
8c0a7ce6 DD |
451 | break; |
452 | } | |
4f718eab DD |
453 | default: |
454 | ret = -ENXIO; | |
455 | break; | |
456 | } | |
457 | return ret; | |
458 | } | |
459 | ||
a374e892 TK |
460 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
461 | ||
462 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
463 | { | |
464 | struct kvm_vcpu *vcpu; | |
465 | int i; | |
466 | ||
9d8d5786 | 467 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
468 | return -EINVAL; |
469 | ||
470 | mutex_lock(&kvm->lock); | |
471 | switch (attr->attr) { | |
472 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
473 | get_random_bytes( | |
474 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
475 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
476 | kvm->arch.crypto.aes_kw = 1; | |
c92ea7b9 | 477 | VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
a374e892 TK |
478 | break; |
479 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
480 | get_random_bytes( | |
481 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
482 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
483 | kvm->arch.crypto.dea_kw = 1; | |
c92ea7b9 | 484 | VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
a374e892 TK |
485 | break; |
486 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
487 | kvm->arch.crypto.aes_kw = 0; | |
488 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
489 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
c92ea7b9 | 490 | VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
a374e892 TK |
491 | break; |
492 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
493 | kvm->arch.crypto.dea_kw = 0; | |
494 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
495 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
c92ea7b9 | 496 | VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
a374e892 TK |
497 | break; |
498 | default: | |
499 | mutex_unlock(&kvm->lock); | |
500 | return -ENXIO; | |
501 | } | |
502 | ||
503 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
504 | kvm_s390_vcpu_crypto_setup(vcpu); | |
505 | exit_sie(vcpu); | |
506 | } | |
507 | mutex_unlock(&kvm->lock); | |
508 | return 0; | |
509 | } | |
510 | ||
72f25020 JH |
511 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
512 | { | |
513 | u8 gtod_high; | |
514 | ||
515 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
516 | sizeof(gtod_high))) | |
517 | return -EFAULT; | |
518 | ||
519 | if (gtod_high != 0) | |
520 | return -EINVAL; | |
58c383c6 | 521 | VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
522 | |
523 | return 0; | |
524 | } | |
525 | ||
526 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
527 | { | |
5a3d883a | 528 | u64 gtod; |
72f25020 JH |
529 | |
530 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
531 | return -EFAULT; | |
532 | ||
25ed1675 | 533 | kvm_s390_set_tod_clock(kvm, gtod); |
58c383c6 | 534 | VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx", gtod); |
72f25020 JH |
535 | return 0; |
536 | } | |
537 | ||
538 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
539 | { | |
540 | int ret; | |
541 | ||
542 | if (attr->flags) | |
543 | return -EINVAL; | |
544 | ||
545 | switch (attr->attr) { | |
546 | case KVM_S390_VM_TOD_HIGH: | |
547 | ret = kvm_s390_set_tod_high(kvm, attr); | |
548 | break; | |
549 | case KVM_S390_VM_TOD_LOW: | |
550 | ret = kvm_s390_set_tod_low(kvm, attr); | |
551 | break; | |
552 | default: | |
553 | ret = -ENXIO; | |
554 | break; | |
555 | } | |
556 | return ret; | |
557 | } | |
558 | ||
559 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
560 | { | |
561 | u8 gtod_high = 0; | |
562 | ||
563 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
564 | sizeof(gtod_high))) | |
565 | return -EFAULT; | |
58c383c6 | 566 | VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x", gtod_high); |
72f25020 JH |
567 | |
568 | return 0; | |
569 | } | |
570 | ||
571 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
572 | { | |
5a3d883a | 573 | u64 gtod; |
72f25020 | 574 | |
60417fcc | 575 | gtod = kvm_s390_get_tod_clock_fast(kvm); |
72f25020 JH |
576 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
577 | return -EFAULT; | |
58c383c6 | 578 | VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx", gtod); |
72f25020 JH |
579 | |
580 | return 0; | |
581 | } | |
582 | ||
583 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
584 | { | |
585 | int ret; | |
586 | ||
587 | if (attr->flags) | |
588 | return -EINVAL; | |
589 | ||
590 | switch (attr->attr) { | |
591 | case KVM_S390_VM_TOD_HIGH: | |
592 | ret = kvm_s390_get_tod_high(kvm, attr); | |
593 | break; | |
594 | case KVM_S390_VM_TOD_LOW: | |
595 | ret = kvm_s390_get_tod_low(kvm, attr); | |
596 | break; | |
597 | default: | |
598 | ret = -ENXIO; | |
599 | break; | |
600 | } | |
601 | return ret; | |
602 | } | |
603 | ||
658b6eda MM |
604 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
605 | { | |
606 | struct kvm_s390_vm_cpu_processor *proc; | |
607 | int ret = 0; | |
608 | ||
609 | mutex_lock(&kvm->lock); | |
610 | if (atomic_read(&kvm->online_vcpus)) { | |
611 | ret = -EBUSY; | |
612 | goto out; | |
613 | } | |
614 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
615 | if (!proc) { | |
616 | ret = -ENOMEM; | |
617 | goto out; | |
618 | } | |
619 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
620 | sizeof(*proc))) { | |
621 | memcpy(&kvm->arch.model.cpu_id, &proc->cpuid, | |
622 | sizeof(struct cpuid)); | |
623 | kvm->arch.model.ibc = proc->ibc; | |
981467c9 | 624 | memcpy(kvm->arch.model.fac->list, proc->fac_list, |
658b6eda MM |
625 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
626 | } else | |
627 | ret = -EFAULT; | |
628 | kfree(proc); | |
629 | out: | |
630 | mutex_unlock(&kvm->lock); | |
631 | return ret; | |
632 | } | |
633 | ||
634 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
635 | { | |
636 | int ret = -ENXIO; | |
637 | ||
638 | switch (attr->attr) { | |
639 | case KVM_S390_VM_CPU_PROCESSOR: | |
640 | ret = kvm_s390_set_processor(kvm, attr); | |
641 | break; | |
642 | } | |
643 | return ret; | |
644 | } | |
645 | ||
646 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
647 | { | |
648 | struct kvm_s390_vm_cpu_processor *proc; | |
649 | int ret = 0; | |
650 | ||
651 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
652 | if (!proc) { | |
653 | ret = -ENOMEM; | |
654 | goto out; | |
655 | } | |
656 | memcpy(&proc->cpuid, &kvm->arch.model.cpu_id, sizeof(struct cpuid)); | |
657 | proc->ibc = kvm->arch.model.ibc; | |
981467c9 | 658 | memcpy(&proc->fac_list, kvm->arch.model.fac->list, S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
659 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
660 | ret = -EFAULT; | |
661 | kfree(proc); | |
662 | out: | |
663 | return ret; | |
664 | } | |
665 | ||
666 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
667 | { | |
668 | struct kvm_s390_vm_cpu_machine *mach; | |
669 | int ret = 0; | |
670 | ||
671 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
672 | if (!mach) { | |
673 | ret = -ENOMEM; | |
674 | goto out; | |
675 | } | |
676 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
37c5f6c8 | 677 | mach->ibc = sclp.ibc; |
981467c9 MM |
678 | memcpy(&mach->fac_mask, kvm->arch.model.fac->mask, |
679 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
658b6eda | 680 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
94422ee8 | 681 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
682 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
683 | ret = -EFAULT; | |
684 | kfree(mach); | |
685 | out: | |
686 | return ret; | |
687 | } | |
688 | ||
689 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
690 | { | |
691 | int ret = -ENXIO; | |
692 | ||
693 | switch (attr->attr) { | |
694 | case KVM_S390_VM_CPU_PROCESSOR: | |
695 | ret = kvm_s390_get_processor(kvm, attr); | |
696 | break; | |
697 | case KVM_S390_VM_CPU_MACHINE: | |
698 | ret = kvm_s390_get_machine(kvm, attr); | |
699 | break; | |
700 | } | |
701 | return ret; | |
702 | } | |
703 | ||
f2061656 DD |
704 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
705 | { | |
706 | int ret; | |
707 | ||
708 | switch (attr->group) { | |
4f718eab | 709 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 710 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 711 | break; |
72f25020 JH |
712 | case KVM_S390_VM_TOD: |
713 | ret = kvm_s390_set_tod(kvm, attr); | |
714 | break; | |
658b6eda MM |
715 | case KVM_S390_VM_CPU_MODEL: |
716 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
717 | break; | |
a374e892 TK |
718 | case KVM_S390_VM_CRYPTO: |
719 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
720 | break; | |
f2061656 DD |
721 | default: |
722 | ret = -ENXIO; | |
723 | break; | |
724 | } | |
725 | ||
726 | return ret; | |
727 | } | |
728 | ||
729 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
730 | { | |
8c0a7ce6 DD |
731 | int ret; |
732 | ||
733 | switch (attr->group) { | |
734 | case KVM_S390_VM_MEM_CTRL: | |
735 | ret = kvm_s390_get_mem_control(kvm, attr); | |
736 | break; | |
72f25020 JH |
737 | case KVM_S390_VM_TOD: |
738 | ret = kvm_s390_get_tod(kvm, attr); | |
739 | break; | |
658b6eda MM |
740 | case KVM_S390_VM_CPU_MODEL: |
741 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
742 | break; | |
8c0a7ce6 DD |
743 | default: |
744 | ret = -ENXIO; | |
745 | break; | |
746 | } | |
747 | ||
748 | return ret; | |
f2061656 DD |
749 | } |
750 | ||
751 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
752 | { | |
753 | int ret; | |
754 | ||
755 | switch (attr->group) { | |
4f718eab DD |
756 | case KVM_S390_VM_MEM_CTRL: |
757 | switch (attr->attr) { | |
758 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
759 | case KVM_S390_VM_MEM_CLR_CMMA: | |
8c0a7ce6 | 760 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
761 | ret = 0; |
762 | break; | |
763 | default: | |
764 | ret = -ENXIO; | |
765 | break; | |
766 | } | |
767 | break; | |
72f25020 JH |
768 | case KVM_S390_VM_TOD: |
769 | switch (attr->attr) { | |
770 | case KVM_S390_VM_TOD_LOW: | |
771 | case KVM_S390_VM_TOD_HIGH: | |
772 | ret = 0; | |
773 | break; | |
774 | default: | |
775 | ret = -ENXIO; | |
776 | break; | |
777 | } | |
778 | break; | |
658b6eda MM |
779 | case KVM_S390_VM_CPU_MODEL: |
780 | switch (attr->attr) { | |
781 | case KVM_S390_VM_CPU_PROCESSOR: | |
782 | case KVM_S390_VM_CPU_MACHINE: | |
783 | ret = 0; | |
784 | break; | |
785 | default: | |
786 | ret = -ENXIO; | |
787 | break; | |
788 | } | |
789 | break; | |
a374e892 TK |
790 | case KVM_S390_VM_CRYPTO: |
791 | switch (attr->attr) { | |
792 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
793 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
794 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
795 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
796 | ret = 0; | |
797 | break; | |
798 | default: | |
799 | ret = -ENXIO; | |
800 | break; | |
801 | } | |
802 | break; | |
f2061656 DD |
803 | default: |
804 | ret = -ENXIO; | |
805 | break; | |
806 | } | |
807 | ||
808 | return ret; | |
809 | } | |
810 | ||
30ee2a98 JH |
811 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
812 | { | |
813 | uint8_t *keys; | |
814 | uint64_t hva; | |
815 | unsigned long curkey; | |
816 | int i, r = 0; | |
817 | ||
818 | if (args->flags != 0) | |
819 | return -EINVAL; | |
820 | ||
821 | /* Is this guest using storage keys? */ | |
822 | if (!mm_use_skey(current->mm)) | |
823 | return KVM_S390_GET_SKEYS_NONE; | |
824 | ||
825 | /* Enforce sane limit on memory allocation */ | |
826 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
827 | return -EINVAL; | |
828 | ||
829 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
830 | GFP_KERNEL | __GFP_NOWARN); | |
831 | if (!keys) | |
832 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
833 | if (!keys) | |
834 | return -ENOMEM; | |
835 | ||
836 | for (i = 0; i < args->count; i++) { | |
837 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
838 | if (kvm_is_error_hva(hva)) { | |
839 | r = -EFAULT; | |
840 | goto out; | |
841 | } | |
842 | ||
843 | curkey = get_guest_storage_key(current->mm, hva); | |
844 | if (IS_ERR_VALUE(curkey)) { | |
845 | r = curkey; | |
846 | goto out; | |
847 | } | |
848 | keys[i] = curkey; | |
849 | } | |
850 | ||
851 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
852 | sizeof(uint8_t) * args->count); | |
853 | if (r) | |
854 | r = -EFAULT; | |
855 | out: | |
856 | kvfree(keys); | |
857 | return r; | |
858 | } | |
859 | ||
860 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
861 | { | |
862 | uint8_t *keys; | |
863 | uint64_t hva; | |
864 | int i, r = 0; | |
865 | ||
866 | if (args->flags != 0) | |
867 | return -EINVAL; | |
868 | ||
869 | /* Enforce sane limit on memory allocation */ | |
870 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
871 | return -EINVAL; | |
872 | ||
873 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
874 | GFP_KERNEL | __GFP_NOWARN); | |
875 | if (!keys) | |
876 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
877 | if (!keys) | |
878 | return -ENOMEM; | |
879 | ||
880 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
881 | sizeof(uint8_t) * args->count); | |
882 | if (r) { | |
883 | r = -EFAULT; | |
884 | goto out; | |
885 | } | |
886 | ||
887 | /* Enable storage key handling for the guest */ | |
14d4a425 DD |
888 | r = s390_enable_skey(); |
889 | if (r) | |
890 | goto out; | |
30ee2a98 JH |
891 | |
892 | for (i = 0; i < args->count; i++) { | |
893 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
894 | if (kvm_is_error_hva(hva)) { | |
895 | r = -EFAULT; | |
896 | goto out; | |
897 | } | |
898 | ||
899 | /* Lowest order bit is reserved */ | |
900 | if (keys[i] & 0x01) { | |
901 | r = -EINVAL; | |
902 | goto out; | |
903 | } | |
904 | ||
905 | r = set_guest_storage_key(current->mm, hva, | |
906 | (unsigned long)keys[i], 0); | |
907 | if (r) | |
908 | goto out; | |
909 | } | |
910 | out: | |
911 | kvfree(keys); | |
912 | return r; | |
913 | } | |
914 | ||
b0c632db HC |
915 | long kvm_arch_vm_ioctl(struct file *filp, |
916 | unsigned int ioctl, unsigned long arg) | |
917 | { | |
918 | struct kvm *kvm = filp->private_data; | |
919 | void __user *argp = (void __user *)arg; | |
f2061656 | 920 | struct kvm_device_attr attr; |
b0c632db HC |
921 | int r; |
922 | ||
923 | switch (ioctl) { | |
ba5c1e9b CO |
924 | case KVM_S390_INTERRUPT: { |
925 | struct kvm_s390_interrupt s390int; | |
926 | ||
927 | r = -EFAULT; | |
928 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
929 | break; | |
930 | r = kvm_s390_inject_vm(kvm, &s390int); | |
931 | break; | |
932 | } | |
d938dc55 CH |
933 | case KVM_ENABLE_CAP: { |
934 | struct kvm_enable_cap cap; | |
935 | r = -EFAULT; | |
936 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
937 | break; | |
938 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
939 | break; | |
940 | } | |
84223598 CH |
941 | case KVM_CREATE_IRQCHIP: { |
942 | struct kvm_irq_routing_entry routing; | |
943 | ||
944 | r = -EINVAL; | |
945 | if (kvm->arch.use_irqchip) { | |
946 | /* Set up dummy routing. */ | |
947 | memset(&routing, 0, sizeof(routing)); | |
152b2839 | 948 | r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
84223598 CH |
949 | } |
950 | break; | |
951 | } | |
f2061656 DD |
952 | case KVM_SET_DEVICE_ATTR: { |
953 | r = -EFAULT; | |
954 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
955 | break; | |
956 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
957 | break; | |
958 | } | |
959 | case KVM_GET_DEVICE_ATTR: { | |
960 | r = -EFAULT; | |
961 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
962 | break; | |
963 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
964 | break; | |
965 | } | |
966 | case KVM_HAS_DEVICE_ATTR: { | |
967 | r = -EFAULT; | |
968 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
969 | break; | |
970 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
971 | break; | |
972 | } | |
30ee2a98 JH |
973 | case KVM_S390_GET_SKEYS: { |
974 | struct kvm_s390_skeys args; | |
975 | ||
976 | r = -EFAULT; | |
977 | if (copy_from_user(&args, argp, | |
978 | sizeof(struct kvm_s390_skeys))) | |
979 | break; | |
980 | r = kvm_s390_get_skeys(kvm, &args); | |
981 | break; | |
982 | } | |
983 | case KVM_S390_SET_SKEYS: { | |
984 | struct kvm_s390_skeys args; | |
985 | ||
986 | r = -EFAULT; | |
987 | if (copy_from_user(&args, argp, | |
988 | sizeof(struct kvm_s390_skeys))) | |
989 | break; | |
990 | r = kvm_s390_set_skeys(kvm, &args); | |
991 | break; | |
992 | } | |
b0c632db | 993 | default: |
367e1319 | 994 | r = -ENOTTY; |
b0c632db HC |
995 | } |
996 | ||
997 | return r; | |
998 | } | |
999 | ||
45c9b47c TK |
1000 | static int kvm_s390_query_ap_config(u8 *config) |
1001 | { | |
1002 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 1003 | u32 cc = 0; |
45c9b47c | 1004 | |
86044c8c | 1005 | memset(config, 0, 128); |
45c9b47c TK |
1006 | asm volatile( |
1007 | "lgr 0,%1\n" | |
1008 | "lgr 2,%2\n" | |
1009 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 1010 | "0: ipm %0\n" |
45c9b47c | 1011 | "srl %0,28\n" |
86044c8c CB |
1012 | "1:\n" |
1013 | EX_TABLE(0b, 1b) | |
1014 | : "+r" (cc) | |
45c9b47c TK |
1015 | : "r" (fcn_code), "r" (config) |
1016 | : "cc", "0", "2", "memory" | |
1017 | ); | |
1018 | ||
1019 | return cc; | |
1020 | } | |
1021 | ||
1022 | static int kvm_s390_apxa_installed(void) | |
1023 | { | |
1024 | u8 config[128]; | |
1025 | int cc; | |
1026 | ||
1027 | if (test_facility(2) && test_facility(12)) { | |
1028 | cc = kvm_s390_query_ap_config(config); | |
1029 | ||
1030 | if (cc) | |
1031 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
1032 | else | |
1033 | return config[0] & 0x40; | |
1034 | } | |
1035 | ||
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
1040 | { | |
1041 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
1042 | ||
1043 | if (kvm_s390_apxa_installed()) | |
1044 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
1045 | else | |
1046 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
1047 | } | |
1048 | ||
9d8d5786 MM |
1049 | static void kvm_s390_get_cpu_id(struct cpuid *cpu_id) |
1050 | { | |
1051 | get_cpu_id(cpu_id); | |
1052 | cpu_id->version = 0xff; | |
1053 | } | |
1054 | ||
5102ee87 TK |
1055 | static int kvm_s390_crypto_init(struct kvm *kvm) |
1056 | { | |
9d8d5786 | 1057 | if (!test_kvm_facility(kvm, 76)) |
5102ee87 TK |
1058 | return 0; |
1059 | ||
1060 | kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb), | |
1061 | GFP_KERNEL | GFP_DMA); | |
1062 | if (!kvm->arch.crypto.crycb) | |
1063 | return -ENOMEM; | |
1064 | ||
45c9b47c | 1065 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 1066 | |
ed6f76b4 TK |
1067 | /* Enable AES/DEA protected key functions by default */ |
1068 | kvm->arch.crypto.aes_kw = 1; | |
1069 | kvm->arch.crypto.dea_kw = 1; | |
1070 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
1071 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
1072 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
1073 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
a374e892 | 1074 | |
5102ee87 TK |
1075 | return 0; |
1076 | } | |
1077 | ||
e08b9637 | 1078 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1079 | { |
9d8d5786 | 1080 | int i, rc; |
b0c632db | 1081 | char debug_name[16]; |
f6c137ff | 1082 | static unsigned long sca_offset; |
b0c632db | 1083 | |
e08b9637 CO |
1084 | rc = -EINVAL; |
1085 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1086 | if (type & ~KVM_VM_S390_UCONTROL) | |
1087 | goto out_err; | |
1088 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1089 | goto out_err; | |
1090 | #else | |
1091 | if (type) | |
1092 | goto out_err; | |
1093 | #endif | |
1094 | ||
b0c632db HC |
1095 | rc = s390_enable_sie(); |
1096 | if (rc) | |
d89f5eff | 1097 | goto out_err; |
b0c632db | 1098 | |
b290411a CO |
1099 | rc = -ENOMEM; |
1100 | ||
b0c632db HC |
1101 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
1102 | if (!kvm->arch.sca) | |
d89f5eff | 1103 | goto out_err; |
f6c137ff | 1104 | spin_lock(&kvm_lock); |
c5c2c393 DH |
1105 | sca_offset += 16; |
1106 | if (sca_offset + sizeof(struct sca_block) > PAGE_SIZE) | |
1107 | sca_offset = 0; | |
f6c137ff CB |
1108 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); |
1109 | spin_unlock(&kvm_lock); | |
b0c632db HC |
1110 | |
1111 | sprintf(debug_name, "kvm-%u", current->pid); | |
1112 | ||
1cb9cf72 | 1113 | kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long)); |
b0c632db | 1114 | if (!kvm->arch.dbf) |
40f5b735 | 1115 | goto out_err; |
b0c632db | 1116 | |
9d8d5786 MM |
1117 | /* |
1118 | * The architectural maximum amount of facilities is 16 kbit. To store | |
1119 | * this amount, 2 kbyte of memory is required. Thus we need a full | |
981467c9 MM |
1120 | * page to hold the guest facility list (arch.model.fac->list) and the |
1121 | * facility mask (arch.model.fac->mask). Its address size has to be | |
9d8d5786 MM |
1122 | * 31 bits and word aligned. |
1123 | */ | |
1124 | kvm->arch.model.fac = | |
981467c9 | 1125 | (struct kvm_s390_fac *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
9d8d5786 | 1126 | if (!kvm->arch.model.fac) |
40f5b735 | 1127 | goto out_err; |
9d8d5786 | 1128 | |
fb5bf93f | 1129 | /* Populate the facility mask initially. */ |
981467c9 | 1130 | memcpy(kvm->arch.model.fac->mask, S390_lowcore.stfle_fac_list, |
94422ee8 | 1131 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
9d8d5786 MM |
1132 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1133 | if (i < kvm_s390_fac_list_mask_size()) | |
981467c9 | 1134 | kvm->arch.model.fac->mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1135 | else |
981467c9 | 1136 | kvm->arch.model.fac->mask[i] = 0UL; |
9d8d5786 MM |
1137 | } |
1138 | ||
981467c9 MM |
1139 | /* Populate the facility list initially. */ |
1140 | memcpy(kvm->arch.model.fac->list, kvm->arch.model.fac->mask, | |
1141 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
1142 | ||
9d8d5786 | 1143 | kvm_s390_get_cpu_id(&kvm->arch.model.cpu_id); |
37c5f6c8 | 1144 | kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
9d8d5786 | 1145 | |
5102ee87 | 1146 | if (kvm_s390_crypto_init(kvm) < 0) |
40f5b735 | 1147 | goto out_err; |
5102ee87 | 1148 | |
ba5c1e9b | 1149 | spin_lock_init(&kvm->arch.float_int.lock); |
6d3da241 JF |
1150 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1151 | INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); | |
8a242234 | 1152 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1153 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1154 | |
b0c632db | 1155 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
78f26131 | 1156 | VM_EVENT(kvm, 3, "vm created with type %lu", type); |
b0c632db | 1157 | |
e08b9637 CO |
1158 | if (type & KVM_VM_S390_UCONTROL) { |
1159 | kvm->arch.gmap = NULL; | |
1160 | } else { | |
0349985a | 1161 | kvm->arch.gmap = gmap_alloc(current->mm, (1UL << 44) - 1); |
e08b9637 | 1162 | if (!kvm->arch.gmap) |
40f5b735 | 1163 | goto out_err; |
2c70fe44 | 1164 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1165 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1166 | } |
fa6b7fe9 CH |
1167 | |
1168 | kvm->arch.css_support = 0; | |
84223598 | 1169 | kvm->arch.use_irqchip = 0; |
72f25020 | 1170 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1171 | |
8ad35755 | 1172 | spin_lock_init(&kvm->arch.start_stop_lock); |
78f26131 | 1173 | KVM_EVENT(3, "vm 0x%p created by pid %u", kvm, current->pid); |
8ad35755 | 1174 | |
d89f5eff | 1175 | return 0; |
40f5b735 | 1176 | out_err: |
5102ee87 | 1177 | kfree(kvm->arch.crypto.crycb); |
9d8d5786 | 1178 | free_page((unsigned long)kvm->arch.model.fac); |
598841ca | 1179 | debug_unregister(kvm->arch.dbf); |
b0c632db | 1180 | free_page((unsigned long)(kvm->arch.sca)); |
78f26131 | 1181 | KVM_EVENT(3, "creation of vm failed: %d", rc); |
d89f5eff | 1182 | return rc; |
b0c632db HC |
1183 | } |
1184 | ||
d329c035 CB |
1185 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1186 | { | |
1187 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1188 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1189 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1190 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
1191 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
1192 | clear_bit(63 - vcpu->vcpu_id, | |
1193 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
1194 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
1195 | (__u64) vcpu->arch.sie_block) | |
1196 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
1197 | } | |
abf4a71e | 1198 | smp_mb(); |
27e0393f CO |
1199 | |
1200 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1201 | gmap_free(vcpu->arch.gmap); | |
1202 | ||
e6db1d61 | 1203 | if (vcpu->kvm->arch.use_cmma) |
b31605c1 | 1204 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
d329c035 | 1205 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1206 | |
6692cef3 | 1207 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1208 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1209 | } |
1210 | ||
1211 | static void kvm_free_vcpus(struct kvm *kvm) | |
1212 | { | |
1213 | unsigned int i; | |
988a2cae | 1214 | struct kvm_vcpu *vcpu; |
d329c035 | 1215 | |
988a2cae GN |
1216 | kvm_for_each_vcpu(i, vcpu, kvm) |
1217 | kvm_arch_vcpu_destroy(vcpu); | |
1218 | ||
1219 | mutex_lock(&kvm->lock); | |
1220 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1221 | kvm->vcpus[i] = NULL; | |
1222 | ||
1223 | atomic_set(&kvm->online_vcpus, 0); | |
1224 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1225 | } |
1226 | ||
b0c632db HC |
1227 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1228 | { | |
d329c035 | 1229 | kvm_free_vcpus(kvm); |
9d8d5786 | 1230 | free_page((unsigned long)kvm->arch.model.fac); |
b0c632db | 1231 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 1232 | debug_unregister(kvm->arch.dbf); |
5102ee87 | 1233 | kfree(kvm->arch.crypto.crycb); |
27e0393f CO |
1234 | if (!kvm_is_ucontrol(kvm)) |
1235 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 1236 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1237 | kvm_s390_clear_float_irqs(kvm); |
78f26131 | 1238 | KVM_EVENT(3, "vm 0x%p destroyed", kvm); |
b0c632db HC |
1239 | } |
1240 | ||
1241 | /* Section: vcpu related */ | |
dafd032a DD |
1242 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1243 | { | |
1244 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); | |
1245 | if (!vcpu->arch.gmap) | |
1246 | return -ENOMEM; | |
1247 | vcpu->arch.gmap->private = vcpu->kvm; | |
1248 | ||
1249 | return 0; | |
1250 | } | |
1251 | ||
b0c632db HC |
1252 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1253 | { | |
3c038e6b DD |
1254 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1255 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1256 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1257 | KVM_SYNC_GPRS | | |
9eed0735 | 1258 | KVM_SYNC_ACRS | |
b028ee3e DH |
1259 | KVM_SYNC_CRS | |
1260 | KVM_SYNC_ARCH0 | | |
1261 | KVM_SYNC_PFAULT; | |
68c55750 EF |
1262 | if (test_kvm_facility(vcpu->kvm, 129)) |
1263 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; | |
dafd032a DD |
1264 | |
1265 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1266 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1267 | ||
b0c632db HC |
1268 | return 0; |
1269 | } | |
1270 | ||
9977e886 HB |
1271 | /* |
1272 | * Backs up the current FP/VX register save area on a particular | |
1273 | * destination. Used to switch between different register save | |
1274 | * areas. | |
1275 | */ | |
1276 | static inline void save_fpu_to(struct fpu *dst) | |
1277 | { | |
1278 | dst->fpc = current->thread.fpu.fpc; | |
9977e886 HB |
1279 | dst->regs = current->thread.fpu.regs; |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * Switches the FP/VX register save area from which to lazy | |
1284 | * restore register contents. | |
1285 | */ | |
1286 | static inline void load_fpu_from(struct fpu *from) | |
1287 | { | |
1288 | current->thread.fpu.fpc = from->fpc; | |
9977e886 HB |
1289 | current->thread.fpu.regs = from->regs; |
1290 | } | |
1291 | ||
b0c632db HC |
1292 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1293 | { | |
9977e886 | 1294 | /* Save host register state */ |
d0164ee2 | 1295 | save_fpu_regs(); |
9977e886 | 1296 | save_fpu_to(&vcpu->arch.host_fpregs); |
96b2d7a8 | 1297 | |
18280d8b | 1298 | if (test_kvm_facility(vcpu->kvm, 129)) { |
9977e886 | 1299 | current->thread.fpu.fpc = vcpu->run->s.regs.fpc; |
9977e886 HB |
1300 | /* |
1301 | * Use the register save area in the SIE-control block | |
1302 | * for register restore and save in kvm_arch_vcpu_put() | |
1303 | */ | |
1304 | current->thread.fpu.vxrs = | |
1305 | (__vector128 *)&vcpu->run->s.regs.vrs; | |
9977e886 HB |
1306 | } else |
1307 | load_fpu_from(&vcpu->arch.guest_fpregs); | |
1308 | ||
1309 | if (test_fp_ctl(current->thread.fpu.fpc)) | |
96b2d7a8 | 1310 | /* User space provided an invalid FPC, let's clear it */ |
9977e886 HB |
1311 | current->thread.fpu.fpc = 0; |
1312 | ||
1313 | save_access_regs(vcpu->arch.host_acrs); | |
59674c1a | 1314 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 1315 | gmap_enable(vcpu->arch.gmap); |
805de8f4 | 1316 | atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
1317 | } |
1318 | ||
1319 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1320 | { | |
805de8f4 | 1321 | atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 1322 | gmap_disable(vcpu->arch.gmap); |
9977e886 | 1323 | |
d0164ee2 | 1324 | save_fpu_regs(); |
9977e886 | 1325 | |
18280d8b | 1326 | if (test_kvm_facility(vcpu->kvm, 129)) |
9977e886 HB |
1327 | /* |
1328 | * kvm_arch_vcpu_load() set up the register save area to | |
1329 | * the &vcpu->run->s.regs.vrs and, thus, the vector registers | |
1330 | * are already saved. Only the floating-point control must be | |
1331 | * copied. | |
1332 | */ | |
1333 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; | |
68c55750 | 1334 | else |
9977e886 HB |
1335 | save_fpu_to(&vcpu->arch.guest_fpregs); |
1336 | load_fpu_from(&vcpu->arch.host_fpregs); | |
1337 | ||
1338 | save_access_regs(vcpu->run->s.regs.acrs); | |
b0c632db HC |
1339 | restore_access_regs(vcpu->arch.host_acrs); |
1340 | } | |
1341 | ||
1342 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1343 | { | |
1344 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1345 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1346 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1347 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
1348 | vcpu->arch.sie_block->cputm = 0UL; |
1349 | vcpu->arch.sie_block->ckc = 0UL; | |
1350 | vcpu->arch.sie_block->todpr = 0; | |
1351 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1352 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1353 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
1354 | vcpu->arch.guest_fpregs.fpc = 0; | |
1355 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
1356 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 1357 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1358 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1359 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1360 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1361 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1362 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1363 | } |
1364 | ||
31928aa5 | 1365 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1366 | { |
72f25020 | 1367 | mutex_lock(&vcpu->kvm->lock); |
fdf03650 | 1368 | preempt_disable(); |
72f25020 | 1369 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; |
fdf03650 | 1370 | preempt_enable(); |
72f25020 | 1371 | mutex_unlock(&vcpu->kvm->lock); |
dafd032a DD |
1372 | if (!kvm_is_ucontrol(vcpu->kvm)) |
1373 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; | |
42897d86 MT |
1374 | } |
1375 | ||
5102ee87 TK |
1376 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1377 | { | |
9d8d5786 | 1378 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1379 | return; |
1380 | ||
a374e892 TK |
1381 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1382 | ||
1383 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1384 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1385 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1386 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1387 | ||
5102ee87 TK |
1388 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1389 | } | |
1390 | ||
b31605c1 DD |
1391 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1392 | { | |
1393 | free_page(vcpu->arch.sie_block->cbrlo); | |
1394 | vcpu->arch.sie_block->cbrlo = 0; | |
1395 | } | |
1396 | ||
1397 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1398 | { | |
1399 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1400 | if (!vcpu->arch.sie_block->cbrlo) | |
1401 | return -ENOMEM; | |
1402 | ||
1403 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1404 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1405 | return 0; | |
1406 | } | |
1407 | ||
91520f1a MM |
1408 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
1409 | { | |
1410 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
1411 | ||
1412 | vcpu->arch.cpu_id = model->cpu_id; | |
1413 | vcpu->arch.sie_block->ibc = model->ibc; | |
1414 | vcpu->arch.sie_block->fac = (int) (long) model->fac->list; | |
1415 | } | |
1416 | ||
b0c632db HC |
1417 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1418 | { | |
b31605c1 | 1419 | int rc = 0; |
b31288fa | 1420 | |
9e6dabef CH |
1421 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1422 | CPUSTAT_SM | | |
a4a4f191 GH |
1423 | CPUSTAT_STOPPED); |
1424 | ||
53df84f8 | 1425 | if (test_kvm_facility(vcpu->kvm, 78)) |
805de8f4 | 1426 | atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags); |
53df84f8 | 1427 | else if (test_kvm_facility(vcpu->kvm, 8)) |
805de8f4 | 1428 | atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); |
a4a4f191 | 1429 | |
91520f1a MM |
1430 | kvm_s390_vcpu_setup_model(vcpu); |
1431 | ||
fc34531d | 1432 | vcpu->arch.sie_block->ecb = 6; |
9d8d5786 | 1433 | if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1434 | vcpu->arch.sie_block->ecb |= 0x10; |
1435 | ||
69d0d3a3 | 1436 | vcpu->arch.sie_block->ecb2 = 8; |
ea5f4969 | 1437 | vcpu->arch.sie_block->eca = 0xC1002000U; |
37c5f6c8 | 1438 | if (sclp.has_siif) |
217a4406 | 1439 | vcpu->arch.sie_block->eca |= 1; |
37c5f6c8 | 1440 | if (sclp.has_sigpif) |
ea5f4969 | 1441 | vcpu->arch.sie_block->eca |= 0x10000000U; |
18280d8b | 1442 | if (test_kvm_facility(vcpu->kvm, 129)) { |
13211ea7 EF |
1443 | vcpu->arch.sie_block->eca |= 0x00020000; |
1444 | vcpu->arch.sie_block->ecd |= 0x20000000; | |
1445 | } | |
492d8642 | 1446 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
5a5e6536 | 1447 | |
e6db1d61 | 1448 | if (vcpu->kvm->arch.use_cmma) { |
b31605c1 DD |
1449 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
1450 | if (rc) | |
1451 | return rc; | |
b31288fa | 1452 | } |
0ac96caf | 1453 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 1454 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 1455 | |
5102ee87 TK |
1456 | kvm_s390_vcpu_crypto_setup(vcpu); |
1457 | ||
b31605c1 | 1458 | return rc; |
b0c632db HC |
1459 | } |
1460 | ||
1461 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1462 | unsigned int id) | |
1463 | { | |
4d47555a | 1464 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 1465 | struct sie_page *sie_page; |
4d47555a CO |
1466 | int rc = -EINVAL; |
1467 | ||
1468 | if (id >= KVM_MAX_VCPUS) | |
1469 | goto out; | |
1470 | ||
1471 | rc = -ENOMEM; | |
b0c632db | 1472 | |
b110feaf | 1473 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 1474 | if (!vcpu) |
4d47555a | 1475 | goto out; |
b0c632db | 1476 | |
7feb6bb8 MM |
1477 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
1478 | if (!sie_page) | |
b0c632db HC |
1479 | goto out_free_cpu; |
1480 | ||
7feb6bb8 MM |
1481 | vcpu->arch.sie_block = &sie_page->sie_block; |
1482 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
1483 | ||
b0c632db | 1484 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
1485 | if (!kvm_is_ucontrol(kvm)) { |
1486 | if (!kvm->arch.sca) { | |
1487 | WARN_ON_ONCE(1); | |
1488 | goto out_free_cpu; | |
1489 | } | |
1490 | if (!kvm->arch.sca->cpu[id].sda) | |
1491 | kvm->arch.sca->cpu[id].sda = | |
1492 | (__u64) vcpu->arch.sie_block; | |
1493 | vcpu->arch.sie_block->scaoh = | |
1494 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
1495 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
1496 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
1497 | } | |
b0c632db | 1498 | |
ba5c1e9b | 1499 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 1500 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 1501 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 1502 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 1503 | |
9977e886 HB |
1504 | /* |
1505 | * Allocate a save area for floating-point registers. If the vector | |
1506 | * extension is available, register contents are saved in the SIE | |
1507 | * control block. The allocated save area is still required in | |
1508 | * particular places, for example, in kvm_s390_vcpu_store_status(). | |
1509 | */ | |
1510 | vcpu->arch.guest_fpregs.fprs = kzalloc(sizeof(freg_t) * __NUM_FPRS, | |
1511 | GFP_KERNEL); | |
1512 | if (!vcpu->arch.guest_fpregs.fprs) { | |
1513 | rc = -ENOMEM; | |
1514 | goto out_free_sie_block; | |
1515 | } | |
1516 | ||
b0c632db HC |
1517 | rc = kvm_vcpu_init(vcpu, kvm, id); |
1518 | if (rc) | |
7b06bf2f | 1519 | goto out_free_sie_block; |
b0c632db HC |
1520 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
1521 | vcpu->arch.sie_block); | |
ade38c31 | 1522 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 1523 | |
b0c632db | 1524 | return vcpu; |
7b06bf2f WY |
1525 | out_free_sie_block: |
1526 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 1527 | out_free_cpu: |
b110feaf | 1528 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 1529 | out: |
b0c632db HC |
1530 | return ERR_PTR(rc); |
1531 | } | |
1532 | ||
b0c632db HC |
1533 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
1534 | { | |
9a022067 | 1535 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
1536 | } |
1537 | ||
27406cd5 | 1538 | void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
49b99e1e | 1539 | { |
805de8f4 | 1540 | atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1541 | exit_sie(vcpu); |
49b99e1e CB |
1542 | } |
1543 | ||
27406cd5 | 1544 | void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
49b99e1e | 1545 | { |
805de8f4 | 1546 | atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
49b99e1e CB |
1547 | } |
1548 | ||
8e236546 CB |
1549 | static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
1550 | { | |
805de8f4 | 1551 | atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1552 | exit_sie(vcpu); |
8e236546 CB |
1553 | } |
1554 | ||
1555 | static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) | |
1556 | { | |
9bf9fde2 | 1557 | atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
8e236546 CB |
1558 | } |
1559 | ||
49b99e1e CB |
1560 | /* |
1561 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
1562 | * If the CPU is not running (e.g. waiting as idle) the function will | |
1563 | * return immediately. */ | |
1564 | void exit_sie(struct kvm_vcpu *vcpu) | |
1565 | { | |
805de8f4 | 1566 | atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
49b99e1e CB |
1567 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
1568 | cpu_relax(); | |
1569 | } | |
1570 | ||
8e236546 CB |
1571 | /* Kick a guest cpu out of SIE to process a request synchronously */ |
1572 | void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) | |
49b99e1e | 1573 | { |
8e236546 CB |
1574 | kvm_make_request(req, vcpu); |
1575 | kvm_s390_vcpu_request(vcpu); | |
49b99e1e CB |
1576 | } |
1577 | ||
2c70fe44 CB |
1578 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
1579 | { | |
1580 | int i; | |
1581 | struct kvm *kvm = gmap->private; | |
1582 | struct kvm_vcpu *vcpu; | |
1583 | ||
1584 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1585 | /* match against both prefix pages */ | |
fda902cb | 1586 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 | 1587 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
8e236546 | 1588 | kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
2c70fe44 CB |
1589 | } |
1590 | } | |
1591 | } | |
1592 | ||
b6d33834 CD |
1593 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
1594 | { | |
1595 | /* kvm common code refers to this, but never calls it */ | |
1596 | BUG(); | |
1597 | return 0; | |
1598 | } | |
1599 | ||
14eebd91 CO |
1600 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
1601 | struct kvm_one_reg *reg) | |
1602 | { | |
1603 | int r = -EINVAL; | |
1604 | ||
1605 | switch (reg->id) { | |
29b7c71b CO |
1606 | case KVM_REG_S390_TODPR: |
1607 | r = put_user(vcpu->arch.sie_block->todpr, | |
1608 | (u32 __user *)reg->addr); | |
1609 | break; | |
1610 | case KVM_REG_S390_EPOCHDIFF: | |
1611 | r = put_user(vcpu->arch.sie_block->epoch, | |
1612 | (u64 __user *)reg->addr); | |
1613 | break; | |
46a6dd1c J |
1614 | case KVM_REG_S390_CPU_TIMER: |
1615 | r = put_user(vcpu->arch.sie_block->cputm, | |
1616 | (u64 __user *)reg->addr); | |
1617 | break; | |
1618 | case KVM_REG_S390_CLOCK_COMP: | |
1619 | r = put_user(vcpu->arch.sie_block->ckc, | |
1620 | (u64 __user *)reg->addr); | |
1621 | break; | |
536336c2 DD |
1622 | case KVM_REG_S390_PFTOKEN: |
1623 | r = put_user(vcpu->arch.pfault_token, | |
1624 | (u64 __user *)reg->addr); | |
1625 | break; | |
1626 | case KVM_REG_S390_PFCOMPARE: | |
1627 | r = put_user(vcpu->arch.pfault_compare, | |
1628 | (u64 __user *)reg->addr); | |
1629 | break; | |
1630 | case KVM_REG_S390_PFSELECT: | |
1631 | r = put_user(vcpu->arch.pfault_select, | |
1632 | (u64 __user *)reg->addr); | |
1633 | break; | |
672550fb CB |
1634 | case KVM_REG_S390_PP: |
1635 | r = put_user(vcpu->arch.sie_block->pp, | |
1636 | (u64 __user *)reg->addr); | |
1637 | break; | |
afa45ff5 CB |
1638 | case KVM_REG_S390_GBEA: |
1639 | r = put_user(vcpu->arch.sie_block->gbea, | |
1640 | (u64 __user *)reg->addr); | |
1641 | break; | |
14eebd91 CO |
1642 | default: |
1643 | break; | |
1644 | } | |
1645 | ||
1646 | return r; | |
1647 | } | |
1648 | ||
1649 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
1650 | struct kvm_one_reg *reg) | |
1651 | { | |
1652 | int r = -EINVAL; | |
1653 | ||
1654 | switch (reg->id) { | |
29b7c71b CO |
1655 | case KVM_REG_S390_TODPR: |
1656 | r = get_user(vcpu->arch.sie_block->todpr, | |
1657 | (u32 __user *)reg->addr); | |
1658 | break; | |
1659 | case KVM_REG_S390_EPOCHDIFF: | |
1660 | r = get_user(vcpu->arch.sie_block->epoch, | |
1661 | (u64 __user *)reg->addr); | |
1662 | break; | |
46a6dd1c J |
1663 | case KVM_REG_S390_CPU_TIMER: |
1664 | r = get_user(vcpu->arch.sie_block->cputm, | |
1665 | (u64 __user *)reg->addr); | |
1666 | break; | |
1667 | case KVM_REG_S390_CLOCK_COMP: | |
1668 | r = get_user(vcpu->arch.sie_block->ckc, | |
1669 | (u64 __user *)reg->addr); | |
1670 | break; | |
536336c2 DD |
1671 | case KVM_REG_S390_PFTOKEN: |
1672 | r = get_user(vcpu->arch.pfault_token, | |
1673 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
1674 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
1675 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
1676 | break; |
1677 | case KVM_REG_S390_PFCOMPARE: | |
1678 | r = get_user(vcpu->arch.pfault_compare, | |
1679 | (u64 __user *)reg->addr); | |
1680 | break; | |
1681 | case KVM_REG_S390_PFSELECT: | |
1682 | r = get_user(vcpu->arch.pfault_select, | |
1683 | (u64 __user *)reg->addr); | |
1684 | break; | |
672550fb CB |
1685 | case KVM_REG_S390_PP: |
1686 | r = get_user(vcpu->arch.sie_block->pp, | |
1687 | (u64 __user *)reg->addr); | |
1688 | break; | |
afa45ff5 CB |
1689 | case KVM_REG_S390_GBEA: |
1690 | r = get_user(vcpu->arch.sie_block->gbea, | |
1691 | (u64 __user *)reg->addr); | |
1692 | break; | |
14eebd91 CO |
1693 | default: |
1694 | break; | |
1695 | } | |
1696 | ||
1697 | return r; | |
1698 | } | |
b6d33834 | 1699 | |
b0c632db HC |
1700 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
1701 | { | |
b0c632db | 1702 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
1703 | return 0; |
1704 | } | |
1705 | ||
1706 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1707 | { | |
5a32c1af | 1708 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
1709 | return 0; |
1710 | } | |
1711 | ||
1712 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1713 | { | |
5a32c1af | 1714 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
1715 | return 0; |
1716 | } | |
1717 | ||
1718 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
1719 | struct kvm_sregs *sregs) | |
1720 | { | |
59674c1a | 1721 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 1722 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 1723 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
1724 | return 0; |
1725 | } | |
1726 | ||
1727 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
1728 | struct kvm_sregs *sregs) | |
1729 | { | |
59674c1a | 1730 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 1731 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
1732 | return 0; |
1733 | } | |
1734 | ||
1735 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1736 | { | |
4725c860 MS |
1737 | if (test_fp_ctl(fpu->fpc)) |
1738 | return -EINVAL; | |
9977e886 | 1739 | memcpy(vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 | 1740 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
d0164ee2 | 1741 | save_fpu_regs(); |
9977e886 | 1742 | load_fpu_from(&vcpu->arch.guest_fpregs); |
b0c632db HC |
1743 | return 0; |
1744 | } | |
1745 | ||
1746 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1747 | { | |
9977e886 | 1748 | memcpy(&fpu->fprs, vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
b0c632db | 1749 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; |
b0c632db HC |
1750 | return 0; |
1751 | } | |
1752 | ||
1753 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
1754 | { | |
1755 | int rc = 0; | |
1756 | ||
7a42fdc2 | 1757 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 1758 | rc = -EBUSY; |
d7b0b5eb CO |
1759 | else { |
1760 | vcpu->run->psw_mask = psw.mask; | |
1761 | vcpu->run->psw_addr = psw.addr; | |
1762 | } | |
b0c632db HC |
1763 | return rc; |
1764 | } | |
1765 | ||
1766 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
1767 | struct kvm_translation *tr) | |
1768 | { | |
1769 | return -EINVAL; /* not implemented yet */ | |
1770 | } | |
1771 | ||
27291e21 DH |
1772 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
1773 | KVM_GUESTDBG_USE_HW_BP | \ | |
1774 | KVM_GUESTDBG_ENABLE) | |
1775 | ||
d0bfb940 JK |
1776 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
1777 | struct kvm_guest_debug *dbg) | |
b0c632db | 1778 | { |
27291e21 DH |
1779 | int rc = 0; |
1780 | ||
1781 | vcpu->guest_debug = 0; | |
1782 | kvm_s390_clear_bp_data(vcpu); | |
1783 | ||
2de3bfc2 | 1784 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
1785 | return -EINVAL; |
1786 | ||
1787 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
1788 | vcpu->guest_debug = dbg->control; | |
1789 | /* enforce guest PER */ | |
805de8f4 | 1790 | atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
1791 | |
1792 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
1793 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
1794 | } else { | |
805de8f4 | 1795 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
1796 | vcpu->arch.guestdbg.last_bp = 0; |
1797 | } | |
1798 | ||
1799 | if (rc) { | |
1800 | vcpu->guest_debug = 0; | |
1801 | kvm_s390_clear_bp_data(vcpu); | |
805de8f4 | 1802 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
1803 | } |
1804 | ||
1805 | return rc; | |
b0c632db HC |
1806 | } |
1807 | ||
62d9f0db MT |
1808 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
1809 | struct kvm_mp_state *mp_state) | |
1810 | { | |
6352e4d2 DH |
1811 | /* CHECK_STOP and LOAD are not supported yet */ |
1812 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
1813 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
1814 | } |
1815 | ||
1816 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
1817 | struct kvm_mp_state *mp_state) | |
1818 | { | |
6352e4d2 DH |
1819 | int rc = 0; |
1820 | ||
1821 | /* user space knows about this interface - let it control the state */ | |
1822 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
1823 | ||
1824 | switch (mp_state->mp_state) { | |
1825 | case KVM_MP_STATE_STOPPED: | |
1826 | kvm_s390_vcpu_stop(vcpu); | |
1827 | break; | |
1828 | case KVM_MP_STATE_OPERATING: | |
1829 | kvm_s390_vcpu_start(vcpu); | |
1830 | break; | |
1831 | case KVM_MP_STATE_LOAD: | |
1832 | case KVM_MP_STATE_CHECK_STOP: | |
1833 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
1834 | default: | |
1835 | rc = -ENXIO; | |
1836 | } | |
1837 | ||
1838 | return rc; | |
62d9f0db MT |
1839 | } |
1840 | ||
8ad35755 DH |
1841 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
1842 | { | |
1843 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
1844 | } | |
1845 | ||
2c70fe44 CB |
1846 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
1847 | { | |
8ad35755 | 1848 | retry: |
8e236546 | 1849 | kvm_s390_vcpu_request_handled(vcpu); |
586b7ccd CB |
1850 | if (!vcpu->requests) |
1851 | return 0; | |
2c70fe44 CB |
1852 | /* |
1853 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
1854 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
1855 | * This ensures that the ipte instruction for this request has | |
1856 | * already finished. We might race against a second unmapper that | |
1857 | * wants to set the blocking bit. Lets just retry the request loop. | |
1858 | */ | |
8ad35755 | 1859 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
1860 | int rc; |
1861 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 1862 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
1863 | PAGE_SIZE * 2); |
1864 | if (rc) | |
1865 | return rc; | |
8ad35755 | 1866 | goto retry; |
2c70fe44 | 1867 | } |
8ad35755 | 1868 | |
d3d692c8 DH |
1869 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
1870 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
1871 | goto retry; | |
1872 | } | |
1873 | ||
8ad35755 DH |
1874 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
1875 | if (!ibs_enabled(vcpu)) { | |
1876 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
805de8f4 | 1877 | atomic_or(CPUSTAT_IBS, |
8ad35755 DH |
1878 | &vcpu->arch.sie_block->cpuflags); |
1879 | } | |
1880 | goto retry; | |
2c70fe44 | 1881 | } |
8ad35755 DH |
1882 | |
1883 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
1884 | if (ibs_enabled(vcpu)) { | |
1885 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
805de8f4 | 1886 | atomic_andnot(CPUSTAT_IBS, |
8ad35755 DH |
1887 | &vcpu->arch.sie_block->cpuflags); |
1888 | } | |
1889 | goto retry; | |
1890 | } | |
1891 | ||
0759d068 DH |
1892 | /* nothing to do, just clear the request */ |
1893 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
1894 | ||
2c70fe44 CB |
1895 | return 0; |
1896 | } | |
1897 | ||
25ed1675 DH |
1898 | void kvm_s390_set_tod_clock(struct kvm *kvm, u64 tod) |
1899 | { | |
1900 | struct kvm_vcpu *vcpu; | |
1901 | int i; | |
1902 | ||
1903 | mutex_lock(&kvm->lock); | |
1904 | preempt_disable(); | |
1905 | kvm->arch.epoch = tod - get_tod_clock(); | |
1906 | kvm_s390_vcpu_block_all(kvm); | |
1907 | kvm_for_each_vcpu(i, vcpu, kvm) | |
1908 | vcpu->arch.sie_block->epoch = kvm->arch.epoch; | |
1909 | kvm_s390_vcpu_unblock_all(kvm); | |
1910 | preempt_enable(); | |
1911 | mutex_unlock(&kvm->lock); | |
1912 | } | |
1913 | ||
fa576c58 TH |
1914 | /** |
1915 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
1916 | * @vcpu: The corresponding virtual cpu | |
1917 | * @gpa: Guest physical address | |
1918 | * @writable: Whether the page should be writable or not | |
1919 | * | |
1920 | * Make sure that a guest page has been faulted-in on the host. | |
1921 | * | |
1922 | * Return: Zero on success, negative error code otherwise. | |
1923 | */ | |
1924 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 1925 | { |
527e30b4 MS |
1926 | return gmap_fault(vcpu->arch.gmap, gpa, |
1927 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
1928 | } |
1929 | ||
3c038e6b DD |
1930 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
1931 | unsigned long token) | |
1932 | { | |
1933 | struct kvm_s390_interrupt inti; | |
383d0b05 | 1934 | struct kvm_s390_irq irq; |
3c038e6b DD |
1935 | |
1936 | if (start_token) { | |
383d0b05 JF |
1937 | irq.u.ext.ext_params2 = token; |
1938 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
1939 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
1940 | } else { |
1941 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 1942 | inti.parm64 = token; |
3c038e6b DD |
1943 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
1944 | } | |
1945 | } | |
1946 | ||
1947 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
1948 | struct kvm_async_pf *work) | |
1949 | { | |
1950 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
1951 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
1952 | } | |
1953 | ||
1954 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
1955 | struct kvm_async_pf *work) | |
1956 | { | |
1957 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
1958 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
1959 | } | |
1960 | ||
1961 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
1962 | struct kvm_async_pf *work) | |
1963 | { | |
1964 | /* s390 will always inject the page directly */ | |
1965 | } | |
1966 | ||
1967 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
1968 | { | |
1969 | /* | |
1970 | * s390 will always inject the page directly, | |
1971 | * but we still want check_async_completion to cleanup | |
1972 | */ | |
1973 | return true; | |
1974 | } | |
1975 | ||
1976 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
1977 | { | |
1978 | hva_t hva; | |
1979 | struct kvm_arch_async_pf arch; | |
1980 | int rc; | |
1981 | ||
1982 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
1983 | return 0; | |
1984 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
1985 | vcpu->arch.pfault_compare) | |
1986 | return 0; | |
1987 | if (psw_extint_disabled(vcpu)) | |
1988 | return 0; | |
9a022067 | 1989 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
1990 | return 0; |
1991 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
1992 | return 0; | |
1993 | if (!vcpu->arch.gmap->pfault_enabled) | |
1994 | return 0; | |
1995 | ||
81480cc1 HC |
1996 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
1997 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
1998 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
1999 | return 0; |
2000 | ||
2001 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
2002 | return rc; | |
2003 | } | |
2004 | ||
3fb4c40f | 2005 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 2006 | { |
3fb4c40f | 2007 | int rc, cpuflags; |
e168bf8d | 2008 | |
3c038e6b DD |
2009 | /* |
2010 | * On s390 notifications for arriving pages will be delivered directly | |
2011 | * to the guest but the house keeping for completed pfaults is | |
2012 | * handled outside the worker. | |
2013 | */ | |
2014 | kvm_check_async_pf_completion(vcpu); | |
2015 | ||
5a32c1af | 2016 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
2017 | |
2018 | if (need_resched()) | |
2019 | schedule(); | |
2020 | ||
d3a73acb | 2021 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
2022 | s390_handle_mcck(); |
2023 | ||
79395031 JF |
2024 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
2025 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
2026 | if (rc) | |
2027 | return rc; | |
2028 | } | |
0ff31867 | 2029 | |
2c70fe44 CB |
2030 | rc = kvm_s390_handle_requests(vcpu); |
2031 | if (rc) | |
2032 | return rc; | |
2033 | ||
27291e21 DH |
2034 | if (guestdbg_enabled(vcpu)) { |
2035 | kvm_s390_backup_guest_per_regs(vcpu); | |
2036 | kvm_s390_patch_guest_per_regs(vcpu); | |
2037 | } | |
2038 | ||
b0c632db | 2039 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
2040 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
2041 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
2042 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 2043 | |
3fb4c40f TH |
2044 | return 0; |
2045 | } | |
2046 | ||
492d8642 TH |
2047 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
2048 | { | |
2049 | psw_t *psw = &vcpu->arch.sie_block->gpsw; | |
2050 | u8 opcode; | |
2051 | int rc; | |
2052 | ||
2053 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
2054 | trace_kvm_s390_sie_fault(vcpu); | |
2055 | ||
2056 | /* | |
2057 | * We want to inject an addressing exception, which is defined as a | |
2058 | * suppressing or terminating exception. However, since we came here | |
2059 | * by a DAT access exception, the PSW still points to the faulting | |
2060 | * instruction since DAT exceptions are nullifying. So we've got | |
2061 | * to look up the current opcode to get the length of the instruction | |
2062 | * to be able to forward the PSW. | |
2063 | */ | |
8ae04b8f | 2064 | rc = read_guest(vcpu, psw->addr, 0, &opcode, 1); |
492d8642 TH |
2065 | if (rc) |
2066 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
2067 | psw->addr = __rewind_psw(*psw, -insn_length(opcode)); | |
2068 | ||
2069 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
2070 | } | |
2071 | ||
3fb4c40f TH |
2072 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
2073 | { | |
24eb3a82 | 2074 | int rc = -1; |
2b29a9fd DD |
2075 | |
2076 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
2077 | vcpu->arch.sie_block->icptcode); | |
2078 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
2079 | ||
27291e21 DH |
2080 | if (guestdbg_enabled(vcpu)) |
2081 | kvm_s390_restore_guest_per_regs(vcpu); | |
2082 | ||
3fb4c40f | 2083 | if (exit_reason >= 0) { |
7c470539 | 2084 | rc = 0; |
210b1607 TH |
2085 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
2086 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
2087 | vcpu->run->s390_ucontrol.trans_exc_code = | |
2088 | current->thread.gmap_addr; | |
2089 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
2090 | rc = -EREMOTE; | |
24eb3a82 DD |
2091 | |
2092 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 2093 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 2094 | current->thread.gmap_pfault = 0; |
fa576c58 | 2095 | if (kvm_arch_setup_async_pf(vcpu)) { |
24eb3a82 | 2096 | rc = 0; |
fa576c58 TH |
2097 | } else { |
2098 | gpa_t gpa = current->thread.gmap_addr; | |
2099 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); | |
2100 | } | |
24eb3a82 DD |
2101 | } |
2102 | ||
492d8642 TH |
2103 | if (rc == -1) |
2104 | rc = vcpu_post_run_fault_in_sie(vcpu); | |
b0c632db | 2105 | |
5a32c1af | 2106 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 2107 | |
a76ccff6 TH |
2108 | if (rc == 0) { |
2109 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
2110 | /* Don't exit for host interrupts. */ |
2111 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
2112 | else |
2113 | rc = kvm_handle_sie_intercept(vcpu); | |
2114 | } | |
2115 | ||
3fb4c40f TH |
2116 | return rc; |
2117 | } | |
2118 | ||
2119 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
2120 | { | |
2121 | int rc, exit_reason; | |
2122 | ||
800c1065 TH |
2123 | /* |
2124 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
2125 | * ning the guest), so that memslots (and other stuff) are protected | |
2126 | */ | |
2127 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2128 | ||
a76ccff6 TH |
2129 | do { |
2130 | rc = vcpu_pre_run(vcpu); | |
2131 | if (rc) | |
2132 | break; | |
3fb4c40f | 2133 | |
800c1065 | 2134 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
2135 | /* |
2136 | * As PF_VCPU will be used in fault handler, between | |
2137 | * guest_enter and guest_exit should be no uaccess. | |
2138 | */ | |
0097d12e CB |
2139 | local_irq_disable(); |
2140 | __kvm_guest_enter(); | |
2141 | local_irq_enable(); | |
a76ccff6 TH |
2142 | exit_reason = sie64a(vcpu->arch.sie_block, |
2143 | vcpu->run->s.regs.gprs); | |
0097d12e CB |
2144 | local_irq_disable(); |
2145 | __kvm_guest_exit(); | |
2146 | local_irq_enable(); | |
800c1065 | 2147 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
2148 | |
2149 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 2150 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 2151 | |
800c1065 | 2152 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 2153 | return rc; |
b0c632db HC |
2154 | } |
2155 | ||
b028ee3e DH |
2156 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2157 | { | |
2158 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
2159 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
2160 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
2161 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
2162 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
2163 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
2164 | /* some control register changes require a tlb flush */ |
2165 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
2166 | } |
2167 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
2168 | vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; | |
2169 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; | |
2170 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
2171 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
2172 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
2173 | } | |
2174 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
2175 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
2176 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
2177 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
2178 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2179 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e DH |
2180 | } |
2181 | kvm_run->kvm_dirty_regs = 0; | |
2182 | } | |
2183 | ||
2184 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2185 | { | |
2186 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
2187 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
2188 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
2189 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
2190 | kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm; | |
2191 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; | |
2192 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
2193 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
2194 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
2195 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
2196 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
2197 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
2198 | } | |
2199 | ||
b0c632db HC |
2200 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2201 | { | |
8f2abe6a | 2202 | int rc; |
b0c632db HC |
2203 | sigset_t sigsaved; |
2204 | ||
27291e21 DH |
2205 | if (guestdbg_exit_pending(vcpu)) { |
2206 | kvm_s390_prepare_debug_exit(vcpu); | |
2207 | return 0; | |
2208 | } | |
2209 | ||
b0c632db HC |
2210 | if (vcpu->sigset_active) |
2211 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2212 | ||
6352e4d2 DH |
2213 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
2214 | kvm_s390_vcpu_start(vcpu); | |
2215 | } else if (is_vcpu_stopped(vcpu)) { | |
ea2cdd27 | 2216 | pr_err_ratelimited("can't run stopped vcpu %d\n", |
6352e4d2 DH |
2217 | vcpu->vcpu_id); |
2218 | return -EINVAL; | |
2219 | } | |
b0c632db | 2220 | |
b028ee3e | 2221 | sync_regs(vcpu, kvm_run); |
d7b0b5eb | 2222 | |
dab4079d | 2223 | might_fault(); |
a76ccff6 | 2224 | rc = __vcpu_run(vcpu); |
9ace903d | 2225 | |
b1d16c49 CE |
2226 | if (signal_pending(current) && !rc) { |
2227 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 2228 | rc = -EINTR; |
b1d16c49 | 2229 | } |
8f2abe6a | 2230 | |
27291e21 DH |
2231 | if (guestdbg_exit_pending(vcpu) && !rc) { |
2232 | kvm_s390_prepare_debug_exit(vcpu); | |
2233 | rc = 0; | |
2234 | } | |
2235 | ||
b8e660b8 | 2236 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
2237 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
2238 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
2239 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
2240 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
2241 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
2242 | rc = 0; | |
2243 | } | |
2244 | ||
2245 | if (rc == -EREMOTE) { | |
2246 | /* intercept was handled, but userspace support is needed | |
2247 | * kvm_run has been prepared by the handler */ | |
2248 | rc = 0; | |
2249 | } | |
b0c632db | 2250 | |
b028ee3e | 2251 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 2252 | |
b0c632db HC |
2253 | if (vcpu->sigset_active) |
2254 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2255 | ||
b0c632db | 2256 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 2257 | return rc; |
b0c632db HC |
2258 | } |
2259 | ||
b0c632db HC |
2260 | /* |
2261 | * store status at address | |
2262 | * we use have two special cases: | |
2263 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
2264 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
2265 | */ | |
d0bce605 | 2266 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 2267 | { |
092670cd | 2268 | unsigned char archmode = 1; |
fda902cb | 2269 | unsigned int px; |
178bd789 | 2270 | u64 clkcomp; |
d0bce605 | 2271 | int rc; |
b0c632db | 2272 | |
d0bce605 HC |
2273 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
2274 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 2275 | return -EFAULT; |
d0bce605 HC |
2276 | gpa = SAVE_AREA_BASE; |
2277 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { | |
2278 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 2279 | return -EFAULT; |
d0bce605 HC |
2280 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
2281 | } | |
2282 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), | |
2283 | vcpu->arch.guest_fpregs.fprs, 128); | |
2284 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), | |
2285 | vcpu->run->s.regs.gprs, 128); | |
2286 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), | |
2287 | &vcpu->arch.sie_block->gpsw, 16); | |
fda902cb | 2288 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 | 2289 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
fda902cb | 2290 | &px, 4); |
d0bce605 HC |
2291 | rc |= write_guest_abs(vcpu, |
2292 | gpa + offsetof(struct save_area, fp_ctrl_reg), | |
2293 | &vcpu->arch.guest_fpregs.fpc, 4); | |
2294 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), | |
2295 | &vcpu->arch.sie_block->todpr, 4); | |
2296 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), | |
2297 | &vcpu->arch.sie_block->cputm, 8); | |
178bd789 | 2298 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d0bce605 HC |
2299 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
2300 | &clkcomp, 8); | |
2301 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), | |
2302 | &vcpu->run->s.regs.acrs, 64); | |
2303 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), | |
2304 | &vcpu->arch.sie_block->gcr, 128); | |
2305 | return rc ? -EFAULT : 0; | |
b0c632db HC |
2306 | } |
2307 | ||
e879892c TH |
2308 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
2309 | { | |
2310 | /* | |
2311 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
2312 | * copying in vcpu load/put. Lets update our copies before we save | |
2313 | * it into the save area | |
2314 | */ | |
d0164ee2 | 2315 | save_fpu_regs(); |
9977e886 HB |
2316 | if (test_kvm_facility(vcpu->kvm, 129)) { |
2317 | /* | |
2318 | * If the vector extension is available, the vector registers | |
2319 | * which overlaps with floating-point registers are saved in | |
2320 | * the SIE-control block. Hence, extract the floating-point | |
2321 | * registers and the FPC value and store them in the | |
2322 | * guest_fpregs structure. | |
2323 | */ | |
9977e886 HB |
2324 | vcpu->arch.guest_fpregs.fpc = current->thread.fpu.fpc; |
2325 | convert_vx_to_fp(vcpu->arch.guest_fpregs.fprs, | |
2326 | current->thread.fpu.vxrs); | |
2327 | } else | |
2328 | save_fpu_to(&vcpu->arch.guest_fpregs); | |
e879892c TH |
2329 | save_access_regs(vcpu->run->s.regs.acrs); |
2330 | ||
2331 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
2332 | } | |
2333 | ||
bc17de7c EF |
2334 | /* |
2335 | * store additional status at address | |
2336 | */ | |
2337 | int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, | |
2338 | unsigned long gpa) | |
2339 | { | |
2340 | /* Only bits 0-53 are used for address formation */ | |
2341 | if (!(gpa & ~0x3ff)) | |
2342 | return 0; | |
2343 | ||
2344 | return write_guest_abs(vcpu, gpa & ~0x3ff, | |
2345 | (void *)&vcpu->run->s.regs.vrs, 512); | |
2346 | } | |
2347 | ||
2348 | int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
2349 | { | |
2350 | if (!test_kvm_facility(vcpu->kvm, 129)) | |
2351 | return 0; | |
2352 | ||
2353 | /* | |
2354 | * The guest VXRS are in the host VXRs due to the lazy | |
9977e886 HB |
2355 | * copying in vcpu load/put. We can simply call save_fpu_regs() |
2356 | * to save the current register state because we are in the | |
2357 | * middle of a load/put cycle. | |
2358 | * | |
2359 | * Let's update our copies before we save it into the save area. | |
bc17de7c | 2360 | */ |
d0164ee2 | 2361 | save_fpu_regs(); |
bc17de7c EF |
2362 | |
2363 | return kvm_s390_store_adtl_status_unloaded(vcpu, addr); | |
2364 | } | |
2365 | ||
8ad35755 DH |
2366 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2367 | { | |
2368 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
8e236546 | 2369 | kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
8ad35755 DH |
2370 | } |
2371 | ||
2372 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2373 | { | |
2374 | unsigned int i; | |
2375 | struct kvm_vcpu *vcpu; | |
2376 | ||
2377 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2378 | __disable_ibs_on_vcpu(vcpu); | |
2379 | } | |
2380 | } | |
2381 | ||
2382 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2383 | { | |
2384 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
8e236546 | 2385 | kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
8ad35755 DH |
2386 | } |
2387 | ||
6852d7b6 DH |
2388 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2389 | { | |
8ad35755 DH |
2390 | int i, online_vcpus, started_vcpus = 0; |
2391 | ||
2392 | if (!is_vcpu_stopped(vcpu)) | |
2393 | return; | |
2394 | ||
6852d7b6 | 2395 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2396 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2397 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2398 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2399 | ||
2400 | for (i = 0; i < online_vcpus; i++) { | |
2401 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2402 | started_vcpus++; | |
2403 | } | |
2404 | ||
2405 | if (started_vcpus == 0) { | |
2406 | /* we're the only active VCPU -> speed it up */ | |
2407 | __enable_ibs_on_vcpu(vcpu); | |
2408 | } else if (started_vcpus == 1) { | |
2409 | /* | |
2410 | * As we are starting a second VCPU, we have to disable | |
2411 | * the IBS facility on all VCPUs to remove potentially | |
2412 | * oustanding ENABLE requests. | |
2413 | */ | |
2414 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2415 | } | |
2416 | ||
805de8f4 | 2417 | atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2418 | /* |
2419 | * Another VCPU might have used IBS while we were offline. | |
2420 | * Let's play safe and flush the VCPU at startup. | |
2421 | */ | |
d3d692c8 | 2422 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2423 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2424 | return; |
6852d7b6 DH |
2425 | } |
2426 | ||
2427 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2428 | { | |
8ad35755 DH |
2429 | int i, online_vcpus, started_vcpus = 0; |
2430 | struct kvm_vcpu *started_vcpu = NULL; | |
2431 | ||
2432 | if (is_vcpu_stopped(vcpu)) | |
2433 | return; | |
2434 | ||
6852d7b6 | 2435 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2436 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2437 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2438 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2439 | ||
32f5ff63 | 2440 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 2441 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 2442 | |
805de8f4 | 2443 | atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2444 | __disable_ibs_on_vcpu(vcpu); |
2445 | ||
2446 | for (i = 0; i < online_vcpus; i++) { | |
2447 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
2448 | started_vcpus++; | |
2449 | started_vcpu = vcpu->kvm->vcpus[i]; | |
2450 | } | |
2451 | } | |
2452 | ||
2453 | if (started_vcpus == 1) { | |
2454 | /* | |
2455 | * As we only have one VCPU left, we want to enable the | |
2456 | * IBS facility for that VCPU to speed it up. | |
2457 | */ | |
2458 | __enable_ibs_on_vcpu(started_vcpu); | |
2459 | } | |
2460 | ||
433b9ee4 | 2461 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2462 | return; |
6852d7b6 DH |
2463 | } |
2464 | ||
d6712df9 CH |
2465 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
2466 | struct kvm_enable_cap *cap) | |
2467 | { | |
2468 | int r; | |
2469 | ||
2470 | if (cap->flags) | |
2471 | return -EINVAL; | |
2472 | ||
2473 | switch (cap->cap) { | |
fa6b7fe9 CH |
2474 | case KVM_CAP_S390_CSS_SUPPORT: |
2475 | if (!vcpu->kvm->arch.css_support) { | |
2476 | vcpu->kvm->arch.css_support = 1; | |
c92ea7b9 | 2477 | VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support"); |
fa6b7fe9 CH |
2478 | trace_kvm_s390_enable_css(vcpu->kvm); |
2479 | } | |
2480 | r = 0; | |
2481 | break; | |
d6712df9 CH |
2482 | default: |
2483 | r = -EINVAL; | |
2484 | break; | |
2485 | } | |
2486 | return r; | |
2487 | } | |
2488 | ||
41408c28 TH |
2489 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
2490 | struct kvm_s390_mem_op *mop) | |
2491 | { | |
2492 | void __user *uaddr = (void __user *)mop->buf; | |
2493 | void *tmpbuf = NULL; | |
2494 | int r, srcu_idx; | |
2495 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
2496 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
2497 | ||
2498 | if (mop->flags & ~supported_flags) | |
2499 | return -EINVAL; | |
2500 | ||
2501 | if (mop->size > MEM_OP_MAX_SIZE) | |
2502 | return -E2BIG; | |
2503 | ||
2504 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
2505 | tmpbuf = vmalloc(mop->size); | |
2506 | if (!tmpbuf) | |
2507 | return -ENOMEM; | |
2508 | } | |
2509 | ||
2510 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2511 | ||
2512 | switch (mop->op) { | |
2513 | case KVM_S390_MEMOP_LOGICAL_READ: | |
2514 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
2515 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, false); | |
2516 | break; | |
2517 | } | |
2518 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2519 | if (r == 0) { | |
2520 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
2521 | r = -EFAULT; | |
2522 | } | |
2523 | break; | |
2524 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
2525 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
2526 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, true); | |
2527 | break; | |
2528 | } | |
2529 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
2530 | r = -EFAULT; | |
2531 | break; | |
2532 | } | |
2533 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2534 | break; | |
2535 | default: | |
2536 | r = -EINVAL; | |
2537 | } | |
2538 | ||
2539 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
2540 | ||
2541 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
2542 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
2543 | ||
2544 | vfree(tmpbuf); | |
2545 | return r; | |
2546 | } | |
2547 | ||
b0c632db HC |
2548 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2549 | unsigned int ioctl, unsigned long arg) | |
2550 | { | |
2551 | struct kvm_vcpu *vcpu = filp->private_data; | |
2552 | void __user *argp = (void __user *)arg; | |
800c1065 | 2553 | int idx; |
bc923cc9 | 2554 | long r; |
b0c632db | 2555 | |
93736624 | 2556 | switch (ioctl) { |
47b43c52 JF |
2557 | case KVM_S390_IRQ: { |
2558 | struct kvm_s390_irq s390irq; | |
2559 | ||
2560 | r = -EFAULT; | |
2561 | if (copy_from_user(&s390irq, argp, sizeof(s390irq))) | |
2562 | break; | |
2563 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
2564 | break; | |
2565 | } | |
93736624 | 2566 | case KVM_S390_INTERRUPT: { |
ba5c1e9b | 2567 | struct kvm_s390_interrupt s390int; |
383d0b05 | 2568 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 2569 | |
93736624 | 2570 | r = -EFAULT; |
ba5c1e9b | 2571 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 2572 | break; |
383d0b05 JF |
2573 | if (s390int_to_s390irq(&s390int, &s390irq)) |
2574 | return -EINVAL; | |
2575 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 2576 | break; |
ba5c1e9b | 2577 | } |
b0c632db | 2578 | case KVM_S390_STORE_STATUS: |
800c1065 | 2579 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 2580 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 2581 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 2582 | break; |
b0c632db HC |
2583 | case KVM_S390_SET_INITIAL_PSW: { |
2584 | psw_t psw; | |
2585 | ||
bc923cc9 | 2586 | r = -EFAULT; |
b0c632db | 2587 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
2588 | break; |
2589 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
2590 | break; | |
b0c632db HC |
2591 | } |
2592 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
2593 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
2594 | break; | |
14eebd91 CO |
2595 | case KVM_SET_ONE_REG: |
2596 | case KVM_GET_ONE_REG: { | |
2597 | struct kvm_one_reg reg; | |
2598 | r = -EFAULT; | |
2599 | if (copy_from_user(®, argp, sizeof(reg))) | |
2600 | break; | |
2601 | if (ioctl == KVM_SET_ONE_REG) | |
2602 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
2603 | else | |
2604 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
2605 | break; | |
2606 | } | |
27e0393f CO |
2607 | #ifdef CONFIG_KVM_S390_UCONTROL |
2608 | case KVM_S390_UCAS_MAP: { | |
2609 | struct kvm_s390_ucas_mapping ucasmap; | |
2610 | ||
2611 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2612 | r = -EFAULT; | |
2613 | break; | |
2614 | } | |
2615 | ||
2616 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2617 | r = -EINVAL; | |
2618 | break; | |
2619 | } | |
2620 | ||
2621 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
2622 | ucasmap.vcpu_addr, ucasmap.length); | |
2623 | break; | |
2624 | } | |
2625 | case KVM_S390_UCAS_UNMAP: { | |
2626 | struct kvm_s390_ucas_mapping ucasmap; | |
2627 | ||
2628 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2629 | r = -EFAULT; | |
2630 | break; | |
2631 | } | |
2632 | ||
2633 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2634 | r = -EINVAL; | |
2635 | break; | |
2636 | } | |
2637 | ||
2638 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
2639 | ucasmap.length); | |
2640 | break; | |
2641 | } | |
2642 | #endif | |
ccc7910f | 2643 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 2644 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
2645 | break; |
2646 | } | |
d6712df9 CH |
2647 | case KVM_ENABLE_CAP: |
2648 | { | |
2649 | struct kvm_enable_cap cap; | |
2650 | r = -EFAULT; | |
2651 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
2652 | break; | |
2653 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
2654 | break; | |
2655 | } | |
41408c28 TH |
2656 | case KVM_S390_MEM_OP: { |
2657 | struct kvm_s390_mem_op mem_op; | |
2658 | ||
2659 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
2660 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
2661 | else | |
2662 | r = -EFAULT; | |
2663 | break; | |
2664 | } | |
816c7667 JF |
2665 | case KVM_S390_SET_IRQ_STATE: { |
2666 | struct kvm_s390_irq_state irq_state; | |
2667 | ||
2668 | r = -EFAULT; | |
2669 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2670 | break; | |
2671 | if (irq_state.len > VCPU_IRQS_MAX_BUF || | |
2672 | irq_state.len == 0 || | |
2673 | irq_state.len % sizeof(struct kvm_s390_irq) > 0) { | |
2674 | r = -EINVAL; | |
2675 | break; | |
2676 | } | |
2677 | r = kvm_s390_set_irq_state(vcpu, | |
2678 | (void __user *) irq_state.buf, | |
2679 | irq_state.len); | |
2680 | break; | |
2681 | } | |
2682 | case KVM_S390_GET_IRQ_STATE: { | |
2683 | struct kvm_s390_irq_state irq_state; | |
2684 | ||
2685 | r = -EFAULT; | |
2686 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2687 | break; | |
2688 | if (irq_state.len == 0) { | |
2689 | r = -EINVAL; | |
2690 | break; | |
2691 | } | |
2692 | r = kvm_s390_get_irq_state(vcpu, | |
2693 | (__u8 __user *) irq_state.buf, | |
2694 | irq_state.len); | |
2695 | break; | |
2696 | } | |
b0c632db | 2697 | default: |
3e6afcf1 | 2698 | r = -ENOTTY; |
b0c632db | 2699 | } |
bc923cc9 | 2700 | return r; |
b0c632db HC |
2701 | } |
2702 | ||
5b1c1493 CO |
2703 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
2704 | { | |
2705 | #ifdef CONFIG_KVM_S390_UCONTROL | |
2706 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
2707 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
2708 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
2709 | get_page(vmf->page); | |
2710 | return 0; | |
2711 | } | |
2712 | #endif | |
2713 | return VM_FAULT_SIGBUS; | |
2714 | } | |
2715 | ||
5587027c AK |
2716 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
2717 | unsigned long npages) | |
db3fe4eb TY |
2718 | { |
2719 | return 0; | |
2720 | } | |
2721 | ||
b0c632db | 2722 | /* Section: memory related */ |
f7784b8e MT |
2723 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
2724 | struct kvm_memory_slot *memslot, | |
09170a49 | 2725 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 2726 | enum kvm_mr_change change) |
b0c632db | 2727 | { |
dd2887e7 NW |
2728 | /* A few sanity checks. We can have memory slots which have to be |
2729 | located/ended at a segment boundary (1MB). The memory in userland is | |
2730 | ok to be fragmented into various different vmas. It is okay to mmap() | |
2731 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 2732 | |
598841ca | 2733 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
2734 | return -EINVAL; |
2735 | ||
598841ca | 2736 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
2737 | return -EINVAL; |
2738 | ||
f7784b8e MT |
2739 | return 0; |
2740 | } | |
2741 | ||
2742 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
09170a49 | 2743 | const struct kvm_userspace_memory_region *mem, |
8482644a | 2744 | const struct kvm_memory_slot *old, |
f36f3f28 | 2745 | const struct kvm_memory_slot *new, |
8482644a | 2746 | enum kvm_mr_change change) |
f7784b8e | 2747 | { |
f7850c92 | 2748 | int rc; |
f7784b8e | 2749 | |
2cef4deb CB |
2750 | /* If the basics of the memslot do not change, we do not want |
2751 | * to update the gmap. Every update causes several unnecessary | |
2752 | * segment translation exceptions. This is usually handled just | |
2753 | * fine by the normal fault handler + gmap, but it will also | |
2754 | * cause faults on the prefix page of running guest CPUs. | |
2755 | */ | |
2756 | if (old->userspace_addr == mem->userspace_addr && | |
2757 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
2758 | old->npages * PAGE_SIZE == mem->memory_size) | |
2759 | return; | |
598841ca CO |
2760 | |
2761 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
2762 | mem->guest_phys_addr, mem->memory_size); | |
2763 | if (rc) | |
ea2cdd27 | 2764 | pr_warn("failed to commit memory region\n"); |
598841ca | 2765 | return; |
b0c632db HC |
2766 | } |
2767 | ||
b0c632db HC |
2768 | static int __init kvm_s390_init(void) |
2769 | { | |
9d8d5786 | 2770 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
2771 | } |
2772 | ||
2773 | static void __exit kvm_s390_exit(void) | |
2774 | { | |
2775 | kvm_exit(); | |
2776 | } | |
2777 | ||
2778 | module_init(kvm_s390_init); | |
2779 | module_exit(kvm_s390_exit); | |
566af940 CH |
2780 | |
2781 | /* | |
2782 | * Enable autoloading of the kvm module. | |
2783 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
2784 | * since x86 takes a different approach. | |
2785 | */ | |
2786 | #include <linux/miscdevice.h> | |
2787 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
2788 | MODULE_ALIAS("devname:kvm"); |