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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 | ||
b4deba5c PM |
84 | static int dynamic_mt_modes = 6; |
85 | module_param(dynamic_mt_modes, int, S_IRUGO | S_IWUSR); | |
86 | MODULE_PARM_DESC(dynamic_mt_modes, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)"); | |
ec257165 PM |
87 | static int target_smt_mode; |
88 | module_param(target_smt_mode, int, S_IRUGO | S_IWUSR); | |
89 | MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)"); | |
9678cdaa | 90 | |
19ccb76a | 91 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
32fad281 | 92 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
19ccb76a | 93 | |
66feed61 PM |
94 | static bool kvmppc_ipi_thread(int cpu) |
95 | { | |
96 | /* On POWER8 for IPIs to threads in the same core, use msgsnd */ | |
97 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) { | |
98 | preempt_disable(); | |
99 | if (cpu_first_thread_sibling(cpu) == | |
100 | cpu_first_thread_sibling(smp_processor_id())) { | |
101 | unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER); | |
102 | msg |= cpu_thread_in_core(cpu); | |
103 | smp_mb(); | |
104 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
105 | preempt_enable(); | |
106 | return true; | |
107 | } | |
108 | preempt_enable(); | |
109 | } | |
110 | ||
111 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) | |
112 | if (cpu >= 0 && cpu < nr_cpu_ids && paca[cpu].kvm_hstate.xics_phys) { | |
113 | xics_wake_cpu(cpu); | |
114 | return true; | |
115 | } | |
116 | #endif | |
117 | ||
118 | return false; | |
119 | } | |
120 | ||
3a167bea | 121 | static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) |
54695c30 | 122 | { |
ec257165 | 123 | int cpu; |
54695c30 BH |
124 | wait_queue_head_t *wqp; |
125 | ||
126 | wqp = kvm_arch_vcpu_wq(vcpu); | |
127 | if (waitqueue_active(wqp)) { | |
128 | wake_up_interruptible(wqp); | |
129 | ++vcpu->stat.halt_wakeup; | |
130 | } | |
131 | ||
ec257165 | 132 | if (kvmppc_ipi_thread(vcpu->arch.thread_cpu)) |
66feed61 | 133 | return; |
54695c30 BH |
134 | |
135 | /* CPU points to the first thread of the core */ | |
ec257165 | 136 | cpu = vcpu->cpu; |
66feed61 PM |
137 | if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu)) |
138 | smp_send_reschedule(cpu); | |
54695c30 BH |
139 | } |
140 | ||
c7b67670 PM |
141 | /* |
142 | * We use the vcpu_load/put functions to measure stolen time. | |
143 | * Stolen time is counted as time when either the vcpu is able to | |
144 | * run as part of a virtual core, but the task running the vcore | |
145 | * is preempted or sleeping, or when the vcpu needs something done | |
146 | * in the kernel by the task running the vcpu, but that task is | |
147 | * preempted or sleeping. Those two things have to be counted | |
148 | * separately, since one of the vcpu tasks will take on the job | |
149 | * of running the core, and the other vcpu tasks in the vcore will | |
150 | * sleep waiting for it to do that, but that sleep shouldn't count | |
151 | * as stolen time. | |
152 | * | |
153 | * Hence we accumulate stolen time when the vcpu can run as part of | |
154 | * a vcore using vc->stolen_tb, and the stolen time when the vcpu | |
155 | * needs its task to do other things in the kernel (for example, | |
156 | * service a page fault) in busy_stolen. We don't accumulate | |
157 | * stolen time for a vcore when it is inactive, or for a vcpu | |
158 | * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of | |
159 | * a misnomer; it means that the vcpu task is not executing in | |
160 | * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in | |
161 | * the kernel. We don't have any way of dividing up that time | |
162 | * between time that the vcpu is genuinely stopped, time that | |
163 | * the task is actively working on behalf of the vcpu, and time | |
164 | * that the task is preempted, so we don't count any of it as | |
165 | * stolen. | |
166 | * | |
167 | * Updates to busy_stolen are protected by arch.tbacct_lock; | |
2711e248 PM |
168 | * updates to vc->stolen_tb are protected by the vcore->stoltb_lock |
169 | * lock. The stolen times are measured in units of timebase ticks. | |
170 | * (Note that the != TB_NIL checks below are purely defensive; | |
171 | * they should never fail.) | |
c7b67670 PM |
172 | */ |
173 | ||
ec257165 PM |
174 | static void kvmppc_core_start_stolen(struct kvmppc_vcore *vc) |
175 | { | |
176 | unsigned long flags; | |
177 | ||
178 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
179 | vc->preempt_tb = mftb(); | |
180 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
181 | } | |
182 | ||
183 | static void kvmppc_core_end_stolen(struct kvmppc_vcore *vc) | |
184 | { | |
185 | unsigned long flags; | |
186 | ||
187 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
188 | if (vc->preempt_tb != TB_NIL) { | |
189 | vc->stolen_tb += mftb() - vc->preempt_tb; | |
190 | vc->preempt_tb = TB_NIL; | |
191 | } | |
192 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
193 | } | |
194 | ||
3a167bea | 195 | static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu) |
de56a948 | 196 | { |
0456ec4f | 197 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 198 | unsigned long flags; |
0456ec4f | 199 | |
2711e248 PM |
200 | /* |
201 | * We can test vc->runner without taking the vcore lock, | |
202 | * because only this task ever sets vc->runner to this | |
203 | * vcpu, and once it is set to this vcpu, only this task | |
204 | * ever sets it to NULL. | |
205 | */ | |
ec257165 PM |
206 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
207 | kvmppc_core_end_stolen(vc); | |
208 | ||
2711e248 | 209 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
c7b67670 PM |
210 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && |
211 | vcpu->arch.busy_preempt != TB_NIL) { | |
212 | vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt; | |
213 | vcpu->arch.busy_preempt = TB_NIL; | |
214 | } | |
bf3d32e1 | 215 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
216 | } |
217 | ||
3a167bea | 218 | static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu) |
de56a948 | 219 | { |
0456ec4f | 220 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 221 | unsigned long flags; |
0456ec4f | 222 | |
ec257165 PM |
223 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
224 | kvmppc_core_start_stolen(vc); | |
225 | ||
2711e248 | 226 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
c7b67670 PM |
227 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
228 | vcpu->arch.busy_preempt = mftb(); | |
bf3d32e1 | 229 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
230 | } |
231 | ||
3a167bea | 232 | static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr) |
de56a948 PM |
233 | { |
234 | vcpu->arch.shregs.msr = msr; | |
19ccb76a | 235 | kvmppc_end_cede(vcpu); |
de56a948 PM |
236 | } |
237 | ||
5358a963 | 238 | static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) |
de56a948 PM |
239 | { |
240 | vcpu->arch.pvr = pvr; | |
241 | } | |
242 | ||
5358a963 | 243 | static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) |
388cc6e1 PM |
244 | { |
245 | unsigned long pcr = 0; | |
246 | struct kvmppc_vcore *vc = vcpu->arch.vcore; | |
247 | ||
248 | if (arch_compat) { | |
388cc6e1 PM |
249 | switch (arch_compat) { |
250 | case PVR_ARCH_205: | |
5557ae0e PM |
251 | /* |
252 | * If an arch bit is set in PCR, all the defined | |
253 | * higher-order arch bits also have to be set. | |
254 | */ | |
255 | pcr = PCR_ARCH_206 | PCR_ARCH_205; | |
388cc6e1 PM |
256 | break; |
257 | case PVR_ARCH_206: | |
258 | case PVR_ARCH_206p: | |
5557ae0e PM |
259 | pcr = PCR_ARCH_206; |
260 | break; | |
261 | case PVR_ARCH_207: | |
388cc6e1 PM |
262 | break; |
263 | default: | |
264 | return -EINVAL; | |
265 | } | |
5557ae0e PM |
266 | |
267 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) { | |
268 | /* POWER7 can't emulate POWER8 */ | |
269 | if (!(pcr & PCR_ARCH_206)) | |
270 | return -EINVAL; | |
271 | pcr &= ~PCR_ARCH_206; | |
272 | } | |
388cc6e1 PM |
273 | } |
274 | ||
275 | spin_lock(&vc->lock); | |
276 | vc->arch_compat = arch_compat; | |
277 | vc->pcr = pcr; | |
278 | spin_unlock(&vc->lock); | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
5358a963 | 283 | static void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
de56a948 PM |
284 | { |
285 | int r; | |
286 | ||
287 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); | |
288 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", | |
289 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); | |
290 | for (r = 0; r < 16; ++r) | |
291 | pr_err("r%2d = %.16lx r%d = %.16lx\n", | |
292 | r, kvmppc_get_gpr(vcpu, r), | |
293 | r+16, kvmppc_get_gpr(vcpu, r+16)); | |
294 | pr_err("ctr = %.16lx lr = %.16lx\n", | |
295 | vcpu->arch.ctr, vcpu->arch.lr); | |
296 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", | |
297 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); | |
298 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", | |
299 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); | |
300 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", | |
301 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); | |
302 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", | |
303 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); | |
304 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); | |
305 | pr_err("fault dar = %.16lx dsisr = %.8x\n", | |
306 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
307 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); | |
308 | for (r = 0; r < vcpu->arch.slb_max; ++r) | |
309 | pr_err(" ESID = %.16llx VSID = %.16llx\n", | |
310 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); | |
311 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", | |
a0144e2a | 312 | vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, |
de56a948 PM |
313 | vcpu->arch.last_inst); |
314 | } | |
315 | ||
5358a963 | 316 | static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
a8606e20 PM |
317 | { |
318 | int r; | |
319 | struct kvm_vcpu *v, *ret = NULL; | |
320 | ||
321 | mutex_lock(&kvm->lock); | |
322 | kvm_for_each_vcpu(r, v, kvm) { | |
323 | if (v->vcpu_id == id) { | |
324 | ret = v; | |
325 | break; | |
326 | } | |
327 | } | |
328 | mutex_unlock(&kvm->lock); | |
329 | return ret; | |
330 | } | |
331 | ||
332 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) | |
333 | { | |
f13c13a0 | 334 | vpa->__old_status |= LPPACA_OLD_SHARED_PROC; |
02407552 | 335 | vpa->yield_count = cpu_to_be32(1); |
a8606e20 PM |
336 | } |
337 | ||
55b665b0 PM |
338 | static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, |
339 | unsigned long addr, unsigned long len) | |
340 | { | |
341 | /* check address is cacheline aligned */ | |
342 | if (addr & (L1_CACHE_BYTES - 1)) | |
343 | return -EINVAL; | |
344 | spin_lock(&vcpu->arch.vpa_update_lock); | |
345 | if (v->next_gpa != addr || v->len != len) { | |
346 | v->next_gpa = addr; | |
347 | v->len = addr ? len : 0; | |
348 | v->update_pending = 1; | |
349 | } | |
350 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
351 | return 0; | |
352 | } | |
353 | ||
2e25aa5f PM |
354 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
355 | struct reg_vpa { | |
356 | u32 dummy; | |
357 | union { | |
02407552 AG |
358 | __be16 hword; |
359 | __be32 word; | |
2e25aa5f PM |
360 | } length; |
361 | }; | |
362 | ||
363 | static int vpa_is_registered(struct kvmppc_vpa *vpap) | |
364 | { | |
365 | if (vpap->update_pending) | |
366 | return vpap->next_gpa != 0; | |
367 | return vpap->pinned_addr != NULL; | |
368 | } | |
369 | ||
a8606e20 PM |
370 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
371 | unsigned long flags, | |
372 | unsigned long vcpuid, unsigned long vpa) | |
373 | { | |
374 | struct kvm *kvm = vcpu->kvm; | |
93e60249 | 375 | unsigned long len, nb; |
a8606e20 PM |
376 | void *va; |
377 | struct kvm_vcpu *tvcpu; | |
2e25aa5f PM |
378 | int err; |
379 | int subfunc; | |
380 | struct kvmppc_vpa *vpap; | |
a8606e20 PM |
381 | |
382 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); | |
383 | if (!tvcpu) | |
384 | return H_PARAMETER; | |
385 | ||
2e25aa5f PM |
386 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
387 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || | |
388 | subfunc == H_VPA_REG_SLB) { | |
389 | /* Registering new area - address must be cache-line aligned */ | |
390 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) | |
a8606e20 | 391 | return H_PARAMETER; |
2e25aa5f PM |
392 | |
393 | /* convert logical addr to kernel addr and read length */ | |
93e60249 PM |
394 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
395 | if (va == NULL) | |
b2b2f165 | 396 | return H_PARAMETER; |
2e25aa5f | 397 | if (subfunc == H_VPA_REG_VPA) |
02407552 | 398 | len = be16_to_cpu(((struct reg_vpa *)va)->length.hword); |
a8606e20 | 399 | else |
02407552 | 400 | len = be32_to_cpu(((struct reg_vpa *)va)->length.word); |
c35635ef | 401 | kvmppc_unpin_guest_page(kvm, va, vpa, false); |
2e25aa5f PM |
402 | |
403 | /* Check length */ | |
404 | if (len > nb || len < sizeof(struct reg_vpa)) | |
405 | return H_PARAMETER; | |
406 | } else { | |
407 | vpa = 0; | |
408 | len = 0; | |
409 | } | |
410 | ||
411 | err = H_PARAMETER; | |
412 | vpap = NULL; | |
413 | spin_lock(&tvcpu->arch.vpa_update_lock); | |
414 | ||
415 | switch (subfunc) { | |
416 | case H_VPA_REG_VPA: /* register VPA */ | |
417 | if (len < sizeof(struct lppaca)) | |
a8606e20 | 418 | break; |
2e25aa5f PM |
419 | vpap = &tvcpu->arch.vpa; |
420 | err = 0; | |
421 | break; | |
422 | ||
423 | case H_VPA_REG_DTL: /* register DTL */ | |
424 | if (len < sizeof(struct dtl_entry)) | |
a8606e20 | 425 | break; |
2e25aa5f PM |
426 | len -= len % sizeof(struct dtl_entry); |
427 | ||
428 | /* Check that they have previously registered a VPA */ | |
429 | err = H_RESOURCE; | |
430 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 431 | break; |
2e25aa5f PM |
432 | |
433 | vpap = &tvcpu->arch.dtl; | |
434 | err = 0; | |
435 | break; | |
436 | ||
437 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ | |
438 | /* Check that they have previously registered a VPA */ | |
439 | err = H_RESOURCE; | |
440 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 441 | break; |
2e25aa5f PM |
442 | |
443 | vpap = &tvcpu->arch.slb_shadow; | |
444 | err = 0; | |
445 | break; | |
446 | ||
447 | case H_VPA_DEREG_VPA: /* deregister VPA */ | |
448 | /* Check they don't still have a DTL or SLB buf registered */ | |
449 | err = H_RESOURCE; | |
450 | if (vpa_is_registered(&tvcpu->arch.dtl) || | |
451 | vpa_is_registered(&tvcpu->arch.slb_shadow)) | |
a8606e20 | 452 | break; |
2e25aa5f PM |
453 | |
454 | vpap = &tvcpu->arch.vpa; | |
455 | err = 0; | |
456 | break; | |
457 | ||
458 | case H_VPA_DEREG_DTL: /* deregister DTL */ | |
459 | vpap = &tvcpu->arch.dtl; | |
460 | err = 0; | |
461 | break; | |
462 | ||
463 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ | |
464 | vpap = &tvcpu->arch.slb_shadow; | |
465 | err = 0; | |
466 | break; | |
467 | } | |
468 | ||
469 | if (vpap) { | |
470 | vpap->next_gpa = vpa; | |
471 | vpap->len = len; | |
472 | vpap->update_pending = 1; | |
a8606e20 | 473 | } |
93e60249 | 474 | |
2e25aa5f PM |
475 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
476 | ||
93e60249 | 477 | return err; |
a8606e20 PM |
478 | } |
479 | ||
081f323b | 480 | static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap) |
2e25aa5f | 481 | { |
081f323b | 482 | struct kvm *kvm = vcpu->kvm; |
2e25aa5f PM |
483 | void *va; |
484 | unsigned long nb; | |
081f323b | 485 | unsigned long gpa; |
2e25aa5f | 486 | |
081f323b PM |
487 | /* |
488 | * We need to pin the page pointed to by vpap->next_gpa, | |
489 | * but we can't call kvmppc_pin_guest_page under the lock | |
490 | * as it does get_user_pages() and down_read(). So we | |
491 | * have to drop the lock, pin the page, then get the lock | |
492 | * again and check that a new area didn't get registered | |
493 | * in the meantime. | |
494 | */ | |
495 | for (;;) { | |
496 | gpa = vpap->next_gpa; | |
497 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
498 | va = NULL; | |
499 | nb = 0; | |
500 | if (gpa) | |
c35635ef | 501 | va = kvmppc_pin_guest_page(kvm, gpa, &nb); |
081f323b PM |
502 | spin_lock(&vcpu->arch.vpa_update_lock); |
503 | if (gpa == vpap->next_gpa) | |
504 | break; | |
505 | /* sigh... unpin that one and try again */ | |
506 | if (va) | |
c35635ef | 507 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b PM |
508 | } |
509 | ||
510 | vpap->update_pending = 0; | |
511 | if (va && nb < vpap->len) { | |
512 | /* | |
513 | * If it's now too short, it must be that userspace | |
514 | * has changed the mappings underlying guest memory, | |
515 | * so unregister the region. | |
516 | */ | |
c35635ef | 517 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b | 518 | va = NULL; |
2e25aa5f PM |
519 | } |
520 | if (vpap->pinned_addr) | |
c35635ef PM |
521 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa, |
522 | vpap->dirty); | |
523 | vpap->gpa = gpa; | |
2e25aa5f | 524 | vpap->pinned_addr = va; |
c35635ef | 525 | vpap->dirty = false; |
2e25aa5f PM |
526 | if (va) |
527 | vpap->pinned_end = va + vpap->len; | |
528 | } | |
529 | ||
530 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) | |
531 | { | |
2f12f034 PM |
532 | if (!(vcpu->arch.vpa.update_pending || |
533 | vcpu->arch.slb_shadow.update_pending || | |
534 | vcpu->arch.dtl.update_pending)) | |
535 | return; | |
536 | ||
2e25aa5f PM |
537 | spin_lock(&vcpu->arch.vpa_update_lock); |
538 | if (vcpu->arch.vpa.update_pending) { | |
081f323b | 539 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); |
55b665b0 PM |
540 | if (vcpu->arch.vpa.pinned_addr) |
541 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); | |
2e25aa5f PM |
542 | } |
543 | if (vcpu->arch.dtl.update_pending) { | |
081f323b | 544 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); |
2e25aa5f PM |
545 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
546 | vcpu->arch.dtl_index = 0; | |
547 | } | |
548 | if (vcpu->arch.slb_shadow.update_pending) | |
081f323b | 549 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); |
2e25aa5f PM |
550 | spin_unlock(&vcpu->arch.vpa_update_lock); |
551 | } | |
552 | ||
c7b67670 PM |
553 | /* |
554 | * Return the accumulated stolen time for the vcore up until `now'. | |
555 | * The caller should hold the vcore lock. | |
556 | */ | |
557 | static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) | |
558 | { | |
559 | u64 p; | |
2711e248 | 560 | unsigned long flags; |
c7b67670 | 561 | |
2711e248 PM |
562 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
563 | p = vc->stolen_tb; | |
c7b67670 | 564 | if (vc->vcore_state != VCORE_INACTIVE && |
2711e248 PM |
565 | vc->preempt_tb != TB_NIL) |
566 | p += now - vc->preempt_tb; | |
567 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
c7b67670 PM |
568 | return p; |
569 | } | |
570 | ||
0456ec4f PM |
571 | static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
572 | struct kvmppc_vcore *vc) | |
573 | { | |
574 | struct dtl_entry *dt; | |
575 | struct lppaca *vpa; | |
c7b67670 PM |
576 | unsigned long stolen; |
577 | unsigned long core_stolen; | |
578 | u64 now; | |
0456ec4f PM |
579 | |
580 | dt = vcpu->arch.dtl_ptr; | |
581 | vpa = vcpu->arch.vpa.pinned_addr; | |
c7b67670 PM |
582 | now = mftb(); |
583 | core_stolen = vcore_stolen_time(vc, now); | |
584 | stolen = core_stolen - vcpu->arch.stolen_logged; | |
585 | vcpu->arch.stolen_logged = core_stolen; | |
bf3d32e1 | 586 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
587 | stolen += vcpu->arch.busy_stolen; |
588 | vcpu->arch.busy_stolen = 0; | |
bf3d32e1 | 589 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
0456ec4f PM |
590 | if (!dt || !vpa) |
591 | return; | |
592 | memset(dt, 0, sizeof(struct dtl_entry)); | |
593 | dt->dispatch_reason = 7; | |
02407552 AG |
594 | dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid); |
595 | dt->timebase = cpu_to_be64(now + vc->tb_offset); | |
596 | dt->enqueue_to_dispatch_time = cpu_to_be32(stolen); | |
597 | dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu)); | |
598 | dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr); | |
0456ec4f PM |
599 | ++dt; |
600 | if (dt == vcpu->arch.dtl.pinned_end) | |
601 | dt = vcpu->arch.dtl.pinned_addr; | |
602 | vcpu->arch.dtl_ptr = dt; | |
603 | /* order writing *dt vs. writing vpa->dtl_idx */ | |
604 | smp_wmb(); | |
02407552 | 605 | vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index); |
c35635ef | 606 | vcpu->arch.dtl.dirty = true; |
0456ec4f PM |
607 | } |
608 | ||
9642382e MN |
609 | static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu) |
610 | { | |
611 | if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207) | |
612 | return true; | |
613 | if ((!vcpu->arch.vcore->arch_compat) && | |
614 | cpu_has_feature(CPU_FTR_ARCH_207S)) | |
615 | return true; | |
616 | return false; | |
617 | } | |
618 | ||
619 | static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, | |
620 | unsigned long resource, unsigned long value1, | |
621 | unsigned long value2) | |
622 | { | |
623 | switch (resource) { | |
624 | case H_SET_MODE_RESOURCE_SET_CIABR: | |
625 | if (!kvmppc_power8_compatible(vcpu)) | |
626 | return H_P2; | |
627 | if (value2) | |
628 | return H_P4; | |
629 | if (mflags) | |
630 | return H_UNSUPPORTED_FLAG_START; | |
631 | /* Guests can't breakpoint the hypervisor */ | |
632 | if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
633 | return H_P3; | |
634 | vcpu->arch.ciabr = value1; | |
635 | return H_SUCCESS; | |
636 | case H_SET_MODE_RESOURCE_SET_DAWR: | |
637 | if (!kvmppc_power8_compatible(vcpu)) | |
638 | return H_P2; | |
639 | if (mflags) | |
640 | return H_UNSUPPORTED_FLAG_START; | |
641 | if (value2 & DABRX_HYP) | |
642 | return H_P4; | |
643 | vcpu->arch.dawr = value1; | |
644 | vcpu->arch.dawrx = value2; | |
645 | return H_SUCCESS; | |
646 | default: | |
647 | return H_TOO_HARD; | |
648 | } | |
649 | } | |
650 | ||
90fd09f8 SB |
651 | static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target) |
652 | { | |
653 | struct kvmppc_vcore *vcore = target->arch.vcore; | |
654 | ||
655 | /* | |
656 | * We expect to have been called by the real mode handler | |
657 | * (kvmppc_rm_h_confer()) which would have directly returned | |
658 | * H_SUCCESS if the source vcore wasn't idle (e.g. if it may | |
659 | * have useful work to do and should not confer) so we don't | |
660 | * recheck that here. | |
661 | */ | |
662 | ||
663 | spin_lock(&vcore->lock); | |
664 | if (target->arch.state == KVMPPC_VCPU_RUNNABLE && | |
ec257165 PM |
665 | vcore->vcore_state != VCORE_INACTIVE && |
666 | vcore->runner) | |
90fd09f8 SB |
667 | target = vcore->runner; |
668 | spin_unlock(&vcore->lock); | |
669 | ||
670 | return kvm_vcpu_yield_to(target); | |
671 | } | |
672 | ||
673 | static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu) | |
674 | { | |
675 | int yield_count = 0; | |
676 | struct lppaca *lppaca; | |
677 | ||
678 | spin_lock(&vcpu->arch.vpa_update_lock); | |
679 | lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr; | |
680 | if (lppaca) | |
ecb6d618 | 681 | yield_count = be32_to_cpu(lppaca->yield_count); |
90fd09f8 SB |
682 | spin_unlock(&vcpu->arch.vpa_update_lock); |
683 | return yield_count; | |
684 | } | |
685 | ||
a8606e20 PM |
686 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
687 | { | |
688 | unsigned long req = kvmppc_get_gpr(vcpu, 3); | |
689 | unsigned long target, ret = H_SUCCESS; | |
90fd09f8 | 690 | int yield_count; |
a8606e20 | 691 | struct kvm_vcpu *tvcpu; |
8e591cb7 | 692 | int idx, rc; |
a8606e20 | 693 | |
699a0ea0 PM |
694 | if (req <= MAX_HCALL_OPCODE && |
695 | !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls)) | |
696 | return RESUME_HOST; | |
697 | ||
a8606e20 PM |
698 | switch (req) { |
699 | case H_CEDE: | |
a8606e20 PM |
700 | break; |
701 | case H_PROD: | |
702 | target = kvmppc_get_gpr(vcpu, 4); | |
703 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
704 | if (!tvcpu) { | |
705 | ret = H_PARAMETER; | |
706 | break; | |
707 | } | |
708 | tvcpu->arch.prodded = 1; | |
709 | smp_mb(); | |
710 | if (vcpu->arch.ceded) { | |
711 | if (waitqueue_active(&vcpu->wq)) { | |
712 | wake_up_interruptible(&vcpu->wq); | |
713 | vcpu->stat.halt_wakeup++; | |
714 | } | |
715 | } | |
716 | break; | |
717 | case H_CONFER: | |
42d7604d PM |
718 | target = kvmppc_get_gpr(vcpu, 4); |
719 | if (target == -1) | |
720 | break; | |
721 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
722 | if (!tvcpu) { | |
723 | ret = H_PARAMETER; | |
724 | break; | |
725 | } | |
90fd09f8 SB |
726 | yield_count = kvmppc_get_gpr(vcpu, 5); |
727 | if (kvmppc_get_yield_count(tvcpu) != yield_count) | |
728 | break; | |
729 | kvm_arch_vcpu_yield_to(tvcpu); | |
a8606e20 PM |
730 | break; |
731 | case H_REGISTER_VPA: | |
732 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), | |
733 | kvmppc_get_gpr(vcpu, 5), | |
734 | kvmppc_get_gpr(vcpu, 6)); | |
735 | break; | |
8e591cb7 ME |
736 | case H_RTAS: |
737 | if (list_empty(&vcpu->kvm->arch.rtas_tokens)) | |
738 | return RESUME_HOST; | |
739 | ||
c9438092 | 740 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
8e591cb7 | 741 | rc = kvmppc_rtas_hcall(vcpu); |
c9438092 | 742 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8e591cb7 ME |
743 | |
744 | if (rc == -ENOENT) | |
745 | return RESUME_HOST; | |
746 | else if (rc == 0) | |
747 | break; | |
748 | ||
749 | /* Send the error out to userspace via KVM_RUN */ | |
750 | return rc; | |
99342cf8 DG |
751 | case H_LOGICAL_CI_LOAD: |
752 | ret = kvmppc_h_logical_ci_load(vcpu); | |
753 | if (ret == H_TOO_HARD) | |
754 | return RESUME_HOST; | |
755 | break; | |
756 | case H_LOGICAL_CI_STORE: | |
757 | ret = kvmppc_h_logical_ci_store(vcpu); | |
758 | if (ret == H_TOO_HARD) | |
759 | return RESUME_HOST; | |
760 | break; | |
9642382e MN |
761 | case H_SET_MODE: |
762 | ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4), | |
763 | kvmppc_get_gpr(vcpu, 5), | |
764 | kvmppc_get_gpr(vcpu, 6), | |
765 | kvmppc_get_gpr(vcpu, 7)); | |
766 | if (ret == H_TOO_HARD) | |
767 | return RESUME_HOST; | |
768 | break; | |
bc5ad3f3 BH |
769 | case H_XIRR: |
770 | case H_CPPR: | |
771 | case H_EOI: | |
772 | case H_IPI: | |
8e44ddc3 PM |
773 | case H_IPOLL: |
774 | case H_XIRR_X: | |
bc5ad3f3 BH |
775 | if (kvmppc_xics_enabled(vcpu)) { |
776 | ret = kvmppc_xics_hcall(vcpu, req); | |
777 | break; | |
778 | } /* fallthrough */ | |
a8606e20 PM |
779 | default: |
780 | return RESUME_HOST; | |
781 | } | |
782 | kvmppc_set_gpr(vcpu, 3, ret); | |
783 | vcpu->arch.hcall_needed = 0; | |
784 | return RESUME_GUEST; | |
785 | } | |
786 | ||
ae2113a4 PM |
787 | static int kvmppc_hcall_impl_hv(unsigned long cmd) |
788 | { | |
789 | switch (cmd) { | |
790 | case H_CEDE: | |
791 | case H_PROD: | |
792 | case H_CONFER: | |
793 | case H_REGISTER_VPA: | |
9642382e | 794 | case H_SET_MODE: |
99342cf8 DG |
795 | case H_LOGICAL_CI_LOAD: |
796 | case H_LOGICAL_CI_STORE: | |
ae2113a4 PM |
797 | #ifdef CONFIG_KVM_XICS |
798 | case H_XIRR: | |
799 | case H_CPPR: | |
800 | case H_EOI: | |
801 | case H_IPI: | |
802 | case H_IPOLL: | |
803 | case H_XIRR_X: | |
804 | #endif | |
805 | return 1; | |
806 | } | |
807 | ||
808 | /* See if it's in the real-mode table */ | |
809 | return kvmppc_hcall_impl_hv_realmode(cmd); | |
810 | } | |
811 | ||
a59c1d9e MS |
812 | static int kvmppc_emulate_debug_inst(struct kvm_run *run, |
813 | struct kvm_vcpu *vcpu) | |
814 | { | |
815 | u32 last_inst; | |
816 | ||
817 | if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) != | |
818 | EMULATE_DONE) { | |
819 | /* | |
820 | * Fetch failed, so return to guest and | |
821 | * try executing it again. | |
822 | */ | |
823 | return RESUME_GUEST; | |
824 | } | |
825 | ||
826 | if (last_inst == KVMPPC_INST_SW_BREAKPOINT) { | |
827 | run->exit_reason = KVM_EXIT_DEBUG; | |
828 | run->debug.arch.address = kvmppc_get_pc(vcpu); | |
829 | return RESUME_HOST; | |
830 | } else { | |
831 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
832 | return RESUME_GUEST; | |
833 | } | |
834 | } | |
835 | ||
3a167bea AK |
836 | static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, |
837 | struct task_struct *tsk) | |
de56a948 PM |
838 | { |
839 | int r = RESUME_HOST; | |
840 | ||
841 | vcpu->stat.sum_exits++; | |
842 | ||
843 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
844 | run->ready_for_interrupt_injection = 1; | |
845 | switch (vcpu->arch.trap) { | |
846 | /* We're good on these - the host merely wanted to get our attention */ | |
847 | case BOOK3S_INTERRUPT_HV_DECREMENTER: | |
848 | vcpu->stat.dec_exits++; | |
849 | r = RESUME_GUEST; | |
850 | break; | |
851 | case BOOK3S_INTERRUPT_EXTERNAL: | |
5d00f66b | 852 | case BOOK3S_INTERRUPT_H_DOORBELL: |
de56a948 PM |
853 | vcpu->stat.ext_intr_exits++; |
854 | r = RESUME_GUEST; | |
855 | break; | |
dee6f24c MS |
856 | /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/ |
857 | case BOOK3S_INTERRUPT_HMI: | |
de56a948 PM |
858 | case BOOK3S_INTERRUPT_PERFMON: |
859 | r = RESUME_GUEST; | |
860 | break; | |
b4072df4 PM |
861 | case BOOK3S_INTERRUPT_MACHINE_CHECK: |
862 | /* | |
863 | * Deliver a machine check interrupt to the guest. | |
864 | * We have to do this, even if the host has handled the | |
865 | * machine check, because machine checks use SRR0/1 and | |
866 | * the interrupt might have trashed guest state in them. | |
867 | */ | |
868 | kvmppc_book3s_queue_irqprio(vcpu, | |
869 | BOOK3S_INTERRUPT_MACHINE_CHECK); | |
870 | r = RESUME_GUEST; | |
871 | break; | |
de56a948 PM |
872 | case BOOK3S_INTERRUPT_PROGRAM: |
873 | { | |
874 | ulong flags; | |
875 | /* | |
876 | * Normally program interrupts are delivered directly | |
877 | * to the guest by the hardware, but we can get here | |
878 | * as a result of a hypervisor emulation interrupt | |
879 | * (e40) getting turned into a 700 by BML RTAS. | |
880 | */ | |
881 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; | |
882 | kvmppc_core_queue_program(vcpu, flags); | |
883 | r = RESUME_GUEST; | |
884 | break; | |
885 | } | |
886 | case BOOK3S_INTERRUPT_SYSCALL: | |
887 | { | |
888 | /* hcall - punt to userspace */ | |
889 | int i; | |
890 | ||
27025a60 LPF |
891 | /* hypercall with MSR_PR has already been handled in rmode, |
892 | * and never reaches here. | |
893 | */ | |
894 | ||
de56a948 PM |
895 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
896 | for (i = 0; i < 9; ++i) | |
897 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); | |
898 | run->exit_reason = KVM_EXIT_PAPR_HCALL; | |
899 | vcpu->arch.hcall_needed = 1; | |
900 | r = RESUME_HOST; | |
901 | break; | |
902 | } | |
903 | /* | |
342d3db7 PM |
904 | * We get these next two if the guest accesses a page which it thinks |
905 | * it has mapped but which is not actually present, either because | |
906 | * it is for an emulated I/O device or because the corresonding | |
907 | * host page has been paged out. Any other HDSI/HISI interrupts | |
908 | * have been handled already. | |
de56a948 PM |
909 | */ |
910 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: | |
913d3ff9 | 911 | r = RESUME_PAGE_FAULT; |
de56a948 PM |
912 | break; |
913 | case BOOK3S_INTERRUPT_H_INST_STORAGE: | |
913d3ff9 PM |
914 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
915 | vcpu->arch.fault_dsisr = 0; | |
916 | r = RESUME_PAGE_FAULT; | |
de56a948 PM |
917 | break; |
918 | /* | |
919 | * This occurs if the guest executes an illegal instruction. | |
a59c1d9e MS |
920 | * If the guest debug is disabled, generate a program interrupt |
921 | * to the guest. If guest debug is enabled, we need to check | |
922 | * whether the instruction is a software breakpoint instruction. | |
923 | * Accordingly return to Guest or Host. | |
de56a948 PM |
924 | */ |
925 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: | |
4a157d61 PM |
926 | if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED) |
927 | vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ? | |
928 | swab32(vcpu->arch.emul_inst) : | |
929 | vcpu->arch.emul_inst; | |
a59c1d9e MS |
930 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) { |
931 | r = kvmppc_emulate_debug_inst(run, vcpu); | |
932 | } else { | |
933 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
934 | r = RESUME_GUEST; | |
935 | } | |
bd3048b8 ME |
936 | break; |
937 | /* | |
938 | * This occurs if the guest (kernel or userspace), does something that | |
939 | * is prohibited by HFSCR. We just generate a program interrupt to | |
940 | * the guest. | |
941 | */ | |
942 | case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: | |
943 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
de56a948 PM |
944 | r = RESUME_GUEST; |
945 | break; | |
946 | default: | |
947 | kvmppc_dump_regs(vcpu); | |
948 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
949 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
950 | vcpu->arch.shregs.msr); | |
f3271d4c | 951 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
de56a948 | 952 | r = RESUME_HOST; |
de56a948 PM |
953 | break; |
954 | } | |
955 | ||
de56a948 PM |
956 | return r; |
957 | } | |
958 | ||
3a167bea AK |
959 | static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu, |
960 | struct kvm_sregs *sregs) | |
de56a948 PM |
961 | { |
962 | int i; | |
963 | ||
de56a948 | 964 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
87916442 | 965 | sregs->pvr = vcpu->arch.pvr; |
de56a948 PM |
966 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
967 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; | |
968 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; | |
969 | } | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
3a167bea AK |
974 | static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, |
975 | struct kvm_sregs *sregs) | |
de56a948 PM |
976 | { |
977 | int i, j; | |
978 | ||
9333e6c4 PM |
979 | /* Only accept the same PVR as the host's, since we can't spoof it */ |
980 | if (sregs->pvr != vcpu->arch.pvr) | |
981 | return -EINVAL; | |
de56a948 PM |
982 | |
983 | j = 0; | |
984 | for (i = 0; i < vcpu->arch.slb_nr; i++) { | |
985 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { | |
986 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; | |
987 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; | |
988 | ++j; | |
989 | } | |
990 | } | |
991 | vcpu->arch.slb_max = j; | |
992 | ||
993 | return 0; | |
994 | } | |
995 | ||
a0840240 AK |
996 | static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr, |
997 | bool preserve_top32) | |
a0144e2a | 998 | { |
8f902b00 | 999 | struct kvm *kvm = vcpu->kvm; |
a0144e2a PM |
1000 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
1001 | u64 mask; | |
1002 | ||
8f902b00 | 1003 | mutex_lock(&kvm->lock); |
a0144e2a | 1004 | spin_lock(&vc->lock); |
d682916a AB |
1005 | /* |
1006 | * If ILE (interrupt little-endian) has changed, update the | |
1007 | * MSR_LE bit in the intr_msr for each vcpu in this vcore. | |
1008 | */ | |
1009 | if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) { | |
d682916a AB |
1010 | struct kvm_vcpu *vcpu; |
1011 | int i; | |
1012 | ||
d682916a AB |
1013 | kvm_for_each_vcpu(i, vcpu, kvm) { |
1014 | if (vcpu->arch.vcore != vc) | |
1015 | continue; | |
1016 | if (new_lpcr & LPCR_ILE) | |
1017 | vcpu->arch.intr_msr |= MSR_LE; | |
1018 | else | |
1019 | vcpu->arch.intr_msr &= ~MSR_LE; | |
1020 | } | |
d682916a AB |
1021 | } |
1022 | ||
a0144e2a PM |
1023 | /* |
1024 | * Userspace can only modify DPFD (default prefetch depth), | |
1025 | * ILE (interrupt little-endian) and TC (translation control). | |
e0622bd9 | 1026 | * On POWER8 userspace can also modify AIL (alt. interrupt loc.) |
a0144e2a PM |
1027 | */ |
1028 | mask = LPCR_DPFD | LPCR_ILE | LPCR_TC; | |
e0622bd9 PM |
1029 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
1030 | mask |= LPCR_AIL; | |
a0840240 AK |
1031 | |
1032 | /* Broken 32-bit version of LPCR must not clear top bits */ | |
1033 | if (preserve_top32) | |
1034 | mask &= 0xFFFFFFFF; | |
a0144e2a PM |
1035 | vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); |
1036 | spin_unlock(&vc->lock); | |
8f902b00 | 1037 | mutex_unlock(&kvm->lock); |
a0144e2a PM |
1038 | } |
1039 | ||
3a167bea AK |
1040 | static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1041 | union kvmppc_one_reg *val) | |
31f3438e | 1042 | { |
a136a8bd PM |
1043 | int r = 0; |
1044 | long int i; | |
31f3438e | 1045 | |
a136a8bd | 1046 | switch (id) { |
a59c1d9e MS |
1047 | case KVM_REG_PPC_DEBUG_INST: |
1048 | *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); | |
1049 | break; | |
31f3438e | 1050 | case KVM_REG_PPC_HIOR: |
a136a8bd PM |
1051 | *val = get_reg_val(id, 0); |
1052 | break; | |
1053 | case KVM_REG_PPC_DABR: | |
1054 | *val = get_reg_val(id, vcpu->arch.dabr); | |
1055 | break; | |
8563bf52 PM |
1056 | case KVM_REG_PPC_DABRX: |
1057 | *val = get_reg_val(id, vcpu->arch.dabrx); | |
1058 | break; | |
a136a8bd PM |
1059 | case KVM_REG_PPC_DSCR: |
1060 | *val = get_reg_val(id, vcpu->arch.dscr); | |
1061 | break; | |
1062 | case KVM_REG_PPC_PURR: | |
1063 | *val = get_reg_val(id, vcpu->arch.purr); | |
1064 | break; | |
1065 | case KVM_REG_PPC_SPURR: | |
1066 | *val = get_reg_val(id, vcpu->arch.spurr); | |
1067 | break; | |
1068 | case KVM_REG_PPC_AMR: | |
1069 | *val = get_reg_val(id, vcpu->arch.amr); | |
1070 | break; | |
1071 | case KVM_REG_PPC_UAMOR: | |
1072 | *val = get_reg_val(id, vcpu->arch.uamor); | |
1073 | break; | |
b005255e | 1074 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1075 | i = id - KVM_REG_PPC_MMCR0; |
1076 | *val = get_reg_val(id, vcpu->arch.mmcr[i]); | |
1077 | break; | |
1078 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1079 | i = id - KVM_REG_PPC_PMC1; | |
1080 | *val = get_reg_val(id, vcpu->arch.pmc[i]); | |
31f3438e | 1081 | break; |
b005255e MN |
1082 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1083 | i = id - KVM_REG_PPC_SPMC1; | |
1084 | *val = get_reg_val(id, vcpu->arch.spmc[i]); | |
1085 | break; | |
14941789 PM |
1086 | case KVM_REG_PPC_SIAR: |
1087 | *val = get_reg_val(id, vcpu->arch.siar); | |
1088 | break; | |
1089 | case KVM_REG_PPC_SDAR: | |
1090 | *val = get_reg_val(id, vcpu->arch.sdar); | |
1091 | break; | |
b005255e MN |
1092 | case KVM_REG_PPC_SIER: |
1093 | *val = get_reg_val(id, vcpu->arch.sier); | |
a8bd19ef | 1094 | break; |
b005255e MN |
1095 | case KVM_REG_PPC_IAMR: |
1096 | *val = get_reg_val(id, vcpu->arch.iamr); | |
1097 | break; | |
b005255e MN |
1098 | case KVM_REG_PPC_PSPB: |
1099 | *val = get_reg_val(id, vcpu->arch.pspb); | |
1100 | break; | |
b005255e MN |
1101 | case KVM_REG_PPC_DPDES: |
1102 | *val = get_reg_val(id, vcpu->arch.vcore->dpdes); | |
1103 | break; | |
1104 | case KVM_REG_PPC_DAWR: | |
1105 | *val = get_reg_val(id, vcpu->arch.dawr); | |
1106 | break; | |
1107 | case KVM_REG_PPC_DAWRX: | |
1108 | *val = get_reg_val(id, vcpu->arch.dawrx); | |
1109 | break; | |
1110 | case KVM_REG_PPC_CIABR: | |
1111 | *val = get_reg_val(id, vcpu->arch.ciabr); | |
1112 | break; | |
b005255e MN |
1113 | case KVM_REG_PPC_CSIGR: |
1114 | *val = get_reg_val(id, vcpu->arch.csigr); | |
1115 | break; | |
1116 | case KVM_REG_PPC_TACR: | |
1117 | *val = get_reg_val(id, vcpu->arch.tacr); | |
1118 | break; | |
1119 | case KVM_REG_PPC_TCSCR: | |
1120 | *val = get_reg_val(id, vcpu->arch.tcscr); | |
1121 | break; | |
1122 | case KVM_REG_PPC_PID: | |
1123 | *val = get_reg_val(id, vcpu->arch.pid); | |
1124 | break; | |
1125 | case KVM_REG_PPC_ACOP: | |
1126 | *val = get_reg_val(id, vcpu->arch.acop); | |
1127 | break; | |
1128 | case KVM_REG_PPC_WORT: | |
1129 | *val = get_reg_val(id, vcpu->arch.wort); | |
a8bd19ef | 1130 | break; |
55b665b0 PM |
1131 | case KVM_REG_PPC_VPA_ADDR: |
1132 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1133 | *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); | |
1134 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1135 | break; | |
1136 | case KVM_REG_PPC_VPA_SLB: | |
1137 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1138 | val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; | |
1139 | val->vpaval.length = vcpu->arch.slb_shadow.len; | |
1140 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1141 | break; | |
1142 | case KVM_REG_PPC_VPA_DTL: | |
1143 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1144 | val->vpaval.addr = vcpu->arch.dtl.next_gpa; | |
1145 | val->vpaval.length = vcpu->arch.dtl.len; | |
1146 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1147 | break; | |
93b0f4dc PM |
1148 | case KVM_REG_PPC_TB_OFFSET: |
1149 | *val = get_reg_val(id, vcpu->arch.vcore->tb_offset); | |
1150 | break; | |
a0144e2a | 1151 | case KVM_REG_PPC_LPCR: |
a0840240 | 1152 | case KVM_REG_PPC_LPCR_64: |
a0144e2a PM |
1153 | *val = get_reg_val(id, vcpu->arch.vcore->lpcr); |
1154 | break; | |
4b8473c9 PM |
1155 | case KVM_REG_PPC_PPR: |
1156 | *val = get_reg_val(id, vcpu->arch.ppr); | |
1157 | break; | |
a7d80d01 MN |
1158 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1159 | case KVM_REG_PPC_TFHAR: | |
1160 | *val = get_reg_val(id, vcpu->arch.tfhar); | |
1161 | break; | |
1162 | case KVM_REG_PPC_TFIAR: | |
1163 | *val = get_reg_val(id, vcpu->arch.tfiar); | |
1164 | break; | |
1165 | case KVM_REG_PPC_TEXASR: | |
1166 | *val = get_reg_val(id, vcpu->arch.texasr); | |
1167 | break; | |
1168 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1169 | i = id - KVM_REG_PPC_TM_GPR0; | |
1170 | *val = get_reg_val(id, vcpu->arch.gpr_tm[i]); | |
1171 | break; | |
1172 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1173 | { | |
1174 | int j; | |
1175 | i = id - KVM_REG_PPC_TM_VSR0; | |
1176 | if (i < 32) | |
1177 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1178 | val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j]; | |
1179 | else { | |
1180 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1181 | val->vval = vcpu->arch.vr_tm.vr[i-32]; | |
1182 | else | |
1183 | r = -ENXIO; | |
1184 | } | |
1185 | break; | |
1186 | } | |
1187 | case KVM_REG_PPC_TM_CR: | |
1188 | *val = get_reg_val(id, vcpu->arch.cr_tm); | |
1189 | break; | |
1190 | case KVM_REG_PPC_TM_LR: | |
1191 | *val = get_reg_val(id, vcpu->arch.lr_tm); | |
1192 | break; | |
1193 | case KVM_REG_PPC_TM_CTR: | |
1194 | *val = get_reg_val(id, vcpu->arch.ctr_tm); | |
1195 | break; | |
1196 | case KVM_REG_PPC_TM_FPSCR: | |
1197 | *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr); | |
1198 | break; | |
1199 | case KVM_REG_PPC_TM_AMR: | |
1200 | *val = get_reg_val(id, vcpu->arch.amr_tm); | |
1201 | break; | |
1202 | case KVM_REG_PPC_TM_PPR: | |
1203 | *val = get_reg_val(id, vcpu->arch.ppr_tm); | |
1204 | break; | |
1205 | case KVM_REG_PPC_TM_VRSAVE: | |
1206 | *val = get_reg_val(id, vcpu->arch.vrsave_tm); | |
1207 | break; | |
1208 | case KVM_REG_PPC_TM_VSCR: | |
1209 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1210 | *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]); | |
1211 | else | |
1212 | r = -ENXIO; | |
1213 | break; | |
1214 | case KVM_REG_PPC_TM_DSCR: | |
1215 | *val = get_reg_val(id, vcpu->arch.dscr_tm); | |
1216 | break; | |
1217 | case KVM_REG_PPC_TM_TAR: | |
1218 | *val = get_reg_val(id, vcpu->arch.tar_tm); | |
1219 | break; | |
1220 | #endif | |
388cc6e1 PM |
1221 | case KVM_REG_PPC_ARCH_COMPAT: |
1222 | *val = get_reg_val(id, vcpu->arch.vcore->arch_compat); | |
1223 | break; | |
31f3438e | 1224 | default: |
a136a8bd | 1225 | r = -EINVAL; |
31f3438e PM |
1226 | break; |
1227 | } | |
1228 | ||
1229 | return r; | |
1230 | } | |
1231 | ||
3a167bea AK |
1232 | static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1233 | union kvmppc_one_reg *val) | |
31f3438e | 1234 | { |
a136a8bd PM |
1235 | int r = 0; |
1236 | long int i; | |
55b665b0 | 1237 | unsigned long addr, len; |
31f3438e | 1238 | |
a136a8bd | 1239 | switch (id) { |
31f3438e | 1240 | case KVM_REG_PPC_HIOR: |
31f3438e | 1241 | /* Only allow this to be set to zero */ |
a136a8bd | 1242 | if (set_reg_val(id, *val)) |
31f3438e PM |
1243 | r = -EINVAL; |
1244 | break; | |
a136a8bd PM |
1245 | case KVM_REG_PPC_DABR: |
1246 | vcpu->arch.dabr = set_reg_val(id, *val); | |
1247 | break; | |
8563bf52 PM |
1248 | case KVM_REG_PPC_DABRX: |
1249 | vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP; | |
1250 | break; | |
a136a8bd PM |
1251 | case KVM_REG_PPC_DSCR: |
1252 | vcpu->arch.dscr = set_reg_val(id, *val); | |
1253 | break; | |
1254 | case KVM_REG_PPC_PURR: | |
1255 | vcpu->arch.purr = set_reg_val(id, *val); | |
1256 | break; | |
1257 | case KVM_REG_PPC_SPURR: | |
1258 | vcpu->arch.spurr = set_reg_val(id, *val); | |
1259 | break; | |
1260 | case KVM_REG_PPC_AMR: | |
1261 | vcpu->arch.amr = set_reg_val(id, *val); | |
1262 | break; | |
1263 | case KVM_REG_PPC_UAMOR: | |
1264 | vcpu->arch.uamor = set_reg_val(id, *val); | |
1265 | break; | |
b005255e | 1266 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1267 | i = id - KVM_REG_PPC_MMCR0; |
1268 | vcpu->arch.mmcr[i] = set_reg_val(id, *val); | |
1269 | break; | |
1270 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1271 | i = id - KVM_REG_PPC_PMC1; | |
1272 | vcpu->arch.pmc[i] = set_reg_val(id, *val); | |
1273 | break; | |
b005255e MN |
1274 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1275 | i = id - KVM_REG_PPC_SPMC1; | |
1276 | vcpu->arch.spmc[i] = set_reg_val(id, *val); | |
1277 | break; | |
14941789 PM |
1278 | case KVM_REG_PPC_SIAR: |
1279 | vcpu->arch.siar = set_reg_val(id, *val); | |
1280 | break; | |
1281 | case KVM_REG_PPC_SDAR: | |
1282 | vcpu->arch.sdar = set_reg_val(id, *val); | |
1283 | break; | |
b005255e MN |
1284 | case KVM_REG_PPC_SIER: |
1285 | vcpu->arch.sier = set_reg_val(id, *val); | |
a8bd19ef | 1286 | break; |
b005255e MN |
1287 | case KVM_REG_PPC_IAMR: |
1288 | vcpu->arch.iamr = set_reg_val(id, *val); | |
1289 | break; | |
b005255e MN |
1290 | case KVM_REG_PPC_PSPB: |
1291 | vcpu->arch.pspb = set_reg_val(id, *val); | |
1292 | break; | |
b005255e MN |
1293 | case KVM_REG_PPC_DPDES: |
1294 | vcpu->arch.vcore->dpdes = set_reg_val(id, *val); | |
1295 | break; | |
1296 | case KVM_REG_PPC_DAWR: | |
1297 | vcpu->arch.dawr = set_reg_val(id, *val); | |
1298 | break; | |
1299 | case KVM_REG_PPC_DAWRX: | |
1300 | vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP; | |
1301 | break; | |
1302 | case KVM_REG_PPC_CIABR: | |
1303 | vcpu->arch.ciabr = set_reg_val(id, *val); | |
1304 | /* Don't allow setting breakpoints in hypervisor code */ | |
1305 | if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
1306 | vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */ | |
1307 | break; | |
b005255e MN |
1308 | case KVM_REG_PPC_CSIGR: |
1309 | vcpu->arch.csigr = set_reg_val(id, *val); | |
1310 | break; | |
1311 | case KVM_REG_PPC_TACR: | |
1312 | vcpu->arch.tacr = set_reg_val(id, *val); | |
1313 | break; | |
1314 | case KVM_REG_PPC_TCSCR: | |
1315 | vcpu->arch.tcscr = set_reg_val(id, *val); | |
1316 | break; | |
1317 | case KVM_REG_PPC_PID: | |
1318 | vcpu->arch.pid = set_reg_val(id, *val); | |
1319 | break; | |
1320 | case KVM_REG_PPC_ACOP: | |
1321 | vcpu->arch.acop = set_reg_val(id, *val); | |
1322 | break; | |
1323 | case KVM_REG_PPC_WORT: | |
1324 | vcpu->arch.wort = set_reg_val(id, *val); | |
a8bd19ef | 1325 | break; |
55b665b0 PM |
1326 | case KVM_REG_PPC_VPA_ADDR: |
1327 | addr = set_reg_val(id, *val); | |
1328 | r = -EINVAL; | |
1329 | if (!addr && (vcpu->arch.slb_shadow.next_gpa || | |
1330 | vcpu->arch.dtl.next_gpa)) | |
1331 | break; | |
1332 | r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); | |
1333 | break; | |
1334 | case KVM_REG_PPC_VPA_SLB: | |
1335 | addr = val->vpaval.addr; | |
1336 | len = val->vpaval.length; | |
1337 | r = -EINVAL; | |
1338 | if (addr && !vcpu->arch.vpa.next_gpa) | |
1339 | break; | |
1340 | r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); | |
1341 | break; | |
1342 | case KVM_REG_PPC_VPA_DTL: | |
1343 | addr = val->vpaval.addr; | |
1344 | len = val->vpaval.length; | |
1345 | r = -EINVAL; | |
9f8c8c78 PM |
1346 | if (addr && (len < sizeof(struct dtl_entry) || |
1347 | !vcpu->arch.vpa.next_gpa)) | |
55b665b0 PM |
1348 | break; |
1349 | len -= len % sizeof(struct dtl_entry); | |
1350 | r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); | |
1351 | break; | |
93b0f4dc PM |
1352 | case KVM_REG_PPC_TB_OFFSET: |
1353 | /* round up to multiple of 2^24 */ | |
1354 | vcpu->arch.vcore->tb_offset = | |
1355 | ALIGN(set_reg_val(id, *val), 1UL << 24); | |
1356 | break; | |
a0144e2a | 1357 | case KVM_REG_PPC_LPCR: |
a0840240 AK |
1358 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true); |
1359 | break; | |
1360 | case KVM_REG_PPC_LPCR_64: | |
1361 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false); | |
a0144e2a | 1362 | break; |
4b8473c9 PM |
1363 | case KVM_REG_PPC_PPR: |
1364 | vcpu->arch.ppr = set_reg_val(id, *val); | |
1365 | break; | |
a7d80d01 MN |
1366 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1367 | case KVM_REG_PPC_TFHAR: | |
1368 | vcpu->arch.tfhar = set_reg_val(id, *val); | |
1369 | break; | |
1370 | case KVM_REG_PPC_TFIAR: | |
1371 | vcpu->arch.tfiar = set_reg_val(id, *val); | |
1372 | break; | |
1373 | case KVM_REG_PPC_TEXASR: | |
1374 | vcpu->arch.texasr = set_reg_val(id, *val); | |
1375 | break; | |
1376 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1377 | i = id - KVM_REG_PPC_TM_GPR0; | |
1378 | vcpu->arch.gpr_tm[i] = set_reg_val(id, *val); | |
1379 | break; | |
1380 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1381 | { | |
1382 | int j; | |
1383 | i = id - KVM_REG_PPC_TM_VSR0; | |
1384 | if (i < 32) | |
1385 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1386 | vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j]; | |
1387 | else | |
1388 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1389 | vcpu->arch.vr_tm.vr[i-32] = val->vval; | |
1390 | else | |
1391 | r = -ENXIO; | |
1392 | break; | |
1393 | } | |
1394 | case KVM_REG_PPC_TM_CR: | |
1395 | vcpu->arch.cr_tm = set_reg_val(id, *val); | |
1396 | break; | |
1397 | case KVM_REG_PPC_TM_LR: | |
1398 | vcpu->arch.lr_tm = set_reg_val(id, *val); | |
1399 | break; | |
1400 | case KVM_REG_PPC_TM_CTR: | |
1401 | vcpu->arch.ctr_tm = set_reg_val(id, *val); | |
1402 | break; | |
1403 | case KVM_REG_PPC_TM_FPSCR: | |
1404 | vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val); | |
1405 | break; | |
1406 | case KVM_REG_PPC_TM_AMR: | |
1407 | vcpu->arch.amr_tm = set_reg_val(id, *val); | |
1408 | break; | |
1409 | case KVM_REG_PPC_TM_PPR: | |
1410 | vcpu->arch.ppr_tm = set_reg_val(id, *val); | |
1411 | break; | |
1412 | case KVM_REG_PPC_TM_VRSAVE: | |
1413 | vcpu->arch.vrsave_tm = set_reg_val(id, *val); | |
1414 | break; | |
1415 | case KVM_REG_PPC_TM_VSCR: | |
1416 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1417 | vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val); | |
1418 | else | |
1419 | r = - ENXIO; | |
1420 | break; | |
1421 | case KVM_REG_PPC_TM_DSCR: | |
1422 | vcpu->arch.dscr_tm = set_reg_val(id, *val); | |
1423 | break; | |
1424 | case KVM_REG_PPC_TM_TAR: | |
1425 | vcpu->arch.tar_tm = set_reg_val(id, *val); | |
1426 | break; | |
1427 | #endif | |
388cc6e1 PM |
1428 | case KVM_REG_PPC_ARCH_COMPAT: |
1429 | r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val)); | |
1430 | break; | |
31f3438e | 1431 | default: |
a136a8bd | 1432 | r = -EINVAL; |
31f3438e PM |
1433 | break; |
1434 | } | |
1435 | ||
1436 | return r; | |
1437 | } | |
1438 | ||
de9bdd1a SS |
1439 | static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core) |
1440 | { | |
1441 | struct kvmppc_vcore *vcore; | |
1442 | ||
1443 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); | |
1444 | ||
1445 | if (vcore == NULL) | |
1446 | return NULL; | |
1447 | ||
1448 | INIT_LIST_HEAD(&vcore->runnable_threads); | |
1449 | spin_lock_init(&vcore->lock); | |
2711e248 | 1450 | spin_lock_init(&vcore->stoltb_lock); |
de9bdd1a SS |
1451 | init_waitqueue_head(&vcore->wq); |
1452 | vcore->preempt_tb = TB_NIL; | |
1453 | vcore->lpcr = kvm->arch.lpcr; | |
1454 | vcore->first_vcpuid = core * threads_per_subcore; | |
1455 | vcore->kvm = kvm; | |
ec257165 | 1456 | INIT_LIST_HEAD(&vcore->preempt_list); |
de9bdd1a | 1457 | |
9678cdaa SS |
1458 | vcore->mpp_buffer_is_valid = false; |
1459 | ||
1460 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
1461 | vcore->mpp_buffer = (void *)__get_free_pages( | |
1462 | GFP_KERNEL|__GFP_ZERO, | |
1463 | MPP_BUFFER_ORDER); | |
1464 | ||
de9bdd1a SS |
1465 | return vcore; |
1466 | } | |
1467 | ||
b6c295df PM |
1468 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
1469 | static struct debugfs_timings_element { | |
1470 | const char *name; | |
1471 | size_t offset; | |
1472 | } timings[] = { | |
1473 | {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)}, | |
1474 | {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)}, | |
1475 | {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)}, | |
1476 | {"guest", offsetof(struct kvm_vcpu, arch.guest_time)}, | |
1477 | {"cede", offsetof(struct kvm_vcpu, arch.cede_time)}, | |
1478 | }; | |
1479 | ||
1480 | #define N_TIMINGS (sizeof(timings) / sizeof(timings[0])) | |
1481 | ||
1482 | struct debugfs_timings_state { | |
1483 | struct kvm_vcpu *vcpu; | |
1484 | unsigned int buflen; | |
1485 | char buf[N_TIMINGS * 100]; | |
1486 | }; | |
1487 | ||
1488 | static int debugfs_timings_open(struct inode *inode, struct file *file) | |
1489 | { | |
1490 | struct kvm_vcpu *vcpu = inode->i_private; | |
1491 | struct debugfs_timings_state *p; | |
1492 | ||
1493 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
1494 | if (!p) | |
1495 | return -ENOMEM; | |
1496 | ||
1497 | kvm_get_kvm(vcpu->kvm); | |
1498 | p->vcpu = vcpu; | |
1499 | file->private_data = p; | |
1500 | ||
1501 | return nonseekable_open(inode, file); | |
1502 | } | |
1503 | ||
1504 | static int debugfs_timings_release(struct inode *inode, struct file *file) | |
1505 | { | |
1506 | struct debugfs_timings_state *p = file->private_data; | |
1507 | ||
1508 | kvm_put_kvm(p->vcpu->kvm); | |
1509 | kfree(p); | |
1510 | return 0; | |
1511 | } | |
1512 | ||
1513 | static ssize_t debugfs_timings_read(struct file *file, char __user *buf, | |
1514 | size_t len, loff_t *ppos) | |
1515 | { | |
1516 | struct debugfs_timings_state *p = file->private_data; | |
1517 | struct kvm_vcpu *vcpu = p->vcpu; | |
1518 | char *s, *buf_end; | |
1519 | struct kvmhv_tb_accumulator tb; | |
1520 | u64 count; | |
1521 | loff_t pos; | |
1522 | ssize_t n; | |
1523 | int i, loops; | |
1524 | bool ok; | |
1525 | ||
1526 | if (!p->buflen) { | |
1527 | s = p->buf; | |
1528 | buf_end = s + sizeof(p->buf); | |
1529 | for (i = 0; i < N_TIMINGS; ++i) { | |
1530 | struct kvmhv_tb_accumulator *acc; | |
1531 | ||
1532 | acc = (struct kvmhv_tb_accumulator *) | |
1533 | ((unsigned long)vcpu + timings[i].offset); | |
1534 | ok = false; | |
1535 | for (loops = 0; loops < 1000; ++loops) { | |
1536 | count = acc->seqcount; | |
1537 | if (!(count & 1)) { | |
1538 | smp_rmb(); | |
1539 | tb = *acc; | |
1540 | smp_rmb(); | |
1541 | if (count == acc->seqcount) { | |
1542 | ok = true; | |
1543 | break; | |
1544 | } | |
1545 | } | |
1546 | udelay(1); | |
1547 | } | |
1548 | if (!ok) | |
1549 | snprintf(s, buf_end - s, "%s: stuck\n", | |
1550 | timings[i].name); | |
1551 | else | |
1552 | snprintf(s, buf_end - s, | |
1553 | "%s: %llu %llu %llu %llu\n", | |
1554 | timings[i].name, count / 2, | |
1555 | tb_to_ns(tb.tb_total), | |
1556 | tb_to_ns(tb.tb_min), | |
1557 | tb_to_ns(tb.tb_max)); | |
1558 | s += strlen(s); | |
1559 | } | |
1560 | p->buflen = s - p->buf; | |
1561 | } | |
1562 | ||
1563 | pos = *ppos; | |
1564 | if (pos >= p->buflen) | |
1565 | return 0; | |
1566 | if (len > p->buflen - pos) | |
1567 | len = p->buflen - pos; | |
1568 | n = copy_to_user(buf, p->buf + pos, len); | |
1569 | if (n) { | |
1570 | if (n == len) | |
1571 | return -EFAULT; | |
1572 | len -= n; | |
1573 | } | |
1574 | *ppos = pos + len; | |
1575 | return len; | |
1576 | } | |
1577 | ||
1578 | static ssize_t debugfs_timings_write(struct file *file, const char __user *buf, | |
1579 | size_t len, loff_t *ppos) | |
1580 | { | |
1581 | return -EACCES; | |
1582 | } | |
1583 | ||
1584 | static const struct file_operations debugfs_timings_ops = { | |
1585 | .owner = THIS_MODULE, | |
1586 | .open = debugfs_timings_open, | |
1587 | .release = debugfs_timings_release, | |
1588 | .read = debugfs_timings_read, | |
1589 | .write = debugfs_timings_write, | |
1590 | .llseek = generic_file_llseek, | |
1591 | }; | |
1592 | ||
1593 | /* Create a debugfs directory for the vcpu */ | |
1594 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1595 | { | |
1596 | char buf[16]; | |
1597 | struct kvm *kvm = vcpu->kvm; | |
1598 | ||
1599 | snprintf(buf, sizeof(buf), "vcpu%u", id); | |
1600 | if (IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
1601 | return; | |
1602 | vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir); | |
1603 | if (IS_ERR_OR_NULL(vcpu->arch.debugfs_dir)) | |
1604 | return; | |
1605 | vcpu->arch.debugfs_timings = | |
1606 | debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir, | |
1607 | vcpu, &debugfs_timings_ops); | |
1608 | } | |
1609 | ||
1610 | #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1611 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1612 | { | |
1613 | } | |
1614 | #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1615 | ||
3a167bea AK |
1616 | static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm, |
1617 | unsigned int id) | |
de56a948 PM |
1618 | { |
1619 | struct kvm_vcpu *vcpu; | |
371fefd6 PM |
1620 | int err = -EINVAL; |
1621 | int core; | |
1622 | struct kvmppc_vcore *vcore; | |
de56a948 | 1623 | |
3102f784 | 1624 | core = id / threads_per_subcore; |
371fefd6 PM |
1625 | if (core >= KVM_MAX_VCORES) |
1626 | goto out; | |
1627 | ||
1628 | err = -ENOMEM; | |
6b75e6bf | 1629 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
de56a948 PM |
1630 | if (!vcpu) |
1631 | goto out; | |
1632 | ||
1633 | err = kvm_vcpu_init(vcpu, kvm, id); | |
1634 | if (err) | |
1635 | goto free_vcpu; | |
1636 | ||
1637 | vcpu->arch.shared = &vcpu->arch.shregs; | |
5deb8e7a AG |
1638 | #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE |
1639 | /* | |
1640 | * The shared struct is never shared on HV, | |
1641 | * so we can always use host endianness | |
1642 | */ | |
1643 | #ifdef __BIG_ENDIAN__ | |
1644 | vcpu->arch.shared_big_endian = true; | |
1645 | #else | |
1646 | vcpu->arch.shared_big_endian = false; | |
1647 | #endif | |
1648 | #endif | |
de56a948 PM |
1649 | vcpu->arch.mmcr[0] = MMCR0_FC; |
1650 | vcpu->arch.ctrl = CTRL_RUNLATCH; | |
1651 | /* default to host PVR, since we can't spoof it */ | |
3a167bea | 1652 | kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR)); |
2e25aa5f | 1653 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
c7b67670 PM |
1654 | spin_lock_init(&vcpu->arch.tbacct_lock); |
1655 | vcpu->arch.busy_preempt = TB_NIL; | |
d682916a | 1656 | vcpu->arch.intr_msr = MSR_SF | MSR_ME; |
de56a948 | 1657 | |
de56a948 PM |
1658 | kvmppc_mmu_book3s_hv_init(vcpu); |
1659 | ||
8455d79e | 1660 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
371fefd6 PM |
1661 | |
1662 | init_waitqueue_head(&vcpu->arch.cpu_run); | |
1663 | ||
1664 | mutex_lock(&kvm->lock); | |
1665 | vcore = kvm->arch.vcores[core]; | |
1666 | if (!vcore) { | |
de9bdd1a | 1667 | vcore = kvmppc_vcore_create(kvm, core); |
371fefd6 | 1668 | kvm->arch.vcores[core] = vcore; |
1b400ba0 | 1669 | kvm->arch.online_vcores++; |
371fefd6 PM |
1670 | } |
1671 | mutex_unlock(&kvm->lock); | |
1672 | ||
1673 | if (!vcore) | |
1674 | goto free_vcpu; | |
1675 | ||
1676 | spin_lock(&vcore->lock); | |
1677 | ++vcore->num_threads; | |
371fefd6 PM |
1678 | spin_unlock(&vcore->lock); |
1679 | vcpu->arch.vcore = vcore; | |
e0b7ec05 | 1680 | vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid; |
ec257165 | 1681 | vcpu->arch.thread_cpu = -1; |
371fefd6 | 1682 | |
af8f38b3 AG |
1683 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
1684 | kvmppc_sanity_check(vcpu); | |
1685 | ||
b6c295df PM |
1686 | debugfs_vcpu_init(vcpu, id); |
1687 | ||
de56a948 PM |
1688 | return vcpu; |
1689 | ||
1690 | free_vcpu: | |
6b75e6bf | 1691 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1692 | out: |
1693 | return ERR_PTR(err); | |
1694 | } | |
1695 | ||
c35635ef PM |
1696 | static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) |
1697 | { | |
1698 | if (vpa->pinned_addr) | |
1699 | kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa, | |
1700 | vpa->dirty); | |
1701 | } | |
1702 | ||
3a167bea | 1703 | static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) |
de56a948 | 1704 | { |
2e25aa5f | 1705 | spin_lock(&vcpu->arch.vpa_update_lock); |
c35635ef PM |
1706 | unpin_vpa(vcpu->kvm, &vcpu->arch.dtl); |
1707 | unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow); | |
1708 | unpin_vpa(vcpu->kvm, &vcpu->arch.vpa); | |
2e25aa5f | 1709 | spin_unlock(&vcpu->arch.vpa_update_lock); |
de56a948 | 1710 | kvm_vcpu_uninit(vcpu); |
6b75e6bf | 1711 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1712 | } |
1713 | ||
3a167bea AK |
1714 | static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu) |
1715 | { | |
1716 | /* Indicate we want to get back into the guest */ | |
1717 | return 1; | |
1718 | } | |
1719 | ||
19ccb76a | 1720 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
371fefd6 | 1721 | { |
19ccb76a | 1722 | unsigned long dec_nsec, now; |
371fefd6 | 1723 | |
19ccb76a PM |
1724 | now = get_tb(); |
1725 | if (now > vcpu->arch.dec_expires) { | |
1726 | /* decrementer has already gone negative */ | |
1727 | kvmppc_core_queue_dec(vcpu); | |
7e28e60e | 1728 | kvmppc_core_prepare_to_enter(vcpu); |
19ccb76a | 1729 | return; |
371fefd6 | 1730 | } |
19ccb76a PM |
1731 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
1732 | / tb_ticks_per_sec; | |
1733 | hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec), | |
1734 | HRTIMER_MODE_REL); | |
1735 | vcpu->arch.timer_running = 1; | |
371fefd6 PM |
1736 | } |
1737 | ||
19ccb76a | 1738 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
371fefd6 | 1739 | { |
19ccb76a PM |
1740 | vcpu->arch.ceded = 0; |
1741 | if (vcpu->arch.timer_running) { | |
1742 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1743 | vcpu->arch.timer_running = 0; | |
1744 | } | |
371fefd6 PM |
1745 | } |
1746 | ||
e0b7ec05 | 1747 | extern void __kvmppc_vcore_entry(void); |
de56a948 | 1748 | |
371fefd6 PM |
1749 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
1750 | struct kvm_vcpu *vcpu) | |
de56a948 | 1751 | { |
c7b67670 PM |
1752 | u64 now; |
1753 | ||
371fefd6 PM |
1754 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
1755 | return; | |
bf3d32e1 | 1756 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
1757 | now = mftb(); |
1758 | vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - | |
1759 | vcpu->arch.stolen_logged; | |
1760 | vcpu->arch.busy_preempt = now; | |
1761 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; | |
bf3d32e1 | 1762 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
371fefd6 | 1763 | --vc->n_runnable; |
371fefd6 PM |
1764 | list_del(&vcpu->arch.run_list); |
1765 | } | |
1766 | ||
f0888f70 PM |
1767 | static int kvmppc_grab_hwthread(int cpu) |
1768 | { | |
1769 | struct paca_struct *tpaca; | |
b754c739 | 1770 | long timeout = 10000; |
f0888f70 PM |
1771 | |
1772 | tpaca = &paca[cpu]; | |
1773 | ||
1774 | /* Ensure the thread won't go into the kernel if it wakes */ | |
7b444c67 | 1775 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
b4deba5c | 1776 | tpaca->kvm_hstate.kvm_vcore = NULL; |
5d5b99cd PM |
1777 | tpaca->kvm_hstate.napping = 0; |
1778 | smp_wmb(); | |
1779 | tpaca->kvm_hstate.hwthread_req = 1; | |
f0888f70 PM |
1780 | |
1781 | /* | |
1782 | * If the thread is already executing in the kernel (e.g. handling | |
1783 | * a stray interrupt), wait for it to get back to nap mode. | |
1784 | * The smp_mb() is to ensure that our setting of hwthread_req | |
1785 | * is visible before we look at hwthread_state, so if this | |
1786 | * races with the code at system_reset_pSeries and the thread | |
1787 | * misses our setting of hwthread_req, we are sure to see its | |
1788 | * setting of hwthread_state, and vice versa. | |
1789 | */ | |
1790 | smp_mb(); | |
1791 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { | |
1792 | if (--timeout <= 0) { | |
1793 | pr_err("KVM: couldn't grab cpu %d\n", cpu); | |
1794 | return -EBUSY; | |
1795 | } | |
1796 | udelay(1); | |
1797 | } | |
1798 | return 0; | |
1799 | } | |
1800 | ||
1801 | static void kvmppc_release_hwthread(int cpu) | |
1802 | { | |
1803 | struct paca_struct *tpaca; | |
1804 | ||
1805 | tpaca = &paca[cpu]; | |
1806 | tpaca->kvm_hstate.hwthread_req = 0; | |
1807 | tpaca->kvm_hstate.kvm_vcpu = NULL; | |
b4deba5c PM |
1808 | tpaca->kvm_hstate.kvm_vcore = NULL; |
1809 | tpaca->kvm_hstate.kvm_split_mode = NULL; | |
f0888f70 PM |
1810 | } |
1811 | ||
b4deba5c | 1812 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc) |
371fefd6 PM |
1813 | { |
1814 | int cpu; | |
1815 | struct paca_struct *tpaca; | |
ec257165 | 1816 | struct kvmppc_vcore *mvc = vc->master_vcore; |
371fefd6 | 1817 | |
b4deba5c PM |
1818 | cpu = vc->pcpu; |
1819 | if (vcpu) { | |
1820 | if (vcpu->arch.timer_running) { | |
1821 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1822 | vcpu->arch.timer_running = 0; | |
1823 | } | |
1824 | cpu += vcpu->arch.ptid; | |
1825 | vcpu->cpu = mvc->pcpu; | |
1826 | vcpu->arch.thread_cpu = cpu; | |
19ccb76a | 1827 | } |
371fefd6 | 1828 | tpaca = &paca[cpu]; |
5d5b99cd | 1829 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
ec257165 | 1830 | tpaca->kvm_hstate.ptid = cpu - mvc->pcpu; |
ec257165 | 1831 | /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */ |
371fefd6 | 1832 | smp_wmb(); |
b4deba5c | 1833 | tpaca->kvm_hstate.kvm_vcore = mvc; |
5d5b99cd | 1834 | if (cpu != smp_processor_id()) |
66feed61 | 1835 | kvmppc_ipi_thread(cpu); |
371fefd6 | 1836 | } |
de56a948 | 1837 | |
5d5b99cd | 1838 | static void kvmppc_wait_for_nap(void) |
371fefd6 | 1839 | { |
5d5b99cd PM |
1840 | int cpu = smp_processor_id(); |
1841 | int i, loops; | |
371fefd6 | 1842 | |
5d5b99cd PM |
1843 | for (loops = 0; loops < 1000000; ++loops) { |
1844 | /* | |
1845 | * Check if all threads are finished. | |
b4deba5c | 1846 | * We set the vcore pointer when starting a thread |
5d5b99cd | 1847 | * and the thread clears it when finished, so we look |
b4deba5c | 1848 | * for any threads that still have a non-NULL vcore ptr. |
5d5b99cd PM |
1849 | */ |
1850 | for (i = 1; i < threads_per_subcore; ++i) | |
b4deba5c | 1851 | if (paca[cpu + i].kvm_hstate.kvm_vcore) |
5d5b99cd PM |
1852 | break; |
1853 | if (i == threads_per_subcore) { | |
1854 | HMT_medium(); | |
1855 | return; | |
371fefd6 | 1856 | } |
5d5b99cd | 1857 | HMT_low(); |
371fefd6 PM |
1858 | } |
1859 | HMT_medium(); | |
5d5b99cd | 1860 | for (i = 1; i < threads_per_subcore; ++i) |
b4deba5c | 1861 | if (paca[cpu + i].kvm_hstate.kvm_vcore) |
5d5b99cd | 1862 | pr_err("KVM: CPU %d seems to be stuck\n", cpu + i); |
371fefd6 PM |
1863 | } |
1864 | ||
1865 | /* | |
1866 | * Check that we are on thread 0 and that any other threads in | |
7b444c67 PM |
1867 | * this core are off-line. Then grab the threads so they can't |
1868 | * enter the kernel. | |
371fefd6 PM |
1869 | */ |
1870 | static int on_primary_thread(void) | |
1871 | { | |
1872 | int cpu = smp_processor_id(); | |
3102f784 | 1873 | int thr; |
371fefd6 | 1874 | |
3102f784 ME |
1875 | /* Are we on a primary subcore? */ |
1876 | if (cpu_thread_in_subcore(cpu)) | |
371fefd6 | 1877 | return 0; |
3102f784 ME |
1878 | |
1879 | thr = 0; | |
1880 | while (++thr < threads_per_subcore) | |
371fefd6 PM |
1881 | if (cpu_online(cpu + thr)) |
1882 | return 0; | |
7b444c67 PM |
1883 | |
1884 | /* Grab all hw threads so they can't go into the kernel */ | |
3102f784 | 1885 | for (thr = 1; thr < threads_per_subcore; ++thr) { |
7b444c67 PM |
1886 | if (kvmppc_grab_hwthread(cpu + thr)) { |
1887 | /* Couldn't grab one; let the others go */ | |
1888 | do { | |
1889 | kvmppc_release_hwthread(cpu + thr); | |
1890 | } while (--thr > 0); | |
1891 | return 0; | |
1892 | } | |
1893 | } | |
371fefd6 PM |
1894 | return 1; |
1895 | } | |
1896 | ||
9678cdaa SS |
1897 | static void kvmppc_start_saving_l2_cache(struct kvmppc_vcore *vc) |
1898 | { | |
1899 | phys_addr_t phy_addr, mpp_addr; | |
1900 | ||
1901 | phy_addr = (phys_addr_t)virt_to_phys(vc->mpp_buffer); | |
1902 | mpp_addr = phy_addr & PPC_MPPE_ADDRESS_MASK; | |
1903 | ||
1904 | mtspr(SPRN_MPPR, mpp_addr | PPC_MPPR_FETCH_ABORT); | |
1905 | logmpp(mpp_addr | PPC_LOGMPP_LOG_L2); | |
1906 | ||
1907 | vc->mpp_buffer_is_valid = true; | |
1908 | } | |
1909 | ||
1910 | static void kvmppc_start_restoring_l2_cache(const struct kvmppc_vcore *vc) | |
1911 | { | |
1912 | phys_addr_t phy_addr, mpp_addr; | |
1913 | ||
1914 | phy_addr = virt_to_phys(vc->mpp_buffer); | |
1915 | mpp_addr = phy_addr & PPC_MPPE_ADDRESS_MASK; | |
1916 | ||
1917 | /* We must abort any in-progress save operations to ensure | |
1918 | * the table is valid so that prefetch engine knows when to | |
1919 | * stop prefetching. */ | |
1920 | logmpp(mpp_addr | PPC_LOGMPP_LOG_ABORT); | |
1921 | mtspr(SPRN_MPPR, mpp_addr | PPC_MPPR_FETCH_WHOLE_TABLE); | |
1922 | } | |
1923 | ||
ec257165 PM |
1924 | /* |
1925 | * A list of virtual cores for each physical CPU. | |
1926 | * These are vcores that could run but their runner VCPU tasks are | |
1927 | * (or may be) preempted. | |
1928 | */ | |
1929 | struct preempted_vcore_list { | |
1930 | struct list_head list; | |
1931 | spinlock_t lock; | |
1932 | }; | |
1933 | ||
1934 | static DEFINE_PER_CPU(struct preempted_vcore_list, preempted_vcores); | |
1935 | ||
1936 | static void init_vcore_lists(void) | |
1937 | { | |
1938 | int cpu; | |
1939 | ||
1940 | for_each_possible_cpu(cpu) { | |
1941 | struct preempted_vcore_list *lp = &per_cpu(preempted_vcores, cpu); | |
1942 | spin_lock_init(&lp->lock); | |
1943 | INIT_LIST_HEAD(&lp->list); | |
1944 | } | |
1945 | } | |
1946 | ||
1947 | static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc) | |
1948 | { | |
1949 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); | |
1950 | ||
1951 | vc->vcore_state = VCORE_PREEMPT; | |
1952 | vc->pcpu = smp_processor_id(); | |
1953 | if (vc->num_threads < threads_per_subcore) { | |
1954 | spin_lock(&lp->lock); | |
1955 | list_add_tail(&vc->preempt_list, &lp->list); | |
1956 | spin_unlock(&lp->lock); | |
1957 | } | |
1958 | ||
1959 | /* Start accumulating stolen time */ | |
1960 | kvmppc_core_start_stolen(vc); | |
1961 | } | |
1962 | ||
1963 | static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc) | |
1964 | { | |
402813fe | 1965 | struct preempted_vcore_list *lp; |
ec257165 PM |
1966 | |
1967 | kvmppc_core_end_stolen(vc); | |
1968 | if (!list_empty(&vc->preempt_list)) { | |
402813fe | 1969 | lp = &per_cpu(preempted_vcores, vc->pcpu); |
ec257165 PM |
1970 | spin_lock(&lp->lock); |
1971 | list_del_init(&vc->preempt_list); | |
1972 | spin_unlock(&lp->lock); | |
1973 | } | |
1974 | vc->vcore_state = VCORE_INACTIVE; | |
1975 | } | |
1976 | ||
b4deba5c PM |
1977 | /* |
1978 | * This stores information about the virtual cores currently | |
1979 | * assigned to a physical core. | |
1980 | */ | |
ec257165 | 1981 | struct core_info { |
b4deba5c PM |
1982 | int n_subcores; |
1983 | int max_subcore_threads; | |
ec257165 | 1984 | int total_threads; |
b4deba5c PM |
1985 | int subcore_threads[MAX_SUBCORES]; |
1986 | struct kvm *subcore_vm[MAX_SUBCORES]; | |
1987 | struct list_head vcs[MAX_SUBCORES]; | |
ec257165 PM |
1988 | }; |
1989 | ||
b4deba5c PM |
1990 | /* |
1991 | * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7 | |
1992 | * respectively in 2-way micro-threading (split-core) mode. | |
1993 | */ | |
1994 | static int subcore_thread_map[MAX_SUBCORES] = { 0, 4, 2, 6 }; | |
1995 | ||
ec257165 PM |
1996 | static void init_core_info(struct core_info *cip, struct kvmppc_vcore *vc) |
1997 | { | |
b4deba5c PM |
1998 | int sub; |
1999 | ||
ec257165 | 2000 | memset(cip, 0, sizeof(*cip)); |
b4deba5c PM |
2001 | cip->n_subcores = 1; |
2002 | cip->max_subcore_threads = vc->num_threads; | |
ec257165 | 2003 | cip->total_threads = vc->num_threads; |
b4deba5c PM |
2004 | cip->subcore_threads[0] = vc->num_threads; |
2005 | cip->subcore_vm[0] = vc->kvm; | |
2006 | for (sub = 0; sub < MAX_SUBCORES; ++sub) | |
2007 | INIT_LIST_HEAD(&cip->vcs[sub]); | |
2008 | list_add_tail(&vc->preempt_list, &cip->vcs[0]); | |
2009 | } | |
2010 | ||
2011 | static bool subcore_config_ok(int n_subcores, int n_threads) | |
2012 | { | |
2013 | /* Can only dynamically split if unsplit to begin with */ | |
2014 | if (n_subcores > 1 && threads_per_subcore < MAX_SMT_THREADS) | |
2015 | return false; | |
2016 | if (n_subcores > MAX_SUBCORES) | |
2017 | return false; | |
2018 | if (n_subcores > 1) { | |
2019 | if (!(dynamic_mt_modes & 2)) | |
2020 | n_subcores = 4; | |
2021 | if (n_subcores > 2 && !(dynamic_mt_modes & 4)) | |
2022 | return false; | |
2023 | } | |
2024 | ||
2025 | return n_subcores * roundup_pow_of_two(n_threads) <= MAX_SMT_THREADS; | |
ec257165 PM |
2026 | } |
2027 | ||
2028 | static void init_master_vcore(struct kvmppc_vcore *vc) | |
2029 | { | |
2030 | vc->master_vcore = vc; | |
2031 | vc->entry_exit_map = 0; | |
2032 | vc->in_guest = 0; | |
2033 | vc->napping_threads = 0; | |
2034 | vc->conferring_threads = 0; | |
2035 | } | |
2036 | ||
2037 | /* | |
b4deba5c PM |
2038 | * See if the existing subcores can be split into 3 (or fewer) subcores |
2039 | * of at most two threads each, so we can fit in another vcore. This | |
2040 | * assumes there are at most two subcores and at most 6 threads in total. | |
ec257165 | 2041 | */ |
b4deba5c PM |
2042 | static bool can_split_piggybacked_subcores(struct core_info *cip) |
2043 | { | |
2044 | int sub, new_sub; | |
2045 | int large_sub = -1; | |
2046 | int thr; | |
2047 | int n_subcores = cip->n_subcores; | |
2048 | struct kvmppc_vcore *vc, *vcnext; | |
2049 | struct kvmppc_vcore *master_vc = NULL; | |
2050 | ||
2051 | for (sub = 0; sub < cip->n_subcores; ++sub) { | |
2052 | if (cip->subcore_threads[sub] <= 2) | |
2053 | continue; | |
2054 | if (large_sub >= 0) | |
2055 | return false; | |
2056 | large_sub = sub; | |
2057 | vc = list_first_entry(&cip->vcs[sub], struct kvmppc_vcore, | |
2058 | preempt_list); | |
2059 | if (vc->num_threads > 2) | |
2060 | return false; | |
2061 | n_subcores += (cip->subcore_threads[sub] - 1) >> 1; | |
2062 | } | |
2063 | if (n_subcores > 3 || large_sub < 0) | |
2064 | return false; | |
2065 | ||
2066 | /* | |
2067 | * Seems feasible, so go through and move vcores to new subcores. | |
2068 | * Note that when we have two or more vcores in one subcore, | |
2069 | * all those vcores must have only one thread each. | |
2070 | */ | |
2071 | new_sub = cip->n_subcores; | |
2072 | thr = 0; | |
2073 | sub = large_sub; | |
2074 | list_for_each_entry_safe(vc, vcnext, &cip->vcs[sub], preempt_list) { | |
2075 | if (thr >= 2) { | |
2076 | list_del(&vc->preempt_list); | |
2077 | list_add_tail(&vc->preempt_list, &cip->vcs[new_sub]); | |
2078 | /* vc->num_threads must be 1 */ | |
2079 | if (++cip->subcore_threads[new_sub] == 1) { | |
2080 | cip->subcore_vm[new_sub] = vc->kvm; | |
2081 | init_master_vcore(vc); | |
2082 | master_vc = vc; | |
2083 | ++cip->n_subcores; | |
2084 | } else { | |
2085 | vc->master_vcore = master_vc; | |
2086 | ++new_sub; | |
2087 | } | |
2088 | } | |
2089 | thr += vc->num_threads; | |
2090 | } | |
2091 | cip->subcore_threads[large_sub] = 2; | |
2092 | cip->max_subcore_threads = 2; | |
2093 | ||
2094 | return true; | |
2095 | } | |
2096 | ||
2097 | static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip) | |
2098 | { | |
2099 | int n_threads = vc->num_threads; | |
2100 | int sub; | |
2101 | ||
2102 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
2103 | return false; | |
2104 | ||
2105 | if (n_threads < cip->max_subcore_threads) | |
2106 | n_threads = cip->max_subcore_threads; | |
2107 | if (subcore_config_ok(cip->n_subcores + 1, n_threads)) { | |
2108 | cip->max_subcore_threads = n_threads; | |
2109 | } else if (cip->n_subcores <= 2 && cip->total_threads <= 6 && | |
2110 | vc->num_threads <= 2) { | |
2111 | /* | |
2112 | * We may be able to fit another subcore in by | |
2113 | * splitting an existing subcore with 3 or 4 | |
2114 | * threads into two 2-thread subcores, or one | |
2115 | * with 5 or 6 threads into three subcores. | |
2116 | * We can only do this if those subcores have | |
2117 | * piggybacked virtual cores. | |
2118 | */ | |
2119 | if (!can_split_piggybacked_subcores(cip)) | |
2120 | return false; | |
2121 | } else { | |
2122 | return false; | |
2123 | } | |
2124 | ||
2125 | sub = cip->n_subcores; | |
2126 | ++cip->n_subcores; | |
2127 | cip->total_threads += vc->num_threads; | |
2128 | cip->subcore_threads[sub] = vc->num_threads; | |
2129 | cip->subcore_vm[sub] = vc->kvm; | |
2130 | init_master_vcore(vc); | |
2131 | list_del(&vc->preempt_list); | |
2132 | list_add_tail(&vc->preempt_list, &cip->vcs[sub]); | |
2133 | ||
2134 | return true; | |
2135 | } | |
2136 | ||
2137 | static bool can_piggyback_subcore(struct kvmppc_vcore *pvc, | |
2138 | struct core_info *cip, int sub) | |
ec257165 PM |
2139 | { |
2140 | struct kvmppc_vcore *vc; | |
b4deba5c | 2141 | int n_thr; |
ec257165 | 2142 | |
b4deba5c PM |
2143 | vc = list_first_entry(&cip->vcs[sub], struct kvmppc_vcore, |
2144 | preempt_list); | |
ec257165 PM |
2145 | |
2146 | /* require same VM and same per-core reg values */ | |
2147 | if (pvc->kvm != vc->kvm || | |
2148 | pvc->tb_offset != vc->tb_offset || | |
2149 | pvc->pcr != vc->pcr || | |
2150 | pvc->lpcr != vc->lpcr) | |
2151 | return false; | |
2152 | ||
2153 | /* P8 guest with > 1 thread per core would see wrong TIR value */ | |
2154 | if (cpu_has_feature(CPU_FTR_ARCH_207S) && | |
2155 | (vc->num_threads > 1 || pvc->num_threads > 1)) | |
2156 | return false; | |
2157 | ||
b4deba5c PM |
2158 | n_thr = cip->subcore_threads[sub] + pvc->num_threads; |
2159 | if (n_thr > cip->max_subcore_threads) { | |
2160 | if (!subcore_config_ok(cip->n_subcores, n_thr)) | |
2161 | return false; | |
2162 | cip->max_subcore_threads = n_thr; | |
2163 | } | |
ec257165 PM |
2164 | |
2165 | cip->total_threads += pvc->num_threads; | |
b4deba5c | 2166 | cip->subcore_threads[sub] = n_thr; |
ec257165 PM |
2167 | pvc->master_vcore = vc; |
2168 | list_del(&pvc->preempt_list); | |
b4deba5c | 2169 | list_add_tail(&pvc->preempt_list, &cip->vcs[sub]); |
ec257165 PM |
2170 | |
2171 | return true; | |
2172 | } | |
2173 | ||
b4deba5c PM |
2174 | /* |
2175 | * Work out whether it is possible to piggyback the execution of | |
2176 | * vcore *pvc onto the execution of the other vcores described in *cip. | |
2177 | */ | |
2178 | static bool can_piggyback(struct kvmppc_vcore *pvc, struct core_info *cip, | |
2179 | int target_threads) | |
2180 | { | |
2181 | int sub; | |
2182 | ||
2183 | if (cip->total_threads + pvc->num_threads > target_threads) | |
2184 | return false; | |
2185 | for (sub = 0; sub < cip->n_subcores; ++sub) | |
2186 | if (cip->subcore_threads[sub] && | |
2187 | can_piggyback_subcore(pvc, cip, sub)) | |
2188 | return true; | |
2189 | ||
2190 | if (can_dynamic_split(pvc, cip)) | |
2191 | return true; | |
2192 | ||
2193 | return false; | |
2194 | } | |
2195 | ||
d911f0be PM |
2196 | static void prepare_threads(struct kvmppc_vcore *vc) |
2197 | { | |
2198 | struct kvm_vcpu *vcpu, *vnext; | |
2199 | ||
2200 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, | |
2201 | arch.run_list) { | |
2202 | if (signal_pending(vcpu->arch.run_task)) | |
2203 | vcpu->arch.ret = -EINTR; | |
2204 | else if (vcpu->arch.vpa.update_pending || | |
2205 | vcpu->arch.slb_shadow.update_pending || | |
2206 | vcpu->arch.dtl.update_pending) | |
2207 | vcpu->arch.ret = RESUME_GUEST; | |
2208 | else | |
2209 | continue; | |
2210 | kvmppc_remove_runnable(vc, vcpu); | |
2211 | wake_up(&vcpu->arch.cpu_run); | |
2212 | } | |
2213 | } | |
2214 | ||
ec257165 PM |
2215 | static void collect_piggybacks(struct core_info *cip, int target_threads) |
2216 | { | |
2217 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); | |
2218 | struct kvmppc_vcore *pvc, *vcnext; | |
2219 | ||
2220 | spin_lock(&lp->lock); | |
2221 | list_for_each_entry_safe(pvc, vcnext, &lp->list, preempt_list) { | |
2222 | if (!spin_trylock(&pvc->lock)) | |
2223 | continue; | |
2224 | prepare_threads(pvc); | |
2225 | if (!pvc->n_runnable) { | |
2226 | list_del_init(&pvc->preempt_list); | |
2227 | if (pvc->runner == NULL) { | |
2228 | pvc->vcore_state = VCORE_INACTIVE; | |
2229 | kvmppc_core_end_stolen(pvc); | |
2230 | } | |
2231 | spin_unlock(&pvc->lock); | |
2232 | continue; | |
2233 | } | |
2234 | if (!can_piggyback(pvc, cip, target_threads)) { | |
2235 | spin_unlock(&pvc->lock); | |
2236 | continue; | |
2237 | } | |
2238 | kvmppc_core_end_stolen(pvc); | |
2239 | pvc->vcore_state = VCORE_PIGGYBACK; | |
2240 | if (cip->total_threads >= target_threads) | |
2241 | break; | |
2242 | } | |
2243 | spin_unlock(&lp->lock); | |
2244 | } | |
2245 | ||
2246 | static void post_guest_process(struct kvmppc_vcore *vc, bool is_master) | |
25fedfca | 2247 | { |
ec257165 | 2248 | int still_running = 0; |
25fedfca PM |
2249 | u64 now; |
2250 | long ret; | |
2251 | struct kvm_vcpu *vcpu, *vnext; | |
2252 | ||
ec257165 | 2253 | spin_lock(&vc->lock); |
25fedfca PM |
2254 | now = get_tb(); |
2255 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, | |
2256 | arch.run_list) { | |
2257 | /* cancel pending dec exception if dec is positive */ | |
2258 | if (now < vcpu->arch.dec_expires && | |
2259 | kvmppc_core_pending_dec(vcpu)) | |
2260 | kvmppc_core_dequeue_dec(vcpu); | |
2261 | ||
2262 | trace_kvm_guest_exit(vcpu); | |
2263 | ||
2264 | ret = RESUME_GUEST; | |
2265 | if (vcpu->arch.trap) | |
2266 | ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu, | |
2267 | vcpu->arch.run_task); | |
2268 | ||
2269 | vcpu->arch.ret = ret; | |
2270 | vcpu->arch.trap = 0; | |
2271 | ||
ec257165 PM |
2272 | if (is_kvmppc_resume_guest(vcpu->arch.ret)) { |
2273 | if (vcpu->arch.pending_exceptions) | |
2274 | kvmppc_core_prepare_to_enter(vcpu); | |
2275 | if (vcpu->arch.ceded) | |
25fedfca | 2276 | kvmppc_set_timer(vcpu); |
ec257165 PM |
2277 | else |
2278 | ++still_running; | |
2279 | } else { | |
25fedfca PM |
2280 | kvmppc_remove_runnable(vc, vcpu); |
2281 | wake_up(&vcpu->arch.cpu_run); | |
2282 | } | |
2283 | } | |
ec257165 PM |
2284 | list_del_init(&vc->preempt_list); |
2285 | if (!is_master) { | |
563a1e93 | 2286 | if (still_running > 0) { |
ec257165 | 2287 | kvmppc_vcore_preempt(vc); |
563a1e93 PM |
2288 | } else if (vc->runner) { |
2289 | vc->vcore_state = VCORE_PREEMPT; | |
2290 | kvmppc_core_start_stolen(vc); | |
2291 | } else { | |
2292 | vc->vcore_state = VCORE_INACTIVE; | |
2293 | } | |
ec257165 PM |
2294 | if (vc->n_runnable > 0 && vc->runner == NULL) { |
2295 | /* make sure there's a candidate runner awake */ | |
2296 | vcpu = list_first_entry(&vc->runnable_threads, | |
2297 | struct kvm_vcpu, arch.run_list); | |
2298 | wake_up(&vcpu->arch.cpu_run); | |
2299 | } | |
2300 | } | |
2301 | spin_unlock(&vc->lock); | |
25fedfca PM |
2302 | } |
2303 | ||
371fefd6 PM |
2304 | /* |
2305 | * Run a set of guest threads on a physical core. | |
2306 | * Called with vc->lock held. | |
2307 | */ | |
66feed61 | 2308 | static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) |
371fefd6 | 2309 | { |
17d48901 | 2310 | struct kvm_vcpu *vcpu, *vnext; |
d911f0be | 2311 | int i; |
2c9097e4 | 2312 | int srcu_idx; |
ec257165 PM |
2313 | struct core_info core_info; |
2314 | struct kvmppc_vcore *pvc, *vcnext; | |
b4deba5c PM |
2315 | struct kvm_split_mode split_info, *sip; |
2316 | int split, subcore_size, active; | |
2317 | int sub; | |
2318 | bool thr0_done; | |
2319 | unsigned long cmd_bit, stat_bit; | |
ec257165 PM |
2320 | int pcpu, thr; |
2321 | int target_threads; | |
371fefd6 | 2322 | |
d911f0be PM |
2323 | /* |
2324 | * Remove from the list any threads that have a signal pending | |
2325 | * or need a VPA update done | |
2326 | */ | |
2327 | prepare_threads(vc); | |
2328 | ||
2329 | /* if the runner is no longer runnable, let the caller pick a new one */ | |
2330 | if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE) | |
2331 | return; | |
081f323b PM |
2332 | |
2333 | /* | |
d911f0be | 2334 | * Initialize *vc. |
081f323b | 2335 | */ |
ec257165 | 2336 | init_master_vcore(vc); |
2711e248 | 2337 | vc->preempt_tb = TB_NIL; |
081f323b | 2338 | |
7b444c67 | 2339 | /* |
3102f784 ME |
2340 | * Make sure we are running on primary threads, and that secondary |
2341 | * threads are offline. Also check if the number of threads in this | |
2342 | * guest are greater than the current system threads per guest. | |
7b444c67 | 2343 | */ |
3102f784 ME |
2344 | if ((threads_per_core > 1) && |
2345 | ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) { | |
17d48901 PM |
2346 | list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads, |
2347 | arch.run_list) { | |
7b444c67 | 2348 | vcpu->arch.ret = -EBUSY; |
25fedfca PM |
2349 | kvmppc_remove_runnable(vc, vcpu); |
2350 | wake_up(&vcpu->arch.cpu_run); | |
2351 | } | |
7b444c67 PM |
2352 | goto out; |
2353 | } | |
2354 | ||
ec257165 PM |
2355 | /* |
2356 | * See if we could run any other vcores on the physical core | |
2357 | * along with this one. | |
2358 | */ | |
2359 | init_core_info(&core_info, vc); | |
2360 | pcpu = smp_processor_id(); | |
2361 | target_threads = threads_per_subcore; | |
2362 | if (target_smt_mode && target_smt_mode < target_threads) | |
2363 | target_threads = target_smt_mode; | |
2364 | if (vc->num_threads < target_threads) | |
2365 | collect_piggybacks(&core_info, target_threads); | |
3102f784 | 2366 | |
b4deba5c PM |
2367 | /* Decide on micro-threading (split-core) mode */ |
2368 | subcore_size = threads_per_subcore; | |
2369 | cmd_bit = stat_bit = 0; | |
2370 | split = core_info.n_subcores; | |
2371 | sip = NULL; | |
2372 | if (split > 1) { | |
2373 | /* threads_per_subcore must be MAX_SMT_THREADS (8) here */ | |
2374 | if (split == 2 && (dynamic_mt_modes & 2)) { | |
2375 | cmd_bit = HID0_POWER8_1TO2LPAR; | |
2376 | stat_bit = HID0_POWER8_2LPARMODE; | |
2377 | } else { | |
2378 | split = 4; | |
2379 | cmd_bit = HID0_POWER8_1TO4LPAR; | |
2380 | stat_bit = HID0_POWER8_4LPARMODE; | |
2381 | } | |
2382 | subcore_size = MAX_SMT_THREADS / split; | |
2383 | sip = &split_info; | |
2384 | memset(&split_info, 0, sizeof(split_info)); | |
2385 | split_info.rpr = mfspr(SPRN_RPR); | |
2386 | split_info.pmmar = mfspr(SPRN_PMMAR); | |
2387 | split_info.ldbar = mfspr(SPRN_LDBAR); | |
2388 | split_info.subcore_size = subcore_size; | |
2389 | for (sub = 0; sub < core_info.n_subcores; ++sub) | |
2390 | split_info.master_vcs[sub] = | |
2391 | list_first_entry(&core_info.vcs[sub], | |
2392 | struct kvmppc_vcore, preempt_list); | |
2393 | /* order writes to split_info before kvm_split_mode pointer */ | |
2394 | smp_wmb(); | |
2395 | } | |
2396 | pcpu = smp_processor_id(); | |
2397 | for (thr = 0; thr < threads_per_subcore; ++thr) | |
2398 | paca[pcpu + thr].kvm_hstate.kvm_split_mode = sip; | |
2399 | ||
2400 | /* Initiate micro-threading (split-core) if required */ | |
2401 | if (cmd_bit) { | |
2402 | unsigned long hid0 = mfspr(SPRN_HID0); | |
2403 | ||
2404 | hid0 |= cmd_bit | HID0_POWER8_DYNLPARDIS; | |
2405 | mb(); | |
2406 | mtspr(SPRN_HID0, hid0); | |
2407 | isync(); | |
2408 | for (;;) { | |
2409 | hid0 = mfspr(SPRN_HID0); | |
2410 | if (hid0 & stat_bit) | |
2411 | break; | |
2412 | cpu_relax(); | |
ec257165 | 2413 | } |
2e25aa5f | 2414 | } |
3102f784 | 2415 | |
b4deba5c PM |
2416 | /* Start all the threads */ |
2417 | active = 0; | |
2418 | for (sub = 0; sub < core_info.n_subcores; ++sub) { | |
2419 | thr = subcore_thread_map[sub]; | |
2420 | thr0_done = false; | |
2421 | active |= 1 << thr; | |
2422 | list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) { | |
2423 | pvc->pcpu = pcpu + thr; | |
2424 | list_for_each_entry(vcpu, &pvc->runnable_threads, | |
2425 | arch.run_list) { | |
2426 | kvmppc_start_thread(vcpu, pvc); | |
2427 | kvmppc_create_dtl_entry(vcpu, pvc); | |
2428 | trace_kvm_guest_enter(vcpu); | |
2429 | if (!vcpu->arch.ptid) | |
2430 | thr0_done = true; | |
2431 | active |= 1 << (thr + vcpu->arch.ptid); | |
2432 | } | |
2433 | /* | |
2434 | * We need to start the first thread of each subcore | |
2435 | * even if it doesn't have a vcpu. | |
2436 | */ | |
2437 | if (pvc->master_vcore == pvc && !thr0_done) | |
2438 | kvmppc_start_thread(NULL, pvc); | |
2439 | thr += pvc->num_threads; | |
2440 | } | |
2e25aa5f | 2441 | } |
371fefd6 | 2442 | |
7f235328 GS |
2443 | /* |
2444 | * Ensure that split_info.do_nap is set after setting | |
2445 | * the vcore pointer in the PACA of the secondaries. | |
2446 | */ | |
2447 | smp_mb(); | |
2448 | if (cmd_bit) | |
2449 | split_info.do_nap = 1; /* ask secondaries to nap when done */ | |
2450 | ||
b4deba5c PM |
2451 | /* |
2452 | * When doing micro-threading, poke the inactive threads as well. | |
2453 | * This gets them to the nap instruction after kvm_do_nap, | |
2454 | * which reduces the time taken to unsplit later. | |
2455 | */ | |
2456 | if (split > 1) | |
2457 | for (thr = 1; thr < threads_per_subcore; ++thr) | |
2458 | if (!(active & (1 << thr))) | |
2459 | kvmppc_ipi_thread(pcpu + thr); | |
e0b7ec05 | 2460 | |
2f12f034 | 2461 | vc->vcore_state = VCORE_RUNNING; |
19ccb76a | 2462 | preempt_disable(); |
3c78f78a SW |
2463 | |
2464 | trace_kvmppc_run_core(vc, 0); | |
2465 | ||
b4deba5c PM |
2466 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
2467 | list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) | |
2468 | spin_unlock(&pvc->lock); | |
de56a948 | 2469 | |
371fefd6 | 2470 | kvm_guest_enter(); |
2c9097e4 | 2471 | |
e0b7ec05 | 2472 | srcu_idx = srcu_read_lock(&vc->kvm->srcu); |
2c9097e4 | 2473 | |
9678cdaa SS |
2474 | if (vc->mpp_buffer_is_valid) |
2475 | kvmppc_start_restoring_l2_cache(vc); | |
2476 | ||
e0b7ec05 | 2477 | __kvmppc_vcore_entry(); |
de56a948 | 2478 | |
9678cdaa SS |
2479 | if (vc->mpp_buffer) |
2480 | kvmppc_start_saving_l2_cache(vc); | |
2481 | ||
ec257165 PM |
2482 | srcu_read_unlock(&vc->kvm->srcu, srcu_idx); |
2483 | ||
2484 | spin_lock(&vc->lock); | |
371fefd6 | 2485 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
19ccb76a | 2486 | vc->vcore_state = VCORE_EXITING; |
371fefd6 | 2487 | |
19ccb76a | 2488 | /* wait for secondary threads to finish writing their state to memory */ |
5d5b99cd | 2489 | kvmppc_wait_for_nap(); |
b4deba5c PM |
2490 | |
2491 | /* Return to whole-core mode if we split the core earlier */ | |
2492 | if (split > 1) { | |
2493 | unsigned long hid0 = mfspr(SPRN_HID0); | |
2494 | unsigned long loops = 0; | |
2495 | ||
2496 | hid0 &= ~HID0_POWER8_DYNLPARDIS; | |
2497 | stat_bit = HID0_POWER8_2LPARMODE | HID0_POWER8_4LPARMODE; | |
2498 | mb(); | |
2499 | mtspr(SPRN_HID0, hid0); | |
2500 | isync(); | |
2501 | for (;;) { | |
2502 | hid0 = mfspr(SPRN_HID0); | |
2503 | if (!(hid0 & stat_bit)) | |
2504 | break; | |
2505 | cpu_relax(); | |
2506 | ++loops; | |
2507 | } | |
2508 | split_info.do_nap = 0; | |
2509 | } | |
2510 | ||
2511 | /* Let secondaries go back to the offline loop */ | |
2512 | for (i = 0; i < threads_per_subcore; ++i) { | |
2513 | kvmppc_release_hwthread(pcpu + i); | |
2514 | if (sip && sip->napped[i]) | |
2515 | kvmppc_ipi_thread(pcpu + i); | |
2516 | } | |
2517 | ||
371fefd6 | 2518 | spin_unlock(&vc->lock); |
2c9097e4 | 2519 | |
371fefd6 PM |
2520 | /* make sure updates to secondary vcpu structs are visible now */ |
2521 | smp_mb(); | |
de56a948 PM |
2522 | kvm_guest_exit(); |
2523 | ||
b4deba5c PM |
2524 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
2525 | list_for_each_entry_safe(pvc, vcnext, &core_info.vcs[sub], | |
2526 | preempt_list) | |
2527 | post_guest_process(pvc, pvc == vc); | |
de56a948 | 2528 | |
913d3ff9 | 2529 | spin_lock(&vc->lock); |
ec257165 | 2530 | preempt_enable(); |
de56a948 PM |
2531 | |
2532 | out: | |
19ccb76a | 2533 | vc->vcore_state = VCORE_INACTIVE; |
3c78f78a | 2534 | trace_kvmppc_run_core(vc, 1); |
371fefd6 PM |
2535 | } |
2536 | ||
19ccb76a PM |
2537 | /* |
2538 | * Wait for some other vcpu thread to execute us, and | |
2539 | * wake us up when we need to handle something in the host. | |
2540 | */ | |
ec257165 PM |
2541 | static void kvmppc_wait_for_exec(struct kvmppc_vcore *vc, |
2542 | struct kvm_vcpu *vcpu, int wait_state) | |
371fefd6 | 2543 | { |
371fefd6 PM |
2544 | DEFINE_WAIT(wait); |
2545 | ||
19ccb76a | 2546 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
ec257165 PM |
2547 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
2548 | spin_unlock(&vc->lock); | |
19ccb76a | 2549 | schedule(); |
ec257165 PM |
2550 | spin_lock(&vc->lock); |
2551 | } | |
19ccb76a PM |
2552 | finish_wait(&vcpu->arch.cpu_run, &wait); |
2553 | } | |
2554 | ||
2555 | /* | |
2556 | * All the vcpus in this vcore are idle, so wait for a decrementer | |
2557 | * or external interrupt to one of the vcpus. vc->lock is held. | |
2558 | */ | |
2559 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) | |
2560 | { | |
1bc5d59c SW |
2561 | struct kvm_vcpu *vcpu; |
2562 | int do_sleep = 1; | |
2563 | ||
19ccb76a | 2564 | DEFINE_WAIT(wait); |
19ccb76a PM |
2565 | |
2566 | prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE); | |
1bc5d59c SW |
2567 | |
2568 | /* | |
2569 | * Check one last time for pending exceptions and ceded state after | |
2570 | * we put ourselves on the wait queue | |
2571 | */ | |
2572 | list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) { | |
2573 | if (vcpu->arch.pending_exceptions || !vcpu->arch.ceded) { | |
2574 | do_sleep = 0; | |
2575 | break; | |
2576 | } | |
2577 | } | |
2578 | ||
2579 | if (!do_sleep) { | |
2580 | finish_wait(&vc->wq, &wait); | |
2581 | return; | |
2582 | } | |
2583 | ||
19ccb76a | 2584 | vc->vcore_state = VCORE_SLEEPING; |
3c78f78a | 2585 | trace_kvmppc_vcore_blocked(vc, 0); |
19ccb76a | 2586 | spin_unlock(&vc->lock); |
913d3ff9 | 2587 | schedule(); |
19ccb76a PM |
2588 | finish_wait(&vc->wq, &wait); |
2589 | spin_lock(&vc->lock); | |
2590 | vc->vcore_state = VCORE_INACTIVE; | |
3c78f78a | 2591 | trace_kvmppc_vcore_blocked(vc, 1); |
19ccb76a | 2592 | } |
371fefd6 | 2593 | |
19ccb76a PM |
2594 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
2595 | { | |
2596 | int n_ceded; | |
19ccb76a PM |
2597 | struct kvmppc_vcore *vc; |
2598 | struct kvm_vcpu *v, *vn; | |
9e368f29 | 2599 | |
3c78f78a SW |
2600 | trace_kvmppc_run_vcpu_enter(vcpu); |
2601 | ||
371fefd6 PM |
2602 | kvm_run->exit_reason = 0; |
2603 | vcpu->arch.ret = RESUME_GUEST; | |
2604 | vcpu->arch.trap = 0; | |
2f12f034 | 2605 | kvmppc_update_vpas(vcpu); |
371fefd6 | 2606 | |
371fefd6 PM |
2607 | /* |
2608 | * Synchronize with other threads in this virtual core | |
2609 | */ | |
2610 | vc = vcpu->arch.vcore; | |
2611 | spin_lock(&vc->lock); | |
19ccb76a | 2612 | vcpu->arch.ceded = 0; |
371fefd6 PM |
2613 | vcpu->arch.run_task = current; |
2614 | vcpu->arch.kvm_run = kvm_run; | |
c7b67670 | 2615 | vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); |
19ccb76a | 2616 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
c7b67670 | 2617 | vcpu->arch.busy_preempt = TB_NIL; |
371fefd6 PM |
2618 | list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads); |
2619 | ++vc->n_runnable; | |
2620 | ||
19ccb76a PM |
2621 | /* |
2622 | * This happens the first time this is called for a vcpu. | |
2623 | * If the vcore is already running, we may be able to start | |
2624 | * this thread straight away and have it join in. | |
2625 | */ | |
8455d79e | 2626 | if (!signal_pending(current)) { |
ec257165 PM |
2627 | if (vc->vcore_state == VCORE_PIGGYBACK) { |
2628 | struct kvmppc_vcore *mvc = vc->master_vcore; | |
2629 | if (spin_trylock(&mvc->lock)) { | |
2630 | if (mvc->vcore_state == VCORE_RUNNING && | |
2631 | !VCORE_IS_EXITING(mvc)) { | |
2632 | kvmppc_create_dtl_entry(vcpu, vc); | |
b4deba5c | 2633 | kvmppc_start_thread(vcpu, vc); |
ec257165 PM |
2634 | trace_kvm_guest_enter(vcpu); |
2635 | } | |
2636 | spin_unlock(&mvc->lock); | |
2637 | } | |
2638 | } else if (vc->vcore_state == VCORE_RUNNING && | |
2639 | !VCORE_IS_EXITING(vc)) { | |
2f12f034 | 2640 | kvmppc_create_dtl_entry(vcpu, vc); |
b4deba5c | 2641 | kvmppc_start_thread(vcpu, vc); |
3c78f78a | 2642 | trace_kvm_guest_enter(vcpu); |
8455d79e PM |
2643 | } else if (vc->vcore_state == VCORE_SLEEPING) { |
2644 | wake_up(&vc->wq); | |
371fefd6 PM |
2645 | } |
2646 | ||
8455d79e | 2647 | } |
371fefd6 | 2648 | |
19ccb76a PM |
2649 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2650 | !signal_pending(current)) { | |
ec257165 PM |
2651 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
2652 | kvmppc_vcore_end_preempt(vc); | |
2653 | ||
8455d79e | 2654 | if (vc->vcore_state != VCORE_INACTIVE) { |
ec257165 | 2655 | kvmppc_wait_for_exec(vc, vcpu, TASK_INTERRUPTIBLE); |
19ccb76a PM |
2656 | continue; |
2657 | } | |
19ccb76a PM |
2658 | list_for_each_entry_safe(v, vn, &vc->runnable_threads, |
2659 | arch.run_list) { | |
7e28e60e | 2660 | kvmppc_core_prepare_to_enter(v); |
19ccb76a PM |
2661 | if (signal_pending(v->arch.run_task)) { |
2662 | kvmppc_remove_runnable(vc, v); | |
2663 | v->stat.signal_exits++; | |
2664 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; | |
2665 | v->arch.ret = -EINTR; | |
2666 | wake_up(&v->arch.cpu_run); | |
2667 | } | |
2668 | } | |
8455d79e PM |
2669 | if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
2670 | break; | |
8455d79e | 2671 | n_ceded = 0; |
4619ac88 | 2672 | list_for_each_entry(v, &vc->runnable_threads, arch.run_list) { |
8455d79e PM |
2673 | if (!v->arch.pending_exceptions) |
2674 | n_ceded += v->arch.ceded; | |
4619ac88 PM |
2675 | else |
2676 | v->arch.ceded = 0; | |
2677 | } | |
25fedfca PM |
2678 | vc->runner = vcpu; |
2679 | if (n_ceded == vc->n_runnable) { | |
8455d79e | 2680 | kvmppc_vcore_blocked(vc); |
c56dadf3 | 2681 | } else if (need_resched()) { |
ec257165 | 2682 | kvmppc_vcore_preempt(vc); |
25fedfca PM |
2683 | /* Let something else run */ |
2684 | cond_resched_lock(&vc->lock); | |
ec257165 PM |
2685 | if (vc->vcore_state == VCORE_PREEMPT) |
2686 | kvmppc_vcore_end_preempt(vc); | |
25fedfca | 2687 | } else { |
8455d79e | 2688 | kvmppc_run_core(vc); |
25fedfca | 2689 | } |
0456ec4f | 2690 | vc->runner = NULL; |
19ccb76a | 2691 | } |
371fefd6 | 2692 | |
8455d79e PM |
2693 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2694 | (vc->vcore_state == VCORE_RUNNING || | |
5fc3e64f PM |
2695 | vc->vcore_state == VCORE_EXITING || |
2696 | vc->vcore_state == VCORE_PIGGYBACK)) | |
ec257165 | 2697 | kvmppc_wait_for_exec(vc, vcpu, TASK_UNINTERRUPTIBLE); |
8455d79e | 2698 | |
5fc3e64f PM |
2699 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
2700 | kvmppc_vcore_end_preempt(vc); | |
2701 | ||
8455d79e PM |
2702 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
2703 | kvmppc_remove_runnable(vc, vcpu); | |
2704 | vcpu->stat.signal_exits++; | |
2705 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
2706 | vcpu->arch.ret = -EINTR; | |
2707 | } | |
2708 | ||
2709 | if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { | |
2710 | /* Wake up some vcpu to run the core */ | |
2711 | v = list_first_entry(&vc->runnable_threads, | |
2712 | struct kvm_vcpu, arch.run_list); | |
2713 | wake_up(&v->arch.cpu_run); | |
371fefd6 PM |
2714 | } |
2715 | ||
3c78f78a | 2716 | trace_kvmppc_run_vcpu_exit(vcpu, kvm_run); |
371fefd6 | 2717 | spin_unlock(&vc->lock); |
371fefd6 | 2718 | return vcpu->arch.ret; |
de56a948 PM |
2719 | } |
2720 | ||
3a167bea | 2721 | static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu) |
a8606e20 PM |
2722 | { |
2723 | int r; | |
913d3ff9 | 2724 | int srcu_idx; |
a8606e20 | 2725 | |
af8f38b3 AG |
2726 | if (!vcpu->arch.sane) { |
2727 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
2728 | return -EINVAL; | |
2729 | } | |
2730 | ||
25051b5a SW |
2731 | kvmppc_core_prepare_to_enter(vcpu); |
2732 | ||
19ccb76a PM |
2733 | /* No need to go into the guest when all we'll do is come back out */ |
2734 | if (signal_pending(current)) { | |
2735 | run->exit_reason = KVM_EXIT_INTR; | |
2736 | return -EINTR; | |
2737 | } | |
2738 | ||
32fad281 | 2739 | atomic_inc(&vcpu->kvm->arch.vcpus_running); |
31037eca | 2740 | /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */ |
32fad281 PM |
2741 | smp_mb(); |
2742 | ||
c17b98cf | 2743 | /* On the first time here, set up HTAB and VRMA */ |
31037eca | 2744 | if (!vcpu->kvm->arch.hpte_setup_done) { |
32fad281 | 2745 | r = kvmppc_hv_setup_htab_rma(vcpu); |
c77162de | 2746 | if (r) |
32fad281 | 2747 | goto out; |
c77162de | 2748 | } |
19ccb76a PM |
2749 | |
2750 | flush_fp_to_thread(current); | |
2751 | flush_altivec_to_thread(current); | |
2752 | flush_vsx_to_thread(current); | |
2753 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; | |
342d3db7 | 2754 | vcpu->arch.pgdir = current->mm->pgd; |
c7b67670 | 2755 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
19ccb76a | 2756 | |
a8606e20 PM |
2757 | do { |
2758 | r = kvmppc_run_vcpu(run, vcpu); | |
2759 | ||
2760 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && | |
2761 | !(vcpu->arch.shregs.msr & MSR_PR)) { | |
3c78f78a | 2762 | trace_kvm_hcall_enter(vcpu); |
a8606e20 | 2763 | r = kvmppc_pseries_do_hcall(vcpu); |
3c78f78a | 2764 | trace_kvm_hcall_exit(vcpu, r); |
7e28e60e | 2765 | kvmppc_core_prepare_to_enter(vcpu); |
913d3ff9 PM |
2766 | } else if (r == RESUME_PAGE_FAULT) { |
2767 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2768 | r = kvmppc_book3s_hv_page_fault(run, vcpu, | |
2769 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
2770 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
a8606e20 | 2771 | } |
e59d24e6 | 2772 | } while (is_kvmppc_resume_guest(r)); |
32fad281 PM |
2773 | |
2774 | out: | |
c7b67670 | 2775 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
32fad281 | 2776 | atomic_dec(&vcpu->kvm->arch.vcpus_running); |
a8606e20 PM |
2777 | return r; |
2778 | } | |
2779 | ||
5b74716e BH |
2780 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
2781 | int linux_psize) | |
2782 | { | |
2783 | struct mmu_psize_def *def = &mmu_psize_defs[linux_psize]; | |
2784 | ||
2785 | if (!def->shift) | |
2786 | return; | |
2787 | (*sps)->page_shift = def->shift; | |
2788 | (*sps)->slb_enc = def->sllp; | |
2789 | (*sps)->enc[0].page_shift = def->shift; | |
b1022fbd | 2790 | (*sps)->enc[0].pte_enc = def->penc[linux_psize]; |
1f365bb0 AK |
2791 | /* |
2792 | * Add 16MB MPSS support if host supports it | |
2793 | */ | |
2794 | if (linux_psize != MMU_PAGE_16M && def->penc[MMU_PAGE_16M] != -1) { | |
2795 | (*sps)->enc[1].page_shift = 24; | |
2796 | (*sps)->enc[1].pte_enc = def->penc[MMU_PAGE_16M]; | |
2797 | } | |
5b74716e BH |
2798 | (*sps)++; |
2799 | } | |
2800 | ||
3a167bea AK |
2801 | static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm, |
2802 | struct kvm_ppc_smmu_info *info) | |
5b74716e BH |
2803 | { |
2804 | struct kvm_ppc_one_seg_page_size *sps; | |
2805 | ||
2806 | info->flags = KVM_PPC_PAGE_SIZES_REAL; | |
2807 | if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) | |
2808 | info->flags |= KVM_PPC_1T_SEGMENTS; | |
2809 | info->slb_size = mmu_slb_size; | |
2810 | ||
2811 | /* We only support these sizes for now, and no muti-size segments */ | |
2812 | sps = &info->sps[0]; | |
2813 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K); | |
2814 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K); | |
2815 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M); | |
2816 | ||
2817 | return 0; | |
2818 | } | |
2819 | ||
82ed3616 PM |
2820 | /* |
2821 | * Get (and clear) the dirty memory log for a memory slot. | |
2822 | */ | |
3a167bea AK |
2823 | static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm, |
2824 | struct kvm_dirty_log *log) | |
82ed3616 | 2825 | { |
9f6b8029 | 2826 | struct kvm_memslots *slots; |
82ed3616 PM |
2827 | struct kvm_memory_slot *memslot; |
2828 | int r; | |
2829 | unsigned long n; | |
2830 | ||
2831 | mutex_lock(&kvm->slots_lock); | |
2832 | ||
2833 | r = -EINVAL; | |
bbacc0c1 | 2834 | if (log->slot >= KVM_USER_MEM_SLOTS) |
82ed3616 PM |
2835 | goto out; |
2836 | ||
9f6b8029 PB |
2837 | slots = kvm_memslots(kvm); |
2838 | memslot = id_to_memslot(slots, log->slot); | |
82ed3616 PM |
2839 | r = -ENOENT; |
2840 | if (!memslot->dirty_bitmap) | |
2841 | goto out; | |
2842 | ||
2843 | n = kvm_dirty_bitmap_bytes(memslot); | |
2844 | memset(memslot->dirty_bitmap, 0, n); | |
2845 | ||
dfe49dbd | 2846 | r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap); |
82ed3616 PM |
2847 | if (r) |
2848 | goto out; | |
2849 | ||
2850 | r = -EFAULT; | |
2851 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
2852 | goto out; | |
2853 | ||
2854 | r = 0; | |
2855 | out: | |
2856 | mutex_unlock(&kvm->slots_lock); | |
2857 | return r; | |
2858 | } | |
2859 | ||
3a167bea AK |
2860 | static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free, |
2861 | struct kvm_memory_slot *dont) | |
a66b48c3 PM |
2862 | { |
2863 | if (!dont || free->arch.rmap != dont->arch.rmap) { | |
2864 | vfree(free->arch.rmap); | |
2865 | free->arch.rmap = NULL; | |
b2b2f165 | 2866 | } |
a66b48c3 PM |
2867 | } |
2868 | ||
3a167bea AK |
2869 | static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot, |
2870 | unsigned long npages) | |
a66b48c3 PM |
2871 | { |
2872 | slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); | |
2873 | if (!slot->arch.rmap) | |
2874 | return -ENOMEM; | |
aa04b4cc | 2875 | |
c77162de PM |
2876 | return 0; |
2877 | } | |
aa04b4cc | 2878 | |
3a167bea AK |
2879 | static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, |
2880 | struct kvm_memory_slot *memslot, | |
09170a49 | 2881 | const struct kvm_userspace_memory_region *mem) |
c77162de | 2882 | { |
a66b48c3 | 2883 | return 0; |
c77162de PM |
2884 | } |
2885 | ||
3a167bea | 2886 | static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, |
09170a49 | 2887 | const struct kvm_userspace_memory_region *mem, |
f36f3f28 PB |
2888 | const struct kvm_memory_slot *old, |
2889 | const struct kvm_memory_slot *new) | |
c77162de | 2890 | { |
dfe49dbd | 2891 | unsigned long npages = mem->memory_size >> PAGE_SHIFT; |
9f6b8029 | 2892 | struct kvm_memslots *slots; |
dfe49dbd PM |
2893 | struct kvm_memory_slot *memslot; |
2894 | ||
8482644a | 2895 | if (npages && old->npages) { |
dfe49dbd PM |
2896 | /* |
2897 | * If modifying a memslot, reset all the rmap dirty bits. | |
2898 | * If this is a new memslot, we don't need to do anything | |
2899 | * since the rmap array starts out as all zeroes, | |
2900 | * i.e. no pages are dirty. | |
2901 | */ | |
9f6b8029 PB |
2902 | slots = kvm_memslots(kvm); |
2903 | memslot = id_to_memslot(slots, mem->slot); | |
dfe49dbd PM |
2904 | kvmppc_hv_get_dirty_log(kvm, memslot, NULL); |
2905 | } | |
c77162de PM |
2906 | } |
2907 | ||
a0144e2a PM |
2908 | /* |
2909 | * Update LPCR values in kvm->arch and in vcores. | |
2910 | * Caller must hold kvm->lock. | |
2911 | */ | |
2912 | void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask) | |
2913 | { | |
2914 | long int i; | |
2915 | u32 cores_done = 0; | |
2916 | ||
2917 | if ((kvm->arch.lpcr & mask) == lpcr) | |
2918 | return; | |
2919 | ||
2920 | kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr; | |
2921 | ||
2922 | for (i = 0; i < KVM_MAX_VCORES; ++i) { | |
2923 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; | |
2924 | if (!vc) | |
2925 | continue; | |
2926 | spin_lock(&vc->lock); | |
2927 | vc->lpcr = (vc->lpcr & ~mask) | lpcr; | |
2928 | spin_unlock(&vc->lock); | |
2929 | if (++cores_done >= kvm->arch.online_vcores) | |
2930 | break; | |
2931 | } | |
2932 | } | |
2933 | ||
3a167bea AK |
2934 | static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu) |
2935 | { | |
2936 | return; | |
2937 | } | |
2938 | ||
32fad281 | 2939 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
c77162de PM |
2940 | { |
2941 | int err = 0; | |
2942 | struct kvm *kvm = vcpu->kvm; | |
c77162de PM |
2943 | unsigned long hva; |
2944 | struct kvm_memory_slot *memslot; | |
2945 | struct vm_area_struct *vma; | |
a0144e2a | 2946 | unsigned long lpcr = 0, senc; |
c77162de | 2947 | unsigned long psize, porder; |
2c9097e4 | 2948 | int srcu_idx; |
c77162de PM |
2949 | |
2950 | mutex_lock(&kvm->lock); | |
31037eca | 2951 | if (kvm->arch.hpte_setup_done) |
c77162de | 2952 | goto out; /* another vcpu beat us to it */ |
aa04b4cc | 2953 | |
32fad281 PM |
2954 | /* Allocate hashed page table (if not done already) and reset it */ |
2955 | if (!kvm->arch.hpt_virt) { | |
2956 | err = kvmppc_alloc_hpt(kvm, NULL); | |
2957 | if (err) { | |
2958 | pr_err("KVM: Couldn't alloc HPT\n"); | |
2959 | goto out; | |
2960 | } | |
2961 | } | |
2962 | ||
c77162de | 2963 | /* Look up the memslot for guest physical address 0 */ |
2c9097e4 | 2964 | srcu_idx = srcu_read_lock(&kvm->srcu); |
c77162de | 2965 | memslot = gfn_to_memslot(kvm, 0); |
aa04b4cc | 2966 | |
c77162de PM |
2967 | /* We must have some memory at 0 by now */ |
2968 | err = -EINVAL; | |
2969 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) | |
2c9097e4 | 2970 | goto out_srcu; |
c77162de PM |
2971 | |
2972 | /* Look up the VMA for the start of this memory slot */ | |
2973 | hva = memslot->userspace_addr; | |
2974 | down_read(¤t->mm->mmap_sem); | |
2975 | vma = find_vma(current->mm, hva); | |
2976 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) | |
2977 | goto up_out; | |
2978 | ||
2979 | psize = vma_kernel_pagesize(vma); | |
da9d1d7f | 2980 | porder = __ilog2(psize); |
c77162de | 2981 | |
c77162de PM |
2982 | up_read(¤t->mm->mmap_sem); |
2983 | ||
c17b98cf PM |
2984 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
2985 | err = -EINVAL; | |
2986 | if (!(psize == 0x1000 || psize == 0x10000 || | |
2987 | psize == 0x1000000)) | |
2988 | goto out_srcu; | |
c77162de | 2989 | |
c17b98cf PM |
2990 | /* Update VRMASD field in the LPCR */ |
2991 | senc = slb_pgsize_encoding(psize); | |
2992 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | | |
2993 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
2994 | /* the -4 is to account for senc values starting at 0x10 */ | |
2995 | lpcr = senc << (LPCR_VRMASD_SH - 4); | |
c77162de | 2996 | |
c17b98cf PM |
2997 | /* Create HPTEs in the hash page table for the VRMA */ |
2998 | kvmppc_map_vrma(vcpu, memslot, porder); | |
aa04b4cc | 2999 | |
c17b98cf | 3000 | kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD); |
a0144e2a | 3001 | |
31037eca | 3002 | /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */ |
c77162de | 3003 | smp_wmb(); |
31037eca | 3004 | kvm->arch.hpte_setup_done = 1; |
c77162de | 3005 | err = 0; |
2c9097e4 PM |
3006 | out_srcu: |
3007 | srcu_read_unlock(&kvm->srcu, srcu_idx); | |
c77162de PM |
3008 | out: |
3009 | mutex_unlock(&kvm->lock); | |
3010 | return err; | |
b2b2f165 | 3011 | |
c77162de PM |
3012 | up_out: |
3013 | up_read(¤t->mm->mmap_sem); | |
505d6421 | 3014 | goto out_srcu; |
de56a948 PM |
3015 | } |
3016 | ||
3a167bea | 3017 | static int kvmppc_core_init_vm_hv(struct kvm *kvm) |
de56a948 | 3018 | { |
32fad281 | 3019 | unsigned long lpcr, lpid; |
e23a808b | 3020 | char buf[32]; |
de56a948 | 3021 | |
32fad281 PM |
3022 | /* Allocate the guest's logical partition ID */ |
3023 | ||
3024 | lpid = kvmppc_alloc_lpid(); | |
5d226ae5 | 3025 | if ((long)lpid < 0) |
32fad281 PM |
3026 | return -ENOMEM; |
3027 | kvm->arch.lpid = lpid; | |
de56a948 | 3028 | |
1b400ba0 PM |
3029 | /* |
3030 | * Since we don't flush the TLB when tearing down a VM, | |
3031 | * and this lpid might have previously been used, | |
3032 | * make sure we flush on each core before running the new VM. | |
3033 | */ | |
3034 | cpumask_setall(&kvm->arch.need_tlb_flush); | |
3035 | ||
699a0ea0 PM |
3036 | /* Start out with the default set of hcalls enabled */ |
3037 | memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls, | |
3038 | sizeof(kvm->arch.enabled_hcalls)); | |
3039 | ||
9e368f29 | 3040 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); |
aa04b4cc | 3041 | |
c17b98cf PM |
3042 | /* Init LPCR for virtual RMA mode */ |
3043 | kvm->arch.host_lpid = mfspr(SPRN_LPID); | |
3044 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); | |
3045 | lpcr &= LPCR_PECE | LPCR_LPES; | |
3046 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | | |
3047 | LPCR_VPM0 | LPCR_VPM1; | |
3048 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | | |
3049 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
3050 | /* On POWER8 turn on online bit to enable PURR/SPURR */ | |
3051 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
3052 | lpcr |= LPCR_ONL; | |
9e368f29 | 3053 | kvm->arch.lpcr = lpcr; |
aa04b4cc | 3054 | |
512691d4 | 3055 | /* |
441c19c8 ME |
3056 | * Track that we now have a HV mode VM active. This blocks secondary |
3057 | * CPU threads from coming online. | |
512691d4 | 3058 | */ |
441c19c8 | 3059 | kvm_hv_vm_activated(); |
512691d4 | 3060 | |
e23a808b PM |
3061 | /* |
3062 | * Create a debugfs directory for the VM | |
3063 | */ | |
3064 | snprintf(buf, sizeof(buf), "vm%d", current->pid); | |
3065 | kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir); | |
3066 | if (!IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
3067 | kvmppc_mmu_debugfs_init(kvm); | |
3068 | ||
54738c09 | 3069 | return 0; |
de56a948 PM |
3070 | } |
3071 | ||
f1378b1c PM |
3072 | static void kvmppc_free_vcores(struct kvm *kvm) |
3073 | { | |
3074 | long int i; | |
3075 | ||
9678cdaa SS |
3076 | for (i = 0; i < KVM_MAX_VCORES; ++i) { |
3077 | if (kvm->arch.vcores[i] && kvm->arch.vcores[i]->mpp_buffer) { | |
3078 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; | |
3079 | free_pages((unsigned long)vc->mpp_buffer, | |
3080 | MPP_BUFFER_ORDER); | |
3081 | } | |
f1378b1c | 3082 | kfree(kvm->arch.vcores[i]); |
9678cdaa | 3083 | } |
f1378b1c PM |
3084 | kvm->arch.online_vcores = 0; |
3085 | } | |
3086 | ||
3a167bea | 3087 | static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) |
de56a948 | 3088 | { |
e23a808b PM |
3089 | debugfs_remove_recursive(kvm->arch.debugfs_dir); |
3090 | ||
441c19c8 | 3091 | kvm_hv_vm_deactivated(); |
512691d4 | 3092 | |
f1378b1c | 3093 | kvmppc_free_vcores(kvm); |
aa04b4cc | 3094 | |
de56a948 PM |
3095 | kvmppc_free_hpt(kvm); |
3096 | } | |
3097 | ||
3a167bea AK |
3098 | /* We don't need to emulate any privileged instructions or dcbz */ |
3099 | static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
3100 | unsigned int inst, int *advance) | |
de56a948 | 3101 | { |
3a167bea | 3102 | return EMULATE_FAIL; |
de56a948 PM |
3103 | } |
3104 | ||
3a167bea AK |
3105 | static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn, |
3106 | ulong spr_val) | |
de56a948 PM |
3107 | { |
3108 | return EMULATE_FAIL; | |
3109 | } | |
3110 | ||
3a167bea AK |
3111 | static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn, |
3112 | ulong *spr_val) | |
de56a948 PM |
3113 | { |
3114 | return EMULATE_FAIL; | |
3115 | } | |
3116 | ||
3a167bea | 3117 | static int kvmppc_core_check_processor_compat_hv(void) |
de56a948 | 3118 | { |
c17b98cf PM |
3119 | if (!cpu_has_feature(CPU_FTR_HVMODE) || |
3120 | !cpu_has_feature(CPU_FTR_ARCH_206)) | |
3a167bea AK |
3121 | return -EIO; |
3122 | return 0; | |
de56a948 PM |
3123 | } |
3124 | ||
3a167bea AK |
3125 | static long kvm_arch_vm_ioctl_hv(struct file *filp, |
3126 | unsigned int ioctl, unsigned long arg) | |
3127 | { | |
3128 | struct kvm *kvm __maybe_unused = filp->private_data; | |
3129 | void __user *argp = (void __user *)arg; | |
3130 | long r; | |
3131 | ||
3132 | switch (ioctl) { | |
3133 | ||
3a167bea AK |
3134 | case KVM_PPC_ALLOCATE_HTAB: { |
3135 | u32 htab_order; | |
3136 | ||
3137 | r = -EFAULT; | |
3138 | if (get_user(htab_order, (u32 __user *)argp)) | |
3139 | break; | |
3140 | r = kvmppc_alloc_reset_hpt(kvm, &htab_order); | |
3141 | if (r) | |
3142 | break; | |
3143 | r = -EFAULT; | |
3144 | if (put_user(htab_order, (u32 __user *)argp)) | |
3145 | break; | |
3146 | r = 0; | |
3147 | break; | |
3148 | } | |
3149 | ||
3150 | case KVM_PPC_GET_HTAB_FD: { | |
3151 | struct kvm_get_htab_fd ghf; | |
3152 | ||
3153 | r = -EFAULT; | |
3154 | if (copy_from_user(&ghf, argp, sizeof(ghf))) | |
3155 | break; | |
3156 | r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); | |
3157 | break; | |
3158 | } | |
3159 | ||
3160 | default: | |
3161 | r = -ENOTTY; | |
3162 | } | |
3163 | ||
3164 | return r; | |
3165 | } | |
3166 | ||
699a0ea0 PM |
3167 | /* |
3168 | * List of hcall numbers to enable by default. | |
3169 | * For compatibility with old userspace, we enable by default | |
3170 | * all hcalls that were implemented before the hcall-enabling | |
3171 | * facility was added. Note this list should not include H_RTAS. | |
3172 | */ | |
3173 | static unsigned int default_hcall_list[] = { | |
3174 | H_REMOVE, | |
3175 | H_ENTER, | |
3176 | H_READ, | |
3177 | H_PROTECT, | |
3178 | H_BULK_REMOVE, | |
3179 | H_GET_TCE, | |
3180 | H_PUT_TCE, | |
3181 | H_SET_DABR, | |
3182 | H_SET_XDABR, | |
3183 | H_CEDE, | |
3184 | H_PROD, | |
3185 | H_CONFER, | |
3186 | H_REGISTER_VPA, | |
3187 | #ifdef CONFIG_KVM_XICS | |
3188 | H_EOI, | |
3189 | H_CPPR, | |
3190 | H_IPI, | |
3191 | H_IPOLL, | |
3192 | H_XIRR, | |
3193 | H_XIRR_X, | |
3194 | #endif | |
3195 | 0 | |
3196 | }; | |
3197 | ||
3198 | static void init_default_hcalls(void) | |
3199 | { | |
3200 | int i; | |
ae2113a4 | 3201 | unsigned int hcall; |
699a0ea0 | 3202 | |
ae2113a4 PM |
3203 | for (i = 0; default_hcall_list[i]; ++i) { |
3204 | hcall = default_hcall_list[i]; | |
3205 | WARN_ON(!kvmppc_hcall_impl_hv(hcall)); | |
3206 | __set_bit(hcall / 4, default_enabled_hcalls); | |
3207 | } | |
699a0ea0 PM |
3208 | } |
3209 | ||
cbbc58d4 | 3210 | static struct kvmppc_ops kvm_ops_hv = { |
3a167bea AK |
3211 | .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, |
3212 | .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, | |
3213 | .get_one_reg = kvmppc_get_one_reg_hv, | |
3214 | .set_one_reg = kvmppc_set_one_reg_hv, | |
3215 | .vcpu_load = kvmppc_core_vcpu_load_hv, | |
3216 | .vcpu_put = kvmppc_core_vcpu_put_hv, | |
3217 | .set_msr = kvmppc_set_msr_hv, | |
3218 | .vcpu_run = kvmppc_vcpu_run_hv, | |
3219 | .vcpu_create = kvmppc_core_vcpu_create_hv, | |
3220 | .vcpu_free = kvmppc_core_vcpu_free_hv, | |
3221 | .check_requests = kvmppc_core_check_requests_hv, | |
3222 | .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv, | |
3223 | .flush_memslot = kvmppc_core_flush_memslot_hv, | |
3224 | .prepare_memory_region = kvmppc_core_prepare_memory_region_hv, | |
3225 | .commit_memory_region = kvmppc_core_commit_memory_region_hv, | |
3226 | .unmap_hva = kvm_unmap_hva_hv, | |
3227 | .unmap_hva_range = kvm_unmap_hva_range_hv, | |
3228 | .age_hva = kvm_age_hva_hv, | |
3229 | .test_age_hva = kvm_test_age_hva_hv, | |
3230 | .set_spte_hva = kvm_set_spte_hva_hv, | |
3231 | .mmu_destroy = kvmppc_mmu_destroy_hv, | |
3232 | .free_memslot = kvmppc_core_free_memslot_hv, | |
3233 | .create_memslot = kvmppc_core_create_memslot_hv, | |
3234 | .init_vm = kvmppc_core_init_vm_hv, | |
3235 | .destroy_vm = kvmppc_core_destroy_vm_hv, | |
3a167bea AK |
3236 | .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv, |
3237 | .emulate_op = kvmppc_core_emulate_op_hv, | |
3238 | .emulate_mtspr = kvmppc_core_emulate_mtspr_hv, | |
3239 | .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, | |
3240 | .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, | |
3241 | .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, | |
ae2113a4 | 3242 | .hcall_implemented = kvmppc_hcall_impl_hv, |
3a167bea AK |
3243 | }; |
3244 | ||
3245 | static int kvmppc_book3s_init_hv(void) | |
de56a948 PM |
3246 | { |
3247 | int r; | |
cbbc58d4 AK |
3248 | /* |
3249 | * FIXME!! Do we need to check on all cpus ? | |
3250 | */ | |
3251 | r = kvmppc_core_check_processor_compat_hv(); | |
3252 | if (r < 0) | |
739e2425 | 3253 | return -ENODEV; |
de56a948 | 3254 | |
cbbc58d4 AK |
3255 | kvm_ops_hv.owner = THIS_MODULE; |
3256 | kvmppc_hv_ops = &kvm_ops_hv; | |
de56a948 | 3257 | |
699a0ea0 PM |
3258 | init_default_hcalls(); |
3259 | ||
ec257165 PM |
3260 | init_vcore_lists(); |
3261 | ||
cbbc58d4 | 3262 | r = kvmppc_mmu_hv_init(); |
de56a948 PM |
3263 | return r; |
3264 | } | |
3265 | ||
3a167bea | 3266 | static void kvmppc_book3s_exit_hv(void) |
de56a948 | 3267 | { |
cbbc58d4 | 3268 | kvmppc_hv_ops = NULL; |
de56a948 PM |
3269 | } |
3270 | ||
3a167bea AK |
3271 | module_init(kvmppc_book3s_init_hv); |
3272 | module_exit(kvmppc_book3s_exit_hv); | |
2ba9f0d8 | 3273 | MODULE_LICENSE("GPL"); |
398a76c6 AG |
3274 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
3275 | MODULE_ALIAS("devname:kvm"); |