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b024b793 XZ |
1 | |
2 | /* | |
3 | * kvm_ia64.c: Basic KVM suppport On Itanium series processors | |
4 | * | |
5 | * | |
6 | * Copyright (C) 2007, Intel Corporation. | |
7 | * Xiantao Zhang (xiantao.zhang@intel.com) | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms and conditions of the GNU General Public License, | |
11 | * version 2, as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope it will be useful, but WITHOUT | |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
16 | * more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along with | |
19 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
20 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/percpu.h> | |
27 | #include <linux/gfp.h> | |
28 | #include <linux/fs.h> | |
29 | #include <linux/smp.h> | |
30 | #include <linux/kvm_host.h> | |
31 | #include <linux/kvm.h> | |
32 | #include <linux/bitops.h> | |
33 | #include <linux/hrtimer.h> | |
34 | #include <linux/uaccess.h> | |
35 | ||
36 | #include <asm/pgtable.h> | |
37 | #include <asm/gcc_intrin.h> | |
38 | #include <asm/pal.h> | |
39 | #include <asm/cacheflush.h> | |
40 | #include <asm/div64.h> | |
41 | #include <asm/tlb.h> | |
42 | ||
43 | #include "misc.h" | |
44 | #include "vti.h" | |
45 | #include "iodev.h" | |
46 | #include "ioapic.h" | |
47 | #include "lapic.h" | |
48 | ||
49 | static unsigned long kvm_vmm_base; | |
50 | static unsigned long kvm_vsa_base; | |
51 | static unsigned long kvm_vm_buffer; | |
52 | static unsigned long kvm_vm_buffer_size; | |
53 | unsigned long kvm_vmm_gp; | |
54 | ||
55 | static long vp_env_info; | |
56 | ||
57 | static struct kvm_vmm_info *kvm_vmm_info; | |
58 | ||
59 | static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu); | |
60 | ||
61 | struct kvm_stats_debugfs_item debugfs_entries[] = { | |
62 | { NULL } | |
63 | }; | |
64 | ||
65 | ||
66 | struct fdesc{ | |
67 | unsigned long ip; | |
68 | unsigned long gp; | |
69 | }; | |
70 | ||
71 | static void kvm_flush_icache(unsigned long start, unsigned long len) | |
72 | { | |
73 | int l; | |
74 | ||
75 | for (l = 0; l < (len + 32); l += 32) | |
76 | ia64_fc(start + l); | |
77 | ||
78 | ia64_sync_i(); | |
79 | ia64_srlz_i(); | |
80 | } | |
81 | ||
82 | static void kvm_flush_tlb_all(void) | |
83 | { | |
84 | unsigned long i, j, count0, count1, stride0, stride1, addr; | |
85 | long flags; | |
86 | ||
87 | addr = local_cpu_data->ptce_base; | |
88 | count0 = local_cpu_data->ptce_count[0]; | |
89 | count1 = local_cpu_data->ptce_count[1]; | |
90 | stride0 = local_cpu_data->ptce_stride[0]; | |
91 | stride1 = local_cpu_data->ptce_stride[1]; | |
92 | ||
93 | local_irq_save(flags); | |
94 | for (i = 0; i < count0; ++i) { | |
95 | for (j = 0; j < count1; ++j) { | |
96 | ia64_ptce(addr); | |
97 | addr += stride1; | |
98 | } | |
99 | addr += stride0; | |
100 | } | |
101 | local_irq_restore(flags); | |
102 | ia64_srlz_i(); /* srlz.i implies srlz.d */ | |
103 | } | |
104 | ||
105 | long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler) | |
106 | { | |
107 | struct ia64_pal_retval iprv; | |
108 | ||
109 | PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva, | |
110 | (u64)opt_handler); | |
111 | ||
112 | return iprv.status; | |
113 | } | |
114 | ||
115 | static DEFINE_SPINLOCK(vp_lock); | |
116 | ||
117 | void kvm_arch_hardware_enable(void *garbage) | |
118 | { | |
119 | long status; | |
120 | long tmp_base; | |
121 | unsigned long pte; | |
122 | unsigned long saved_psr; | |
123 | int slot; | |
124 | ||
125 | pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), | |
126 | PAGE_KERNEL)); | |
127 | local_irq_save(saved_psr); | |
128 | slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT); | |
129 | if (slot < 0) | |
130 | return; | |
131 | local_irq_restore(saved_psr); | |
132 | ||
133 | spin_lock(&vp_lock); | |
134 | status = ia64_pal_vp_init_env(kvm_vsa_base ? | |
135 | VP_INIT_ENV : VP_INIT_ENV_INITALIZE, | |
136 | __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base); | |
137 | if (status != 0) { | |
138 | printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n"); | |
139 | return ; | |
140 | } | |
141 | ||
142 | if (!kvm_vsa_base) { | |
143 | kvm_vsa_base = tmp_base; | |
144 | printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base); | |
145 | } | |
146 | spin_unlock(&vp_lock); | |
147 | ia64_ptr_entry(0x3, slot); | |
148 | } | |
149 | ||
150 | void kvm_arch_hardware_disable(void *garbage) | |
151 | { | |
152 | ||
153 | long status; | |
154 | int slot; | |
155 | unsigned long pte; | |
156 | unsigned long saved_psr; | |
157 | unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA); | |
158 | ||
159 | pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), | |
160 | PAGE_KERNEL)); | |
161 | ||
162 | local_irq_save(saved_psr); | |
163 | slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT); | |
164 | if (slot < 0) | |
165 | return; | |
166 | local_irq_restore(saved_psr); | |
167 | ||
168 | status = ia64_pal_vp_exit_env(host_iva); | |
169 | if (status) | |
170 | printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n", | |
171 | status); | |
172 | ia64_ptr_entry(0x3, slot); | |
173 | } | |
174 | ||
175 | void kvm_arch_check_processor_compat(void *rtn) | |
176 | { | |
177 | *(int *)rtn = 0; | |
178 | } | |
179 | ||
180 | int kvm_dev_ioctl_check_extension(long ext) | |
181 | { | |
182 | ||
183 | int r; | |
184 | ||
185 | switch (ext) { | |
186 | case KVM_CAP_IRQCHIP: | |
187 | case KVM_CAP_USER_MEMORY: | |
188 | ||
189 | r = 1; | |
190 | break; | |
191 | default: | |
192 | r = 0; | |
193 | } | |
194 | return r; | |
195 | ||
196 | } | |
197 | ||
198 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, | |
199 | gpa_t addr) | |
200 | { | |
201 | struct kvm_io_device *dev; | |
202 | ||
203 | dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr); | |
204 | ||
205 | return dev; | |
206 | } | |
207 | ||
208 | static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
209 | { | |
210 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; | |
211 | kvm_run->hw.hardware_exit_reason = 1; | |
212 | return 0; | |
213 | } | |
214 | ||
215 | static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
216 | { | |
217 | struct kvm_mmio_req *p; | |
218 | struct kvm_io_device *mmio_dev; | |
219 | ||
220 | p = kvm_get_vcpu_ioreq(vcpu); | |
221 | ||
222 | if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS) | |
223 | goto mmio; | |
224 | vcpu->mmio_needed = 1; | |
225 | vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr; | |
226 | vcpu->mmio_size = kvm_run->mmio.len = p->size; | |
227 | vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir; | |
228 | ||
229 | if (vcpu->mmio_is_write) | |
230 | memcpy(vcpu->mmio_data, &p->data, p->size); | |
231 | memcpy(kvm_run->mmio.data, &p->data, p->size); | |
232 | kvm_run->exit_reason = KVM_EXIT_MMIO; | |
233 | return 0; | |
234 | mmio: | |
235 | mmio_dev = vcpu_find_mmio_dev(vcpu, p->addr); | |
236 | if (mmio_dev) { | |
237 | if (!p->dir) | |
238 | kvm_iodevice_write(mmio_dev, p->addr, p->size, | |
239 | &p->data); | |
240 | else | |
241 | kvm_iodevice_read(mmio_dev, p->addr, p->size, | |
242 | &p->data); | |
243 | ||
244 | } else | |
245 | printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr); | |
246 | p->state = STATE_IORESP_READY; | |
247 | ||
248 | return 1; | |
249 | } | |
250 | ||
251 | static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
252 | { | |
253 | struct exit_ctl_data *p; | |
254 | ||
255 | p = kvm_get_exit_data(vcpu); | |
256 | ||
257 | if (p->exit_reason == EXIT_REASON_PAL_CALL) | |
258 | return kvm_pal_emul(vcpu, kvm_run); | |
259 | else { | |
260 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; | |
261 | kvm_run->hw.hardware_exit_reason = 2; | |
262 | return 0; | |
263 | } | |
264 | } | |
265 | ||
266 | static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
267 | { | |
268 | struct exit_ctl_data *p; | |
269 | ||
270 | p = kvm_get_exit_data(vcpu); | |
271 | ||
272 | if (p->exit_reason == EXIT_REASON_SAL_CALL) { | |
273 | kvm_sal_emul(vcpu); | |
274 | return 1; | |
275 | } else { | |
276 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; | |
277 | kvm_run->hw.hardware_exit_reason = 3; | |
278 | return 0; | |
279 | } | |
280 | ||
281 | } | |
282 | ||
283 | /* | |
284 | * offset: address offset to IPI space. | |
285 | * value: deliver value. | |
286 | */ | |
287 | static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm, | |
288 | uint64_t vector) | |
289 | { | |
290 | switch (dm) { | |
291 | case SAPIC_FIXED: | |
292 | kvm_apic_set_irq(vcpu, vector, 0); | |
293 | break; | |
294 | case SAPIC_NMI: | |
295 | kvm_apic_set_irq(vcpu, 2, 0); | |
296 | break; | |
297 | case SAPIC_EXTINT: | |
298 | kvm_apic_set_irq(vcpu, 0, 0); | |
299 | break; | |
300 | case SAPIC_INIT: | |
301 | case SAPIC_PMI: | |
302 | default: | |
303 | printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n"); | |
304 | break; | |
305 | } | |
306 | } | |
307 | ||
308 | static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id, | |
309 | unsigned long eid) | |
310 | { | |
311 | union ia64_lid lid; | |
312 | int i; | |
313 | ||
314 | for (i = 0; i < KVM_MAX_VCPUS; i++) { | |
315 | if (kvm->vcpus[i]) { | |
316 | lid.val = VCPU_LID(kvm->vcpus[i]); | |
317 | if (lid.id == id && lid.eid == eid) | |
318 | return kvm->vcpus[i]; | |
319 | } | |
320 | } | |
321 | ||
322 | return NULL; | |
323 | } | |
324 | ||
325 | static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
326 | { | |
327 | struct exit_ctl_data *p = kvm_get_exit_data(vcpu); | |
328 | struct kvm_vcpu *target_vcpu; | |
329 | struct kvm_pt_regs *regs; | |
330 | union ia64_ipi_a addr = p->u.ipi_data.addr; | |
331 | union ia64_ipi_d data = p->u.ipi_data.data; | |
332 | ||
333 | target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid); | |
334 | if (!target_vcpu) | |
335 | return handle_vm_error(vcpu, kvm_run); | |
336 | ||
337 | if (!target_vcpu->arch.launched) { | |
338 | regs = vcpu_regs(target_vcpu); | |
339 | ||
340 | regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip; | |
341 | regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp; | |
342 | ||
a4535290 | 343 | target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
b024b793 XZ |
344 | if (waitqueue_active(&target_vcpu->wq)) |
345 | wake_up_interruptible(&target_vcpu->wq); | |
346 | } else { | |
347 | vcpu_deliver_ipi(target_vcpu, data.dm, data.vector); | |
348 | if (target_vcpu != vcpu) | |
349 | kvm_vcpu_kick(target_vcpu); | |
350 | } | |
351 | ||
352 | return 1; | |
353 | } | |
354 | ||
355 | struct call_data { | |
356 | struct kvm_ptc_g ptc_g_data; | |
357 | struct kvm_vcpu *vcpu; | |
358 | }; | |
359 | ||
360 | static void vcpu_global_purge(void *info) | |
361 | { | |
362 | struct call_data *p = (struct call_data *)info; | |
363 | struct kvm_vcpu *vcpu = p->vcpu; | |
364 | ||
365 | if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) | |
366 | return; | |
367 | ||
368 | set_bit(KVM_REQ_PTC_G, &vcpu->requests); | |
369 | if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) { | |
370 | vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] = | |
371 | p->ptc_g_data; | |
372 | } else { | |
373 | clear_bit(KVM_REQ_PTC_G, &vcpu->requests); | |
374 | vcpu->arch.ptc_g_count = 0; | |
375 | set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests); | |
376 | } | |
377 | } | |
378 | ||
379 | static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
380 | { | |
381 | struct exit_ctl_data *p = kvm_get_exit_data(vcpu); | |
382 | struct kvm *kvm = vcpu->kvm; | |
383 | struct call_data call_data; | |
384 | int i; | |
385 | call_data.ptc_g_data = p->u.ptc_g_data; | |
386 | ||
387 | for (i = 0; i < KVM_MAX_VCPUS; i++) { | |
388 | if (!kvm->vcpus[i] || kvm->vcpus[i]->arch.mp_state == | |
a4535290 | 389 | KVM_MP_STATE_UNINITIALIZED || |
b024b793 XZ |
390 | vcpu == kvm->vcpus[i]) |
391 | continue; | |
392 | ||
393 | if (waitqueue_active(&kvm->vcpus[i]->wq)) | |
394 | wake_up_interruptible(&kvm->vcpus[i]->wq); | |
395 | ||
396 | if (kvm->vcpus[i]->cpu != -1) { | |
397 | call_data.vcpu = kvm->vcpus[i]; | |
398 | smp_call_function_single(kvm->vcpus[i]->cpu, | |
399 | vcpu_global_purge, &call_data, 0, 1); | |
400 | } else | |
401 | printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n"); | |
402 | ||
403 | } | |
404 | return 1; | |
405 | } | |
406 | ||
407 | static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
408 | { | |
409 | return 1; | |
410 | } | |
411 | ||
412 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
413 | { | |
414 | ||
415 | ktime_t kt; | |
416 | long itc_diff; | |
417 | unsigned long vcpu_now_itc; | |
418 | ||
419 | unsigned long expires; | |
420 | struct hrtimer *p_ht = &vcpu->arch.hlt_timer; | |
421 | unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec; | |
422 | struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd); | |
423 | ||
424 | vcpu_now_itc = ia64_getreg(_IA64_REG_AR_ITC) + vcpu->arch.itc_offset; | |
425 | ||
426 | if (time_after(vcpu_now_itc, vpd->itm)) { | |
427 | vcpu->arch.timer_check = 1; | |
428 | return 1; | |
429 | } | |
430 | itc_diff = vpd->itm - vcpu_now_itc; | |
431 | if (itc_diff < 0) | |
432 | itc_diff = -itc_diff; | |
433 | ||
434 | expires = div64_64(itc_diff, cyc_per_usec); | |
435 | kt = ktime_set(0, 1000 * expires); | |
436 | vcpu->arch.ht_active = 1; | |
437 | hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS); | |
438 | ||
439 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 440 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
b024b793 XZ |
441 | kvm_vcpu_block(vcpu); |
442 | hrtimer_cancel(p_ht); | |
443 | vcpu->arch.ht_active = 0; | |
444 | ||
a4535290 | 445 | if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE) |
b024b793 XZ |
446 | return -EINTR; |
447 | return 1; | |
448 | } else { | |
449 | printk(KERN_ERR"kvm: Unsupported userspace halt!"); | |
450 | return 0; | |
451 | } | |
452 | } | |
453 | ||
454 | static int handle_vm_shutdown(struct kvm_vcpu *vcpu, | |
455 | struct kvm_run *kvm_run) | |
456 | { | |
457 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
458 | return 0; | |
459 | } | |
460 | ||
461 | static int handle_external_interrupt(struct kvm_vcpu *vcpu, | |
462 | struct kvm_run *kvm_run) | |
463 | { | |
464 | return 1; | |
465 | } | |
466 | ||
467 | static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu, | |
468 | struct kvm_run *kvm_run) = { | |
469 | [EXIT_REASON_VM_PANIC] = handle_vm_error, | |
470 | [EXIT_REASON_MMIO_INSTRUCTION] = handle_mmio, | |
471 | [EXIT_REASON_PAL_CALL] = handle_pal_call, | |
472 | [EXIT_REASON_SAL_CALL] = handle_sal_call, | |
473 | [EXIT_REASON_SWITCH_RR6] = handle_switch_rr6, | |
474 | [EXIT_REASON_VM_DESTROY] = handle_vm_shutdown, | |
475 | [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt, | |
476 | [EXIT_REASON_IPI] = handle_ipi, | |
477 | [EXIT_REASON_PTC_G] = handle_global_purge, | |
478 | ||
479 | }; | |
480 | ||
481 | static const int kvm_vti_max_exit_handlers = | |
482 | sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers); | |
483 | ||
484 | static void kvm_prepare_guest_switch(struct kvm_vcpu *vcpu) | |
485 | { | |
486 | } | |
487 | ||
488 | static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu) | |
489 | { | |
490 | struct exit_ctl_data *p_exit_data; | |
491 | ||
492 | p_exit_data = kvm_get_exit_data(vcpu); | |
493 | return p_exit_data->exit_reason; | |
494 | } | |
495 | ||
496 | /* | |
497 | * The guest has exited. See if we can fix it or if we need userspace | |
498 | * assistance. | |
499 | */ | |
500 | static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) | |
501 | { | |
502 | u32 exit_reason = kvm_get_exit_reason(vcpu); | |
503 | vcpu->arch.last_exit = exit_reason; | |
504 | ||
505 | if (exit_reason < kvm_vti_max_exit_handlers | |
506 | && kvm_vti_exit_handlers[exit_reason]) | |
507 | return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run); | |
508 | else { | |
509 | kvm_run->exit_reason = KVM_EXIT_UNKNOWN; | |
510 | kvm_run->hw.hardware_exit_reason = exit_reason; | |
511 | } | |
512 | return 0; | |
513 | } | |
514 | ||
515 | static inline void vti_set_rr6(unsigned long rr6) | |
516 | { | |
517 | ia64_set_rr(RR6, rr6); | |
518 | ia64_srlz_i(); | |
519 | } | |
520 | ||
521 | static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu) | |
522 | { | |
523 | unsigned long pte; | |
524 | struct kvm *kvm = vcpu->kvm; | |
525 | int r; | |
526 | ||
527 | /*Insert a pair of tr to map vmm*/ | |
528 | pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL)); | |
529 | r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT); | |
530 | if (r < 0) | |
531 | goto out; | |
532 | vcpu->arch.vmm_tr_slot = r; | |
533 | /*Insert a pairt of tr to map data of vm*/ | |
534 | pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL)); | |
535 | r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE, | |
536 | pte, KVM_VM_DATA_SHIFT); | |
537 | if (r < 0) | |
538 | goto out; | |
539 | vcpu->arch.vm_tr_slot = r; | |
540 | r = 0; | |
541 | out: | |
542 | return r; | |
543 | ||
544 | } | |
545 | ||
546 | static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu) | |
547 | { | |
548 | ||
549 | ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot); | |
550 | ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot); | |
551 | ||
552 | } | |
553 | ||
554 | static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu) | |
555 | { | |
556 | int cpu = smp_processor_id(); | |
557 | ||
558 | if (vcpu->arch.last_run_cpu != cpu || | |
559 | per_cpu(last_vcpu, cpu) != vcpu) { | |
560 | per_cpu(last_vcpu, cpu) = vcpu; | |
561 | vcpu->arch.last_run_cpu = cpu; | |
562 | kvm_flush_tlb_all(); | |
563 | } | |
564 | ||
565 | vcpu->arch.host_rr6 = ia64_get_rr(RR6); | |
566 | vti_set_rr6(vcpu->arch.vmm_rr); | |
567 | return kvm_insert_vmm_mapping(vcpu); | |
568 | } | |
569 | static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu) | |
570 | { | |
571 | kvm_purge_vmm_mapping(vcpu); | |
572 | vti_set_rr6(vcpu->arch.host_rr6); | |
573 | } | |
574 | ||
575 | static int vti_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
576 | { | |
577 | union context *host_ctx, *guest_ctx; | |
578 | int r; | |
579 | ||
580 | /*Get host and guest context with guest address space.*/ | |
581 | host_ctx = kvm_get_host_context(vcpu); | |
582 | guest_ctx = kvm_get_guest_context(vcpu); | |
583 | ||
584 | r = kvm_vcpu_pre_transition(vcpu); | |
585 | if (r < 0) | |
586 | goto out; | |
587 | kvm_vmm_info->tramp_entry(host_ctx, guest_ctx); | |
588 | kvm_vcpu_post_transition(vcpu); | |
589 | r = 0; | |
590 | out: | |
591 | return r; | |
592 | } | |
593 | ||
594 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
595 | { | |
596 | int r; | |
597 | ||
598 | again: | |
599 | preempt_disable(); | |
600 | ||
601 | kvm_prepare_guest_switch(vcpu); | |
602 | local_irq_disable(); | |
603 | ||
604 | if (signal_pending(current)) { | |
605 | local_irq_enable(); | |
606 | preempt_enable(); | |
607 | r = -EINTR; | |
608 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
609 | goto out; | |
610 | } | |
611 | ||
612 | vcpu->guest_mode = 1; | |
613 | kvm_guest_enter(); | |
614 | ||
615 | r = vti_vcpu_run(vcpu, kvm_run); | |
616 | if (r < 0) { | |
617 | local_irq_enable(); | |
618 | preempt_enable(); | |
619 | kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY; | |
620 | goto out; | |
621 | } | |
622 | ||
623 | vcpu->arch.launched = 1; | |
624 | vcpu->guest_mode = 0; | |
625 | local_irq_enable(); | |
626 | ||
627 | /* | |
628 | * We must have an instruction between local_irq_enable() and | |
629 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
630 | * the interrupt shadow. The stat.exits increment will do nicely. | |
631 | * But we need to prevent reordering, hence this barrier(): | |
632 | */ | |
633 | barrier(); | |
634 | ||
635 | kvm_guest_exit(); | |
636 | ||
637 | preempt_enable(); | |
638 | ||
639 | r = kvm_handle_exit(kvm_run, vcpu); | |
640 | ||
641 | if (r > 0) { | |
642 | if (!need_resched()) | |
643 | goto again; | |
644 | } | |
645 | ||
646 | out: | |
647 | if (r > 0) { | |
648 | kvm_resched(vcpu); | |
649 | goto again; | |
650 | } | |
651 | ||
652 | return r; | |
653 | } | |
654 | ||
655 | static void kvm_set_mmio_data(struct kvm_vcpu *vcpu) | |
656 | { | |
657 | struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu); | |
658 | ||
659 | if (!vcpu->mmio_is_write) | |
660 | memcpy(&p->data, vcpu->mmio_data, 8); | |
661 | p->state = STATE_IORESP_READY; | |
662 | } | |
663 | ||
664 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
665 | { | |
666 | int r; | |
667 | sigset_t sigsaved; | |
668 | ||
669 | vcpu_load(vcpu); | |
670 | ||
a4535290 | 671 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b024b793 XZ |
672 | kvm_vcpu_block(vcpu); |
673 | vcpu_put(vcpu); | |
674 | return -EAGAIN; | |
675 | } | |
676 | ||
677 | if (vcpu->sigset_active) | |
678 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
679 | ||
680 | if (vcpu->mmio_needed) { | |
681 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
682 | kvm_set_mmio_data(vcpu); | |
683 | vcpu->mmio_read_completed = 1; | |
684 | vcpu->mmio_needed = 0; | |
685 | } | |
686 | r = __vcpu_run(vcpu, kvm_run); | |
687 | ||
688 | if (vcpu->sigset_active) | |
689 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
690 | ||
691 | vcpu_put(vcpu); | |
692 | return r; | |
693 | } | |
694 | ||
695 | /* | |
696 | * Allocate 16M memory for every vm to hold its specific data. | |
697 | * Its memory map is defined in kvm_host.h. | |
698 | */ | |
699 | static struct kvm *kvm_alloc_kvm(void) | |
700 | { | |
701 | ||
702 | struct kvm *kvm; | |
703 | uint64_t vm_base; | |
704 | ||
705 | vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE)); | |
706 | ||
707 | if (!vm_base) | |
708 | return ERR_PTR(-ENOMEM); | |
709 | printk(KERN_DEBUG"kvm: VM data's base Address:0x%lx\n", vm_base); | |
710 | ||
711 | /* Zero all pages before use! */ | |
712 | memset((void *)vm_base, 0, KVM_VM_DATA_SIZE); | |
713 | ||
714 | kvm = (struct kvm *)(vm_base + KVM_VM_OFS); | |
715 | kvm->arch.vm_base = vm_base; | |
716 | ||
717 | return kvm; | |
718 | } | |
719 | ||
720 | struct kvm_io_range { | |
721 | unsigned long start; | |
722 | unsigned long size; | |
723 | unsigned long type; | |
724 | }; | |
725 | ||
726 | static const struct kvm_io_range io_ranges[] = { | |
727 | {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER}, | |
728 | {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO}, | |
729 | {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO}, | |
730 | {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC}, | |
731 | {PIB_START, PIB_SIZE, GPFN_PIB}, | |
732 | }; | |
733 | ||
734 | static void kvm_build_io_pmt(struct kvm *kvm) | |
735 | { | |
736 | unsigned long i, j; | |
737 | ||
738 | /* Mark I/O ranges */ | |
739 | for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range)); | |
740 | i++) { | |
741 | for (j = io_ranges[i].start; | |
742 | j < io_ranges[i].start + io_ranges[i].size; | |
743 | j += PAGE_SIZE) | |
744 | kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT, | |
745 | io_ranges[i].type, 0); | |
746 | } | |
747 | ||
748 | } | |
749 | ||
750 | /*Use unused rids to virtualize guest rid.*/ | |
751 | #define GUEST_PHYSICAL_RR0 0x1739 | |
752 | #define GUEST_PHYSICAL_RR4 0x2739 | |
753 | #define VMM_INIT_RR 0x1660 | |
754 | ||
755 | static void kvm_init_vm(struct kvm *kvm) | |
756 | { | |
757 | long vm_base; | |
758 | ||
759 | BUG_ON(!kvm); | |
760 | ||
761 | kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0; | |
762 | kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4; | |
763 | kvm->arch.vmm_init_rr = VMM_INIT_RR; | |
764 | ||
765 | vm_base = kvm->arch.vm_base; | |
766 | if (vm_base) { | |
767 | kvm->arch.vhpt_base = vm_base + KVM_VHPT_OFS; | |
768 | kvm->arch.vtlb_base = vm_base + KVM_VTLB_OFS; | |
769 | kvm->arch.vpd_base = vm_base + KVM_VPD_OFS; | |
770 | } | |
771 | ||
772 | /* | |
773 | *Fill P2M entries for MMIO/IO ranges | |
774 | */ | |
775 | kvm_build_io_pmt(kvm); | |
776 | ||
777 | } | |
778 | ||
779 | struct kvm *kvm_arch_create_vm(void) | |
780 | { | |
781 | struct kvm *kvm = kvm_alloc_kvm(); | |
782 | ||
783 | if (IS_ERR(kvm)) | |
784 | return ERR_PTR(-ENOMEM); | |
785 | kvm_init_vm(kvm); | |
786 | ||
787 | return kvm; | |
788 | ||
789 | } | |
790 | ||
791 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, | |
792 | struct kvm_irqchip *chip) | |
793 | { | |
794 | int r; | |
795 | ||
796 | r = 0; | |
797 | switch (chip->chip_id) { | |
798 | case KVM_IRQCHIP_IOAPIC: | |
799 | memcpy(&chip->chip.ioapic, ioapic_irqchip(kvm), | |
800 | sizeof(struct kvm_ioapic_state)); | |
801 | break; | |
802 | default: | |
803 | r = -EINVAL; | |
804 | break; | |
805 | } | |
806 | return r; | |
807 | } | |
808 | ||
809 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
810 | { | |
811 | int r; | |
812 | ||
813 | r = 0; | |
814 | switch (chip->chip_id) { | |
815 | case KVM_IRQCHIP_IOAPIC: | |
816 | memcpy(ioapic_irqchip(kvm), | |
817 | &chip->chip.ioapic, | |
818 | sizeof(struct kvm_ioapic_state)); | |
819 | break; | |
820 | default: | |
821 | r = -EINVAL; | |
822 | break; | |
823 | } | |
824 | return r; | |
825 | } | |
826 | ||
827 | #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x | |
828 | ||
829 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
830 | { | |
831 | int i; | |
832 | struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd); | |
833 | int r; | |
834 | ||
835 | vcpu_load(vcpu); | |
836 | ||
837 | for (i = 0; i < 16; i++) { | |
838 | vpd->vgr[i] = regs->vpd.vgr[i]; | |
839 | vpd->vbgr[i] = regs->vpd.vbgr[i]; | |
840 | } | |
841 | for (i = 0; i < 128; i++) | |
842 | vpd->vcr[i] = regs->vpd.vcr[i]; | |
843 | vpd->vhpi = regs->vpd.vhpi; | |
844 | vpd->vnat = regs->vpd.vnat; | |
845 | vpd->vbnat = regs->vpd.vbnat; | |
846 | vpd->vpsr = regs->vpd.vpsr; | |
847 | ||
848 | vpd->vpr = regs->vpd.vpr; | |
849 | ||
850 | r = -EFAULT; | |
851 | r = copy_from_user(&vcpu->arch.guest, regs->saved_guest, | |
852 | sizeof(union context)); | |
853 | if (r) | |
854 | goto out; | |
855 | r = copy_from_user(vcpu + 1, regs->saved_stack + | |
856 | sizeof(struct kvm_vcpu), | |
857 | IA64_STK_OFFSET - sizeof(struct kvm_vcpu)); | |
858 | if (r) | |
859 | goto out; | |
860 | vcpu->arch.exit_data = | |
861 | ((struct kvm_vcpu *)(regs->saved_stack))->arch.exit_data; | |
862 | ||
863 | RESTORE_REGS(mp_state); | |
864 | RESTORE_REGS(vmm_rr); | |
865 | memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS); | |
866 | memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS); | |
867 | RESTORE_REGS(itr_regions); | |
868 | RESTORE_REGS(dtr_regions); | |
869 | RESTORE_REGS(tc_regions); | |
870 | RESTORE_REGS(irq_check); | |
871 | RESTORE_REGS(itc_check); | |
872 | RESTORE_REGS(timer_check); | |
873 | RESTORE_REGS(timer_pending); | |
874 | RESTORE_REGS(last_itc); | |
875 | for (i = 0; i < 8; i++) { | |
876 | vcpu->arch.vrr[i] = regs->vrr[i]; | |
877 | vcpu->arch.ibr[i] = regs->ibr[i]; | |
878 | vcpu->arch.dbr[i] = regs->dbr[i]; | |
879 | } | |
880 | for (i = 0; i < 4; i++) | |
881 | vcpu->arch.insvc[i] = regs->insvc[i]; | |
882 | RESTORE_REGS(xtp); | |
883 | RESTORE_REGS(metaphysical_rr0); | |
884 | RESTORE_REGS(metaphysical_rr4); | |
885 | RESTORE_REGS(metaphysical_saved_rr0); | |
886 | RESTORE_REGS(metaphysical_saved_rr4); | |
887 | RESTORE_REGS(fp_psr); | |
888 | RESTORE_REGS(saved_gp); | |
889 | ||
890 | vcpu->arch.irq_new_pending = 1; | |
891 | vcpu->arch.itc_offset = regs->saved_itc - ia64_getreg(_IA64_REG_AR_ITC); | |
892 | set_bit(KVM_REQ_RESUME, &vcpu->requests); | |
893 | ||
894 | vcpu_put(vcpu); | |
895 | r = 0; | |
896 | out: | |
897 | return r; | |
898 | } | |
899 | ||
900 | long kvm_arch_vm_ioctl(struct file *filp, | |
901 | unsigned int ioctl, unsigned long arg) | |
902 | { | |
903 | struct kvm *kvm = filp->private_data; | |
904 | void __user *argp = (void __user *)arg; | |
905 | int r = -EINVAL; | |
906 | ||
907 | switch (ioctl) { | |
908 | case KVM_SET_MEMORY_REGION: { | |
909 | struct kvm_memory_region kvm_mem; | |
910 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
911 | ||
912 | r = -EFAULT; | |
913 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
914 | goto out; | |
915 | kvm_userspace_mem.slot = kvm_mem.slot; | |
916 | kvm_userspace_mem.flags = kvm_mem.flags; | |
917 | kvm_userspace_mem.guest_phys_addr = | |
918 | kvm_mem.guest_phys_addr; | |
919 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
920 | r = kvm_vm_ioctl_set_memory_region(kvm, | |
921 | &kvm_userspace_mem, 0); | |
922 | if (r) | |
923 | goto out; | |
924 | break; | |
925 | } | |
926 | case KVM_CREATE_IRQCHIP: | |
927 | r = -EFAULT; | |
928 | r = kvm_ioapic_init(kvm); | |
929 | if (r) | |
930 | goto out; | |
931 | break; | |
932 | case KVM_IRQ_LINE: { | |
933 | struct kvm_irq_level irq_event; | |
934 | ||
935 | r = -EFAULT; | |
936 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
937 | goto out; | |
938 | if (irqchip_in_kernel(kvm)) { | |
939 | mutex_lock(&kvm->lock); | |
940 | kvm_ioapic_set_irq(kvm->arch.vioapic, | |
941 | irq_event.irq, | |
942 | irq_event.level); | |
943 | mutex_unlock(&kvm->lock); | |
944 | r = 0; | |
945 | } | |
946 | break; | |
947 | } | |
948 | case KVM_GET_IRQCHIP: { | |
949 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
950 | struct kvm_irqchip chip; | |
951 | ||
952 | r = -EFAULT; | |
953 | if (copy_from_user(&chip, argp, sizeof chip)) | |
954 | goto out; | |
955 | r = -ENXIO; | |
956 | if (!irqchip_in_kernel(kvm)) | |
957 | goto out; | |
958 | r = kvm_vm_ioctl_get_irqchip(kvm, &chip); | |
959 | if (r) | |
960 | goto out; | |
961 | r = -EFAULT; | |
962 | if (copy_to_user(argp, &chip, sizeof chip)) | |
963 | goto out; | |
964 | r = 0; | |
965 | break; | |
966 | } | |
967 | case KVM_SET_IRQCHIP: { | |
968 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
969 | struct kvm_irqchip chip; | |
970 | ||
971 | r = -EFAULT; | |
972 | if (copy_from_user(&chip, argp, sizeof chip)) | |
973 | goto out; | |
974 | r = -ENXIO; | |
975 | if (!irqchip_in_kernel(kvm)) | |
976 | goto out; | |
977 | r = kvm_vm_ioctl_set_irqchip(kvm, &chip); | |
978 | if (r) | |
979 | goto out; | |
980 | r = 0; | |
981 | break; | |
982 | } | |
983 | default: | |
984 | ; | |
985 | } | |
986 | out: | |
987 | return r; | |
988 | } | |
989 | ||
990 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
991 | struct kvm_sregs *sregs) | |
992 | { | |
993 | return -EINVAL; | |
994 | } | |
995 | ||
996 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
997 | struct kvm_sregs *sregs) | |
998 | { | |
999 | return -EINVAL; | |
1000 | ||
1001 | } | |
1002 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
1003 | struct kvm_translation *tr) | |
1004 | { | |
1005 | ||
1006 | return -EINVAL; | |
1007 | } | |
1008 | ||
1009 | static int kvm_alloc_vmm_area(void) | |
1010 | { | |
1011 | if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) { | |
1012 | kvm_vmm_base = __get_free_pages(GFP_KERNEL, | |
1013 | get_order(KVM_VMM_SIZE)); | |
1014 | if (!kvm_vmm_base) | |
1015 | return -ENOMEM; | |
1016 | ||
1017 | memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE); | |
1018 | kvm_vm_buffer = kvm_vmm_base + VMM_SIZE; | |
1019 | ||
1020 | printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n", | |
1021 | kvm_vmm_base, kvm_vm_buffer); | |
1022 | } | |
1023 | ||
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | static void kvm_free_vmm_area(void) | |
1028 | { | |
1029 | if (kvm_vmm_base) { | |
1030 | /*Zero this area before free to avoid bits leak!!*/ | |
1031 | memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE); | |
1032 | free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE)); | |
1033 | kvm_vmm_base = 0; | |
1034 | kvm_vm_buffer = 0; | |
1035 | kvm_vsa_base = 0; | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
1041 | * cached on it. Leave it as blank for IA64. | |
1042 | */ | |
1043 | void decache_vcpus_on_cpu(int cpu) | |
1044 | { | |
1045 | } | |
1046 | ||
1047 | static void vti_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
1048 | { | |
1049 | } | |
1050 | ||
1051 | static int vti_init_vpd(struct kvm_vcpu *vcpu) | |
1052 | { | |
1053 | int i; | |
1054 | union cpuid3_t cpuid3; | |
1055 | struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd); | |
1056 | ||
1057 | if (IS_ERR(vpd)) | |
1058 | return PTR_ERR(vpd); | |
1059 | ||
1060 | /* CPUID init */ | |
1061 | for (i = 0; i < 5; i++) | |
1062 | vpd->vcpuid[i] = ia64_get_cpuid(i); | |
1063 | ||
1064 | /* Limit the CPUID number to 5 */ | |
1065 | cpuid3.value = vpd->vcpuid[3]; | |
1066 | cpuid3.number = 4; /* 5 - 1 */ | |
1067 | vpd->vcpuid[3] = cpuid3.value; | |
1068 | ||
1069 | /*Set vac and vdc fields*/ | |
1070 | vpd->vac.a_from_int_cr = 1; | |
1071 | vpd->vac.a_to_int_cr = 1; | |
1072 | vpd->vac.a_from_psr = 1; | |
1073 | vpd->vac.a_from_cpuid = 1; | |
1074 | vpd->vac.a_cover = 1; | |
1075 | vpd->vac.a_bsw = 1; | |
1076 | vpd->vac.a_int = 1; | |
1077 | vpd->vdc.d_vmsw = 1; | |
1078 | ||
1079 | /*Set virtual buffer*/ | |
1080 | vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE; | |
1081 | ||
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | static int vti_create_vp(struct kvm_vcpu *vcpu) | |
1086 | { | |
1087 | long ret; | |
1088 | struct vpd *vpd = vcpu->arch.vpd; | |
1089 | unsigned long vmm_ivt; | |
1090 | ||
1091 | vmm_ivt = kvm_vmm_info->vmm_ivt; | |
1092 | ||
1093 | printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt); | |
1094 | ||
1095 | ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0); | |
1096 | ||
1097 | if (ret) { | |
1098 | printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n"); | |
1099 | return -EINVAL; | |
1100 | } | |
1101 | return 0; | |
1102 | } | |
1103 | ||
1104 | static void init_ptce_info(struct kvm_vcpu *vcpu) | |
1105 | { | |
1106 | ia64_ptce_info_t ptce = {0}; | |
1107 | ||
1108 | ia64_get_ptce(&ptce); | |
1109 | vcpu->arch.ptce_base = ptce.base; | |
1110 | vcpu->arch.ptce_count[0] = ptce.count[0]; | |
1111 | vcpu->arch.ptce_count[1] = ptce.count[1]; | |
1112 | vcpu->arch.ptce_stride[0] = ptce.stride[0]; | |
1113 | vcpu->arch.ptce_stride[1] = ptce.stride[1]; | |
1114 | } | |
1115 | ||
1116 | static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu) | |
1117 | { | |
1118 | struct hrtimer *p_ht = &vcpu->arch.hlt_timer; | |
1119 | ||
1120 | if (hrtimer_cancel(p_ht)) | |
1121 | hrtimer_start(p_ht, p_ht->expires, HRTIMER_MODE_ABS); | |
1122 | } | |
1123 | ||
1124 | static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data) | |
1125 | { | |
1126 | struct kvm_vcpu *vcpu; | |
1127 | wait_queue_head_t *q; | |
1128 | ||
1129 | vcpu = container_of(data, struct kvm_vcpu, arch.hlt_timer); | |
a4535290 | 1130 | if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED) |
b024b793 XZ |
1131 | goto out; |
1132 | ||
1133 | q = &vcpu->wq; | |
1134 | if (waitqueue_active(q)) { | |
a4535290 | 1135 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
b024b793 XZ |
1136 | wake_up_interruptible(q); |
1137 | } | |
1138 | out: | |
1139 | vcpu->arch.timer_check = 1; | |
1140 | return HRTIMER_NORESTART; | |
1141 | } | |
1142 | ||
1143 | #define PALE_RESET_ENTRY 0x80000000ffffffb0UL | |
1144 | ||
1145 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
1146 | { | |
1147 | struct kvm_vcpu *v; | |
1148 | int r; | |
1149 | int i; | |
1150 | long itc_offset; | |
1151 | struct kvm *kvm = vcpu->kvm; | |
1152 | struct kvm_pt_regs *regs = vcpu_regs(vcpu); | |
1153 | ||
1154 | union context *p_ctx = &vcpu->arch.guest; | |
1155 | struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu); | |
1156 | ||
1157 | /*Init vcpu context for first run.*/ | |
1158 | if (IS_ERR(vmm_vcpu)) | |
1159 | return PTR_ERR(vmm_vcpu); | |
1160 | ||
1161 | if (vcpu->vcpu_id == 0) { | |
a4535290 | 1162 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
b024b793 XZ |
1163 | |
1164 | /*Set entry address for first run.*/ | |
1165 | regs->cr_iip = PALE_RESET_ENTRY; | |
1166 | ||
1167 | /*Initilize itc offset for vcpus*/ | |
1168 | itc_offset = 0UL - ia64_getreg(_IA64_REG_AR_ITC); | |
1169 | for (i = 0; i < MAX_VCPU_NUM; i++) { | |
1170 | v = (struct kvm_vcpu *)((char *)vcpu + VCPU_SIZE * i); | |
1171 | v->arch.itc_offset = itc_offset; | |
1172 | v->arch.last_itc = 0; | |
1173 | } | |
1174 | } else | |
a4535290 | 1175 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
b024b793 XZ |
1176 | |
1177 | r = -ENOMEM; | |
1178 | vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL); | |
1179 | if (!vcpu->arch.apic) | |
1180 | goto out; | |
1181 | vcpu->arch.apic->vcpu = vcpu; | |
1182 | ||
1183 | p_ctx->gr[1] = 0; | |
1184 | p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + IA64_STK_OFFSET); | |
1185 | p_ctx->gr[13] = (unsigned long)vmm_vcpu; | |
1186 | p_ctx->psr = 0x1008522000UL; | |
1187 | p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/ | |
1188 | p_ctx->caller_unat = 0; | |
1189 | p_ctx->pr = 0x0; | |
1190 | p_ctx->ar[36] = 0x0; /*unat*/ | |
1191 | p_ctx->ar[19] = 0x0; /*rnat*/ | |
1192 | p_ctx->ar[18] = (unsigned long)vmm_vcpu + | |
1193 | ((sizeof(struct kvm_vcpu)+15) & ~15); | |
1194 | p_ctx->ar[64] = 0x0; /*pfs*/ | |
1195 | p_ctx->cr[0] = 0x7e04UL; | |
1196 | p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt; | |
1197 | p_ctx->cr[8] = 0x3c; | |
1198 | ||
1199 | /*Initilize region register*/ | |
1200 | p_ctx->rr[0] = 0x30; | |
1201 | p_ctx->rr[1] = 0x30; | |
1202 | p_ctx->rr[2] = 0x30; | |
1203 | p_ctx->rr[3] = 0x30; | |
1204 | p_ctx->rr[4] = 0x30; | |
1205 | p_ctx->rr[5] = 0x30; | |
1206 | p_ctx->rr[7] = 0x30; | |
1207 | ||
1208 | /*Initilize branch register 0*/ | |
1209 | p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry; | |
1210 | ||
1211 | vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr; | |
1212 | vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0; | |
1213 | vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4; | |
1214 | ||
1215 | hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS); | |
1216 | vcpu->arch.hlt_timer.function = hlt_timer_fn; | |
1217 | ||
1218 | vcpu->arch.last_run_cpu = -1; | |
1219 | vcpu->arch.vpd = (struct vpd *)VPD_ADDR(vcpu->vcpu_id); | |
1220 | vcpu->arch.vsa_base = kvm_vsa_base; | |
1221 | vcpu->arch.__gp = kvm_vmm_gp; | |
1222 | vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock); | |
1223 | vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_ADDR(vcpu->vcpu_id); | |
1224 | vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_ADDR(vcpu->vcpu_id); | |
1225 | init_ptce_info(vcpu); | |
1226 | ||
1227 | r = 0; | |
1228 | out: | |
1229 | return r; | |
1230 | } | |
1231 | ||
1232 | static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id) | |
1233 | { | |
1234 | unsigned long psr; | |
1235 | int r; | |
1236 | ||
1237 | local_irq_save(psr); | |
1238 | r = kvm_insert_vmm_mapping(vcpu); | |
1239 | if (r) | |
1240 | goto fail; | |
1241 | r = kvm_vcpu_init(vcpu, vcpu->kvm, id); | |
1242 | if (r) | |
1243 | goto fail; | |
1244 | ||
1245 | r = vti_init_vpd(vcpu); | |
1246 | if (r) { | |
1247 | printk(KERN_DEBUG"kvm: vpd init error!!\n"); | |
1248 | goto uninit; | |
1249 | } | |
1250 | ||
1251 | r = vti_create_vp(vcpu); | |
1252 | if (r) | |
1253 | goto uninit; | |
1254 | ||
1255 | kvm_purge_vmm_mapping(vcpu); | |
1256 | local_irq_restore(psr); | |
1257 | ||
1258 | return 0; | |
1259 | uninit: | |
1260 | kvm_vcpu_uninit(vcpu); | |
1261 | fail: | |
1262 | return r; | |
1263 | } | |
1264 | ||
1265 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
1266 | unsigned int id) | |
1267 | { | |
1268 | struct kvm_vcpu *vcpu; | |
1269 | unsigned long vm_base = kvm->arch.vm_base; | |
1270 | int r; | |
1271 | int cpu; | |
1272 | ||
1273 | r = -ENOMEM; | |
1274 | if (!vm_base) { | |
1275 | printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id); | |
1276 | goto fail; | |
1277 | } | |
1278 | vcpu = (struct kvm_vcpu *)(vm_base + KVM_VCPU_OFS + VCPU_SIZE * id); | |
1279 | vcpu->kvm = kvm; | |
1280 | ||
1281 | cpu = get_cpu(); | |
1282 | vti_vcpu_load(vcpu, cpu); | |
1283 | r = vti_vcpu_setup(vcpu, id); | |
1284 | put_cpu(); | |
1285 | ||
1286 | if (r) { | |
1287 | printk(KERN_DEBUG"kvm: vcpu_setup error!!\n"); | |
1288 | goto fail; | |
1289 | } | |
1290 | ||
1291 | return vcpu; | |
1292 | fail: | |
1293 | return ERR_PTR(r); | |
1294 | } | |
1295 | ||
1296 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) | |
1297 | { | |
1298 | return 0; | |
1299 | } | |
1300 | ||
1301 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1302 | { | |
1303 | return -EINVAL; | |
1304 | } | |
1305 | ||
1306 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
1307 | { | |
1308 | return -EINVAL; | |
1309 | } | |
1310 | ||
1311 | int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, | |
1312 | struct kvm_debug_guest *dbg) | |
1313 | { | |
1314 | return -EINVAL; | |
1315 | } | |
1316 | ||
1317 | static void free_kvm(struct kvm *kvm) | |
1318 | { | |
1319 | unsigned long vm_base = kvm->arch.vm_base; | |
1320 | ||
1321 | if (vm_base) { | |
1322 | memset((void *)vm_base, 0, KVM_VM_DATA_SIZE); | |
1323 | free_pages(vm_base, get_order(KVM_VM_DATA_SIZE)); | |
1324 | } | |
1325 | ||
1326 | } | |
1327 | ||
1328 | static void kvm_release_vm_pages(struct kvm *kvm) | |
1329 | { | |
1330 | struct kvm_memory_slot *memslot; | |
1331 | int i, j; | |
1332 | unsigned long base_gfn; | |
1333 | ||
1334 | for (i = 0; i < kvm->nmemslots; i++) { | |
1335 | memslot = &kvm->memslots[i]; | |
1336 | base_gfn = memslot->base_gfn; | |
1337 | ||
1338 | for (j = 0; j < memslot->npages; j++) { | |
1339 | if (memslot->rmap[j]) | |
1340 | put_page((struct page *)memslot->rmap[j]); | |
1341 | } | |
1342 | } | |
1343 | } | |
1344 | ||
1345 | void kvm_arch_destroy_vm(struct kvm *kvm) | |
1346 | { | |
1347 | kfree(kvm->arch.vioapic); | |
1348 | kvm_release_vm_pages(kvm); | |
1349 | kvm_free_physmem(kvm); | |
1350 | free_kvm(kvm); | |
1351 | } | |
1352 | ||
1353 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1354 | { | |
1355 | } | |
1356 | ||
1357 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
1358 | { | |
1359 | if (cpu != vcpu->cpu) { | |
1360 | vcpu->cpu = cpu; | |
1361 | if (vcpu->arch.ht_active) | |
1362 | kvm_migrate_hlt_timer(vcpu); | |
1363 | } | |
1364 | } | |
1365 | ||
1366 | #define SAVE_REGS(_x) regs->_x = vcpu->arch._x | |
1367 | ||
1368 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
1369 | { | |
1370 | int i; | |
1371 | int r; | |
1372 | struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd); | |
1373 | vcpu_load(vcpu); | |
1374 | ||
1375 | for (i = 0; i < 16; i++) { | |
1376 | regs->vpd.vgr[i] = vpd->vgr[i]; | |
1377 | regs->vpd.vbgr[i] = vpd->vbgr[i]; | |
1378 | } | |
1379 | for (i = 0; i < 128; i++) | |
1380 | regs->vpd.vcr[i] = vpd->vcr[i]; | |
1381 | regs->vpd.vhpi = vpd->vhpi; | |
1382 | regs->vpd.vnat = vpd->vnat; | |
1383 | regs->vpd.vbnat = vpd->vbnat; | |
1384 | regs->vpd.vpsr = vpd->vpsr; | |
1385 | regs->vpd.vpr = vpd->vpr; | |
1386 | ||
1387 | r = -EFAULT; | |
1388 | r = copy_to_user(regs->saved_guest, &vcpu->arch.guest, | |
1389 | sizeof(union context)); | |
1390 | if (r) | |
1391 | goto out; | |
1392 | r = copy_to_user(regs->saved_stack, (void *)vcpu, IA64_STK_OFFSET); | |
1393 | if (r) | |
1394 | goto out; | |
1395 | SAVE_REGS(mp_state); | |
1396 | SAVE_REGS(vmm_rr); | |
1397 | memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS); | |
1398 | memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS); | |
1399 | SAVE_REGS(itr_regions); | |
1400 | SAVE_REGS(dtr_regions); | |
1401 | SAVE_REGS(tc_regions); | |
1402 | SAVE_REGS(irq_check); | |
1403 | SAVE_REGS(itc_check); | |
1404 | SAVE_REGS(timer_check); | |
1405 | SAVE_REGS(timer_pending); | |
1406 | SAVE_REGS(last_itc); | |
1407 | for (i = 0; i < 8; i++) { | |
1408 | regs->vrr[i] = vcpu->arch.vrr[i]; | |
1409 | regs->ibr[i] = vcpu->arch.ibr[i]; | |
1410 | regs->dbr[i] = vcpu->arch.dbr[i]; | |
1411 | } | |
1412 | for (i = 0; i < 4; i++) | |
1413 | regs->insvc[i] = vcpu->arch.insvc[i]; | |
1414 | regs->saved_itc = vcpu->arch.itc_offset + ia64_getreg(_IA64_REG_AR_ITC); | |
1415 | SAVE_REGS(xtp); | |
1416 | SAVE_REGS(metaphysical_rr0); | |
1417 | SAVE_REGS(metaphysical_rr4); | |
1418 | SAVE_REGS(metaphysical_saved_rr0); | |
1419 | SAVE_REGS(metaphysical_saved_rr4); | |
1420 | SAVE_REGS(fp_psr); | |
1421 | SAVE_REGS(saved_gp); | |
1422 | vcpu_put(vcpu); | |
1423 | r = 0; | |
1424 | out: | |
1425 | return r; | |
1426 | } | |
1427 | ||
1428 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
1429 | { | |
1430 | ||
1431 | hrtimer_cancel(&vcpu->arch.hlt_timer); | |
1432 | kfree(vcpu->arch.apic); | |
1433 | } | |
1434 | ||
1435 | ||
1436 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
1437 | unsigned int ioctl, unsigned long arg) | |
1438 | { | |
1439 | return -EINVAL; | |
1440 | } | |
1441 | ||
1442 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
1443 | struct kvm_userspace_memory_region *mem, | |
1444 | struct kvm_memory_slot old, | |
1445 | int user_alloc) | |
1446 | { | |
1447 | unsigned long i; | |
1448 | struct page *page; | |
1449 | int npages = mem->memory_size >> PAGE_SHIFT; | |
1450 | struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; | |
1451 | unsigned long base_gfn = memslot->base_gfn; | |
1452 | ||
1453 | for (i = 0; i < npages; i++) { | |
1454 | page = gfn_to_page(kvm, base_gfn + i); | |
1455 | kvm_set_pmt_entry(kvm, base_gfn + i, | |
1456 | page_to_pfn(page) << PAGE_SHIFT, | |
1457 | _PAGE_AR_RWX|_PAGE_MA_WB); | |
1458 | memslot->rmap[i] = (unsigned long)page; | |
1459 | } | |
1460 | ||
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | ||
1465 | long kvm_arch_dev_ioctl(struct file *filp, | |
1466 | unsigned int ioctl, unsigned long arg) | |
1467 | { | |
1468 | return -EINVAL; | |
1469 | } | |
1470 | ||
1471 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
1472 | { | |
1473 | kvm_vcpu_uninit(vcpu); | |
1474 | } | |
1475 | ||
1476 | static int vti_cpu_has_kvm_support(void) | |
1477 | { | |
1478 | long avail = 1, status = 1, control = 1; | |
1479 | long ret; | |
1480 | ||
1481 | ret = ia64_pal_proc_get_features(&avail, &status, &control, 0); | |
1482 | if (ret) | |
1483 | goto out; | |
1484 | ||
1485 | if (!(avail & PAL_PROC_VM_BIT)) | |
1486 | goto out; | |
1487 | ||
1488 | printk(KERN_DEBUG"kvm: Hardware Supports VT\n"); | |
1489 | ||
1490 | ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info); | |
1491 | if (ret) | |
1492 | goto out; | |
1493 | printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size); | |
1494 | ||
1495 | if (!(vp_env_info & VP_OPCODE)) { | |
1496 | printk(KERN_WARNING"kvm: No opcode ability on hardware, " | |
1497 | "vm_env_info:0x%lx\n", vp_env_info); | |
1498 | } | |
1499 | ||
1500 | return 1; | |
1501 | out: | |
1502 | return 0; | |
1503 | } | |
1504 | ||
1505 | static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info, | |
1506 | struct module *module) | |
1507 | { | |
1508 | unsigned long module_base; | |
1509 | unsigned long vmm_size; | |
1510 | ||
1511 | unsigned long vmm_offset, func_offset, fdesc_offset; | |
1512 | struct fdesc *p_fdesc; | |
1513 | ||
1514 | BUG_ON(!module); | |
1515 | ||
1516 | if (!kvm_vmm_base) { | |
1517 | printk("kvm: kvm area hasn't been initilized yet!!\n"); | |
1518 | return -EFAULT; | |
1519 | } | |
1520 | ||
1521 | /*Calculate new position of relocated vmm module.*/ | |
1522 | module_base = (unsigned long)module->module_core; | |
1523 | vmm_size = module->core_size; | |
1524 | if (unlikely(vmm_size > KVM_VMM_SIZE)) | |
1525 | return -EFAULT; | |
1526 | ||
1527 | memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size); | |
1528 | kvm_flush_icache(kvm_vmm_base, vmm_size); | |
1529 | ||
1530 | /*Recalculate kvm_vmm_info based on new VMM*/ | |
1531 | vmm_offset = vmm_info->vmm_ivt - module_base; | |
1532 | kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset; | |
1533 | printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n", | |
1534 | kvm_vmm_info->vmm_ivt); | |
1535 | ||
1536 | fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base; | |
1537 | kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE + | |
1538 | fdesc_offset); | |
1539 | func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base; | |
1540 | p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset); | |
1541 | p_fdesc->ip = KVM_VMM_BASE + func_offset; | |
1542 | p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base); | |
1543 | ||
1544 | printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n", | |
1545 | KVM_VMM_BASE+func_offset); | |
1546 | ||
1547 | fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base; | |
1548 | kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE + | |
1549 | fdesc_offset); | |
1550 | func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base; | |
1551 | p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset); | |
1552 | p_fdesc->ip = KVM_VMM_BASE + func_offset; | |
1553 | p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base); | |
1554 | ||
1555 | kvm_vmm_gp = p_fdesc->gp; | |
1556 | ||
1557 | printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n", | |
1558 | kvm_vmm_info->vmm_entry); | |
1559 | printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n", | |
1560 | KVM_VMM_BASE + func_offset); | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | int kvm_arch_init(void *opaque) | |
1566 | { | |
1567 | int r; | |
1568 | struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque; | |
1569 | ||
1570 | if (!vti_cpu_has_kvm_support()) { | |
1571 | printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n"); | |
1572 | r = -EOPNOTSUPP; | |
1573 | goto out; | |
1574 | } | |
1575 | ||
1576 | if (kvm_vmm_info) { | |
1577 | printk(KERN_ERR "kvm: Already loaded VMM module!\n"); | |
1578 | r = -EEXIST; | |
1579 | goto out; | |
1580 | } | |
1581 | ||
1582 | r = -ENOMEM; | |
1583 | kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL); | |
1584 | if (!kvm_vmm_info) | |
1585 | goto out; | |
1586 | ||
1587 | if (kvm_alloc_vmm_area()) | |
1588 | goto out_free0; | |
1589 | ||
1590 | r = kvm_relocate_vmm(vmm_info, vmm_info->module); | |
1591 | if (r) | |
1592 | goto out_free1; | |
1593 | ||
1594 | return 0; | |
1595 | ||
1596 | out_free1: | |
1597 | kvm_free_vmm_area(); | |
1598 | out_free0: | |
1599 | kfree(kvm_vmm_info); | |
1600 | out: | |
1601 | return r; | |
1602 | } | |
1603 | ||
1604 | void kvm_arch_exit(void) | |
1605 | { | |
1606 | kvm_free_vmm_area(); | |
1607 | kfree(kvm_vmm_info); | |
1608 | kvm_vmm_info = NULL; | |
1609 | } | |
1610 | ||
1611 | static int kvm_ia64_sync_dirty_log(struct kvm *kvm, | |
1612 | struct kvm_dirty_log *log) | |
1613 | { | |
1614 | struct kvm_memory_slot *memslot; | |
1615 | int r, i; | |
1616 | long n, base; | |
1617 | unsigned long *dirty_bitmap = (unsigned long *)((void *)kvm - KVM_VM_OFS | |
1618 | + KVM_MEM_DIRTY_LOG_OFS); | |
1619 | ||
1620 | r = -EINVAL; | |
1621 | if (log->slot >= KVM_MEMORY_SLOTS) | |
1622 | goto out; | |
1623 | ||
1624 | memslot = &kvm->memslots[log->slot]; | |
1625 | r = -ENOENT; | |
1626 | if (!memslot->dirty_bitmap) | |
1627 | goto out; | |
1628 | ||
1629 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; | |
1630 | base = memslot->base_gfn / BITS_PER_LONG; | |
1631 | ||
1632 | for (i = 0; i < n/sizeof(long); ++i) { | |
1633 | memslot->dirty_bitmap[i] = dirty_bitmap[base + i]; | |
1634 | dirty_bitmap[base + i] = 0; | |
1635 | } | |
1636 | r = 0; | |
1637 | out: | |
1638 | return r; | |
1639 | } | |
1640 | ||
1641 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
1642 | struct kvm_dirty_log *log) | |
1643 | { | |
1644 | int r; | |
1645 | int n; | |
1646 | struct kvm_memory_slot *memslot; | |
1647 | int is_dirty = 0; | |
1648 | ||
1649 | spin_lock(&kvm->arch.dirty_log_lock); | |
1650 | ||
1651 | r = kvm_ia64_sync_dirty_log(kvm, log); | |
1652 | if (r) | |
1653 | goto out; | |
1654 | ||
1655 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
1656 | if (r) | |
1657 | goto out; | |
1658 | ||
1659 | /* If nothing is dirty, don't bother messing with page tables. */ | |
1660 | if (is_dirty) { | |
1661 | kvm_flush_remote_tlbs(kvm); | |
1662 | memslot = &kvm->memslots[log->slot]; | |
1663 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; | |
1664 | memset(memslot->dirty_bitmap, 0, n); | |
1665 | } | |
1666 | r = 0; | |
1667 | out: | |
1668 | spin_unlock(&kvm->arch.dirty_log_lock); | |
1669 | return r; | |
1670 | } | |
1671 | ||
1672 | int kvm_arch_hardware_setup(void) | |
1673 | { | |
1674 | return 0; | |
1675 | } | |
1676 | ||
1677 | void kvm_arch_hardware_unsetup(void) | |
1678 | { | |
1679 | } | |
1680 | ||
1681 | static void vcpu_kick_intr(void *info) | |
1682 | { | |
1683 | #ifdef DEBUG | |
1684 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info; | |
1685 | printk(KERN_DEBUG"vcpu_kick_intr %p \n", vcpu); | |
1686 | #endif | |
1687 | } | |
1688 | ||
1689 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) | |
1690 | { | |
1691 | int ipi_pcpu = vcpu->cpu; | |
1692 | ||
1693 | if (waitqueue_active(&vcpu->wq)) | |
1694 | wake_up_interruptible(&vcpu->wq); | |
1695 | ||
1696 | if (vcpu->guest_mode) | |
1697 | smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0, 0); | |
1698 | } | |
1699 | ||
1700 | int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 trig) | |
1701 | { | |
1702 | ||
1703 | struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd); | |
1704 | ||
1705 | if (!test_and_set_bit(vec, &vpd->irr[0])) { | |
1706 | vcpu->arch.irq_new_pending = 1; | |
a4535290 | 1707 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
b024b793 | 1708 | kvm_vcpu_kick(vcpu); |
a4535290 AK |
1709 | else if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED) { |
1710 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b024b793 XZ |
1711 | if (waitqueue_active(&vcpu->wq)) |
1712 | wake_up_interruptible(&vcpu->wq); | |
1713 | } | |
1714 | return 1; | |
1715 | } | |
1716 | return 0; | |
1717 | } | |
1718 | ||
1719 | int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest) | |
1720 | { | |
1721 | return apic->vcpu->vcpu_id == dest; | |
1722 | } | |
1723 | ||
1724 | int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda) | |
1725 | { | |
1726 | return 0; | |
1727 | } | |
1728 | ||
1729 | struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector, | |
1730 | unsigned long bitmap) | |
1731 | { | |
1732 | struct kvm_vcpu *lvcpu = kvm->vcpus[0]; | |
1733 | int i; | |
1734 | ||
1735 | for (i = 1; i < KVM_MAX_VCPUS; i++) { | |
1736 | if (!kvm->vcpus[i]) | |
1737 | continue; | |
1738 | if (lvcpu->arch.xtp > kvm->vcpus[i]->arch.xtp) | |
1739 | lvcpu = kvm->vcpus[i]; | |
1740 | } | |
1741 | ||
1742 | return lvcpu; | |
1743 | } | |
1744 | ||
1745 | static int find_highest_bits(int *dat) | |
1746 | { | |
1747 | u32 bits, bitnum; | |
1748 | int i; | |
1749 | ||
1750 | /* loop for all 256 bits */ | |
1751 | for (i = 7; i >= 0 ; i--) { | |
1752 | bits = dat[i]; | |
1753 | if (bits) { | |
1754 | bitnum = fls(bits); | |
1755 | return i * 32 + bitnum - 1; | |
1756 | } | |
1757 | } | |
1758 | ||
1759 | return -1; | |
1760 | } | |
1761 | ||
1762 | int kvm_highest_pending_irq(struct kvm_vcpu *vcpu) | |
1763 | { | |
1764 | struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd); | |
1765 | ||
1766 | if (vpd->irr[0] & (1UL << NMI_VECTOR)) | |
1767 | return NMI_VECTOR; | |
1768 | if (vpd->irr[0] & (1UL << ExtINT_VECTOR)) | |
1769 | return ExtINT_VECTOR; | |
1770 | ||
1771 | return find_highest_bits((int *)&vpd->irr[0]); | |
1772 | } | |
1773 | ||
1774 | int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu) | |
1775 | { | |
1776 | if (kvm_highest_pending_irq(vcpu) != -1) | |
1777 | return 1; | |
1778 | return 0; | |
1779 | } | |
1780 | ||
3d80840d MT |
1781 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
1782 | { | |
1783 | return 0; | |
1784 | } | |
1785 | ||
b024b793 XZ |
1786 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
1787 | { | |
1788 | return gfn; | |
1789 | } | |
1790 | ||
1791 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) | |
1792 | { | |
a4535290 | 1793 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE; |
b024b793 | 1794 | } |
62d9f0db MT |
1795 | |
1796 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, | |
1797 | struct kvm_mp_state *mp_state) | |
1798 | { | |
1799 | return -EINVAL; | |
1800 | } | |
1801 | ||
1802 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
1803 | struct kvm_mp_state *mp_state) | |
1804 | { | |
1805 | return -EINVAL; | |
1806 | } |