Commit | Line | Data |
---|---|---|
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> | |
24 | #include <linux/module.h> | |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/fs.h> | |
27 | #include <asm/cputable.h> | |
28 | #include <asm/uaccess.h> | |
29 | #include <asm/kvm_ppc.h> | |
83aae4a8 | 30 | #include <asm/tlbflush.h> |
bbf45ba5 HB |
31 | |
32 | ||
33 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) | |
34 | { | |
35 | return gfn; | |
36 | } | |
37 | ||
38 | int kvm_cpu_has_interrupt(struct kvm_vcpu *v) | |
39 | { | |
45c5eb67 | 40 | return !!(v->arch.pending_exceptions); |
bbf45ba5 HB |
41 | } |
42 | ||
43 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) | |
44 | { | |
45c5eb67 | 45 | return !(v->arch.msr & MSR_WE); |
bbf45ba5 HB |
46 | } |
47 | ||
48 | ||
49 | int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) | |
50 | { | |
51 | enum emulation_result er; | |
52 | int r; | |
53 | ||
54 | er = kvmppc_emulate_instruction(run, vcpu); | |
55 | switch (er) { | |
56 | case EMULATE_DONE: | |
57 | /* Future optimization: only reload non-volatiles if they were | |
58 | * actually modified. */ | |
59 | r = RESUME_GUEST_NV; | |
60 | break; | |
61 | case EMULATE_DO_MMIO: | |
62 | run->exit_reason = KVM_EXIT_MMIO; | |
63 | /* We must reload nonvolatiles because "update" load/store | |
64 | * instructions modify register state. */ | |
65 | /* Future optimization: only reload non-volatiles if they were | |
66 | * actually modified. */ | |
67 | r = RESUME_HOST_NV; | |
68 | break; | |
69 | case EMULATE_FAIL: | |
70 | /* XXX Deliver Program interrupt to guest. */ | |
71 | printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__, | |
72 | vcpu->arch.last_inst); | |
73 | r = RESUME_HOST; | |
74 | break; | |
75 | default: | |
76 | BUG(); | |
77 | } | |
78 | ||
79 | return r; | |
80 | } | |
81 | ||
82 | void kvm_arch_hardware_enable(void *garbage) | |
83 | { | |
84 | } | |
85 | ||
86 | void kvm_arch_hardware_disable(void *garbage) | |
87 | { | |
88 | } | |
89 | ||
90 | int kvm_arch_hardware_setup(void) | |
91 | { | |
92 | return 0; | |
93 | } | |
94 | ||
95 | void kvm_arch_hardware_unsetup(void) | |
96 | { | |
97 | } | |
98 | ||
99 | void kvm_arch_check_processor_compat(void *rtn) | |
100 | { | |
101 | int r; | |
102 | ||
103 | if (strcmp(cur_cpu_spec->platform, "ppc440") == 0) | |
104 | r = 0; | |
105 | else | |
106 | r = -ENOTSUPP; | |
107 | ||
108 | *(int *)rtn = r; | |
109 | } | |
110 | ||
111 | struct kvm *kvm_arch_create_vm(void) | |
112 | { | |
113 | struct kvm *kvm; | |
114 | ||
115 | kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
116 | if (!kvm) | |
117 | return ERR_PTR(-ENOMEM); | |
118 | ||
119 | return kvm; | |
120 | } | |
121 | ||
122 | static void kvmppc_free_vcpus(struct kvm *kvm) | |
123 | { | |
124 | unsigned int i; | |
125 | ||
126 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
127 | if (kvm->vcpus[i]) { | |
128 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
129 | kvm->vcpus[i] = NULL; | |
130 | } | |
131 | } | |
132 | } | |
133 | ||
134 | void kvm_arch_destroy_vm(struct kvm *kvm) | |
135 | { | |
136 | kvmppc_free_vcpus(kvm); | |
137 | kvm_free_physmem(kvm); | |
138 | kfree(kvm); | |
139 | } | |
140 | ||
141 | int kvm_dev_ioctl_check_extension(long ext) | |
142 | { | |
143 | int r; | |
144 | ||
145 | switch (ext) { | |
146 | case KVM_CAP_USER_MEMORY: | |
147 | r = 1; | |
148 | break; | |
588968b6 LV |
149 | case KVM_CAP_COALESCED_MMIO: |
150 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
151 | break; | |
bbf45ba5 HB |
152 | default: |
153 | r = 0; | |
154 | break; | |
155 | } | |
156 | return r; | |
157 | ||
158 | } | |
159 | ||
160 | long kvm_arch_dev_ioctl(struct file *filp, | |
161 | unsigned int ioctl, unsigned long arg) | |
162 | { | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
166 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
167 | struct kvm_userspace_memory_region *mem, | |
168 | struct kvm_memory_slot old, | |
169 | int user_alloc) | |
170 | { | |
171 | return 0; | |
172 | } | |
173 | ||
34d4cb8f MT |
174 | void kvm_arch_flush_shadow(struct kvm *kvm) |
175 | { | |
176 | } | |
177 | ||
bbf45ba5 HB |
178 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) |
179 | { | |
180 | struct kvm_vcpu *vcpu; | |
181 | int err; | |
182 | ||
183 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); | |
184 | if (!vcpu) { | |
185 | err = -ENOMEM; | |
186 | goto out; | |
187 | } | |
188 | ||
189 | err = kvm_vcpu_init(vcpu, kvm, id); | |
190 | if (err) | |
191 | goto free_vcpu; | |
192 | ||
193 | return vcpu; | |
194 | ||
195 | free_vcpu: | |
196 | kmem_cache_free(kvm_vcpu_cache, vcpu); | |
197 | out: | |
198 | return ERR_PTR(err); | |
199 | } | |
200 | ||
201 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
202 | { | |
203 | kvm_vcpu_uninit(vcpu); | |
204 | kmem_cache_free(kvm_vcpu_cache, vcpu); | |
205 | } | |
206 | ||
207 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
208 | { | |
209 | kvm_arch_vcpu_free(vcpu); | |
210 | } | |
211 | ||
212 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
213 | { | |
214 | unsigned int priority = exception_priority[BOOKE_INTERRUPT_DECREMENTER]; | |
215 | ||
216 | return test_bit(priority, &vcpu->arch.pending_exceptions); | |
217 | } | |
218 | ||
219 | static void kvmppc_decrementer_func(unsigned long data) | |
220 | { | |
221 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; | |
222 | ||
223 | kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_DECREMENTER); | |
45c5eb67 HB |
224 | |
225 | if (waitqueue_active(&vcpu->wq)) { | |
226 | wake_up_interruptible(&vcpu->wq); | |
227 | vcpu->stat.halt_wakeup++; | |
228 | } | |
bbf45ba5 HB |
229 | } |
230 | ||
231 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
232 | { | |
233 | setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func, | |
234 | (unsigned long)vcpu); | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
240 | { | |
c30f8a6c | 241 | kvmppc_core_destroy_mmu(vcpu); |
bbf45ba5 HB |
242 | } |
243 | ||
6a0ab738 HB |
244 | /* Note: clearing MSR[DE] just means that the debug interrupt will not be |
245 | * delivered *immediately*. Instead, it simply sets the appropriate DBSR bits. | |
246 | * If those DBSR bits are still set when MSR[DE] is re-enabled, the interrupt | |
247 | * will be delivered as an "imprecise debug event" (which is indicated by | |
248 | * DBSR[IDE]. | |
249 | */ | |
250 | static void kvmppc_disable_debug_interrupts(void) | |
251 | { | |
252 | mtmsr(mfmsr() & ~MSR_DE); | |
253 | } | |
254 | ||
255 | static void kvmppc_restore_host_debug_state(struct kvm_vcpu *vcpu) | |
256 | { | |
257 | kvmppc_disable_debug_interrupts(); | |
258 | ||
259 | mtspr(SPRN_IAC1, vcpu->arch.host_iac[0]); | |
260 | mtspr(SPRN_IAC2, vcpu->arch.host_iac[1]); | |
261 | mtspr(SPRN_IAC3, vcpu->arch.host_iac[2]); | |
262 | mtspr(SPRN_IAC4, vcpu->arch.host_iac[3]); | |
263 | mtspr(SPRN_DBCR1, vcpu->arch.host_dbcr1); | |
264 | mtspr(SPRN_DBCR2, vcpu->arch.host_dbcr2); | |
265 | mtspr(SPRN_DBCR0, vcpu->arch.host_dbcr0); | |
266 | mtmsr(vcpu->arch.host_msr); | |
267 | } | |
268 | ||
269 | static void kvmppc_load_guest_debug_registers(struct kvm_vcpu *vcpu) | |
270 | { | |
271 | struct kvm_guest_debug *dbg = &vcpu->guest_debug; | |
272 | u32 dbcr0 = 0; | |
273 | ||
274 | vcpu->arch.host_msr = mfmsr(); | |
275 | kvmppc_disable_debug_interrupts(); | |
276 | ||
277 | /* Save host debug register state. */ | |
278 | vcpu->arch.host_iac[0] = mfspr(SPRN_IAC1); | |
279 | vcpu->arch.host_iac[1] = mfspr(SPRN_IAC2); | |
280 | vcpu->arch.host_iac[2] = mfspr(SPRN_IAC3); | |
281 | vcpu->arch.host_iac[3] = mfspr(SPRN_IAC4); | |
282 | vcpu->arch.host_dbcr0 = mfspr(SPRN_DBCR0); | |
283 | vcpu->arch.host_dbcr1 = mfspr(SPRN_DBCR1); | |
284 | vcpu->arch.host_dbcr2 = mfspr(SPRN_DBCR2); | |
285 | ||
286 | /* set registers up for guest */ | |
287 | ||
288 | if (dbg->bp[0]) { | |
289 | mtspr(SPRN_IAC1, dbg->bp[0]); | |
290 | dbcr0 |= DBCR0_IAC1 | DBCR0_IDM; | |
291 | } | |
292 | if (dbg->bp[1]) { | |
293 | mtspr(SPRN_IAC2, dbg->bp[1]); | |
294 | dbcr0 |= DBCR0_IAC2 | DBCR0_IDM; | |
295 | } | |
296 | if (dbg->bp[2]) { | |
297 | mtspr(SPRN_IAC3, dbg->bp[2]); | |
298 | dbcr0 |= DBCR0_IAC3 | DBCR0_IDM; | |
299 | } | |
300 | if (dbg->bp[3]) { | |
301 | mtspr(SPRN_IAC4, dbg->bp[3]); | |
302 | dbcr0 |= DBCR0_IAC4 | DBCR0_IDM; | |
303 | } | |
304 | ||
305 | mtspr(SPRN_DBCR0, dbcr0); | |
306 | mtspr(SPRN_DBCR1, 0); | |
307 | mtspr(SPRN_DBCR2, 0); | |
308 | } | |
309 | ||
bbf45ba5 HB |
310 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
311 | { | |
83aae4a8 HB |
312 | int i; |
313 | ||
6a0ab738 HB |
314 | if (vcpu->guest_debug.enabled) |
315 | kvmppc_load_guest_debug_registers(vcpu); | |
83aae4a8 HB |
316 | |
317 | /* Mark every guest entry in the shadow TLB entry modified, so that they | |
318 | * will all be reloaded on the next vcpu run (instead of being | |
319 | * demand-faulted). */ | |
320 | for (i = 0; i <= tlb_44x_hwater; i++) | |
321 | kvmppc_tlbe_set_modified(vcpu, i); | |
bbf45ba5 HB |
322 | } |
323 | ||
324 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
325 | { | |
6a0ab738 HB |
326 | if (vcpu->guest_debug.enabled) |
327 | kvmppc_restore_host_debug_state(vcpu); | |
83aae4a8 HB |
328 | |
329 | /* Don't leave guest TLB entries resident when being de-scheduled. */ | |
330 | /* XXX It would be nice to differentiate between heavyweight exit and | |
331 | * sched_out here, since we could avoid the TLB flush for heavyweight | |
332 | * exits. */ | |
2a4aca11 | 333 | _tlbil_all(); |
bbf45ba5 HB |
334 | } |
335 | ||
bbf45ba5 HB |
336 | int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
337 | struct kvm_debug_guest *dbg) | |
338 | { | |
6a0ab738 HB |
339 | int i; |
340 | ||
341 | vcpu->guest_debug.enabled = dbg->enabled; | |
342 | if (vcpu->guest_debug.enabled) { | |
343 | for (i=0; i < ARRAY_SIZE(vcpu->guest_debug.bp); i++) { | |
344 | if (dbg->breakpoints[i].enabled) | |
345 | vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address; | |
346 | else | |
347 | vcpu->guest_debug.bp[i] = 0; | |
348 | } | |
349 | } | |
350 | ||
351 | return 0; | |
bbf45ba5 HB |
352 | } |
353 | ||
354 | static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu, | |
355 | struct kvm_run *run) | |
356 | { | |
357 | u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr]; | |
358 | *gpr = run->dcr.data; | |
359 | } | |
360 | ||
361 | static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, | |
362 | struct kvm_run *run) | |
363 | { | |
364 | u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr]; | |
365 | ||
366 | if (run->mmio.len > sizeof(*gpr)) { | |
367 | printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len); | |
368 | return; | |
369 | } | |
370 | ||
371 | if (vcpu->arch.mmio_is_bigendian) { | |
372 | switch (run->mmio.len) { | |
373 | case 4: *gpr = *(u32 *)run->mmio.data; break; | |
374 | case 2: *gpr = *(u16 *)run->mmio.data; break; | |
375 | case 1: *gpr = *(u8 *)run->mmio.data; break; | |
376 | } | |
377 | } else { | |
378 | /* Convert BE data from userland back to LE. */ | |
379 | switch (run->mmio.len) { | |
380 | case 4: *gpr = ld_le32((u32 *)run->mmio.data); break; | |
381 | case 2: *gpr = ld_le16((u16 *)run->mmio.data); break; | |
382 | case 1: *gpr = *(u8 *)run->mmio.data; break; | |
383 | } | |
384 | } | |
385 | } | |
386 | ||
387 | int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
388 | unsigned int rt, unsigned int bytes, int is_bigendian) | |
389 | { | |
390 | if (bytes > sizeof(run->mmio.data)) { | |
391 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
392 | run->mmio.len); | |
393 | } | |
394 | ||
395 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
396 | run->mmio.len = bytes; | |
397 | run->mmio.is_write = 0; | |
398 | ||
399 | vcpu->arch.io_gpr = rt; | |
400 | vcpu->arch.mmio_is_bigendian = is_bigendian; | |
401 | vcpu->mmio_needed = 1; | |
402 | vcpu->mmio_is_write = 0; | |
403 | ||
404 | return EMULATE_DO_MMIO; | |
405 | } | |
406 | ||
407 | int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
408 | u32 val, unsigned int bytes, int is_bigendian) | |
409 | { | |
410 | void *data = run->mmio.data; | |
411 | ||
412 | if (bytes > sizeof(run->mmio.data)) { | |
413 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
414 | run->mmio.len); | |
415 | } | |
416 | ||
417 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
418 | run->mmio.len = bytes; | |
419 | run->mmio.is_write = 1; | |
420 | vcpu->mmio_needed = 1; | |
421 | vcpu->mmio_is_write = 1; | |
422 | ||
423 | /* Store the value at the lowest bytes in 'data'. */ | |
424 | if (is_bigendian) { | |
425 | switch (bytes) { | |
426 | case 4: *(u32 *)data = val; break; | |
427 | case 2: *(u16 *)data = val; break; | |
428 | case 1: *(u8 *)data = val; break; | |
429 | } | |
430 | } else { | |
431 | /* Store LE value into 'data'. */ | |
432 | switch (bytes) { | |
433 | case 4: st_le32(data, val); break; | |
434 | case 2: st_le16(data, val); break; | |
435 | case 1: *(u8 *)data = val; break; | |
436 | } | |
437 | } | |
438 | ||
439 | return EMULATE_DO_MMIO; | |
440 | } | |
441 | ||
442 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
443 | { | |
444 | int r; | |
445 | sigset_t sigsaved; | |
446 | ||
45c5eb67 HB |
447 | vcpu_load(vcpu); |
448 | ||
bbf45ba5 HB |
449 | if (vcpu->sigset_active) |
450 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
451 | ||
452 | if (vcpu->mmio_needed) { | |
453 | if (!vcpu->mmio_is_write) | |
454 | kvmppc_complete_mmio_load(vcpu, run); | |
455 | vcpu->mmio_needed = 0; | |
456 | } else if (vcpu->arch.dcr_needed) { | |
457 | if (!vcpu->arch.dcr_is_write) | |
458 | kvmppc_complete_dcr_load(vcpu, run); | |
459 | vcpu->arch.dcr_needed = 0; | |
460 | } | |
461 | ||
462 | kvmppc_check_and_deliver_interrupts(vcpu); | |
463 | ||
464 | local_irq_disable(); | |
465 | kvm_guest_enter(); | |
466 | r = __kvmppc_vcpu_run(run, vcpu); | |
467 | kvm_guest_exit(); | |
468 | local_irq_enable(); | |
469 | ||
470 | if (vcpu->sigset_active) | |
471 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
472 | ||
45c5eb67 HB |
473 | vcpu_put(vcpu); |
474 | ||
bbf45ba5 HB |
475 | return r; |
476 | } | |
477 | ||
478 | int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) | |
479 | { | |
480 | kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_EXTERNAL); | |
45c5eb67 HB |
481 | |
482 | if (waitqueue_active(&vcpu->wq)) { | |
483 | wake_up_interruptible(&vcpu->wq); | |
484 | vcpu->stat.halt_wakeup++; | |
485 | } | |
486 | ||
bbf45ba5 HB |
487 | return 0; |
488 | } | |
489 | ||
490 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, | |
491 | struct kvm_mp_state *mp_state) | |
492 | { | |
493 | return -EINVAL; | |
494 | } | |
495 | ||
496 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
497 | struct kvm_mp_state *mp_state) | |
498 | { | |
499 | return -EINVAL; | |
500 | } | |
501 | ||
502 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
503 | unsigned int ioctl, unsigned long arg) | |
504 | { | |
505 | struct kvm_vcpu *vcpu = filp->private_data; | |
506 | void __user *argp = (void __user *)arg; | |
507 | long r; | |
508 | ||
509 | switch (ioctl) { | |
510 | case KVM_INTERRUPT: { | |
511 | struct kvm_interrupt irq; | |
512 | r = -EFAULT; | |
513 | if (copy_from_user(&irq, argp, sizeof(irq))) | |
514 | goto out; | |
515 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
516 | break; | |
517 | } | |
518 | default: | |
519 | r = -EINVAL; | |
520 | } | |
521 | ||
522 | out: | |
523 | return r; | |
524 | } | |
525 | ||
526 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) | |
527 | { | |
528 | return -ENOTSUPP; | |
529 | } | |
530 | ||
531 | long kvm_arch_vm_ioctl(struct file *filp, | |
532 | unsigned int ioctl, unsigned long arg) | |
533 | { | |
534 | long r; | |
535 | ||
536 | switch (ioctl) { | |
537 | default: | |
538 | r = -EINVAL; | |
539 | } | |
540 | ||
541 | return r; | |
542 | } | |
543 | ||
544 | int kvm_arch_init(void *opaque) | |
545 | { | |
546 | return 0; | |
547 | } | |
548 | ||
549 | void kvm_arch_exit(void) | |
550 | { | |
551 | } |