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: |
d7b0b5eb CO |
143 | r = 1; |
144 | break; | |
e726b1bd CB |
145 | case KVM_CAP_NR_VCPUS: |
146 | case KVM_CAP_MAX_VCPUS: | |
147 | r = KVM_MAX_VCPUS; | |
148 | break; | |
1526bf9c | 149 | case KVM_CAP_S390_COW: |
abf09bed | 150 | r = MACHINE_HAS_ESOP; |
1526bf9c | 151 | break; |
2bd0ac4e | 152 | default: |
d7b0b5eb | 153 | r = 0; |
2bd0ac4e | 154 | } |
d7b0b5eb | 155 | return r; |
b0c632db HC |
156 | } |
157 | ||
158 | /* Section: vm related */ | |
159 | /* | |
160 | * Get (and clear) the dirty memory log for a memory slot. | |
161 | */ | |
162 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
163 | struct kvm_dirty_log *log) | |
164 | { | |
165 | return 0; | |
166 | } | |
167 | ||
168 | long kvm_arch_vm_ioctl(struct file *filp, | |
169 | unsigned int ioctl, unsigned long arg) | |
170 | { | |
171 | struct kvm *kvm = filp->private_data; | |
172 | void __user *argp = (void __user *)arg; | |
173 | int r; | |
174 | ||
175 | switch (ioctl) { | |
ba5c1e9b CO |
176 | case KVM_S390_INTERRUPT: { |
177 | struct kvm_s390_interrupt s390int; | |
178 | ||
179 | r = -EFAULT; | |
180 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
181 | break; | |
182 | r = kvm_s390_inject_vm(kvm, &s390int); | |
183 | break; | |
184 | } | |
b0c632db | 185 | default: |
367e1319 | 186 | r = -ENOTTY; |
b0c632db HC |
187 | } |
188 | ||
189 | return r; | |
190 | } | |
191 | ||
e08b9637 | 192 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 193 | { |
b0c632db HC |
194 | int rc; |
195 | char debug_name[16]; | |
196 | ||
e08b9637 CO |
197 | rc = -EINVAL; |
198 | #ifdef CONFIG_KVM_S390_UCONTROL | |
199 | if (type & ~KVM_VM_S390_UCONTROL) | |
200 | goto out_err; | |
201 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
202 | goto out_err; | |
203 | #else | |
204 | if (type) | |
205 | goto out_err; | |
206 | #endif | |
207 | ||
b0c632db HC |
208 | rc = s390_enable_sie(); |
209 | if (rc) | |
d89f5eff | 210 | goto out_err; |
b0c632db | 211 | |
b290411a CO |
212 | rc = -ENOMEM; |
213 | ||
b0c632db HC |
214 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
215 | if (!kvm->arch.sca) | |
d89f5eff | 216 | goto out_err; |
b0c632db HC |
217 | |
218 | sprintf(debug_name, "kvm-%u", current->pid); | |
219 | ||
220 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
221 | if (!kvm->arch.dbf) | |
222 | goto out_nodbf; | |
223 | ||
ba5c1e9b CO |
224 | spin_lock_init(&kvm->arch.float_int.lock); |
225 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
226 | ||
b0c632db HC |
227 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
228 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
229 | ||
e08b9637 CO |
230 | if (type & KVM_VM_S390_UCONTROL) { |
231 | kvm->arch.gmap = NULL; | |
232 | } else { | |
233 | kvm->arch.gmap = gmap_alloc(current->mm); | |
234 | if (!kvm->arch.gmap) | |
235 | goto out_nogmap; | |
236 | } | |
d89f5eff | 237 | return 0; |
598841ca CO |
238 | out_nogmap: |
239 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
240 | out_nodbf: |
241 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
242 | out_err: |
243 | return rc; | |
b0c632db HC |
244 | } |
245 | ||
d329c035 CB |
246 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
247 | { | |
248 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 249 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
58f9460b CO |
250 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
251 | clear_bit(63 - vcpu->vcpu_id, | |
252 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
253 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
254 | (__u64) vcpu->arch.sie_block) | |
255 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
256 | } | |
abf4a71e | 257 | smp_mb(); |
27e0393f CO |
258 | |
259 | if (kvm_is_ucontrol(vcpu->kvm)) | |
260 | gmap_free(vcpu->arch.gmap); | |
261 | ||
d329c035 | 262 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 263 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
264 | kfree(vcpu); |
265 | } | |
266 | ||
267 | static void kvm_free_vcpus(struct kvm *kvm) | |
268 | { | |
269 | unsigned int i; | |
988a2cae | 270 | struct kvm_vcpu *vcpu; |
d329c035 | 271 | |
988a2cae GN |
272 | kvm_for_each_vcpu(i, vcpu, kvm) |
273 | kvm_arch_vcpu_destroy(vcpu); | |
274 | ||
275 | mutex_lock(&kvm->lock); | |
276 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
277 | kvm->vcpus[i] = NULL; | |
278 | ||
279 | atomic_set(&kvm->online_vcpus, 0); | |
280 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
281 | } |
282 | ||
ad8ba2cd SY |
283 | void kvm_arch_sync_events(struct kvm *kvm) |
284 | { | |
285 | } | |
286 | ||
b0c632db HC |
287 | void kvm_arch_destroy_vm(struct kvm *kvm) |
288 | { | |
d329c035 | 289 | kvm_free_vcpus(kvm); |
b0c632db | 290 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 291 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
292 | if (!kvm_is_ucontrol(kvm)) |
293 | gmap_free(kvm->arch.gmap); | |
b0c632db HC |
294 | } |
295 | ||
296 | /* Section: vcpu related */ | |
297 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
298 | { | |
27e0393f CO |
299 | if (kvm_is_ucontrol(vcpu->kvm)) { |
300 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
301 | if (!vcpu->arch.gmap) | |
302 | return -ENOMEM; | |
303 | return 0; | |
304 | } | |
305 | ||
598841ca | 306 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
307 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
308 | KVM_SYNC_GPRS | | |
9eed0735 CB |
309 | KVM_SYNC_ACRS | |
310 | KVM_SYNC_CRS; | |
b0c632db HC |
311 | return 0; |
312 | } | |
313 | ||
314 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
315 | { | |
6692cef3 | 316 | /* Nothing todo */ |
b0c632db HC |
317 | } |
318 | ||
319 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
320 | { | |
321 | save_fp_regs(&vcpu->arch.host_fpregs); | |
322 | save_access_regs(vcpu->arch.host_acrs); | |
323 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
324 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
59674c1a | 325 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 326 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 327 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
328 | } |
329 | ||
330 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
331 | { | |
9e6dabef | 332 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 333 | gmap_disable(vcpu->arch.gmap); |
b0c632db | 334 | save_fp_regs(&vcpu->arch.guest_fpregs); |
59674c1a | 335 | save_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
336 | restore_fp_regs(&vcpu->arch.host_fpregs); |
337 | restore_access_regs(vcpu->arch.host_acrs); | |
338 | } | |
339 | ||
340 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
341 | { | |
342 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
343 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
344 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 345 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
346 | vcpu->arch.sie_block->cputm = 0UL; |
347 | vcpu->arch.sie_block->ckc = 0UL; | |
348 | vcpu->arch.sie_block->todpr = 0; | |
349 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
350 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
351 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
352 | vcpu->arch.guest_fpregs.fpc = 0; | |
353 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
354 | vcpu->arch.sie_block->gbea = 1; | |
61bde82c | 355 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
356 | } |
357 | ||
42897d86 MT |
358 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
359 | { | |
360 | return 0; | |
361 | } | |
362 | ||
b0c632db HC |
363 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
364 | { | |
9e6dabef CH |
365 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
366 | CPUSTAT_SM | | |
367 | CPUSTAT_STOPPED); | |
fc34531d | 368 | vcpu->arch.sie_block->ecb = 6; |
b0c632db | 369 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 370 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
371 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
372 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
373 | (unsigned long) vcpu); | |
374 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 375 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 376 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
377 | return 0; |
378 | } | |
379 | ||
380 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
381 | unsigned int id) | |
382 | { | |
4d47555a CO |
383 | struct kvm_vcpu *vcpu; |
384 | int rc = -EINVAL; | |
385 | ||
386 | if (id >= KVM_MAX_VCPUS) | |
387 | goto out; | |
388 | ||
389 | rc = -ENOMEM; | |
b0c632db | 390 | |
4d47555a | 391 | vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
b0c632db | 392 | if (!vcpu) |
4d47555a | 393 | goto out; |
b0c632db | 394 | |
180c12fb CB |
395 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
396 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
397 | |
398 | if (!vcpu->arch.sie_block) | |
399 | goto out_free_cpu; | |
400 | ||
401 | vcpu->arch.sie_block->icpua = id; | |
58f9460b CO |
402 | if (!kvm_is_ucontrol(kvm)) { |
403 | if (!kvm->arch.sca) { | |
404 | WARN_ON_ONCE(1); | |
405 | goto out_free_cpu; | |
406 | } | |
407 | if (!kvm->arch.sca->cpu[id].sda) | |
408 | kvm->arch.sca->cpu[id].sda = | |
409 | (__u64) vcpu->arch.sie_block; | |
410 | vcpu->arch.sie_block->scaoh = | |
411 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
412 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
413 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
414 | } | |
b0c632db | 415 | |
ba5c1e9b CO |
416 | spin_lock_init(&vcpu->arch.local_int.lock); |
417 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
418 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 419 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
420 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
421 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 422 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 423 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 424 | |
b0c632db HC |
425 | rc = kvm_vcpu_init(vcpu, kvm, id); |
426 | if (rc) | |
7b06bf2f | 427 | goto out_free_sie_block; |
b0c632db HC |
428 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
429 | vcpu->arch.sie_block); | |
ade38c31 | 430 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 431 | |
b0c632db | 432 | return vcpu; |
7b06bf2f WY |
433 | out_free_sie_block: |
434 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db HC |
435 | out_free_cpu: |
436 | kfree(vcpu); | |
4d47555a | 437 | out: |
b0c632db HC |
438 | return ERR_PTR(rc); |
439 | } | |
440 | ||
b0c632db HC |
441 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
442 | { | |
443 | /* kvm common code refers to this, but never calls it */ | |
444 | BUG(); | |
445 | return 0; | |
446 | } | |
447 | ||
b6d33834 CD |
448 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
449 | { | |
450 | /* kvm common code refers to this, but never calls it */ | |
451 | BUG(); | |
452 | return 0; | |
453 | } | |
454 | ||
14eebd91 CO |
455 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
456 | struct kvm_one_reg *reg) | |
457 | { | |
458 | int r = -EINVAL; | |
459 | ||
460 | switch (reg->id) { | |
29b7c71b CO |
461 | case KVM_REG_S390_TODPR: |
462 | r = put_user(vcpu->arch.sie_block->todpr, | |
463 | (u32 __user *)reg->addr); | |
464 | break; | |
465 | case KVM_REG_S390_EPOCHDIFF: | |
466 | r = put_user(vcpu->arch.sie_block->epoch, | |
467 | (u64 __user *)reg->addr); | |
468 | break; | |
46a6dd1c J |
469 | case KVM_REG_S390_CPU_TIMER: |
470 | r = put_user(vcpu->arch.sie_block->cputm, | |
471 | (u64 __user *)reg->addr); | |
472 | break; | |
473 | case KVM_REG_S390_CLOCK_COMP: | |
474 | r = put_user(vcpu->arch.sie_block->ckc, | |
475 | (u64 __user *)reg->addr); | |
476 | break; | |
14eebd91 CO |
477 | default: |
478 | break; | |
479 | } | |
480 | ||
481 | return r; | |
482 | } | |
483 | ||
484 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
485 | struct kvm_one_reg *reg) | |
486 | { | |
487 | int r = -EINVAL; | |
488 | ||
489 | switch (reg->id) { | |
29b7c71b CO |
490 | case KVM_REG_S390_TODPR: |
491 | r = get_user(vcpu->arch.sie_block->todpr, | |
492 | (u32 __user *)reg->addr); | |
493 | break; | |
494 | case KVM_REG_S390_EPOCHDIFF: | |
495 | r = get_user(vcpu->arch.sie_block->epoch, | |
496 | (u64 __user *)reg->addr); | |
497 | break; | |
46a6dd1c J |
498 | case KVM_REG_S390_CPU_TIMER: |
499 | r = get_user(vcpu->arch.sie_block->cputm, | |
500 | (u64 __user *)reg->addr); | |
501 | break; | |
502 | case KVM_REG_S390_CLOCK_COMP: | |
503 | r = get_user(vcpu->arch.sie_block->ckc, | |
504 | (u64 __user *)reg->addr); | |
505 | break; | |
14eebd91 CO |
506 | default: |
507 | break; | |
508 | } | |
509 | ||
510 | return r; | |
511 | } | |
b6d33834 | 512 | |
b0c632db HC |
513 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
514 | { | |
b0c632db | 515 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
516 | return 0; |
517 | } | |
518 | ||
519 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
520 | { | |
5a32c1af | 521 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
522 | return 0; |
523 | } | |
524 | ||
525 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
526 | { | |
5a32c1af | 527 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
528 | return 0; |
529 | } | |
530 | ||
531 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
532 | struct kvm_sregs *sregs) | |
533 | { | |
59674c1a | 534 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 535 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 536 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
537 | return 0; |
538 | } | |
539 | ||
540 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
541 | struct kvm_sregs *sregs) | |
542 | { | |
59674c1a | 543 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 544 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
545 | return 0; |
546 | } | |
547 | ||
548 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
549 | { | |
b0c632db | 550 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
85175587 | 551 | vcpu->arch.guest_fpregs.fpc = fpu->fpc & FPC_VALID_MASK; |
7eef87dc | 552 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
b0c632db HC |
553 | return 0; |
554 | } | |
555 | ||
556 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
557 | { | |
b0c632db HC |
558 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
559 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
560 | return 0; |
561 | } | |
562 | ||
563 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
564 | { | |
565 | int rc = 0; | |
566 | ||
9e6dabef | 567 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 568 | rc = -EBUSY; |
d7b0b5eb CO |
569 | else { |
570 | vcpu->run->psw_mask = psw.mask; | |
571 | vcpu->run->psw_addr = psw.addr; | |
572 | } | |
b0c632db HC |
573 | return rc; |
574 | } | |
575 | ||
576 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
577 | struct kvm_translation *tr) | |
578 | { | |
579 | return -EINVAL; /* not implemented yet */ | |
580 | } | |
581 | ||
d0bfb940 JK |
582 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
583 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
584 | { |
585 | return -EINVAL; /* not implemented yet */ | |
586 | } | |
587 | ||
62d9f0db MT |
588 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
589 | struct kvm_mp_state *mp_state) | |
590 | { | |
591 | return -EINVAL; /* not implemented yet */ | |
592 | } | |
593 | ||
594 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
595 | struct kvm_mp_state *mp_state) | |
596 | { | |
597 | return -EINVAL; /* not implemented yet */ | |
598 | } | |
599 | ||
e168bf8d | 600 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
b0c632db | 601 | { |
e168bf8d CO |
602 | int rc; |
603 | ||
5a32c1af | 604 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
605 | |
606 | if (need_resched()) | |
607 | schedule(); | |
608 | ||
71cde587 CB |
609 | if (test_thread_flag(TIF_MCCK_PENDING)) |
610 | s390_handle_mcck(); | |
611 | ||
d6b6d166 CO |
612 | if (!kvm_is_ucontrol(vcpu->kvm)) |
613 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 614 | |
b0c632db | 615 | vcpu->arch.sie_block->icptcode = 0; |
83987ace | 616 | preempt_disable(); |
b0c632db | 617 | kvm_guest_enter(); |
83987ace | 618 | preempt_enable(); |
b0c632db HC |
619 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", |
620 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
5786fffa CH |
621 | trace_kvm_s390_sie_enter(vcpu, |
622 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
5a32c1af | 623 | rc = sie64a(vcpu->arch.sie_block, vcpu->run->s.regs.gprs); |
e168bf8d CO |
624 | if (rc) { |
625 | if (kvm_is_ucontrol(vcpu->kvm)) { | |
626 | rc = SIE_INTERCEPT_UCONTROL; | |
627 | } else { | |
628 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
5786fffa | 629 | trace_kvm_s390_sie_fault(vcpu); |
e168bf8d CO |
630 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
631 | rc = 0; | |
632 | } | |
1f0d0f09 | 633 | } |
b0c632db HC |
634 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
635 | vcpu->arch.sie_block->icptcode); | |
5786fffa | 636 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); |
b0c632db | 637 | kvm_guest_exit(); |
b0c632db | 638 | |
5a32c1af | 639 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
e168bf8d | 640 | return rc; |
b0c632db HC |
641 | } |
642 | ||
643 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
644 | { | |
8f2abe6a | 645 | int rc; |
b0c632db HC |
646 | sigset_t sigsaved; |
647 | ||
9ace903d | 648 | rerun_vcpu: |
b0c632db HC |
649 | if (vcpu->sigset_active) |
650 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
651 | ||
9e6dabef | 652 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 653 | |
ba5c1e9b CO |
654 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
655 | ||
8f2abe6a CB |
656 | switch (kvm_run->exit_reason) { |
657 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 658 | case KVM_EXIT_UNKNOWN: |
9ace903d | 659 | case KVM_EXIT_INTR: |
8f2abe6a | 660 | case KVM_EXIT_S390_RESET: |
e168bf8d | 661 | case KVM_EXIT_S390_UCONTROL: |
8f2abe6a CB |
662 | break; |
663 | default: | |
664 | BUG(); | |
665 | } | |
666 | ||
d7b0b5eb CO |
667 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
668 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
60b413c9 CB |
669 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
670 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; | |
671 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
672 | } | |
9eed0735 CB |
673 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
674 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; | |
675 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
676 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
677 | } | |
d7b0b5eb | 678 | |
dab4079d | 679 | might_fault(); |
8f2abe6a CB |
680 | |
681 | do { | |
e168bf8d CO |
682 | rc = __vcpu_run(vcpu); |
683 | if (rc) | |
684 | break; | |
c0d744a9 CO |
685 | if (kvm_is_ucontrol(vcpu->kvm)) |
686 | rc = -EOPNOTSUPP; | |
687 | else | |
688 | rc = kvm_handle_sie_intercept(vcpu); | |
8f2abe6a CB |
689 | } while (!signal_pending(current) && !rc); |
690 | ||
9ace903d CE |
691 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
692 | goto rerun_vcpu; | |
693 | ||
b1d16c49 CE |
694 | if (signal_pending(current) && !rc) { |
695 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 696 | rc = -EINTR; |
b1d16c49 | 697 | } |
8f2abe6a | 698 | |
e168bf8d CO |
699 | #ifdef CONFIG_KVM_S390_UCONTROL |
700 | if (rc == SIE_INTERCEPT_UCONTROL) { | |
701 | kvm_run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
702 | kvm_run->s390_ucontrol.trans_exc_code = | |
703 | current->thread.gmap_addr; | |
704 | kvm_run->s390_ucontrol.pgm_code = 0x10; | |
705 | rc = 0; | |
706 | } | |
707 | #endif | |
708 | ||
b8e660b8 | 709 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
710 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
711 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
712 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
713 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
714 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
715 | rc = 0; | |
716 | } | |
717 | ||
718 | if (rc == -EREMOTE) { | |
719 | /* intercept was handled, but userspace support is needed | |
720 | * kvm_run has been prepared by the handler */ | |
721 | rc = 0; | |
722 | } | |
b0c632db | 723 | |
d7b0b5eb CO |
724 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
725 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
60b413c9 | 726 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
9eed0735 | 727 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
d7b0b5eb | 728 | |
b0c632db HC |
729 | if (vcpu->sigset_active) |
730 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
731 | ||
b0c632db | 732 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 733 | return rc; |
b0c632db HC |
734 | } |
735 | ||
092670cd | 736 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
737 | unsigned long n, int prefix) |
738 | { | |
739 | if (prefix) | |
740 | return copy_to_guest(vcpu, guestdest, from, n); | |
741 | else | |
742 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
743 | } | |
744 | ||
745 | /* | |
746 | * store status at address | |
747 | * we use have two special cases: | |
748 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
749 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
750 | */ | |
971eb77f | 751 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 752 | { |
092670cd | 753 | unsigned char archmode = 1; |
b0c632db HC |
754 | int prefix; |
755 | ||
756 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
757 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
758 | return -EFAULT; | |
759 | addr = SAVE_AREA_BASE; | |
760 | prefix = 0; | |
761 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
762 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
763 | return -EFAULT; | |
764 | addr = SAVE_AREA_BASE; | |
765 | prefix = 1; | |
766 | } else | |
767 | prefix = 0; | |
768 | ||
f64ca217 | 769 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
770 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
771 | return -EFAULT; | |
772 | ||
f64ca217 | 773 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
5a32c1af | 774 | vcpu->run->s.regs.gprs, 128, prefix)) |
b0c632db HC |
775 | return -EFAULT; |
776 | ||
f64ca217 | 777 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
778 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
779 | return -EFAULT; | |
780 | ||
f64ca217 | 781 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
782 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
783 | return -EFAULT; | |
784 | ||
785 | if (__guestcopy(vcpu, | |
f64ca217 | 786 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
787 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
788 | return -EFAULT; | |
789 | ||
f64ca217 | 790 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
791 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
792 | return -EFAULT; | |
793 | ||
f64ca217 | 794 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
795 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
796 | return -EFAULT; | |
797 | ||
f64ca217 | 798 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
799 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
800 | return -EFAULT; | |
801 | ||
f64ca217 | 802 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
59674c1a | 803 | &vcpu->run->s.regs.acrs, 64, prefix)) |
b0c632db HC |
804 | return -EFAULT; |
805 | ||
806 | if (__guestcopy(vcpu, | |
f64ca217 | 807 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
808 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
809 | return -EFAULT; | |
810 | return 0; | |
811 | } | |
812 | ||
b0c632db HC |
813 | long kvm_arch_vcpu_ioctl(struct file *filp, |
814 | unsigned int ioctl, unsigned long arg) | |
815 | { | |
816 | struct kvm_vcpu *vcpu = filp->private_data; | |
817 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 818 | long r; |
b0c632db | 819 | |
93736624 AK |
820 | switch (ioctl) { |
821 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
822 | struct kvm_s390_interrupt s390int; |
823 | ||
93736624 | 824 | r = -EFAULT; |
ba5c1e9b | 825 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
826 | break; |
827 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
828 | break; | |
ba5c1e9b | 829 | } |
b0c632db | 830 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
831 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
832 | break; | |
b0c632db HC |
833 | case KVM_S390_SET_INITIAL_PSW: { |
834 | psw_t psw; | |
835 | ||
bc923cc9 | 836 | r = -EFAULT; |
b0c632db | 837 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
838 | break; |
839 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
840 | break; | |
b0c632db HC |
841 | } |
842 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
843 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
844 | break; | |
14eebd91 CO |
845 | case KVM_SET_ONE_REG: |
846 | case KVM_GET_ONE_REG: { | |
847 | struct kvm_one_reg reg; | |
848 | r = -EFAULT; | |
849 | if (copy_from_user(®, argp, sizeof(reg))) | |
850 | break; | |
851 | if (ioctl == KVM_SET_ONE_REG) | |
852 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
853 | else | |
854 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
855 | break; | |
856 | } | |
27e0393f CO |
857 | #ifdef CONFIG_KVM_S390_UCONTROL |
858 | case KVM_S390_UCAS_MAP: { | |
859 | struct kvm_s390_ucas_mapping ucasmap; | |
860 | ||
861 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
862 | r = -EFAULT; | |
863 | break; | |
864 | } | |
865 | ||
866 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
867 | r = -EINVAL; | |
868 | break; | |
869 | } | |
870 | ||
871 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
872 | ucasmap.vcpu_addr, ucasmap.length); | |
873 | break; | |
874 | } | |
875 | case KVM_S390_UCAS_UNMAP: { | |
876 | struct kvm_s390_ucas_mapping ucasmap; | |
877 | ||
878 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
879 | r = -EFAULT; | |
880 | break; | |
881 | } | |
882 | ||
883 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
884 | r = -EINVAL; | |
885 | break; | |
886 | } | |
887 | ||
888 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
889 | ucasmap.length); | |
890 | break; | |
891 | } | |
892 | #endif | |
ccc7910f CO |
893 | case KVM_S390_VCPU_FAULT: { |
894 | r = gmap_fault(arg, vcpu->arch.gmap); | |
895 | if (!IS_ERR_VALUE(r)) | |
896 | r = 0; | |
897 | break; | |
898 | } | |
b0c632db | 899 | default: |
3e6afcf1 | 900 | r = -ENOTTY; |
b0c632db | 901 | } |
bc923cc9 | 902 | return r; |
b0c632db HC |
903 | } |
904 | ||
5b1c1493 CO |
905 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
906 | { | |
907 | #ifdef CONFIG_KVM_S390_UCONTROL | |
908 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
909 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
910 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
911 | get_page(vmf->page); | |
912 | return 0; | |
913 | } | |
914 | #endif | |
915 | return VM_FAULT_SIGBUS; | |
916 | } | |
917 | ||
db3fe4eb TY |
918 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, |
919 | struct kvm_memory_slot *dont) | |
920 | { | |
921 | } | |
922 | ||
923 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) | |
924 | { | |
925 | return 0; | |
926 | } | |
927 | ||
b0c632db | 928 | /* Section: memory related */ |
f7784b8e MT |
929 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
930 | struct kvm_memory_slot *memslot, | |
931 | struct kvm_memory_slot old, | |
932 | struct kvm_userspace_memory_region *mem, | |
933 | int user_alloc) | |
b0c632db HC |
934 | { |
935 | /* A few sanity checks. We can have exactly one memory slot which has | |
936 | to start at guest virtual zero and which has to be located at a | |
937 | page boundary in userland and which has to end at a page boundary. | |
938 | The memory in userland is ok to be fragmented into various different | |
939 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
940 | doing this call at any time */ | |
941 | ||
628eb9b8 | 942 | if (mem->slot) |
b0c632db HC |
943 | return -EINVAL; |
944 | ||
945 | if (mem->guest_phys_addr) | |
946 | return -EINVAL; | |
947 | ||
598841ca | 948 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
949 | return -EINVAL; |
950 | ||
598841ca | 951 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
952 | return -EINVAL; |
953 | ||
2668dab7 CO |
954 | if (!user_alloc) |
955 | return -EINVAL; | |
956 | ||
f7784b8e MT |
957 | return 0; |
958 | } | |
959 | ||
960 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
961 | struct kvm_userspace_memory_region *mem, | |
962 | struct kvm_memory_slot old, | |
963 | int user_alloc) | |
964 | { | |
f7850c92 | 965 | int rc; |
f7784b8e | 966 | |
598841ca CO |
967 | |
968 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
969 | mem->guest_phys_addr, mem->memory_size); | |
970 | if (rc) | |
f7850c92 | 971 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 972 | return; |
b0c632db HC |
973 | } |
974 | ||
2df72e9b MT |
975 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
976 | { | |
977 | } | |
978 | ||
979 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, | |
980 | struct kvm_memory_slot *slot) | |
34d4cb8f MT |
981 | { |
982 | } | |
983 | ||
b0c632db HC |
984 | static int __init kvm_s390_init(void) |
985 | { | |
ef50f7ac | 986 | int ret; |
0ee75bea | 987 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
988 | if (ret) |
989 | return ret; | |
990 | ||
991 | /* | |
992 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 993 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
994 | * only set facilities that are known to work in KVM. |
995 | */ | |
c2f0e8c8 | 996 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
997 | if (!facilities) { |
998 | kvm_exit(); | |
999 | return -ENOMEM; | |
1000 | } | |
14375bc4 | 1001 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
6d00d00b | 1002 | facilities[0] &= 0xff00fff3f47c0000ULL; |
87cac8f8 | 1003 | facilities[1] &= 0x001c000000000000ULL; |
ef50f7ac | 1004 | return 0; |
b0c632db HC |
1005 | } |
1006 | ||
1007 | static void __exit kvm_s390_exit(void) | |
1008 | { | |
ef50f7ac | 1009 | free_page((unsigned long) facilities); |
b0c632db HC |
1010 | kvm_exit(); |
1011 | } | |
1012 | ||
1013 | module_init(kvm_s390_init); | |
1014 | module_exit(kvm_s390_exit); |