]>
Commit | Line | Data |
---|---|---|
b0c632db | 1 | /* |
a53c8fab | 2 | * hosting zSeries kernel virtual machines |
b0c632db | 3 | * |
a53c8fab | 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> |
a0616cde | 30 | #include <asm/switch_to.h> |
1526bf9c | 31 | #include <asm/sclp.h> |
8f2abe6a | 32 | #include "kvm-s390.h" |
b0c632db HC |
33 | #include "gaccess.h" |
34 | ||
5786fffa CH |
35 | #define CREATE_TRACE_POINTS |
36 | #include "trace.h" | |
ade38c31 | 37 | #include "trace-s390.h" |
5786fffa | 38 | |
b0c632db HC |
39 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
40 | ||
41 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
42 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 43 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
44 | { "exit_validity", VCPU_STAT(exit_validity) }, |
45 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
46 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
47 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
48 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
49 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
50 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f5e10b09 | 51 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b CO |
52 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
53 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, | |
7697e71f | 54 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
55 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
56 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
57 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
58 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
59 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
60 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
61 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 62 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
63 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
64 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
65 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
66 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
67 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
68 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
69 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
70 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
71 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 72 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 73 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 74 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 75 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
76 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
77 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
78 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
79 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
80 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 81 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 82 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 83 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
84 | { NULL } |
85 | }; | |
86 | ||
ef50f7ac | 87 | static unsigned long long *facilities; |
2c70fe44 | 88 | static struct gmap_notifier gmap_notifier; |
b0c632db HC |
89 | |
90 | /* Section: not file related */ | |
10474ae8 | 91 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
92 | { |
93 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 94 | return 0; |
b0c632db HC |
95 | } |
96 | ||
97 | void kvm_arch_hardware_disable(void *garbage) | |
98 | { | |
99 | } | |
100 | ||
2c70fe44 CB |
101 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
102 | ||
b0c632db HC |
103 | int kvm_arch_hardware_setup(void) |
104 | { | |
2c70fe44 CB |
105 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
106 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
107 | return 0; |
108 | } | |
109 | ||
110 | void kvm_arch_hardware_unsetup(void) | |
111 | { | |
2c70fe44 | 112 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
113 | } |
114 | ||
115 | void kvm_arch_check_processor_compat(void *rtn) | |
116 | { | |
117 | } | |
118 | ||
119 | int kvm_arch_init(void *opaque) | |
120 | { | |
121 | return 0; | |
122 | } | |
123 | ||
124 | void kvm_arch_exit(void) | |
125 | { | |
126 | } | |
127 | ||
128 | /* Section: device related */ | |
129 | long kvm_arch_dev_ioctl(struct file *filp, | |
130 | unsigned int ioctl, unsigned long arg) | |
131 | { | |
132 | if (ioctl == KVM_S390_ENABLE_SIE) | |
133 | return s390_enable_sie(); | |
134 | return -EINVAL; | |
135 | } | |
136 | ||
137 | int kvm_dev_ioctl_check_extension(long ext) | |
138 | { | |
d7b0b5eb CO |
139 | int r; |
140 | ||
2bd0ac4e | 141 | switch (ext) { |
d7b0b5eb | 142 | case KVM_CAP_S390_PSW: |
b6cf8788 | 143 | case KVM_CAP_S390_GMAP: |
52e16b18 | 144 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
145 | #ifdef CONFIG_KVM_S390_UCONTROL |
146 | case KVM_CAP_S390_UCONTROL: | |
147 | #endif | |
60b413c9 | 148 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 149 | case KVM_CAP_ONE_REG: |
d6712df9 | 150 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 151 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 152 | case KVM_CAP_IOEVENTFD: |
d7b0b5eb CO |
153 | r = 1; |
154 | break; | |
e726b1bd CB |
155 | case KVM_CAP_NR_VCPUS: |
156 | case KVM_CAP_MAX_VCPUS: | |
157 | r = KVM_MAX_VCPUS; | |
158 | break; | |
e1e2e605 NW |
159 | case KVM_CAP_NR_MEMSLOTS: |
160 | r = KVM_USER_MEM_SLOTS; | |
161 | break; | |
1526bf9c | 162 | case KVM_CAP_S390_COW: |
abf09bed | 163 | r = MACHINE_HAS_ESOP; |
1526bf9c | 164 | break; |
2bd0ac4e | 165 | default: |
d7b0b5eb | 166 | r = 0; |
2bd0ac4e | 167 | } |
d7b0b5eb | 168 | return r; |
b0c632db HC |
169 | } |
170 | ||
171 | /* Section: vm related */ | |
172 | /* | |
173 | * Get (and clear) the dirty memory log for a memory slot. | |
174 | */ | |
175 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
176 | struct kvm_dirty_log *log) | |
177 | { | |
178 | return 0; | |
179 | } | |
180 | ||
181 | long kvm_arch_vm_ioctl(struct file *filp, | |
182 | unsigned int ioctl, unsigned long arg) | |
183 | { | |
184 | struct kvm *kvm = filp->private_data; | |
185 | void __user *argp = (void __user *)arg; | |
186 | int r; | |
187 | ||
188 | switch (ioctl) { | |
ba5c1e9b CO |
189 | case KVM_S390_INTERRUPT: { |
190 | struct kvm_s390_interrupt s390int; | |
191 | ||
192 | r = -EFAULT; | |
193 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
194 | break; | |
195 | r = kvm_s390_inject_vm(kvm, &s390int); | |
196 | break; | |
197 | } | |
b0c632db | 198 | default: |
367e1319 | 199 | r = -ENOTTY; |
b0c632db HC |
200 | } |
201 | ||
202 | return r; | |
203 | } | |
204 | ||
e08b9637 | 205 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 206 | { |
b0c632db HC |
207 | int rc; |
208 | char debug_name[16]; | |
209 | ||
e08b9637 CO |
210 | rc = -EINVAL; |
211 | #ifdef CONFIG_KVM_S390_UCONTROL | |
212 | if (type & ~KVM_VM_S390_UCONTROL) | |
213 | goto out_err; | |
214 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
215 | goto out_err; | |
216 | #else | |
217 | if (type) | |
218 | goto out_err; | |
219 | #endif | |
220 | ||
b0c632db HC |
221 | rc = s390_enable_sie(); |
222 | if (rc) | |
d89f5eff | 223 | goto out_err; |
b0c632db | 224 | |
b290411a CO |
225 | rc = -ENOMEM; |
226 | ||
b0c632db HC |
227 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
228 | if (!kvm->arch.sca) | |
d89f5eff | 229 | goto out_err; |
b0c632db HC |
230 | |
231 | sprintf(debug_name, "kvm-%u", current->pid); | |
232 | ||
233 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
234 | if (!kvm->arch.dbf) | |
235 | goto out_nodbf; | |
236 | ||
ba5c1e9b CO |
237 | spin_lock_init(&kvm->arch.float_int.lock); |
238 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
239 | ||
b0c632db HC |
240 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
241 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
242 | ||
e08b9637 CO |
243 | if (type & KVM_VM_S390_UCONTROL) { |
244 | kvm->arch.gmap = NULL; | |
245 | } else { | |
246 | kvm->arch.gmap = gmap_alloc(current->mm); | |
247 | if (!kvm->arch.gmap) | |
248 | goto out_nogmap; | |
2c70fe44 | 249 | kvm->arch.gmap->private = kvm; |
e08b9637 | 250 | } |
fa6b7fe9 CH |
251 | |
252 | kvm->arch.css_support = 0; | |
253 | ||
d89f5eff | 254 | return 0; |
598841ca CO |
255 | out_nogmap: |
256 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
257 | out_nodbf: |
258 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
259 | out_err: |
260 | return rc; | |
b0c632db HC |
261 | } |
262 | ||
d329c035 CB |
263 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
264 | { | |
265 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 266 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
58f9460b CO |
267 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
268 | clear_bit(63 - vcpu->vcpu_id, | |
269 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
270 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
271 | (__u64) vcpu->arch.sie_block) | |
272 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
273 | } | |
abf4a71e | 274 | smp_mb(); |
27e0393f CO |
275 | |
276 | if (kvm_is_ucontrol(vcpu->kvm)) | |
277 | gmap_free(vcpu->arch.gmap); | |
278 | ||
d329c035 | 279 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 280 | kvm_vcpu_uninit(vcpu); |
b110feaf | 281 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
282 | } |
283 | ||
284 | static void kvm_free_vcpus(struct kvm *kvm) | |
285 | { | |
286 | unsigned int i; | |
988a2cae | 287 | struct kvm_vcpu *vcpu; |
d329c035 | 288 | |
988a2cae GN |
289 | kvm_for_each_vcpu(i, vcpu, kvm) |
290 | kvm_arch_vcpu_destroy(vcpu); | |
291 | ||
292 | mutex_lock(&kvm->lock); | |
293 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
294 | kvm->vcpus[i] = NULL; | |
295 | ||
296 | atomic_set(&kvm->online_vcpus, 0); | |
297 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
298 | } |
299 | ||
ad8ba2cd SY |
300 | void kvm_arch_sync_events(struct kvm *kvm) |
301 | { | |
302 | } | |
303 | ||
b0c632db HC |
304 | void kvm_arch_destroy_vm(struct kvm *kvm) |
305 | { | |
d329c035 | 306 | kvm_free_vcpus(kvm); |
b0c632db | 307 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 308 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
309 | if (!kvm_is_ucontrol(kvm)) |
310 | gmap_free(kvm->arch.gmap); | |
b0c632db HC |
311 | } |
312 | ||
313 | /* Section: vcpu related */ | |
314 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
315 | { | |
27e0393f CO |
316 | if (kvm_is_ucontrol(vcpu->kvm)) { |
317 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
318 | if (!vcpu->arch.gmap) | |
319 | return -ENOMEM; | |
2c70fe44 | 320 | vcpu->arch.gmap->private = vcpu->kvm; |
27e0393f CO |
321 | return 0; |
322 | } | |
323 | ||
598841ca | 324 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
325 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
326 | KVM_SYNC_GPRS | | |
9eed0735 CB |
327 | KVM_SYNC_ACRS | |
328 | KVM_SYNC_CRS; | |
b0c632db HC |
329 | return 0; |
330 | } | |
331 | ||
332 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
333 | { | |
6692cef3 | 334 | /* Nothing todo */ |
b0c632db HC |
335 | } |
336 | ||
337 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
338 | { | |
339 | save_fp_regs(&vcpu->arch.host_fpregs); | |
340 | save_access_regs(vcpu->arch.host_acrs); | |
341 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
342 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
59674c1a | 343 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 344 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 345 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
346 | } |
347 | ||
348 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
349 | { | |
9e6dabef | 350 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 351 | gmap_disable(vcpu->arch.gmap); |
b0c632db | 352 | save_fp_regs(&vcpu->arch.guest_fpregs); |
59674c1a | 353 | save_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
354 | restore_fp_regs(&vcpu->arch.host_fpregs); |
355 | restore_access_regs(vcpu->arch.host_acrs); | |
356 | } | |
357 | ||
358 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
359 | { | |
360 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
361 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
362 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 363 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
364 | vcpu->arch.sie_block->cputm = 0UL; |
365 | vcpu->arch.sie_block->ckc = 0UL; | |
366 | vcpu->arch.sie_block->todpr = 0; | |
367 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
368 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
369 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
370 | vcpu->arch.guest_fpregs.fpc = 0; | |
371 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
372 | vcpu->arch.sie_block->gbea = 1; | |
61bde82c | 373 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
374 | } |
375 | ||
42897d86 MT |
376 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
377 | { | |
378 | return 0; | |
379 | } | |
380 | ||
b0c632db HC |
381 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
382 | { | |
9e6dabef CH |
383 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
384 | CPUSTAT_SM | | |
69d0d3a3 CB |
385 | CPUSTAT_STOPPED | |
386 | CPUSTAT_GED); | |
fc34531d | 387 | vcpu->arch.sie_block->ecb = 6; |
69d0d3a3 | 388 | vcpu->arch.sie_block->ecb2 = 8; |
b0c632db | 389 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 390 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
391 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
392 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
393 | (unsigned long) vcpu); | |
394 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 395 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 396 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
397 | return 0; |
398 | } | |
399 | ||
400 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
401 | unsigned int id) | |
402 | { | |
4d47555a CO |
403 | struct kvm_vcpu *vcpu; |
404 | int rc = -EINVAL; | |
405 | ||
406 | if (id >= KVM_MAX_VCPUS) | |
407 | goto out; | |
408 | ||
409 | rc = -ENOMEM; | |
b0c632db | 410 | |
b110feaf | 411 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 412 | if (!vcpu) |
4d47555a | 413 | goto out; |
b0c632db | 414 | |
180c12fb CB |
415 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
416 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
417 | |
418 | if (!vcpu->arch.sie_block) | |
419 | goto out_free_cpu; | |
420 | ||
421 | vcpu->arch.sie_block->icpua = id; | |
58f9460b CO |
422 | if (!kvm_is_ucontrol(kvm)) { |
423 | if (!kvm->arch.sca) { | |
424 | WARN_ON_ONCE(1); | |
425 | goto out_free_cpu; | |
426 | } | |
427 | if (!kvm->arch.sca->cpu[id].sda) | |
428 | kvm->arch.sca->cpu[id].sda = | |
429 | (__u64) vcpu->arch.sie_block; | |
430 | vcpu->arch.sie_block->scaoh = | |
431 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
432 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
433 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
434 | } | |
b0c632db | 435 | |
ba5c1e9b CO |
436 | spin_lock_init(&vcpu->arch.local_int.lock); |
437 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
438 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 439 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b | 440 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
d0321a24 | 441 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 442 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 443 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 444 | |
b0c632db HC |
445 | rc = kvm_vcpu_init(vcpu, kvm, id); |
446 | if (rc) | |
7b06bf2f | 447 | goto out_free_sie_block; |
b0c632db HC |
448 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
449 | vcpu->arch.sie_block); | |
ade38c31 | 450 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 451 | |
b0c632db | 452 | return vcpu; |
7b06bf2f WY |
453 | out_free_sie_block: |
454 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 455 | out_free_cpu: |
b110feaf | 456 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 457 | out: |
b0c632db HC |
458 | return ERR_PTR(rc); |
459 | } | |
460 | ||
b0c632db HC |
461 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
462 | { | |
463 | /* kvm common code refers to this, but never calls it */ | |
464 | BUG(); | |
465 | return 0; | |
466 | } | |
467 | ||
49b99e1e CB |
468 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
469 | { | |
470 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
471 | } | |
472 | ||
473 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
474 | { | |
475 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
476 | } | |
477 | ||
478 | /* | |
479 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
480 | * If the CPU is not running (e.g. waiting as idle) the function will | |
481 | * return immediately. */ | |
482 | void exit_sie(struct kvm_vcpu *vcpu) | |
483 | { | |
484 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
485 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
486 | cpu_relax(); | |
487 | } | |
488 | ||
489 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
490 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
491 | { | |
492 | s390_vcpu_block(vcpu); | |
493 | exit_sie(vcpu); | |
494 | } | |
495 | ||
2c70fe44 CB |
496 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
497 | { | |
498 | int i; | |
499 | struct kvm *kvm = gmap->private; | |
500 | struct kvm_vcpu *vcpu; | |
501 | ||
502 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
503 | /* match against both prefix pages */ | |
504 | if (vcpu->arch.sie_block->prefix == (address & ~0x1000UL)) { | |
505 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); | |
506 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
507 | exit_sie_sync(vcpu); | |
508 | } | |
509 | } | |
510 | } | |
511 | ||
b6d33834 CD |
512 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
513 | { | |
514 | /* kvm common code refers to this, but never calls it */ | |
515 | BUG(); | |
516 | return 0; | |
517 | } | |
518 | ||
14eebd91 CO |
519 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
520 | struct kvm_one_reg *reg) | |
521 | { | |
522 | int r = -EINVAL; | |
523 | ||
524 | switch (reg->id) { | |
29b7c71b CO |
525 | case KVM_REG_S390_TODPR: |
526 | r = put_user(vcpu->arch.sie_block->todpr, | |
527 | (u32 __user *)reg->addr); | |
528 | break; | |
529 | case KVM_REG_S390_EPOCHDIFF: | |
530 | r = put_user(vcpu->arch.sie_block->epoch, | |
531 | (u64 __user *)reg->addr); | |
532 | break; | |
46a6dd1c J |
533 | case KVM_REG_S390_CPU_TIMER: |
534 | r = put_user(vcpu->arch.sie_block->cputm, | |
535 | (u64 __user *)reg->addr); | |
536 | break; | |
537 | case KVM_REG_S390_CLOCK_COMP: | |
538 | r = put_user(vcpu->arch.sie_block->ckc, | |
539 | (u64 __user *)reg->addr); | |
540 | break; | |
14eebd91 CO |
541 | default: |
542 | break; | |
543 | } | |
544 | ||
545 | return r; | |
546 | } | |
547 | ||
548 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
549 | struct kvm_one_reg *reg) | |
550 | { | |
551 | int r = -EINVAL; | |
552 | ||
553 | switch (reg->id) { | |
29b7c71b CO |
554 | case KVM_REG_S390_TODPR: |
555 | r = get_user(vcpu->arch.sie_block->todpr, | |
556 | (u32 __user *)reg->addr); | |
557 | break; | |
558 | case KVM_REG_S390_EPOCHDIFF: | |
559 | r = get_user(vcpu->arch.sie_block->epoch, | |
560 | (u64 __user *)reg->addr); | |
561 | break; | |
46a6dd1c J |
562 | case KVM_REG_S390_CPU_TIMER: |
563 | r = get_user(vcpu->arch.sie_block->cputm, | |
564 | (u64 __user *)reg->addr); | |
565 | break; | |
566 | case KVM_REG_S390_CLOCK_COMP: | |
567 | r = get_user(vcpu->arch.sie_block->ckc, | |
568 | (u64 __user *)reg->addr); | |
569 | break; | |
14eebd91 CO |
570 | default: |
571 | break; | |
572 | } | |
573 | ||
574 | return r; | |
575 | } | |
b6d33834 | 576 | |
b0c632db HC |
577 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
578 | { | |
b0c632db | 579 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
580 | return 0; |
581 | } | |
582 | ||
583 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
584 | { | |
5a32c1af | 585 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
586 | return 0; |
587 | } | |
588 | ||
589 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
590 | { | |
5a32c1af | 591 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
592 | return 0; |
593 | } | |
594 | ||
595 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
596 | struct kvm_sregs *sregs) | |
597 | { | |
59674c1a | 598 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 599 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 600 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
601 | return 0; |
602 | } | |
603 | ||
604 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
605 | struct kvm_sregs *sregs) | |
606 | { | |
59674c1a | 607 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 608 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
609 | return 0; |
610 | } | |
611 | ||
612 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
613 | { | |
b0c632db | 614 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
85175587 | 615 | vcpu->arch.guest_fpregs.fpc = fpu->fpc & FPC_VALID_MASK; |
7eef87dc | 616 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
b0c632db HC |
617 | return 0; |
618 | } | |
619 | ||
620 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
621 | { | |
b0c632db HC |
622 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
623 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
624 | return 0; |
625 | } | |
626 | ||
627 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
628 | { | |
629 | int rc = 0; | |
630 | ||
9e6dabef | 631 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 632 | rc = -EBUSY; |
d7b0b5eb CO |
633 | else { |
634 | vcpu->run->psw_mask = psw.mask; | |
635 | vcpu->run->psw_addr = psw.addr; | |
636 | } | |
b0c632db HC |
637 | return rc; |
638 | } | |
639 | ||
640 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
641 | struct kvm_translation *tr) | |
642 | { | |
643 | return -EINVAL; /* not implemented yet */ | |
644 | } | |
645 | ||
d0bfb940 JK |
646 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
647 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
648 | { |
649 | return -EINVAL; /* not implemented yet */ | |
650 | } | |
651 | ||
62d9f0db MT |
652 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
653 | struct kvm_mp_state *mp_state) | |
654 | { | |
655 | return -EINVAL; /* not implemented yet */ | |
656 | } | |
657 | ||
658 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
659 | struct kvm_mp_state *mp_state) | |
660 | { | |
661 | return -EINVAL; /* not implemented yet */ | |
662 | } | |
663 | ||
2c70fe44 CB |
664 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
665 | { | |
666 | /* | |
667 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
668 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
669 | * This ensures that the ipte instruction for this request has | |
670 | * already finished. We might race against a second unmapper that | |
671 | * wants to set the blocking bit. Lets just retry the request loop. | |
672 | */ | |
673 | while (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { | |
674 | int rc; | |
675 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
676 | vcpu->arch.sie_block->prefix, | |
677 | PAGE_SIZE * 2); | |
678 | if (rc) | |
679 | return rc; | |
680 | s390_vcpu_unblock(vcpu); | |
681 | } | |
682 | return 0; | |
683 | } | |
684 | ||
e168bf8d | 685 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
b0c632db | 686 | { |
e168bf8d CO |
687 | int rc; |
688 | ||
5a32c1af | 689 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
690 | |
691 | if (need_resched()) | |
692 | schedule(); | |
693 | ||
71cde587 CB |
694 | if (test_thread_flag(TIF_MCCK_PENDING)) |
695 | s390_handle_mcck(); | |
696 | ||
d6b6d166 CO |
697 | if (!kvm_is_ucontrol(vcpu->kvm)) |
698 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 699 | |
2c70fe44 CB |
700 | rc = kvm_s390_handle_requests(vcpu); |
701 | if (rc) | |
702 | return rc; | |
703 | ||
b0c632db | 704 | vcpu->arch.sie_block->icptcode = 0; |
83987ace | 705 | preempt_disable(); |
b0c632db | 706 | kvm_guest_enter(); |
83987ace | 707 | preempt_enable(); |
b0c632db HC |
708 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", |
709 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
5786fffa CH |
710 | trace_kvm_s390_sie_enter(vcpu, |
711 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
5a32c1af | 712 | rc = sie64a(vcpu->arch.sie_block, vcpu->run->s.regs.gprs); |
7c470539 MS |
713 | if (rc > 0) |
714 | rc = 0; | |
715 | if (rc < 0) { | |
e168bf8d CO |
716 | if (kvm_is_ucontrol(vcpu->kvm)) { |
717 | rc = SIE_INTERCEPT_UCONTROL; | |
718 | } else { | |
719 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
5786fffa | 720 | trace_kvm_s390_sie_fault(vcpu); |
db4a29cb | 721 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
e168bf8d | 722 | } |
1f0d0f09 | 723 | } |
b0c632db HC |
724 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
725 | vcpu->arch.sie_block->icptcode); | |
5786fffa | 726 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); |
b0c632db | 727 | kvm_guest_exit(); |
b0c632db | 728 | |
5a32c1af | 729 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
e168bf8d | 730 | return rc; |
b0c632db HC |
731 | } |
732 | ||
733 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
734 | { | |
8f2abe6a | 735 | int rc; |
b0c632db HC |
736 | sigset_t sigsaved; |
737 | ||
9ace903d | 738 | rerun_vcpu: |
b0c632db HC |
739 | if (vcpu->sigset_active) |
740 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
741 | ||
9e6dabef | 742 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 743 | |
ba5c1e9b CO |
744 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
745 | ||
8f2abe6a CB |
746 | switch (kvm_run->exit_reason) { |
747 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 748 | case KVM_EXIT_UNKNOWN: |
9ace903d | 749 | case KVM_EXIT_INTR: |
8f2abe6a | 750 | case KVM_EXIT_S390_RESET: |
e168bf8d | 751 | case KVM_EXIT_S390_UCONTROL: |
fa6b7fe9 | 752 | case KVM_EXIT_S390_TSCH: |
8f2abe6a CB |
753 | break; |
754 | default: | |
755 | BUG(); | |
756 | } | |
757 | ||
d7b0b5eb CO |
758 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
759 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
60b413c9 CB |
760 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
761 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; | |
762 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
763 | } | |
9eed0735 CB |
764 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
765 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; | |
766 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
767 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
768 | } | |
d7b0b5eb | 769 | |
dab4079d | 770 | might_fault(); |
8f2abe6a CB |
771 | |
772 | do { | |
e168bf8d CO |
773 | rc = __vcpu_run(vcpu); |
774 | if (rc) | |
775 | break; | |
c0d744a9 CO |
776 | if (kvm_is_ucontrol(vcpu->kvm)) |
777 | rc = -EOPNOTSUPP; | |
778 | else | |
779 | rc = kvm_handle_sie_intercept(vcpu); | |
8f2abe6a CB |
780 | } while (!signal_pending(current) && !rc); |
781 | ||
9ace903d CE |
782 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
783 | goto rerun_vcpu; | |
784 | ||
b1d16c49 CE |
785 | if (signal_pending(current) && !rc) { |
786 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 787 | rc = -EINTR; |
b1d16c49 | 788 | } |
8f2abe6a | 789 | |
e168bf8d CO |
790 | #ifdef CONFIG_KVM_S390_UCONTROL |
791 | if (rc == SIE_INTERCEPT_UCONTROL) { | |
792 | kvm_run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
793 | kvm_run->s390_ucontrol.trans_exc_code = | |
794 | current->thread.gmap_addr; | |
795 | kvm_run->s390_ucontrol.pgm_code = 0x10; | |
796 | rc = 0; | |
797 | } | |
798 | #endif | |
799 | ||
b8e660b8 | 800 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
801 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
802 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
803 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
804 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
805 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
806 | rc = 0; | |
807 | } | |
808 | ||
809 | if (rc == -EREMOTE) { | |
810 | /* intercept was handled, but userspace support is needed | |
811 | * kvm_run has been prepared by the handler */ | |
812 | rc = 0; | |
813 | } | |
b0c632db | 814 | |
d7b0b5eb CO |
815 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
816 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
60b413c9 | 817 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
9eed0735 | 818 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
d7b0b5eb | 819 | |
b0c632db HC |
820 | if (vcpu->sigset_active) |
821 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
822 | ||
b0c632db | 823 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 824 | return rc; |
b0c632db HC |
825 | } |
826 | ||
092670cd | 827 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
828 | unsigned long n, int prefix) |
829 | { | |
830 | if (prefix) | |
831 | return copy_to_guest(vcpu, guestdest, from, n); | |
832 | else | |
833 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
834 | } | |
835 | ||
836 | /* | |
837 | * store status at address | |
838 | * we use have two special cases: | |
839 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
840 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
841 | */ | |
971eb77f | 842 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 843 | { |
092670cd | 844 | unsigned char archmode = 1; |
b0c632db HC |
845 | int prefix; |
846 | ||
847 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
848 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
849 | return -EFAULT; | |
850 | addr = SAVE_AREA_BASE; | |
851 | prefix = 0; | |
852 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
853 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
854 | return -EFAULT; | |
855 | addr = SAVE_AREA_BASE; | |
856 | prefix = 1; | |
857 | } else | |
858 | prefix = 0; | |
859 | ||
15bc8d84 CB |
860 | /* |
861 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
862 | * copying in vcpu load/put. Lets update our copies before we save | |
863 | * it into the save area | |
864 | */ | |
865 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
866 | save_access_regs(vcpu->run->s.regs.acrs); | |
867 | ||
f64ca217 | 868 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
869 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
870 | return -EFAULT; | |
871 | ||
f64ca217 | 872 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
5a32c1af | 873 | vcpu->run->s.regs.gprs, 128, prefix)) |
b0c632db HC |
874 | return -EFAULT; |
875 | ||
f64ca217 | 876 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
877 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
878 | return -EFAULT; | |
879 | ||
f64ca217 | 880 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
881 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
882 | return -EFAULT; | |
883 | ||
884 | if (__guestcopy(vcpu, | |
f64ca217 | 885 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
886 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
887 | return -EFAULT; | |
888 | ||
f64ca217 | 889 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
890 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
891 | return -EFAULT; | |
892 | ||
f64ca217 | 893 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
894 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
895 | return -EFAULT; | |
896 | ||
f64ca217 | 897 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
898 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
899 | return -EFAULT; | |
900 | ||
f64ca217 | 901 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
59674c1a | 902 | &vcpu->run->s.regs.acrs, 64, prefix)) |
b0c632db HC |
903 | return -EFAULT; |
904 | ||
905 | if (__guestcopy(vcpu, | |
f64ca217 | 906 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
907 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
908 | return -EFAULT; | |
909 | return 0; | |
910 | } | |
911 | ||
d6712df9 CH |
912 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
913 | struct kvm_enable_cap *cap) | |
914 | { | |
915 | int r; | |
916 | ||
917 | if (cap->flags) | |
918 | return -EINVAL; | |
919 | ||
920 | switch (cap->cap) { | |
fa6b7fe9 CH |
921 | case KVM_CAP_S390_CSS_SUPPORT: |
922 | if (!vcpu->kvm->arch.css_support) { | |
923 | vcpu->kvm->arch.css_support = 1; | |
924 | trace_kvm_s390_enable_css(vcpu->kvm); | |
925 | } | |
926 | r = 0; | |
927 | break; | |
d6712df9 CH |
928 | default: |
929 | r = -EINVAL; | |
930 | break; | |
931 | } | |
932 | return r; | |
933 | } | |
934 | ||
b0c632db HC |
935 | long kvm_arch_vcpu_ioctl(struct file *filp, |
936 | unsigned int ioctl, unsigned long arg) | |
937 | { | |
938 | struct kvm_vcpu *vcpu = filp->private_data; | |
939 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 940 | long r; |
b0c632db | 941 | |
93736624 AK |
942 | switch (ioctl) { |
943 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
944 | struct kvm_s390_interrupt s390int; |
945 | ||
93736624 | 946 | r = -EFAULT; |
ba5c1e9b | 947 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
948 | break; |
949 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
950 | break; | |
ba5c1e9b | 951 | } |
b0c632db | 952 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
953 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
954 | break; | |
b0c632db HC |
955 | case KVM_S390_SET_INITIAL_PSW: { |
956 | psw_t psw; | |
957 | ||
bc923cc9 | 958 | r = -EFAULT; |
b0c632db | 959 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
960 | break; |
961 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
962 | break; | |
b0c632db HC |
963 | } |
964 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
965 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
966 | break; | |
14eebd91 CO |
967 | case KVM_SET_ONE_REG: |
968 | case KVM_GET_ONE_REG: { | |
969 | struct kvm_one_reg reg; | |
970 | r = -EFAULT; | |
971 | if (copy_from_user(®, argp, sizeof(reg))) | |
972 | break; | |
973 | if (ioctl == KVM_SET_ONE_REG) | |
974 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
975 | else | |
976 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
977 | break; | |
978 | } | |
27e0393f CO |
979 | #ifdef CONFIG_KVM_S390_UCONTROL |
980 | case KVM_S390_UCAS_MAP: { | |
981 | struct kvm_s390_ucas_mapping ucasmap; | |
982 | ||
983 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
984 | r = -EFAULT; | |
985 | break; | |
986 | } | |
987 | ||
988 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
989 | r = -EINVAL; | |
990 | break; | |
991 | } | |
992 | ||
993 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
994 | ucasmap.vcpu_addr, ucasmap.length); | |
995 | break; | |
996 | } | |
997 | case KVM_S390_UCAS_UNMAP: { | |
998 | struct kvm_s390_ucas_mapping ucasmap; | |
999 | ||
1000 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1001 | r = -EFAULT; | |
1002 | break; | |
1003 | } | |
1004 | ||
1005 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1006 | r = -EINVAL; | |
1007 | break; | |
1008 | } | |
1009 | ||
1010 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
1011 | ucasmap.length); | |
1012 | break; | |
1013 | } | |
1014 | #endif | |
ccc7910f CO |
1015 | case KVM_S390_VCPU_FAULT: { |
1016 | r = gmap_fault(arg, vcpu->arch.gmap); | |
1017 | if (!IS_ERR_VALUE(r)) | |
1018 | r = 0; | |
1019 | break; | |
1020 | } | |
d6712df9 CH |
1021 | case KVM_ENABLE_CAP: |
1022 | { | |
1023 | struct kvm_enable_cap cap; | |
1024 | r = -EFAULT; | |
1025 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1026 | break; | |
1027 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
1028 | break; | |
1029 | } | |
b0c632db | 1030 | default: |
3e6afcf1 | 1031 | r = -ENOTTY; |
b0c632db | 1032 | } |
bc923cc9 | 1033 | return r; |
b0c632db HC |
1034 | } |
1035 | ||
5b1c1493 CO |
1036 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
1037 | { | |
1038 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1039 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
1040 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
1041 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
1042 | get_page(vmf->page); | |
1043 | return 0; | |
1044 | } | |
1045 | #endif | |
1046 | return VM_FAULT_SIGBUS; | |
1047 | } | |
1048 | ||
db3fe4eb TY |
1049 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, |
1050 | struct kvm_memory_slot *dont) | |
1051 | { | |
1052 | } | |
1053 | ||
1054 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) | |
1055 | { | |
1056 | return 0; | |
1057 | } | |
1058 | ||
b0c632db | 1059 | /* Section: memory related */ |
f7784b8e MT |
1060 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
1061 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
1062 | struct kvm_userspace_memory_region *mem, |
1063 | enum kvm_mr_change change) | |
b0c632db | 1064 | { |
dd2887e7 NW |
1065 | /* A few sanity checks. We can have memory slots which have to be |
1066 | located/ended at a segment boundary (1MB). The memory in userland is | |
1067 | ok to be fragmented into various different vmas. It is okay to mmap() | |
1068 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 1069 | |
598841ca | 1070 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
1071 | return -EINVAL; |
1072 | ||
598841ca | 1073 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
1074 | return -EINVAL; |
1075 | ||
f7784b8e MT |
1076 | return 0; |
1077 | } | |
1078 | ||
1079 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
1080 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
1081 | const struct kvm_memory_slot *old, |
1082 | enum kvm_mr_change change) | |
f7784b8e | 1083 | { |
f7850c92 | 1084 | int rc; |
f7784b8e | 1085 | |
2cef4deb CB |
1086 | /* If the basics of the memslot do not change, we do not want |
1087 | * to update the gmap. Every update causes several unnecessary | |
1088 | * segment translation exceptions. This is usually handled just | |
1089 | * fine by the normal fault handler + gmap, but it will also | |
1090 | * cause faults on the prefix page of running guest CPUs. | |
1091 | */ | |
1092 | if (old->userspace_addr == mem->userspace_addr && | |
1093 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
1094 | old->npages * PAGE_SIZE == mem->memory_size) | |
1095 | return; | |
598841ca CO |
1096 | |
1097 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
1098 | mem->guest_phys_addr, mem->memory_size); | |
1099 | if (rc) | |
f7850c92 | 1100 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 1101 | return; |
b0c632db HC |
1102 | } |
1103 | ||
2df72e9b MT |
1104 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
1105 | { | |
1106 | } | |
1107 | ||
1108 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, | |
1109 | struct kvm_memory_slot *slot) | |
34d4cb8f MT |
1110 | { |
1111 | } | |
1112 | ||
b0c632db HC |
1113 | static int __init kvm_s390_init(void) |
1114 | { | |
ef50f7ac | 1115 | int ret; |
0ee75bea | 1116 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
1117 | if (ret) |
1118 | return ret; | |
1119 | ||
1120 | /* | |
1121 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 1122 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
1123 | * only set facilities that are known to work in KVM. |
1124 | */ | |
c2f0e8c8 | 1125 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
1126 | if (!facilities) { |
1127 | kvm_exit(); | |
1128 | return -ENOMEM; | |
1129 | } | |
14375bc4 | 1130 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
69d0d3a3 | 1131 | facilities[0] &= 0xff82fff3f47c0000ULL; |
87cac8f8 | 1132 | facilities[1] &= 0x001c000000000000ULL; |
ef50f7ac | 1133 | return 0; |
b0c632db HC |
1134 | } |
1135 | ||
1136 | static void __exit kvm_s390_exit(void) | |
1137 | { | |
ef50f7ac | 1138 | free_page((unsigned long) facilities); |
b0c632db HC |
1139 | kvm_exit(); |
1140 | } | |
1141 | ||
1142 | module_init(kvm_s390_init); | |
1143 | module_exit(kvm_s390_exit); | |
566af940 CH |
1144 | |
1145 | /* | |
1146 | * Enable autoloading of the kvm module. | |
1147 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
1148 | * since x86 takes a different approach. | |
1149 | */ | |
1150 | #include <linux/miscdevice.h> | |
1151 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
1152 | MODULE_ALIAS("devname:kvm"); |