Commit | Line | Data |
---|---|---|
b0c632db | 1 | /* |
a53c8fab | 2 | * hosting zSeries kernel virtual machines |
b0c632db | 3 | * |
a53c8fab | 4 | * Copyright IBM Corp. 2008, 2009 |
b0c632db HC |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License (version 2 only) | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * Author(s): Carsten Otte <cotte@de.ibm.com> | |
11 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
12 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
628eb9b8 | 13 | * Christian Ehrhardt <ehrhardt@de.ibm.com> |
b0c632db HC |
14 | */ |
15 | ||
16 | #include <linux/compiler.h> | |
17 | #include <linux/err.h> | |
18 | #include <linux/fs.h> | |
ca872302 | 19 | #include <linux/hrtimer.h> |
b0c632db HC |
20 | #include <linux/init.h> |
21 | #include <linux/kvm.h> | |
22 | #include <linux/kvm_host.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/slab.h> | |
ba5c1e9b | 25 | #include <linux/timer.h> |
cbb870c8 | 26 | #include <asm/asm-offsets.h> |
b0c632db HC |
27 | #include <asm/lowcore.h> |
28 | #include <asm/pgtable.h> | |
f5daba1d | 29 | #include <asm/nmi.h> |
a0616cde | 30 | #include <asm/switch_to.h> |
78c4b59f | 31 | #include <asm/facility.h> |
1526bf9c | 32 | #include <asm/sclp.h> |
8f2abe6a | 33 | #include "kvm-s390.h" |
b0c632db HC |
34 | #include "gaccess.h" |
35 | ||
5786fffa CH |
36 | #define CREATE_TRACE_POINTS |
37 | #include "trace.h" | |
ade38c31 | 38 | #include "trace-s390.h" |
5786fffa | 39 | |
b0c632db HC |
40 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU |
41 | ||
42 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
43 | { "userspace_handled", VCPU_STAT(exit_userspace) }, | |
0eaeafa1 | 44 | { "exit_null", VCPU_STAT(exit_null) }, |
8f2abe6a CB |
45 | { "exit_validity", VCPU_STAT(exit_validity) }, |
46 | { "exit_stop_request", VCPU_STAT(exit_stop_request) }, | |
47 | { "exit_external_request", VCPU_STAT(exit_external_request) }, | |
48 | { "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) }, | |
ba5c1e9b CO |
49 | { "exit_instruction", VCPU_STAT(exit_instruction) }, |
50 | { "exit_program_interruption", VCPU_STAT(exit_program_interruption) }, | |
51 | { "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) }, | |
f5e10b09 | 52 | { "instruction_lctlg", VCPU_STAT(instruction_lctlg) }, |
ba5c1e9b CO |
53 | { "instruction_lctl", VCPU_STAT(instruction_lctl) }, |
54 | { "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) }, | |
7697e71f | 55 | { "deliver_external_call", VCPU_STAT(deliver_external_call) }, |
ba5c1e9b CO |
56 | { "deliver_service_signal", VCPU_STAT(deliver_service_signal) }, |
57 | { "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) }, | |
58 | { "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) }, | |
59 | { "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) }, | |
60 | { "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) }, | |
61 | { "deliver_program_interruption", VCPU_STAT(deliver_program_int) }, | |
62 | { "exit_wait_state", VCPU_STAT(exit_wait_state) }, | |
69d0d3a3 | 63 | { "instruction_pfmf", VCPU_STAT(instruction_pfmf) }, |
453423dc CB |
64 | { "instruction_stidp", VCPU_STAT(instruction_stidp) }, |
65 | { "instruction_spx", VCPU_STAT(instruction_spx) }, | |
66 | { "instruction_stpx", VCPU_STAT(instruction_stpx) }, | |
67 | { "instruction_stap", VCPU_STAT(instruction_stap) }, | |
68 | { "instruction_storage_key", VCPU_STAT(instruction_storage_key) }, | |
69 | { "instruction_stsch", VCPU_STAT(instruction_stsch) }, | |
70 | { "instruction_chsc", VCPU_STAT(instruction_chsc) }, | |
71 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, | |
72 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 73 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 74 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 75 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 76 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
77 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
78 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
79 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
80 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
81 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 82 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 83 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 84 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
85 | { NULL } |
86 | }; | |
87 | ||
78c4b59f | 88 | unsigned long *vfacilities; |
2c70fe44 | 89 | static struct gmap_notifier gmap_notifier; |
b0c632db | 90 | |
78c4b59f MM |
91 | /* test availability of vfacility */ |
92 | static inline int test_vfacility(unsigned long nr) | |
93 | { | |
94 | return __test_facility(nr, (void *) vfacilities); | |
95 | } | |
96 | ||
b0c632db | 97 | /* Section: not file related */ |
10474ae8 | 98 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
99 | { |
100 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 101 | return 0; |
b0c632db HC |
102 | } |
103 | ||
104 | void kvm_arch_hardware_disable(void *garbage) | |
105 | { | |
106 | } | |
107 | ||
2c70fe44 CB |
108 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
109 | ||
b0c632db HC |
110 | int kvm_arch_hardware_setup(void) |
111 | { | |
2c70fe44 CB |
112 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
113 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
114 | return 0; |
115 | } | |
116 | ||
117 | void kvm_arch_hardware_unsetup(void) | |
118 | { | |
2c70fe44 | 119 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
120 | } |
121 | ||
122 | void kvm_arch_check_processor_compat(void *rtn) | |
123 | { | |
124 | } | |
125 | ||
126 | int kvm_arch_init(void *opaque) | |
127 | { | |
128 | return 0; | |
129 | } | |
130 | ||
131 | void kvm_arch_exit(void) | |
132 | { | |
133 | } | |
134 | ||
135 | /* Section: device related */ | |
136 | long kvm_arch_dev_ioctl(struct file *filp, | |
137 | unsigned int ioctl, unsigned long arg) | |
138 | { | |
139 | if (ioctl == KVM_S390_ENABLE_SIE) | |
140 | return s390_enable_sie(); | |
141 | return -EINVAL; | |
142 | } | |
143 | ||
144 | int kvm_dev_ioctl_check_extension(long ext) | |
145 | { | |
d7b0b5eb CO |
146 | int r; |
147 | ||
2bd0ac4e | 148 | switch (ext) { |
d7b0b5eb | 149 | case KVM_CAP_S390_PSW: |
b6cf8788 | 150 | case KVM_CAP_S390_GMAP: |
52e16b18 | 151 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
152 | #ifdef CONFIG_KVM_S390_UCONTROL |
153 | case KVM_CAP_S390_UCONTROL: | |
154 | #endif | |
60b413c9 | 155 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 156 | case KVM_CAP_ONE_REG: |
d6712df9 | 157 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 158 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 159 | case KVM_CAP_IOEVENTFD: |
d7b0b5eb CO |
160 | r = 1; |
161 | break; | |
e726b1bd CB |
162 | case KVM_CAP_NR_VCPUS: |
163 | case KVM_CAP_MAX_VCPUS: | |
164 | r = KVM_MAX_VCPUS; | |
165 | break; | |
e1e2e605 NW |
166 | case KVM_CAP_NR_MEMSLOTS: |
167 | r = KVM_USER_MEM_SLOTS; | |
168 | break; | |
1526bf9c | 169 | case KVM_CAP_S390_COW: |
abf09bed | 170 | r = MACHINE_HAS_ESOP; |
1526bf9c | 171 | break; |
2bd0ac4e | 172 | default: |
d7b0b5eb | 173 | r = 0; |
2bd0ac4e | 174 | } |
d7b0b5eb | 175 | return r; |
b0c632db HC |
176 | } |
177 | ||
178 | /* Section: vm related */ | |
179 | /* | |
180 | * Get (and clear) the dirty memory log for a memory slot. | |
181 | */ | |
182 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
183 | struct kvm_dirty_log *log) | |
184 | { | |
185 | return 0; | |
186 | } | |
187 | ||
188 | long kvm_arch_vm_ioctl(struct file *filp, | |
189 | unsigned int ioctl, unsigned long arg) | |
190 | { | |
191 | struct kvm *kvm = filp->private_data; | |
192 | void __user *argp = (void __user *)arg; | |
193 | int r; | |
194 | ||
195 | switch (ioctl) { | |
ba5c1e9b CO |
196 | case KVM_S390_INTERRUPT: { |
197 | struct kvm_s390_interrupt s390int; | |
198 | ||
199 | r = -EFAULT; | |
200 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
201 | break; | |
202 | r = kvm_s390_inject_vm(kvm, &s390int); | |
203 | break; | |
204 | } | |
b0c632db | 205 | default: |
367e1319 | 206 | r = -ENOTTY; |
b0c632db HC |
207 | } |
208 | ||
209 | return r; | |
210 | } | |
211 | ||
e08b9637 | 212 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 213 | { |
b0c632db HC |
214 | int rc; |
215 | char debug_name[16]; | |
216 | ||
e08b9637 CO |
217 | rc = -EINVAL; |
218 | #ifdef CONFIG_KVM_S390_UCONTROL | |
219 | if (type & ~KVM_VM_S390_UCONTROL) | |
220 | goto out_err; | |
221 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
222 | goto out_err; | |
223 | #else | |
224 | if (type) | |
225 | goto out_err; | |
226 | #endif | |
227 | ||
b0c632db HC |
228 | rc = s390_enable_sie(); |
229 | if (rc) | |
d89f5eff | 230 | goto out_err; |
b0c632db | 231 | |
b290411a CO |
232 | rc = -ENOMEM; |
233 | ||
b0c632db HC |
234 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
235 | if (!kvm->arch.sca) | |
d89f5eff | 236 | goto out_err; |
b0c632db HC |
237 | |
238 | sprintf(debug_name, "kvm-%u", current->pid); | |
239 | ||
240 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
241 | if (!kvm->arch.dbf) | |
242 | goto out_nodbf; | |
243 | ||
ba5c1e9b CO |
244 | spin_lock_init(&kvm->arch.float_int.lock); |
245 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
246 | ||
b0c632db HC |
247 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
248 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
249 | ||
e08b9637 CO |
250 | if (type & KVM_VM_S390_UCONTROL) { |
251 | kvm->arch.gmap = NULL; | |
252 | } else { | |
253 | kvm->arch.gmap = gmap_alloc(current->mm); | |
254 | if (!kvm->arch.gmap) | |
255 | goto out_nogmap; | |
2c70fe44 | 256 | kvm->arch.gmap->private = kvm; |
e08b9637 | 257 | } |
fa6b7fe9 CH |
258 | |
259 | kvm->arch.css_support = 0; | |
260 | ||
d89f5eff | 261 | return 0; |
598841ca CO |
262 | out_nogmap: |
263 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
264 | out_nodbf: |
265 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
266 | out_err: |
267 | return rc; | |
b0c632db HC |
268 | } |
269 | ||
d329c035 CB |
270 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
271 | { | |
272 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 273 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
58f9460b CO |
274 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
275 | clear_bit(63 - vcpu->vcpu_id, | |
276 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
277 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
278 | (__u64) vcpu->arch.sie_block) | |
279 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
280 | } | |
abf4a71e | 281 | smp_mb(); |
27e0393f CO |
282 | |
283 | if (kvm_is_ucontrol(vcpu->kvm)) | |
284 | gmap_free(vcpu->arch.gmap); | |
285 | ||
d329c035 | 286 | free_page((unsigned long)(vcpu->arch.sie_block)); |
6692cef3 | 287 | kvm_vcpu_uninit(vcpu); |
b110feaf | 288 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
289 | } |
290 | ||
291 | static void kvm_free_vcpus(struct kvm *kvm) | |
292 | { | |
293 | unsigned int i; | |
988a2cae | 294 | struct kvm_vcpu *vcpu; |
d329c035 | 295 | |
988a2cae GN |
296 | kvm_for_each_vcpu(i, vcpu, kvm) |
297 | kvm_arch_vcpu_destroy(vcpu); | |
298 | ||
299 | mutex_lock(&kvm->lock); | |
300 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
301 | kvm->vcpus[i] = NULL; | |
302 | ||
303 | atomic_set(&kvm->online_vcpus, 0); | |
304 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
305 | } |
306 | ||
ad8ba2cd SY |
307 | void kvm_arch_sync_events(struct kvm *kvm) |
308 | { | |
309 | } | |
310 | ||
b0c632db HC |
311 | void kvm_arch_destroy_vm(struct kvm *kvm) |
312 | { | |
d329c035 | 313 | kvm_free_vcpus(kvm); |
b0c632db | 314 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 315 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
316 | if (!kvm_is_ucontrol(kvm)) |
317 | gmap_free(kvm->arch.gmap); | |
b0c632db HC |
318 | } |
319 | ||
320 | /* Section: vcpu related */ | |
321 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
322 | { | |
27e0393f CO |
323 | if (kvm_is_ucontrol(vcpu->kvm)) { |
324 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
325 | if (!vcpu->arch.gmap) | |
326 | return -ENOMEM; | |
2c70fe44 | 327 | vcpu->arch.gmap->private = vcpu->kvm; |
27e0393f CO |
328 | return 0; |
329 | } | |
330 | ||
598841ca | 331 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
332 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
333 | KVM_SYNC_GPRS | | |
9eed0735 CB |
334 | KVM_SYNC_ACRS | |
335 | KVM_SYNC_CRS; | |
b0c632db HC |
336 | return 0; |
337 | } | |
338 | ||
339 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
340 | { | |
6692cef3 | 341 | /* Nothing todo */ |
b0c632db HC |
342 | } |
343 | ||
344 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
345 | { | |
4725c860 MS |
346 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
347 | save_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db | 348 | save_access_regs(vcpu->arch.host_acrs); |
4725c860 MS |
349 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
350 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 351 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 352 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 353 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
354 | } |
355 | ||
356 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
357 | { | |
9e6dabef | 358 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 359 | gmap_disable(vcpu->arch.gmap); |
4725c860 MS |
360 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
361 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 362 | save_access_regs(vcpu->run->s.regs.acrs); |
4725c860 MS |
363 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
364 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db HC |
365 | restore_access_regs(vcpu->arch.host_acrs); |
366 | } | |
367 | ||
368 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
369 | { | |
370 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
371 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
372 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 373 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
374 | vcpu->arch.sie_block->cputm = 0UL; |
375 | vcpu->arch.sie_block->ckc = 0UL; | |
376 | vcpu->arch.sie_block->todpr = 0; | |
377 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
378 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
379 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
380 | vcpu->arch.guest_fpregs.fpc = 0; | |
381 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
382 | vcpu->arch.sie_block->gbea = 1; | |
61bde82c | 383 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
384 | } |
385 | ||
42897d86 MT |
386 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
387 | { | |
388 | return 0; | |
389 | } | |
390 | ||
b0c632db HC |
391 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
392 | { | |
9e6dabef CH |
393 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
394 | CPUSTAT_SM | | |
69d0d3a3 CB |
395 | CPUSTAT_STOPPED | |
396 | CPUSTAT_GED); | |
fc34531d | 397 | vcpu->arch.sie_block->ecb = 6; |
7feb6bb8 MM |
398 | if (test_vfacility(50) && test_vfacility(73)) |
399 | vcpu->arch.sie_block->ecb |= 0x10; | |
400 | ||
69d0d3a3 | 401 | vcpu->arch.sie_block->ecb2 = 8; |
b0c632db | 402 | vcpu->arch.sie_block->eca = 0xC1002001U; |
78c4b59f | 403 | vcpu->arch.sie_block->fac = (int) (long) vfacilities; |
ca872302 CB |
404 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
405 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
406 | (unsigned long) vcpu); | |
407 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 408 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 409 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
410 | return 0; |
411 | } | |
412 | ||
413 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
414 | unsigned int id) | |
415 | { | |
4d47555a | 416 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 417 | struct sie_page *sie_page; |
4d47555a CO |
418 | int rc = -EINVAL; |
419 | ||
420 | if (id >= KVM_MAX_VCPUS) | |
421 | goto out; | |
422 | ||
423 | rc = -ENOMEM; | |
b0c632db | 424 | |
b110feaf | 425 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 426 | if (!vcpu) |
4d47555a | 427 | goto out; |
b0c632db | 428 | |
7feb6bb8 MM |
429 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
430 | if (!sie_page) | |
b0c632db HC |
431 | goto out_free_cpu; |
432 | ||
7feb6bb8 MM |
433 | vcpu->arch.sie_block = &sie_page->sie_block; |
434 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
435 | ||
b0c632db | 436 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
437 | if (!kvm_is_ucontrol(kvm)) { |
438 | if (!kvm->arch.sca) { | |
439 | WARN_ON_ONCE(1); | |
440 | goto out_free_cpu; | |
441 | } | |
442 | if (!kvm->arch.sca->cpu[id].sda) | |
443 | kvm->arch.sca->cpu[id].sda = | |
444 | (__u64) vcpu->arch.sie_block; | |
445 | vcpu->arch.sie_block->scaoh = | |
446 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
447 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
448 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
449 | } | |
b0c632db | 450 | |
ba5c1e9b CO |
451 | spin_lock_init(&vcpu->arch.local_int.lock); |
452 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
453 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
b037a4f3 | 454 | spin_lock(&kvm->arch.float_int.lock); |
ba5c1e9b | 455 | kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int; |
d0321a24 | 456 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 457 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
b037a4f3 | 458 | spin_unlock(&kvm->arch.float_int.lock); |
ba5c1e9b | 459 | |
b0c632db HC |
460 | rc = kvm_vcpu_init(vcpu, kvm, id); |
461 | if (rc) | |
7b06bf2f | 462 | goto out_free_sie_block; |
b0c632db HC |
463 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
464 | vcpu->arch.sie_block); | |
ade38c31 | 465 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 466 | |
b0c632db | 467 | return vcpu; |
7b06bf2f WY |
468 | out_free_sie_block: |
469 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 470 | out_free_cpu: |
b110feaf | 471 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 472 | out: |
b0c632db HC |
473 | return ERR_PTR(rc); |
474 | } | |
475 | ||
b0c632db HC |
476 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
477 | { | |
478 | /* kvm common code refers to this, but never calls it */ | |
479 | BUG(); | |
480 | return 0; | |
481 | } | |
482 | ||
49b99e1e CB |
483 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
484 | { | |
485 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
486 | } | |
487 | ||
488 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
489 | { | |
490 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
491 | } | |
492 | ||
493 | /* | |
494 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
495 | * If the CPU is not running (e.g. waiting as idle) the function will | |
496 | * return immediately. */ | |
497 | void exit_sie(struct kvm_vcpu *vcpu) | |
498 | { | |
499 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
500 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
501 | cpu_relax(); | |
502 | } | |
503 | ||
504 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
505 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
506 | { | |
507 | s390_vcpu_block(vcpu); | |
508 | exit_sie(vcpu); | |
509 | } | |
510 | ||
2c70fe44 CB |
511 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
512 | { | |
513 | int i; | |
514 | struct kvm *kvm = gmap->private; | |
515 | struct kvm_vcpu *vcpu; | |
516 | ||
517 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
518 | /* match against both prefix pages */ | |
519 | if (vcpu->arch.sie_block->prefix == (address & ~0x1000UL)) { | |
520 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); | |
521 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
522 | exit_sie_sync(vcpu); | |
523 | } | |
524 | } | |
525 | } | |
526 | ||
b6d33834 CD |
527 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
528 | { | |
529 | /* kvm common code refers to this, but never calls it */ | |
530 | BUG(); | |
531 | return 0; | |
532 | } | |
533 | ||
14eebd91 CO |
534 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
535 | struct kvm_one_reg *reg) | |
536 | { | |
537 | int r = -EINVAL; | |
538 | ||
539 | switch (reg->id) { | |
29b7c71b CO |
540 | case KVM_REG_S390_TODPR: |
541 | r = put_user(vcpu->arch.sie_block->todpr, | |
542 | (u32 __user *)reg->addr); | |
543 | break; | |
544 | case KVM_REG_S390_EPOCHDIFF: | |
545 | r = put_user(vcpu->arch.sie_block->epoch, | |
546 | (u64 __user *)reg->addr); | |
547 | break; | |
46a6dd1c J |
548 | case KVM_REG_S390_CPU_TIMER: |
549 | r = put_user(vcpu->arch.sie_block->cputm, | |
550 | (u64 __user *)reg->addr); | |
551 | break; | |
552 | case KVM_REG_S390_CLOCK_COMP: | |
553 | r = put_user(vcpu->arch.sie_block->ckc, | |
554 | (u64 __user *)reg->addr); | |
555 | break; | |
14eebd91 CO |
556 | default: |
557 | break; | |
558 | } | |
559 | ||
560 | return r; | |
561 | } | |
562 | ||
563 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
564 | struct kvm_one_reg *reg) | |
565 | { | |
566 | int r = -EINVAL; | |
567 | ||
568 | switch (reg->id) { | |
29b7c71b CO |
569 | case KVM_REG_S390_TODPR: |
570 | r = get_user(vcpu->arch.sie_block->todpr, | |
571 | (u32 __user *)reg->addr); | |
572 | break; | |
573 | case KVM_REG_S390_EPOCHDIFF: | |
574 | r = get_user(vcpu->arch.sie_block->epoch, | |
575 | (u64 __user *)reg->addr); | |
576 | break; | |
46a6dd1c J |
577 | case KVM_REG_S390_CPU_TIMER: |
578 | r = get_user(vcpu->arch.sie_block->cputm, | |
579 | (u64 __user *)reg->addr); | |
580 | break; | |
581 | case KVM_REG_S390_CLOCK_COMP: | |
582 | r = get_user(vcpu->arch.sie_block->ckc, | |
583 | (u64 __user *)reg->addr); | |
584 | break; | |
14eebd91 CO |
585 | default: |
586 | break; | |
587 | } | |
588 | ||
589 | return r; | |
590 | } | |
b6d33834 | 591 | |
b0c632db HC |
592 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
593 | { | |
b0c632db | 594 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
595 | return 0; |
596 | } | |
597 | ||
598 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
599 | { | |
5a32c1af | 600 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
601 | return 0; |
602 | } | |
603 | ||
604 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
605 | { | |
5a32c1af | 606 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
607 | return 0; |
608 | } | |
609 | ||
610 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
611 | struct kvm_sregs *sregs) | |
612 | { | |
59674c1a | 613 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 614 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 615 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
616 | return 0; |
617 | } | |
618 | ||
619 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
620 | struct kvm_sregs *sregs) | |
621 | { | |
59674c1a | 622 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 623 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
624 | return 0; |
625 | } | |
626 | ||
627 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
628 | { | |
4725c860 MS |
629 | if (test_fp_ctl(fpu->fpc)) |
630 | return -EINVAL; | |
b0c632db | 631 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 MS |
632 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
633 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
634 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
b0c632db HC |
635 | return 0; |
636 | } | |
637 | ||
638 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
639 | { | |
b0c632db HC |
640 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
641 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
642 | return 0; |
643 | } | |
644 | ||
645 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
646 | { | |
647 | int rc = 0; | |
648 | ||
9e6dabef | 649 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 650 | rc = -EBUSY; |
d7b0b5eb CO |
651 | else { |
652 | vcpu->run->psw_mask = psw.mask; | |
653 | vcpu->run->psw_addr = psw.addr; | |
654 | } | |
b0c632db HC |
655 | return rc; |
656 | } | |
657 | ||
658 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
659 | struct kvm_translation *tr) | |
660 | { | |
661 | return -EINVAL; /* not implemented yet */ | |
662 | } | |
663 | ||
d0bfb940 JK |
664 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
665 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
666 | { |
667 | return -EINVAL; /* not implemented yet */ | |
668 | } | |
669 | ||
62d9f0db MT |
670 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
671 | struct kvm_mp_state *mp_state) | |
672 | { | |
673 | return -EINVAL; /* not implemented yet */ | |
674 | } | |
675 | ||
676 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
677 | struct kvm_mp_state *mp_state) | |
678 | { | |
679 | return -EINVAL; /* not implemented yet */ | |
680 | } | |
681 | ||
2c70fe44 CB |
682 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
683 | { | |
684 | /* | |
685 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
686 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
687 | * This ensures that the ipte instruction for this request has | |
688 | * already finished. We might race against a second unmapper that | |
689 | * wants to set the blocking bit. Lets just retry the request loop. | |
690 | */ | |
691 | while (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { | |
692 | int rc; | |
693 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
694 | vcpu->arch.sie_block->prefix, | |
695 | PAGE_SIZE * 2); | |
696 | if (rc) | |
697 | return rc; | |
698 | s390_vcpu_unblock(vcpu); | |
699 | } | |
700 | return 0; | |
701 | } | |
702 | ||
3fb4c40f | 703 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 704 | { |
3fb4c40f | 705 | int rc, cpuflags; |
e168bf8d | 706 | |
5a32c1af | 707 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
708 | |
709 | if (need_resched()) | |
710 | schedule(); | |
711 | ||
71cde587 CB |
712 | if (test_thread_flag(TIF_MCCK_PENDING)) |
713 | s390_handle_mcck(); | |
714 | ||
d6b6d166 CO |
715 | if (!kvm_is_ucontrol(vcpu->kvm)) |
716 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 717 | |
2c70fe44 CB |
718 | rc = kvm_s390_handle_requests(vcpu); |
719 | if (rc) | |
720 | return rc; | |
721 | ||
b0c632db | 722 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
723 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
724 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
725 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 726 | |
3fb4c40f TH |
727 | return 0; |
728 | } | |
729 | ||
730 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) | |
731 | { | |
732 | int rc; | |
2b29a9fd DD |
733 | |
734 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
735 | vcpu->arch.sie_block->icptcode); | |
736 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
737 | ||
3fb4c40f | 738 | if (exit_reason >= 0) { |
7c470539 | 739 | rc = 0; |
210b1607 TH |
740 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
741 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
742 | vcpu->run->s390_ucontrol.trans_exc_code = | |
743 | current->thread.gmap_addr; | |
744 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
745 | rc = -EREMOTE; | |
1f0d0f09 | 746 | } |
b0c632db | 747 | |
5a32c1af | 748 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 749 | |
a76ccff6 TH |
750 | if (rc == 0) { |
751 | if (kvm_is_ucontrol(vcpu->kvm)) | |
752 | rc = -EOPNOTSUPP; | |
753 | else | |
754 | rc = kvm_handle_sie_intercept(vcpu); | |
755 | } | |
756 | ||
3fb4c40f TH |
757 | return rc; |
758 | } | |
759 | ||
760 | static int __vcpu_run(struct kvm_vcpu *vcpu) | |
761 | { | |
762 | int rc, exit_reason; | |
763 | ||
800c1065 TH |
764 | /* |
765 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
766 | * ning the guest), so that memslots (and other stuff) are protected | |
767 | */ | |
768 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
769 | ||
a76ccff6 TH |
770 | do { |
771 | rc = vcpu_pre_run(vcpu); | |
772 | if (rc) | |
773 | break; | |
3fb4c40f | 774 | |
800c1065 | 775 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
776 | /* |
777 | * As PF_VCPU will be used in fault handler, between | |
778 | * guest_enter and guest_exit should be no uaccess. | |
779 | */ | |
780 | preempt_disable(); | |
781 | kvm_guest_enter(); | |
782 | preempt_enable(); | |
783 | exit_reason = sie64a(vcpu->arch.sie_block, | |
784 | vcpu->run->s.regs.gprs); | |
785 | kvm_guest_exit(); | |
800c1065 | 786 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
787 | |
788 | rc = vcpu_post_run(vcpu, exit_reason); | |
789 | } while (!signal_pending(current) && !rc); | |
3fb4c40f | 790 | |
800c1065 | 791 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 792 | return rc; |
b0c632db HC |
793 | } |
794 | ||
795 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
796 | { | |
8f2abe6a | 797 | int rc; |
b0c632db HC |
798 | sigset_t sigsaved; |
799 | ||
b0c632db HC |
800 | if (vcpu->sigset_active) |
801 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
802 | ||
9e6dabef | 803 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 804 | |
ba5c1e9b CO |
805 | BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL); |
806 | ||
8f2abe6a CB |
807 | switch (kvm_run->exit_reason) { |
808 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 809 | case KVM_EXIT_UNKNOWN: |
9ace903d | 810 | case KVM_EXIT_INTR: |
8f2abe6a | 811 | case KVM_EXIT_S390_RESET: |
e168bf8d | 812 | case KVM_EXIT_S390_UCONTROL: |
fa6b7fe9 | 813 | case KVM_EXIT_S390_TSCH: |
8f2abe6a CB |
814 | break; |
815 | default: | |
816 | BUG(); | |
817 | } | |
818 | ||
d7b0b5eb CO |
819 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
820 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
60b413c9 CB |
821 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
822 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; | |
823 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
824 | } | |
9eed0735 CB |
825 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
826 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; | |
827 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
828 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
829 | } | |
d7b0b5eb | 830 | |
dab4079d | 831 | might_fault(); |
a76ccff6 | 832 | rc = __vcpu_run(vcpu); |
9ace903d | 833 | |
b1d16c49 CE |
834 | if (signal_pending(current) && !rc) { |
835 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 836 | rc = -EINTR; |
b1d16c49 | 837 | } |
8f2abe6a | 838 | |
b8e660b8 | 839 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
840 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
841 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
842 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
843 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
844 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
845 | rc = 0; | |
846 | } | |
847 | ||
848 | if (rc == -EREMOTE) { | |
849 | /* intercept was handled, but userspace support is needed | |
850 | * kvm_run has been prepared by the handler */ | |
851 | rc = 0; | |
852 | } | |
b0c632db | 853 | |
d7b0b5eb CO |
854 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
855 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
60b413c9 | 856 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
9eed0735 | 857 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
d7b0b5eb | 858 | |
b0c632db HC |
859 | if (vcpu->sigset_active) |
860 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
861 | ||
b0c632db | 862 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 863 | return rc; |
b0c632db HC |
864 | } |
865 | ||
092670cd | 866 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
867 | unsigned long n, int prefix) |
868 | { | |
869 | if (prefix) | |
870 | return copy_to_guest(vcpu, guestdest, from, n); | |
871 | else | |
872 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
873 | } | |
874 | ||
875 | /* | |
876 | * store status at address | |
877 | * we use have two special cases: | |
878 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
879 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
880 | */ | |
e879892c | 881 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 882 | { |
092670cd | 883 | unsigned char archmode = 1; |
b0c632db | 884 | int prefix; |
178bd789 | 885 | u64 clkcomp; |
b0c632db HC |
886 | |
887 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
888 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
889 | return -EFAULT; | |
890 | addr = SAVE_AREA_BASE; | |
891 | prefix = 0; | |
892 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
893 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
894 | return -EFAULT; | |
895 | addr = SAVE_AREA_BASE; | |
896 | prefix = 1; | |
897 | } else | |
898 | prefix = 0; | |
899 | ||
f64ca217 | 900 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
901 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
902 | return -EFAULT; | |
903 | ||
f64ca217 | 904 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
5a32c1af | 905 | vcpu->run->s.regs.gprs, 128, prefix)) |
b0c632db HC |
906 | return -EFAULT; |
907 | ||
f64ca217 | 908 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
909 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
910 | return -EFAULT; | |
911 | ||
f64ca217 | 912 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
913 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
914 | return -EFAULT; | |
915 | ||
916 | if (__guestcopy(vcpu, | |
f64ca217 | 917 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
918 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
919 | return -EFAULT; | |
920 | ||
f64ca217 | 921 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
922 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
923 | return -EFAULT; | |
924 | ||
f64ca217 | 925 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
926 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
927 | return -EFAULT; | |
928 | ||
178bd789 | 929 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
f64ca217 | 930 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
178bd789 | 931 | &clkcomp, 8, prefix)) |
b0c632db HC |
932 | return -EFAULT; |
933 | ||
f64ca217 | 934 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
59674c1a | 935 | &vcpu->run->s.regs.acrs, 64, prefix)) |
b0c632db HC |
936 | return -EFAULT; |
937 | ||
938 | if (__guestcopy(vcpu, | |
f64ca217 | 939 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
940 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
941 | return -EFAULT; | |
942 | return 0; | |
943 | } | |
944 | ||
e879892c TH |
945 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
946 | { | |
947 | /* | |
948 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
949 | * copying in vcpu load/put. Lets update our copies before we save | |
950 | * it into the save area | |
951 | */ | |
952 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
953 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
954 | save_access_regs(vcpu->run->s.regs.acrs); | |
955 | ||
956 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
957 | } | |
958 | ||
d6712df9 CH |
959 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
960 | struct kvm_enable_cap *cap) | |
961 | { | |
962 | int r; | |
963 | ||
964 | if (cap->flags) | |
965 | return -EINVAL; | |
966 | ||
967 | switch (cap->cap) { | |
fa6b7fe9 CH |
968 | case KVM_CAP_S390_CSS_SUPPORT: |
969 | if (!vcpu->kvm->arch.css_support) { | |
970 | vcpu->kvm->arch.css_support = 1; | |
971 | trace_kvm_s390_enable_css(vcpu->kvm); | |
972 | } | |
973 | r = 0; | |
974 | break; | |
d6712df9 CH |
975 | default: |
976 | r = -EINVAL; | |
977 | break; | |
978 | } | |
979 | return r; | |
980 | } | |
981 | ||
b0c632db HC |
982 | long kvm_arch_vcpu_ioctl(struct file *filp, |
983 | unsigned int ioctl, unsigned long arg) | |
984 | { | |
985 | struct kvm_vcpu *vcpu = filp->private_data; | |
986 | void __user *argp = (void __user *)arg; | |
800c1065 | 987 | int idx; |
bc923cc9 | 988 | long r; |
b0c632db | 989 | |
93736624 AK |
990 | switch (ioctl) { |
991 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
992 | struct kvm_s390_interrupt s390int; |
993 | ||
93736624 | 994 | r = -EFAULT; |
ba5c1e9b | 995 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
996 | break; |
997 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
998 | break; | |
ba5c1e9b | 999 | } |
b0c632db | 1000 | case KVM_S390_STORE_STATUS: |
800c1065 | 1001 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 1002 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 1003 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 1004 | break; |
b0c632db HC |
1005 | case KVM_S390_SET_INITIAL_PSW: { |
1006 | psw_t psw; | |
1007 | ||
bc923cc9 | 1008 | r = -EFAULT; |
b0c632db | 1009 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
1010 | break; |
1011 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
1012 | break; | |
b0c632db HC |
1013 | } |
1014 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
1015 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
1016 | break; | |
14eebd91 CO |
1017 | case KVM_SET_ONE_REG: |
1018 | case KVM_GET_ONE_REG: { | |
1019 | struct kvm_one_reg reg; | |
1020 | r = -EFAULT; | |
1021 | if (copy_from_user(®, argp, sizeof(reg))) | |
1022 | break; | |
1023 | if (ioctl == KVM_SET_ONE_REG) | |
1024 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
1025 | else | |
1026 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
1027 | break; | |
1028 | } | |
27e0393f CO |
1029 | #ifdef CONFIG_KVM_S390_UCONTROL |
1030 | case KVM_S390_UCAS_MAP: { | |
1031 | struct kvm_s390_ucas_mapping ucasmap; | |
1032 | ||
1033 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1034 | r = -EFAULT; | |
1035 | break; | |
1036 | } | |
1037 | ||
1038 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1039 | r = -EINVAL; | |
1040 | break; | |
1041 | } | |
1042 | ||
1043 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
1044 | ucasmap.vcpu_addr, ucasmap.length); | |
1045 | break; | |
1046 | } | |
1047 | case KVM_S390_UCAS_UNMAP: { | |
1048 | struct kvm_s390_ucas_mapping ucasmap; | |
1049 | ||
1050 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1051 | r = -EFAULT; | |
1052 | break; | |
1053 | } | |
1054 | ||
1055 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1056 | r = -EINVAL; | |
1057 | break; | |
1058 | } | |
1059 | ||
1060 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
1061 | ucasmap.length); | |
1062 | break; | |
1063 | } | |
1064 | #endif | |
ccc7910f CO |
1065 | case KVM_S390_VCPU_FAULT: { |
1066 | r = gmap_fault(arg, vcpu->arch.gmap); | |
1067 | if (!IS_ERR_VALUE(r)) | |
1068 | r = 0; | |
1069 | break; | |
1070 | } | |
d6712df9 CH |
1071 | case KVM_ENABLE_CAP: |
1072 | { | |
1073 | struct kvm_enable_cap cap; | |
1074 | r = -EFAULT; | |
1075 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1076 | break; | |
1077 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
1078 | break; | |
1079 | } | |
b0c632db | 1080 | default: |
3e6afcf1 | 1081 | r = -ENOTTY; |
b0c632db | 1082 | } |
bc923cc9 | 1083 | return r; |
b0c632db HC |
1084 | } |
1085 | ||
5b1c1493 CO |
1086 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
1087 | { | |
1088 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1089 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
1090 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
1091 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
1092 | get_page(vmf->page); | |
1093 | return 0; | |
1094 | } | |
1095 | #endif | |
1096 | return VM_FAULT_SIGBUS; | |
1097 | } | |
1098 | ||
5587027c | 1099 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
1100 | struct kvm_memory_slot *dont) |
1101 | { | |
1102 | } | |
1103 | ||
5587027c AK |
1104 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
1105 | unsigned long npages) | |
db3fe4eb TY |
1106 | { |
1107 | return 0; | |
1108 | } | |
1109 | ||
e59dbe09 TY |
1110 | void kvm_arch_memslots_updated(struct kvm *kvm) |
1111 | { | |
1112 | } | |
1113 | ||
b0c632db | 1114 | /* Section: memory related */ |
f7784b8e MT |
1115 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
1116 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
1117 | struct kvm_userspace_memory_region *mem, |
1118 | enum kvm_mr_change change) | |
b0c632db | 1119 | { |
dd2887e7 NW |
1120 | /* A few sanity checks. We can have memory slots which have to be |
1121 | located/ended at a segment boundary (1MB). The memory in userland is | |
1122 | ok to be fragmented into various different vmas. It is okay to mmap() | |
1123 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 1124 | |
598841ca | 1125 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
1126 | return -EINVAL; |
1127 | ||
598841ca | 1128 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
1129 | return -EINVAL; |
1130 | ||
f7784b8e MT |
1131 | return 0; |
1132 | } | |
1133 | ||
1134 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
1135 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
1136 | const struct kvm_memory_slot *old, |
1137 | enum kvm_mr_change change) | |
f7784b8e | 1138 | { |
f7850c92 | 1139 | int rc; |
f7784b8e | 1140 | |
2cef4deb CB |
1141 | /* If the basics of the memslot do not change, we do not want |
1142 | * to update the gmap. Every update causes several unnecessary | |
1143 | * segment translation exceptions. This is usually handled just | |
1144 | * fine by the normal fault handler + gmap, but it will also | |
1145 | * cause faults on the prefix page of running guest CPUs. | |
1146 | */ | |
1147 | if (old->userspace_addr == mem->userspace_addr && | |
1148 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
1149 | old->npages * PAGE_SIZE == mem->memory_size) | |
1150 | return; | |
598841ca CO |
1151 | |
1152 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
1153 | mem->guest_phys_addr, mem->memory_size); | |
1154 | if (rc) | |
f7850c92 | 1155 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 1156 | return; |
b0c632db HC |
1157 | } |
1158 | ||
2df72e9b MT |
1159 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
1160 | { | |
1161 | } | |
1162 | ||
1163 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, | |
1164 | struct kvm_memory_slot *slot) | |
34d4cb8f MT |
1165 | { |
1166 | } | |
1167 | ||
b0c632db HC |
1168 | static int __init kvm_s390_init(void) |
1169 | { | |
ef50f7ac | 1170 | int ret; |
0ee75bea | 1171 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
1172 | if (ret) |
1173 | return ret; | |
1174 | ||
1175 | /* | |
1176 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 1177 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
1178 | * only set facilities that are known to work in KVM. |
1179 | */ | |
78c4b59f MM |
1180 | vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
1181 | if (!vfacilities) { | |
ef50f7ac CB |
1182 | kvm_exit(); |
1183 | return -ENOMEM; | |
1184 | } | |
78c4b59f | 1185 | memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); |
7feb6bb8 MM |
1186 | vfacilities[0] &= 0xff82fff3f47c2000UL; |
1187 | vfacilities[1] &= 0x005c000000000000UL; | |
ef50f7ac | 1188 | return 0; |
b0c632db HC |
1189 | } |
1190 | ||
1191 | static void __exit kvm_s390_exit(void) | |
1192 | { | |
78c4b59f | 1193 | free_page((unsigned long) vfacilities); |
b0c632db HC |
1194 | kvm_exit(); |
1195 | } | |
1196 | ||
1197 | module_init(kvm_s390_init); | |
1198 | module_exit(kvm_s390_exit); | |
566af940 CH |
1199 | |
1200 | /* | |
1201 | * Enable autoloading of the kvm module. | |
1202 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
1203 | * since x86 takes a different approach. | |
1204 | */ | |
1205 | #include <linux/miscdevice.h> | |
1206 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
1207 | MODULE_ALIAS("devname:kvm"); |