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 */ | |
10474ae8 | 77 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
78 | { |
79 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 80 | return 0; |
b0c632db HC |
81 | } |
82 | ||
83 | void kvm_arch_hardware_disable(void *garbage) | |
84 | { | |
85 | } | |
86 | ||
b0c632db HC |
87 | int kvm_arch_hardware_setup(void) |
88 | { | |
89 | return 0; | |
90 | } | |
91 | ||
92 | void kvm_arch_hardware_unsetup(void) | |
93 | { | |
94 | } | |
95 | ||
96 | void kvm_arch_check_processor_compat(void *rtn) | |
97 | { | |
98 | } | |
99 | ||
100 | int kvm_arch_init(void *opaque) | |
101 | { | |
102 | return 0; | |
103 | } | |
104 | ||
105 | void kvm_arch_exit(void) | |
106 | { | |
107 | } | |
108 | ||
109 | /* Section: device related */ | |
110 | long kvm_arch_dev_ioctl(struct file *filp, | |
111 | unsigned int ioctl, unsigned long arg) | |
112 | { | |
113 | if (ioctl == KVM_S390_ENABLE_SIE) | |
114 | return s390_enable_sie(); | |
115 | return -EINVAL; | |
116 | } | |
117 | ||
118 | int kvm_dev_ioctl_check_extension(long ext) | |
119 | { | |
d7b0b5eb CO |
120 | int r; |
121 | ||
2bd0ac4e | 122 | switch (ext) { |
d7b0b5eb CO |
123 | case KVM_CAP_S390_PSW: |
124 | r = 1; | |
125 | break; | |
2bd0ac4e | 126 | default: |
d7b0b5eb | 127 | r = 0; |
2bd0ac4e | 128 | } |
d7b0b5eb | 129 | return r; |
b0c632db HC |
130 | } |
131 | ||
132 | /* Section: vm related */ | |
133 | /* | |
134 | * Get (and clear) the dirty memory log for a memory slot. | |
135 | */ | |
136 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
137 | struct kvm_dirty_log *log) | |
138 | { | |
139 | return 0; | |
140 | } | |
141 | ||
142 | long kvm_arch_vm_ioctl(struct file *filp, | |
143 | unsigned int ioctl, unsigned long arg) | |
144 | { | |
145 | struct kvm *kvm = filp->private_data; | |
146 | void __user *argp = (void __user *)arg; | |
147 | int r; | |
148 | ||
149 | switch (ioctl) { | |
ba5c1e9b CO |
150 | case KVM_S390_INTERRUPT: { |
151 | struct kvm_s390_interrupt s390int; | |
152 | ||
153 | r = -EFAULT; | |
154 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
155 | break; | |
156 | r = kvm_s390_inject_vm(kvm, &s390int); | |
157 | break; | |
158 | } | |
b0c632db | 159 | default: |
367e1319 | 160 | r = -ENOTTY; |
b0c632db HC |
161 | } |
162 | ||
163 | return r; | |
164 | } | |
165 | ||
166 | struct kvm *kvm_arch_create_vm(void) | |
167 | { | |
168 | struct kvm *kvm; | |
169 | int rc; | |
170 | char debug_name[16]; | |
171 | ||
172 | rc = s390_enable_sie(); | |
173 | if (rc) | |
174 | goto out_nokvm; | |
175 | ||
176 | rc = -ENOMEM; | |
177 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
178 | if (!kvm) | |
179 | goto out_nokvm; | |
180 | ||
181 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); | |
182 | if (!kvm->arch.sca) | |
183 | goto out_nosca; | |
184 | ||
185 | sprintf(debug_name, "kvm-%u", current->pid); | |
186 | ||
187 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
188 | if (!kvm->arch.dbf) | |
189 | goto out_nodbf; | |
190 | ||
ba5c1e9b CO |
191 | spin_lock_init(&kvm->arch.float_int.lock); |
192 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
193 | ||
b0c632db HC |
194 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
195 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
196 | ||
b0c632db HC |
197 | return kvm; |
198 | out_nodbf: | |
199 | free_page((unsigned long)(kvm->arch.sca)); | |
200 | out_nosca: | |
201 | kfree(kvm); | |
202 | out_nokvm: | |
203 | return ERR_PTR(rc); | |
204 | } | |
205 | ||
d329c035 CB |
206 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
207 | { | |
208 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
abf4a71e CO |
209 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
210 | (__u64) vcpu->arch.sie_block) | |
211 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
212 | smp_mb(); | |
d329c035 | 213 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 214 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
215 | kfree(vcpu); |
216 | } | |
217 | ||
218 | static void kvm_free_vcpus(struct kvm *kvm) | |
219 | { | |
220 | unsigned int i; | |
988a2cae | 221 | struct kvm_vcpu *vcpu; |
d329c035 | 222 | |
988a2cae GN |
223 | kvm_for_each_vcpu(i, vcpu, kvm) |
224 | kvm_arch_vcpu_destroy(vcpu); | |
225 | ||
226 | mutex_lock(&kvm->lock); | |
227 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
228 | kvm->vcpus[i] = NULL; | |
229 | ||
230 | atomic_set(&kvm->online_vcpus, 0); | |
231 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
232 | } |
233 | ||
ad8ba2cd SY |
234 | void kvm_arch_sync_events(struct kvm *kvm) |
235 | { | |
236 | } | |
237 | ||
b0c632db HC |
238 | void kvm_arch_destroy_vm(struct kvm *kvm) |
239 | { | |
d329c035 | 240 | kvm_free_vcpus(kvm); |
dfdded7c | 241 | kvm_free_physmem(kvm); |
b0c632db | 242 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 243 | debug_unregister(kvm->arch.dbf); |
b0c632db | 244 | kfree(kvm); |
b0c632db HC |
245 | } |
246 | ||
247 | /* Section: vcpu related */ | |
248 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
249 | { | |
250 | return 0; | |
251 | } | |
252 | ||
253 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
254 | { | |
6692cef3 | 255 | /* Nothing todo */ |
b0c632db HC |
256 | } |
257 | ||
258 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
259 | { | |
260 | save_fp_regs(&vcpu->arch.host_fpregs); | |
261 | save_access_regs(vcpu->arch.host_acrs); | |
262 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
263 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
264 | restore_access_regs(vcpu->arch.guest_acrs); | |
b0c632db HC |
265 | } |
266 | ||
267 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
268 | { | |
269 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
270 | save_access_regs(vcpu->arch.guest_acrs); | |
271 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
272 | restore_access_regs(vcpu->arch.host_acrs); | |
273 | } | |
274 | ||
275 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
276 | { | |
277 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
278 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
279 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
280 | vcpu->arch.sie_block->prefix = 0UL; | |
281 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
282 | vcpu->arch.sie_block->cputm = 0UL; | |
283 | vcpu->arch.sie_block->ckc = 0UL; | |
284 | vcpu->arch.sie_block->todpr = 0; | |
285 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
286 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
287 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
288 | vcpu->arch.guest_fpregs.fpc = 0; | |
289 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
290 | vcpu->arch.sie_block->gbea = 1; | |
291 | } | |
292 | ||
293 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
294 | { | |
295 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); | |
628eb9b8 | 296 | set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests); |
b0c632db HC |
297 | vcpu->arch.sie_block->ecb = 2; |
298 | vcpu->arch.sie_block->eca = 0xC1002001U; | |
ef50f7ac | 299 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
300 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
301 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
302 | (unsigned long) vcpu); | |
303 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 304 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 305 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
306 | return 0; |
307 | } | |
308 | ||
309 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
310 | unsigned int id) | |
311 | { | |
312 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
313 | int rc = -ENOMEM; | |
314 | ||
315 | if (!vcpu) | |
316 | goto out_nomem; | |
317 | ||
180c12fb CB |
318 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
319 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
320 | |
321 | if (!vcpu->arch.sie_block) | |
322 | goto out_free_cpu; | |
323 | ||
324 | vcpu->arch.sie_block->icpua = id; | |
325 | BUG_ON(!kvm->arch.sca); | |
abf4a71e CO |
326 | if (!kvm->arch.sca->cpu[id].sda) |
327 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
b0c632db HC |
328 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
329 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
330 | ||
ba5c1e9b CO |
331 | spin_lock_init(&vcpu->arch.local_int.lock); |
332 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
333 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 334 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
335 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
336 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 337 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 338 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 339 | |
b0c632db HC |
340 | rc = kvm_vcpu_init(vcpu, kvm, id); |
341 | if (rc) | |
342 | goto out_free_cpu; | |
343 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, | |
344 | vcpu->arch.sie_block); | |
345 | ||
b0c632db HC |
346 | return vcpu; |
347 | out_free_cpu: | |
348 | kfree(vcpu); | |
349 | out_nomem: | |
350 | return ERR_PTR(rc); | |
351 | } | |
352 | ||
b0c632db HC |
353 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
354 | { | |
355 | /* kvm common code refers to this, but never calls it */ | |
356 | BUG(); | |
357 | return 0; | |
358 | } | |
359 | ||
360 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
361 | { | |
362 | vcpu_load(vcpu); | |
363 | kvm_s390_vcpu_initial_reset(vcpu); | |
364 | vcpu_put(vcpu); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
369 | { | |
370 | vcpu_load(vcpu); | |
371 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); | |
372 | vcpu_put(vcpu); | |
373 | return 0; | |
374 | } | |
375 | ||
376 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
377 | { | |
378 | vcpu_load(vcpu); | |
379 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); | |
380 | vcpu_put(vcpu); | |
381 | return 0; | |
382 | } | |
383 | ||
384 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
385 | struct kvm_sregs *sregs) | |
386 | { | |
387 | vcpu_load(vcpu); | |
388 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); | |
389 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
390 | vcpu_put(vcpu); | |
391 | return 0; | |
392 | } | |
393 | ||
394 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
395 | struct kvm_sregs *sregs) | |
396 | { | |
397 | vcpu_load(vcpu); | |
398 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); | |
399 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
400 | vcpu_put(vcpu); | |
401 | return 0; | |
402 | } | |
403 | ||
404 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
405 | { | |
406 | vcpu_load(vcpu); | |
407 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
408 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
409 | vcpu_put(vcpu); | |
410 | return 0; | |
411 | } | |
412 | ||
413 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
414 | { | |
415 | vcpu_load(vcpu); | |
416 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); | |
417 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
418 | vcpu_put(vcpu); | |
419 | return 0; | |
420 | } | |
421 | ||
422 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
423 | { | |
424 | int rc = 0; | |
425 | ||
426 | vcpu_load(vcpu); | |
427 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) | |
428 | rc = -EBUSY; | |
d7b0b5eb CO |
429 | else { |
430 | vcpu->run->psw_mask = psw.mask; | |
431 | vcpu->run->psw_addr = psw.addr; | |
432 | } | |
b0c632db HC |
433 | vcpu_put(vcpu); |
434 | return rc; | |
435 | } | |
436 | ||
437 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
438 | struct kvm_translation *tr) | |
439 | { | |
440 | return -EINVAL; /* not implemented yet */ | |
441 | } | |
442 | ||
d0bfb940 JK |
443 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
444 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
445 | { |
446 | return -EINVAL; /* not implemented yet */ | |
447 | } | |
448 | ||
62d9f0db MT |
449 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
450 | struct kvm_mp_state *mp_state) | |
451 | { | |
452 | return -EINVAL; /* not implemented yet */ | |
453 | } | |
454 | ||
455 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
456 | struct kvm_mp_state *mp_state) | |
457 | { | |
458 | return -EINVAL; /* not implemented yet */ | |
459 | } | |
460 | ||
b0c632db HC |
461 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
462 | { | |
463 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
464 | ||
465 | if (need_resched()) | |
466 | schedule(); | |
467 | ||
71cde587 CB |
468 | if (test_thread_flag(TIF_MCCK_PENDING)) |
469 | s390_handle_mcck(); | |
470 | ||
0ff31867 CO |
471 | kvm_s390_deliver_pending_interrupts(vcpu); |
472 | ||
b0c632db HC |
473 | vcpu->arch.sie_block->icptcode = 0; |
474 | local_irq_disable(); | |
475 | kvm_guest_enter(); | |
476 | local_irq_enable(); | |
477 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
478 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
1f0d0f09 CO |
479 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
480 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
481 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
482 | } | |
b0c632db HC |
483 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
484 | vcpu->arch.sie_block->icptcode); | |
485 | local_irq_disable(); | |
486 | kvm_guest_exit(); | |
487 | local_irq_enable(); | |
488 | ||
489 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
490 | } | |
491 | ||
492 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
493 | { | |
8f2abe6a | 494 | int rc; |
b0c632db HC |
495 | sigset_t sigsaved; |
496 | ||
497 | vcpu_load(vcpu); | |
498 | ||
9ace903d | 499 | rerun_vcpu: |
628eb9b8 CE |
500 | if (vcpu->requests) |
501 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
502 | kvm_s390_vcpu_set_mem(vcpu); | |
503 | ||
51e4d5ab | 504 | /* verify, that memory has been registered */ |
628eb9b8 | 505 | if (!vcpu->arch.sie_block->gmslm) { |
51e4d5ab | 506 | vcpu_put(vcpu); |
628eb9b8 | 507 | VCPU_EVENT(vcpu, 3, "%s", "no memory registered to run vcpu"); |
51e4d5ab CO |
508 | return -EINVAL; |
509 | } | |
510 | ||
b0c632db HC |
511 | if (vcpu->sigset_active) |
512 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
513 | ||
514 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
515 | ||
ba5c1e9b CO |
516 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
517 | ||
8f2abe6a CB |
518 | switch (kvm_run->exit_reason) { |
519 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 520 | case KVM_EXIT_UNKNOWN: |
9ace903d | 521 | case KVM_EXIT_INTR: |
8f2abe6a CB |
522 | case KVM_EXIT_S390_RESET: |
523 | break; | |
524 | default: | |
525 | BUG(); | |
526 | } | |
527 | ||
d7b0b5eb CO |
528 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
529 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
530 | ||
dab4079d | 531 | might_fault(); |
8f2abe6a CB |
532 | |
533 | do { | |
534 | __vcpu_run(vcpu); | |
8f2abe6a CB |
535 | rc = kvm_handle_sie_intercept(vcpu); |
536 | } while (!signal_pending(current) && !rc); | |
537 | ||
9ace903d CE |
538 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
539 | goto rerun_vcpu; | |
540 | ||
b1d16c49 CE |
541 | if (signal_pending(current) && !rc) { |
542 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 543 | rc = -EINTR; |
b1d16c49 | 544 | } |
8f2abe6a CB |
545 | |
546 | if (rc == -ENOTSUPP) { | |
547 | /* intercept cannot be handled in-kernel, prepare kvm-run */ | |
548 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
549 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
550 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
551 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
552 | rc = 0; | |
553 | } | |
554 | ||
555 | if (rc == -EREMOTE) { | |
556 | /* intercept was handled, but userspace support is needed | |
557 | * kvm_run has been prepared by the handler */ | |
558 | rc = 0; | |
559 | } | |
b0c632db | 560 | |
d7b0b5eb CO |
561 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
562 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
563 | ||
b0c632db HC |
564 | if (vcpu->sigset_active) |
565 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
566 | ||
567 | vcpu_put(vcpu); | |
568 | ||
569 | vcpu->stat.exit_userspace++; | |
7e8e6ab4 | 570 | return rc; |
b0c632db HC |
571 | } |
572 | ||
573 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, | |
574 | unsigned long n, int prefix) | |
575 | { | |
576 | if (prefix) | |
577 | return copy_to_guest(vcpu, guestdest, from, n); | |
578 | else | |
579 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
580 | } | |
581 | ||
582 | /* | |
583 | * store status at address | |
584 | * we use have two special cases: | |
585 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
586 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
587 | */ | |
588 | int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
589 | { | |
590 | const unsigned char archmode = 1; | |
591 | int prefix; | |
592 | ||
593 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
594 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
595 | return -EFAULT; | |
596 | addr = SAVE_AREA_BASE; | |
597 | prefix = 0; | |
598 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
599 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
600 | return -EFAULT; | |
601 | addr = SAVE_AREA_BASE; | |
602 | prefix = 1; | |
603 | } else | |
604 | prefix = 0; | |
605 | ||
f64ca217 | 606 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
607 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
608 | return -EFAULT; | |
609 | ||
f64ca217 | 610 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
b0c632db HC |
611 | vcpu->arch.guest_gprs, 128, prefix)) |
612 | return -EFAULT; | |
613 | ||
f64ca217 | 614 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
615 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
616 | return -EFAULT; | |
617 | ||
f64ca217 | 618 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
619 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
620 | return -EFAULT; | |
621 | ||
622 | if (__guestcopy(vcpu, | |
f64ca217 | 623 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
624 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
625 | return -EFAULT; | |
626 | ||
f64ca217 | 627 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
628 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
629 | return -EFAULT; | |
630 | ||
f64ca217 | 631 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
632 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
633 | return -EFAULT; | |
634 | ||
f64ca217 | 635 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
636 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
637 | return -EFAULT; | |
638 | ||
f64ca217 | 639 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
b0c632db HC |
640 | &vcpu->arch.guest_acrs, 64, prefix)) |
641 | return -EFAULT; | |
642 | ||
643 | if (__guestcopy(vcpu, | |
f64ca217 | 644 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
645 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
646 | return -EFAULT; | |
647 | return 0; | |
648 | } | |
649 | ||
650 | static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
651 | { | |
652 | int rc; | |
653 | ||
654 | vcpu_load(vcpu); | |
655 | rc = __kvm_s390_vcpu_store_status(vcpu, addr); | |
656 | vcpu_put(vcpu); | |
657 | return rc; | |
658 | } | |
659 | ||
660 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
661 | unsigned int ioctl, unsigned long arg) | |
662 | { | |
663 | struct kvm_vcpu *vcpu = filp->private_data; | |
664 | void __user *argp = (void __user *)arg; | |
665 | ||
666 | switch (ioctl) { | |
ba5c1e9b CO |
667 | case KVM_S390_INTERRUPT: { |
668 | struct kvm_s390_interrupt s390int; | |
669 | ||
670 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
671 | return -EFAULT; | |
672 | return kvm_s390_inject_vcpu(vcpu, &s390int); | |
673 | } | |
b0c632db HC |
674 | case KVM_S390_STORE_STATUS: |
675 | return kvm_s390_vcpu_store_status(vcpu, arg); | |
676 | case KVM_S390_SET_INITIAL_PSW: { | |
677 | psw_t psw; | |
678 | ||
679 | if (copy_from_user(&psw, argp, sizeof(psw))) | |
680 | return -EFAULT; | |
681 | return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
682 | } | |
683 | case KVM_S390_INITIAL_RESET: | |
684 | return kvm_arch_vcpu_ioctl_initial_reset(vcpu); | |
685 | default: | |
686 | ; | |
687 | } | |
688 | return -EINVAL; | |
689 | } | |
690 | ||
691 | /* Section: memory related */ | |
692 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
693 | struct kvm_userspace_memory_region *mem, | |
694 | struct kvm_memory_slot old, | |
695 | int user_alloc) | |
696 | { | |
2668dab7 | 697 | int i; |
988a2cae | 698 | struct kvm_vcpu *vcpu; |
2668dab7 | 699 | |
b0c632db HC |
700 | /* A few sanity checks. We can have exactly one memory slot which has |
701 | to start at guest virtual zero and which has to be located at a | |
702 | page boundary in userland and which has to end at a page boundary. | |
703 | The memory in userland is ok to be fragmented into various different | |
704 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
705 | doing this call at any time */ | |
706 | ||
628eb9b8 | 707 | if (mem->slot) |
b0c632db HC |
708 | return -EINVAL; |
709 | ||
710 | if (mem->guest_phys_addr) | |
711 | return -EINVAL; | |
712 | ||
713 | if (mem->userspace_addr & (PAGE_SIZE - 1)) | |
714 | return -EINVAL; | |
715 | ||
716 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
717 | return -EINVAL; | |
718 | ||
2668dab7 CO |
719 | if (!user_alloc) |
720 | return -EINVAL; | |
721 | ||
628eb9b8 | 722 | /* request update of sie control block for all available vcpus */ |
988a2cae GN |
723 | kvm_for_each_vcpu(i, vcpu, kvm) { |
724 | if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
725 | continue; | |
726 | kvm_s390_inject_sigp_stop(vcpu, ACTION_RELOADVCPU_ON_STOP); | |
2668dab7 | 727 | } |
b0c632db HC |
728 | |
729 | return 0; | |
730 | } | |
731 | ||
34d4cb8f MT |
732 | void kvm_arch_flush_shadow(struct kvm *kvm) |
733 | { | |
734 | } | |
735 | ||
b0c632db HC |
736 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
737 | { | |
738 | return gfn; | |
739 | } | |
740 | ||
741 | static int __init kvm_s390_init(void) | |
742 | { | |
ef50f7ac CB |
743 | int ret; |
744 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE); | |
745 | if (ret) | |
746 | return ret; | |
747 | ||
748 | /* | |
749 | * guests can ask for up to 255+1 double words, we need a full page | |
750 | * to hold the maximum amount of facilites. On the other hand, we | |
751 | * only set facilities that are known to work in KVM. | |
752 | */ | |
753 | facilities = (unsigned long long *) get_zeroed_page(GFP_DMA); | |
754 | if (!facilities) { | |
755 | kvm_exit(); | |
756 | return -ENOMEM; | |
757 | } | |
758 | stfle(facilities, 1); | |
759 | facilities[0] &= 0xff00fff3f0700000ULL; | |
760 | return 0; | |
b0c632db HC |
761 | } |
762 | ||
763 | static void __exit kvm_s390_exit(void) | |
764 | { | |
ef50f7ac | 765 | free_page((unsigned long) facilities); |
b0c632db HC |
766 | kvm_exit(); |
767 | } | |
768 | ||
769 | module_init(kvm_s390_init); | |
770 | module_exit(kvm_s390_exit); |