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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); |
32fad281 | 59 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
19ccb76a | 60 | |
de56a948 PM |
61 | void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
62 | { | |
0456ec4f PM |
63 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
64 | ||
de56a948 | 65 | local_paca->kvm_hstate.kvm_vcpu = vcpu; |
0456ec4f PM |
66 | local_paca->kvm_hstate.kvm_vcore = vc; |
67 | if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) | |
68 | vc->stolen_tb += mftb() - vc->preempt_tb; | |
de56a948 PM |
69 | } |
70 | ||
71 | void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) | |
72 | { | |
0456ec4f PM |
73 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
74 | ||
75 | if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) | |
76 | vc->preempt_tb = mftb(); | |
de56a948 PM |
77 | } |
78 | ||
de56a948 PM |
79 | void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr) |
80 | { | |
81 | vcpu->arch.shregs.msr = msr; | |
19ccb76a | 82 | kvmppc_end_cede(vcpu); |
de56a948 PM |
83 | } |
84 | ||
85 | void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr) | |
86 | { | |
87 | vcpu->arch.pvr = pvr; | |
88 | } | |
89 | ||
90 | void kvmppc_dump_regs(struct kvm_vcpu *vcpu) | |
91 | { | |
92 | int r; | |
93 | ||
94 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); | |
95 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", | |
96 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); | |
97 | for (r = 0; r < 16; ++r) | |
98 | pr_err("r%2d = %.16lx r%d = %.16lx\n", | |
99 | r, kvmppc_get_gpr(vcpu, r), | |
100 | r+16, kvmppc_get_gpr(vcpu, r+16)); | |
101 | pr_err("ctr = %.16lx lr = %.16lx\n", | |
102 | vcpu->arch.ctr, vcpu->arch.lr); | |
103 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", | |
104 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); | |
105 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", | |
106 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); | |
107 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", | |
108 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); | |
109 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", | |
110 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); | |
111 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); | |
112 | pr_err("fault dar = %.16lx dsisr = %.8x\n", | |
113 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
114 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); | |
115 | for (r = 0; r < vcpu->arch.slb_max; ++r) | |
116 | pr_err(" ESID = %.16llx VSID = %.16llx\n", | |
117 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); | |
118 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", | |
aa04b4cc | 119 | vcpu->kvm->arch.lpcr, vcpu->kvm->arch.sdr1, |
de56a948 PM |
120 | vcpu->arch.last_inst); |
121 | } | |
122 | ||
a8606e20 PM |
123 | struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
124 | { | |
125 | int r; | |
126 | struct kvm_vcpu *v, *ret = NULL; | |
127 | ||
128 | mutex_lock(&kvm->lock); | |
129 | kvm_for_each_vcpu(r, v, kvm) { | |
130 | if (v->vcpu_id == id) { | |
131 | ret = v; | |
132 | break; | |
133 | } | |
134 | } | |
135 | mutex_unlock(&kvm->lock); | |
136 | return ret; | |
137 | } | |
138 | ||
139 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) | |
140 | { | |
141 | vpa->shared_proc = 1; | |
142 | vpa->yield_count = 1; | |
143 | } | |
144 | ||
2e25aa5f PM |
145 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
146 | struct reg_vpa { | |
147 | u32 dummy; | |
148 | union { | |
149 | u16 hword; | |
150 | u32 word; | |
151 | } length; | |
152 | }; | |
153 | ||
154 | static int vpa_is_registered(struct kvmppc_vpa *vpap) | |
155 | { | |
156 | if (vpap->update_pending) | |
157 | return vpap->next_gpa != 0; | |
158 | return vpap->pinned_addr != NULL; | |
159 | } | |
160 | ||
a8606e20 PM |
161 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
162 | unsigned long flags, | |
163 | unsigned long vcpuid, unsigned long vpa) | |
164 | { | |
165 | struct kvm *kvm = vcpu->kvm; | |
93e60249 | 166 | unsigned long len, nb; |
a8606e20 PM |
167 | void *va; |
168 | struct kvm_vcpu *tvcpu; | |
2e25aa5f PM |
169 | int err; |
170 | int subfunc; | |
171 | struct kvmppc_vpa *vpap; | |
a8606e20 PM |
172 | |
173 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); | |
174 | if (!tvcpu) | |
175 | return H_PARAMETER; | |
176 | ||
2e25aa5f PM |
177 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
178 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || | |
179 | subfunc == H_VPA_REG_SLB) { | |
180 | /* Registering new area - address must be cache-line aligned */ | |
181 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) | |
a8606e20 | 182 | return H_PARAMETER; |
2e25aa5f PM |
183 | |
184 | /* convert logical addr to kernel addr and read length */ | |
93e60249 PM |
185 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
186 | if (va == NULL) | |
b2b2f165 | 187 | return H_PARAMETER; |
2e25aa5f PM |
188 | if (subfunc == H_VPA_REG_VPA) |
189 | len = ((struct reg_vpa *)va)->length.hword; | |
a8606e20 | 190 | else |
2e25aa5f PM |
191 | len = ((struct reg_vpa *)va)->length.word; |
192 | kvmppc_unpin_guest_page(kvm, va); | |
193 | ||
194 | /* Check length */ | |
195 | if (len > nb || len < sizeof(struct reg_vpa)) | |
196 | return H_PARAMETER; | |
197 | } else { | |
198 | vpa = 0; | |
199 | len = 0; | |
200 | } | |
201 | ||
202 | err = H_PARAMETER; | |
203 | vpap = NULL; | |
204 | spin_lock(&tvcpu->arch.vpa_update_lock); | |
205 | ||
206 | switch (subfunc) { | |
207 | case H_VPA_REG_VPA: /* register VPA */ | |
208 | if (len < sizeof(struct lppaca)) | |
a8606e20 | 209 | break; |
2e25aa5f PM |
210 | vpap = &tvcpu->arch.vpa; |
211 | err = 0; | |
212 | break; | |
213 | ||
214 | case H_VPA_REG_DTL: /* register DTL */ | |
215 | if (len < sizeof(struct dtl_entry)) | |
a8606e20 | 216 | break; |
2e25aa5f PM |
217 | len -= len % sizeof(struct dtl_entry); |
218 | ||
219 | /* Check that they have previously registered a VPA */ | |
220 | err = H_RESOURCE; | |
221 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 222 | break; |
2e25aa5f PM |
223 | |
224 | vpap = &tvcpu->arch.dtl; | |
225 | err = 0; | |
226 | break; | |
227 | ||
228 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ | |
229 | /* Check that they have previously registered a VPA */ | |
230 | err = H_RESOURCE; | |
231 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 232 | break; |
2e25aa5f PM |
233 | |
234 | vpap = &tvcpu->arch.slb_shadow; | |
235 | err = 0; | |
236 | break; | |
237 | ||
238 | case H_VPA_DEREG_VPA: /* deregister VPA */ | |
239 | /* Check they don't still have a DTL or SLB buf registered */ | |
240 | err = H_RESOURCE; | |
241 | if (vpa_is_registered(&tvcpu->arch.dtl) || | |
242 | vpa_is_registered(&tvcpu->arch.slb_shadow)) | |
a8606e20 | 243 | break; |
2e25aa5f PM |
244 | |
245 | vpap = &tvcpu->arch.vpa; | |
246 | err = 0; | |
247 | break; | |
248 | ||
249 | case H_VPA_DEREG_DTL: /* deregister DTL */ | |
250 | vpap = &tvcpu->arch.dtl; | |
251 | err = 0; | |
252 | break; | |
253 | ||
254 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ | |
255 | vpap = &tvcpu->arch.slb_shadow; | |
256 | err = 0; | |
257 | break; | |
258 | } | |
259 | ||
260 | if (vpap) { | |
261 | vpap->next_gpa = vpa; | |
262 | vpap->len = len; | |
263 | vpap->update_pending = 1; | |
a8606e20 | 264 | } |
93e60249 | 265 | |
2e25aa5f PM |
266 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
267 | ||
93e60249 | 268 | return err; |
a8606e20 PM |
269 | } |
270 | ||
081f323b | 271 | static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap) |
2e25aa5f | 272 | { |
081f323b | 273 | struct kvm *kvm = vcpu->kvm; |
2e25aa5f PM |
274 | void *va; |
275 | unsigned long nb; | |
081f323b | 276 | unsigned long gpa; |
2e25aa5f | 277 | |
081f323b PM |
278 | /* |
279 | * We need to pin the page pointed to by vpap->next_gpa, | |
280 | * but we can't call kvmppc_pin_guest_page under the lock | |
281 | * as it does get_user_pages() and down_read(). So we | |
282 | * have to drop the lock, pin the page, then get the lock | |
283 | * again and check that a new area didn't get registered | |
284 | * in the meantime. | |
285 | */ | |
286 | for (;;) { | |
287 | gpa = vpap->next_gpa; | |
288 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
289 | va = NULL; | |
290 | nb = 0; | |
291 | if (gpa) | |
292 | va = kvmppc_pin_guest_page(kvm, vpap->next_gpa, &nb); | |
293 | spin_lock(&vcpu->arch.vpa_update_lock); | |
294 | if (gpa == vpap->next_gpa) | |
295 | break; | |
296 | /* sigh... unpin that one and try again */ | |
297 | if (va) | |
2e25aa5f | 298 | kvmppc_unpin_guest_page(kvm, va); |
081f323b PM |
299 | } |
300 | ||
301 | vpap->update_pending = 0; | |
302 | if (va && nb < vpap->len) { | |
303 | /* | |
304 | * If it's now too short, it must be that userspace | |
305 | * has changed the mappings underlying guest memory, | |
306 | * so unregister the region. | |
307 | */ | |
308 | kvmppc_unpin_guest_page(kvm, va); | |
309 | va = NULL; | |
2e25aa5f PM |
310 | } |
311 | if (vpap->pinned_addr) | |
312 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr); | |
313 | vpap->pinned_addr = va; | |
314 | if (va) | |
315 | vpap->pinned_end = va + vpap->len; | |
316 | } | |
317 | ||
318 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) | |
319 | { | |
2e25aa5f PM |
320 | spin_lock(&vcpu->arch.vpa_update_lock); |
321 | if (vcpu->arch.vpa.update_pending) { | |
081f323b | 322 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); |
2e25aa5f PM |
323 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); |
324 | } | |
325 | if (vcpu->arch.dtl.update_pending) { | |
081f323b | 326 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); |
2e25aa5f PM |
327 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
328 | vcpu->arch.dtl_index = 0; | |
329 | } | |
330 | if (vcpu->arch.slb_shadow.update_pending) | |
081f323b | 331 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); |
2e25aa5f PM |
332 | spin_unlock(&vcpu->arch.vpa_update_lock); |
333 | } | |
334 | ||
0456ec4f PM |
335 | static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
336 | struct kvmppc_vcore *vc) | |
337 | { | |
338 | struct dtl_entry *dt; | |
339 | struct lppaca *vpa; | |
340 | unsigned long old_stolen; | |
341 | ||
342 | dt = vcpu->arch.dtl_ptr; | |
343 | vpa = vcpu->arch.vpa.pinned_addr; | |
344 | old_stolen = vcpu->arch.stolen_logged; | |
345 | vcpu->arch.stolen_logged = vc->stolen_tb; | |
346 | if (!dt || !vpa) | |
347 | return; | |
348 | memset(dt, 0, sizeof(struct dtl_entry)); | |
349 | dt->dispatch_reason = 7; | |
350 | dt->processor_id = vc->pcpu + vcpu->arch.ptid; | |
351 | dt->timebase = mftb(); | |
352 | dt->enqueue_to_dispatch_time = vc->stolen_tb - old_stolen; | |
353 | dt->srr0 = kvmppc_get_pc(vcpu); | |
354 | dt->srr1 = vcpu->arch.shregs.msr; | |
355 | ++dt; | |
356 | if (dt == vcpu->arch.dtl.pinned_end) | |
357 | dt = vcpu->arch.dtl.pinned_addr; | |
358 | vcpu->arch.dtl_ptr = dt; | |
359 | /* order writing *dt vs. writing vpa->dtl_idx */ | |
360 | smp_wmb(); | |
361 | vpa->dtl_idx = ++vcpu->arch.dtl_index; | |
362 | } | |
363 | ||
a8606e20 PM |
364 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
365 | { | |
366 | unsigned long req = kvmppc_get_gpr(vcpu, 3); | |
367 | unsigned long target, ret = H_SUCCESS; | |
368 | struct kvm_vcpu *tvcpu; | |
369 | ||
370 | switch (req) { | |
c77162de PM |
371 | case H_ENTER: |
372 | ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4), | |
373 | kvmppc_get_gpr(vcpu, 5), | |
374 | kvmppc_get_gpr(vcpu, 6), | |
375 | kvmppc_get_gpr(vcpu, 7)); | |
376 | break; | |
a8606e20 | 377 | case H_CEDE: |
a8606e20 PM |
378 | break; |
379 | case H_PROD: | |
380 | target = kvmppc_get_gpr(vcpu, 4); | |
381 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
382 | if (!tvcpu) { | |
383 | ret = H_PARAMETER; | |
384 | break; | |
385 | } | |
386 | tvcpu->arch.prodded = 1; | |
387 | smp_mb(); | |
388 | if (vcpu->arch.ceded) { | |
389 | if (waitqueue_active(&vcpu->wq)) { | |
390 | wake_up_interruptible(&vcpu->wq); | |
391 | vcpu->stat.halt_wakeup++; | |
392 | } | |
393 | } | |
394 | break; | |
395 | case H_CONFER: | |
396 | break; | |
397 | case H_REGISTER_VPA: | |
398 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), | |
399 | kvmppc_get_gpr(vcpu, 5), | |
400 | kvmppc_get_gpr(vcpu, 6)); | |
401 | break; | |
402 | default: | |
403 | return RESUME_HOST; | |
404 | } | |
405 | kvmppc_set_gpr(vcpu, 3, ret); | |
406 | vcpu->arch.hcall_needed = 0; | |
407 | return RESUME_GUEST; | |
408 | } | |
409 | ||
de56a948 PM |
410 | static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, |
411 | struct task_struct *tsk) | |
412 | { | |
413 | int r = RESUME_HOST; | |
414 | ||
415 | vcpu->stat.sum_exits++; | |
416 | ||
417 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
418 | run->ready_for_interrupt_injection = 1; | |
419 | switch (vcpu->arch.trap) { | |
420 | /* We're good on these - the host merely wanted to get our attention */ | |
421 | case BOOK3S_INTERRUPT_HV_DECREMENTER: | |
422 | vcpu->stat.dec_exits++; | |
423 | r = RESUME_GUEST; | |
424 | break; | |
425 | case BOOK3S_INTERRUPT_EXTERNAL: | |
426 | vcpu->stat.ext_intr_exits++; | |
427 | r = RESUME_GUEST; | |
428 | break; | |
429 | case BOOK3S_INTERRUPT_PERFMON: | |
430 | r = RESUME_GUEST; | |
431 | break; | |
432 | case BOOK3S_INTERRUPT_PROGRAM: | |
433 | { | |
434 | ulong flags; | |
435 | /* | |
436 | * Normally program interrupts are delivered directly | |
437 | * to the guest by the hardware, but we can get here | |
438 | * as a result of a hypervisor emulation interrupt | |
439 | * (e40) getting turned into a 700 by BML RTAS. | |
440 | */ | |
441 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; | |
442 | kvmppc_core_queue_program(vcpu, flags); | |
443 | r = RESUME_GUEST; | |
444 | break; | |
445 | } | |
446 | case BOOK3S_INTERRUPT_SYSCALL: | |
447 | { | |
448 | /* hcall - punt to userspace */ | |
449 | int i; | |
450 | ||
451 | if (vcpu->arch.shregs.msr & MSR_PR) { | |
452 | /* sc 1 from userspace - reflect to guest syscall */ | |
453 | kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_SYSCALL); | |
454 | r = RESUME_GUEST; | |
455 | break; | |
456 | } | |
457 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); | |
458 | for (i = 0; i < 9; ++i) | |
459 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); | |
460 | run->exit_reason = KVM_EXIT_PAPR_HCALL; | |
461 | vcpu->arch.hcall_needed = 1; | |
462 | r = RESUME_HOST; | |
463 | break; | |
464 | } | |
465 | /* | |
342d3db7 PM |
466 | * We get these next two if the guest accesses a page which it thinks |
467 | * it has mapped but which is not actually present, either because | |
468 | * it is for an emulated I/O device or because the corresonding | |
469 | * host page has been paged out. Any other HDSI/HISI interrupts | |
470 | * have been handled already. | |
de56a948 PM |
471 | */ |
472 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: | |
697d3899 PM |
473 | r = kvmppc_book3s_hv_page_fault(run, vcpu, |
474 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
de56a948 PM |
475 | break; |
476 | case BOOK3S_INTERRUPT_H_INST_STORAGE: | |
342d3db7 PM |
477 | r = kvmppc_book3s_hv_page_fault(run, vcpu, |
478 | kvmppc_get_pc(vcpu), 0); | |
de56a948 PM |
479 | break; |
480 | /* | |
481 | * This occurs if the guest executes an illegal instruction. | |
482 | * We just generate a program interrupt to the guest, since | |
483 | * we don't emulate any guest instructions at this stage. | |
484 | */ | |
485 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: | |
486 | kvmppc_core_queue_program(vcpu, 0x80000); | |
487 | r = RESUME_GUEST; | |
488 | break; | |
489 | default: | |
490 | kvmppc_dump_regs(vcpu); | |
491 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
492 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
493 | vcpu->arch.shregs.msr); | |
494 | r = RESUME_HOST; | |
495 | BUG(); | |
496 | break; | |
497 | } | |
498 | ||
de56a948 PM |
499 | return r; |
500 | } | |
501 | ||
502 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
503 | struct kvm_sregs *sregs) | |
504 | { | |
505 | int i; | |
506 | ||
507 | sregs->pvr = vcpu->arch.pvr; | |
508 | ||
509 | memset(sregs, 0, sizeof(struct kvm_sregs)); | |
510 | for (i = 0; i < vcpu->arch.slb_max; i++) { | |
511 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; | |
512 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; | |
513 | } | |
514 | ||
515 | return 0; | |
516 | } | |
517 | ||
518 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, | |
519 | struct kvm_sregs *sregs) | |
520 | { | |
521 | int i, j; | |
522 | ||
523 | kvmppc_set_pvr(vcpu, sregs->pvr); | |
524 | ||
525 | j = 0; | |
526 | for (i = 0; i < vcpu->arch.slb_nr; i++) { | |
527 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { | |
528 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; | |
529 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; | |
530 | ++j; | |
531 | } | |
532 | } | |
533 | vcpu->arch.slb_max = j; | |
534 | ||
535 | return 0; | |
536 | } | |
537 | ||
31f3438e PM |
538 | int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) |
539 | { | |
540 | int r = -EINVAL; | |
541 | ||
542 | switch (reg->id) { | |
543 | case KVM_REG_PPC_HIOR: | |
544 | r = put_user(0, (u64 __user *)reg->addr); | |
545 | break; | |
546 | default: | |
547 | break; | |
548 | } | |
549 | ||
550 | return r; | |
551 | } | |
552 | ||
553 | int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) | |
554 | { | |
555 | int r = -EINVAL; | |
556 | ||
557 | switch (reg->id) { | |
558 | case KVM_REG_PPC_HIOR: | |
559 | { | |
560 | u64 hior; | |
561 | /* Only allow this to be set to zero */ | |
562 | r = get_user(hior, (u64 __user *)reg->addr); | |
563 | if (!r && (hior != 0)) | |
564 | r = -EINVAL; | |
565 | break; | |
566 | } | |
567 | default: | |
568 | break; | |
569 | } | |
570 | ||
571 | return r; | |
572 | } | |
573 | ||
de56a948 PM |
574 | int kvmppc_core_check_processor_compat(void) |
575 | { | |
9e368f29 | 576 | if (cpu_has_feature(CPU_FTR_HVMODE)) |
de56a948 PM |
577 | return 0; |
578 | return -EIO; | |
579 | } | |
580 | ||
581 | struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) | |
582 | { | |
583 | struct kvm_vcpu *vcpu; | |
371fefd6 PM |
584 | int err = -EINVAL; |
585 | int core; | |
586 | struct kvmppc_vcore *vcore; | |
de56a948 | 587 | |
371fefd6 PM |
588 | core = id / threads_per_core; |
589 | if (core >= KVM_MAX_VCORES) | |
590 | goto out; | |
591 | ||
592 | err = -ENOMEM; | |
6b75e6bf | 593 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
de56a948 PM |
594 | if (!vcpu) |
595 | goto out; | |
596 | ||
597 | err = kvm_vcpu_init(vcpu, kvm, id); | |
598 | if (err) | |
599 | goto free_vcpu; | |
600 | ||
601 | vcpu->arch.shared = &vcpu->arch.shregs; | |
602 | vcpu->arch.last_cpu = -1; | |
603 | vcpu->arch.mmcr[0] = MMCR0_FC; | |
604 | vcpu->arch.ctrl = CTRL_RUNLATCH; | |
605 | /* default to host PVR, since we can't spoof it */ | |
606 | vcpu->arch.pvr = mfspr(SPRN_PVR); | |
607 | kvmppc_set_pvr(vcpu, vcpu->arch.pvr); | |
2e25aa5f | 608 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
de56a948 | 609 | |
de56a948 PM |
610 | kvmppc_mmu_book3s_hv_init(vcpu); |
611 | ||
371fefd6 | 612 | /* |
19ccb76a | 613 | * We consider the vcpu stopped until we see the first run ioctl for it. |
371fefd6 | 614 | */ |
19ccb76a | 615 | vcpu->arch.state = KVMPPC_VCPU_STOPPED; |
371fefd6 PM |
616 | |
617 | init_waitqueue_head(&vcpu->arch.cpu_run); | |
618 | ||
619 | mutex_lock(&kvm->lock); | |
620 | vcore = kvm->arch.vcores[core]; | |
621 | if (!vcore) { | |
622 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); | |
623 | if (vcore) { | |
624 | INIT_LIST_HEAD(&vcore->runnable_threads); | |
625 | spin_lock_init(&vcore->lock); | |
19ccb76a | 626 | init_waitqueue_head(&vcore->wq); |
0456ec4f | 627 | vcore->preempt_tb = mftb(); |
371fefd6 PM |
628 | } |
629 | kvm->arch.vcores[core] = vcore; | |
630 | } | |
631 | mutex_unlock(&kvm->lock); | |
632 | ||
633 | if (!vcore) | |
634 | goto free_vcpu; | |
635 | ||
636 | spin_lock(&vcore->lock); | |
637 | ++vcore->num_threads; | |
371fefd6 PM |
638 | spin_unlock(&vcore->lock); |
639 | vcpu->arch.vcore = vcore; | |
0456ec4f | 640 | vcpu->arch.stolen_logged = vcore->stolen_tb; |
371fefd6 | 641 | |
af8f38b3 AG |
642 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
643 | kvmppc_sanity_check(vcpu); | |
644 | ||
de56a948 PM |
645 | return vcpu; |
646 | ||
647 | free_vcpu: | |
6b75e6bf | 648 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
649 | out: |
650 | return ERR_PTR(err); | |
651 | } | |
652 | ||
653 | void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) | |
654 | { | |
2e25aa5f PM |
655 | spin_lock(&vcpu->arch.vpa_update_lock); |
656 | if (vcpu->arch.dtl.pinned_addr) | |
657 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.dtl.pinned_addr); | |
658 | if (vcpu->arch.slb_shadow.pinned_addr) | |
659 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.slb_shadow.pinned_addr); | |
660 | if (vcpu->arch.vpa.pinned_addr) | |
661 | kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.vpa.pinned_addr); | |
662 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
de56a948 | 663 | kvm_vcpu_uninit(vcpu); |
6b75e6bf | 664 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
665 | } |
666 | ||
19ccb76a | 667 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
371fefd6 | 668 | { |
19ccb76a | 669 | unsigned long dec_nsec, now; |
371fefd6 | 670 | |
19ccb76a PM |
671 | now = get_tb(); |
672 | if (now > vcpu->arch.dec_expires) { | |
673 | /* decrementer has already gone negative */ | |
674 | kvmppc_core_queue_dec(vcpu); | |
7e28e60e | 675 | kvmppc_core_prepare_to_enter(vcpu); |
19ccb76a | 676 | return; |
371fefd6 | 677 | } |
19ccb76a PM |
678 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
679 | / tb_ticks_per_sec; | |
680 | hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), | |
681 | HRTIMER_MODE_REL); | |
682 | vcpu->arch.timer_running = 1; | |
371fefd6 PM |
683 | } |
684 | ||
19ccb76a | 685 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
371fefd6 | 686 | { |
19ccb76a PM |
687 | vcpu->arch.ceded = 0; |
688 | if (vcpu->arch.timer_running) { | |
689 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
690 | vcpu->arch.timer_running = 0; | |
691 | } | |
371fefd6 PM |
692 | } |
693 | ||
de56a948 | 694 | extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu); |
371fefd6 | 695 | extern void xics_wake_cpu(int cpu); |
de56a948 | 696 | |
371fefd6 PM |
697 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
698 | struct kvm_vcpu *vcpu) | |
de56a948 | 699 | { |
371fefd6 | 700 | struct kvm_vcpu *v; |
de56a948 | 701 | |
371fefd6 PM |
702 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
703 | return; | |
704 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; | |
705 | --vc->n_runnable; | |
19ccb76a | 706 | ++vc->n_busy; |
371fefd6 PM |
707 | /* decrement the physical thread id of each following vcpu */ |
708 | v = vcpu; | |
709 | list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list) | |
710 | --v->arch.ptid; | |
711 | list_del(&vcpu->arch.run_list); | |
712 | } | |
713 | ||
f0888f70 PM |
714 | static int kvmppc_grab_hwthread(int cpu) |
715 | { | |
716 | struct paca_struct *tpaca; | |
717 | long timeout = 1000; | |
718 | ||
719 | tpaca = &paca[cpu]; | |
720 | ||
721 | /* Ensure the thread won't go into the kernel if it wakes */ | |
722 | tpaca->kvm_hstate.hwthread_req = 1; | |
723 | ||
724 | /* | |
725 | * If the thread is already executing in the kernel (e.g. handling | |
726 | * a stray interrupt), wait for it to get back to nap mode. | |
727 | * The smp_mb() is to ensure that our setting of hwthread_req | |
728 | * is visible before we look at hwthread_state, so if this | |
729 | * races with the code at system_reset_pSeries and the thread | |
730 | * misses our setting of hwthread_req, we are sure to see its | |
731 | * setting of hwthread_state, and vice versa. | |
732 | */ | |
733 | smp_mb(); | |
734 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { | |
735 | if (--timeout <= 0) { | |
736 | pr_err("KVM: couldn't grab cpu %d\n", cpu); | |
737 | return -EBUSY; | |
738 | } | |
739 | udelay(1); | |
740 | } | |
741 | return 0; | |
742 | } | |
743 | ||
744 | static void kvmppc_release_hwthread(int cpu) | |
745 | { | |
746 | struct paca_struct *tpaca; | |
747 | ||
748 | tpaca = &paca[cpu]; | |
749 | tpaca->kvm_hstate.hwthread_req = 0; | |
750 | tpaca->kvm_hstate.kvm_vcpu = NULL; | |
751 | } | |
752 | ||
371fefd6 PM |
753 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu) |
754 | { | |
755 | int cpu; | |
756 | struct paca_struct *tpaca; | |
757 | struct kvmppc_vcore *vc = vcpu->arch.vcore; | |
758 | ||
19ccb76a PM |
759 | if (vcpu->arch.timer_running) { |
760 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
761 | vcpu->arch.timer_running = 0; | |
762 | } | |
371fefd6 PM |
763 | cpu = vc->pcpu + vcpu->arch.ptid; |
764 | tpaca = &paca[cpu]; | |
765 | tpaca->kvm_hstate.kvm_vcpu = vcpu; | |
766 | tpaca->kvm_hstate.kvm_vcore = vc; | |
19ccb76a PM |
767 | tpaca->kvm_hstate.napping = 0; |
768 | vcpu->cpu = vc->pcpu; | |
371fefd6 | 769 | smp_wmb(); |
251da038 | 770 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) |
371fefd6 | 771 | if (vcpu->arch.ptid) { |
f0888f70 | 772 | kvmppc_grab_hwthread(cpu); |
371fefd6 PM |
773 | xics_wake_cpu(cpu); |
774 | ++vc->n_woken; | |
de56a948 | 775 | } |
371fefd6 PM |
776 | #endif |
777 | } | |
de56a948 | 778 | |
371fefd6 PM |
779 | static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc) |
780 | { | |
781 | int i; | |
782 | ||
783 | HMT_low(); | |
784 | i = 0; | |
785 | while (vc->nap_count < vc->n_woken) { | |
786 | if (++i >= 1000000) { | |
787 | pr_err("kvmppc_wait_for_nap timeout %d %d\n", | |
788 | vc->nap_count, vc->n_woken); | |
789 | break; | |
790 | } | |
791 | cpu_relax(); | |
792 | } | |
793 | HMT_medium(); | |
794 | } | |
795 | ||
796 | /* | |
797 | * Check that we are on thread 0 and that any other threads in | |
798 | * this core are off-line. | |
799 | */ | |
800 | static int on_primary_thread(void) | |
801 | { | |
802 | int cpu = smp_processor_id(); | |
803 | int thr = cpu_thread_in_core(cpu); | |
804 | ||
805 | if (thr) | |
806 | return 0; | |
807 | while (++thr < threads_per_core) | |
808 | if (cpu_online(cpu + thr)) | |
809 | return 0; | |
810 | return 1; | |
811 | } | |
812 | ||
813 | /* | |
814 | * Run a set of guest threads on a physical core. | |
815 | * Called with vc->lock held. | |
816 | */ | |
817 | static int kvmppc_run_core(struct kvmppc_vcore *vc) | |
818 | { | |
19ccb76a | 819 | struct kvm_vcpu *vcpu, *vcpu0, *vnext; |
371fefd6 PM |
820 | long ret; |
821 | u64 now; | |
081f323b | 822 | int ptid, i, need_vpa_update; |
371fefd6 PM |
823 | |
824 | /* don't start if any threads have a signal pending */ | |
081f323b PM |
825 | need_vpa_update = 0; |
826 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { | |
371fefd6 PM |
827 | if (signal_pending(vcpu->arch.run_task)) |
828 | return 0; | |
081f323b PM |
829 | need_vpa_update |= vcpu->arch.vpa.update_pending | |
830 | vcpu->arch.slb_shadow.update_pending | | |
831 | vcpu->arch.dtl.update_pending; | |
832 | } | |
833 | ||
834 | /* | |
835 | * Initialize *vc, in particular vc->vcore_state, so we can | |
836 | * drop the vcore lock if necessary. | |
837 | */ | |
838 | vc->n_woken = 0; | |
839 | vc->nap_count = 0; | |
840 | vc->entry_exit_count = 0; | |
841 | vc->vcore_state = VCORE_RUNNING; | |
842 | vc->in_guest = 0; | |
843 | vc->napping_threads = 0; | |
844 | ||
845 | /* | |
846 | * Updating any of the vpas requires calling kvmppc_pin_guest_page, | |
847 | * which can't be called with any spinlocks held. | |
848 | */ | |
849 | if (need_vpa_update) { | |
850 | spin_unlock(&vc->lock); | |
851 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
852 | kvmppc_update_vpas(vcpu); | |
853 | spin_lock(&vc->lock); | |
854 | } | |
de56a948 PM |
855 | |
856 | /* | |
857 | * Make sure we are running on thread 0, and that | |
858 | * secondary threads are offline. | |
859 | * XXX we should also block attempts to bring any | |
860 | * secondary threads online. | |
861 | */ | |
371fefd6 PM |
862 | if (threads_per_core > 1 && !on_primary_thread()) { |
863 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
864 | vcpu->arch.ret = -EBUSY; | |
865 | goto out; | |
de56a948 PM |
866 | } |
867 | ||
19ccb76a PM |
868 | /* |
869 | * Assign physical thread IDs, first to non-ceded vcpus | |
870 | * and then to ceded ones. | |
871 | */ | |
872 | ptid = 0; | |
873 | vcpu0 = NULL; | |
874 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { | |
875 | if (!vcpu->arch.ceded) { | |
876 | if (!ptid) | |
877 | vcpu0 = vcpu; | |
878 | vcpu->arch.ptid = ptid++; | |
879 | } | |
880 | } | |
881 | if (!vcpu0) | |
882 | return 0; /* nothing to run */ | |
883 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
884 | if (vcpu->arch.ceded) | |
885 | vcpu->arch.ptid = ptid++; | |
886 | ||
0456ec4f | 887 | vc->stolen_tb += mftb() - vc->preempt_tb; |
371fefd6 | 888 | vc->pcpu = smp_processor_id(); |
2e25aa5f | 889 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
371fefd6 | 890 | kvmppc_start_thread(vcpu); |
0456ec4f | 891 | kvmppc_create_dtl_entry(vcpu, vc); |
2e25aa5f | 892 | } |
f0888f70 PM |
893 | /* Grab any remaining hw threads so they can't go into the kernel */ |
894 | for (i = ptid; i < threads_per_core; ++i) | |
895 | kvmppc_grab_hwthread(vc->pcpu + i); | |
371fefd6 | 896 | |
19ccb76a | 897 | preempt_disable(); |
371fefd6 | 898 | spin_unlock(&vc->lock); |
de56a948 | 899 | |
371fefd6 | 900 | kvm_guest_enter(); |
19ccb76a | 901 | __kvmppc_vcore_entry(NULL, vcpu0); |
f0888f70 PM |
902 | for (i = 0; i < threads_per_core; ++i) |
903 | kvmppc_release_hwthread(vc->pcpu + i); | |
de56a948 | 904 | |
371fefd6 | 905 | spin_lock(&vc->lock); |
19ccb76a PM |
906 | /* disable sending of IPIs on virtual external irqs */ |
907 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
908 | vcpu->cpu = -1; | |
909 | /* wait for secondary threads to finish writing their state to memory */ | |
371fefd6 PM |
910 | if (vc->nap_count < vc->n_woken) |
911 | kvmppc_wait_for_nap(vc); | |
912 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ | |
19ccb76a | 913 | vc->vcore_state = VCORE_EXITING; |
371fefd6 PM |
914 | spin_unlock(&vc->lock); |
915 | ||
916 | /* make sure updates to secondary vcpu structs are visible now */ | |
917 | smp_mb(); | |
de56a948 PM |
918 | kvm_guest_exit(); |
919 | ||
920 | preempt_enable(); | |
921 | kvm_resched(vcpu); | |
922 | ||
923 | now = get_tb(); | |
371fefd6 PM |
924 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
925 | /* cancel pending dec exception if dec is positive */ | |
926 | if (now < vcpu->arch.dec_expires && | |
927 | kvmppc_core_pending_dec(vcpu)) | |
928 | kvmppc_core_dequeue_dec(vcpu); | |
19ccb76a PM |
929 | |
930 | ret = RESUME_GUEST; | |
931 | if (vcpu->arch.trap) | |
932 | ret = kvmppc_handle_exit(vcpu->arch.kvm_run, vcpu, | |
933 | vcpu->arch.run_task); | |
934 | ||
371fefd6 PM |
935 | vcpu->arch.ret = ret; |
936 | vcpu->arch.trap = 0; | |
19ccb76a PM |
937 | |
938 | if (vcpu->arch.ceded) { | |
939 | if (ret != RESUME_GUEST) | |
940 | kvmppc_end_cede(vcpu); | |
941 | else | |
942 | kvmppc_set_timer(vcpu); | |
943 | } | |
371fefd6 | 944 | } |
de56a948 | 945 | |
371fefd6 | 946 | spin_lock(&vc->lock); |
de56a948 | 947 | out: |
19ccb76a | 948 | vc->vcore_state = VCORE_INACTIVE; |
0456ec4f | 949 | vc->preempt_tb = mftb(); |
371fefd6 PM |
950 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, |
951 | arch.run_list) { | |
952 | if (vcpu->arch.ret != RESUME_GUEST) { | |
953 | kvmppc_remove_runnable(vc, vcpu); | |
954 | wake_up(&vcpu->arch.cpu_run); | |
955 | } | |
956 | } | |
957 | ||
958 | return 1; | |
959 | } | |
960 | ||
19ccb76a PM |
961 | /* |
962 | * Wait for some other vcpu thread to execute us, and | |
963 | * wake us up when we need to handle something in the host. | |
964 | */ | |
965 | static void kvmppc_wait_for_exec(struct kvm_vcpu *vcpu, int wait_state) | |
371fefd6 | 966 | { |
371fefd6 PM |
967 | DEFINE_WAIT(wait); |
968 | ||
19ccb76a PM |
969 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
970 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) | |
971 | schedule(); | |
972 | finish_wait(&vcpu->arch.cpu_run, &wait); | |
973 | } | |
974 | ||
975 | /* | |
976 | * All the vcpus in this vcore are idle, so wait for a decrementer | |
977 | * or external interrupt to one of the vcpus. vc->lock is held. | |
978 | */ | |
979 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) | |
980 | { | |
981 | DEFINE_WAIT(wait); | |
982 | struct kvm_vcpu *v; | |
983 | int all_idle = 1; | |
984 | ||
985 | prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); | |
986 | vc->vcore_state = VCORE_SLEEPING; | |
987 | spin_unlock(&vc->lock); | |
988 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) { | |
989 | if (!v->arch.ceded || v->arch.pending_exceptions) { | |
990 | all_idle = 0; | |
991 | break; | |
992 | } | |
371fefd6 | 993 | } |
19ccb76a PM |
994 | if (all_idle) |
995 | schedule(); | |
996 | finish_wait(&vc->wq, &wait); | |
997 | spin_lock(&vc->lock); | |
998 | vc->vcore_state = VCORE_INACTIVE; | |
999 | } | |
371fefd6 | 1000 | |
19ccb76a PM |
1001 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
1002 | { | |
1003 | int n_ceded; | |
1004 | int prev_state; | |
1005 | struct kvmppc_vcore *vc; | |
1006 | struct kvm_vcpu *v, *vn; | |
9e368f29 | 1007 | |
371fefd6 PM |
1008 | kvm_run->exit_reason = 0; |
1009 | vcpu->arch.ret = RESUME_GUEST; | |
1010 | vcpu->arch.trap = 0; | |
1011 | ||
371fefd6 PM |
1012 | /* |
1013 | * Synchronize with other threads in this virtual core | |
1014 | */ | |
1015 | vc = vcpu->arch.vcore; | |
1016 | spin_lock(&vc->lock); | |
19ccb76a | 1017 | vcpu->arch.ceded = 0; |
371fefd6 PM |
1018 | vcpu->arch.run_task = current; |
1019 | vcpu->arch.kvm_run = kvm_run; | |
19ccb76a PM |
1020 | prev_state = vcpu->arch.state; |
1021 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; | |
371fefd6 PM |
1022 | list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads); |
1023 | ++vc->n_runnable; | |
1024 | ||
19ccb76a PM |
1025 | /* |
1026 | * This happens the first time this is called for a vcpu. | |
1027 | * If the vcore is already running, we may be able to start | |
1028 | * this thread straight away and have it join in. | |
1029 | */ | |
1030 | if (prev_state == KVMPPC_VCPU_STOPPED) { | |
1031 | if (vc->vcore_state == VCORE_RUNNING && | |
1032 | VCORE_EXIT_COUNT(vc) == 0) { | |
1033 | vcpu->arch.ptid = vc->n_runnable - 1; | |
1034 | kvmppc_start_thread(vcpu); | |
371fefd6 PM |
1035 | } |
1036 | ||
19ccb76a PM |
1037 | } else if (prev_state == KVMPPC_VCPU_BUSY_IN_HOST) |
1038 | --vc->n_busy; | |
371fefd6 | 1039 | |
19ccb76a PM |
1040 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
1041 | !signal_pending(current)) { | |
1042 | if (vc->n_busy || vc->vcore_state != VCORE_INACTIVE) { | |
1043 | spin_unlock(&vc->lock); | |
1044 | kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE); | |
1045 | spin_lock(&vc->lock); | |
1046 | continue; | |
1047 | } | |
0456ec4f | 1048 | vc->runner = vcpu; |
19ccb76a PM |
1049 | n_ceded = 0; |
1050 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) | |
1051 | n_ceded += v->arch.ceded; | |
1052 | if (n_ceded == vc->n_runnable) | |
1053 | kvmppc_vcore_blocked(vc); | |
1054 | else | |
1055 | kvmppc_run_core(vc); | |
1056 | ||
1057 | list_for_each_entry_safe(v, vn, &vc->runnable_threads, | |
1058 | arch.run_list) { | |
7e28e60e | 1059 | kvmppc_core_prepare_to_enter(v); |
19ccb76a PM |
1060 | if (signal_pending(v->arch.run_task)) { |
1061 | kvmppc_remove_runnable(vc, v); | |
1062 | v->stat.signal_exits++; | |
1063 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; | |
1064 | v->arch.ret = -EINTR; | |
1065 | wake_up(&v->arch.cpu_run); | |
1066 | } | |
1067 | } | |
0456ec4f | 1068 | vc->runner = NULL; |
19ccb76a | 1069 | } |
371fefd6 | 1070 | |
19ccb76a PM |
1071 | if (signal_pending(current)) { |
1072 | if (vc->vcore_state == VCORE_RUNNING || | |
1073 | vc->vcore_state == VCORE_EXITING) { | |
1074 | spin_unlock(&vc->lock); | |
1075 | kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE); | |
1076 | spin_lock(&vc->lock); | |
1077 | } | |
1078 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { | |
1079 | kvmppc_remove_runnable(vc, vcpu); | |
1080 | vcpu->stat.signal_exits++; | |
1081 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
1082 | vcpu->arch.ret = -EINTR; | |
1083 | } | |
371fefd6 PM |
1084 | } |
1085 | ||
371fefd6 | 1086 | spin_unlock(&vc->lock); |
371fefd6 | 1087 | return vcpu->arch.ret; |
de56a948 PM |
1088 | } |
1089 | ||
a8606e20 PM |
1090 | int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu) |
1091 | { | |
1092 | int r; | |
1093 | ||
af8f38b3 AG |
1094 | if (!vcpu->arch.sane) { |
1095 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
1096 | return -EINVAL; | |
1097 | } | |
1098 | ||
25051b5a SW |
1099 | kvmppc_core_prepare_to_enter(vcpu); |
1100 | ||
19ccb76a PM |
1101 | /* No need to go into the guest when all we'll do is come back out */ |
1102 | if (signal_pending(current)) { | |
1103 | run->exit_reason = KVM_EXIT_INTR; | |
1104 | return -EINTR; | |
1105 | } | |
1106 | ||
32fad281 PM |
1107 | atomic_inc(&vcpu->kvm->arch.vcpus_running); |
1108 | /* Order vcpus_running vs. rma_setup_done, see kvmppc_alloc_reset_hpt */ | |
1109 | smp_mb(); | |
1110 | ||
1111 | /* On the first time here, set up HTAB and VRMA or RMA */ | |
c77162de | 1112 | if (!vcpu->kvm->arch.rma_setup_done) { |
32fad281 | 1113 | r = kvmppc_hv_setup_htab_rma(vcpu); |
c77162de | 1114 | if (r) |
32fad281 | 1115 | goto out; |
c77162de | 1116 | } |
19ccb76a PM |
1117 | |
1118 | flush_fp_to_thread(current); | |
1119 | flush_altivec_to_thread(current); | |
1120 | flush_vsx_to_thread(current); | |
1121 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; | |
342d3db7 | 1122 | vcpu->arch.pgdir = current->mm->pgd; |
19ccb76a | 1123 | |
a8606e20 PM |
1124 | do { |
1125 | r = kvmppc_run_vcpu(run, vcpu); | |
1126 | ||
1127 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && | |
1128 | !(vcpu->arch.shregs.msr & MSR_PR)) { | |
1129 | r = kvmppc_pseries_do_hcall(vcpu); | |
7e28e60e | 1130 | kvmppc_core_prepare_to_enter(vcpu); |
a8606e20 PM |
1131 | } |
1132 | } while (r == RESUME_GUEST); | |
32fad281 PM |
1133 | |
1134 | out: | |
1135 | atomic_dec(&vcpu->kvm->arch.vcpus_running); | |
a8606e20 PM |
1136 | return r; |
1137 | } | |
1138 | ||
54738c09 | 1139 | |
aa04b4cc | 1140 | /* Work out RMLS (real mode limit selector) field value for a given RMA size. |
9e368f29 | 1141 | Assumes POWER7 or PPC970. */ |
aa04b4cc PM |
1142 | static inline int lpcr_rmls(unsigned long rma_size) |
1143 | { | |
1144 | switch (rma_size) { | |
1145 | case 32ul << 20: /* 32 MB */ | |
9e368f29 PM |
1146 | if (cpu_has_feature(CPU_FTR_ARCH_206)) |
1147 | return 8; /* only supported on POWER7 */ | |
1148 | return -1; | |
aa04b4cc PM |
1149 | case 64ul << 20: /* 64 MB */ |
1150 | return 3; | |
1151 | case 128ul << 20: /* 128 MB */ | |
1152 | return 7; | |
1153 | case 256ul << 20: /* 256 MB */ | |
1154 | return 4; | |
1155 | case 1ul << 30: /* 1 GB */ | |
1156 | return 2; | |
1157 | case 16ul << 30: /* 16 GB */ | |
1158 | return 1; | |
1159 | case 256ul << 30: /* 256 GB */ | |
1160 | return 0; | |
1161 | default: | |
1162 | return -1; | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf) | |
1167 | { | |
b4e70611 | 1168 | struct kvmppc_linear_info *ri = vma->vm_file->private_data; |
aa04b4cc PM |
1169 | struct page *page; |
1170 | ||
1171 | if (vmf->pgoff >= ri->npages) | |
1172 | return VM_FAULT_SIGBUS; | |
1173 | ||
1174 | page = pfn_to_page(ri->base_pfn + vmf->pgoff); | |
1175 | get_page(page); | |
1176 | vmf->page = page; | |
1177 | return 0; | |
1178 | } | |
1179 | ||
1180 | static const struct vm_operations_struct kvm_rma_vm_ops = { | |
1181 | .fault = kvm_rma_fault, | |
1182 | }; | |
1183 | ||
1184 | static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma) | |
1185 | { | |
1186 | vma->vm_flags |= VM_RESERVED; | |
1187 | vma->vm_ops = &kvm_rma_vm_ops; | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static int kvm_rma_release(struct inode *inode, struct file *filp) | |
1192 | { | |
b4e70611 | 1193 | struct kvmppc_linear_info *ri = filp->private_data; |
aa04b4cc PM |
1194 | |
1195 | kvm_release_rma(ri); | |
1196 | return 0; | |
1197 | } | |
1198 | ||
1199 | static struct file_operations kvm_rma_fops = { | |
1200 | .mmap = kvm_rma_mmap, | |
1201 | .release = kvm_rma_release, | |
1202 | }; | |
1203 | ||
1204 | long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret) | |
1205 | { | |
b4e70611 | 1206 | struct kvmppc_linear_info *ri; |
aa04b4cc PM |
1207 | long fd; |
1208 | ||
1209 | ri = kvm_alloc_rma(); | |
1210 | if (!ri) | |
1211 | return -ENOMEM; | |
1212 | ||
1213 | fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR); | |
1214 | if (fd < 0) | |
1215 | kvm_release_rma(ri); | |
1216 | ||
1217 | ret->rma_size = ri->npages << PAGE_SHIFT; | |
1218 | return fd; | |
1219 | } | |
1220 | ||
5b74716e BH |
1221 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
1222 | int linux_psize) | |
1223 | { | |
1224 | struct mmu_psize_def *def = &mmu_psize_defs[linux_psize]; | |
1225 | ||
1226 | if (!def->shift) | |
1227 | return; | |
1228 | (*sps)->page_shift = def->shift; | |
1229 | (*sps)->slb_enc = def->sllp; | |
1230 | (*sps)->enc[0].page_shift = def->shift; | |
1231 | (*sps)->enc[0].pte_enc = def->penc; | |
1232 | (*sps)++; | |
1233 | } | |
1234 | ||
1235 | int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, struct kvm_ppc_smmu_info *info) | |
1236 | { | |
1237 | struct kvm_ppc_one_seg_page_size *sps; | |
1238 | ||
1239 | info->flags = KVM_PPC_PAGE_SIZES_REAL; | |
1240 | if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) | |
1241 | info->flags |= KVM_PPC_1T_SEGMENTS; | |
1242 | info->slb_size = mmu_slb_size; | |
1243 | ||
1244 | /* We only support these sizes for now, and no muti-size segments */ | |
1245 | sps = &info->sps[0]; | |
1246 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K); | |
1247 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K); | |
1248 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M); | |
1249 | ||
1250 | return 0; | |
1251 | } | |
1252 | ||
82ed3616 PM |
1253 | /* |
1254 | * Get (and clear) the dirty memory log for a memory slot. | |
1255 | */ | |
1256 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) | |
1257 | { | |
1258 | struct kvm_memory_slot *memslot; | |
1259 | int r; | |
1260 | unsigned long n; | |
1261 | ||
1262 | mutex_lock(&kvm->slots_lock); | |
1263 | ||
1264 | r = -EINVAL; | |
1265 | if (log->slot >= KVM_MEMORY_SLOTS) | |
1266 | goto out; | |
1267 | ||
1268 | memslot = id_to_memslot(kvm->memslots, log->slot); | |
1269 | r = -ENOENT; | |
1270 | if (!memslot->dirty_bitmap) | |
1271 | goto out; | |
1272 | ||
1273 | n = kvm_dirty_bitmap_bytes(memslot); | |
1274 | memset(memslot->dirty_bitmap, 0, n); | |
1275 | ||
1276 | r = kvmppc_hv_get_dirty_log(kvm, memslot); | |
1277 | if (r) | |
1278 | goto out; | |
1279 | ||
1280 | r = -EFAULT; | |
1281 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
1282 | goto out; | |
1283 | ||
1284 | r = 0; | |
1285 | out: | |
1286 | mutex_unlock(&kvm->slots_lock); | |
1287 | return r; | |
1288 | } | |
1289 | ||
da9d1d7f PM |
1290 | static unsigned long slb_pgsize_encoding(unsigned long psize) |
1291 | { | |
1292 | unsigned long senc = 0; | |
1293 | ||
1294 | if (psize > 0x1000) { | |
1295 | senc = SLB_VSID_L; | |
1296 | if (psize == 0x10000) | |
1297 | senc |= SLB_VSID_LP_01; | |
1298 | } | |
1299 | return senc; | |
1300 | } | |
1301 | ||
de56a948 PM |
1302 | int kvmppc_core_prepare_memory_region(struct kvm *kvm, |
1303 | struct kvm_userspace_memory_region *mem) | |
1304 | { | |
c77162de | 1305 | unsigned long npages; |
b2b2f165 | 1306 | unsigned long *phys; |
aa04b4cc | 1307 | |
b2b2f165 | 1308 | /* Allocate a slot_phys array */ |
b2b2f165 | 1309 | phys = kvm->arch.slot_phys[mem->slot]; |
342d3db7 PM |
1310 | if (!kvm->arch.using_mmu_notifiers && !phys) { |
1311 | npages = mem->memory_size >> PAGE_SHIFT; | |
b2b2f165 PM |
1312 | phys = vzalloc(npages * sizeof(unsigned long)); |
1313 | if (!phys) | |
1314 | return -ENOMEM; | |
1315 | kvm->arch.slot_phys[mem->slot] = phys; | |
1316 | kvm->arch.slot_npages[mem->slot] = npages; | |
1317 | } | |
aa04b4cc | 1318 | |
c77162de PM |
1319 | return 0; |
1320 | } | |
aa04b4cc | 1321 | |
c77162de PM |
1322 | static void unpin_slot(struct kvm *kvm, int slot_id) |
1323 | { | |
1324 | unsigned long *physp; | |
1325 | unsigned long j, npages, pfn; | |
1326 | struct page *page; | |
1327 | ||
1328 | physp = kvm->arch.slot_phys[slot_id]; | |
1329 | npages = kvm->arch.slot_npages[slot_id]; | |
1330 | if (physp) { | |
1331 | spin_lock(&kvm->arch.slot_phys_lock); | |
1332 | for (j = 0; j < npages; j++) { | |
1333 | if (!(physp[j] & KVMPPC_GOT_PAGE)) | |
1334 | continue; | |
1335 | pfn = physp[j] >> PAGE_SHIFT; | |
1336 | page = pfn_to_page(pfn); | |
1337 | SetPageDirty(page); | |
1338 | put_page(page); | |
9e368f29 | 1339 | } |
c77162de PM |
1340 | kvm->arch.slot_phys[slot_id] = NULL; |
1341 | spin_unlock(&kvm->arch.slot_phys_lock); | |
1342 | vfree(physp); | |
aa04b4cc | 1343 | } |
c77162de PM |
1344 | } |
1345 | ||
1346 | void kvmppc_core_commit_memory_region(struct kvm *kvm, | |
1347 | struct kvm_userspace_memory_region *mem) | |
1348 | { | |
1349 | } | |
1350 | ||
32fad281 | 1351 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
c77162de PM |
1352 | { |
1353 | int err = 0; | |
1354 | struct kvm *kvm = vcpu->kvm; | |
b4e70611 | 1355 | struct kvmppc_linear_info *ri = NULL; |
c77162de PM |
1356 | unsigned long hva; |
1357 | struct kvm_memory_slot *memslot; | |
1358 | struct vm_area_struct *vma; | |
da9d1d7f | 1359 | unsigned long lpcr, senc; |
c77162de PM |
1360 | unsigned long psize, porder; |
1361 | unsigned long rma_size; | |
1362 | unsigned long rmls; | |
1363 | unsigned long *physp; | |
da9d1d7f | 1364 | unsigned long i, npages; |
c77162de PM |
1365 | |
1366 | mutex_lock(&kvm->lock); | |
1367 | if (kvm->arch.rma_setup_done) | |
1368 | goto out; /* another vcpu beat us to it */ | |
aa04b4cc | 1369 | |
32fad281 PM |
1370 | /* Allocate hashed page table (if not done already) and reset it */ |
1371 | if (!kvm->arch.hpt_virt) { | |
1372 | err = kvmppc_alloc_hpt(kvm, NULL); | |
1373 | if (err) { | |
1374 | pr_err("KVM: Couldn't alloc HPT\n"); | |
1375 | goto out; | |
1376 | } | |
1377 | } | |
1378 | ||
c77162de PM |
1379 | /* Look up the memslot for guest physical address 0 */ |
1380 | memslot = gfn_to_memslot(kvm, 0); | |
aa04b4cc | 1381 | |
c77162de PM |
1382 | /* We must have some memory at 0 by now */ |
1383 | err = -EINVAL; | |
1384 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) | |
1385 | goto out; | |
1386 | ||
1387 | /* Look up the VMA for the start of this memory slot */ | |
1388 | hva = memslot->userspace_addr; | |
1389 | down_read(¤t->mm->mmap_sem); | |
1390 | vma = find_vma(current->mm, hva); | |
1391 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) | |
1392 | goto up_out; | |
1393 | ||
1394 | psize = vma_kernel_pagesize(vma); | |
da9d1d7f | 1395 | porder = __ilog2(psize); |
c77162de PM |
1396 | |
1397 | /* Is this one of our preallocated RMAs? */ | |
1398 | if (vma->vm_file && vma->vm_file->f_op == &kvm_rma_fops && | |
1399 | hva == vma->vm_start) | |
1400 | ri = vma->vm_file->private_data; | |
1401 | ||
1402 | up_read(¤t->mm->mmap_sem); | |
1403 | ||
1404 | if (!ri) { | |
1405 | /* On POWER7, use VRMA; on PPC970, give up */ | |
1406 | err = -EPERM; | |
1407 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { | |
1408 | pr_err("KVM: CPU requires an RMO\n"); | |
1409 | goto out; | |
1410 | } | |
1411 | ||
da9d1d7f PM |
1412 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
1413 | err = -EINVAL; | |
1414 | if (!(psize == 0x1000 || psize == 0x10000 || | |
1415 | psize == 0x1000000)) | |
1416 | goto out; | |
1417 | ||
c77162de | 1418 | /* Update VRMASD field in the LPCR */ |
da9d1d7f | 1419 | senc = slb_pgsize_encoding(psize); |
697d3899 PM |
1420 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | |
1421 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
da9d1d7f PM |
1422 | lpcr = kvm->arch.lpcr & ~LPCR_VRMASD; |
1423 | lpcr |= senc << (LPCR_VRMASD_SH - 4); | |
c77162de PM |
1424 | kvm->arch.lpcr = lpcr; |
1425 | ||
1426 | /* Create HPTEs in the hash page table for the VRMA */ | |
da9d1d7f | 1427 | kvmppc_map_vrma(vcpu, memslot, porder); |
c77162de PM |
1428 | |
1429 | } else { | |
1430 | /* Set up to use an RMO region */ | |
1431 | rma_size = ri->npages; | |
1432 | if (rma_size > memslot->npages) | |
1433 | rma_size = memslot->npages; | |
1434 | rma_size <<= PAGE_SHIFT; | |
aa04b4cc | 1435 | rmls = lpcr_rmls(rma_size); |
c77162de | 1436 | err = -EINVAL; |
aa04b4cc | 1437 | if (rmls < 0) { |
c77162de PM |
1438 | pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size); |
1439 | goto out; | |
aa04b4cc PM |
1440 | } |
1441 | atomic_inc(&ri->use_count); | |
1442 | kvm->arch.rma = ri; | |
9e368f29 PM |
1443 | |
1444 | /* Update LPCR and RMOR */ | |
1445 | lpcr = kvm->arch.lpcr; | |
1446 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { | |
1447 | /* PPC970; insert RMLS value (split field) in HID4 */ | |
1448 | lpcr &= ~((1ul << HID4_RMLS0_SH) | | |
1449 | (3ul << HID4_RMLS2_SH)); | |
1450 | lpcr |= ((rmls >> 2) << HID4_RMLS0_SH) | | |
1451 | ((rmls & 3) << HID4_RMLS2_SH); | |
1452 | /* RMOR is also in HID4 */ | |
1453 | lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff) | |
1454 | << HID4_RMOR_SH; | |
1455 | } else { | |
1456 | /* POWER7 */ | |
1457 | lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L); | |
1458 | lpcr |= rmls << LPCR_RMLS_SH; | |
1459 | kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT; | |
1460 | } | |
aa04b4cc | 1461 | kvm->arch.lpcr = lpcr; |
c77162de | 1462 | pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n", |
aa04b4cc | 1463 | ri->base_pfn << PAGE_SHIFT, rma_size, lpcr); |
aa04b4cc | 1464 | |
c77162de | 1465 | /* Initialize phys addrs of pages in RMO */ |
da9d1d7f PM |
1466 | npages = ri->npages; |
1467 | porder = __ilog2(npages); | |
c77162de PM |
1468 | physp = kvm->arch.slot_phys[memslot->id]; |
1469 | spin_lock(&kvm->arch.slot_phys_lock); | |
1470 | for (i = 0; i < npages; ++i) | |
da9d1d7f | 1471 | physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + porder; |
c77162de | 1472 | spin_unlock(&kvm->arch.slot_phys_lock); |
aa04b4cc PM |
1473 | } |
1474 | ||
c77162de PM |
1475 | /* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */ |
1476 | smp_wmb(); | |
1477 | kvm->arch.rma_setup_done = 1; | |
1478 | err = 0; | |
1479 | out: | |
1480 | mutex_unlock(&kvm->lock); | |
1481 | return err; | |
b2b2f165 | 1482 | |
c77162de PM |
1483 | up_out: |
1484 | up_read(¤t->mm->mmap_sem); | |
1485 | goto out; | |
de56a948 PM |
1486 | } |
1487 | ||
1488 | int kvmppc_core_init_vm(struct kvm *kvm) | |
1489 | { | |
32fad281 | 1490 | unsigned long lpcr, lpid; |
de56a948 | 1491 | |
32fad281 PM |
1492 | /* Allocate the guest's logical partition ID */ |
1493 | ||
1494 | lpid = kvmppc_alloc_lpid(); | |
1495 | if (lpid < 0) | |
1496 | return -ENOMEM; | |
1497 | kvm->arch.lpid = lpid; | |
de56a948 | 1498 | |
54738c09 | 1499 | INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables); |
aa04b4cc | 1500 | |
aa04b4cc | 1501 | kvm->arch.rma = NULL; |
aa04b4cc | 1502 | |
9e368f29 | 1503 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
aa04b4cc | 1504 | |
9e368f29 PM |
1505 | if (cpu_has_feature(CPU_FTR_ARCH_201)) { |
1506 | /* PPC970; HID4 is effectively the LPCR */ | |
9e368f29 PM |
1507 | kvm->arch.host_lpid = 0; |
1508 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4); | |
1509 | lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH)); | |
1510 | lpcr |= ((lpid >> 4) << HID4_LPID1_SH) | | |
1511 | ((lpid & 0xf) << HID4_LPID5_SH); | |
1512 | } else { | |
1513 | /* POWER7; init LPCR for virtual RMA mode */ | |
1514 | kvm->arch.host_lpid = mfspr(SPRN_LPID); | |
1515 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); | |
1516 | lpcr &= LPCR_PECE | LPCR_LPES; | |
1517 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | | |
697d3899 PM |
1518 | LPCR_VPM0 | LPCR_VPM1; |
1519 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | | |
1520 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
9e368f29 PM |
1521 | } |
1522 | kvm->arch.lpcr = lpcr; | |
aa04b4cc | 1523 | |
342d3db7 | 1524 | kvm->arch.using_mmu_notifiers = !!cpu_has_feature(CPU_FTR_ARCH_206); |
c77162de | 1525 | spin_lock_init(&kvm->arch.slot_phys_lock); |
54738c09 | 1526 | return 0; |
de56a948 PM |
1527 | } |
1528 | ||
1529 | void kvmppc_core_destroy_vm(struct kvm *kvm) | |
1530 | { | |
aa04b4cc PM |
1531 | unsigned long i; |
1532 | ||
342d3db7 PM |
1533 | if (!kvm->arch.using_mmu_notifiers) |
1534 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) | |
1535 | unpin_slot(kvm, i); | |
b2b2f165 | 1536 | |
aa04b4cc PM |
1537 | if (kvm->arch.rma) { |
1538 | kvm_release_rma(kvm->arch.rma); | |
1539 | kvm->arch.rma = NULL; | |
1540 | } | |
1541 | ||
de56a948 | 1542 | kvmppc_free_hpt(kvm); |
54738c09 | 1543 | WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables)); |
de56a948 PM |
1544 | } |
1545 | ||
1546 | /* These are stubs for now */ | |
1547 | void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end) | |
1548 | { | |
1549 | } | |
1550 | ||
1551 | /* We don't need to emulate any privileged instructions or dcbz */ | |
1552 | int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
1553 | unsigned int inst, int *advance) | |
1554 | { | |
1555 | return EMULATE_FAIL; | |
1556 | } | |
1557 | ||
54771e62 | 1558 | int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val) |
de56a948 PM |
1559 | { |
1560 | return EMULATE_FAIL; | |
1561 | } | |
1562 | ||
54771e62 | 1563 | int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val) |
de56a948 PM |
1564 | { |
1565 | return EMULATE_FAIL; | |
1566 | } | |
1567 | ||
1568 | static int kvmppc_book3s_hv_init(void) | |
1569 | { | |
1570 | int r; | |
1571 | ||
1572 | r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
1573 | ||
1574 | if (r) | |
1575 | return r; | |
1576 | ||
1577 | r = kvmppc_mmu_hv_init(); | |
1578 | ||
1579 | return r; | |
1580 | } | |
1581 | ||
1582 | static void kvmppc_book3s_hv_exit(void) | |
1583 | { | |
1584 | kvm_exit(); | |
1585 | } | |
1586 | ||
1587 | module_init(kvmppc_book3s_hv_init); | |
1588 | module_exit(kvmppc_book3s_hv_exit); |