Commit | Line | Data |
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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) }, | |
0eaeafa1 | 34 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
35 | { "exit_validity", VCPU_STAT(exit_validity) }, |
36 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
37 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
38 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
39 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
40 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
41 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f5e10b09 | 42 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b CO |
43 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
44 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, | |
45 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, | |
46 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
47 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
48 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
49 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
50 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
51 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
453423dc CB |
52 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
53 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
54 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
55 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
56 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
57 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
58 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
59 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
60 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
5288fbf0 CB |
61 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
62 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, | |
63 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
64 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
65 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
66 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
e28acfea | 67 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
b0c632db HC |
68 | { NULL } |
69 | }; | |
70 | ||
71 | ||
72 | /* Section: not file related */ | |
73 | void kvm_arch_hardware_enable(void *garbage) | |
74 | { | |
75 | /* every s390 is virtualization enabled ;-) */ | |
76 | } | |
77 | ||
78 | void kvm_arch_hardware_disable(void *garbage) | |
79 | { | |
80 | } | |
81 | ||
b0c632db HC |
82 | int kvm_arch_hardware_setup(void) |
83 | { | |
84 | return 0; | |
85 | } | |
86 | ||
87 | void kvm_arch_hardware_unsetup(void) | |
88 | { | |
89 | } | |
90 | ||
91 | void kvm_arch_check_processor_compat(void *rtn) | |
92 | { | |
93 | } | |
94 | ||
95 | int kvm_arch_init(void *opaque) | |
96 | { | |
97 | return 0; | |
98 | } | |
99 | ||
100 | void kvm_arch_exit(void) | |
101 | { | |
102 | } | |
103 | ||
104 | /* Section: device related */ | |
105 | long kvm_arch_dev_ioctl(struct file *filp, | |
106 | unsigned int ioctl, unsigned long arg) | |
107 | { | |
108 | if (ioctl == KVM_S390_ENABLE_SIE) | |
109 | return s390_enable_sie(); | |
110 | return -EINVAL; | |
111 | } | |
112 | ||
113 | int kvm_dev_ioctl_check_extension(long ext) | |
114 | { | |
2bd0ac4e | 115 | switch (ext) { |
2bd0ac4e CO |
116 | default: |
117 | return 0; | |
118 | } | |
b0c632db HC |
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 | ||
b0c632db HC |
186 | return kvm; |
187 | out_nodbf: | |
188 | free_page((unsigned long)(kvm->arch.sca)); | |
189 | out_nosca: | |
190 | kfree(kvm); | |
191 | out_nokvm: | |
192 | return ERR_PTR(rc); | |
193 | } | |
194 | ||
d329c035 CB |
195 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
196 | { | |
197 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
198 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
6692cef3 | 199 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
200 | kfree(vcpu); |
201 | } | |
202 | ||
203 | static void kvm_free_vcpus(struct kvm *kvm) | |
204 | { | |
205 | unsigned int i; | |
206 | ||
207 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
208 | if (kvm->vcpus[i]) { | |
209 | kvm_arch_vcpu_destroy(kvm->vcpus[i]); | |
210 | kvm->vcpus[i] = NULL; | |
211 | } | |
212 | } | |
213 | } | |
214 | ||
ad8ba2cd SY |
215 | void kvm_arch_sync_events(struct kvm *kvm) |
216 | { | |
217 | } | |
218 | ||
b0c632db HC |
219 | void kvm_arch_destroy_vm(struct kvm *kvm) |
220 | { | |
d329c035 | 221 | kvm_free_vcpus(kvm); |
dfdded7c | 222 | kvm_free_physmem(kvm); |
b0c632db | 223 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 224 | debug_unregister(kvm->arch.dbf); |
b0c632db | 225 | kfree(kvm); |
b0c632db HC |
226 | } |
227 | ||
228 | /* Section: vcpu related */ | |
229 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
230 | { | |
231 | return 0; | |
232 | } | |
233 | ||
234 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
235 | { | |
6692cef3 | 236 | /* Nothing todo */ |
b0c632db HC |
237 | } |
238 | ||
239 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
240 | { | |
241 | save_fp_regs(&vcpu->arch.host_fpregs); | |
242 | save_access_regs(vcpu->arch.host_acrs); | |
243 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
244 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
245 | restore_access_regs(vcpu->arch.guest_acrs); | |
b0c632db HC |
246 | } |
247 | ||
248 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
249 | { | |
250 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
251 | save_access_regs(vcpu->arch.guest_acrs); | |
252 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
253 | restore_access_regs(vcpu->arch.host_acrs); | |
254 | } | |
255 | ||
256 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
257 | { | |
258 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
259 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
260 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
261 | vcpu->arch.sie_block->prefix = 0UL; | |
262 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
263 | vcpu->arch.sie_block->cputm = 0UL; | |
264 | vcpu->arch.sie_block->ckc = 0UL; | |
265 | vcpu->arch.sie_block->todpr = 0; | |
266 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
267 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
268 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
269 | vcpu->arch.guest_fpregs.fpc = 0; | |
270 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
271 | vcpu->arch.sie_block->gbea = 1; | |
272 | } | |
273 | ||
4da29e90 CB |
274 | /* The current code can have up to 256 pages for virtio */ |
275 | #define VIRTIODESCSPACE (256ul * 4096ul) | |
276 | ||
b0c632db HC |
277 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
278 | { | |
279 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); | |
4da29e90 CB |
280 | vcpu->arch.sie_block->gmslm = vcpu->kvm->arch.guest_memsize + |
281 | vcpu->kvm->arch.guest_origin + | |
282 | VIRTIODESCSPACE - 1ul; | |
283 | vcpu->arch.sie_block->gmsor = vcpu->kvm->arch.guest_origin; | |
b0c632db HC |
284 | vcpu->arch.sie_block->ecb = 2; |
285 | vcpu->arch.sie_block->eca = 0xC1002001U; | |
ba5c1e9b CO |
286 | setup_timer(&vcpu->arch.ckc_timer, kvm_s390_idle_wakeup, |
287 | (unsigned long) vcpu); | |
453423dc CB |
288 | get_cpu_id(&vcpu->arch.cpu_id); |
289 | vcpu->arch.cpu_id.version = 0xfe; | |
b0c632db HC |
290 | return 0; |
291 | } | |
292 | ||
293 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
294 | unsigned int id) | |
295 | { | |
296 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
297 | int rc = -ENOMEM; | |
298 | ||
299 | if (!vcpu) | |
300 | goto out_nomem; | |
301 | ||
180c12fb CB |
302 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
303 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
304 | |
305 | if (!vcpu->arch.sie_block) | |
306 | goto out_free_cpu; | |
307 | ||
308 | vcpu->arch.sie_block->icpua = id; | |
309 | BUG_ON(!kvm->arch.sca); | |
310 | BUG_ON(kvm->arch.sca->cpu[id].sda); | |
311 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
312 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); | |
313 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
314 | ||
ba5c1e9b CO |
315 | spin_lock_init(&vcpu->arch.local_int.lock); |
316 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
317 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
318 | spin_lock_bh(&kvm->arch.float_int.lock); | |
319 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; | |
320 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 321 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b CO |
322 | spin_unlock_bh(&kvm->arch.float_int.lock); |
323 | ||
b0c632db HC |
324 | rc = kvm_vcpu_init(vcpu, kvm, id); |
325 | if (rc) | |
326 | goto out_free_cpu; | |
327 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, | |
328 | vcpu->arch.sie_block); | |
329 | ||
b0c632db HC |
330 | return vcpu; |
331 | out_free_cpu: | |
332 | kfree(vcpu); | |
333 | out_nomem: | |
334 | return ERR_PTR(rc); | |
335 | } | |
336 | ||
b0c632db HC |
337 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
338 | { | |
339 | /* kvm common code refers to this, but never calls it */ | |
340 | BUG(); | |
341 | return 0; | |
342 | } | |
343 | ||
344 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
345 | { | |
346 | vcpu_load(vcpu); | |
347 | kvm_s390_vcpu_initial_reset(vcpu); | |
348 | vcpu_put(vcpu); | |
349 | return 0; | |
350 | } | |
351 | ||
352 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
353 | { | |
354 | vcpu_load(vcpu); | |
355 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); | |
356 | vcpu_put(vcpu); | |
357 | return 0; | |
358 | } | |
359 | ||
360 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
361 | { | |
362 | vcpu_load(vcpu); | |
363 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); | |
364 | vcpu_put(vcpu); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
369 | struct kvm_sregs *sregs) | |
370 | { | |
371 | vcpu_load(vcpu); | |
372 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); | |
373 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
374 | vcpu_put(vcpu); | |
375 | return 0; | |
376 | } | |
377 | ||
378 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
379 | struct kvm_sregs *sregs) | |
380 | { | |
381 | vcpu_load(vcpu); | |
382 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); | |
383 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
384 | vcpu_put(vcpu); | |
385 | return 0; | |
386 | } | |
387 | ||
388 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
389 | { | |
390 | vcpu_load(vcpu); | |
391 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
392 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
393 | vcpu_put(vcpu); | |
394 | return 0; | |
395 | } | |
396 | ||
397 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
398 | { | |
399 | vcpu_load(vcpu); | |
400 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); | |
401 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
402 | vcpu_put(vcpu); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
407 | { | |
408 | int rc = 0; | |
409 | ||
410 | vcpu_load(vcpu); | |
411 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) | |
412 | rc = -EBUSY; | |
413 | else | |
414 | vcpu->arch.sie_block->gpsw = psw; | |
415 | vcpu_put(vcpu); | |
416 | return rc; | |
417 | } | |
418 | ||
419 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
420 | struct kvm_translation *tr) | |
421 | { | |
422 | return -EINVAL; /* not implemented yet */ | |
423 | } | |
424 | ||
425 | int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, | |
426 | struct kvm_debug_guest *dbg) | |
427 | { | |
428 | return -EINVAL; /* not implemented yet */ | |
429 | } | |
430 | ||
62d9f0db MT |
431 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
432 | struct kvm_mp_state *mp_state) | |
433 | { | |
434 | return -EINVAL; /* not implemented yet */ | |
435 | } | |
436 | ||
437 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
438 | struct kvm_mp_state *mp_state) | |
439 | { | |
440 | return -EINVAL; /* not implemented yet */ | |
441 | } | |
442 | ||
71cde587 CB |
443 | extern void s390_handle_mcck(void); |
444 | ||
b0c632db HC |
445 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
446 | { | |
447 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
448 | ||
449 | if (need_resched()) | |
450 | schedule(); | |
451 | ||
71cde587 CB |
452 | if (test_thread_flag(TIF_MCCK_PENDING)) |
453 | s390_handle_mcck(); | |
454 | ||
0ff31867 CO |
455 | kvm_s390_deliver_pending_interrupts(vcpu); |
456 | ||
b0c632db HC |
457 | vcpu->arch.sie_block->icptcode = 0; |
458 | local_irq_disable(); | |
459 | kvm_guest_enter(); | |
460 | local_irq_enable(); | |
461 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
462 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
1f0d0f09 CO |
463 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
464 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
465 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
466 | } | |
b0c632db HC |
467 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
468 | vcpu->arch.sie_block->icptcode); | |
469 | local_irq_disable(); | |
470 | kvm_guest_exit(); | |
471 | local_irq_enable(); | |
472 | ||
473 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
474 | } | |
475 | ||
476 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
477 | { | |
8f2abe6a | 478 | int rc; |
b0c632db HC |
479 | sigset_t sigsaved; |
480 | ||
481 | vcpu_load(vcpu); | |
482 | ||
483 | if (vcpu->sigset_active) | |
484 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
485 | ||
486 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
487 | ||
ba5c1e9b CO |
488 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
489 | ||
8f2abe6a CB |
490 | switch (kvm_run->exit_reason) { |
491 | case KVM_EXIT_S390_SIEIC: | |
492 | vcpu->arch.sie_block->gpsw.mask = kvm_run->s390_sieic.mask; | |
493 | vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr; | |
494 | break; | |
495 | case KVM_EXIT_UNKNOWN: | |
496 | case KVM_EXIT_S390_RESET: | |
497 | break; | |
498 | default: | |
499 | BUG(); | |
500 | } | |
501 | ||
502 | might_sleep(); | |
503 | ||
504 | do { | |
505 | __vcpu_run(vcpu); | |
8f2abe6a CB |
506 | rc = kvm_handle_sie_intercept(vcpu); |
507 | } while (!signal_pending(current) && !rc); | |
508 | ||
509 | if (signal_pending(current) && !rc) | |
510 | rc = -EINTR; | |
511 | ||
512 | if (rc == -ENOTSUPP) { | |
513 | /* intercept cannot be handled in-kernel, prepare kvm-run */ | |
514 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
515 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
516 | kvm_run->s390_sieic.mask = vcpu->arch.sie_block->gpsw.mask; | |
517 | kvm_run->s390_sieic.addr = vcpu->arch.sie_block->gpsw.addr; | |
518 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
519 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
520 | rc = 0; | |
521 | } | |
522 | ||
523 | if (rc == -EREMOTE) { | |
524 | /* intercept was handled, but userspace support is needed | |
525 | * kvm_run has been prepared by the handler */ | |
526 | rc = 0; | |
527 | } | |
b0c632db HC |
528 | |
529 | if (vcpu->sigset_active) | |
530 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
531 | ||
532 | vcpu_put(vcpu); | |
533 | ||
534 | vcpu->stat.exit_userspace++; | |
7e8e6ab4 | 535 | return rc; |
b0c632db HC |
536 | } |
537 | ||
538 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, | |
539 | unsigned long n, int prefix) | |
540 | { | |
541 | if (prefix) | |
542 | return copy_to_guest(vcpu, guestdest, from, n); | |
543 | else | |
544 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
545 | } | |
546 | ||
547 | /* | |
548 | * store status at address | |
549 | * we use have two special cases: | |
550 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
551 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
552 | */ | |
553 | int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
554 | { | |
555 | const unsigned char archmode = 1; | |
556 | int prefix; | |
557 | ||
558 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
559 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
560 | return -EFAULT; | |
561 | addr = SAVE_AREA_BASE; | |
562 | prefix = 0; | |
563 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
564 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
565 | return -EFAULT; | |
566 | addr = SAVE_AREA_BASE; | |
567 | prefix = 1; | |
568 | } else | |
569 | prefix = 0; | |
570 | ||
571 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, fp_regs), | |
572 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) | |
573 | return -EFAULT; | |
574 | ||
575 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, gp_regs), | |
576 | vcpu->arch.guest_gprs, 128, prefix)) | |
577 | return -EFAULT; | |
578 | ||
579 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, psw), | |
580 | &vcpu->arch.sie_block->gpsw, 16, prefix)) | |
581 | return -EFAULT; | |
582 | ||
583 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, pref_reg), | |
584 | &vcpu->arch.sie_block->prefix, 4, prefix)) | |
585 | return -EFAULT; | |
586 | ||
587 | if (__guestcopy(vcpu, | |
588 | addr + offsetof(struct save_area_s390x, fp_ctrl_reg), | |
589 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) | |
590 | return -EFAULT; | |
591 | ||
592 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, tod_reg), | |
593 | &vcpu->arch.sie_block->todpr, 4, prefix)) | |
594 | return -EFAULT; | |
595 | ||
596 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, timer), | |
597 | &vcpu->arch.sie_block->cputm, 8, prefix)) | |
598 | return -EFAULT; | |
599 | ||
600 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, clk_cmp), | |
601 | &vcpu->arch.sie_block->ckc, 8, prefix)) | |
602 | return -EFAULT; | |
603 | ||
604 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, acc_regs), | |
605 | &vcpu->arch.guest_acrs, 64, prefix)) | |
606 | return -EFAULT; | |
607 | ||
608 | if (__guestcopy(vcpu, | |
609 | addr + offsetof(struct save_area_s390x, ctrl_regs), | |
610 | &vcpu->arch.sie_block->gcr, 128, prefix)) | |
611 | return -EFAULT; | |
612 | return 0; | |
613 | } | |
614 | ||
615 | static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
616 | { | |
617 | int rc; | |
618 | ||
619 | vcpu_load(vcpu); | |
620 | rc = __kvm_s390_vcpu_store_status(vcpu, addr); | |
621 | vcpu_put(vcpu); | |
622 | return rc; | |
623 | } | |
624 | ||
625 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
626 | unsigned int ioctl, unsigned long arg) | |
627 | { | |
628 | struct kvm_vcpu *vcpu = filp->private_data; | |
629 | void __user *argp = (void __user *)arg; | |
630 | ||
631 | switch (ioctl) { | |
ba5c1e9b CO |
632 | case KVM_S390_INTERRUPT: { |
633 | struct kvm_s390_interrupt s390int; | |
634 | ||
635 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
636 | return -EFAULT; | |
637 | return kvm_s390_inject_vcpu(vcpu, &s390int); | |
638 | } | |
b0c632db HC |
639 | case KVM_S390_STORE_STATUS: |
640 | return kvm_s390_vcpu_store_status(vcpu, arg); | |
641 | case KVM_S390_SET_INITIAL_PSW: { | |
642 | psw_t psw; | |
643 | ||
644 | if (copy_from_user(&psw, argp, sizeof(psw))) | |
645 | return -EFAULT; | |
646 | return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
647 | } | |
648 | case KVM_S390_INITIAL_RESET: | |
649 | return kvm_arch_vcpu_ioctl_initial_reset(vcpu); | |
650 | default: | |
651 | ; | |
652 | } | |
653 | return -EINVAL; | |
654 | } | |
655 | ||
656 | /* Section: memory related */ | |
657 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
658 | struct kvm_userspace_memory_region *mem, | |
659 | struct kvm_memory_slot old, | |
660 | int user_alloc) | |
661 | { | |
662 | /* A few sanity checks. We can have exactly one memory slot which has | |
663 | to start at guest virtual zero and which has to be located at a | |
664 | page boundary in userland and which has to end at a page boundary. | |
665 | The memory in userland is ok to be fragmented into various different | |
666 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
667 | doing this call at any time */ | |
668 | ||
669 | if (mem->slot) | |
670 | return -EINVAL; | |
671 | ||
672 | if (mem->guest_phys_addr) | |
673 | return -EINVAL; | |
674 | ||
675 | if (mem->userspace_addr & (PAGE_SIZE - 1)) | |
676 | return -EINVAL; | |
677 | ||
678 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
679 | return -EINVAL; | |
680 | ||
681 | kvm->arch.guest_origin = mem->userspace_addr; | |
682 | kvm->arch.guest_memsize = mem->memory_size; | |
683 | ||
684 | /* FIXME: we do want to interrupt running CPUs and update their memory | |
685 | configuration now to avoid race conditions. But hey, changing the | |
686 | memory layout while virtual CPUs are running is usually bad | |
687 | programming practice. */ | |
688 | ||
689 | return 0; | |
690 | } | |
691 | ||
34d4cb8f MT |
692 | void kvm_arch_flush_shadow(struct kvm *kvm) |
693 | { | |
694 | } | |
695 | ||
b0c632db HC |
696 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
697 | { | |
698 | return gfn; | |
699 | } | |
700 | ||
701 | static int __init kvm_s390_init(void) | |
702 | { | |
703 | return kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE); | |
704 | } | |
705 | ||
706 | static void __exit kvm_s390_exit(void) | |
707 | { | |
708 | kvm_exit(); | |
709 | } | |
710 | ||
711 | module_init(kvm_s390_init); | |
712 | module_exit(kvm_s390_exit); |