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