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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> | |
ba5c1e9b | 23 | #include <linux/timer.h> |
b0c632db HC |
24 | #include <asm/lowcore.h> |
25 | #include <asm/pgtable.h> | |
26 | ||
8f2abe6a | 27 | #include "kvm-s390.h" |
b0c632db HC |
28 | #include "gaccess.h" |
29 | ||
30 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
31 | ||
32 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
33 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
8f2abe6a CB |
34 | { "exit_validity", VCPU_STAT(exit_validity) }, |
35 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
36 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
37 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
38 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
39 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
40 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
41 | { "instruction_lctg", VCPU_STAT(instruction_lctg) }, | |
42 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, | |
43 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, | |
44 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, | |
45 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
46 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
47 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
48 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
49 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
50 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
453423dc CB |
51 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
52 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
53 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
54 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
55 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
56 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
57 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
58 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
59 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
5288fbf0 CB |
60 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
61 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, | |
62 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
63 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
64 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
65 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
e28acfea | 66 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
b0c632db HC |
67 | { NULL } |
68 | }; | |
69 | ||
70 | ||
71 | /* Section: not file related */ | |
72 | void kvm_arch_hardware_enable(void *garbage) | |
73 | { | |
74 | /* every s390 is virtualization enabled ;-) */ | |
75 | } | |
76 | ||
77 | void kvm_arch_hardware_disable(void *garbage) | |
78 | { | |
79 | } | |
80 | ||
81 | void decache_vcpus_on_cpu(int cpu) | |
82 | { | |
83 | } | |
84 | ||
85 | int kvm_arch_hardware_setup(void) | |
86 | { | |
87 | return 0; | |
88 | } | |
89 | ||
90 | void kvm_arch_hardware_unsetup(void) | |
91 | { | |
92 | } | |
93 | ||
94 | void kvm_arch_check_processor_compat(void *rtn) | |
95 | { | |
96 | } | |
97 | ||
98 | int kvm_arch_init(void *opaque) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | ||
103 | void kvm_arch_exit(void) | |
104 | { | |
105 | } | |
106 | ||
107 | /* Section: device related */ | |
108 | long kvm_arch_dev_ioctl(struct file *filp, | |
109 | unsigned int ioctl, unsigned long arg) | |
110 | { | |
111 | if (ioctl == KVM_S390_ENABLE_SIE) | |
112 | return s390_enable_sie(); | |
113 | return -EINVAL; | |
114 | } | |
115 | ||
116 | int kvm_dev_ioctl_check_extension(long ext) | |
117 | { | |
118 | return 0; | |
119 | } | |
120 | ||
121 | /* Section: vm related */ | |
122 | /* | |
123 | * Get (and clear) the dirty memory log for a memory slot. | |
124 | */ | |
125 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
126 | struct kvm_dirty_log *log) | |
127 | { | |
128 | return 0; | |
129 | } | |
130 | ||
131 | long kvm_arch_vm_ioctl(struct file *filp, | |
132 | unsigned int ioctl, unsigned long arg) | |
133 | { | |
134 | struct kvm *kvm = filp->private_data; | |
135 | void __user *argp = (void __user *)arg; | |
136 | int r; | |
137 | ||
138 | switch (ioctl) { | |
ba5c1e9b CO |
139 | case KVM_S390_INTERRUPT: { |
140 | struct kvm_s390_interrupt s390int; | |
141 | ||
142 | r = -EFAULT; | |
143 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
144 | break; | |
145 | r = kvm_s390_inject_vm(kvm, &s390int); | |
146 | break; | |
147 | } | |
b0c632db HC |
148 | default: |
149 | r = -EINVAL; | |
150 | } | |
151 | ||
152 | return r; | |
153 | } | |
154 | ||
155 | struct kvm *kvm_arch_create_vm(void) | |
156 | { | |
157 | struct kvm *kvm; | |
158 | int rc; | |
159 | char debug_name[16]; | |
160 | ||
161 | rc = s390_enable_sie(); | |
162 | if (rc) | |
163 | goto out_nokvm; | |
164 | ||
165 | rc = -ENOMEM; | |
166 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
167 | if (!kvm) | |
168 | goto out_nokvm; | |
169 | ||
170 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); | |
171 | if (!kvm->arch.sca) | |
172 | goto out_nosca; | |
173 | ||
174 | sprintf(debug_name, "kvm-%u", current->pid); | |
175 | ||
176 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
177 | if (!kvm->arch.dbf) | |
178 | goto out_nodbf; | |
179 | ||
ba5c1e9b CO |
180 | spin_lock_init(&kvm->arch.float_int.lock); |
181 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
182 | ||
b0c632db HC |
183 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
184 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
185 | ||
186 | try_module_get(THIS_MODULE); | |
187 | ||
188 | return kvm; | |
189 | out_nodbf: | |
190 | free_page((unsigned long)(kvm->arch.sca)); | |
191 | out_nosca: | |
192 | kfree(kvm); | |
193 | out_nokvm: | |
194 | return ERR_PTR(rc); | |
195 | } | |
196 | ||
197 | void kvm_arch_destroy_vm(struct kvm *kvm) | |
198 | { | |
199 | debug_unregister(kvm->arch.dbf); | |
200 | free_page((unsigned long)(kvm->arch.sca)); | |
201 | kfree(kvm); | |
202 | module_put(THIS_MODULE); | |
203 | } | |
204 | ||
205 | /* Section: vcpu related */ | |
206 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
207 | { | |
208 | return 0; | |
209 | } | |
210 | ||
211 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
212 | { | |
213 | /* kvm common code refers to this, but does'nt call it */ | |
214 | BUG(); | |
215 | } | |
216 | ||
217 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
218 | { | |
219 | save_fp_regs(&vcpu->arch.host_fpregs); | |
220 | save_access_regs(vcpu->arch.host_acrs); | |
221 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
222 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
223 | restore_access_regs(vcpu->arch.guest_acrs); | |
224 | ||
225 | if (signal_pending(current)) | |
226 | atomic_set_mask(CPUSTAT_STOP_INT, | |
227 | &vcpu->arch.sie_block->cpuflags); | |
228 | } | |
229 | ||
230 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
231 | { | |
232 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
233 | save_access_regs(vcpu->arch.guest_acrs); | |
234 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
235 | restore_access_regs(vcpu->arch.host_acrs); | |
236 | } | |
237 | ||
238 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
239 | { | |
240 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
241 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
242 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
243 | vcpu->arch.sie_block->prefix = 0UL; | |
244 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
245 | vcpu->arch.sie_block->cputm = 0UL; | |
246 | vcpu->arch.sie_block->ckc = 0UL; | |
247 | vcpu->arch.sie_block->todpr = 0; | |
248 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
249 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
250 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
251 | vcpu->arch.guest_fpregs.fpc = 0; | |
252 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
253 | vcpu->arch.sie_block->gbea = 1; | |
254 | } | |
255 | ||
256 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
257 | { | |
258 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); | |
259 | vcpu->arch.sie_block->gmslm = 0xffffffffffUL; | |
260 | vcpu->arch.sie_block->gmsor = 0x000000000000; | |
261 | vcpu->arch.sie_block->ecb = 2; | |
262 | vcpu->arch.sie_block->eca = 0xC1002001U; | |
ba5c1e9b CO |
263 | setup_timer(&vcpu->arch.ckc_timer, kvm_s390_idle_wakeup, |
264 | (unsigned long) vcpu); | |
453423dc CB |
265 | get_cpu_id(&vcpu->arch.cpu_id); |
266 | vcpu->arch.cpu_id.version = 0xfe; | |
b0c632db HC |
267 | return 0; |
268 | } | |
269 | ||
270 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
271 | unsigned int id) | |
272 | { | |
273 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
274 | int rc = -ENOMEM; | |
275 | ||
276 | if (!vcpu) | |
277 | goto out_nomem; | |
278 | ||
279 | vcpu->arch.sie_block = (struct sie_block *) get_zeroed_page(GFP_KERNEL); | |
280 | ||
281 | if (!vcpu->arch.sie_block) | |
282 | goto out_free_cpu; | |
283 | ||
284 | vcpu->arch.sie_block->icpua = id; | |
285 | BUG_ON(!kvm->arch.sca); | |
286 | BUG_ON(kvm->arch.sca->cpu[id].sda); | |
287 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
288 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); | |
289 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
290 | ||
ba5c1e9b CO |
291 | spin_lock_init(&vcpu->arch.local_int.lock); |
292 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
293 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
294 | spin_lock_bh(&kvm->arch.float_int.lock); | |
295 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; | |
296 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 297 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b CO |
298 | spin_unlock_bh(&kvm->arch.float_int.lock); |
299 | ||
b0c632db HC |
300 | rc = kvm_vcpu_init(vcpu, kvm, id); |
301 | if (rc) | |
302 | goto out_free_cpu; | |
303 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, | |
304 | vcpu->arch.sie_block); | |
305 | ||
306 | try_module_get(THIS_MODULE); | |
307 | ||
308 | return vcpu; | |
309 | out_free_cpu: | |
310 | kfree(vcpu); | |
311 | out_nomem: | |
312 | return ERR_PTR(rc); | |
313 | } | |
314 | ||
315 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
316 | { | |
317 | VCPU_EVENT(vcpu, 3, "%s", "destroy cpu"); | |
318 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
319 | kfree(vcpu); | |
320 | module_put(THIS_MODULE); | |
321 | } | |
322 | ||
323 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) | |
324 | { | |
325 | /* kvm common code refers to this, but never calls it */ | |
326 | BUG(); | |
327 | return 0; | |
328 | } | |
329 | ||
330 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
331 | { | |
332 | vcpu_load(vcpu); | |
333 | kvm_s390_vcpu_initial_reset(vcpu); | |
334 | vcpu_put(vcpu); | |
335 | return 0; | |
336 | } | |
337 | ||
338 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
339 | { | |
340 | vcpu_load(vcpu); | |
341 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); | |
342 | vcpu_put(vcpu); | |
343 | return 0; | |
344 | } | |
345 | ||
346 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
347 | { | |
348 | vcpu_load(vcpu); | |
349 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); | |
350 | vcpu_put(vcpu); | |
351 | return 0; | |
352 | } | |
353 | ||
354 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
355 | struct kvm_sregs *sregs) | |
356 | { | |
357 | vcpu_load(vcpu); | |
358 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); | |
359 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
360 | vcpu_put(vcpu); | |
361 | return 0; | |
362 | } | |
363 | ||
364 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
365 | struct kvm_sregs *sregs) | |
366 | { | |
367 | vcpu_load(vcpu); | |
368 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); | |
369 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
370 | vcpu_put(vcpu); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
375 | { | |
376 | vcpu_load(vcpu); | |
377 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
378 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
379 | vcpu_put(vcpu); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
384 | { | |
385 | vcpu_load(vcpu); | |
386 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); | |
387 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
388 | vcpu_put(vcpu); | |
389 | return 0; | |
390 | } | |
391 | ||
392 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
393 | { | |
394 | int rc = 0; | |
395 | ||
396 | vcpu_load(vcpu); | |
397 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) | |
398 | rc = -EBUSY; | |
399 | else | |
400 | vcpu->arch.sie_block->gpsw = psw; | |
401 | vcpu_put(vcpu); | |
402 | return rc; | |
403 | } | |
404 | ||
405 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
406 | struct kvm_translation *tr) | |
407 | { | |
408 | return -EINVAL; /* not implemented yet */ | |
409 | } | |
410 | ||
411 | int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, | |
412 | struct kvm_debug_guest *dbg) | |
413 | { | |
414 | return -EINVAL; /* not implemented yet */ | |
415 | } | |
416 | ||
417 | static void __vcpu_run(struct kvm_vcpu *vcpu) | |
418 | { | |
419 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
420 | ||
421 | if (need_resched()) | |
422 | schedule(); | |
423 | ||
424 | vcpu->arch.sie_block->icptcode = 0; | |
425 | local_irq_disable(); | |
426 | kvm_guest_enter(); | |
427 | local_irq_enable(); | |
428 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
429 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
430 | sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs); | |
431 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
432 | vcpu->arch.sie_block->icptcode); | |
433 | local_irq_disable(); | |
434 | kvm_guest_exit(); | |
435 | local_irq_enable(); | |
436 | ||
437 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
438 | } | |
439 | ||
440 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
441 | { | |
8f2abe6a | 442 | int rc; |
b0c632db HC |
443 | sigset_t sigsaved; |
444 | ||
445 | vcpu_load(vcpu); | |
446 | ||
447 | if (vcpu->sigset_active) | |
448 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
449 | ||
450 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
451 | ||
ba5c1e9b CO |
452 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
453 | ||
8f2abe6a CB |
454 | switch (kvm_run->exit_reason) { |
455 | case KVM_EXIT_S390_SIEIC: | |
456 | vcpu->arch.sie_block->gpsw.mask = kvm_run->s390_sieic.mask; | |
457 | vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr; | |
458 | break; | |
459 | case KVM_EXIT_UNKNOWN: | |
460 | case KVM_EXIT_S390_RESET: | |
461 | break; | |
462 | default: | |
463 | BUG(); | |
464 | } | |
465 | ||
466 | might_sleep(); | |
467 | ||
468 | do { | |
ba5c1e9b | 469 | kvm_s390_deliver_pending_interrupts(vcpu); |
8f2abe6a | 470 | __vcpu_run(vcpu); |
8f2abe6a CB |
471 | rc = kvm_handle_sie_intercept(vcpu); |
472 | } while (!signal_pending(current) && !rc); | |
473 | ||
474 | if (signal_pending(current) && !rc) | |
475 | rc = -EINTR; | |
476 | ||
477 | if (rc == -ENOTSUPP) { | |
478 | /* intercept cannot be handled in-kernel, prepare kvm-run */ | |
479 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
480 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
481 | kvm_run->s390_sieic.mask = vcpu->arch.sie_block->gpsw.mask; | |
482 | kvm_run->s390_sieic.addr = vcpu->arch.sie_block->gpsw.addr; | |
483 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
484 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
485 | rc = 0; | |
486 | } | |
487 | ||
488 | if (rc == -EREMOTE) { | |
489 | /* intercept was handled, but userspace support is needed | |
490 | * kvm_run has been prepared by the handler */ | |
491 | rc = 0; | |
492 | } | |
b0c632db HC |
493 | |
494 | if (vcpu->sigset_active) | |
495 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
496 | ||
497 | vcpu_put(vcpu); | |
498 | ||
499 | vcpu->stat.exit_userspace++; | |
7e8e6ab4 | 500 | return rc; |
b0c632db HC |
501 | } |
502 | ||
503 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, | |
504 | unsigned long n, int prefix) | |
505 | { | |
506 | if (prefix) | |
507 | return copy_to_guest(vcpu, guestdest, from, n); | |
508 | else | |
509 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
510 | } | |
511 | ||
512 | /* | |
513 | * store status at address | |
514 | * we use have two special cases: | |
515 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
516 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
517 | */ | |
518 | int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
519 | { | |
520 | const unsigned char archmode = 1; | |
521 | int prefix; | |
522 | ||
523 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
524 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
525 | return -EFAULT; | |
526 | addr = SAVE_AREA_BASE; | |
527 | prefix = 0; | |
528 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
529 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
530 | return -EFAULT; | |
531 | addr = SAVE_AREA_BASE; | |
532 | prefix = 1; | |
533 | } else | |
534 | prefix = 0; | |
535 | ||
536 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, fp_regs), | |
537 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) | |
538 | return -EFAULT; | |
539 | ||
540 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, gp_regs), | |
541 | vcpu->arch.guest_gprs, 128, prefix)) | |
542 | return -EFAULT; | |
543 | ||
544 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, psw), | |
545 | &vcpu->arch.sie_block->gpsw, 16, prefix)) | |
546 | return -EFAULT; | |
547 | ||
548 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, pref_reg), | |
549 | &vcpu->arch.sie_block->prefix, 4, prefix)) | |
550 | return -EFAULT; | |
551 | ||
552 | if (__guestcopy(vcpu, | |
553 | addr + offsetof(struct save_area_s390x, fp_ctrl_reg), | |
554 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) | |
555 | return -EFAULT; | |
556 | ||
557 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, tod_reg), | |
558 | &vcpu->arch.sie_block->todpr, 4, prefix)) | |
559 | return -EFAULT; | |
560 | ||
561 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, timer), | |
562 | &vcpu->arch.sie_block->cputm, 8, prefix)) | |
563 | return -EFAULT; | |
564 | ||
565 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, clk_cmp), | |
566 | &vcpu->arch.sie_block->ckc, 8, prefix)) | |
567 | return -EFAULT; | |
568 | ||
569 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, acc_regs), | |
570 | &vcpu->arch.guest_acrs, 64, prefix)) | |
571 | return -EFAULT; | |
572 | ||
573 | if (__guestcopy(vcpu, | |
574 | addr + offsetof(struct save_area_s390x, ctrl_regs), | |
575 | &vcpu->arch.sie_block->gcr, 128, prefix)) | |
576 | return -EFAULT; | |
577 | return 0; | |
578 | } | |
579 | ||
580 | static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
581 | { | |
582 | int rc; | |
583 | ||
584 | vcpu_load(vcpu); | |
585 | rc = __kvm_s390_vcpu_store_status(vcpu, addr); | |
586 | vcpu_put(vcpu); | |
587 | return rc; | |
588 | } | |
589 | ||
590 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
591 | unsigned int ioctl, unsigned long arg) | |
592 | { | |
593 | struct kvm_vcpu *vcpu = filp->private_data; | |
594 | void __user *argp = (void __user *)arg; | |
595 | ||
596 | switch (ioctl) { | |
ba5c1e9b CO |
597 | case KVM_S390_INTERRUPT: { |
598 | struct kvm_s390_interrupt s390int; | |
599 | ||
600 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
601 | return -EFAULT; | |
602 | return kvm_s390_inject_vcpu(vcpu, &s390int); | |
603 | } | |
b0c632db HC |
604 | case KVM_S390_STORE_STATUS: |
605 | return kvm_s390_vcpu_store_status(vcpu, arg); | |
606 | case KVM_S390_SET_INITIAL_PSW: { | |
607 | psw_t psw; | |
608 | ||
609 | if (copy_from_user(&psw, argp, sizeof(psw))) | |
610 | return -EFAULT; | |
611 | return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
612 | } | |
613 | case KVM_S390_INITIAL_RESET: | |
614 | return kvm_arch_vcpu_ioctl_initial_reset(vcpu); | |
615 | default: | |
616 | ; | |
617 | } | |
618 | return -EINVAL; | |
619 | } | |
620 | ||
621 | /* Section: memory related */ | |
622 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
623 | struct kvm_userspace_memory_region *mem, | |
624 | struct kvm_memory_slot old, | |
625 | int user_alloc) | |
626 | { | |
627 | /* A few sanity checks. We can have exactly one memory slot which has | |
628 | to start at guest virtual zero and which has to be located at a | |
629 | page boundary in userland and which has to end at a page boundary. | |
630 | The memory in userland is ok to be fragmented into various different | |
631 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
632 | doing this call at any time */ | |
633 | ||
634 | if (mem->slot) | |
635 | return -EINVAL; | |
636 | ||
637 | if (mem->guest_phys_addr) | |
638 | return -EINVAL; | |
639 | ||
640 | if (mem->userspace_addr & (PAGE_SIZE - 1)) | |
641 | return -EINVAL; | |
642 | ||
643 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
644 | return -EINVAL; | |
645 | ||
646 | kvm->arch.guest_origin = mem->userspace_addr; | |
647 | kvm->arch.guest_memsize = mem->memory_size; | |
648 | ||
649 | /* FIXME: we do want to interrupt running CPUs and update their memory | |
650 | configuration now to avoid race conditions. But hey, changing the | |
651 | memory layout while virtual CPUs are running is usually bad | |
652 | programming practice. */ | |
653 | ||
654 | return 0; | |
655 | } | |
656 | ||
657 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) | |
658 | { | |
659 | return gfn; | |
660 | } | |
661 | ||
662 | static int __init kvm_s390_init(void) | |
663 | { | |
664 | return kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE); | |
665 | } | |
666 | ||
667 | static void __exit kvm_s390_exit(void) | |
668 | { | |
669 | kvm_exit(); | |
670 | } | |
671 | ||
672 | module_init(kvm_s390_init); | |
673 | module_exit(kvm_s390_exit); |