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Commit | Line | Data |
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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) }, | |
b31288fa | 71 | { "instruction_essa", VCPU_STAT(instruction_essa) }, |
453423dc CB |
72 | { "instruction_stsi", VCPU_STAT(instruction_stsi) }, |
73 | { "instruction_stfl", VCPU_STAT(instruction_stfl) }, | |
bb25b9ba | 74 | { "instruction_tprot", VCPU_STAT(instruction_tprot) }, |
5288fbf0 | 75 | { "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) }, |
bd59d3a4 | 76 | { "instruction_sigp_sense_running", VCPU_STAT(instruction_sigp_sense_running) }, |
7697e71f | 77 | { "instruction_sigp_external_call", VCPU_STAT(instruction_sigp_external_call) }, |
5288fbf0 CB |
78 | { "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) }, |
79 | { "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) }, | |
80 | { "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) }, | |
81 | { "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) }, | |
82 | { "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) }, | |
388186bc | 83 | { "diagnose_10", VCPU_STAT(diagnose_10) }, |
e28acfea | 84 | { "diagnose_44", VCPU_STAT(diagnose_44) }, |
41628d33 | 85 | { "diagnose_9c", VCPU_STAT(diagnose_9c) }, |
b0c632db HC |
86 | { NULL } |
87 | }; | |
88 | ||
78c4b59f | 89 | unsigned long *vfacilities; |
2c70fe44 | 90 | static struct gmap_notifier gmap_notifier; |
b0c632db | 91 | |
78c4b59f MM |
92 | /* test availability of vfacility */ |
93 | static inline int test_vfacility(unsigned long nr) | |
94 | { | |
95 | return __test_facility(nr, (void *) vfacilities); | |
96 | } | |
97 | ||
b0c632db | 98 | /* Section: not file related */ |
10474ae8 | 99 | int kvm_arch_hardware_enable(void *garbage) |
b0c632db HC |
100 | { |
101 | /* every s390 is virtualization enabled ;-) */ | |
10474ae8 | 102 | return 0; |
b0c632db HC |
103 | } |
104 | ||
105 | void kvm_arch_hardware_disable(void *garbage) | |
106 | { | |
107 | } | |
108 | ||
2c70fe44 CB |
109 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address); |
110 | ||
b0c632db HC |
111 | int kvm_arch_hardware_setup(void) |
112 | { | |
2c70fe44 CB |
113 | gmap_notifier.notifier_call = kvm_gmap_notifier; |
114 | gmap_register_ipte_notifier(&gmap_notifier); | |
b0c632db HC |
115 | return 0; |
116 | } | |
117 | ||
118 | void kvm_arch_hardware_unsetup(void) | |
119 | { | |
2c70fe44 | 120 | gmap_unregister_ipte_notifier(&gmap_notifier); |
b0c632db HC |
121 | } |
122 | ||
123 | void kvm_arch_check_processor_compat(void *rtn) | |
124 | { | |
125 | } | |
126 | ||
127 | int kvm_arch_init(void *opaque) | |
128 | { | |
129 | return 0; | |
130 | } | |
131 | ||
132 | void kvm_arch_exit(void) | |
133 | { | |
134 | } | |
135 | ||
136 | /* Section: device related */ | |
137 | long kvm_arch_dev_ioctl(struct file *filp, | |
138 | unsigned int ioctl, unsigned long arg) | |
139 | { | |
140 | if (ioctl == KVM_S390_ENABLE_SIE) | |
141 | return s390_enable_sie(); | |
142 | return -EINVAL; | |
143 | } | |
144 | ||
145 | int kvm_dev_ioctl_check_extension(long ext) | |
146 | { | |
d7b0b5eb CO |
147 | int r; |
148 | ||
2bd0ac4e | 149 | switch (ext) { |
d7b0b5eb | 150 | case KVM_CAP_S390_PSW: |
b6cf8788 | 151 | case KVM_CAP_S390_GMAP: |
52e16b18 | 152 | case KVM_CAP_SYNC_MMU: |
1efd0f59 CO |
153 | #ifdef CONFIG_KVM_S390_UCONTROL |
154 | case KVM_CAP_S390_UCONTROL: | |
155 | #endif | |
3c038e6b | 156 | case KVM_CAP_ASYNC_PF: |
60b413c9 | 157 | case KVM_CAP_SYNC_REGS: |
14eebd91 | 158 | case KVM_CAP_ONE_REG: |
d6712df9 | 159 | case KVM_CAP_ENABLE_CAP: |
fa6b7fe9 | 160 | case KVM_CAP_S390_CSS_SUPPORT: |
10ccaa1e | 161 | case KVM_CAP_IOEVENTFD: |
c05c4186 | 162 | case KVM_CAP_DEVICE_CTRL: |
d938dc55 | 163 | case KVM_CAP_ENABLE_CAP_VM: |
d7b0b5eb CO |
164 | r = 1; |
165 | break; | |
e726b1bd CB |
166 | case KVM_CAP_NR_VCPUS: |
167 | case KVM_CAP_MAX_VCPUS: | |
168 | r = KVM_MAX_VCPUS; | |
169 | break; | |
e1e2e605 NW |
170 | case KVM_CAP_NR_MEMSLOTS: |
171 | r = KVM_USER_MEM_SLOTS; | |
172 | break; | |
1526bf9c | 173 | case KVM_CAP_S390_COW: |
abf09bed | 174 | r = MACHINE_HAS_ESOP; |
1526bf9c | 175 | break; |
2bd0ac4e | 176 | default: |
d7b0b5eb | 177 | r = 0; |
2bd0ac4e | 178 | } |
d7b0b5eb | 179 | return r; |
b0c632db HC |
180 | } |
181 | ||
182 | /* Section: vm related */ | |
183 | /* | |
184 | * Get (and clear) the dirty memory log for a memory slot. | |
185 | */ | |
186 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
187 | struct kvm_dirty_log *log) | |
188 | { | |
189 | return 0; | |
190 | } | |
191 | ||
d938dc55 CH |
192 | static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap) |
193 | { | |
194 | int r; | |
195 | ||
196 | if (cap->flags) | |
197 | return -EINVAL; | |
198 | ||
199 | switch (cap->cap) { | |
84223598 CH |
200 | case KVM_CAP_S390_IRQCHIP: |
201 | kvm->arch.use_irqchip = 1; | |
202 | r = 0; | |
203 | break; | |
d938dc55 CH |
204 | default: |
205 | r = -EINVAL; | |
206 | break; | |
207 | } | |
208 | return r; | |
209 | } | |
210 | ||
b0c632db HC |
211 | long kvm_arch_vm_ioctl(struct file *filp, |
212 | unsigned int ioctl, unsigned long arg) | |
213 | { | |
214 | struct kvm *kvm = filp->private_data; | |
215 | void __user *argp = (void __user *)arg; | |
216 | int r; | |
217 | ||
218 | switch (ioctl) { | |
ba5c1e9b CO |
219 | case KVM_S390_INTERRUPT: { |
220 | struct kvm_s390_interrupt s390int; | |
221 | ||
222 | r = -EFAULT; | |
223 | if (copy_from_user(&s390int, argp, sizeof(s390int))) | |
224 | break; | |
225 | r = kvm_s390_inject_vm(kvm, &s390int); | |
226 | break; | |
227 | } | |
d938dc55 CH |
228 | case KVM_ENABLE_CAP: { |
229 | struct kvm_enable_cap cap; | |
230 | r = -EFAULT; | |
231 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
232 | break; | |
233 | r = kvm_vm_ioctl_enable_cap(kvm, &cap); | |
234 | break; | |
235 | } | |
84223598 CH |
236 | case KVM_CREATE_IRQCHIP: { |
237 | struct kvm_irq_routing_entry routing; | |
238 | ||
239 | r = -EINVAL; | |
240 | if (kvm->arch.use_irqchip) { | |
241 | /* Set up dummy routing. */ | |
242 | memset(&routing, 0, sizeof(routing)); | |
243 | kvm_set_irq_routing(kvm, &routing, 0, 0); | |
244 | r = 0; | |
245 | } | |
246 | break; | |
247 | } | |
b0c632db | 248 | default: |
367e1319 | 249 | r = -ENOTTY; |
b0c632db HC |
250 | } |
251 | ||
252 | return r; | |
253 | } | |
254 | ||
e08b9637 | 255 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
b0c632db | 256 | { |
b0c632db HC |
257 | int rc; |
258 | char debug_name[16]; | |
f6c137ff | 259 | static unsigned long sca_offset; |
b0c632db | 260 | |
e08b9637 CO |
261 | rc = -EINVAL; |
262 | #ifdef CONFIG_KVM_S390_UCONTROL | |
263 | if (type & ~KVM_VM_S390_UCONTROL) | |
264 | goto out_err; | |
265 | if ((type & KVM_VM_S390_UCONTROL) && (!capable(CAP_SYS_ADMIN))) | |
266 | goto out_err; | |
267 | #else | |
268 | if (type) | |
269 | goto out_err; | |
270 | #endif | |
271 | ||
b0c632db HC |
272 | rc = s390_enable_sie(); |
273 | if (rc) | |
d89f5eff | 274 | goto out_err; |
b0c632db | 275 | |
b290411a CO |
276 | rc = -ENOMEM; |
277 | ||
b0c632db HC |
278 | kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL); |
279 | if (!kvm->arch.sca) | |
d89f5eff | 280 | goto out_err; |
f6c137ff CB |
281 | spin_lock(&kvm_lock); |
282 | sca_offset = (sca_offset + 16) & 0x7f0; | |
283 | kvm->arch.sca = (struct sca_block *) ((char *) kvm->arch.sca + sca_offset); | |
284 | spin_unlock(&kvm_lock); | |
b0c632db HC |
285 | |
286 | sprintf(debug_name, "kvm-%u", current->pid); | |
287 | ||
288 | kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long)); | |
289 | if (!kvm->arch.dbf) | |
290 | goto out_nodbf; | |
291 | ||
ba5c1e9b CO |
292 | spin_lock_init(&kvm->arch.float_int.lock); |
293 | INIT_LIST_HEAD(&kvm->arch.float_int.list); | |
294 | ||
b0c632db HC |
295 | debug_register_view(kvm->arch.dbf, &debug_sprintf_view); |
296 | VM_EVENT(kvm, 3, "%s", "vm created"); | |
297 | ||
e08b9637 CO |
298 | if (type & KVM_VM_S390_UCONTROL) { |
299 | kvm->arch.gmap = NULL; | |
300 | } else { | |
301 | kvm->arch.gmap = gmap_alloc(current->mm); | |
302 | if (!kvm->arch.gmap) | |
303 | goto out_nogmap; | |
2c70fe44 | 304 | kvm->arch.gmap->private = kvm; |
24eb3a82 | 305 | kvm->arch.gmap->pfault_enabled = 0; |
e08b9637 | 306 | } |
fa6b7fe9 CH |
307 | |
308 | kvm->arch.css_support = 0; | |
84223598 | 309 | kvm->arch.use_irqchip = 0; |
fa6b7fe9 | 310 | |
d89f5eff | 311 | return 0; |
598841ca CO |
312 | out_nogmap: |
313 | debug_unregister(kvm->arch.dbf); | |
b0c632db HC |
314 | out_nodbf: |
315 | free_page((unsigned long)(kvm->arch.sca)); | |
d89f5eff JK |
316 | out_err: |
317 | return rc; | |
b0c632db HC |
318 | } |
319 | ||
d329c035 CB |
320 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
321 | { | |
322 | VCPU_EVENT(vcpu, 3, "%s", "free cpu"); | |
ade38c31 | 323 | trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id); |
3c038e6b | 324 | kvm_clear_async_pf_completion_queue(vcpu); |
58f9460b CO |
325 | if (!kvm_is_ucontrol(vcpu->kvm)) { |
326 | clear_bit(63 - vcpu->vcpu_id, | |
327 | (unsigned long *) &vcpu->kvm->arch.sca->mcn); | |
328 | if (vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda == | |
329 | (__u64) vcpu->arch.sie_block) | |
330 | vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sda = 0; | |
331 | } | |
abf4a71e | 332 | smp_mb(); |
27e0393f CO |
333 | |
334 | if (kvm_is_ucontrol(vcpu->kvm)) | |
335 | gmap_free(vcpu->arch.gmap); | |
336 | ||
b31288fa KW |
337 | if (vcpu->arch.sie_block->cbrlo) |
338 | __free_page(__pfn_to_page( | |
339 | vcpu->arch.sie_block->cbrlo >> PAGE_SHIFT)); | |
d329c035 | 340 | free_page((unsigned long)(vcpu->arch.sie_block)); |
b31288fa | 341 | |
6692cef3 | 342 | kvm_vcpu_uninit(vcpu); |
b110feaf | 343 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
d329c035 CB |
344 | } |
345 | ||
346 | static void kvm_free_vcpus(struct kvm *kvm) | |
347 | { | |
348 | unsigned int i; | |
988a2cae | 349 | struct kvm_vcpu *vcpu; |
d329c035 | 350 | |
988a2cae GN |
351 | kvm_for_each_vcpu(i, vcpu, kvm) |
352 | kvm_arch_vcpu_destroy(vcpu); | |
353 | ||
354 | mutex_lock(&kvm->lock); | |
355 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
356 | kvm->vcpus[i] = NULL; | |
357 | ||
358 | atomic_set(&kvm->online_vcpus, 0); | |
359 | mutex_unlock(&kvm->lock); | |
d329c035 CB |
360 | } |
361 | ||
ad8ba2cd SY |
362 | void kvm_arch_sync_events(struct kvm *kvm) |
363 | { | |
364 | } | |
365 | ||
b0c632db HC |
366 | void kvm_arch_destroy_vm(struct kvm *kvm) |
367 | { | |
d329c035 | 368 | kvm_free_vcpus(kvm); |
b0c632db | 369 | free_page((unsigned long)(kvm->arch.sca)); |
d329c035 | 370 | debug_unregister(kvm->arch.dbf); |
27e0393f CO |
371 | if (!kvm_is_ucontrol(kvm)) |
372 | gmap_free(kvm->arch.gmap); | |
841b91c5 | 373 | kvm_s390_destroy_adapters(kvm); |
b0c632db HC |
374 | } |
375 | ||
376 | /* Section: vcpu related */ | |
377 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
378 | { | |
3c038e6b DD |
379 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
380 | kvm_clear_async_pf_completion_queue(vcpu); | |
27e0393f CO |
381 | if (kvm_is_ucontrol(vcpu->kvm)) { |
382 | vcpu->arch.gmap = gmap_alloc(current->mm); | |
383 | if (!vcpu->arch.gmap) | |
384 | return -ENOMEM; | |
2c70fe44 | 385 | vcpu->arch.gmap->private = vcpu->kvm; |
27e0393f CO |
386 | return 0; |
387 | } | |
388 | ||
598841ca | 389 | vcpu->arch.gmap = vcpu->kvm->arch.gmap; |
59674c1a CB |
390 | vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX | |
391 | KVM_SYNC_GPRS | | |
9eed0735 CB |
392 | KVM_SYNC_ACRS | |
393 | KVM_SYNC_CRS; | |
b0c632db HC |
394 | return 0; |
395 | } | |
396 | ||
397 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
398 | { | |
6692cef3 | 399 | /* Nothing todo */ |
b0c632db HC |
400 | } |
401 | ||
402 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
403 | { | |
4725c860 MS |
404 | save_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
405 | save_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db | 406 | save_access_regs(vcpu->arch.host_acrs); |
4725c860 MS |
407 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
408 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 409 | restore_access_regs(vcpu->run->s.regs.acrs); |
480e5926 | 410 | gmap_enable(vcpu->arch.gmap); |
9e6dabef | 411 | atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
b0c632db HC |
412 | } |
413 | ||
414 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
415 | { | |
9e6dabef | 416 | atomic_clear_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags); |
480e5926 | 417 | gmap_disable(vcpu->arch.gmap); |
4725c860 MS |
418 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); |
419 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
59674c1a | 420 | save_access_regs(vcpu->run->s.regs.acrs); |
4725c860 MS |
421 | restore_fp_ctl(&vcpu->arch.host_fpregs.fpc); |
422 | restore_fp_regs(vcpu->arch.host_fpregs.fprs); | |
b0c632db HC |
423 | restore_access_regs(vcpu->arch.host_acrs); |
424 | } | |
425 | ||
426 | static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu) | |
427 | { | |
428 | /* this equals initial cpu reset in pop, but we don't switch to ESA */ | |
429 | vcpu->arch.sie_block->gpsw.mask = 0UL; | |
430 | vcpu->arch.sie_block->gpsw.addr = 0UL; | |
8d26cf7b | 431 | kvm_s390_set_prefix(vcpu, 0); |
b0c632db HC |
432 | vcpu->arch.sie_block->cputm = 0UL; |
433 | vcpu->arch.sie_block->ckc = 0UL; | |
434 | vcpu->arch.sie_block->todpr = 0; | |
435 | memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64)); | |
436 | vcpu->arch.sie_block->gcr[0] = 0xE0UL; | |
437 | vcpu->arch.sie_block->gcr[14] = 0xC2000000UL; | |
438 | vcpu->arch.guest_fpregs.fpc = 0; | |
439 | asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc)); | |
440 | vcpu->arch.sie_block->gbea = 1; | |
672550fb | 441 | vcpu->arch.sie_block->pp = 0; |
3c038e6b DD |
442 | vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID; |
443 | kvm_clear_async_pf_completion_queue(vcpu); | |
61bde82c | 444 | atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
2ed10cc1 | 445 | kvm_s390_clear_local_irqs(vcpu); |
b0c632db HC |
446 | } |
447 | ||
42897d86 MT |
448 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
449 | { | |
450 | return 0; | |
451 | } | |
452 | ||
b0c632db HC |
453 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
454 | { | |
b31288fa KW |
455 | struct page *cbrl; |
456 | ||
9e6dabef CH |
457 | atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH | |
458 | CPUSTAT_SM | | |
69d0d3a3 CB |
459 | CPUSTAT_STOPPED | |
460 | CPUSTAT_GED); | |
fc34531d | 461 | vcpu->arch.sie_block->ecb = 6; |
7feb6bb8 MM |
462 | if (test_vfacility(50) && test_vfacility(73)) |
463 | vcpu->arch.sie_block->ecb |= 0x10; | |
464 | ||
69d0d3a3 | 465 | vcpu->arch.sie_block->ecb2 = 8; |
b0c632db | 466 | vcpu->arch.sie_block->eca = 0xC1002001U; |
78c4b59f | 467 | vcpu->arch.sie_block->fac = (int) (long) vfacilities; |
b31288fa KW |
468 | if (kvm_enabled_cmma()) { |
469 | cbrl = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
470 | if (cbrl) { | |
471 | vcpu->arch.sie_block->ecb2 |= 0x80; | |
472 | vcpu->arch.sie_block->ecb2 &= ~0x08; | |
473 | vcpu->arch.sie_block->cbrlo = page_to_phys(cbrl); | |
474 | } | |
475 | } | |
ca872302 CB |
476 | hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
477 | tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet, | |
478 | (unsigned long) vcpu); | |
479 | vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup; | |
453423dc | 480 | get_cpu_id(&vcpu->arch.cpu_id); |
92e6ecf3 | 481 | vcpu->arch.cpu_id.version = 0xff; |
b0c632db HC |
482 | return 0; |
483 | } | |
484 | ||
485 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
486 | unsigned int id) | |
487 | { | |
4d47555a | 488 | struct kvm_vcpu *vcpu; |
7feb6bb8 | 489 | struct sie_page *sie_page; |
4d47555a CO |
490 | int rc = -EINVAL; |
491 | ||
492 | if (id >= KVM_MAX_VCPUS) | |
493 | goto out; | |
494 | ||
495 | rc = -ENOMEM; | |
b0c632db | 496 | |
b110feaf | 497 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
b0c632db | 498 | if (!vcpu) |
4d47555a | 499 | goto out; |
b0c632db | 500 | |
7feb6bb8 MM |
501 | sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL); |
502 | if (!sie_page) | |
b0c632db HC |
503 | goto out_free_cpu; |
504 | ||
7feb6bb8 MM |
505 | vcpu->arch.sie_block = &sie_page->sie_block; |
506 | vcpu->arch.sie_block->itdba = (unsigned long) &sie_page->itdb; | |
507 | ||
b0c632db | 508 | vcpu->arch.sie_block->icpua = id; |
58f9460b CO |
509 | if (!kvm_is_ucontrol(kvm)) { |
510 | if (!kvm->arch.sca) { | |
511 | WARN_ON_ONCE(1); | |
512 | goto out_free_cpu; | |
513 | } | |
514 | if (!kvm->arch.sca->cpu[id].sda) | |
515 | kvm->arch.sca->cpu[id].sda = | |
516 | (__u64) vcpu->arch.sie_block; | |
517 | vcpu->arch.sie_block->scaoh = | |
518 | (__u32)(((__u64)kvm->arch.sca) >> 32); | |
519 | vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca; | |
520 | set_bit(63 - id, (unsigned long *) &kvm->arch.sca->mcn); | |
521 | } | |
b0c632db | 522 | |
ba5c1e9b CO |
523 | spin_lock_init(&vcpu->arch.local_int.lock); |
524 | INIT_LIST_HEAD(&vcpu->arch.local_int.list); | |
525 | vcpu->arch.local_int.float_int = &kvm->arch.float_int; | |
d0321a24 | 526 | vcpu->arch.local_int.wq = &vcpu->wq; |
5288fbf0 | 527 | vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags; |
ba5c1e9b | 528 | |
b0c632db HC |
529 | rc = kvm_vcpu_init(vcpu, kvm, id); |
530 | if (rc) | |
7b06bf2f | 531 | goto out_free_sie_block; |
b0c632db HC |
532 | VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu, |
533 | vcpu->arch.sie_block); | |
ade38c31 | 534 | trace_kvm_s390_create_vcpu(id, vcpu, vcpu->arch.sie_block); |
b0c632db | 535 | |
b0c632db | 536 | return vcpu; |
7b06bf2f WY |
537 | out_free_sie_block: |
538 | free_page((unsigned long)(vcpu->arch.sie_block)); | |
b0c632db | 539 | out_free_cpu: |
b110feaf | 540 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
4d47555a | 541 | out: |
b0c632db HC |
542 | return ERR_PTR(rc); |
543 | } | |
544 | ||
b0c632db HC |
545 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
546 | { | |
f87618e8 | 547 | return kvm_cpu_has_interrupt(vcpu); |
b0c632db HC |
548 | } |
549 | ||
49b99e1e CB |
550 | void s390_vcpu_block(struct kvm_vcpu *vcpu) |
551 | { | |
552 | atomic_set_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
553 | } | |
554 | ||
555 | void s390_vcpu_unblock(struct kvm_vcpu *vcpu) | |
556 | { | |
557 | atomic_clear_mask(PROG_BLOCK_SIE, &vcpu->arch.sie_block->prog20); | |
558 | } | |
559 | ||
560 | /* | |
561 | * Kick a guest cpu out of SIE and wait until SIE is not running. | |
562 | * If the CPU is not running (e.g. waiting as idle) the function will | |
563 | * return immediately. */ | |
564 | void exit_sie(struct kvm_vcpu *vcpu) | |
565 | { | |
566 | atomic_set_mask(CPUSTAT_STOP_INT, &vcpu->arch.sie_block->cpuflags); | |
567 | while (vcpu->arch.sie_block->prog0c & PROG_IN_SIE) | |
568 | cpu_relax(); | |
569 | } | |
570 | ||
571 | /* Kick a guest cpu out of SIE and prevent SIE-reentry */ | |
572 | void exit_sie_sync(struct kvm_vcpu *vcpu) | |
573 | { | |
574 | s390_vcpu_block(vcpu); | |
575 | exit_sie(vcpu); | |
576 | } | |
577 | ||
2c70fe44 CB |
578 | static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address) |
579 | { | |
580 | int i; | |
581 | struct kvm *kvm = gmap->private; | |
582 | struct kvm_vcpu *vcpu; | |
583 | ||
584 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
585 | /* match against both prefix pages */ | |
586 | if (vcpu->arch.sie_block->prefix == (address & ~0x1000UL)) { | |
587 | VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address); | |
588 | kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); | |
589 | exit_sie_sync(vcpu); | |
590 | } | |
591 | } | |
592 | } | |
593 | ||
b6d33834 CD |
594 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
595 | { | |
596 | /* kvm common code refers to this, but never calls it */ | |
597 | BUG(); | |
598 | return 0; | |
599 | } | |
600 | ||
14eebd91 CO |
601 | static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, |
602 | struct kvm_one_reg *reg) | |
603 | { | |
604 | int r = -EINVAL; | |
605 | ||
606 | switch (reg->id) { | |
29b7c71b CO |
607 | case KVM_REG_S390_TODPR: |
608 | r = put_user(vcpu->arch.sie_block->todpr, | |
609 | (u32 __user *)reg->addr); | |
610 | break; | |
611 | case KVM_REG_S390_EPOCHDIFF: | |
612 | r = put_user(vcpu->arch.sie_block->epoch, | |
613 | (u64 __user *)reg->addr); | |
614 | break; | |
46a6dd1c J |
615 | case KVM_REG_S390_CPU_TIMER: |
616 | r = put_user(vcpu->arch.sie_block->cputm, | |
617 | (u64 __user *)reg->addr); | |
618 | break; | |
619 | case KVM_REG_S390_CLOCK_COMP: | |
620 | r = put_user(vcpu->arch.sie_block->ckc, | |
621 | (u64 __user *)reg->addr); | |
622 | break; | |
536336c2 DD |
623 | case KVM_REG_S390_PFTOKEN: |
624 | r = put_user(vcpu->arch.pfault_token, | |
625 | (u64 __user *)reg->addr); | |
626 | break; | |
627 | case KVM_REG_S390_PFCOMPARE: | |
628 | r = put_user(vcpu->arch.pfault_compare, | |
629 | (u64 __user *)reg->addr); | |
630 | break; | |
631 | case KVM_REG_S390_PFSELECT: | |
632 | r = put_user(vcpu->arch.pfault_select, | |
633 | (u64 __user *)reg->addr); | |
634 | break; | |
672550fb CB |
635 | case KVM_REG_S390_PP: |
636 | r = put_user(vcpu->arch.sie_block->pp, | |
637 | (u64 __user *)reg->addr); | |
638 | break; | |
afa45ff5 CB |
639 | case KVM_REG_S390_GBEA: |
640 | r = put_user(vcpu->arch.sie_block->gbea, | |
641 | (u64 __user *)reg->addr); | |
642 | break; | |
14eebd91 CO |
643 | default: |
644 | break; | |
645 | } | |
646 | ||
647 | return r; | |
648 | } | |
649 | ||
650 | static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, | |
651 | struct kvm_one_reg *reg) | |
652 | { | |
653 | int r = -EINVAL; | |
654 | ||
655 | switch (reg->id) { | |
29b7c71b CO |
656 | case KVM_REG_S390_TODPR: |
657 | r = get_user(vcpu->arch.sie_block->todpr, | |
658 | (u32 __user *)reg->addr); | |
659 | break; | |
660 | case KVM_REG_S390_EPOCHDIFF: | |
661 | r = get_user(vcpu->arch.sie_block->epoch, | |
662 | (u64 __user *)reg->addr); | |
663 | break; | |
46a6dd1c J |
664 | case KVM_REG_S390_CPU_TIMER: |
665 | r = get_user(vcpu->arch.sie_block->cputm, | |
666 | (u64 __user *)reg->addr); | |
667 | break; | |
668 | case KVM_REG_S390_CLOCK_COMP: | |
669 | r = get_user(vcpu->arch.sie_block->ckc, | |
670 | (u64 __user *)reg->addr); | |
671 | break; | |
536336c2 DD |
672 | case KVM_REG_S390_PFTOKEN: |
673 | r = get_user(vcpu->arch.pfault_token, | |
674 | (u64 __user *)reg->addr); | |
675 | break; | |
676 | case KVM_REG_S390_PFCOMPARE: | |
677 | r = get_user(vcpu->arch.pfault_compare, | |
678 | (u64 __user *)reg->addr); | |
679 | break; | |
680 | case KVM_REG_S390_PFSELECT: | |
681 | r = get_user(vcpu->arch.pfault_select, | |
682 | (u64 __user *)reg->addr); | |
683 | break; | |
672550fb CB |
684 | case KVM_REG_S390_PP: |
685 | r = get_user(vcpu->arch.sie_block->pp, | |
686 | (u64 __user *)reg->addr); | |
687 | break; | |
afa45ff5 CB |
688 | case KVM_REG_S390_GBEA: |
689 | r = get_user(vcpu->arch.sie_block->gbea, | |
690 | (u64 __user *)reg->addr); | |
691 | break; | |
14eebd91 CO |
692 | default: |
693 | break; | |
694 | } | |
695 | ||
696 | return r; | |
697 | } | |
b6d33834 | 698 | |
b0c632db HC |
699 | static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu) |
700 | { | |
b0c632db | 701 | kvm_s390_vcpu_initial_reset(vcpu); |
b0c632db HC |
702 | return 0; |
703 | } | |
704 | ||
705 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
706 | { | |
5a32c1af | 707 | memcpy(&vcpu->run->s.regs.gprs, ®s->gprs, sizeof(regs->gprs)); |
b0c632db HC |
708 | return 0; |
709 | } | |
710 | ||
711 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
712 | { | |
5a32c1af | 713 | memcpy(®s->gprs, &vcpu->run->s.regs.gprs, sizeof(regs->gprs)); |
b0c632db HC |
714 | return 0; |
715 | } | |
716 | ||
717 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
718 | struct kvm_sregs *sregs) | |
719 | { | |
59674c1a | 720 | memcpy(&vcpu->run->s.regs.acrs, &sregs->acrs, sizeof(sregs->acrs)); |
b0c632db | 721 | memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs)); |
59674c1a | 722 | restore_access_regs(vcpu->run->s.regs.acrs); |
b0c632db HC |
723 | return 0; |
724 | } | |
725 | ||
726 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
727 | struct kvm_sregs *sregs) | |
728 | { | |
59674c1a | 729 | memcpy(&sregs->acrs, &vcpu->run->s.regs.acrs, sizeof(sregs->acrs)); |
b0c632db | 730 | memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs)); |
b0c632db HC |
731 | return 0; |
732 | } | |
733 | ||
734 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
735 | { | |
4725c860 MS |
736 | if (test_fp_ctl(fpu->fpc)) |
737 | return -EINVAL; | |
b0c632db | 738 | memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs)); |
4725c860 MS |
739 | vcpu->arch.guest_fpregs.fpc = fpu->fpc; |
740 | restore_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
741 | restore_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
b0c632db HC |
742 | return 0; |
743 | } | |
744 | ||
745 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
746 | { | |
b0c632db HC |
747 | memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs)); |
748 | fpu->fpc = vcpu->arch.guest_fpregs.fpc; | |
b0c632db HC |
749 | return 0; |
750 | } | |
751 | ||
752 | static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw) | |
753 | { | |
754 | int rc = 0; | |
755 | ||
9e6dabef | 756 | if (!(atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED)) |
b0c632db | 757 | rc = -EBUSY; |
d7b0b5eb CO |
758 | else { |
759 | vcpu->run->psw_mask = psw.mask; | |
760 | vcpu->run->psw_addr = psw.addr; | |
761 | } | |
b0c632db HC |
762 | return rc; |
763 | } | |
764 | ||
765 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
766 | struct kvm_translation *tr) | |
767 | { | |
768 | return -EINVAL; /* not implemented yet */ | |
769 | } | |
770 | ||
d0bfb940 JK |
771 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
772 | struct kvm_guest_debug *dbg) | |
b0c632db HC |
773 | { |
774 | return -EINVAL; /* not implemented yet */ | |
775 | } | |
776 | ||
62d9f0db MT |
777 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
778 | struct kvm_mp_state *mp_state) | |
779 | { | |
780 | return -EINVAL; /* not implemented yet */ | |
781 | } | |
782 | ||
783 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
784 | struct kvm_mp_state *mp_state) | |
785 | { | |
786 | return -EINVAL; /* not implemented yet */ | |
787 | } | |
788 | ||
2c70fe44 CB |
789 | static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) |
790 | { | |
791 | /* | |
792 | * We use MMU_RELOAD just to re-arm the ipte notifier for the | |
793 | * guest prefix page. gmap_ipte_notify will wait on the ptl lock. | |
794 | * This ensures that the ipte instruction for this request has | |
795 | * already finished. We might race against a second unmapper that | |
796 | * wants to set the blocking bit. Lets just retry the request loop. | |
797 | */ | |
798 | while (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) { | |
799 | int rc; | |
800 | rc = gmap_ipte_notify(vcpu->arch.gmap, | |
801 | vcpu->arch.sie_block->prefix, | |
802 | PAGE_SIZE * 2); | |
803 | if (rc) | |
804 | return rc; | |
805 | s390_vcpu_unblock(vcpu); | |
806 | } | |
807 | return 0; | |
808 | } | |
809 | ||
24eb3a82 DD |
810 | static long kvm_arch_fault_in_sync(struct kvm_vcpu *vcpu) |
811 | { | |
812 | long rc; | |
813 | hva_t fault = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap); | |
814 | struct mm_struct *mm = current->mm; | |
815 | down_read(&mm->mmap_sem); | |
816 | rc = get_user_pages(current, mm, fault, 1, 1, 0, NULL, NULL); | |
817 | up_read(&mm->mmap_sem); | |
818 | return rc; | |
819 | } | |
820 | ||
3c038e6b DD |
821 | static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token, |
822 | unsigned long token) | |
823 | { | |
824 | struct kvm_s390_interrupt inti; | |
825 | inti.parm64 = token; | |
826 | ||
827 | if (start_token) { | |
828 | inti.type = KVM_S390_INT_PFAULT_INIT; | |
829 | WARN_ON_ONCE(kvm_s390_inject_vcpu(vcpu, &inti)); | |
830 | } else { | |
831 | inti.type = KVM_S390_INT_PFAULT_DONE; | |
832 | WARN_ON_ONCE(kvm_s390_inject_vm(vcpu->kvm, &inti)); | |
833 | } | |
834 | } | |
835 | ||
836 | void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, | |
837 | struct kvm_async_pf *work) | |
838 | { | |
839 | trace_kvm_s390_pfault_init(vcpu, work->arch.pfault_token); | |
840 | __kvm_inject_pfault_token(vcpu, true, work->arch.pfault_token); | |
841 | } | |
842 | ||
843 | void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, | |
844 | struct kvm_async_pf *work) | |
845 | { | |
846 | trace_kvm_s390_pfault_done(vcpu, work->arch.pfault_token); | |
847 | __kvm_inject_pfault_token(vcpu, false, work->arch.pfault_token); | |
848 | } | |
849 | ||
850 | void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu, | |
851 | struct kvm_async_pf *work) | |
852 | { | |
853 | /* s390 will always inject the page directly */ | |
854 | } | |
855 | ||
856 | bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) | |
857 | { | |
858 | /* | |
859 | * s390 will always inject the page directly, | |
860 | * but we still want check_async_completion to cleanup | |
861 | */ | |
862 | return true; | |
863 | } | |
864 | ||
865 | static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu) | |
866 | { | |
867 | hva_t hva; | |
868 | struct kvm_arch_async_pf arch; | |
869 | int rc; | |
870 | ||
871 | if (vcpu->arch.pfault_token == KVM_S390_PFAULT_TOKEN_INVALID) | |
872 | return 0; | |
873 | if ((vcpu->arch.sie_block->gpsw.mask & vcpu->arch.pfault_select) != | |
874 | vcpu->arch.pfault_compare) | |
875 | return 0; | |
876 | if (psw_extint_disabled(vcpu)) | |
877 | return 0; | |
878 | if (kvm_cpu_has_interrupt(vcpu)) | |
879 | return 0; | |
880 | if (!(vcpu->arch.sie_block->gcr[0] & 0x200ul)) | |
881 | return 0; | |
882 | if (!vcpu->arch.gmap->pfault_enabled) | |
883 | return 0; | |
884 | ||
885 | hva = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap); | |
886 | if (copy_from_guest(vcpu, &arch.pfault_token, vcpu->arch.pfault_token, 8)) | |
887 | return 0; | |
888 | ||
889 | rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch); | |
890 | return rc; | |
891 | } | |
892 | ||
3fb4c40f | 893 | static int vcpu_pre_run(struct kvm_vcpu *vcpu) |
b0c632db | 894 | { |
3fb4c40f | 895 | int rc, cpuflags; |
e168bf8d | 896 | |
3c038e6b DD |
897 | /* |
898 | * On s390 notifications for arriving pages will be delivered directly | |
899 | * to the guest but the house keeping for completed pfaults is | |
900 | * handled outside the worker. | |
901 | */ | |
902 | kvm_check_async_pf_completion(vcpu); | |
903 | ||
5a32c1af | 904 | memcpy(&vcpu->arch.sie_block->gg14, &vcpu->run->s.regs.gprs[14], 16); |
b0c632db HC |
905 | |
906 | if (need_resched()) | |
907 | schedule(); | |
908 | ||
71cde587 CB |
909 | if (test_thread_flag(TIF_MCCK_PENDING)) |
910 | s390_handle_mcck(); | |
911 | ||
d6b6d166 CO |
912 | if (!kvm_is_ucontrol(vcpu->kvm)) |
913 | kvm_s390_deliver_pending_interrupts(vcpu); | |
0ff31867 | 914 | |
2c70fe44 CB |
915 | rc = kvm_s390_handle_requests(vcpu); |
916 | if (rc) | |
917 | return rc; | |
918 | ||
b0c632db | 919 | vcpu->arch.sie_block->icptcode = 0; |
3fb4c40f TH |
920 | cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags); |
921 | VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags); | |
922 | trace_kvm_s390_sie_enter(vcpu, cpuflags); | |
2b29a9fd | 923 | |
3fb4c40f TH |
924 | return 0; |
925 | } | |
926 | ||
927 | static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason) | |
928 | { | |
24eb3a82 | 929 | int rc = -1; |
2b29a9fd DD |
930 | |
931 | VCPU_EVENT(vcpu, 6, "exit sie icptcode %d", | |
932 | vcpu->arch.sie_block->icptcode); | |
933 | trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode); | |
934 | ||
3fb4c40f | 935 | if (exit_reason >= 0) { |
7c470539 | 936 | rc = 0; |
210b1607 TH |
937 | } else if (kvm_is_ucontrol(vcpu->kvm)) { |
938 | vcpu->run->exit_reason = KVM_EXIT_S390_UCONTROL; | |
939 | vcpu->run->s390_ucontrol.trans_exc_code = | |
940 | current->thread.gmap_addr; | |
941 | vcpu->run->s390_ucontrol.pgm_code = 0x10; | |
942 | rc = -EREMOTE; | |
24eb3a82 DD |
943 | |
944 | } else if (current->thread.gmap_pfault) { | |
3c038e6b | 945 | trace_kvm_s390_major_guest_pfault(vcpu); |
24eb3a82 | 946 | current->thread.gmap_pfault = 0; |
3c038e6b DD |
947 | if (kvm_arch_setup_async_pf(vcpu) || |
948 | (kvm_arch_fault_in_sync(vcpu) >= 0)) | |
24eb3a82 DD |
949 | rc = 0; |
950 | } | |
951 | ||
952 | if (rc == -1) { | |
699bde3b CB |
953 | VCPU_EVENT(vcpu, 3, "%s", "fault in sie instruction"); |
954 | trace_kvm_s390_sie_fault(vcpu); | |
955 | rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); | |
1f0d0f09 | 956 | } |
b0c632db | 957 | |
5a32c1af | 958 | memcpy(&vcpu->run->s.regs.gprs[14], &vcpu->arch.sie_block->gg14, 16); |
3fb4c40f | 959 | |
a76ccff6 TH |
960 | if (rc == 0) { |
961 | if (kvm_is_ucontrol(vcpu->kvm)) | |
2955c83f CB |
962 | /* Don't exit for host interrupts. */ |
963 | rc = vcpu->arch.sie_block->icptcode ? -EOPNOTSUPP : 0; | |
a76ccff6 TH |
964 | else |
965 | rc = kvm_handle_sie_intercept(vcpu); | |
966 | } | |
967 | ||
3fb4c40f TH |
968 | return rc; |
969 | } | |
970 | ||
b31288fa KW |
971 | bool kvm_enabled_cmma(void) |
972 | { | |
973 | if (!MACHINE_IS_LPAR) | |
974 | return false; | |
975 | /* only enable for z10 and later */ | |
976 | if (!MACHINE_HAS_EDAT1) | |
977 | return false; | |
978 | return true; | |
979 | } | |
980 | ||
3fb4c40f TH |
981 | static int __vcpu_run(struct kvm_vcpu *vcpu) |
982 | { | |
983 | int rc, exit_reason; | |
984 | ||
800c1065 TH |
985 | /* |
986 | * We try to hold kvm->srcu during most of vcpu_run (except when run- | |
987 | * ning the guest), so that memslots (and other stuff) are protected | |
988 | */ | |
989 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
990 | ||
a76ccff6 TH |
991 | do { |
992 | rc = vcpu_pre_run(vcpu); | |
993 | if (rc) | |
994 | break; | |
3fb4c40f | 995 | |
800c1065 | 996 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
a76ccff6 TH |
997 | /* |
998 | * As PF_VCPU will be used in fault handler, between | |
999 | * guest_enter and guest_exit should be no uaccess. | |
1000 | */ | |
1001 | preempt_disable(); | |
1002 | kvm_guest_enter(); | |
1003 | preempt_enable(); | |
1004 | exit_reason = sie64a(vcpu->arch.sie_block, | |
1005 | vcpu->run->s.regs.gprs); | |
1006 | kvm_guest_exit(); | |
800c1065 | 1007 | vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
a76ccff6 TH |
1008 | |
1009 | rc = vcpu_post_run(vcpu, exit_reason); | |
1010 | } while (!signal_pending(current) && !rc); | |
3fb4c40f | 1011 | |
800c1065 | 1012 | srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
e168bf8d | 1013 | return rc; |
b0c632db HC |
1014 | } |
1015 | ||
1016 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
1017 | { | |
8f2abe6a | 1018 | int rc; |
b0c632db HC |
1019 | sigset_t sigsaved; |
1020 | ||
b0c632db HC |
1021 | if (vcpu->sigset_active) |
1022 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1023 | ||
9e6dabef | 1024 | atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags); |
b0c632db | 1025 | |
8f2abe6a CB |
1026 | switch (kvm_run->exit_reason) { |
1027 | case KVM_EXIT_S390_SIEIC: | |
8f2abe6a | 1028 | case KVM_EXIT_UNKNOWN: |
9ace903d | 1029 | case KVM_EXIT_INTR: |
8f2abe6a | 1030 | case KVM_EXIT_S390_RESET: |
e168bf8d | 1031 | case KVM_EXIT_S390_UCONTROL: |
fa6b7fe9 | 1032 | case KVM_EXIT_S390_TSCH: |
8f2abe6a CB |
1033 | break; |
1034 | default: | |
1035 | BUG(); | |
1036 | } | |
1037 | ||
d7b0b5eb CO |
1038 | vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; |
1039 | vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; | |
60b413c9 CB |
1040 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { |
1041 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; | |
1042 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
1043 | } | |
9eed0735 CB |
1044 | if (kvm_run->kvm_dirty_regs & KVM_SYNC_CRS) { |
1045 | kvm_run->kvm_dirty_regs &= ~KVM_SYNC_CRS; | |
1046 | memcpy(&vcpu->arch.sie_block->gcr, &kvm_run->s.regs.crs, 128); | |
1047 | kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); | |
1048 | } | |
d7b0b5eb | 1049 | |
dab4079d | 1050 | might_fault(); |
a76ccff6 | 1051 | rc = __vcpu_run(vcpu); |
9ace903d | 1052 | |
b1d16c49 CE |
1053 | if (signal_pending(current) && !rc) { |
1054 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
8f2abe6a | 1055 | rc = -EINTR; |
b1d16c49 | 1056 | } |
8f2abe6a | 1057 | |
b8e660b8 | 1058 | if (rc == -EOPNOTSUPP) { |
8f2abe6a CB |
1059 | /* intercept cannot be handled in-kernel, prepare kvm-run */ |
1060 | kvm_run->exit_reason = KVM_EXIT_S390_SIEIC; | |
1061 | kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode; | |
8f2abe6a CB |
1062 | kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa; |
1063 | kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb; | |
1064 | rc = 0; | |
1065 | } | |
1066 | ||
1067 | if (rc == -EREMOTE) { | |
1068 | /* intercept was handled, but userspace support is needed | |
1069 | * kvm_run has been prepared by the handler */ | |
1070 | rc = 0; | |
1071 | } | |
b0c632db | 1072 | |
d7b0b5eb CO |
1073 | kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; |
1074 | kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; | |
60b413c9 | 1075 | kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; |
9eed0735 | 1076 | memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128); |
d7b0b5eb | 1077 | |
b0c632db HC |
1078 | if (vcpu->sigset_active) |
1079 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1080 | ||
b0c632db | 1081 | vcpu->stat.exit_userspace++; |
7e8e6ab4 | 1082 | return rc; |
b0c632db HC |
1083 | } |
1084 | ||
092670cd | 1085 | static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from, |
b0c632db HC |
1086 | unsigned long n, int prefix) |
1087 | { | |
1088 | if (prefix) | |
1089 | return copy_to_guest(vcpu, guestdest, from, n); | |
1090 | else | |
1091 | return copy_to_guest_absolute(vcpu, guestdest, from, n); | |
1092 | } | |
1093 | ||
1094 | /* | |
1095 | * store status at address | |
1096 | * we use have two special cases: | |
1097 | * KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit | |
1098 | * KVM_S390_STORE_STATUS_PREFIXED: -> prefix | |
1099 | */ | |
e879892c | 1100 | int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr) |
b0c632db | 1101 | { |
092670cd | 1102 | unsigned char archmode = 1; |
b0c632db | 1103 | int prefix; |
178bd789 | 1104 | u64 clkcomp; |
b0c632db HC |
1105 | |
1106 | if (addr == KVM_S390_STORE_STATUS_NOADDR) { | |
1107 | if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1)) | |
1108 | return -EFAULT; | |
1109 | addr = SAVE_AREA_BASE; | |
1110 | prefix = 0; | |
1111 | } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) { | |
1112 | if (copy_to_guest(vcpu, 163ul, &archmode, 1)) | |
1113 | return -EFAULT; | |
1114 | addr = SAVE_AREA_BASE; | |
1115 | prefix = 1; | |
1116 | } else | |
1117 | prefix = 0; | |
1118 | ||
f64ca217 | 1119 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs), |
b0c632db HC |
1120 | vcpu->arch.guest_fpregs.fprs, 128, prefix)) |
1121 | return -EFAULT; | |
1122 | ||
f64ca217 | 1123 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs), |
5a32c1af | 1124 | vcpu->run->s.regs.gprs, 128, prefix)) |
b0c632db HC |
1125 | return -EFAULT; |
1126 | ||
f64ca217 | 1127 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw), |
b0c632db HC |
1128 | &vcpu->arch.sie_block->gpsw, 16, prefix)) |
1129 | return -EFAULT; | |
1130 | ||
f64ca217 | 1131 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg), |
b0c632db HC |
1132 | &vcpu->arch.sie_block->prefix, 4, prefix)) |
1133 | return -EFAULT; | |
1134 | ||
1135 | if (__guestcopy(vcpu, | |
f64ca217 | 1136 | addr + offsetof(struct save_area, fp_ctrl_reg), |
b0c632db HC |
1137 | &vcpu->arch.guest_fpregs.fpc, 4, prefix)) |
1138 | return -EFAULT; | |
1139 | ||
f64ca217 | 1140 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg), |
b0c632db HC |
1141 | &vcpu->arch.sie_block->todpr, 4, prefix)) |
1142 | return -EFAULT; | |
1143 | ||
f64ca217 | 1144 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer), |
b0c632db HC |
1145 | &vcpu->arch.sie_block->cputm, 8, prefix)) |
1146 | return -EFAULT; | |
1147 | ||
178bd789 | 1148 | clkcomp = vcpu->arch.sie_block->ckc >> 8; |
f64ca217 | 1149 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp), |
178bd789 | 1150 | &clkcomp, 8, prefix)) |
b0c632db HC |
1151 | return -EFAULT; |
1152 | ||
f64ca217 | 1153 | if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs), |
59674c1a | 1154 | &vcpu->run->s.regs.acrs, 64, prefix)) |
b0c632db HC |
1155 | return -EFAULT; |
1156 | ||
1157 | if (__guestcopy(vcpu, | |
f64ca217 | 1158 | addr + offsetof(struct save_area, ctrl_regs), |
b0c632db HC |
1159 | &vcpu->arch.sie_block->gcr, 128, prefix)) |
1160 | return -EFAULT; | |
1161 | return 0; | |
1162 | } | |
1163 | ||
e879892c TH |
1164 | int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr) |
1165 | { | |
1166 | /* | |
1167 | * The guest FPRS and ACRS are in the host FPRS/ACRS due to the lazy | |
1168 | * copying in vcpu load/put. Lets update our copies before we save | |
1169 | * it into the save area | |
1170 | */ | |
1171 | save_fp_ctl(&vcpu->arch.guest_fpregs.fpc); | |
1172 | save_fp_regs(vcpu->arch.guest_fpregs.fprs); | |
1173 | save_access_regs(vcpu->run->s.regs.acrs); | |
1174 | ||
1175 | return kvm_s390_store_status_unloaded(vcpu, addr); | |
1176 | } | |
1177 | ||
d6712df9 CH |
1178 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
1179 | struct kvm_enable_cap *cap) | |
1180 | { | |
1181 | int r; | |
1182 | ||
1183 | if (cap->flags) | |
1184 | return -EINVAL; | |
1185 | ||
1186 | switch (cap->cap) { | |
fa6b7fe9 CH |
1187 | case KVM_CAP_S390_CSS_SUPPORT: |
1188 | if (!vcpu->kvm->arch.css_support) { | |
1189 | vcpu->kvm->arch.css_support = 1; | |
1190 | trace_kvm_s390_enable_css(vcpu->kvm); | |
1191 | } | |
1192 | r = 0; | |
1193 | break; | |
d6712df9 CH |
1194 | default: |
1195 | r = -EINVAL; | |
1196 | break; | |
1197 | } | |
1198 | return r; | |
1199 | } | |
1200 | ||
b0c632db HC |
1201 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1202 | unsigned int ioctl, unsigned long arg) | |
1203 | { | |
1204 | struct kvm_vcpu *vcpu = filp->private_data; | |
1205 | void __user *argp = (void __user *)arg; | |
800c1065 | 1206 | int idx; |
bc923cc9 | 1207 | long r; |
b0c632db | 1208 | |
93736624 AK |
1209 | switch (ioctl) { |
1210 | case KVM_S390_INTERRUPT: { | |
ba5c1e9b CO |
1211 | struct kvm_s390_interrupt s390int; |
1212 | ||
93736624 | 1213 | r = -EFAULT; |
ba5c1e9b | 1214 | if (copy_from_user(&s390int, argp, sizeof(s390int))) |
93736624 AK |
1215 | break; |
1216 | r = kvm_s390_inject_vcpu(vcpu, &s390int); | |
1217 | break; | |
ba5c1e9b | 1218 | } |
b0c632db | 1219 | case KVM_S390_STORE_STATUS: |
800c1065 | 1220 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
bc923cc9 | 1221 | r = kvm_s390_vcpu_store_status(vcpu, arg); |
800c1065 | 1222 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
bc923cc9 | 1223 | break; |
b0c632db HC |
1224 | case KVM_S390_SET_INITIAL_PSW: { |
1225 | psw_t psw; | |
1226 | ||
bc923cc9 | 1227 | r = -EFAULT; |
b0c632db | 1228 | if (copy_from_user(&psw, argp, sizeof(psw))) |
bc923cc9 AK |
1229 | break; |
1230 | r = kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw); | |
1231 | break; | |
b0c632db HC |
1232 | } |
1233 | case KVM_S390_INITIAL_RESET: | |
bc923cc9 AK |
1234 | r = kvm_arch_vcpu_ioctl_initial_reset(vcpu); |
1235 | break; | |
14eebd91 CO |
1236 | case KVM_SET_ONE_REG: |
1237 | case KVM_GET_ONE_REG: { | |
1238 | struct kvm_one_reg reg; | |
1239 | r = -EFAULT; | |
1240 | if (copy_from_user(®, argp, sizeof(reg))) | |
1241 | break; | |
1242 | if (ioctl == KVM_SET_ONE_REG) | |
1243 | r = kvm_arch_vcpu_ioctl_set_one_reg(vcpu, ®); | |
1244 | else | |
1245 | r = kvm_arch_vcpu_ioctl_get_one_reg(vcpu, ®); | |
1246 | break; | |
1247 | } | |
27e0393f CO |
1248 | #ifdef CONFIG_KVM_S390_UCONTROL |
1249 | case KVM_S390_UCAS_MAP: { | |
1250 | struct kvm_s390_ucas_mapping ucasmap; | |
1251 | ||
1252 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1253 | r = -EFAULT; | |
1254 | break; | |
1255 | } | |
1256 | ||
1257 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1258 | r = -EINVAL; | |
1259 | break; | |
1260 | } | |
1261 | ||
1262 | r = gmap_map_segment(vcpu->arch.gmap, ucasmap.user_addr, | |
1263 | ucasmap.vcpu_addr, ucasmap.length); | |
1264 | break; | |
1265 | } | |
1266 | case KVM_S390_UCAS_UNMAP: { | |
1267 | struct kvm_s390_ucas_mapping ucasmap; | |
1268 | ||
1269 | if (copy_from_user(&ucasmap, argp, sizeof(ucasmap))) { | |
1270 | r = -EFAULT; | |
1271 | break; | |
1272 | } | |
1273 | ||
1274 | if (!kvm_is_ucontrol(vcpu->kvm)) { | |
1275 | r = -EINVAL; | |
1276 | break; | |
1277 | } | |
1278 | ||
1279 | r = gmap_unmap_segment(vcpu->arch.gmap, ucasmap.vcpu_addr, | |
1280 | ucasmap.length); | |
1281 | break; | |
1282 | } | |
1283 | #endif | |
ccc7910f CO |
1284 | case KVM_S390_VCPU_FAULT: { |
1285 | r = gmap_fault(arg, vcpu->arch.gmap); | |
1286 | if (!IS_ERR_VALUE(r)) | |
1287 | r = 0; | |
1288 | break; | |
1289 | } | |
d6712df9 CH |
1290 | case KVM_ENABLE_CAP: |
1291 | { | |
1292 | struct kvm_enable_cap cap; | |
1293 | r = -EFAULT; | |
1294 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
1295 | break; | |
1296 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
1297 | break; | |
1298 | } | |
b0c632db | 1299 | default: |
3e6afcf1 | 1300 | r = -ENOTTY; |
b0c632db | 1301 | } |
bc923cc9 | 1302 | return r; |
b0c632db HC |
1303 | } |
1304 | ||
5b1c1493 CO |
1305 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
1306 | { | |
1307 | #ifdef CONFIG_KVM_S390_UCONTROL | |
1308 | if ((vmf->pgoff == KVM_S390_SIE_PAGE_OFFSET) | |
1309 | && (kvm_is_ucontrol(vcpu->kvm))) { | |
1310 | vmf->page = virt_to_page(vcpu->arch.sie_block); | |
1311 | get_page(vmf->page); | |
1312 | return 0; | |
1313 | } | |
1314 | #endif | |
1315 | return VM_FAULT_SIGBUS; | |
1316 | } | |
1317 | ||
5587027c | 1318 | void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
db3fe4eb TY |
1319 | struct kvm_memory_slot *dont) |
1320 | { | |
1321 | } | |
1322 | ||
5587027c AK |
1323 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
1324 | unsigned long npages) | |
db3fe4eb TY |
1325 | { |
1326 | return 0; | |
1327 | } | |
1328 | ||
e59dbe09 TY |
1329 | void kvm_arch_memslots_updated(struct kvm *kvm) |
1330 | { | |
1331 | } | |
1332 | ||
b0c632db | 1333 | /* Section: memory related */ |
f7784b8e MT |
1334 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
1335 | struct kvm_memory_slot *memslot, | |
7b6195a9 TY |
1336 | struct kvm_userspace_memory_region *mem, |
1337 | enum kvm_mr_change change) | |
b0c632db | 1338 | { |
dd2887e7 NW |
1339 | /* A few sanity checks. We can have memory slots which have to be |
1340 | located/ended at a segment boundary (1MB). The memory in userland is | |
1341 | ok to be fragmented into various different vmas. It is okay to mmap() | |
1342 | and munmap() stuff in this slot after doing this call at any time */ | |
b0c632db | 1343 | |
598841ca | 1344 | if (mem->userspace_addr & 0xffffful) |
b0c632db HC |
1345 | return -EINVAL; |
1346 | ||
598841ca | 1347 | if (mem->memory_size & 0xffffful) |
b0c632db HC |
1348 | return -EINVAL; |
1349 | ||
f7784b8e MT |
1350 | return 0; |
1351 | } | |
1352 | ||
1353 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
1354 | struct kvm_userspace_memory_region *mem, | |
8482644a TY |
1355 | const struct kvm_memory_slot *old, |
1356 | enum kvm_mr_change change) | |
f7784b8e | 1357 | { |
f7850c92 | 1358 | int rc; |
f7784b8e | 1359 | |
2cef4deb CB |
1360 | /* If the basics of the memslot do not change, we do not want |
1361 | * to update the gmap. Every update causes several unnecessary | |
1362 | * segment translation exceptions. This is usually handled just | |
1363 | * fine by the normal fault handler + gmap, but it will also | |
1364 | * cause faults on the prefix page of running guest CPUs. | |
1365 | */ | |
1366 | if (old->userspace_addr == mem->userspace_addr && | |
1367 | old->base_gfn * PAGE_SIZE == mem->guest_phys_addr && | |
1368 | old->npages * PAGE_SIZE == mem->memory_size) | |
1369 | return; | |
598841ca CO |
1370 | |
1371 | rc = gmap_map_segment(kvm->arch.gmap, mem->userspace_addr, | |
1372 | mem->guest_phys_addr, mem->memory_size); | |
1373 | if (rc) | |
f7850c92 | 1374 | printk(KERN_WARNING "kvm-s390: failed to commit memory region\n"); |
598841ca | 1375 | return; |
b0c632db HC |
1376 | } |
1377 | ||
2df72e9b MT |
1378 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
1379 | { | |
1380 | } | |
1381 | ||
1382 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, | |
1383 | struct kvm_memory_slot *slot) | |
34d4cb8f MT |
1384 | { |
1385 | } | |
1386 | ||
b0c632db HC |
1387 | static int __init kvm_s390_init(void) |
1388 | { | |
ef50f7ac | 1389 | int ret; |
0ee75bea | 1390 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
ef50f7ac CB |
1391 | if (ret) |
1392 | return ret; | |
1393 | ||
1394 | /* | |
1395 | * guests can ask for up to 255+1 double words, we need a full page | |
25985edc | 1396 | * to hold the maximum amount of facilities. On the other hand, we |
ef50f7ac CB |
1397 | * only set facilities that are known to work in KVM. |
1398 | */ | |
78c4b59f MM |
1399 | vfacilities = (unsigned long *) get_zeroed_page(GFP_KERNEL|GFP_DMA); |
1400 | if (!vfacilities) { | |
ef50f7ac CB |
1401 | kvm_exit(); |
1402 | return -ENOMEM; | |
1403 | } | |
78c4b59f | 1404 | memcpy(vfacilities, S390_lowcore.stfle_fac_list, 16); |
d208c79d | 1405 | vfacilities[0] &= 0xff82fff3f4fc2000UL; |
7feb6bb8 | 1406 | vfacilities[1] &= 0x005c000000000000UL; |
ef50f7ac | 1407 | return 0; |
b0c632db HC |
1408 | } |
1409 | ||
1410 | static void __exit kvm_s390_exit(void) | |
1411 | { | |
78c4b59f | 1412 | free_page((unsigned long) vfacilities); |
b0c632db HC |
1413 | kvm_exit(); |
1414 | } | |
1415 | ||
1416 | module_init(kvm_s390_init); | |
1417 | module_exit(kvm_s390_exit); | |
566af940 CH |
1418 | |
1419 | /* | |
1420 | * Enable autoloading of the kvm module. | |
1421 | * Note that we add the module alias here instead of virt/kvm/kvm_main.c | |
1422 | * since x86 takes a different approach. | |
1423 | */ | |
1424 | #include <linux/miscdevice.h> | |
1425 | MODULE_ALIAS_MISCDEV(KVM_MINOR); | |
1426 | MODULE_ALIAS("devname:kvm"); |