Commit | Line | Data |
---|---|---|
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 CO |
125 | case KVM_CAP_S390_PSW: |
126 | r = 1; | |
127 | break; | |
2bd0ac4e | 128 | default: |
d7b0b5eb | 129 | r = 0; |
2bd0ac4e | 130 | } |
d7b0b5eb | 131 | return r; |
b0c632db HC |
132 | } |
133 | ||
134 | /* Section: vm related */ | |
135 | /* | |
136 | * Get (and clear) the dirty memory log for a memory slot. | |
137 | */ | |
138 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
139 | struct kvm_dirty_log *log) | |
140 | { | |
141 | return 0; | |
142 | } | |
143 | ||
144 | long kvm_arch_vm_ioctl(struct file *filp, | |
145 | unsigned int ioctl, unsigned long arg) | |
146 | { | |
147 | struct kvm *kvm = filp->private_data; | |
148 | void __user *argp = (void __user *)arg; | |
149 | int r; | |
150 | ||
151 | switch (ioctl) { | |
ba5c1e9b CO |
152 | case KVM_S390_INTERRUPT: { |
153 | struct kvm_s390_interrupt s390int; | |
154 | ||
155 | r = -EFAULT; | |
156 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
157 | break; | |
158 | r = kvm_s390_inject_vm(kvm, &s390int); | |
159 | break; | |
160 | } | |
b0c632db | 161 | default: |
367e1319 | 162 | r = -ENOTTY; |
b0c632db HC |
163 | } |
164 | ||
165 | return r; | |
166 | } | |
167 | ||
d89f5eff | 168 | int kvm_arch_init_vm(struct kvm *kvm) |
b0c632db | 169 | { |
b0c632db HC |
170 | int rc; |
171 | char debug_name[16]; | |
172 | ||
173 | rc = s390_enable_sie(); | |
174 | if (rc) | |
d89f5eff | 175 | goto out_err; |
b0c632db HC |
176 | |
177 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); | |
178 | if (!kvm->arch.sca) | |
d89f5eff | 179 | goto out_err; |
b0c632db HC |
180 | |
181 | sprintf(debug_name, "kvm-%u", current->pid); | |
182 | ||
183 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
184 | if (!kvm->arch.dbf) | |
185 | goto out_nodbf; | |
186 | ||
ba5c1e9b CO |
187 | spin_lock_init(&kvm->arch.float_int.lock); |
188 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
189 | ||
b0c632db HC |
190 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
191 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
192 | ||
d89f5eff | 193 | return 0; |
b0c632db HC |
194 | out_nodbf: |
195 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
196 | out_err: |
197 | return rc; | |
b0c632db HC |
198 | } |
199 | ||
d329c035 CB |
200 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
201 | { | |
202 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
fc34531d | 203 | clear_bit(63 - vcpu->vcpu_id, (unsigned long *) &vcpu->kvm->arch.sca->mcn); |
abf4a71e CO |
204 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == |
205 | (__u64) vcpu->arch.sie_block) | |
206 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
207 | smp_mb(); | |
d329c035 | 208 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 209 | kvm_vcpu_uninit(vcpu); |
d329c035 CB |
210 | kfree(vcpu); |
211 | } | |
212 | ||
213 | static void kvm_free_vcpus(struct kvm *kvm) | |
214 | { | |
215 | unsigned int i; | |
988a2cae | 216 | struct kvm_vcpu *vcpu; |
d329c035 | 217 | |
988a2cae GN |
218 | kvm_for_each_vcpu(i, vcpu, kvm) |
219 | kvm_arch_vcpu_destroy(vcpu); | |
220 | ||
221 | mutex_lock(&kvm->lock); | |
222 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
223 | kvm->vcpus[i] = NULL; | |
224 | ||
225 | atomic_set(&kvm->online_vcpus, 0); | |
226 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
227 | } |
228 | ||
ad8ba2cd SY |
229 | void kvm_arch_sync_events(struct kvm *kvm) |
230 | { | |
231 | } | |
232 | ||
b0c632db HC |
233 | void kvm_arch_destroy_vm(struct kvm *kvm) |
234 | { | |
d329c035 | 235 | kvm_free_vcpus(kvm); |
b0c632db | 236 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 237 | debug_unregister(kvm->arch.dbf); |
b0c632db HC |
238 | } |
239 | ||
240 | /* Section: vcpu related */ | |
241 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
242 | { | |
243 | return 0; | |
244 | } | |
245 | ||
246 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
247 | { | |
6692cef3 | 248 | /* Nothing todo */ |
b0c632db HC |
249 | } |
250 | ||
251 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
252 | { | |
253 | save_fp_regs(&vcpu->arch.host_fpregs); | |
254 | save_access_regs(vcpu->arch.host_acrs); | |
255 | vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK; | |
256 | restore_fp_regs(&vcpu->arch.guest_fpregs); | |
257 | restore_access_regs(vcpu->arch.guest_acrs); | |
b0c632db HC |
258 | } |
259 | ||
260 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
261 | { | |
262 | save_fp_regs(&vcpu->arch.guest_fpregs); | |
263 | save_access_regs(vcpu->arch.guest_acrs); | |
264 | restore_fp_regs(&vcpu->arch.host_fpregs); | |
265 | restore_access_regs(vcpu->arch.host_acrs); | |
266 | } | |
267 | ||
268 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
269 | { | |
270 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
271 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
272 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
273 | vcpu->arch.sie_block->prefix = 0UL; | |
274 | vcpu->arch.sie_block->ihcpu = 0xffff; | |
275 | vcpu->arch.sie_block->cputm = 0UL; | |
276 | vcpu->arch.sie_block->ckc = 0UL; | |
277 | vcpu->arch.sie_block->todpr = 0; | |
278 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
279 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
280 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
281 | vcpu->arch.guest_fpregs.fpc = 0; | |
282 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
283 | vcpu->arch.sie_block->gbea = 1; | |
284 | } | |
285 | ||
286 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
287 | { | |
288 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH); | |
628eb9b8 | 289 | set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests); |
fc34531d | 290 | vcpu->arch.sie_block->ecb = 6; |
b0c632db | 291 | vcpu->arch.sie_block->eca = 0xC1002001U; |
ef50f7ac | 292 | vcpu->arch.sie_block->fac = (int) (long) facilities; |
ca872302 CB |
293 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
294 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
295 | (unsigned long) vcpu); | |
296 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 297 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 298 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
299 | return 0; |
300 | } | |
301 | ||
302 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
303 | unsigned int id) | |
304 | { | |
305 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
306 | int rc = -ENOMEM; | |
307 | ||
308 | if (!vcpu) | |
309 | goto out_nomem; | |
310 | ||
180c12fb CB |
311 | vcpu->arch.sie_block = (struct kvm_s390_sie_block *) |
312 | get_zeroed_page(GFP_KERNEL); | |
b0c632db HC |
313 | |
314 | if (!vcpu->arch.sie_block) | |
315 | goto out_free_cpu; | |
316 | ||
317 | vcpu->arch.sie_block->icpua = id; | |
318 | BUG_ON(!kvm->arch.sca); | |
abf4a71e CO |
319 | if (!kvm->arch.sca->cpu[id].sda) |
320 | kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block; | |
b0c632db HC |
321 | vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32); |
322 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
fc34531d | 323 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); |
b0c632db | 324 | |
ba5c1e9b CO |
325 | spin_lock_init(&vcpu->arch.local_int.lock); |
326 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
327 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 328 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b CO |
329 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
330 | init_waitqueue_head(&vcpu->arch.local_int.wq); | |
5288fbf0 | 331 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 332 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 333 | |
b0c632db HC |
334 | rc = kvm_vcpu_init(vcpu, kvm, id); |
335 | if (rc) | |
7b06bf2f | 336 | goto out_free_sie_block; |
b0c632db HC |
337 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
338 | vcpu->arch.sie_block); | |
339 | ||
b0c632db | 340 | return vcpu; |
7b06bf2f WY |
341 | out_free_sie_block: |
342 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db HC |
343 | out_free_cpu: |
344 | kfree(vcpu); | |
345 | out_nomem: | |
346 | return ERR_PTR(rc); | |
347 | } | |
348 | ||
b0c632db HC |
349 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
350 | { | |
351 | /* kvm common code refers to this, but never calls it */ | |
352 | BUG(); | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) | |
357 | { | |
b0c632db | 358 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
359 | return 0; |
360 | } | |
361 | ||
362 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
363 | { | |
b0c632db | 364 | memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
365 | return 0; |
366 | } | |
367 | ||
368 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
369 | { | |
b0c632db | 370 | memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs)); |
b0c632db HC |
371 | return 0; |
372 | } | |
373 | ||
374 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
375 | struct kvm_sregs *sregs) | |
376 | { | |
b0c632db HC |
377 | memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs)); |
378 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); | |
b0c632db HC |
379 | return 0; |
380 | } | |
381 | ||
382 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
383 | struct kvm_sregs *sregs) | |
384 | { | |
b0c632db HC |
385 | memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs)); |
386 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); | |
b0c632db HC |
387 | return 0; |
388 | } | |
389 | ||
390 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
391 | { | |
b0c632db HC |
392 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
393 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; | |
b0c632db HC |
394 | return 0; |
395 | } | |
396 | ||
397 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
398 | { | |
b0c632db HC |
399 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
400 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
401 | return 0; |
402 | } | |
403 | ||
404 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
405 | { | |
406 | int rc = 0; | |
407 | ||
b0c632db HC |
408 | if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING) |
409 | rc = -EBUSY; | |
d7b0b5eb CO |
410 | else { |
411 | vcpu->run->psw_mask = psw.mask; | |
412 | vcpu->run->psw_addr = psw.addr; | |
413 | } | |
b0c632db HC |
414 | return rc; |
415 | } | |
416 | ||
417 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
418 | struct kvm_translation *tr) | |
419 | { | |
420 | return -EINVAL; /* not implemented yet */ | |
421 | } | |
422 | ||
d0bfb940 JK |
423 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
424 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
425 | { |
426 | return -EINVAL; /* not implemented yet */ | |
427 | } | |
428 | ||
62d9f0db MT |
429 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
430 | struct kvm_mp_state *mp_state) | |
431 | { | |
432 | return -EINVAL; /* not implemented yet */ | |
433 | } | |
434 | ||
435 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
436 | struct kvm_mp_state *mp_state) | |
437 | { | |
438 | return -EINVAL; /* not implemented yet */ | |
439 | } | |
440 | ||
b0c632db HC |
441 | static void __vcpu_run(struct kvm_vcpu *vcpu) |
442 | { | |
443 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16); | |
444 | ||
445 | if (need_resched()) | |
446 | schedule(); | |
447 | ||
71cde587 CB |
448 | if (test_thread_flag(TIF_MCCK_PENDING)) |
449 | s390_handle_mcck(); | |
450 | ||
0ff31867 CO |
451 | kvm_s390_deliver_pending_interrupts(vcpu); |
452 | ||
b0c632db HC |
453 | vcpu->arch.sie_block->icptcode = 0; |
454 | local_irq_disable(); | |
455 | kvm_guest_enter(); | |
456 | local_irq_enable(); | |
457 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", | |
458 | atomic_read(&vcpu->arch.sie_block->cpuflags)); | |
1f0d0f09 CO |
459 | if (sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs)) { |
460 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); | |
461 | kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
462 | } | |
b0c632db HC |
463 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", |
464 | vcpu->arch.sie_block->icptcode); | |
465 | local_irq_disable(); | |
466 | kvm_guest_exit(); | |
467 | local_irq_enable(); | |
468 | ||
469 | memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16); | |
470 | } | |
471 | ||
472 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
473 | { | |
8f2abe6a | 474 | int rc; |
b0c632db HC |
475 | sigset_t sigsaved; |
476 | ||
9ace903d | 477 | rerun_vcpu: |
628eb9b8 CE |
478 | if (vcpu->requests) |
479 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
480 | kvm_s390_vcpu_set_mem(vcpu); | |
481 | ||
51e4d5ab | 482 | /* verify, that memory has been registered */ |
628eb9b8 | 483 | if (!vcpu->arch.sie_block->gmslm) { |
51e4d5ab | 484 | vcpu_put(vcpu); |
628eb9b8 | 485 | VCPU_EVENT(vcpu, 3, "%s", "no memory registered to run vcpu"); |
51e4d5ab CO |
486 | return -EINVAL; |
487 | } | |
488 | ||
b0c632db HC |
489 | if (vcpu->sigset_active) |
490 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
491 | ||
492 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); | |
493 | ||
ba5c1e9b CO |
494 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
495 | ||
8f2abe6a CB |
496 | switch (kvm_run->exit_reason) { |
497 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 498 | case KVM_EXIT_UNKNOWN: |
9ace903d | 499 | case KVM_EXIT_INTR: |
8f2abe6a CB |
500 | case KVM_EXIT_S390_RESET: |
501 | break; | |
502 | default: | |
503 | BUG(); | |
504 | } | |
505 | ||
d7b0b5eb CO |
506 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
507 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
508 | ||
dab4079d | 509 | might_fault(); |
8f2abe6a CB |
510 | |
511 | do { | |
512 | __vcpu_run(vcpu); | |
8f2abe6a CB |
513 | rc = kvm_handle_sie_intercept(vcpu); |
514 | } while (!signal_pending(current) && !rc); | |
515 | ||
9ace903d CE |
516 | if (rc == SIE_INTERCEPT_RERUNVCPU) |
517 | goto rerun_vcpu; | |
518 | ||
b1d16c49 CE |
519 | if (signal_pending(current) && !rc) { |
520 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 521 | rc = -EINTR; |
b1d16c49 | 522 | } |
8f2abe6a | 523 | |
b8e660b8 | 524 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
525 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
526 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
527 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
528 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
529 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
530 | rc = 0; | |
531 | } | |
532 | ||
533 | if (rc == -EREMOTE) { | |
534 | /* intercept was handled, but userspace support is needed | |
535 | * kvm_run has been prepared by the handler */ | |
536 | rc = 0; | |
537 | } | |
b0c632db | 538 | |
d7b0b5eb CO |
539 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
540 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
541 | ||
b0c632db HC |
542 | if (vcpu->sigset_active) |
543 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
544 | ||
b0c632db | 545 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 546 | return rc; |
b0c632db HC |
547 | } |
548 | ||
549 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from, | |
550 | unsigned long n, int prefix) | |
551 | { | |
552 | if (prefix) | |
553 | return copy_to_guest(vcpu, guestdest, from, n); | |
554 | else | |
555 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
556 | } | |
557 | ||
558 | /* | |
559 | * store status at address | |
560 | * we use have two special cases: | |
561 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
562 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
563 | */ | |
971eb77f | 564 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db HC |
565 | { |
566 | const unsigned char archmode = 1; | |
567 | int prefix; | |
568 | ||
569 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
570 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
571 | return -EFAULT; | |
572 | addr = SAVE_AREA_BASE; | |
573 | prefix = 0; | |
574 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
575 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
576 | return -EFAULT; | |
577 | addr = SAVE_AREA_BASE; | |
578 | prefix = 1; | |
579 | } else | |
580 | prefix = 0; | |
581 | ||
f64ca217 | 582 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
583 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
584 | return -EFAULT; | |
585 | ||
f64ca217 | 586 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
b0c632db HC |
587 | vcpu->arch.guest_gprs, 128, prefix)) |
588 | return -EFAULT; | |
589 | ||
f64ca217 | 590 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
591 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
592 | return -EFAULT; | |
593 | ||
f64ca217 | 594 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
595 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
596 | return -EFAULT; | |
597 | ||
598 | if (__guestcopy(vcpu, | |
f64ca217 | 599 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
600 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
601 | return -EFAULT; | |
602 | ||
f64ca217 | 603 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
604 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
605 | return -EFAULT; | |
606 | ||
f64ca217 | 607 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
608 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
609 | return -EFAULT; | |
610 | ||
f64ca217 | 611 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
b0c632db HC |
612 | &vcpu->arch.sie_block->ckc, 8, prefix)) |
613 | return -EFAULT; | |
614 | ||
f64ca217 | 615 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
b0c632db HC |
616 | &vcpu->arch.guest_acrs, 64, prefix)) |
617 | return -EFAULT; | |
618 | ||
619 | if (__guestcopy(vcpu, | |
f64ca217 | 620 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
621 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
622 | return -EFAULT; | |
623 | return 0; | |
624 | } | |
625 | ||
b0c632db HC |
626 | long kvm_arch_vcpu_ioctl(struct file *filp, |
627 | unsigned int ioctl, unsigned long arg) | |
628 | { | |
629 | struct kvm_vcpu *vcpu = filp->private_data; | |
630 | void __user *argp = (void __user *)arg; | |
bc923cc9 | 631 | long r; |
b0c632db | 632 | |
93736624 AK |
633 | switch (ioctl) { |
634 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
635 | struct kvm_s390_interrupt s390int; |
636 | ||
93736624 | 637 | r = -EFAULT; |
ba5c1e9b | 638 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
639 | break; |
640 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
641 | break; | |
ba5c1e9b | 642 | } |
b0c632db | 643 | case KVM_S390_STORE_STATUS: |
bc923cc9 AK |
644 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
645 | break; | |
b0c632db HC |
646 | case KVM_S390_SET_INITIAL_PSW: { |
647 | psw_t psw; | |
648 | ||
bc923cc9 | 649 | r = -EFAULT; |
b0c632db | 650 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
651 | break; |
652 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
653 | break; | |
b0c632db HC |
654 | } |
655 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
656 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
657 | break; | |
b0c632db | 658 | default: |
bc923cc9 | 659 | r = -EINVAL; |
b0c632db | 660 | } |
bc923cc9 | 661 | return r; |
b0c632db HC |
662 | } |
663 | ||
664 | /* Section: memory related */ | |
f7784b8e MT |
665 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
666 | struct kvm_memory_slot *memslot, | |
667 | struct kvm_memory_slot old, | |
668 | struct kvm_userspace_memory_region *mem, | |
669 | int user_alloc) | |
b0c632db HC |
670 | { |
671 | /* A few sanity checks. We can have exactly one memory slot which has | |
672 | to start at guest virtual zero and which has to be located at a | |
673 | page boundary in userland and which has to end at a page boundary. | |
674 | The memory in userland is ok to be fragmented into various different | |
675 | vmas. It is okay to mmap() and munmap() stuff in this slot after | |
676 | doing this call at any time */ | |
677 | ||
628eb9b8 | 678 | if (mem->slot) |
b0c632db HC |
679 | return -EINVAL; |
680 | ||
681 | if (mem->guest_phys_addr) | |
682 | return -EINVAL; | |
683 | ||
684 | if (mem->userspace_addr & (PAGE_SIZE - 1)) | |
685 | return -EINVAL; | |
686 | ||
687 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
688 | return -EINVAL; | |
689 | ||
2668dab7 CO |
690 | if (!user_alloc) |
691 | return -EINVAL; | |
692 | ||
f7784b8e MT |
693 | return 0; |
694 | } | |
695 | ||
696 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
697 | struct kvm_userspace_memory_region *mem, | |
698 | struct kvm_memory_slot old, | |
699 | int user_alloc) | |
700 | { | |
701 | int i; | |
702 | struct kvm_vcpu *vcpu; | |
703 | ||
628eb9b8 | 704 | /* request update of sie control block for all available vcpus */ |
988a2cae GN |
705 | kvm_for_each_vcpu(i, vcpu, kvm) { |
706 | if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
707 | continue; | |
708 | kvm_s390_inject_sigp_stop(vcpu, ACTION_RELOADVCPU_ON_STOP); | |
2668dab7 | 709 | } |
b0c632db HC |
710 | } |
711 | ||
34d4cb8f MT |
712 | void kvm_arch_flush_shadow(struct kvm *kvm) |
713 | { | |
714 | } | |
715 | ||
b0c632db HC |
716 | static int __init kvm_s390_init(void) |
717 | { | |
ef50f7ac | 718 | int ret; |
0ee75bea | 719 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
720 | if (ret) |
721 | return ret; | |
722 | ||
723 | /* | |
724 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 725 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
726 | * only set facilities that are known to work in KVM. |
727 | */ | |
c2f0e8c8 | 728 | facilities = (unsigned long long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
ef50f7ac CB |
729 | if (!facilities) { |
730 | kvm_exit(); | |
731 | return -ENOMEM; | |
732 | } | |
14375bc4 | 733 | memcpy(facilities, S390_lowcore.stfle_fac_list, 16); |
6d00d00b | 734 | facilities[0] &= 0xff00fff3f47c0000ULL; |
9950f8be | 735 | facilities[1] &= 0x201c000000000000ULL; |
ef50f7ac | 736 | return 0; |
b0c632db HC |
737 | } |
738 | ||
739 | static void __exit kvm_s390_exit(void) | |
740 | { | |
ef50f7ac | 741 | free_page((unsigned long) facilities); |
b0c632db HC |
742 | kvm_exit(); |
743 | } | |
744 | ||
745 | module_init(kvm_s390_init); | |
746 | module_exit(kvm_s390_exit); |