Root/
1 | /* |
2 | * s390host.c -- hosting zSeries kernel virtual machines |
3 | * |
4 | * Copyright IBM Corp. 2008,2009 |
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 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
14 | */ |
15 | |
16 | #include <linux/compiler.h> |
17 | #include <linux/err.h> |
18 | #include <linux/fs.h> |
19 | #include <linux/hrtimer.h> |
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> |
25 | #include <linux/timer.h> |
26 | #include <asm/asm-offsets.h> |
27 | #include <asm/lowcore.h> |
28 | #include <asm/pgtable.h> |
29 | #include <asm/nmi.h> |
30 | #include <asm/system.h> |
31 | #include "kvm-s390.h" |
32 | #include "gaccess.h" |
33 | |
34 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
35 | |
36 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
37 | { "userspace_handled", VCPU_STAT(exit_userspace) }, |
38 | { "exit_null", VCPU_STAT(exit_null) }, |
39 | { "exit_validity", VCPU_STAT(exit_validity) }, |
40 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, |
41 | { "exit_external_request", VCPU_STAT(exit_external_request) }, |
42 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, |
43 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
44 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, |
45 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, |
46 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
47 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
48 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, |
49 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
50 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, |
51 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, |
52 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, |
53 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, |
54 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, |
55 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, |
56 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
57 | { "instruction_spx", VCPU_STAT(instruction_spx) }, |
58 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, |
59 | { "instruction_stap", VCPU_STAT(instruction_stap) }, |
60 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, |
61 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, |
62 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, |
63 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
64 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, |
65 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
66 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
67 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, |
68 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, |
69 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, |
70 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, |
71 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
72 | { NULL } |
73 | }; |
74 | |
75 | static unsigned long long *facilities; |
76 | |
77 | /* Section: not file related */ |
78 | int kvm_arch_hardware_enable(void *garbage) |
79 | { |
80 | /* every s390 is virtualization enabled ;-) */ |
81 | return 0; |
82 | } |
83 | |
84 | void kvm_arch_hardware_disable(void *garbage) |
85 | { |
86 | } |
87 | |
88 | int kvm_arch_hardware_setup(void) |
89 | { |
90 | return 0; |
91 | } |
92 | |
93 | void kvm_arch_hardware_unsetup(void) |
94 | { |
95 | } |
96 | |
97 | void kvm_arch_check_processor_compat(void *rtn) |
98 | { |
99 | } |
100 | |
101 | int kvm_arch_init(void *opaque) |
102 | { |
103 | return 0; |
104 | } |
105 | |
106 | void kvm_arch_exit(void) |
107 | { |
108 | } |
109 | |
110 | /* Section: device related */ |
111 | long kvm_arch_dev_ioctl(struct file *filp, |
112 | unsigned int ioctl, unsigned long arg) |
113 | { |
114 | if (ioctl == KVM_S390_ENABLE_SIE) |
115 | return s390_enable_sie(); |
116 | return -EINVAL; |
117 | } |
118 | |
119 | int kvm_dev_ioctl_check_extension(long ext) |
120 | { |
121 | int r; |
122 | |
123 | switch (ext) { |
124 | case KVM_CAP_S390_PSW: |
125 | r = 1; |
126 | break; |
127 | default: |
128 | r = 0; |
129 | } |
130 | return r; |
131 | } |
132 | |
133 | /* Section: vm related */ |
134 | /* |
135 | * Get (and clear) the dirty memory log for a memory slot. |
136 | */ |
137 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
138 | struct kvm_dirty_log *log) |
139 | { |
140 | return 0; |
141 | } |
142 | |
143 | long kvm_arch_vm_ioctl(struct file *filp, |
144 | unsigned int ioctl, unsigned long arg) |
145 | { |
146 | struct kvm *kvm = filp->private_data; |
147 | void __user *argp = (void __user *)arg; |
148 | int r; |
149 | |
150 | switch (ioctl) { |
151 | case KVM_S390_INTERRUPT: { |
152 | struct kvm_s390_interrupt s390int; |
153 | |
154 | r = -EFAULT; |
155 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
156 | break; |
157 | r = kvm_s390_inject_vm(kvm, &s390int); |
158 | break; |
159 | } |
160 | default: |
161 | r = -ENOTTY; |
162 | } |
163 | |
164 | return r; |
165 | } |
166 | |
167 | struct kvm *kvm_arch_create_vm(void) |
168 | { |
169 | struct kvm *kvm; |
170 | int rc; |
171 | char debug_name[16]; |
172 | |
173 | rc = s390_enable_sie(); |
174 | if (rc) |
175 | goto out_nokvm; |
176 | |
177 | rc = -ENOMEM; |
178 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); |
179 | if (!kvm) |
180 | goto out_nokvm; |
181 | |
182 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
183 | if (!kvm->arch.sca) |
184 | goto out_nosca; |
185 | |
186 | sprintf(debug_name, "kvm-%u", current->pid); |
187 | |
188 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); |
189 | if (!kvm->arch.dbf) |
190 | goto out_nodbf; |
191 | |
192 | spin_lock_init(&kvm->arch.float_int.lock); |
193 | INIT_LIST_HEAD(&kvm->arch.float_int.list); |
194 | |
195 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
196 | VM_EVENT(kvm, 3, "%s", "vm created"); |
197 | |
198 | return kvm; |
199 | out_nodbf: |
200 | free_page((unsigned long)(kvm->arch.sca)); |
201 | out_nosca: |
202 | kfree(kvm); |
203 | out_nokvm: |
204 | return ERR_PTR(rc); |
205 | } |
206 | |
207 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
208 | { |
209 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); |
210 | clear_bit(63 - vcpu->vcpu_id, (unsigned long *) &vcpu->kvm->arch.sca->mcn); |
211 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
212 | (__u64) vcpu->arch.sie_block) |
213 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; |
214 | smp_mb(); |
215 | free_page((unsigned long)(vcpu->arch.sie_block)); |
216 | kvm_vcpu_uninit(vcpu); |
217 | kfree(vcpu); |
218 | } |
219 | |
220 | static void kvm_free_vcpus(struct kvm *kvm) |
221 | { |
222 | unsigned int i; |
223 | struct kvm_vcpu *vcpu; |
224 | |
225 | kvm_for_each_vcpu(i, vcpu, kvm) |
226 | kvm_arch_vcpu_destroy(vcpu); |
227 | |
228 | mutex_lock(&kvm->lock); |
229 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) |
230 | kvm->vcpus[i] = NULL; |
231 | |
232 | atomic_set(&kvm->online_vcpus, 0); |
233 | mutex_unlock(&kvm->lock); |
234 | } |
235 | |
236 | void kvm_arch_sync_events(struct kvm *kvm) |
237 | { |
238 | } |
239 | |
240 | void kvm_arch_destroy_vm(struct kvm *kvm) |
241 | { |
242 | kvm_free_vcpus(kvm); |
243 | kvm_free_physmem(kvm); |
244 | free_page((unsigned long)(kvm->arch.sca)); |
245 | debug_unregister(kvm->arch.dbf); |
246 | cleanup_srcu_struct(&kvm->srcu); |
247 | kfree(kvm); |
248 | } |
249 | |
250 | /* Section: vcpu related */ |
251 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
252 | { |
253 | return 0; |
254 | } |
255 | |
256 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) |
257 | { |
258 | /* Nothing todo */ |
259 | } |
260 | |
261 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
262 | { |
263 | save_fp_regs(&vcpu->arch.host_fpregs); |
264 | save_access_regs(vcpu->arch.host_acrs); |
265 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; |
266 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
267 | restore_access_regs(vcpu->arch.guest_acrs); |
268 | } |
269 | |
270 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
271 | { |
272 | save_fp_regs(&vcpu->arch.guest_fpregs); |
273 | save_access_regs(vcpu->arch.guest_acrs); |
274 | restore_fp_regs(&vcpu->arch.host_fpregs); |
275 | restore_access_regs(vcpu->arch.host_acrs); |
276 | } |
277 | |
278 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) |
279 | { |
280 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ |
281 | vcpu->arch.sie_block->gpsw.mask = 0UL; |
282 | vcpu->arch.sie_block->gpsw.addr = 0UL; |
283 | vcpu->arch.sie_block->prefix = 0UL; |
284 | vcpu->arch.sie_block->ihcpu = 0xffff; |
285 | vcpu->arch.sie_block->cputm = 0UL; |
286 | vcpu->arch.sie_block->ckc = 0UL; |
287 | vcpu->arch.sie_block->todpr = 0; |
288 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); |
289 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; |
290 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; |
291 | vcpu->arch.guest_fpregs.fpc = 0; |
292 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); |
293 | vcpu->arch.sie_block->gbea = 1; |
294 | } |
295 | |
296 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
297 | { |
298 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); |
299 | set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests); |
300 | vcpu->arch.sie_block->ecb = 6; |
301 | vcpu->arch.sie_block->eca = 0xC1002001U; |
302 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
303 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
304 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, |
305 | (unsigned long) vcpu); |
306 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; |
307 | get_cpu_id(&vcpu->arch.cpu_id); |
308 | vcpu->arch.cpu_id.version = 0xff; |
309 | return 0; |
310 | } |
311 | |
312 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, |
313 | unsigned int id) |
314 | { |
315 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
316 | int rc = -ENOMEM; |
317 | |
318 | if (!vcpu) |
319 | goto out_nomem; |
320 | |
321 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
322 | get_zeroed_page(GFP_KERNEL); |
323 | |
324 | if (!vcpu->arch.sie_block) |
325 | goto out_free_cpu; |
326 | |
327 | vcpu->arch.sie_block->icpua = id; |
328 | BUG_ON(!kvm->arch.sca); |
329 | if (!kvm->arch.sca->cpu[id].sda) |
330 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; |
331 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
332 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; |
333 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); |
334 | |
335 | spin_lock_init(&vcpu->arch.local_int.lock); |
336 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); |
337 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; |
338 | spin_lock(&kvm->arch.float_int.lock); |
339 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
340 | init_waitqueue_head(&vcpu->arch.local_int.wq); |
341 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
342 | spin_unlock(&kvm->arch.float_int.lock); |
343 | |
344 | rc = kvm_vcpu_init(vcpu, kvm, id); |
345 | if (rc) |
346 | goto out_free_sie_block; |
347 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
348 | vcpu->arch.sie_block); |
349 | |
350 | return vcpu; |
351 | out_free_sie_block: |
352 | free_page((unsigned long)(vcpu->arch.sie_block)); |
353 | out_free_cpu: |
354 | kfree(vcpu); |
355 | out_nomem: |
356 | return ERR_PTR(rc); |
357 | } |
358 | |
359 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
360 | { |
361 | /* kvm common code refers to this, but never calls it */ |
362 | BUG(); |
363 | return 0; |
364 | } |
365 | |
366 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
367 | { |
368 | kvm_s390_vcpu_initial_reset(vcpu); |
369 | return 0; |
370 | } |
371 | |
372 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
373 | { |
374 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); |
375 | return 0; |
376 | } |
377 | |
378 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) |
379 | { |
380 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); |
381 | return 0; |
382 | } |
383 | |
384 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
385 | struct kvm_sregs *sregs) |
386 | { |
387 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); |
388 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
389 | return 0; |
390 | } |
391 | |
392 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
393 | struct kvm_sregs *sregs) |
394 | { |
395 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); |
396 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
397 | return 0; |
398 | } |
399 | |
400 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
401 | { |
402 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
403 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
404 | return 0; |
405 | } |
406 | |
407 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
408 | { |
409 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
410 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; |
411 | return 0; |
412 | } |
413 | |
414 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) |
415 | { |
416 | int rc = 0; |
417 | |
418 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) |
419 | rc = -EBUSY; |
420 | else { |
421 | vcpu->run->psw_mask = psw.mask; |
422 | vcpu->run->psw_addr = psw.addr; |
423 | } |
424 | return rc; |
425 | } |
426 | |
427 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
428 | struct kvm_translation *tr) |
429 | { |
430 | return -EINVAL; /* not implemented yet */ |
431 | } |
432 | |
433 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
434 | struct kvm_guest_debug *dbg) |
435 | { |
436 | return -EINVAL; /* not implemented yet */ |
437 | } |
438 | |
439 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
440 | struct kvm_mp_state *mp_state) |
441 | { |
442 | return -EINVAL; /* not implemented yet */ |
443 | } |
444 | |
445 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
446 | struct kvm_mp_state *mp_state) |
447 | { |
448 | return -EINVAL; /* not implemented yet */ |
449 | } |
450 | |
451 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
452 | { |
453 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); |
454 | |
455 | if (need_resched()) |
456 | schedule(); |
457 | |
458 | if (test_thread_flag(TIF_MCCK_PENDING)) |
459 | s390_handle_mcck(); |
460 | |
461 | kvm_s390_deliver_pending_interrupts(vcpu); |
462 | |
463 | vcpu->arch.sie_block->icptcode = 0; |
464 | local_irq_disable(); |
465 | kvm_guest_enter(); |
466 | local_irq_enable(); |
467 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", |
468 | atomic_read(&vcpu->arch.sie_block->cpuflags)); |
469 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
470 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
471 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
472 | } |
473 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
474 | vcpu->arch.sie_block->icptcode); |
475 | local_irq_disable(); |
476 | kvm_guest_exit(); |
477 | local_irq_enable(); |
478 | |
479 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); |
480 | } |
481 | |
482 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
483 | { |
484 | int rc; |
485 | sigset_t sigsaved; |
486 | |
487 | rerun_vcpu: |
488 | if (vcpu->requests) |
489 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) |
490 | kvm_s390_vcpu_set_mem(vcpu); |
491 | |
492 | /* verify, that memory has been registered */ |
493 | if (!vcpu->arch.sie_block->gmslm) { |
494 | vcpu_put(vcpu); |
495 | VCPU_EVENT(vcpu, 3, "%s", "no memory registered to run vcpu"); |
496 | return -EINVAL; |
497 | } |
498 | |
499 | if (vcpu->sigset_active) |
500 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); |
501 | |
502 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
503 | |
504 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
505 | |
506 | switch (kvm_run->exit_reason) { |
507 | case KVM_EXIT_S390_SIEIC: |
508 | case KVM_EXIT_UNKNOWN: |
509 | case KVM_EXIT_INTR: |
510 | case KVM_EXIT_S390_RESET: |
511 | break; |
512 | default: |
513 | BUG(); |
514 | } |
515 | |
516 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
517 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; |
518 | |
519 | might_fault(); |
520 | |
521 | do { |
522 | __vcpu_run(vcpu); |
523 | rc = kvm_handle_sie_intercept(vcpu); |
524 | } while (!signal_pending(current) && !rc); |
525 | |
526 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
527 | goto rerun_vcpu; |
528 | |
529 | if (signal_pending(current) && !rc) { |
530 | kvm_run->exit_reason = KVM_EXIT_INTR; |
531 | rc = -EINTR; |
532 | } |
533 | |
534 | if (rc == -EOPNOTSUPP) { |
535 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
536 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; |
537 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; |
538 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
539 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; |
540 | rc = 0; |
541 | } |
542 | |
543 | if (rc == -EREMOTE) { |
544 | /* intercept was handled, but userspace support is needed |
545 | * kvm_run has been prepared by the handler */ |
546 | rc = 0; |
547 | } |
548 | |
549 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
550 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; |
551 | |
552 | if (vcpu->sigset_active) |
553 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
554 | |
555 | vcpu->stat.exit_userspace++; |
556 | return rc; |
557 | } |
558 | |
559 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, |
560 | unsigned long n, int prefix) |
561 | { |
562 | if (prefix) |
563 | return copy_to_guest(vcpu, guestdest, from, n); |
564 | else |
565 | return copy_to_guest_absolute(vcpu, guestdest, from, n); |
566 | } |
567 | |
568 | /* |
569 | * store status at address |
570 | * we use have two special cases: |
571 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit |
572 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix |
573 | */ |
574 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
575 | { |
576 | const unsigned char archmode = 1; |
577 | int prefix; |
578 | |
579 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { |
580 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) |
581 | return -EFAULT; |
582 | addr = SAVE_AREA_BASE; |
583 | prefix = 0; |
584 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { |
585 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) |
586 | return -EFAULT; |
587 | addr = SAVE_AREA_BASE; |
588 | prefix = 1; |
589 | } else |
590 | prefix = 0; |
591 | |
592 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
593 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
594 | return -EFAULT; |
595 | |
596 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
597 | vcpu->arch.guest_gprs, 128, prefix)) |
598 | return -EFAULT; |
599 | |
600 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
601 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
602 | return -EFAULT; |
603 | |
604 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
605 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
606 | return -EFAULT; |
607 | |
608 | if (__guestcopy(vcpu, |
609 | addr + offsetof(struct save_area, fp_ctrl_reg), |
610 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
611 | return -EFAULT; |
612 | |
613 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
614 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
615 | return -EFAULT; |
616 | |
617 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
618 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
619 | return -EFAULT; |
620 | |
621 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
622 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
623 | return -EFAULT; |
624 | |
625 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
626 | &vcpu->arch.guest_acrs, 64, prefix)) |
627 | return -EFAULT; |
628 | |
629 | if (__guestcopy(vcpu, |
630 | addr + offsetof(struct save_area, ctrl_regs), |
631 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
632 | return -EFAULT; |
633 | return 0; |
634 | } |
635 | |
636 | long kvm_arch_vcpu_ioctl(struct file *filp, |
637 | unsigned int ioctl, unsigned long arg) |
638 | { |
639 | struct kvm_vcpu *vcpu = filp->private_data; |
640 | void __user *argp = (void __user *)arg; |
641 | long r; |
642 | |
643 | switch (ioctl) { |
644 | case KVM_S390_INTERRUPT: { |
645 | struct kvm_s390_interrupt s390int; |
646 | |
647 | r = -EFAULT; |
648 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
649 | break; |
650 | r = kvm_s390_inject_vcpu(vcpu, &s390int); |
651 | break; |
652 | } |
653 | case KVM_S390_STORE_STATUS: |
654 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
655 | break; |
656 | case KVM_S390_SET_INITIAL_PSW: { |
657 | psw_t psw; |
658 | |
659 | r = -EFAULT; |
660 | if (copy_from_user(&psw, argp, sizeof(psw))) |
661 | break; |
662 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); |
663 | break; |
664 | } |
665 | case KVM_S390_INITIAL_RESET: |
666 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
667 | break; |
668 | default: |
669 | r = -EINVAL; |
670 | } |
671 | return r; |
672 | } |
673 | |
674 | /* Section: memory related */ |
675 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
676 | struct kvm_memory_slot *memslot, |
677 | struct kvm_memory_slot old, |
678 | struct kvm_userspace_memory_region *mem, |
679 | int user_alloc) |
680 | { |
681 | /* A few sanity checks. We can have exactly one memory slot which has |
682 | to start at guest virtual zero and which has to be located at a |
683 | page boundary in userland and which has to end at a page boundary. |
684 | The memory in userland is ok to be fragmented into various different |
685 | vmas. It is okay to mmap() and munmap() stuff in this slot after |
686 | doing this call at any time */ |
687 | |
688 | if (mem->slot) |
689 | return -EINVAL; |
690 | |
691 | if (mem->guest_phys_addr) |
692 | return -EINVAL; |
693 | |
694 | if (mem->userspace_addr & (PAGE_SIZE - 1)) |
695 | return -EINVAL; |
696 | |
697 | if (mem->memory_size & (PAGE_SIZE - 1)) |
698 | return -EINVAL; |
699 | |
700 | if (!user_alloc) |
701 | return -EINVAL; |
702 | |
703 | return 0; |
704 | } |
705 | |
706 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
707 | struct kvm_userspace_memory_region *mem, |
708 | struct kvm_memory_slot old, |
709 | int user_alloc) |
710 | { |
711 | int i; |
712 | struct kvm_vcpu *vcpu; |
713 | |
714 | /* request update of sie control block for all available vcpus */ |
715 | kvm_for_each_vcpu(i, vcpu, kvm) { |
716 | if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) |
717 | continue; |
718 | kvm_s390_inject_sigp_stop(vcpu, ACTION_RELOADVCPU_ON_STOP); |
719 | } |
720 | } |
721 | |
722 | void kvm_arch_flush_shadow(struct kvm *kvm) |
723 | { |
724 | } |
725 | |
726 | static int __init kvm_s390_init(void) |
727 | { |
728 | int ret; |
729 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
730 | if (ret) |
731 | return ret; |
732 | |
733 | /* |
734 | * guests can ask for up to 255+1 double words, we need a full page |
735 | * to hold the maximum amount of facilites. On the other hand, we |
736 | * only set facilities that are known to work in KVM. |
737 | */ |
738 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
739 | if (!facilities) { |
740 | kvm_exit(); |
741 | return -ENOMEM; |
742 | } |
743 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
744 | facilities[0] &= 0xff00fff3f47c0000ULL; |
745 | return 0; |
746 | } |
747 | |
748 | static void __exit kvm_s390_exit(void) |
749 | { |
750 | free_page((unsigned long) facilities); |
751 | kvm_exit(); |
752 | } |
753 | |
754 | module_init(kvm_s390_init); |
755 | module_exit(kvm_s390_exit); |
756 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9