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) }, | |
453423dc CB |
62 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
63 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
64 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
65 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
66 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
67 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
68 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
69 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
70 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 71 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 72 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 73 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 74 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
75 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
76 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
77 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
78 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
79 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 80 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 81 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 82 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
83 | { NULL } |
84 | }; | |
85 | ||
ef50f7ac | 86 | static unsigned long long *facilities; |
b0c632db HC |
87 | |
88 | /* Section: not file related */ | |
10474ae8 | 89 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
90 | { |
91 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 92 | return 0; |
b0c632db HC |
93 | } |
94 | ||
95 | void kvm_arch_hardware_disable(void *garbage) | |
96 | { | |
97 | } | |
98 | ||
b0c632db HC |
99 | int kvm_arch_hardware_setup(void) |
100 | { | |
101 | return 0; | |
102 | } | |
103 | ||
104 | void kvm_arch_hardware_unsetup(void) | |
105 | { | |
106 | } | |
107 | ||
108 | void kvm_arch_check_processor_compat(void *rtn) | |
109 | { | |
110 | } | |
111 | ||
112 | int kvm_arch_init(void *opaque) | |
113 | { | |
114 | return 0; | |
115 | } | |
116 | ||
117 | void kvm_arch_exit(void) | |
118 | { | |
119 | } | |
120 | ||
121 | /* Section: device related */ | |
122 | long kvm_arch_dev_ioctl(struct file *filp, | |
123 | unsigned int ioctl, unsigned long arg) | |
124 | { | |
125 | if (ioctl == KVM_S390_ENABLE_SIE) | |
126 | return s390_enable_sie(); | |
127 | return -EINVAL; | |
128 | } | |
129 | ||
130 | int kvm_dev_ioctl_check_extension(long ext) | |
131 | { | |
d7b0b5eb CO |
132 | int r; |
133 | ||
2bd0ac4e | 134 | switch (ext) { |
d7b0b5eb | 135 | case KVM_CAP_S390_PSW: |
b6cf8788 | 136 | case KVM_CAP_S390_GMAP: |
52e16b18 | 137 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
138 | #ifdef CONFIG_KVM_S390_UCONTROL |
139 | case KVM_CAP_S390_UCONTROL: | |
140 | #endif | |
60b413c9 | 141 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 142 | case KVM_CAP_ONE_REG: |
d6712df9 | 143 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 144 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 145 | case KVM_CAP_IOEVENTFD: |
d7b0b5eb CO |
146 | r = 1; |
147 | break; | |
e726b1bd CB |
148 | case KVM_CAP_NR_VCPUS: |
149 | case KVM_CAP_MAX_VCPUS: | |
150 | r = KVM_MAX_VCPUS; | |
151 | break; | |
e1e2e605 NW |
152 | case KVM_CAP_NR_MEMSLOTS: |
153 | r = KVM_USER_MEM_SLOTS; | |
154 | break; | |
1526bf9c | 155 | case KVM_CAP_S390_COW: |
abf09bed | 156 | r = MACHINE_HAS_ESOP; |
1526bf9c | 157 | break; |
2bd0ac4e | 158 | default: |
d7b0b5eb | 159 | r = 0; |
2bd0ac4e | 160 | } |
d7b0b5eb | 161 | return r; |
b0c632db HC |
162 | } |
163 | ||
164 | /* Section: vm related */ | |
165 | /* | |
166 | * Get (and clear) the dirty memory log for a memory slot. | |
167 | */ | |
168 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
169 | struct kvm_dirty_log *log) | |
170 | { | |
171 | return 0; | |
172 | } | |
173 | ||
174 | long kvm_arch_vm_ioctl(struct file *filp, | |
175 | unsigned int ioctl, unsigned long arg) | |
176 | { | |
177 | struct kvm *kvm = filp->private_data; | |
178 | void __user *argp = (void __user *)arg; | |
179 | int r; | |
180 | ||
181 | switch (ioctl) { | |
ba5c1e9b CO |
182 | case KVM_S390_INTERRUPT: { |
183 | struct kvm_s390_interrupt s390int; | |
184 | ||
185 | r = -EFAULT; | |
186 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
187 | break; | |
188 | r = kvm_s390_inject_vm(kvm, &s390int); | |
189 | break; | |
190 | } | |
b0c632db | 191 | default: |
367e1319 | 192 | r = -ENOTTY; |
b0c632db HC |
193 | } |
194 | ||
195 | return r; | |
196 | } | |
197 | ||
e08b9637 | 198 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 199 | { |
b0c632db HC |
200 | int rc; |
201 | char debug_name[16]; | |
202 | ||
e08b9637 CO |
203 | rc = -EINVAL; |
204 | #ifdef CONFIG_KVM_S390_UCONTROL | |
205 | if (type & ~KVM_VM_S390_UCONTROL) | |
206 | goto out_err; | |
207 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
208 | goto out_err; | |
209 | #else | |
210 | if (type) | |
211 | goto out_err; | |
212 | #endif | |
213 | ||
b0c632db HC |
214 | rc = s390_enable_sie(); |
215 | if (rc) | |
d89f5eff | 216 | goto out_err; |
b0c632db | 217 | |
b290411a CO |
218 | rc = -ENOMEM; |
219 | ||
b0c632db HC |
220 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
221 | if (!kvm->arch.sca) | |
d89f5eff | 222 | goto out_err; |
b0c632db HC |
223 | |
224 | sprintf(debug_name, "kvm-%u", current->pid); | |
225 | ||
226 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
227 | if (!kvm->arch.dbf) | |
228 | goto out_nodbf; | |
229 | ||
ba5c1e9b CO |
230 | spin_lock_init(&kvm->arch.float_int.lock); |
231 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
232 | ||
b0c632db HC |
233 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
234 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
235 | ||
e08b9637 CO |
236 | if (type & KVM_VM_S390_UCONTROL) { |
237 | kvm->arch.gmap = NULL; | |
238 | } else { | |
239 | kvm->arch.gmap = gmap_alloc(current->mm); | |
240 | if (!kvm->arch.gmap) | |
241 | goto out_nogmap; | |
242 | } | |
fa6b7fe9 CH |
243 | |
244 | kvm->arch.css_support = 0; | |
245 | ||
d89f5eff | 246 | return 0; |
598841ca CO |
247 | out_nogmap: |
248 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
249 | out_nodbf: |
250 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
251 | out_err: |
252 | return rc; | |
b0c632db HC |
253 | } |
254 | ||
d329c035 CB |
255 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
256 | { | |
257 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 258 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
58f9460b CO |
259 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
260 | clear_bit(63 - vcpu->vcpu_id, | |
261 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
262 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
263 | (__u64) vcpu->arch.sie_block) | |
264 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
265 | } | |
abf4a71e | 266 | smp_mb(); |
27e0393f CO |
267 | |
268 | if (kvm_is_ucontrol(vcpu->kvm)) | |
269 | gmap_free(vcpu->arch.gmap); | |
270 | ||
d329c035 | 271 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 272 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
273 | kfree(vcpu); |
274 | } | |
275 | ||
276 | static void kvm_free_vcpus(struct kvm *kvm) | |
277 | { | |
278 | unsigned int i; | |
988a2cae | 279 | struct kvm_vcpu *vcpu; |
d329c035 | 280 | |
988a2cae GN |
281 | kvm_for_each_vcpu(i, vcpu, kvm) |
282 | kvm_arch_vcpu_destroy(vcpu); | |
283 | ||
284 | mutex_lock(&kvm->lock); | |
285 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
286 | kvm->vcpus[i] = NULL; | |
287 | ||
288 | atomic_set(&kvm->online_vcpus, 0); | |
289 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
290 | } |
291 | ||
ad8ba2cd SY |
292 | void kvm_arch_sync_events(struct kvm *kvm) |
293 | { | |
294 | } | |
295 | ||
b0c632db HC |
296 | void kvm_arch_destroy_vm(struct kvm *kvm) |
297 | { | |
d329c035 | 298 | kvm_free_vcpus(kvm); |
b0c632db | 299 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 300 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
301 | if (!kvm_is_ucontrol(kvm)) |
302 | gmap_free(kvm->arch.gmap); | |
b0c632db HC |
303 | } |
304 | ||
305 | /* Section: vcpu related */ | |
306 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
307 | { | |
27e0393f CO |
308 | if (kvm_is_ucontrol(vcpu->kvm)) { |
309 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
310 | if (!vcpu->arch.gmap) | |
311 | return -ENOMEM; | |
312 | return 0; | |
313 | } | |
314 | ||
598841ca | 315 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
316 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
317 | KVM_SYNC_GPRS | | |
9eed0735 CB |
318 | KVM_SYNC_ACRS | |
319 | KVM_SYNC_CRS; | |
b0c632db HC |
320 | return 0; |
321 | } | |
322 | ||
323 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
324 | { | |
6692cef3 | 325 | /* Nothing todo */ |
b0c632db HC |
326 | } |
327 | ||
328 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
329 | { | |
330 | save_fp_regs(&vcpu->arch.host_fpregs); | |
331 | save_access_regs(vcpu->arch.host_acrs); | |
332 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
333 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
59674c1a | 334 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 335 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 336 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
337 | } |
338 | ||
339 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
340 | { | |
9e6dabef | 341 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 342 | gmap_disable(vcpu->arch.gmap); |
b0c632db | 343 | save_fp_regs(&vcpu->arch.guest_fpregs); |
59674c1a | 344 | save_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
345 | restore_fp_regs(&vcpu->arch.host_fpregs); |
346 | restore_access_regs(vcpu->arch.host_acrs); | |
347 | } | |
348 | ||
349 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
350 | { | |
351 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
352 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
353 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 354 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
355 | vcpu->arch.sie_block->cputm = 0UL; |
356 | vcpu->arch.sie_block->ckc = 0UL; | |
357 | vcpu->arch.sie_block->todpr = 0; | |
358 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
359 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
360 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
361 | vcpu->arch.guest_fpregs.fpc = 0; | |
362 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
363 | vcpu->arch.sie_block->gbea = 1; | |
61bde82c | 364 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
365 | } |
366 | ||
42897d86 MT |
367 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
368 | { | |
369 | return 0; | |
370 | } | |
371 | ||
b0c632db HC |
372 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
373 | { | |
9e6dabef CH |
374 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
375 | CPUSTAT_SM | | |
376 | CPUSTAT_STOPPED); | |
fc34531d | 377 | vcpu->arch.sie_block->ecb = 6; |
b0c632db | 378 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 379 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
380 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
381 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
382 | (unsigned long) vcpu); | |
383 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 384 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 385 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
386 | return 0; |
387 | } | |
388 | ||
389 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
390 | unsigned int id) | |
391 | { | |
4d47555a CO |
392 | struct kvm_vcpu *vcpu; |
393 | int rc = -EINVAL; | |
394 | ||
395 | if (id >= KVM_MAX_VCPUS) | |
396 | goto out; | |
397 | ||
398 | rc = -ENOMEM; | |
b0c632db | 399 | |
4d47555a | 400 | vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
b0c632db | 401 | if (!vcpu) |
4d47555a | 402 | goto out; |
b0c632db | 403 | |
180c12fb CB |
404 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
405 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
406 | |
407 | if (!vcpu->arch.sie_block) | |
408 | goto out_free_cpu; | |
409 | ||
410 | vcpu->arch.sie_block->icpua = id; | |
58f9460b CO |
411 | if (!kvm_is_ucontrol(kvm)) { |
412 | if (!kvm->arch.sca) { | |
413 | WARN_ON_ONCE(1); | |
414 | goto out_free_cpu; | |
415 | } | |
416 | if (!kvm->arch.sca->cpu[id].sda) | |
417 | kvm->arch.sca->cpu[id].sda = | |
418 | (__u64) vcpu->arch.sie_block; | |
419 | vcpu->arch.sie_block->scaoh = | |
420 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
421 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
422 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
423 | } | |
b0c632db | 424 | |
ba5c1e9b CO |
425 | spin_lock_init(&vcpu->arch.local_int.lock); |
426 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
427 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 428 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
429 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
430 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 431 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 432 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 433 | |
b0c632db HC |
434 | rc = kvm_vcpu_init(vcpu, kvm, id); |
435 | if (rc) | |
7b06bf2f | 436 | goto out_free_sie_block; |
b0c632db HC |
437 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
438 | vcpu->arch.sie_block); | |
ade38c31 | 439 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 440 | |
b0c632db | 441 | return vcpu; |
7b06bf2f WY |
442 | out_free_sie_block: |
443 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db HC |
444 | out_free_cpu: |
445 | kfree(vcpu); | |
4d47555a | 446 | out: |
b0c632db HC |
447 | return ERR_PTR(rc); |
448 | } | |
449 | ||
b0c632db HC |
450 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
451 | { | |
452 | /* kvm common code refers to this, but never calls it */ | |
453 | BUG(); | |
454 | return 0; | |
455 | } | |
456 | ||
49b99e1e CB |
457 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
458 | { | |
459 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
460 | } | |
461 | ||
462 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
463 | { | |
464 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
465 | } | |
466 | ||
467 | /* | |
468 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
469 | * If the CPU is not running (e.g. waiting as idle) the function will | |
470 | * return immediately. */ | |
471 | void exit_sie(struct kvm_vcpu *vcpu) | |
472 | { | |
473 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
474 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
475 | cpu_relax(); | |
476 | } | |
477 | ||
478 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
479 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
480 | { | |
481 | s390_vcpu_block(vcpu); | |
482 | exit_sie(vcpu); | |
483 | } | |
484 | ||
b6d33834 CD |
485 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
486 | { | |
487 | /* kvm common code refers to this, but never calls it */ | |
488 | BUG(); | |
489 | return 0; | |
490 | } | |
491 | ||
14eebd91 CO |
492 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
493 | struct kvm_one_reg *reg) | |
494 | { | |
495 | int r = -EINVAL; | |
496 | ||
497 | switch (reg->id) { | |
29b7c71b CO |
498 | case KVM_REG_S390_TODPR: |
499 | r = put_user(vcpu->arch.sie_block->todpr, | |
500 | (u32 __user *)reg->addr); | |
501 | break; | |
502 | case KVM_REG_S390_EPOCHDIFF: | |
503 | r = put_user(vcpu->arch.sie_block->epoch, | |
504 | (u64 __user *)reg->addr); | |
505 | break; | |
46a6dd1c J |
506 | case KVM_REG_S390_CPU_TIMER: |
507 | r = put_user(vcpu->arch.sie_block->cputm, | |
508 | (u64 __user *)reg->addr); | |
509 | break; | |
510 | case KVM_REG_S390_CLOCK_COMP: | |
511 | r = put_user(vcpu->arch.sie_block->ckc, | |
512 | (u64 __user *)reg->addr); | |
513 | break; | |
14eebd91 CO |
514 | default: |
515 | break; | |
516 | } | |
517 | ||
518 | return r; | |
519 | } | |
520 | ||
521 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
522 | struct kvm_one_reg *reg) | |
523 | { | |
524 | int r = -EINVAL; | |
525 | ||
526 | switch (reg->id) { | |
29b7c71b CO |
527 | case KVM_REG_S390_TODPR: |
528 | r = get_user(vcpu->arch.sie_block->todpr, | |
529 | (u32 __user *)reg->addr); | |
530 | break; | |
531 | case KVM_REG_S390_EPOCHDIFF: | |
532 | r = get_user(vcpu->arch.sie_block->epoch, | |
533 | (u64 __user *)reg->addr); | |
534 | break; | |
46a6dd1c J |
535 | case KVM_REG_S390_CPU_TIMER: |
536 | r = get_user(vcpu->arch.sie_block->cputm, | |
537 | (u64 __user *)reg->addr); | |
538 | break; | |
539 | case KVM_REG_S390_CLOCK_COMP: | |
540 | r = get_user(vcpu->arch.sie_block->ckc, | |
541 | (u64 __user *)reg->addr); | |
542 | break; | |
14eebd91 CO |
543 | default: |
544 | break; | |
545 | } | |
546 | ||
547 | return r; | |
548 | } | |
b6d33834 | 549 | |
b0c632db HC |
550 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
551 | { | |
b0c632db | 552 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
553 | return 0; |
554 | } | |
555 | ||
556 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
557 | { | |
5a32c1af | 558 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
559 | return 0; |
560 | } | |
561 | ||
562 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
563 | { | |
5a32c1af | 564 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
565 | return 0; |
566 | } | |
567 | ||
568 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
569 | struct kvm_sregs *sregs) | |
570 | { | |
59674c1a | 571 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 572 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 573 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
574 | return 0; |
575 | } | |
576 | ||
577 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
578 | struct kvm_sregs *sregs) | |
579 | { | |
59674c1a | 580 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 581 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
582 | return 0; |
583 | } | |
584 | ||
585 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
586 | { | |
b0c632db | 587 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
85175587 | 588 | vcpu->arch.guest_fpregs.fpc = fpu->fpc & FPC_VALID_MASK; |
7eef87dc | 589 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
b0c632db HC |
590 | return 0; |
591 | } | |
592 | ||
593 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
594 | { | |
b0c632db HC |
595 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
596 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
597 | return 0; |
598 | } | |
599 | ||
600 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
601 | { | |
602 | int rc = 0; | |
603 | ||
9e6dabef | 604 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 605 | rc = -EBUSY; |
d7b0b5eb CO |
606 | else { |
607 | vcpu->run->psw_mask = psw.mask; | |
608 | vcpu->run->psw_addr = psw.addr; | |
609 | } | |
b0c632db HC |
610 | return rc; |
611 | } | |
612 | ||
613 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
614 | struct kvm_translation *tr) | |
615 | { | |
616 | return -EINVAL; /* not implemented yet */ | |
617 | } | |
618 | ||
d0bfb940 JK |
619 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
620 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
621 | { |
622 | return -EINVAL; /* not implemented yet */ | |
623 | } | |
624 | ||
62d9f0db MT |
625 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
626 | struct kvm_mp_state *mp_state) | |
627 | { | |
628 | return -EINVAL; /* not implemented yet */ | |
629 | } | |
630 | ||
631 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
632 | struct kvm_mp_state *mp_state) | |
633 | { | |
634 | return -EINVAL; /* not implemented yet */ | |
635 | } | |
636 | ||
e168bf8d | 637 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
b0c632db | 638 | { |
e168bf8d CO |
639 | int rc; |
640 | ||
5a32c1af | 641 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
642 | |
643 | if (need_resched()) | |
644 | schedule(); | |
645 | ||
71cde587 CB |
646 | if (test_thread_flag(TIF_MCCK_PENDING)) |
647 | s390_handle_mcck(); | |
648 | ||
d6b6d166 CO |
649 | if (!kvm_is_ucontrol(vcpu->kvm)) |
650 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 651 | |
b0c632db | 652 | vcpu->arch.sie_block->icptcode = 0; |
83987ace | 653 | preempt_disable(); |
b0c632db | 654 | kvm_guest_enter(); |
83987ace | 655 | preempt_enable(); |
b0c632db HC |
656 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", |
657 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
5786fffa CH |
658 | trace_kvm_s390_sie_enter(vcpu, |
659 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
5a32c1af | 660 | rc = sie64a(vcpu->arch.sie_block, vcpu->run->s.regs.gprs); |
e168bf8d CO |
661 | if (rc) { |
662 | if (kvm_is_ucontrol(vcpu->kvm)) { | |
663 | rc = SIE_INTERCEPT_UCONTROL; | |
664 | } else { | |
665 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
5786fffa | 666 | trace_kvm_s390_sie_fault(vcpu); |
db4a29cb | 667 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
e168bf8d | 668 | } |
1f0d0f09 | 669 | } |
b0c632db HC |
670 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
671 | vcpu->arch.sie_block->icptcode); | |
5786fffa | 672 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); |
b0c632db | 673 | kvm_guest_exit(); |
b0c632db | 674 | |
5a32c1af | 675 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
e168bf8d | 676 | return rc; |
b0c632db HC |
677 | } |
678 | ||
679 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
680 | { | |
8f2abe6a | 681 | int rc; |
b0c632db HC |
682 | sigset_t sigsaved; |
683 | ||
9ace903d | 684 | rerun_vcpu: |
b0c632db HC |
685 | if (vcpu->sigset_active) |
686 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
687 | ||
9e6dabef | 688 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 689 | |
ba5c1e9b CO |
690 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
691 | ||
8f2abe6a CB |
692 | switch (kvm_run->exit_reason) { |
693 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 694 | case KVM_EXIT_UNKNOWN: |
9ace903d | 695 | case KVM_EXIT_INTR: |
8f2abe6a | 696 | case KVM_EXIT_S390_RESET: |
e168bf8d | 697 | case KVM_EXIT_S390_UCONTROL: |
fa6b7fe9 | 698 | case KVM_EXIT_S390_TSCH: |
8f2abe6a CB |
699 | break; |
700 | default: | |
701 | BUG(); | |
702 | } | |
703 | ||
d7b0b5eb CO |
704 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
705 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
60b413c9 CB |
706 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
707 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; | |
708 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
709 | } | |
9eed0735 CB |
710 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
711 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; | |
712 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
713 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
714 | } | |
d7b0b5eb | 715 | |
dab4079d | 716 | might_fault(); |
8f2abe6a CB |
717 | |
718 | do { | |
e168bf8d CO |
719 | rc = __vcpu_run(vcpu); |
720 | if (rc) | |
721 | break; | |
c0d744a9 CO |
722 | if (kvm_is_ucontrol(vcpu->kvm)) |
723 | rc = -EOPNOTSUPP; | |
724 | else | |
725 | rc = kvm_handle_sie_intercept(vcpu); | |
8f2abe6a CB |
726 | } while (!signal_pending(current) && !rc); |
727 | ||
9ace903d CE |
728 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
729 | goto rerun_vcpu; | |
730 | ||
b1d16c49 CE |
731 | if (signal_pending(current) && !rc) { |
732 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 733 | rc = -EINTR; |
b1d16c49 | 734 | } |
8f2abe6a | 735 | |
e168bf8d CO |
736 | #ifdef CONFIG_KVM_S390_UCONTROL |
737 | if (rc == SIE_INTERCEPT_UCONTROL) { | |
738 | kvm_run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
739 | kvm_run->s390_ucontrol.trans_exc_code = | |
740 | current->thread.gmap_addr; | |
741 | kvm_run->s390_ucontrol.pgm_code = 0x10; | |
742 | rc = 0; | |
743 | } | |
744 | #endif | |
745 | ||
b8e660b8 | 746 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
747 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
748 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
749 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
750 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
751 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
752 | rc = 0; | |
753 | } | |
754 | ||
755 | if (rc == -EREMOTE) { | |
756 | /* intercept was handled, but userspace support is needed | |
757 | * kvm_run has been prepared by the handler */ | |
758 | rc = 0; | |
759 | } | |
b0c632db | 760 | |
d7b0b5eb CO |
761 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
762 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
60b413c9 | 763 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
9eed0735 | 764 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
d7b0b5eb | 765 | |
b0c632db HC |
766 | if (vcpu->sigset_active) |
767 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
768 | ||
b0c632db | 769 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 770 | return rc; |
b0c632db HC |
771 | } |
772 | ||
092670cd | 773 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
774 | unsigned long n, int prefix) |
775 | { | |
776 | if (prefix) | |
777 | return copy_to_guest(vcpu, guestdest, from, n); | |
778 | else | |
779 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
780 | } | |
781 | ||
782 | /* | |
783 | * store status at address | |
784 | * we use have two special cases: | |
785 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
786 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
787 | */ | |
971eb77f | 788 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 789 | { |
092670cd | 790 | unsigned char archmode = 1; |
b0c632db HC |
791 | int prefix; |
792 | ||
793 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
794 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
795 | return -EFAULT; | |
796 | addr = SAVE_AREA_BASE; | |
797 | prefix = 0; | |
798 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
799 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
800 | return -EFAULT; | |
801 | addr = SAVE_AREA_BASE; | |
802 | prefix = 1; | |
803 | } else | |
804 | prefix = 0; | |
805 | ||
15bc8d84 CB |
806 | /* |
807 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
808 | * copying in vcpu load/put. Lets update our copies before we save | |
809 | * it into the save area | |
810 | */ | |
811 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
812 | save_access_regs(vcpu->run->s.regs.acrs); | |
813 | ||
f64ca217 | 814 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
815 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
816 | return -EFAULT; | |
817 | ||
f64ca217 | 818 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
5a32c1af | 819 | vcpu->run->s.regs.gprs, 128, prefix)) |
b0c632db HC |
820 | return -EFAULT; |
821 | ||
f64ca217 | 822 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
823 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
824 | return -EFAULT; | |
825 | ||
f64ca217 | 826 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
827 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
828 | return -EFAULT; | |
829 | ||
830 | if (__guestcopy(vcpu, | |
f64ca217 | 831 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
832 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
833 | return -EFAULT; | |
834 | ||
f64ca217 | 835 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
836 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
837 | return -EFAULT; | |
838 | ||
f64ca217 | 839 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
840 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
841 | return -EFAULT; | |
842 | ||
f64ca217 | 843 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
844 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
845 | return -EFAULT; | |
846 | ||
f64ca217 | 847 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
59674c1a | 848 | &vcpu->run->s.regs.acrs, 64, prefix)) |
b0c632db HC |
849 | return -EFAULT; |
850 | ||
851 | if (__guestcopy(vcpu, | |
f64ca217 | 852 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
853 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
854 | return -EFAULT; | |
855 | return 0; | |
856 | } | |
857 | ||
d6712df9 CH |
858 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
859 | struct kvm_enable_cap *cap) | |
860 | { | |
861 | int r; | |
862 | ||
863 | if (cap->flags) | |
864 | return -EINVAL; | |
865 | ||
866 | switch (cap->cap) { | |
fa6b7fe9 CH |
867 | case KVM_CAP_S390_CSS_SUPPORT: |
868 | if (!vcpu->kvm->arch.css_support) { | |
869 | vcpu->kvm->arch.css_support = 1; | |
870 | trace_kvm_s390_enable_css(vcpu->kvm); | |
871 | } | |
872 | r = 0; | |
873 | break; | |
d6712df9 CH |
874 | default: |
875 | r = -EINVAL; | |
876 | break; | |
877 | } | |
878 | return r; | |
879 | } | |
880 | ||
b0c632db HC |
881 | long kvm_arch_vcpu_ioctl(struct file *filp, |
882 | unsigned int ioctl, unsigned long arg) | |
883 | { | |
884 | struct kvm_vcpu *vcpu = filp->private_data; | |
885 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 886 | long r; |
b0c632db | 887 | |
93736624 AK |
888 | switch (ioctl) { |
889 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
890 | struct kvm_s390_interrupt s390int; |
891 | ||
93736624 | 892 | r = -EFAULT; |
ba5c1e9b | 893 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
894 | break; |
895 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
896 | break; | |
ba5c1e9b | 897 | } |
b0c632db | 898 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
899 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
900 | break; | |
b0c632db HC |
901 | case KVM_S390_SET_INITIAL_PSW: { |
902 | psw_t psw; | |
903 | ||
bc923cc9 | 904 | r = -EFAULT; |
b0c632db | 905 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
906 | break; |
907 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
908 | break; | |
b0c632db HC |
909 | } |
910 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
911 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
912 | break; | |
14eebd91 CO |
913 | case KVM_SET_ONE_REG: |
914 | case KVM_GET_ONE_REG: { | |
915 | struct kvm_one_reg reg; | |
916 | r = -EFAULT; | |
917 | if (copy_from_user(®, argp, sizeof(reg))) | |
918 | break; | |
919 | if (ioctl == KVM_SET_ONE_REG) | |
920 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
921 | else | |
922 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
923 | break; | |
924 | } | |
27e0393f CO |
925 | #ifdef CONFIG_KVM_S390_UCONTROL |
926 | case KVM_S390_UCAS_MAP: { | |
927 | struct kvm_s390_ucas_mapping ucasmap; | |
928 | ||
929 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
930 | r = -EFAULT; | |
931 | break; | |
932 | } | |
933 | ||
934 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
935 | r = -EINVAL; | |
936 | break; | |
937 | } | |
938 | ||
939 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
940 | ucasmap.vcpu_addr, ucasmap.length); | |
941 | break; | |
942 | } | |
943 | case KVM_S390_UCAS_UNMAP: { | |
944 | struct kvm_s390_ucas_mapping ucasmap; | |
945 | ||
946 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
947 | r = -EFAULT; | |
948 | break; | |
949 | } | |
950 | ||
951 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
952 | r = -EINVAL; | |
953 | break; | |
954 | } | |
955 | ||
956 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
957 | ucasmap.length); | |
958 | break; | |
959 | } | |
960 | #endif | |
ccc7910f CO |
961 | case KVM_S390_VCPU_FAULT: { |
962 | r = gmap_fault(arg, vcpu->arch.gmap); | |
963 | if (!IS_ERR_VALUE(r)) | |
964 | r = 0; | |
965 | break; | |
966 | } | |
d6712df9 CH |
967 | case KVM_ENABLE_CAP: |
968 | { | |
969 | struct kvm_enable_cap cap; | |
970 | r = -EFAULT; | |
971 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
972 | break; | |
973 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
974 | break; | |
975 | } | |
b0c632db | 976 | default: |
3e6afcf1 | 977 | r = -ENOTTY; |
b0c632db | 978 | } |
bc923cc9 | 979 | return r; |
b0c632db HC |
980 | } |
981 | ||
5b1c1493 CO |
982 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
983 | { | |
984 | #ifdef CONFIG_KVM_S390_UCONTROL | |
985 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
986 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
987 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
988 | get_page(vmf->page); | |
989 | return 0; | |
990 | } | |
991 | #endif | |
992 | return VM_FAULT_SIGBUS; | |
993 | } | |
994 | ||
db3fe4eb TY |
995 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, |
996 | struct kvm_memory_slot *dont) | |
997 | { | |
998 | } | |
999 | ||
1000 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) | |
1001 | { | |
1002 | return 0; | |
1003 | } | |
1004 | ||
b0c632db | 1005 | /* Section: memory related */ |
f7784b8e MT |
1006 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
1007 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
1008 | struct kvm_userspace_memory_region *mem, |
1009 | enum kvm_mr_change change) | |
b0c632db | 1010 | { |
dd2887e7 NW |
1011 | /* A few sanity checks. We can have memory slots which have to be |
1012 | located/ended at a segment boundary (1MB). The memory in userland is | |
1013 | ok to be fragmented into various different vmas. It is okay to mmap() | |
1014 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 1015 | |
598841ca | 1016 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
1017 | return -EINVAL; |
1018 | ||
598841ca | 1019 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
1020 | return -EINVAL; |
1021 | ||
f7784b8e MT |
1022 | return 0; |
1023 | } | |
1024 | ||
1025 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
1026 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
1027 | const struct kvm_memory_slot *old, |
1028 | enum kvm_mr_change change) | |
f7784b8e | 1029 | { |
f7850c92 | 1030 | int rc; |
f7784b8e | 1031 | |
2cef4deb CB |
1032 | /* If the basics of the memslot do not change, we do not want |
1033 | * to update the gmap. Every update causes several unnecessary | |
1034 | * segment translation exceptions. This is usually handled just | |
1035 | * fine by the normal fault handler + gmap, but it will also | |
1036 | * cause faults on the prefix page of running guest CPUs. | |
1037 | */ | |
1038 | if (old->userspace_addr == mem->userspace_addr && | |
1039 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
1040 | old->npages * PAGE_SIZE == mem->memory_size) | |
1041 | return; | |
598841ca CO |
1042 | |
1043 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
1044 | mem->guest_phys_addr, mem->memory_size); | |
1045 | if (rc) | |
f7850c92 | 1046 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 1047 | return; |
b0c632db HC |
1048 | } |
1049 | ||
2df72e9b MT |
1050 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
1051 | { | |
1052 | } | |
1053 | ||
1054 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, | |
1055 | struct kvm_memory_slot *slot) | |
34d4cb8f MT |
1056 | { |
1057 | } | |
1058 | ||
b0c632db HC |
1059 | static int __init kvm_s390_init(void) |
1060 | { | |
ef50f7ac | 1061 | int ret; |
0ee75bea | 1062 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
1063 | if (ret) |
1064 | return ret; | |
1065 | ||
1066 | /* | |
1067 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 1068 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
1069 | * only set facilities that are known to work in KVM. |
1070 | */ | |
c2f0e8c8 | 1071 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
1072 | if (!facilities) { |
1073 | kvm_exit(); | |
1074 | return -ENOMEM; | |
1075 | } | |
14375bc4 | 1076 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
6d00d00b | 1077 | facilities[0] &= 0xff00fff3f47c0000ULL; |
87cac8f8 | 1078 | facilities[1] &= 0x001c000000000000ULL; |
ef50f7ac | 1079 | return 0; |
b0c632db HC |
1080 | } |
1081 | ||
1082 | static void __exit kvm_s390_exit(void) | |
1083 | { | |
ef50f7ac | 1084 | free_page((unsigned long) facilities); |
b0c632db HC |
1085 | kvm_exit(); |
1086 | } | |
1087 | ||
1088 | module_init(kvm_s390_init); | |
1089 | module_exit(kvm_s390_exit); |