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b0c632db HC |
1 | /* |
2 | * s390host.c -- hosting zSeries kernel virtual machines | |
3 | * | |
4 | * Copyright IBM Corp. 2008 | |
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> | |
13 | */ | |
14 | ||
15 | #include <linux/compiler.h> | |
16 | #include <linux/err.h> | |
17 | #include <linux/fs.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/kvm.h> | |
20 | #include <linux/kvm_host.h> | |
21 | #include <linux/module.h> | |
22 | #include <linux/slab.h> | |
23 | #include <asm/lowcore.h> | |
24 | #include <asm/pgtable.h> | |
25 | ||
8f2abe6a | 26 | #include "kvm-s390.h" |
b0c632db HC |
27 | #include "gaccess.h" |
28 | ||
29 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
30 | ||
31 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
32 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
8f2abe6a CB |
33 | { "exit_validity", VCPU_STAT(exit_validity) }, |
34 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
35 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
36 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
b0c632db HC |
37 | { NULL } |
38 | }; | |
39 | ||
40 | ||
41 | /* Section: not file related */ | |
42 | void kvm_arch_hardware_enable(void *garbage) | |
43 | { | |
44 | /* every s390 is virtualization enabled ;-) */ | |
45 | } | |
46 | ||
47 | void kvm_arch_hardware_disable(void *garbage) | |
48 | { | |
49 | } | |
50 | ||
51 | void decache_vcpus_on_cpu(int cpu) | |
52 | { | |
53 | } | |
54 | ||
55 | int kvm_arch_hardware_setup(void) | |
56 | { | |
57 | return 0; | |
58 | } | |
59 | ||
60 | void kvm_arch_hardware_unsetup(void) | |
61 | { | |
62 | } | |
63 | ||
64 | void kvm_arch_check_processor_compat(void *rtn) | |
65 | { | |
66 | } | |
67 | ||
68 | int kvm_arch_init(void *opaque) | |
69 | { | |
70 | return 0; | |
71 | } | |
72 | ||
73 | void kvm_arch_exit(void) | |
74 | { | |
75 | } | |
76 | ||
77 | /* Section: device related */ | |
78 | long kvm_arch_dev_ioctl(struct file *filp, | |
79 | unsigned int ioctl, unsigned long arg) | |
80 | { | |
81 | if (ioctl == KVM_S390_ENABLE_SIE) | |
82 | return s390_enable_sie(); | |
83 | return -EINVAL; | |
84 | } | |
85 | ||
86 | int kvm_dev_ioctl_check_extension(long ext) | |
87 | { | |
88 | return 0; | |
89 | } | |
90 | ||
91 | /* Section: vm related */ | |
92 | /* | |
93 | * Get (and clear) the dirty memory log for a memory slot. | |
94 | */ | |
95 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
96 | struct kvm_dirty_log *log) | |
97 | { | |
98 | return 0; | |
99 | } | |
100 | ||
101 | long kvm_arch_vm_ioctl(struct file *filp, | |
102 | unsigned int ioctl, unsigned long arg) | |
103 | { | |
104 | struct kvm *kvm = filp->private_data; | |
105 | void __user *argp = (void __user *)arg; | |
106 | int r; | |
107 | ||
108 | switch (ioctl) { | |
109 | default: | |
110 | r = -EINVAL; | |
111 | } | |
112 | ||
113 | return r; | |
114 | } | |
115 | ||
116 | struct kvm *kvm_arch_create_vm(void) | |
117 | { | |
118 | struct kvm *kvm; | |
119 | int rc; | |
120 | char debug_name[16]; | |
121 | ||
122 | rc = s390_enable_sie(); | |
123 | if (rc) | |
124 | goto out_nokvm; | |
125 | ||
126 | rc = -ENOMEM; | |
127 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
128 | if (!kvm) | |
129 | goto out_nokvm; | |
130 | ||
131 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); | |
132 | if (!kvm->arch.sca) | |
133 | goto out_nosca; | |
134 | ||
135 | sprintf(debug_name, "kvm-%u", current->pid); | |
136 | ||
137 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
138 | if (!kvm->arch.dbf) | |
139 | goto out_nodbf; | |
140 | ||
141 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); | |
142 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
143 | ||
144 | try_module_get(THIS_MODULE); | |
145 | ||
146 | return kvm; | |
147 | out_nodbf: | |
148 | free_page((unsigned long)(kvm->arch.sca)); | |
149 | out_nosca: | |
150 | kfree(kvm); | |
151 | out_nokvm: | |
152 | return ERR_PTR(rc); | |
153 | } | |
154 | ||
155 | void kvm_arch_destroy_vm(struct kvm *kvm) | |
156 | { | |
157 | debug_unregister(kvm->arch.dbf); | |
158 | free_page((unsigned long)(kvm->arch.sca)); | |
159 | kfree(kvm); | |
160 | module_put(THIS_MODULE); | |
161 | } | |
162 | ||
163 | /* Section: vcpu related */ | |
164 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
165 | { | |
166 | return 0; | |
167 | } | |
168 | ||
169 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
170 | { | |
171 | /* kvm common code refers to this, but does'nt call it */ | |
172 | BUG(); | |
173 | } | |
174 | ||
175 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
176 | { | |
177 | save_fp_regs(&vcpu->arch.host_fpregs); | |
178 | save_access_regs(vcpu->arch.host_acrs); | |
179 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
180 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
181 | restore_access_regs(vcpu->arch.guest_acrs); | |
182 | ||
183 | if (signal_pending(current)) | |
184 | atomic_set_mask(CPUSTAT_STOP_INT, | |
185 | &vcpu->arch.sie_block->cpuflags); | |
186 | } | |
187 | ||
188 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
189 | { | |
190 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
191 | save_access_regs(vcpu->arch.guest_acrs); | |
192 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
193 | restore_access_regs(vcpu->arch.host_acrs); | |
194 | } | |
195 | ||
196 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
197 | { | |
198 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
199 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
200 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
201 | vcpu->arch.sie_block->prefix = 0UL; | |
202 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
203 | vcpu->arch.sie_block->cputm = 0UL; | |
204 | vcpu->arch.sie_block->ckc = 0UL; | |
205 | vcpu->arch.sie_block->todpr = 0; | |
206 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
207 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
208 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
209 | vcpu->arch.guest_fpregs.fpc = 0; | |
210 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
211 | vcpu->arch.sie_block->gbea = 1; | |
212 | } | |
213 | ||
214 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
215 | { | |
216 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); | |
217 | vcpu->arch.sie_block->gmslm = 0xffffffffffUL; | |
218 | vcpu->arch.sie_block->gmsor = 0x000000000000; | |
219 | vcpu->arch.sie_block->ecb = 2; | |
220 | vcpu->arch.sie_block->eca = 0xC1002001U; | |
221 | ||
222 | return 0; | |
223 | } | |
224 | ||
225 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
226 | unsigned int id) | |
227 | { | |
228 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
229 | int rc = -ENOMEM; | |
230 | ||
231 | if (!vcpu) | |
232 | goto out_nomem; | |
233 | ||
234 | vcpu->arch.sie_block = (struct sie_block *) get_zeroed_page(GFP_KERNEL); | |
235 | ||
236 | if (!vcpu->arch.sie_block) | |
237 | goto out_free_cpu; | |
238 | ||
239 | vcpu->arch.sie_block->icpua = id; | |
240 | BUG_ON(!kvm->arch.sca); | |
241 | BUG_ON(kvm->arch.sca->cpu[id].sda); | |
242 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
243 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); | |
244 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
245 | ||
246 | rc = kvm_vcpu_init(vcpu, kvm, id); | |
247 | if (rc) | |
248 | goto out_free_cpu; | |
249 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, | |
250 | vcpu->arch.sie_block); | |
251 | ||
252 | try_module_get(THIS_MODULE); | |
253 | ||
254 | return vcpu; | |
255 | out_free_cpu: | |
256 | kfree(vcpu); | |
257 | out_nomem: | |
258 | return ERR_PTR(rc); | |
259 | } | |
260 | ||
261 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
262 | { | |
263 | VCPU_EVENT(vcpu, 3, "%s", "destroy cpu"); | |
264 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
265 | kfree(vcpu); | |
266 | module_put(THIS_MODULE); | |
267 | } | |
268 | ||
269 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) | |
270 | { | |
271 | /* kvm common code refers to this, but never calls it */ | |
272 | BUG(); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
277 | { | |
278 | vcpu_load(vcpu); | |
279 | kvm_s390_vcpu_initial_reset(vcpu); | |
280 | vcpu_put(vcpu); | |
281 | return 0; | |
282 | } | |
283 | ||
284 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
285 | { | |
286 | vcpu_load(vcpu); | |
287 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); | |
288 | vcpu_put(vcpu); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
293 | { | |
294 | vcpu_load(vcpu); | |
295 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); | |
296 | vcpu_put(vcpu); | |
297 | return 0; | |
298 | } | |
299 | ||
300 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
301 | struct kvm_sregs *sregs) | |
302 | { | |
303 | vcpu_load(vcpu); | |
304 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); | |
305 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
306 | vcpu_put(vcpu); | |
307 | return 0; | |
308 | } | |
309 | ||
310 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
311 | struct kvm_sregs *sregs) | |
312 | { | |
313 | vcpu_load(vcpu); | |
314 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); | |
315 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
316 | vcpu_put(vcpu); | |
317 | return 0; | |
318 | } | |
319 | ||
320 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
321 | { | |
322 | vcpu_load(vcpu); | |
323 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
324 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
325 | vcpu_put(vcpu); | |
326 | return 0; | |
327 | } | |
328 | ||
329 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
330 | { | |
331 | vcpu_load(vcpu); | |
332 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); | |
333 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
334 | vcpu_put(vcpu); | |
335 | return 0; | |
336 | } | |
337 | ||
338 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
339 | { | |
340 | int rc = 0; | |
341 | ||
342 | vcpu_load(vcpu); | |
343 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) | |
344 | rc = -EBUSY; | |
345 | else | |
346 | vcpu->arch.sie_block->gpsw = psw; | |
347 | vcpu_put(vcpu); | |
348 | return rc; | |
349 | } | |
350 | ||
351 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
352 | struct kvm_translation *tr) | |
353 | { | |
354 | return -EINVAL; /* not implemented yet */ | |
355 | } | |
356 | ||
357 | int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, | |
358 | struct kvm_debug_guest *dbg) | |
359 | { | |
360 | return -EINVAL; /* not implemented yet */ | |
361 | } | |
362 | ||
363 | static void __vcpu_run(struct kvm_vcpu *vcpu) | |
364 | { | |
365 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
366 | ||
367 | if (need_resched()) | |
368 | schedule(); | |
369 | ||
370 | vcpu->arch.sie_block->icptcode = 0; | |
371 | local_irq_disable(); | |
372 | kvm_guest_enter(); | |
373 | local_irq_enable(); | |
374 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
375 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
376 | sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs); | |
377 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
378 | vcpu->arch.sie_block->icptcode); | |
379 | local_irq_disable(); | |
380 | kvm_guest_exit(); | |
381 | local_irq_enable(); | |
382 | ||
383 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
384 | } | |
385 | ||
386 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
387 | { | |
8f2abe6a | 388 | int rc; |
b0c632db HC |
389 | sigset_t sigsaved; |
390 | ||
391 | vcpu_load(vcpu); | |
392 | ||
393 | if (vcpu->sigset_active) | |
394 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
395 | ||
396 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
397 | ||
8f2abe6a CB |
398 | switch (kvm_run->exit_reason) { |
399 | case KVM_EXIT_S390_SIEIC: | |
400 | vcpu->arch.sie_block->gpsw.mask = kvm_run->s390_sieic.mask; | |
401 | vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr; | |
402 | break; | |
403 | case KVM_EXIT_UNKNOWN: | |
404 | case KVM_EXIT_S390_RESET: | |
405 | break; | |
406 | default: | |
407 | BUG(); | |
408 | } | |
409 | ||
410 | might_sleep(); | |
411 | ||
412 | do { | |
413 | __vcpu_run(vcpu); | |
414 | ||
415 | rc = kvm_handle_sie_intercept(vcpu); | |
416 | } while (!signal_pending(current) && !rc); | |
417 | ||
418 | if (signal_pending(current) && !rc) | |
419 | rc = -EINTR; | |
420 | ||
421 | if (rc == -ENOTSUPP) { | |
422 | /* intercept cannot be handled in-kernel, prepare kvm-run */ | |
423 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
424 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
425 | kvm_run->s390_sieic.mask = vcpu->arch.sie_block->gpsw.mask; | |
426 | kvm_run->s390_sieic.addr = vcpu->arch.sie_block->gpsw.addr; | |
427 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
428 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
429 | rc = 0; | |
430 | } | |
431 | ||
432 | if (rc == -EREMOTE) { | |
433 | /* intercept was handled, but userspace support is needed | |
434 | * kvm_run has been prepared by the handler */ | |
435 | rc = 0; | |
436 | } | |
b0c632db HC |
437 | |
438 | if (vcpu->sigset_active) | |
439 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
440 | ||
441 | vcpu_put(vcpu); | |
442 | ||
443 | vcpu->stat.exit_userspace++; | |
444 | return 0; | |
445 | } | |
446 | ||
447 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, | |
448 | unsigned long n, int prefix) | |
449 | { | |
450 | if (prefix) | |
451 | return copy_to_guest(vcpu, guestdest, from, n); | |
452 | else | |
453 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
454 | } | |
455 | ||
456 | /* | |
457 | * store status at address | |
458 | * we use have two special cases: | |
459 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
460 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
461 | */ | |
462 | int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
463 | { | |
464 | const unsigned char archmode = 1; | |
465 | int prefix; | |
466 | ||
467 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
468 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
469 | return -EFAULT; | |
470 | addr = SAVE_AREA_BASE; | |
471 | prefix = 0; | |
472 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
473 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
474 | return -EFAULT; | |
475 | addr = SAVE_AREA_BASE; | |
476 | prefix = 1; | |
477 | } else | |
478 | prefix = 0; | |
479 | ||
480 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, fp_regs), | |
481 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) | |
482 | return -EFAULT; | |
483 | ||
484 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, gp_regs), | |
485 | vcpu->arch.guest_gprs, 128, prefix)) | |
486 | return -EFAULT; | |
487 | ||
488 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, psw), | |
489 | &vcpu->arch.sie_block->gpsw, 16, prefix)) | |
490 | return -EFAULT; | |
491 | ||
492 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, pref_reg), | |
493 | &vcpu->arch.sie_block->prefix, 4, prefix)) | |
494 | return -EFAULT; | |
495 | ||
496 | if (__guestcopy(vcpu, | |
497 | addr + offsetof(struct save_area_s390x, fp_ctrl_reg), | |
498 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) | |
499 | return -EFAULT; | |
500 | ||
501 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, tod_reg), | |
502 | &vcpu->arch.sie_block->todpr, 4, prefix)) | |
503 | return -EFAULT; | |
504 | ||
505 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, timer), | |
506 | &vcpu->arch.sie_block->cputm, 8, prefix)) | |
507 | return -EFAULT; | |
508 | ||
509 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, clk_cmp), | |
510 | &vcpu->arch.sie_block->ckc, 8, prefix)) | |
511 | return -EFAULT; | |
512 | ||
513 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, acc_regs), | |
514 | &vcpu->arch.guest_acrs, 64, prefix)) | |
515 | return -EFAULT; | |
516 | ||
517 | if (__guestcopy(vcpu, | |
518 | addr + offsetof(struct save_area_s390x, ctrl_regs), | |
519 | &vcpu->arch.sie_block->gcr, 128, prefix)) | |
520 | return -EFAULT; | |
521 | return 0; | |
522 | } | |
523 | ||
524 | static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
525 | { | |
526 | int rc; | |
527 | ||
528 | vcpu_load(vcpu); | |
529 | rc = __kvm_s390_vcpu_store_status(vcpu, addr); | |
530 | vcpu_put(vcpu); | |
531 | return rc; | |
532 | } | |
533 | ||
534 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
535 | unsigned int ioctl, unsigned long arg) | |
536 | { | |
537 | struct kvm_vcpu *vcpu = filp->private_data; | |
538 | void __user *argp = (void __user *)arg; | |
539 | ||
540 | switch (ioctl) { | |
541 | case KVM_S390_STORE_STATUS: | |
542 | return kvm_s390_vcpu_store_status(vcpu, arg); | |
543 | case KVM_S390_SET_INITIAL_PSW: { | |
544 | psw_t psw; | |
545 | ||
546 | if (copy_from_user(&psw, argp, sizeof(psw))) | |
547 | return -EFAULT; | |
548 | return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
549 | } | |
550 | case KVM_S390_INITIAL_RESET: | |
551 | return kvm_arch_vcpu_ioctl_initial_reset(vcpu); | |
552 | default: | |
553 | ; | |
554 | } | |
555 | return -EINVAL; | |
556 | } | |
557 | ||
558 | /* Section: memory related */ | |
559 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
560 | struct kvm_userspace_memory_region *mem, | |
561 | struct kvm_memory_slot old, | |
562 | int user_alloc) | |
563 | { | |
564 | /* A few sanity checks. We can have exactly one memory slot which has | |
565 | to start at guest virtual zero and which has to be located at a | |
566 | page boundary in userland and which has to end at a page boundary. | |
567 | The memory in userland is ok to be fragmented into various different | |
568 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
569 | doing this call at any time */ | |
570 | ||
571 | if (mem->slot) | |
572 | return -EINVAL; | |
573 | ||
574 | if (mem->guest_phys_addr) | |
575 | return -EINVAL; | |
576 | ||
577 | if (mem->userspace_addr & (PAGE_SIZE - 1)) | |
578 | return -EINVAL; | |
579 | ||
580 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
581 | return -EINVAL; | |
582 | ||
583 | kvm->arch.guest_origin = mem->userspace_addr; | |
584 | kvm->arch.guest_memsize = mem->memory_size; | |
585 | ||
586 | /* FIXME: we do want to interrupt running CPUs and update their memory | |
587 | configuration now to avoid race conditions. But hey, changing the | |
588 | memory layout while virtual CPUs are running is usually bad | |
589 | programming practice. */ | |
590 | ||
591 | return 0; | |
592 | } | |
593 | ||
594 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) | |
595 | { | |
596 | return gfn; | |
597 | } | |
598 | ||
599 | static int __init kvm_s390_init(void) | |
600 | { | |
601 | return kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE); | |
602 | } | |
603 | ||
604 | static void __exit kvm_s390_exit(void) | |
605 | { | |
606 | kvm_exit(); | |
607 | } | |
608 | ||
609 | module_init(kvm_s390_init); | |
610 | module_exit(kvm_s390_exit); |