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) }, | |
7697e71f | 49 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
50 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
51 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
52 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
53 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
54 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
55 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
56 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
453423dc CB |
57 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
58 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
59 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
60 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
61 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
62 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
63 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
64 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
65 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 66 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 67 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
7697e71f | 68 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
69 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
70 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
71 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
72 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
73 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 74 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 75 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
b0c632db HC |
76 | { NULL } |
77 | }; | |
78 | ||
ef50f7ac | 79 | static unsigned long long *facilities; |
b0c632db HC |
80 | |
81 | /* Section: not file related */ | |
10474ae8 | 82 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
83 | { |
84 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 85 | return 0; |
b0c632db HC |
86 | } |
87 | ||
88 | void kvm_arch_hardware_disable(void *garbage) | |
89 | { | |
90 | } | |
91 | ||
b0c632db HC |
92 | int kvm_arch_hardware_setup(void) |
93 | { | |
94 | return 0; | |
95 | } | |
96 | ||
97 | void kvm_arch_hardware_unsetup(void) | |
98 | { | |
99 | } | |
100 | ||
101 | void kvm_arch_check_processor_compat(void *rtn) | |
102 | { | |
103 | } | |
104 | ||
105 | int kvm_arch_init(void *opaque) | |
106 | { | |
107 | return 0; | |
108 | } | |
109 | ||
110 | void kvm_arch_exit(void) | |
111 | { | |
112 | } | |
113 | ||
114 | /* Section: device related */ | |
115 | long kvm_arch_dev_ioctl(struct file *filp, | |
116 | unsigned int ioctl, unsigned long arg) | |
117 | { | |
118 | if (ioctl == KVM_S390_ENABLE_SIE) | |
119 | return s390_enable_sie(); | |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | int kvm_dev_ioctl_check_extension(long ext) | |
124 | { | |
d7b0b5eb CO |
125 | int r; |
126 | ||
2bd0ac4e | 127 | switch (ext) { |
d7b0b5eb | 128 | case KVM_CAP_S390_PSW: |
b6cf8788 | 129 | case KVM_CAP_S390_GMAP: |
d7b0b5eb CO |
130 | r = 1; |
131 | break; | |
2bd0ac4e | 132 | default: |
d7b0b5eb | 133 | r = 0; |
2bd0ac4e | 134 | } |
d7b0b5eb | 135 | return r; |
b0c632db HC |
136 | } |
137 | ||
138 | /* Section: vm related */ | |
139 | /* | |
140 | * Get (and clear) the dirty memory log for a memory slot. | |
141 | */ | |
142 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
143 | struct kvm_dirty_log *log) | |
144 | { | |
145 | return 0; | |
146 | } | |
147 | ||
148 | long kvm_arch_vm_ioctl(struct file *filp, | |
149 | unsigned int ioctl, unsigned long arg) | |
150 | { | |
151 | struct kvm *kvm = filp->private_data; | |
152 | void __user *argp = (void __user *)arg; | |
153 | int r; | |
154 | ||
155 | switch (ioctl) { | |
ba5c1e9b CO |
156 | case KVM_S390_INTERRUPT: { |
157 | struct kvm_s390_interrupt s390int; | |
158 | ||
159 | r = -EFAULT; | |
160 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
161 | break; | |
162 | r = kvm_s390_inject_vm(kvm, &s390int); | |
163 | break; | |
164 | } | |
b0c632db | 165 | default: |
367e1319 | 166 | r = -ENOTTY; |
b0c632db HC |
167 | } |
168 | ||
169 | return r; | |
170 | } | |
171 | ||
d89f5eff | 172 | int kvm_arch_init_vm(struct kvm *kvm) |
b0c632db | 173 | { |
b0c632db HC |
174 | int rc; |
175 | char debug_name[16]; | |
176 | ||
177 | rc = s390_enable_sie(); | |
178 | if (rc) | |
d89f5eff | 179 | goto out_err; |
b0c632db | 180 | |
b290411a CO |
181 | rc = -ENOMEM; |
182 | ||
b0c632db HC |
183 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
184 | if (!kvm->arch.sca) | |
d89f5eff | 185 | goto out_err; |
b0c632db HC |
186 | |
187 | sprintf(debug_name, "kvm-%u", current->pid); | |
188 | ||
189 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
190 | if (!kvm->arch.dbf) | |
191 | goto out_nodbf; | |
192 | ||
ba5c1e9b CO |
193 | spin_lock_init(&kvm->arch.float_int.lock); |
194 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
195 | ||
b0c632db HC |
196 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
197 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
198 | ||
598841ca CO |
199 | kvm->arch.gmap = gmap_alloc(current->mm); |
200 | if (!kvm->arch.gmap) | |
201 | goto out_nogmap; | |
202 | ||
d89f5eff | 203 | return 0; |
598841ca CO |
204 | out_nogmap: |
205 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
206 | out_nodbf: |
207 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
208 | out_err: |
209 | return rc; | |
b0c632db HC |
210 | } |
211 | ||
d329c035 CB |
212 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
213 | { | |
214 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
fc34531d | 215 | clear_bit(63 - vcpu->vcpu_id, (unsigned long *) &vcpu->kvm->arch.sca->mcn); |
abf4a71e CO |
216 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
217 | (__u64) vcpu->arch.sie_block) | |
218 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
219 | smp_mb(); | |
d329c035 | 220 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 221 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
222 | kfree(vcpu); |
223 | } | |
224 | ||
225 | static void kvm_free_vcpus(struct kvm *kvm) | |
226 | { | |
227 | unsigned int i; | |
988a2cae | 228 | struct kvm_vcpu *vcpu; |
d329c035 | 229 | |
988a2cae GN |
230 | kvm_for_each_vcpu(i, vcpu, kvm) |
231 | kvm_arch_vcpu_destroy(vcpu); | |
232 | ||
233 | mutex_lock(&kvm->lock); | |
234 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
235 | kvm->vcpus[i] = NULL; | |
236 | ||
237 | atomic_set(&kvm->online_vcpus, 0); | |
238 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
239 | } |
240 | ||
ad8ba2cd SY |
241 | void kvm_arch_sync_events(struct kvm *kvm) |
242 | { | |
243 | } | |
244 | ||
b0c632db HC |
245 | void kvm_arch_destroy_vm(struct kvm *kvm) |
246 | { | |
d329c035 | 247 | kvm_free_vcpus(kvm); |
b0c632db | 248 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 249 | debug_unregister(kvm->arch.dbf); |
598841ca | 250 | gmap_free(kvm->arch.gmap); |
b0c632db HC |
251 | } |
252 | ||
253 | /* Section: vcpu related */ | |
254 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
255 | { | |
598841ca | 256 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
b0c632db HC |
257 | return 0; |
258 | } | |
259 | ||
260 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
261 | { | |
6692cef3 | 262 | /* Nothing todo */ |
b0c632db HC |
263 | } |
264 | ||
265 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
266 | { | |
267 | save_fp_regs(&vcpu->arch.host_fpregs); | |
268 | save_access_regs(vcpu->arch.host_acrs); | |
269 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
270 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
271 | restore_access_regs(vcpu->arch.guest_acrs); | |
480e5926 | 272 | gmap_enable(vcpu->arch.gmap); |
b0c632db HC |
273 | } |
274 | ||
275 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
276 | { | |
480e5926 | 277 | gmap_disable(vcpu->arch.gmap); |
b0c632db HC |
278 | save_fp_regs(&vcpu->arch.guest_fpregs); |
279 | save_access_regs(vcpu->arch.guest_acrs); | |
280 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
281 | restore_access_regs(vcpu->arch.host_acrs); | |
282 | } | |
283 | ||
284 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
285 | { | |
286 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
287 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
288 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
289 | vcpu->arch.sie_block->prefix = 0UL; | |
290 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
291 | vcpu->arch.sie_block->cputm = 0UL; | |
292 | vcpu->arch.sie_block->ckc = 0UL; | |
293 | vcpu->arch.sie_block->todpr = 0; | |
294 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
295 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
296 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
297 | vcpu->arch.guest_fpregs.fpc = 0; | |
298 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
299 | vcpu->arch.sie_block->gbea = 1; | |
300 | } | |
301 | ||
302 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
303 | { | |
598841ca | 304 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | CPUSTAT_SM); |
fc34531d | 305 | vcpu->arch.sie_block->ecb = 6; |
b0c632db | 306 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 307 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
308 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
309 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
310 | (unsigned long) vcpu); | |
311 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 312 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 313 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
314 | return 0; |
315 | } | |
316 | ||
317 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
318 | unsigned int id) | |
319 | { | |
4d47555a CO |
320 | struct kvm_vcpu *vcpu; |
321 | int rc = -EINVAL; | |
322 | ||
323 | if (id >= KVM_MAX_VCPUS) | |
324 | goto out; | |
325 | ||
326 | rc = -ENOMEM; | |
b0c632db | 327 | |
4d47555a | 328 | vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
b0c632db | 329 | if (!vcpu) |
4d47555a | 330 | goto out; |
b0c632db | 331 | |
180c12fb CB |
332 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
333 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
334 | |
335 | if (!vcpu->arch.sie_block) | |
336 | goto out_free_cpu; | |
337 | ||
338 | vcpu->arch.sie_block->icpua = id; | |
339 | BUG_ON(!kvm->arch.sca); | |
abf4a71e CO |
340 | if (!kvm->arch.sca->cpu[id].sda) |
341 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
b0c632db HC |
342 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
343 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
fc34531d | 344 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); |
b0c632db | 345 | |
ba5c1e9b CO |
346 | spin_lock_init(&vcpu->arch.local_int.lock); |
347 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
348 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 349 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
350 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
351 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 352 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 353 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 354 | |
b0c632db HC |
355 | rc = kvm_vcpu_init(vcpu, kvm, id); |
356 | if (rc) | |
7b06bf2f | 357 | goto out_free_sie_block; |
b0c632db HC |
358 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
359 | vcpu->arch.sie_block); | |
360 | ||
b0c632db | 361 | return vcpu; |
7b06bf2f WY |
362 | out_free_sie_block: |
363 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db HC |
364 | out_free_cpu: |
365 | kfree(vcpu); | |
4d47555a | 366 | out: |
b0c632db HC |
367 | return ERR_PTR(rc); |
368 | } | |
369 | ||
b0c632db HC |
370 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
371 | { | |
372 | /* kvm common code refers to this, but never calls it */ | |
373 | BUG(); | |
374 | return 0; | |
375 | } | |
376 | ||
377 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
378 | { | |
b0c632db | 379 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
380 | return 0; |
381 | } | |
382 | ||
383 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
384 | { | |
b0c632db | 385 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
386 | return 0; |
387 | } | |
388 | ||
389 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
390 | { | |
b0c632db | 391 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); |
b0c632db HC |
392 | return 0; |
393 | } | |
394 | ||
395 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
396 | struct kvm_sregs *sregs) | |
397 | { | |
b0c632db HC |
398 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); |
399 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
7eef87dc | 400 | restore_access_regs(vcpu->arch.guest_acrs); |
b0c632db HC |
401 | return 0; |
402 | } | |
403 | ||
404 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
405 | struct kvm_sregs *sregs) | |
406 | { | |
b0c632db HC |
407 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); |
408 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
b0c632db HC |
409 | return 0; |
410 | } | |
411 | ||
412 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
413 | { | |
b0c632db HC |
414 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
415 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
7eef87dc | 416 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
b0c632db HC |
417 | return 0; |
418 | } | |
419 | ||
420 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
421 | { | |
b0c632db HC |
422 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
423 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
424 | return 0; |
425 | } | |
426 | ||
427 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
428 | { | |
429 | int rc = 0; | |
430 | ||
b0c632db HC |
431 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) |
432 | rc = -EBUSY; | |
d7b0b5eb CO |
433 | else { |
434 | vcpu->run->psw_mask = psw.mask; | |
435 | vcpu->run->psw_addr = psw.addr; | |
436 | } | |
b0c632db HC |
437 | return rc; |
438 | } | |
439 | ||
440 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
441 | struct kvm_translation *tr) | |
442 | { | |
443 | return -EINVAL; /* not implemented yet */ | |
444 | } | |
445 | ||
d0bfb940 JK |
446 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
447 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
448 | { |
449 | return -EINVAL; /* not implemented yet */ | |
450 | } | |
451 | ||
62d9f0db MT |
452 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
453 | struct kvm_mp_state *mp_state) | |
454 | { | |
455 | return -EINVAL; /* not implemented yet */ | |
456 | } | |
457 | ||
458 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
459 | struct kvm_mp_state *mp_state) | |
460 | { | |
461 | return -EINVAL; /* not implemented yet */ | |
462 | } | |
463 | ||
b0c632db HC |
464 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
465 | { | |
466 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
467 | ||
468 | if (need_resched()) | |
469 | schedule(); | |
470 | ||
71cde587 CB |
471 | if (test_thread_flag(TIF_MCCK_PENDING)) |
472 | s390_handle_mcck(); | |
473 | ||
0ff31867 CO |
474 | kvm_s390_deliver_pending_interrupts(vcpu); |
475 | ||
b0c632db HC |
476 | vcpu->arch.sie_block->icptcode = 0; |
477 | local_irq_disable(); | |
478 | kvm_guest_enter(); | |
479 | local_irq_enable(); | |
480 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
481 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
1f0d0f09 CO |
482 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
483 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
484 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
485 | } | |
b0c632db HC |
486 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
487 | vcpu->arch.sie_block->icptcode); | |
488 | local_irq_disable(); | |
489 | kvm_guest_exit(); | |
490 | local_irq_enable(); | |
491 | ||
492 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
493 | } | |
494 | ||
495 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
496 | { | |
8f2abe6a | 497 | int rc; |
b0c632db HC |
498 | sigset_t sigsaved; |
499 | ||
9ace903d | 500 | rerun_vcpu: |
b0c632db HC |
501 | if (vcpu->sigset_active) |
502 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
503 | ||
504 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
505 | ||
ba5c1e9b CO |
506 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
507 | ||
8f2abe6a CB |
508 | switch (kvm_run->exit_reason) { |
509 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 510 | case KVM_EXIT_UNKNOWN: |
9ace903d | 511 | case KVM_EXIT_INTR: |
8f2abe6a CB |
512 | case KVM_EXIT_S390_RESET: |
513 | break; | |
514 | default: | |
515 | BUG(); | |
516 | } | |
517 | ||
d7b0b5eb CO |
518 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
519 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
520 | ||
dab4079d | 521 | might_fault(); |
8f2abe6a CB |
522 | |
523 | do { | |
524 | __vcpu_run(vcpu); | |
8f2abe6a CB |
525 | rc = kvm_handle_sie_intercept(vcpu); |
526 | } while (!signal_pending(current) && !rc); | |
527 | ||
9ace903d CE |
528 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
529 | goto rerun_vcpu; | |
530 | ||
b1d16c49 CE |
531 | if (signal_pending(current) && !rc) { |
532 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 533 | rc = -EINTR; |
b1d16c49 | 534 | } |
8f2abe6a | 535 | |
b8e660b8 | 536 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
537 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
538 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
539 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
540 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
541 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
542 | rc = 0; | |
543 | } | |
544 | ||
545 | if (rc == -EREMOTE) { | |
546 | /* intercept was handled, but userspace support is needed | |
547 | * kvm_run has been prepared by the handler */ | |
548 | rc = 0; | |
549 | } | |
b0c632db | 550 | |
d7b0b5eb CO |
551 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
552 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
553 | ||
b0c632db HC |
554 | if (vcpu->sigset_active) |
555 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
556 | ||
b0c632db | 557 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 558 | return rc; |
b0c632db HC |
559 | } |
560 | ||
092670cd | 561 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
562 | unsigned long n, int prefix) |
563 | { | |
564 | if (prefix) | |
565 | return copy_to_guest(vcpu, guestdest, from, n); | |
566 | else | |
567 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
568 | } | |
569 | ||
570 | /* | |
571 | * store status at address | |
572 | * we use have two special cases: | |
573 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
574 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
575 | */ | |
971eb77f | 576 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 577 | { |
092670cd | 578 | unsigned char archmode = 1; |
b0c632db HC |
579 | int prefix; |
580 | ||
581 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
582 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
583 | return -EFAULT; | |
584 | addr = SAVE_AREA_BASE; | |
585 | prefix = 0; | |
586 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
587 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
588 | return -EFAULT; | |
589 | addr = SAVE_AREA_BASE; | |
590 | prefix = 1; | |
591 | } else | |
592 | prefix = 0; | |
593 | ||
f64ca217 | 594 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
595 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
596 | return -EFAULT; | |
597 | ||
f64ca217 | 598 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
b0c632db HC |
599 | vcpu->arch.guest_gprs, 128, prefix)) |
600 | return -EFAULT; | |
601 | ||
f64ca217 | 602 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
603 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
604 | return -EFAULT; | |
605 | ||
f64ca217 | 606 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
607 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
608 | return -EFAULT; | |
609 | ||
610 | if (__guestcopy(vcpu, | |
f64ca217 | 611 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
612 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
613 | return -EFAULT; | |
614 | ||
f64ca217 | 615 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
616 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
617 | return -EFAULT; | |
618 | ||
f64ca217 | 619 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
620 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
621 | return -EFAULT; | |
622 | ||
f64ca217 | 623 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
624 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
625 | return -EFAULT; | |
626 | ||
f64ca217 | 627 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
b0c632db HC |
628 | &vcpu->arch.guest_acrs, 64, prefix)) |
629 | return -EFAULT; | |
630 | ||
631 | if (__guestcopy(vcpu, | |
f64ca217 | 632 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
633 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
634 | return -EFAULT; | |
635 | return 0; | |
636 | } | |
637 | ||
b0c632db HC |
638 | long kvm_arch_vcpu_ioctl(struct file *filp, |
639 | unsigned int ioctl, unsigned long arg) | |
640 | { | |
641 | struct kvm_vcpu *vcpu = filp->private_data; | |
642 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 643 | long r; |
b0c632db | 644 | |
93736624 AK |
645 | switch (ioctl) { |
646 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
647 | struct kvm_s390_interrupt s390int; |
648 | ||
93736624 | 649 | r = -EFAULT; |
ba5c1e9b | 650 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
651 | break; |
652 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
653 | break; | |
ba5c1e9b | 654 | } |
b0c632db | 655 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
656 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
657 | break; | |
b0c632db HC |
658 | case KVM_S390_SET_INITIAL_PSW: { |
659 | psw_t psw; | |
660 | ||
bc923cc9 | 661 | r = -EFAULT; |
b0c632db | 662 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
663 | break; |
664 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
665 | break; | |
b0c632db HC |
666 | } |
667 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
668 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
669 | break; | |
b0c632db | 670 | default: |
bc923cc9 | 671 | r = -EINVAL; |
b0c632db | 672 | } |
bc923cc9 | 673 | return r; |
b0c632db HC |
674 | } |
675 | ||
676 | /* Section: memory related */ | |
f7784b8e MT |
677 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
678 | struct kvm_memory_slot *memslot, | |
679 | struct kvm_memory_slot old, | |
680 | struct kvm_userspace_memory_region *mem, | |
681 | int user_alloc) | |
b0c632db HC |
682 | { |
683 | /* A few sanity checks. We can have exactly one memory slot which has | |
684 | to start at guest virtual zero and which has to be located at a | |
685 | page boundary in userland and which has to end at a page boundary. | |
686 | The memory in userland is ok to be fragmented into various different | |
687 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
688 | doing this call at any time */ | |
689 | ||
628eb9b8 | 690 | if (mem->slot) |
b0c632db HC |
691 | return -EINVAL; |
692 | ||
693 | if (mem->guest_phys_addr) | |
694 | return -EINVAL; | |
695 | ||
598841ca | 696 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
697 | return -EINVAL; |
698 | ||
598841ca | 699 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
700 | return -EINVAL; |
701 | ||
2668dab7 CO |
702 | if (!user_alloc) |
703 | return -EINVAL; | |
704 | ||
f7784b8e MT |
705 | return 0; |
706 | } | |
707 | ||
708 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
709 | struct kvm_userspace_memory_region *mem, | |
710 | struct kvm_memory_slot old, | |
711 | int user_alloc) | |
712 | { | |
f7850c92 | 713 | int rc; |
f7784b8e | 714 | |
598841ca CO |
715 | |
716 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
717 | mem->guest_phys_addr, mem->memory_size); | |
718 | if (rc) | |
f7850c92 | 719 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 720 | return; |
b0c632db HC |
721 | } |
722 | ||
34d4cb8f MT |
723 | void kvm_arch_flush_shadow(struct kvm *kvm) |
724 | { | |
725 | } | |
726 | ||
b0c632db HC |
727 | static int __init kvm_s390_init(void) |
728 | { | |
ef50f7ac | 729 | int ret; |
0ee75bea | 730 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
731 | if (ret) |
732 | return ret; | |
733 | ||
734 | /* | |
735 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 736 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
737 | * only set facilities that are known to work in KVM. |
738 | */ | |
c2f0e8c8 | 739 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
740 | if (!facilities) { |
741 | kvm_exit(); | |
742 | return -ENOMEM; | |
743 | } | |
14375bc4 | 744 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
6d00d00b | 745 | facilities[0] &= 0xff00fff3f47c0000ULL; |
9950f8be | 746 | facilities[1] &= 0x201c000000000000ULL; |
ef50f7ac | 747 | return 0; |
b0c632db HC |
748 | } |
749 | ||
750 | static void __exit kvm_s390_exit(void) | |
751 | { | |
ef50f7ac | 752 | free_page((unsigned long) facilities); |
b0c632db HC |
753 | kvm_exit(); |
754 | } | |
755 | ||
756 | module_init(kvm_s390_init); | |
757 | module_exit(kvm_s390_exit); |