Commit | Line | Data |
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b0c632db HC |
1 | /* |
2 | * s390host.c -- hosting zSeries kernel virtual machines | |
3 | * | |
628eb9b8 | 4 | * Copyright IBM Corp. 2008,2009 |
b0c632db HC |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
b0c632db HC |
14 | */ |
15 | ||
16 | #include <linux/compiler.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/fs.h> | |
ca872302 | 19 | #include <linux/hrtimer.h> |
b0c632db HC |
20 | #include <linux/init.h> |
21 | #include <linux/kvm.h> | |
22 | #include <linux/kvm_host.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/slab.h> | |
ba5c1e9b | 25 | #include <linux/timer.h> |
cbb870c8 | 26 | #include <asm/asm-offsets.h> |
b0c632db HC |
27 | #include <asm/lowcore.h> |
28 | #include <asm/pgtable.h> | |
f5daba1d | 29 | #include <asm/nmi.h> |
ef50f7ac | 30 | #include <asm/system.h> |
8f2abe6a | 31 | #include "kvm-s390.h" |
b0c632db HC |
32 | #include "gaccess.h" |
33 | ||
34 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
35 | ||
36 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
37 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 38 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
39 | { "exit_validity", VCPU_STAT(exit_validity) }, |
40 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
41 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
42 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
43 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
44 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
45 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f5e10b09 | 46 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b CO |
47 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
48 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, | |
49 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, | |
50 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
51 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
52 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
53 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
54 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
55 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
453423dc CB |
56 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
57 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
58 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
59 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
60 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
61 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
62 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
63 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
64 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 65 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 CB |
66 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
67 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, | |
68 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
69 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
70 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
71 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
e28acfea | 72 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
b0c632db HC |
73 | { NULL } |
74 | }; | |
75 | ||
ef50f7ac | 76 | static unsigned long long *facilities; |
b0c632db HC |
77 | |
78 | /* Section: not file related */ | |
10474ae8 | 79 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
80 | { |
81 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 82 | return 0; |
b0c632db HC |
83 | } |
84 | ||
85 | void kvm_arch_hardware_disable(void *garbage) | |
86 | { | |
87 | } | |
88 | ||
b0c632db HC |
89 | int kvm_arch_hardware_setup(void) |
90 | { | |
91 | return 0; | |
92 | } | |
93 | ||
94 | void kvm_arch_hardware_unsetup(void) | |
95 | { | |
96 | } | |
97 | ||
98 | void kvm_arch_check_processor_compat(void *rtn) | |
99 | { | |
100 | } | |
101 | ||
102 | int kvm_arch_init(void *opaque) | |
103 | { | |
104 | return 0; | |
105 | } | |
106 | ||
107 | void kvm_arch_exit(void) | |
108 | { | |
109 | } | |
110 | ||
111 | /* Section: device related */ | |
112 | long kvm_arch_dev_ioctl(struct file *filp, | |
113 | unsigned int ioctl, unsigned long arg) | |
114 | { | |
115 | if (ioctl == KVM_S390_ENABLE_SIE) | |
116 | return s390_enable_sie(); | |
117 | return -EINVAL; | |
118 | } | |
119 | ||
120 | int kvm_dev_ioctl_check_extension(long ext) | |
121 | { | |
d7b0b5eb CO |
122 | int r; |
123 | ||
2bd0ac4e | 124 | switch (ext) { |
d7b0b5eb | 125 | case KVM_CAP_S390_PSW: |
b6cf8788 | 126 | case KVM_CAP_S390_GMAP: |
d7b0b5eb CO |
127 | r = 1; |
128 | break; | |
2bd0ac4e | 129 | default: |
d7b0b5eb | 130 | r = 0; |
2bd0ac4e | 131 | } |
d7b0b5eb | 132 | return r; |
b0c632db HC |
133 | } |
134 | ||
135 | /* Section: vm related */ | |
136 | /* | |
137 | * Get (and clear) the dirty memory log for a memory slot. | |
138 | */ | |
139 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
140 | struct kvm_dirty_log *log) | |
141 | { | |
142 | return 0; | |
143 | } | |
144 | ||
145 | long kvm_arch_vm_ioctl(struct file *filp, | |
146 | unsigned int ioctl, unsigned long arg) | |
147 | { | |
148 | struct kvm *kvm = filp->private_data; | |
149 | void __user *argp = (void __user *)arg; | |
150 | int r; | |
151 | ||
152 | switch (ioctl) { | |
ba5c1e9b CO |
153 | case KVM_S390_INTERRUPT: { |
154 | struct kvm_s390_interrupt s390int; | |
155 | ||
156 | r = -EFAULT; | |
157 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
158 | break; | |
159 | r = kvm_s390_inject_vm(kvm, &s390int); | |
160 | break; | |
161 | } | |
b0c632db | 162 | default: |
367e1319 | 163 | r = -ENOTTY; |
b0c632db HC |
164 | } |
165 | ||
166 | return r; | |
167 | } | |
168 | ||
d89f5eff | 169 | int kvm_arch_init_vm(struct kvm *kvm) |
b0c632db | 170 | { |
b0c632db HC |
171 | int rc; |
172 | char debug_name[16]; | |
173 | ||
174 | rc = s390_enable_sie(); | |
175 | if (rc) | |
d89f5eff | 176 | goto out_err; |
b0c632db HC |
177 | |
178 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); | |
179 | if (!kvm->arch.sca) | |
d89f5eff | 180 | goto out_err; |
b0c632db HC |
181 | |
182 | sprintf(debug_name, "kvm-%u", current->pid); | |
183 | ||
184 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
185 | if (!kvm->arch.dbf) | |
186 | goto out_nodbf; | |
187 | ||
ba5c1e9b CO |
188 | spin_lock_init(&kvm->arch.float_int.lock); |
189 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
190 | ||
b0c632db HC |
191 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
192 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
193 | ||
598841ca CO |
194 | kvm->arch.gmap = gmap_alloc(current->mm); |
195 | if (!kvm->arch.gmap) | |
196 | goto out_nogmap; | |
197 | ||
d89f5eff | 198 | return 0; |
598841ca CO |
199 | out_nogmap: |
200 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
201 | out_nodbf: |
202 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
203 | out_err: |
204 | return rc; | |
b0c632db HC |
205 | } |
206 | ||
d329c035 CB |
207 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
208 | { | |
209 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
fc34531d | 210 | clear_bit(63 - vcpu->vcpu_id, (unsigned long *) &vcpu->kvm->arch.sca->mcn); |
abf4a71e CO |
211 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
212 | (__u64) vcpu->arch.sie_block) | |
213 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
214 | smp_mb(); | |
d329c035 | 215 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 216 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
217 | kfree(vcpu); |
218 | } | |
219 | ||
220 | static void kvm_free_vcpus(struct kvm *kvm) | |
221 | { | |
222 | unsigned int i; | |
988a2cae | 223 | struct kvm_vcpu *vcpu; |
d329c035 | 224 | |
988a2cae GN |
225 | kvm_for_each_vcpu(i, vcpu, kvm) |
226 | kvm_arch_vcpu_destroy(vcpu); | |
227 | ||
228 | mutex_lock(&kvm->lock); | |
229 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
230 | kvm->vcpus[i] = NULL; | |
231 | ||
232 | atomic_set(&kvm->online_vcpus, 0); | |
233 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
234 | } |
235 | ||
ad8ba2cd SY |
236 | void kvm_arch_sync_events(struct kvm *kvm) |
237 | { | |
238 | } | |
239 | ||
b0c632db HC |
240 | void kvm_arch_destroy_vm(struct kvm *kvm) |
241 | { | |
d329c035 | 242 | kvm_free_vcpus(kvm); |
b0c632db | 243 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 244 | debug_unregister(kvm->arch.dbf); |
598841ca | 245 | gmap_free(kvm->arch.gmap); |
b0c632db HC |
246 | } |
247 | ||
248 | /* Section: vcpu related */ | |
249 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
250 | { | |
598841ca | 251 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
b0c632db HC |
252 | return 0; |
253 | } | |
254 | ||
255 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
256 | { | |
6692cef3 | 257 | /* Nothing todo */ |
b0c632db HC |
258 | } |
259 | ||
260 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
261 | { | |
262 | save_fp_regs(&vcpu->arch.host_fpregs); | |
263 | save_access_regs(vcpu->arch.host_acrs); | |
264 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
265 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
266 | restore_access_regs(vcpu->arch.guest_acrs); | |
480e5926 | 267 | gmap_enable(vcpu->arch.gmap); |
b0c632db HC |
268 | } |
269 | ||
270 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
271 | { | |
480e5926 | 272 | gmap_disable(vcpu->arch.gmap); |
b0c632db HC |
273 | save_fp_regs(&vcpu->arch.guest_fpregs); |
274 | save_access_regs(vcpu->arch.guest_acrs); | |
275 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
276 | restore_access_regs(vcpu->arch.host_acrs); | |
277 | } | |
278 | ||
279 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
280 | { | |
281 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
282 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
283 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
284 | vcpu->arch.sie_block->prefix = 0UL; | |
285 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
286 | vcpu->arch.sie_block->cputm = 0UL; | |
287 | vcpu->arch.sie_block->ckc = 0UL; | |
288 | vcpu->arch.sie_block->todpr = 0; | |
289 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
290 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
291 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
292 | vcpu->arch.guest_fpregs.fpc = 0; | |
293 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
294 | vcpu->arch.sie_block->gbea = 1; | |
295 | } | |
296 | ||
297 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
298 | { | |
598841ca | 299 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | CPUSTAT_SM); |
fc34531d | 300 | vcpu->arch.sie_block->ecb = 6; |
b0c632db | 301 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 302 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
303 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
304 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
305 | (unsigned long) vcpu); | |
306 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 307 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 308 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
309 | return 0; |
310 | } | |
311 | ||
312 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
313 | unsigned int id) | |
314 | { | |
315 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
316 | int rc = -ENOMEM; | |
317 | ||
318 | if (!vcpu) | |
319 | goto out_nomem; | |
320 | ||
180c12fb CB |
321 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
322 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
323 | |
324 | if (!vcpu->arch.sie_block) | |
325 | goto out_free_cpu; | |
326 | ||
327 | vcpu->arch.sie_block->icpua = id; | |
328 | BUG_ON(!kvm->arch.sca); | |
abf4a71e CO |
329 | if (!kvm->arch.sca->cpu[id].sda) |
330 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
b0c632db HC |
331 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
332 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
fc34531d | 333 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); |
b0c632db | 334 | |
ba5c1e9b CO |
335 | spin_lock_init(&vcpu->arch.local_int.lock); |
336 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
337 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 338 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
339 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
340 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 341 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 342 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 343 | |
b0c632db HC |
344 | rc = kvm_vcpu_init(vcpu, kvm, id); |
345 | if (rc) | |
7b06bf2f | 346 | goto out_free_sie_block; |
b0c632db HC |
347 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
348 | vcpu->arch.sie_block); | |
349 | ||
b0c632db | 350 | return vcpu; |
7b06bf2f WY |
351 | out_free_sie_block: |
352 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db HC |
353 | out_free_cpu: |
354 | kfree(vcpu); | |
355 | out_nomem: | |
356 | return ERR_PTR(rc); | |
357 | } | |
358 | ||
b0c632db HC |
359 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
360 | { | |
361 | /* kvm common code refers to this, but never calls it */ | |
362 | BUG(); | |
363 | return 0; | |
364 | } | |
365 | ||
366 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
367 | { | |
b0c632db | 368 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
369 | return 0; |
370 | } | |
371 | ||
372 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
373 | { | |
b0c632db | 374 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
375 | return 0; |
376 | } | |
377 | ||
378 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
379 | { | |
b0c632db | 380 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); |
b0c632db HC |
381 | return 0; |
382 | } | |
383 | ||
384 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
385 | struct kvm_sregs *sregs) | |
386 | { | |
b0c632db HC |
387 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); |
388 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
b0c632db HC |
389 | return 0; |
390 | } | |
391 | ||
392 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
393 | struct kvm_sregs *sregs) | |
394 | { | |
b0c632db HC |
395 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); |
396 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
b0c632db HC |
397 | return 0; |
398 | } | |
399 | ||
400 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
401 | { | |
b0c632db HC |
402 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
403 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
b0c632db HC |
404 | return 0; |
405 | } | |
406 | ||
407 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
408 | { | |
b0c632db HC |
409 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
410 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
411 | return 0; |
412 | } | |
413 | ||
414 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
415 | { | |
416 | int rc = 0; | |
417 | ||
b0c632db HC |
418 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) |
419 | rc = -EBUSY; | |
d7b0b5eb CO |
420 | else { |
421 | vcpu->run->psw_mask = psw.mask; | |
422 | vcpu->run->psw_addr = psw.addr; | |
423 | } | |
b0c632db HC |
424 | return rc; |
425 | } | |
426 | ||
427 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
428 | struct kvm_translation *tr) | |
429 | { | |
430 | return -EINVAL; /* not implemented yet */ | |
431 | } | |
432 | ||
d0bfb940 JK |
433 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
434 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
435 | { |
436 | return -EINVAL; /* not implemented yet */ | |
437 | } | |
438 | ||
62d9f0db MT |
439 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
440 | struct kvm_mp_state *mp_state) | |
441 | { | |
442 | return -EINVAL; /* not implemented yet */ | |
443 | } | |
444 | ||
445 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
446 | struct kvm_mp_state *mp_state) | |
447 | { | |
448 | return -EINVAL; /* not implemented yet */ | |
449 | } | |
450 | ||
b0c632db HC |
451 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
452 | { | |
453 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
454 | ||
455 | if (need_resched()) | |
456 | schedule(); | |
457 | ||
71cde587 CB |
458 | if (test_thread_flag(TIF_MCCK_PENDING)) |
459 | s390_handle_mcck(); | |
460 | ||
0ff31867 CO |
461 | kvm_s390_deliver_pending_interrupts(vcpu); |
462 | ||
b0c632db HC |
463 | vcpu->arch.sie_block->icptcode = 0; |
464 | local_irq_disable(); | |
465 | kvm_guest_enter(); | |
466 | local_irq_enable(); | |
467 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
468 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
1f0d0f09 CO |
469 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
470 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
471 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
472 | } | |
b0c632db HC |
473 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
474 | vcpu->arch.sie_block->icptcode); | |
475 | local_irq_disable(); | |
476 | kvm_guest_exit(); | |
477 | local_irq_enable(); | |
478 | ||
479 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
480 | } | |
481 | ||
482 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
483 | { | |
8f2abe6a | 484 | int rc; |
b0c632db HC |
485 | sigset_t sigsaved; |
486 | ||
9ace903d | 487 | rerun_vcpu: |
b0c632db HC |
488 | if (vcpu->sigset_active) |
489 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
490 | ||
491 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
492 | ||
ba5c1e9b CO |
493 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
494 | ||
8f2abe6a CB |
495 | switch (kvm_run->exit_reason) { |
496 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 497 | case KVM_EXIT_UNKNOWN: |
9ace903d | 498 | case KVM_EXIT_INTR: |
8f2abe6a CB |
499 | case KVM_EXIT_S390_RESET: |
500 | break; | |
501 | default: | |
502 | BUG(); | |
503 | } | |
504 | ||
d7b0b5eb CO |
505 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
506 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
507 | ||
dab4079d | 508 | might_fault(); |
8f2abe6a CB |
509 | |
510 | do { | |
511 | __vcpu_run(vcpu); | |
8f2abe6a CB |
512 | rc = kvm_handle_sie_intercept(vcpu); |
513 | } while (!signal_pending(current) && !rc); | |
514 | ||
9ace903d CE |
515 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
516 | goto rerun_vcpu; | |
517 | ||
b1d16c49 CE |
518 | if (signal_pending(current) && !rc) { |
519 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 520 | rc = -EINTR; |
b1d16c49 | 521 | } |
8f2abe6a | 522 | |
b8e660b8 | 523 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
524 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
525 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
526 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
527 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
528 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
529 | rc = 0; | |
530 | } | |
531 | ||
532 | if (rc == -EREMOTE) { | |
533 | /* intercept was handled, but userspace support is needed | |
534 | * kvm_run has been prepared by the handler */ | |
535 | rc = 0; | |
536 | } | |
b0c632db | 537 | |
d7b0b5eb CO |
538 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
539 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
540 | ||
b0c632db HC |
541 | if (vcpu->sigset_active) |
542 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
543 | ||
b0c632db | 544 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 545 | return rc; |
b0c632db HC |
546 | } |
547 | ||
092670cd | 548 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
549 | unsigned long n, int prefix) |
550 | { | |
551 | if (prefix) | |
552 | return copy_to_guest(vcpu, guestdest, from, n); | |
553 | else | |
554 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
555 | } | |
556 | ||
557 | /* | |
558 | * store status at address | |
559 | * we use have two special cases: | |
560 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
561 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
562 | */ | |
971eb77f | 563 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 564 | { |
092670cd | 565 | unsigned char archmode = 1; |
b0c632db HC |
566 | int prefix; |
567 | ||
568 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
569 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
570 | return -EFAULT; | |
571 | addr = SAVE_AREA_BASE; | |
572 | prefix = 0; | |
573 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
574 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
575 | return -EFAULT; | |
576 | addr = SAVE_AREA_BASE; | |
577 | prefix = 1; | |
578 | } else | |
579 | prefix = 0; | |
580 | ||
f64ca217 | 581 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
582 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
583 | return -EFAULT; | |
584 | ||
f64ca217 | 585 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
b0c632db HC |
586 | vcpu->arch.guest_gprs, 128, prefix)) |
587 | return -EFAULT; | |
588 | ||
f64ca217 | 589 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
590 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
591 | return -EFAULT; | |
592 | ||
f64ca217 | 593 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
594 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
595 | return -EFAULT; | |
596 | ||
597 | if (__guestcopy(vcpu, | |
f64ca217 | 598 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
599 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
600 | return -EFAULT; | |
601 | ||
f64ca217 | 602 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
603 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
604 | return -EFAULT; | |
605 | ||
f64ca217 | 606 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
607 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
608 | return -EFAULT; | |
609 | ||
f64ca217 | 610 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
611 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
612 | return -EFAULT; | |
613 | ||
f64ca217 | 614 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
b0c632db HC |
615 | &vcpu->arch.guest_acrs, 64, prefix)) |
616 | return -EFAULT; | |
617 | ||
618 | if (__guestcopy(vcpu, | |
f64ca217 | 619 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
620 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
621 | return -EFAULT; | |
622 | return 0; | |
623 | } | |
624 | ||
b0c632db HC |
625 | long kvm_arch_vcpu_ioctl(struct file *filp, |
626 | unsigned int ioctl, unsigned long arg) | |
627 | { | |
628 | struct kvm_vcpu *vcpu = filp->private_data; | |
629 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 630 | long r; |
b0c632db | 631 | |
93736624 AK |
632 | switch (ioctl) { |
633 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
634 | struct kvm_s390_interrupt s390int; |
635 | ||
93736624 | 636 | r = -EFAULT; |
ba5c1e9b | 637 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
638 | break; |
639 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
640 | break; | |
ba5c1e9b | 641 | } |
b0c632db | 642 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
643 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
644 | break; | |
b0c632db HC |
645 | case KVM_S390_SET_INITIAL_PSW: { |
646 | psw_t psw; | |
647 | ||
bc923cc9 | 648 | r = -EFAULT; |
b0c632db | 649 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
650 | break; |
651 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
652 | break; | |
b0c632db HC |
653 | } |
654 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
655 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
656 | break; | |
b0c632db | 657 | default: |
bc923cc9 | 658 | r = -EINVAL; |
b0c632db | 659 | } |
bc923cc9 | 660 | return r; |
b0c632db HC |
661 | } |
662 | ||
663 | /* Section: memory related */ | |
f7784b8e MT |
664 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
665 | struct kvm_memory_slot *memslot, | |
666 | struct kvm_memory_slot old, | |
667 | struct kvm_userspace_memory_region *mem, | |
668 | int user_alloc) | |
b0c632db HC |
669 | { |
670 | /* A few sanity checks. We can have exactly one memory slot which has | |
671 | to start at guest virtual zero and which has to be located at a | |
672 | page boundary in userland and which has to end at a page boundary. | |
673 | The memory in userland is ok to be fragmented into various different | |
674 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
675 | doing this call at any time */ | |
676 | ||
628eb9b8 | 677 | if (mem->slot) |
b0c632db HC |
678 | return -EINVAL; |
679 | ||
680 | if (mem->guest_phys_addr) | |
681 | return -EINVAL; | |
682 | ||
598841ca | 683 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
684 | return -EINVAL; |
685 | ||
598841ca | 686 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
687 | return -EINVAL; |
688 | ||
2668dab7 CO |
689 | if (!user_alloc) |
690 | return -EINVAL; | |
691 | ||
f7784b8e MT |
692 | return 0; |
693 | } | |
694 | ||
695 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
696 | struct kvm_userspace_memory_region *mem, | |
697 | struct kvm_memory_slot old, | |
698 | int user_alloc) | |
699 | { | |
f7850c92 | 700 | int rc; |
f7784b8e | 701 | |
598841ca CO |
702 | |
703 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
704 | mem->guest_phys_addr, mem->memory_size); | |
705 | if (rc) | |
f7850c92 | 706 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 707 | return; |
b0c632db HC |
708 | } |
709 | ||
34d4cb8f MT |
710 | void kvm_arch_flush_shadow(struct kvm *kvm) |
711 | { | |
712 | } | |
713 | ||
b0c632db HC |
714 | static int __init kvm_s390_init(void) |
715 | { | |
ef50f7ac | 716 | int ret; |
0ee75bea | 717 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
718 | if (ret) |
719 | return ret; | |
720 | ||
721 | /* | |
722 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 723 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
724 | * only set facilities that are known to work in KVM. |
725 | */ | |
c2f0e8c8 | 726 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
727 | if (!facilities) { |
728 | kvm_exit(); | |
729 | return -ENOMEM; | |
730 | } | |
14375bc4 | 731 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
6d00d00b | 732 | facilities[0] &= 0xff00fff3f47c0000ULL; |
9950f8be | 733 | facilities[1] &= 0x201c000000000000ULL; |
ef50f7ac | 734 | return 0; |
b0c632db HC |
735 | } |
736 | ||
737 | static void __exit kvm_s390_exit(void) | |
738 | { | |
ef50f7ac | 739 | free_page((unsigned long) facilities); |
b0c632db HC |
740 | kvm_exit(); |
741 | } | |
742 | ||
743 | module_init(kvm_s390_init); | |
744 | module_exit(kvm_s390_exit); |