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Commit | Line | Data |
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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: |
d7b0b5eb CO |
145 | r = 1; |
146 | break; | |
e726b1bd CB |
147 | case KVM_CAP_NR_VCPUS: |
148 | case KVM_CAP_MAX_VCPUS: | |
149 | r = KVM_MAX_VCPUS; | |
150 | break; | |
1526bf9c | 151 | case KVM_CAP_S390_COW: |
abf09bed | 152 | r = MACHINE_HAS_ESOP; |
1526bf9c | 153 | break; |
2bd0ac4e | 154 | default: |
d7b0b5eb | 155 | r = 0; |
2bd0ac4e | 156 | } |
d7b0b5eb | 157 | return r; |
b0c632db HC |
158 | } |
159 | ||
160 | /* Section: vm related */ | |
161 | /* | |
162 | * Get (and clear) the dirty memory log for a memory slot. | |
163 | */ | |
164 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
165 | struct kvm_dirty_log *log) | |
166 | { | |
167 | return 0; | |
168 | } | |
169 | ||
170 | long kvm_arch_vm_ioctl(struct file *filp, | |
171 | unsigned int ioctl, unsigned long arg) | |
172 | { | |
173 | struct kvm *kvm = filp->private_data; | |
174 | void __user *argp = (void __user *)arg; | |
175 | int r; | |
176 | ||
177 | switch (ioctl) { | |
ba5c1e9b CO |
178 | case KVM_S390_INTERRUPT: { |
179 | struct kvm_s390_interrupt s390int; | |
180 | ||
181 | r = -EFAULT; | |
182 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
183 | break; | |
184 | r = kvm_s390_inject_vm(kvm, &s390int); | |
185 | break; | |
186 | } | |
b0c632db | 187 | default: |
367e1319 | 188 | r = -ENOTTY; |
b0c632db HC |
189 | } |
190 | ||
191 | return r; | |
192 | } | |
193 | ||
e08b9637 | 194 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 195 | { |
b0c632db HC |
196 | int rc; |
197 | char debug_name[16]; | |
198 | ||
e08b9637 CO |
199 | rc = -EINVAL; |
200 | #ifdef CONFIG_KVM_S390_UCONTROL | |
201 | if (type & ~KVM_VM_S390_UCONTROL) | |
202 | goto out_err; | |
203 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
204 | goto out_err; | |
205 | #else | |
206 | if (type) | |
207 | goto out_err; | |
208 | #endif | |
209 | ||
b0c632db HC |
210 | rc = s390_enable_sie(); |
211 | if (rc) | |
d89f5eff | 212 | goto out_err; |
b0c632db | 213 | |
b290411a CO |
214 | rc = -ENOMEM; |
215 | ||
b0c632db HC |
216 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
217 | if (!kvm->arch.sca) | |
d89f5eff | 218 | goto out_err; |
b0c632db HC |
219 | |
220 | sprintf(debug_name, "kvm-%u", current->pid); | |
221 | ||
222 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
223 | if (!kvm->arch.dbf) | |
224 | goto out_nodbf; | |
225 | ||
ba5c1e9b CO |
226 | spin_lock_init(&kvm->arch.float_int.lock); |
227 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
228 | ||
b0c632db HC |
229 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
230 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
231 | ||
e08b9637 CO |
232 | if (type & KVM_VM_S390_UCONTROL) { |
233 | kvm->arch.gmap = NULL; | |
234 | } else { | |
235 | kvm->arch.gmap = gmap_alloc(current->mm); | |
236 | if (!kvm->arch.gmap) | |
237 | goto out_nogmap; | |
238 | } | |
fa6b7fe9 CH |
239 | |
240 | kvm->arch.css_support = 0; | |
241 | ||
d89f5eff | 242 | return 0; |
598841ca CO |
243 | out_nogmap: |
244 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
245 | out_nodbf: |
246 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
247 | out_err: |
248 | return rc; | |
b0c632db HC |
249 | } |
250 | ||
d329c035 CB |
251 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
252 | { | |
253 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 254 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
58f9460b CO |
255 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
256 | clear_bit(63 - vcpu->vcpu_id, | |
257 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
258 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
259 | (__u64) vcpu->arch.sie_block) | |
260 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
261 | } | |
abf4a71e | 262 | smp_mb(); |
27e0393f CO |
263 | |
264 | if (kvm_is_ucontrol(vcpu->kvm)) | |
265 | gmap_free(vcpu->arch.gmap); | |
266 | ||
d329c035 | 267 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 268 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
269 | kfree(vcpu); |
270 | } | |
271 | ||
272 | static void kvm_free_vcpus(struct kvm *kvm) | |
273 | { | |
274 | unsigned int i; | |
988a2cae | 275 | struct kvm_vcpu *vcpu; |
d329c035 | 276 | |
988a2cae GN |
277 | kvm_for_each_vcpu(i, vcpu, kvm) |
278 | kvm_arch_vcpu_destroy(vcpu); | |
279 | ||
280 | mutex_lock(&kvm->lock); | |
281 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
282 | kvm->vcpus[i] = NULL; | |
283 | ||
284 | atomic_set(&kvm->online_vcpus, 0); | |
285 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
286 | } |
287 | ||
ad8ba2cd SY |
288 | void kvm_arch_sync_events(struct kvm *kvm) |
289 | { | |
290 | } | |
291 | ||
b0c632db HC |
292 | void kvm_arch_destroy_vm(struct kvm *kvm) |
293 | { | |
d329c035 | 294 | kvm_free_vcpus(kvm); |
b0c632db | 295 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 296 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
297 | if (!kvm_is_ucontrol(kvm)) |
298 | gmap_free(kvm->arch.gmap); | |
b0c632db HC |
299 | } |
300 | ||
301 | /* Section: vcpu related */ | |
302 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
303 | { | |
27e0393f CO |
304 | if (kvm_is_ucontrol(vcpu->kvm)) { |
305 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
306 | if (!vcpu->arch.gmap) | |
307 | return -ENOMEM; | |
308 | return 0; | |
309 | } | |
310 | ||
598841ca | 311 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
312 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
313 | KVM_SYNC_GPRS | | |
9eed0735 CB |
314 | KVM_SYNC_ACRS | |
315 | KVM_SYNC_CRS; | |
b0c632db HC |
316 | return 0; |
317 | } | |
318 | ||
319 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
320 | { | |
6692cef3 | 321 | /* Nothing todo */ |
b0c632db HC |
322 | } |
323 | ||
324 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
325 | { | |
326 | save_fp_regs(&vcpu->arch.host_fpregs); | |
327 | save_access_regs(vcpu->arch.host_acrs); | |
328 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
329 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
59674c1a | 330 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 331 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 332 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
333 | } |
334 | ||
335 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
336 | { | |
9e6dabef | 337 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 338 | gmap_disable(vcpu->arch.gmap); |
b0c632db | 339 | save_fp_regs(&vcpu->arch.guest_fpregs); |
59674c1a | 340 | save_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
341 | restore_fp_regs(&vcpu->arch.host_fpregs); |
342 | restore_access_regs(vcpu->arch.host_acrs); | |
343 | } | |
344 | ||
345 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
346 | { | |
347 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
348 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
349 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 350 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
351 | vcpu->arch.sie_block->cputm = 0UL; |
352 | vcpu->arch.sie_block->ckc = 0UL; | |
353 | vcpu->arch.sie_block->todpr = 0; | |
354 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
355 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
356 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
357 | vcpu->arch.guest_fpregs.fpc = 0; | |
358 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
359 | vcpu->arch.sie_block->gbea = 1; | |
61bde82c | 360 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
361 | } |
362 | ||
42897d86 MT |
363 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
364 | { | |
365 | return 0; | |
366 | } | |
367 | ||
b0c632db HC |
368 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
369 | { | |
9e6dabef CH |
370 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
371 | CPUSTAT_SM | | |
372 | CPUSTAT_STOPPED); | |
fc34531d | 373 | vcpu->arch.sie_block->ecb = 6; |
b0c632db | 374 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 375 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
376 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
377 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
378 | (unsigned long) vcpu); | |
379 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 380 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 381 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
382 | return 0; |
383 | } | |
384 | ||
385 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
386 | unsigned int id) | |
387 | { | |
4d47555a CO |
388 | struct kvm_vcpu *vcpu; |
389 | int rc = -EINVAL; | |
390 | ||
391 | if (id >= KVM_MAX_VCPUS) | |
392 | goto out; | |
393 | ||
394 | rc = -ENOMEM; | |
b0c632db | 395 | |
4d47555a | 396 | vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
b0c632db | 397 | if (!vcpu) |
4d47555a | 398 | goto out; |
b0c632db | 399 | |
180c12fb CB |
400 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
401 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
402 | |
403 | if (!vcpu->arch.sie_block) | |
404 | goto out_free_cpu; | |
405 | ||
406 | vcpu->arch.sie_block->icpua = id; | |
58f9460b CO |
407 | if (!kvm_is_ucontrol(kvm)) { |
408 | if (!kvm->arch.sca) { | |
409 | WARN_ON_ONCE(1); | |
410 | goto out_free_cpu; | |
411 | } | |
412 | if (!kvm->arch.sca->cpu[id].sda) | |
413 | kvm->arch.sca->cpu[id].sda = | |
414 | (__u64) vcpu->arch.sie_block; | |
415 | vcpu->arch.sie_block->scaoh = | |
416 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
417 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
418 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
419 | } | |
b0c632db | 420 | |
ba5c1e9b CO |
421 | spin_lock_init(&vcpu->arch.local_int.lock); |
422 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
423 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 424 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
425 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
426 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 427 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 428 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 429 | |
b0c632db HC |
430 | rc = kvm_vcpu_init(vcpu, kvm, id); |
431 | if (rc) | |
7b06bf2f | 432 | goto out_free_sie_block; |
b0c632db HC |
433 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
434 | vcpu->arch.sie_block); | |
ade38c31 | 435 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 436 | |
b0c632db | 437 | return vcpu; |
7b06bf2f WY |
438 | out_free_sie_block: |
439 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db HC |
440 | out_free_cpu: |
441 | kfree(vcpu); | |
4d47555a | 442 | out: |
b0c632db HC |
443 | return ERR_PTR(rc); |
444 | } | |
445 | ||
b0c632db HC |
446 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
447 | { | |
448 | /* kvm common code refers to this, but never calls it */ | |
449 | BUG(); | |
450 | return 0; | |
451 | } | |
452 | ||
b6d33834 CD |
453 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
454 | { | |
455 | /* kvm common code refers to this, but never calls it */ | |
456 | BUG(); | |
457 | return 0; | |
458 | } | |
459 | ||
14eebd91 CO |
460 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
461 | struct kvm_one_reg *reg) | |
462 | { | |
463 | int r = -EINVAL; | |
464 | ||
465 | switch (reg->id) { | |
29b7c71b CO |
466 | case KVM_REG_S390_TODPR: |
467 | r = put_user(vcpu->arch.sie_block->todpr, | |
468 | (u32 __user *)reg->addr); | |
469 | break; | |
470 | case KVM_REG_S390_EPOCHDIFF: | |
471 | r = put_user(vcpu->arch.sie_block->epoch, | |
472 | (u64 __user *)reg->addr); | |
473 | break; | |
46a6dd1c J |
474 | case KVM_REG_S390_CPU_TIMER: |
475 | r = put_user(vcpu->arch.sie_block->cputm, | |
476 | (u64 __user *)reg->addr); | |
477 | break; | |
478 | case KVM_REG_S390_CLOCK_COMP: | |
479 | r = put_user(vcpu->arch.sie_block->ckc, | |
480 | (u64 __user *)reg->addr); | |
481 | break; | |
14eebd91 CO |
482 | default: |
483 | break; | |
484 | } | |
485 | ||
486 | return r; | |
487 | } | |
488 | ||
489 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
490 | struct kvm_one_reg *reg) | |
491 | { | |
492 | int r = -EINVAL; | |
493 | ||
494 | switch (reg->id) { | |
29b7c71b CO |
495 | case KVM_REG_S390_TODPR: |
496 | r = get_user(vcpu->arch.sie_block->todpr, | |
497 | (u32 __user *)reg->addr); | |
498 | break; | |
499 | case KVM_REG_S390_EPOCHDIFF: | |
500 | r = get_user(vcpu->arch.sie_block->epoch, | |
501 | (u64 __user *)reg->addr); | |
502 | break; | |
46a6dd1c J |
503 | case KVM_REG_S390_CPU_TIMER: |
504 | r = get_user(vcpu->arch.sie_block->cputm, | |
505 | (u64 __user *)reg->addr); | |
506 | break; | |
507 | case KVM_REG_S390_CLOCK_COMP: | |
508 | r = get_user(vcpu->arch.sie_block->ckc, | |
509 | (u64 __user *)reg->addr); | |
510 | break; | |
14eebd91 CO |
511 | default: |
512 | break; | |
513 | } | |
514 | ||
515 | return r; | |
516 | } | |
b6d33834 | 517 | |
b0c632db HC |
518 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
519 | { | |
b0c632db | 520 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
521 | return 0; |
522 | } | |
523 | ||
524 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
525 | { | |
5a32c1af | 526 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
527 | return 0; |
528 | } | |
529 | ||
530 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
531 | { | |
5a32c1af | 532 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
533 | return 0; |
534 | } | |
535 | ||
536 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
537 | struct kvm_sregs *sregs) | |
538 | { | |
59674c1a | 539 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 540 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 541 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
542 | return 0; |
543 | } | |
544 | ||
545 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
546 | struct kvm_sregs *sregs) | |
547 | { | |
59674c1a | 548 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 549 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
550 | return 0; |
551 | } | |
552 | ||
553 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
554 | { | |
b0c632db | 555 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
85175587 | 556 | vcpu->arch.guest_fpregs.fpc = fpu->fpc & FPC_VALID_MASK; |
7eef87dc | 557 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
b0c632db HC |
558 | return 0; |
559 | } | |
560 | ||
561 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
562 | { | |
b0c632db HC |
563 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
564 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
565 | return 0; |
566 | } | |
567 | ||
568 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
569 | { | |
570 | int rc = 0; | |
571 | ||
9e6dabef | 572 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 573 | rc = -EBUSY; |
d7b0b5eb CO |
574 | else { |
575 | vcpu->run->psw_mask = psw.mask; | |
576 | vcpu->run->psw_addr = psw.addr; | |
577 | } | |
b0c632db HC |
578 | return rc; |
579 | } | |
580 | ||
581 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
582 | struct kvm_translation *tr) | |
583 | { | |
584 | return -EINVAL; /* not implemented yet */ | |
585 | } | |
586 | ||
d0bfb940 JK |
587 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
588 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
589 | { |
590 | return -EINVAL; /* not implemented yet */ | |
591 | } | |
592 | ||
62d9f0db MT |
593 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
594 | struct kvm_mp_state *mp_state) | |
595 | { | |
596 | return -EINVAL; /* not implemented yet */ | |
597 | } | |
598 | ||
599 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
600 | struct kvm_mp_state *mp_state) | |
601 | { | |
602 | return -EINVAL; /* not implemented yet */ | |
603 | } | |
604 | ||
e168bf8d | 605 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
b0c632db | 606 | { |
e168bf8d CO |
607 | int rc; |
608 | ||
5a32c1af | 609 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
610 | |
611 | if (need_resched()) | |
612 | schedule(); | |
613 | ||
71cde587 CB |
614 | if (test_thread_flag(TIF_MCCK_PENDING)) |
615 | s390_handle_mcck(); | |
616 | ||
d6b6d166 CO |
617 | if (!kvm_is_ucontrol(vcpu->kvm)) |
618 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 619 | |
b0c632db | 620 | vcpu->arch.sie_block->icptcode = 0; |
83987ace | 621 | preempt_disable(); |
b0c632db | 622 | kvm_guest_enter(); |
83987ace | 623 | preempt_enable(); |
b0c632db HC |
624 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", |
625 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
5786fffa CH |
626 | trace_kvm_s390_sie_enter(vcpu, |
627 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
5a32c1af | 628 | rc = sie64a(vcpu->arch.sie_block, vcpu->run->s.regs.gprs); |
e168bf8d CO |
629 | if (rc) { |
630 | if (kvm_is_ucontrol(vcpu->kvm)) { | |
631 | rc = SIE_INTERCEPT_UCONTROL; | |
632 | } else { | |
633 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
5786fffa | 634 | trace_kvm_s390_sie_fault(vcpu); |
e168bf8d CO |
635 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); |
636 | rc = 0; | |
637 | } | |
1f0d0f09 | 638 | } |
b0c632db HC |
639 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
640 | vcpu->arch.sie_block->icptcode); | |
5786fffa | 641 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); |
b0c632db | 642 | kvm_guest_exit(); |
b0c632db | 643 | |
5a32c1af | 644 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
e168bf8d | 645 | return rc; |
b0c632db HC |
646 | } |
647 | ||
648 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
649 | { | |
8f2abe6a | 650 | int rc; |
b0c632db HC |
651 | sigset_t sigsaved; |
652 | ||
9ace903d | 653 | rerun_vcpu: |
b0c632db HC |
654 | if (vcpu->sigset_active) |
655 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
656 | ||
9e6dabef | 657 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 658 | |
ba5c1e9b CO |
659 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
660 | ||
8f2abe6a CB |
661 | switch (kvm_run->exit_reason) { |
662 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 663 | case KVM_EXIT_UNKNOWN: |
9ace903d | 664 | case KVM_EXIT_INTR: |
8f2abe6a | 665 | case KVM_EXIT_S390_RESET: |
e168bf8d | 666 | case KVM_EXIT_S390_UCONTROL: |
fa6b7fe9 | 667 | case KVM_EXIT_S390_TSCH: |
8f2abe6a CB |
668 | break; |
669 | default: | |
670 | BUG(); | |
671 | } | |
672 | ||
d7b0b5eb CO |
673 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
674 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
60b413c9 CB |
675 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
676 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; | |
677 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
678 | } | |
9eed0735 CB |
679 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
680 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; | |
681 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
682 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
683 | } | |
d7b0b5eb | 684 | |
dab4079d | 685 | might_fault(); |
8f2abe6a CB |
686 | |
687 | do { | |
e168bf8d CO |
688 | rc = __vcpu_run(vcpu); |
689 | if (rc) | |
690 | break; | |
c0d744a9 CO |
691 | if (kvm_is_ucontrol(vcpu->kvm)) |
692 | rc = -EOPNOTSUPP; | |
693 | else | |
694 | rc = kvm_handle_sie_intercept(vcpu); | |
8f2abe6a CB |
695 | } while (!signal_pending(current) && !rc); |
696 | ||
9ace903d CE |
697 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
698 | goto rerun_vcpu; | |
699 | ||
b1d16c49 CE |
700 | if (signal_pending(current) && !rc) { |
701 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 702 | rc = -EINTR; |
b1d16c49 | 703 | } |
8f2abe6a | 704 | |
e168bf8d CO |
705 | #ifdef CONFIG_KVM_S390_UCONTROL |
706 | if (rc == SIE_INTERCEPT_UCONTROL) { | |
707 | kvm_run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
708 | kvm_run->s390_ucontrol.trans_exc_code = | |
709 | current->thread.gmap_addr; | |
710 | kvm_run->s390_ucontrol.pgm_code = 0x10; | |
711 | rc = 0; | |
712 | } | |
713 | #endif | |
714 | ||
b8e660b8 | 715 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
716 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
717 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
718 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
719 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
720 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
721 | rc = 0; | |
722 | } | |
723 | ||
724 | if (rc == -EREMOTE) { | |
725 | /* intercept was handled, but userspace support is needed | |
726 | * kvm_run has been prepared by the handler */ | |
727 | rc = 0; | |
728 | } | |
b0c632db | 729 | |
d7b0b5eb CO |
730 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
731 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
60b413c9 | 732 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
9eed0735 | 733 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
d7b0b5eb | 734 | |
b0c632db HC |
735 | if (vcpu->sigset_active) |
736 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
737 | ||
b0c632db | 738 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 739 | return rc; |
b0c632db HC |
740 | } |
741 | ||
092670cd | 742 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
743 | unsigned long n, int prefix) |
744 | { | |
745 | if (prefix) | |
746 | return copy_to_guest(vcpu, guestdest, from, n); | |
747 | else | |
748 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
749 | } | |
750 | ||
751 | /* | |
752 | * store status at address | |
753 | * we use have two special cases: | |
754 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
755 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
756 | */ | |
971eb77f | 757 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 758 | { |
092670cd | 759 | unsigned char archmode = 1; |
b0c632db HC |
760 | int prefix; |
761 | ||
762 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
763 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
764 | return -EFAULT; | |
765 | addr = SAVE_AREA_BASE; | |
766 | prefix = 0; | |
767 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
768 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
769 | return -EFAULT; | |
770 | addr = SAVE_AREA_BASE; | |
771 | prefix = 1; | |
772 | } else | |
773 | prefix = 0; | |
774 | ||
15bc8d84 CB |
775 | /* |
776 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
777 | * copying in vcpu load/put. Lets update our copies before we save | |
778 | * it into the save area | |
779 | */ | |
780 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
781 | save_access_regs(vcpu->run->s.regs.acrs); | |
782 | ||
f64ca217 | 783 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
784 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
785 | return -EFAULT; | |
786 | ||
f64ca217 | 787 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
5a32c1af | 788 | vcpu->run->s.regs.gprs, 128, prefix)) |
b0c632db HC |
789 | return -EFAULT; |
790 | ||
f64ca217 | 791 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
792 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
793 | return -EFAULT; | |
794 | ||
f64ca217 | 795 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
796 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
797 | return -EFAULT; | |
798 | ||
799 | if (__guestcopy(vcpu, | |
f64ca217 | 800 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
801 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
802 | return -EFAULT; | |
803 | ||
f64ca217 | 804 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
805 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
806 | return -EFAULT; | |
807 | ||
f64ca217 | 808 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
809 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
810 | return -EFAULT; | |
811 | ||
f64ca217 | 812 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
813 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
814 | return -EFAULT; | |
815 | ||
f64ca217 | 816 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
59674c1a | 817 | &vcpu->run->s.regs.acrs, 64, prefix)) |
b0c632db HC |
818 | return -EFAULT; |
819 | ||
820 | if (__guestcopy(vcpu, | |
f64ca217 | 821 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
822 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
823 | return -EFAULT; | |
824 | return 0; | |
825 | } | |
826 | ||
d6712df9 CH |
827 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
828 | struct kvm_enable_cap *cap) | |
829 | { | |
830 | int r; | |
831 | ||
832 | if (cap->flags) | |
833 | return -EINVAL; | |
834 | ||
835 | switch (cap->cap) { | |
fa6b7fe9 CH |
836 | case KVM_CAP_S390_CSS_SUPPORT: |
837 | if (!vcpu->kvm->arch.css_support) { | |
838 | vcpu->kvm->arch.css_support = 1; | |
839 | trace_kvm_s390_enable_css(vcpu->kvm); | |
840 | } | |
841 | r = 0; | |
842 | break; | |
d6712df9 CH |
843 | default: |
844 | r = -EINVAL; | |
845 | break; | |
846 | } | |
847 | return r; | |
848 | } | |
849 | ||
b0c632db HC |
850 | long kvm_arch_vcpu_ioctl(struct file *filp, |
851 | unsigned int ioctl, unsigned long arg) | |
852 | { | |
853 | struct kvm_vcpu *vcpu = filp->private_data; | |
854 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 855 | long r; |
b0c632db | 856 | |
93736624 AK |
857 | switch (ioctl) { |
858 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
859 | struct kvm_s390_interrupt s390int; |
860 | ||
93736624 | 861 | r = -EFAULT; |
ba5c1e9b | 862 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
863 | break; |
864 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
865 | break; | |
ba5c1e9b | 866 | } |
b0c632db | 867 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
868 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
869 | break; | |
b0c632db HC |
870 | case KVM_S390_SET_INITIAL_PSW: { |
871 | psw_t psw; | |
872 | ||
bc923cc9 | 873 | r = -EFAULT; |
b0c632db | 874 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
875 | break; |
876 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
877 | break; | |
b0c632db HC |
878 | } |
879 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
880 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
881 | break; | |
14eebd91 CO |
882 | case KVM_SET_ONE_REG: |
883 | case KVM_GET_ONE_REG: { | |
884 | struct kvm_one_reg reg; | |
885 | r = -EFAULT; | |
886 | if (copy_from_user(®, argp, sizeof(reg))) | |
887 | break; | |
888 | if (ioctl == KVM_SET_ONE_REG) | |
889 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
890 | else | |
891 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
892 | break; | |
893 | } | |
27e0393f CO |
894 | #ifdef CONFIG_KVM_S390_UCONTROL |
895 | case KVM_S390_UCAS_MAP: { | |
896 | struct kvm_s390_ucas_mapping ucasmap; | |
897 | ||
898 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
899 | r = -EFAULT; | |
900 | break; | |
901 | } | |
902 | ||
903 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
904 | r = -EINVAL; | |
905 | break; | |
906 | } | |
907 | ||
908 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
909 | ucasmap.vcpu_addr, ucasmap.length); | |
910 | break; | |
911 | } | |
912 | case KVM_S390_UCAS_UNMAP: { | |
913 | struct kvm_s390_ucas_mapping ucasmap; | |
914 | ||
915 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
916 | r = -EFAULT; | |
917 | break; | |
918 | } | |
919 | ||
920 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
921 | r = -EINVAL; | |
922 | break; | |
923 | } | |
924 | ||
925 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
926 | ucasmap.length); | |
927 | break; | |
928 | } | |
929 | #endif | |
ccc7910f CO |
930 | case KVM_S390_VCPU_FAULT: { |
931 | r = gmap_fault(arg, vcpu->arch.gmap); | |
932 | if (!IS_ERR_VALUE(r)) | |
933 | r = 0; | |
934 | break; | |
935 | } | |
d6712df9 CH |
936 | case KVM_ENABLE_CAP: |
937 | { | |
938 | struct kvm_enable_cap cap; | |
939 | r = -EFAULT; | |
940 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
941 | break; | |
942 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
943 | break; | |
944 | } | |
b0c632db | 945 | default: |
3e6afcf1 | 946 | r = -ENOTTY; |
b0c632db | 947 | } |
bc923cc9 | 948 | return r; |
b0c632db HC |
949 | } |
950 | ||
5b1c1493 CO |
951 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
952 | { | |
953 | #ifdef CONFIG_KVM_S390_UCONTROL | |
954 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
955 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
956 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
957 | get_page(vmf->page); | |
958 | return 0; | |
959 | } | |
960 | #endif | |
961 | return VM_FAULT_SIGBUS; | |
962 | } | |
963 | ||
db3fe4eb TY |
964 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, |
965 | struct kvm_memory_slot *dont) | |
966 | { | |
967 | } | |
968 | ||
969 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) | |
970 | { | |
971 | return 0; | |
972 | } | |
973 | ||
b0c632db | 974 | /* Section: memory related */ |
f7784b8e MT |
975 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
976 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
977 | struct kvm_userspace_memory_region *mem, |
978 | enum kvm_mr_change change) | |
b0c632db HC |
979 | { |
980 | /* A few sanity checks. We can have exactly one memory slot which has | |
981 | to start at guest virtual zero and which has to be located at a | |
982 | page boundary in userland and which has to end at a page boundary. | |
983 | The memory in userland is ok to be fragmented into various different | |
984 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
985 | doing this call at any time */ | |
986 | ||
628eb9b8 | 987 | if (mem->slot) |
b0c632db HC |
988 | return -EINVAL; |
989 | ||
990 | if (mem->guest_phys_addr) | |
991 | return -EINVAL; | |
992 | ||
598841ca | 993 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
994 | return -EINVAL; |
995 | ||
598841ca | 996 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
997 | return -EINVAL; |
998 | ||
f7784b8e MT |
999 | return 0; |
1000 | } | |
1001 | ||
1002 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
1003 | struct kvm_userspace_memory_region *mem, | |
462fce46 | 1004 | struct kvm_memory_slot old) |
f7784b8e | 1005 | { |
f7850c92 | 1006 | int rc; |
f7784b8e | 1007 | |
598841ca CO |
1008 | |
1009 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
1010 | mem->guest_phys_addr, mem->memory_size); | |
1011 | if (rc) | |
f7850c92 | 1012 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 1013 | return; |
b0c632db HC |
1014 | } |
1015 | ||
2df72e9b MT |
1016 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
1017 | { | |
1018 | } | |
1019 | ||
1020 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, | |
1021 | struct kvm_memory_slot *slot) | |
34d4cb8f MT |
1022 | { |
1023 | } | |
1024 | ||
b0c632db HC |
1025 | static int __init kvm_s390_init(void) |
1026 | { | |
ef50f7ac | 1027 | int ret; |
0ee75bea | 1028 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
1029 | if (ret) |
1030 | return ret; | |
1031 | ||
1032 | /* | |
1033 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 1034 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
1035 | * only set facilities that are known to work in KVM. |
1036 | */ | |
c2f0e8c8 | 1037 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
1038 | if (!facilities) { |
1039 | kvm_exit(); | |
1040 | return -ENOMEM; | |
1041 | } | |
14375bc4 | 1042 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
6d00d00b | 1043 | facilities[0] &= 0xff00fff3f47c0000ULL; |
87cac8f8 | 1044 | facilities[1] &= 0x001c000000000000ULL; |
ef50f7ac | 1045 | return 0; |
b0c632db HC |
1046 | } |
1047 | ||
1048 | static void __exit kvm_s390_exit(void) | |
1049 | { | |
ef50f7ac | 1050 | free_page((unsigned long) facilities); |
b0c632db HC |
1051 | kvm_exit(); |
1052 | } | |
1053 | ||
1054 | module_init(kvm_s390_init); | |
1055 | module_exit(kvm_s390_exit); |