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> | |
ca872302 | 18 | #include <linux/hrtimer.h> |
b0c632db HC |
19 | #include <linux/init.h> |
20 | #include <linux/kvm.h> | |
21 | #include <linux/kvm_host.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/slab.h> | |
ba5c1e9b | 24 | #include <linux/timer.h> |
b0c632db HC |
25 | #include <asm/lowcore.h> |
26 | #include <asm/pgtable.h> | |
f5daba1d | 27 | #include <asm/nmi.h> |
ef50f7ac | 28 | #include <asm/system.h> |
8f2abe6a | 29 | #include "kvm-s390.h" |
b0c632db HC |
30 | #include "gaccess.h" |
31 | ||
32 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
33 | ||
34 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
35 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 36 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
37 | { "exit_validity", VCPU_STAT(exit_validity) }, |
38 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
39 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
40 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
41 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
42 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
43 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f5e10b09 | 44 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b CO |
45 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
46 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, | |
47 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, | |
48 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
49 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
50 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
51 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
52 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
53 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
453423dc CB |
54 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
55 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
56 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
57 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
58 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
59 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
60 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
61 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
62 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
5288fbf0 CB |
63 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
64 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, | |
65 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
66 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
67 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
68 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
e28acfea | 69 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
b0c632db HC |
70 | { NULL } |
71 | }; | |
72 | ||
ef50f7ac | 73 | static unsigned long long *facilities; |
b0c632db HC |
74 | |
75 | /* Section: not file related */ | |
76 | void kvm_arch_hardware_enable(void *garbage) | |
77 | { | |
78 | /* every s390 is virtualization enabled ;-) */ | |
79 | } | |
80 | ||
81 | void kvm_arch_hardware_disable(void *garbage) | |
82 | { | |
83 | } | |
84 | ||
b0c632db HC |
85 | int kvm_arch_hardware_setup(void) |
86 | { | |
87 | return 0; | |
88 | } | |
89 | ||
90 | void kvm_arch_hardware_unsetup(void) | |
91 | { | |
92 | } | |
93 | ||
94 | void kvm_arch_check_processor_compat(void *rtn) | |
95 | { | |
96 | } | |
97 | ||
98 | int kvm_arch_init(void *opaque) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | ||
103 | void kvm_arch_exit(void) | |
104 | { | |
105 | } | |
106 | ||
107 | /* Section: device related */ | |
108 | long kvm_arch_dev_ioctl(struct file *filp, | |
109 | unsigned int ioctl, unsigned long arg) | |
110 | { | |
111 | if (ioctl == KVM_S390_ENABLE_SIE) | |
112 | return s390_enable_sie(); | |
113 | return -EINVAL; | |
114 | } | |
115 | ||
116 | int kvm_dev_ioctl_check_extension(long ext) | |
117 | { | |
2bd0ac4e | 118 | switch (ext) { |
2bd0ac4e CO |
119 | default: |
120 | return 0; | |
121 | } | |
b0c632db HC |
122 | } |
123 | ||
124 | /* Section: vm related */ | |
125 | /* | |
126 | * Get (and clear) the dirty memory log for a memory slot. | |
127 | */ | |
128 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
129 | struct kvm_dirty_log *log) | |
130 | { | |
131 | return 0; | |
132 | } | |
133 | ||
134 | long kvm_arch_vm_ioctl(struct file *filp, | |
135 | unsigned int ioctl, unsigned long arg) | |
136 | { | |
137 | struct kvm *kvm = filp->private_data; | |
138 | void __user *argp = (void __user *)arg; | |
139 | int r; | |
140 | ||
141 | switch (ioctl) { | |
ba5c1e9b CO |
142 | case KVM_S390_INTERRUPT: { |
143 | struct kvm_s390_interrupt s390int; | |
144 | ||
145 | r = -EFAULT; | |
146 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
147 | break; | |
148 | r = kvm_s390_inject_vm(kvm, &s390int); | |
149 | break; | |
150 | } | |
b0c632db HC |
151 | default: |
152 | r = -EINVAL; | |
153 | } | |
154 | ||
155 | return r; | |
156 | } | |
157 | ||
158 | struct kvm *kvm_arch_create_vm(void) | |
159 | { | |
160 | struct kvm *kvm; | |
161 | int rc; | |
162 | char debug_name[16]; | |
163 | ||
164 | rc = s390_enable_sie(); | |
165 | if (rc) | |
166 | goto out_nokvm; | |
167 | ||
168 | rc = -ENOMEM; | |
169 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
170 | if (!kvm) | |
171 | goto out_nokvm; | |
172 | ||
173 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); | |
174 | if (!kvm->arch.sca) | |
175 | goto out_nosca; | |
176 | ||
177 | sprintf(debug_name, "kvm-%u", current->pid); | |
178 | ||
179 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
180 | if (!kvm->arch.dbf) | |
181 | goto out_nodbf; | |
182 | ||
ba5c1e9b CO |
183 | spin_lock_init(&kvm->arch.float_int.lock); |
184 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
185 | ||
b0c632db HC |
186 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
187 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
188 | ||
b0c632db HC |
189 | return kvm; |
190 | out_nodbf: | |
191 | free_page((unsigned long)(kvm->arch.sca)); | |
192 | out_nosca: | |
193 | kfree(kvm); | |
194 | out_nokvm: | |
195 | return ERR_PTR(rc); | |
196 | } | |
197 | ||
d329c035 CB |
198 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
199 | { | |
200 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
abf4a71e CO |
201 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
202 | (__u64) vcpu->arch.sie_block) | |
203 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
204 | smp_mb(); | |
d329c035 | 205 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 206 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
207 | kfree(vcpu); |
208 | } | |
209 | ||
210 | static void kvm_free_vcpus(struct kvm *kvm) | |
211 | { | |
212 | unsigned int i; | |
213 | ||
214 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
215 | if (kvm->vcpus[i]) { | |
216 | kvm_arch_vcpu_destroy(kvm->vcpus[i]); | |
217 | kvm->vcpus[i] = NULL; | |
218 | } | |
219 | } | |
220 | } | |
221 | ||
ad8ba2cd SY |
222 | void kvm_arch_sync_events(struct kvm *kvm) |
223 | { | |
224 | } | |
225 | ||
b0c632db HC |
226 | void kvm_arch_destroy_vm(struct kvm *kvm) |
227 | { | |
d329c035 | 228 | kvm_free_vcpus(kvm); |
dfdded7c | 229 | kvm_free_physmem(kvm); |
b0c632db | 230 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 231 | debug_unregister(kvm->arch.dbf); |
b0c632db | 232 | kfree(kvm); |
b0c632db HC |
233 | } |
234 | ||
235 | /* Section: vcpu related */ | |
236 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
237 | { | |
238 | return 0; | |
239 | } | |
240 | ||
241 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
242 | { | |
6692cef3 | 243 | /* Nothing todo */ |
b0c632db HC |
244 | } |
245 | ||
246 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
247 | { | |
248 | save_fp_regs(&vcpu->arch.host_fpregs); | |
249 | save_access_regs(vcpu->arch.host_acrs); | |
250 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
251 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
252 | restore_access_regs(vcpu->arch.guest_acrs); | |
b0c632db HC |
253 | } |
254 | ||
255 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
256 | { | |
257 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
258 | save_access_regs(vcpu->arch.guest_acrs); | |
259 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
260 | restore_access_regs(vcpu->arch.host_acrs); | |
261 | } | |
262 | ||
263 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
264 | { | |
265 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
266 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
267 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
268 | vcpu->arch.sie_block->prefix = 0UL; | |
269 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
270 | vcpu->arch.sie_block->cputm = 0UL; | |
271 | vcpu->arch.sie_block->ckc = 0UL; | |
272 | vcpu->arch.sie_block->todpr = 0; | |
273 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
274 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
275 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
276 | vcpu->arch.guest_fpregs.fpc = 0; | |
277 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
278 | vcpu->arch.sie_block->gbea = 1; | |
279 | } | |
280 | ||
4da29e90 CB |
281 | /* The current code can have up to 256 pages for virtio */ |
282 | #define VIRTIODESCSPACE (256ul * 4096ul) | |
283 | ||
b0c632db HC |
284 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
285 | { | |
286 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); | |
4da29e90 CB |
287 | vcpu->arch.sie_block->gmslm = vcpu->kvm->arch.guest_memsize + |
288 | vcpu->kvm->arch.guest_origin + | |
289 | VIRTIODESCSPACE - 1ul; | |
290 | vcpu->arch.sie_block->gmsor = vcpu->kvm->arch.guest_origin; | |
b0c632db HC |
291 | vcpu->arch.sie_block->ecb = 2; |
292 | vcpu->arch.sie_block->eca = 0xC1002001U; | |
ef50f7ac | 293 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
294 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
295 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
296 | (unsigned long) vcpu); | |
297 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 298 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 299 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
300 | return 0; |
301 | } | |
302 | ||
303 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
304 | unsigned int id) | |
305 | { | |
306 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
307 | int rc = -ENOMEM; | |
308 | ||
309 | if (!vcpu) | |
310 | goto out_nomem; | |
311 | ||
180c12fb CB |
312 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
313 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
314 | |
315 | if (!vcpu->arch.sie_block) | |
316 | goto out_free_cpu; | |
317 | ||
318 | vcpu->arch.sie_block->icpua = id; | |
319 | BUG_ON(!kvm->arch.sca); | |
abf4a71e CO |
320 | if (!kvm->arch.sca->cpu[id].sda) |
321 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
322 | else | |
323 | BUG_ON(!kvm->vcpus[id]); /* vcpu does already exist */ | |
b0c632db HC |
324 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
325 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
326 | ||
ba5c1e9b CO |
327 | spin_lock_init(&vcpu->arch.local_int.lock); |
328 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
329 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 330 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
331 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
332 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 333 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 334 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 335 | |
b0c632db HC |
336 | rc = kvm_vcpu_init(vcpu, kvm, id); |
337 | if (rc) | |
338 | goto out_free_cpu; | |
339 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, | |
340 | vcpu->arch.sie_block); | |
341 | ||
b0c632db HC |
342 | return vcpu; |
343 | out_free_cpu: | |
344 | kfree(vcpu); | |
345 | out_nomem: | |
346 | return ERR_PTR(rc); | |
347 | } | |
348 | ||
b0c632db HC |
349 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
350 | { | |
351 | /* kvm common code refers to this, but never calls it */ | |
352 | BUG(); | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
357 | { | |
358 | vcpu_load(vcpu); | |
359 | kvm_s390_vcpu_initial_reset(vcpu); | |
360 | vcpu_put(vcpu); | |
361 | return 0; | |
362 | } | |
363 | ||
364 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
365 | { | |
366 | vcpu_load(vcpu); | |
367 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); | |
368 | vcpu_put(vcpu); | |
369 | return 0; | |
370 | } | |
371 | ||
372 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
373 | { | |
374 | vcpu_load(vcpu); | |
375 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); | |
376 | vcpu_put(vcpu); | |
377 | return 0; | |
378 | } | |
379 | ||
380 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
381 | struct kvm_sregs *sregs) | |
382 | { | |
383 | vcpu_load(vcpu); | |
384 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); | |
385 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
386 | vcpu_put(vcpu); | |
387 | return 0; | |
388 | } | |
389 | ||
390 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
391 | struct kvm_sregs *sregs) | |
392 | { | |
393 | vcpu_load(vcpu); | |
394 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); | |
395 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
396 | vcpu_put(vcpu); | |
397 | return 0; | |
398 | } | |
399 | ||
400 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
401 | { | |
402 | vcpu_load(vcpu); | |
403 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); | |
404 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
405 | vcpu_put(vcpu); | |
406 | return 0; | |
407 | } | |
408 | ||
409 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
410 | { | |
411 | vcpu_load(vcpu); | |
412 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); | |
413 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
414 | vcpu_put(vcpu); | |
415 | return 0; | |
416 | } | |
417 | ||
418 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
419 | { | |
420 | int rc = 0; | |
421 | ||
422 | vcpu_load(vcpu); | |
423 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) | |
424 | rc = -EBUSY; | |
425 | else | |
426 | vcpu->arch.sie_block->gpsw = psw; | |
427 | vcpu_put(vcpu); | |
428 | return rc; | |
429 | } | |
430 | ||
431 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
432 | struct kvm_translation *tr) | |
433 | { | |
434 | return -EINVAL; /* not implemented yet */ | |
435 | } | |
436 | ||
d0bfb940 JK |
437 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
438 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
439 | { |
440 | return -EINVAL; /* not implemented yet */ | |
441 | } | |
442 | ||
62d9f0db MT |
443 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
444 | struct kvm_mp_state *mp_state) | |
445 | { | |
446 | return -EINVAL; /* not implemented yet */ | |
447 | } | |
448 | ||
449 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
450 | struct kvm_mp_state *mp_state) | |
451 | { | |
452 | return -EINVAL; /* not implemented yet */ | |
453 | } | |
454 | ||
b0c632db HC |
455 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
456 | { | |
457 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
458 | ||
459 | if (need_resched()) | |
460 | schedule(); | |
461 | ||
71cde587 CB |
462 | if (test_thread_flag(TIF_MCCK_PENDING)) |
463 | s390_handle_mcck(); | |
464 | ||
0ff31867 CO |
465 | kvm_s390_deliver_pending_interrupts(vcpu); |
466 | ||
b0c632db HC |
467 | vcpu->arch.sie_block->icptcode = 0; |
468 | local_irq_disable(); | |
469 | kvm_guest_enter(); | |
470 | local_irq_enable(); | |
471 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
472 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
1f0d0f09 CO |
473 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
474 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
475 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
476 | } | |
b0c632db HC |
477 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
478 | vcpu->arch.sie_block->icptcode); | |
479 | local_irq_disable(); | |
480 | kvm_guest_exit(); | |
481 | local_irq_enable(); | |
482 | ||
483 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
484 | } | |
485 | ||
486 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
487 | { | |
8f2abe6a | 488 | int rc; |
b0c632db HC |
489 | sigset_t sigsaved; |
490 | ||
491 | vcpu_load(vcpu); | |
492 | ||
9ace903d | 493 | rerun_vcpu: |
51e4d5ab CO |
494 | /* verify, that memory has been registered */ |
495 | if (!vcpu->kvm->arch.guest_memsize) { | |
496 | vcpu_put(vcpu); | |
497 | return -EINVAL; | |
498 | } | |
499 | ||
b0c632db HC |
500 | if (vcpu->sigset_active) |
501 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
502 | ||
503 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
504 | ||
ba5c1e9b CO |
505 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
506 | ||
8f2abe6a CB |
507 | switch (kvm_run->exit_reason) { |
508 | case KVM_EXIT_S390_SIEIC: | |
509 | vcpu->arch.sie_block->gpsw.mask = kvm_run->s390_sieic.mask; | |
510 | vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr; | |
511 | break; | |
512 | case KVM_EXIT_UNKNOWN: | |
9ace903d | 513 | case KVM_EXIT_INTR: |
8f2abe6a CB |
514 | case KVM_EXIT_S390_RESET: |
515 | break; | |
516 | default: | |
517 | BUG(); | |
518 | } | |
519 | ||
dab4079d | 520 | might_fault(); |
8f2abe6a CB |
521 | |
522 | do { | |
523 | __vcpu_run(vcpu); | |
8f2abe6a CB |
524 | rc = kvm_handle_sie_intercept(vcpu); |
525 | } while (!signal_pending(current) && !rc); | |
526 | ||
9ace903d CE |
527 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
528 | goto rerun_vcpu; | |
529 | ||
b1d16c49 CE |
530 | if (signal_pending(current) && !rc) { |
531 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 532 | rc = -EINTR; |
b1d16c49 | 533 | } |
8f2abe6a CB |
534 | |
535 | if (rc == -ENOTSUPP) { | |
536 | /* intercept cannot be handled in-kernel, prepare kvm-run */ | |
537 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
538 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
539 | kvm_run->s390_sieic.mask = vcpu->arch.sie_block->gpsw.mask; | |
540 | kvm_run->s390_sieic.addr = vcpu->arch.sie_block->gpsw.addr; | |
541 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; | |
542 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
543 | rc = 0; | |
544 | } | |
545 | ||
546 | if (rc == -EREMOTE) { | |
547 | /* intercept was handled, but userspace support is needed | |
548 | * kvm_run has been prepared by the handler */ | |
549 | rc = 0; | |
550 | } | |
b0c632db HC |
551 | |
552 | if (vcpu->sigset_active) | |
553 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
554 | ||
555 | vcpu_put(vcpu); | |
556 | ||
557 | vcpu->stat.exit_userspace++; | |
7e8e6ab4 | 558 | return rc; |
b0c632db HC |
559 | } |
560 | ||
561 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, | |
562 | unsigned long n, int prefix) | |
563 | { | |
564 | if (prefix) | |
565 | return copy_to_guest(vcpu, guestdest, from, n); | |
566 | else | |
567 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
568 | } | |
569 | ||
570 | /* | |
571 | * store status at address | |
572 | * we use have two special cases: | |
573 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
574 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
575 | */ | |
576 | int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
577 | { | |
578 | const unsigned char archmode = 1; | |
579 | int prefix; | |
580 | ||
581 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
582 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
583 | return -EFAULT; | |
584 | addr = SAVE_AREA_BASE; | |
585 | prefix = 0; | |
586 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
587 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
588 | return -EFAULT; | |
589 | addr = SAVE_AREA_BASE; | |
590 | prefix = 1; | |
591 | } else | |
592 | prefix = 0; | |
593 | ||
594 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, fp_regs), | |
595 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) | |
596 | return -EFAULT; | |
597 | ||
598 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, gp_regs), | |
599 | vcpu->arch.guest_gprs, 128, prefix)) | |
600 | return -EFAULT; | |
601 | ||
602 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, psw), | |
603 | &vcpu->arch.sie_block->gpsw, 16, prefix)) | |
604 | return -EFAULT; | |
605 | ||
606 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, pref_reg), | |
607 | &vcpu->arch.sie_block->prefix, 4, prefix)) | |
608 | return -EFAULT; | |
609 | ||
610 | if (__guestcopy(vcpu, | |
611 | addr + offsetof(struct save_area_s390x, fp_ctrl_reg), | |
612 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) | |
613 | return -EFAULT; | |
614 | ||
615 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, tod_reg), | |
616 | &vcpu->arch.sie_block->todpr, 4, prefix)) | |
617 | return -EFAULT; | |
618 | ||
619 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, timer), | |
620 | &vcpu->arch.sie_block->cputm, 8, prefix)) | |
621 | return -EFAULT; | |
622 | ||
623 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, clk_cmp), | |
624 | &vcpu->arch.sie_block->ckc, 8, prefix)) | |
625 | return -EFAULT; | |
626 | ||
627 | if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, acc_regs), | |
628 | &vcpu->arch.guest_acrs, 64, prefix)) | |
629 | return -EFAULT; | |
630 | ||
631 | if (__guestcopy(vcpu, | |
632 | addr + offsetof(struct save_area_s390x, ctrl_regs), | |
633 | &vcpu->arch.sie_block->gcr, 128, prefix)) | |
634 | return -EFAULT; | |
635 | return 0; | |
636 | } | |
637 | ||
638 | static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) | |
639 | { | |
640 | int rc; | |
641 | ||
642 | vcpu_load(vcpu); | |
643 | rc = __kvm_s390_vcpu_store_status(vcpu, addr); | |
644 | vcpu_put(vcpu); | |
645 | return rc; | |
646 | } | |
647 | ||
648 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
649 | unsigned int ioctl, unsigned long arg) | |
650 | { | |
651 | struct kvm_vcpu *vcpu = filp->private_data; | |
652 | void __user *argp = (void __user *)arg; | |
653 | ||
654 | switch (ioctl) { | |
ba5c1e9b CO |
655 | case KVM_S390_INTERRUPT: { |
656 | struct kvm_s390_interrupt s390int; | |
657 | ||
658 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
659 | return -EFAULT; | |
660 | return kvm_s390_inject_vcpu(vcpu, &s390int); | |
661 | } | |
b0c632db HC |
662 | case KVM_S390_STORE_STATUS: |
663 | return kvm_s390_vcpu_store_status(vcpu, arg); | |
664 | case KVM_S390_SET_INITIAL_PSW: { | |
665 | psw_t psw; | |
666 | ||
667 | if (copy_from_user(&psw, argp, sizeof(psw))) | |
668 | return -EFAULT; | |
669 | return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
670 | } | |
671 | case KVM_S390_INITIAL_RESET: | |
672 | return kvm_arch_vcpu_ioctl_initial_reset(vcpu); | |
673 | default: | |
674 | ; | |
675 | } | |
676 | return -EINVAL; | |
677 | } | |
678 | ||
679 | /* Section: memory related */ | |
680 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
681 | struct kvm_userspace_memory_region *mem, | |
682 | struct kvm_memory_slot old, | |
683 | int user_alloc) | |
684 | { | |
2668dab7 CO |
685 | int i; |
686 | ||
b0c632db HC |
687 | /* A few sanity checks. We can have exactly one memory slot which has |
688 | to start at guest virtual zero and which has to be located at a | |
689 | page boundary in userland and which has to end at a page boundary. | |
690 | The memory in userland is ok to be fragmented into various different | |
691 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
692 | doing this call at any time */ | |
693 | ||
2668dab7 | 694 | if (mem->slot || kvm->arch.guest_memsize) |
b0c632db HC |
695 | return -EINVAL; |
696 | ||
697 | if (mem->guest_phys_addr) | |
698 | return -EINVAL; | |
699 | ||
700 | if (mem->userspace_addr & (PAGE_SIZE - 1)) | |
701 | return -EINVAL; | |
702 | ||
703 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
704 | return -EINVAL; | |
705 | ||
2668dab7 CO |
706 | if (!user_alloc) |
707 | return -EINVAL; | |
708 | ||
709 | /* lock all vcpus */ | |
710 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
711 | if (!kvm->vcpus[i]) | |
712 | continue; | |
713 | if (!mutex_trylock(&kvm->vcpus[i]->mutex)) | |
714 | goto fail_out; | |
715 | } | |
716 | ||
b0c632db HC |
717 | kvm->arch.guest_origin = mem->userspace_addr; |
718 | kvm->arch.guest_memsize = mem->memory_size; | |
719 | ||
2668dab7 CO |
720 | /* update sie control blocks, and unlock all vcpus */ |
721 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
722 | if (kvm->vcpus[i]) { | |
723 | kvm->vcpus[i]->arch.sie_block->gmsor = | |
724 | kvm->arch.guest_origin; | |
725 | kvm->vcpus[i]->arch.sie_block->gmslm = | |
726 | kvm->arch.guest_memsize + | |
727 | kvm->arch.guest_origin + | |
728 | VIRTIODESCSPACE - 1ul; | |
729 | mutex_unlock(&kvm->vcpus[i]->mutex); | |
730 | } | |
731 | } | |
b0c632db HC |
732 | |
733 | return 0; | |
2668dab7 CO |
734 | |
735 | fail_out: | |
736 | for (; i >= 0; i--) | |
737 | mutex_unlock(&kvm->vcpus[i]->mutex); | |
738 | return -EINVAL; | |
b0c632db HC |
739 | } |
740 | ||
34d4cb8f MT |
741 | void kvm_arch_flush_shadow(struct kvm *kvm) |
742 | { | |
743 | } | |
744 | ||
b0c632db HC |
745 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
746 | { | |
747 | return gfn; | |
748 | } | |
749 | ||
750 | static int __init kvm_s390_init(void) | |
751 | { | |
ef50f7ac CB |
752 | int ret; |
753 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE); | |
754 | if (ret) | |
755 | return ret; | |
756 | ||
757 | /* | |
758 | * guests can ask for up to 255+1 double words, we need a full page | |
759 | * to hold the maximum amount of facilites. On the other hand, we | |
760 | * only set facilities that are known to work in KVM. | |
761 | */ | |
762 | facilities = (unsigned long long *) get_zeroed_page(GFP_DMA); | |
763 | if (!facilities) { | |
764 | kvm_exit(); | |
765 | return -ENOMEM; | |
766 | } | |
767 | stfle(facilities, 1); | |
768 | facilities[0] &= 0xff00fff3f0700000ULL; | |
769 | return 0; | |
b0c632db HC |
770 | } |
771 | ||
772 | static void __exit kvm_s390_exit(void) | |
773 | { | |
ef50f7ac | 774 | free_page((unsigned long) facilities); |
b0c632db HC |
775 | kvm_exit(); |
776 | } | |
777 | ||
778 | module_init(kvm_s390_init); | |
779 | module_exit(kvm_s390_exit); |