Commit | Line | Data |
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b0c632db HC |
1 | /* |
2 | * s390host.c -- hosting zSeries kernel virtual machines | |
3 | * | |
628eb9b8 | 4 | * Copyright IBM Corp. 2008,2009 |
b0c632db HC |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
b0c632db HC |
14 | */ |
15 | ||
16 | #include <linux/compiler.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/fs.h> | |
ca872302 | 19 | #include <linux/hrtimer.h> |
b0c632db HC |
20 | #include <linux/init.h> |
21 | #include <linux/kvm.h> | |
22 | #include <linux/kvm_host.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/slab.h> | |
ba5c1e9b | 25 | #include <linux/timer.h> |
b0c632db HC |
26 | #include <asm/lowcore.h> |
27 | #include <asm/pgtable.h> | |
f5daba1d | 28 | #include <asm/nmi.h> |
ef50f7ac | 29 | #include <asm/system.h> |
8f2abe6a | 30 | #include "kvm-s390.h" |
b0c632db HC |
31 | #include "gaccess.h" |
32 | ||
33 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
34 | ||
35 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
36 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 37 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
38 | { "exit_validity", VCPU_STAT(exit_validity) }, |
39 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
40 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
41 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
42 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
43 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
44 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f5e10b09 | 45 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b CO |
46 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
47 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, | |
48 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, | |
49 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
50 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
51 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
52 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
53 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
54 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
453423dc CB |
55 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
56 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
57 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
58 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
59 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
60 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
61 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
62 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
63 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
5288fbf0 CB |
64 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
65 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, | |
66 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
67 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
68 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
69 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
e28acfea | 70 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
b0c632db HC |
71 | { NULL } |
72 | }; | |
73 | ||
ef50f7ac | 74 | static unsigned long long *facilities; |
b0c632db HC |
75 | |
76 | /* Section: not file related */ | |
77 | void kvm_arch_hardware_enable(void *garbage) | |
78 | { | |
79 | /* every s390 is virtualization enabled ;-) */ | |
80 | } | |
81 | ||
82 | void kvm_arch_hardware_disable(void *garbage) | |
83 | { | |
84 | } | |
85 | ||
b0c632db HC |
86 | int kvm_arch_hardware_setup(void) |
87 | { | |
88 | return 0; | |
89 | } | |
90 | ||
91 | void kvm_arch_hardware_unsetup(void) | |
92 | { | |
93 | } | |
94 | ||
95 | void kvm_arch_check_processor_compat(void *rtn) | |
96 | { | |
97 | } | |
98 | ||
99 | int kvm_arch_init(void *opaque) | |
100 | { | |
101 | return 0; | |
102 | } | |
103 | ||
104 | void kvm_arch_exit(void) | |
105 | { | |
106 | } | |
107 | ||
108 | /* Section: device related */ | |
109 | long kvm_arch_dev_ioctl(struct file *filp, | |
110 | unsigned int ioctl, unsigned long arg) | |
111 | { | |
112 | if (ioctl == KVM_S390_ENABLE_SIE) | |
113 | return s390_enable_sie(); | |
114 | return -EINVAL; | |
115 | } | |
116 | ||
117 | int kvm_dev_ioctl_check_extension(long ext) | |
118 | { | |
2bd0ac4e | 119 | switch (ext) { |
2bd0ac4e CO |
120 | default: |
121 | return 0; | |
122 | } | |
b0c632db HC |
123 | } |
124 | ||
125 | /* Section: vm related */ | |
126 | /* | |
127 | * Get (and clear) the dirty memory log for a memory slot. | |
128 | */ | |
129 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
130 | struct kvm_dirty_log *log) | |
131 | { | |
132 | return 0; | |
133 | } | |
134 | ||
135 | long kvm_arch_vm_ioctl(struct file *filp, | |
136 | unsigned int ioctl, unsigned long arg) | |
137 | { | |
138 | struct kvm *kvm = filp->private_data; | |
139 | void __user *argp = (void __user *)arg; | |
140 | int r; | |
141 | ||
142 | switch (ioctl) { | |
ba5c1e9b CO |
143 | case KVM_S390_INTERRUPT: { |
144 | struct kvm_s390_interrupt s390int; | |
145 | ||
146 | r = -EFAULT; | |
147 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
148 | break; | |
149 | r = kvm_s390_inject_vm(kvm, &s390int); | |
150 | break; | |
151 | } | |
b0c632db | 152 | default: |
367e1319 | 153 | r = -ENOTTY; |
b0c632db HC |
154 | } |
155 | ||
156 | return r; | |
157 | } | |
158 | ||
159 | struct kvm *kvm_arch_create_vm(void) | |
160 | { | |
161 | struct kvm *kvm; | |
162 | int rc; | |
163 | char debug_name[16]; | |
164 | ||
165 | rc = s390_enable_sie(); | |
166 | if (rc) | |
167 | goto out_nokvm; | |
168 | ||
169 | rc = -ENOMEM; | |
170 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
171 | if (!kvm) | |
172 | goto out_nokvm; | |
173 | ||
174 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); | |
175 | if (!kvm->arch.sca) | |
176 | goto out_nosca; | |
177 | ||
178 | sprintf(debug_name, "kvm-%u", current->pid); | |
179 | ||
180 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
181 | if (!kvm->arch.dbf) | |
182 | goto out_nodbf; | |
183 | ||
ba5c1e9b CO |
184 | spin_lock_init(&kvm->arch.float_int.lock); |
185 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
186 | ||
b0c632db HC |
187 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
188 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
189 | ||
b0c632db HC |
190 | return kvm; |
191 | out_nodbf: | |
192 | free_page((unsigned long)(kvm->arch.sca)); | |
193 | out_nosca: | |
194 | kfree(kvm); | |
195 | out_nokvm: | |
196 | return ERR_PTR(rc); | |
197 | } | |
198 | ||
d329c035 CB |
199 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
200 | { | |
201 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
abf4a71e CO |
202 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
203 | (__u64) vcpu->arch.sie_block) | |
204 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
205 | smp_mb(); | |
d329c035 | 206 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 207 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
208 | kfree(vcpu); |
209 | } | |
210 | ||
211 | static void kvm_free_vcpus(struct kvm *kvm) | |
212 | { | |
213 | unsigned int i; | |
988a2cae | 214 | struct kvm_vcpu *vcpu; |
d329c035 | 215 | |
988a2cae GN |
216 | kvm_for_each_vcpu(i, vcpu, kvm) |
217 | kvm_arch_vcpu_destroy(vcpu); | |
218 | ||
219 | mutex_lock(&kvm->lock); | |
220 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
221 | kvm->vcpus[i] = NULL; | |
222 | ||
223 | atomic_set(&kvm->online_vcpus, 0); | |
224 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
225 | } |
226 | ||
ad8ba2cd SY |
227 | void kvm_arch_sync_events(struct kvm *kvm) |
228 | { | |
229 | } | |
230 | ||
b0c632db HC |
231 | void kvm_arch_destroy_vm(struct kvm *kvm) |
232 | { | |
d329c035 | 233 | kvm_free_vcpus(kvm); |
dfdded7c | 234 | kvm_free_physmem(kvm); |
b0c632db | 235 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 236 | debug_unregister(kvm->arch.dbf); |
b0c632db | 237 | kfree(kvm); |
b0c632db HC |
238 | } |
239 | ||
240 | /* Section: vcpu related */ | |
241 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
242 | { | |
243 | return 0; | |
244 | } | |
245 | ||
246 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
247 | { | |
6692cef3 | 248 | /* Nothing todo */ |
b0c632db HC |
249 | } |
250 | ||
251 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
252 | { | |
253 | save_fp_regs(&vcpu->arch.host_fpregs); | |
254 | save_access_regs(vcpu->arch.host_acrs); | |
255 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
256 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
257 | restore_access_regs(vcpu->arch.guest_acrs); | |
b0c632db HC |
258 | } |
259 | ||
260 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
261 | { | |
262 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
263 | save_access_regs(vcpu->arch.guest_acrs); | |
264 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
265 | restore_access_regs(vcpu->arch.host_acrs); | |
266 | } | |
267 | ||
268 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
269 | { | |
270 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
271 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
272 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
273 | vcpu->arch.sie_block->prefix = 0UL; | |
274 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
275 | vcpu->arch.sie_block->cputm = 0UL; | |
276 | vcpu->arch.sie_block->ckc = 0UL; | |
277 | vcpu->arch.sie_block->todpr = 0; | |
278 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
279 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
280 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
281 | vcpu->arch.guest_fpregs.fpc = 0; | |
282 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
283 | vcpu->arch.sie_block->gbea = 1; | |
284 | } | |
285 | ||
286 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
287 | { | |
288 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); | |
628eb9b8 | 289 | set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests); |
b0c632db HC |
290 | vcpu->arch.sie_block->ecb = 2; |
291 | vcpu->arch.sie_block->eca = 0xC1002001U; | |
ef50f7ac | 292 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
293 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
294 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
295 | (unsigned long) vcpu); | |
296 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 297 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 298 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
299 | return 0; |
300 | } | |
301 | ||
302 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
303 | unsigned int id) | |
304 | { | |
305 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
306 | int rc = -ENOMEM; | |
307 | ||
308 | if (!vcpu) | |
309 | goto out_nomem; | |
310 | ||
180c12fb CB |
311 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
312 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
313 | |
314 | if (!vcpu->arch.sie_block) | |
315 | goto out_free_cpu; | |
316 | ||
317 | vcpu->arch.sie_block->icpua = id; | |
318 | BUG_ON(!kvm->arch.sca); | |
abf4a71e CO |
319 | if (!kvm->arch.sca->cpu[id].sda) |
320 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
b0c632db HC |
321 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
322 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
323 | ||
ba5c1e9b CO |
324 | spin_lock_init(&vcpu->arch.local_int.lock); |
325 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
326 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 327 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
328 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
329 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 330 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 331 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 332 | |
b0c632db HC |
333 | rc = kvm_vcpu_init(vcpu, kvm, id); |
334 | if (rc) | |
335 | goto out_free_cpu; | |
336 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, | |
337 | vcpu->arch.sie_block); | |
338 | ||
b0c632db HC |
339 | return vcpu; |
340 | out_free_cpu: | |
341 | kfree(vcpu); | |
342 | out_nomem: | |
343 | return ERR_PTR(rc); | |
344 | } | |
345 | ||
b0c632db HC |
346 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
347 | { | |
348 | /* kvm common code refers to this, but never calls it */ | |
349 | BUG(); | |
350 | return 0; | |
351 | } | |
352 | ||
353 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
354 | { | |
355 | vcpu_load(vcpu); | |
356 | kvm_s390_vcpu_initial_reset(vcpu); | |
357 | vcpu_put(vcpu); | |
358 | return 0; | |
359 | } | |
360 | ||
361 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
362 | { | |
363 | vcpu_load(vcpu); | |
364 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); | |
365 | vcpu_put(vcpu); | |
366 | return 0; | |
367 | } | |
368 | ||
369 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
370 | { | |
371 | vcpu_load(vcpu); | |
372 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); | |
373 | vcpu_put(vcpu); | |
374 | return 0; | |
375 | } | |
376 | ||
377 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
378 | struct kvm_sregs *sregs) | |
379 | { | |
380 | vcpu_load(vcpu); | |
381 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); | |
382 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
383 | vcpu_put(vcpu); | |
384 | return 0; | |
385 | } | |
386 | ||
387 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
388 | struct kvm_sregs *sregs) | |
389 | { | |
390 | vcpu_load(vcpu); | |
391 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); | |
392 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
393 | vcpu_put(vcpu); | |
394 | return 0; | |
395 | } | |
396 | ||
397 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
398 | { | |
399 | vcpu_load(vcpu); | |
400 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
401 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
402 | vcpu_put(vcpu); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
407 | { | |
408 | vcpu_load(vcpu); | |
409 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); | |
410 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
411 | vcpu_put(vcpu); | |
412 | return 0; | |
413 | } | |
414 | ||
415 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
416 | { | |
417 | int rc = 0; | |
418 | ||
419 | vcpu_load(vcpu); | |
420 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) | |
421 | rc = -EBUSY; | |
422 | else | |
423 | vcpu->arch.sie_block->gpsw = psw; | |
424 | vcpu_put(vcpu); | |
425 | return rc; | |
426 | } | |
427 | ||
428 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
429 | struct kvm_translation *tr) | |
430 | { | |
431 | return -EINVAL; /* not implemented yet */ | |
432 | } | |
433 | ||
d0bfb940 JK |
434 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
435 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
436 | { |
437 | return -EINVAL; /* not implemented yet */ | |
438 | } | |
439 | ||
62d9f0db MT |
440 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
441 | struct kvm_mp_state *mp_state) | |
442 | { | |
443 | return -EINVAL; /* not implemented yet */ | |
444 | } | |
445 | ||
446 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
447 | struct kvm_mp_state *mp_state) | |
448 | { | |
449 | return -EINVAL; /* not implemented yet */ | |
450 | } | |
451 | ||
b0c632db HC |
452 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
453 | { | |
454 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
455 | ||
456 | if (need_resched()) | |
457 | schedule(); | |
458 | ||
71cde587 CB |
459 | if (test_thread_flag(TIF_MCCK_PENDING)) |
460 | s390_handle_mcck(); | |
461 | ||
0ff31867 CO |
462 | kvm_s390_deliver_pending_interrupts(vcpu); |
463 | ||
b0c632db HC |
464 | vcpu->arch.sie_block->icptcode = 0; |
465 | local_irq_disable(); | |
466 | kvm_guest_enter(); | |
467 | local_irq_enable(); | |
468 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
469 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
1f0d0f09 CO |
470 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
471 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
472 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
473 | } | |
b0c632db HC |
474 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
475 | vcpu->arch.sie_block->icptcode); | |
476 | local_irq_disable(); | |
477 | kvm_guest_exit(); | |
478 | local_irq_enable(); | |
479 | ||
480 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
481 | } | |
482 | ||
483 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
484 | { | |
8f2abe6a | 485 | int rc; |
b0c632db HC |
486 | sigset_t sigsaved; |
487 | ||
488 | vcpu_load(vcpu); | |
489 | ||
9ace903d | 490 | rerun_vcpu: |
628eb9b8 CE |
491 | if (vcpu->requests) |
492 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
493 | kvm_s390_vcpu_set_mem(vcpu); | |
494 | ||
51e4d5ab | 495 | /* verify, that memory has been registered */ |
628eb9b8 | 496 | if (!vcpu->arch.sie_block->gmslm) { |
51e4d5ab | 497 | vcpu_put(vcpu); |
628eb9b8 | 498 | VCPU_EVENT(vcpu, 3, "%s", "no memory registered to run vcpu"); |
51e4d5ab CO |
499 | return -EINVAL; |
500 | } | |
501 | ||
b0c632db HC |
502 | if (vcpu->sigset_active) |
503 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
504 | ||
505 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
506 | ||
ba5c1e9b CO |
507 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
508 | ||
8f2abe6a CB |
509 | switch (kvm_run->exit_reason) { |
510 | case KVM_EXIT_S390_SIEIC: | |
511 | vcpu->arch.sie_block->gpsw.mask = kvm_run->s390_sieic.mask; | |
512 | vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr; | |
513 | break; | |
514 | case KVM_EXIT_UNKNOWN: | |
9ace903d | 515 | case KVM_EXIT_INTR: |
8f2abe6a CB |
516 | case KVM_EXIT_S390_RESET: |
517 | break; | |
518 | default: | |
519 | BUG(); | |
520 | } | |
521 | ||
dab4079d | 522 | might_fault(); |
8f2abe6a CB |
523 | |
524 | do { | |
525 | __vcpu_run(vcpu); | |
8f2abe6a CB |
526 | rc = kvm_handle_sie_intercept(vcpu); |
527 | } while (!signal_pending(current) && !rc); | |
528 | ||
9ace903d CE |
529 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
530 | goto rerun_vcpu; | |
531 | ||
b1d16c49 CE |
532 | if (signal_pending(current) && !rc) { |
533 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 534 | rc = -EINTR; |
b1d16c49 | 535 | } |
8f2abe6a CB |
536 | |
537 | if (rc == -ENOTSUPP) { | |
538 | /* intercept cannot be handled in-kernel, prepare kvm-run */ | |
539 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
540 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
541 | kvm_run->s390_sieic.mask = vcpu->arch.sie_block->gpsw.mask; | |
542 | kvm_run->s390_sieic.addr = vcpu->arch.sie_block->gpsw.addr; | |
543 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
544 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
545 | rc = 0; | |
546 | } | |
547 | ||
548 | if (rc == -EREMOTE) { | |
549 | /* intercept was handled, but userspace support is needed | |
550 | * kvm_run has been prepared by the handler */ | |
551 | rc = 0; | |
552 | } | |
b0c632db HC |
553 | |
554 | if (vcpu->sigset_active) | |
555 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
556 | ||
557 | vcpu_put(vcpu); | |
558 | ||
559 | vcpu->stat.exit_userspace++; | |
7e8e6ab4 | 560 | return rc; |
b0c632db HC |
561 | } |
562 | ||
563 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, | |
564 | unsigned long n, int prefix) | |
565 | { | |
566 | if (prefix) | |
567 | return copy_to_guest(vcpu, guestdest, from, n); | |
568 | else | |
569 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
570 | } | |
571 | ||
572 | /* | |
573 | * store status at address | |
574 | * we use have two special cases: | |
575 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
576 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
577 | */ | |
578 | int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
579 | { | |
580 | const unsigned char archmode = 1; | |
581 | int prefix; | |
582 | ||
583 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
584 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
585 | return -EFAULT; | |
586 | addr = SAVE_AREA_BASE; | |
587 | prefix = 0; | |
588 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
589 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
590 | return -EFAULT; | |
591 | addr = SAVE_AREA_BASE; | |
592 | prefix = 1; | |
593 | } else | |
594 | prefix = 0; | |
595 | ||
596 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, fp_regs), | |
597 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) | |
598 | return -EFAULT; | |
599 | ||
600 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, gp_regs), | |
601 | vcpu->arch.guest_gprs, 128, prefix)) | |
602 | return -EFAULT; | |
603 | ||
604 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, psw), | |
605 | &vcpu->arch.sie_block->gpsw, 16, prefix)) | |
606 | return -EFAULT; | |
607 | ||
608 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, pref_reg), | |
609 | &vcpu->arch.sie_block->prefix, 4, prefix)) | |
610 | return -EFAULT; | |
611 | ||
612 | if (__guestcopy(vcpu, | |
613 | addr + offsetof(struct save_area_s390x, fp_ctrl_reg), | |
614 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) | |
615 | return -EFAULT; | |
616 | ||
617 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, tod_reg), | |
618 | &vcpu->arch.sie_block->todpr, 4, prefix)) | |
619 | return -EFAULT; | |
620 | ||
621 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, timer), | |
622 | &vcpu->arch.sie_block->cputm, 8, prefix)) | |
623 | return -EFAULT; | |
624 | ||
625 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, clk_cmp), | |
626 | &vcpu->arch.sie_block->ckc, 8, prefix)) | |
627 | return -EFAULT; | |
628 | ||
629 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, acc_regs), | |
630 | &vcpu->arch.guest_acrs, 64, prefix)) | |
631 | return -EFAULT; | |
632 | ||
633 | if (__guestcopy(vcpu, | |
634 | addr + offsetof(struct save_area_s390x, ctrl_regs), | |
635 | &vcpu->arch.sie_block->gcr, 128, prefix)) | |
636 | return -EFAULT; | |
637 | return 0; | |
638 | } | |
639 | ||
640 | static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
641 | { | |
642 | int rc; | |
643 | ||
644 | vcpu_load(vcpu); | |
645 | rc = __kvm_s390_vcpu_store_status(vcpu, addr); | |
646 | vcpu_put(vcpu); | |
647 | return rc; | |
648 | } | |
649 | ||
650 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
651 | unsigned int ioctl, unsigned long arg) | |
652 | { | |
653 | struct kvm_vcpu *vcpu = filp->private_data; | |
654 | void __user *argp = (void __user *)arg; | |
655 | ||
656 | switch (ioctl) { | |
ba5c1e9b CO |
657 | case KVM_S390_INTERRUPT: { |
658 | struct kvm_s390_interrupt s390int; | |
659 | ||
660 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
661 | return -EFAULT; | |
662 | return kvm_s390_inject_vcpu(vcpu, &s390int); | |
663 | } | |
b0c632db HC |
664 | case KVM_S390_STORE_STATUS: |
665 | return kvm_s390_vcpu_store_status(vcpu, arg); | |
666 | case KVM_S390_SET_INITIAL_PSW: { | |
667 | psw_t psw; | |
668 | ||
669 | if (copy_from_user(&psw, argp, sizeof(psw))) | |
670 | return -EFAULT; | |
671 | return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
672 | } | |
673 | case KVM_S390_INITIAL_RESET: | |
674 | return kvm_arch_vcpu_ioctl_initial_reset(vcpu); | |
675 | default: | |
676 | ; | |
677 | } | |
678 | return -EINVAL; | |
679 | } | |
680 | ||
681 | /* Section: memory related */ | |
682 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
683 | struct kvm_userspace_memory_region *mem, | |
684 | struct kvm_memory_slot old, | |
685 | int user_alloc) | |
686 | { | |
2668dab7 | 687 | int i; |
988a2cae | 688 | struct kvm_vcpu *vcpu; |
2668dab7 | 689 | |
b0c632db HC |
690 | /* A few sanity checks. We can have exactly one memory slot which has |
691 | to start at guest virtual zero and which has to be located at a | |
692 | page boundary in userland and which has to end at a page boundary. | |
693 | The memory in userland is ok to be fragmented into various different | |
694 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
695 | doing this call at any time */ | |
696 | ||
628eb9b8 | 697 | if (mem->slot) |
b0c632db HC |
698 | return -EINVAL; |
699 | ||
700 | if (mem->guest_phys_addr) | |
701 | return -EINVAL; | |
702 | ||
703 | if (mem->userspace_addr & (PAGE_SIZE - 1)) | |
704 | return -EINVAL; | |
705 | ||
706 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
707 | return -EINVAL; | |
708 | ||
2668dab7 CO |
709 | if (!user_alloc) |
710 | return -EINVAL; | |
711 | ||
628eb9b8 | 712 | /* request update of sie control block for all available vcpus */ |
988a2cae GN |
713 | kvm_for_each_vcpu(i, vcpu, kvm) { |
714 | if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
715 | continue; | |
716 | kvm_s390_inject_sigp_stop(vcpu, ACTION_RELOADVCPU_ON_STOP); | |
2668dab7 | 717 | } |
b0c632db HC |
718 | |
719 | return 0; | |
720 | } | |
721 | ||
34d4cb8f MT |
722 | void kvm_arch_flush_shadow(struct kvm *kvm) |
723 | { | |
724 | } | |
725 | ||
b0c632db HC |
726 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
727 | { | |
728 | return gfn; | |
729 | } | |
730 | ||
731 | static int __init kvm_s390_init(void) | |
732 | { | |
ef50f7ac CB |
733 | int ret; |
734 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE); | |
735 | if (ret) | |
736 | return ret; | |
737 | ||
738 | /* | |
739 | * guests can ask for up to 255+1 double words, we need a full page | |
740 | * to hold the maximum amount of facilites. On the other hand, we | |
741 | * only set facilities that are known to work in KVM. | |
742 | */ | |
743 | facilities = (unsigned long long *) get_zeroed_page(GFP_DMA); | |
744 | if (!facilities) { | |
745 | kvm_exit(); | |
746 | return -ENOMEM; | |
747 | } | |
748 | stfle(facilities, 1); | |
749 | facilities[0] &= 0xff00fff3f0700000ULL; | |
750 | return 0; | |
b0c632db HC |
751 | } |
752 | ||
753 | static void __exit kvm_s390_exit(void) | |
754 | { | |
ef50f7ac | 755 | free_page((unsigned long) facilities); |
b0c632db HC |
756 | kvm_exit(); |
757 | } | |
758 | ||
759 | module_init(kvm_s390_init); | |
760 | module_exit(kvm_s390_exit); |