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: |
18280d8b MM |
345 | if (MACHINE_HAS_VX) { |
346 | set_kvm_facility(kvm->arch.model.fac->mask, 129); | |
347 | set_kvm_facility(kvm->arch.model.fac->list, 129); | |
348 | r = 0; | |
349 | } else | |
350 | r = -EINVAL; | |
c92ea7b9 CB |
351 | VM_EVENT(kvm, 3, "ENABLE: CAP_S390_VECTOR_REGISTERS %s", |
352 | r ? "(not available)" : "(success)"); | |
68c55750 | 353 | break; |
e44fc8c9 | 354 | case KVM_CAP_S390_USER_STSI: |
c92ea7b9 | 355 | VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI"); |
e44fc8c9 ET |
356 | kvm->arch.user_stsi = 1; |
357 | r = 0; | |
358 | break; | |
d938dc55 CH |
359 | default: |
360 | r = -EINVAL; | |
361 | break; | |
362 | } | |
363 | return r; | |
364 | } | |
365 | ||
8c0a7ce6 DD |
366 | static int kvm_s390_get_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) |
367 | { | |
368 | int ret; | |
369 | ||
370 | switch (attr->attr) { | |
371 | case KVM_S390_VM_MEM_LIMIT_SIZE: | |
372 | ret = 0; | |
c92ea7b9 CB |
373 | VM_EVENT(kvm, 3, "QUERY: max guest memory: %lu bytes", |
374 | kvm->arch.gmap->asce_end); | |
8c0a7ce6 DD |
375 | if (put_user(kvm->arch.gmap->asce_end, (u64 __user *)attr->addr)) |
376 | ret = -EFAULT; | |
377 | break; | |
378 | default: | |
379 | ret = -ENXIO; | |
380 | break; | |
381 | } | |
382 | return ret; | |
383 | } | |
384 | ||
385 | static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *attr) | |
4f718eab DD |
386 | { |
387 | int ret; | |
388 | unsigned int idx; | |
389 | switch (attr->attr) { | |
390 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
e6db1d61 DD |
391 | /* enable CMMA only for z10 and later (EDAT_1) */ |
392 | ret = -EINVAL; | |
393 | if (!MACHINE_IS_LPAR || !MACHINE_HAS_EDAT1) | |
394 | break; | |
395 | ||
4f718eab | 396 | ret = -EBUSY; |
c92ea7b9 | 397 | VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support"); |
4f718eab DD |
398 | mutex_lock(&kvm->lock); |
399 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
400 | kvm->arch.use_cmma = 1; | |
401 | ret = 0; | |
402 | } | |
403 | mutex_unlock(&kvm->lock); | |
404 | break; | |
405 | case KVM_S390_VM_MEM_CLR_CMMA: | |
c3489155 DD |
406 | ret = -EINVAL; |
407 | if (!kvm->arch.use_cmma) | |
408 | break; | |
409 | ||
c92ea7b9 | 410 | VM_EVENT(kvm, 3, "%s", "RESET: CMMA states"); |
4f718eab DD |
411 | mutex_lock(&kvm->lock); |
412 | idx = srcu_read_lock(&kvm->srcu); | |
a13cff31 | 413 | s390_reset_cmma(kvm->arch.gmap->mm); |
4f718eab DD |
414 | srcu_read_unlock(&kvm->srcu, idx); |
415 | mutex_unlock(&kvm->lock); | |
416 | ret = 0; | |
417 | break; | |
8c0a7ce6 DD |
418 | case KVM_S390_VM_MEM_LIMIT_SIZE: { |
419 | unsigned long new_limit; | |
420 | ||
421 | if (kvm_is_ucontrol(kvm)) | |
422 | return -EINVAL; | |
423 | ||
424 | if (get_user(new_limit, (u64 __user *)attr->addr)) | |
425 | return -EFAULT; | |
426 | ||
427 | if (new_limit > kvm->arch.gmap->asce_end) | |
428 | return -E2BIG; | |
429 | ||
430 | ret = -EBUSY; | |
431 | mutex_lock(&kvm->lock); | |
432 | if (atomic_read(&kvm->online_vcpus) == 0) { | |
433 | /* gmap_alloc will round the limit up */ | |
434 | struct gmap *new = gmap_alloc(current->mm, new_limit); | |
435 | ||
436 | if (!new) { | |
437 | ret = -ENOMEM; | |
438 | } else { | |
439 | gmap_free(kvm->arch.gmap); | |
440 | new->private = kvm; | |
441 | kvm->arch.gmap = new; | |
442 | ret = 0; | |
443 | } | |
444 | } | |
445 | mutex_unlock(&kvm->lock); | |
c92ea7b9 | 446 | VM_EVENT(kvm, 3, "SET: max guest memory: %lu bytes", new_limit); |
8c0a7ce6 DD |
447 | break; |
448 | } | |
4f718eab DD |
449 | default: |
450 | ret = -ENXIO; | |
451 | break; | |
452 | } | |
453 | return ret; | |
454 | } | |
455 | ||
a374e892 TK |
456 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu); |
457 | ||
458 | static int kvm_s390_vm_set_crypto(struct kvm *kvm, struct kvm_device_attr *attr) | |
459 | { | |
460 | struct kvm_vcpu *vcpu; | |
461 | int i; | |
462 | ||
9d8d5786 | 463 | if (!test_kvm_facility(kvm, 76)) |
a374e892 TK |
464 | return -EINVAL; |
465 | ||
466 | mutex_lock(&kvm->lock); | |
467 | switch (attr->attr) { | |
468 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
469 | get_random_bytes( | |
470 | kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
471 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
472 | kvm->arch.crypto.aes_kw = 1; | |
c92ea7b9 | 473 | VM_EVENT(kvm, 3, "%s", "ENABLE: AES keywrapping support"); |
a374e892 TK |
474 | break; |
475 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
476 | get_random_bytes( | |
477 | kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
478 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
479 | kvm->arch.crypto.dea_kw = 1; | |
c92ea7b9 | 480 | VM_EVENT(kvm, 3, "%s", "ENABLE: DEA keywrapping support"); |
a374e892 TK |
481 | break; |
482 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
483 | kvm->arch.crypto.aes_kw = 0; | |
484 | memset(kvm->arch.crypto.crycb->aes_wrapping_key_mask, 0, | |
485 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
c92ea7b9 | 486 | VM_EVENT(kvm, 3, "%s", "DISABLE: AES keywrapping support"); |
a374e892 TK |
487 | break; |
488 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
489 | kvm->arch.crypto.dea_kw = 0; | |
490 | memset(kvm->arch.crypto.crycb->dea_wrapping_key_mask, 0, | |
491 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
c92ea7b9 | 492 | VM_EVENT(kvm, 3, "%s", "DISABLE: DEA keywrapping support"); |
a374e892 TK |
493 | break; |
494 | default: | |
495 | mutex_unlock(&kvm->lock); | |
496 | return -ENXIO; | |
497 | } | |
498 | ||
499 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
500 | kvm_s390_vcpu_crypto_setup(vcpu); | |
501 | exit_sie(vcpu); | |
502 | } | |
503 | mutex_unlock(&kvm->lock); | |
504 | return 0; | |
505 | } | |
506 | ||
72f25020 JH |
507 | static int kvm_s390_set_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) |
508 | { | |
509 | u8 gtod_high; | |
510 | ||
511 | if (copy_from_user(>od_high, (void __user *)attr->addr, | |
512 | sizeof(gtod_high))) | |
513 | return -EFAULT; | |
514 | ||
515 | if (gtod_high != 0) | |
516 | return -EINVAL; | |
c92ea7b9 | 517 | VM_EVENT(kvm, 3, "SET: TOD extension: 0x%x\n", gtod_high); |
72f25020 JH |
518 | |
519 | return 0; | |
520 | } | |
521 | ||
522 | static int kvm_s390_set_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
523 | { | |
524 | struct kvm_vcpu *cur_vcpu; | |
525 | unsigned int vcpu_idx; | |
5a3d883a | 526 | u64 gtod; |
72f25020 JH |
527 | |
528 | if (copy_from_user(>od, (void __user *)attr->addr, sizeof(gtod))) | |
529 | return -EFAULT; | |
530 | ||
72f25020 | 531 | mutex_lock(&kvm->lock); |
fdf03650 | 532 | preempt_disable(); |
5a3d883a | 533 | kvm->arch.epoch = gtod - get_tod_clock(); |
27406cd5 CB |
534 | kvm_s390_vcpu_block_all(kvm); |
535 | kvm_for_each_vcpu(vcpu_idx, cur_vcpu, kvm) | |
72f25020 | 536 | cur_vcpu->arch.sie_block->epoch = kvm->arch.epoch; |
27406cd5 | 537 | kvm_s390_vcpu_unblock_all(kvm); |
fdf03650 | 538 | preempt_enable(); |
72f25020 | 539 | mutex_unlock(&kvm->lock); |
c92ea7b9 | 540 | VM_EVENT(kvm, 3, "SET: TOD base: 0x%llx\n", gtod); |
72f25020 JH |
541 | return 0; |
542 | } | |
543 | ||
544 | static int kvm_s390_set_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
545 | { | |
546 | int ret; | |
547 | ||
548 | if (attr->flags) | |
549 | return -EINVAL; | |
550 | ||
551 | switch (attr->attr) { | |
552 | case KVM_S390_VM_TOD_HIGH: | |
553 | ret = kvm_s390_set_tod_high(kvm, attr); | |
554 | break; | |
555 | case KVM_S390_VM_TOD_LOW: | |
556 | ret = kvm_s390_set_tod_low(kvm, attr); | |
557 | break; | |
558 | default: | |
559 | ret = -ENXIO; | |
560 | break; | |
561 | } | |
562 | return ret; | |
563 | } | |
564 | ||
565 | static int kvm_s390_get_tod_high(struct kvm *kvm, struct kvm_device_attr *attr) | |
566 | { | |
567 | u8 gtod_high = 0; | |
568 | ||
569 | if (copy_to_user((void __user *)attr->addr, >od_high, | |
570 | sizeof(gtod_high))) | |
571 | return -EFAULT; | |
c92ea7b9 | 572 | VM_EVENT(kvm, 3, "QUERY: TOD extension: 0x%x\n", gtod_high); |
72f25020 JH |
573 | |
574 | return 0; | |
575 | } | |
576 | ||
577 | static int kvm_s390_get_tod_low(struct kvm *kvm, struct kvm_device_attr *attr) | |
578 | { | |
5a3d883a | 579 | u64 gtod; |
72f25020 | 580 | |
fdf03650 | 581 | preempt_disable(); |
5a3d883a | 582 | gtod = get_tod_clock() + kvm->arch.epoch; |
fdf03650 | 583 | preempt_enable(); |
72f25020 JH |
584 | if (copy_to_user((void __user *)attr->addr, >od, sizeof(gtod))) |
585 | return -EFAULT; | |
c92ea7b9 | 586 | VM_EVENT(kvm, 3, "QUERY: TOD base: 0x%llx\n", gtod); |
72f25020 JH |
587 | |
588 | return 0; | |
589 | } | |
590 | ||
591 | static int kvm_s390_get_tod(struct kvm *kvm, struct kvm_device_attr *attr) | |
592 | { | |
593 | int ret; | |
594 | ||
595 | if (attr->flags) | |
596 | return -EINVAL; | |
597 | ||
598 | switch (attr->attr) { | |
599 | case KVM_S390_VM_TOD_HIGH: | |
600 | ret = kvm_s390_get_tod_high(kvm, attr); | |
601 | break; | |
602 | case KVM_S390_VM_TOD_LOW: | |
603 | ret = kvm_s390_get_tod_low(kvm, attr); | |
604 | break; | |
605 | default: | |
606 | ret = -ENXIO; | |
607 | break; | |
608 | } | |
609 | return ret; | |
610 | } | |
611 | ||
658b6eda MM |
612 | static int kvm_s390_set_processor(struct kvm *kvm, struct kvm_device_attr *attr) |
613 | { | |
614 | struct kvm_s390_vm_cpu_processor *proc; | |
615 | int ret = 0; | |
616 | ||
617 | mutex_lock(&kvm->lock); | |
618 | if (atomic_read(&kvm->online_vcpus)) { | |
619 | ret = -EBUSY; | |
620 | goto out; | |
621 | } | |
622 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
623 | if (!proc) { | |
624 | ret = -ENOMEM; | |
625 | goto out; | |
626 | } | |
627 | if (!copy_from_user(proc, (void __user *)attr->addr, | |
628 | sizeof(*proc))) { | |
629 | memcpy(&kvm->arch.model.cpu_id, &proc->cpuid, | |
630 | sizeof(struct cpuid)); | |
631 | kvm->arch.model.ibc = proc->ibc; | |
981467c9 | 632 | memcpy(kvm->arch.model.fac->list, proc->fac_list, |
658b6eda MM |
633 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
634 | } else | |
635 | ret = -EFAULT; | |
636 | kfree(proc); | |
637 | out: | |
638 | mutex_unlock(&kvm->lock); | |
639 | return ret; | |
640 | } | |
641 | ||
642 | static int kvm_s390_set_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
643 | { | |
644 | int ret = -ENXIO; | |
645 | ||
646 | switch (attr->attr) { | |
647 | case KVM_S390_VM_CPU_PROCESSOR: | |
648 | ret = kvm_s390_set_processor(kvm, attr); | |
649 | break; | |
650 | } | |
651 | return ret; | |
652 | } | |
653 | ||
654 | static int kvm_s390_get_processor(struct kvm *kvm, struct kvm_device_attr *attr) | |
655 | { | |
656 | struct kvm_s390_vm_cpu_processor *proc; | |
657 | int ret = 0; | |
658 | ||
659 | proc = kzalloc(sizeof(*proc), GFP_KERNEL); | |
660 | if (!proc) { | |
661 | ret = -ENOMEM; | |
662 | goto out; | |
663 | } | |
664 | memcpy(&proc->cpuid, &kvm->arch.model.cpu_id, sizeof(struct cpuid)); | |
665 | proc->ibc = kvm->arch.model.ibc; | |
981467c9 | 666 | memcpy(&proc->fac_list, kvm->arch.model.fac->list, S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
667 | if (copy_to_user((void __user *)attr->addr, proc, sizeof(*proc))) |
668 | ret = -EFAULT; | |
669 | kfree(proc); | |
670 | out: | |
671 | return ret; | |
672 | } | |
673 | ||
674 | static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr) | |
675 | { | |
676 | struct kvm_s390_vm_cpu_machine *mach; | |
677 | int ret = 0; | |
678 | ||
679 | mach = kzalloc(sizeof(*mach), GFP_KERNEL); | |
680 | if (!mach) { | |
681 | ret = -ENOMEM; | |
682 | goto out; | |
683 | } | |
684 | get_cpu_id((struct cpuid *) &mach->cpuid); | |
37c5f6c8 | 685 | mach->ibc = sclp.ibc; |
981467c9 MM |
686 | memcpy(&mach->fac_mask, kvm->arch.model.fac->mask, |
687 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
658b6eda | 688 | memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list, |
94422ee8 | 689 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
658b6eda MM |
690 | if (copy_to_user((void __user *)attr->addr, mach, sizeof(*mach))) |
691 | ret = -EFAULT; | |
692 | kfree(mach); | |
693 | out: | |
694 | return ret; | |
695 | } | |
696 | ||
697 | static int kvm_s390_get_cpu_model(struct kvm *kvm, struct kvm_device_attr *attr) | |
698 | { | |
699 | int ret = -ENXIO; | |
700 | ||
701 | switch (attr->attr) { | |
702 | case KVM_S390_VM_CPU_PROCESSOR: | |
703 | ret = kvm_s390_get_processor(kvm, attr); | |
704 | break; | |
705 | case KVM_S390_VM_CPU_MACHINE: | |
706 | ret = kvm_s390_get_machine(kvm, attr); | |
707 | break; | |
708 | } | |
709 | return ret; | |
710 | } | |
711 | ||
f2061656 DD |
712 | static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr) |
713 | { | |
714 | int ret; | |
715 | ||
716 | switch (attr->group) { | |
4f718eab | 717 | case KVM_S390_VM_MEM_CTRL: |
8c0a7ce6 | 718 | ret = kvm_s390_set_mem_control(kvm, attr); |
4f718eab | 719 | break; |
72f25020 JH |
720 | case KVM_S390_VM_TOD: |
721 | ret = kvm_s390_set_tod(kvm, attr); | |
722 | break; | |
658b6eda MM |
723 | case KVM_S390_VM_CPU_MODEL: |
724 | ret = kvm_s390_set_cpu_model(kvm, attr); | |
725 | break; | |
a374e892 TK |
726 | case KVM_S390_VM_CRYPTO: |
727 | ret = kvm_s390_vm_set_crypto(kvm, attr); | |
728 | break; | |
f2061656 DD |
729 | default: |
730 | ret = -ENXIO; | |
731 | break; | |
732 | } | |
733 | ||
734 | return ret; | |
735 | } | |
736 | ||
737 | static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
738 | { | |
8c0a7ce6 DD |
739 | int ret; |
740 | ||
741 | switch (attr->group) { | |
742 | case KVM_S390_VM_MEM_CTRL: | |
743 | ret = kvm_s390_get_mem_control(kvm, attr); | |
744 | break; | |
72f25020 JH |
745 | case KVM_S390_VM_TOD: |
746 | ret = kvm_s390_get_tod(kvm, attr); | |
747 | break; | |
658b6eda MM |
748 | case KVM_S390_VM_CPU_MODEL: |
749 | ret = kvm_s390_get_cpu_model(kvm, attr); | |
750 | break; | |
8c0a7ce6 DD |
751 | default: |
752 | ret = -ENXIO; | |
753 | break; | |
754 | } | |
755 | ||
756 | return ret; | |
f2061656 DD |
757 | } |
758 | ||
759 | static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr) | |
760 | { | |
761 | int ret; | |
762 | ||
763 | switch (attr->group) { | |
4f718eab DD |
764 | case KVM_S390_VM_MEM_CTRL: |
765 | switch (attr->attr) { | |
766 | case KVM_S390_VM_MEM_ENABLE_CMMA: | |
767 | case KVM_S390_VM_MEM_CLR_CMMA: | |
8c0a7ce6 | 768 | case KVM_S390_VM_MEM_LIMIT_SIZE: |
4f718eab DD |
769 | ret = 0; |
770 | break; | |
771 | default: | |
772 | ret = -ENXIO; | |
773 | break; | |
774 | } | |
775 | break; | |
72f25020 JH |
776 | case KVM_S390_VM_TOD: |
777 | switch (attr->attr) { | |
778 | case KVM_S390_VM_TOD_LOW: | |
779 | case KVM_S390_VM_TOD_HIGH: | |
780 | ret = 0; | |
781 | break; | |
782 | default: | |
783 | ret = -ENXIO; | |
784 | break; | |
785 | } | |
786 | break; | |
658b6eda MM |
787 | case KVM_S390_VM_CPU_MODEL: |
788 | switch (attr->attr) { | |
789 | case KVM_S390_VM_CPU_PROCESSOR: | |
790 | case KVM_S390_VM_CPU_MACHINE: | |
791 | ret = 0; | |
792 | break; | |
793 | default: | |
794 | ret = -ENXIO; | |
795 | break; | |
796 | } | |
797 | break; | |
a374e892 TK |
798 | case KVM_S390_VM_CRYPTO: |
799 | switch (attr->attr) { | |
800 | case KVM_S390_VM_CRYPTO_ENABLE_AES_KW: | |
801 | case KVM_S390_VM_CRYPTO_ENABLE_DEA_KW: | |
802 | case KVM_S390_VM_CRYPTO_DISABLE_AES_KW: | |
803 | case KVM_S390_VM_CRYPTO_DISABLE_DEA_KW: | |
804 | ret = 0; | |
805 | break; | |
806 | default: | |
807 | ret = -ENXIO; | |
808 | break; | |
809 | } | |
810 | break; | |
f2061656 DD |
811 | default: |
812 | ret = -ENXIO; | |
813 | break; | |
814 | } | |
815 | ||
816 | return ret; | |
817 | } | |
818 | ||
30ee2a98 JH |
819 | static long kvm_s390_get_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) |
820 | { | |
821 | uint8_t *keys; | |
822 | uint64_t hva; | |
823 | unsigned long curkey; | |
824 | int i, r = 0; | |
825 | ||
826 | if (args->flags != 0) | |
827 | return -EINVAL; | |
828 | ||
829 | /* Is this guest using storage keys? */ | |
830 | if (!mm_use_skey(current->mm)) | |
831 | return KVM_S390_GET_SKEYS_NONE; | |
832 | ||
833 | /* Enforce sane limit on memory allocation */ | |
834 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
835 | return -EINVAL; | |
836 | ||
837 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
838 | GFP_KERNEL | __GFP_NOWARN); | |
839 | if (!keys) | |
840 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
841 | if (!keys) | |
842 | return -ENOMEM; | |
843 | ||
844 | for (i = 0; i < args->count; i++) { | |
845 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
846 | if (kvm_is_error_hva(hva)) { | |
847 | r = -EFAULT; | |
848 | goto out; | |
849 | } | |
850 | ||
851 | curkey = get_guest_storage_key(current->mm, hva); | |
852 | if (IS_ERR_VALUE(curkey)) { | |
853 | r = curkey; | |
854 | goto out; | |
855 | } | |
856 | keys[i] = curkey; | |
857 | } | |
858 | ||
859 | r = copy_to_user((uint8_t __user *)args->skeydata_addr, keys, | |
860 | sizeof(uint8_t) * args->count); | |
861 | if (r) | |
862 | r = -EFAULT; | |
863 | out: | |
864 | kvfree(keys); | |
865 | return r; | |
866 | } | |
867 | ||
868 | static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args) | |
869 | { | |
870 | uint8_t *keys; | |
871 | uint64_t hva; | |
872 | int i, r = 0; | |
873 | ||
874 | if (args->flags != 0) | |
875 | return -EINVAL; | |
876 | ||
877 | /* Enforce sane limit on memory allocation */ | |
878 | if (args->count < 1 || args->count > KVM_S390_SKEYS_MAX) | |
879 | return -EINVAL; | |
880 | ||
881 | keys = kmalloc_array(args->count, sizeof(uint8_t), | |
882 | GFP_KERNEL | __GFP_NOWARN); | |
883 | if (!keys) | |
884 | keys = vmalloc(sizeof(uint8_t) * args->count); | |
885 | if (!keys) | |
886 | return -ENOMEM; | |
887 | ||
888 | r = copy_from_user(keys, (uint8_t __user *)args->skeydata_addr, | |
889 | sizeof(uint8_t) * args->count); | |
890 | if (r) { | |
891 | r = -EFAULT; | |
892 | goto out; | |
893 | } | |
894 | ||
895 | /* Enable storage key handling for the guest */ | |
14d4a425 DD |
896 | r = s390_enable_skey(); |
897 | if (r) | |
898 | goto out; | |
30ee2a98 JH |
899 | |
900 | for (i = 0; i < args->count; i++) { | |
901 | hva = gfn_to_hva(kvm, args->start_gfn + i); | |
902 | if (kvm_is_error_hva(hva)) { | |
903 | r = -EFAULT; | |
904 | goto out; | |
905 | } | |
906 | ||
907 | /* Lowest order bit is reserved */ | |
908 | if (keys[i] & 0x01) { | |
909 | r = -EINVAL; | |
910 | goto out; | |
911 | } | |
912 | ||
913 | r = set_guest_storage_key(current->mm, hva, | |
914 | (unsigned long)keys[i], 0); | |
915 | if (r) | |
916 | goto out; | |
917 | } | |
918 | out: | |
919 | kvfree(keys); | |
920 | return r; | |
921 | } | |
922 | ||
b0c632db HC |
923 | long kvm_arch_vm_ioctl(struct file *filp, |
924 | unsigned int ioctl, unsigned long arg) | |
925 | { | |
926 | struct kvm *kvm = filp->private_data; | |
927 | void __user *argp = (void __user *)arg; | |
f2061656 | 928 | struct kvm_device_attr attr; |
b0c632db HC |
929 | int r; |
930 | ||
931 | switch (ioctl) { | |
ba5c1e9b CO |
932 | case KVM_S390_INTERRUPT: { |
933 | struct kvm_s390_interrupt s390int; | |
934 | ||
935 | r = -EFAULT; | |
936 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
937 | break; | |
938 | r = kvm_s390_inject_vm(kvm, &s390int); | |
939 | break; | |
940 | } | |
d938dc55 CH |
941 | case KVM_ENABLE_CAP: { |
942 | struct kvm_enable_cap cap; | |
943 | r = -EFAULT; | |
944 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
945 | break; | |
946 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
947 | break; | |
948 | } | |
84223598 CH |
949 | case KVM_CREATE_IRQCHIP: { |
950 | struct kvm_irq_routing_entry routing; | |
951 | ||
952 | r = -EINVAL; | |
953 | if (kvm->arch.use_irqchip) { | |
954 | /* Set up dummy routing. */ | |
955 | memset(&routing, 0, sizeof(routing)); | |
152b2839 | 956 | r = kvm_set_irq_routing(kvm, &routing, 0, 0); |
84223598 CH |
957 | } |
958 | break; | |
959 | } | |
f2061656 DD |
960 | case KVM_SET_DEVICE_ATTR: { |
961 | r = -EFAULT; | |
962 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
963 | break; | |
964 | r = kvm_s390_vm_set_attr(kvm, &attr); | |
965 | break; | |
966 | } | |
967 | case KVM_GET_DEVICE_ATTR: { | |
968 | r = -EFAULT; | |
969 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
970 | break; | |
971 | r = kvm_s390_vm_get_attr(kvm, &attr); | |
972 | break; | |
973 | } | |
974 | case KVM_HAS_DEVICE_ATTR: { | |
975 | r = -EFAULT; | |
976 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) | |
977 | break; | |
978 | r = kvm_s390_vm_has_attr(kvm, &attr); | |
979 | break; | |
980 | } | |
30ee2a98 JH |
981 | case KVM_S390_GET_SKEYS: { |
982 | struct kvm_s390_skeys args; | |
983 | ||
984 | r = -EFAULT; | |
985 | if (copy_from_user(&args, argp, | |
986 | sizeof(struct kvm_s390_skeys))) | |
987 | break; | |
988 | r = kvm_s390_get_skeys(kvm, &args); | |
989 | break; | |
990 | } | |
991 | case KVM_S390_SET_SKEYS: { | |
992 | struct kvm_s390_skeys args; | |
993 | ||
994 | r = -EFAULT; | |
995 | if (copy_from_user(&args, argp, | |
996 | sizeof(struct kvm_s390_skeys))) | |
997 | break; | |
998 | r = kvm_s390_set_skeys(kvm, &args); | |
999 | break; | |
1000 | } | |
b0c632db | 1001 | default: |
367e1319 | 1002 | r = -ENOTTY; |
b0c632db HC |
1003 | } |
1004 | ||
1005 | return r; | |
1006 | } | |
1007 | ||
45c9b47c TK |
1008 | static int kvm_s390_query_ap_config(u8 *config) |
1009 | { | |
1010 | u32 fcn_code = 0x04000000UL; | |
86044c8c | 1011 | u32 cc = 0; |
45c9b47c | 1012 | |
86044c8c | 1013 | memset(config, 0, 128); |
45c9b47c TK |
1014 | asm volatile( |
1015 | "lgr 0,%1\n" | |
1016 | "lgr 2,%2\n" | |
1017 | ".long 0xb2af0000\n" /* PQAP(QCI) */ | |
86044c8c | 1018 | "0: ipm %0\n" |
45c9b47c | 1019 | "srl %0,28\n" |
86044c8c CB |
1020 | "1:\n" |
1021 | EX_TABLE(0b, 1b) | |
1022 | : "+r" (cc) | |
45c9b47c TK |
1023 | : "r" (fcn_code), "r" (config) |
1024 | : "cc", "0", "2", "memory" | |
1025 | ); | |
1026 | ||
1027 | return cc; | |
1028 | } | |
1029 | ||
1030 | static int kvm_s390_apxa_installed(void) | |
1031 | { | |
1032 | u8 config[128]; | |
1033 | int cc; | |
1034 | ||
1035 | if (test_facility(2) && test_facility(12)) { | |
1036 | cc = kvm_s390_query_ap_config(config); | |
1037 | ||
1038 | if (cc) | |
1039 | pr_err("PQAP(QCI) failed with cc=%d", cc); | |
1040 | else | |
1041 | return config[0] & 0x40; | |
1042 | } | |
1043 | ||
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | static void kvm_s390_set_crycb_format(struct kvm *kvm) | |
1048 | { | |
1049 | kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; | |
1050 | ||
1051 | if (kvm_s390_apxa_installed()) | |
1052 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; | |
1053 | else | |
1054 | kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; | |
1055 | } | |
1056 | ||
9d8d5786 MM |
1057 | static void kvm_s390_get_cpu_id(struct cpuid *cpu_id) |
1058 | { | |
1059 | get_cpu_id(cpu_id); | |
1060 | cpu_id->version = 0xff; | |
1061 | } | |
1062 | ||
5102ee87 TK |
1063 | static int kvm_s390_crypto_init(struct kvm *kvm) |
1064 | { | |
9d8d5786 | 1065 | if (!test_kvm_facility(kvm, 76)) |
5102ee87 TK |
1066 | return 0; |
1067 | ||
1068 | kvm->arch.crypto.crycb = kzalloc(sizeof(*kvm->arch.crypto.crycb), | |
1069 | GFP_KERNEL | GFP_DMA); | |
1070 | if (!kvm->arch.crypto.crycb) | |
1071 | return -ENOMEM; | |
1072 | ||
45c9b47c | 1073 | kvm_s390_set_crycb_format(kvm); |
5102ee87 | 1074 | |
ed6f76b4 TK |
1075 | /* Enable AES/DEA protected key functions by default */ |
1076 | kvm->arch.crypto.aes_kw = 1; | |
1077 | kvm->arch.crypto.dea_kw = 1; | |
1078 | get_random_bytes(kvm->arch.crypto.crycb->aes_wrapping_key_mask, | |
1079 | sizeof(kvm->arch.crypto.crycb->aes_wrapping_key_mask)); | |
1080 | get_random_bytes(kvm->arch.crypto.crycb->dea_wrapping_key_mask, | |
1081 | sizeof(kvm->arch.crypto.crycb->dea_wrapping_key_mask)); | |
a374e892 | 1082 | |
5102ee87 TK |
1083 | return 0; |
1084 | } | |
1085 | ||
e08b9637 | 1086 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 1087 | { |
9d8d5786 | 1088 | int i, rc; |
b0c632db | 1089 | char debug_name[16]; |
f6c137ff | 1090 | static unsigned long sca_offset; |
b0c632db | 1091 | |
e08b9637 CO |
1092 | rc = -EINVAL; |
1093 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1094 | if (type & ~KVM_VM_S390_UCONTROL) | |
1095 | goto out_err; | |
1096 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
1097 | goto out_err; | |
1098 | #else | |
1099 | if (type) | |
1100 | goto out_err; | |
1101 | #endif | |
1102 | ||
b0c632db HC |
1103 | rc = s390_enable_sie(); |
1104 | if (rc) | |
d89f5eff | 1105 | goto out_err; |
b0c632db | 1106 | |
b290411a CO |
1107 | rc = -ENOMEM; |
1108 | ||
b0c632db HC |
1109 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
1110 | if (!kvm->arch.sca) | |
d89f5eff | 1111 | goto out_err; |
f6c137ff CB |
1112 | spin_lock(&kvm_lock); |
1113 | sca_offset = (sca_offset + 16) & 0x7f0; | |
1114 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); | |
1115 | spin_unlock(&kvm_lock); | |
b0c632db HC |
1116 | |
1117 | sprintf(debug_name, "kvm-%u", current->pid); | |
1118 | ||
1cb9cf72 | 1119 | kvm->arch.dbf = debug_register(debug_name, 32, 1, 7 * sizeof(long)); |
b0c632db | 1120 | if (!kvm->arch.dbf) |
40f5b735 | 1121 | goto out_err; |
b0c632db | 1122 | |
9d8d5786 MM |
1123 | /* |
1124 | * The architectural maximum amount of facilities is 16 kbit. To store | |
1125 | * this amount, 2 kbyte of memory is required. Thus we need a full | |
981467c9 MM |
1126 | * page to hold the guest facility list (arch.model.fac->list) and the |
1127 | * facility mask (arch.model.fac->mask). Its address size has to be | |
9d8d5786 MM |
1128 | * 31 bits and word aligned. |
1129 | */ | |
1130 | kvm->arch.model.fac = | |
981467c9 | 1131 | (struct kvm_s390_fac *) get_zeroed_page(GFP_KERNEL | GFP_DMA); |
9d8d5786 | 1132 | if (!kvm->arch.model.fac) |
40f5b735 | 1133 | goto out_err; |
9d8d5786 | 1134 | |
fb5bf93f | 1135 | /* Populate the facility mask initially. */ |
981467c9 | 1136 | memcpy(kvm->arch.model.fac->mask, S390_lowcore.stfle_fac_list, |
94422ee8 | 1137 | S390_ARCH_FAC_LIST_SIZE_BYTE); |
9d8d5786 MM |
1138 | for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) { |
1139 | if (i < kvm_s390_fac_list_mask_size()) | |
981467c9 | 1140 | kvm->arch.model.fac->mask[i] &= kvm_s390_fac_list_mask[i]; |
9d8d5786 | 1141 | else |
981467c9 | 1142 | kvm->arch.model.fac->mask[i] = 0UL; |
9d8d5786 MM |
1143 | } |
1144 | ||
981467c9 MM |
1145 | /* Populate the facility list initially. */ |
1146 | memcpy(kvm->arch.model.fac->list, kvm->arch.model.fac->mask, | |
1147 | S390_ARCH_FAC_LIST_SIZE_BYTE); | |
1148 | ||
9d8d5786 | 1149 | kvm_s390_get_cpu_id(&kvm->arch.model.cpu_id); |
37c5f6c8 | 1150 | kvm->arch.model.ibc = sclp.ibc & 0x0fff; |
9d8d5786 | 1151 | |
5102ee87 | 1152 | if (kvm_s390_crypto_init(kvm) < 0) |
40f5b735 | 1153 | goto out_err; |
5102ee87 | 1154 | |
ba5c1e9b | 1155 | spin_lock_init(&kvm->arch.float_int.lock); |
6d3da241 JF |
1156 | for (i = 0; i < FIRQ_LIST_COUNT; i++) |
1157 | INIT_LIST_HEAD(&kvm->arch.float_int.lists[i]); | |
8a242234 | 1158 | init_waitqueue_head(&kvm->arch.ipte_wq); |
a6b7e459 | 1159 | mutex_init(&kvm->arch.ipte_mutex); |
ba5c1e9b | 1160 | |
b0c632db | 1161 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
78f26131 | 1162 | VM_EVENT(kvm, 3, "vm created with type %lu", type); |
b0c632db | 1163 | |
e08b9637 CO |
1164 | if (type & KVM_VM_S390_UCONTROL) { |
1165 | kvm->arch.gmap = NULL; | |
1166 | } else { | |
0349985a | 1167 | kvm->arch.gmap = gmap_alloc(current->mm, (1UL << 44) - 1); |
e08b9637 | 1168 | if (!kvm->arch.gmap) |
40f5b735 | 1169 | goto out_err; |
2c70fe44 | 1170 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 1171 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 1172 | } |
fa6b7fe9 CH |
1173 | |
1174 | kvm->arch.css_support = 0; | |
84223598 | 1175 | kvm->arch.use_irqchip = 0; |
72f25020 | 1176 | kvm->arch.epoch = 0; |
fa6b7fe9 | 1177 | |
8ad35755 | 1178 | spin_lock_init(&kvm->arch.start_stop_lock); |
78f26131 | 1179 | KVM_EVENT(3, "vm 0x%p created by pid %u", kvm, current->pid); |
8ad35755 | 1180 | |
d89f5eff | 1181 | return 0; |
40f5b735 | 1182 | out_err: |
5102ee87 | 1183 | kfree(kvm->arch.crypto.crycb); |
9d8d5786 | 1184 | free_page((unsigned long)kvm->arch.model.fac); |
598841ca | 1185 | debug_unregister(kvm->arch.dbf); |
b0c632db | 1186 | free_page((unsigned long)(kvm->arch.sca)); |
78f26131 | 1187 | KVM_EVENT(3, "creation of vm failed: %d", rc); |
d89f5eff | 1188 | return rc; |
b0c632db HC |
1189 | } |
1190 | ||
d329c035 CB |
1191 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
1192 | { | |
1193 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 1194 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
67335e63 | 1195 | kvm_s390_clear_local_irqs(vcpu); |
3c038e6b | 1196 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
1197 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
1198 | clear_bit(63 - vcpu->vcpu_id, | |
1199 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
1200 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
1201 | (__u64) vcpu->arch.sie_block) | |
1202 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
1203 | } | |
abf4a71e | 1204 | smp_mb(); |
27e0393f CO |
1205 | |
1206 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1207 | gmap_free(vcpu->arch.gmap); | |
1208 | ||
e6db1d61 | 1209 | if (vcpu->kvm->arch.use_cmma) |
b31605c1 | 1210 | kvm_s390_vcpu_unsetup_cmma(vcpu); |
d329c035 | 1211 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 1212 | |
6692cef3 | 1213 | kvm_vcpu_uninit(vcpu); |
b110feaf | 1214 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
1215 | } |
1216 | ||
1217 | static void kvm_free_vcpus(struct kvm *kvm) | |
1218 | { | |
1219 | unsigned int i; | |
988a2cae | 1220 | struct kvm_vcpu *vcpu; |
d329c035 | 1221 | |
988a2cae GN |
1222 | kvm_for_each_vcpu(i, vcpu, kvm) |
1223 | kvm_arch_vcpu_destroy(vcpu); | |
1224 | ||
1225 | mutex_lock(&kvm->lock); | |
1226 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
1227 | kvm->vcpus[i] = NULL; | |
1228 | ||
1229 | atomic_set(&kvm->online_vcpus, 0); | |
1230 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
1231 | } |
1232 | ||
b0c632db HC |
1233 | void kvm_arch_destroy_vm(struct kvm *kvm) |
1234 | { | |
d329c035 | 1235 | kvm_free_vcpus(kvm); |
9d8d5786 | 1236 | free_page((unsigned long)kvm->arch.model.fac); |
b0c632db | 1237 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 1238 | debug_unregister(kvm->arch.dbf); |
5102ee87 | 1239 | kfree(kvm->arch.crypto.crycb); |
27e0393f CO |
1240 | if (!kvm_is_ucontrol(kvm)) |
1241 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 1242 | kvm_s390_destroy_adapters(kvm); |
67335e63 | 1243 | kvm_s390_clear_float_irqs(kvm); |
78f26131 | 1244 | KVM_EVENT(3, "vm 0x%p destroyed", kvm); |
b0c632db HC |
1245 | } |
1246 | ||
1247 | /* Section: vcpu related */ | |
dafd032a DD |
1248 | static int __kvm_ucontrol_vcpu_init(struct kvm_vcpu *vcpu) |
1249 | { | |
1250 | vcpu->arch.gmap = gmap_alloc(current->mm, -1UL); | |
1251 | if (!vcpu->arch.gmap) | |
1252 | return -ENOMEM; | |
1253 | vcpu->arch.gmap->private = vcpu->kvm; | |
1254 | ||
1255 | return 0; | |
1256 | } | |
1257 | ||
b0c632db HC |
1258 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
1259 | { | |
3c038e6b DD |
1260 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1261 | kvm_clear_async_pf_completion_queue(vcpu); | |
59674c1a CB |
1262 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
1263 | KVM_SYNC_GPRS | | |
9eed0735 | 1264 | KVM_SYNC_ACRS | |
b028ee3e DH |
1265 | KVM_SYNC_CRS | |
1266 | KVM_SYNC_ARCH0 | | |
1267 | KVM_SYNC_PFAULT; | |
68c55750 EF |
1268 | if (test_kvm_facility(vcpu->kvm, 129)) |
1269 | vcpu->run->kvm_valid_regs |= KVM_SYNC_VRS; | |
dafd032a DD |
1270 | |
1271 | if (kvm_is_ucontrol(vcpu->kvm)) | |
1272 | return __kvm_ucontrol_vcpu_init(vcpu); | |
1273 | ||
b0c632db HC |
1274 | return 0; |
1275 | } | |
1276 | ||
9977e886 HB |
1277 | /* |
1278 | * Backs up the current FP/VX register save area on a particular | |
1279 | * destination. Used to switch between different register save | |
1280 | * areas. | |
1281 | */ | |
1282 | static inline void save_fpu_to(struct fpu *dst) | |
1283 | { | |
1284 | dst->fpc = current->thread.fpu.fpc; | |
1285 | dst->flags = current->thread.fpu.flags; | |
1286 | dst->regs = current->thread.fpu.regs; | |
1287 | } | |
1288 | ||
1289 | /* | |
1290 | * Switches the FP/VX register save area from which to lazy | |
1291 | * restore register contents. | |
1292 | */ | |
1293 | static inline void load_fpu_from(struct fpu *from) | |
1294 | { | |
1295 | current->thread.fpu.fpc = from->fpc; | |
1296 | current->thread.fpu.flags = from->flags; | |
1297 | current->thread.fpu.regs = from->regs; | |
1298 | } | |
1299 | ||
b0c632db HC |
1300 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1301 | { | |
9977e886 | 1302 | /* Save host register state */ |
d0164ee2 | 1303 | save_fpu_regs(); |
9977e886 | 1304 | save_fpu_to(&vcpu->arch.host_fpregs); |
96b2d7a8 | 1305 | |
18280d8b | 1306 | if (test_kvm_facility(vcpu->kvm, 129)) { |
9977e886 HB |
1307 | current->thread.fpu.fpc = vcpu->run->s.regs.fpc; |
1308 | current->thread.fpu.flags = FPU_USE_VX; | |
1309 | /* | |
1310 | * Use the register save area in the SIE-control block | |
1311 | * for register restore and save in kvm_arch_vcpu_put() | |
1312 | */ | |
1313 | current->thread.fpu.vxrs = | |
1314 | (__vector128 *)&vcpu->run->s.regs.vrs; | |
1315 | /* Always enable the vector extension for KVM */ | |
1316 | __ctl_set_vx(); | |
1317 | } else | |
1318 | load_fpu_from(&vcpu->arch.guest_fpregs); | |
1319 | ||
1320 | if (test_fp_ctl(current->thread.fpu.fpc)) | |
96b2d7a8 | 1321 | /* User space provided an invalid FPC, let's clear it */ |
9977e886 HB |
1322 | current->thread.fpu.fpc = 0; |
1323 | ||
1324 | save_access_regs(vcpu->arch.host_acrs); | |
59674c1a | 1325 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 1326 | gmap_enable(vcpu->arch.gmap); |
805de8f4 | 1327 | atomic_or(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
1328 | } |
1329 | ||
1330 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1331 | { | |
805de8f4 | 1332 | atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 1333 | gmap_disable(vcpu->arch.gmap); |
9977e886 | 1334 | |
d0164ee2 | 1335 | save_fpu_regs(); |
9977e886 | 1336 | |
18280d8b | 1337 | if (test_kvm_facility(vcpu->kvm, 129)) |
9977e886 HB |
1338 | /* |
1339 | * kvm_arch_vcpu_load() set up the register save area to | |
1340 | * the &vcpu->run->s.regs.vrs and, thus, the vector registers | |
1341 | * are already saved. Only the floating-point control must be | |
1342 | * copied. | |
1343 | */ | |
1344 | vcpu->run->s.regs.fpc = current->thread.fpu.fpc; | |
68c55750 | 1345 | else |
9977e886 HB |
1346 | save_fpu_to(&vcpu->arch.guest_fpregs); |
1347 | load_fpu_from(&vcpu->arch.host_fpregs); | |
1348 | ||
1349 | save_access_regs(vcpu->run->s.regs.acrs); | |
b0c632db HC |
1350 | restore_access_regs(vcpu->arch.host_acrs); |
1351 | } | |
1352 | ||
1353 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
1354 | { | |
1355 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
1356 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
1357 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 1358 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
1359 | vcpu->arch.sie_block->cputm = 0UL; |
1360 | vcpu->arch.sie_block->ckc = 0UL; | |
1361 | vcpu->arch.sie_block->todpr = 0; | |
1362 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
1363 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
1364 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
1365 | vcpu->arch.guest_fpregs.fpc = 0; | |
1366 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
1367 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 1368 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
1369 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
1370 | kvm_clear_async_pf_completion_queue(vcpu); | |
6352e4d2 DH |
1371 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) |
1372 | kvm_s390_vcpu_stop(vcpu); | |
2ed10cc1 | 1373 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
1374 | } |
1375 | ||
31928aa5 | 1376 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
42897d86 | 1377 | { |
72f25020 | 1378 | mutex_lock(&vcpu->kvm->lock); |
fdf03650 | 1379 | preempt_disable(); |
72f25020 | 1380 | vcpu->arch.sie_block->epoch = vcpu->kvm->arch.epoch; |
fdf03650 | 1381 | preempt_enable(); |
72f25020 | 1382 | mutex_unlock(&vcpu->kvm->lock); |
dafd032a DD |
1383 | if (!kvm_is_ucontrol(vcpu->kvm)) |
1384 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; | |
42897d86 MT |
1385 | } |
1386 | ||
5102ee87 TK |
1387 | static void kvm_s390_vcpu_crypto_setup(struct kvm_vcpu *vcpu) |
1388 | { | |
9d8d5786 | 1389 | if (!test_kvm_facility(vcpu->kvm, 76)) |
5102ee87 TK |
1390 | return; |
1391 | ||
a374e892 TK |
1392 | vcpu->arch.sie_block->ecb3 &= ~(ECB3_AES | ECB3_DEA); |
1393 | ||
1394 | if (vcpu->kvm->arch.crypto.aes_kw) | |
1395 | vcpu->arch.sie_block->ecb3 |= ECB3_AES; | |
1396 | if (vcpu->kvm->arch.crypto.dea_kw) | |
1397 | vcpu->arch.sie_block->ecb3 |= ECB3_DEA; | |
1398 | ||
5102ee87 TK |
1399 | vcpu->arch.sie_block->crycbd = vcpu->kvm->arch.crypto.crycbd; |
1400 | } | |
1401 | ||
b31605c1 DD |
1402 | void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu) |
1403 | { | |
1404 | free_page(vcpu->arch.sie_block->cbrlo); | |
1405 | vcpu->arch.sie_block->cbrlo = 0; | |
1406 | } | |
1407 | ||
1408 | int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu) | |
1409 | { | |
1410 | vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL); | |
1411 | if (!vcpu->arch.sie_block->cbrlo) | |
1412 | return -ENOMEM; | |
1413 | ||
1414 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
1415 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
1416 | return 0; | |
1417 | } | |
1418 | ||
91520f1a MM |
1419 | static void kvm_s390_vcpu_setup_model(struct kvm_vcpu *vcpu) |
1420 | { | |
1421 | struct kvm_s390_cpu_model *model = &vcpu->kvm->arch.model; | |
1422 | ||
1423 | vcpu->arch.cpu_id = model->cpu_id; | |
1424 | vcpu->arch.sie_block->ibc = model->ibc; | |
1425 | vcpu->arch.sie_block->fac = (int) (long) model->fac->list; | |
1426 | } | |
1427 | ||
b0c632db HC |
1428 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
1429 | { | |
b31605c1 | 1430 | int rc = 0; |
b31288fa | 1431 | |
9e6dabef CH |
1432 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
1433 | CPUSTAT_SM | | |
a4a4f191 GH |
1434 | CPUSTAT_STOPPED); |
1435 | ||
53df84f8 | 1436 | if (test_kvm_facility(vcpu->kvm, 78)) |
805de8f4 | 1437 | atomic_or(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags); |
53df84f8 | 1438 | else if (test_kvm_facility(vcpu->kvm, 8)) |
805de8f4 | 1439 | atomic_or(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); |
a4a4f191 | 1440 | |
91520f1a MM |
1441 | kvm_s390_vcpu_setup_model(vcpu); |
1442 | ||
fc34531d | 1443 | vcpu->arch.sie_block->ecb = 6; |
9d8d5786 | 1444 | if (test_kvm_facility(vcpu->kvm, 50) && test_kvm_facility(vcpu->kvm, 73)) |
7feb6bb8 MM |
1445 | vcpu->arch.sie_block->ecb |= 0x10; |
1446 | ||
69d0d3a3 | 1447 | vcpu->arch.sie_block->ecb2 = 8; |
ea5f4969 | 1448 | vcpu->arch.sie_block->eca = 0xC1002000U; |
37c5f6c8 | 1449 | if (sclp.has_siif) |
217a4406 | 1450 | vcpu->arch.sie_block->eca |= 1; |
37c5f6c8 | 1451 | if (sclp.has_sigpif) |
ea5f4969 | 1452 | vcpu->arch.sie_block->eca |= 0x10000000U; |
18280d8b | 1453 | if (test_kvm_facility(vcpu->kvm, 129)) { |
13211ea7 EF |
1454 | vcpu->arch.sie_block->eca |= 0x00020000; |
1455 | vcpu->arch.sie_block->ecd |= 0x20000000; | |
1456 | } | |
492d8642 | 1457 | vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE; |
5a5e6536 | 1458 | |
e6db1d61 | 1459 | if (vcpu->kvm->arch.use_cmma) { |
b31605c1 DD |
1460 | rc = kvm_s390_vcpu_setup_cmma(vcpu); |
1461 | if (rc) | |
1462 | return rc; | |
b31288fa | 1463 | } |
0ac96caf | 1464 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
ca872302 | 1465 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
9d8d5786 | 1466 | |
5102ee87 TK |
1467 | kvm_s390_vcpu_crypto_setup(vcpu); |
1468 | ||
b31605c1 | 1469 | return rc; |
b0c632db HC |
1470 | } |
1471 | ||
1472 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1473 | unsigned int id) | |
1474 | { | |
4d47555a | 1475 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 1476 | struct sie_page *sie_page; |
4d47555a CO |
1477 | int rc = -EINVAL; |
1478 | ||
1479 | if (id >= KVM_MAX_VCPUS) | |
1480 | goto out; | |
1481 | ||
1482 | rc = -ENOMEM; | |
b0c632db | 1483 | |
b110feaf | 1484 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 1485 | if (!vcpu) |
4d47555a | 1486 | goto out; |
b0c632db | 1487 | |
7feb6bb8 MM |
1488 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
1489 | if (!sie_page) | |
b0c632db HC |
1490 | goto out_free_cpu; |
1491 | ||
7feb6bb8 MM |
1492 | vcpu->arch.sie_block = &sie_page->sie_block; |
1493 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
1494 | ||
b0c632db | 1495 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
1496 | if (!kvm_is_ucontrol(kvm)) { |
1497 | if (!kvm->arch.sca) { | |
1498 | WARN_ON_ONCE(1); | |
1499 | goto out_free_cpu; | |
1500 | } | |
1501 | if (!kvm->arch.sca->cpu[id].sda) | |
1502 | kvm->arch.sca->cpu[id].sda = | |
1503 | (__u64) vcpu->arch.sie_block; | |
1504 | vcpu->arch.sie_block->scaoh = | |
1505 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
1506 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
1507 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
1508 | } | |
b0c632db | 1509 | |
ba5c1e9b | 1510 | spin_lock_init(&vcpu->arch.local_int.lock); |
ba5c1e9b | 1511 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
d0321a24 | 1512 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 1513 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 1514 | |
9977e886 HB |
1515 | /* |
1516 | * Allocate a save area for floating-point registers. If the vector | |
1517 | * extension is available, register contents are saved in the SIE | |
1518 | * control block. The allocated save area is still required in | |
1519 | * particular places, for example, in kvm_s390_vcpu_store_status(). | |
1520 | */ | |
1521 | vcpu->arch.guest_fpregs.fprs = kzalloc(sizeof(freg_t) * __NUM_FPRS, | |
1522 | GFP_KERNEL); | |
1523 | if (!vcpu->arch.guest_fpregs.fprs) { | |
1524 | rc = -ENOMEM; | |
1525 | goto out_free_sie_block; | |
1526 | } | |
1527 | ||
b0c632db HC |
1528 | rc = kvm_vcpu_init(vcpu, kvm, id); |
1529 | if (rc) | |
7b06bf2f | 1530 | goto out_free_sie_block; |
b0c632db HC |
1531 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
1532 | vcpu->arch.sie_block); | |
ade38c31 | 1533 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 1534 | |
b0c632db | 1535 | return vcpu; |
7b06bf2f WY |
1536 | out_free_sie_block: |
1537 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 1538 | out_free_cpu: |
b110feaf | 1539 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 1540 | out: |
b0c632db HC |
1541 | return ERR_PTR(rc); |
1542 | } | |
1543 | ||
b0c632db HC |
1544 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
1545 | { | |
9a022067 | 1546 | return kvm_s390_vcpu_has_irq(vcpu, 0); |
b0c632db HC |
1547 | } |
1548 | ||
27406cd5 | 1549 | void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu) |
49b99e1e | 1550 | { |
805de8f4 | 1551 | atomic_or(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1552 | exit_sie(vcpu); |
49b99e1e CB |
1553 | } |
1554 | ||
27406cd5 | 1555 | void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu) |
49b99e1e | 1556 | { |
805de8f4 | 1557 | atomic_andnot(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); |
49b99e1e CB |
1558 | } |
1559 | ||
8e236546 CB |
1560 | static void kvm_s390_vcpu_request(struct kvm_vcpu *vcpu) |
1561 | { | |
805de8f4 | 1562 | atomic_or(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
61a6df54 | 1563 | exit_sie(vcpu); |
8e236546 CB |
1564 | } |
1565 | ||
1566 | static void kvm_s390_vcpu_request_handled(struct kvm_vcpu *vcpu) | |
1567 | { | |
9bf9fde2 | 1568 | atomic_andnot(PROG_REQUEST, &vcpu->arch.sie_block->prog20); |
8e236546 CB |
1569 | } |
1570 | ||
49b99e1e CB |
1571 | /* |
1572 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
1573 | * If the CPU is not running (e.g. waiting as idle) the function will | |
1574 | * return immediately. */ | |
1575 | void exit_sie(struct kvm_vcpu *vcpu) | |
1576 | { | |
805de8f4 | 1577 | atomic_or(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); |
49b99e1e CB |
1578 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) |
1579 | cpu_relax(); | |
1580 | } | |
1581 | ||
8e236546 CB |
1582 | /* Kick a guest cpu out of SIE to process a request synchronously */ |
1583 | void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu) | |
49b99e1e | 1584 | { |
8e236546 CB |
1585 | kvm_make_request(req, vcpu); |
1586 | kvm_s390_vcpu_request(vcpu); | |
49b99e1e CB |
1587 | } |
1588 | ||
2c70fe44 CB |
1589 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
1590 | { | |
1591 | int i; | |
1592 | struct kvm *kvm = gmap->private; | |
1593 | struct kvm_vcpu *vcpu; | |
1594 | ||
1595 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1596 | /* match against both prefix pages */ | |
fda902cb | 1597 | if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) { |
2c70fe44 | 1598 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); |
8e236546 | 1599 | kvm_s390_sync_request(KVM_REQ_MMU_RELOAD, vcpu); |
2c70fe44 CB |
1600 | } |
1601 | } | |
1602 | } | |
1603 | ||
b6d33834 CD |
1604 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
1605 | { | |
1606 | /* kvm common code refers to this, but never calls it */ | |
1607 | BUG(); | |
1608 | return 0; | |
1609 | } | |
1610 | ||
14eebd91 CO |
1611 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
1612 | struct kvm_one_reg *reg) | |
1613 | { | |
1614 | int r = -EINVAL; | |
1615 | ||
1616 | switch (reg->id) { | |
29b7c71b CO |
1617 | case KVM_REG_S390_TODPR: |
1618 | r = put_user(vcpu->arch.sie_block->todpr, | |
1619 | (u32 __user *)reg->addr); | |
1620 | break; | |
1621 | case KVM_REG_S390_EPOCHDIFF: | |
1622 | r = put_user(vcpu->arch.sie_block->epoch, | |
1623 | (u64 __user *)reg->addr); | |
1624 | break; | |
46a6dd1c J |
1625 | case KVM_REG_S390_CPU_TIMER: |
1626 | r = put_user(vcpu->arch.sie_block->cputm, | |
1627 | (u64 __user *)reg->addr); | |
1628 | break; | |
1629 | case KVM_REG_S390_CLOCK_COMP: | |
1630 | r = put_user(vcpu->arch.sie_block->ckc, | |
1631 | (u64 __user *)reg->addr); | |
1632 | break; | |
536336c2 DD |
1633 | case KVM_REG_S390_PFTOKEN: |
1634 | r = put_user(vcpu->arch.pfault_token, | |
1635 | (u64 __user *)reg->addr); | |
1636 | break; | |
1637 | case KVM_REG_S390_PFCOMPARE: | |
1638 | r = put_user(vcpu->arch.pfault_compare, | |
1639 | (u64 __user *)reg->addr); | |
1640 | break; | |
1641 | case KVM_REG_S390_PFSELECT: | |
1642 | r = put_user(vcpu->arch.pfault_select, | |
1643 | (u64 __user *)reg->addr); | |
1644 | break; | |
672550fb CB |
1645 | case KVM_REG_S390_PP: |
1646 | r = put_user(vcpu->arch.sie_block->pp, | |
1647 | (u64 __user *)reg->addr); | |
1648 | break; | |
afa45ff5 CB |
1649 | case KVM_REG_S390_GBEA: |
1650 | r = put_user(vcpu->arch.sie_block->gbea, | |
1651 | (u64 __user *)reg->addr); | |
1652 | break; | |
14eebd91 CO |
1653 | default: |
1654 | break; | |
1655 | } | |
1656 | ||
1657 | return r; | |
1658 | } | |
1659 | ||
1660 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
1661 | struct kvm_one_reg *reg) | |
1662 | { | |
1663 | int r = -EINVAL; | |
1664 | ||
1665 | switch (reg->id) { | |
29b7c71b CO |
1666 | case KVM_REG_S390_TODPR: |
1667 | r = get_user(vcpu->arch.sie_block->todpr, | |
1668 | (u32 __user *)reg->addr); | |
1669 | break; | |
1670 | case KVM_REG_S390_EPOCHDIFF: | |
1671 | r = get_user(vcpu->arch.sie_block->epoch, | |
1672 | (u64 __user *)reg->addr); | |
1673 | break; | |
46a6dd1c J |
1674 | case KVM_REG_S390_CPU_TIMER: |
1675 | r = get_user(vcpu->arch.sie_block->cputm, | |
1676 | (u64 __user *)reg->addr); | |
1677 | break; | |
1678 | case KVM_REG_S390_CLOCK_COMP: | |
1679 | r = get_user(vcpu->arch.sie_block->ckc, | |
1680 | (u64 __user *)reg->addr); | |
1681 | break; | |
536336c2 DD |
1682 | case KVM_REG_S390_PFTOKEN: |
1683 | r = get_user(vcpu->arch.pfault_token, | |
1684 | (u64 __user *)reg->addr); | |
9fbd8082 DH |
1685 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
1686 | kvm_clear_async_pf_completion_queue(vcpu); | |
536336c2 DD |
1687 | break; |
1688 | case KVM_REG_S390_PFCOMPARE: | |
1689 | r = get_user(vcpu->arch.pfault_compare, | |
1690 | (u64 __user *)reg->addr); | |
1691 | break; | |
1692 | case KVM_REG_S390_PFSELECT: | |
1693 | r = get_user(vcpu->arch.pfault_select, | |
1694 | (u64 __user *)reg->addr); | |
1695 | break; | |
672550fb CB |
1696 | case KVM_REG_S390_PP: |
1697 | r = get_user(vcpu->arch.sie_block->pp, | |
1698 | (u64 __user *)reg->addr); | |
1699 | break; | |
afa45ff5 CB |
1700 | case KVM_REG_S390_GBEA: |
1701 | r = get_user(vcpu->arch.sie_block->gbea, | |
1702 | (u64 __user *)reg->addr); | |
1703 | break; | |
14eebd91 CO |
1704 | default: |
1705 | break; | |
1706 | } | |
1707 | ||
1708 | return r; | |
1709 | } | |
b6d33834 | 1710 | |
b0c632db HC |
1711 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
1712 | { | |
b0c632db | 1713 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
1714 | return 0; |
1715 | } | |
1716 | ||
1717 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1718 | { | |
5a32c1af | 1719 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
1720 | return 0; |
1721 | } | |
1722 | ||
1723 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1724 | { | |
5a32c1af | 1725 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
1726 | return 0; |
1727 | } | |
1728 | ||
1729 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
1730 | struct kvm_sregs *sregs) | |
1731 | { | |
59674c1a | 1732 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 1733 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 1734 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
1735 | return 0; |
1736 | } | |
1737 | ||
1738 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
1739 | struct kvm_sregs *sregs) | |
1740 | { | |
59674c1a | 1741 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 1742 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
1743 | return 0; |
1744 | } | |
1745 | ||
1746 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1747 | { | |
4725c860 MS |
1748 | if (test_fp_ctl(fpu->fpc)) |
1749 | return -EINVAL; | |
9977e886 | 1750 | memcpy(vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 | 1751 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
d0164ee2 | 1752 | save_fpu_regs(); |
9977e886 | 1753 | load_fpu_from(&vcpu->arch.guest_fpregs); |
b0c632db HC |
1754 | return 0; |
1755 | } | |
1756 | ||
1757 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1758 | { | |
9977e886 | 1759 | memcpy(&fpu->fprs, vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
b0c632db | 1760 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; |
b0c632db HC |
1761 | return 0; |
1762 | } | |
1763 | ||
1764 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
1765 | { | |
1766 | int rc = 0; | |
1767 | ||
7a42fdc2 | 1768 | if (!is_vcpu_stopped(vcpu)) |
b0c632db | 1769 | rc = -EBUSY; |
d7b0b5eb CO |
1770 | else { |
1771 | vcpu->run->psw_mask = psw.mask; | |
1772 | vcpu->run->psw_addr = psw.addr; | |
1773 | } | |
b0c632db HC |
1774 | return rc; |
1775 | } | |
1776 | ||
1777 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
1778 | struct kvm_translation *tr) | |
1779 | { | |
1780 | return -EINVAL; /* not implemented yet */ | |
1781 | } | |
1782 | ||
27291e21 DH |
1783 | #define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \ |
1784 | KVM_GUESTDBG_USE_HW_BP | \ | |
1785 | KVM_GUESTDBG_ENABLE) | |
1786 | ||
d0bfb940 JK |
1787 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
1788 | struct kvm_guest_debug *dbg) | |
b0c632db | 1789 | { |
27291e21 DH |
1790 | int rc = 0; |
1791 | ||
1792 | vcpu->guest_debug = 0; | |
1793 | kvm_s390_clear_bp_data(vcpu); | |
1794 | ||
2de3bfc2 | 1795 | if (dbg->control & ~VALID_GUESTDBG_FLAGS) |
27291e21 DH |
1796 | return -EINVAL; |
1797 | ||
1798 | if (dbg->control & KVM_GUESTDBG_ENABLE) { | |
1799 | vcpu->guest_debug = dbg->control; | |
1800 | /* enforce guest PER */ | |
805de8f4 | 1801 | atomic_or(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
1802 | |
1803 | if (dbg->control & KVM_GUESTDBG_USE_HW_BP) | |
1804 | rc = kvm_s390_import_bp_data(vcpu, dbg); | |
1805 | } else { | |
805de8f4 | 1806 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
1807 | vcpu->arch.guestdbg.last_bp = 0; |
1808 | } | |
1809 | ||
1810 | if (rc) { | |
1811 | vcpu->guest_debug = 0; | |
1812 | kvm_s390_clear_bp_data(vcpu); | |
805de8f4 | 1813 | atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags); |
27291e21 DH |
1814 | } |
1815 | ||
1816 | return rc; | |
b0c632db HC |
1817 | } |
1818 | ||
62d9f0db MT |
1819 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
1820 | struct kvm_mp_state *mp_state) | |
1821 | { | |
6352e4d2 DH |
1822 | /* CHECK_STOP and LOAD are not supported yet */ |
1823 | return is_vcpu_stopped(vcpu) ? KVM_MP_STATE_STOPPED : | |
1824 | KVM_MP_STATE_OPERATING; | |
62d9f0db MT |
1825 | } |
1826 | ||
1827 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
1828 | struct kvm_mp_state *mp_state) | |
1829 | { | |
6352e4d2 DH |
1830 | int rc = 0; |
1831 | ||
1832 | /* user space knows about this interface - let it control the state */ | |
1833 | vcpu->kvm->arch.user_cpu_state_ctrl = 1; | |
1834 | ||
1835 | switch (mp_state->mp_state) { | |
1836 | case KVM_MP_STATE_STOPPED: | |
1837 | kvm_s390_vcpu_stop(vcpu); | |
1838 | break; | |
1839 | case KVM_MP_STATE_OPERATING: | |
1840 | kvm_s390_vcpu_start(vcpu); | |
1841 | break; | |
1842 | case KVM_MP_STATE_LOAD: | |
1843 | case KVM_MP_STATE_CHECK_STOP: | |
1844 | /* fall through - CHECK_STOP and LOAD are not supported yet */ | |
1845 | default: | |
1846 | rc = -ENXIO; | |
1847 | } | |
1848 | ||
1849 | return rc; | |
62d9f0db MT |
1850 | } |
1851 | ||
8ad35755 DH |
1852 | static bool ibs_enabled(struct kvm_vcpu *vcpu) |
1853 | { | |
1854 | return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS; | |
1855 | } | |
1856 | ||
2c70fe44 CB |
1857 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
1858 | { | |
8ad35755 | 1859 | retry: |
8e236546 | 1860 | kvm_s390_vcpu_request_handled(vcpu); |
586b7ccd CB |
1861 | if (!vcpu->requests) |
1862 | return 0; | |
2c70fe44 CB |
1863 | /* |
1864 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
1865 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
1866 | * This ensures that the ipte instruction for this request has | |
1867 | * already finished. We might race against a second unmapper that | |
1868 | * wants to set the blocking bit. Lets just retry the request loop. | |
1869 | */ | |
8ad35755 | 1870 | if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { |
2c70fe44 CB |
1871 | int rc; |
1872 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
fda902cb | 1873 | kvm_s390_get_prefix(vcpu), |
2c70fe44 CB |
1874 | PAGE_SIZE * 2); |
1875 | if (rc) | |
1876 | return rc; | |
8ad35755 | 1877 | goto retry; |
2c70fe44 | 1878 | } |
8ad35755 | 1879 | |
d3d692c8 DH |
1880 | if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) { |
1881 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
1882 | goto retry; | |
1883 | } | |
1884 | ||
8ad35755 DH |
1885 | if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) { |
1886 | if (!ibs_enabled(vcpu)) { | |
1887 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1); | |
805de8f4 | 1888 | atomic_or(CPUSTAT_IBS, |
8ad35755 DH |
1889 | &vcpu->arch.sie_block->cpuflags); |
1890 | } | |
1891 | goto retry; | |
2c70fe44 | 1892 | } |
8ad35755 DH |
1893 | |
1894 | if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) { | |
1895 | if (ibs_enabled(vcpu)) { | |
1896 | trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0); | |
805de8f4 | 1897 | atomic_andnot(CPUSTAT_IBS, |
8ad35755 DH |
1898 | &vcpu->arch.sie_block->cpuflags); |
1899 | } | |
1900 | goto retry; | |
1901 | } | |
1902 | ||
0759d068 DH |
1903 | /* nothing to do, just clear the request */ |
1904 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
1905 | ||
2c70fe44 CB |
1906 | return 0; |
1907 | } | |
1908 | ||
fa576c58 TH |
1909 | /** |
1910 | * kvm_arch_fault_in_page - fault-in guest page if necessary | |
1911 | * @vcpu: The corresponding virtual cpu | |
1912 | * @gpa: Guest physical address | |
1913 | * @writable: Whether the page should be writable or not | |
1914 | * | |
1915 | * Make sure that a guest page has been faulted-in on the host. | |
1916 | * | |
1917 | * Return: Zero on success, negative error code otherwise. | |
1918 | */ | |
1919 | long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable) | |
24eb3a82 | 1920 | { |
527e30b4 MS |
1921 | return gmap_fault(vcpu->arch.gmap, gpa, |
1922 | writable ? FAULT_FLAG_WRITE : 0); | |
24eb3a82 DD |
1923 | } |
1924 | ||
3c038e6b DD |
1925 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
1926 | unsigned long token) | |
1927 | { | |
1928 | struct kvm_s390_interrupt inti; | |
383d0b05 | 1929 | struct kvm_s390_irq irq; |
3c038e6b DD |
1930 | |
1931 | if (start_token) { | |
383d0b05 JF |
1932 | irq.u.ext.ext_params2 = token; |
1933 | irq.type = KVM_S390_INT_PFAULT_INIT; | |
1934 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &irq)); | |
3c038e6b DD |
1935 | } else { |
1936 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
383d0b05 | 1937 | inti.parm64 = token; |
3c038e6b DD |
1938 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); |
1939 | } | |
1940 | } | |
1941 | ||
1942 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
1943 | struct kvm_async_pf *work) | |
1944 | { | |
1945 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
1946 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
1947 | } | |
1948 | ||
1949 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
1950 | struct kvm_async_pf *work) | |
1951 | { | |
1952 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
1953 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
1954 | } | |
1955 | ||
1956 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
1957 | struct kvm_async_pf *work) | |
1958 | { | |
1959 | /* s390 will always inject the page directly */ | |
1960 | } | |
1961 | ||
1962 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
1963 | { | |
1964 | /* | |
1965 | * s390 will always inject the page directly, | |
1966 | * but we still want check_async_completion to cleanup | |
1967 | */ | |
1968 | return true; | |
1969 | } | |
1970 | ||
1971 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
1972 | { | |
1973 | hva_t hva; | |
1974 | struct kvm_arch_async_pf arch; | |
1975 | int rc; | |
1976 | ||
1977 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
1978 | return 0; | |
1979 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
1980 | vcpu->arch.pfault_compare) | |
1981 | return 0; | |
1982 | if (psw_extint_disabled(vcpu)) | |
1983 | return 0; | |
9a022067 | 1984 | if (kvm_s390_vcpu_has_irq(vcpu, 0)) |
3c038e6b DD |
1985 | return 0; |
1986 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
1987 | return 0; | |
1988 | if (!vcpu->arch.gmap->pfault_enabled) | |
1989 | return 0; | |
1990 | ||
81480cc1 HC |
1991 | hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr)); |
1992 | hva += current->thread.gmap_addr & ~PAGE_MASK; | |
1993 | if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8)) | |
3c038e6b DD |
1994 | return 0; |
1995 | ||
1996 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
1997 | return rc; | |
1998 | } | |
1999 | ||
3fb4c40f | 2000 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 2001 | { |
3fb4c40f | 2002 | int rc, cpuflags; |
e168bf8d | 2003 | |
3c038e6b DD |
2004 | /* |
2005 | * On s390 notifications for arriving pages will be delivered directly | |
2006 | * to the guest but the house keeping for completed pfaults is | |
2007 | * handled outside the worker. | |
2008 | */ | |
2009 | kvm_check_async_pf_completion(vcpu); | |
2010 | ||
5a32c1af | 2011 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
2012 | |
2013 | if (need_resched()) | |
2014 | schedule(); | |
2015 | ||
d3a73acb | 2016 | if (test_cpu_flag(CIF_MCCK_PENDING)) |
71cde587 CB |
2017 | s390_handle_mcck(); |
2018 | ||
79395031 JF |
2019 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
2020 | rc = kvm_s390_deliver_pending_interrupts(vcpu); | |
2021 | if (rc) | |
2022 | return rc; | |
2023 | } | |
0ff31867 | 2024 | |
2c70fe44 CB |
2025 | rc = kvm_s390_handle_requests(vcpu); |
2026 | if (rc) | |
2027 | return rc; | |
2028 | ||
27291e21 DH |
2029 | if (guestdbg_enabled(vcpu)) { |
2030 | kvm_s390_backup_guest_per_regs(vcpu); | |
2031 | kvm_s390_patch_guest_per_regs(vcpu); | |
2032 | } | |
2033 | ||
b0c632db | 2034 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
2035 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
2036 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
2037 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 2038 | |
3fb4c40f TH |
2039 | return 0; |
2040 | } | |
2041 | ||
492d8642 TH |
2042 | static int vcpu_post_run_fault_in_sie(struct kvm_vcpu *vcpu) |
2043 | { | |
2044 | psw_t *psw = &vcpu->arch.sie_block->gpsw; | |
2045 | u8 opcode; | |
2046 | int rc; | |
2047 | ||
2048 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
2049 | trace_kvm_s390_sie_fault(vcpu); | |
2050 | ||
2051 | /* | |
2052 | * We want to inject an addressing exception, which is defined as a | |
2053 | * suppressing or terminating exception. However, since we came here | |
2054 | * by a DAT access exception, the PSW still points to the faulting | |
2055 | * instruction since DAT exceptions are nullifying. So we've got | |
2056 | * to look up the current opcode to get the length of the instruction | |
2057 | * to be able to forward the PSW. | |
2058 | */ | |
8ae04b8f | 2059 | rc = read_guest(vcpu, psw->addr, 0, &opcode, 1); |
492d8642 TH |
2060 | if (rc) |
2061 | return kvm_s390_inject_prog_cond(vcpu, rc); | |
2062 | psw->addr = __rewind_psw(*psw, -insn_length(opcode)); | |
2063 | ||
2064 | return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
2065 | } | |
2066 | ||
3fb4c40f TH |
2067 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) |
2068 | { | |
24eb3a82 | 2069 | int rc = -1; |
2b29a9fd DD |
2070 | |
2071 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
2072 | vcpu->arch.sie_block->icptcode); | |
2073 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
2074 | ||
27291e21 DH |
2075 | if (guestdbg_enabled(vcpu)) |
2076 | kvm_s390_restore_guest_per_regs(vcpu); | |
2077 | ||
3fb4c40f | 2078 | if (exit_reason >= 0) { |
7c470539 | 2079 | rc = 0; |
210b1607 TH |
2080 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
2081 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
2082 | vcpu->run->s390_ucontrol.trans_exc_code = | |
2083 | current->thread.gmap_addr; | |
2084 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
2085 | rc = -EREMOTE; | |
24eb3a82 DD |
2086 | |
2087 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 2088 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 2089 | current->thread.gmap_pfault = 0; |
fa576c58 | 2090 | if (kvm_arch_setup_async_pf(vcpu)) { |
24eb3a82 | 2091 | rc = 0; |
fa576c58 TH |
2092 | } else { |
2093 | gpa_t gpa = current->thread.gmap_addr; | |
2094 | rc = kvm_arch_fault_in_page(vcpu, gpa, 1); | |
2095 | } | |
24eb3a82 DD |
2096 | } |
2097 | ||
492d8642 TH |
2098 | if (rc == -1) |
2099 | rc = vcpu_post_run_fault_in_sie(vcpu); | |
b0c632db | 2100 | |
5a32c1af | 2101 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 2102 | |
a76ccff6 TH |
2103 | if (rc == 0) { |
2104 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
2105 | /* Don't exit for host interrupts. */ |
2106 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
2107 | else |
2108 | rc = kvm_handle_sie_intercept(vcpu); | |
2109 | } | |
2110 | ||
3fb4c40f TH |
2111 | return rc; |
2112 | } | |
2113 | ||
2114 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
2115 | { | |
2116 | int rc, exit_reason; | |
2117 | ||
800c1065 TH |
2118 | /* |
2119 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
2120 | * ning the guest), so that memslots (and other stuff) are protected | |
2121 | */ | |
2122 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2123 | ||
a76ccff6 TH |
2124 | do { |
2125 | rc = vcpu_pre_run(vcpu); | |
2126 | if (rc) | |
2127 | break; | |
3fb4c40f | 2128 | |
800c1065 | 2129 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
2130 | /* |
2131 | * As PF_VCPU will be used in fault handler, between | |
2132 | * guest_enter and guest_exit should be no uaccess. | |
2133 | */ | |
0097d12e CB |
2134 | local_irq_disable(); |
2135 | __kvm_guest_enter(); | |
2136 | local_irq_enable(); | |
a76ccff6 TH |
2137 | exit_reason = sie64a(vcpu->arch.sie_block, |
2138 | vcpu->run->s.regs.gprs); | |
0097d12e CB |
2139 | local_irq_disable(); |
2140 | __kvm_guest_exit(); | |
2141 | local_irq_enable(); | |
800c1065 | 2142 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
2143 | |
2144 | rc = vcpu_post_run(vcpu, exit_reason); | |
27291e21 | 2145 | } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc); |
3fb4c40f | 2146 | |
800c1065 | 2147 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 2148 | return rc; |
b0c632db HC |
2149 | } |
2150 | ||
b028ee3e DH |
2151 | static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2152 | { | |
2153 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; | |
2154 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
2155 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) | |
2156 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
2157 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { | |
2158 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
d3d692c8 DH |
2159 | /* some control register changes require a tlb flush */ |
2160 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); | |
b028ee3e DH |
2161 | } |
2162 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_ARCH0) { | |
2163 | vcpu->arch.sie_block->cputm = kvm_run->s.regs.cputm; | |
2164 | vcpu->arch.sie_block->ckc = kvm_run->s.regs.ckc; | |
2165 | vcpu->arch.sie_block->todpr = kvm_run->s.regs.todpr; | |
2166 | vcpu->arch.sie_block->pp = kvm_run->s.regs.pp; | |
2167 | vcpu->arch.sie_block->gbea = kvm_run->s.regs.gbea; | |
2168 | } | |
2169 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PFAULT) { | |
2170 | vcpu->arch.pfault_token = kvm_run->s.regs.pft; | |
2171 | vcpu->arch.pfault_select = kvm_run->s.regs.pfs; | |
2172 | vcpu->arch.pfault_compare = kvm_run->s.regs.pfc; | |
9fbd8082 DH |
2173 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) |
2174 | kvm_clear_async_pf_completion_queue(vcpu); | |
b028ee3e DH |
2175 | } |
2176 | kvm_run->kvm_dirty_regs = 0; | |
2177 | } | |
2178 | ||
2179 | static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2180 | { | |
2181 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; | |
2182 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
2183 | kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu); | |
2184 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); | |
2185 | kvm_run->s.regs.cputm = vcpu->arch.sie_block->cputm; | |
2186 | kvm_run->s.regs.ckc = vcpu->arch.sie_block->ckc; | |
2187 | kvm_run->s.regs.todpr = vcpu->arch.sie_block->todpr; | |
2188 | kvm_run->s.regs.pp = vcpu->arch.sie_block->pp; | |
2189 | kvm_run->s.regs.gbea = vcpu->arch.sie_block->gbea; | |
2190 | kvm_run->s.regs.pft = vcpu->arch.pfault_token; | |
2191 | kvm_run->s.regs.pfs = vcpu->arch.pfault_select; | |
2192 | kvm_run->s.regs.pfc = vcpu->arch.pfault_compare; | |
2193 | } | |
2194 | ||
b0c632db HC |
2195 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2196 | { | |
8f2abe6a | 2197 | int rc; |
b0c632db HC |
2198 | sigset_t sigsaved; |
2199 | ||
27291e21 DH |
2200 | if (guestdbg_exit_pending(vcpu)) { |
2201 | kvm_s390_prepare_debug_exit(vcpu); | |
2202 | return 0; | |
2203 | } | |
2204 | ||
b0c632db HC |
2205 | if (vcpu->sigset_active) |
2206 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2207 | ||
6352e4d2 DH |
2208 | if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm)) { |
2209 | kvm_s390_vcpu_start(vcpu); | |
2210 | } else if (is_vcpu_stopped(vcpu)) { | |
ea2cdd27 | 2211 | pr_err_ratelimited("can't run stopped vcpu %d\n", |
6352e4d2 DH |
2212 | vcpu->vcpu_id); |
2213 | return -EINVAL; | |
2214 | } | |
b0c632db | 2215 | |
b028ee3e | 2216 | sync_regs(vcpu, kvm_run); |
d7b0b5eb | 2217 | |
dab4079d | 2218 | might_fault(); |
a76ccff6 | 2219 | rc = __vcpu_run(vcpu); |
9ace903d | 2220 | |
b1d16c49 CE |
2221 | if (signal_pending(current) && !rc) { |
2222 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 2223 | rc = -EINTR; |
b1d16c49 | 2224 | } |
8f2abe6a | 2225 | |
27291e21 DH |
2226 | if (guestdbg_exit_pending(vcpu) && !rc) { |
2227 | kvm_s390_prepare_debug_exit(vcpu); | |
2228 | rc = 0; | |
2229 | } | |
2230 | ||
b8e660b8 | 2231 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
2232 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
2233 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
2234 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
2235 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
2236 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
2237 | rc = 0; | |
2238 | } | |
2239 | ||
2240 | if (rc == -EREMOTE) { | |
2241 | /* intercept was handled, but userspace support is needed | |
2242 | * kvm_run has been prepared by the handler */ | |
2243 | rc = 0; | |
2244 | } | |
b0c632db | 2245 | |
b028ee3e | 2246 | store_regs(vcpu, kvm_run); |
d7b0b5eb | 2247 | |
b0c632db HC |
2248 | if (vcpu->sigset_active) |
2249 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2250 | ||
b0c632db | 2251 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 2252 | return rc; |
b0c632db HC |
2253 | } |
2254 | ||
b0c632db HC |
2255 | /* |
2256 | * store status at address | |
2257 | * we use have two special cases: | |
2258 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
2259 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
2260 | */ | |
d0bce605 | 2261 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa) |
b0c632db | 2262 | { |
092670cd | 2263 | unsigned char archmode = 1; |
fda902cb | 2264 | unsigned int px; |
178bd789 | 2265 | u64 clkcomp; |
d0bce605 | 2266 | int rc; |
b0c632db | 2267 | |
d0bce605 HC |
2268 | if (gpa == KVM_S390_STORE_STATUS_NOADDR) { |
2269 | if (write_guest_abs(vcpu, 163, &archmode, 1)) | |
b0c632db | 2270 | return -EFAULT; |
d0bce605 HC |
2271 | gpa = SAVE_AREA_BASE; |
2272 | } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) { | |
2273 | if (write_guest_real(vcpu, 163, &archmode, 1)) | |
b0c632db | 2274 | return -EFAULT; |
d0bce605 HC |
2275 | gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE); |
2276 | } | |
2277 | rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs), | |
2278 | vcpu->arch.guest_fpregs.fprs, 128); | |
2279 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs), | |
2280 | vcpu->run->s.regs.gprs, 128); | |
2281 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw), | |
2282 | &vcpu->arch.sie_block->gpsw, 16); | |
fda902cb | 2283 | px = kvm_s390_get_prefix(vcpu); |
d0bce605 | 2284 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg), |
fda902cb | 2285 | &px, 4); |
d0bce605 HC |
2286 | rc |= write_guest_abs(vcpu, |
2287 | gpa + offsetof(struct save_area, fp_ctrl_reg), | |
2288 | &vcpu->arch.guest_fpregs.fpc, 4); | |
2289 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg), | |
2290 | &vcpu->arch.sie_block->todpr, 4); | |
2291 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer), | |
2292 | &vcpu->arch.sie_block->cputm, 8); | |
178bd789 | 2293 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
d0bce605 HC |
2294 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp), |
2295 | &clkcomp, 8); | |
2296 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs), | |
2297 | &vcpu->run->s.regs.acrs, 64); | |
2298 | rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs), | |
2299 | &vcpu->arch.sie_block->gcr, 128); | |
2300 | return rc ? -EFAULT : 0; | |
b0c632db HC |
2301 | } |
2302 | ||
e879892c TH |
2303 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
2304 | { | |
2305 | /* | |
2306 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
2307 | * copying in vcpu load/put. Lets update our copies before we save | |
2308 | * it into the save area | |
2309 | */ | |
d0164ee2 | 2310 | save_fpu_regs(); |
9977e886 HB |
2311 | if (test_kvm_facility(vcpu->kvm, 129)) { |
2312 | /* | |
2313 | * If the vector extension is available, the vector registers | |
2314 | * which overlaps with floating-point registers are saved in | |
2315 | * the SIE-control block. Hence, extract the floating-point | |
2316 | * registers and the FPC value and store them in the | |
2317 | * guest_fpregs structure. | |
2318 | */ | |
2319 | WARN_ON(!is_vx_task(current)); /* XXX remove later */ | |
2320 | vcpu->arch.guest_fpregs.fpc = current->thread.fpu.fpc; | |
2321 | convert_vx_to_fp(vcpu->arch.guest_fpregs.fprs, | |
2322 | current->thread.fpu.vxrs); | |
2323 | } else | |
2324 | save_fpu_to(&vcpu->arch.guest_fpregs); | |
e879892c TH |
2325 | save_access_regs(vcpu->run->s.regs.acrs); |
2326 | ||
2327 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
2328 | } | |
2329 | ||
bc17de7c EF |
2330 | /* |
2331 | * store additional status at address | |
2332 | */ | |
2333 | int kvm_s390_store_adtl_status_unloaded(struct kvm_vcpu *vcpu, | |
2334 | unsigned long gpa) | |
2335 | { | |
2336 | /* Only bits 0-53 are used for address formation */ | |
2337 | if (!(gpa & ~0x3ff)) | |
2338 | return 0; | |
2339 | ||
2340 | return write_guest_abs(vcpu, gpa & ~0x3ff, | |
2341 | (void *)&vcpu->run->s.regs.vrs, 512); | |
2342 | } | |
2343 | ||
2344 | int kvm_s390_vcpu_store_adtl_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
2345 | { | |
2346 | if (!test_kvm_facility(vcpu->kvm, 129)) | |
2347 | return 0; | |
2348 | ||
2349 | /* | |
2350 | * The guest VXRS are in the host VXRs due to the lazy | |
9977e886 HB |
2351 | * copying in vcpu load/put. We can simply call save_fpu_regs() |
2352 | * to save the current register state because we are in the | |
2353 | * middle of a load/put cycle. | |
2354 | * | |
2355 | * Let's update our copies before we save it into the save area. | |
bc17de7c | 2356 | */ |
d0164ee2 | 2357 | save_fpu_regs(); |
bc17de7c EF |
2358 | |
2359 | return kvm_s390_store_adtl_status_unloaded(vcpu, addr); | |
2360 | } | |
2361 | ||
8ad35755 DH |
2362 | static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu) |
2363 | { | |
2364 | kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu); | |
8e236546 | 2365 | kvm_s390_sync_request(KVM_REQ_DISABLE_IBS, vcpu); |
8ad35755 DH |
2366 | } |
2367 | ||
2368 | static void __disable_ibs_on_all_vcpus(struct kvm *kvm) | |
2369 | { | |
2370 | unsigned int i; | |
2371 | struct kvm_vcpu *vcpu; | |
2372 | ||
2373 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
2374 | __disable_ibs_on_vcpu(vcpu); | |
2375 | } | |
2376 | } | |
2377 | ||
2378 | static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu) | |
2379 | { | |
2380 | kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu); | |
8e236546 | 2381 | kvm_s390_sync_request(KVM_REQ_ENABLE_IBS, vcpu); |
8ad35755 DH |
2382 | } |
2383 | ||
6852d7b6 DH |
2384 | void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu) |
2385 | { | |
8ad35755 DH |
2386 | int i, online_vcpus, started_vcpus = 0; |
2387 | ||
2388 | if (!is_vcpu_stopped(vcpu)) | |
2389 | return; | |
2390 | ||
6852d7b6 | 2391 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1); |
8ad35755 | 2392 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2393 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2394 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2395 | ||
2396 | for (i = 0; i < online_vcpus; i++) { | |
2397 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) | |
2398 | started_vcpus++; | |
2399 | } | |
2400 | ||
2401 | if (started_vcpus == 0) { | |
2402 | /* we're the only active VCPU -> speed it up */ | |
2403 | __enable_ibs_on_vcpu(vcpu); | |
2404 | } else if (started_vcpus == 1) { | |
2405 | /* | |
2406 | * As we are starting a second VCPU, we have to disable | |
2407 | * the IBS facility on all VCPUs to remove potentially | |
2408 | * oustanding ENABLE requests. | |
2409 | */ | |
2410 | __disable_ibs_on_all_vcpus(vcpu->kvm); | |
2411 | } | |
2412 | ||
805de8f4 | 2413 | atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2414 | /* |
2415 | * Another VCPU might have used IBS while we were offline. | |
2416 | * Let's play safe and flush the VCPU at startup. | |
2417 | */ | |
d3d692c8 | 2418 | kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); |
433b9ee4 | 2419 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2420 | return; |
6852d7b6 DH |
2421 | } |
2422 | ||
2423 | void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu) | |
2424 | { | |
8ad35755 DH |
2425 | int i, online_vcpus, started_vcpus = 0; |
2426 | struct kvm_vcpu *started_vcpu = NULL; | |
2427 | ||
2428 | if (is_vcpu_stopped(vcpu)) | |
2429 | return; | |
2430 | ||
6852d7b6 | 2431 | trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0); |
8ad35755 | 2432 | /* Only one cpu at a time may enter/leave the STOPPED state. */ |
433b9ee4 | 2433 | spin_lock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 DH |
2434 | online_vcpus = atomic_read(&vcpu->kvm->online_vcpus); |
2435 | ||
32f5ff63 | 2436 | /* SIGP STOP and SIGP STOP AND STORE STATUS has been fully processed */ |
6cddd432 | 2437 | kvm_s390_clear_stop_irq(vcpu); |
32f5ff63 | 2438 | |
805de8f4 | 2439 | atomic_or(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
8ad35755 DH |
2440 | __disable_ibs_on_vcpu(vcpu); |
2441 | ||
2442 | for (i = 0; i < online_vcpus; i++) { | |
2443 | if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) { | |
2444 | started_vcpus++; | |
2445 | started_vcpu = vcpu->kvm->vcpus[i]; | |
2446 | } | |
2447 | } | |
2448 | ||
2449 | if (started_vcpus == 1) { | |
2450 | /* | |
2451 | * As we only have one VCPU left, we want to enable the | |
2452 | * IBS facility for that VCPU to speed it up. | |
2453 | */ | |
2454 | __enable_ibs_on_vcpu(started_vcpu); | |
2455 | } | |
2456 | ||
433b9ee4 | 2457 | spin_unlock(&vcpu->kvm->arch.start_stop_lock); |
8ad35755 | 2458 | return; |
6852d7b6 DH |
2459 | } |
2460 | ||
d6712df9 CH |
2461 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
2462 | struct kvm_enable_cap *cap) | |
2463 | { | |
2464 | int r; | |
2465 | ||
2466 | if (cap->flags) | |
2467 | return -EINVAL; | |
2468 | ||
2469 | switch (cap->cap) { | |
fa6b7fe9 CH |
2470 | case KVM_CAP_S390_CSS_SUPPORT: |
2471 | if (!vcpu->kvm->arch.css_support) { | |
2472 | vcpu->kvm->arch.css_support = 1; | |
c92ea7b9 | 2473 | VM_EVENT(vcpu->kvm, 3, "%s", "ENABLE: CSS support"); |
fa6b7fe9 CH |
2474 | trace_kvm_s390_enable_css(vcpu->kvm); |
2475 | } | |
2476 | r = 0; | |
2477 | break; | |
d6712df9 CH |
2478 | default: |
2479 | r = -EINVAL; | |
2480 | break; | |
2481 | } | |
2482 | return r; | |
2483 | } | |
2484 | ||
41408c28 TH |
2485 | static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu, |
2486 | struct kvm_s390_mem_op *mop) | |
2487 | { | |
2488 | void __user *uaddr = (void __user *)mop->buf; | |
2489 | void *tmpbuf = NULL; | |
2490 | int r, srcu_idx; | |
2491 | const u64 supported_flags = KVM_S390_MEMOP_F_INJECT_EXCEPTION | |
2492 | | KVM_S390_MEMOP_F_CHECK_ONLY; | |
2493 | ||
2494 | if (mop->flags & ~supported_flags) | |
2495 | return -EINVAL; | |
2496 | ||
2497 | if (mop->size > MEM_OP_MAX_SIZE) | |
2498 | return -E2BIG; | |
2499 | ||
2500 | if (!(mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY)) { | |
2501 | tmpbuf = vmalloc(mop->size); | |
2502 | if (!tmpbuf) | |
2503 | return -ENOMEM; | |
2504 | } | |
2505 | ||
2506 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2507 | ||
2508 | switch (mop->op) { | |
2509 | case KVM_S390_MEMOP_LOGICAL_READ: | |
2510 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
2511 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, false); | |
2512 | break; | |
2513 | } | |
2514 | r = read_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2515 | if (r == 0) { | |
2516 | if (copy_to_user(uaddr, tmpbuf, mop->size)) | |
2517 | r = -EFAULT; | |
2518 | } | |
2519 | break; | |
2520 | case KVM_S390_MEMOP_LOGICAL_WRITE: | |
2521 | if (mop->flags & KVM_S390_MEMOP_F_CHECK_ONLY) { | |
2522 | r = check_gva_range(vcpu, mop->gaddr, mop->ar, mop->size, true); | |
2523 | break; | |
2524 | } | |
2525 | if (copy_from_user(tmpbuf, uaddr, mop->size)) { | |
2526 | r = -EFAULT; | |
2527 | break; | |
2528 | } | |
2529 | r = write_guest(vcpu, mop->gaddr, mop->ar, tmpbuf, mop->size); | |
2530 | break; | |
2531 | default: | |
2532 | r = -EINVAL; | |
2533 | } | |
2534 | ||
2535 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
2536 | ||
2537 | if (r > 0 && (mop->flags & KVM_S390_MEMOP_F_INJECT_EXCEPTION) != 0) | |
2538 | kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm); | |
2539 | ||
2540 | vfree(tmpbuf); | |
2541 | return r; | |
2542 | } | |
2543 | ||
b0c632db HC |
2544 | long kvm_arch_vcpu_ioctl(struct file *filp, |
2545 | unsigned int ioctl, unsigned long arg) | |
2546 | { | |
2547 | struct kvm_vcpu *vcpu = filp->private_data; | |
2548 | void __user *argp = (void __user *)arg; | |
800c1065 | 2549 | int idx; |
bc923cc9 | 2550 | long r; |
b0c632db | 2551 | |
93736624 | 2552 | switch (ioctl) { |
47b43c52 JF |
2553 | case KVM_S390_IRQ: { |
2554 | struct kvm_s390_irq s390irq; | |
2555 | ||
2556 | r = -EFAULT; | |
2557 | if (copy_from_user(&s390irq, argp, sizeof(s390irq))) | |
2558 | break; | |
2559 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
2560 | break; | |
2561 | } | |
93736624 | 2562 | case KVM_S390_INTERRUPT: { |
ba5c1e9b | 2563 | struct kvm_s390_interrupt s390int; |
383d0b05 | 2564 | struct kvm_s390_irq s390irq; |
ba5c1e9b | 2565 | |
93736624 | 2566 | r = -EFAULT; |
ba5c1e9b | 2567 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 | 2568 | break; |
383d0b05 JF |
2569 | if (s390int_to_s390irq(&s390int, &s390irq)) |
2570 | return -EINVAL; | |
2571 | r = kvm_s390_inject_vcpu(vcpu, &s390irq); | |
93736624 | 2572 | break; |
ba5c1e9b | 2573 | } |
b0c632db | 2574 | case KVM_S390_STORE_STATUS: |
800c1065 | 2575 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 2576 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 2577 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 2578 | break; |
b0c632db HC |
2579 | case KVM_S390_SET_INITIAL_PSW: { |
2580 | psw_t psw; | |
2581 | ||
bc923cc9 | 2582 | r = -EFAULT; |
b0c632db | 2583 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
2584 | break; |
2585 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
2586 | break; | |
b0c632db HC |
2587 | } |
2588 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
2589 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
2590 | break; | |
14eebd91 CO |
2591 | case KVM_SET_ONE_REG: |
2592 | case KVM_GET_ONE_REG: { | |
2593 | struct kvm_one_reg reg; | |
2594 | r = -EFAULT; | |
2595 | if (copy_from_user(®, argp, sizeof(reg))) | |
2596 | break; | |
2597 | if (ioctl == KVM_SET_ONE_REG) | |
2598 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
2599 | else | |
2600 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
2601 | break; | |
2602 | } | |
27e0393f CO |
2603 | #ifdef CONFIG_KVM_S390_UCONTROL |
2604 | case KVM_S390_UCAS_MAP: { | |
2605 | struct kvm_s390_ucas_mapping ucasmap; | |
2606 | ||
2607 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2608 | r = -EFAULT; | |
2609 | break; | |
2610 | } | |
2611 | ||
2612 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2613 | r = -EINVAL; | |
2614 | break; | |
2615 | } | |
2616 | ||
2617 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
2618 | ucasmap.vcpu_addr, ucasmap.length); | |
2619 | break; | |
2620 | } | |
2621 | case KVM_S390_UCAS_UNMAP: { | |
2622 | struct kvm_s390_ucas_mapping ucasmap; | |
2623 | ||
2624 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
2625 | r = -EFAULT; | |
2626 | break; | |
2627 | } | |
2628 | ||
2629 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
2630 | r = -EINVAL; | |
2631 | break; | |
2632 | } | |
2633 | ||
2634 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
2635 | ucasmap.length); | |
2636 | break; | |
2637 | } | |
2638 | #endif | |
ccc7910f | 2639 | case KVM_S390_VCPU_FAULT: { |
527e30b4 | 2640 | r = gmap_fault(vcpu->arch.gmap, arg, 0); |
ccc7910f CO |
2641 | break; |
2642 | } | |
d6712df9 CH |
2643 | case KVM_ENABLE_CAP: |
2644 | { | |
2645 | struct kvm_enable_cap cap; | |
2646 | r = -EFAULT; | |
2647 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
2648 | break; | |
2649 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
2650 | break; | |
2651 | } | |
41408c28 TH |
2652 | case KVM_S390_MEM_OP: { |
2653 | struct kvm_s390_mem_op mem_op; | |
2654 | ||
2655 | if (copy_from_user(&mem_op, argp, sizeof(mem_op)) == 0) | |
2656 | r = kvm_s390_guest_mem_op(vcpu, &mem_op); | |
2657 | else | |
2658 | r = -EFAULT; | |
2659 | break; | |
2660 | } | |
816c7667 JF |
2661 | case KVM_S390_SET_IRQ_STATE: { |
2662 | struct kvm_s390_irq_state irq_state; | |
2663 | ||
2664 | r = -EFAULT; | |
2665 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2666 | break; | |
2667 | if (irq_state.len > VCPU_IRQS_MAX_BUF || | |
2668 | irq_state.len == 0 || | |
2669 | irq_state.len % sizeof(struct kvm_s390_irq) > 0) { | |
2670 | r = -EINVAL; | |
2671 | break; | |
2672 | } | |
2673 | r = kvm_s390_set_irq_state(vcpu, | |
2674 | (void __user *) irq_state.buf, | |
2675 | irq_state.len); | |
2676 | break; | |
2677 | } | |
2678 | case KVM_S390_GET_IRQ_STATE: { | |
2679 | struct kvm_s390_irq_state irq_state; | |
2680 | ||
2681 | r = -EFAULT; | |
2682 | if (copy_from_user(&irq_state, argp, sizeof(irq_state))) | |
2683 | break; | |
2684 | if (irq_state.len == 0) { | |
2685 | r = -EINVAL; | |
2686 | break; | |
2687 | } | |
2688 | r = kvm_s390_get_irq_state(vcpu, | |
2689 | (__u8 __user *) irq_state.buf, | |
2690 | irq_state.len); | |
2691 | break; | |
2692 | } | |
b0c632db | 2693 | default: |
3e6afcf1 | 2694 | r = -ENOTTY; |
b0c632db | 2695 | } |
bc923cc9 | 2696 | return r; |
b0c632db HC |
2697 | } |
2698 | ||
5b1c1493 CO |
2699 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
2700 | { | |
2701 | #ifdef CONFIG_KVM_S390_UCONTROL | |
2702 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
2703 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
2704 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
2705 | get_page(vmf->page); | |
2706 | return 0; | |
2707 | } | |
2708 | #endif | |
2709 | return VM_FAULT_SIGBUS; | |
2710 | } | |
2711 | ||
5587027c AK |
2712 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
2713 | unsigned long npages) | |
db3fe4eb TY |
2714 | { |
2715 | return 0; | |
2716 | } | |
2717 | ||
b0c632db | 2718 | /* Section: memory related */ |
f7784b8e MT |
2719 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
2720 | struct kvm_memory_slot *memslot, | |
09170a49 | 2721 | const struct kvm_userspace_memory_region *mem, |
7b6195a9 | 2722 | enum kvm_mr_change change) |
b0c632db | 2723 | { |
dd2887e7 NW |
2724 | /* A few sanity checks. We can have memory slots which have to be |
2725 | located/ended at a segment boundary (1MB). The memory in userland is | |
2726 | ok to be fragmented into various different vmas. It is okay to mmap() | |
2727 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 2728 | |
598841ca | 2729 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
2730 | return -EINVAL; |
2731 | ||
598841ca | 2732 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
2733 | return -EINVAL; |
2734 | ||
f7784b8e MT |
2735 | return 0; |
2736 | } | |
2737 | ||
2738 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
09170a49 | 2739 | const struct kvm_userspace_memory_region *mem, |
8482644a | 2740 | const struct kvm_memory_slot *old, |
f36f3f28 | 2741 | const struct kvm_memory_slot *new, |
8482644a | 2742 | enum kvm_mr_change change) |
f7784b8e | 2743 | { |
f7850c92 | 2744 | int rc; |
f7784b8e | 2745 | |
2cef4deb CB |
2746 | /* If the basics of the memslot do not change, we do not want |
2747 | * to update the gmap. Every update causes several unnecessary | |
2748 | * segment translation exceptions. This is usually handled just | |
2749 | * fine by the normal fault handler + gmap, but it will also | |
2750 | * cause faults on the prefix page of running guest CPUs. | |
2751 | */ | |
2752 | if (old->userspace_addr == mem->userspace_addr && | |
2753 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
2754 | old->npages * PAGE_SIZE == mem->memory_size) | |
2755 | return; | |
598841ca CO |
2756 | |
2757 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
2758 | mem->guest_phys_addr, mem->memory_size); | |
2759 | if (rc) | |
ea2cdd27 | 2760 | pr_warn("failed to commit memory region\n"); |
598841ca | 2761 | return; |
b0c632db HC |
2762 | } |
2763 | ||
b0c632db HC |
2764 | static int __init kvm_s390_init(void) |
2765 | { | |
9d8d5786 | 2766 | return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
b0c632db HC |
2767 | } |
2768 | ||
2769 | static void __exit kvm_s390_exit(void) | |
2770 | { | |
2771 | kvm_exit(); | |
2772 | } | |
2773 | ||
2774 | module_init(kvm_s390_init); | |
2775 | module_exit(kvm_s390_exit); | |
566af940 CH |
2776 | |
2777 | /* | |
2778 | * Enable autoloading of the kvm module. | |
2779 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
2780 | * since x86 takes a different approach. | |
2781 | */ | |
2782 | #include <linux/miscdevice.h> | |
2783 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
2784 | MODULE_ALIAS("devname:kvm"); |