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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> |
398a76c6 | 34 | #include <linux/miscdevice.h> |
e23a808b | 35 | #include <linux/debugfs.h> |
de56a948 PM |
36 | |
37 | #include <asm/reg.h> | |
38 | #include <asm/cputable.h> | |
9678cdaa | 39 | #include <asm/cache.h> |
de56a948 PM |
40 | #include <asm/cacheflush.h> |
41 | #include <asm/tlbflush.h> | |
42 | #include <asm/uaccess.h> | |
43 | #include <asm/io.h> | |
44 | #include <asm/kvm_ppc.h> | |
45 | #include <asm/kvm_book3s.h> | |
46 | #include <asm/mmu_context.h> | |
47 | #include <asm/lppaca.h> | |
48 | #include <asm/processor.h> | |
371fefd6 | 49 | #include <asm/cputhreads.h> |
aa04b4cc | 50 | #include <asm/page.h> |
de1d9248 | 51 | #include <asm/hvcall.h> |
ae3a197e | 52 | #include <asm/switch_to.h> |
512691d4 | 53 | #include <asm/smp.h> |
66feed61 | 54 | #include <asm/dbell.h> |
de56a948 | 55 | #include <linux/gfp.h> |
de56a948 PM |
56 | #include <linux/vmalloc.h> |
57 | #include <linux/highmem.h> | |
c77162de | 58 | #include <linux/hugetlb.h> |
2ba9f0d8 | 59 | #include <linux/module.h> |
de56a948 | 60 | |
3a167bea AK |
61 | #include "book3s.h" |
62 | ||
3c78f78a SW |
63 | #define CREATE_TRACE_POINTS |
64 | #include "trace_hv.h" | |
65 | ||
de56a948 PM |
66 | /* #define EXIT_DEBUG */ |
67 | /* #define EXIT_DEBUG_SIMPLE */ | |
68 | /* #define EXIT_DEBUG_INT */ | |
69 | ||
913d3ff9 PM |
70 | /* Used to indicate that a guest page fault needs to be handled */ |
71 | #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1) | |
72 | ||
c7b67670 PM |
73 | /* Used as a "null" value for timebase values */ |
74 | #define TB_NIL (~(u64)0) | |
75 | ||
699a0ea0 PM |
76 | static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1); |
77 | ||
9678cdaa SS |
78 | #if defined(CONFIG_PPC_64K_PAGES) |
79 | #define MPP_BUFFER_ORDER 0 | |
80 | #elif defined(CONFIG_PPC_4K_PAGES) | |
81 | #define MPP_BUFFER_ORDER 3 | |
82 | #endif | |
83 | ||
84 | ||
19ccb76a | 85 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
32fad281 | 86 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
19ccb76a | 87 | |
66feed61 PM |
88 | static bool kvmppc_ipi_thread(int cpu) |
89 | { | |
90 | /* On POWER8 for IPIs to threads in the same core, use msgsnd */ | |
91 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) { | |
92 | preempt_disable(); | |
93 | if (cpu_first_thread_sibling(cpu) == | |
94 | cpu_first_thread_sibling(smp_processor_id())) { | |
95 | unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER); | |
96 | msg |= cpu_thread_in_core(cpu); | |
97 | smp_mb(); | |
98 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
99 | preempt_enable(); | |
100 | return true; | |
101 | } | |
102 | preempt_enable(); | |
103 | } | |
104 | ||
105 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) | |
106 | if (cpu >= 0 && cpu < nr_cpu_ids && paca[cpu].kvm_hstate.xics_phys) { | |
107 | xics_wake_cpu(cpu); | |
108 | return true; | |
109 | } | |
110 | #endif | |
111 | ||
112 | return false; | |
113 | } | |
114 | ||
3a167bea | 115 | static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) |
54695c30 | 116 | { |
54695c30 BH |
117 | int cpu = vcpu->cpu; |
118 | wait_queue_head_t *wqp; | |
119 | ||
120 | wqp = kvm_arch_vcpu_wq(vcpu); | |
121 | if (waitqueue_active(wqp)) { | |
122 | wake_up_interruptible(wqp); | |
123 | ++vcpu->stat.halt_wakeup; | |
124 | } | |
125 | ||
66feed61 PM |
126 | if (kvmppc_ipi_thread(cpu + vcpu->arch.ptid)) |
127 | return; | |
54695c30 BH |
128 | |
129 | /* CPU points to the first thread of the core */ | |
66feed61 PM |
130 | if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu)) |
131 | smp_send_reschedule(cpu); | |
54695c30 BH |
132 | } |
133 | ||
c7b67670 PM |
134 | /* |
135 | * We use the vcpu_load/put functions to measure stolen time. | |
136 | * Stolen time is counted as time when either the vcpu is able to | |
137 | * run as part of a virtual core, but the task running the vcore | |
138 | * is preempted or sleeping, or when the vcpu needs something done | |
139 | * in the kernel by the task running the vcpu, but that task is | |
140 | * preempted or sleeping. Those two things have to be counted | |
141 | * separately, since one of the vcpu tasks will take on the job | |
142 | * of running the core, and the other vcpu tasks in the vcore will | |
143 | * sleep waiting for it to do that, but that sleep shouldn't count | |
144 | * as stolen time. | |
145 | * | |
146 | * Hence we accumulate stolen time when the vcpu can run as part of | |
147 | * a vcore using vc->stolen_tb, and the stolen time when the vcpu | |
148 | * needs its task to do other things in the kernel (for example, | |
149 | * service a page fault) in busy_stolen. We don't accumulate | |
150 | * stolen time for a vcore when it is inactive, or for a vcpu | |
151 | * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of | |
152 | * a misnomer; it means that the vcpu task is not executing in | |
153 | * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in | |
154 | * the kernel. We don't have any way of dividing up that time | |
155 | * between time that the vcpu is genuinely stopped, time that | |
156 | * the task is actively working on behalf of the vcpu, and time | |
157 | * that the task is preempted, so we don't count any of it as | |
158 | * stolen. | |
159 | * | |
160 | * Updates to busy_stolen are protected by arch.tbacct_lock; | |
2711e248 PM |
161 | * updates to vc->stolen_tb are protected by the vcore->stoltb_lock |
162 | * lock. The stolen times are measured in units of timebase ticks. | |
163 | * (Note that the != TB_NIL checks below are purely defensive; | |
164 | * they should never fail.) | |
c7b67670 PM |
165 | */ |
166 | ||
3a167bea | 167 | static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu) |
de56a948 | 168 | { |
0456ec4f | 169 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 170 | unsigned long flags; |
0456ec4f | 171 | |
2711e248 PM |
172 | /* |
173 | * We can test vc->runner without taking the vcore lock, | |
174 | * because only this task ever sets vc->runner to this | |
175 | * vcpu, and once it is set to this vcpu, only this task | |
176 | * ever sets it to NULL. | |
177 | */ | |
178 | if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) { | |
179 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
180 | if (vc->preempt_tb != TB_NIL) { | |
181 | vc->stolen_tb += mftb() - vc->preempt_tb; | |
182 | vc->preempt_tb = TB_NIL; | |
183 | } | |
184 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
c7b67670 | 185 | } |
2711e248 | 186 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
c7b67670 PM |
187 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && |
188 | vcpu->arch.busy_preempt != TB_NIL) { | |
189 | vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt; | |
190 | vcpu->arch.busy_preempt = TB_NIL; | |
191 | } | |
bf3d32e1 | 192 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
193 | } |
194 | ||
3a167bea | 195 | static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu) |
de56a948 | 196 | { |
0456ec4f | 197 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 198 | unsigned long flags; |
0456ec4f | 199 | |
2711e248 PM |
200 | if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE) { |
201 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
0456ec4f | 202 | vc->preempt_tb = mftb(); |
2711e248 PM |
203 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); |
204 | } | |
205 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); | |
c7b67670 PM |
206 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
207 | vcpu->arch.busy_preempt = mftb(); | |
bf3d32e1 | 208 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
209 | } |
210 | ||
3a167bea | 211 | static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr) |
de56a948 PM |
212 | { |
213 | vcpu->arch.shregs.msr = msr; | |
19ccb76a | 214 | kvmppc_end_cede(vcpu); |
de56a948 PM |
215 | } |
216 | ||
3a167bea | 217 | void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) |
de56a948 PM |
218 | { |
219 | vcpu->arch.pvr = pvr; | |
220 | } | |
221 | ||
388cc6e1 PM |
222 | int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) |
223 | { | |
224 | unsigned long pcr = 0; | |
225 | struct kvmppc_vcore *vc = vcpu->arch.vcore; | |
226 | ||
227 | if (arch_compat) { | |
388cc6e1 PM |
228 | switch (arch_compat) { |
229 | case PVR_ARCH_205: | |
5557ae0e PM |
230 | /* |
231 | * If an arch bit is set in PCR, all the defined | |
232 | * higher-order arch bits also have to be set. | |
233 | */ | |
234 | pcr = PCR_ARCH_206 | PCR_ARCH_205; | |
388cc6e1 PM |
235 | break; |
236 | case PVR_ARCH_206: | |
237 | case PVR_ARCH_206p: | |
5557ae0e PM |
238 | pcr = PCR_ARCH_206; |
239 | break; | |
240 | case PVR_ARCH_207: | |
388cc6e1 PM |
241 | break; |
242 | default: | |
243 | return -EINVAL; | |
244 | } | |
5557ae0e PM |
245 | |
246 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) { | |
247 | /* POWER7 can't emulate POWER8 */ | |
248 | if (!(pcr & PCR_ARCH_206)) | |
249 | return -EINVAL; | |
250 | pcr &= ~PCR_ARCH_206; | |
251 | } | |
388cc6e1 PM |
252 | } |
253 | ||
254 | spin_lock(&vc->lock); | |
255 | vc->arch_compat = arch_compat; | |
256 | vc->pcr = pcr; | |
257 | spin_unlock(&vc->lock); | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
de56a948 PM |
262 | void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
263 | { | |
264 | int r; | |
265 | ||
266 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); | |
267 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", | |
268 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); | |
269 | for (r = 0; r < 16; ++r) | |
270 | pr_err("r%2d = %.16lx r%d = %.16lx\n", | |
271 | r, kvmppc_get_gpr(vcpu, r), | |
272 | r+16, kvmppc_get_gpr(vcpu, r+16)); | |
273 | pr_err("ctr = %.16lx lr = %.16lx\n", | |
274 | vcpu->arch.ctr, vcpu->arch.lr); | |
275 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", | |
276 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); | |
277 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", | |
278 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); | |
279 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", | |
280 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); | |
281 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", | |
282 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); | |
283 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); | |
284 | pr_err("fault dar = %.16lx dsisr = %.8x\n", | |
285 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
286 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); | |
287 | for (r = 0; r < vcpu->arch.slb_max; ++r) | |
288 | pr_err(" ESID = %.16llx VSID = %.16llx\n", | |
289 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); | |
290 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", | |
a0144e2a | 291 | vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, |
de56a948 PM |
292 | vcpu->arch.last_inst); |
293 | } | |
294 | ||
a8606e20 PM |
295 | struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
296 | { | |
297 | int r; | |
298 | struct kvm_vcpu *v, *ret = NULL; | |
299 | ||
300 | mutex_lock(&kvm->lock); | |
301 | kvm_for_each_vcpu(r, v, kvm) { | |
302 | if (v->vcpu_id == id) { | |
303 | ret = v; | |
304 | break; | |
305 | } | |
306 | } | |
307 | mutex_unlock(&kvm->lock); | |
308 | return ret; | |
309 | } | |
310 | ||
311 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) | |
312 | { | |
f13c13a0 | 313 | vpa->__old_status |= LPPACA_OLD_SHARED_PROC; |
02407552 | 314 | vpa->yield_count = cpu_to_be32(1); |
a8606e20 PM |
315 | } |
316 | ||
55b665b0 PM |
317 | static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, |
318 | unsigned long addr, unsigned long len) | |
319 | { | |
320 | /* check address is cacheline aligned */ | |
321 | if (addr & (L1_CACHE_BYTES - 1)) | |
322 | return -EINVAL; | |
323 | spin_lock(&vcpu->arch.vpa_update_lock); | |
324 | if (v->next_gpa != addr || v->len != len) { | |
325 | v->next_gpa = addr; | |
326 | v->len = addr ? len : 0; | |
327 | v->update_pending = 1; | |
328 | } | |
329 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
330 | return 0; | |
331 | } | |
332 | ||
2e25aa5f PM |
333 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
334 | struct reg_vpa { | |
335 | u32 dummy; | |
336 | union { | |
02407552 AG |
337 | __be16 hword; |
338 | __be32 word; | |
2e25aa5f PM |
339 | } length; |
340 | }; | |
341 | ||
342 | static int vpa_is_registered(struct kvmppc_vpa *vpap) | |
343 | { | |
344 | if (vpap->update_pending) | |
345 | return vpap->next_gpa != 0; | |
346 | return vpap->pinned_addr != NULL; | |
347 | } | |
348 | ||
a8606e20 PM |
349 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
350 | unsigned long flags, | |
351 | unsigned long vcpuid, unsigned long vpa) | |
352 | { | |
353 | struct kvm *kvm = vcpu->kvm; | |
93e60249 | 354 | unsigned long len, nb; |
a8606e20 PM |
355 | void *va; |
356 | struct kvm_vcpu *tvcpu; | |
2e25aa5f PM |
357 | int err; |
358 | int subfunc; | |
359 | struct kvmppc_vpa *vpap; | |
a8606e20 PM |
360 | |
361 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); | |
362 | if (!tvcpu) | |
363 | return H_PARAMETER; | |
364 | ||
2e25aa5f PM |
365 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
366 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || | |
367 | subfunc == H_VPA_REG_SLB) { | |
368 | /* Registering new area - address must be cache-line aligned */ | |
369 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) | |
a8606e20 | 370 | return H_PARAMETER; |
2e25aa5f PM |
371 | |
372 | /* convert logical addr to kernel addr and read length */ | |
93e60249 PM |
373 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
374 | if (va == NULL) | |
b2b2f165 | 375 | return H_PARAMETER; |
2e25aa5f | 376 | if (subfunc == H_VPA_REG_VPA) |
02407552 | 377 | len = be16_to_cpu(((struct reg_vpa *)va)->length.hword); |
a8606e20 | 378 | else |
02407552 | 379 | len = be32_to_cpu(((struct reg_vpa *)va)->length.word); |
c35635ef | 380 | kvmppc_unpin_guest_page(kvm, va, vpa, false); |
2e25aa5f PM |
381 | |
382 | /* Check length */ | |
383 | if (len > nb || len < sizeof(struct reg_vpa)) | |
384 | return H_PARAMETER; | |
385 | } else { | |
386 | vpa = 0; | |
387 | len = 0; | |
388 | } | |
389 | ||
390 | err = H_PARAMETER; | |
391 | vpap = NULL; | |
392 | spin_lock(&tvcpu->arch.vpa_update_lock); | |
393 | ||
394 | switch (subfunc) { | |
395 | case H_VPA_REG_VPA: /* register VPA */ | |
396 | if (len < sizeof(struct lppaca)) | |
a8606e20 | 397 | break; |
2e25aa5f PM |
398 | vpap = &tvcpu->arch.vpa; |
399 | err = 0; | |
400 | break; | |
401 | ||
402 | case H_VPA_REG_DTL: /* register DTL */ | |
403 | if (len < sizeof(struct dtl_entry)) | |
a8606e20 | 404 | break; |
2e25aa5f PM |
405 | len -= len % sizeof(struct dtl_entry); |
406 | ||
407 | /* Check that they have previously registered a VPA */ | |
408 | err = H_RESOURCE; | |
409 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 410 | break; |
2e25aa5f PM |
411 | |
412 | vpap = &tvcpu->arch.dtl; | |
413 | err = 0; | |
414 | break; | |
415 | ||
416 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ | |
417 | /* Check that they have previously registered a VPA */ | |
418 | err = H_RESOURCE; | |
419 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 420 | break; |
2e25aa5f PM |
421 | |
422 | vpap = &tvcpu->arch.slb_shadow; | |
423 | err = 0; | |
424 | break; | |
425 | ||
426 | case H_VPA_DEREG_VPA: /* deregister VPA */ | |
427 | /* Check they don't still have a DTL or SLB buf registered */ | |
428 | err = H_RESOURCE; | |
429 | if (vpa_is_registered(&tvcpu->arch.dtl) || | |
430 | vpa_is_registered(&tvcpu->arch.slb_shadow)) | |
a8606e20 | 431 | break; |
2e25aa5f PM |
432 | |
433 | vpap = &tvcpu->arch.vpa; | |
434 | err = 0; | |
435 | break; | |
436 | ||
437 | case H_VPA_DEREG_DTL: /* deregister DTL */ | |
438 | vpap = &tvcpu->arch.dtl; | |
439 | err = 0; | |
440 | break; | |
441 | ||
442 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ | |
443 | vpap = &tvcpu->arch.slb_shadow; | |
444 | err = 0; | |
445 | break; | |
446 | } | |
447 | ||
448 | if (vpap) { | |
449 | vpap->next_gpa = vpa; | |
450 | vpap->len = len; | |
451 | vpap->update_pending = 1; | |
a8606e20 | 452 | } |
93e60249 | 453 | |
2e25aa5f PM |
454 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
455 | ||
93e60249 | 456 | return err; |
a8606e20 PM |
457 | } |
458 | ||
081f323b | 459 | static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap) |
2e25aa5f | 460 | { |
081f323b | 461 | struct kvm *kvm = vcpu->kvm; |
2e25aa5f PM |
462 | void *va; |
463 | unsigned long nb; | |
081f323b | 464 | unsigned long gpa; |
2e25aa5f | 465 | |
081f323b PM |
466 | /* |
467 | * We need to pin the page pointed to by vpap->next_gpa, | |
468 | * but we can't call kvmppc_pin_guest_page under the lock | |
469 | * as it does get_user_pages() and down_read(). So we | |
470 | * have to drop the lock, pin the page, then get the lock | |
471 | * again and check that a new area didn't get registered | |
472 | * in the meantime. | |
473 | */ | |
474 | for (;;) { | |
475 | gpa = vpap->next_gpa; | |
476 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
477 | va = NULL; | |
478 | nb = 0; | |
479 | if (gpa) | |
c35635ef | 480 | va = kvmppc_pin_guest_page(kvm, gpa, &nb); |
081f323b PM |
481 | spin_lock(&vcpu->arch.vpa_update_lock); |
482 | if (gpa == vpap->next_gpa) | |
483 | break; | |
484 | /* sigh... unpin that one and try again */ | |
485 | if (va) | |
c35635ef | 486 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b PM |
487 | } |
488 | ||
489 | vpap->update_pending = 0; | |
490 | if (va && nb < vpap->len) { | |
491 | /* | |
492 | * If it's now too short, it must be that userspace | |
493 | * has changed the mappings underlying guest memory, | |
494 | * so unregister the region. | |
495 | */ | |
c35635ef | 496 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b | 497 | va = NULL; |
2e25aa5f PM |
498 | } |
499 | if (vpap->pinned_addr) | |
c35635ef PM |
500 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa, |
501 | vpap->dirty); | |
502 | vpap->gpa = gpa; | |
2e25aa5f | 503 | vpap->pinned_addr = va; |
c35635ef | 504 | vpap->dirty = false; |
2e25aa5f PM |
505 | if (va) |
506 | vpap->pinned_end = va + vpap->len; | |
507 | } | |
508 | ||
509 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) | |
510 | { | |
2f12f034 PM |
511 | if (!(vcpu->arch.vpa.update_pending || |
512 | vcpu->arch.slb_shadow.update_pending || | |
513 | vcpu->arch.dtl.update_pending)) | |
514 | return; | |
515 | ||
2e25aa5f PM |
516 | spin_lock(&vcpu->arch.vpa_update_lock); |
517 | if (vcpu->arch.vpa.update_pending) { | |
081f323b | 518 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); |
55b665b0 PM |
519 | if (vcpu->arch.vpa.pinned_addr) |
520 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); | |
2e25aa5f PM |
521 | } |
522 | if (vcpu->arch.dtl.update_pending) { | |
081f323b | 523 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); |
2e25aa5f PM |
524 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
525 | vcpu->arch.dtl_index = 0; | |
526 | } | |
527 | if (vcpu->arch.slb_shadow.update_pending) | |
081f323b | 528 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); |
2e25aa5f PM |
529 | spin_unlock(&vcpu->arch.vpa_update_lock); |
530 | } | |
531 | ||
c7b67670 PM |
532 | /* |
533 | * Return the accumulated stolen time for the vcore up until `now'. | |
534 | * The caller should hold the vcore lock. | |
535 | */ | |
536 | static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) | |
537 | { | |
538 | u64 p; | |
2711e248 | 539 | unsigned long flags; |
c7b67670 | 540 | |
2711e248 PM |
541 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
542 | p = vc->stolen_tb; | |
c7b67670 | 543 | if (vc->vcore_state != VCORE_INACTIVE && |
2711e248 PM |
544 | vc->preempt_tb != TB_NIL) |
545 | p += now - vc->preempt_tb; | |
546 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
c7b67670 PM |
547 | return p; |
548 | } | |
549 | ||
0456ec4f PM |
550 | static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
551 | struct kvmppc_vcore *vc) | |
552 | { | |
553 | struct dtl_entry *dt; | |
554 | struct lppaca *vpa; | |
c7b67670 PM |
555 | unsigned long stolen; |
556 | unsigned long core_stolen; | |
557 | u64 now; | |
0456ec4f PM |
558 | |
559 | dt = vcpu->arch.dtl_ptr; | |
560 | vpa = vcpu->arch.vpa.pinned_addr; | |
c7b67670 PM |
561 | now = mftb(); |
562 | core_stolen = vcore_stolen_time(vc, now); | |
563 | stolen = core_stolen - vcpu->arch.stolen_logged; | |
564 | vcpu->arch.stolen_logged = core_stolen; | |
bf3d32e1 | 565 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
566 | stolen += vcpu->arch.busy_stolen; |
567 | vcpu->arch.busy_stolen = 0; | |
bf3d32e1 | 568 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
0456ec4f PM |
569 | if (!dt || !vpa) |
570 | return; | |
571 | memset(dt, 0, sizeof(struct dtl_entry)); | |
572 | dt->dispatch_reason = 7; | |
02407552 AG |
573 | dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid); |
574 | dt->timebase = cpu_to_be64(now + vc->tb_offset); | |
575 | dt->enqueue_to_dispatch_time = cpu_to_be32(stolen); | |
576 | dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu)); | |
577 | dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr); | |
0456ec4f PM |
578 | ++dt; |
579 | if (dt == vcpu->arch.dtl.pinned_end) | |
580 | dt = vcpu->arch.dtl.pinned_addr; | |
581 | vcpu->arch.dtl_ptr = dt; | |
582 | /* order writing *dt vs. writing vpa->dtl_idx */ | |
583 | smp_wmb(); | |
02407552 | 584 | vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index); |
c35635ef | 585 | vcpu->arch.dtl.dirty = true; |
0456ec4f PM |
586 | } |
587 | ||
9642382e MN |
588 | static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu) |
589 | { | |
590 | if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207) | |
591 | return true; | |
592 | if ((!vcpu->arch.vcore->arch_compat) && | |
593 | cpu_has_feature(CPU_FTR_ARCH_207S)) | |
594 | return true; | |
595 | return false; | |
596 | } | |
597 | ||
598 | static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, | |
599 | unsigned long resource, unsigned long value1, | |
600 | unsigned long value2) | |
601 | { | |
602 | switch (resource) { | |
603 | case H_SET_MODE_RESOURCE_SET_CIABR: | |
604 | if (!kvmppc_power8_compatible(vcpu)) | |
605 | return H_P2; | |
606 | if (value2) | |
607 | return H_P4; | |
608 | if (mflags) | |
609 | return H_UNSUPPORTED_FLAG_START; | |
610 | /* Guests can't breakpoint the hypervisor */ | |
611 | if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
612 | return H_P3; | |
613 | vcpu->arch.ciabr = value1; | |
614 | return H_SUCCESS; | |
615 | case H_SET_MODE_RESOURCE_SET_DAWR: | |
616 | if (!kvmppc_power8_compatible(vcpu)) | |
617 | return H_P2; | |
618 | if (mflags) | |
619 | return H_UNSUPPORTED_FLAG_START; | |
620 | if (value2 & DABRX_HYP) | |
621 | return H_P4; | |
622 | vcpu->arch.dawr = value1; | |
623 | vcpu->arch.dawrx = value2; | |
624 | return H_SUCCESS; | |
625 | default: | |
626 | return H_TOO_HARD; | |
627 | } | |
628 | } | |
629 | ||
90fd09f8 SB |
630 | static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target) |
631 | { | |
632 | struct kvmppc_vcore *vcore = target->arch.vcore; | |
633 | ||
634 | /* | |
635 | * We expect to have been called by the real mode handler | |
636 | * (kvmppc_rm_h_confer()) which would have directly returned | |
637 | * H_SUCCESS if the source vcore wasn't idle (e.g. if it may | |
638 | * have useful work to do and should not confer) so we don't | |
639 | * recheck that here. | |
640 | */ | |
641 | ||
642 | spin_lock(&vcore->lock); | |
643 | if (target->arch.state == KVMPPC_VCPU_RUNNABLE && | |
644 | vcore->vcore_state != VCORE_INACTIVE) | |
645 | target = vcore->runner; | |
646 | spin_unlock(&vcore->lock); | |
647 | ||
648 | return kvm_vcpu_yield_to(target); | |
649 | } | |
650 | ||
651 | static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu) | |
652 | { | |
653 | int yield_count = 0; | |
654 | struct lppaca *lppaca; | |
655 | ||
656 | spin_lock(&vcpu->arch.vpa_update_lock); | |
657 | lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr; | |
658 | if (lppaca) | |
ecb6d618 | 659 | yield_count = be32_to_cpu(lppaca->yield_count); |
90fd09f8 SB |
660 | spin_unlock(&vcpu->arch.vpa_update_lock); |
661 | return yield_count; | |
662 | } | |
663 | ||
a8606e20 PM |
664 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
665 | { | |
666 | unsigned long req = kvmppc_get_gpr(vcpu, 3); | |
667 | unsigned long target, ret = H_SUCCESS; | |
90fd09f8 | 668 | int yield_count; |
a8606e20 | 669 | struct kvm_vcpu *tvcpu; |
8e591cb7 | 670 | int idx, rc; |
a8606e20 | 671 | |
699a0ea0 PM |
672 | if (req <= MAX_HCALL_OPCODE && |
673 | !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls)) | |
674 | return RESUME_HOST; | |
675 | ||
a8606e20 PM |
676 | switch (req) { |
677 | case H_CEDE: | |
a8606e20 PM |
678 | break; |
679 | case H_PROD: | |
680 | target = kvmppc_get_gpr(vcpu, 4); | |
681 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
682 | if (!tvcpu) { | |
683 | ret = H_PARAMETER; | |
684 | break; | |
685 | } | |
686 | tvcpu->arch.prodded = 1; | |
687 | smp_mb(); | |
688 | if (vcpu->arch.ceded) { | |
689 | if (waitqueue_active(&vcpu->wq)) { | |
690 | wake_up_interruptible(&vcpu->wq); | |
691 | vcpu->stat.halt_wakeup++; | |
692 | } | |
693 | } | |
694 | break; | |
695 | case H_CONFER: | |
42d7604d PM |
696 | target = kvmppc_get_gpr(vcpu, 4); |
697 | if (target == -1) | |
698 | break; | |
699 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
700 | if (!tvcpu) { | |
701 | ret = H_PARAMETER; | |
702 | break; | |
703 | } | |
90fd09f8 SB |
704 | yield_count = kvmppc_get_gpr(vcpu, 5); |
705 | if (kvmppc_get_yield_count(tvcpu) != yield_count) | |
706 | break; | |
707 | kvm_arch_vcpu_yield_to(tvcpu); | |
a8606e20 PM |
708 | break; |
709 | case H_REGISTER_VPA: | |
710 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), | |
711 | kvmppc_get_gpr(vcpu, 5), | |
712 | kvmppc_get_gpr(vcpu, 6)); | |
713 | break; | |
8e591cb7 ME |
714 | case H_RTAS: |
715 | if (list_empty(&vcpu->kvm->arch.rtas_tokens)) | |
716 | return RESUME_HOST; | |
717 | ||
c9438092 | 718 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
8e591cb7 | 719 | rc = kvmppc_rtas_hcall(vcpu); |
c9438092 | 720 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8e591cb7 ME |
721 | |
722 | if (rc == -ENOENT) | |
723 | return RESUME_HOST; | |
724 | else if (rc == 0) | |
725 | break; | |
726 | ||
727 | /* Send the error out to userspace via KVM_RUN */ | |
728 | return rc; | |
99342cf8 DG |
729 | case H_LOGICAL_CI_LOAD: |
730 | ret = kvmppc_h_logical_ci_load(vcpu); | |
731 | if (ret == H_TOO_HARD) | |
732 | return RESUME_HOST; | |
733 | break; | |
734 | case H_LOGICAL_CI_STORE: | |
735 | ret = kvmppc_h_logical_ci_store(vcpu); | |
736 | if (ret == H_TOO_HARD) | |
737 | return RESUME_HOST; | |
738 | break; | |
9642382e MN |
739 | case H_SET_MODE: |
740 | ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4), | |
741 | kvmppc_get_gpr(vcpu, 5), | |
742 | kvmppc_get_gpr(vcpu, 6), | |
743 | kvmppc_get_gpr(vcpu, 7)); | |
744 | if (ret == H_TOO_HARD) | |
745 | return RESUME_HOST; | |
746 | break; | |
bc5ad3f3 BH |
747 | case H_XIRR: |
748 | case H_CPPR: | |
749 | case H_EOI: | |
750 | case H_IPI: | |
8e44ddc3 PM |
751 | case H_IPOLL: |
752 | case H_XIRR_X: | |
bc5ad3f3 BH |
753 | if (kvmppc_xics_enabled(vcpu)) { |
754 | ret = kvmppc_xics_hcall(vcpu, req); | |
755 | break; | |
756 | } /* fallthrough */ | |
a8606e20 PM |
757 | default: |
758 | return RESUME_HOST; | |
759 | } | |
760 | kvmppc_set_gpr(vcpu, 3, ret); | |
761 | vcpu->arch.hcall_needed = 0; | |
762 | return RESUME_GUEST; | |
763 | } | |
764 | ||
ae2113a4 PM |
765 | static int kvmppc_hcall_impl_hv(unsigned long cmd) |
766 | { | |
767 | switch (cmd) { | |
768 | case H_CEDE: | |
769 | case H_PROD: | |
770 | case H_CONFER: | |
771 | case H_REGISTER_VPA: | |
9642382e | 772 | case H_SET_MODE: |
99342cf8 DG |
773 | case H_LOGICAL_CI_LOAD: |
774 | case H_LOGICAL_CI_STORE: | |
ae2113a4 PM |
775 | #ifdef CONFIG_KVM_XICS |
776 | case H_XIRR: | |
777 | case H_CPPR: | |
778 | case H_EOI: | |
779 | case H_IPI: | |
780 | case H_IPOLL: | |
781 | case H_XIRR_X: | |
782 | #endif | |
783 | return 1; | |
784 | } | |
785 | ||
786 | /* See if it's in the real-mode table */ | |
787 | return kvmppc_hcall_impl_hv_realmode(cmd); | |
788 | } | |
789 | ||
a59c1d9e MS |
790 | static int kvmppc_emulate_debug_inst(struct kvm_run *run, |
791 | struct kvm_vcpu *vcpu) | |
792 | { | |
793 | u32 last_inst; | |
794 | ||
795 | if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) != | |
796 | EMULATE_DONE) { | |
797 | /* | |
798 | * Fetch failed, so return to guest and | |
799 | * try executing it again. | |
800 | */ | |
801 | return RESUME_GUEST; | |
802 | } | |
803 | ||
804 | if (last_inst == KVMPPC_INST_SW_BREAKPOINT) { | |
805 | run->exit_reason = KVM_EXIT_DEBUG; | |
806 | run->debug.arch.address = kvmppc_get_pc(vcpu); | |
807 | return RESUME_HOST; | |
808 | } else { | |
809 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
810 | return RESUME_GUEST; | |
811 | } | |
812 | } | |
813 | ||
3a167bea AK |
814 | static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, |
815 | struct task_struct *tsk) | |
de56a948 PM |
816 | { |
817 | int r = RESUME_HOST; | |
818 | ||
819 | vcpu->stat.sum_exits++; | |
820 | ||
821 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
822 | run->ready_for_interrupt_injection = 1; | |
823 | switch (vcpu->arch.trap) { | |
824 | /* We're good on these - the host merely wanted to get our attention */ | |
825 | case BOOK3S_INTERRUPT_HV_DECREMENTER: | |
826 | vcpu->stat.dec_exits++; | |
827 | r = RESUME_GUEST; | |
828 | break; | |
829 | case BOOK3S_INTERRUPT_EXTERNAL: | |
5d00f66b | 830 | case BOOK3S_INTERRUPT_H_DOORBELL: |
de56a948 PM |
831 | vcpu->stat.ext_intr_exits++; |
832 | r = RESUME_GUEST; | |
833 | break; | |
dee6f24c MS |
834 | /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/ |
835 | case BOOK3S_INTERRUPT_HMI: | |
de56a948 PM |
836 | case BOOK3S_INTERRUPT_PERFMON: |
837 | r = RESUME_GUEST; | |
838 | break; | |
b4072df4 PM |
839 | case BOOK3S_INTERRUPT_MACHINE_CHECK: |
840 | /* | |
841 | * Deliver a machine check interrupt to the guest. | |
842 | * We have to do this, even if the host has handled the | |
843 | * machine check, because machine checks use SRR0/1 and | |
844 | * the interrupt might have trashed guest state in them. | |
845 | */ | |
846 | kvmppc_book3s_queue_irqprio(vcpu, | |
847 | BOOK3S_INTERRUPT_MACHINE_CHECK); | |
848 | r = RESUME_GUEST; | |
849 | break; | |
de56a948 PM |
850 | case BOOK3S_INTERRUPT_PROGRAM: |
851 | { | |
852 | ulong flags; | |
853 | /* | |
854 | * Normally program interrupts are delivered directly | |
855 | * to the guest by the hardware, but we can get here | |
856 | * as a result of a hypervisor emulation interrupt | |
857 | * (e40) getting turned into a 700 by BML RTAS. | |
858 | */ | |
859 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; | |
860 | kvmppc_core_queue_program(vcpu, flags); | |
861 | r = RESUME_GUEST; | |
862 | break; | |
863 | } | |
864 | case BOOK3S_INTERRUPT_SYSCALL: | |
865 | { | |
866 | /* hcall - punt to userspace */ | |
867 | int i; | |
868 | ||
27025a60 LPF |
869 | /* hypercall with MSR_PR has already been handled in rmode, |
870 | * and never reaches here. | |
871 | */ | |
872 | ||
de56a948 PM |
873 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
874 | for (i = 0; i < 9; ++i) | |
875 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); | |
876 | run->exit_reason = KVM_EXIT_PAPR_HCALL; | |
877 | vcpu->arch.hcall_needed = 1; | |
878 | r = RESUME_HOST; | |
879 | break; | |
880 | } | |
881 | /* | |
342d3db7 PM |
882 | * We get these next two if the guest accesses a page which it thinks |
883 | * it has mapped but which is not actually present, either because | |
884 | * it is for an emulated I/O device or because the corresonding | |
885 | * host page has been paged out. Any other HDSI/HISI interrupts | |
886 | * have been handled already. | |
de56a948 PM |
887 | */ |
888 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: | |
913d3ff9 | 889 | r = RESUME_PAGE_FAULT; |
de56a948 PM |
890 | break; |
891 | case BOOK3S_INTERRUPT_H_INST_STORAGE: | |
913d3ff9 PM |
892 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
893 | vcpu->arch.fault_dsisr = 0; | |
894 | r = RESUME_PAGE_FAULT; | |
de56a948 PM |
895 | break; |
896 | /* | |
897 | * This occurs if the guest executes an illegal instruction. | |
a59c1d9e MS |
898 | * If the guest debug is disabled, generate a program interrupt |
899 | * to the guest. If guest debug is enabled, we need to check | |
900 | * whether the instruction is a software breakpoint instruction. | |
901 | * Accordingly return to Guest or Host. | |
de56a948 PM |
902 | */ |
903 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: | |
4a157d61 PM |
904 | if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED) |
905 | vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ? | |
906 | swab32(vcpu->arch.emul_inst) : | |
907 | vcpu->arch.emul_inst; | |
a59c1d9e MS |
908 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) { |
909 | r = kvmppc_emulate_debug_inst(run, vcpu); | |
910 | } else { | |
911 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
912 | r = RESUME_GUEST; | |
913 | } | |
bd3048b8 ME |
914 | break; |
915 | /* | |
916 | * This occurs if the guest (kernel or userspace), does something that | |
917 | * is prohibited by HFSCR. We just generate a program interrupt to | |
918 | * the guest. | |
919 | */ | |
920 | case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: | |
921 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
de56a948 PM |
922 | r = RESUME_GUEST; |
923 | break; | |
924 | default: | |
925 | kvmppc_dump_regs(vcpu); | |
926 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
927 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
928 | vcpu->arch.shregs.msr); | |
f3271d4c | 929 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
de56a948 | 930 | r = RESUME_HOST; |
de56a948 PM |
931 | break; |
932 | } | |
933 | ||
de56a948 PM |
934 | return r; |
935 | } | |
936 | ||
3a167bea AK |
937 | static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu, |
938 | struct kvm_sregs *sregs) | |
de56a948 PM |
939 | { |
940 | int i; | |
941 | ||
de56a948 | 942 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
87916442 | 943 | sregs->pvr = vcpu->arch.pvr; |
de56a948 PM |
944 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
945 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; | |
946 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; | |
947 | } | |
948 | ||
949 | return 0; | |
950 | } | |
951 | ||
3a167bea AK |
952 | static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, |
953 | struct kvm_sregs *sregs) | |
de56a948 PM |
954 | { |
955 | int i, j; | |
956 | ||
9333e6c4 PM |
957 | /* Only accept the same PVR as the host's, since we can't spoof it */ |
958 | if (sregs->pvr != vcpu->arch.pvr) | |
959 | return -EINVAL; | |
de56a948 PM |
960 | |
961 | j = 0; | |
962 | for (i = 0; i < vcpu->arch.slb_nr; i++) { | |
963 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { | |
964 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; | |
965 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; | |
966 | ++j; | |
967 | } | |
968 | } | |
969 | vcpu->arch.slb_max = j; | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
a0840240 AK |
974 | static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr, |
975 | bool preserve_top32) | |
a0144e2a | 976 | { |
8f902b00 | 977 | struct kvm *kvm = vcpu->kvm; |
a0144e2a PM |
978 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
979 | u64 mask; | |
980 | ||
8f902b00 | 981 | mutex_lock(&kvm->lock); |
a0144e2a | 982 | spin_lock(&vc->lock); |
d682916a AB |
983 | /* |
984 | * If ILE (interrupt little-endian) has changed, update the | |
985 | * MSR_LE bit in the intr_msr for each vcpu in this vcore. | |
986 | */ | |
987 | if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) { | |
d682916a AB |
988 | struct kvm_vcpu *vcpu; |
989 | int i; | |
990 | ||
d682916a AB |
991 | kvm_for_each_vcpu(i, vcpu, kvm) { |
992 | if (vcpu->arch.vcore != vc) | |
993 | continue; | |
994 | if (new_lpcr & LPCR_ILE) | |
995 | vcpu->arch.intr_msr |= MSR_LE; | |
996 | else | |
997 | vcpu->arch.intr_msr &= ~MSR_LE; | |
998 | } | |
d682916a AB |
999 | } |
1000 | ||
a0144e2a PM |
1001 | /* |
1002 | * Userspace can only modify DPFD (default prefetch depth), | |
1003 | * ILE (interrupt little-endian) and TC (translation control). | |
e0622bd9 | 1004 | * On POWER8 userspace can also modify AIL (alt. interrupt loc.) |
a0144e2a PM |
1005 | */ |
1006 | mask = LPCR_DPFD | LPCR_ILE | LPCR_TC; | |
e0622bd9 PM |
1007 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
1008 | mask |= LPCR_AIL; | |
a0840240 AK |
1009 | |
1010 | /* Broken 32-bit version of LPCR must not clear top bits */ | |
1011 | if (preserve_top32) | |
1012 | mask &= 0xFFFFFFFF; | |
a0144e2a PM |
1013 | vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); |
1014 | spin_unlock(&vc->lock); | |
8f902b00 | 1015 | mutex_unlock(&kvm->lock); |
a0144e2a PM |
1016 | } |
1017 | ||
3a167bea AK |
1018 | static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1019 | union kvmppc_one_reg *val) | |
31f3438e | 1020 | { |
a136a8bd PM |
1021 | int r = 0; |
1022 | long int i; | |
31f3438e | 1023 | |
a136a8bd | 1024 | switch (id) { |
a59c1d9e MS |
1025 | case KVM_REG_PPC_DEBUG_INST: |
1026 | *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); | |
1027 | break; | |
31f3438e | 1028 | case KVM_REG_PPC_HIOR: |
a136a8bd PM |
1029 | *val = get_reg_val(id, 0); |
1030 | break; | |
1031 | case KVM_REG_PPC_DABR: | |
1032 | *val = get_reg_val(id, vcpu->arch.dabr); | |
1033 | break; | |
8563bf52 PM |
1034 | case KVM_REG_PPC_DABRX: |
1035 | *val = get_reg_val(id, vcpu->arch.dabrx); | |
1036 | break; | |
a136a8bd PM |
1037 | case KVM_REG_PPC_DSCR: |
1038 | *val = get_reg_val(id, vcpu->arch.dscr); | |
1039 | break; | |
1040 | case KVM_REG_PPC_PURR: | |
1041 | *val = get_reg_val(id, vcpu->arch.purr); | |
1042 | break; | |
1043 | case KVM_REG_PPC_SPURR: | |
1044 | *val = get_reg_val(id, vcpu->arch.spurr); | |
1045 | break; | |
1046 | case KVM_REG_PPC_AMR: | |
1047 | *val = get_reg_val(id, vcpu->arch.amr); | |
1048 | break; | |
1049 | case KVM_REG_PPC_UAMOR: | |
1050 | *val = get_reg_val(id, vcpu->arch.uamor); | |
1051 | break; | |
b005255e | 1052 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1053 | i = id - KVM_REG_PPC_MMCR0; |
1054 | *val = get_reg_val(id, vcpu->arch.mmcr[i]); | |
1055 | break; | |
1056 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1057 | i = id - KVM_REG_PPC_PMC1; | |
1058 | *val = get_reg_val(id, vcpu->arch.pmc[i]); | |
31f3438e | 1059 | break; |
b005255e MN |
1060 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1061 | i = id - KVM_REG_PPC_SPMC1; | |
1062 | *val = get_reg_val(id, vcpu->arch.spmc[i]); | |
1063 | break; | |
14941789 PM |
1064 | case KVM_REG_PPC_SIAR: |
1065 | *val = get_reg_val(id, vcpu->arch.siar); | |
1066 | break; | |
1067 | case KVM_REG_PPC_SDAR: | |
1068 | *val = get_reg_val(id, vcpu->arch.sdar); | |
1069 | break; | |
b005255e MN |
1070 | case KVM_REG_PPC_SIER: |
1071 | *val = get_reg_val(id, vcpu->arch.sier); | |
a8bd19ef | 1072 | break; |
b005255e MN |
1073 | case KVM_REG_PPC_IAMR: |
1074 | *val = get_reg_val(id, vcpu->arch.iamr); | |
1075 | break; | |
b005255e MN |
1076 | case KVM_REG_PPC_PSPB: |
1077 | *val = get_reg_val(id, vcpu->arch.pspb); | |
1078 | break; | |
b005255e MN |
1079 | case KVM_REG_PPC_DPDES: |
1080 | *val = get_reg_val(id, vcpu->arch.vcore->dpdes); | |
1081 | break; | |
1082 | case KVM_REG_PPC_DAWR: | |
1083 | *val = get_reg_val(id, vcpu->arch.dawr); | |
1084 | break; | |
1085 | case KVM_REG_PPC_DAWRX: | |
1086 | *val = get_reg_val(id, vcpu->arch.dawrx); | |
1087 | break; | |
1088 | case KVM_REG_PPC_CIABR: | |
1089 | *val = get_reg_val(id, vcpu->arch.ciabr); | |
1090 | break; | |
b005255e MN |
1091 | case KVM_REG_PPC_CSIGR: |
1092 | *val = get_reg_val(id, vcpu->arch.csigr); | |
1093 | break; | |
1094 | case KVM_REG_PPC_TACR: | |
1095 | *val = get_reg_val(id, vcpu->arch.tacr); | |
1096 | break; | |
1097 | case KVM_REG_PPC_TCSCR: | |
1098 | *val = get_reg_val(id, vcpu->arch.tcscr); | |
1099 | break; | |
1100 | case KVM_REG_PPC_PID: | |
1101 | *val = get_reg_val(id, vcpu->arch.pid); | |
1102 | break; | |
1103 | case KVM_REG_PPC_ACOP: | |
1104 | *val = get_reg_val(id, vcpu->arch.acop); | |
1105 | break; | |
1106 | case KVM_REG_PPC_WORT: | |
1107 | *val = get_reg_val(id, vcpu->arch.wort); | |
a8bd19ef | 1108 | break; |
55b665b0 PM |
1109 | case KVM_REG_PPC_VPA_ADDR: |
1110 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1111 | *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); | |
1112 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1113 | break; | |
1114 | case KVM_REG_PPC_VPA_SLB: | |
1115 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1116 | val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; | |
1117 | val->vpaval.length = vcpu->arch.slb_shadow.len; | |
1118 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1119 | break; | |
1120 | case KVM_REG_PPC_VPA_DTL: | |
1121 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1122 | val->vpaval.addr = vcpu->arch.dtl.next_gpa; | |
1123 | val->vpaval.length = vcpu->arch.dtl.len; | |
1124 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1125 | break; | |
93b0f4dc PM |
1126 | case KVM_REG_PPC_TB_OFFSET: |
1127 | *val = get_reg_val(id, vcpu->arch.vcore->tb_offset); | |
1128 | break; | |
a0144e2a | 1129 | case KVM_REG_PPC_LPCR: |
a0840240 | 1130 | case KVM_REG_PPC_LPCR_64: |
a0144e2a PM |
1131 | *val = get_reg_val(id, vcpu->arch.vcore->lpcr); |
1132 | break; | |
4b8473c9 PM |
1133 | case KVM_REG_PPC_PPR: |
1134 | *val = get_reg_val(id, vcpu->arch.ppr); | |
1135 | break; | |
a7d80d01 MN |
1136 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1137 | case KVM_REG_PPC_TFHAR: | |
1138 | *val = get_reg_val(id, vcpu->arch.tfhar); | |
1139 | break; | |
1140 | case KVM_REG_PPC_TFIAR: | |
1141 | *val = get_reg_val(id, vcpu->arch.tfiar); | |
1142 | break; | |
1143 | case KVM_REG_PPC_TEXASR: | |
1144 | *val = get_reg_val(id, vcpu->arch.texasr); | |
1145 | break; | |
1146 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1147 | i = id - KVM_REG_PPC_TM_GPR0; | |
1148 | *val = get_reg_val(id, vcpu->arch.gpr_tm[i]); | |
1149 | break; | |
1150 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1151 | { | |
1152 | int j; | |
1153 | i = id - KVM_REG_PPC_TM_VSR0; | |
1154 | if (i < 32) | |
1155 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1156 | val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j]; | |
1157 | else { | |
1158 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1159 | val->vval = vcpu->arch.vr_tm.vr[i-32]; | |
1160 | else | |
1161 | r = -ENXIO; | |
1162 | } | |
1163 | break; | |
1164 | } | |
1165 | case KVM_REG_PPC_TM_CR: | |
1166 | *val = get_reg_val(id, vcpu->arch.cr_tm); | |
1167 | break; | |
1168 | case KVM_REG_PPC_TM_LR: | |
1169 | *val = get_reg_val(id, vcpu->arch.lr_tm); | |
1170 | break; | |
1171 | case KVM_REG_PPC_TM_CTR: | |
1172 | *val = get_reg_val(id, vcpu->arch.ctr_tm); | |
1173 | break; | |
1174 | case KVM_REG_PPC_TM_FPSCR: | |
1175 | *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr); | |
1176 | break; | |
1177 | case KVM_REG_PPC_TM_AMR: | |
1178 | *val = get_reg_val(id, vcpu->arch.amr_tm); | |
1179 | break; | |
1180 | case KVM_REG_PPC_TM_PPR: | |
1181 | *val = get_reg_val(id, vcpu->arch.ppr_tm); | |
1182 | break; | |
1183 | case KVM_REG_PPC_TM_VRSAVE: | |
1184 | *val = get_reg_val(id, vcpu->arch.vrsave_tm); | |
1185 | break; | |
1186 | case KVM_REG_PPC_TM_VSCR: | |
1187 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1188 | *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]); | |
1189 | else | |
1190 | r = -ENXIO; | |
1191 | break; | |
1192 | case KVM_REG_PPC_TM_DSCR: | |
1193 | *val = get_reg_val(id, vcpu->arch.dscr_tm); | |
1194 | break; | |
1195 | case KVM_REG_PPC_TM_TAR: | |
1196 | *val = get_reg_val(id, vcpu->arch.tar_tm); | |
1197 | break; | |
1198 | #endif | |
388cc6e1 PM |
1199 | case KVM_REG_PPC_ARCH_COMPAT: |
1200 | *val = get_reg_val(id, vcpu->arch.vcore->arch_compat); | |
1201 | break; | |
31f3438e | 1202 | default: |
a136a8bd | 1203 | r = -EINVAL; |
31f3438e PM |
1204 | break; |
1205 | } | |
1206 | ||
1207 | return r; | |
1208 | } | |
1209 | ||
3a167bea AK |
1210 | static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1211 | union kvmppc_one_reg *val) | |
31f3438e | 1212 | { |
a136a8bd PM |
1213 | int r = 0; |
1214 | long int i; | |
55b665b0 | 1215 | unsigned long addr, len; |
31f3438e | 1216 | |
a136a8bd | 1217 | switch (id) { |
31f3438e | 1218 | case KVM_REG_PPC_HIOR: |
31f3438e | 1219 | /* Only allow this to be set to zero */ |
a136a8bd | 1220 | if (set_reg_val(id, *val)) |
31f3438e PM |
1221 | r = -EINVAL; |
1222 | break; | |
a136a8bd PM |
1223 | case KVM_REG_PPC_DABR: |
1224 | vcpu->arch.dabr = set_reg_val(id, *val); | |
1225 | break; | |
8563bf52 PM |
1226 | case KVM_REG_PPC_DABRX: |
1227 | vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP; | |
1228 | break; | |
a136a8bd PM |
1229 | case KVM_REG_PPC_DSCR: |
1230 | vcpu->arch.dscr = set_reg_val(id, *val); | |
1231 | break; | |
1232 | case KVM_REG_PPC_PURR: | |
1233 | vcpu->arch.purr = set_reg_val(id, *val); | |
1234 | break; | |
1235 | case KVM_REG_PPC_SPURR: | |
1236 | vcpu->arch.spurr = set_reg_val(id, *val); | |
1237 | break; | |
1238 | case KVM_REG_PPC_AMR: | |
1239 | vcpu->arch.amr = set_reg_val(id, *val); | |
1240 | break; | |
1241 | case KVM_REG_PPC_UAMOR: | |
1242 | vcpu->arch.uamor = set_reg_val(id, *val); | |
1243 | break; | |
b005255e | 1244 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1245 | i = id - KVM_REG_PPC_MMCR0; |
1246 | vcpu->arch.mmcr[i] = set_reg_val(id, *val); | |
1247 | break; | |
1248 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1249 | i = id - KVM_REG_PPC_PMC1; | |
1250 | vcpu->arch.pmc[i] = set_reg_val(id, *val); | |
1251 | break; | |
b005255e MN |
1252 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1253 | i = id - KVM_REG_PPC_SPMC1; | |
1254 | vcpu->arch.spmc[i] = set_reg_val(id, *val); | |
1255 | break; | |
14941789 PM |
1256 | case KVM_REG_PPC_SIAR: |
1257 | vcpu->arch.siar = set_reg_val(id, *val); | |
1258 | break; | |
1259 | case KVM_REG_PPC_SDAR: | |
1260 | vcpu->arch.sdar = set_reg_val(id, *val); | |
1261 | break; | |
b005255e MN |
1262 | case KVM_REG_PPC_SIER: |
1263 | vcpu->arch.sier = set_reg_val(id, *val); | |
a8bd19ef | 1264 | break; |
b005255e MN |
1265 | case KVM_REG_PPC_IAMR: |
1266 | vcpu->arch.iamr = set_reg_val(id, *val); | |
1267 | break; | |
b005255e MN |
1268 | case KVM_REG_PPC_PSPB: |
1269 | vcpu->arch.pspb = set_reg_val(id, *val); | |
1270 | break; | |
b005255e MN |
1271 | case KVM_REG_PPC_DPDES: |
1272 | vcpu->arch.vcore->dpdes = set_reg_val(id, *val); | |
1273 | break; | |
1274 | case KVM_REG_PPC_DAWR: | |
1275 | vcpu->arch.dawr = set_reg_val(id, *val); | |
1276 | break; | |
1277 | case KVM_REG_PPC_DAWRX: | |
1278 | vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP; | |
1279 | break; | |
1280 | case KVM_REG_PPC_CIABR: | |
1281 | vcpu->arch.ciabr = set_reg_val(id, *val); | |
1282 | /* Don't allow setting breakpoints in hypervisor code */ | |
1283 | if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
1284 | vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */ | |
1285 | break; | |
b005255e MN |
1286 | case KVM_REG_PPC_CSIGR: |
1287 | vcpu->arch.csigr = set_reg_val(id, *val); | |
1288 | break; | |
1289 | case KVM_REG_PPC_TACR: | |
1290 | vcpu->arch.tacr = set_reg_val(id, *val); | |
1291 | break; | |
1292 | case KVM_REG_PPC_TCSCR: | |
1293 | vcpu->arch.tcscr = set_reg_val(id, *val); | |
1294 | break; | |
1295 | case KVM_REG_PPC_PID: | |
1296 | vcpu->arch.pid = set_reg_val(id, *val); | |
1297 | break; | |
1298 | case KVM_REG_PPC_ACOP: | |
1299 | vcpu->arch.acop = set_reg_val(id, *val); | |
1300 | break; | |
1301 | case KVM_REG_PPC_WORT: | |
1302 | vcpu->arch.wort = set_reg_val(id, *val); | |
a8bd19ef | 1303 | break; |
55b665b0 PM |
1304 | case KVM_REG_PPC_VPA_ADDR: |
1305 | addr = set_reg_val(id, *val); | |
1306 | r = -EINVAL; | |
1307 | if (!addr && (vcpu->arch.slb_shadow.next_gpa || | |
1308 | vcpu->arch.dtl.next_gpa)) | |
1309 | break; | |
1310 | r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); | |
1311 | break; | |
1312 | case KVM_REG_PPC_VPA_SLB: | |
1313 | addr = val->vpaval.addr; | |
1314 | len = val->vpaval.length; | |
1315 | r = -EINVAL; | |
1316 | if (addr && !vcpu->arch.vpa.next_gpa) | |
1317 | break; | |
1318 | r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); | |
1319 | break; | |
1320 | case KVM_REG_PPC_VPA_DTL: | |
1321 | addr = val->vpaval.addr; | |
1322 | len = val->vpaval.length; | |
1323 | r = -EINVAL; | |
9f8c8c78 PM |
1324 | if (addr && (len < sizeof(struct dtl_entry) || |
1325 | !vcpu->arch.vpa.next_gpa)) | |
55b665b0 PM |
1326 | break; |
1327 | len -= len % sizeof(struct dtl_entry); | |
1328 | r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); | |
1329 | break; | |
93b0f4dc PM |
1330 | case KVM_REG_PPC_TB_OFFSET: |
1331 | /* round up to multiple of 2^24 */ | |
1332 | vcpu->arch.vcore->tb_offset = | |
1333 | ALIGN(set_reg_val(id, *val), 1UL << 24); | |
1334 | break; | |
a0144e2a | 1335 | case KVM_REG_PPC_LPCR: |
a0840240 AK |
1336 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true); |
1337 | break; | |
1338 | case KVM_REG_PPC_LPCR_64: | |
1339 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false); | |
a0144e2a | 1340 | break; |
4b8473c9 PM |
1341 | case KVM_REG_PPC_PPR: |
1342 | vcpu->arch.ppr = set_reg_val(id, *val); | |
1343 | break; | |
a7d80d01 MN |
1344 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1345 | case KVM_REG_PPC_TFHAR: | |
1346 | vcpu->arch.tfhar = set_reg_val(id, *val); | |
1347 | break; | |
1348 | case KVM_REG_PPC_TFIAR: | |
1349 | vcpu->arch.tfiar = set_reg_val(id, *val); | |
1350 | break; | |
1351 | case KVM_REG_PPC_TEXASR: | |
1352 | vcpu->arch.texasr = set_reg_val(id, *val); | |
1353 | break; | |
1354 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1355 | i = id - KVM_REG_PPC_TM_GPR0; | |
1356 | vcpu->arch.gpr_tm[i] = set_reg_val(id, *val); | |
1357 | break; | |
1358 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1359 | { | |
1360 | int j; | |
1361 | i = id - KVM_REG_PPC_TM_VSR0; | |
1362 | if (i < 32) | |
1363 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1364 | vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j]; | |
1365 | else | |
1366 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1367 | vcpu->arch.vr_tm.vr[i-32] = val->vval; | |
1368 | else | |
1369 | r = -ENXIO; | |
1370 | break; | |
1371 | } | |
1372 | case KVM_REG_PPC_TM_CR: | |
1373 | vcpu->arch.cr_tm = set_reg_val(id, *val); | |
1374 | break; | |
1375 | case KVM_REG_PPC_TM_LR: | |
1376 | vcpu->arch.lr_tm = set_reg_val(id, *val); | |
1377 | break; | |
1378 | case KVM_REG_PPC_TM_CTR: | |
1379 | vcpu->arch.ctr_tm = set_reg_val(id, *val); | |
1380 | break; | |
1381 | case KVM_REG_PPC_TM_FPSCR: | |
1382 | vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val); | |
1383 | break; | |
1384 | case KVM_REG_PPC_TM_AMR: | |
1385 | vcpu->arch.amr_tm = set_reg_val(id, *val); | |
1386 | break; | |
1387 | case KVM_REG_PPC_TM_PPR: | |
1388 | vcpu->arch.ppr_tm = set_reg_val(id, *val); | |
1389 | break; | |
1390 | case KVM_REG_PPC_TM_VRSAVE: | |
1391 | vcpu->arch.vrsave_tm = set_reg_val(id, *val); | |
1392 | break; | |
1393 | case KVM_REG_PPC_TM_VSCR: | |
1394 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1395 | vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val); | |
1396 | else | |
1397 | r = - ENXIO; | |
1398 | break; | |
1399 | case KVM_REG_PPC_TM_DSCR: | |
1400 | vcpu->arch.dscr_tm = set_reg_val(id, *val); | |
1401 | break; | |
1402 | case KVM_REG_PPC_TM_TAR: | |
1403 | vcpu->arch.tar_tm = set_reg_val(id, *val); | |
1404 | break; | |
1405 | #endif | |
388cc6e1 PM |
1406 | case KVM_REG_PPC_ARCH_COMPAT: |
1407 | r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val)); | |
1408 | break; | |
31f3438e | 1409 | default: |
a136a8bd | 1410 | r = -EINVAL; |
31f3438e PM |
1411 | break; |
1412 | } | |
1413 | ||
1414 | return r; | |
1415 | } | |
1416 | ||
de9bdd1a SS |
1417 | static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core) |
1418 | { | |
1419 | struct kvmppc_vcore *vcore; | |
1420 | ||
1421 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); | |
1422 | ||
1423 | if (vcore == NULL) | |
1424 | return NULL; | |
1425 | ||
1426 | INIT_LIST_HEAD(&vcore->runnable_threads); | |
1427 | spin_lock_init(&vcore->lock); | |
2711e248 | 1428 | spin_lock_init(&vcore->stoltb_lock); |
de9bdd1a SS |
1429 | init_waitqueue_head(&vcore->wq); |
1430 | vcore->preempt_tb = TB_NIL; | |
1431 | vcore->lpcr = kvm->arch.lpcr; | |
1432 | vcore->first_vcpuid = core * threads_per_subcore; | |
1433 | vcore->kvm = kvm; | |
1434 | ||
9678cdaa SS |
1435 | vcore->mpp_buffer_is_valid = false; |
1436 | ||
1437 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
1438 | vcore->mpp_buffer = (void *)__get_free_pages( | |
1439 | GFP_KERNEL|__GFP_ZERO, | |
1440 | MPP_BUFFER_ORDER); | |
1441 | ||
de9bdd1a SS |
1442 | return vcore; |
1443 | } | |
1444 | ||
b6c295df PM |
1445 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
1446 | static struct debugfs_timings_element { | |
1447 | const char *name; | |
1448 | size_t offset; | |
1449 | } timings[] = { | |
1450 | {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)}, | |
1451 | {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)}, | |
1452 | {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)}, | |
1453 | {"guest", offsetof(struct kvm_vcpu, arch.guest_time)}, | |
1454 | {"cede", offsetof(struct kvm_vcpu, arch.cede_time)}, | |
1455 | }; | |
1456 | ||
1457 | #define N_TIMINGS (sizeof(timings) / sizeof(timings[0])) | |
1458 | ||
1459 | struct debugfs_timings_state { | |
1460 | struct kvm_vcpu *vcpu; | |
1461 | unsigned int buflen; | |
1462 | char buf[N_TIMINGS * 100]; | |
1463 | }; | |
1464 | ||
1465 | static int debugfs_timings_open(struct inode *inode, struct file *file) | |
1466 | { | |
1467 | struct kvm_vcpu *vcpu = inode->i_private; | |
1468 | struct debugfs_timings_state *p; | |
1469 | ||
1470 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
1471 | if (!p) | |
1472 | return -ENOMEM; | |
1473 | ||
1474 | kvm_get_kvm(vcpu->kvm); | |
1475 | p->vcpu = vcpu; | |
1476 | file->private_data = p; | |
1477 | ||
1478 | return nonseekable_open(inode, file); | |
1479 | } | |
1480 | ||
1481 | static int debugfs_timings_release(struct inode *inode, struct file *file) | |
1482 | { | |
1483 | struct debugfs_timings_state *p = file->private_data; | |
1484 | ||
1485 | kvm_put_kvm(p->vcpu->kvm); | |
1486 | kfree(p); | |
1487 | return 0; | |
1488 | } | |
1489 | ||
1490 | static ssize_t debugfs_timings_read(struct file *file, char __user *buf, | |
1491 | size_t len, loff_t *ppos) | |
1492 | { | |
1493 | struct debugfs_timings_state *p = file->private_data; | |
1494 | struct kvm_vcpu *vcpu = p->vcpu; | |
1495 | char *s, *buf_end; | |
1496 | struct kvmhv_tb_accumulator tb; | |
1497 | u64 count; | |
1498 | loff_t pos; | |
1499 | ssize_t n; | |
1500 | int i, loops; | |
1501 | bool ok; | |
1502 | ||
1503 | if (!p->buflen) { | |
1504 | s = p->buf; | |
1505 | buf_end = s + sizeof(p->buf); | |
1506 | for (i = 0; i < N_TIMINGS; ++i) { | |
1507 | struct kvmhv_tb_accumulator *acc; | |
1508 | ||
1509 | acc = (struct kvmhv_tb_accumulator *) | |
1510 | ((unsigned long)vcpu + timings[i].offset); | |
1511 | ok = false; | |
1512 | for (loops = 0; loops < 1000; ++loops) { | |
1513 | count = acc->seqcount; | |
1514 | if (!(count & 1)) { | |
1515 | smp_rmb(); | |
1516 | tb = *acc; | |
1517 | smp_rmb(); | |
1518 | if (count == acc->seqcount) { | |
1519 | ok = true; | |
1520 | break; | |
1521 | } | |
1522 | } | |
1523 | udelay(1); | |
1524 | } | |
1525 | if (!ok) | |
1526 | snprintf(s, buf_end - s, "%s: stuck\n", | |
1527 | timings[i].name); | |
1528 | else | |
1529 | snprintf(s, buf_end - s, | |
1530 | "%s: %llu %llu %llu %llu\n", | |
1531 | timings[i].name, count / 2, | |
1532 | tb_to_ns(tb.tb_total), | |
1533 | tb_to_ns(tb.tb_min), | |
1534 | tb_to_ns(tb.tb_max)); | |
1535 | s += strlen(s); | |
1536 | } | |
1537 | p->buflen = s - p->buf; | |
1538 | } | |
1539 | ||
1540 | pos = *ppos; | |
1541 | if (pos >= p->buflen) | |
1542 | return 0; | |
1543 | if (len > p->buflen - pos) | |
1544 | len = p->buflen - pos; | |
1545 | n = copy_to_user(buf, p->buf + pos, len); | |
1546 | if (n) { | |
1547 | if (n == len) | |
1548 | return -EFAULT; | |
1549 | len -= n; | |
1550 | } | |
1551 | *ppos = pos + len; | |
1552 | return len; | |
1553 | } | |
1554 | ||
1555 | static ssize_t debugfs_timings_write(struct file *file, const char __user *buf, | |
1556 | size_t len, loff_t *ppos) | |
1557 | { | |
1558 | return -EACCES; | |
1559 | } | |
1560 | ||
1561 | static const struct file_operations debugfs_timings_ops = { | |
1562 | .owner = THIS_MODULE, | |
1563 | .open = debugfs_timings_open, | |
1564 | .release = debugfs_timings_release, | |
1565 | .read = debugfs_timings_read, | |
1566 | .write = debugfs_timings_write, | |
1567 | .llseek = generic_file_llseek, | |
1568 | }; | |
1569 | ||
1570 | /* Create a debugfs directory for the vcpu */ | |
1571 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1572 | { | |
1573 | char buf[16]; | |
1574 | struct kvm *kvm = vcpu->kvm; | |
1575 | ||
1576 | snprintf(buf, sizeof(buf), "vcpu%u", id); | |
1577 | if (IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
1578 | return; | |
1579 | vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir); | |
1580 | if (IS_ERR_OR_NULL(vcpu->arch.debugfs_dir)) | |
1581 | return; | |
1582 | vcpu->arch.debugfs_timings = | |
1583 | debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir, | |
1584 | vcpu, &debugfs_timings_ops); | |
1585 | } | |
1586 | ||
1587 | #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1588 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1589 | { | |
1590 | } | |
1591 | #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1592 | ||
3a167bea AK |
1593 | static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm, |
1594 | unsigned int id) | |
de56a948 PM |
1595 | { |
1596 | struct kvm_vcpu *vcpu; | |
371fefd6 PM |
1597 | int err = -EINVAL; |
1598 | int core; | |
1599 | struct kvmppc_vcore *vcore; | |
de56a948 | 1600 | |
3102f784 | 1601 | core = id / threads_per_subcore; |
371fefd6 PM |
1602 | if (core >= KVM_MAX_VCORES) |
1603 | goto out; | |
1604 | ||
1605 | err = -ENOMEM; | |
6b75e6bf | 1606 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
de56a948 PM |
1607 | if (!vcpu) |
1608 | goto out; | |
1609 | ||
1610 | err = kvm_vcpu_init(vcpu, kvm, id); | |
1611 | if (err) | |
1612 | goto free_vcpu; | |
1613 | ||
1614 | vcpu->arch.shared = &vcpu->arch.shregs; | |
5deb8e7a AG |
1615 | #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE |
1616 | /* | |
1617 | * The shared struct is never shared on HV, | |
1618 | * so we can always use host endianness | |
1619 | */ | |
1620 | #ifdef __BIG_ENDIAN__ | |
1621 | vcpu->arch.shared_big_endian = true; | |
1622 | #else | |
1623 | vcpu->arch.shared_big_endian = false; | |
1624 | #endif | |
1625 | #endif | |
de56a948 PM |
1626 | vcpu->arch.mmcr[0] = MMCR0_FC; |
1627 | vcpu->arch.ctrl = CTRL_RUNLATCH; | |
1628 | /* default to host PVR, since we can't spoof it */ | |
3a167bea | 1629 | kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR)); |
2e25aa5f | 1630 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
c7b67670 PM |
1631 | spin_lock_init(&vcpu->arch.tbacct_lock); |
1632 | vcpu->arch.busy_preempt = TB_NIL; | |
d682916a | 1633 | vcpu->arch.intr_msr = MSR_SF | MSR_ME; |
de56a948 | 1634 | |
de56a948 PM |
1635 | kvmppc_mmu_book3s_hv_init(vcpu); |
1636 | ||
8455d79e | 1637 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
371fefd6 PM |
1638 | |
1639 | init_waitqueue_head(&vcpu->arch.cpu_run); | |
1640 | ||
1641 | mutex_lock(&kvm->lock); | |
1642 | vcore = kvm->arch.vcores[core]; | |
1643 | if (!vcore) { | |
de9bdd1a | 1644 | vcore = kvmppc_vcore_create(kvm, core); |
371fefd6 | 1645 | kvm->arch.vcores[core] = vcore; |
1b400ba0 | 1646 | kvm->arch.online_vcores++; |
371fefd6 PM |
1647 | } |
1648 | mutex_unlock(&kvm->lock); | |
1649 | ||
1650 | if (!vcore) | |
1651 | goto free_vcpu; | |
1652 | ||
1653 | spin_lock(&vcore->lock); | |
1654 | ++vcore->num_threads; | |
371fefd6 PM |
1655 | spin_unlock(&vcore->lock); |
1656 | vcpu->arch.vcore = vcore; | |
e0b7ec05 | 1657 | vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid; |
371fefd6 | 1658 | |
af8f38b3 AG |
1659 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
1660 | kvmppc_sanity_check(vcpu); | |
1661 | ||
b6c295df PM |
1662 | debugfs_vcpu_init(vcpu, id); |
1663 | ||
de56a948 PM |
1664 | return vcpu; |
1665 | ||
1666 | free_vcpu: | |
6b75e6bf | 1667 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1668 | out: |
1669 | return ERR_PTR(err); | |
1670 | } | |
1671 | ||
c35635ef PM |
1672 | static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) |
1673 | { | |
1674 | if (vpa->pinned_addr) | |
1675 | kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa, | |
1676 | vpa->dirty); | |
1677 | } | |
1678 | ||
3a167bea | 1679 | static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) |
de56a948 | 1680 | { |
2e25aa5f | 1681 | spin_lock(&vcpu->arch.vpa_update_lock); |
c35635ef PM |
1682 | unpin_vpa(vcpu->kvm, &vcpu->arch.dtl); |
1683 | unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow); | |
1684 | unpin_vpa(vcpu->kvm, &vcpu->arch.vpa); | |
2e25aa5f | 1685 | spin_unlock(&vcpu->arch.vpa_update_lock); |
de56a948 | 1686 | kvm_vcpu_uninit(vcpu); |
6b75e6bf | 1687 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1688 | } |
1689 | ||
3a167bea AK |
1690 | static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu) |
1691 | { | |
1692 | /* Indicate we want to get back into the guest */ | |
1693 | return 1; | |
1694 | } | |
1695 | ||
19ccb76a | 1696 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
371fefd6 | 1697 | { |
19ccb76a | 1698 | unsigned long dec_nsec, now; |
371fefd6 | 1699 | |
19ccb76a PM |
1700 | now = get_tb(); |
1701 | if (now > vcpu->arch.dec_expires) { | |
1702 | /* decrementer has already gone negative */ | |
1703 | kvmppc_core_queue_dec(vcpu); | |
7e28e60e | 1704 | kvmppc_core_prepare_to_enter(vcpu); |
19ccb76a | 1705 | return; |
371fefd6 | 1706 | } |
19ccb76a PM |
1707 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
1708 | / tb_ticks_per_sec; | |
1709 | hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), | |
1710 | HRTIMER_MODE_REL); | |
1711 | vcpu->arch.timer_running = 1; | |
371fefd6 PM |
1712 | } |
1713 | ||
19ccb76a | 1714 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
371fefd6 | 1715 | { |
19ccb76a PM |
1716 | vcpu->arch.ceded = 0; |
1717 | if (vcpu->arch.timer_running) { | |
1718 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1719 | vcpu->arch.timer_running = 0; | |
1720 | } | |
371fefd6 PM |
1721 | } |
1722 | ||
e0b7ec05 | 1723 | extern void __kvmppc_vcore_entry(void); |
de56a948 | 1724 | |
371fefd6 PM |
1725 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
1726 | struct kvm_vcpu *vcpu) | |
de56a948 | 1727 | { |
c7b67670 PM |
1728 | u64 now; |
1729 | ||
371fefd6 PM |
1730 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
1731 | return; | |
bf3d32e1 | 1732 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
1733 | now = mftb(); |
1734 | vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - | |
1735 | vcpu->arch.stolen_logged; | |
1736 | vcpu->arch.busy_preempt = now; | |
1737 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; | |
bf3d32e1 | 1738 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
371fefd6 | 1739 | --vc->n_runnable; |
371fefd6 PM |
1740 | list_del(&vcpu->arch.run_list); |
1741 | } | |
1742 | ||
f0888f70 PM |
1743 | static int kvmppc_grab_hwthread(int cpu) |
1744 | { | |
1745 | struct paca_struct *tpaca; | |
b754c739 | 1746 | long timeout = 10000; |
f0888f70 PM |
1747 | |
1748 | tpaca = &paca[cpu]; | |
1749 | ||
1750 | /* Ensure the thread won't go into the kernel if it wakes */ | |
7b444c67 | 1751 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
5d5b99cd PM |
1752 | tpaca->kvm_hstate.napping = 0; |
1753 | smp_wmb(); | |
1754 | tpaca->kvm_hstate.hwthread_req = 1; | |
f0888f70 PM |
1755 | |
1756 | /* | |
1757 | * If the thread is already executing in the kernel (e.g. handling | |
1758 | * a stray interrupt), wait for it to get back to nap mode. | |
1759 | * The smp_mb() is to ensure that our setting of hwthread_req | |
1760 | * is visible before we look at hwthread_state, so if this | |
1761 | * races with the code at system_reset_pSeries and the thread | |
1762 | * misses our setting of hwthread_req, we are sure to see its | |
1763 | * setting of hwthread_state, and vice versa. | |
1764 | */ | |
1765 | smp_mb(); | |
1766 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { | |
1767 | if (--timeout <= 0) { | |
1768 | pr_err("KVM: couldn't grab cpu %d\n", cpu); | |
1769 | return -EBUSY; | |
1770 | } | |
1771 | udelay(1); | |
1772 | } | |
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | static void kvmppc_release_hwthread(int cpu) | |
1777 | { | |
1778 | struct paca_struct *tpaca; | |
1779 | ||
1780 | tpaca = &paca[cpu]; | |
1781 | tpaca->kvm_hstate.hwthread_req = 0; | |
1782 | tpaca->kvm_hstate.kvm_vcpu = NULL; | |
1783 | } | |
1784 | ||
371fefd6 PM |
1785 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu) |
1786 | { | |
1787 | int cpu; | |
1788 | struct paca_struct *tpaca; | |
1789 | struct kvmppc_vcore *vc = vcpu->arch.vcore; | |
1790 | ||
19ccb76a PM |
1791 | if (vcpu->arch.timer_running) { |
1792 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1793 | vcpu->arch.timer_running = 0; | |
1794 | } | |
371fefd6 PM |
1795 | cpu = vc->pcpu + vcpu->arch.ptid; |
1796 | tpaca = &paca[cpu]; | |
371fefd6 | 1797 | tpaca->kvm_hstate.kvm_vcore = vc; |
e0b7ec05 | 1798 | tpaca->kvm_hstate.ptid = vcpu->arch.ptid; |
19ccb76a | 1799 | vcpu->cpu = vc->pcpu; |
5d5b99cd | 1800 | /* Order stores to hstate.kvm_vcore etc. before store to kvm_vcpu */ |
371fefd6 | 1801 | smp_wmb(); |
5d5b99cd | 1802 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
5d5b99cd | 1803 | if (cpu != smp_processor_id()) |
66feed61 | 1804 | kvmppc_ipi_thread(cpu); |
371fefd6 | 1805 | } |
de56a948 | 1806 | |
5d5b99cd | 1807 | static void kvmppc_wait_for_nap(void) |
371fefd6 | 1808 | { |
5d5b99cd PM |
1809 | int cpu = smp_processor_id(); |
1810 | int i, loops; | |
371fefd6 | 1811 | |
5d5b99cd PM |
1812 | for (loops = 0; loops < 1000000; ++loops) { |
1813 | /* | |
1814 | * Check if all threads are finished. | |
1815 | * We set the vcpu pointer when starting a thread | |
1816 | * and the thread clears it when finished, so we look | |
1817 | * for any threads that still have a non-NULL vcpu ptr. | |
1818 | */ | |
1819 | for (i = 1; i < threads_per_subcore; ++i) | |
1820 | if (paca[cpu + i].kvm_hstate.kvm_vcpu) | |
1821 | break; | |
1822 | if (i == threads_per_subcore) { | |
1823 | HMT_medium(); | |
1824 | return; | |
371fefd6 | 1825 | } |
5d5b99cd | 1826 | HMT_low(); |
371fefd6 PM |
1827 | } |
1828 | HMT_medium(); | |
5d5b99cd PM |
1829 | for (i = 1; i < threads_per_subcore; ++i) |
1830 | if (paca[cpu + i].kvm_hstate.kvm_vcpu) | |
1831 | pr_err("KVM: CPU %d seems to be stuck\n", cpu + i); | |
371fefd6 PM |
1832 | } |
1833 | ||
1834 | /* | |
1835 | * Check that we are on thread 0 and that any other threads in | |
7b444c67 PM |
1836 | * this core are off-line. Then grab the threads so they can't |
1837 | * enter the kernel. | |
371fefd6 PM |
1838 | */ |
1839 | static int on_primary_thread(void) | |
1840 | { | |
1841 | int cpu = smp_processor_id(); | |
3102f784 | 1842 | int thr; |
371fefd6 | 1843 | |
3102f784 ME |
1844 | /* Are we on a primary subcore? */ |
1845 | if (cpu_thread_in_subcore(cpu)) | |
371fefd6 | 1846 | return 0; |
3102f784 ME |
1847 | |
1848 | thr = 0; | |
1849 | while (++thr < threads_per_subcore) | |
371fefd6 PM |
1850 | if (cpu_online(cpu + thr)) |
1851 | return 0; | |
7b444c67 PM |
1852 | |
1853 | /* Grab all hw threads so they can't go into the kernel */ | |
3102f784 | 1854 | for (thr = 1; thr < threads_per_subcore; ++thr) { |
7b444c67 PM |
1855 | if (kvmppc_grab_hwthread(cpu + thr)) { |
1856 | /* Couldn't grab one; let the others go */ | |
1857 | do { | |
1858 | kvmppc_release_hwthread(cpu + thr); | |
1859 | } while (--thr > 0); | |
1860 | return 0; | |
1861 | } | |
1862 | } | |
371fefd6 PM |
1863 | return 1; |
1864 | } | |
1865 | ||
9678cdaa SS |
1866 | static void kvmppc_start_saving_l2_cache(struct kvmppc_vcore *vc) |
1867 | { | |
1868 | phys_addr_t phy_addr, mpp_addr; | |
1869 | ||
1870 | phy_addr = (phys_addr_t)virt_to_phys(vc->mpp_buffer); | |
1871 | mpp_addr = phy_addr & PPC_MPPE_ADDRESS_MASK; | |
1872 | ||
1873 | mtspr(SPRN_MPPR, mpp_addr | PPC_MPPR_FETCH_ABORT); | |
1874 | logmpp(mpp_addr | PPC_LOGMPP_LOG_L2); | |
1875 | ||
1876 | vc->mpp_buffer_is_valid = true; | |
1877 | } | |
1878 | ||
1879 | static void kvmppc_start_restoring_l2_cache(const struct kvmppc_vcore *vc) | |
1880 | { | |
1881 | phys_addr_t phy_addr, mpp_addr; | |
1882 | ||
1883 | phy_addr = virt_to_phys(vc->mpp_buffer); | |
1884 | mpp_addr = phy_addr & PPC_MPPE_ADDRESS_MASK; | |
1885 | ||
1886 | /* We must abort any in-progress save operations to ensure | |
1887 | * the table is valid so that prefetch engine knows when to | |
1888 | * stop prefetching. */ | |
1889 | logmpp(mpp_addr | PPC_LOGMPP_LOG_ABORT); | |
1890 | mtspr(SPRN_MPPR, mpp_addr | PPC_MPPR_FETCH_WHOLE_TABLE); | |
1891 | } | |
1892 | ||
d911f0be PM |
1893 | static void prepare_threads(struct kvmppc_vcore *vc) |
1894 | { | |
1895 | struct kvm_vcpu *vcpu, *vnext; | |
1896 | ||
1897 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, | |
1898 | arch.run_list) { | |
1899 | if (signal_pending(vcpu->arch.run_task)) | |
1900 | vcpu->arch.ret = -EINTR; | |
1901 | else if (vcpu->arch.vpa.update_pending || | |
1902 | vcpu->arch.slb_shadow.update_pending || | |
1903 | vcpu->arch.dtl.update_pending) | |
1904 | vcpu->arch.ret = RESUME_GUEST; | |
1905 | else | |
1906 | continue; | |
1907 | kvmppc_remove_runnable(vc, vcpu); | |
1908 | wake_up(&vcpu->arch.cpu_run); | |
1909 | } | |
1910 | } | |
1911 | ||
25fedfca PM |
1912 | static void post_guest_process(struct kvmppc_vcore *vc) |
1913 | { | |
1914 | u64 now; | |
1915 | long ret; | |
1916 | struct kvm_vcpu *vcpu, *vnext; | |
1917 | ||
1918 | now = get_tb(); | |
1919 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, | |
1920 | arch.run_list) { | |
1921 | /* cancel pending dec exception if dec is positive */ | |
1922 | if (now < vcpu->arch.dec_expires && | |
1923 | kvmppc_core_pending_dec(vcpu)) | |
1924 | kvmppc_core_dequeue_dec(vcpu); | |
1925 | ||
1926 | trace_kvm_guest_exit(vcpu); | |
1927 | ||
1928 | ret = RESUME_GUEST; | |
1929 | if (vcpu->arch.trap) | |
1930 | ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu, | |
1931 | vcpu->arch.run_task); | |
1932 | ||
1933 | vcpu->arch.ret = ret; | |
1934 | vcpu->arch.trap = 0; | |
1935 | ||
1936 | if (vcpu->arch.ceded) { | |
1937 | if (!is_kvmppc_resume_guest(ret)) | |
1938 | kvmppc_end_cede(vcpu); | |
1939 | else | |
1940 | kvmppc_set_timer(vcpu); | |
1941 | } | |
1942 | if (!is_kvmppc_resume_guest(vcpu->arch.ret)) { | |
1943 | kvmppc_remove_runnable(vc, vcpu); | |
1944 | wake_up(&vcpu->arch.cpu_run); | |
1945 | } | |
1946 | } | |
1947 | } | |
1948 | ||
371fefd6 PM |
1949 | /* |
1950 | * Run a set of guest threads on a physical core. | |
1951 | * Called with vc->lock held. | |
1952 | */ | |
66feed61 | 1953 | static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) |
371fefd6 | 1954 | { |
17d48901 | 1955 | struct kvm_vcpu *vcpu, *vnext; |
d911f0be | 1956 | int i; |
2c9097e4 | 1957 | int srcu_idx; |
371fefd6 | 1958 | |
d911f0be PM |
1959 | /* |
1960 | * Remove from the list any threads that have a signal pending | |
1961 | * or need a VPA update done | |
1962 | */ | |
1963 | prepare_threads(vc); | |
1964 | ||
1965 | /* if the runner is no longer runnable, let the caller pick a new one */ | |
1966 | if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE) | |
1967 | return; | |
081f323b PM |
1968 | |
1969 | /* | |
d911f0be | 1970 | * Initialize *vc. |
081f323b | 1971 | */ |
7d6c40da | 1972 | vc->entry_exit_map = 0; |
2711e248 | 1973 | vc->preempt_tb = TB_NIL; |
081f323b PM |
1974 | vc->in_guest = 0; |
1975 | vc->napping_threads = 0; | |
90fd09f8 | 1976 | vc->conferring_threads = 0; |
081f323b | 1977 | |
7b444c67 | 1978 | /* |
3102f784 ME |
1979 | * Make sure we are running on primary threads, and that secondary |
1980 | * threads are offline. Also check if the number of threads in this | |
1981 | * guest are greater than the current system threads per guest. | |
7b444c67 | 1982 | */ |
3102f784 ME |
1983 | if ((threads_per_core > 1) && |
1984 | ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) { | |
17d48901 PM |
1985 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, |
1986 | arch.run_list) { | |
7b444c67 | 1987 | vcpu->arch.ret = -EBUSY; |
25fedfca PM |
1988 | kvmppc_remove_runnable(vc, vcpu); |
1989 | wake_up(&vcpu->arch.cpu_run); | |
1990 | } | |
7b444c67 PM |
1991 | goto out; |
1992 | } | |
1993 | ||
3102f784 | 1994 | |
371fefd6 | 1995 | vc->pcpu = smp_processor_id(); |
2e25aa5f | 1996 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { |
371fefd6 | 1997 | kvmppc_start_thread(vcpu); |
0456ec4f | 1998 | kvmppc_create_dtl_entry(vcpu, vc); |
3c78f78a | 1999 | trace_kvm_guest_enter(vcpu); |
2e25aa5f | 2000 | } |
371fefd6 | 2001 | |
e0b7ec05 PM |
2002 | /* Set this explicitly in case thread 0 doesn't have a vcpu */ |
2003 | get_paca()->kvm_hstate.kvm_vcore = vc; | |
2004 | get_paca()->kvm_hstate.ptid = 0; | |
2005 | ||
2f12f034 | 2006 | vc->vcore_state = VCORE_RUNNING; |
19ccb76a | 2007 | preempt_disable(); |
3c78f78a SW |
2008 | |
2009 | trace_kvmppc_run_core(vc, 0); | |
2010 | ||
371fefd6 | 2011 | spin_unlock(&vc->lock); |
de56a948 | 2012 | |
371fefd6 | 2013 | kvm_guest_enter(); |
2c9097e4 | 2014 | |
e0b7ec05 | 2015 | srcu_idx = srcu_read_lock(&vc->kvm->srcu); |
2c9097e4 | 2016 | |
9678cdaa SS |
2017 | if (vc->mpp_buffer_is_valid) |
2018 | kvmppc_start_restoring_l2_cache(vc); | |
2019 | ||
e0b7ec05 | 2020 | __kvmppc_vcore_entry(); |
de56a948 | 2021 | |
371fefd6 | 2022 | spin_lock(&vc->lock); |
9678cdaa SS |
2023 | |
2024 | if (vc->mpp_buffer) | |
2025 | kvmppc_start_saving_l2_cache(vc); | |
2026 | ||
19ccb76a PM |
2027 | /* disable sending of IPIs on virtual external irqs */ |
2028 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) | |
2029 | vcpu->cpu = -1; | |
2030 | /* wait for secondary threads to finish writing their state to memory */ | |
5d5b99cd | 2031 | kvmppc_wait_for_nap(); |
3102f784 | 2032 | for (i = 0; i < threads_per_subcore; ++i) |
2f12f034 | 2033 | kvmppc_release_hwthread(vc->pcpu + i); |
371fefd6 | 2034 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
19ccb76a | 2035 | vc->vcore_state = VCORE_EXITING; |
371fefd6 PM |
2036 | spin_unlock(&vc->lock); |
2037 | ||
e0b7ec05 | 2038 | srcu_read_unlock(&vc->kvm->srcu, srcu_idx); |
2c9097e4 | 2039 | |
371fefd6 PM |
2040 | /* make sure updates to secondary vcpu structs are visible now */ |
2041 | smp_mb(); | |
de56a948 PM |
2042 | kvm_guest_exit(); |
2043 | ||
2044 | preempt_enable(); | |
de56a948 | 2045 | |
913d3ff9 | 2046 | spin_lock(&vc->lock); |
25fedfca | 2047 | post_guest_process(vc); |
de56a948 PM |
2048 | |
2049 | out: | |
19ccb76a | 2050 | vc->vcore_state = VCORE_INACTIVE; |
3c78f78a | 2051 | trace_kvmppc_run_core(vc, 1); |
371fefd6 PM |
2052 | } |
2053 | ||
19ccb76a PM |
2054 | /* |
2055 | * Wait for some other vcpu thread to execute us, and | |
2056 | * wake us up when we need to handle something in the host. | |
2057 | */ | |
2058 | static void kvmppc_wait_for_exec(struct kvm_vcpu *vcpu, int wait_state) | |
371fefd6 | 2059 | { |
371fefd6 PM |
2060 | DEFINE_WAIT(wait); |
2061 | ||
19ccb76a PM |
2062 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
2063 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) | |
2064 | schedule(); | |
2065 | finish_wait(&vcpu->arch.cpu_run, &wait); | |
2066 | } | |
2067 | ||
2068 | /* | |
2069 | * All the vcpus in this vcore are idle, so wait for a decrementer | |
2070 | * or external interrupt to one of the vcpus. vc->lock is held. | |
2071 | */ | |
2072 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) | |
2073 | { | |
1bc5d59c SW |
2074 | struct kvm_vcpu *vcpu; |
2075 | int do_sleep = 1; | |
2076 | ||
19ccb76a | 2077 | DEFINE_WAIT(wait); |
19ccb76a PM |
2078 | |
2079 | prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); | |
1bc5d59c SW |
2080 | |
2081 | /* | |
2082 | * Check one last time for pending exceptions and ceded state after | |
2083 | * we put ourselves on the wait queue | |
2084 | */ | |
2085 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { | |
2086 | if (vcpu->arch.pending_exceptions || !vcpu->arch.ceded) { | |
2087 | do_sleep = 0; | |
2088 | break; | |
2089 | } | |
2090 | } | |
2091 | ||
2092 | if (!do_sleep) { | |
2093 | finish_wait(&vc->wq, &wait); | |
2094 | return; | |
2095 | } | |
2096 | ||
19ccb76a | 2097 | vc->vcore_state = VCORE_SLEEPING; |
3c78f78a | 2098 | trace_kvmppc_vcore_blocked(vc, 0); |
19ccb76a | 2099 | spin_unlock(&vc->lock); |
913d3ff9 | 2100 | schedule(); |
19ccb76a PM |
2101 | finish_wait(&vc->wq, &wait); |
2102 | spin_lock(&vc->lock); | |
2103 | vc->vcore_state = VCORE_INACTIVE; | |
3c78f78a | 2104 | trace_kvmppc_vcore_blocked(vc, 1); |
19ccb76a | 2105 | } |
371fefd6 | 2106 | |
19ccb76a PM |
2107 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
2108 | { | |
2109 | int n_ceded; | |
19ccb76a PM |
2110 | struct kvmppc_vcore *vc; |
2111 | struct kvm_vcpu *v, *vn; | |
9e368f29 | 2112 | |
3c78f78a SW |
2113 | trace_kvmppc_run_vcpu_enter(vcpu); |
2114 | ||
371fefd6 PM |
2115 | kvm_run->exit_reason = 0; |
2116 | vcpu->arch.ret = RESUME_GUEST; | |
2117 | vcpu->arch.trap = 0; | |
2f12f034 | 2118 | kvmppc_update_vpas(vcpu); |
371fefd6 | 2119 | |
371fefd6 PM |
2120 | /* |
2121 | * Synchronize with other threads in this virtual core | |
2122 | */ | |
2123 | vc = vcpu->arch.vcore; | |
2124 | spin_lock(&vc->lock); | |
19ccb76a | 2125 | vcpu->arch.ceded = 0; |
371fefd6 PM |
2126 | vcpu->arch.run_task = current; |
2127 | vcpu->arch.kvm_run = kvm_run; | |
c7b67670 | 2128 | vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); |
19ccb76a | 2129 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
c7b67670 | 2130 | vcpu->arch.busy_preempt = TB_NIL; |
371fefd6 PM |
2131 | list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads); |
2132 | ++vc->n_runnable; | |
2133 | ||
19ccb76a PM |
2134 | /* |
2135 | * This happens the first time this is called for a vcpu. | |
2136 | * If the vcore is already running, we may be able to start | |
2137 | * this thread straight away and have it join in. | |
2138 | */ | |
8455d79e | 2139 | if (!signal_pending(current)) { |
7d6c40da | 2140 | if (vc->vcore_state == VCORE_RUNNING && !VCORE_IS_EXITING(vc)) { |
2f12f034 | 2141 | kvmppc_create_dtl_entry(vcpu, vc); |
19ccb76a | 2142 | kvmppc_start_thread(vcpu); |
3c78f78a | 2143 | trace_kvm_guest_enter(vcpu); |
8455d79e PM |
2144 | } else if (vc->vcore_state == VCORE_SLEEPING) { |
2145 | wake_up(&vc->wq); | |
371fefd6 PM |
2146 | } |
2147 | ||
8455d79e | 2148 | } |
371fefd6 | 2149 | |
19ccb76a PM |
2150 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2151 | !signal_pending(current)) { | |
8455d79e | 2152 | if (vc->vcore_state != VCORE_INACTIVE) { |
19ccb76a PM |
2153 | spin_unlock(&vc->lock); |
2154 | kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE); | |
2155 | spin_lock(&vc->lock); | |
2156 | continue; | |
2157 | } | |
19ccb76a PM |
2158 | list_for_each_entry_safe(v, vn, &vc->runnable_threads, |
2159 | arch.run_list) { | |
7e28e60e | 2160 | kvmppc_core_prepare_to_enter(v); |
19ccb76a PM |
2161 | if (signal_pending(v->arch.run_task)) { |
2162 | kvmppc_remove_runnable(vc, v); | |
2163 | v->stat.signal_exits++; | |
2164 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; | |
2165 | v->arch.ret = -EINTR; | |
2166 | wake_up(&v->arch.cpu_run); | |
2167 | } | |
2168 | } | |
8455d79e PM |
2169 | if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
2170 | break; | |
8455d79e | 2171 | n_ceded = 0; |
4619ac88 | 2172 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) { |
8455d79e PM |
2173 | if (!v->arch.pending_exceptions) |
2174 | n_ceded += v->arch.ceded; | |
4619ac88 PM |
2175 | else |
2176 | v->arch.ceded = 0; | |
2177 | } | |
25fedfca PM |
2178 | vc->runner = vcpu; |
2179 | if (n_ceded == vc->n_runnable) { | |
8455d79e | 2180 | kvmppc_vcore_blocked(vc); |
c56dadf3 | 2181 | } else if (need_resched()) { |
25fedfca PM |
2182 | vc->vcore_state = VCORE_PREEMPT; |
2183 | /* Let something else run */ | |
2184 | cond_resched_lock(&vc->lock); | |
2185 | vc->vcore_state = VCORE_INACTIVE; | |
2186 | } else { | |
8455d79e | 2187 | kvmppc_run_core(vc); |
25fedfca | 2188 | } |
0456ec4f | 2189 | vc->runner = NULL; |
19ccb76a | 2190 | } |
371fefd6 | 2191 | |
8455d79e PM |
2192 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2193 | (vc->vcore_state == VCORE_RUNNING || | |
2194 | vc->vcore_state == VCORE_EXITING)) { | |
2195 | spin_unlock(&vc->lock); | |
2196 | kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE); | |
2197 | spin_lock(&vc->lock); | |
2198 | } | |
2199 | ||
2200 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { | |
2201 | kvmppc_remove_runnable(vc, vcpu); | |
2202 | vcpu->stat.signal_exits++; | |
2203 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
2204 | vcpu->arch.ret = -EINTR; | |
2205 | } | |
2206 | ||
2207 | if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { | |
2208 | /* Wake up some vcpu to run the core */ | |
2209 | v = list_first_entry(&vc->runnable_threads, | |
2210 | struct kvm_vcpu, arch.run_list); | |
2211 | wake_up(&v->arch.cpu_run); | |
371fefd6 PM |
2212 | } |
2213 | ||
3c78f78a | 2214 | trace_kvmppc_run_vcpu_exit(vcpu, kvm_run); |
371fefd6 | 2215 | spin_unlock(&vc->lock); |
371fefd6 | 2216 | return vcpu->arch.ret; |
de56a948 PM |
2217 | } |
2218 | ||
3a167bea | 2219 | static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu) |
a8606e20 PM |
2220 | { |
2221 | int r; | |
913d3ff9 | 2222 | int srcu_idx; |
a8606e20 | 2223 | |
af8f38b3 AG |
2224 | if (!vcpu->arch.sane) { |
2225 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
2226 | return -EINVAL; | |
2227 | } | |
2228 | ||
25051b5a SW |
2229 | kvmppc_core_prepare_to_enter(vcpu); |
2230 | ||
19ccb76a PM |
2231 | /* No need to go into the guest when all we'll do is come back out */ |
2232 | if (signal_pending(current)) { | |
2233 | run->exit_reason = KVM_EXIT_INTR; | |
2234 | return -EINTR; | |
2235 | } | |
2236 | ||
32fad281 | 2237 | atomic_inc(&vcpu->kvm->arch.vcpus_running); |
31037eca | 2238 | /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */ |
32fad281 PM |
2239 | smp_mb(); |
2240 | ||
c17b98cf | 2241 | /* On the first time here, set up HTAB and VRMA */ |
31037eca | 2242 | if (!vcpu->kvm->arch.hpte_setup_done) { |
32fad281 | 2243 | r = kvmppc_hv_setup_htab_rma(vcpu); |
c77162de | 2244 | if (r) |
32fad281 | 2245 | goto out; |
c77162de | 2246 | } |
19ccb76a PM |
2247 | |
2248 | flush_fp_to_thread(current); | |
2249 | flush_altivec_to_thread(current); | |
2250 | flush_vsx_to_thread(current); | |
2251 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; | |
342d3db7 | 2252 | vcpu->arch.pgdir = current->mm->pgd; |
c7b67670 | 2253 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
19ccb76a | 2254 | |
a8606e20 PM |
2255 | do { |
2256 | r = kvmppc_run_vcpu(run, vcpu); | |
2257 | ||
2258 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && | |
2259 | !(vcpu->arch.shregs.msr & MSR_PR)) { | |
3c78f78a | 2260 | trace_kvm_hcall_enter(vcpu); |
a8606e20 | 2261 | r = kvmppc_pseries_do_hcall(vcpu); |
3c78f78a | 2262 | trace_kvm_hcall_exit(vcpu, r); |
7e28e60e | 2263 | kvmppc_core_prepare_to_enter(vcpu); |
913d3ff9 PM |
2264 | } else if (r == RESUME_PAGE_FAULT) { |
2265 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2266 | r = kvmppc_book3s_hv_page_fault(run, vcpu, | |
2267 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
2268 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
a8606e20 | 2269 | } |
e59d24e6 | 2270 | } while (is_kvmppc_resume_guest(r)); |
32fad281 PM |
2271 | |
2272 | out: | |
c7b67670 | 2273 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
32fad281 | 2274 | atomic_dec(&vcpu->kvm->arch.vcpus_running); |
a8606e20 PM |
2275 | return r; |
2276 | } | |
2277 | ||
5b74716e BH |
2278 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
2279 | int linux_psize) | |
2280 | { | |
2281 | struct mmu_psize_def *def = &mmu_psize_defs[linux_psize]; | |
2282 | ||
2283 | if (!def->shift) | |
2284 | return; | |
2285 | (*sps)->page_shift = def->shift; | |
2286 | (*sps)->slb_enc = def->sllp; | |
2287 | (*sps)->enc[0].page_shift = def->shift; | |
b1022fbd | 2288 | (*sps)->enc[0].pte_enc = def->penc[linux_psize]; |
1f365bb0 AK |
2289 | /* |
2290 | * Add 16MB MPSS support if host supports it | |
2291 | */ | |
2292 | if (linux_psize != MMU_PAGE_16M && def->penc[MMU_PAGE_16M] != -1) { | |
2293 | (*sps)->enc[1].page_shift = 24; | |
2294 | (*sps)->enc[1].pte_enc = def->penc[MMU_PAGE_16M]; | |
2295 | } | |
5b74716e BH |
2296 | (*sps)++; |
2297 | } | |
2298 | ||
3a167bea AK |
2299 | static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm, |
2300 | struct kvm_ppc_smmu_info *info) | |
5b74716e BH |
2301 | { |
2302 | struct kvm_ppc_one_seg_page_size *sps; | |
2303 | ||
2304 | info->flags = KVM_PPC_PAGE_SIZES_REAL; | |
2305 | if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) | |
2306 | info->flags |= KVM_PPC_1T_SEGMENTS; | |
2307 | info->slb_size = mmu_slb_size; | |
2308 | ||
2309 | /* We only support these sizes for now, and no muti-size segments */ | |
2310 | sps = &info->sps[0]; | |
2311 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K); | |
2312 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K); | |
2313 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M); | |
2314 | ||
2315 | return 0; | |
2316 | } | |
2317 | ||
82ed3616 PM |
2318 | /* |
2319 | * Get (and clear) the dirty memory log for a memory slot. | |
2320 | */ | |
3a167bea AK |
2321 | static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm, |
2322 | struct kvm_dirty_log *log) | |
82ed3616 | 2323 | { |
9f6b8029 | 2324 | struct kvm_memslots *slots; |
82ed3616 PM |
2325 | struct kvm_memory_slot *memslot; |
2326 | int r; | |
2327 | unsigned long n; | |
2328 | ||
2329 | mutex_lock(&kvm->slots_lock); | |
2330 | ||
2331 | r = -EINVAL; | |
bbacc0c1 | 2332 | if (log->slot >= KVM_USER_MEM_SLOTS) |
82ed3616 PM |
2333 | goto out; |
2334 | ||
9f6b8029 PB |
2335 | slots = kvm_memslots(kvm); |
2336 | memslot = id_to_memslot(slots, log->slot); | |
82ed3616 PM |
2337 | r = -ENOENT; |
2338 | if (!memslot->dirty_bitmap) | |
2339 | goto out; | |
2340 | ||
2341 | n = kvm_dirty_bitmap_bytes(memslot); | |
2342 | memset(memslot->dirty_bitmap, 0, n); | |
2343 | ||
dfe49dbd | 2344 | r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap); |
82ed3616 PM |
2345 | if (r) |
2346 | goto out; | |
2347 | ||
2348 | r = -EFAULT; | |
2349 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
2350 | goto out; | |
2351 | ||
2352 | r = 0; | |
2353 | out: | |
2354 | mutex_unlock(&kvm->slots_lock); | |
2355 | return r; | |
2356 | } | |
2357 | ||
3a167bea AK |
2358 | static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free, |
2359 | struct kvm_memory_slot *dont) | |
a66b48c3 PM |
2360 | { |
2361 | if (!dont || free->arch.rmap != dont->arch.rmap) { | |
2362 | vfree(free->arch.rmap); | |
2363 | free->arch.rmap = NULL; | |
b2b2f165 | 2364 | } |
a66b48c3 PM |
2365 | } |
2366 | ||
3a167bea AK |
2367 | static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot, |
2368 | unsigned long npages) | |
a66b48c3 PM |
2369 | { |
2370 | slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); | |
2371 | if (!slot->arch.rmap) | |
2372 | return -ENOMEM; | |
aa04b4cc | 2373 | |
c77162de PM |
2374 | return 0; |
2375 | } | |
aa04b4cc | 2376 | |
3a167bea AK |
2377 | static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, |
2378 | struct kvm_memory_slot *memslot, | |
09170a49 | 2379 | const struct kvm_userspace_memory_region *mem) |
c77162de | 2380 | { |
a66b48c3 | 2381 | return 0; |
c77162de PM |
2382 | } |
2383 | ||
3a167bea | 2384 | static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, |
09170a49 | 2385 | const struct kvm_userspace_memory_region *mem, |
f36f3f28 PB |
2386 | const struct kvm_memory_slot *old, |
2387 | const struct kvm_memory_slot *new) | |
c77162de | 2388 | { |
dfe49dbd | 2389 | unsigned long npages = mem->memory_size >> PAGE_SHIFT; |
9f6b8029 | 2390 | struct kvm_memslots *slots; |
dfe49dbd PM |
2391 | struct kvm_memory_slot *memslot; |
2392 | ||
8482644a | 2393 | if (npages && old->npages) { |
dfe49dbd PM |
2394 | /* |
2395 | * If modifying a memslot, reset all the rmap dirty bits. | |
2396 | * If this is a new memslot, we don't need to do anything | |
2397 | * since the rmap array starts out as all zeroes, | |
2398 | * i.e. no pages are dirty. | |
2399 | */ | |
9f6b8029 PB |
2400 | slots = kvm_memslots(kvm); |
2401 | memslot = id_to_memslot(slots, mem->slot); | |
dfe49dbd PM |
2402 | kvmppc_hv_get_dirty_log(kvm, memslot, NULL); |
2403 | } | |
c77162de PM |
2404 | } |
2405 | ||
a0144e2a PM |
2406 | /* |
2407 | * Update LPCR values in kvm->arch and in vcores. | |
2408 | * Caller must hold kvm->lock. | |
2409 | */ | |
2410 | void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask) | |
2411 | { | |
2412 | long int i; | |
2413 | u32 cores_done = 0; | |
2414 | ||
2415 | if ((kvm->arch.lpcr & mask) == lpcr) | |
2416 | return; | |
2417 | ||
2418 | kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr; | |
2419 | ||
2420 | for (i = 0; i < KVM_MAX_VCORES; ++i) { | |
2421 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; | |
2422 | if (!vc) | |
2423 | continue; | |
2424 | spin_lock(&vc->lock); | |
2425 | vc->lpcr = (vc->lpcr & ~mask) | lpcr; | |
2426 | spin_unlock(&vc->lock); | |
2427 | if (++cores_done >= kvm->arch.online_vcores) | |
2428 | break; | |
2429 | } | |
2430 | } | |
2431 | ||
3a167bea AK |
2432 | static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu) |
2433 | { | |
2434 | return; | |
2435 | } | |
2436 | ||
32fad281 | 2437 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
c77162de PM |
2438 | { |
2439 | int err = 0; | |
2440 | struct kvm *kvm = vcpu->kvm; | |
c77162de PM |
2441 | unsigned long hva; |
2442 | struct kvm_memory_slot *memslot; | |
2443 | struct vm_area_struct *vma; | |
a0144e2a | 2444 | unsigned long lpcr = 0, senc; |
c77162de | 2445 | unsigned long psize, porder; |
2c9097e4 | 2446 | int srcu_idx; |
c77162de PM |
2447 | |
2448 | mutex_lock(&kvm->lock); | |
31037eca | 2449 | if (kvm->arch.hpte_setup_done) |
c77162de | 2450 | goto out; /* another vcpu beat us to it */ |
aa04b4cc | 2451 | |
32fad281 PM |
2452 | /* Allocate hashed page table (if not done already) and reset it */ |
2453 | if (!kvm->arch.hpt_virt) { | |
2454 | err = kvmppc_alloc_hpt(kvm, NULL); | |
2455 | if (err) { | |
2456 | pr_err("KVM: Couldn't alloc HPT\n"); | |
2457 | goto out; | |
2458 | } | |
2459 | } | |
2460 | ||
c77162de | 2461 | /* Look up the memslot for guest physical address 0 */ |
2c9097e4 | 2462 | srcu_idx = srcu_read_lock(&kvm->srcu); |
c77162de | 2463 | memslot = gfn_to_memslot(kvm, 0); |
aa04b4cc | 2464 | |
c77162de PM |
2465 | /* We must have some memory at 0 by now */ |
2466 | err = -EINVAL; | |
2467 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) | |
2c9097e4 | 2468 | goto out_srcu; |
c77162de PM |
2469 | |
2470 | /* Look up the VMA for the start of this memory slot */ | |
2471 | hva = memslot->userspace_addr; | |
2472 | down_read(¤t->mm->mmap_sem); | |
2473 | vma = find_vma(current->mm, hva); | |
2474 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) | |
2475 | goto up_out; | |
2476 | ||
2477 | psize = vma_kernel_pagesize(vma); | |
da9d1d7f | 2478 | porder = __ilog2(psize); |
c77162de | 2479 | |
c77162de PM |
2480 | up_read(¤t->mm->mmap_sem); |
2481 | ||
c17b98cf PM |
2482 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
2483 | err = -EINVAL; | |
2484 | if (!(psize == 0x1000 || psize == 0x10000 || | |
2485 | psize == 0x1000000)) | |
2486 | goto out_srcu; | |
c77162de | 2487 | |
c17b98cf PM |
2488 | /* Update VRMASD field in the LPCR */ |
2489 | senc = slb_pgsize_encoding(psize); | |
2490 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | | |
2491 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
2492 | /* the -4 is to account for senc values starting at 0x10 */ | |
2493 | lpcr = senc << (LPCR_VRMASD_SH - 4); | |
c77162de | 2494 | |
c17b98cf PM |
2495 | /* Create HPTEs in the hash page table for the VRMA */ |
2496 | kvmppc_map_vrma(vcpu, memslot, porder); | |
aa04b4cc | 2497 | |
c17b98cf | 2498 | kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD); |
a0144e2a | 2499 | |
31037eca | 2500 | /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */ |
c77162de | 2501 | smp_wmb(); |
31037eca | 2502 | kvm->arch.hpte_setup_done = 1; |
c77162de | 2503 | err = 0; |
2c9097e4 PM |
2504 | out_srcu: |
2505 | srcu_read_unlock(&kvm->srcu, srcu_idx); | |
c77162de PM |
2506 | out: |
2507 | mutex_unlock(&kvm->lock); | |
2508 | return err; | |
b2b2f165 | 2509 | |
c77162de PM |
2510 | up_out: |
2511 | up_read(¤t->mm->mmap_sem); | |
505d6421 | 2512 | goto out_srcu; |
de56a948 PM |
2513 | } |
2514 | ||
3a167bea | 2515 | static int kvmppc_core_init_vm_hv(struct kvm *kvm) |
de56a948 | 2516 | { |
32fad281 | 2517 | unsigned long lpcr, lpid; |
e23a808b | 2518 | char buf[32]; |
de56a948 | 2519 | |
32fad281 PM |
2520 | /* Allocate the guest's logical partition ID */ |
2521 | ||
2522 | lpid = kvmppc_alloc_lpid(); | |
5d226ae5 | 2523 | if ((long)lpid < 0) |
32fad281 PM |
2524 | return -ENOMEM; |
2525 | kvm->arch.lpid = lpid; | |
de56a948 | 2526 | |
1b400ba0 PM |
2527 | /* |
2528 | * Since we don't flush the TLB when tearing down a VM, | |
2529 | * and this lpid might have previously been used, | |
2530 | * make sure we flush on each core before running the new VM. | |
2531 | */ | |
2532 | cpumask_setall(&kvm->arch.need_tlb_flush); | |
2533 | ||
699a0ea0 PM |
2534 | /* Start out with the default set of hcalls enabled */ |
2535 | memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls, | |
2536 | sizeof(kvm->arch.enabled_hcalls)); | |
2537 | ||
9e368f29 | 2538 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
aa04b4cc | 2539 | |
c17b98cf PM |
2540 | /* Init LPCR for virtual RMA mode */ |
2541 | kvm->arch.host_lpid = mfspr(SPRN_LPID); | |
2542 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); | |
2543 | lpcr &= LPCR_PECE | LPCR_LPES; | |
2544 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | | |
2545 | LPCR_VPM0 | LPCR_VPM1; | |
2546 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | | |
2547 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
2548 | /* On POWER8 turn on online bit to enable PURR/SPURR */ | |
2549 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
2550 | lpcr |= LPCR_ONL; | |
9e368f29 | 2551 | kvm->arch.lpcr = lpcr; |
aa04b4cc | 2552 | |
512691d4 | 2553 | /* |
441c19c8 ME |
2554 | * Track that we now have a HV mode VM active. This blocks secondary |
2555 | * CPU threads from coming online. | |
512691d4 | 2556 | */ |
441c19c8 | 2557 | kvm_hv_vm_activated(); |
512691d4 | 2558 | |
e23a808b PM |
2559 | /* |
2560 | * Create a debugfs directory for the VM | |
2561 | */ | |
2562 | snprintf(buf, sizeof(buf), "vm%d", current->pid); | |
2563 | kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir); | |
2564 | if (!IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
2565 | kvmppc_mmu_debugfs_init(kvm); | |
2566 | ||
54738c09 | 2567 | return 0; |
de56a948 PM |
2568 | } |
2569 | ||
f1378b1c PM |
2570 | static void kvmppc_free_vcores(struct kvm *kvm) |
2571 | { | |
2572 | long int i; | |
2573 | ||
9678cdaa SS |
2574 | for (i = 0; i < KVM_MAX_VCORES; ++i) { |
2575 | if (kvm->arch.vcores[i] && kvm->arch.vcores[i]->mpp_buffer) { | |
2576 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; | |
2577 | free_pages((unsigned long)vc->mpp_buffer, | |
2578 | MPP_BUFFER_ORDER); | |
2579 | } | |
f1378b1c | 2580 | kfree(kvm->arch.vcores[i]); |
9678cdaa | 2581 | } |
f1378b1c PM |
2582 | kvm->arch.online_vcores = 0; |
2583 | } | |
2584 | ||
3a167bea | 2585 | static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) |
de56a948 | 2586 | { |
e23a808b PM |
2587 | debugfs_remove_recursive(kvm->arch.debugfs_dir); |
2588 | ||
441c19c8 | 2589 | kvm_hv_vm_deactivated(); |
512691d4 | 2590 | |
f1378b1c | 2591 | kvmppc_free_vcores(kvm); |
aa04b4cc | 2592 | |
de56a948 PM |
2593 | kvmppc_free_hpt(kvm); |
2594 | } | |
2595 | ||
3a167bea AK |
2596 | /* We don't need to emulate any privileged instructions or dcbz */ |
2597 | static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
2598 | unsigned int inst, int *advance) | |
de56a948 | 2599 | { |
3a167bea | 2600 | return EMULATE_FAIL; |
de56a948 PM |
2601 | } |
2602 | ||
3a167bea AK |
2603 | static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn, |
2604 | ulong spr_val) | |
de56a948 PM |
2605 | { |
2606 | return EMULATE_FAIL; | |
2607 | } | |
2608 | ||
3a167bea AK |
2609 | static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn, |
2610 | ulong *spr_val) | |
de56a948 PM |
2611 | { |
2612 | return EMULATE_FAIL; | |
2613 | } | |
2614 | ||
3a167bea | 2615 | static int kvmppc_core_check_processor_compat_hv(void) |
de56a948 | 2616 | { |
c17b98cf PM |
2617 | if (!cpu_has_feature(CPU_FTR_HVMODE) || |
2618 | !cpu_has_feature(CPU_FTR_ARCH_206)) | |
3a167bea AK |
2619 | return -EIO; |
2620 | return 0; | |
de56a948 PM |
2621 | } |
2622 | ||
3a167bea AK |
2623 | static long kvm_arch_vm_ioctl_hv(struct file *filp, |
2624 | unsigned int ioctl, unsigned long arg) | |
2625 | { | |
2626 | struct kvm *kvm __maybe_unused = filp->private_data; | |
2627 | void __user *argp = (void __user *)arg; | |
2628 | long r; | |
2629 | ||
2630 | switch (ioctl) { | |
2631 | ||
3a167bea AK |
2632 | case KVM_PPC_ALLOCATE_HTAB: { |
2633 | u32 htab_order; | |
2634 | ||
2635 | r = -EFAULT; | |
2636 | if (get_user(htab_order, (u32 __user *)argp)) | |
2637 | break; | |
2638 | r = kvmppc_alloc_reset_hpt(kvm, &htab_order); | |
2639 | if (r) | |
2640 | break; | |
2641 | r = -EFAULT; | |
2642 | if (put_user(htab_order, (u32 __user *)argp)) | |
2643 | break; | |
2644 | r = 0; | |
2645 | break; | |
2646 | } | |
2647 | ||
2648 | case KVM_PPC_GET_HTAB_FD: { | |
2649 | struct kvm_get_htab_fd ghf; | |
2650 | ||
2651 | r = -EFAULT; | |
2652 | if (copy_from_user(&ghf, argp, sizeof(ghf))) | |
2653 | break; | |
2654 | r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); | |
2655 | break; | |
2656 | } | |
2657 | ||
2658 | default: | |
2659 | r = -ENOTTY; | |
2660 | } | |
2661 | ||
2662 | return r; | |
2663 | } | |
2664 | ||
699a0ea0 PM |
2665 | /* |
2666 | * List of hcall numbers to enable by default. | |
2667 | * For compatibility with old userspace, we enable by default | |
2668 | * all hcalls that were implemented before the hcall-enabling | |
2669 | * facility was added. Note this list should not include H_RTAS. | |
2670 | */ | |
2671 | static unsigned int default_hcall_list[] = { | |
2672 | H_REMOVE, | |
2673 | H_ENTER, | |
2674 | H_READ, | |
2675 | H_PROTECT, | |
2676 | H_BULK_REMOVE, | |
2677 | H_GET_TCE, | |
2678 | H_PUT_TCE, | |
2679 | H_SET_DABR, | |
2680 | H_SET_XDABR, | |
2681 | H_CEDE, | |
2682 | H_PROD, | |
2683 | H_CONFER, | |
2684 | H_REGISTER_VPA, | |
2685 | #ifdef CONFIG_KVM_XICS | |
2686 | H_EOI, | |
2687 | H_CPPR, | |
2688 | H_IPI, | |
2689 | H_IPOLL, | |
2690 | H_XIRR, | |
2691 | H_XIRR_X, | |
2692 | #endif | |
2693 | 0 | |
2694 | }; | |
2695 | ||
2696 | static void init_default_hcalls(void) | |
2697 | { | |
2698 | int i; | |
ae2113a4 | 2699 | unsigned int hcall; |
699a0ea0 | 2700 | |
ae2113a4 PM |
2701 | for (i = 0; default_hcall_list[i]; ++i) { |
2702 | hcall = default_hcall_list[i]; | |
2703 | WARN_ON(!kvmppc_hcall_impl_hv(hcall)); | |
2704 | __set_bit(hcall / 4, default_enabled_hcalls); | |
2705 | } | |
699a0ea0 PM |
2706 | } |
2707 | ||
cbbc58d4 | 2708 | static struct kvmppc_ops kvm_ops_hv = { |
3a167bea AK |
2709 | .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, |
2710 | .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, | |
2711 | .get_one_reg = kvmppc_get_one_reg_hv, | |
2712 | .set_one_reg = kvmppc_set_one_reg_hv, | |
2713 | .vcpu_load = kvmppc_core_vcpu_load_hv, | |
2714 | .vcpu_put = kvmppc_core_vcpu_put_hv, | |
2715 | .set_msr = kvmppc_set_msr_hv, | |
2716 | .vcpu_run = kvmppc_vcpu_run_hv, | |
2717 | .vcpu_create = kvmppc_core_vcpu_create_hv, | |
2718 | .vcpu_free = kvmppc_core_vcpu_free_hv, | |
2719 | .check_requests = kvmppc_core_check_requests_hv, | |
2720 | .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv, | |
2721 | .flush_memslot = kvmppc_core_flush_memslot_hv, | |
2722 | .prepare_memory_region = kvmppc_core_prepare_memory_region_hv, | |
2723 | .commit_memory_region = kvmppc_core_commit_memory_region_hv, | |
2724 | .unmap_hva = kvm_unmap_hva_hv, | |
2725 | .unmap_hva_range = kvm_unmap_hva_range_hv, | |
2726 | .age_hva = kvm_age_hva_hv, | |
2727 | .test_age_hva = kvm_test_age_hva_hv, | |
2728 | .set_spte_hva = kvm_set_spte_hva_hv, | |
2729 | .mmu_destroy = kvmppc_mmu_destroy_hv, | |
2730 | .free_memslot = kvmppc_core_free_memslot_hv, | |
2731 | .create_memslot = kvmppc_core_create_memslot_hv, | |
2732 | .init_vm = kvmppc_core_init_vm_hv, | |
2733 | .destroy_vm = kvmppc_core_destroy_vm_hv, | |
3a167bea AK |
2734 | .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv, |
2735 | .emulate_op = kvmppc_core_emulate_op_hv, | |
2736 | .emulate_mtspr = kvmppc_core_emulate_mtspr_hv, | |
2737 | .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, | |
2738 | .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, | |
2739 | .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, | |
ae2113a4 | 2740 | .hcall_implemented = kvmppc_hcall_impl_hv, |
3a167bea AK |
2741 | }; |
2742 | ||
2743 | static int kvmppc_book3s_init_hv(void) | |
de56a948 PM |
2744 | { |
2745 | int r; | |
cbbc58d4 AK |
2746 | /* |
2747 | * FIXME!! Do we need to check on all cpus ? | |
2748 | */ | |
2749 | r = kvmppc_core_check_processor_compat_hv(); | |
2750 | if (r < 0) | |
739e2425 | 2751 | return -ENODEV; |
de56a948 | 2752 | |
cbbc58d4 AK |
2753 | kvm_ops_hv.owner = THIS_MODULE; |
2754 | kvmppc_hv_ops = &kvm_ops_hv; | |
de56a948 | 2755 | |
699a0ea0 PM |
2756 | init_default_hcalls(); |
2757 | ||
cbbc58d4 | 2758 | r = kvmppc_mmu_hv_init(); |
de56a948 PM |
2759 | return r; |
2760 | } | |
2761 | ||
3a167bea | 2762 | static void kvmppc_book3s_exit_hv(void) |
de56a948 | 2763 | { |
cbbc58d4 | 2764 | kvmppc_hv_ops = NULL; |
de56a948 PM |
2765 | } |
2766 | ||
3a167bea AK |
2767 | module_init(kvmppc_book3s_init_hv); |
2768 | module_exit(kvmppc_book3s_exit_hv); | |
2ba9f0d8 | 2769 | MODULE_LICENSE("GPL"); |
398a76c6 AG |
2770 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
2771 | MODULE_ALIAS("devname:kvm"); |