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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> |
cbb870c8 | 26 | #include <asm/asm-offsets.h> |
b0c632db HC |
27 | #include <asm/lowcore.h> |
28 | #include <asm/pgtable.h> | |
f5daba1d | 29 | #include <asm/nmi.h> |
ef50f7ac | 30 | #include <asm/system.h> |
8f2abe6a | 31 | #include "kvm-s390.h" |
b0c632db HC |
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) }, | |
0eaeafa1 | 38 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
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) }, | |
ba5c1e9b CO |
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) }, | |
f5e10b09 | 46 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b CO |
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) }, | |
453423dc CB |
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) }, | |
5288fbf0 CB |
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) }, | |
e28acfea | 71 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
b0c632db HC |
72 | { NULL } |
73 | }; | |
74 | ||
ef50f7ac | 75 | static unsigned long long *facilities; |
b0c632db HC |
76 | |
77 | /* Section: not file related */ | |
10474ae8 | 78 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
79 | { |
80 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 81 | return 0; |
b0c632db HC |
82 | } |
83 | ||
84 | void kvm_arch_hardware_disable(void *garbage) | |
85 | { | |
86 | } | |
87 | ||
b0c632db HC |
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 | { | |
d7b0b5eb CO |
121 | int r; |
122 | ||
2bd0ac4e | 123 | switch (ext) { |
d7b0b5eb CO |
124 | case KVM_CAP_S390_PSW: |
125 | r = 1; | |
126 | break; | |
2bd0ac4e | 127 | default: |
d7b0b5eb | 128 | r = 0; |
2bd0ac4e | 129 | } |
d7b0b5eb | 130 | return r; |
b0c632db HC |
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) { | |
ba5c1e9b CO |
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 | } | |
b0c632db | 160 | default: |
367e1319 | 161 | r = -ENOTTY; |
b0c632db HC |
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 | ||
ba5c1e9b CO |
192 | spin_lock_init(&kvm->arch.float_int.lock); |
193 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
194 | ||
b0c632db HC |
195 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
196 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
197 | ||
b0c632db HC |
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 | ||
d329c035 CB |
207 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
208 | { | |
209 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
abf4a71e CO |
210 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
211 | (__u64) vcpu->arch.sie_block) | |
212 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
213 | smp_mb(); | |
d329c035 | 214 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 215 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
216 | kfree(vcpu); |
217 | } | |
218 | ||
219 | static void kvm_free_vcpus(struct kvm *kvm) | |
220 | { | |
221 | unsigned int i; | |
988a2cae | 222 | struct kvm_vcpu *vcpu; |
d329c035 | 223 | |
988a2cae GN |
224 | kvm_for_each_vcpu(i, vcpu, kvm) |
225 | kvm_arch_vcpu_destroy(vcpu); | |
226 | ||
227 | mutex_lock(&kvm->lock); | |
228 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
229 | kvm->vcpus[i] = NULL; | |
230 | ||
231 | atomic_set(&kvm->online_vcpus, 0); | |
232 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
233 | } |
234 | ||
ad8ba2cd SY |
235 | void kvm_arch_sync_events(struct kvm *kvm) |
236 | { | |
237 | } | |
238 | ||
b0c632db HC |
239 | void kvm_arch_destroy_vm(struct kvm *kvm) |
240 | { | |
d329c035 | 241 | kvm_free_vcpus(kvm); |
dfdded7c | 242 | kvm_free_physmem(kvm); |
b0c632db | 243 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 244 | debug_unregister(kvm->arch.dbf); |
b0c632db | 245 | kfree(kvm); |
b0c632db HC |
246 | } |
247 | ||
248 | /* Section: vcpu related */ | |
249 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
250 | { | |
251 | return 0; | |
252 | } | |
253 | ||
254 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
255 | { | |
6692cef3 | 256 | /* Nothing todo */ |
b0c632db HC |
257 | } |
258 | ||
259 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
260 | { | |
261 | save_fp_regs(&vcpu->arch.host_fpregs); | |
262 | save_access_regs(vcpu->arch.host_acrs); | |
263 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
264 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
265 | restore_access_regs(vcpu->arch.guest_acrs); | |
b0c632db HC |
266 | } |
267 | ||
268 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
269 | { | |
270 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
271 | save_access_regs(vcpu->arch.guest_acrs); | |
272 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
273 | restore_access_regs(vcpu->arch.host_acrs); | |
274 | } | |
275 | ||
276 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
277 | { | |
278 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
279 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
280 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
281 | vcpu->arch.sie_block->prefix = 0UL; | |
282 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
283 | vcpu->arch.sie_block->cputm = 0UL; | |
284 | vcpu->arch.sie_block->ckc = 0UL; | |
285 | vcpu->arch.sie_block->todpr = 0; | |
286 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
287 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
288 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
289 | vcpu->arch.guest_fpregs.fpc = 0; | |
290 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
291 | vcpu->arch.sie_block->gbea = 1; | |
292 | } | |
293 | ||
294 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
295 | { | |
296 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); | |
628eb9b8 | 297 | set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests); |
b0c632db HC |
298 | vcpu->arch.sie_block->ecb = 2; |
299 | vcpu->arch.sie_block->eca = 0xC1002001U; | |
ef50f7ac | 300 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
301 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
302 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
303 | (unsigned long) vcpu); | |
304 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 305 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 306 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
307 | return 0; |
308 | } | |
309 | ||
310 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
311 | unsigned int id) | |
312 | { | |
313 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
314 | int rc = -ENOMEM; | |
315 | ||
316 | if (!vcpu) | |
317 | goto out_nomem; | |
318 | ||
180c12fb CB |
319 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
320 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
321 | |
322 | if (!vcpu->arch.sie_block) | |
323 | goto out_free_cpu; | |
324 | ||
325 | vcpu->arch.sie_block->icpua = id; | |
326 | BUG_ON(!kvm->arch.sca); | |
abf4a71e CO |
327 | if (!kvm->arch.sca->cpu[id].sda) |
328 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
b0c632db HC |
329 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
330 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
331 | ||
ba5c1e9b CO |
332 | spin_lock_init(&vcpu->arch.local_int.lock); |
333 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
334 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 335 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
336 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
337 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 338 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 339 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 340 | |
b0c632db HC |
341 | rc = kvm_vcpu_init(vcpu, kvm, id); |
342 | if (rc) | |
343 | goto out_free_cpu; | |
344 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, | |
345 | vcpu->arch.sie_block); | |
346 | ||
b0c632db HC |
347 | return vcpu; |
348 | out_free_cpu: | |
349 | kfree(vcpu); | |
350 | out_nomem: | |
351 | return ERR_PTR(rc); | |
352 | } | |
353 | ||
b0c632db HC |
354 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
355 | { | |
356 | /* kvm common code refers to this, but never calls it */ | |
357 | BUG(); | |
358 | return 0; | |
359 | } | |
360 | ||
361 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
362 | { | |
363 | vcpu_load(vcpu); | |
364 | kvm_s390_vcpu_initial_reset(vcpu); | |
365 | vcpu_put(vcpu); | |
366 | return 0; | |
367 | } | |
368 | ||
369 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
370 | { | |
371 | vcpu_load(vcpu); | |
372 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); | |
373 | vcpu_put(vcpu); | |
374 | return 0; | |
375 | } | |
376 | ||
377 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
378 | { | |
379 | vcpu_load(vcpu); | |
380 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); | |
381 | vcpu_put(vcpu); | |
382 | return 0; | |
383 | } | |
384 | ||
385 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
386 | struct kvm_sregs *sregs) | |
387 | { | |
388 | vcpu_load(vcpu); | |
389 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); | |
390 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
391 | vcpu_put(vcpu); | |
392 | return 0; | |
393 | } | |
394 | ||
395 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
396 | struct kvm_sregs *sregs) | |
397 | { | |
398 | vcpu_load(vcpu); | |
399 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); | |
400 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
401 | vcpu_put(vcpu); | |
402 | return 0; | |
403 | } | |
404 | ||
405 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
406 | { | |
407 | vcpu_load(vcpu); | |
408 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
409 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
410 | vcpu_put(vcpu); | |
411 | return 0; | |
412 | } | |
413 | ||
414 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
415 | { | |
416 | vcpu_load(vcpu); | |
417 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); | |
418 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
419 | vcpu_put(vcpu); | |
420 | return 0; | |
421 | } | |
422 | ||
423 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
424 | { | |
425 | int rc = 0; | |
426 | ||
427 | vcpu_load(vcpu); | |
428 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) | |
429 | rc = -EBUSY; | |
d7b0b5eb CO |
430 | else { |
431 | vcpu->run->psw_mask = psw.mask; | |
432 | vcpu->run->psw_addr = psw.addr; | |
433 | } | |
b0c632db HC |
434 | vcpu_put(vcpu); |
435 | return rc; | |
436 | } | |
437 | ||
438 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
439 | struct kvm_translation *tr) | |
440 | { | |
441 | return -EINVAL; /* not implemented yet */ | |
442 | } | |
443 | ||
d0bfb940 JK |
444 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
445 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
446 | { |
447 | return -EINVAL; /* not implemented yet */ | |
448 | } | |
449 | ||
62d9f0db MT |
450 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
451 | struct kvm_mp_state *mp_state) | |
452 | { | |
453 | return -EINVAL; /* not implemented yet */ | |
454 | } | |
455 | ||
456 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
457 | struct kvm_mp_state *mp_state) | |
458 | { | |
459 | return -EINVAL; /* not implemented yet */ | |
460 | } | |
461 | ||
b0c632db HC |
462 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
463 | { | |
464 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
465 | ||
466 | if (need_resched()) | |
467 | schedule(); | |
468 | ||
71cde587 CB |
469 | if (test_thread_flag(TIF_MCCK_PENDING)) |
470 | s390_handle_mcck(); | |
471 | ||
0ff31867 CO |
472 | kvm_s390_deliver_pending_interrupts(vcpu); |
473 | ||
b0c632db HC |
474 | vcpu->arch.sie_block->icptcode = 0; |
475 | local_irq_disable(); | |
476 | kvm_guest_enter(); | |
477 | local_irq_enable(); | |
478 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
479 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
1f0d0f09 CO |
480 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
481 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
482 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
483 | } | |
b0c632db HC |
484 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
485 | vcpu->arch.sie_block->icptcode); | |
486 | local_irq_disable(); | |
487 | kvm_guest_exit(); | |
488 | local_irq_enable(); | |
489 | ||
490 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
491 | } | |
492 | ||
493 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
494 | { | |
8f2abe6a | 495 | int rc; |
b0c632db HC |
496 | sigset_t sigsaved; |
497 | ||
498 | vcpu_load(vcpu); | |
499 | ||
9ace903d | 500 | rerun_vcpu: |
628eb9b8 CE |
501 | if (vcpu->requests) |
502 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
503 | kvm_s390_vcpu_set_mem(vcpu); | |
504 | ||
51e4d5ab | 505 | /* verify, that memory has been registered */ |
628eb9b8 | 506 | if (!vcpu->arch.sie_block->gmslm) { |
51e4d5ab | 507 | vcpu_put(vcpu); |
628eb9b8 | 508 | VCPU_EVENT(vcpu, 3, "%s", "no memory registered to run vcpu"); |
51e4d5ab CO |
509 | return -EINVAL; |
510 | } | |
511 | ||
b0c632db HC |
512 | if (vcpu->sigset_active) |
513 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
514 | ||
515 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
516 | ||
ba5c1e9b CO |
517 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
518 | ||
8f2abe6a CB |
519 | switch (kvm_run->exit_reason) { |
520 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 521 | case KVM_EXIT_UNKNOWN: |
9ace903d | 522 | case KVM_EXIT_INTR: |
8f2abe6a CB |
523 | case KVM_EXIT_S390_RESET: |
524 | break; | |
525 | default: | |
526 | BUG(); | |
527 | } | |
528 | ||
d7b0b5eb CO |
529 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
530 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
531 | ||
dab4079d | 532 | might_fault(); |
8f2abe6a CB |
533 | |
534 | do { | |
535 | __vcpu_run(vcpu); | |
8f2abe6a CB |
536 | rc = kvm_handle_sie_intercept(vcpu); |
537 | } while (!signal_pending(current) && !rc); | |
538 | ||
9ace903d CE |
539 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
540 | goto rerun_vcpu; | |
541 | ||
b1d16c49 CE |
542 | if (signal_pending(current) && !rc) { |
543 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 544 | rc = -EINTR; |
b1d16c49 | 545 | } |
8f2abe6a | 546 | |
b8e660b8 | 547 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
548 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
549 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
550 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
551 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
552 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
553 | rc = 0; | |
554 | } | |
555 | ||
556 | if (rc == -EREMOTE) { | |
557 | /* intercept was handled, but userspace support is needed | |
558 | * kvm_run has been prepared by the handler */ | |
559 | rc = 0; | |
560 | } | |
b0c632db | 561 | |
d7b0b5eb CO |
562 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
563 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
564 | ||
b0c632db HC |
565 | if (vcpu->sigset_active) |
566 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
567 | ||
568 | vcpu_put(vcpu); | |
569 | ||
570 | vcpu->stat.exit_userspace++; | |
7e8e6ab4 | 571 | return rc; |
b0c632db HC |
572 | } |
573 | ||
574 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, | |
575 | unsigned long n, int prefix) | |
576 | { | |
577 | if (prefix) | |
578 | return copy_to_guest(vcpu, guestdest, from, n); | |
579 | else | |
580 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
581 | } | |
582 | ||
583 | /* | |
584 | * store status at address | |
585 | * we use have two special cases: | |
586 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
587 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
588 | */ | |
589 | int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
590 | { | |
591 | const unsigned char archmode = 1; | |
592 | int prefix; | |
593 | ||
594 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
595 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
596 | return -EFAULT; | |
597 | addr = SAVE_AREA_BASE; | |
598 | prefix = 0; | |
599 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
600 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
601 | return -EFAULT; | |
602 | addr = SAVE_AREA_BASE; | |
603 | prefix = 1; | |
604 | } else | |
605 | prefix = 0; | |
606 | ||
f64ca217 | 607 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
608 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
609 | return -EFAULT; | |
610 | ||
f64ca217 | 611 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
b0c632db HC |
612 | vcpu->arch.guest_gprs, 128, prefix)) |
613 | return -EFAULT; | |
614 | ||
f64ca217 | 615 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
616 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
617 | return -EFAULT; | |
618 | ||
f64ca217 | 619 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
620 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
621 | return -EFAULT; | |
622 | ||
623 | if (__guestcopy(vcpu, | |
f64ca217 | 624 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
625 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
626 | return -EFAULT; | |
627 | ||
f64ca217 | 628 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
629 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
630 | return -EFAULT; | |
631 | ||
f64ca217 | 632 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
633 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
634 | return -EFAULT; | |
635 | ||
f64ca217 | 636 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
637 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
638 | return -EFAULT; | |
639 | ||
f64ca217 | 640 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
b0c632db HC |
641 | &vcpu->arch.guest_acrs, 64, prefix)) |
642 | return -EFAULT; | |
643 | ||
644 | if (__guestcopy(vcpu, | |
f64ca217 | 645 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
646 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
647 | return -EFAULT; | |
648 | return 0; | |
649 | } | |
650 | ||
651 | static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
652 | { | |
653 | int rc; | |
654 | ||
655 | vcpu_load(vcpu); | |
656 | rc = __kvm_s390_vcpu_store_status(vcpu, addr); | |
657 | vcpu_put(vcpu); | |
658 | return rc; | |
659 | } | |
660 | ||
661 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
662 | unsigned int ioctl, unsigned long arg) | |
663 | { | |
664 | struct kvm_vcpu *vcpu = filp->private_data; | |
665 | void __user *argp = (void __user *)arg; | |
666 | ||
667 | switch (ioctl) { | |
ba5c1e9b CO |
668 | case KVM_S390_INTERRUPT: { |
669 | struct kvm_s390_interrupt s390int; | |
670 | ||
671 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
672 | return -EFAULT; | |
673 | return kvm_s390_inject_vcpu(vcpu, &s390int); | |
674 | } | |
b0c632db HC |
675 | case KVM_S390_STORE_STATUS: |
676 | return kvm_s390_vcpu_store_status(vcpu, arg); | |
677 | case KVM_S390_SET_INITIAL_PSW: { | |
678 | psw_t psw; | |
679 | ||
680 | if (copy_from_user(&psw, argp, sizeof(psw))) | |
681 | return -EFAULT; | |
682 | return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
683 | } | |
684 | case KVM_S390_INITIAL_RESET: | |
685 | return kvm_arch_vcpu_ioctl_initial_reset(vcpu); | |
686 | default: | |
687 | ; | |
688 | } | |
689 | return -EINVAL; | |
690 | } | |
691 | ||
692 | /* Section: memory related */ | |
693 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
694 | struct kvm_userspace_memory_region *mem, | |
695 | struct kvm_memory_slot old, | |
696 | int user_alloc) | |
697 | { | |
2668dab7 | 698 | int i; |
988a2cae | 699 | struct kvm_vcpu *vcpu; |
2668dab7 | 700 | |
b0c632db HC |
701 | /* A few sanity checks. We can have exactly one memory slot which has |
702 | to start at guest virtual zero and which has to be located at a | |
703 | page boundary in userland and which has to end at a page boundary. | |
704 | The memory in userland is ok to be fragmented into various different | |
705 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
706 | doing this call at any time */ | |
707 | ||
628eb9b8 | 708 | if (mem->slot) |
b0c632db HC |
709 | return -EINVAL; |
710 | ||
711 | if (mem->guest_phys_addr) | |
712 | return -EINVAL; | |
713 | ||
714 | if (mem->userspace_addr & (PAGE_SIZE - 1)) | |
715 | return -EINVAL; | |
716 | ||
717 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
718 | return -EINVAL; | |
719 | ||
2668dab7 CO |
720 | if (!user_alloc) |
721 | return -EINVAL; | |
722 | ||
628eb9b8 | 723 | /* request update of sie control block for all available vcpus */ |
988a2cae GN |
724 | kvm_for_each_vcpu(i, vcpu, kvm) { |
725 | if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
726 | continue; | |
727 | kvm_s390_inject_sigp_stop(vcpu, ACTION_RELOADVCPU_ON_STOP); | |
2668dab7 | 728 | } |
b0c632db HC |
729 | |
730 | return 0; | |
731 | } | |
732 | ||
34d4cb8f MT |
733 | void kvm_arch_flush_shadow(struct kvm *kvm) |
734 | { | |
735 | } | |
736 | ||
b0c632db HC |
737 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
738 | { | |
739 | return gfn; | |
740 | } | |
741 | ||
742 | static int __init kvm_s390_init(void) | |
743 | { | |
ef50f7ac CB |
744 | int ret; |
745 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE); | |
746 | if (ret) | |
747 | return ret; | |
748 | ||
749 | /* | |
750 | * guests can ask for up to 255+1 double words, we need a full page | |
751 | * to hold the maximum amount of facilites. On the other hand, we | |
752 | * only set facilities that are known to work in KVM. | |
753 | */ | |
754 | facilities = (unsigned long long *) get_zeroed_page(GFP_DMA); | |
755 | if (!facilities) { | |
756 | kvm_exit(); | |
757 | return -ENOMEM; | |
758 | } | |
759 | stfle(facilities, 1); | |
760 | facilities[0] &= 0xff00fff3f0700000ULL; | |
761 | return 0; | |
b0c632db HC |
762 | } |
763 | ||
764 | static void __exit kvm_s390_exit(void) | |
765 | { | |
ef50f7ac | 766 | free_page((unsigned long) facilities); |
b0c632db HC |
767 | kvm_exit(); |
768 | } | |
769 | ||
770 | module_init(kvm_s390_init); | |
771 | module_exit(kvm_s390_exit); |