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de56a948 PM |
1 | /* |
2 | * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> | |
3 | * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved. | |
4 | * | |
5 | * Authors: | |
6 | * Paul Mackerras <paulus@au1.ibm.com> | |
7 | * Alexander Graf <agraf@suse.de> | |
8 | * Kevin Wolf <mail@kevin-wolf.de> | |
9 | * | |
10 | * Description: KVM functions specific to running on Book 3S | |
11 | * processors in hypervisor mode (specifically POWER7 and later). | |
12 | * | |
13 | * This file is derived from arch/powerpc/kvm/book3s.c, | |
14 | * by Alexander Graf <agraf@suse.de>. | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License, version 2, as | |
18 | * published by the Free Software Foundation. | |
19 | */ | |
20 | ||
21 | #include <linux/kvm_host.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/preempt.h> | |
25 | #include <linux/sched.h> | |
26 | #include <linux/delay.h> | |
66b15db6 | 27 | #include <linux/export.h> |
de56a948 PM |
28 | #include <linux/fs.h> |
29 | #include <linux/anon_inodes.h> | |
30 | #include <linux/cpumask.h> | |
aa04b4cc PM |
31 | #include <linux/spinlock.h> |
32 | #include <linux/page-flags.h> | |
de56a948 PM |
33 | |
34 | #include <asm/reg.h> | |
35 | #include <asm/cputable.h> | |
36 | #include <asm/cacheflush.h> | |
37 | #include <asm/tlbflush.h> | |
38 | #include <asm/uaccess.h> | |
39 | #include <asm/io.h> | |
40 | #include <asm/kvm_ppc.h> | |
41 | #include <asm/kvm_book3s.h> | |
42 | #include <asm/mmu_context.h> | |
43 | #include <asm/lppaca.h> | |
44 | #include <asm/processor.h> | |
371fefd6 | 45 | #include <asm/cputhreads.h> |
aa04b4cc | 46 | #include <asm/page.h> |
de1d9248 | 47 | #include <asm/hvcall.h> |
ae3a197e | 48 | #include <asm/switch_to.h> |
de56a948 | 49 | #include <linux/gfp.h> |
de56a948 PM |
50 | #include <linux/vmalloc.h> |
51 | #include <linux/highmem.h> | |
c77162de | 52 | #include <linux/hugetlb.h> |
de56a948 PM |
53 | |
54 | /* #define EXIT_DEBUG */ | |
55 | /* #define EXIT_DEBUG_SIMPLE */ | |
56 | /* #define EXIT_DEBUG_INT */ | |
57 | ||
19ccb76a | 58 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
c77162de | 59 | static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu); |
19ccb76a | 60 | |
de56a948 PM |
61 | void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
62 | { | |
63 | local_paca->kvm_hstate.kvm_vcpu = vcpu; | |
371fefd6 | 64 | local_paca->kvm_hstate.kvm_vcore = vcpu->arch.vcore; |
de56a948 PM |
65 | } |
66 | ||
67 | void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) | |
68 | { | |
69 | } | |
70 | ||
de56a948 PM |
71 | void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr) |
72 | { | |
73 | vcpu->arch.shregs.msr = msr; | |
19ccb76a | 74 | kvmppc_end_cede(vcpu); |
de56a948 PM |
75 | } |
76 | ||
77 | void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr) | |
78 | { | |
79 | vcpu->arch.pvr = pvr; | |
80 | } | |
81 | ||
82 | void kvmppc_dump_regs(struct kvm_vcpu *vcpu) | |
83 | { | |
84 | int r; | |
85 | ||
86 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); | |
87 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", | |
88 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); | |
89 | for (r = 0; r < 16; ++r) | |
90 | pr_err("r%2d = %.16lx r%d = %.16lx\n", | |
91 | r, kvmppc_get_gpr(vcpu, r), | |
92 | r+16, kvmppc_get_gpr(vcpu, r+16)); | |
93 | pr_err("ctr = %.16lx lr = %.16lx\n", | |
94 | vcpu->arch.ctr, vcpu->arch.lr); | |
95 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", | |
96 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); | |
97 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", | |
98 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); | |
99 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", | |
100 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); | |
101 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", | |
102 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); | |
103 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); | |
104 | pr_err("fault dar = %.16lx dsisr = %.8x\n", | |
105 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
106 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); | |
107 | for (r = 0; r < vcpu->arch.slb_max; ++r) | |
108 | pr_err(" ESID = %.16llx VSID = %.16llx\n", | |
109 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); | |
110 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", | |
aa04b4cc | 111 | vcpu->kvm->arch.lpcr, vcpu->kvm->arch.sdr1, |
de56a948 PM |
112 | vcpu->arch.last_inst); |
113 | } | |
114 | ||
a8606e20 PM |
115 | struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
116 | { | |
117 | int r; | |
118 | struct kvm_vcpu *v, *ret = NULL; | |
119 | ||
120 | mutex_lock(&kvm->lock); | |
121 | kvm_for_each_vcpu(r, v, kvm) { | |
122 | if (v->vcpu_id == id) { | |
123 | ret = v; | |
124 | break; | |
125 | } | |
126 | } | |
127 | mutex_unlock(&kvm->lock); | |
128 | return ret; | |
129 | } | |
130 | ||
131 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) | |
132 | { | |
133 | vpa->shared_proc = 1; | |
134 | vpa->yield_count = 1; | |
135 | } | |
136 | ||
2e25aa5f PM |
137 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
138 | struct reg_vpa { | |
139 | u32 dummy; | |
140 | union { | |
141 | u16 hword; | |
142 | u32 word; | |
143 | } length; | |
144 | }; | |
145 | ||
146 | static int vpa_is_registered(struct kvmppc_vpa *vpap) | |
147 | { | |
148 | if (vpap->update_pending) | |
149 | return vpap->next_gpa != 0; | |
150 | return vpap->pinned_addr != NULL; | |
151 | } | |
152 | ||
a8606e20 PM |
153 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
154 | unsigned long flags, | |
155 | unsigned long vcpuid, unsigned long vpa) | |
156 | { | |
157 | struct kvm *kvm = vcpu->kvm; | |
93e60249 | 158 | unsigned long len, nb; |
a8606e20 PM |
159 | void *va; |
160 | struct kvm_vcpu *tvcpu; | |
2e25aa5f PM |
161 | int err; |
162 | int subfunc; | |
163 | struct kvmppc_vpa *vpap; | |
a8606e20 PM |
164 | |
165 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); | |
166 | if (!tvcpu) | |
167 | return H_PARAMETER; | |
168 | ||
2e25aa5f PM |
169 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
170 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || | |
171 | subfunc == H_VPA_REG_SLB) { | |
172 | /* Registering new area - address must be cache-line aligned */ | |
173 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) | |
a8606e20 | 174 | return H_PARAMETER; |
2e25aa5f PM |
175 | |
176 | /* convert logical addr to kernel addr and read length */ | |
93e60249 PM |
177 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
178 | if (va == NULL) | |
b2b2f165 | 179 | return H_PARAMETER; |
2e25aa5f PM |
180 | if (subfunc == H_VPA_REG_VPA) |
181 | len = ((struct reg_vpa *)va)->length.hword; | |
a8606e20 | 182 | else |
2e25aa5f PM |
183 | len = ((struct reg_vpa *)va)->length.word; |
184 | kvmppc_unpin_guest_page(kvm, va); | |
185 | ||
186 | /* Check length */ | |
187 | if (len > nb || len < sizeof(struct reg_vpa)) | |
188 | return H_PARAMETER; | |
189 | } else { | |
190 | vpa = 0; | |
191 | len = 0; | |
192 | } | |
193 | ||
194 | err = H_PARAMETER; | |
195 | vpap = NULL; | |
196 | spin_lock(&tvcpu->arch.vpa_update_lock); | |
197 | ||
198 | switch (subfunc) { | |
199 | case H_VPA_REG_VPA: /* register VPA */ | |
200 | if (len < sizeof(struct lppaca)) | |
a8606e20 | 201 | break; |
2e25aa5f PM |
202 | vpap = &tvcpu->arch.vpa; |
203 | err = 0; | |
204 | break; | |
205 | ||
206 | case H_VPA_REG_DTL: /* register DTL */ | |
207 | if (len < sizeof(struct dtl_entry)) | |
a8606e20 | 208 | break; |
2e25aa5f PM |
209 | len -= len % sizeof(struct dtl_entry); |
210 | ||
211 | /* Check that they have previously registered a VPA */ | |
212 | err = H_RESOURCE; | |
213 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 214 | break; |
2e25aa5f PM |
215 | |
216 | vpap = &tvcpu->arch.dtl; | |
217 | err = 0; | |
218 | break; | |
219 | ||
220 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ | |
221 | /* Check that they have previously registered a VPA */ | |
222 | err = H_RESOURCE; | |
223 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 224 | break; |
2e25aa5f PM |
225 | |
226 | vpap = &tvcpu->arch.slb_shadow; | |
227 | err = 0; | |
228 | break; | |
229 | ||
230 | case H_VPA_DEREG_VPA: /* deregister VPA */ | |
231 | /* Check they don't still have a DTL or SLB buf registered */ | |
232 | err = H_RESOURCE; | |
233 | if (vpa_is_registered(&tvcpu->arch.dtl) || | |
234 | vpa_is_registered(&tvcpu->arch.slb_shadow)) | |
a8606e20 | 235 | break; |
2e25aa5f PM |
236 | |
237 | vpap = &tvcpu->arch.vpa; | |
238 | err = 0; | |
239 | break; | |
240 | ||
241 | case H_VPA_DEREG_DTL: /* deregister DTL */ | |
242 | vpap = &tvcpu->arch.dtl; | |
243 | err = 0; | |
244 | break; | |
245 | ||
246 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ | |
247 | vpap = &tvcpu->arch.slb_shadow; | |
248 | err = 0; | |
249 | break; | |
250 | } | |
251 | ||
252 | if (vpap) { | |
253 | vpap->next_gpa = vpa; | |
254 | vpap->len = len; | |
255 | vpap->update_pending = 1; | |
a8606e20 | 256 | } |
93e60249 | 257 | |
2e25aa5f PM |
258 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
259 | ||
93e60249 | 260 | return err; |
a8606e20 PM |
261 | } |
262 | ||
2e25aa5f PM |
263 | static void kvmppc_update_vpa(struct kvm *kvm, struct kvmppc_vpa *vpap) |
264 | { | |
265 | void *va; | |
266 | unsigned long nb; | |
267 | ||
268 | vpap->update_pending = 0; | |
269 | va = NULL; | |
270 | if (vpap->next_gpa) { | |
271 | va = kvmppc_pin_guest_page(kvm, vpap->next_gpa, &nb); | |
272 | if (nb < vpap->len) { | |
273 | /* | |
274 | * If it's now too short, it must be that userspace | |
275 | * has changed the mappings underlying guest memory, | |
276 | * so unregister the region. | |
277 | */ | |
278 | kvmppc_unpin_guest_page(kvm, va); | |
279 | va = NULL; | |
280 | } | |
281 | } | |
282 | if (vpap->pinned_addr) | |
283 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr); | |
284 | vpap->pinned_addr = va; | |
285 | if (va) | |
286 | vpap->pinned_end = va + vpap->len; | |
287 | } | |
288 | ||
289 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) | |
290 | { | |
291 | struct kvm *kvm = vcpu->kvm; | |
292 | ||
293 | spin_lock(&vcpu->arch.vpa_update_lock); | |
294 | if (vcpu->arch.vpa.update_pending) { | |
295 | kvmppc_update_vpa(kvm, &vcpu->arch.vpa); | |
296 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); | |
297 | } | |
298 | if (vcpu->arch.dtl.update_pending) { | |
299 | kvmppc_update_vpa(kvm, &vcpu->arch.dtl); | |
300 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; | |
301 | vcpu->arch.dtl_index = 0; | |
302 | } | |
303 | if (vcpu->arch.slb_shadow.update_pending) | |
304 | kvmppc_update_vpa(kvm, &vcpu->arch.slb_shadow); | |
305 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
306 | } | |
307 | ||
a8606e20 PM |
308 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
309 | { | |
310 | unsigned long req = kvmppc_get_gpr(vcpu, 3); | |
311 | unsigned long target, ret = H_SUCCESS; | |
312 | struct kvm_vcpu *tvcpu; | |
313 | ||
314 | switch (req) { | |
c77162de PM |
315 | case H_ENTER: |
316 | ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4), | |
317 | kvmppc_get_gpr(vcpu, 5), | |
318 | kvmppc_get_gpr(vcpu, 6), | |
319 | kvmppc_get_gpr(vcpu, 7)); | |
320 | break; | |
a8606e20 | 321 | case H_CEDE: |
a8606e20 PM |
322 | break; |
323 | case H_PROD: | |
324 | target = kvmppc_get_gpr(vcpu, 4); | |
325 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
326 | if (!tvcpu) { | |
327 | ret = H_PARAMETER; | |
328 | break; | |
329 | } | |
330 | tvcpu->arch.prodded = 1; | |
331 | smp_mb(); | |
332 | if (vcpu->arch.ceded) { | |
333 | if (waitqueue_active(&vcpu->wq)) { | |
334 | wake_up_interruptible(&vcpu->wq); | |
335 | vcpu->stat.halt_wakeup++; | |
336 | } | |
337 | } | |
338 | break; | |
339 | case H_CONFER: | |
340 | break; | |
341 | case H_REGISTER_VPA: | |
342 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), | |
343 | kvmppc_get_gpr(vcpu, 5), | |
344 | kvmppc_get_gpr(vcpu, 6)); | |
345 | break; | |
346 | default: | |
347 | return RESUME_HOST; | |
348 | } | |
349 | kvmppc_set_gpr(vcpu, 3, ret); | |
350 | vcpu->arch.hcall_needed = 0; | |
351 | return RESUME_GUEST; | |
352 | } | |
353 | ||
de56a948 PM |
354 | static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, |
355 | struct task_struct *tsk) | |
356 | { | |
357 | int r = RESUME_HOST; | |
358 | ||
359 | vcpu->stat.sum_exits++; | |
360 | ||
361 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
362 | run->ready_for_interrupt_injection = 1; | |
363 | switch (vcpu->arch.trap) { | |
364 | /* We're good on these - the host merely wanted to get our attention */ | |
365 | case BOOK3S_INTERRUPT_HV_DECREMENTER: | |
366 | vcpu->stat.dec_exits++; | |
367 | r = RESUME_GUEST; | |
368 | break; | |
369 | case BOOK3S_INTERRUPT_EXTERNAL: | |
370 | vcpu->stat.ext_intr_exits++; | |
371 | r = RESUME_GUEST; | |
372 | break; | |
373 | case BOOK3S_INTERRUPT_PERFMON: | |
374 | r = RESUME_GUEST; | |
375 | break; | |
376 | case BOOK3S_INTERRUPT_PROGRAM: | |
377 | { | |
378 | ulong flags; | |
379 | /* | |
380 | * Normally program interrupts are delivered directly | |
381 | * to the guest by the hardware, but we can get here | |
382 | * as a result of a hypervisor emulation interrupt | |
383 | * (e40) getting turned into a 700 by BML RTAS. | |
384 | */ | |
385 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; | |
386 | kvmppc_core_queue_program(vcpu, flags); | |
387 | r = RESUME_GUEST; | |
388 | break; | |
389 | } | |
390 | case BOOK3S_INTERRUPT_SYSCALL: | |
391 | { | |
392 | /* hcall - punt to userspace */ | |
393 | int i; | |
394 | ||
395 | if (vcpu->arch.shregs.msr & MSR_PR) { | |
396 | /* sc 1 from userspace - reflect to guest syscall */ | |
397 | kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_SYSCALL); | |
398 | r = RESUME_GUEST; | |
399 | break; | |
400 | } | |
401 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); | |
402 | for (i = 0; i < 9; ++i) | |
403 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); | |
404 | run->exit_reason = KVM_EXIT_PAPR_HCALL; | |
405 | vcpu->arch.hcall_needed = 1; | |
406 | r = RESUME_HOST; | |
407 | break; | |
408 | } | |
409 | /* | |
342d3db7 PM |
410 | * We get these next two if the guest accesses a page which it thinks |
411 | * it has mapped but which is not actually present, either because | |
412 | * it is for an emulated I/O device or because the corresonding | |
413 | * host page has been paged out. Any other HDSI/HISI interrupts | |
414 | * have been handled already. | |
de56a948 PM |
415 | */ |
416 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: | |
697d3899 PM |
417 | r = kvmppc_book3s_hv_page_fault(run, vcpu, |
418 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
de56a948 PM |
419 | break; |
420 | case BOOK3S_INTERRUPT_H_INST_STORAGE: | |
342d3db7 PM |
421 | r = kvmppc_book3s_hv_page_fault(run, vcpu, |
422 | kvmppc_get_pc(vcpu), 0); | |
de56a948 PM |
423 | break; |
424 | /* | |
425 | * This occurs if the guest executes an illegal instruction. | |
426 | * We just generate a program interrupt to the guest, since | |
427 | * we don't emulate any guest instructions at this stage. | |
428 | */ | |
429 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: | |
430 | kvmppc_core_queue_program(vcpu, 0x80000); | |
431 | r = RESUME_GUEST; | |
432 | break; | |
433 | default: | |
434 | kvmppc_dump_regs(vcpu); | |
435 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
436 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
437 | vcpu->arch.shregs.msr); | |
438 | r = RESUME_HOST; | |
439 | BUG(); | |
440 | break; | |
441 | } | |
442 | ||
de56a948 PM |
443 | return r; |
444 | } | |
445 | ||
446 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
447 | struct kvm_sregs *sregs) | |
448 | { | |
449 | int i; | |
450 | ||
451 | sregs->pvr = vcpu->arch.pvr; | |
452 | ||
453 | memset(sregs, 0, sizeof(struct kvm_sregs)); | |
454 | for (i = 0; i < vcpu->arch.slb_max; i++) { | |
455 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; | |
456 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; | |
457 | } | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
463 | struct kvm_sregs *sregs) | |
464 | { | |
465 | int i, j; | |
466 | ||
467 | kvmppc_set_pvr(vcpu, sregs->pvr); | |
468 | ||
469 | j = 0; | |
470 | for (i = 0; i < vcpu->arch.slb_nr; i++) { | |
471 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { | |
472 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; | |
473 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; | |
474 | ++j; | |
475 | } | |
476 | } | |
477 | vcpu->arch.slb_max = j; | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
31f3438e PM |
482 | int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) |
483 | { | |
484 | int r = -EINVAL; | |
485 | ||
486 | switch (reg->id) { | |
487 | case KVM_REG_PPC_HIOR: | |
488 | r = put_user(0, (u64 __user *)reg->addr); | |
489 | break; | |
490 | default: | |
491 | break; | |
492 | } | |
493 | ||
494 | return r; | |
495 | } | |
496 | ||
497 | int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) | |
498 | { | |
499 | int r = -EINVAL; | |
500 | ||
501 | switch (reg->id) { | |
502 | case KVM_REG_PPC_HIOR: | |
503 | { | |
504 | u64 hior; | |
505 | /* Only allow this to be set to zero */ | |
506 | r = get_user(hior, (u64 __user *)reg->addr); | |
507 | if (!r && (hior != 0)) | |
508 | r = -EINVAL; | |
509 | break; | |
510 | } | |
511 | default: | |
512 | break; | |
513 | } | |
514 | ||
515 | return r; | |
516 | } | |
517 | ||
de56a948 PM |
518 | int kvmppc_core_check_processor_compat(void) |
519 | { | |
9e368f29 | 520 | if (cpu_has_feature(CPU_FTR_HVMODE)) |
de56a948 PM |
521 | return 0; |
522 | return -EIO; | |
523 | } | |
524 | ||
525 | struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) | |
526 | { | |
527 | struct kvm_vcpu *vcpu; | |
371fefd6 PM |
528 | int err = -EINVAL; |
529 | int core; | |
530 | struct kvmppc_vcore *vcore; | |
de56a948 | 531 | |
371fefd6 PM |
532 | core = id / threads_per_core; |
533 | if (core >= KVM_MAX_VCORES) | |
534 | goto out; | |
535 | ||
536 | err = -ENOMEM; | |
6b75e6bf | 537 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
de56a948 PM |
538 | if (!vcpu) |
539 | goto out; | |
540 | ||
541 | err = kvm_vcpu_init(vcpu, kvm, id); | |
542 | if (err) | |
543 | goto free_vcpu; | |
544 | ||
545 | vcpu->arch.shared = &vcpu->arch.shregs; | |
546 | vcpu->arch.last_cpu = -1; | |
547 | vcpu->arch.mmcr[0] = MMCR0_FC; | |
548 | vcpu->arch.ctrl = CTRL_RUNLATCH; | |
549 | /* default to host PVR, since we can't spoof it */ | |
550 | vcpu->arch.pvr = mfspr(SPRN_PVR); | |
551 | kvmppc_set_pvr(vcpu, vcpu->arch.pvr); | |
2e25aa5f | 552 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
de56a948 | 553 | |
de56a948 PM |
554 | kvmppc_mmu_book3s_hv_init(vcpu); |
555 | ||
371fefd6 | 556 | /* |
19ccb76a | 557 | * We consider the vcpu stopped until we see the first run ioctl for it. |
371fefd6 | 558 | */ |
19ccb76a | 559 | vcpu->arch.state = KVMPPC_VCPU_STOPPED; |
371fefd6 PM |
560 | |
561 | init_waitqueue_head(&vcpu->arch.cpu_run); | |
562 | ||
563 | mutex_lock(&kvm->lock); | |
564 | vcore = kvm->arch.vcores[core]; | |
565 | if (!vcore) { | |
566 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); | |
567 | if (vcore) { | |
568 | INIT_LIST_HEAD(&vcore->runnable_threads); | |
569 | spin_lock_init(&vcore->lock); | |
19ccb76a | 570 | init_waitqueue_head(&vcore->wq); |
371fefd6 PM |
571 | } |
572 | kvm->arch.vcores[core] = vcore; | |
573 | } | |
574 | mutex_unlock(&kvm->lock); | |
575 | ||
576 | if (!vcore) | |
577 | goto free_vcpu; | |
578 | ||
579 | spin_lock(&vcore->lock); | |
580 | ++vcore->num_threads; | |
371fefd6 PM |
581 | spin_unlock(&vcore->lock); |
582 | vcpu->arch.vcore = vcore; | |
583 | ||
af8f38b3 AG |
584 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
585 | kvmppc_sanity_check(vcpu); | |
586 | ||
de56a948 PM |
587 | return vcpu; |
588 | ||
589 | free_vcpu: | |
6b75e6bf | 590 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
591 | out: |
592 | return ERR_PTR(err); | |
593 | } | |
594 | ||
595 | void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) | |
596 | { | |
2e25aa5f PM |
597 | spin_lock(&vcpu->arch.vpa_update_lock); |
598 | if (vcpu->arch.dtl.pinned_addr) | |
599 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.dtl.pinned_addr); | |
600 | if (vcpu->arch.slb_shadow.pinned_addr) | |
601 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.slb_shadow.pinned_addr); | |
602 | if (vcpu->arch.vpa.pinned_addr) | |
603 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.vpa.pinned_addr); | |
604 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
de56a948 | 605 | kvm_vcpu_uninit(vcpu); |
6b75e6bf | 606 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
607 | } |
608 | ||
19ccb76a | 609 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
371fefd6 | 610 | { |
19ccb76a | 611 | unsigned long dec_nsec, now; |
371fefd6 | 612 | |
19ccb76a PM |
613 | now = get_tb(); |
614 | if (now > vcpu->arch.dec_expires) { | |
615 | /* decrementer has already gone negative */ | |
616 | kvmppc_core_queue_dec(vcpu); | |
7e28e60e | 617 | kvmppc_core_prepare_to_enter(vcpu); |
19ccb76a | 618 | return; |
371fefd6 | 619 | } |
19ccb76a PM |
620 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
621 | / tb_ticks_per_sec; | |
622 | hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), | |
623 | HRTIMER_MODE_REL); | |
624 | vcpu->arch.timer_running = 1; | |
371fefd6 PM |
625 | } |
626 | ||
19ccb76a | 627 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
371fefd6 | 628 | { |
19ccb76a PM |
629 | vcpu->arch.ceded = 0; |
630 | if (vcpu->arch.timer_running) { | |
631 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
632 | vcpu->arch.timer_running = 0; | |
633 | } | |
371fefd6 PM |
634 | } |
635 | ||
de56a948 | 636 | extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); |
371fefd6 | 637 | extern void xics_wake_cpu(int cpu); |
de56a948 | 638 | |
371fefd6 PM |
639 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
640 | struct kvm_vcpu *vcpu) | |
de56a948 | 641 | { |
371fefd6 | 642 | struct kvm_vcpu *v; |
de56a948 | 643 | |
371fefd6 PM |
644 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
645 | return; | |
646 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; | |
647 | --vc->n_runnable; | |
19ccb76a | 648 | ++vc->n_busy; |
371fefd6 PM |
649 | /* decrement the physical thread id of each following vcpu */ |
650 | v = vcpu; | |
651 | list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list) | |
652 | --v->arch.ptid; | |
653 | list_del(&vcpu->arch.run_list); | |
654 | } | |
655 | ||
f0888f70 PM |
656 | static int kvmppc_grab_hwthread(int cpu) |
657 | { | |
658 | struct paca_struct *tpaca; | |
659 | long timeout = 1000; | |
660 | ||
661 | tpaca = &paca[cpu]; | |
662 | ||
663 | /* Ensure the thread won't go into the kernel if it wakes */ | |
664 | tpaca->kvm_hstate.hwthread_req = 1; | |
665 | ||
666 | /* | |
667 | * If the thread is already executing in the kernel (e.g. handling | |
668 | * a stray interrupt), wait for it to get back to nap mode. | |
669 | * The smp_mb() is to ensure that our setting of hwthread_req | |
670 | * is visible before we look at hwthread_state, so if this | |
671 | * races with the code at system_reset_pSeries and the thread | |
672 | * misses our setting of hwthread_req, we are sure to see its | |
673 | * setting of hwthread_state, and vice versa. | |
674 | */ | |
675 | smp_mb(); | |
676 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { | |
677 | if (--timeout <= 0) { | |
678 | pr_err("KVM: couldn't grab cpu %d\n", cpu); | |
679 | return -EBUSY; | |
680 | } | |
681 | udelay(1); | |
682 | } | |
683 | return 0; | |
684 | } | |
685 | ||
686 | static void kvmppc_release_hwthread(int cpu) | |
687 | { | |
688 | struct paca_struct *tpaca; | |
689 | ||
690 | tpaca = &paca[cpu]; | |
691 | tpaca->kvm_hstate.hwthread_req = 0; | |
692 | tpaca->kvm_hstate.kvm_vcpu = NULL; | |
693 | } | |
694 | ||
371fefd6 PM |
695 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu) |
696 | { | |
697 | int cpu; | |
698 | struct paca_struct *tpaca; | |
699 | struct kvmppc_vcore *vc = vcpu->arch.vcore; | |
700 | ||
19ccb76a PM |
701 | if (vcpu->arch.timer_running) { |
702 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
703 | vcpu->arch.timer_running = 0; | |
704 | } | |
371fefd6 PM |
705 | cpu = vc->pcpu + vcpu->arch.ptid; |
706 | tpaca = &paca[cpu]; | |
707 | tpaca->kvm_hstate.kvm_vcpu = vcpu; | |
708 | tpaca->kvm_hstate.kvm_vcore = vc; | |
19ccb76a PM |
709 | tpaca->kvm_hstate.napping = 0; |
710 | vcpu->cpu = vc->pcpu; | |
371fefd6 | 711 | smp_wmb(); |
251da038 | 712 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) |
371fefd6 | 713 | if (vcpu->arch.ptid) { |
f0888f70 | 714 | kvmppc_grab_hwthread(cpu); |
371fefd6 PM |
715 | xics_wake_cpu(cpu); |
716 | ++vc->n_woken; | |
de56a948 | 717 | } |
371fefd6 PM |
718 | #endif |
719 | } | |
de56a948 | 720 | |
371fefd6 PM |
721 | static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc) |
722 | { | |
723 | int i; | |
724 | ||
725 | HMT_low(); | |
726 | i = 0; | |
727 | while (vc->nap_count < vc->n_woken) { | |
728 | if (++i >= 1000000) { | |
729 | pr_err("kvmppc_wait_for_nap timeout %d %d\n", | |
730 | vc->nap_count, vc->n_woken); | |
731 | break; | |
732 | } | |
733 | cpu_relax(); | |
734 | } | |
735 | HMT_medium(); | |
736 | } | |
737 | ||
738 | /* | |
739 | * Check that we are on thread 0 and that any other threads in | |
740 | * this core are off-line. | |
741 | */ | |
742 | static int on_primary_thread(void) | |
743 | { | |
744 | int cpu = smp_processor_id(); | |
745 | int thr = cpu_thread_in_core(cpu); | |
746 | ||
747 | if (thr) | |
748 | return 0; | |
749 | while (++thr < threads_per_core) | |
750 | if (cpu_online(cpu + thr)) | |
751 | return 0; | |
752 | return 1; | |
753 | } | |
754 | ||
755 | /* | |
756 | * Run a set of guest threads on a physical core. | |
757 | * Called with vc->lock held. | |
758 | */ | |
759 | static int kvmppc_run_core(struct kvmppc_vcore *vc) | |
760 | { | |
19ccb76a | 761 | struct kvm_vcpu *vcpu, *vcpu0, *vnext; |
371fefd6 PM |
762 | long ret; |
763 | u64 now; | |
f0888f70 | 764 | int ptid, i; |
371fefd6 PM |
765 | |
766 | /* don't start if any threads have a signal pending */ | |
767 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
768 | if (signal_pending(vcpu->arch.run_task)) | |
769 | return 0; | |
de56a948 PM |
770 | |
771 | /* | |
772 | * Make sure we are running on thread 0, and that | |
773 | * secondary threads are offline. | |
774 | * XXX we should also block attempts to bring any | |
775 | * secondary threads online. | |
776 | */ | |
371fefd6 PM |
777 | if (threads_per_core > 1 && !on_primary_thread()) { |
778 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
779 | vcpu->arch.ret = -EBUSY; | |
780 | goto out; | |
de56a948 PM |
781 | } |
782 | ||
19ccb76a PM |
783 | /* |
784 | * Assign physical thread IDs, first to non-ceded vcpus | |
785 | * and then to ceded ones. | |
786 | */ | |
787 | ptid = 0; | |
788 | vcpu0 = NULL; | |
789 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { | |
790 | if (!vcpu->arch.ceded) { | |
791 | if (!ptid) | |
792 | vcpu0 = vcpu; | |
793 | vcpu->arch.ptid = ptid++; | |
794 | } | |
795 | } | |
796 | if (!vcpu0) | |
797 | return 0; /* nothing to run */ | |
798 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
799 | if (vcpu->arch.ceded) | |
800 | vcpu->arch.ptid = ptid++; | |
801 | ||
371fefd6 PM |
802 | vc->n_woken = 0; |
803 | vc->nap_count = 0; | |
804 | vc->entry_exit_count = 0; | |
19ccb76a | 805 | vc->vcore_state = VCORE_RUNNING; |
371fefd6 PM |
806 | vc->in_guest = 0; |
807 | vc->pcpu = smp_processor_id(); | |
19ccb76a | 808 | vc->napping_threads = 0; |
2e25aa5f | 809 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
371fefd6 | 810 | kvmppc_start_thread(vcpu); |
2e25aa5f PM |
811 | if (vcpu->arch.vpa.update_pending || |
812 | vcpu->arch.slb_shadow.update_pending || | |
813 | vcpu->arch.dtl.update_pending) | |
814 | kvmppc_update_vpas(vcpu); | |
815 | } | |
f0888f70 PM |
816 | /* Grab any remaining hw threads so they can't go into the kernel */ |
817 | for (i = ptid; i < threads_per_core; ++i) | |
818 | kvmppc_grab_hwthread(vc->pcpu + i); | |
371fefd6 | 819 | |
19ccb76a | 820 | preempt_disable(); |
371fefd6 | 821 | spin_unlock(&vc->lock); |
de56a948 | 822 | |
371fefd6 | 823 | kvm_guest_enter(); |
19ccb76a | 824 | __kvmppc_vcore_entry(NULL, vcpu0); |
f0888f70 PM |
825 | for (i = 0; i < threads_per_core; ++i) |
826 | kvmppc_release_hwthread(vc->pcpu + i); | |
de56a948 | 827 | |
371fefd6 | 828 | spin_lock(&vc->lock); |
19ccb76a PM |
829 | /* disable sending of IPIs on virtual external irqs */ |
830 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
831 | vcpu->cpu = -1; | |
832 | /* wait for secondary threads to finish writing their state to memory */ | |
371fefd6 PM |
833 | if (vc->nap_count < vc->n_woken) |
834 | kvmppc_wait_for_nap(vc); | |
835 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ | |
19ccb76a | 836 | vc->vcore_state = VCORE_EXITING; |
371fefd6 PM |
837 | spin_unlock(&vc->lock); |
838 | ||
839 | /* make sure updates to secondary vcpu structs are visible now */ | |
840 | smp_mb(); | |
de56a948 PM |
841 | kvm_guest_exit(); |
842 | ||
843 | preempt_enable(); | |
844 | kvm_resched(vcpu); | |
845 | ||
846 | now = get_tb(); | |
371fefd6 PM |
847 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
848 | /* cancel pending dec exception if dec is positive */ | |
849 | if (now < vcpu->arch.dec_expires && | |
850 | kvmppc_core_pending_dec(vcpu)) | |
851 | kvmppc_core_dequeue_dec(vcpu); | |
19ccb76a PM |
852 | |
853 | ret = RESUME_GUEST; | |
854 | if (vcpu->arch.trap) | |
855 | ret = kvmppc_handle_exit(vcpu->arch.kvm_run, vcpu, | |
856 | vcpu->arch.run_task); | |
857 | ||
371fefd6 PM |
858 | vcpu->arch.ret = ret; |
859 | vcpu->arch.trap = 0; | |
19ccb76a PM |
860 | |
861 | if (vcpu->arch.ceded) { | |
862 | if (ret != RESUME_GUEST) | |
863 | kvmppc_end_cede(vcpu); | |
864 | else | |
865 | kvmppc_set_timer(vcpu); | |
866 | } | |
371fefd6 | 867 | } |
de56a948 | 868 | |
371fefd6 | 869 | spin_lock(&vc->lock); |
de56a948 | 870 | out: |
19ccb76a | 871 | vc->vcore_state = VCORE_INACTIVE; |
371fefd6 PM |
872 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, |
873 | arch.run_list) { | |
874 | if (vcpu->arch.ret != RESUME_GUEST) { | |
875 | kvmppc_remove_runnable(vc, vcpu); | |
876 | wake_up(&vcpu->arch.cpu_run); | |
877 | } | |
878 | } | |
879 | ||
880 | return 1; | |
881 | } | |
882 | ||
19ccb76a PM |
883 | /* |
884 | * Wait for some other vcpu thread to execute us, and | |
885 | * wake us up when we need to handle something in the host. | |
886 | */ | |
887 | static void kvmppc_wait_for_exec(struct kvm_vcpu *vcpu, int wait_state) | |
371fefd6 | 888 | { |
371fefd6 PM |
889 | DEFINE_WAIT(wait); |
890 | ||
19ccb76a PM |
891 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
892 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) | |
893 | schedule(); | |
894 | finish_wait(&vcpu->arch.cpu_run, &wait); | |
895 | } | |
896 | ||
897 | /* | |
898 | * All the vcpus in this vcore are idle, so wait for a decrementer | |
899 | * or external interrupt to one of the vcpus. vc->lock is held. | |
900 | */ | |
901 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) | |
902 | { | |
903 | DEFINE_WAIT(wait); | |
904 | struct kvm_vcpu *v; | |
905 | int all_idle = 1; | |
906 | ||
907 | prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); | |
908 | vc->vcore_state = VCORE_SLEEPING; | |
909 | spin_unlock(&vc->lock); | |
910 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) { | |
911 | if (!v->arch.ceded || v->arch.pending_exceptions) { | |
912 | all_idle = 0; | |
913 | break; | |
914 | } | |
371fefd6 | 915 | } |
19ccb76a PM |
916 | if (all_idle) |
917 | schedule(); | |
918 | finish_wait(&vc->wq, &wait); | |
919 | spin_lock(&vc->lock); | |
920 | vc->vcore_state = VCORE_INACTIVE; | |
921 | } | |
371fefd6 | 922 | |
19ccb76a PM |
923 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
924 | { | |
925 | int n_ceded; | |
926 | int prev_state; | |
927 | struct kvmppc_vcore *vc; | |
928 | struct kvm_vcpu *v, *vn; | |
9e368f29 | 929 | |
371fefd6 PM |
930 | kvm_run->exit_reason = 0; |
931 | vcpu->arch.ret = RESUME_GUEST; | |
932 | vcpu->arch.trap = 0; | |
933 | ||
371fefd6 PM |
934 | /* |
935 | * Synchronize with other threads in this virtual core | |
936 | */ | |
937 | vc = vcpu->arch.vcore; | |
938 | spin_lock(&vc->lock); | |
19ccb76a | 939 | vcpu->arch.ceded = 0; |
371fefd6 PM |
940 | vcpu->arch.run_task = current; |
941 | vcpu->arch.kvm_run = kvm_run; | |
19ccb76a PM |
942 | prev_state = vcpu->arch.state; |
943 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; | |
371fefd6 PM |
944 | list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads); |
945 | ++vc->n_runnable; | |
946 | ||
19ccb76a PM |
947 | /* |
948 | * This happens the first time this is called for a vcpu. | |
949 | * If the vcore is already running, we may be able to start | |
950 | * this thread straight away and have it join in. | |
951 | */ | |
952 | if (prev_state == KVMPPC_VCPU_STOPPED) { | |
953 | if (vc->vcore_state == VCORE_RUNNING && | |
954 | VCORE_EXIT_COUNT(vc) == 0) { | |
955 | vcpu->arch.ptid = vc->n_runnable - 1; | |
956 | kvmppc_start_thread(vcpu); | |
371fefd6 PM |
957 | } |
958 | ||
19ccb76a PM |
959 | } else if (prev_state == KVMPPC_VCPU_BUSY_IN_HOST) |
960 | --vc->n_busy; | |
371fefd6 | 961 | |
19ccb76a PM |
962 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
963 | !signal_pending(current)) { | |
964 | if (vc->n_busy || vc->vcore_state != VCORE_INACTIVE) { | |
965 | spin_unlock(&vc->lock); | |
966 | kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE); | |
967 | spin_lock(&vc->lock); | |
968 | continue; | |
969 | } | |
970 | n_ceded = 0; | |
971 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) | |
972 | n_ceded += v->arch.ceded; | |
973 | if (n_ceded == vc->n_runnable) | |
974 | kvmppc_vcore_blocked(vc); | |
975 | else | |
976 | kvmppc_run_core(vc); | |
977 | ||
978 | list_for_each_entry_safe(v, vn, &vc->runnable_threads, | |
979 | arch.run_list) { | |
7e28e60e | 980 | kvmppc_core_prepare_to_enter(v); |
19ccb76a PM |
981 | if (signal_pending(v->arch.run_task)) { |
982 | kvmppc_remove_runnable(vc, v); | |
983 | v->stat.signal_exits++; | |
984 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; | |
985 | v->arch.ret = -EINTR; | |
986 | wake_up(&v->arch.cpu_run); | |
987 | } | |
988 | } | |
989 | } | |
371fefd6 | 990 | |
19ccb76a PM |
991 | if (signal_pending(current)) { |
992 | if (vc->vcore_state == VCORE_RUNNING || | |
993 | vc->vcore_state == VCORE_EXITING) { | |
994 | spin_unlock(&vc->lock); | |
995 | kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE); | |
996 | spin_lock(&vc->lock); | |
997 | } | |
998 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { | |
999 | kvmppc_remove_runnable(vc, vcpu); | |
1000 | vcpu->stat.signal_exits++; | |
1001 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
1002 | vcpu->arch.ret = -EINTR; | |
1003 | } | |
371fefd6 PM |
1004 | } |
1005 | ||
371fefd6 | 1006 | spin_unlock(&vc->lock); |
371fefd6 | 1007 | return vcpu->arch.ret; |
de56a948 PM |
1008 | } |
1009 | ||
a8606e20 PM |
1010 | int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu) |
1011 | { | |
1012 | int r; | |
1013 | ||
af8f38b3 AG |
1014 | if (!vcpu->arch.sane) { |
1015 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
1016 | return -EINVAL; | |
1017 | } | |
1018 | ||
25051b5a SW |
1019 | kvmppc_core_prepare_to_enter(vcpu); |
1020 | ||
19ccb76a PM |
1021 | /* No need to go into the guest when all we'll do is come back out */ |
1022 | if (signal_pending(current)) { | |
1023 | run->exit_reason = KVM_EXIT_INTR; | |
1024 | return -EINTR; | |
1025 | } | |
1026 | ||
c77162de PM |
1027 | /* On the first time here, set up VRMA or RMA */ |
1028 | if (!vcpu->kvm->arch.rma_setup_done) { | |
1029 | r = kvmppc_hv_setup_rma(vcpu); | |
1030 | if (r) | |
1031 | return r; | |
1032 | } | |
19ccb76a PM |
1033 | |
1034 | flush_fp_to_thread(current); | |
1035 | flush_altivec_to_thread(current); | |
1036 | flush_vsx_to_thread(current); | |
1037 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; | |
342d3db7 | 1038 | vcpu->arch.pgdir = current->mm->pgd; |
19ccb76a | 1039 | |
a8606e20 PM |
1040 | do { |
1041 | r = kvmppc_run_vcpu(run, vcpu); | |
1042 | ||
1043 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && | |
1044 | !(vcpu->arch.shregs.msr & MSR_PR)) { | |
1045 | r = kvmppc_pseries_do_hcall(vcpu); | |
7e28e60e | 1046 | kvmppc_core_prepare_to_enter(vcpu); |
a8606e20 PM |
1047 | } |
1048 | } while (r == RESUME_GUEST); | |
1049 | return r; | |
1050 | } | |
1051 | ||
54738c09 DG |
1052 | static long kvmppc_stt_npages(unsigned long window_size) |
1053 | { | |
1054 | return ALIGN((window_size >> SPAPR_TCE_SHIFT) | |
1055 | * sizeof(u64), PAGE_SIZE) / PAGE_SIZE; | |
1056 | } | |
1057 | ||
1058 | static void release_spapr_tce_table(struct kvmppc_spapr_tce_table *stt) | |
1059 | { | |
1060 | struct kvm *kvm = stt->kvm; | |
1061 | int i; | |
1062 | ||
1063 | mutex_lock(&kvm->lock); | |
1064 | list_del(&stt->list); | |
1065 | for (i = 0; i < kvmppc_stt_npages(stt->window_size); i++) | |
1066 | __free_page(stt->pages[i]); | |
1067 | kfree(stt); | |
1068 | mutex_unlock(&kvm->lock); | |
1069 | ||
1070 | kvm_put_kvm(kvm); | |
1071 | } | |
1072 | ||
1073 | static int kvm_spapr_tce_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1074 | { | |
1075 | struct kvmppc_spapr_tce_table *stt = vma->vm_file->private_data; | |
1076 | struct page *page; | |
1077 | ||
1078 | if (vmf->pgoff >= kvmppc_stt_npages(stt->window_size)) | |
1079 | return VM_FAULT_SIGBUS; | |
1080 | ||
1081 | page = stt->pages[vmf->pgoff]; | |
1082 | get_page(page); | |
1083 | vmf->page = page; | |
1084 | return 0; | |
1085 | } | |
1086 | ||
1087 | static const struct vm_operations_struct kvm_spapr_tce_vm_ops = { | |
1088 | .fault = kvm_spapr_tce_fault, | |
1089 | }; | |
1090 | ||
1091 | static int kvm_spapr_tce_mmap(struct file *file, struct vm_area_struct *vma) | |
1092 | { | |
1093 | vma->vm_ops = &kvm_spapr_tce_vm_ops; | |
1094 | return 0; | |
1095 | } | |
1096 | ||
1097 | static int kvm_spapr_tce_release(struct inode *inode, struct file *filp) | |
1098 | { | |
1099 | struct kvmppc_spapr_tce_table *stt = filp->private_data; | |
1100 | ||
1101 | release_spapr_tce_table(stt); | |
1102 | return 0; | |
1103 | } | |
1104 | ||
1105 | static struct file_operations kvm_spapr_tce_fops = { | |
1106 | .mmap = kvm_spapr_tce_mmap, | |
1107 | .release = kvm_spapr_tce_release, | |
1108 | }; | |
1109 | ||
1110 | long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm, | |
1111 | struct kvm_create_spapr_tce *args) | |
1112 | { | |
1113 | struct kvmppc_spapr_tce_table *stt = NULL; | |
1114 | long npages; | |
1115 | int ret = -ENOMEM; | |
1116 | int i; | |
1117 | ||
1118 | /* Check this LIOBN hasn't been previously allocated */ | |
1119 | list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) { | |
1120 | if (stt->liobn == args->liobn) | |
1121 | return -EBUSY; | |
1122 | } | |
1123 | ||
1124 | npages = kvmppc_stt_npages(args->window_size); | |
1125 | ||
1126 | stt = kzalloc(sizeof(*stt) + npages* sizeof(struct page *), | |
1127 | GFP_KERNEL); | |
1128 | if (!stt) | |
1129 | goto fail; | |
1130 | ||
1131 | stt->liobn = args->liobn; | |
1132 | stt->window_size = args->window_size; | |
1133 | stt->kvm = kvm; | |
1134 | ||
1135 | for (i = 0; i < npages; i++) { | |
1136 | stt->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
1137 | if (!stt->pages[i]) | |
1138 | goto fail; | |
1139 | } | |
1140 | ||
1141 | kvm_get_kvm(kvm); | |
1142 | ||
1143 | mutex_lock(&kvm->lock); | |
1144 | list_add(&stt->list, &kvm->arch.spapr_tce_tables); | |
1145 | ||
1146 | mutex_unlock(&kvm->lock); | |
1147 | ||
1148 | return anon_inode_getfd("kvm-spapr-tce", &kvm_spapr_tce_fops, | |
1149 | stt, O_RDWR); | |
1150 | ||
1151 | fail: | |
1152 | if (stt) { | |
1153 | for (i = 0; i < npages; i++) | |
1154 | if (stt->pages[i]) | |
1155 | __free_page(stt->pages[i]); | |
1156 | ||
1157 | kfree(stt); | |
1158 | } | |
1159 | return ret; | |
1160 | } | |
1161 | ||
aa04b4cc | 1162 | /* Work out RMLS (real mode limit selector) field value for a given RMA size. |
9e368f29 | 1163 | Assumes POWER7 or PPC970. */ |
aa04b4cc PM |
1164 | static inline int lpcr_rmls(unsigned long rma_size) |
1165 | { | |
1166 | switch (rma_size) { | |
1167 | case 32ul << 20: /* 32 MB */ | |
9e368f29 PM |
1168 | if (cpu_has_feature(CPU_FTR_ARCH_206)) |
1169 | return 8; /* only supported on POWER7 */ | |
1170 | return -1; | |
aa04b4cc PM |
1171 | case 64ul << 20: /* 64 MB */ |
1172 | return 3; | |
1173 | case 128ul << 20: /* 128 MB */ | |
1174 | return 7; | |
1175 | case 256ul << 20: /* 256 MB */ | |
1176 | return 4; | |
1177 | case 1ul << 30: /* 1 GB */ | |
1178 | return 2; | |
1179 | case 16ul << 30: /* 16 GB */ | |
1180 | return 1; | |
1181 | case 256ul << 30: /* 256 GB */ | |
1182 | return 0; | |
1183 | default: | |
1184 | return -1; | |
1185 | } | |
1186 | } | |
1187 | ||
1188 | static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1189 | { | |
b4e70611 | 1190 | struct kvmppc_linear_info *ri = vma->vm_file->private_data; |
aa04b4cc PM |
1191 | struct page *page; |
1192 | ||
1193 | if (vmf->pgoff >= ri->npages) | |
1194 | return VM_FAULT_SIGBUS; | |
1195 | ||
1196 | page = pfn_to_page(ri->base_pfn + vmf->pgoff); | |
1197 | get_page(page); | |
1198 | vmf->page = page; | |
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | static const struct vm_operations_struct kvm_rma_vm_ops = { | |
1203 | .fault = kvm_rma_fault, | |
1204 | }; | |
1205 | ||
1206 | static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma) | |
1207 | { | |
1208 | vma->vm_flags |= VM_RESERVED; | |
1209 | vma->vm_ops = &kvm_rma_vm_ops; | |
1210 | return 0; | |
1211 | } | |
1212 | ||
1213 | static int kvm_rma_release(struct inode *inode, struct file *filp) | |
1214 | { | |
b4e70611 | 1215 | struct kvmppc_linear_info *ri = filp->private_data; |
aa04b4cc PM |
1216 | |
1217 | kvm_release_rma(ri); | |
1218 | return 0; | |
1219 | } | |
1220 | ||
1221 | static struct file_operations kvm_rma_fops = { | |
1222 | .mmap = kvm_rma_mmap, | |
1223 | .release = kvm_rma_release, | |
1224 | }; | |
1225 | ||
1226 | long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret) | |
1227 | { | |
b4e70611 | 1228 | struct kvmppc_linear_info *ri; |
aa04b4cc PM |
1229 | long fd; |
1230 | ||
1231 | ri = kvm_alloc_rma(); | |
1232 | if (!ri) | |
1233 | return -ENOMEM; | |
1234 | ||
1235 | fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR); | |
1236 | if (fd < 0) | |
1237 | kvm_release_rma(ri); | |
1238 | ||
1239 | ret->rma_size = ri->npages << PAGE_SHIFT; | |
1240 | return fd; | |
1241 | } | |
1242 | ||
82ed3616 PM |
1243 | /* |
1244 | * Get (and clear) the dirty memory log for a memory slot. | |
1245 | */ | |
1246 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) | |
1247 | { | |
1248 | struct kvm_memory_slot *memslot; | |
1249 | int r; | |
1250 | unsigned long n; | |
1251 | ||
1252 | mutex_lock(&kvm->slots_lock); | |
1253 | ||
1254 | r = -EINVAL; | |
1255 | if (log->slot >= KVM_MEMORY_SLOTS) | |
1256 | goto out; | |
1257 | ||
1258 | memslot = id_to_memslot(kvm->memslots, log->slot); | |
1259 | r = -ENOENT; | |
1260 | if (!memslot->dirty_bitmap) | |
1261 | goto out; | |
1262 | ||
1263 | n = kvm_dirty_bitmap_bytes(memslot); | |
1264 | memset(memslot->dirty_bitmap, 0, n); | |
1265 | ||
1266 | r = kvmppc_hv_get_dirty_log(kvm, memslot); | |
1267 | if (r) | |
1268 | goto out; | |
1269 | ||
1270 | r = -EFAULT; | |
1271 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
1272 | goto out; | |
1273 | ||
1274 | r = 0; | |
1275 | out: | |
1276 | mutex_unlock(&kvm->slots_lock); | |
1277 | return r; | |
1278 | } | |
1279 | ||
da9d1d7f PM |
1280 | static unsigned long slb_pgsize_encoding(unsigned long psize) |
1281 | { | |
1282 | unsigned long senc = 0; | |
1283 | ||
1284 | if (psize > 0x1000) { | |
1285 | senc = SLB_VSID_L; | |
1286 | if (psize == 0x10000) | |
1287 | senc |= SLB_VSID_LP_01; | |
1288 | } | |
1289 | return senc; | |
1290 | } | |
1291 | ||
de56a948 PM |
1292 | int kvmppc_core_prepare_memory_region(struct kvm *kvm, |
1293 | struct kvm_userspace_memory_region *mem) | |
1294 | { | |
c77162de | 1295 | unsigned long npages; |
b2b2f165 | 1296 | unsigned long *phys; |
aa04b4cc | 1297 | |
b2b2f165 | 1298 | /* Allocate a slot_phys array */ |
b2b2f165 | 1299 | phys = kvm->arch.slot_phys[mem->slot]; |
342d3db7 PM |
1300 | if (!kvm->arch.using_mmu_notifiers && !phys) { |
1301 | npages = mem->memory_size >> PAGE_SHIFT; | |
b2b2f165 PM |
1302 | phys = vzalloc(npages * sizeof(unsigned long)); |
1303 | if (!phys) | |
1304 | return -ENOMEM; | |
1305 | kvm->arch.slot_phys[mem->slot] = phys; | |
1306 | kvm->arch.slot_npages[mem->slot] = npages; | |
1307 | } | |
aa04b4cc | 1308 | |
c77162de PM |
1309 | return 0; |
1310 | } | |
aa04b4cc | 1311 | |
c77162de PM |
1312 | static void unpin_slot(struct kvm *kvm, int slot_id) |
1313 | { | |
1314 | unsigned long *physp; | |
1315 | unsigned long j, npages, pfn; | |
1316 | struct page *page; | |
1317 | ||
1318 | physp = kvm->arch.slot_phys[slot_id]; | |
1319 | npages = kvm->arch.slot_npages[slot_id]; | |
1320 | if (physp) { | |
1321 | spin_lock(&kvm->arch.slot_phys_lock); | |
1322 | for (j = 0; j < npages; j++) { | |
1323 | if (!(physp[j] & KVMPPC_GOT_PAGE)) | |
1324 | continue; | |
1325 | pfn = physp[j] >> PAGE_SHIFT; | |
1326 | page = pfn_to_page(pfn); | |
da9d1d7f PM |
1327 | if (PageHuge(page)) |
1328 | page = compound_head(page); | |
c77162de PM |
1329 | SetPageDirty(page); |
1330 | put_page(page); | |
9e368f29 | 1331 | } |
c77162de PM |
1332 | kvm->arch.slot_phys[slot_id] = NULL; |
1333 | spin_unlock(&kvm->arch.slot_phys_lock); | |
1334 | vfree(physp); | |
aa04b4cc | 1335 | } |
c77162de PM |
1336 | } |
1337 | ||
1338 | void kvmppc_core_commit_memory_region(struct kvm *kvm, | |
1339 | struct kvm_userspace_memory_region *mem) | |
1340 | { | |
1341 | } | |
1342 | ||
1343 | static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu) | |
1344 | { | |
1345 | int err = 0; | |
1346 | struct kvm *kvm = vcpu->kvm; | |
b4e70611 | 1347 | struct kvmppc_linear_info *ri = NULL; |
c77162de PM |
1348 | unsigned long hva; |
1349 | struct kvm_memory_slot *memslot; | |
1350 | struct vm_area_struct *vma; | |
da9d1d7f | 1351 | unsigned long lpcr, senc; |
c77162de PM |
1352 | unsigned long psize, porder; |
1353 | unsigned long rma_size; | |
1354 | unsigned long rmls; | |
1355 | unsigned long *physp; | |
da9d1d7f | 1356 | unsigned long i, npages; |
c77162de PM |
1357 | |
1358 | mutex_lock(&kvm->lock); | |
1359 | if (kvm->arch.rma_setup_done) | |
1360 | goto out; /* another vcpu beat us to it */ | |
aa04b4cc | 1361 | |
c77162de PM |
1362 | /* Look up the memslot for guest physical address 0 */ |
1363 | memslot = gfn_to_memslot(kvm, 0); | |
aa04b4cc | 1364 | |
c77162de PM |
1365 | /* We must have some memory at 0 by now */ |
1366 | err = -EINVAL; | |
1367 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) | |
1368 | goto out; | |
1369 | ||
1370 | /* Look up the VMA for the start of this memory slot */ | |
1371 | hva = memslot->userspace_addr; | |
1372 | down_read(¤t->mm->mmap_sem); | |
1373 | vma = find_vma(current->mm, hva); | |
1374 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) | |
1375 | goto up_out; | |
1376 | ||
1377 | psize = vma_kernel_pagesize(vma); | |
da9d1d7f | 1378 | porder = __ilog2(psize); |
c77162de PM |
1379 | |
1380 | /* Is this one of our preallocated RMAs? */ | |
1381 | if (vma->vm_file && vma->vm_file->f_op == &kvm_rma_fops && | |
1382 | hva == vma->vm_start) | |
1383 | ri = vma->vm_file->private_data; | |
1384 | ||
1385 | up_read(¤t->mm->mmap_sem); | |
1386 | ||
1387 | if (!ri) { | |
1388 | /* On POWER7, use VRMA; on PPC970, give up */ | |
1389 | err = -EPERM; | |
1390 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { | |
1391 | pr_err("KVM: CPU requires an RMO\n"); | |
1392 | goto out; | |
1393 | } | |
1394 | ||
da9d1d7f PM |
1395 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
1396 | err = -EINVAL; | |
1397 | if (!(psize == 0x1000 || psize == 0x10000 || | |
1398 | psize == 0x1000000)) | |
1399 | goto out; | |
1400 | ||
c77162de | 1401 | /* Update VRMASD field in the LPCR */ |
da9d1d7f | 1402 | senc = slb_pgsize_encoding(psize); |
697d3899 PM |
1403 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | |
1404 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
da9d1d7f PM |
1405 | lpcr = kvm->arch.lpcr & ~LPCR_VRMASD; |
1406 | lpcr |= senc << (LPCR_VRMASD_SH - 4); | |
c77162de PM |
1407 | kvm->arch.lpcr = lpcr; |
1408 | ||
1409 | /* Create HPTEs in the hash page table for the VRMA */ | |
da9d1d7f | 1410 | kvmppc_map_vrma(vcpu, memslot, porder); |
c77162de PM |
1411 | |
1412 | } else { | |
1413 | /* Set up to use an RMO region */ | |
1414 | rma_size = ri->npages; | |
1415 | if (rma_size > memslot->npages) | |
1416 | rma_size = memslot->npages; | |
1417 | rma_size <<= PAGE_SHIFT; | |
aa04b4cc | 1418 | rmls = lpcr_rmls(rma_size); |
c77162de | 1419 | err = -EINVAL; |
aa04b4cc | 1420 | if (rmls < 0) { |
c77162de PM |
1421 | pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size); |
1422 | goto out; | |
aa04b4cc PM |
1423 | } |
1424 | atomic_inc(&ri->use_count); | |
1425 | kvm->arch.rma = ri; | |
9e368f29 PM |
1426 | |
1427 | /* Update LPCR and RMOR */ | |
1428 | lpcr = kvm->arch.lpcr; | |
1429 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { | |
1430 | /* PPC970; insert RMLS value (split field) in HID4 */ | |
1431 | lpcr &= ~((1ul << HID4_RMLS0_SH) | | |
1432 | (3ul << HID4_RMLS2_SH)); | |
1433 | lpcr |= ((rmls >> 2) << HID4_RMLS0_SH) | | |
1434 | ((rmls & 3) << HID4_RMLS2_SH); | |
1435 | /* RMOR is also in HID4 */ | |
1436 | lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff) | |
1437 | << HID4_RMOR_SH; | |
1438 | } else { | |
1439 | /* POWER7 */ | |
1440 | lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L); | |
1441 | lpcr |= rmls << LPCR_RMLS_SH; | |
1442 | kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT; | |
1443 | } | |
aa04b4cc | 1444 | kvm->arch.lpcr = lpcr; |
c77162de | 1445 | pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n", |
aa04b4cc | 1446 | ri->base_pfn << PAGE_SHIFT, rma_size, lpcr); |
aa04b4cc | 1447 | |
c77162de | 1448 | /* Initialize phys addrs of pages in RMO */ |
da9d1d7f PM |
1449 | npages = ri->npages; |
1450 | porder = __ilog2(npages); | |
c77162de PM |
1451 | physp = kvm->arch.slot_phys[memslot->id]; |
1452 | spin_lock(&kvm->arch.slot_phys_lock); | |
1453 | for (i = 0; i < npages; ++i) | |
da9d1d7f | 1454 | physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + porder; |
c77162de | 1455 | spin_unlock(&kvm->arch.slot_phys_lock); |
aa04b4cc PM |
1456 | } |
1457 | ||
c77162de PM |
1458 | /* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */ |
1459 | smp_wmb(); | |
1460 | kvm->arch.rma_setup_done = 1; | |
1461 | err = 0; | |
1462 | out: | |
1463 | mutex_unlock(&kvm->lock); | |
1464 | return err; | |
b2b2f165 | 1465 | |
c77162de PM |
1466 | up_out: |
1467 | up_read(¤t->mm->mmap_sem); | |
1468 | goto out; | |
de56a948 PM |
1469 | } |
1470 | ||
1471 | int kvmppc_core_init_vm(struct kvm *kvm) | |
1472 | { | |
1473 | long r; | |
aa04b4cc | 1474 | unsigned long lpcr; |
de56a948 PM |
1475 | |
1476 | /* Allocate hashed page table */ | |
1477 | r = kvmppc_alloc_hpt(kvm); | |
54738c09 DG |
1478 | if (r) |
1479 | return r; | |
de56a948 | 1480 | |
54738c09 | 1481 | INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables); |
aa04b4cc | 1482 | |
aa04b4cc | 1483 | kvm->arch.rma = NULL; |
aa04b4cc | 1484 | |
9e368f29 | 1485 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
aa04b4cc | 1486 | |
9e368f29 PM |
1487 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
1488 | /* PPC970; HID4 is effectively the LPCR */ | |
1489 | unsigned long lpid = kvm->arch.lpid; | |
1490 | kvm->arch.host_lpid = 0; | |
1491 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4); | |
1492 | lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH)); | |
1493 | lpcr |= ((lpid >> 4) << HID4_LPID1_SH) | | |
1494 | ((lpid & 0xf) << HID4_LPID5_SH); | |
1495 | } else { | |
1496 | /* POWER7; init LPCR for virtual RMA mode */ | |
1497 | kvm->arch.host_lpid = mfspr(SPRN_LPID); | |
1498 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); | |
1499 | lpcr &= LPCR_PECE | LPCR_LPES; | |
1500 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | | |
697d3899 PM |
1501 | LPCR_VPM0 | LPCR_VPM1; |
1502 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | | |
1503 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
9e368f29 PM |
1504 | } |
1505 | kvm->arch.lpcr = lpcr; | |
aa04b4cc | 1506 | |
342d3db7 | 1507 | kvm->arch.using_mmu_notifiers = !!cpu_has_feature(CPU_FTR_ARCH_206); |
c77162de | 1508 | spin_lock_init(&kvm->arch.slot_phys_lock); |
54738c09 | 1509 | return 0; |
de56a948 PM |
1510 | } |
1511 | ||
1512 | void kvmppc_core_destroy_vm(struct kvm *kvm) | |
1513 | { | |
aa04b4cc PM |
1514 | unsigned long i; |
1515 | ||
342d3db7 PM |
1516 | if (!kvm->arch.using_mmu_notifiers) |
1517 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) | |
1518 | unpin_slot(kvm, i); | |
b2b2f165 | 1519 | |
aa04b4cc PM |
1520 | if (kvm->arch.rma) { |
1521 | kvm_release_rma(kvm->arch.rma); | |
1522 | kvm->arch.rma = NULL; | |
1523 | } | |
1524 | ||
de56a948 | 1525 | kvmppc_free_hpt(kvm); |
54738c09 | 1526 | WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables)); |
de56a948 PM |
1527 | } |
1528 | ||
1529 | /* These are stubs for now */ | |
1530 | void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end) | |
1531 | { | |
1532 | } | |
1533 | ||
1534 | /* We don't need to emulate any privileged instructions or dcbz */ | |
1535 | int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
1536 | unsigned int inst, int *advance) | |
1537 | { | |
1538 | return EMULATE_FAIL; | |
1539 | } | |
1540 | ||
1541 | int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs) | |
1542 | { | |
1543 | return EMULATE_FAIL; | |
1544 | } | |
1545 | ||
1546 | int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt) | |
1547 | { | |
1548 | return EMULATE_FAIL; | |
1549 | } | |
1550 | ||
1551 | static int kvmppc_book3s_hv_init(void) | |
1552 | { | |
1553 | int r; | |
1554 | ||
1555 | r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
1556 | ||
1557 | if (r) | |
1558 | return r; | |
1559 | ||
1560 | r = kvmppc_mmu_hv_init(); | |
1561 | ||
1562 | return r; | |
1563 | } | |
1564 | ||
1565 | static void kvmppc_book3s_hv_exit(void) | |
1566 | { | |
1567 | kvm_exit(); | |
1568 | } | |
1569 | ||
1570 | module_init(kvmppc_book3s_hv_init); | |
1571 | module_exit(kvmppc_book3s_hv_exit); |