Commit | Line | Data |
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b0c632db HC |
1 | /* |
2 | * s390host.c -- hosting zSeries kernel virtual machines | |
3 | * | |
628eb9b8 | 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> |
b0c632db HC |
14 | */ |
15 | ||
16 | #include <linux/compiler.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/fs.h> | |
ca872302 | 19 | #include <linux/hrtimer.h> |
b0c632db HC |
20 | #include <linux/init.h> |
21 | #include <linux/kvm.h> | |
22 | #include <linux/kvm_host.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/slab.h> | |
ba5c1e9b | 25 | #include <linux/timer.h> |
cbb870c8 | 26 | #include <asm/asm-offsets.h> |
b0c632db HC |
27 | #include <asm/lowcore.h> |
28 | #include <asm/pgtable.h> | |
f5daba1d | 29 | #include <asm/nmi.h> |
a0616cde | 30 | #include <asm/switch_to.h> |
1526bf9c | 31 | #include <asm/sclp.h> |
8f2abe6a | 32 | #include "kvm-s390.h" |
b0c632db HC |
33 | #include "gaccess.h" |
34 | ||
35 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
36 | ||
37 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
38 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 39 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
40 | { "exit_validity", VCPU_STAT(exit_validity) }, |
41 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
42 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
43 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
44 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
45 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
46 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f5e10b09 | 47 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b CO |
48 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
49 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, | |
7697e71f | 50 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
51 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
52 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
53 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
54 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
55 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
56 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
57 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
453423dc CB |
58 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
59 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
60 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
61 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
62 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
63 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
64 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
65 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
66 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 67 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 68 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 69 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 70 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
71 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
72 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
73 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
74 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
75 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 76 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 77 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 78 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
79 | { NULL } |
80 | }; | |
81 | ||
ef50f7ac | 82 | static unsigned long long *facilities; |
b0c632db HC |
83 | |
84 | /* Section: not file related */ | |
10474ae8 | 85 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
86 | { |
87 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 88 | return 0; |
b0c632db HC |
89 | } |
90 | ||
91 | void kvm_arch_hardware_disable(void *garbage) | |
92 | { | |
93 | } | |
94 | ||
b0c632db HC |
95 | int kvm_arch_hardware_setup(void) |
96 | { | |
97 | return 0; | |
98 | } | |
99 | ||
100 | void kvm_arch_hardware_unsetup(void) | |
101 | { | |
102 | } | |
103 | ||
104 | void kvm_arch_check_processor_compat(void *rtn) | |
105 | { | |
106 | } | |
107 | ||
108 | int kvm_arch_init(void *opaque) | |
109 | { | |
110 | return 0; | |
111 | } | |
112 | ||
113 | void kvm_arch_exit(void) | |
114 | { | |
115 | } | |
116 | ||
117 | /* Section: device related */ | |
118 | long kvm_arch_dev_ioctl(struct file *filp, | |
119 | unsigned int ioctl, unsigned long arg) | |
120 | { | |
121 | if (ioctl == KVM_S390_ENABLE_SIE) | |
122 | return s390_enable_sie(); | |
123 | return -EINVAL; | |
124 | } | |
125 | ||
126 | int kvm_dev_ioctl_check_extension(long ext) | |
127 | { | |
d7b0b5eb CO |
128 | int r; |
129 | ||
2bd0ac4e | 130 | switch (ext) { |
d7b0b5eb | 131 | case KVM_CAP_S390_PSW: |
b6cf8788 | 132 | case KVM_CAP_S390_GMAP: |
52e16b18 | 133 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
134 | #ifdef CONFIG_KVM_S390_UCONTROL |
135 | case KVM_CAP_S390_UCONTROL: | |
136 | #endif | |
60b413c9 | 137 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 138 | case KVM_CAP_ONE_REG: |
d7b0b5eb CO |
139 | r = 1; |
140 | break; | |
e726b1bd CB |
141 | case KVM_CAP_NR_VCPUS: |
142 | case KVM_CAP_MAX_VCPUS: | |
143 | r = KVM_MAX_VCPUS; | |
144 | break; | |
1526bf9c CB |
145 | case KVM_CAP_S390_COW: |
146 | r = sclp_get_fac85() & 0x2; | |
147 | break; | |
2bd0ac4e | 148 | default: |
d7b0b5eb | 149 | r = 0; |
2bd0ac4e | 150 | } |
d7b0b5eb | 151 | return r; |
b0c632db HC |
152 | } |
153 | ||
154 | /* Section: vm related */ | |
155 | /* | |
156 | * Get (and clear) the dirty memory log for a memory slot. | |
157 | */ | |
158 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
159 | struct kvm_dirty_log *log) | |
160 | { | |
161 | return 0; | |
162 | } | |
163 | ||
164 | long kvm_arch_vm_ioctl(struct file *filp, | |
165 | unsigned int ioctl, unsigned long arg) | |
166 | { | |
167 | struct kvm *kvm = filp->private_data; | |
168 | void __user *argp = (void __user *)arg; | |
169 | int r; | |
170 | ||
171 | switch (ioctl) { | |
ba5c1e9b CO |
172 | case KVM_S390_INTERRUPT: { |
173 | struct kvm_s390_interrupt s390int; | |
174 | ||
175 | r = -EFAULT; | |
176 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
177 | break; | |
178 | r = kvm_s390_inject_vm(kvm, &s390int); | |
179 | break; | |
180 | } | |
b0c632db | 181 | default: |
367e1319 | 182 | r = -ENOTTY; |
b0c632db HC |
183 | } |
184 | ||
185 | return r; | |
186 | } | |
187 | ||
e08b9637 | 188 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 189 | { |
b0c632db HC |
190 | int rc; |
191 | char debug_name[16]; | |
192 | ||
e08b9637 CO |
193 | rc = -EINVAL; |
194 | #ifdef CONFIG_KVM_S390_UCONTROL | |
195 | if (type & ~KVM_VM_S390_UCONTROL) | |
196 | goto out_err; | |
197 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
198 | goto out_err; | |
199 | #else | |
200 | if (type) | |
201 | goto out_err; | |
202 | #endif | |
203 | ||
b0c632db HC |
204 | rc = s390_enable_sie(); |
205 | if (rc) | |
d89f5eff | 206 | goto out_err; |
b0c632db | 207 | |
b290411a CO |
208 | rc = -ENOMEM; |
209 | ||
b0c632db HC |
210 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
211 | if (!kvm->arch.sca) | |
d89f5eff | 212 | goto out_err; |
b0c632db HC |
213 | |
214 | sprintf(debug_name, "kvm-%u", current->pid); | |
215 | ||
216 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
217 | if (!kvm->arch.dbf) | |
218 | goto out_nodbf; | |
219 | ||
ba5c1e9b CO |
220 | spin_lock_init(&kvm->arch.float_int.lock); |
221 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
222 | ||
b0c632db HC |
223 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
224 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
225 | ||
e08b9637 CO |
226 | if (type & KVM_VM_S390_UCONTROL) { |
227 | kvm->arch.gmap = NULL; | |
228 | } else { | |
229 | kvm->arch.gmap = gmap_alloc(current->mm); | |
230 | if (!kvm->arch.gmap) | |
231 | goto out_nogmap; | |
232 | } | |
d89f5eff | 233 | return 0; |
598841ca CO |
234 | out_nogmap: |
235 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
236 | out_nodbf: |
237 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
238 | out_err: |
239 | return rc; | |
b0c632db HC |
240 | } |
241 | ||
d329c035 CB |
242 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
243 | { | |
244 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
58f9460b CO |
245 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
246 | clear_bit(63 - vcpu->vcpu_id, | |
247 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
248 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
249 | (__u64) vcpu->arch.sie_block) | |
250 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
251 | } | |
abf4a71e | 252 | smp_mb(); |
27e0393f CO |
253 | |
254 | if (kvm_is_ucontrol(vcpu->kvm)) | |
255 | gmap_free(vcpu->arch.gmap); | |
256 | ||
d329c035 | 257 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 258 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
259 | kfree(vcpu); |
260 | } | |
261 | ||
262 | static void kvm_free_vcpus(struct kvm *kvm) | |
263 | { | |
264 | unsigned int i; | |
988a2cae | 265 | struct kvm_vcpu *vcpu; |
d329c035 | 266 | |
988a2cae GN |
267 | kvm_for_each_vcpu(i, vcpu, kvm) |
268 | kvm_arch_vcpu_destroy(vcpu); | |
269 | ||
270 | mutex_lock(&kvm->lock); | |
271 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
272 | kvm->vcpus[i] = NULL; | |
273 | ||
274 | atomic_set(&kvm->online_vcpus, 0); | |
275 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
276 | } |
277 | ||
ad8ba2cd SY |
278 | void kvm_arch_sync_events(struct kvm *kvm) |
279 | { | |
280 | } | |
281 | ||
b0c632db HC |
282 | void kvm_arch_destroy_vm(struct kvm *kvm) |
283 | { | |
d329c035 | 284 | kvm_free_vcpus(kvm); |
b0c632db | 285 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 286 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
287 | if (!kvm_is_ucontrol(kvm)) |
288 | gmap_free(kvm->arch.gmap); | |
b0c632db HC |
289 | } |
290 | ||
291 | /* Section: vcpu related */ | |
292 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
293 | { | |
27e0393f CO |
294 | if (kvm_is_ucontrol(vcpu->kvm)) { |
295 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
296 | if (!vcpu->arch.gmap) | |
297 | return -ENOMEM; | |
298 | return 0; | |
299 | } | |
300 | ||
598841ca | 301 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
302 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
303 | KVM_SYNC_GPRS | | |
9eed0735 CB |
304 | KVM_SYNC_ACRS | |
305 | KVM_SYNC_CRS; | |
b0c632db HC |
306 | return 0; |
307 | } | |
308 | ||
309 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
310 | { | |
6692cef3 | 311 | /* Nothing todo */ |
b0c632db HC |
312 | } |
313 | ||
314 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
315 | { | |
316 | save_fp_regs(&vcpu->arch.host_fpregs); | |
317 | save_access_regs(vcpu->arch.host_acrs); | |
318 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
319 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
59674c1a | 320 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 321 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 322 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
323 | } |
324 | ||
325 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
326 | { | |
9e6dabef | 327 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 328 | gmap_disable(vcpu->arch.gmap); |
b0c632db | 329 | save_fp_regs(&vcpu->arch.guest_fpregs); |
59674c1a | 330 | save_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
331 | restore_fp_regs(&vcpu->arch.host_fpregs); |
332 | restore_access_regs(vcpu->arch.host_acrs); | |
333 | } | |
334 | ||
335 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
336 | { | |
337 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
338 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
339 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 340 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
341 | vcpu->arch.sie_block->cputm = 0UL; |
342 | vcpu->arch.sie_block->ckc = 0UL; | |
343 | vcpu->arch.sie_block->todpr = 0; | |
344 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
345 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
346 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
347 | vcpu->arch.guest_fpregs.fpc = 0; | |
348 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
349 | vcpu->arch.sie_block->gbea = 1; | |
350 | } | |
351 | ||
352 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
353 | { | |
9e6dabef CH |
354 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
355 | CPUSTAT_SM | | |
356 | CPUSTAT_STOPPED); | |
fc34531d | 357 | vcpu->arch.sie_block->ecb = 6; |
b0c632db | 358 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 359 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
360 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
361 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
362 | (unsigned long) vcpu); | |
363 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 364 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 365 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
366 | return 0; |
367 | } | |
368 | ||
369 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
370 | unsigned int id) | |
371 | { | |
4d47555a CO |
372 | struct kvm_vcpu *vcpu; |
373 | int rc = -EINVAL; | |
374 | ||
375 | if (id >= KVM_MAX_VCPUS) | |
376 | goto out; | |
377 | ||
378 | rc = -ENOMEM; | |
b0c632db | 379 | |
4d47555a | 380 | vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
b0c632db | 381 | if (!vcpu) |
4d47555a | 382 | goto out; |
b0c632db | 383 | |
180c12fb CB |
384 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
385 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
386 | |
387 | if (!vcpu->arch.sie_block) | |
388 | goto out_free_cpu; | |
389 | ||
390 | vcpu->arch.sie_block->icpua = id; | |
58f9460b CO |
391 | if (!kvm_is_ucontrol(kvm)) { |
392 | if (!kvm->arch.sca) { | |
393 | WARN_ON_ONCE(1); | |
394 | goto out_free_cpu; | |
395 | } | |
396 | if (!kvm->arch.sca->cpu[id].sda) | |
397 | kvm->arch.sca->cpu[id].sda = | |
398 | (__u64) vcpu->arch.sie_block; | |
399 | vcpu->arch.sie_block->scaoh = | |
400 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
401 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
402 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
403 | } | |
b0c632db | 404 | |
ba5c1e9b CO |
405 | spin_lock_init(&vcpu->arch.local_int.lock); |
406 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
407 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 408 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
409 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
410 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 411 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 412 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 413 | |
b0c632db HC |
414 | rc = kvm_vcpu_init(vcpu, kvm, id); |
415 | if (rc) | |
7b06bf2f | 416 | goto out_free_sie_block; |
b0c632db HC |
417 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
418 | vcpu->arch.sie_block); | |
419 | ||
b0c632db | 420 | return vcpu; |
7b06bf2f WY |
421 | out_free_sie_block: |
422 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db HC |
423 | out_free_cpu: |
424 | kfree(vcpu); | |
4d47555a | 425 | out: |
b0c632db HC |
426 | return ERR_PTR(rc); |
427 | } | |
428 | ||
b0c632db HC |
429 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
430 | { | |
431 | /* kvm common code refers to this, but never calls it */ | |
432 | BUG(); | |
433 | return 0; | |
434 | } | |
435 | ||
b6d33834 CD |
436 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
437 | { | |
438 | /* kvm common code refers to this, but never calls it */ | |
439 | BUG(); | |
440 | return 0; | |
441 | } | |
442 | ||
14eebd91 CO |
443 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
444 | struct kvm_one_reg *reg) | |
445 | { | |
446 | int r = -EINVAL; | |
447 | ||
448 | switch (reg->id) { | |
449 | default: | |
450 | break; | |
451 | } | |
452 | ||
453 | return r; | |
454 | } | |
455 | ||
456 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
457 | struct kvm_one_reg *reg) | |
458 | { | |
459 | int r = -EINVAL; | |
460 | ||
461 | switch (reg->id) { | |
462 | default: | |
463 | break; | |
464 | } | |
465 | ||
466 | return r; | |
467 | } | |
b6d33834 | 468 | |
b0c632db HC |
469 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
470 | { | |
b0c632db | 471 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
472 | return 0; |
473 | } | |
474 | ||
475 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
476 | { | |
5a32c1af | 477 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
478 | return 0; |
479 | } | |
480 | ||
481 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
482 | { | |
5a32c1af | 483 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
484 | return 0; |
485 | } | |
486 | ||
487 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
488 | struct kvm_sregs *sregs) | |
489 | { | |
59674c1a | 490 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 491 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 492 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
493 | return 0; |
494 | } | |
495 | ||
496 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
497 | struct kvm_sregs *sregs) | |
498 | { | |
59674c1a | 499 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 500 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
501 | return 0; |
502 | } | |
503 | ||
504 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
505 | { | |
b0c632db | 506 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
85175587 | 507 | vcpu->arch.guest_fpregs.fpc = fpu->fpc & FPC_VALID_MASK; |
7eef87dc | 508 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
b0c632db HC |
509 | return 0; |
510 | } | |
511 | ||
512 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
513 | { | |
b0c632db HC |
514 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
515 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
516 | return 0; |
517 | } | |
518 | ||
519 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
520 | { | |
521 | int rc = 0; | |
522 | ||
9e6dabef | 523 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 524 | rc = -EBUSY; |
d7b0b5eb CO |
525 | else { |
526 | vcpu->run->psw_mask = psw.mask; | |
527 | vcpu->run->psw_addr = psw.addr; | |
528 | } | |
b0c632db HC |
529 | return rc; |
530 | } | |
531 | ||
532 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
533 | struct kvm_translation *tr) | |
534 | { | |
535 | return -EINVAL; /* not implemented yet */ | |
536 | } | |
537 | ||
d0bfb940 JK |
538 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
539 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
540 | { |
541 | return -EINVAL; /* not implemented yet */ | |
542 | } | |
543 | ||
62d9f0db MT |
544 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
545 | struct kvm_mp_state *mp_state) | |
546 | { | |
547 | return -EINVAL; /* not implemented yet */ | |
548 | } | |
549 | ||
550 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
551 | struct kvm_mp_state *mp_state) | |
552 | { | |
553 | return -EINVAL; /* not implemented yet */ | |
554 | } | |
555 | ||
e168bf8d | 556 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
b0c632db | 557 | { |
e168bf8d CO |
558 | int rc; |
559 | ||
5a32c1af | 560 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
561 | |
562 | if (need_resched()) | |
563 | schedule(); | |
564 | ||
71cde587 CB |
565 | if (test_thread_flag(TIF_MCCK_PENDING)) |
566 | s390_handle_mcck(); | |
567 | ||
d6b6d166 CO |
568 | if (!kvm_is_ucontrol(vcpu->kvm)) |
569 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 570 | |
b0c632db HC |
571 | vcpu->arch.sie_block->icptcode = 0; |
572 | local_irq_disable(); | |
573 | kvm_guest_enter(); | |
574 | local_irq_enable(); | |
575 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
576 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
5a32c1af | 577 | rc = sie64a(vcpu->arch.sie_block, vcpu->run->s.regs.gprs); |
e168bf8d CO |
578 | if (rc) { |
579 | if (kvm_is_ucontrol(vcpu->kvm)) { | |
580 | rc = SIE_INTERCEPT_UCONTROL; | |
581 | } else { | |
582 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
583 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
584 | rc = 0; | |
585 | } | |
1f0d0f09 | 586 | } |
b0c632db HC |
587 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
588 | vcpu->arch.sie_block->icptcode); | |
589 | local_irq_disable(); | |
590 | kvm_guest_exit(); | |
591 | local_irq_enable(); | |
592 | ||
5a32c1af | 593 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
e168bf8d | 594 | return rc; |
b0c632db HC |
595 | } |
596 | ||
597 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
598 | { | |
8f2abe6a | 599 | int rc; |
b0c632db HC |
600 | sigset_t sigsaved; |
601 | ||
9ace903d | 602 | rerun_vcpu: |
b0c632db HC |
603 | if (vcpu->sigset_active) |
604 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
605 | ||
9e6dabef | 606 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 607 | |
ba5c1e9b CO |
608 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
609 | ||
8f2abe6a CB |
610 | switch (kvm_run->exit_reason) { |
611 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 612 | case KVM_EXIT_UNKNOWN: |
9ace903d | 613 | case KVM_EXIT_INTR: |
8f2abe6a | 614 | case KVM_EXIT_S390_RESET: |
e168bf8d | 615 | case KVM_EXIT_S390_UCONTROL: |
8f2abe6a CB |
616 | break; |
617 | default: | |
618 | BUG(); | |
619 | } | |
620 | ||
d7b0b5eb CO |
621 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
622 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
60b413c9 CB |
623 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
624 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; | |
625 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
626 | } | |
9eed0735 CB |
627 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
628 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; | |
629 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
630 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
631 | } | |
d7b0b5eb | 632 | |
dab4079d | 633 | might_fault(); |
8f2abe6a CB |
634 | |
635 | do { | |
e168bf8d CO |
636 | rc = __vcpu_run(vcpu); |
637 | if (rc) | |
638 | break; | |
c0d744a9 CO |
639 | if (kvm_is_ucontrol(vcpu->kvm)) |
640 | rc = -EOPNOTSUPP; | |
641 | else | |
642 | rc = kvm_handle_sie_intercept(vcpu); | |
8f2abe6a CB |
643 | } while (!signal_pending(current) && !rc); |
644 | ||
9ace903d CE |
645 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
646 | goto rerun_vcpu; | |
647 | ||
b1d16c49 CE |
648 | if (signal_pending(current) && !rc) { |
649 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 650 | rc = -EINTR; |
b1d16c49 | 651 | } |
8f2abe6a | 652 | |
e168bf8d CO |
653 | #ifdef CONFIG_KVM_S390_UCONTROL |
654 | if (rc == SIE_INTERCEPT_UCONTROL) { | |
655 | kvm_run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
656 | kvm_run->s390_ucontrol.trans_exc_code = | |
657 | current->thread.gmap_addr; | |
658 | kvm_run->s390_ucontrol.pgm_code = 0x10; | |
659 | rc = 0; | |
660 | } | |
661 | #endif | |
662 | ||
b8e660b8 | 663 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
664 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
665 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
666 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
667 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
668 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
669 | rc = 0; | |
670 | } | |
671 | ||
672 | if (rc == -EREMOTE) { | |
673 | /* intercept was handled, but userspace support is needed | |
674 | * kvm_run has been prepared by the handler */ | |
675 | rc = 0; | |
676 | } | |
b0c632db | 677 | |
d7b0b5eb CO |
678 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
679 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
60b413c9 | 680 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
9eed0735 | 681 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
d7b0b5eb | 682 | |
b0c632db HC |
683 | if (vcpu->sigset_active) |
684 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
685 | ||
b0c632db | 686 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 687 | return rc; |
b0c632db HC |
688 | } |
689 | ||
092670cd | 690 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
691 | unsigned long n, int prefix) |
692 | { | |
693 | if (prefix) | |
694 | return copy_to_guest(vcpu, guestdest, from, n); | |
695 | else | |
696 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
697 | } | |
698 | ||
699 | /* | |
700 | * store status at address | |
701 | * we use have two special cases: | |
702 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
703 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
704 | */ | |
971eb77f | 705 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 706 | { |
092670cd | 707 | unsigned char archmode = 1; |
b0c632db HC |
708 | int prefix; |
709 | ||
710 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
711 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
712 | return -EFAULT; | |
713 | addr = SAVE_AREA_BASE; | |
714 | prefix = 0; | |
715 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
716 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
717 | return -EFAULT; | |
718 | addr = SAVE_AREA_BASE; | |
719 | prefix = 1; | |
720 | } else | |
721 | prefix = 0; | |
722 | ||
f64ca217 | 723 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
724 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
725 | return -EFAULT; | |
726 | ||
f64ca217 | 727 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
5a32c1af | 728 | vcpu->run->s.regs.gprs, 128, prefix)) |
b0c632db HC |
729 | return -EFAULT; |
730 | ||
f64ca217 | 731 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
732 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
733 | return -EFAULT; | |
734 | ||
f64ca217 | 735 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
736 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
737 | return -EFAULT; | |
738 | ||
739 | if (__guestcopy(vcpu, | |
f64ca217 | 740 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
741 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
742 | return -EFAULT; | |
743 | ||
f64ca217 | 744 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
745 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
746 | return -EFAULT; | |
747 | ||
f64ca217 | 748 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
749 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
750 | return -EFAULT; | |
751 | ||
f64ca217 | 752 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
753 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
754 | return -EFAULT; | |
755 | ||
f64ca217 | 756 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
59674c1a | 757 | &vcpu->run->s.regs.acrs, 64, prefix)) |
b0c632db HC |
758 | return -EFAULT; |
759 | ||
760 | if (__guestcopy(vcpu, | |
f64ca217 | 761 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
762 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
763 | return -EFAULT; | |
764 | return 0; | |
765 | } | |
766 | ||
b0c632db HC |
767 | long kvm_arch_vcpu_ioctl(struct file *filp, |
768 | unsigned int ioctl, unsigned long arg) | |
769 | { | |
770 | struct kvm_vcpu *vcpu = filp->private_data; | |
771 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 772 | long r; |
b0c632db | 773 | |
93736624 AK |
774 | switch (ioctl) { |
775 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
776 | struct kvm_s390_interrupt s390int; |
777 | ||
93736624 | 778 | r = -EFAULT; |
ba5c1e9b | 779 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
780 | break; |
781 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
782 | break; | |
ba5c1e9b | 783 | } |
b0c632db | 784 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
785 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
786 | break; | |
b0c632db HC |
787 | case KVM_S390_SET_INITIAL_PSW: { |
788 | psw_t psw; | |
789 | ||
bc923cc9 | 790 | r = -EFAULT; |
b0c632db | 791 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
792 | break; |
793 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
794 | break; | |
b0c632db HC |
795 | } |
796 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
797 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
798 | break; | |
14eebd91 CO |
799 | case KVM_SET_ONE_REG: |
800 | case KVM_GET_ONE_REG: { | |
801 | struct kvm_one_reg reg; | |
802 | r = -EFAULT; | |
803 | if (copy_from_user(®, argp, sizeof(reg))) | |
804 | break; | |
805 | if (ioctl == KVM_SET_ONE_REG) | |
806 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
807 | else | |
808 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
809 | break; | |
810 | } | |
27e0393f CO |
811 | #ifdef CONFIG_KVM_S390_UCONTROL |
812 | case KVM_S390_UCAS_MAP: { | |
813 | struct kvm_s390_ucas_mapping ucasmap; | |
814 | ||
815 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
816 | r = -EFAULT; | |
817 | break; | |
818 | } | |
819 | ||
820 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
821 | r = -EINVAL; | |
822 | break; | |
823 | } | |
824 | ||
825 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
826 | ucasmap.vcpu_addr, ucasmap.length); | |
827 | break; | |
828 | } | |
829 | case KVM_S390_UCAS_UNMAP: { | |
830 | struct kvm_s390_ucas_mapping ucasmap; | |
831 | ||
832 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
833 | r = -EFAULT; | |
834 | break; | |
835 | } | |
836 | ||
837 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
838 | r = -EINVAL; | |
839 | break; | |
840 | } | |
841 | ||
842 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
843 | ucasmap.length); | |
844 | break; | |
845 | } | |
846 | #endif | |
ccc7910f CO |
847 | case KVM_S390_VCPU_FAULT: { |
848 | r = gmap_fault(arg, vcpu->arch.gmap); | |
849 | if (!IS_ERR_VALUE(r)) | |
850 | r = 0; | |
851 | break; | |
852 | } | |
b0c632db | 853 | default: |
3e6afcf1 | 854 | r = -ENOTTY; |
b0c632db | 855 | } |
bc923cc9 | 856 | return r; |
b0c632db HC |
857 | } |
858 | ||
5b1c1493 CO |
859 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
860 | { | |
861 | #ifdef CONFIG_KVM_S390_UCONTROL | |
862 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
863 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
864 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
865 | get_page(vmf->page); | |
866 | return 0; | |
867 | } | |
868 | #endif | |
869 | return VM_FAULT_SIGBUS; | |
870 | } | |
871 | ||
db3fe4eb TY |
872 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, |
873 | struct kvm_memory_slot *dont) | |
874 | { | |
875 | } | |
876 | ||
877 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) | |
878 | { | |
879 | return 0; | |
880 | } | |
881 | ||
b0c632db | 882 | /* Section: memory related */ |
f7784b8e MT |
883 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
884 | struct kvm_memory_slot *memslot, | |
885 | struct kvm_memory_slot old, | |
886 | struct kvm_userspace_memory_region *mem, | |
887 | int user_alloc) | |
b0c632db HC |
888 | { |
889 | /* A few sanity checks. We can have exactly one memory slot which has | |
890 | to start at guest virtual zero and which has to be located at a | |
891 | page boundary in userland and which has to end at a page boundary. | |
892 | The memory in userland is ok to be fragmented into various different | |
893 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
894 | doing this call at any time */ | |
895 | ||
628eb9b8 | 896 | if (mem->slot) |
b0c632db HC |
897 | return -EINVAL; |
898 | ||
899 | if (mem->guest_phys_addr) | |
900 | return -EINVAL; | |
901 | ||
598841ca | 902 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
903 | return -EINVAL; |
904 | ||
598841ca | 905 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
906 | return -EINVAL; |
907 | ||
2668dab7 CO |
908 | if (!user_alloc) |
909 | return -EINVAL; | |
910 | ||
f7784b8e MT |
911 | return 0; |
912 | } | |
913 | ||
914 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
915 | struct kvm_userspace_memory_region *mem, | |
916 | struct kvm_memory_slot old, | |
917 | int user_alloc) | |
918 | { | |
f7850c92 | 919 | int rc; |
f7784b8e | 920 | |
598841ca CO |
921 | |
922 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
923 | mem->guest_phys_addr, mem->memory_size); | |
924 | if (rc) | |
f7850c92 | 925 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 926 | return; |
b0c632db HC |
927 | } |
928 | ||
34d4cb8f MT |
929 | void kvm_arch_flush_shadow(struct kvm *kvm) |
930 | { | |
931 | } | |
932 | ||
b0c632db HC |
933 | static int __init kvm_s390_init(void) |
934 | { | |
ef50f7ac | 935 | int ret; |
0ee75bea | 936 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
937 | if (ret) |
938 | return ret; | |
939 | ||
940 | /* | |
941 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 942 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
943 | * only set facilities that are known to work in KVM. |
944 | */ | |
c2f0e8c8 | 945 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
946 | if (!facilities) { |
947 | kvm_exit(); | |
948 | return -ENOMEM; | |
949 | } | |
14375bc4 | 950 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
6d00d00b | 951 | facilities[0] &= 0xff00fff3f47c0000ULL; |
9950f8be | 952 | facilities[1] &= 0x201c000000000000ULL; |
ef50f7ac | 953 | return 0; |
b0c632db HC |
954 | } |
955 | ||
956 | static void __exit kvm_s390_exit(void) | |
957 | { | |
ef50f7ac | 958 | free_page((unsigned long) facilities); |
b0c632db HC |
959 | kvm_exit(); |
960 | } | |
961 | ||
962 | module_init(kvm_s390_init); | |
963 | module_exit(kvm_s390_exit); |