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bbf45ba5 HB |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License, version 2, as | |
4 | * published by the Free Software Foundation. | |
5 | * | |
6 | * This program is distributed in the hope that it will be useful, | |
7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
9 | * GNU General Public License for more details. | |
10 | * | |
11 | * You should have received a copy of the GNU General Public License | |
12 | * along with this program; if not, write to the Free Software | |
13 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
14 | * | |
15 | * Copyright IBM Corp. 2007 | |
16 | * | |
17 | * Authors: Hollis Blanchard <hollisb@us.ibm.com> | |
18 | * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> | |
19 | */ | |
20 | ||
21 | #include <linux/errno.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/kvm_host.h> | |
bbf45ba5 | 24 | #include <linux/vmalloc.h> |
544c6761 | 25 | #include <linux/hrtimer.h> |
bbf45ba5 | 26 | #include <linux/fs.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
bbf45ba5 HB |
28 | #include <asm/cputable.h> |
29 | #include <asm/uaccess.h> | |
30 | #include <asm/kvm_ppc.h> | |
83aae4a8 | 31 | #include <asm/tlbflush.h> |
371fefd6 | 32 | #include <asm/cputhreads.h> |
bd2be683 | 33 | #include <asm/irqflags.h> |
73e75b41 | 34 | #include "timing.h" |
fad7b9b5 | 35 | #include "../mm/mmu_decl.h" |
bbf45ba5 | 36 | |
46f43c6e MT |
37 | #define CREATE_TRACE_POINTS |
38 | #include "trace.h" | |
39 | ||
bbf45ba5 HB |
40 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
41 | { | |
9202e076 | 42 | return !!(v->arch.pending_exceptions) || |
dfd4d47e | 43 | v->requests; |
bbf45ba5 HB |
44 | } |
45 | ||
b6d33834 CD |
46 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
47 | { | |
48 | return 1; | |
49 | } | |
50 | ||
03d25c5b AG |
51 | #ifndef CONFIG_KVM_BOOK3S_64_HV |
52 | /* | |
53 | * Common checks before entering the guest world. Call with interrupts | |
54 | * disabled. | |
55 | * | |
7ee78855 AG |
56 | * returns: |
57 | * | |
58 | * == 1 if we're ready to go into guest state | |
59 | * <= 0 if we need to go back to the host with return value | |
03d25c5b AG |
60 | */ |
61 | int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) | |
62 | { | |
7ee78855 | 63 | int r = 1; |
03d25c5b AG |
64 | |
65 | WARN_ON_ONCE(!irqs_disabled()); | |
66 | while (true) { | |
67 | if (need_resched()) { | |
68 | local_irq_enable(); | |
69 | cond_resched(); | |
70 | local_irq_disable(); | |
71 | continue; | |
72 | } | |
73 | ||
74 | if (signal_pending(current)) { | |
7ee78855 AG |
75 | kvmppc_account_exit(vcpu, SIGNAL_EXITS); |
76 | vcpu->run->exit_reason = KVM_EXIT_INTR; | |
77 | r = -EINTR; | |
03d25c5b AG |
78 | break; |
79 | } | |
80 | ||
5bd1cf11 SW |
81 | vcpu->mode = IN_GUEST_MODE; |
82 | ||
83 | /* | |
84 | * Reading vcpu->requests must happen after setting vcpu->mode, | |
85 | * so we don't miss a request because the requester sees | |
86 | * OUTSIDE_GUEST_MODE and assumes we'll be checking requests | |
87 | * before next entering the guest (and thus doesn't IPI). | |
88 | */ | |
03d25c5b | 89 | smp_mb(); |
5bd1cf11 | 90 | |
03d25c5b AG |
91 | if (vcpu->requests) { |
92 | /* Make sure we process requests preemptable */ | |
93 | local_irq_enable(); | |
94 | trace_kvm_check_requests(vcpu); | |
7c973a2e | 95 | r = kvmppc_core_check_requests(vcpu); |
03d25c5b | 96 | local_irq_disable(); |
7c973a2e AG |
97 | if (r > 0) |
98 | continue; | |
99 | break; | |
03d25c5b AG |
100 | } |
101 | ||
102 | if (kvmppc_core_prepare_to_enter(vcpu)) { | |
103 | /* interrupts got enabled in between, so we | |
104 | are back at square 1 */ | |
105 | continue; | |
106 | } | |
107 | ||
bd2be683 AG |
108 | #ifdef CONFIG_PPC64 |
109 | /* lazy EE magic */ | |
110 | hard_irq_disable(); | |
111 | if (lazy_irq_pending()) { | |
112 | /* Got an interrupt in between, try again */ | |
113 | local_irq_enable(); | |
114 | local_irq_disable(); | |
3766a4c6 | 115 | kvm_guest_exit(); |
bd2be683 AG |
116 | continue; |
117 | } | |
118 | ||
119 | trace_hardirqs_on(); | |
120 | #endif | |
121 | ||
3766a4c6 | 122 | kvm_guest_enter(); |
03d25c5b AG |
123 | break; |
124 | } | |
125 | ||
126 | return r; | |
127 | } | |
128 | #endif /* CONFIG_KVM_BOOK3S_64_HV */ | |
129 | ||
2a342ed5 AG |
130 | int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) |
131 | { | |
132 | int nr = kvmppc_get_gpr(vcpu, 11); | |
133 | int r; | |
134 | unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3); | |
135 | unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4); | |
136 | unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5); | |
137 | unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6); | |
138 | unsigned long r2 = 0; | |
139 | ||
140 | if (!(vcpu->arch.shared->msr & MSR_SF)) { | |
141 | /* 32 bit mode */ | |
142 | param1 &= 0xffffffff; | |
143 | param2 &= 0xffffffff; | |
144 | param3 &= 0xffffffff; | |
145 | param4 &= 0xffffffff; | |
146 | } | |
147 | ||
148 | switch (nr) { | |
fdcf8bd7 | 149 | case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE): |
5fc87407 AG |
150 | { |
151 | vcpu->arch.magic_page_pa = param1; | |
152 | vcpu->arch.magic_page_ea = param2; | |
153 | ||
b5904972 | 154 | r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7; |
7508e16c | 155 | |
fdcf8bd7 | 156 | r = EV_SUCCESS; |
5fc87407 AG |
157 | break; |
158 | } | |
fdcf8bd7 SY |
159 | case KVM_HCALL_TOKEN(KVM_HC_FEATURES): |
160 | r = EV_SUCCESS; | |
bf7ca4bd | 161 | #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2) |
a4cd8b23 | 162 | /* XXX Missing magic page on 44x */ |
5fc87407 AG |
163 | r2 |= (1 << KVM_FEATURE_MAGIC_PAGE); |
164 | #endif | |
2a342ed5 AG |
165 | |
166 | /* Second return value is in r4 */ | |
2a342ed5 | 167 | break; |
9202e076 LYB |
168 | case EV_HCALL_TOKEN(EV_IDLE): |
169 | r = EV_SUCCESS; | |
170 | kvm_vcpu_block(vcpu); | |
171 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
172 | break; | |
2a342ed5 | 173 | default: |
fdcf8bd7 | 174 | r = EV_UNIMPLEMENTED; |
2a342ed5 AG |
175 | break; |
176 | } | |
177 | ||
7508e16c AG |
178 | kvmppc_set_gpr(vcpu, 4, r2); |
179 | ||
2a342ed5 AG |
180 | return r; |
181 | } | |
bbf45ba5 | 182 | |
af8f38b3 AG |
183 | int kvmppc_sanity_check(struct kvm_vcpu *vcpu) |
184 | { | |
185 | int r = false; | |
186 | ||
187 | /* We have to know what CPU to virtualize */ | |
188 | if (!vcpu->arch.pvr) | |
189 | goto out; | |
190 | ||
191 | /* PAPR only works with book3s_64 */ | |
192 | if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled) | |
193 | goto out; | |
194 | ||
195 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
196 | /* HV KVM can only do PAPR mode for now */ | |
197 | if (!vcpu->arch.papr_enabled) | |
198 | goto out; | |
199 | #endif | |
200 | ||
d30f6e48 SW |
201 | #ifdef CONFIG_KVM_BOOKE_HV |
202 | if (!cpu_has_feature(CPU_FTR_EMB_HV)) | |
203 | goto out; | |
204 | #endif | |
205 | ||
af8f38b3 AG |
206 | r = true; |
207 | ||
208 | out: | |
209 | vcpu->arch.sane = r; | |
210 | return r ? 0 : -EINVAL; | |
211 | } | |
212 | ||
bbf45ba5 HB |
213 | int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) |
214 | { | |
215 | enum emulation_result er; | |
216 | int r; | |
217 | ||
218 | er = kvmppc_emulate_instruction(run, vcpu); | |
219 | switch (er) { | |
220 | case EMULATE_DONE: | |
221 | /* Future optimization: only reload non-volatiles if they were | |
222 | * actually modified. */ | |
223 | r = RESUME_GUEST_NV; | |
224 | break; | |
225 | case EMULATE_DO_MMIO: | |
226 | run->exit_reason = KVM_EXIT_MMIO; | |
227 | /* We must reload nonvolatiles because "update" load/store | |
228 | * instructions modify register state. */ | |
229 | /* Future optimization: only reload non-volatiles if they were | |
230 | * actually modified. */ | |
231 | r = RESUME_HOST_NV; | |
232 | break; | |
233 | case EMULATE_FAIL: | |
234 | /* XXX Deliver Program interrupt to guest. */ | |
235 | printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__, | |
c7f38f46 | 236 | kvmppc_get_last_inst(vcpu)); |
bbf45ba5 HB |
237 | r = RESUME_HOST; |
238 | break; | |
239 | default: | |
5a33169e AG |
240 | WARN_ON(1); |
241 | r = RESUME_GUEST; | |
bbf45ba5 HB |
242 | } |
243 | ||
244 | return r; | |
245 | } | |
246 | ||
10474ae8 | 247 | int kvm_arch_hardware_enable(void *garbage) |
bbf45ba5 | 248 | { |
10474ae8 | 249 | return 0; |
bbf45ba5 HB |
250 | } |
251 | ||
252 | void kvm_arch_hardware_disable(void *garbage) | |
253 | { | |
254 | } | |
255 | ||
256 | int kvm_arch_hardware_setup(void) | |
257 | { | |
258 | return 0; | |
259 | } | |
260 | ||
261 | void kvm_arch_hardware_unsetup(void) | |
262 | { | |
263 | } | |
264 | ||
265 | void kvm_arch_check_processor_compat(void *rtn) | |
266 | { | |
9dd921cf | 267 | *(int *)rtn = kvmppc_core_check_processor_compat(); |
bbf45ba5 HB |
268 | } |
269 | ||
e08b9637 | 270 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
bbf45ba5 | 271 | { |
e08b9637 CO |
272 | if (type) |
273 | return -EINVAL; | |
274 | ||
f9e0554d | 275 | return kvmppc_core_init_vm(kvm); |
bbf45ba5 HB |
276 | } |
277 | ||
d89f5eff | 278 | void kvm_arch_destroy_vm(struct kvm *kvm) |
bbf45ba5 HB |
279 | { |
280 | unsigned int i; | |
988a2cae | 281 | struct kvm_vcpu *vcpu; |
bbf45ba5 | 282 | |
988a2cae GN |
283 | kvm_for_each_vcpu(i, vcpu, kvm) |
284 | kvm_arch_vcpu_free(vcpu); | |
285 | ||
286 | mutex_lock(&kvm->lock); | |
287 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
288 | kvm->vcpus[i] = NULL; | |
289 | ||
290 | atomic_set(&kvm->online_vcpus, 0); | |
f9e0554d PM |
291 | |
292 | kvmppc_core_destroy_vm(kvm); | |
293 | ||
988a2cae | 294 | mutex_unlock(&kvm->lock); |
bbf45ba5 HB |
295 | } |
296 | ||
ad8ba2cd SY |
297 | void kvm_arch_sync_events(struct kvm *kvm) |
298 | { | |
299 | } | |
300 | ||
bbf45ba5 HB |
301 | int kvm_dev_ioctl_check_extension(long ext) |
302 | { | |
303 | int r; | |
304 | ||
305 | switch (ext) { | |
5ce941ee SW |
306 | #ifdef CONFIG_BOOKE |
307 | case KVM_CAP_PPC_BOOKE_SREGS: | |
f61c94bb | 308 | case KVM_CAP_PPC_BOOKE_WATCHDOG: |
1c810636 | 309 | case KVM_CAP_PPC_EPR: |
5ce941ee | 310 | #else |
e15a1137 | 311 | case KVM_CAP_PPC_SEGSTATE: |
1022fc3d | 312 | case KVM_CAP_PPC_HIOR: |
930b412a | 313 | case KVM_CAP_PPC_PAPR: |
5ce941ee | 314 | #endif |
18978768 | 315 | case KVM_CAP_PPC_UNSET_IRQ: |
7b4203e8 | 316 | case KVM_CAP_PPC_IRQ_LEVEL: |
71fbfd5f | 317 | case KVM_CAP_ENABLE_CAP: |
e24ed81f | 318 | case KVM_CAP_ONE_REG: |
0e673fb6 | 319 | case KVM_CAP_IOEVENTFD: |
5df554ad | 320 | case KVM_CAP_DEVICE_CTRL: |
de56a948 PM |
321 | r = 1; |
322 | break; | |
323 | #ifndef CONFIG_KVM_BOOK3S_64_HV | |
324 | case KVM_CAP_PPC_PAIRED_SINGLES: | |
ad0a048b | 325 | case KVM_CAP_PPC_OSI: |
15711e9c | 326 | case KVM_CAP_PPC_GET_PVINFO: |
bf7ca4bd | 327 | #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) |
dc83b8bc SW |
328 | case KVM_CAP_SW_TLB: |
329 | #endif | |
e15a1137 AG |
330 | r = 1; |
331 | break; | |
588968b6 LV |
332 | case KVM_CAP_COALESCED_MMIO: |
333 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
334 | break; | |
54738c09 | 335 | #endif |
f31e65e1 | 336 | #ifdef CONFIG_PPC_BOOK3S_64 |
54738c09 | 337 | case KVM_CAP_SPAPR_TCE: |
32fad281 | 338 | case KVM_CAP_PPC_ALLOC_HTAB: |
54738c09 DG |
339 | r = 1; |
340 | break; | |
f31e65e1 BH |
341 | #endif /* CONFIG_PPC_BOOK3S_64 */ |
342 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
371fefd6 PM |
343 | case KVM_CAP_PPC_SMT: |
344 | r = threads_per_core; | |
345 | break; | |
aa04b4cc PM |
346 | case KVM_CAP_PPC_RMA: |
347 | r = 1; | |
9e368f29 PM |
348 | /* PPC970 requires an RMA */ |
349 | if (cpu_has_feature(CPU_FTR_ARCH_201)) | |
350 | r = 2; | |
aa04b4cc | 351 | break; |
f4800b1f | 352 | #endif |
342d3db7 | 353 | case KVM_CAP_SYNC_MMU: |
f4800b1f | 354 | #ifdef CONFIG_KVM_BOOK3S_64_HV |
342d3db7 | 355 | r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0; |
f4800b1f AG |
356 | #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
357 | r = 1; | |
358 | #else | |
359 | r = 0; | |
a2932923 PM |
360 | break; |
361 | #endif | |
362 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
363 | case KVM_CAP_PPC_HTAB_FD: | |
364 | r = 1; | |
365 | break; | |
de56a948 | 366 | #endif |
f4800b1f | 367 | break; |
b5434032 ME |
368 | case KVM_CAP_NR_VCPUS: |
369 | /* | |
370 | * Recommending a number of CPUs is somewhat arbitrary; we | |
371 | * return the number of present CPUs for -HV (since a host | |
372 | * will have secondary threads "offline"), and for other KVM | |
373 | * implementations just count online CPUs. | |
374 | */ | |
375 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
376 | r = num_present_cpus(); | |
377 | #else | |
378 | r = num_online_cpus(); | |
379 | #endif | |
380 | break; | |
381 | case KVM_CAP_MAX_VCPUS: | |
382 | r = KVM_MAX_VCPUS; | |
383 | break; | |
5b74716e BH |
384 | #ifdef CONFIG_PPC_BOOK3S_64 |
385 | case KVM_CAP_PPC_GET_SMMU_INFO: | |
386 | r = 1; | |
387 | break; | |
388 | #endif | |
bbf45ba5 HB |
389 | default: |
390 | r = 0; | |
391 | break; | |
392 | } | |
393 | return r; | |
394 | ||
395 | } | |
396 | ||
397 | long kvm_arch_dev_ioctl(struct file *filp, | |
398 | unsigned int ioctl, unsigned long arg) | |
399 | { | |
400 | return -EINVAL; | |
401 | } | |
402 | ||
db3fe4eb TY |
403 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, |
404 | struct kvm_memory_slot *dont) | |
405 | { | |
a66b48c3 | 406 | kvmppc_core_free_memslot(free, dont); |
db3fe4eb TY |
407 | } |
408 | ||
409 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) | |
410 | { | |
a66b48c3 | 411 | return kvmppc_core_create_memslot(slot, npages); |
db3fe4eb TY |
412 | } |
413 | ||
f7784b8e | 414 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
462fce46 | 415 | struct kvm_memory_slot *memslot, |
7b6195a9 TY |
416 | struct kvm_userspace_memory_region *mem, |
417 | enum kvm_mr_change change) | |
bbf45ba5 | 418 | { |
a66b48c3 | 419 | return kvmppc_core_prepare_memory_region(kvm, memslot, mem); |
bbf45ba5 HB |
420 | } |
421 | ||
f7784b8e | 422 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
462fce46 | 423 | struct kvm_userspace_memory_region *mem, |
8482644a TY |
424 | const struct kvm_memory_slot *old, |
425 | enum kvm_mr_change change) | |
f7784b8e | 426 | { |
dfe49dbd | 427 | kvmppc_core_commit_memory_region(kvm, mem, old); |
f7784b8e MT |
428 | } |
429 | ||
2df72e9b MT |
430 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
431 | { | |
432 | } | |
f7784b8e | 433 | |
2df72e9b MT |
434 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
435 | struct kvm_memory_slot *slot) | |
34d4cb8f | 436 | { |
dfe49dbd | 437 | kvmppc_core_flush_memslot(kvm, slot); |
34d4cb8f MT |
438 | } |
439 | ||
bbf45ba5 HB |
440 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) |
441 | { | |
73e75b41 HB |
442 | struct kvm_vcpu *vcpu; |
443 | vcpu = kvmppc_core_vcpu_create(kvm, id); | |
03cdab53 ME |
444 | if (!IS_ERR(vcpu)) { |
445 | vcpu->arch.wqp = &vcpu->wq; | |
06056bfb | 446 | kvmppc_create_vcpu_debugfs(vcpu, id); |
03cdab53 | 447 | } |
73e75b41 | 448 | return vcpu; |
bbf45ba5 HB |
449 | } |
450 | ||
42897d86 MT |
451 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
452 | { | |
453 | return 0; | |
454 | } | |
455 | ||
bbf45ba5 HB |
456 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) |
457 | { | |
a595405d AG |
458 | /* Make sure we're not using the vcpu anymore */ |
459 | hrtimer_cancel(&vcpu->arch.dec_timer); | |
460 | tasklet_kill(&vcpu->arch.tasklet); | |
461 | ||
73e75b41 | 462 | kvmppc_remove_vcpu_debugfs(vcpu); |
db93f574 | 463 | kvmppc_core_vcpu_free(vcpu); |
bbf45ba5 HB |
464 | } |
465 | ||
466 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
467 | { | |
468 | kvm_arch_vcpu_free(vcpu); | |
469 | } | |
470 | ||
471 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
472 | { | |
9dd921cf | 473 | return kvmppc_core_pending_dec(vcpu); |
bbf45ba5 HB |
474 | } |
475 | ||
544c6761 AG |
476 | /* |
477 | * low level hrtimer wake routine. Because this runs in hardirq context | |
478 | * we schedule a tasklet to do the real work. | |
479 | */ | |
480 | enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer) | |
481 | { | |
482 | struct kvm_vcpu *vcpu; | |
483 | ||
484 | vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer); | |
485 | tasklet_schedule(&vcpu->arch.tasklet); | |
486 | ||
487 | return HRTIMER_NORESTART; | |
488 | } | |
489 | ||
bbf45ba5 HB |
490 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
491 | { | |
f61c94bb BB |
492 | int ret; |
493 | ||
544c6761 AG |
494 | hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
495 | tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu); | |
496 | vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup; | |
de56a948 | 497 | vcpu->arch.dec_expires = ~(u64)0; |
bbf45ba5 | 498 | |
09000adb BB |
499 | #ifdef CONFIG_KVM_EXIT_TIMING |
500 | mutex_init(&vcpu->arch.exit_timing_lock); | |
501 | #endif | |
f61c94bb BB |
502 | ret = kvmppc_subarch_vcpu_init(vcpu); |
503 | return ret; | |
bbf45ba5 HB |
504 | } |
505 | ||
506 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
507 | { | |
ecc0981f | 508 | kvmppc_mmu_destroy(vcpu); |
f61c94bb | 509 | kvmppc_subarch_vcpu_uninit(vcpu); |
bbf45ba5 HB |
510 | } |
511 | ||
512 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
513 | { | |
eab17672 SW |
514 | #ifdef CONFIG_BOOKE |
515 | /* | |
516 | * vrsave (formerly usprg0) isn't used by Linux, but may | |
517 | * be used by the guest. | |
518 | * | |
519 | * On non-booke this is associated with Altivec and | |
520 | * is handled by code in book3s.c. | |
521 | */ | |
522 | mtspr(SPRN_VRSAVE, vcpu->arch.vrsave); | |
523 | #endif | |
9dd921cf | 524 | kvmppc_core_vcpu_load(vcpu, cpu); |
bbf45ba5 HB |
525 | } |
526 | ||
527 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
528 | { | |
9dd921cf | 529 | kvmppc_core_vcpu_put(vcpu); |
eab17672 SW |
530 | #ifdef CONFIG_BOOKE |
531 | vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); | |
532 | #endif | |
bbf45ba5 HB |
533 | } |
534 | ||
bbf45ba5 HB |
535 | static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu, |
536 | struct kvm_run *run) | |
537 | { | |
8e5b26b5 | 538 | kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data); |
bbf45ba5 HB |
539 | } |
540 | ||
541 | static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, | |
542 | struct kvm_run *run) | |
543 | { | |
69b61833 | 544 | u64 uninitialized_var(gpr); |
bbf45ba5 | 545 | |
8e5b26b5 | 546 | if (run->mmio.len > sizeof(gpr)) { |
bbf45ba5 HB |
547 | printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len); |
548 | return; | |
549 | } | |
550 | ||
551 | if (vcpu->arch.mmio_is_bigendian) { | |
552 | switch (run->mmio.len) { | |
b104d066 | 553 | case 8: gpr = *(u64 *)run->mmio.data; break; |
8e5b26b5 AG |
554 | case 4: gpr = *(u32 *)run->mmio.data; break; |
555 | case 2: gpr = *(u16 *)run->mmio.data; break; | |
556 | case 1: gpr = *(u8 *)run->mmio.data; break; | |
bbf45ba5 HB |
557 | } |
558 | } else { | |
559 | /* Convert BE data from userland back to LE. */ | |
560 | switch (run->mmio.len) { | |
8e5b26b5 AG |
561 | case 4: gpr = ld_le32((u32 *)run->mmio.data); break; |
562 | case 2: gpr = ld_le16((u16 *)run->mmio.data); break; | |
563 | case 1: gpr = *(u8 *)run->mmio.data; break; | |
bbf45ba5 HB |
564 | } |
565 | } | |
8e5b26b5 | 566 | |
3587d534 AG |
567 | if (vcpu->arch.mmio_sign_extend) { |
568 | switch (run->mmio.len) { | |
569 | #ifdef CONFIG_PPC64 | |
570 | case 4: | |
571 | gpr = (s64)(s32)gpr; | |
572 | break; | |
573 | #endif | |
574 | case 2: | |
575 | gpr = (s64)(s16)gpr; | |
576 | break; | |
577 | case 1: | |
578 | gpr = (s64)(s8)gpr; | |
579 | break; | |
580 | } | |
581 | } | |
582 | ||
8e5b26b5 | 583 | kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); |
b104d066 | 584 | |
b3c5d3c2 AG |
585 | switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) { |
586 | case KVM_MMIO_REG_GPR: | |
b104d066 AG |
587 | kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); |
588 | break; | |
b3c5d3c2 AG |
589 | case KVM_MMIO_REG_FPR: |
590 | vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
b104d066 | 591 | break; |
287d5611 | 592 | #ifdef CONFIG_PPC_BOOK3S |
b3c5d3c2 AG |
593 | case KVM_MMIO_REG_QPR: |
594 | vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
b104d066 | 595 | break; |
b3c5d3c2 AG |
596 | case KVM_MMIO_REG_FQPR: |
597 | vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
598 | vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
b104d066 | 599 | break; |
287d5611 | 600 | #endif |
b104d066 AG |
601 | default: |
602 | BUG(); | |
603 | } | |
bbf45ba5 HB |
604 | } |
605 | ||
606 | int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
607 | unsigned int rt, unsigned int bytes, int is_bigendian) | |
608 | { | |
609 | if (bytes > sizeof(run->mmio.data)) { | |
610 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
611 | run->mmio.len); | |
612 | } | |
613 | ||
614 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
615 | run->mmio.len = bytes; | |
616 | run->mmio.is_write = 0; | |
617 | ||
618 | vcpu->arch.io_gpr = rt; | |
619 | vcpu->arch.mmio_is_bigendian = is_bigendian; | |
620 | vcpu->mmio_needed = 1; | |
621 | vcpu->mmio_is_write = 0; | |
3587d534 | 622 | vcpu->arch.mmio_sign_extend = 0; |
bbf45ba5 | 623 | |
0e673fb6 AG |
624 | if (!kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr, |
625 | bytes, &run->mmio.data)) { | |
626 | kvmppc_complete_mmio_load(vcpu, run); | |
627 | vcpu->mmio_needed = 0; | |
628 | return EMULATE_DONE; | |
629 | } | |
630 | ||
bbf45ba5 HB |
631 | return EMULATE_DO_MMIO; |
632 | } | |
633 | ||
3587d534 AG |
634 | /* Same as above, but sign extends */ |
635 | int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
636 | unsigned int rt, unsigned int bytes, int is_bigendian) | |
637 | { | |
638 | int r; | |
639 | ||
3587d534 | 640 | vcpu->arch.mmio_sign_extend = 1; |
0e673fb6 | 641 | r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian); |
3587d534 AG |
642 | |
643 | return r; | |
644 | } | |
645 | ||
bbf45ba5 | 646 | int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, |
b104d066 | 647 | u64 val, unsigned int bytes, int is_bigendian) |
bbf45ba5 HB |
648 | { |
649 | void *data = run->mmio.data; | |
650 | ||
651 | if (bytes > sizeof(run->mmio.data)) { | |
652 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
653 | run->mmio.len); | |
654 | } | |
655 | ||
656 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
657 | run->mmio.len = bytes; | |
658 | run->mmio.is_write = 1; | |
659 | vcpu->mmio_needed = 1; | |
660 | vcpu->mmio_is_write = 1; | |
661 | ||
662 | /* Store the value at the lowest bytes in 'data'. */ | |
663 | if (is_bigendian) { | |
664 | switch (bytes) { | |
b104d066 | 665 | case 8: *(u64 *)data = val; break; |
bbf45ba5 HB |
666 | case 4: *(u32 *)data = val; break; |
667 | case 2: *(u16 *)data = val; break; | |
668 | case 1: *(u8 *)data = val; break; | |
669 | } | |
670 | } else { | |
671 | /* Store LE value into 'data'. */ | |
672 | switch (bytes) { | |
673 | case 4: st_le32(data, val); break; | |
674 | case 2: st_le16(data, val); break; | |
675 | case 1: *(u8 *)data = val; break; | |
676 | } | |
677 | } | |
678 | ||
0e673fb6 AG |
679 | if (!kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, run->mmio.phys_addr, |
680 | bytes, &run->mmio.data)) { | |
0e673fb6 AG |
681 | vcpu->mmio_needed = 0; |
682 | return EMULATE_DONE; | |
683 | } | |
684 | ||
bbf45ba5 HB |
685 | return EMULATE_DO_MMIO; |
686 | } | |
687 | ||
688 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
689 | { | |
690 | int r; | |
691 | sigset_t sigsaved; | |
692 | ||
693 | if (vcpu->sigset_active) | |
694 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
695 | ||
696 | if (vcpu->mmio_needed) { | |
697 | if (!vcpu->mmio_is_write) | |
698 | kvmppc_complete_mmio_load(vcpu, run); | |
699 | vcpu->mmio_needed = 0; | |
700 | } else if (vcpu->arch.dcr_needed) { | |
701 | if (!vcpu->arch.dcr_is_write) | |
702 | kvmppc_complete_dcr_load(vcpu, run); | |
703 | vcpu->arch.dcr_needed = 0; | |
ad0a048b AG |
704 | } else if (vcpu->arch.osi_needed) { |
705 | u64 *gprs = run->osi.gprs; | |
706 | int i; | |
707 | ||
708 | for (i = 0; i < 32; i++) | |
709 | kvmppc_set_gpr(vcpu, i, gprs[i]); | |
710 | vcpu->arch.osi_needed = 0; | |
de56a948 PM |
711 | } else if (vcpu->arch.hcall_needed) { |
712 | int i; | |
713 | ||
714 | kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret); | |
715 | for (i = 0; i < 9; ++i) | |
716 | kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]); | |
717 | vcpu->arch.hcall_needed = 0; | |
1c810636 AG |
718 | #ifdef CONFIG_BOOKE |
719 | } else if (vcpu->arch.epr_needed) { | |
720 | kvmppc_set_epr(vcpu, run->epr.epr); | |
721 | vcpu->arch.epr_needed = 0; | |
722 | #endif | |
bbf45ba5 HB |
723 | } |
724 | ||
df6909e5 | 725 | r = kvmppc_vcpu_run(run, vcpu); |
bbf45ba5 HB |
726 | |
727 | if (vcpu->sigset_active) | |
728 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
729 | ||
730 | return r; | |
731 | } | |
732 | ||
733 | int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) | |
734 | { | |
19ccb76a | 735 | if (irq->irq == KVM_INTERRUPT_UNSET) { |
4fe27d2a | 736 | kvmppc_core_dequeue_external(vcpu); |
19ccb76a PM |
737 | return 0; |
738 | } | |
739 | ||
740 | kvmppc_core_queue_external(vcpu, irq); | |
b6d33834 | 741 | |
dfd4d47e | 742 | kvm_vcpu_kick(vcpu); |
45c5eb67 | 743 | |
bbf45ba5 HB |
744 | return 0; |
745 | } | |
746 | ||
71fbfd5f AG |
747 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
748 | struct kvm_enable_cap *cap) | |
749 | { | |
750 | int r; | |
751 | ||
752 | if (cap->flags) | |
753 | return -EINVAL; | |
754 | ||
755 | switch (cap->cap) { | |
ad0a048b AG |
756 | case KVM_CAP_PPC_OSI: |
757 | r = 0; | |
758 | vcpu->arch.osi_enabled = true; | |
759 | break; | |
930b412a AG |
760 | case KVM_CAP_PPC_PAPR: |
761 | r = 0; | |
762 | vcpu->arch.papr_enabled = true; | |
763 | break; | |
1c810636 AG |
764 | case KVM_CAP_PPC_EPR: |
765 | r = 0; | |
5df554ad SW |
766 | if (cap->args[0]) |
767 | vcpu->arch.epr_flags |= KVMPPC_EPR_USER; | |
768 | else | |
769 | vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER; | |
1c810636 | 770 | break; |
f61c94bb BB |
771 | #ifdef CONFIG_BOOKE |
772 | case KVM_CAP_PPC_BOOKE_WATCHDOG: | |
773 | r = 0; | |
774 | vcpu->arch.watchdog_enabled = true; | |
775 | break; | |
776 | #endif | |
bf7ca4bd | 777 | #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) |
dc83b8bc SW |
778 | case KVM_CAP_SW_TLB: { |
779 | struct kvm_config_tlb cfg; | |
780 | void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0]; | |
781 | ||
782 | r = -EFAULT; | |
783 | if (copy_from_user(&cfg, user_ptr, sizeof(cfg))) | |
784 | break; | |
785 | ||
786 | r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg); | |
787 | break; | |
788 | } | |
789 | #endif | |
71fbfd5f AG |
790 | default: |
791 | r = -EINVAL; | |
792 | break; | |
793 | } | |
794 | ||
af8f38b3 AG |
795 | if (!r) |
796 | r = kvmppc_sanity_check(vcpu); | |
797 | ||
71fbfd5f AG |
798 | return r; |
799 | } | |
800 | ||
bbf45ba5 HB |
801 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
802 | struct kvm_mp_state *mp_state) | |
803 | { | |
804 | return -EINVAL; | |
805 | } | |
806 | ||
807 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
808 | struct kvm_mp_state *mp_state) | |
809 | { | |
810 | return -EINVAL; | |
811 | } | |
812 | ||
813 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
814 | unsigned int ioctl, unsigned long arg) | |
815 | { | |
816 | struct kvm_vcpu *vcpu = filp->private_data; | |
817 | void __user *argp = (void __user *)arg; | |
818 | long r; | |
819 | ||
93736624 AK |
820 | switch (ioctl) { |
821 | case KVM_INTERRUPT: { | |
bbf45ba5 HB |
822 | struct kvm_interrupt irq; |
823 | r = -EFAULT; | |
824 | if (copy_from_user(&irq, argp, sizeof(irq))) | |
93736624 | 825 | goto out; |
bbf45ba5 | 826 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
93736624 | 827 | goto out; |
bbf45ba5 | 828 | } |
19483d14 | 829 | |
71fbfd5f AG |
830 | case KVM_ENABLE_CAP: |
831 | { | |
832 | struct kvm_enable_cap cap; | |
833 | r = -EFAULT; | |
834 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
835 | goto out; | |
836 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
837 | break; | |
838 | } | |
dc83b8bc | 839 | |
e24ed81f AG |
840 | case KVM_SET_ONE_REG: |
841 | case KVM_GET_ONE_REG: | |
842 | { | |
843 | struct kvm_one_reg reg; | |
844 | r = -EFAULT; | |
845 | if (copy_from_user(®, argp, sizeof(reg))) | |
846 | goto out; | |
847 | if (ioctl == KVM_SET_ONE_REG) | |
848 | r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®); | |
849 | else | |
850 | r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®); | |
851 | break; | |
852 | } | |
853 | ||
bf7ca4bd | 854 | #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) |
dc83b8bc SW |
855 | case KVM_DIRTY_TLB: { |
856 | struct kvm_dirty_tlb dirty; | |
857 | r = -EFAULT; | |
858 | if (copy_from_user(&dirty, argp, sizeof(dirty))) | |
859 | goto out; | |
860 | r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty); | |
861 | break; | |
862 | } | |
863 | #endif | |
bbf45ba5 HB |
864 | default: |
865 | r = -EINVAL; | |
866 | } | |
867 | ||
868 | out: | |
869 | return r; | |
870 | } | |
871 | ||
5b1c1493 CO |
872 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
873 | { | |
874 | return VM_FAULT_SIGBUS; | |
875 | } | |
876 | ||
15711e9c AG |
877 | static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) |
878 | { | |
784bafac SY |
879 | u32 inst_nop = 0x60000000; |
880 | #ifdef CONFIG_KVM_BOOKE_HV | |
881 | u32 inst_sc1 = 0x44000022; | |
882 | pvinfo->hcall[0] = inst_sc1; | |
883 | pvinfo->hcall[1] = inst_nop; | |
884 | pvinfo->hcall[2] = inst_nop; | |
885 | pvinfo->hcall[3] = inst_nop; | |
886 | #else | |
15711e9c AG |
887 | u32 inst_lis = 0x3c000000; |
888 | u32 inst_ori = 0x60000000; | |
15711e9c AG |
889 | u32 inst_sc = 0x44000002; |
890 | u32 inst_imm_mask = 0xffff; | |
891 | ||
892 | /* | |
893 | * The hypercall to get into KVM from within guest context is as | |
894 | * follows: | |
895 | * | |
896 | * lis r0, r0, KVM_SC_MAGIC_R0@h | |
897 | * ori r0, KVM_SC_MAGIC_R0@l | |
898 | * sc | |
899 | * nop | |
900 | */ | |
901 | pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask); | |
902 | pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask); | |
903 | pvinfo->hcall[2] = inst_sc; | |
904 | pvinfo->hcall[3] = inst_nop; | |
784bafac | 905 | #endif |
15711e9c | 906 | |
9202e076 LYB |
907 | pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE; |
908 | ||
15711e9c AG |
909 | return 0; |
910 | } | |
911 | ||
bbf45ba5 HB |
912 | long kvm_arch_vm_ioctl(struct file *filp, |
913 | unsigned int ioctl, unsigned long arg) | |
914 | { | |
5df554ad | 915 | struct kvm *kvm __maybe_unused = filp->private_data; |
15711e9c | 916 | void __user *argp = (void __user *)arg; |
bbf45ba5 HB |
917 | long r; |
918 | ||
919 | switch (ioctl) { | |
15711e9c AG |
920 | case KVM_PPC_GET_PVINFO: { |
921 | struct kvm_ppc_pvinfo pvinfo; | |
d8cdddcd | 922 | memset(&pvinfo, 0, sizeof(pvinfo)); |
15711e9c AG |
923 | r = kvm_vm_ioctl_get_pvinfo(&pvinfo); |
924 | if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) { | |
925 | r = -EFAULT; | |
926 | goto out; | |
927 | } | |
928 | ||
929 | break; | |
930 | } | |
f31e65e1 | 931 | #ifdef CONFIG_PPC_BOOK3S_64 |
54738c09 DG |
932 | case KVM_CREATE_SPAPR_TCE: { |
933 | struct kvm_create_spapr_tce create_tce; | |
54738c09 DG |
934 | |
935 | r = -EFAULT; | |
936 | if (copy_from_user(&create_tce, argp, sizeof(create_tce))) | |
937 | goto out; | |
938 | r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce); | |
939 | goto out; | |
940 | } | |
f31e65e1 | 941 | #endif /* CONFIG_PPC_BOOK3S_64 */ |
aa04b4cc | 942 | |
f31e65e1 | 943 | #ifdef CONFIG_KVM_BOOK3S_64_HV |
aa04b4cc | 944 | case KVM_ALLOCATE_RMA: { |
aa04b4cc PM |
945 | struct kvm_allocate_rma rma; |
946 | ||
947 | r = kvm_vm_ioctl_allocate_rma(kvm, &rma); | |
948 | if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma))) | |
949 | r = -EFAULT; | |
950 | break; | |
951 | } | |
32fad281 PM |
952 | |
953 | case KVM_PPC_ALLOCATE_HTAB: { | |
32fad281 PM |
954 | u32 htab_order; |
955 | ||
956 | r = -EFAULT; | |
957 | if (get_user(htab_order, (u32 __user *)argp)) | |
958 | break; | |
959 | r = kvmppc_alloc_reset_hpt(kvm, &htab_order); | |
960 | if (r) | |
961 | break; | |
962 | r = -EFAULT; | |
963 | if (put_user(htab_order, (u32 __user *)argp)) | |
964 | break; | |
965 | r = 0; | |
966 | break; | |
967 | } | |
a2932923 PM |
968 | |
969 | case KVM_PPC_GET_HTAB_FD: { | |
a2932923 PM |
970 | struct kvm_get_htab_fd ghf; |
971 | ||
972 | r = -EFAULT; | |
973 | if (copy_from_user(&ghf, argp, sizeof(ghf))) | |
974 | break; | |
975 | r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); | |
976 | break; | |
977 | } | |
54738c09 DG |
978 | #endif /* CONFIG_KVM_BOOK3S_64_HV */ |
979 | ||
5b74716e BH |
980 | #ifdef CONFIG_PPC_BOOK3S_64 |
981 | case KVM_PPC_GET_SMMU_INFO: { | |
5b74716e BH |
982 | struct kvm_ppc_smmu_info info; |
983 | ||
984 | memset(&info, 0, sizeof(info)); | |
985 | r = kvm_vm_ioctl_get_smmu_info(kvm, &info); | |
986 | if (r >= 0 && copy_to_user(argp, &info, sizeof(info))) | |
987 | r = -EFAULT; | |
988 | break; | |
989 | } | |
990 | #endif /* CONFIG_PPC_BOOK3S_64 */ | |
bbf45ba5 | 991 | default: |
367e1319 | 992 | r = -ENOTTY; |
bbf45ba5 HB |
993 | } |
994 | ||
15711e9c | 995 | out: |
bbf45ba5 HB |
996 | return r; |
997 | } | |
998 | ||
043cc4d7 SW |
999 | static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)]; |
1000 | static unsigned long nr_lpids; | |
1001 | ||
1002 | long kvmppc_alloc_lpid(void) | |
1003 | { | |
1004 | long lpid; | |
1005 | ||
1006 | do { | |
1007 | lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS); | |
1008 | if (lpid >= nr_lpids) { | |
1009 | pr_err("%s: No LPIDs free\n", __func__); | |
1010 | return -ENOMEM; | |
1011 | } | |
1012 | } while (test_and_set_bit(lpid, lpid_inuse)); | |
1013 | ||
1014 | return lpid; | |
1015 | } | |
1016 | ||
1017 | void kvmppc_claim_lpid(long lpid) | |
1018 | { | |
1019 | set_bit(lpid, lpid_inuse); | |
1020 | } | |
1021 | ||
1022 | void kvmppc_free_lpid(long lpid) | |
1023 | { | |
1024 | clear_bit(lpid, lpid_inuse); | |
1025 | } | |
1026 | ||
1027 | void kvmppc_init_lpid(unsigned long nr_lpids_param) | |
1028 | { | |
1029 | nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param); | |
1030 | memset(lpid_inuse, 0, sizeof(lpid_inuse)); | |
1031 | } | |
1032 | ||
bbf45ba5 HB |
1033 | int kvm_arch_init(void *opaque) |
1034 | { | |
1035 | return 0; | |
1036 | } | |
1037 | ||
1038 | void kvm_arch_exit(void) | |
1039 | { | |
1040 | } |