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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) }, |
bd59d3a4 | 68 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 69 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
70 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
71 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
72 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
73 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
74 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 75 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 76 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
b0c632db HC |
77 | { NULL } |
78 | }; | |
79 | ||
ef50f7ac | 80 | static unsigned long long *facilities; |
b0c632db HC |
81 | |
82 | /* Section: not file related */ | |
10474ae8 | 83 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
84 | { |
85 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 86 | return 0; |
b0c632db HC |
87 | } |
88 | ||
89 | void kvm_arch_hardware_disable(void *garbage) | |
90 | { | |
91 | } | |
92 | ||
b0c632db HC |
93 | int kvm_arch_hardware_setup(void) |
94 | { | |
95 | return 0; | |
96 | } | |
97 | ||
98 | void kvm_arch_hardware_unsetup(void) | |
99 | { | |
100 | } | |
101 | ||
102 | void kvm_arch_check_processor_compat(void *rtn) | |
103 | { | |
104 | } | |
105 | ||
106 | int kvm_arch_init(void *opaque) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | ||
111 | void kvm_arch_exit(void) | |
112 | { | |
113 | } | |
114 | ||
115 | /* Section: device related */ | |
116 | long kvm_arch_dev_ioctl(struct file *filp, | |
117 | unsigned int ioctl, unsigned long arg) | |
118 | { | |
119 | if (ioctl == KVM_S390_ENABLE_SIE) | |
120 | return s390_enable_sie(); | |
121 | return -EINVAL; | |
122 | } | |
123 | ||
124 | int kvm_dev_ioctl_check_extension(long ext) | |
125 | { | |
d7b0b5eb CO |
126 | int r; |
127 | ||
2bd0ac4e | 128 | switch (ext) { |
d7b0b5eb | 129 | case KVM_CAP_S390_PSW: |
b6cf8788 | 130 | case KVM_CAP_S390_GMAP: |
52e16b18 | 131 | case KVM_CAP_SYNC_MMU: |
d7b0b5eb CO |
132 | r = 1; |
133 | break; | |
2bd0ac4e | 134 | default: |
d7b0b5eb | 135 | r = 0; |
2bd0ac4e | 136 | } |
d7b0b5eb | 137 | return r; |
b0c632db HC |
138 | } |
139 | ||
140 | /* Section: vm related */ | |
141 | /* | |
142 | * Get (and clear) the dirty memory log for a memory slot. | |
143 | */ | |
144 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
145 | struct kvm_dirty_log *log) | |
146 | { | |
147 | return 0; | |
148 | } | |
149 | ||
150 | long kvm_arch_vm_ioctl(struct file *filp, | |
151 | unsigned int ioctl, unsigned long arg) | |
152 | { | |
153 | struct kvm *kvm = filp->private_data; | |
154 | void __user *argp = (void __user *)arg; | |
155 | int r; | |
156 | ||
157 | switch (ioctl) { | |
ba5c1e9b CO |
158 | case KVM_S390_INTERRUPT: { |
159 | struct kvm_s390_interrupt s390int; | |
160 | ||
161 | r = -EFAULT; | |
162 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
163 | break; | |
164 | r = kvm_s390_inject_vm(kvm, &s390int); | |
165 | break; | |
166 | } | |
b0c632db | 167 | default: |
367e1319 | 168 | r = -ENOTTY; |
b0c632db HC |
169 | } |
170 | ||
171 | return r; | |
172 | } | |
173 | ||
d89f5eff | 174 | int kvm_arch_init_vm(struct kvm *kvm) |
b0c632db | 175 | { |
b0c632db HC |
176 | int rc; |
177 | char debug_name[16]; | |
178 | ||
179 | rc = s390_enable_sie(); | |
180 | if (rc) | |
d89f5eff | 181 | goto out_err; |
b0c632db | 182 | |
b290411a CO |
183 | rc = -ENOMEM; |
184 | ||
b0c632db HC |
185 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
186 | if (!kvm->arch.sca) | |
d89f5eff | 187 | goto out_err; |
b0c632db HC |
188 | |
189 | sprintf(debug_name, "kvm-%u", current->pid); | |
190 | ||
191 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
192 | if (!kvm->arch.dbf) | |
193 | goto out_nodbf; | |
194 | ||
ba5c1e9b CO |
195 | spin_lock_init(&kvm->arch.float_int.lock); |
196 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
197 | ||
b0c632db HC |
198 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
199 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
200 | ||
598841ca CO |
201 | kvm->arch.gmap = gmap_alloc(current->mm); |
202 | if (!kvm->arch.gmap) | |
203 | goto out_nogmap; | |
204 | ||
d89f5eff | 205 | return 0; |
598841ca CO |
206 | out_nogmap: |
207 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
208 | out_nodbf: |
209 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
210 | out_err: |
211 | return rc; | |
b0c632db HC |
212 | } |
213 | ||
d329c035 CB |
214 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
215 | { | |
216 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
fc34531d | 217 | clear_bit(63 - vcpu->vcpu_id, (unsigned long *) &vcpu->kvm->arch.sca->mcn); |
abf4a71e CO |
218 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
219 | (__u64) vcpu->arch.sie_block) | |
220 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
221 | smp_mb(); | |
d329c035 | 222 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 223 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
224 | kfree(vcpu); |
225 | } | |
226 | ||
227 | static void kvm_free_vcpus(struct kvm *kvm) | |
228 | { | |
229 | unsigned int i; | |
988a2cae | 230 | struct kvm_vcpu *vcpu; |
d329c035 | 231 | |
988a2cae GN |
232 | kvm_for_each_vcpu(i, vcpu, kvm) |
233 | kvm_arch_vcpu_destroy(vcpu); | |
234 | ||
235 | mutex_lock(&kvm->lock); | |
236 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
237 | kvm->vcpus[i] = NULL; | |
238 | ||
239 | atomic_set(&kvm->online_vcpus, 0); | |
240 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
241 | } |
242 | ||
ad8ba2cd SY |
243 | void kvm_arch_sync_events(struct kvm *kvm) |
244 | { | |
245 | } | |
246 | ||
b0c632db HC |
247 | void kvm_arch_destroy_vm(struct kvm *kvm) |
248 | { | |
d329c035 | 249 | kvm_free_vcpus(kvm); |
b0c632db | 250 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 251 | debug_unregister(kvm->arch.dbf); |
598841ca | 252 | gmap_free(kvm->arch.gmap); |
b0c632db HC |
253 | } |
254 | ||
255 | /* Section: vcpu related */ | |
256 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
257 | { | |
598841ca | 258 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
b0c632db HC |
259 | return 0; |
260 | } | |
261 | ||
262 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
263 | { | |
6692cef3 | 264 | /* Nothing todo */ |
b0c632db HC |
265 | } |
266 | ||
267 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
268 | { | |
269 | save_fp_regs(&vcpu->arch.host_fpregs); | |
270 | save_access_regs(vcpu->arch.host_acrs); | |
271 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
272 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
273 | restore_access_regs(vcpu->arch.guest_acrs); | |
480e5926 | 274 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 275 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
276 | } |
277 | ||
278 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
279 | { | |
9e6dabef | 280 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 281 | gmap_disable(vcpu->arch.gmap); |
b0c632db HC |
282 | save_fp_regs(&vcpu->arch.guest_fpregs); |
283 | save_access_regs(vcpu->arch.guest_acrs); | |
284 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
285 | restore_access_regs(vcpu->arch.host_acrs); | |
286 | } | |
287 | ||
288 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
289 | { | |
290 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
291 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
292 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
293 | vcpu->arch.sie_block->prefix = 0UL; | |
294 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
295 | vcpu->arch.sie_block->cputm = 0UL; | |
296 | vcpu->arch.sie_block->ckc = 0UL; | |
297 | vcpu->arch.sie_block->todpr = 0; | |
298 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
299 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
300 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
301 | vcpu->arch.guest_fpregs.fpc = 0; | |
302 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
303 | vcpu->arch.sie_block->gbea = 1; | |
304 | } | |
305 | ||
306 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
307 | { | |
9e6dabef CH |
308 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
309 | CPUSTAT_SM | | |
310 | CPUSTAT_STOPPED); | |
fc34531d | 311 | vcpu->arch.sie_block->ecb = 6; |
b0c632db | 312 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 313 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
314 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
315 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
316 | (unsigned long) vcpu); | |
317 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 318 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 319 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
320 | return 0; |
321 | } | |
322 | ||
323 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
324 | unsigned int id) | |
325 | { | |
4d47555a CO |
326 | struct kvm_vcpu *vcpu; |
327 | int rc = -EINVAL; | |
328 | ||
329 | if (id >= KVM_MAX_VCPUS) | |
330 | goto out; | |
331 | ||
332 | rc = -ENOMEM; | |
b0c632db | 333 | |
4d47555a | 334 | vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); |
b0c632db | 335 | if (!vcpu) |
4d47555a | 336 | goto out; |
b0c632db | 337 | |
180c12fb CB |
338 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
339 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
340 | |
341 | if (!vcpu->arch.sie_block) | |
342 | goto out_free_cpu; | |
343 | ||
344 | vcpu->arch.sie_block->icpua = id; | |
345 | BUG_ON(!kvm->arch.sca); | |
abf4a71e CO |
346 | if (!kvm->arch.sca->cpu[id].sda) |
347 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
b0c632db HC |
348 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
349 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
fc34531d | 350 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); |
b0c632db | 351 | |
ba5c1e9b CO |
352 | spin_lock_init(&vcpu->arch.local_int.lock); |
353 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
354 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 355 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
356 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
357 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 358 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 359 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 360 | |
b0c632db HC |
361 | rc = kvm_vcpu_init(vcpu, kvm, id); |
362 | if (rc) | |
7b06bf2f | 363 | goto out_free_sie_block; |
b0c632db HC |
364 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
365 | vcpu->arch.sie_block); | |
366 | ||
b0c632db | 367 | return vcpu; |
7b06bf2f WY |
368 | out_free_sie_block: |
369 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db HC |
370 | out_free_cpu: |
371 | kfree(vcpu); | |
4d47555a | 372 | out: |
b0c632db HC |
373 | return ERR_PTR(rc); |
374 | } | |
375 | ||
b0c632db HC |
376 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
377 | { | |
378 | /* kvm common code refers to this, but never calls it */ | |
379 | BUG(); | |
380 | return 0; | |
381 | } | |
382 | ||
383 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
384 | { | |
b0c632db | 385 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
386 | return 0; |
387 | } | |
388 | ||
389 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
390 | { | |
b0c632db | 391 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
392 | return 0; |
393 | } | |
394 | ||
395 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
396 | { | |
b0c632db | 397 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); |
b0c632db HC |
398 | return 0; |
399 | } | |
400 | ||
401 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
402 | struct kvm_sregs *sregs) | |
403 | { | |
b0c632db HC |
404 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); |
405 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
7eef87dc | 406 | restore_access_regs(vcpu->arch.guest_acrs); |
b0c632db HC |
407 | return 0; |
408 | } | |
409 | ||
410 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
411 | struct kvm_sregs *sregs) | |
412 | { | |
b0c632db HC |
413 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); |
414 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
b0c632db HC |
415 | return 0; |
416 | } | |
417 | ||
418 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
419 | { | |
b0c632db HC |
420 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
421 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
7eef87dc | 422 | restore_fp_regs(&vcpu->arch.guest_fpregs); |
b0c632db HC |
423 | return 0; |
424 | } | |
425 | ||
426 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
427 | { | |
b0c632db HC |
428 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
429 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
430 | return 0; |
431 | } | |
432 | ||
433 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
434 | { | |
435 | int rc = 0; | |
436 | ||
9e6dabef | 437 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 438 | rc = -EBUSY; |
d7b0b5eb CO |
439 | else { |
440 | vcpu->run->psw_mask = psw.mask; | |
441 | vcpu->run->psw_addr = psw.addr; | |
442 | } | |
b0c632db HC |
443 | return rc; |
444 | } | |
445 | ||
446 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
447 | struct kvm_translation *tr) | |
448 | { | |
449 | return -EINVAL; /* not implemented yet */ | |
450 | } | |
451 | ||
d0bfb940 JK |
452 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
453 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
454 | { |
455 | return -EINVAL; /* not implemented yet */ | |
456 | } | |
457 | ||
62d9f0db MT |
458 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
459 | struct kvm_mp_state *mp_state) | |
460 | { | |
461 | return -EINVAL; /* not implemented yet */ | |
462 | } | |
463 | ||
464 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
465 | struct kvm_mp_state *mp_state) | |
466 | { | |
467 | return -EINVAL; /* not implemented yet */ | |
468 | } | |
469 | ||
b0c632db HC |
470 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
471 | { | |
472 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
473 | ||
474 | if (need_resched()) | |
475 | schedule(); | |
476 | ||
71cde587 CB |
477 | if (test_thread_flag(TIF_MCCK_PENDING)) |
478 | s390_handle_mcck(); | |
479 | ||
0ff31867 CO |
480 | kvm_s390_deliver_pending_interrupts(vcpu); |
481 | ||
b0c632db HC |
482 | vcpu->arch.sie_block->icptcode = 0; |
483 | local_irq_disable(); | |
484 | kvm_guest_enter(); | |
485 | local_irq_enable(); | |
486 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
487 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
1f0d0f09 CO |
488 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
489 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
490 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
491 | } | |
b0c632db HC |
492 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
493 | vcpu->arch.sie_block->icptcode); | |
494 | local_irq_disable(); | |
495 | kvm_guest_exit(); | |
496 | local_irq_enable(); | |
497 | ||
498 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
499 | } | |
500 | ||
501 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
502 | { | |
8f2abe6a | 503 | int rc; |
b0c632db HC |
504 | sigset_t sigsaved; |
505 | ||
9ace903d | 506 | rerun_vcpu: |
b0c632db HC |
507 | if (vcpu->sigset_active) |
508 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
509 | ||
9e6dabef | 510 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 511 | |
ba5c1e9b CO |
512 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
513 | ||
8f2abe6a CB |
514 | switch (kvm_run->exit_reason) { |
515 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 516 | case KVM_EXIT_UNKNOWN: |
9ace903d | 517 | case KVM_EXIT_INTR: |
8f2abe6a CB |
518 | case KVM_EXIT_S390_RESET: |
519 | break; | |
520 | default: | |
521 | BUG(); | |
522 | } | |
523 | ||
d7b0b5eb CO |
524 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
525 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
526 | ||
dab4079d | 527 | might_fault(); |
8f2abe6a CB |
528 | |
529 | do { | |
530 | __vcpu_run(vcpu); | |
8f2abe6a CB |
531 | rc = kvm_handle_sie_intercept(vcpu); |
532 | } while (!signal_pending(current) && !rc); | |
533 | ||
9ace903d CE |
534 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
535 | goto rerun_vcpu; | |
536 | ||
b1d16c49 CE |
537 | if (signal_pending(current) && !rc) { |
538 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 539 | rc = -EINTR; |
b1d16c49 | 540 | } |
8f2abe6a | 541 | |
b8e660b8 | 542 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
543 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
544 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
545 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
546 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
547 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
548 | rc = 0; | |
549 | } | |
550 | ||
551 | if (rc == -EREMOTE) { | |
552 | /* intercept was handled, but userspace support is needed | |
553 | * kvm_run has been prepared by the handler */ | |
554 | rc = 0; | |
555 | } | |
b0c632db | 556 | |
d7b0b5eb CO |
557 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
558 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
559 | ||
b0c632db HC |
560 | if (vcpu->sigset_active) |
561 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
562 | ||
b0c632db | 563 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 564 | return rc; |
b0c632db HC |
565 | } |
566 | ||
092670cd | 567 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
568 | unsigned long n, int prefix) |
569 | { | |
570 | if (prefix) | |
571 | return copy_to_guest(vcpu, guestdest, from, n); | |
572 | else | |
573 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
574 | } | |
575 | ||
576 | /* | |
577 | * store status at address | |
578 | * we use have two special cases: | |
579 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
580 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
581 | */ | |
971eb77f | 582 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 583 | { |
092670cd | 584 | unsigned char archmode = 1; |
b0c632db HC |
585 | int prefix; |
586 | ||
587 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
588 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
589 | return -EFAULT; | |
590 | addr = SAVE_AREA_BASE; | |
591 | prefix = 0; | |
592 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
593 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
594 | return -EFAULT; | |
595 | addr = SAVE_AREA_BASE; | |
596 | prefix = 1; | |
597 | } else | |
598 | prefix = 0; | |
599 | ||
f64ca217 | 600 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
601 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
602 | return -EFAULT; | |
603 | ||
f64ca217 | 604 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
b0c632db HC |
605 | vcpu->arch.guest_gprs, 128, prefix)) |
606 | return -EFAULT; | |
607 | ||
f64ca217 | 608 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
609 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
610 | return -EFAULT; | |
611 | ||
f64ca217 | 612 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
613 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
614 | return -EFAULT; | |
615 | ||
616 | if (__guestcopy(vcpu, | |
f64ca217 | 617 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
618 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
619 | return -EFAULT; | |
620 | ||
f64ca217 | 621 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
622 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
623 | return -EFAULT; | |
624 | ||
f64ca217 | 625 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
626 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
627 | return -EFAULT; | |
628 | ||
f64ca217 | 629 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
630 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
631 | return -EFAULT; | |
632 | ||
f64ca217 | 633 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
b0c632db HC |
634 | &vcpu->arch.guest_acrs, 64, prefix)) |
635 | return -EFAULT; | |
636 | ||
637 | if (__guestcopy(vcpu, | |
f64ca217 | 638 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
639 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
640 | return -EFAULT; | |
641 | return 0; | |
642 | } | |
643 | ||
b0c632db HC |
644 | long kvm_arch_vcpu_ioctl(struct file *filp, |
645 | unsigned int ioctl, unsigned long arg) | |
646 | { | |
647 | struct kvm_vcpu *vcpu = filp->private_data; | |
648 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 649 | long r; |
b0c632db | 650 | |
93736624 AK |
651 | switch (ioctl) { |
652 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
653 | struct kvm_s390_interrupt s390int; |
654 | ||
93736624 | 655 | r = -EFAULT; |
ba5c1e9b | 656 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
657 | break; |
658 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
659 | break; | |
ba5c1e9b | 660 | } |
b0c632db | 661 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
662 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
663 | break; | |
b0c632db HC |
664 | case KVM_S390_SET_INITIAL_PSW: { |
665 | psw_t psw; | |
666 | ||
bc923cc9 | 667 | r = -EFAULT; |
b0c632db | 668 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
669 | break; |
670 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
671 | break; | |
b0c632db HC |
672 | } |
673 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
674 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
675 | break; | |
b0c632db | 676 | default: |
bc923cc9 | 677 | r = -EINVAL; |
b0c632db | 678 | } |
bc923cc9 | 679 | return r; |
b0c632db HC |
680 | } |
681 | ||
682 | /* Section: memory related */ | |
f7784b8e MT |
683 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
684 | struct kvm_memory_slot *memslot, | |
685 | struct kvm_memory_slot old, | |
686 | struct kvm_userspace_memory_region *mem, | |
687 | int user_alloc) | |
b0c632db HC |
688 | { |
689 | /* A few sanity checks. We can have exactly one memory slot which has | |
690 | to start at guest virtual zero and which has to be located at a | |
691 | page boundary in userland and which has to end at a page boundary. | |
692 | The memory in userland is ok to be fragmented into various different | |
693 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
694 | doing this call at any time */ | |
695 | ||
628eb9b8 | 696 | if (mem->slot) |
b0c632db HC |
697 | return -EINVAL; |
698 | ||
699 | if (mem->guest_phys_addr) | |
700 | return -EINVAL; | |
701 | ||
598841ca | 702 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
703 | return -EINVAL; |
704 | ||
598841ca | 705 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
706 | return -EINVAL; |
707 | ||
2668dab7 CO |
708 | if (!user_alloc) |
709 | return -EINVAL; | |
710 | ||
f7784b8e MT |
711 | return 0; |
712 | } | |
713 | ||
714 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
715 | struct kvm_userspace_memory_region *mem, | |
716 | struct kvm_memory_slot old, | |
717 | int user_alloc) | |
718 | { | |
f7850c92 | 719 | int rc; |
f7784b8e | 720 | |
598841ca CO |
721 | |
722 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
723 | mem->guest_phys_addr, mem->memory_size); | |
724 | if (rc) | |
f7850c92 | 725 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 726 | return; |
b0c632db HC |
727 | } |
728 | ||
34d4cb8f MT |
729 | void kvm_arch_flush_shadow(struct kvm *kvm) |
730 | { | |
731 | } | |
732 | ||
b0c632db HC |
733 | static int __init kvm_s390_init(void) |
734 | { | |
ef50f7ac | 735 | int ret; |
0ee75bea | 736 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
737 | if (ret) |
738 | return ret; | |
739 | ||
740 | /* | |
741 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 742 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
743 | * only set facilities that are known to work in KVM. |
744 | */ | |
c2f0e8c8 | 745 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
746 | if (!facilities) { |
747 | kvm_exit(); | |
748 | return -ENOMEM; | |
749 | } | |
14375bc4 | 750 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
6d00d00b | 751 | facilities[0] &= 0xff00fff3f47c0000ULL; |
9950f8be | 752 | facilities[1] &= 0x201c000000000000ULL; |
ef50f7ac | 753 | return 0; |
b0c632db HC |
754 | } |
755 | ||
756 | static void __exit kvm_s390_exit(void) | |
757 | { | |
ef50f7ac | 758 | free_page((unsigned long) facilities); |
b0c632db HC |
759 | kvm_exit(); |
760 | } | |
761 | ||
762 | module_init(kvm_s390_init); | |
763 | module_exit(kvm_s390_exit); |