Commit | Line | Data |
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669e846e SL |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * KVM/MIPS: MIPS specific KVM APIs | |
7 | * | |
8 | * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. | |
9 | * Authors: Sanjay Lal <sanjayl@kymasys.com> | |
d116e812 | 10 | */ |
669e846e SL |
11 | |
12 | #include <linux/errno.h> | |
13 | #include <linux/err.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/vmalloc.h> | |
16 | #include <linux/fs.h> | |
17 | #include <linux/bootmem.h> | |
18 | #include <asm/page.h> | |
19 | #include <asm/cacheflush.h> | |
20 | #include <asm/mmu_context.h> | |
21 | ||
22 | #include <linux/kvm_host.h> | |
23 | ||
d7d5b05f DCZ |
24 | #include "interrupt.h" |
25 | #include "commpage.h" | |
669e846e SL |
26 | |
27 | #define CREATE_TRACE_POINTS | |
28 | #include "trace.h" | |
29 | ||
30 | #ifndef VECTORSPACING | |
31 | #define VECTORSPACING 0x100 /* for EI/VI mode */ | |
32 | #endif | |
33 | ||
d116e812 | 34 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x) |
669e846e | 35 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
d116e812 DCZ |
36 | { "wait", VCPU_STAT(wait_exits), KVM_STAT_VCPU }, |
37 | { "cache", VCPU_STAT(cache_exits), KVM_STAT_VCPU }, | |
38 | { "signal", VCPU_STAT(signal_exits), KVM_STAT_VCPU }, | |
39 | { "interrupt", VCPU_STAT(int_exits), KVM_STAT_VCPU }, | |
40 | { "cop_unsuable", VCPU_STAT(cop_unusable_exits), KVM_STAT_VCPU }, | |
41 | { "tlbmod", VCPU_STAT(tlbmod_exits), KVM_STAT_VCPU }, | |
42 | { "tlbmiss_ld", VCPU_STAT(tlbmiss_ld_exits), KVM_STAT_VCPU }, | |
43 | { "tlbmiss_st", VCPU_STAT(tlbmiss_st_exits), KVM_STAT_VCPU }, | |
44 | { "addrerr_st", VCPU_STAT(addrerr_st_exits), KVM_STAT_VCPU }, | |
45 | { "addrerr_ld", VCPU_STAT(addrerr_ld_exits), KVM_STAT_VCPU }, | |
46 | { "syscall", VCPU_STAT(syscall_exits), KVM_STAT_VCPU }, | |
47 | { "resvd_inst", VCPU_STAT(resvd_inst_exits), KVM_STAT_VCPU }, | |
48 | { "break_inst", VCPU_STAT(break_inst_exits), KVM_STAT_VCPU }, | |
49 | { "flush_dcache", VCPU_STAT(flush_dcache_exits), KVM_STAT_VCPU }, | |
50 | { "halt_wakeup", VCPU_STAT(halt_wakeup), KVM_STAT_VCPU }, | |
669e846e SL |
51 | {NULL} |
52 | }; | |
53 | ||
54 | static int kvm_mips_reset_vcpu(struct kvm_vcpu *vcpu) | |
55 | { | |
56 | int i; | |
d116e812 | 57 | |
669e846e SL |
58 | for_each_possible_cpu(i) { |
59 | vcpu->arch.guest_kernel_asid[i] = 0; | |
60 | vcpu->arch.guest_user_asid[i] = 0; | |
61 | } | |
d116e812 | 62 | |
669e846e SL |
63 | return 0; |
64 | } | |
65 | ||
d116e812 DCZ |
66 | /* |
67 | * XXXKYMA: We are simulatoring a processor that has the WII bit set in | |
68 | * Config7, so we are "runnable" if interrupts are pending | |
669e846e SL |
69 | */ |
70 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) | |
71 | { | |
72 | return !!(vcpu->arch.pending_exceptions); | |
73 | } | |
74 | ||
75 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) | |
76 | { | |
77 | return 1; | |
78 | } | |
79 | ||
13a34e06 | 80 | int kvm_arch_hardware_enable(void) |
669e846e SL |
81 | { |
82 | return 0; | |
83 | } | |
84 | ||
669e846e SL |
85 | int kvm_arch_hardware_setup(void) |
86 | { | |
87 | return 0; | |
88 | } | |
89 | ||
669e846e SL |
90 | void kvm_arch_check_processor_compat(void *rtn) |
91 | { | |
d98403a5 | 92 | *(int *)rtn = 0; |
669e846e SL |
93 | } |
94 | ||
95 | static void kvm_mips_init_tlbs(struct kvm *kvm) | |
96 | { | |
97 | unsigned long wired; | |
98 | ||
d116e812 DCZ |
99 | /* |
100 | * Add a wired entry to the TLB, it is used to map the commpage to | |
101 | * the Guest kernel | |
102 | */ | |
669e846e SL |
103 | wired = read_c0_wired(); |
104 | write_c0_wired(wired + 1); | |
105 | mtc0_tlbw_hazard(); | |
106 | kvm->arch.commpage_tlb = wired; | |
107 | ||
108 | kvm_debug("[%d] commpage TLB: %d\n", smp_processor_id(), | |
109 | kvm->arch.commpage_tlb); | |
110 | } | |
111 | ||
112 | static void kvm_mips_init_vm_percpu(void *arg) | |
113 | { | |
114 | struct kvm *kvm = (struct kvm *)arg; | |
115 | ||
116 | kvm_mips_init_tlbs(kvm); | |
117 | kvm_mips_callbacks->vm_init(kvm); | |
118 | ||
119 | } | |
120 | ||
121 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) | |
122 | { | |
123 | if (atomic_inc_return(&kvm_mips_instance) == 1) { | |
6e95bfd2 JH |
124 | kvm_debug("%s: 1st KVM instance, setup host TLB parameters\n", |
125 | __func__); | |
669e846e SL |
126 | on_each_cpu(kvm_mips_init_vm_percpu, kvm, 1); |
127 | } | |
128 | ||
669e846e SL |
129 | return 0; |
130 | } | |
131 | ||
132 | void kvm_mips_free_vcpus(struct kvm *kvm) | |
133 | { | |
134 | unsigned int i; | |
135 | struct kvm_vcpu *vcpu; | |
136 | ||
137 | /* Put the pages we reserved for the guest pmap */ | |
138 | for (i = 0; i < kvm->arch.guest_pmap_npages; i++) { | |
139 | if (kvm->arch.guest_pmap[i] != KVM_INVALID_PAGE) | |
140 | kvm_mips_release_pfn_clean(kvm->arch.guest_pmap[i]); | |
141 | } | |
c6c0a663 | 142 | kfree(kvm->arch.guest_pmap); |
669e846e SL |
143 | |
144 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
145 | kvm_arch_vcpu_free(vcpu); | |
146 | } | |
147 | ||
148 | mutex_lock(&kvm->lock); | |
149 | ||
150 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
151 | kvm->vcpus[i] = NULL; | |
152 | ||
153 | atomic_set(&kvm->online_vcpus, 0); | |
154 | ||
155 | mutex_unlock(&kvm->lock); | |
156 | } | |
157 | ||
669e846e SL |
158 | static void kvm_mips_uninit_tlbs(void *arg) |
159 | { | |
160 | /* Restore wired count */ | |
161 | write_c0_wired(0); | |
162 | mtc0_tlbw_hazard(); | |
163 | /* Clear out all the TLBs */ | |
164 | kvm_local_flush_tlb_all(); | |
165 | } | |
166 | ||
167 | void kvm_arch_destroy_vm(struct kvm *kvm) | |
168 | { | |
169 | kvm_mips_free_vcpus(kvm); | |
170 | ||
171 | /* If this is the last instance, restore wired count */ | |
172 | if (atomic_dec_return(&kvm_mips_instance) == 0) { | |
6e95bfd2 JH |
173 | kvm_debug("%s: last KVM instance, restoring TLB parameters\n", |
174 | __func__); | |
669e846e SL |
175 | on_each_cpu(kvm_mips_uninit_tlbs, NULL, 1); |
176 | } | |
177 | } | |
178 | ||
d116e812 DCZ |
179 | long kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, |
180 | unsigned long arg) | |
669e846e | 181 | { |
ed829857 | 182 | return -ENOIOCTLCMD; |
669e846e SL |
183 | } |
184 | ||
5587027c AK |
185 | int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, |
186 | unsigned long npages) | |
669e846e SL |
187 | { |
188 | return 0; | |
189 | } | |
190 | ||
191 | int kvm_arch_prepare_memory_region(struct kvm *kvm, | |
d116e812 DCZ |
192 | struct kvm_memory_slot *memslot, |
193 | struct kvm_userspace_memory_region *mem, | |
194 | enum kvm_mr_change change) | |
669e846e SL |
195 | { |
196 | return 0; | |
197 | } | |
198 | ||
199 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
d116e812 DCZ |
200 | struct kvm_userspace_memory_region *mem, |
201 | const struct kvm_memory_slot *old, | |
202 | enum kvm_mr_change change) | |
669e846e SL |
203 | { |
204 | unsigned long npages = 0; | |
d98403a5 | 205 | int i; |
669e846e SL |
206 | |
207 | kvm_debug("%s: kvm: %p slot: %d, GPA: %llx, size: %llx, QVA: %llx\n", | |
208 | __func__, kvm, mem->slot, mem->guest_phys_addr, | |
209 | mem->memory_size, mem->userspace_addr); | |
210 | ||
211 | /* Setup Guest PMAP table */ | |
212 | if (!kvm->arch.guest_pmap) { | |
213 | if (mem->slot == 0) | |
214 | npages = mem->memory_size >> PAGE_SHIFT; | |
215 | ||
216 | if (npages) { | |
217 | kvm->arch.guest_pmap_npages = npages; | |
218 | kvm->arch.guest_pmap = | |
219 | kzalloc(npages * sizeof(unsigned long), GFP_KERNEL); | |
220 | ||
221 | if (!kvm->arch.guest_pmap) { | |
222 | kvm_err("Failed to allocate guest PMAP"); | |
d98403a5 | 223 | return; |
669e846e SL |
224 | } |
225 | ||
6e95bfd2 JH |
226 | kvm_debug("Allocated space for Guest PMAP Table (%ld pages) @ %p\n", |
227 | npages, kvm->arch.guest_pmap); | |
669e846e SL |
228 | |
229 | /* Now setup the page table */ | |
d116e812 | 230 | for (i = 0; i < npages; i++) |
669e846e | 231 | kvm->arch.guest_pmap[i] = KVM_INVALID_PAGE; |
669e846e SL |
232 | } |
233 | } | |
669e846e SL |
234 | } |
235 | ||
669e846e SL |
236 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) |
237 | { | |
669e846e SL |
238 | int err, size, offset; |
239 | void *gebase; | |
240 | int i; | |
241 | ||
242 | struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); | |
243 | ||
244 | if (!vcpu) { | |
245 | err = -ENOMEM; | |
246 | goto out; | |
247 | } | |
248 | ||
249 | err = kvm_vcpu_init(vcpu, kvm, id); | |
250 | ||
251 | if (err) | |
252 | goto out_free_cpu; | |
253 | ||
6e95bfd2 | 254 | kvm_debug("kvm @ %p: create cpu %d at %p\n", kvm, id, vcpu); |
669e846e | 255 | |
d116e812 DCZ |
256 | /* |
257 | * Allocate space for host mode exception handlers that handle | |
669e846e SL |
258 | * guest mode exits |
259 | */ | |
d116e812 | 260 | if (cpu_has_veic || cpu_has_vint) |
669e846e | 261 | size = 0x200 + VECTORSPACING * 64; |
d116e812 | 262 | else |
7006e2df | 263 | size = 0x4000; |
669e846e SL |
264 | |
265 | /* Save Linux EBASE */ | |
266 | vcpu->arch.host_ebase = (void *)read_c0_ebase(); | |
267 | ||
268 | gebase = kzalloc(ALIGN(size, PAGE_SIZE), GFP_KERNEL); | |
269 | ||
270 | if (!gebase) { | |
271 | err = -ENOMEM; | |
272 | goto out_free_cpu; | |
273 | } | |
6e95bfd2 JH |
274 | kvm_debug("Allocated %d bytes for KVM Exception Handlers @ %p\n", |
275 | ALIGN(size, PAGE_SIZE), gebase); | |
669e846e SL |
276 | |
277 | /* Save new ebase */ | |
278 | vcpu->arch.guest_ebase = gebase; | |
279 | ||
280 | /* Copy L1 Guest Exception handler to correct offset */ | |
281 | ||
282 | /* TLB Refill, EXL = 0 */ | |
283 | memcpy(gebase, mips32_exception, | |
284 | mips32_exceptionEnd - mips32_exception); | |
285 | ||
286 | /* General Exception Entry point */ | |
287 | memcpy(gebase + 0x180, mips32_exception, | |
288 | mips32_exceptionEnd - mips32_exception); | |
289 | ||
290 | /* For vectored interrupts poke the exception code @ all offsets 0-7 */ | |
291 | for (i = 0; i < 8; i++) { | |
292 | kvm_debug("L1 Vectored handler @ %p\n", | |
293 | gebase + 0x200 + (i * VECTORSPACING)); | |
294 | memcpy(gebase + 0x200 + (i * VECTORSPACING), mips32_exception, | |
295 | mips32_exceptionEnd - mips32_exception); | |
296 | } | |
297 | ||
298 | /* General handler, relocate to unmapped space for sanity's sake */ | |
299 | offset = 0x2000; | |
6e95bfd2 JH |
300 | kvm_debug("Installing KVM Exception handlers @ %p, %#x bytes\n", |
301 | gebase + offset, | |
302 | mips32_GuestExceptionEnd - mips32_GuestException); | |
669e846e SL |
303 | |
304 | memcpy(gebase + offset, mips32_GuestException, | |
305 | mips32_GuestExceptionEnd - mips32_GuestException); | |
306 | ||
307 | /* Invalidate the icache for these ranges */ | |
facaaec1 JH |
308 | local_flush_icache_range((unsigned long)gebase, |
309 | (unsigned long)gebase + ALIGN(size, PAGE_SIZE)); | |
669e846e | 310 | |
d116e812 DCZ |
311 | /* |
312 | * Allocate comm page for guest kernel, a TLB will be reserved for | |
313 | * mapping GVA @ 0xFFFF8000 to this page | |
314 | */ | |
669e846e SL |
315 | vcpu->arch.kseg0_commpage = kzalloc(PAGE_SIZE << 1, GFP_KERNEL); |
316 | ||
317 | if (!vcpu->arch.kseg0_commpage) { | |
318 | err = -ENOMEM; | |
319 | goto out_free_gebase; | |
320 | } | |
321 | ||
6e95bfd2 | 322 | kvm_debug("Allocated COMM page @ %p\n", vcpu->arch.kseg0_commpage); |
669e846e SL |
323 | kvm_mips_commpage_init(vcpu); |
324 | ||
325 | /* Init */ | |
326 | vcpu->arch.last_sched_cpu = -1; | |
327 | ||
328 | /* Start off the timer */ | |
e30492bb | 329 | kvm_mips_init_count(vcpu); |
669e846e SL |
330 | |
331 | return vcpu; | |
332 | ||
333 | out_free_gebase: | |
334 | kfree(gebase); | |
335 | ||
336 | out_free_cpu: | |
337 | kfree(vcpu); | |
338 | ||
339 | out: | |
340 | return ERR_PTR(err); | |
341 | } | |
342 | ||
343 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
344 | { | |
345 | hrtimer_cancel(&vcpu->arch.comparecount_timer); | |
346 | ||
347 | kvm_vcpu_uninit(vcpu); | |
348 | ||
349 | kvm_mips_dump_stats(vcpu); | |
350 | ||
c6c0a663 JH |
351 | kfree(vcpu->arch.guest_ebase); |
352 | kfree(vcpu->arch.kseg0_commpage); | |
8c9eb041 | 353 | kfree(vcpu); |
669e846e SL |
354 | } |
355 | ||
356 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
357 | { | |
358 | kvm_arch_vcpu_free(vcpu); | |
359 | } | |
360 | ||
d116e812 DCZ |
361 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
362 | struct kvm_guest_debug *dbg) | |
669e846e | 363 | { |
ed829857 | 364 | return -ENOIOCTLCMD; |
669e846e SL |
365 | } |
366 | ||
367 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
368 | { | |
369 | int r = 0; | |
370 | sigset_t sigsaved; | |
371 | ||
372 | if (vcpu->sigset_active) | |
373 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
374 | ||
375 | if (vcpu->mmio_needed) { | |
376 | if (!vcpu->mmio_is_write) | |
377 | kvm_mips_complete_mmio_load(vcpu, run); | |
378 | vcpu->mmio_needed = 0; | |
379 | } | |
380 | ||
044f0f03 | 381 | local_irq_disable(); |
669e846e SL |
382 | /* Check if we have any exceptions/interrupts pending */ |
383 | kvm_mips_deliver_interrupts(vcpu, | |
384 | kvm_read_c0_guest_cause(vcpu->arch.cop0)); | |
385 | ||
669e846e SL |
386 | kvm_guest_enter(); |
387 | ||
388 | r = __kvm_mips_vcpu_run(run, vcpu); | |
389 | ||
390 | kvm_guest_exit(); | |
391 | local_irq_enable(); | |
392 | ||
393 | if (vcpu->sigset_active) | |
394 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
395 | ||
396 | return r; | |
397 | } | |
398 | ||
d116e812 DCZ |
399 | int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
400 | struct kvm_mips_interrupt *irq) | |
669e846e SL |
401 | { |
402 | int intr = (int)irq->irq; | |
403 | struct kvm_vcpu *dvcpu = NULL; | |
404 | ||
405 | if (intr == 3 || intr == -3 || intr == 4 || intr == -4) | |
406 | kvm_debug("%s: CPU: %d, INTR: %d\n", __func__, irq->cpu, | |
407 | (int)intr); | |
408 | ||
409 | if (irq->cpu == -1) | |
410 | dvcpu = vcpu; | |
411 | else | |
412 | dvcpu = vcpu->kvm->vcpus[irq->cpu]; | |
413 | ||
414 | if (intr == 2 || intr == 3 || intr == 4) { | |
415 | kvm_mips_callbacks->queue_io_int(dvcpu, irq); | |
416 | ||
417 | } else if (intr == -2 || intr == -3 || intr == -4) { | |
418 | kvm_mips_callbacks->dequeue_io_int(dvcpu, irq); | |
419 | } else { | |
420 | kvm_err("%s: invalid interrupt ioctl (%d:%d)\n", __func__, | |
421 | irq->cpu, irq->irq); | |
422 | return -EINVAL; | |
423 | } | |
424 | ||
425 | dvcpu->arch.wait = 0; | |
426 | ||
d116e812 | 427 | if (waitqueue_active(&dvcpu->wq)) |
669e846e | 428 | wake_up_interruptible(&dvcpu->wq); |
669e846e SL |
429 | |
430 | return 0; | |
431 | } | |
432 | ||
d116e812 DCZ |
433 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
434 | struct kvm_mp_state *mp_state) | |
669e846e | 435 | { |
ed829857 | 436 | return -ENOIOCTLCMD; |
669e846e SL |
437 | } |
438 | ||
d116e812 DCZ |
439 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
440 | struct kvm_mp_state *mp_state) | |
669e846e | 441 | { |
ed829857 | 442 | return -ENOIOCTLCMD; |
669e846e SL |
443 | } |
444 | ||
4c73fb2b DD |
445 | static u64 kvm_mips_get_one_regs[] = { |
446 | KVM_REG_MIPS_R0, | |
447 | KVM_REG_MIPS_R1, | |
448 | KVM_REG_MIPS_R2, | |
449 | KVM_REG_MIPS_R3, | |
450 | KVM_REG_MIPS_R4, | |
451 | KVM_REG_MIPS_R5, | |
452 | KVM_REG_MIPS_R6, | |
453 | KVM_REG_MIPS_R7, | |
454 | KVM_REG_MIPS_R8, | |
455 | KVM_REG_MIPS_R9, | |
456 | KVM_REG_MIPS_R10, | |
457 | KVM_REG_MIPS_R11, | |
458 | KVM_REG_MIPS_R12, | |
459 | KVM_REG_MIPS_R13, | |
460 | KVM_REG_MIPS_R14, | |
461 | KVM_REG_MIPS_R15, | |
462 | KVM_REG_MIPS_R16, | |
463 | KVM_REG_MIPS_R17, | |
464 | KVM_REG_MIPS_R18, | |
465 | KVM_REG_MIPS_R19, | |
466 | KVM_REG_MIPS_R20, | |
467 | KVM_REG_MIPS_R21, | |
468 | KVM_REG_MIPS_R22, | |
469 | KVM_REG_MIPS_R23, | |
470 | KVM_REG_MIPS_R24, | |
471 | KVM_REG_MIPS_R25, | |
472 | KVM_REG_MIPS_R26, | |
473 | KVM_REG_MIPS_R27, | |
474 | KVM_REG_MIPS_R28, | |
475 | KVM_REG_MIPS_R29, | |
476 | KVM_REG_MIPS_R30, | |
477 | KVM_REG_MIPS_R31, | |
478 | ||
479 | KVM_REG_MIPS_HI, | |
480 | KVM_REG_MIPS_LO, | |
481 | KVM_REG_MIPS_PC, | |
482 | ||
483 | KVM_REG_MIPS_CP0_INDEX, | |
484 | KVM_REG_MIPS_CP0_CONTEXT, | |
7767b7d2 | 485 | KVM_REG_MIPS_CP0_USERLOCAL, |
4c73fb2b DD |
486 | KVM_REG_MIPS_CP0_PAGEMASK, |
487 | KVM_REG_MIPS_CP0_WIRED, | |
16fd5c1d | 488 | KVM_REG_MIPS_CP0_HWRENA, |
4c73fb2b | 489 | KVM_REG_MIPS_CP0_BADVADDR, |
f8be02da | 490 | KVM_REG_MIPS_CP0_COUNT, |
4c73fb2b | 491 | KVM_REG_MIPS_CP0_ENTRYHI, |
f8be02da | 492 | KVM_REG_MIPS_CP0_COMPARE, |
4c73fb2b DD |
493 | KVM_REG_MIPS_CP0_STATUS, |
494 | KVM_REG_MIPS_CP0_CAUSE, | |
fb6df0cd | 495 | KVM_REG_MIPS_CP0_EPC, |
4c73fb2b DD |
496 | KVM_REG_MIPS_CP0_CONFIG, |
497 | KVM_REG_MIPS_CP0_CONFIG1, | |
498 | KVM_REG_MIPS_CP0_CONFIG2, | |
499 | KVM_REG_MIPS_CP0_CONFIG3, | |
500 | KVM_REG_MIPS_CP0_CONFIG7, | |
f8239342 JH |
501 | KVM_REG_MIPS_CP0_ERROREPC, |
502 | ||
503 | KVM_REG_MIPS_COUNT_CTL, | |
504 | KVM_REG_MIPS_COUNT_RESUME, | |
f74a8e22 | 505 | KVM_REG_MIPS_COUNT_HZ, |
4c73fb2b DD |
506 | }; |
507 | ||
508 | static int kvm_mips_get_reg(struct kvm_vcpu *vcpu, | |
509 | const struct kvm_one_reg *reg) | |
510 | { | |
4c73fb2b | 511 | struct mips_coproc *cop0 = vcpu->arch.cop0; |
f8be02da | 512 | int ret; |
4c73fb2b DD |
513 | s64 v; |
514 | ||
515 | switch (reg->id) { | |
516 | case KVM_REG_MIPS_R0 ... KVM_REG_MIPS_R31: | |
517 | v = (long)vcpu->arch.gprs[reg->id - KVM_REG_MIPS_R0]; | |
518 | break; | |
519 | case KVM_REG_MIPS_HI: | |
520 | v = (long)vcpu->arch.hi; | |
521 | break; | |
522 | case KVM_REG_MIPS_LO: | |
523 | v = (long)vcpu->arch.lo; | |
524 | break; | |
525 | case KVM_REG_MIPS_PC: | |
526 | v = (long)vcpu->arch.pc; | |
527 | break; | |
528 | ||
529 | case KVM_REG_MIPS_CP0_INDEX: | |
530 | v = (long)kvm_read_c0_guest_index(cop0); | |
531 | break; | |
532 | case KVM_REG_MIPS_CP0_CONTEXT: | |
533 | v = (long)kvm_read_c0_guest_context(cop0); | |
534 | break; | |
7767b7d2 JH |
535 | case KVM_REG_MIPS_CP0_USERLOCAL: |
536 | v = (long)kvm_read_c0_guest_userlocal(cop0); | |
537 | break; | |
4c73fb2b DD |
538 | case KVM_REG_MIPS_CP0_PAGEMASK: |
539 | v = (long)kvm_read_c0_guest_pagemask(cop0); | |
540 | break; | |
541 | case KVM_REG_MIPS_CP0_WIRED: | |
542 | v = (long)kvm_read_c0_guest_wired(cop0); | |
543 | break; | |
16fd5c1d JH |
544 | case KVM_REG_MIPS_CP0_HWRENA: |
545 | v = (long)kvm_read_c0_guest_hwrena(cop0); | |
546 | break; | |
4c73fb2b DD |
547 | case KVM_REG_MIPS_CP0_BADVADDR: |
548 | v = (long)kvm_read_c0_guest_badvaddr(cop0); | |
549 | break; | |
550 | case KVM_REG_MIPS_CP0_ENTRYHI: | |
551 | v = (long)kvm_read_c0_guest_entryhi(cop0); | |
552 | break; | |
f8be02da JH |
553 | case KVM_REG_MIPS_CP0_COMPARE: |
554 | v = (long)kvm_read_c0_guest_compare(cop0); | |
555 | break; | |
4c73fb2b DD |
556 | case KVM_REG_MIPS_CP0_STATUS: |
557 | v = (long)kvm_read_c0_guest_status(cop0); | |
558 | break; | |
559 | case KVM_REG_MIPS_CP0_CAUSE: | |
560 | v = (long)kvm_read_c0_guest_cause(cop0); | |
561 | break; | |
fb6df0cd JH |
562 | case KVM_REG_MIPS_CP0_EPC: |
563 | v = (long)kvm_read_c0_guest_epc(cop0); | |
564 | break; | |
4c73fb2b DD |
565 | case KVM_REG_MIPS_CP0_ERROREPC: |
566 | v = (long)kvm_read_c0_guest_errorepc(cop0); | |
567 | break; | |
568 | case KVM_REG_MIPS_CP0_CONFIG: | |
569 | v = (long)kvm_read_c0_guest_config(cop0); | |
570 | break; | |
571 | case KVM_REG_MIPS_CP0_CONFIG1: | |
572 | v = (long)kvm_read_c0_guest_config1(cop0); | |
573 | break; | |
574 | case KVM_REG_MIPS_CP0_CONFIG2: | |
575 | v = (long)kvm_read_c0_guest_config2(cop0); | |
576 | break; | |
577 | case KVM_REG_MIPS_CP0_CONFIG3: | |
578 | v = (long)kvm_read_c0_guest_config3(cop0); | |
579 | break; | |
580 | case KVM_REG_MIPS_CP0_CONFIG7: | |
581 | v = (long)kvm_read_c0_guest_config7(cop0); | |
582 | break; | |
f8be02da JH |
583 | /* registers to be handled specially */ |
584 | case KVM_REG_MIPS_CP0_COUNT: | |
f8239342 JH |
585 | case KVM_REG_MIPS_COUNT_CTL: |
586 | case KVM_REG_MIPS_COUNT_RESUME: | |
f74a8e22 | 587 | case KVM_REG_MIPS_COUNT_HZ: |
f8be02da JH |
588 | ret = kvm_mips_callbacks->get_one_reg(vcpu, reg, &v); |
589 | if (ret) | |
590 | return ret; | |
591 | break; | |
4c73fb2b DD |
592 | default: |
593 | return -EINVAL; | |
594 | } | |
681865d4 DD |
595 | if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U64) { |
596 | u64 __user *uaddr64 = (u64 __user *)(long)reg->addr; | |
d116e812 | 597 | |
681865d4 DD |
598 | return put_user(v, uaddr64); |
599 | } else if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U32) { | |
600 | u32 __user *uaddr32 = (u32 __user *)(long)reg->addr; | |
601 | u32 v32 = (u32)v; | |
d116e812 | 602 | |
681865d4 DD |
603 | return put_user(v32, uaddr32); |
604 | } else { | |
605 | return -EINVAL; | |
606 | } | |
4c73fb2b DD |
607 | } |
608 | ||
609 | static int kvm_mips_set_reg(struct kvm_vcpu *vcpu, | |
610 | const struct kvm_one_reg *reg) | |
611 | { | |
4c73fb2b DD |
612 | struct mips_coproc *cop0 = vcpu->arch.cop0; |
613 | u64 v; | |
614 | ||
681865d4 DD |
615 | if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U64) { |
616 | u64 __user *uaddr64 = (u64 __user *)(long)reg->addr; | |
617 | ||
618 | if (get_user(v, uaddr64) != 0) | |
619 | return -EFAULT; | |
620 | } else if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U32) { | |
621 | u32 __user *uaddr32 = (u32 __user *)(long)reg->addr; | |
622 | s32 v32; | |
623 | ||
624 | if (get_user(v32, uaddr32) != 0) | |
625 | return -EFAULT; | |
626 | v = (s64)v32; | |
627 | } else { | |
628 | return -EINVAL; | |
629 | } | |
4c73fb2b DD |
630 | |
631 | switch (reg->id) { | |
632 | case KVM_REG_MIPS_R0: | |
633 | /* Silently ignore requests to set $0 */ | |
634 | break; | |
635 | case KVM_REG_MIPS_R1 ... KVM_REG_MIPS_R31: | |
636 | vcpu->arch.gprs[reg->id - KVM_REG_MIPS_R0] = v; | |
637 | break; | |
638 | case KVM_REG_MIPS_HI: | |
639 | vcpu->arch.hi = v; | |
640 | break; | |
641 | case KVM_REG_MIPS_LO: | |
642 | vcpu->arch.lo = v; | |
643 | break; | |
644 | case KVM_REG_MIPS_PC: | |
645 | vcpu->arch.pc = v; | |
646 | break; | |
647 | ||
648 | case KVM_REG_MIPS_CP0_INDEX: | |
649 | kvm_write_c0_guest_index(cop0, v); | |
650 | break; | |
651 | case KVM_REG_MIPS_CP0_CONTEXT: | |
652 | kvm_write_c0_guest_context(cop0, v); | |
653 | break; | |
7767b7d2 JH |
654 | case KVM_REG_MIPS_CP0_USERLOCAL: |
655 | kvm_write_c0_guest_userlocal(cop0, v); | |
656 | break; | |
4c73fb2b DD |
657 | case KVM_REG_MIPS_CP0_PAGEMASK: |
658 | kvm_write_c0_guest_pagemask(cop0, v); | |
659 | break; | |
660 | case KVM_REG_MIPS_CP0_WIRED: | |
661 | kvm_write_c0_guest_wired(cop0, v); | |
662 | break; | |
16fd5c1d JH |
663 | case KVM_REG_MIPS_CP0_HWRENA: |
664 | kvm_write_c0_guest_hwrena(cop0, v); | |
665 | break; | |
4c73fb2b DD |
666 | case KVM_REG_MIPS_CP0_BADVADDR: |
667 | kvm_write_c0_guest_badvaddr(cop0, v); | |
668 | break; | |
669 | case KVM_REG_MIPS_CP0_ENTRYHI: | |
670 | kvm_write_c0_guest_entryhi(cop0, v); | |
671 | break; | |
672 | case KVM_REG_MIPS_CP0_STATUS: | |
673 | kvm_write_c0_guest_status(cop0, v); | |
674 | break; | |
fb6df0cd JH |
675 | case KVM_REG_MIPS_CP0_EPC: |
676 | kvm_write_c0_guest_epc(cop0, v); | |
677 | break; | |
4c73fb2b DD |
678 | case KVM_REG_MIPS_CP0_ERROREPC: |
679 | kvm_write_c0_guest_errorepc(cop0, v); | |
680 | break; | |
f8be02da JH |
681 | /* registers to be handled specially */ |
682 | case KVM_REG_MIPS_CP0_COUNT: | |
683 | case KVM_REG_MIPS_CP0_COMPARE: | |
e30492bb | 684 | case KVM_REG_MIPS_CP0_CAUSE: |
f8239342 JH |
685 | case KVM_REG_MIPS_COUNT_CTL: |
686 | case KVM_REG_MIPS_COUNT_RESUME: | |
f74a8e22 | 687 | case KVM_REG_MIPS_COUNT_HZ: |
f8be02da | 688 | return kvm_mips_callbacks->set_one_reg(vcpu, reg, v); |
4c73fb2b DD |
689 | default: |
690 | return -EINVAL; | |
691 | } | |
692 | return 0; | |
693 | } | |
694 | ||
d116e812 DCZ |
695 | long kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, |
696 | unsigned long arg) | |
669e846e SL |
697 | { |
698 | struct kvm_vcpu *vcpu = filp->private_data; | |
699 | void __user *argp = (void __user *)arg; | |
700 | long r; | |
669e846e SL |
701 | |
702 | switch (ioctl) { | |
4c73fb2b DD |
703 | case KVM_SET_ONE_REG: |
704 | case KVM_GET_ONE_REG: { | |
705 | struct kvm_one_reg reg; | |
d116e812 | 706 | |
4c73fb2b DD |
707 | if (copy_from_user(®, argp, sizeof(reg))) |
708 | return -EFAULT; | |
709 | if (ioctl == KVM_SET_ONE_REG) | |
710 | return kvm_mips_set_reg(vcpu, ®); | |
711 | else | |
712 | return kvm_mips_get_reg(vcpu, ®); | |
713 | } | |
714 | case KVM_GET_REG_LIST: { | |
715 | struct kvm_reg_list __user *user_list = argp; | |
716 | u64 __user *reg_dest; | |
717 | struct kvm_reg_list reg_list; | |
718 | unsigned n; | |
719 | ||
720 | if (copy_from_user(®_list, user_list, sizeof(reg_list))) | |
721 | return -EFAULT; | |
722 | n = reg_list.n; | |
723 | reg_list.n = ARRAY_SIZE(kvm_mips_get_one_regs); | |
724 | if (copy_to_user(user_list, ®_list, sizeof(reg_list))) | |
725 | return -EFAULT; | |
726 | if (n < reg_list.n) | |
727 | return -E2BIG; | |
728 | reg_dest = user_list->reg; | |
729 | if (copy_to_user(reg_dest, kvm_mips_get_one_regs, | |
730 | sizeof(kvm_mips_get_one_regs))) | |
731 | return -EFAULT; | |
732 | return 0; | |
733 | } | |
669e846e SL |
734 | case KVM_NMI: |
735 | /* Treat the NMI as a CPU reset */ | |
736 | r = kvm_mips_reset_vcpu(vcpu); | |
737 | break; | |
738 | case KVM_INTERRUPT: | |
739 | { | |
740 | struct kvm_mips_interrupt irq; | |
d116e812 | 741 | |
669e846e SL |
742 | r = -EFAULT; |
743 | if (copy_from_user(&irq, argp, sizeof(irq))) | |
744 | goto out; | |
745 | ||
669e846e SL |
746 | kvm_debug("[%d] %s: irq: %d\n", vcpu->vcpu_id, __func__, |
747 | irq.irq); | |
748 | ||
749 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
750 | break; | |
751 | } | |
752 | default: | |
4c73fb2b | 753 | r = -ENOIOCTLCMD; |
669e846e SL |
754 | } |
755 | ||
756 | out: | |
757 | return r; | |
758 | } | |
759 | ||
d116e812 | 760 | /* Get (and clear) the dirty memory log for a memory slot. */ |
669e846e SL |
761 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
762 | { | |
763 | struct kvm_memory_slot *memslot; | |
764 | unsigned long ga, ga_end; | |
765 | int is_dirty = 0; | |
766 | int r; | |
767 | unsigned long n; | |
768 | ||
769 | mutex_lock(&kvm->slots_lock); | |
770 | ||
771 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
772 | if (r) | |
773 | goto out; | |
774 | ||
775 | /* If nothing is dirty, don't bother messing with page tables. */ | |
776 | if (is_dirty) { | |
777 | memslot = &kvm->memslots->memslots[log->slot]; | |
778 | ||
779 | ga = memslot->base_gfn << PAGE_SHIFT; | |
780 | ga_end = ga + (memslot->npages << PAGE_SHIFT); | |
781 | ||
6ad78a5c DCZ |
782 | kvm_info("%s: dirty, ga: %#lx, ga_end %#lx\n", __func__, ga, |
783 | ga_end); | |
669e846e SL |
784 | |
785 | n = kvm_dirty_bitmap_bytes(memslot); | |
786 | memset(memslot->dirty_bitmap, 0, n); | |
787 | } | |
788 | ||
789 | r = 0; | |
790 | out: | |
791 | mutex_unlock(&kvm->slots_lock); | |
792 | return r; | |
793 | ||
794 | } | |
795 | ||
796 | long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) | |
797 | { | |
798 | long r; | |
799 | ||
800 | switch (ioctl) { | |
801 | default: | |
ed829857 | 802 | r = -ENOIOCTLCMD; |
669e846e SL |
803 | } |
804 | ||
805 | return r; | |
806 | } | |
807 | ||
808 | int kvm_arch_init(void *opaque) | |
809 | { | |
669e846e SL |
810 | if (kvm_mips_callbacks) { |
811 | kvm_err("kvm: module already exists\n"); | |
812 | return -EEXIST; | |
813 | } | |
814 | ||
d98403a5 | 815 | return kvm_mips_emulation_init(&kvm_mips_callbacks); |
669e846e SL |
816 | } |
817 | ||
818 | void kvm_arch_exit(void) | |
819 | { | |
820 | kvm_mips_callbacks = NULL; | |
821 | } | |
822 | ||
d116e812 DCZ |
823 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
824 | struct kvm_sregs *sregs) | |
669e846e | 825 | { |
ed829857 | 826 | return -ENOIOCTLCMD; |
669e846e SL |
827 | } |
828 | ||
d116e812 DCZ |
829 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
830 | struct kvm_sregs *sregs) | |
669e846e | 831 | { |
ed829857 | 832 | return -ENOIOCTLCMD; |
669e846e SL |
833 | } |
834 | ||
31928aa5 | 835 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
669e846e | 836 | { |
669e846e SL |
837 | } |
838 | ||
839 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
840 | { | |
ed829857 | 841 | return -ENOIOCTLCMD; |
669e846e SL |
842 | } |
843 | ||
844 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
845 | { | |
ed829857 | 846 | return -ENOIOCTLCMD; |
669e846e SL |
847 | } |
848 | ||
849 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) | |
850 | { | |
851 | return VM_FAULT_SIGBUS; | |
852 | } | |
853 | ||
784aa3d7 | 854 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
669e846e SL |
855 | { |
856 | int r; | |
857 | ||
858 | switch (ext) { | |
4c73fb2b DD |
859 | case KVM_CAP_ONE_REG: |
860 | r = 1; | |
861 | break; | |
669e846e SL |
862 | case KVM_CAP_COALESCED_MMIO: |
863 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
864 | break; | |
865 | default: | |
866 | r = 0; | |
867 | break; | |
868 | } | |
869 | return r; | |
669e846e SL |
870 | } |
871 | ||
872 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
873 | { | |
874 | return kvm_mips_pending_timer(vcpu); | |
875 | } | |
876 | ||
877 | int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu) | |
878 | { | |
879 | int i; | |
880 | struct mips_coproc *cop0; | |
881 | ||
882 | if (!vcpu) | |
883 | return -1; | |
884 | ||
6ad78a5c DCZ |
885 | kvm_debug("VCPU Register Dump:\n"); |
886 | kvm_debug("\tpc = 0x%08lx\n", vcpu->arch.pc); | |
887 | kvm_debug("\texceptions: %08lx\n", vcpu->arch.pending_exceptions); | |
669e846e SL |
888 | |
889 | for (i = 0; i < 32; i += 4) { | |
6ad78a5c | 890 | kvm_debug("\tgpr%02d: %08lx %08lx %08lx %08lx\n", i, |
669e846e SL |
891 | vcpu->arch.gprs[i], |
892 | vcpu->arch.gprs[i + 1], | |
893 | vcpu->arch.gprs[i + 2], vcpu->arch.gprs[i + 3]); | |
894 | } | |
6ad78a5c DCZ |
895 | kvm_debug("\thi: 0x%08lx\n", vcpu->arch.hi); |
896 | kvm_debug("\tlo: 0x%08lx\n", vcpu->arch.lo); | |
669e846e SL |
897 | |
898 | cop0 = vcpu->arch.cop0; | |
6ad78a5c DCZ |
899 | kvm_debug("\tStatus: 0x%08lx, Cause: 0x%08lx\n", |
900 | kvm_read_c0_guest_status(cop0), | |
901 | kvm_read_c0_guest_cause(cop0)); | |
669e846e | 902 | |
6ad78a5c | 903 | kvm_debug("\tEPC: 0x%08lx\n", kvm_read_c0_guest_epc(cop0)); |
669e846e SL |
904 | |
905 | return 0; | |
906 | } | |
907 | ||
908 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
909 | { | |
910 | int i; | |
911 | ||
8d17dd04 | 912 | for (i = 1; i < ARRAY_SIZE(vcpu->arch.gprs); i++) |
bf32ebf6 | 913 | vcpu->arch.gprs[i] = regs->gpr[i]; |
8d17dd04 | 914 | vcpu->arch.gprs[0] = 0; /* zero is special, and cannot be set. */ |
669e846e SL |
915 | vcpu->arch.hi = regs->hi; |
916 | vcpu->arch.lo = regs->lo; | |
917 | vcpu->arch.pc = regs->pc; | |
918 | ||
4c73fb2b | 919 | return 0; |
669e846e SL |
920 | } |
921 | ||
922 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
923 | { | |
924 | int i; | |
925 | ||
8d17dd04 | 926 | for (i = 0; i < ARRAY_SIZE(vcpu->arch.gprs); i++) |
bf32ebf6 | 927 | regs->gpr[i] = vcpu->arch.gprs[i]; |
669e846e SL |
928 | |
929 | regs->hi = vcpu->arch.hi; | |
930 | regs->lo = vcpu->arch.lo; | |
931 | regs->pc = vcpu->arch.pc; | |
932 | ||
4c73fb2b | 933 | return 0; |
669e846e SL |
934 | } |
935 | ||
0fae34f4 | 936 | static void kvm_mips_comparecount_func(unsigned long data) |
669e846e SL |
937 | { |
938 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; | |
939 | ||
940 | kvm_mips_callbacks->queue_timer_int(vcpu); | |
941 | ||
942 | vcpu->arch.wait = 0; | |
d116e812 | 943 | if (waitqueue_active(&vcpu->wq)) |
669e846e | 944 | wake_up_interruptible(&vcpu->wq); |
669e846e SL |
945 | } |
946 | ||
d116e812 | 947 | /* low level hrtimer wake routine */ |
0fae34f4 | 948 | static enum hrtimer_restart kvm_mips_comparecount_wakeup(struct hrtimer *timer) |
669e846e SL |
949 | { |
950 | struct kvm_vcpu *vcpu; | |
951 | ||
952 | vcpu = container_of(timer, struct kvm_vcpu, arch.comparecount_timer); | |
953 | kvm_mips_comparecount_func((unsigned long) vcpu); | |
e30492bb | 954 | return kvm_mips_count_timeout(vcpu); |
669e846e SL |
955 | } |
956 | ||
957 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
958 | { | |
959 | kvm_mips_callbacks->vcpu_init(vcpu); | |
960 | hrtimer_init(&vcpu->arch.comparecount_timer, CLOCK_MONOTONIC, | |
961 | HRTIMER_MODE_REL); | |
962 | vcpu->arch.comparecount_timer.function = kvm_mips_comparecount_wakeup; | |
669e846e SL |
963 | return 0; |
964 | } | |
965 | ||
d116e812 DCZ |
966 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
967 | struct kvm_translation *tr) | |
669e846e SL |
968 | { |
969 | return 0; | |
970 | } | |
971 | ||
972 | /* Initial guest state */ | |
973 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
974 | { | |
975 | return kvm_mips_callbacks->vcpu_setup(vcpu); | |
976 | } | |
977 | ||
d116e812 | 978 | static void kvm_mips_set_c0_status(void) |
669e846e SL |
979 | { |
980 | uint32_t status = read_c0_status(); | |
981 | ||
982 | if (cpu_has_fpu) | |
983 | status |= (ST0_CU1); | |
984 | ||
985 | if (cpu_has_dsp) | |
986 | status |= (ST0_MX); | |
987 | ||
988 | write_c0_status(status); | |
989 | ehb(); | |
990 | } | |
991 | ||
992 | /* | |
993 | * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV) | |
994 | */ | |
995 | int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) | |
996 | { | |
997 | uint32_t cause = vcpu->arch.host_cp0_cause; | |
998 | uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; | |
999 | uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; | |
1000 | unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; | |
1001 | enum emulation_result er = EMULATE_DONE; | |
1002 | int ret = RESUME_GUEST; | |
1003 | ||
1004 | /* Set a default exit reason */ | |
1005 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
1006 | run->ready_for_interrupt_injection = 1; | |
1007 | ||
d116e812 DCZ |
1008 | /* |
1009 | * Set the appropriate status bits based on host CPU features, | |
1010 | * before we hit the scheduler | |
1011 | */ | |
669e846e SL |
1012 | kvm_mips_set_c0_status(); |
1013 | ||
1014 | local_irq_enable(); | |
1015 | ||
1016 | kvm_debug("kvm_mips_handle_exit: cause: %#x, PC: %p, kvm_run: %p, kvm_vcpu: %p\n", | |
1017 | cause, opc, run, vcpu); | |
1018 | ||
d116e812 DCZ |
1019 | /* |
1020 | * Do a privilege check, if in UM most of these exit conditions end up | |
669e846e SL |
1021 | * causing an exception to be delivered to the Guest Kernel |
1022 | */ | |
1023 | er = kvm_mips_check_privilege(cause, opc, run, vcpu); | |
1024 | if (er == EMULATE_PRIV_FAIL) { | |
1025 | goto skip_emul; | |
1026 | } else if (er == EMULATE_FAIL) { | |
1027 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
1028 | ret = RESUME_HOST; | |
1029 | goto skip_emul; | |
1030 | } | |
1031 | ||
1032 | switch (exccode) { | |
1033 | case T_INT: | |
1034 | kvm_debug("[%d]T_INT @ %p\n", vcpu->vcpu_id, opc); | |
1035 | ||
1036 | ++vcpu->stat.int_exits; | |
1037 | trace_kvm_exit(vcpu, INT_EXITS); | |
1038 | ||
d116e812 | 1039 | if (need_resched()) |
669e846e | 1040 | cond_resched(); |
669e846e SL |
1041 | |
1042 | ret = RESUME_GUEST; | |
1043 | break; | |
1044 | ||
1045 | case T_COP_UNUSABLE: | |
1046 | kvm_debug("T_COP_UNUSABLE: @ PC: %p\n", opc); | |
1047 | ||
1048 | ++vcpu->stat.cop_unusable_exits; | |
1049 | trace_kvm_exit(vcpu, COP_UNUSABLE_EXITS); | |
1050 | ret = kvm_mips_callbacks->handle_cop_unusable(vcpu); | |
1051 | /* XXXKYMA: Might need to return to user space */ | |
d116e812 | 1052 | if (run->exit_reason == KVM_EXIT_IRQ_WINDOW_OPEN) |
669e846e | 1053 | ret = RESUME_HOST; |
669e846e SL |
1054 | break; |
1055 | ||
1056 | case T_TLB_MOD: | |
1057 | ++vcpu->stat.tlbmod_exits; | |
1058 | trace_kvm_exit(vcpu, TLBMOD_EXITS); | |
1059 | ret = kvm_mips_callbacks->handle_tlb_mod(vcpu); | |
1060 | break; | |
1061 | ||
1062 | case T_TLB_ST_MISS: | |
d116e812 DCZ |
1063 | kvm_debug("TLB ST fault: cause %#x, status %#lx, PC: %p, BadVaddr: %#lx\n", |
1064 | cause, kvm_read_c0_guest_status(vcpu->arch.cop0), opc, | |
1065 | badvaddr); | |
669e846e SL |
1066 | |
1067 | ++vcpu->stat.tlbmiss_st_exits; | |
1068 | trace_kvm_exit(vcpu, TLBMISS_ST_EXITS); | |
1069 | ret = kvm_mips_callbacks->handle_tlb_st_miss(vcpu); | |
1070 | break; | |
1071 | ||
1072 | case T_TLB_LD_MISS: | |
1073 | kvm_debug("TLB LD fault: cause %#x, PC: %p, BadVaddr: %#lx\n", | |
1074 | cause, opc, badvaddr); | |
1075 | ||
1076 | ++vcpu->stat.tlbmiss_ld_exits; | |
1077 | trace_kvm_exit(vcpu, TLBMISS_LD_EXITS); | |
1078 | ret = kvm_mips_callbacks->handle_tlb_ld_miss(vcpu); | |
1079 | break; | |
1080 | ||
1081 | case T_ADDR_ERR_ST: | |
1082 | ++vcpu->stat.addrerr_st_exits; | |
1083 | trace_kvm_exit(vcpu, ADDRERR_ST_EXITS); | |
1084 | ret = kvm_mips_callbacks->handle_addr_err_st(vcpu); | |
1085 | break; | |
1086 | ||
1087 | case T_ADDR_ERR_LD: | |
1088 | ++vcpu->stat.addrerr_ld_exits; | |
1089 | trace_kvm_exit(vcpu, ADDRERR_LD_EXITS); | |
1090 | ret = kvm_mips_callbacks->handle_addr_err_ld(vcpu); | |
1091 | break; | |
1092 | ||
1093 | case T_SYSCALL: | |
1094 | ++vcpu->stat.syscall_exits; | |
1095 | trace_kvm_exit(vcpu, SYSCALL_EXITS); | |
1096 | ret = kvm_mips_callbacks->handle_syscall(vcpu); | |
1097 | break; | |
1098 | ||
1099 | case T_RES_INST: | |
1100 | ++vcpu->stat.resvd_inst_exits; | |
1101 | trace_kvm_exit(vcpu, RESVD_INST_EXITS); | |
1102 | ret = kvm_mips_callbacks->handle_res_inst(vcpu); | |
1103 | break; | |
1104 | ||
1105 | case T_BREAK: | |
1106 | ++vcpu->stat.break_inst_exits; | |
1107 | trace_kvm_exit(vcpu, BREAK_INST_EXITS); | |
1108 | ret = kvm_mips_callbacks->handle_break(vcpu); | |
1109 | break; | |
1110 | ||
1111 | default: | |
d116e812 DCZ |
1112 | kvm_err("Exception Code: %d, not yet handled, @ PC: %p, inst: 0x%08x BadVaddr: %#lx Status: %#lx\n", |
1113 | exccode, opc, kvm_get_inst(opc, vcpu), badvaddr, | |
1114 | kvm_read_c0_guest_status(vcpu->arch.cop0)); | |
669e846e SL |
1115 | kvm_arch_vcpu_dump_regs(vcpu); |
1116 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
1117 | ret = RESUME_HOST; | |
1118 | break; | |
1119 | ||
1120 | } | |
1121 | ||
1122 | skip_emul: | |
1123 | local_irq_disable(); | |
1124 | ||
1125 | if (er == EMULATE_DONE && !(ret & RESUME_HOST)) | |
1126 | kvm_mips_deliver_interrupts(vcpu, cause); | |
1127 | ||
1128 | if (!(ret & RESUME_HOST)) { | |
d116e812 | 1129 | /* Only check for signals if not already exiting to userspace */ |
669e846e SL |
1130 | if (signal_pending(current)) { |
1131 | run->exit_reason = KVM_EXIT_INTR; | |
1132 | ret = (-EINTR << 2) | RESUME_HOST; | |
1133 | ++vcpu->stat.signal_exits; | |
1134 | trace_kvm_exit(vcpu, SIGNAL_EXITS); | |
1135 | } | |
1136 | } | |
1137 | ||
1138 | return ret; | |
1139 | } | |
1140 | ||
1141 | int __init kvm_mips_init(void) | |
1142 | { | |
1143 | int ret; | |
1144 | ||
1145 | ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
1146 | ||
1147 | if (ret) | |
1148 | return ret; | |
1149 | ||
d116e812 DCZ |
1150 | /* |
1151 | * On MIPS, kernel modules are executed from "mapped space", which | |
1152 | * requires TLBs. The TLB handling code is statically linked with | |
d7d5b05f | 1153 | * the rest of the kernel (tlb.c) to avoid the possibility of |
d116e812 DCZ |
1154 | * double faulting. The issue is that the TLB code references |
1155 | * routines that are part of the the KVM module, which are only | |
1156 | * available once the module is loaded. | |
669e846e SL |
1157 | */ |
1158 | kvm_mips_gfn_to_pfn = gfn_to_pfn; | |
1159 | kvm_mips_release_pfn_clean = kvm_release_pfn_clean; | |
1160 | kvm_mips_is_error_pfn = is_error_pfn; | |
1161 | ||
1162 | pr_info("KVM/MIPS Initialized\n"); | |
1163 | return 0; | |
1164 | } | |
1165 | ||
1166 | void __exit kvm_mips_exit(void) | |
1167 | { | |
1168 | kvm_exit(); | |
1169 | ||
1170 | kvm_mips_gfn_to_pfn = NULL; | |
1171 | kvm_mips_release_pfn_clean = NULL; | |
1172 | kvm_mips_is_error_pfn = NULL; | |
1173 | ||
1174 | pr_info("KVM/MIPS unloaded\n"); | |
1175 | } | |
1176 | ||
1177 | module_init(kvm_mips_init); | |
1178 | module_exit(kvm_mips_exit); | |
1179 | ||
1180 | EXPORT_TRACEPOINT_SYMBOL(kvm_exit); |