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) }, | |
7697e71f | 49 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
50 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
51 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
52 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
53 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
54 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
55 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
56 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
453423dc CB |
57 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
58 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
59 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
60 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
61 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
62 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
63 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
64 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
65 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 66 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 67 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 68 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 69 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
70 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
71 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
72 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
73 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
74 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 75 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 76 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
b0c632db HC |
77 | { NULL } |
78 | }; | |
79 | ||
ef50f7ac | 80 | static unsigned long long *facilities; |
b0c632db HC |
81 | |
82 | /* Section: not file related */ | |
10474ae8 | 83 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
84 | { |
85 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 86 | return 0; |
b0c632db HC |
87 | } |
88 | ||
89 | void kvm_arch_hardware_disable(void *garbage) | |
90 | { | |
91 | } | |
92 | ||
b0c632db HC |
93 | int kvm_arch_hardware_setup(void) |
94 | { | |
95 | return 0; | |
96 | } | |
97 | ||
98 | void kvm_arch_hardware_unsetup(void) | |
99 | { | |
100 | } | |
101 | ||
102 | void kvm_arch_check_processor_compat(void *rtn) | |
103 | { | |
104 | } | |
105 | ||
106 | int kvm_arch_init(void *opaque) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | ||
111 | void kvm_arch_exit(void) | |
112 | { | |
113 | } | |
114 | ||
115 | /* Section: device related */ | |
116 | long kvm_arch_dev_ioctl(struct file *filp, | |
117 | unsigned int ioctl, unsigned long arg) | |
118 | { | |
119 | if (ioctl == KVM_S390_ENABLE_SIE) | |
120 | return s390_enable_sie(); | |
121 | return -EINVAL; | |
122 | } | |
123 | ||
124 | int kvm_dev_ioctl_check_extension(long ext) | |
125 | { | |
d7b0b5eb CO |
126 | int r; |
127 | ||
2bd0ac4e | 128 | switch (ext) { |
d7b0b5eb | 129 | case KVM_CAP_S390_PSW: |
b6cf8788 | 130 | case KVM_CAP_S390_GMAP: |
52e16b18 | 131 | case KVM_CAP_SYNC_MMU: |
d7b0b5eb CO |
132 | r = 1; |
133 | break; | |
2bd0ac4e | 134 | default: |
d7b0b5eb | 135 | r = 0; |
2bd0ac4e | 136 | } |
d7b0b5eb | 137 | return r; |
b0c632db HC |
138 | } |
139 | ||
140 | /* Section: vm related */ | |
141 | /* | |
142 | * Get (and clear) the dirty memory log for a memory slot. | |
143 | */ | |
144 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
145 | struct kvm_dirty_log *log) | |
146 | { | |
147 | return 0; | |
148 | } | |
149 | ||
150 | long kvm_arch_vm_ioctl(struct file *filp, | |
151 | unsigned int ioctl, unsigned long arg) | |
152 | { | |
153 | struct kvm *kvm = filp->private_data; | |
154 | void __user *argp = (void __user *)arg; | |
155 | int r; | |
156 | ||
157 | switch (ioctl) { | |
ba5c1e9b CO |
158 | case KVM_S390_INTERRUPT: { |
159 | struct kvm_s390_interrupt s390int; | |
160 | ||
161 | r = -EFAULT; | |
162 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
163 | break; | |
164 | r = kvm_s390_inject_vm(kvm, &s390int); | |
165 | break; | |
166 | } | |
b0c632db | 167 | default: |
367e1319 | 168 | r = -ENOTTY; |
b0c632db HC |
169 | } |
170 | ||
171 | return r; | |
172 | } | |
173 | ||
e08b9637 | 174 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 175 | { |
b0c632db HC |
176 | int rc; |
177 | char debug_name[16]; | |
178 | ||
e08b9637 CO |
179 | rc = -EINVAL; |
180 | #ifdef CONFIG_KVM_S390_UCONTROL | |
181 | if (type & ~KVM_VM_S390_UCONTROL) | |
182 | goto out_err; | |
183 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
184 | goto out_err; | |
185 | #else | |
186 | if (type) | |
187 | goto out_err; | |
188 | #endif | |
189 | ||
b0c632db HC |
190 | rc = s390_enable_sie(); |
191 | if (rc) | |
d89f5eff | 192 | goto out_err; |
b0c632db | 193 | |
b290411a CO |
194 | rc = -ENOMEM; |
195 | ||
b0c632db HC |
196 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
197 | if (!kvm->arch.sca) | |
d89f5eff | 198 | goto out_err; |
b0c632db HC |
199 | |
200 | sprintf(debug_name, "kvm-%u", current->pid); | |
201 | ||
202 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
203 | if (!kvm->arch.dbf) | |
204 | goto out_nodbf; | |
205 | ||
ba5c1e9b CO |
206 | spin_lock_init(&kvm->arch.float_int.lock); |
207 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
208 | ||
b0c632db HC |
209 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
210 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
211 | ||
e08b9637 CO |
212 | if (type & KVM_VM_S390_UCONTROL) { |
213 | kvm->arch.gmap = NULL; | |
214 | } else { | |
215 | kvm->arch.gmap = gmap_alloc(current->mm); | |
216 | if (!kvm->arch.gmap) | |
217 | goto out_nogmap; | |
218 | } | |
d89f5eff | 219 | return 0; |
598841ca CO |
220 | out_nogmap: |
221 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
222 | out_nodbf: |
223 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
224 | out_err: |
225 | return rc; | |
b0c632db HC |
226 | } |
227 | ||
d329c035 CB |
228 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
229 | { | |
230 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
fc34531d | 231 | clear_bit(63 - vcpu->vcpu_id, (unsigned long *) &vcpu->kvm->arch.sca->mcn); |
abf4a71e CO |
232 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
233 | (__u64) vcpu->arch.sie_block) | |
234 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
235 | smp_mb(); | |
27e0393f CO |
236 | |
237 | if (kvm_is_ucontrol(vcpu->kvm)) | |
238 | gmap_free(vcpu->arch.gmap); | |
239 | ||
d329c035 | 240 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 241 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
242 | kfree(vcpu); |
243 | } | |
244 | ||
245 | static void kvm_free_vcpus(struct kvm *kvm) | |
246 | { | |
247 | unsigned int i; | |
988a2cae | 248 | struct kvm_vcpu *vcpu; |
d329c035 | 249 | |
988a2cae GN |
250 | kvm_for_each_vcpu(i, vcpu, kvm) |
251 | kvm_arch_vcpu_destroy(vcpu); | |
252 | ||
253 | mutex_lock(&kvm->lock); | |
254 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
255 | kvm->vcpus[i] = NULL; | |
256 | ||
257 | atomic_set(&kvm->online_vcpus, 0); | |
258 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
259 | } |
260 | ||
ad8ba2cd SY |
261 | void kvm_arch_sync_events(struct kvm *kvm) |
262 | { | |
263 | } | |
264 | ||
b0c632db HC |
265 | void kvm_arch_destroy_vm(struct kvm *kvm) |
266 | { | |
d329c035 | 267 | kvm_free_vcpus(kvm); |
b0c632db | 268 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 269 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
270 | if (!kvm_is_ucontrol(kvm)) |
271 | gmap_free(kvm->arch.gmap); | |
b0c632db HC |
272 | } |
273 | ||
274 | /* Section: vcpu related */ | |
275 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
276 | { | |
27e0393f CO |
277 | if (kvm_is_ucontrol(vcpu->kvm)) { |
278 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
279 | if (!vcpu->arch.gmap) | |
280 | return -ENOMEM; | |
281 | return 0; | |
282 | } | |
283 | ||
598841ca | 284 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
b0c632db HC |
285 | return 0; |
286 | } | |
287 | ||
288 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
289 | { | |
6692cef3 | 290 | /* Nothing todo */ |
b0c632db HC |
291 | } |
292 | ||
293 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
294 | { | |
295 | save_fp_regs(&vcpu->arch.host_fpregs); | |
296 | save_access_regs(vcpu->arch.host_acrs); | |
297 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
298 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
299 | restore_access_regs(vcpu->arch.guest_acrs); | |
480e5926 | 300 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 301 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
302 | } |
303 | ||
304 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
305 | { | |
9e6dabef | 306 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 307 | gmap_disable(vcpu->arch.gmap); |
b0c632db HC |
308 | save_fp_regs(&vcpu->arch.guest_fpregs); |
309 | save_access_regs(vcpu->arch.guest_acrs); | |
310 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
311 | restore_access_regs(vcpu->arch.host_acrs); | |
312 | } | |
313 | ||
314 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
315 | { | |
316 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
317 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
318 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
319 | vcpu->arch.sie_block->prefix = 0UL; | |
320 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
321 | vcpu->arch.sie_block->cputm = 0UL; | |
322 | vcpu->arch.sie_block->ckc = 0UL; | |
323 | vcpu->arch.sie_block->todpr = 0; | |
324 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
325 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
326 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
327 | vcpu->arch.guest_fpregs.fpc = 0; | |
328 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
329 | vcpu->arch.sie_block->gbea = 1; | |
330 | } | |
331 | ||
332 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
333 | { | |
9e6dabef CH |
334 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
335 | CPUSTAT_SM | | |
336 | CPUSTAT_STOPPED); | |
fc34531d | 337 | vcpu->arch.sie_block->ecb = 6; |
b0c632db | 338 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 339 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
340 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
341 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
342 | (unsigned long) vcpu); | |
343 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 344 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 345 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
346 | return 0; |
347 | } | |
348 | ||
349 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
350 | unsigned int id) | |
351 | { | |
4d47555a CO |
352 | struct kvm_vcpu *vcpu; |
353 | int rc = -EINVAL; | |
354 | ||
355 | if (id >= KVM_MAX_VCPUS) | |
356 | goto out; | |
357 | ||
358 | rc = -ENOMEM; | |
b0c632db | 359 | |
4d47555a | 360 | vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
b0c632db | 361 | if (!vcpu) |
4d47555a | 362 | goto out; |
b0c632db | 363 | |
180c12fb CB |
364 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
365 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
366 | |
367 | if (!vcpu->arch.sie_block) | |
368 | goto out_free_cpu; | |
369 | ||
370 | vcpu->arch.sie_block->icpua = id; | |
371 | BUG_ON(!kvm->arch.sca); | |
abf4a71e CO |
372 | if (!kvm->arch.sca->cpu[id].sda) |
373 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
b0c632db HC |
374 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
375 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
fc34531d | 376 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); |
b0c632db | 377 | |
ba5c1e9b CO |
378 | spin_lock_init(&vcpu->arch.local_int.lock); |
379 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
380 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 381 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
382 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
383 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 384 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 385 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 386 | |
b0c632db HC |
387 | rc = kvm_vcpu_init(vcpu, kvm, id); |
388 | if (rc) | |
7b06bf2f | 389 | goto out_free_sie_block; |
b0c632db HC |
390 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
391 | vcpu->arch.sie_block); | |
392 | ||
b0c632db | 393 | return vcpu; |
7b06bf2f WY |
394 | out_free_sie_block: |
395 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db HC |
396 | out_free_cpu: |
397 | kfree(vcpu); | |
4d47555a | 398 | out: |
b0c632db HC |
399 | return ERR_PTR(rc); |
400 | } | |
401 | ||
b0c632db HC |
402 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
403 | { | |
404 | /* kvm common code refers to this, but never calls it */ | |
405 | BUG(); | |
406 | return 0; | |
407 | } | |
408 | ||
409 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
410 | { | |
b0c632db | 411 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
412 | return 0; |
413 | } | |
414 | ||
415 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
416 | { | |
b0c632db | 417 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
418 | return 0; |
419 | } | |
420 | ||
421 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
422 | { | |
b0c632db | 423 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); |
b0c632db HC |
424 | return 0; |
425 | } | |
426 | ||
427 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
428 | struct kvm_sregs *sregs) | |
429 | { | |
b0c632db HC |
430 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); |
431 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
7eef87dc | 432 | restore_access_regs(vcpu->arch.guest_acrs); |
b0c632db HC |
433 | return 0; |
434 | } | |
435 | ||
436 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
437 | struct kvm_sregs *sregs) | |
438 | { | |
b0c632db HC |
439 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); |
440 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
b0c632db HC |
441 | return 0; |
442 | } | |
443 | ||
444 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
445 | { | |
b0c632db HC |
446 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
447 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
7eef87dc | 448 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
b0c632db HC |
449 | return 0; |
450 | } | |
451 | ||
452 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
453 | { | |
b0c632db HC |
454 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
455 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
456 | return 0; |
457 | } | |
458 | ||
459 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
460 | { | |
461 | int rc = 0; | |
462 | ||
9e6dabef | 463 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 464 | rc = -EBUSY; |
d7b0b5eb CO |
465 | else { |
466 | vcpu->run->psw_mask = psw.mask; | |
467 | vcpu->run->psw_addr = psw.addr; | |
468 | } | |
b0c632db HC |
469 | return rc; |
470 | } | |
471 | ||
472 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
473 | struct kvm_translation *tr) | |
474 | { | |
475 | return -EINVAL; /* not implemented yet */ | |
476 | } | |
477 | ||
d0bfb940 JK |
478 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
479 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
480 | { |
481 | return -EINVAL; /* not implemented yet */ | |
482 | } | |
483 | ||
62d9f0db MT |
484 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
485 | struct kvm_mp_state *mp_state) | |
486 | { | |
487 | return -EINVAL; /* not implemented yet */ | |
488 | } | |
489 | ||
490 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
491 | struct kvm_mp_state *mp_state) | |
492 | { | |
493 | return -EINVAL; /* not implemented yet */ | |
494 | } | |
495 | ||
e168bf8d | 496 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
b0c632db | 497 | { |
e168bf8d CO |
498 | int rc; |
499 | ||
b0c632db HC |
500 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); |
501 | ||
502 | if (need_resched()) | |
503 | schedule(); | |
504 | ||
71cde587 CB |
505 | if (test_thread_flag(TIF_MCCK_PENDING)) |
506 | s390_handle_mcck(); | |
507 | ||
d6b6d166 CO |
508 | if (!kvm_is_ucontrol(vcpu->kvm)) |
509 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 510 | |
b0c632db HC |
511 | vcpu->arch.sie_block->icptcode = 0; |
512 | local_irq_disable(); | |
513 | kvm_guest_enter(); | |
514 | local_irq_enable(); | |
515 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
516 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
e168bf8d CO |
517 | rc = sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs); |
518 | if (rc) { | |
519 | if (kvm_is_ucontrol(vcpu->kvm)) { | |
520 | rc = SIE_INTERCEPT_UCONTROL; | |
521 | } else { | |
522 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
523 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
524 | rc = 0; | |
525 | } | |
1f0d0f09 | 526 | } |
b0c632db HC |
527 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
528 | vcpu->arch.sie_block->icptcode); | |
529 | local_irq_disable(); | |
530 | kvm_guest_exit(); | |
531 | local_irq_enable(); | |
532 | ||
533 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
e168bf8d | 534 | return rc; |
b0c632db HC |
535 | } |
536 | ||
537 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
538 | { | |
8f2abe6a | 539 | int rc; |
b0c632db HC |
540 | sigset_t sigsaved; |
541 | ||
9ace903d | 542 | rerun_vcpu: |
b0c632db HC |
543 | if (vcpu->sigset_active) |
544 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
545 | ||
9e6dabef | 546 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 547 | |
ba5c1e9b CO |
548 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
549 | ||
8f2abe6a CB |
550 | switch (kvm_run->exit_reason) { |
551 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 552 | case KVM_EXIT_UNKNOWN: |
9ace903d | 553 | case KVM_EXIT_INTR: |
8f2abe6a | 554 | case KVM_EXIT_S390_RESET: |
e168bf8d | 555 | case KVM_EXIT_S390_UCONTROL: |
8f2abe6a CB |
556 | break; |
557 | default: | |
558 | BUG(); | |
559 | } | |
560 | ||
d7b0b5eb CO |
561 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
562 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
563 | ||
dab4079d | 564 | might_fault(); |
8f2abe6a CB |
565 | |
566 | do { | |
e168bf8d CO |
567 | rc = __vcpu_run(vcpu); |
568 | if (rc) | |
569 | break; | |
c0d744a9 CO |
570 | if (kvm_is_ucontrol(vcpu->kvm)) |
571 | rc = -EOPNOTSUPP; | |
572 | else | |
573 | rc = kvm_handle_sie_intercept(vcpu); | |
8f2abe6a CB |
574 | } while (!signal_pending(current) && !rc); |
575 | ||
9ace903d CE |
576 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
577 | goto rerun_vcpu; | |
578 | ||
b1d16c49 CE |
579 | if (signal_pending(current) && !rc) { |
580 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 581 | rc = -EINTR; |
b1d16c49 | 582 | } |
8f2abe6a | 583 | |
e168bf8d CO |
584 | #ifdef CONFIG_KVM_S390_UCONTROL |
585 | if (rc == SIE_INTERCEPT_UCONTROL) { | |
586 | kvm_run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
587 | kvm_run->s390_ucontrol.trans_exc_code = | |
588 | current->thread.gmap_addr; | |
589 | kvm_run->s390_ucontrol.pgm_code = 0x10; | |
590 | rc = 0; | |
591 | } | |
592 | #endif | |
593 | ||
b8e660b8 | 594 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
595 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
596 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
597 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
598 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
599 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
600 | rc = 0; | |
601 | } | |
602 | ||
603 | if (rc == -EREMOTE) { | |
604 | /* intercept was handled, but userspace support is needed | |
605 | * kvm_run has been prepared by the handler */ | |
606 | rc = 0; | |
607 | } | |
b0c632db | 608 | |
d7b0b5eb CO |
609 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
610 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
611 | ||
b0c632db HC |
612 | if (vcpu->sigset_active) |
613 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
614 | ||
b0c632db | 615 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 616 | return rc; |
b0c632db HC |
617 | } |
618 | ||
092670cd | 619 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
620 | unsigned long n, int prefix) |
621 | { | |
622 | if (prefix) | |
623 | return copy_to_guest(vcpu, guestdest, from, n); | |
624 | else | |
625 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
626 | } | |
627 | ||
628 | /* | |
629 | * store status at address | |
630 | * we use have two special cases: | |
631 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
632 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
633 | */ | |
971eb77f | 634 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 635 | { |
092670cd | 636 | unsigned char archmode = 1; |
b0c632db HC |
637 | int prefix; |
638 | ||
639 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
640 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
641 | return -EFAULT; | |
642 | addr = SAVE_AREA_BASE; | |
643 | prefix = 0; | |
644 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
645 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
646 | return -EFAULT; | |
647 | addr = SAVE_AREA_BASE; | |
648 | prefix = 1; | |
649 | } else | |
650 | prefix = 0; | |
651 | ||
f64ca217 | 652 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
653 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
654 | return -EFAULT; | |
655 | ||
f64ca217 | 656 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
b0c632db HC |
657 | vcpu->arch.guest_gprs, 128, prefix)) |
658 | return -EFAULT; | |
659 | ||
f64ca217 | 660 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
661 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
662 | return -EFAULT; | |
663 | ||
f64ca217 | 664 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
665 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
666 | return -EFAULT; | |
667 | ||
668 | if (__guestcopy(vcpu, | |
f64ca217 | 669 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
670 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
671 | return -EFAULT; | |
672 | ||
f64ca217 | 673 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
674 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
675 | return -EFAULT; | |
676 | ||
f64ca217 | 677 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
678 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
679 | return -EFAULT; | |
680 | ||
f64ca217 | 681 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
682 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
683 | return -EFAULT; | |
684 | ||
f64ca217 | 685 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
b0c632db HC |
686 | &vcpu->arch.guest_acrs, 64, prefix)) |
687 | return -EFAULT; | |
688 | ||
689 | if (__guestcopy(vcpu, | |
f64ca217 | 690 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
691 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
692 | return -EFAULT; | |
693 | return 0; | |
694 | } | |
695 | ||
b0c632db HC |
696 | long kvm_arch_vcpu_ioctl(struct file *filp, |
697 | unsigned int ioctl, unsigned long arg) | |
698 | { | |
699 | struct kvm_vcpu *vcpu = filp->private_data; | |
700 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 701 | long r; |
b0c632db | 702 | |
93736624 AK |
703 | switch (ioctl) { |
704 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
705 | struct kvm_s390_interrupt s390int; |
706 | ||
93736624 | 707 | r = -EFAULT; |
ba5c1e9b | 708 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
709 | break; |
710 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
711 | break; | |
ba5c1e9b | 712 | } |
b0c632db | 713 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
714 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
715 | break; | |
b0c632db HC |
716 | case KVM_S390_SET_INITIAL_PSW: { |
717 | psw_t psw; | |
718 | ||
bc923cc9 | 719 | r = -EFAULT; |
b0c632db | 720 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
721 | break; |
722 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
723 | break; | |
b0c632db HC |
724 | } |
725 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
726 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
727 | break; | |
27e0393f CO |
728 | #ifdef CONFIG_KVM_S390_UCONTROL |
729 | case KVM_S390_UCAS_MAP: { | |
730 | struct kvm_s390_ucas_mapping ucasmap; | |
731 | ||
732 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
733 | r = -EFAULT; | |
734 | break; | |
735 | } | |
736 | ||
737 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
738 | r = -EINVAL; | |
739 | break; | |
740 | } | |
741 | ||
742 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
743 | ucasmap.vcpu_addr, ucasmap.length); | |
744 | break; | |
745 | } | |
746 | case KVM_S390_UCAS_UNMAP: { | |
747 | struct kvm_s390_ucas_mapping ucasmap; | |
748 | ||
749 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
750 | r = -EFAULT; | |
751 | break; | |
752 | } | |
753 | ||
754 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
755 | r = -EINVAL; | |
756 | break; | |
757 | } | |
758 | ||
759 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
760 | ucasmap.length); | |
761 | break; | |
762 | } | |
763 | #endif | |
b0c632db | 764 | default: |
bc923cc9 | 765 | r = -EINVAL; |
b0c632db | 766 | } |
bc923cc9 | 767 | return r; |
b0c632db HC |
768 | } |
769 | ||
5b1c1493 CO |
770 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
771 | { | |
772 | #ifdef CONFIG_KVM_S390_UCONTROL | |
773 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
774 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
775 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
776 | get_page(vmf->page); | |
777 | return 0; | |
778 | } | |
779 | #endif | |
780 | return VM_FAULT_SIGBUS; | |
781 | } | |
782 | ||
b0c632db | 783 | /* Section: memory related */ |
f7784b8e MT |
784 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
785 | struct kvm_memory_slot *memslot, | |
786 | struct kvm_memory_slot old, | |
787 | struct kvm_userspace_memory_region *mem, | |
788 | int user_alloc) | |
b0c632db HC |
789 | { |
790 | /* A few sanity checks. We can have exactly one memory slot which has | |
791 | to start at guest virtual zero and which has to be located at a | |
792 | page boundary in userland and which has to end at a page boundary. | |
793 | The memory in userland is ok to be fragmented into various different | |
794 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
795 | doing this call at any time */ | |
796 | ||
628eb9b8 | 797 | if (mem->slot) |
b0c632db HC |
798 | return -EINVAL; |
799 | ||
800 | if (mem->guest_phys_addr) | |
801 | return -EINVAL; | |
802 | ||
598841ca | 803 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
804 | return -EINVAL; |
805 | ||
598841ca | 806 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
807 | return -EINVAL; |
808 | ||
2668dab7 CO |
809 | if (!user_alloc) |
810 | return -EINVAL; | |
811 | ||
f7784b8e MT |
812 | return 0; |
813 | } | |
814 | ||
815 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
816 | struct kvm_userspace_memory_region *mem, | |
817 | struct kvm_memory_slot old, | |
818 | int user_alloc) | |
819 | { | |
f7850c92 | 820 | int rc; |
f7784b8e | 821 | |
598841ca CO |
822 | |
823 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
824 | mem->guest_phys_addr, mem->memory_size); | |
825 | if (rc) | |
f7850c92 | 826 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 827 | return; |
b0c632db HC |
828 | } |
829 | ||
34d4cb8f MT |
830 | void kvm_arch_flush_shadow(struct kvm *kvm) |
831 | { | |
832 | } | |
833 | ||
b0c632db HC |
834 | static int __init kvm_s390_init(void) |
835 | { | |
ef50f7ac | 836 | int ret; |
0ee75bea | 837 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
838 | if (ret) |
839 | return ret; | |
840 | ||
841 | /* | |
842 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 843 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
844 | * only set facilities that are known to work in KVM. |
845 | */ | |
c2f0e8c8 | 846 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
847 | if (!facilities) { |
848 | kvm_exit(); | |
849 | return -ENOMEM; | |
850 | } | |
14375bc4 | 851 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
6d00d00b | 852 | facilities[0] &= 0xff00fff3f47c0000ULL; |
9950f8be | 853 | facilities[1] &= 0x201c000000000000ULL; |
ef50f7ac | 854 | return 0; |
b0c632db HC |
855 | } |
856 | ||
857 | static void __exit kvm_s390_exit(void) | |
858 | { | |
ef50f7ac | 859 | free_page((unsigned long) facilities); |
b0c632db HC |
860 | kvm_exit(); |
861 | } | |
862 | ||
863 | module_init(kvm_s390_init); | |
864 | module_exit(kvm_s390_exit); |