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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> | |
2c9097e4 | 33 | #include <linux/srcu.h> |
de56a948 PM |
34 | |
35 | #include <asm/reg.h> | |
36 | #include <asm/cputable.h> | |
37 | #include <asm/cacheflush.h> | |
38 | #include <asm/tlbflush.h> | |
39 | #include <asm/uaccess.h> | |
40 | #include <asm/io.h> | |
41 | #include <asm/kvm_ppc.h> | |
42 | #include <asm/kvm_book3s.h> | |
43 | #include <asm/mmu_context.h> | |
44 | #include <asm/lppaca.h> | |
45 | #include <asm/processor.h> | |
371fefd6 | 46 | #include <asm/cputhreads.h> |
aa04b4cc | 47 | #include <asm/page.h> |
de1d9248 | 48 | #include <asm/hvcall.h> |
ae3a197e | 49 | #include <asm/switch_to.h> |
512691d4 | 50 | #include <asm/smp.h> |
de56a948 | 51 | #include <linux/gfp.h> |
de56a948 PM |
52 | #include <linux/vmalloc.h> |
53 | #include <linux/highmem.h> | |
c77162de | 54 | #include <linux/hugetlb.h> |
de56a948 PM |
55 | |
56 | /* #define EXIT_DEBUG */ | |
57 | /* #define EXIT_DEBUG_SIMPLE */ | |
58 | /* #define EXIT_DEBUG_INT */ | |
59 | ||
913d3ff9 PM |
60 | /* Used to indicate that a guest page fault needs to be handled */ |
61 | #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1) | |
62 | ||
c7b67670 PM |
63 | /* Used as a "null" value for timebase values */ |
64 | #define TB_NIL (~(u64)0) | |
65 | ||
19ccb76a | 66 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
32fad281 | 67 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
19ccb76a | 68 | |
c7b67670 PM |
69 | /* |
70 | * We use the vcpu_load/put functions to measure stolen time. | |
71 | * Stolen time is counted as time when either the vcpu is able to | |
72 | * run as part of a virtual core, but the task running the vcore | |
73 | * is preempted or sleeping, or when the vcpu needs something done | |
74 | * in the kernel by the task running the vcpu, but that task is | |
75 | * preempted or sleeping. Those two things have to be counted | |
76 | * separately, since one of the vcpu tasks will take on the job | |
77 | * of running the core, and the other vcpu tasks in the vcore will | |
78 | * sleep waiting for it to do that, but that sleep shouldn't count | |
79 | * as stolen time. | |
80 | * | |
81 | * Hence we accumulate stolen time when the vcpu can run as part of | |
82 | * a vcore using vc->stolen_tb, and the stolen time when the vcpu | |
83 | * needs its task to do other things in the kernel (for example, | |
84 | * service a page fault) in busy_stolen. We don't accumulate | |
85 | * stolen time for a vcore when it is inactive, or for a vcpu | |
86 | * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of | |
87 | * a misnomer; it means that the vcpu task is not executing in | |
88 | * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in | |
89 | * the kernel. We don't have any way of dividing up that time | |
90 | * between time that the vcpu is genuinely stopped, time that | |
91 | * the task is actively working on behalf of the vcpu, and time | |
92 | * that the task is preempted, so we don't count any of it as | |
93 | * stolen. | |
94 | * | |
95 | * Updates to busy_stolen are protected by arch.tbacct_lock; | |
96 | * updates to vc->stolen_tb are protected by the arch.tbacct_lock | |
97 | * of the vcpu that has taken responsibility for running the vcore | |
98 | * (i.e. vc->runner). The stolen times are measured in units of | |
99 | * timebase ticks. (Note that the != TB_NIL checks below are | |
100 | * purely defensive; they should never fail.) | |
101 | */ | |
102 | ||
de56a948 PM |
103 | void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
104 | { | |
0456ec4f PM |
105 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
106 | ||
c7b67670 PM |
107 | spin_lock(&vcpu->arch.tbacct_lock); |
108 | if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE && | |
109 | vc->preempt_tb != TB_NIL) { | |
0456ec4f | 110 | vc->stolen_tb += mftb() - vc->preempt_tb; |
c7b67670 PM |
111 | vc->preempt_tb = TB_NIL; |
112 | } | |
113 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && | |
114 | vcpu->arch.busy_preempt != TB_NIL) { | |
115 | vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt; | |
116 | vcpu->arch.busy_preempt = TB_NIL; | |
117 | } | |
118 | spin_unlock(&vcpu->arch.tbacct_lock); | |
de56a948 PM |
119 | } |
120 | ||
121 | void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) | |
122 | { | |
0456ec4f PM |
123 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
124 | ||
c7b67670 | 125 | spin_lock(&vcpu->arch.tbacct_lock); |
0456ec4f PM |
126 | if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) |
127 | vc->preempt_tb = mftb(); | |
c7b67670 PM |
128 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
129 | vcpu->arch.busy_preempt = mftb(); | |
130 | spin_unlock(&vcpu->arch.tbacct_lock); | |
de56a948 PM |
131 | } |
132 | ||
de56a948 PM |
133 | void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr) |
134 | { | |
135 | vcpu->arch.shregs.msr = msr; | |
19ccb76a | 136 | kvmppc_end_cede(vcpu); |
de56a948 PM |
137 | } |
138 | ||
139 | void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr) | |
140 | { | |
141 | vcpu->arch.pvr = pvr; | |
142 | } | |
143 | ||
144 | void kvmppc_dump_regs(struct kvm_vcpu *vcpu) | |
145 | { | |
146 | int r; | |
147 | ||
148 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); | |
149 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", | |
150 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); | |
151 | for (r = 0; r < 16; ++r) | |
152 | pr_err("r%2d = %.16lx r%d = %.16lx\n", | |
153 | r, kvmppc_get_gpr(vcpu, r), | |
154 | r+16, kvmppc_get_gpr(vcpu, r+16)); | |
155 | pr_err("ctr = %.16lx lr = %.16lx\n", | |
156 | vcpu->arch.ctr, vcpu->arch.lr); | |
157 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", | |
158 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); | |
159 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", | |
160 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); | |
161 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", | |
162 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); | |
163 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", | |
164 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); | |
165 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); | |
166 | pr_err("fault dar = %.16lx dsisr = %.8x\n", | |
167 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
168 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); | |
169 | for (r = 0; r < vcpu->arch.slb_max; ++r) | |
170 | pr_err(" ESID = %.16llx VSID = %.16llx\n", | |
171 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); | |
172 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", | |
aa04b4cc | 173 | vcpu->kvm->arch.lpcr, vcpu->kvm->arch.sdr1, |
de56a948 PM |
174 | vcpu->arch.last_inst); |
175 | } | |
176 | ||
a8606e20 PM |
177 | struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
178 | { | |
179 | int r; | |
180 | struct kvm_vcpu *v, *ret = NULL; | |
181 | ||
182 | mutex_lock(&kvm->lock); | |
183 | kvm_for_each_vcpu(r, v, kvm) { | |
184 | if (v->vcpu_id == id) { | |
185 | ret = v; | |
186 | break; | |
187 | } | |
188 | } | |
189 | mutex_unlock(&kvm->lock); | |
190 | return ret; | |
191 | } | |
192 | ||
193 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) | |
194 | { | |
195 | vpa->shared_proc = 1; | |
196 | vpa->yield_count = 1; | |
197 | } | |
198 | ||
55b665b0 PM |
199 | static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, |
200 | unsigned long addr, unsigned long len) | |
201 | { | |
202 | /* check address is cacheline aligned */ | |
203 | if (addr & (L1_CACHE_BYTES - 1)) | |
204 | return -EINVAL; | |
205 | spin_lock(&vcpu->arch.vpa_update_lock); | |
206 | if (v->next_gpa != addr || v->len != len) { | |
207 | v->next_gpa = addr; | |
208 | v->len = addr ? len : 0; | |
209 | v->update_pending = 1; | |
210 | } | |
211 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
212 | return 0; | |
213 | } | |
214 | ||
2e25aa5f PM |
215 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
216 | struct reg_vpa { | |
217 | u32 dummy; | |
218 | union { | |
219 | u16 hword; | |
220 | u32 word; | |
221 | } length; | |
222 | }; | |
223 | ||
224 | static int vpa_is_registered(struct kvmppc_vpa *vpap) | |
225 | { | |
226 | if (vpap->update_pending) | |
227 | return vpap->next_gpa != 0; | |
228 | return vpap->pinned_addr != NULL; | |
229 | } | |
230 | ||
a8606e20 PM |
231 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
232 | unsigned long flags, | |
233 | unsigned long vcpuid, unsigned long vpa) | |
234 | { | |
235 | struct kvm *kvm = vcpu->kvm; | |
93e60249 | 236 | unsigned long len, nb; |
a8606e20 PM |
237 | void *va; |
238 | struct kvm_vcpu *tvcpu; | |
2e25aa5f PM |
239 | int err; |
240 | int subfunc; | |
241 | struct kvmppc_vpa *vpap; | |
a8606e20 PM |
242 | |
243 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); | |
244 | if (!tvcpu) | |
245 | return H_PARAMETER; | |
246 | ||
2e25aa5f PM |
247 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
248 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || | |
249 | subfunc == H_VPA_REG_SLB) { | |
250 | /* Registering new area - address must be cache-line aligned */ | |
251 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) | |
a8606e20 | 252 | return H_PARAMETER; |
2e25aa5f PM |
253 | |
254 | /* convert logical addr to kernel addr and read length */ | |
93e60249 PM |
255 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
256 | if (va == NULL) | |
b2b2f165 | 257 | return H_PARAMETER; |
2e25aa5f PM |
258 | if (subfunc == H_VPA_REG_VPA) |
259 | len = ((struct reg_vpa *)va)->length.hword; | |
a8606e20 | 260 | else |
2e25aa5f PM |
261 | len = ((struct reg_vpa *)va)->length.word; |
262 | kvmppc_unpin_guest_page(kvm, va); | |
263 | ||
264 | /* Check length */ | |
265 | if (len > nb || len < sizeof(struct reg_vpa)) | |
266 | return H_PARAMETER; | |
267 | } else { | |
268 | vpa = 0; | |
269 | len = 0; | |
270 | } | |
271 | ||
272 | err = H_PARAMETER; | |
273 | vpap = NULL; | |
274 | spin_lock(&tvcpu->arch.vpa_update_lock); | |
275 | ||
276 | switch (subfunc) { | |
277 | case H_VPA_REG_VPA: /* register VPA */ | |
278 | if (len < sizeof(struct lppaca)) | |
a8606e20 | 279 | break; |
2e25aa5f PM |
280 | vpap = &tvcpu->arch.vpa; |
281 | err = 0; | |
282 | break; | |
283 | ||
284 | case H_VPA_REG_DTL: /* register DTL */ | |
285 | if (len < sizeof(struct dtl_entry)) | |
a8606e20 | 286 | break; |
2e25aa5f PM |
287 | len -= len % sizeof(struct dtl_entry); |
288 | ||
289 | /* Check that they have previously registered a VPA */ | |
290 | err = H_RESOURCE; | |
291 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 292 | break; |
2e25aa5f PM |
293 | |
294 | vpap = &tvcpu->arch.dtl; | |
295 | err = 0; | |
296 | break; | |
297 | ||
298 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ | |
299 | /* Check that they have previously registered a VPA */ | |
300 | err = H_RESOURCE; | |
301 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 302 | break; |
2e25aa5f PM |
303 | |
304 | vpap = &tvcpu->arch.slb_shadow; | |
305 | err = 0; | |
306 | break; | |
307 | ||
308 | case H_VPA_DEREG_VPA: /* deregister VPA */ | |
309 | /* Check they don't still have a DTL or SLB buf registered */ | |
310 | err = H_RESOURCE; | |
311 | if (vpa_is_registered(&tvcpu->arch.dtl) || | |
312 | vpa_is_registered(&tvcpu->arch.slb_shadow)) | |
a8606e20 | 313 | break; |
2e25aa5f PM |
314 | |
315 | vpap = &tvcpu->arch.vpa; | |
316 | err = 0; | |
317 | break; | |
318 | ||
319 | case H_VPA_DEREG_DTL: /* deregister DTL */ | |
320 | vpap = &tvcpu->arch.dtl; | |
321 | err = 0; | |
322 | break; | |
323 | ||
324 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ | |
325 | vpap = &tvcpu->arch.slb_shadow; | |
326 | err = 0; | |
327 | break; | |
328 | } | |
329 | ||
330 | if (vpap) { | |
331 | vpap->next_gpa = vpa; | |
332 | vpap->len = len; | |
333 | vpap->update_pending = 1; | |
a8606e20 | 334 | } |
93e60249 | 335 | |
2e25aa5f PM |
336 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
337 | ||
93e60249 | 338 | return err; |
a8606e20 PM |
339 | } |
340 | ||
081f323b | 341 | static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap) |
2e25aa5f | 342 | { |
081f323b | 343 | struct kvm *kvm = vcpu->kvm; |
2e25aa5f PM |
344 | void *va; |
345 | unsigned long nb; | |
081f323b | 346 | unsigned long gpa; |
2e25aa5f | 347 | |
081f323b PM |
348 | /* |
349 | * We need to pin the page pointed to by vpap->next_gpa, | |
350 | * but we can't call kvmppc_pin_guest_page under the lock | |
351 | * as it does get_user_pages() and down_read(). So we | |
352 | * have to drop the lock, pin the page, then get the lock | |
353 | * again and check that a new area didn't get registered | |
354 | * in the meantime. | |
355 | */ | |
356 | for (;;) { | |
357 | gpa = vpap->next_gpa; | |
358 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
359 | va = NULL; | |
360 | nb = 0; | |
361 | if (gpa) | |
362 | va = kvmppc_pin_guest_page(kvm, vpap->next_gpa, &nb); | |
363 | spin_lock(&vcpu->arch.vpa_update_lock); | |
364 | if (gpa == vpap->next_gpa) | |
365 | break; | |
366 | /* sigh... unpin that one and try again */ | |
367 | if (va) | |
2e25aa5f | 368 | kvmppc_unpin_guest_page(kvm, va); |
081f323b PM |
369 | } |
370 | ||
371 | vpap->update_pending = 0; | |
372 | if (va && nb < vpap->len) { | |
373 | /* | |
374 | * If it's now too short, it must be that userspace | |
375 | * has changed the mappings underlying guest memory, | |
376 | * so unregister the region. | |
377 | */ | |
378 | kvmppc_unpin_guest_page(kvm, va); | |
379 | va = NULL; | |
2e25aa5f PM |
380 | } |
381 | if (vpap->pinned_addr) | |
382 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr); | |
383 | vpap->pinned_addr = va; | |
384 | if (va) | |
385 | vpap->pinned_end = va + vpap->len; | |
386 | } | |
387 | ||
388 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) | |
389 | { | |
2f12f034 PM |
390 | if (!(vcpu->arch.vpa.update_pending || |
391 | vcpu->arch.slb_shadow.update_pending || | |
392 | vcpu->arch.dtl.update_pending)) | |
393 | return; | |
394 | ||
2e25aa5f PM |
395 | spin_lock(&vcpu->arch.vpa_update_lock); |
396 | if (vcpu->arch.vpa.update_pending) { | |
081f323b | 397 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); |
55b665b0 PM |
398 | if (vcpu->arch.vpa.pinned_addr) |
399 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); | |
2e25aa5f PM |
400 | } |
401 | if (vcpu->arch.dtl.update_pending) { | |
081f323b | 402 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); |
2e25aa5f PM |
403 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
404 | vcpu->arch.dtl_index = 0; | |
405 | } | |
406 | if (vcpu->arch.slb_shadow.update_pending) | |
081f323b | 407 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); |
2e25aa5f PM |
408 | spin_unlock(&vcpu->arch.vpa_update_lock); |
409 | } | |
410 | ||
c7b67670 PM |
411 | /* |
412 | * Return the accumulated stolen time for the vcore up until `now'. | |
413 | * The caller should hold the vcore lock. | |
414 | */ | |
415 | static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) | |
416 | { | |
417 | u64 p; | |
418 | ||
419 | /* | |
420 | * If we are the task running the vcore, then since we hold | |
421 | * the vcore lock, we can't be preempted, so stolen_tb/preempt_tb | |
422 | * can't be updated, so we don't need the tbacct_lock. | |
423 | * If the vcore is inactive, it can't become active (since we | |
424 | * hold the vcore lock), so the vcpu load/put functions won't | |
425 | * update stolen_tb/preempt_tb, and we don't need tbacct_lock. | |
426 | */ | |
427 | if (vc->vcore_state != VCORE_INACTIVE && | |
428 | vc->runner->arch.run_task != current) { | |
429 | spin_lock(&vc->runner->arch.tbacct_lock); | |
430 | p = vc->stolen_tb; | |
431 | if (vc->preempt_tb != TB_NIL) | |
432 | p += now - vc->preempt_tb; | |
433 | spin_unlock(&vc->runner->arch.tbacct_lock); | |
434 | } else { | |
435 | p = vc->stolen_tb; | |
436 | } | |
437 | return p; | |
438 | } | |
439 | ||
0456ec4f PM |
440 | static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
441 | struct kvmppc_vcore *vc) | |
442 | { | |
443 | struct dtl_entry *dt; | |
444 | struct lppaca *vpa; | |
c7b67670 PM |
445 | unsigned long stolen; |
446 | unsigned long core_stolen; | |
447 | u64 now; | |
0456ec4f PM |
448 | |
449 | dt = vcpu->arch.dtl_ptr; | |
450 | vpa = vcpu->arch.vpa.pinned_addr; | |
c7b67670 PM |
451 | now = mftb(); |
452 | core_stolen = vcore_stolen_time(vc, now); | |
453 | stolen = core_stolen - vcpu->arch.stolen_logged; | |
454 | vcpu->arch.stolen_logged = core_stolen; | |
455 | spin_lock(&vcpu->arch.tbacct_lock); | |
456 | stolen += vcpu->arch.busy_stolen; | |
457 | vcpu->arch.busy_stolen = 0; | |
458 | spin_unlock(&vcpu->arch.tbacct_lock); | |
0456ec4f PM |
459 | if (!dt || !vpa) |
460 | return; | |
461 | memset(dt, 0, sizeof(struct dtl_entry)); | |
462 | dt->dispatch_reason = 7; | |
463 | dt->processor_id = vc->pcpu + vcpu->arch.ptid; | |
c7b67670 PM |
464 | dt->timebase = now; |
465 | dt->enqueue_to_dispatch_time = stolen; | |
0456ec4f PM |
466 | dt->srr0 = kvmppc_get_pc(vcpu); |
467 | dt->srr1 = vcpu->arch.shregs.msr; | |
468 | ++dt; | |
469 | if (dt == vcpu->arch.dtl.pinned_end) | |
470 | dt = vcpu->arch.dtl.pinned_addr; | |
471 | vcpu->arch.dtl_ptr = dt; | |
472 | /* order writing *dt vs. writing vpa->dtl_idx */ | |
473 | smp_wmb(); | |
474 | vpa->dtl_idx = ++vcpu->arch.dtl_index; | |
475 | } | |
476 | ||
a8606e20 PM |
477 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
478 | { | |
479 | unsigned long req = kvmppc_get_gpr(vcpu, 3); | |
480 | unsigned long target, ret = H_SUCCESS; | |
481 | struct kvm_vcpu *tvcpu; | |
2c9097e4 | 482 | int idx; |
a8606e20 PM |
483 | |
484 | switch (req) { | |
c77162de | 485 | case H_ENTER: |
2c9097e4 | 486 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
c77162de PM |
487 | ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4), |
488 | kvmppc_get_gpr(vcpu, 5), | |
489 | kvmppc_get_gpr(vcpu, 6), | |
490 | kvmppc_get_gpr(vcpu, 7)); | |
2c9097e4 | 491 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
c77162de | 492 | break; |
a8606e20 | 493 | case H_CEDE: |
a8606e20 PM |
494 | break; |
495 | case H_PROD: | |
496 | target = kvmppc_get_gpr(vcpu, 4); | |
497 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
498 | if (!tvcpu) { | |
499 | ret = H_PARAMETER; | |
500 | break; | |
501 | } | |
502 | tvcpu->arch.prodded = 1; | |
503 | smp_mb(); | |
504 | if (vcpu->arch.ceded) { | |
505 | if (waitqueue_active(&vcpu->wq)) { | |
506 | wake_up_interruptible(&vcpu->wq); | |
507 | vcpu->stat.halt_wakeup++; | |
508 | } | |
509 | } | |
510 | break; | |
511 | case H_CONFER: | |
512 | break; | |
513 | case H_REGISTER_VPA: | |
514 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), | |
515 | kvmppc_get_gpr(vcpu, 5), | |
516 | kvmppc_get_gpr(vcpu, 6)); | |
517 | break; | |
518 | default: | |
519 | return RESUME_HOST; | |
520 | } | |
521 | kvmppc_set_gpr(vcpu, 3, ret); | |
522 | vcpu->arch.hcall_needed = 0; | |
523 | return RESUME_GUEST; | |
524 | } | |
525 | ||
de56a948 PM |
526 | static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, |
527 | struct task_struct *tsk) | |
528 | { | |
529 | int r = RESUME_HOST; | |
530 | ||
531 | vcpu->stat.sum_exits++; | |
532 | ||
533 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
534 | run->ready_for_interrupt_injection = 1; | |
535 | switch (vcpu->arch.trap) { | |
536 | /* We're good on these - the host merely wanted to get our attention */ | |
537 | case BOOK3S_INTERRUPT_HV_DECREMENTER: | |
538 | vcpu->stat.dec_exits++; | |
539 | r = RESUME_GUEST; | |
540 | break; | |
541 | case BOOK3S_INTERRUPT_EXTERNAL: | |
542 | vcpu->stat.ext_intr_exits++; | |
543 | r = RESUME_GUEST; | |
544 | break; | |
545 | case BOOK3S_INTERRUPT_PERFMON: | |
546 | r = RESUME_GUEST; | |
547 | break; | |
548 | case BOOK3S_INTERRUPT_PROGRAM: | |
549 | { | |
550 | ulong flags; | |
551 | /* | |
552 | * Normally program interrupts are delivered directly | |
553 | * to the guest by the hardware, but we can get here | |
554 | * as a result of a hypervisor emulation interrupt | |
555 | * (e40) getting turned into a 700 by BML RTAS. | |
556 | */ | |
557 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; | |
558 | kvmppc_core_queue_program(vcpu, flags); | |
559 | r = RESUME_GUEST; | |
560 | break; | |
561 | } | |
562 | case BOOK3S_INTERRUPT_SYSCALL: | |
563 | { | |
564 | /* hcall - punt to userspace */ | |
565 | int i; | |
566 | ||
567 | if (vcpu->arch.shregs.msr & MSR_PR) { | |
568 | /* sc 1 from userspace - reflect to guest syscall */ | |
569 | kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_SYSCALL); | |
570 | r = RESUME_GUEST; | |
571 | break; | |
572 | } | |
573 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); | |
574 | for (i = 0; i < 9; ++i) | |
575 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); | |
576 | run->exit_reason = KVM_EXIT_PAPR_HCALL; | |
577 | vcpu->arch.hcall_needed = 1; | |
578 | r = RESUME_HOST; | |
579 | break; | |
580 | } | |
581 | /* | |
342d3db7 PM |
582 | * We get these next two if the guest accesses a page which it thinks |
583 | * it has mapped but which is not actually present, either because | |
584 | * it is for an emulated I/O device or because the corresonding | |
585 | * host page has been paged out. Any other HDSI/HISI interrupts | |
586 | * have been handled already. | |
de56a948 PM |
587 | */ |
588 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: | |
913d3ff9 | 589 | r = RESUME_PAGE_FAULT; |
de56a948 PM |
590 | break; |
591 | case BOOK3S_INTERRUPT_H_INST_STORAGE: | |
913d3ff9 PM |
592 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
593 | vcpu->arch.fault_dsisr = 0; | |
594 | r = RESUME_PAGE_FAULT; | |
de56a948 PM |
595 | break; |
596 | /* | |
597 | * This occurs if the guest executes an illegal instruction. | |
598 | * We just generate a program interrupt to the guest, since | |
599 | * we don't emulate any guest instructions at this stage. | |
600 | */ | |
601 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: | |
602 | kvmppc_core_queue_program(vcpu, 0x80000); | |
603 | r = RESUME_GUEST; | |
604 | break; | |
605 | default: | |
606 | kvmppc_dump_regs(vcpu); | |
607 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
608 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
609 | vcpu->arch.shregs.msr); | |
610 | r = RESUME_HOST; | |
611 | BUG(); | |
612 | break; | |
613 | } | |
614 | ||
de56a948 PM |
615 | return r; |
616 | } | |
617 | ||
618 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
619 | struct kvm_sregs *sregs) | |
620 | { | |
621 | int i; | |
622 | ||
623 | sregs->pvr = vcpu->arch.pvr; | |
624 | ||
625 | memset(sregs, 0, sizeof(struct kvm_sregs)); | |
626 | for (i = 0; i < vcpu->arch.slb_max; i++) { | |
627 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; | |
628 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; | |
629 | } | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
634 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
635 | struct kvm_sregs *sregs) | |
636 | { | |
637 | int i, j; | |
638 | ||
639 | kvmppc_set_pvr(vcpu, sregs->pvr); | |
640 | ||
641 | j = 0; | |
642 | for (i = 0; i < vcpu->arch.slb_nr; i++) { | |
643 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { | |
644 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; | |
645 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; | |
646 | ++j; | |
647 | } | |
648 | } | |
649 | vcpu->arch.slb_max = j; | |
650 | ||
651 | return 0; | |
652 | } | |
653 | ||
a136a8bd | 654 | int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val) |
31f3438e | 655 | { |
a136a8bd PM |
656 | int r = 0; |
657 | long int i; | |
31f3438e | 658 | |
a136a8bd | 659 | switch (id) { |
31f3438e | 660 | case KVM_REG_PPC_HIOR: |
a136a8bd PM |
661 | *val = get_reg_val(id, 0); |
662 | break; | |
663 | case KVM_REG_PPC_DABR: | |
664 | *val = get_reg_val(id, vcpu->arch.dabr); | |
665 | break; | |
666 | case KVM_REG_PPC_DSCR: | |
667 | *val = get_reg_val(id, vcpu->arch.dscr); | |
668 | break; | |
669 | case KVM_REG_PPC_PURR: | |
670 | *val = get_reg_val(id, vcpu->arch.purr); | |
671 | break; | |
672 | case KVM_REG_PPC_SPURR: | |
673 | *val = get_reg_val(id, vcpu->arch.spurr); | |
674 | break; | |
675 | case KVM_REG_PPC_AMR: | |
676 | *val = get_reg_val(id, vcpu->arch.amr); | |
677 | break; | |
678 | case KVM_REG_PPC_UAMOR: | |
679 | *val = get_reg_val(id, vcpu->arch.uamor); | |
680 | break; | |
681 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRA: | |
682 | i = id - KVM_REG_PPC_MMCR0; | |
683 | *val = get_reg_val(id, vcpu->arch.mmcr[i]); | |
684 | break; | |
685 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
686 | i = id - KVM_REG_PPC_PMC1; | |
687 | *val = get_reg_val(id, vcpu->arch.pmc[i]); | |
31f3438e | 688 | break; |
a8bd19ef PM |
689 | #ifdef CONFIG_VSX |
690 | case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: | |
691 | if (cpu_has_feature(CPU_FTR_VSX)) { | |
692 | /* VSX => FP reg i is stored in arch.vsr[2*i] */ | |
693 | long int i = id - KVM_REG_PPC_FPR0; | |
694 | *val = get_reg_val(id, vcpu->arch.vsr[2 * i]); | |
695 | } else { | |
696 | /* let generic code handle it */ | |
697 | r = -EINVAL; | |
698 | } | |
699 | break; | |
700 | case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: | |
701 | if (cpu_has_feature(CPU_FTR_VSX)) { | |
702 | long int i = id - KVM_REG_PPC_VSR0; | |
703 | val->vsxval[0] = vcpu->arch.vsr[2 * i]; | |
704 | val->vsxval[1] = vcpu->arch.vsr[2 * i + 1]; | |
705 | } else { | |
706 | r = -ENXIO; | |
707 | } | |
708 | break; | |
709 | #endif /* CONFIG_VSX */ | |
55b665b0 PM |
710 | case KVM_REG_PPC_VPA_ADDR: |
711 | spin_lock(&vcpu->arch.vpa_update_lock); | |
712 | *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); | |
713 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
714 | break; | |
715 | case KVM_REG_PPC_VPA_SLB: | |
716 | spin_lock(&vcpu->arch.vpa_update_lock); | |
717 | val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; | |
718 | val->vpaval.length = vcpu->arch.slb_shadow.len; | |
719 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
720 | break; | |
721 | case KVM_REG_PPC_VPA_DTL: | |
722 | spin_lock(&vcpu->arch.vpa_update_lock); | |
723 | val->vpaval.addr = vcpu->arch.dtl.next_gpa; | |
724 | val->vpaval.length = vcpu->arch.dtl.len; | |
725 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
726 | break; | |
31f3438e | 727 | default: |
a136a8bd | 728 | r = -EINVAL; |
31f3438e PM |
729 | break; |
730 | } | |
731 | ||
732 | return r; | |
733 | } | |
734 | ||
a136a8bd | 735 | int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val) |
31f3438e | 736 | { |
a136a8bd PM |
737 | int r = 0; |
738 | long int i; | |
55b665b0 | 739 | unsigned long addr, len; |
31f3438e | 740 | |
a136a8bd | 741 | switch (id) { |
31f3438e | 742 | case KVM_REG_PPC_HIOR: |
31f3438e | 743 | /* Only allow this to be set to zero */ |
a136a8bd | 744 | if (set_reg_val(id, *val)) |
31f3438e PM |
745 | r = -EINVAL; |
746 | break; | |
a136a8bd PM |
747 | case KVM_REG_PPC_DABR: |
748 | vcpu->arch.dabr = set_reg_val(id, *val); | |
749 | break; | |
750 | case KVM_REG_PPC_DSCR: | |
751 | vcpu->arch.dscr = set_reg_val(id, *val); | |
752 | break; | |
753 | case KVM_REG_PPC_PURR: | |
754 | vcpu->arch.purr = set_reg_val(id, *val); | |
755 | break; | |
756 | case KVM_REG_PPC_SPURR: | |
757 | vcpu->arch.spurr = set_reg_val(id, *val); | |
758 | break; | |
759 | case KVM_REG_PPC_AMR: | |
760 | vcpu->arch.amr = set_reg_val(id, *val); | |
761 | break; | |
762 | case KVM_REG_PPC_UAMOR: | |
763 | vcpu->arch.uamor = set_reg_val(id, *val); | |
764 | break; | |
765 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRA: | |
766 | i = id - KVM_REG_PPC_MMCR0; | |
767 | vcpu->arch.mmcr[i] = set_reg_val(id, *val); | |
768 | break; | |
769 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
770 | i = id - KVM_REG_PPC_PMC1; | |
771 | vcpu->arch.pmc[i] = set_reg_val(id, *val); | |
772 | break; | |
a8bd19ef PM |
773 | #ifdef CONFIG_VSX |
774 | case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: | |
775 | if (cpu_has_feature(CPU_FTR_VSX)) { | |
776 | /* VSX => FP reg i is stored in arch.vsr[2*i] */ | |
777 | long int i = id - KVM_REG_PPC_FPR0; | |
778 | vcpu->arch.vsr[2 * i] = set_reg_val(id, *val); | |
779 | } else { | |
780 | /* let generic code handle it */ | |
781 | r = -EINVAL; | |
782 | } | |
783 | break; | |
784 | case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31: | |
785 | if (cpu_has_feature(CPU_FTR_VSX)) { | |
786 | long int i = id - KVM_REG_PPC_VSR0; | |
787 | vcpu->arch.vsr[2 * i] = val->vsxval[0]; | |
788 | vcpu->arch.vsr[2 * i + 1] = val->vsxval[1]; | |
789 | } else { | |
790 | r = -ENXIO; | |
791 | } | |
792 | break; | |
793 | #endif /* CONFIG_VSX */ | |
55b665b0 PM |
794 | case KVM_REG_PPC_VPA_ADDR: |
795 | addr = set_reg_val(id, *val); | |
796 | r = -EINVAL; | |
797 | if (!addr && (vcpu->arch.slb_shadow.next_gpa || | |
798 | vcpu->arch.dtl.next_gpa)) | |
799 | break; | |
800 | r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); | |
801 | break; | |
802 | case KVM_REG_PPC_VPA_SLB: | |
803 | addr = val->vpaval.addr; | |
804 | len = val->vpaval.length; | |
805 | r = -EINVAL; | |
806 | if (addr && !vcpu->arch.vpa.next_gpa) | |
807 | break; | |
808 | r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); | |
809 | break; | |
810 | case KVM_REG_PPC_VPA_DTL: | |
811 | addr = val->vpaval.addr; | |
812 | len = val->vpaval.length; | |
813 | r = -EINVAL; | |
9f8c8c78 PM |
814 | if (addr && (len < sizeof(struct dtl_entry) || |
815 | !vcpu->arch.vpa.next_gpa)) | |
55b665b0 PM |
816 | break; |
817 | len -= len % sizeof(struct dtl_entry); | |
818 | r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); | |
819 | break; | |
31f3438e | 820 | default: |
a136a8bd | 821 | r = -EINVAL; |
31f3438e PM |
822 | break; |
823 | } | |
824 | ||
825 | return r; | |
826 | } | |
827 | ||
de56a948 PM |
828 | int kvmppc_core_check_processor_compat(void) |
829 | { | |
9e368f29 | 830 | if (cpu_has_feature(CPU_FTR_HVMODE)) |
de56a948 PM |
831 | return 0; |
832 | return -EIO; | |
833 | } | |
834 | ||
835 | struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) | |
836 | { | |
837 | struct kvm_vcpu *vcpu; | |
371fefd6 PM |
838 | int err = -EINVAL; |
839 | int core; | |
840 | struct kvmppc_vcore *vcore; | |
de56a948 | 841 | |
371fefd6 PM |
842 | core = id / threads_per_core; |
843 | if (core >= KVM_MAX_VCORES) | |
844 | goto out; | |
845 | ||
846 | err = -ENOMEM; | |
6b75e6bf | 847 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
de56a948 PM |
848 | if (!vcpu) |
849 | goto out; | |
850 | ||
851 | err = kvm_vcpu_init(vcpu, kvm, id); | |
852 | if (err) | |
853 | goto free_vcpu; | |
854 | ||
855 | vcpu->arch.shared = &vcpu->arch.shregs; | |
856 | vcpu->arch.last_cpu = -1; | |
857 | vcpu->arch.mmcr[0] = MMCR0_FC; | |
858 | vcpu->arch.ctrl = CTRL_RUNLATCH; | |
859 | /* default to host PVR, since we can't spoof it */ | |
860 | vcpu->arch.pvr = mfspr(SPRN_PVR); | |
861 | kvmppc_set_pvr(vcpu, vcpu->arch.pvr); | |
2e25aa5f | 862 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
c7b67670 PM |
863 | spin_lock_init(&vcpu->arch.tbacct_lock); |
864 | vcpu->arch.busy_preempt = TB_NIL; | |
de56a948 | 865 | |
de56a948 PM |
866 | kvmppc_mmu_book3s_hv_init(vcpu); |
867 | ||
8455d79e | 868 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
371fefd6 PM |
869 | |
870 | init_waitqueue_head(&vcpu->arch.cpu_run); | |
871 | ||
872 | mutex_lock(&kvm->lock); | |
873 | vcore = kvm->arch.vcores[core]; | |
874 | if (!vcore) { | |
875 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); | |
876 | if (vcore) { | |
877 | INIT_LIST_HEAD(&vcore->runnable_threads); | |
878 | spin_lock_init(&vcore->lock); | |
19ccb76a | 879 | init_waitqueue_head(&vcore->wq); |
c7b67670 | 880 | vcore->preempt_tb = TB_NIL; |
371fefd6 PM |
881 | } |
882 | kvm->arch.vcores[core] = vcore; | |
883 | } | |
884 | mutex_unlock(&kvm->lock); | |
885 | ||
886 | if (!vcore) | |
887 | goto free_vcpu; | |
888 | ||
889 | spin_lock(&vcore->lock); | |
890 | ++vcore->num_threads; | |
371fefd6 PM |
891 | spin_unlock(&vcore->lock); |
892 | vcpu->arch.vcore = vcore; | |
893 | ||
af8f38b3 AG |
894 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
895 | kvmppc_sanity_check(vcpu); | |
896 | ||
de56a948 PM |
897 | return vcpu; |
898 | ||
899 | free_vcpu: | |
6b75e6bf | 900 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
901 | out: |
902 | return ERR_PTR(err); | |
903 | } | |
904 | ||
905 | void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) | |
906 | { | |
2e25aa5f PM |
907 | spin_lock(&vcpu->arch.vpa_update_lock); |
908 | if (vcpu->arch.dtl.pinned_addr) | |
909 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.dtl.pinned_addr); | |
910 | if (vcpu->arch.slb_shadow.pinned_addr) | |
911 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.slb_shadow.pinned_addr); | |
912 | if (vcpu->arch.vpa.pinned_addr) | |
913 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.vpa.pinned_addr); | |
914 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
de56a948 | 915 | kvm_vcpu_uninit(vcpu); |
6b75e6bf | 916 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
917 | } |
918 | ||
19ccb76a | 919 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
371fefd6 | 920 | { |
19ccb76a | 921 | unsigned long dec_nsec, now; |
371fefd6 | 922 | |
19ccb76a PM |
923 | now = get_tb(); |
924 | if (now > vcpu->arch.dec_expires) { | |
925 | /* decrementer has already gone negative */ | |
926 | kvmppc_core_queue_dec(vcpu); | |
7e28e60e | 927 | kvmppc_core_prepare_to_enter(vcpu); |
19ccb76a | 928 | return; |
371fefd6 | 929 | } |
19ccb76a PM |
930 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
931 | / tb_ticks_per_sec; | |
932 | hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), | |
933 | HRTIMER_MODE_REL); | |
934 | vcpu->arch.timer_running = 1; | |
371fefd6 PM |
935 | } |
936 | ||
19ccb76a | 937 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
371fefd6 | 938 | { |
19ccb76a PM |
939 | vcpu->arch.ceded = 0; |
940 | if (vcpu->arch.timer_running) { | |
941 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
942 | vcpu->arch.timer_running = 0; | |
943 | } | |
371fefd6 PM |
944 | } |
945 | ||
de56a948 | 946 | extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); |
371fefd6 | 947 | extern void xics_wake_cpu(int cpu); |
de56a948 | 948 | |
371fefd6 PM |
949 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
950 | struct kvm_vcpu *vcpu) | |
de56a948 | 951 | { |
c7b67670 PM |
952 | u64 now; |
953 | ||
371fefd6 PM |
954 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
955 | return; | |
c7b67670 PM |
956 | spin_lock(&vcpu->arch.tbacct_lock); |
957 | now = mftb(); | |
958 | vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - | |
959 | vcpu->arch.stolen_logged; | |
960 | vcpu->arch.busy_preempt = now; | |
961 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; | |
962 | spin_unlock(&vcpu->arch.tbacct_lock); | |
371fefd6 | 963 | --vc->n_runnable; |
371fefd6 PM |
964 | list_del(&vcpu->arch.run_list); |
965 | } | |
966 | ||
f0888f70 PM |
967 | static int kvmppc_grab_hwthread(int cpu) |
968 | { | |
969 | struct paca_struct *tpaca; | |
970 | long timeout = 1000; | |
971 | ||
972 | tpaca = &paca[cpu]; | |
973 | ||
974 | /* Ensure the thread won't go into the kernel if it wakes */ | |
975 | tpaca->kvm_hstate.hwthread_req = 1; | |
7b444c67 | 976 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
f0888f70 PM |
977 | |
978 | /* | |
979 | * If the thread is already executing in the kernel (e.g. handling | |
980 | * a stray interrupt), wait for it to get back to nap mode. | |
981 | * The smp_mb() is to ensure that our setting of hwthread_req | |
982 | * is visible before we look at hwthread_state, so if this | |
983 | * races with the code at system_reset_pSeries and the thread | |
984 | * misses our setting of hwthread_req, we are sure to see its | |
985 | * setting of hwthread_state, and vice versa. | |
986 | */ | |
987 | smp_mb(); | |
988 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { | |
989 | if (--timeout <= 0) { | |
990 | pr_err("KVM: couldn't grab cpu %d\n", cpu); | |
991 | return -EBUSY; | |
992 | } | |
993 | udelay(1); | |
994 | } | |
995 | return 0; | |
996 | } | |
997 | ||
998 | static void kvmppc_release_hwthread(int cpu) | |
999 | { | |
1000 | struct paca_struct *tpaca; | |
1001 | ||
1002 | tpaca = &paca[cpu]; | |
1003 | tpaca->kvm_hstate.hwthread_req = 0; | |
1004 | tpaca->kvm_hstate.kvm_vcpu = NULL; | |
1005 | } | |
1006 | ||
371fefd6 PM |
1007 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu) |
1008 | { | |
1009 | int cpu; | |
1010 | struct paca_struct *tpaca; | |
1011 | struct kvmppc_vcore *vc = vcpu->arch.vcore; | |
1012 | ||
19ccb76a PM |
1013 | if (vcpu->arch.timer_running) { |
1014 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1015 | vcpu->arch.timer_running = 0; | |
1016 | } | |
371fefd6 PM |
1017 | cpu = vc->pcpu + vcpu->arch.ptid; |
1018 | tpaca = &paca[cpu]; | |
1019 | tpaca->kvm_hstate.kvm_vcpu = vcpu; | |
1020 | tpaca->kvm_hstate.kvm_vcore = vc; | |
19ccb76a PM |
1021 | tpaca->kvm_hstate.napping = 0; |
1022 | vcpu->cpu = vc->pcpu; | |
371fefd6 | 1023 | smp_wmb(); |
251da038 | 1024 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) |
371fefd6 | 1025 | if (vcpu->arch.ptid) { |
371fefd6 PM |
1026 | xics_wake_cpu(cpu); |
1027 | ++vc->n_woken; | |
de56a948 | 1028 | } |
371fefd6 PM |
1029 | #endif |
1030 | } | |
de56a948 | 1031 | |
371fefd6 PM |
1032 | static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc) |
1033 | { | |
1034 | int i; | |
1035 | ||
1036 | HMT_low(); | |
1037 | i = 0; | |
1038 | while (vc->nap_count < vc->n_woken) { | |
1039 | if (++i >= 1000000) { | |
1040 | pr_err("kvmppc_wait_for_nap timeout %d %d\n", | |
1041 | vc->nap_count, vc->n_woken); | |
1042 | break; | |
1043 | } | |
1044 | cpu_relax(); | |
1045 | } | |
1046 | HMT_medium(); | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * Check that we are on thread 0 and that any other threads in | |
7b444c67 PM |
1051 | * this core are off-line. Then grab the threads so they can't |
1052 | * enter the kernel. | |
371fefd6 PM |
1053 | */ |
1054 | static int on_primary_thread(void) | |
1055 | { | |
1056 | int cpu = smp_processor_id(); | |
1057 | int thr = cpu_thread_in_core(cpu); | |
1058 | ||
1059 | if (thr) | |
1060 | return 0; | |
1061 | while (++thr < threads_per_core) | |
1062 | if (cpu_online(cpu + thr)) | |
1063 | return 0; | |
7b444c67 PM |
1064 | |
1065 | /* Grab all hw threads so they can't go into the kernel */ | |
1066 | for (thr = 1; thr < threads_per_core; ++thr) { | |
1067 | if (kvmppc_grab_hwthread(cpu + thr)) { | |
1068 | /* Couldn't grab one; let the others go */ | |
1069 | do { | |
1070 | kvmppc_release_hwthread(cpu + thr); | |
1071 | } while (--thr > 0); | |
1072 | return 0; | |
1073 | } | |
1074 | } | |
371fefd6 PM |
1075 | return 1; |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * Run a set of guest threads on a physical core. | |
1080 | * Called with vc->lock held. | |
1081 | */ | |
913d3ff9 | 1082 | static void kvmppc_run_core(struct kvmppc_vcore *vc) |
371fefd6 | 1083 | { |
19ccb76a | 1084 | struct kvm_vcpu *vcpu, *vcpu0, *vnext; |
371fefd6 PM |
1085 | long ret; |
1086 | u64 now; | |
081f323b | 1087 | int ptid, i, need_vpa_update; |
2c9097e4 | 1088 | int srcu_idx; |
913d3ff9 | 1089 | struct kvm_vcpu *vcpus_to_update[threads_per_core]; |
371fefd6 PM |
1090 | |
1091 | /* don't start if any threads have a signal pending */ | |
081f323b PM |
1092 | need_vpa_update = 0; |
1093 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { | |
371fefd6 | 1094 | if (signal_pending(vcpu->arch.run_task)) |
913d3ff9 PM |
1095 | return; |
1096 | if (vcpu->arch.vpa.update_pending || | |
1097 | vcpu->arch.slb_shadow.update_pending || | |
1098 | vcpu->arch.dtl.update_pending) | |
1099 | vcpus_to_update[need_vpa_update++] = vcpu; | |
081f323b PM |
1100 | } |
1101 | ||
1102 | /* | |
1103 | * Initialize *vc, in particular vc->vcore_state, so we can | |
1104 | * drop the vcore lock if necessary. | |
1105 | */ | |
1106 | vc->n_woken = 0; | |
1107 | vc->nap_count = 0; | |
1108 | vc->entry_exit_count = 0; | |
2f12f034 | 1109 | vc->vcore_state = VCORE_STARTING; |
081f323b PM |
1110 | vc->in_guest = 0; |
1111 | vc->napping_threads = 0; | |
1112 | ||
1113 | /* | |
1114 | * Updating any of the vpas requires calling kvmppc_pin_guest_page, | |
1115 | * which can't be called with any spinlocks held. | |
1116 | */ | |
1117 | if (need_vpa_update) { | |
1118 | spin_unlock(&vc->lock); | |
913d3ff9 PM |
1119 | for (i = 0; i < need_vpa_update; ++i) |
1120 | kvmppc_update_vpas(vcpus_to_update[i]); | |
081f323b PM |
1121 | spin_lock(&vc->lock); |
1122 | } | |
de56a948 | 1123 | |
19ccb76a PM |
1124 | /* |
1125 | * Assign physical thread IDs, first to non-ceded vcpus | |
1126 | * and then to ceded ones. | |
1127 | */ | |
1128 | ptid = 0; | |
1129 | vcpu0 = NULL; | |
1130 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { | |
1131 | if (!vcpu->arch.ceded) { | |
1132 | if (!ptid) | |
1133 | vcpu0 = vcpu; | |
1134 | vcpu->arch.ptid = ptid++; | |
1135 | } | |
1136 | } | |
c7b67670 PM |
1137 | if (!vcpu0) |
1138 | goto out; /* nothing to run; should never happen */ | |
19ccb76a PM |
1139 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) |
1140 | if (vcpu->arch.ceded) | |
1141 | vcpu->arch.ptid = ptid++; | |
1142 | ||
7b444c67 PM |
1143 | /* |
1144 | * Make sure we are running on thread 0, and that | |
1145 | * secondary threads are offline. | |
1146 | */ | |
1147 | if (threads_per_core > 1 && !on_primary_thread()) { | |
1148 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
1149 | vcpu->arch.ret = -EBUSY; | |
1150 | goto out; | |
1151 | } | |
1152 | ||
371fefd6 | 1153 | vc->pcpu = smp_processor_id(); |
2e25aa5f | 1154 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
371fefd6 | 1155 | kvmppc_start_thread(vcpu); |
0456ec4f | 1156 | kvmppc_create_dtl_entry(vcpu, vc); |
2e25aa5f | 1157 | } |
371fefd6 | 1158 | |
2f12f034 | 1159 | vc->vcore_state = VCORE_RUNNING; |
19ccb76a | 1160 | preempt_disable(); |
371fefd6 | 1161 | spin_unlock(&vc->lock); |
de56a948 | 1162 | |
371fefd6 | 1163 | kvm_guest_enter(); |
2c9097e4 PM |
1164 | |
1165 | srcu_idx = srcu_read_lock(&vcpu0->kvm->srcu); | |
1166 | ||
19ccb76a | 1167 | __kvmppc_vcore_entry(NULL, vcpu0); |
de56a948 | 1168 | |
371fefd6 | 1169 | spin_lock(&vc->lock); |
19ccb76a PM |
1170 | /* disable sending of IPIs on virtual external irqs */ |
1171 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
1172 | vcpu->cpu = -1; | |
1173 | /* wait for secondary threads to finish writing their state to memory */ | |
371fefd6 PM |
1174 | if (vc->nap_count < vc->n_woken) |
1175 | kvmppc_wait_for_nap(vc); | |
2f12f034 PM |
1176 | for (i = 0; i < threads_per_core; ++i) |
1177 | kvmppc_release_hwthread(vc->pcpu + i); | |
371fefd6 | 1178 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
19ccb76a | 1179 | vc->vcore_state = VCORE_EXITING; |
371fefd6 PM |
1180 | spin_unlock(&vc->lock); |
1181 | ||
2c9097e4 PM |
1182 | srcu_read_unlock(&vcpu0->kvm->srcu, srcu_idx); |
1183 | ||
371fefd6 PM |
1184 | /* make sure updates to secondary vcpu structs are visible now */ |
1185 | smp_mb(); | |
de56a948 PM |
1186 | kvm_guest_exit(); |
1187 | ||
1188 | preempt_enable(); | |
1189 | kvm_resched(vcpu); | |
1190 | ||
913d3ff9 | 1191 | spin_lock(&vc->lock); |
de56a948 | 1192 | now = get_tb(); |
371fefd6 PM |
1193 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
1194 | /* cancel pending dec exception if dec is positive */ | |
1195 | if (now < vcpu->arch.dec_expires && | |
1196 | kvmppc_core_pending_dec(vcpu)) | |
1197 | kvmppc_core_dequeue_dec(vcpu); | |
19ccb76a PM |
1198 | |
1199 | ret = RESUME_GUEST; | |
1200 | if (vcpu->arch.trap) | |
1201 | ret = kvmppc_handle_exit(vcpu->arch.kvm_run, vcpu, | |
1202 | vcpu->arch.run_task); | |
1203 | ||
371fefd6 PM |
1204 | vcpu->arch.ret = ret; |
1205 | vcpu->arch.trap = 0; | |
19ccb76a PM |
1206 | |
1207 | if (vcpu->arch.ceded) { | |
1208 | if (ret != RESUME_GUEST) | |
1209 | kvmppc_end_cede(vcpu); | |
1210 | else | |
1211 | kvmppc_set_timer(vcpu); | |
1212 | } | |
371fefd6 | 1213 | } |
de56a948 PM |
1214 | |
1215 | out: | |
19ccb76a | 1216 | vc->vcore_state = VCORE_INACTIVE; |
371fefd6 PM |
1217 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, |
1218 | arch.run_list) { | |
1219 | if (vcpu->arch.ret != RESUME_GUEST) { | |
1220 | kvmppc_remove_runnable(vc, vcpu); | |
1221 | wake_up(&vcpu->arch.cpu_run); | |
1222 | } | |
1223 | } | |
371fefd6 PM |
1224 | } |
1225 | ||
19ccb76a PM |
1226 | /* |
1227 | * Wait for some other vcpu thread to execute us, and | |
1228 | * wake us up when we need to handle something in the host. | |
1229 | */ | |
1230 | static void kvmppc_wait_for_exec(struct kvm_vcpu *vcpu, int wait_state) | |
371fefd6 | 1231 | { |
371fefd6 PM |
1232 | DEFINE_WAIT(wait); |
1233 | ||
19ccb76a PM |
1234 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
1235 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) | |
1236 | schedule(); | |
1237 | finish_wait(&vcpu->arch.cpu_run, &wait); | |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * All the vcpus in this vcore are idle, so wait for a decrementer | |
1242 | * or external interrupt to one of the vcpus. vc->lock is held. | |
1243 | */ | |
1244 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) | |
1245 | { | |
1246 | DEFINE_WAIT(wait); | |
19ccb76a PM |
1247 | |
1248 | prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); | |
1249 | vc->vcore_state = VCORE_SLEEPING; | |
1250 | spin_unlock(&vc->lock); | |
913d3ff9 | 1251 | schedule(); |
19ccb76a PM |
1252 | finish_wait(&vc->wq, &wait); |
1253 | spin_lock(&vc->lock); | |
1254 | vc->vcore_state = VCORE_INACTIVE; | |
1255 | } | |
371fefd6 | 1256 | |
19ccb76a PM |
1257 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
1258 | { | |
1259 | int n_ceded; | |
19ccb76a PM |
1260 | struct kvmppc_vcore *vc; |
1261 | struct kvm_vcpu *v, *vn; | |
9e368f29 | 1262 | |
371fefd6 PM |
1263 | kvm_run->exit_reason = 0; |
1264 | vcpu->arch.ret = RESUME_GUEST; | |
1265 | vcpu->arch.trap = 0; | |
2f12f034 | 1266 | kvmppc_update_vpas(vcpu); |
371fefd6 | 1267 | |
371fefd6 PM |
1268 | /* |
1269 | * Synchronize with other threads in this virtual core | |
1270 | */ | |
1271 | vc = vcpu->arch.vcore; | |
1272 | spin_lock(&vc->lock); | |
19ccb76a | 1273 | vcpu->arch.ceded = 0; |
371fefd6 PM |
1274 | vcpu->arch.run_task = current; |
1275 | vcpu->arch.kvm_run = kvm_run; | |
c7b67670 | 1276 | vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); |
19ccb76a | 1277 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
c7b67670 | 1278 | vcpu->arch.busy_preempt = TB_NIL; |
371fefd6 PM |
1279 | list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads); |
1280 | ++vc->n_runnable; | |
1281 | ||
19ccb76a PM |
1282 | /* |
1283 | * This happens the first time this is called for a vcpu. | |
1284 | * If the vcore is already running, we may be able to start | |
1285 | * this thread straight away and have it join in. | |
1286 | */ | |
8455d79e | 1287 | if (!signal_pending(current)) { |
19ccb76a PM |
1288 | if (vc->vcore_state == VCORE_RUNNING && |
1289 | VCORE_EXIT_COUNT(vc) == 0) { | |
1290 | vcpu->arch.ptid = vc->n_runnable - 1; | |
2f12f034 | 1291 | kvmppc_create_dtl_entry(vcpu, vc); |
19ccb76a | 1292 | kvmppc_start_thread(vcpu); |
8455d79e PM |
1293 | } else if (vc->vcore_state == VCORE_SLEEPING) { |
1294 | wake_up(&vc->wq); | |
371fefd6 PM |
1295 | } |
1296 | ||
8455d79e | 1297 | } |
371fefd6 | 1298 | |
19ccb76a PM |
1299 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
1300 | !signal_pending(current)) { | |
8455d79e | 1301 | if (vc->vcore_state != VCORE_INACTIVE) { |
19ccb76a PM |
1302 | spin_unlock(&vc->lock); |
1303 | kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE); | |
1304 | spin_lock(&vc->lock); | |
1305 | continue; | |
1306 | } | |
19ccb76a PM |
1307 | list_for_each_entry_safe(v, vn, &vc->runnable_threads, |
1308 | arch.run_list) { | |
7e28e60e | 1309 | kvmppc_core_prepare_to_enter(v); |
19ccb76a PM |
1310 | if (signal_pending(v->arch.run_task)) { |
1311 | kvmppc_remove_runnable(vc, v); | |
1312 | v->stat.signal_exits++; | |
1313 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; | |
1314 | v->arch.ret = -EINTR; | |
1315 | wake_up(&v->arch.cpu_run); | |
1316 | } | |
1317 | } | |
8455d79e PM |
1318 | if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
1319 | break; | |
1320 | vc->runner = vcpu; | |
1321 | n_ceded = 0; | |
1322 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) | |
1323 | if (!v->arch.pending_exceptions) | |
1324 | n_ceded += v->arch.ceded; | |
1325 | if (n_ceded == vc->n_runnable) | |
1326 | kvmppc_vcore_blocked(vc); | |
1327 | else | |
1328 | kvmppc_run_core(vc); | |
0456ec4f | 1329 | vc->runner = NULL; |
19ccb76a | 1330 | } |
371fefd6 | 1331 | |
8455d79e PM |
1332 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
1333 | (vc->vcore_state == VCORE_RUNNING || | |
1334 | vc->vcore_state == VCORE_EXITING)) { | |
1335 | spin_unlock(&vc->lock); | |
1336 | kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE); | |
1337 | spin_lock(&vc->lock); | |
1338 | } | |
1339 | ||
1340 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { | |
1341 | kvmppc_remove_runnable(vc, vcpu); | |
1342 | vcpu->stat.signal_exits++; | |
1343 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
1344 | vcpu->arch.ret = -EINTR; | |
1345 | } | |
1346 | ||
1347 | if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { | |
1348 | /* Wake up some vcpu to run the core */ | |
1349 | v = list_first_entry(&vc->runnable_threads, | |
1350 | struct kvm_vcpu, arch.run_list); | |
1351 | wake_up(&v->arch.cpu_run); | |
371fefd6 PM |
1352 | } |
1353 | ||
371fefd6 | 1354 | spin_unlock(&vc->lock); |
371fefd6 | 1355 | return vcpu->arch.ret; |
de56a948 PM |
1356 | } |
1357 | ||
a8606e20 PM |
1358 | int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu) |
1359 | { | |
1360 | int r; | |
913d3ff9 | 1361 | int srcu_idx; |
a8606e20 | 1362 | |
af8f38b3 AG |
1363 | if (!vcpu->arch.sane) { |
1364 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
1365 | return -EINVAL; | |
1366 | } | |
1367 | ||
25051b5a SW |
1368 | kvmppc_core_prepare_to_enter(vcpu); |
1369 | ||
19ccb76a PM |
1370 | /* No need to go into the guest when all we'll do is come back out */ |
1371 | if (signal_pending(current)) { | |
1372 | run->exit_reason = KVM_EXIT_INTR; | |
1373 | return -EINTR; | |
1374 | } | |
1375 | ||
32fad281 PM |
1376 | atomic_inc(&vcpu->kvm->arch.vcpus_running); |
1377 | /* Order vcpus_running vs. rma_setup_done, see kvmppc_alloc_reset_hpt */ | |
1378 | smp_mb(); | |
1379 | ||
1380 | /* On the first time here, set up HTAB and VRMA or RMA */ | |
c77162de | 1381 | if (!vcpu->kvm->arch.rma_setup_done) { |
32fad281 | 1382 | r = kvmppc_hv_setup_htab_rma(vcpu); |
c77162de | 1383 | if (r) |
32fad281 | 1384 | goto out; |
c77162de | 1385 | } |
19ccb76a PM |
1386 | |
1387 | flush_fp_to_thread(current); | |
1388 | flush_altivec_to_thread(current); | |
1389 | flush_vsx_to_thread(current); | |
1390 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; | |
342d3db7 | 1391 | vcpu->arch.pgdir = current->mm->pgd; |
c7b67670 | 1392 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
19ccb76a | 1393 | |
a8606e20 PM |
1394 | do { |
1395 | r = kvmppc_run_vcpu(run, vcpu); | |
1396 | ||
1397 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && | |
1398 | !(vcpu->arch.shregs.msr & MSR_PR)) { | |
1399 | r = kvmppc_pseries_do_hcall(vcpu); | |
7e28e60e | 1400 | kvmppc_core_prepare_to_enter(vcpu); |
913d3ff9 PM |
1401 | } else if (r == RESUME_PAGE_FAULT) { |
1402 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
1403 | r = kvmppc_book3s_hv_page_fault(run, vcpu, | |
1404 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
1405 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
a8606e20 PM |
1406 | } |
1407 | } while (r == RESUME_GUEST); | |
32fad281 PM |
1408 | |
1409 | out: | |
c7b67670 | 1410 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
32fad281 | 1411 | atomic_dec(&vcpu->kvm->arch.vcpus_running); |
a8606e20 PM |
1412 | return r; |
1413 | } | |
1414 | ||
54738c09 | 1415 | |
aa04b4cc | 1416 | /* Work out RMLS (real mode limit selector) field value for a given RMA size. |
9e368f29 | 1417 | Assumes POWER7 or PPC970. */ |
aa04b4cc PM |
1418 | static inline int lpcr_rmls(unsigned long rma_size) |
1419 | { | |
1420 | switch (rma_size) { | |
1421 | case 32ul << 20: /* 32 MB */ | |
9e368f29 PM |
1422 | if (cpu_has_feature(CPU_FTR_ARCH_206)) |
1423 | return 8; /* only supported on POWER7 */ | |
1424 | return -1; | |
aa04b4cc PM |
1425 | case 64ul << 20: /* 64 MB */ |
1426 | return 3; | |
1427 | case 128ul << 20: /* 128 MB */ | |
1428 | return 7; | |
1429 | case 256ul << 20: /* 256 MB */ | |
1430 | return 4; | |
1431 | case 1ul << 30: /* 1 GB */ | |
1432 | return 2; | |
1433 | case 16ul << 30: /* 16 GB */ | |
1434 | return 1; | |
1435 | case 256ul << 30: /* 256 GB */ | |
1436 | return 0; | |
1437 | default: | |
1438 | return -1; | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1443 | { | |
b4e70611 | 1444 | struct kvmppc_linear_info *ri = vma->vm_file->private_data; |
aa04b4cc PM |
1445 | struct page *page; |
1446 | ||
1447 | if (vmf->pgoff >= ri->npages) | |
1448 | return VM_FAULT_SIGBUS; | |
1449 | ||
1450 | page = pfn_to_page(ri->base_pfn + vmf->pgoff); | |
1451 | get_page(page); | |
1452 | vmf->page = page; | |
1453 | return 0; | |
1454 | } | |
1455 | ||
1456 | static const struct vm_operations_struct kvm_rma_vm_ops = { | |
1457 | .fault = kvm_rma_fault, | |
1458 | }; | |
1459 | ||
1460 | static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma) | |
1461 | { | |
314e51b9 | 1462 | vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP; |
aa04b4cc PM |
1463 | vma->vm_ops = &kvm_rma_vm_ops; |
1464 | return 0; | |
1465 | } | |
1466 | ||
1467 | static int kvm_rma_release(struct inode *inode, struct file *filp) | |
1468 | { | |
b4e70611 | 1469 | struct kvmppc_linear_info *ri = filp->private_data; |
aa04b4cc PM |
1470 | |
1471 | kvm_release_rma(ri); | |
1472 | return 0; | |
1473 | } | |
1474 | ||
1475 | static struct file_operations kvm_rma_fops = { | |
1476 | .mmap = kvm_rma_mmap, | |
1477 | .release = kvm_rma_release, | |
1478 | }; | |
1479 | ||
1480 | long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret) | |
1481 | { | |
b4e70611 | 1482 | struct kvmppc_linear_info *ri; |
aa04b4cc PM |
1483 | long fd; |
1484 | ||
1485 | ri = kvm_alloc_rma(); | |
1486 | if (!ri) | |
1487 | return -ENOMEM; | |
1488 | ||
1489 | fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR); | |
1490 | if (fd < 0) | |
1491 | kvm_release_rma(ri); | |
1492 | ||
1493 | ret->rma_size = ri->npages << PAGE_SHIFT; | |
1494 | return fd; | |
1495 | } | |
1496 | ||
5b74716e BH |
1497 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
1498 | int linux_psize) | |
1499 | { | |
1500 | struct mmu_psize_def *def = &mmu_psize_defs[linux_psize]; | |
1501 | ||
1502 | if (!def->shift) | |
1503 | return; | |
1504 | (*sps)->page_shift = def->shift; | |
1505 | (*sps)->slb_enc = def->sllp; | |
1506 | (*sps)->enc[0].page_shift = def->shift; | |
1507 | (*sps)->enc[0].pte_enc = def->penc; | |
1508 | (*sps)++; | |
1509 | } | |
1510 | ||
1511 | int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, struct kvm_ppc_smmu_info *info) | |
1512 | { | |
1513 | struct kvm_ppc_one_seg_page_size *sps; | |
1514 | ||
1515 | info->flags = KVM_PPC_PAGE_SIZES_REAL; | |
1516 | if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) | |
1517 | info->flags |= KVM_PPC_1T_SEGMENTS; | |
1518 | info->slb_size = mmu_slb_size; | |
1519 | ||
1520 | /* We only support these sizes for now, and no muti-size segments */ | |
1521 | sps = &info->sps[0]; | |
1522 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K); | |
1523 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K); | |
1524 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M); | |
1525 | ||
1526 | return 0; | |
1527 | } | |
1528 | ||
82ed3616 PM |
1529 | /* |
1530 | * Get (and clear) the dirty memory log for a memory slot. | |
1531 | */ | |
1532 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) | |
1533 | { | |
1534 | struct kvm_memory_slot *memslot; | |
1535 | int r; | |
1536 | unsigned long n; | |
1537 | ||
1538 | mutex_lock(&kvm->slots_lock); | |
1539 | ||
1540 | r = -EINVAL; | |
1541 | if (log->slot >= KVM_MEMORY_SLOTS) | |
1542 | goto out; | |
1543 | ||
1544 | memslot = id_to_memslot(kvm->memslots, log->slot); | |
1545 | r = -ENOENT; | |
1546 | if (!memslot->dirty_bitmap) | |
1547 | goto out; | |
1548 | ||
1549 | n = kvm_dirty_bitmap_bytes(memslot); | |
1550 | memset(memslot->dirty_bitmap, 0, n); | |
1551 | ||
dfe49dbd | 1552 | r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap); |
82ed3616 PM |
1553 | if (r) |
1554 | goto out; | |
1555 | ||
1556 | r = -EFAULT; | |
1557 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
1558 | goto out; | |
1559 | ||
1560 | r = 0; | |
1561 | out: | |
1562 | mutex_unlock(&kvm->slots_lock); | |
1563 | return r; | |
1564 | } | |
1565 | ||
a66b48c3 | 1566 | static void unpin_slot(struct kvm_memory_slot *memslot) |
de56a948 | 1567 | { |
a66b48c3 PM |
1568 | unsigned long *physp; |
1569 | unsigned long j, npages, pfn; | |
1570 | struct page *page; | |
aa04b4cc | 1571 | |
a66b48c3 PM |
1572 | physp = memslot->arch.slot_phys; |
1573 | npages = memslot->npages; | |
1574 | if (!physp) | |
1575 | return; | |
1576 | for (j = 0; j < npages; j++) { | |
1577 | if (!(physp[j] & KVMPPC_GOT_PAGE)) | |
1578 | continue; | |
1579 | pfn = physp[j] >> PAGE_SHIFT; | |
1580 | page = pfn_to_page(pfn); | |
1581 | SetPageDirty(page); | |
1582 | put_page(page); | |
1583 | } | |
1584 | } | |
1585 | ||
1586 | void kvmppc_core_free_memslot(struct kvm_memory_slot *free, | |
1587 | struct kvm_memory_slot *dont) | |
1588 | { | |
1589 | if (!dont || free->arch.rmap != dont->arch.rmap) { | |
1590 | vfree(free->arch.rmap); | |
1591 | free->arch.rmap = NULL; | |
b2b2f165 | 1592 | } |
a66b48c3 PM |
1593 | if (!dont || free->arch.slot_phys != dont->arch.slot_phys) { |
1594 | unpin_slot(free); | |
1595 | vfree(free->arch.slot_phys); | |
1596 | free->arch.slot_phys = NULL; | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | int kvmppc_core_create_memslot(struct kvm_memory_slot *slot, | |
1601 | unsigned long npages) | |
1602 | { | |
1603 | slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); | |
1604 | if (!slot->arch.rmap) | |
1605 | return -ENOMEM; | |
1606 | slot->arch.slot_phys = NULL; | |
aa04b4cc | 1607 | |
c77162de PM |
1608 | return 0; |
1609 | } | |
aa04b4cc | 1610 | |
a66b48c3 PM |
1611 | int kvmppc_core_prepare_memory_region(struct kvm *kvm, |
1612 | struct kvm_memory_slot *memslot, | |
1613 | struct kvm_userspace_memory_region *mem) | |
c77162de | 1614 | { |
a66b48c3 | 1615 | unsigned long *phys; |
c77162de | 1616 | |
a66b48c3 PM |
1617 | /* Allocate a slot_phys array if needed */ |
1618 | phys = memslot->arch.slot_phys; | |
1619 | if (!kvm->arch.using_mmu_notifiers && !phys && memslot->npages) { | |
1620 | phys = vzalloc(memslot->npages * sizeof(unsigned long)); | |
1621 | if (!phys) | |
1622 | return -ENOMEM; | |
1623 | memslot->arch.slot_phys = phys; | |
aa04b4cc | 1624 | } |
a66b48c3 PM |
1625 | |
1626 | return 0; | |
c77162de PM |
1627 | } |
1628 | ||
1629 | void kvmppc_core_commit_memory_region(struct kvm *kvm, | |
dfe49dbd PM |
1630 | struct kvm_userspace_memory_region *mem, |
1631 | struct kvm_memory_slot old) | |
c77162de | 1632 | { |
dfe49dbd PM |
1633 | unsigned long npages = mem->memory_size >> PAGE_SHIFT; |
1634 | struct kvm_memory_slot *memslot; | |
1635 | ||
1636 | if (npages && old.npages) { | |
1637 | /* | |
1638 | * If modifying a memslot, reset all the rmap dirty bits. | |
1639 | * If this is a new memslot, we don't need to do anything | |
1640 | * since the rmap array starts out as all zeroes, | |
1641 | * i.e. no pages are dirty. | |
1642 | */ | |
1643 | memslot = id_to_memslot(kvm->memslots, mem->slot); | |
1644 | kvmppc_hv_get_dirty_log(kvm, memslot, NULL); | |
1645 | } | |
c77162de PM |
1646 | } |
1647 | ||
32fad281 | 1648 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
c77162de PM |
1649 | { |
1650 | int err = 0; | |
1651 | struct kvm *kvm = vcpu->kvm; | |
b4e70611 | 1652 | struct kvmppc_linear_info *ri = NULL; |
c77162de PM |
1653 | unsigned long hva; |
1654 | struct kvm_memory_slot *memslot; | |
1655 | struct vm_area_struct *vma; | |
da9d1d7f | 1656 | unsigned long lpcr, senc; |
c77162de PM |
1657 | unsigned long psize, porder; |
1658 | unsigned long rma_size; | |
1659 | unsigned long rmls; | |
1660 | unsigned long *physp; | |
da9d1d7f | 1661 | unsigned long i, npages; |
2c9097e4 | 1662 | int srcu_idx; |
c77162de PM |
1663 | |
1664 | mutex_lock(&kvm->lock); | |
1665 | if (kvm->arch.rma_setup_done) | |
1666 | goto out; /* another vcpu beat us to it */ | |
aa04b4cc | 1667 | |
32fad281 PM |
1668 | /* Allocate hashed page table (if not done already) and reset it */ |
1669 | if (!kvm->arch.hpt_virt) { | |
1670 | err = kvmppc_alloc_hpt(kvm, NULL); | |
1671 | if (err) { | |
1672 | pr_err("KVM: Couldn't alloc HPT\n"); | |
1673 | goto out; | |
1674 | } | |
1675 | } | |
1676 | ||
c77162de | 1677 | /* Look up the memslot for guest physical address 0 */ |
2c9097e4 | 1678 | srcu_idx = srcu_read_lock(&kvm->srcu); |
c77162de | 1679 | memslot = gfn_to_memslot(kvm, 0); |
aa04b4cc | 1680 | |
c77162de PM |
1681 | /* We must have some memory at 0 by now */ |
1682 | err = -EINVAL; | |
1683 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) | |
2c9097e4 | 1684 | goto out_srcu; |
c77162de PM |
1685 | |
1686 | /* Look up the VMA for the start of this memory slot */ | |
1687 | hva = memslot->userspace_addr; | |
1688 | down_read(¤t->mm->mmap_sem); | |
1689 | vma = find_vma(current->mm, hva); | |
1690 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) | |
1691 | goto up_out; | |
1692 | ||
1693 | psize = vma_kernel_pagesize(vma); | |
da9d1d7f | 1694 | porder = __ilog2(psize); |
c77162de PM |
1695 | |
1696 | /* Is this one of our preallocated RMAs? */ | |
1697 | if (vma->vm_file && vma->vm_file->f_op == &kvm_rma_fops && | |
1698 | hva == vma->vm_start) | |
1699 | ri = vma->vm_file->private_data; | |
1700 | ||
1701 | up_read(¤t->mm->mmap_sem); | |
1702 | ||
1703 | if (!ri) { | |
1704 | /* On POWER7, use VRMA; on PPC970, give up */ | |
1705 | err = -EPERM; | |
1706 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { | |
1707 | pr_err("KVM: CPU requires an RMO\n"); | |
2c9097e4 | 1708 | goto out_srcu; |
c77162de PM |
1709 | } |
1710 | ||
da9d1d7f PM |
1711 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
1712 | err = -EINVAL; | |
1713 | if (!(psize == 0x1000 || psize == 0x10000 || | |
1714 | psize == 0x1000000)) | |
2c9097e4 | 1715 | goto out_srcu; |
da9d1d7f | 1716 | |
c77162de | 1717 | /* Update VRMASD field in the LPCR */ |
da9d1d7f | 1718 | senc = slb_pgsize_encoding(psize); |
697d3899 PM |
1719 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | |
1720 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
da9d1d7f PM |
1721 | lpcr = kvm->arch.lpcr & ~LPCR_VRMASD; |
1722 | lpcr |= senc << (LPCR_VRMASD_SH - 4); | |
c77162de PM |
1723 | kvm->arch.lpcr = lpcr; |
1724 | ||
1725 | /* Create HPTEs in the hash page table for the VRMA */ | |
da9d1d7f | 1726 | kvmppc_map_vrma(vcpu, memslot, porder); |
c77162de PM |
1727 | |
1728 | } else { | |
1729 | /* Set up to use an RMO region */ | |
1730 | rma_size = ri->npages; | |
1731 | if (rma_size > memslot->npages) | |
1732 | rma_size = memslot->npages; | |
1733 | rma_size <<= PAGE_SHIFT; | |
aa04b4cc | 1734 | rmls = lpcr_rmls(rma_size); |
c77162de | 1735 | err = -EINVAL; |
aa04b4cc | 1736 | if (rmls < 0) { |
c77162de | 1737 | pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size); |
2c9097e4 | 1738 | goto out_srcu; |
aa04b4cc PM |
1739 | } |
1740 | atomic_inc(&ri->use_count); | |
1741 | kvm->arch.rma = ri; | |
9e368f29 PM |
1742 | |
1743 | /* Update LPCR and RMOR */ | |
1744 | lpcr = kvm->arch.lpcr; | |
1745 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { | |
1746 | /* PPC970; insert RMLS value (split field) in HID4 */ | |
1747 | lpcr &= ~((1ul << HID4_RMLS0_SH) | | |
1748 | (3ul << HID4_RMLS2_SH)); | |
1749 | lpcr |= ((rmls >> 2) << HID4_RMLS0_SH) | | |
1750 | ((rmls & 3) << HID4_RMLS2_SH); | |
1751 | /* RMOR is also in HID4 */ | |
1752 | lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff) | |
1753 | << HID4_RMOR_SH; | |
1754 | } else { | |
1755 | /* POWER7 */ | |
1756 | lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L); | |
1757 | lpcr |= rmls << LPCR_RMLS_SH; | |
1758 | kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT; | |
1759 | } | |
aa04b4cc | 1760 | kvm->arch.lpcr = lpcr; |
c77162de | 1761 | pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n", |
aa04b4cc | 1762 | ri->base_pfn << PAGE_SHIFT, rma_size, lpcr); |
aa04b4cc | 1763 | |
c77162de | 1764 | /* Initialize phys addrs of pages in RMO */ |
da9d1d7f PM |
1765 | npages = ri->npages; |
1766 | porder = __ilog2(npages); | |
a66b48c3 PM |
1767 | physp = memslot->arch.slot_phys; |
1768 | if (physp) { | |
1769 | if (npages > memslot->npages) | |
1770 | npages = memslot->npages; | |
1771 | spin_lock(&kvm->arch.slot_phys_lock); | |
1772 | for (i = 0; i < npages; ++i) | |
1773 | physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + | |
1774 | porder; | |
1775 | spin_unlock(&kvm->arch.slot_phys_lock); | |
1776 | } | |
aa04b4cc PM |
1777 | } |
1778 | ||
c77162de PM |
1779 | /* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */ |
1780 | smp_wmb(); | |
1781 | kvm->arch.rma_setup_done = 1; | |
1782 | err = 0; | |
2c9097e4 PM |
1783 | out_srcu: |
1784 | srcu_read_unlock(&kvm->srcu, srcu_idx); | |
c77162de PM |
1785 | out: |
1786 | mutex_unlock(&kvm->lock); | |
1787 | return err; | |
b2b2f165 | 1788 | |
c77162de PM |
1789 | up_out: |
1790 | up_read(¤t->mm->mmap_sem); | |
1791 | goto out; | |
de56a948 PM |
1792 | } |
1793 | ||
1794 | int kvmppc_core_init_vm(struct kvm *kvm) | |
1795 | { | |
32fad281 | 1796 | unsigned long lpcr, lpid; |
de56a948 | 1797 | |
32fad281 PM |
1798 | /* Allocate the guest's logical partition ID */ |
1799 | ||
1800 | lpid = kvmppc_alloc_lpid(); | |
1801 | if (lpid < 0) | |
1802 | return -ENOMEM; | |
1803 | kvm->arch.lpid = lpid; | |
de56a948 | 1804 | |
54738c09 | 1805 | INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables); |
aa04b4cc | 1806 | |
aa04b4cc | 1807 | kvm->arch.rma = NULL; |
aa04b4cc | 1808 | |
9e368f29 | 1809 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
aa04b4cc | 1810 | |
9e368f29 PM |
1811 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
1812 | /* PPC970; HID4 is effectively the LPCR */ | |
9e368f29 PM |
1813 | kvm->arch.host_lpid = 0; |
1814 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4); | |
1815 | lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH)); | |
1816 | lpcr |= ((lpid >> 4) << HID4_LPID1_SH) | | |
1817 | ((lpid & 0xf) << HID4_LPID5_SH); | |
1818 | } else { | |
1819 | /* POWER7; init LPCR for virtual RMA mode */ | |
1820 | kvm->arch.host_lpid = mfspr(SPRN_LPID); | |
1821 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); | |
1822 | lpcr &= LPCR_PECE | LPCR_LPES; | |
1823 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | | |
697d3899 PM |
1824 | LPCR_VPM0 | LPCR_VPM1; |
1825 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | | |
1826 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
9e368f29 PM |
1827 | } |
1828 | kvm->arch.lpcr = lpcr; | |
aa04b4cc | 1829 | |
342d3db7 | 1830 | kvm->arch.using_mmu_notifiers = !!cpu_has_feature(CPU_FTR_ARCH_206); |
c77162de | 1831 | spin_lock_init(&kvm->arch.slot_phys_lock); |
512691d4 PM |
1832 | |
1833 | /* | |
1834 | * Don't allow secondary CPU threads to come online | |
1835 | * while any KVM VMs exist. | |
1836 | */ | |
1837 | inhibit_secondary_onlining(); | |
1838 | ||
54738c09 | 1839 | return 0; |
de56a948 PM |
1840 | } |
1841 | ||
1842 | void kvmppc_core_destroy_vm(struct kvm *kvm) | |
1843 | { | |
512691d4 PM |
1844 | uninhibit_secondary_onlining(); |
1845 | ||
aa04b4cc PM |
1846 | if (kvm->arch.rma) { |
1847 | kvm_release_rma(kvm->arch.rma); | |
1848 | kvm->arch.rma = NULL; | |
1849 | } | |
1850 | ||
de56a948 | 1851 | kvmppc_free_hpt(kvm); |
54738c09 | 1852 | WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables)); |
de56a948 PM |
1853 | } |
1854 | ||
1855 | /* These are stubs for now */ | |
1856 | void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end) | |
1857 | { | |
1858 | } | |
1859 | ||
1860 | /* We don't need to emulate any privileged instructions or dcbz */ | |
1861 | int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
1862 | unsigned int inst, int *advance) | |
1863 | { | |
1864 | return EMULATE_FAIL; | |
1865 | } | |
1866 | ||
54771e62 | 1867 | int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) |
de56a948 PM |
1868 | { |
1869 | return EMULATE_FAIL; | |
1870 | } | |
1871 | ||
54771e62 | 1872 | int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val) |
de56a948 PM |
1873 | { |
1874 | return EMULATE_FAIL; | |
1875 | } | |
1876 | ||
1877 | static int kvmppc_book3s_hv_init(void) | |
1878 | { | |
1879 | int r; | |
1880 | ||
1881 | r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
1882 | ||
1883 | if (r) | |
1884 | return r; | |
1885 | ||
1886 | r = kvmppc_mmu_hv_init(); | |
1887 | ||
1888 | return r; | |
1889 | } | |
1890 | ||
1891 | static void kvmppc_book3s_hv_exit(void) | |
1892 | { | |
1893 | kvm_exit(); | |
1894 | } | |
1895 | ||
1896 | module_init(kvmppc_book3s_hv_init); | |
1897 | module_exit(kvmppc_book3s_hv_exit); |