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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> | |
07f8ab25 | 30 | #include <linux/cpu.h> |
de56a948 | 31 | #include <linux/cpumask.h> |
aa04b4cc PM |
32 | #include <linux/spinlock.h> |
33 | #include <linux/page-flags.h> | |
2c9097e4 | 34 | #include <linux/srcu.h> |
398a76c6 | 35 | #include <linux/miscdevice.h> |
e23a808b | 36 | #include <linux/debugfs.h> |
de56a948 PM |
37 | |
38 | #include <asm/reg.h> | |
39 | #include <asm/cputable.h> | |
40 | #include <asm/cacheflush.h> | |
41 | #include <asm/tlbflush.h> | |
7c0f6ba6 | 42 | #include <linux/uaccess.h> |
de56a948 PM |
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> |
fd7bacbc | 55 | #include <asm/hmi.h> |
c57875f5 | 56 | #include <asm/pnv-pci.h> |
7a84084c | 57 | #include <asm/mmu.h> |
f725758b PM |
58 | #include <asm/opal.h> |
59 | #include <asm/xics.h> | |
de56a948 | 60 | #include <linux/gfp.h> |
de56a948 PM |
61 | #include <linux/vmalloc.h> |
62 | #include <linux/highmem.h> | |
c77162de | 63 | #include <linux/hugetlb.h> |
c57875f5 SW |
64 | #include <linux/kvm_irqfd.h> |
65 | #include <linux/irqbypass.h> | |
2ba9f0d8 | 66 | #include <linux/module.h> |
7b5f8272 | 67 | #include <linux/compiler.h> |
f725758b | 68 | #include <linux/of.h> |
de56a948 | 69 | |
3a167bea AK |
70 | #include "book3s.h" |
71 | ||
3c78f78a SW |
72 | #define CREATE_TRACE_POINTS |
73 | #include "trace_hv.h" | |
74 | ||
de56a948 PM |
75 | /* #define EXIT_DEBUG */ |
76 | /* #define EXIT_DEBUG_SIMPLE */ | |
77 | /* #define EXIT_DEBUG_INT */ | |
78 | ||
913d3ff9 PM |
79 | /* Used to indicate that a guest page fault needs to be handled */ |
80 | #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1) | |
f7af5209 SW |
81 | /* Used to indicate that a guest passthrough interrupt needs to be handled */ |
82 | #define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2) | |
913d3ff9 | 83 | |
c7b67670 PM |
84 | /* Used as a "null" value for timebase values */ |
85 | #define TB_NIL (~(u64)0) | |
86 | ||
699a0ea0 PM |
87 | static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1); |
88 | ||
b4deba5c PM |
89 | static int dynamic_mt_modes = 6; |
90 | module_param(dynamic_mt_modes, int, S_IRUGO | S_IWUSR); | |
91 | MODULE_PARM_DESC(dynamic_mt_modes, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)"); | |
ec257165 PM |
92 | static int target_smt_mode; |
93 | module_param(target_smt_mode, int, S_IRUGO | S_IWUSR); | |
94 | MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)"); | |
9678cdaa | 95 | |
520fe9c6 SW |
96 | #ifdef CONFIG_KVM_XICS |
97 | static struct kernel_param_ops module_param_ops = { | |
98 | .set = param_set_int, | |
99 | .get = param_get_int, | |
100 | }; | |
101 | ||
644abbb2 SW |
102 | module_param_cb(kvm_irq_bypass, &module_param_ops, &kvm_irq_bypass, |
103 | S_IRUGO | S_IWUSR); | |
104 | MODULE_PARM_DESC(kvm_irq_bypass, "Bypass passthrough interrupt optimization"); | |
105 | ||
520fe9c6 SW |
106 | module_param_cb(h_ipi_redirect, &module_param_ops, &h_ipi_redirect, |
107 | S_IRUGO | S_IWUSR); | |
108 | MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core"); | |
109 | #endif | |
110 | ||
19ccb76a | 111 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
32fad281 | 112 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
19ccb76a | 113 | |
7b5f8272 SJS |
114 | static inline struct kvm_vcpu *next_runnable_thread(struct kvmppc_vcore *vc, |
115 | int *ip) | |
116 | { | |
117 | int i = *ip; | |
118 | struct kvm_vcpu *vcpu; | |
119 | ||
120 | while (++i < MAX_SMT_THREADS) { | |
121 | vcpu = READ_ONCE(vc->runnable_threads[i]); | |
122 | if (vcpu) { | |
123 | *ip = i; | |
124 | return vcpu; | |
125 | } | |
126 | } | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | /* Used to traverse the list of runnable threads for a given vcore */ | |
131 | #define for_each_runnable_thread(i, vcpu, vc) \ | |
132 | for (i = -1; (vcpu = next_runnable_thread(vc, &i)); ) | |
133 | ||
66feed61 PM |
134 | static bool kvmppc_ipi_thread(int cpu) |
135 | { | |
1704a81c PM |
136 | unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER); |
137 | ||
138 | /* On POWER9 we can use msgsnd to IPI any cpu */ | |
139 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { | |
140 | msg |= get_hard_smp_processor_id(cpu); | |
141 | smp_mb(); | |
142 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
143 | return true; | |
144 | } | |
145 | ||
66feed61 PM |
146 | /* On POWER8 for IPIs to threads in the same core, use msgsnd */ |
147 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) { | |
148 | preempt_disable(); | |
149 | if (cpu_first_thread_sibling(cpu) == | |
150 | cpu_first_thread_sibling(smp_processor_id())) { | |
66feed61 PM |
151 | msg |= cpu_thread_in_core(cpu); |
152 | smp_mb(); | |
153 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
154 | preempt_enable(); | |
155 | return true; | |
156 | } | |
157 | preempt_enable(); | |
158 | } | |
159 | ||
160 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) | |
f725758b PM |
161 | if (cpu >= 0 && cpu < nr_cpu_ids) { |
162 | if (paca[cpu].kvm_hstate.xics_phys) { | |
163 | xics_wake_cpu(cpu); | |
164 | return true; | |
165 | } | |
166 | opal_int_set_mfrr(get_hard_smp_processor_id(cpu), IPI_PRIORITY); | |
66feed61 PM |
167 | return true; |
168 | } | |
169 | #endif | |
170 | ||
171 | return false; | |
172 | } | |
173 | ||
3a167bea | 174 | static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) |
54695c30 | 175 | { |
ec257165 | 176 | int cpu; |
8577370f | 177 | struct swait_queue_head *wqp; |
54695c30 BH |
178 | |
179 | wqp = kvm_arch_vcpu_wq(vcpu); | |
8577370f MT |
180 | if (swait_active(wqp)) { |
181 | swake_up(wqp); | |
54695c30 BH |
182 | ++vcpu->stat.halt_wakeup; |
183 | } | |
184 | ||
ec257165 | 185 | if (kvmppc_ipi_thread(vcpu->arch.thread_cpu)) |
66feed61 | 186 | return; |
54695c30 BH |
187 | |
188 | /* CPU points to the first thread of the core */ | |
ec257165 | 189 | cpu = vcpu->cpu; |
66feed61 PM |
190 | if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu)) |
191 | smp_send_reschedule(cpu); | |
54695c30 BH |
192 | } |
193 | ||
c7b67670 PM |
194 | /* |
195 | * We use the vcpu_load/put functions to measure stolen time. | |
196 | * Stolen time is counted as time when either the vcpu is able to | |
197 | * run as part of a virtual core, but the task running the vcore | |
198 | * is preempted or sleeping, or when the vcpu needs something done | |
199 | * in the kernel by the task running the vcpu, but that task is | |
200 | * preempted or sleeping. Those two things have to be counted | |
201 | * separately, since one of the vcpu tasks will take on the job | |
202 | * of running the core, and the other vcpu tasks in the vcore will | |
203 | * sleep waiting for it to do that, but that sleep shouldn't count | |
204 | * as stolen time. | |
205 | * | |
206 | * Hence we accumulate stolen time when the vcpu can run as part of | |
207 | * a vcore using vc->stolen_tb, and the stolen time when the vcpu | |
208 | * needs its task to do other things in the kernel (for example, | |
209 | * service a page fault) in busy_stolen. We don't accumulate | |
210 | * stolen time for a vcore when it is inactive, or for a vcpu | |
211 | * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of | |
212 | * a misnomer; it means that the vcpu task is not executing in | |
213 | * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in | |
214 | * the kernel. We don't have any way of dividing up that time | |
215 | * between time that the vcpu is genuinely stopped, time that | |
216 | * the task is actively working on behalf of the vcpu, and time | |
217 | * that the task is preempted, so we don't count any of it as | |
218 | * stolen. | |
219 | * | |
220 | * Updates to busy_stolen are protected by arch.tbacct_lock; | |
2711e248 PM |
221 | * updates to vc->stolen_tb are protected by the vcore->stoltb_lock |
222 | * lock. The stolen times are measured in units of timebase ticks. | |
223 | * (Note that the != TB_NIL checks below are purely defensive; | |
224 | * they should never fail.) | |
c7b67670 PM |
225 | */ |
226 | ||
ec257165 PM |
227 | static void kvmppc_core_start_stolen(struct kvmppc_vcore *vc) |
228 | { | |
229 | unsigned long flags; | |
230 | ||
231 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
232 | vc->preempt_tb = mftb(); | |
233 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
234 | } | |
235 | ||
236 | static void kvmppc_core_end_stolen(struct kvmppc_vcore *vc) | |
237 | { | |
238 | unsigned long flags; | |
239 | ||
240 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
241 | if (vc->preempt_tb != TB_NIL) { | |
242 | vc->stolen_tb += mftb() - vc->preempt_tb; | |
243 | vc->preempt_tb = TB_NIL; | |
244 | } | |
245 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
246 | } | |
247 | ||
3a167bea | 248 | static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu) |
de56a948 | 249 | { |
0456ec4f | 250 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 251 | unsigned long flags; |
0456ec4f | 252 | |
2711e248 PM |
253 | /* |
254 | * We can test vc->runner without taking the vcore lock, | |
255 | * because only this task ever sets vc->runner to this | |
256 | * vcpu, and once it is set to this vcpu, only this task | |
257 | * ever sets it to NULL. | |
258 | */ | |
ec257165 PM |
259 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
260 | kvmppc_core_end_stolen(vc); | |
261 | ||
2711e248 | 262 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
c7b67670 PM |
263 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && |
264 | vcpu->arch.busy_preempt != TB_NIL) { | |
265 | vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt; | |
266 | vcpu->arch.busy_preempt = TB_NIL; | |
267 | } | |
bf3d32e1 | 268 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
269 | } |
270 | ||
3a167bea | 271 | static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu) |
de56a948 | 272 | { |
0456ec4f | 273 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 274 | unsigned long flags; |
0456ec4f | 275 | |
ec257165 PM |
276 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
277 | kvmppc_core_start_stolen(vc); | |
278 | ||
2711e248 | 279 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
c7b67670 PM |
280 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
281 | vcpu->arch.busy_preempt = mftb(); | |
bf3d32e1 | 282 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
283 | } |
284 | ||
3a167bea | 285 | static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr) |
de56a948 | 286 | { |
c20875a3 PM |
287 | /* |
288 | * Check for illegal transactional state bit combination | |
289 | * and if we find it, force the TS field to a safe state. | |
290 | */ | |
291 | if ((msr & MSR_TS_MASK) == MSR_TS_MASK) | |
292 | msr &= ~MSR_TS_MASK; | |
de56a948 | 293 | vcpu->arch.shregs.msr = msr; |
19ccb76a | 294 | kvmppc_end_cede(vcpu); |
de56a948 PM |
295 | } |
296 | ||
5358a963 | 297 | static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) |
de56a948 PM |
298 | { |
299 | vcpu->arch.pvr = pvr; | |
300 | } | |
301 | ||
2ee13be3 SJS |
302 | /* Dummy value used in computing PCR value below */ |
303 | #define PCR_ARCH_300 (PCR_ARCH_207 << 1) | |
304 | ||
5358a963 | 305 | static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) |
388cc6e1 | 306 | { |
2ee13be3 | 307 | unsigned long host_pcr_bit = 0, guest_pcr_bit = 0; |
388cc6e1 PM |
308 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
309 | ||
2ee13be3 SJS |
310 | /* We can (emulate) our own architecture version and anything older */ |
311 | if (cpu_has_feature(CPU_FTR_ARCH_300)) | |
312 | host_pcr_bit = PCR_ARCH_300; | |
313 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
314 | host_pcr_bit = PCR_ARCH_207; | |
315 | else if (cpu_has_feature(CPU_FTR_ARCH_206)) | |
316 | host_pcr_bit = PCR_ARCH_206; | |
317 | else | |
318 | host_pcr_bit = PCR_ARCH_205; | |
319 | ||
320 | /* Determine lowest PCR bit needed to run guest in given PVR level */ | |
321 | guest_pcr_bit = host_pcr_bit; | |
388cc6e1 | 322 | if (arch_compat) { |
388cc6e1 PM |
323 | switch (arch_compat) { |
324 | case PVR_ARCH_205: | |
2ee13be3 | 325 | guest_pcr_bit = PCR_ARCH_205; |
388cc6e1 PM |
326 | break; |
327 | case PVR_ARCH_206: | |
328 | case PVR_ARCH_206p: | |
2ee13be3 | 329 | guest_pcr_bit = PCR_ARCH_206; |
5557ae0e PM |
330 | break; |
331 | case PVR_ARCH_207: | |
2ee13be3 SJS |
332 | guest_pcr_bit = PCR_ARCH_207; |
333 | break; | |
334 | case PVR_ARCH_300: | |
335 | guest_pcr_bit = PCR_ARCH_300; | |
388cc6e1 PM |
336 | break; |
337 | default: | |
338 | return -EINVAL; | |
339 | } | |
340 | } | |
341 | ||
2ee13be3 SJS |
342 | /* Check requested PCR bits don't exceed our capabilities */ |
343 | if (guest_pcr_bit > host_pcr_bit) | |
344 | return -EINVAL; | |
345 | ||
388cc6e1 PM |
346 | spin_lock(&vc->lock); |
347 | vc->arch_compat = arch_compat; | |
2ee13be3 SJS |
348 | /* Set all PCR bits for which guest_pcr_bit <= bit < host_pcr_bit */ |
349 | vc->pcr = host_pcr_bit - guest_pcr_bit; | |
388cc6e1 PM |
350 | spin_unlock(&vc->lock); |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
5358a963 | 355 | static void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
de56a948 PM |
356 | { |
357 | int r; | |
358 | ||
359 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); | |
360 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", | |
361 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); | |
362 | for (r = 0; r < 16; ++r) | |
363 | pr_err("r%2d = %.16lx r%d = %.16lx\n", | |
364 | r, kvmppc_get_gpr(vcpu, r), | |
365 | r+16, kvmppc_get_gpr(vcpu, r+16)); | |
366 | pr_err("ctr = %.16lx lr = %.16lx\n", | |
367 | vcpu->arch.ctr, vcpu->arch.lr); | |
368 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", | |
369 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); | |
370 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", | |
371 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); | |
372 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", | |
373 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); | |
374 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", | |
375 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); | |
376 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); | |
377 | pr_err("fault dar = %.16lx dsisr = %.8x\n", | |
378 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
379 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); | |
380 | for (r = 0; r < vcpu->arch.slb_max; ++r) | |
381 | pr_err(" ESID = %.16llx VSID = %.16llx\n", | |
382 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); | |
383 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", | |
a0144e2a | 384 | vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, |
de56a948 PM |
385 | vcpu->arch.last_inst); |
386 | } | |
387 | ||
5358a963 | 388 | static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
a8606e20 | 389 | { |
e09fefde | 390 | struct kvm_vcpu *ret; |
a8606e20 PM |
391 | |
392 | mutex_lock(&kvm->lock); | |
e09fefde | 393 | ret = kvm_get_vcpu_by_id(kvm, id); |
a8606e20 PM |
394 | mutex_unlock(&kvm->lock); |
395 | return ret; | |
396 | } | |
397 | ||
398 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) | |
399 | { | |
f13c13a0 | 400 | vpa->__old_status |= LPPACA_OLD_SHARED_PROC; |
02407552 | 401 | vpa->yield_count = cpu_to_be32(1); |
a8606e20 PM |
402 | } |
403 | ||
55b665b0 PM |
404 | static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, |
405 | unsigned long addr, unsigned long len) | |
406 | { | |
407 | /* check address is cacheline aligned */ | |
408 | if (addr & (L1_CACHE_BYTES - 1)) | |
409 | return -EINVAL; | |
410 | spin_lock(&vcpu->arch.vpa_update_lock); | |
411 | if (v->next_gpa != addr || v->len != len) { | |
412 | v->next_gpa = addr; | |
413 | v->len = addr ? len : 0; | |
414 | v->update_pending = 1; | |
415 | } | |
416 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
417 | return 0; | |
418 | } | |
419 | ||
2e25aa5f PM |
420 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
421 | struct reg_vpa { | |
422 | u32 dummy; | |
423 | union { | |
02407552 AG |
424 | __be16 hword; |
425 | __be32 word; | |
2e25aa5f PM |
426 | } length; |
427 | }; | |
428 | ||
429 | static int vpa_is_registered(struct kvmppc_vpa *vpap) | |
430 | { | |
431 | if (vpap->update_pending) | |
432 | return vpap->next_gpa != 0; | |
433 | return vpap->pinned_addr != NULL; | |
434 | } | |
435 | ||
a8606e20 PM |
436 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
437 | unsigned long flags, | |
438 | unsigned long vcpuid, unsigned long vpa) | |
439 | { | |
440 | struct kvm *kvm = vcpu->kvm; | |
93e60249 | 441 | unsigned long len, nb; |
a8606e20 PM |
442 | void *va; |
443 | struct kvm_vcpu *tvcpu; | |
2e25aa5f PM |
444 | int err; |
445 | int subfunc; | |
446 | struct kvmppc_vpa *vpap; | |
a8606e20 PM |
447 | |
448 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); | |
449 | if (!tvcpu) | |
450 | return H_PARAMETER; | |
451 | ||
2e25aa5f PM |
452 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
453 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || | |
454 | subfunc == H_VPA_REG_SLB) { | |
455 | /* Registering new area - address must be cache-line aligned */ | |
456 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) | |
a8606e20 | 457 | return H_PARAMETER; |
2e25aa5f PM |
458 | |
459 | /* convert logical addr to kernel addr and read length */ | |
93e60249 PM |
460 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
461 | if (va == NULL) | |
b2b2f165 | 462 | return H_PARAMETER; |
2e25aa5f | 463 | if (subfunc == H_VPA_REG_VPA) |
02407552 | 464 | len = be16_to_cpu(((struct reg_vpa *)va)->length.hword); |
a8606e20 | 465 | else |
02407552 | 466 | len = be32_to_cpu(((struct reg_vpa *)va)->length.word); |
c35635ef | 467 | kvmppc_unpin_guest_page(kvm, va, vpa, false); |
2e25aa5f PM |
468 | |
469 | /* Check length */ | |
470 | if (len > nb || len < sizeof(struct reg_vpa)) | |
471 | return H_PARAMETER; | |
472 | } else { | |
473 | vpa = 0; | |
474 | len = 0; | |
475 | } | |
476 | ||
477 | err = H_PARAMETER; | |
478 | vpap = NULL; | |
479 | spin_lock(&tvcpu->arch.vpa_update_lock); | |
480 | ||
481 | switch (subfunc) { | |
482 | case H_VPA_REG_VPA: /* register VPA */ | |
483 | if (len < sizeof(struct lppaca)) | |
a8606e20 | 484 | break; |
2e25aa5f PM |
485 | vpap = &tvcpu->arch.vpa; |
486 | err = 0; | |
487 | break; | |
488 | ||
489 | case H_VPA_REG_DTL: /* register DTL */ | |
490 | if (len < sizeof(struct dtl_entry)) | |
a8606e20 | 491 | break; |
2e25aa5f PM |
492 | len -= len % sizeof(struct dtl_entry); |
493 | ||
494 | /* Check that they have previously registered a VPA */ | |
495 | err = H_RESOURCE; | |
496 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 497 | break; |
2e25aa5f PM |
498 | |
499 | vpap = &tvcpu->arch.dtl; | |
500 | err = 0; | |
501 | break; | |
502 | ||
503 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ | |
504 | /* Check that they have previously registered a VPA */ | |
505 | err = H_RESOURCE; | |
506 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 507 | break; |
2e25aa5f PM |
508 | |
509 | vpap = &tvcpu->arch.slb_shadow; | |
510 | err = 0; | |
511 | break; | |
512 | ||
513 | case H_VPA_DEREG_VPA: /* deregister VPA */ | |
514 | /* Check they don't still have a DTL or SLB buf registered */ | |
515 | err = H_RESOURCE; | |
516 | if (vpa_is_registered(&tvcpu->arch.dtl) || | |
517 | vpa_is_registered(&tvcpu->arch.slb_shadow)) | |
a8606e20 | 518 | break; |
2e25aa5f PM |
519 | |
520 | vpap = &tvcpu->arch.vpa; | |
521 | err = 0; | |
522 | break; | |
523 | ||
524 | case H_VPA_DEREG_DTL: /* deregister DTL */ | |
525 | vpap = &tvcpu->arch.dtl; | |
526 | err = 0; | |
527 | break; | |
528 | ||
529 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ | |
530 | vpap = &tvcpu->arch.slb_shadow; | |
531 | err = 0; | |
532 | break; | |
533 | } | |
534 | ||
535 | if (vpap) { | |
536 | vpap->next_gpa = vpa; | |
537 | vpap->len = len; | |
538 | vpap->update_pending = 1; | |
a8606e20 | 539 | } |
93e60249 | 540 | |
2e25aa5f PM |
541 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
542 | ||
93e60249 | 543 | return err; |
a8606e20 PM |
544 | } |
545 | ||
081f323b | 546 | static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap) |
2e25aa5f | 547 | { |
081f323b | 548 | struct kvm *kvm = vcpu->kvm; |
2e25aa5f PM |
549 | void *va; |
550 | unsigned long nb; | |
081f323b | 551 | unsigned long gpa; |
2e25aa5f | 552 | |
081f323b PM |
553 | /* |
554 | * We need to pin the page pointed to by vpap->next_gpa, | |
555 | * but we can't call kvmppc_pin_guest_page under the lock | |
556 | * as it does get_user_pages() and down_read(). So we | |
557 | * have to drop the lock, pin the page, then get the lock | |
558 | * again and check that a new area didn't get registered | |
559 | * in the meantime. | |
560 | */ | |
561 | for (;;) { | |
562 | gpa = vpap->next_gpa; | |
563 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
564 | va = NULL; | |
565 | nb = 0; | |
566 | if (gpa) | |
c35635ef | 567 | va = kvmppc_pin_guest_page(kvm, gpa, &nb); |
081f323b PM |
568 | spin_lock(&vcpu->arch.vpa_update_lock); |
569 | if (gpa == vpap->next_gpa) | |
570 | break; | |
571 | /* sigh... unpin that one and try again */ | |
572 | if (va) | |
c35635ef | 573 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b PM |
574 | } |
575 | ||
576 | vpap->update_pending = 0; | |
577 | if (va && nb < vpap->len) { | |
578 | /* | |
579 | * If it's now too short, it must be that userspace | |
580 | * has changed the mappings underlying guest memory, | |
581 | * so unregister the region. | |
582 | */ | |
c35635ef | 583 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b | 584 | va = NULL; |
2e25aa5f PM |
585 | } |
586 | if (vpap->pinned_addr) | |
c35635ef PM |
587 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa, |
588 | vpap->dirty); | |
589 | vpap->gpa = gpa; | |
2e25aa5f | 590 | vpap->pinned_addr = va; |
c35635ef | 591 | vpap->dirty = false; |
2e25aa5f PM |
592 | if (va) |
593 | vpap->pinned_end = va + vpap->len; | |
594 | } | |
595 | ||
596 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) | |
597 | { | |
2f12f034 PM |
598 | if (!(vcpu->arch.vpa.update_pending || |
599 | vcpu->arch.slb_shadow.update_pending || | |
600 | vcpu->arch.dtl.update_pending)) | |
601 | return; | |
602 | ||
2e25aa5f PM |
603 | spin_lock(&vcpu->arch.vpa_update_lock); |
604 | if (vcpu->arch.vpa.update_pending) { | |
081f323b | 605 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); |
55b665b0 PM |
606 | if (vcpu->arch.vpa.pinned_addr) |
607 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); | |
2e25aa5f PM |
608 | } |
609 | if (vcpu->arch.dtl.update_pending) { | |
081f323b | 610 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); |
2e25aa5f PM |
611 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
612 | vcpu->arch.dtl_index = 0; | |
613 | } | |
614 | if (vcpu->arch.slb_shadow.update_pending) | |
081f323b | 615 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); |
2e25aa5f PM |
616 | spin_unlock(&vcpu->arch.vpa_update_lock); |
617 | } | |
618 | ||
c7b67670 PM |
619 | /* |
620 | * Return the accumulated stolen time for the vcore up until `now'. | |
621 | * The caller should hold the vcore lock. | |
622 | */ | |
623 | static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) | |
624 | { | |
625 | u64 p; | |
2711e248 | 626 | unsigned long flags; |
c7b67670 | 627 | |
2711e248 PM |
628 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
629 | p = vc->stolen_tb; | |
c7b67670 | 630 | if (vc->vcore_state != VCORE_INACTIVE && |
2711e248 PM |
631 | vc->preempt_tb != TB_NIL) |
632 | p += now - vc->preempt_tb; | |
633 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
c7b67670 PM |
634 | return p; |
635 | } | |
636 | ||
0456ec4f PM |
637 | static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
638 | struct kvmppc_vcore *vc) | |
639 | { | |
640 | struct dtl_entry *dt; | |
641 | struct lppaca *vpa; | |
c7b67670 PM |
642 | unsigned long stolen; |
643 | unsigned long core_stolen; | |
644 | u64 now; | |
0456ec4f PM |
645 | |
646 | dt = vcpu->arch.dtl_ptr; | |
647 | vpa = vcpu->arch.vpa.pinned_addr; | |
c7b67670 PM |
648 | now = mftb(); |
649 | core_stolen = vcore_stolen_time(vc, now); | |
650 | stolen = core_stolen - vcpu->arch.stolen_logged; | |
651 | vcpu->arch.stolen_logged = core_stolen; | |
bf3d32e1 | 652 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
653 | stolen += vcpu->arch.busy_stolen; |
654 | vcpu->arch.busy_stolen = 0; | |
bf3d32e1 | 655 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
0456ec4f PM |
656 | if (!dt || !vpa) |
657 | return; | |
658 | memset(dt, 0, sizeof(struct dtl_entry)); | |
659 | dt->dispatch_reason = 7; | |
02407552 AG |
660 | dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid); |
661 | dt->timebase = cpu_to_be64(now + vc->tb_offset); | |
662 | dt->enqueue_to_dispatch_time = cpu_to_be32(stolen); | |
663 | dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu)); | |
664 | dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr); | |
0456ec4f PM |
665 | ++dt; |
666 | if (dt == vcpu->arch.dtl.pinned_end) | |
667 | dt = vcpu->arch.dtl.pinned_addr; | |
668 | vcpu->arch.dtl_ptr = dt; | |
669 | /* order writing *dt vs. writing vpa->dtl_idx */ | |
670 | smp_wmb(); | |
02407552 | 671 | vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index); |
c35635ef | 672 | vcpu->arch.dtl.dirty = true; |
0456ec4f PM |
673 | } |
674 | ||
9642382e MN |
675 | static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu) |
676 | { | |
677 | if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207) | |
678 | return true; | |
679 | if ((!vcpu->arch.vcore->arch_compat) && | |
680 | cpu_has_feature(CPU_FTR_ARCH_207S)) | |
681 | return true; | |
682 | return false; | |
683 | } | |
684 | ||
685 | static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, | |
686 | unsigned long resource, unsigned long value1, | |
687 | unsigned long value2) | |
688 | { | |
689 | switch (resource) { | |
690 | case H_SET_MODE_RESOURCE_SET_CIABR: | |
691 | if (!kvmppc_power8_compatible(vcpu)) | |
692 | return H_P2; | |
693 | if (value2) | |
694 | return H_P4; | |
695 | if (mflags) | |
696 | return H_UNSUPPORTED_FLAG_START; | |
697 | /* Guests can't breakpoint the hypervisor */ | |
698 | if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
699 | return H_P3; | |
700 | vcpu->arch.ciabr = value1; | |
701 | return H_SUCCESS; | |
702 | case H_SET_MODE_RESOURCE_SET_DAWR: | |
703 | if (!kvmppc_power8_compatible(vcpu)) | |
704 | return H_P2; | |
705 | if (mflags) | |
706 | return H_UNSUPPORTED_FLAG_START; | |
707 | if (value2 & DABRX_HYP) | |
708 | return H_P4; | |
709 | vcpu->arch.dawr = value1; | |
710 | vcpu->arch.dawrx = value2; | |
711 | return H_SUCCESS; | |
712 | default: | |
713 | return H_TOO_HARD; | |
714 | } | |
715 | } | |
716 | ||
90fd09f8 SB |
717 | static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target) |
718 | { | |
719 | struct kvmppc_vcore *vcore = target->arch.vcore; | |
720 | ||
721 | /* | |
722 | * We expect to have been called by the real mode handler | |
723 | * (kvmppc_rm_h_confer()) which would have directly returned | |
724 | * H_SUCCESS if the source vcore wasn't idle (e.g. if it may | |
725 | * have useful work to do and should not confer) so we don't | |
726 | * recheck that here. | |
727 | */ | |
728 | ||
729 | spin_lock(&vcore->lock); | |
730 | if (target->arch.state == KVMPPC_VCPU_RUNNABLE && | |
ec257165 PM |
731 | vcore->vcore_state != VCORE_INACTIVE && |
732 | vcore->runner) | |
90fd09f8 SB |
733 | target = vcore->runner; |
734 | spin_unlock(&vcore->lock); | |
735 | ||
736 | return kvm_vcpu_yield_to(target); | |
737 | } | |
738 | ||
739 | static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu) | |
740 | { | |
741 | int yield_count = 0; | |
742 | struct lppaca *lppaca; | |
743 | ||
744 | spin_lock(&vcpu->arch.vpa_update_lock); | |
745 | lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr; | |
746 | if (lppaca) | |
ecb6d618 | 747 | yield_count = be32_to_cpu(lppaca->yield_count); |
90fd09f8 SB |
748 | spin_unlock(&vcpu->arch.vpa_update_lock); |
749 | return yield_count; | |
750 | } | |
751 | ||
a8606e20 PM |
752 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
753 | { | |
754 | unsigned long req = kvmppc_get_gpr(vcpu, 3); | |
755 | unsigned long target, ret = H_SUCCESS; | |
90fd09f8 | 756 | int yield_count; |
a8606e20 | 757 | struct kvm_vcpu *tvcpu; |
8e591cb7 | 758 | int idx, rc; |
a8606e20 | 759 | |
699a0ea0 PM |
760 | if (req <= MAX_HCALL_OPCODE && |
761 | !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls)) | |
762 | return RESUME_HOST; | |
763 | ||
a8606e20 PM |
764 | switch (req) { |
765 | case H_CEDE: | |
a8606e20 PM |
766 | break; |
767 | case H_PROD: | |
768 | target = kvmppc_get_gpr(vcpu, 4); | |
769 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
770 | if (!tvcpu) { | |
771 | ret = H_PARAMETER; | |
772 | break; | |
773 | } | |
774 | tvcpu->arch.prodded = 1; | |
775 | smp_mb(); | |
776 | if (vcpu->arch.ceded) { | |
8577370f MT |
777 | if (swait_active(&vcpu->wq)) { |
778 | swake_up(&vcpu->wq); | |
a8606e20 PM |
779 | vcpu->stat.halt_wakeup++; |
780 | } | |
781 | } | |
782 | break; | |
783 | case H_CONFER: | |
42d7604d PM |
784 | target = kvmppc_get_gpr(vcpu, 4); |
785 | if (target == -1) | |
786 | break; | |
787 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
788 | if (!tvcpu) { | |
789 | ret = H_PARAMETER; | |
790 | break; | |
791 | } | |
90fd09f8 SB |
792 | yield_count = kvmppc_get_gpr(vcpu, 5); |
793 | if (kvmppc_get_yield_count(tvcpu) != yield_count) | |
794 | break; | |
795 | kvm_arch_vcpu_yield_to(tvcpu); | |
a8606e20 PM |
796 | break; |
797 | case H_REGISTER_VPA: | |
798 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), | |
799 | kvmppc_get_gpr(vcpu, 5), | |
800 | kvmppc_get_gpr(vcpu, 6)); | |
801 | break; | |
8e591cb7 ME |
802 | case H_RTAS: |
803 | if (list_empty(&vcpu->kvm->arch.rtas_tokens)) | |
804 | return RESUME_HOST; | |
805 | ||
c9438092 | 806 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
8e591cb7 | 807 | rc = kvmppc_rtas_hcall(vcpu); |
c9438092 | 808 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8e591cb7 ME |
809 | |
810 | if (rc == -ENOENT) | |
811 | return RESUME_HOST; | |
812 | else if (rc == 0) | |
813 | break; | |
814 | ||
815 | /* Send the error out to userspace via KVM_RUN */ | |
816 | return rc; | |
99342cf8 DG |
817 | case H_LOGICAL_CI_LOAD: |
818 | ret = kvmppc_h_logical_ci_load(vcpu); | |
819 | if (ret == H_TOO_HARD) | |
820 | return RESUME_HOST; | |
821 | break; | |
822 | case H_LOGICAL_CI_STORE: | |
823 | ret = kvmppc_h_logical_ci_store(vcpu); | |
824 | if (ret == H_TOO_HARD) | |
825 | return RESUME_HOST; | |
826 | break; | |
9642382e MN |
827 | case H_SET_MODE: |
828 | ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4), | |
829 | kvmppc_get_gpr(vcpu, 5), | |
830 | kvmppc_get_gpr(vcpu, 6), | |
831 | kvmppc_get_gpr(vcpu, 7)); | |
832 | if (ret == H_TOO_HARD) | |
833 | return RESUME_HOST; | |
834 | break; | |
bc5ad3f3 BH |
835 | case H_XIRR: |
836 | case H_CPPR: | |
837 | case H_EOI: | |
838 | case H_IPI: | |
8e44ddc3 PM |
839 | case H_IPOLL: |
840 | case H_XIRR_X: | |
bc5ad3f3 BH |
841 | if (kvmppc_xics_enabled(vcpu)) { |
842 | ret = kvmppc_xics_hcall(vcpu, req); | |
843 | break; | |
d3695aa4 AK |
844 | } |
845 | return RESUME_HOST; | |
846 | case H_PUT_TCE: | |
847 | ret = kvmppc_h_put_tce(vcpu, kvmppc_get_gpr(vcpu, 4), | |
848 | kvmppc_get_gpr(vcpu, 5), | |
849 | kvmppc_get_gpr(vcpu, 6)); | |
850 | if (ret == H_TOO_HARD) | |
851 | return RESUME_HOST; | |
852 | break; | |
853 | case H_PUT_TCE_INDIRECT: | |
854 | ret = kvmppc_h_put_tce_indirect(vcpu, kvmppc_get_gpr(vcpu, 4), | |
855 | kvmppc_get_gpr(vcpu, 5), | |
856 | kvmppc_get_gpr(vcpu, 6), | |
857 | kvmppc_get_gpr(vcpu, 7)); | |
858 | if (ret == H_TOO_HARD) | |
859 | return RESUME_HOST; | |
860 | break; | |
861 | case H_STUFF_TCE: | |
862 | ret = kvmppc_h_stuff_tce(vcpu, kvmppc_get_gpr(vcpu, 4), | |
863 | kvmppc_get_gpr(vcpu, 5), | |
864 | kvmppc_get_gpr(vcpu, 6), | |
865 | kvmppc_get_gpr(vcpu, 7)); | |
866 | if (ret == H_TOO_HARD) | |
867 | return RESUME_HOST; | |
868 | break; | |
a8606e20 PM |
869 | default: |
870 | return RESUME_HOST; | |
871 | } | |
872 | kvmppc_set_gpr(vcpu, 3, ret); | |
873 | vcpu->arch.hcall_needed = 0; | |
874 | return RESUME_GUEST; | |
875 | } | |
876 | ||
ae2113a4 PM |
877 | static int kvmppc_hcall_impl_hv(unsigned long cmd) |
878 | { | |
879 | switch (cmd) { | |
880 | case H_CEDE: | |
881 | case H_PROD: | |
882 | case H_CONFER: | |
883 | case H_REGISTER_VPA: | |
9642382e | 884 | case H_SET_MODE: |
99342cf8 DG |
885 | case H_LOGICAL_CI_LOAD: |
886 | case H_LOGICAL_CI_STORE: | |
ae2113a4 PM |
887 | #ifdef CONFIG_KVM_XICS |
888 | case H_XIRR: | |
889 | case H_CPPR: | |
890 | case H_EOI: | |
891 | case H_IPI: | |
892 | case H_IPOLL: | |
893 | case H_XIRR_X: | |
894 | #endif | |
895 | return 1; | |
896 | } | |
897 | ||
898 | /* See if it's in the real-mode table */ | |
899 | return kvmppc_hcall_impl_hv_realmode(cmd); | |
900 | } | |
901 | ||
a59c1d9e MS |
902 | static int kvmppc_emulate_debug_inst(struct kvm_run *run, |
903 | struct kvm_vcpu *vcpu) | |
904 | { | |
905 | u32 last_inst; | |
906 | ||
907 | if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) != | |
908 | EMULATE_DONE) { | |
909 | /* | |
910 | * Fetch failed, so return to guest and | |
911 | * try executing it again. | |
912 | */ | |
913 | return RESUME_GUEST; | |
914 | } | |
915 | ||
916 | if (last_inst == KVMPPC_INST_SW_BREAKPOINT) { | |
917 | run->exit_reason = KVM_EXIT_DEBUG; | |
918 | run->debug.arch.address = kvmppc_get_pc(vcpu); | |
919 | return RESUME_HOST; | |
920 | } else { | |
921 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
922 | return RESUME_GUEST; | |
923 | } | |
924 | } | |
925 | ||
3a167bea AK |
926 | static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, |
927 | struct task_struct *tsk) | |
de56a948 PM |
928 | { |
929 | int r = RESUME_HOST; | |
930 | ||
931 | vcpu->stat.sum_exits++; | |
932 | ||
1c9e3d51 PM |
933 | /* |
934 | * This can happen if an interrupt occurs in the last stages | |
935 | * of guest entry or the first stages of guest exit (i.e. after | |
936 | * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV | |
937 | * and before setting it to KVM_GUEST_MODE_HOST_HV). | |
938 | * That can happen due to a bug, or due to a machine check | |
939 | * occurring at just the wrong time. | |
940 | */ | |
941 | if (vcpu->arch.shregs.msr & MSR_HV) { | |
942 | printk(KERN_EMERG "KVM trap in HV mode!\n"); | |
943 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
944 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
945 | vcpu->arch.shregs.msr); | |
946 | kvmppc_dump_regs(vcpu); | |
947 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
948 | run->hw.hardware_exit_reason = vcpu->arch.trap; | |
949 | return RESUME_HOST; | |
950 | } | |
de56a948 PM |
951 | run->exit_reason = KVM_EXIT_UNKNOWN; |
952 | run->ready_for_interrupt_injection = 1; | |
953 | switch (vcpu->arch.trap) { | |
954 | /* We're good on these - the host merely wanted to get our attention */ | |
955 | case BOOK3S_INTERRUPT_HV_DECREMENTER: | |
956 | vcpu->stat.dec_exits++; | |
957 | r = RESUME_GUEST; | |
958 | break; | |
959 | case BOOK3S_INTERRUPT_EXTERNAL: | |
5d00f66b | 960 | case BOOK3S_INTERRUPT_H_DOORBELL: |
84f7139c | 961 | case BOOK3S_INTERRUPT_H_VIRT: |
de56a948 PM |
962 | vcpu->stat.ext_intr_exits++; |
963 | r = RESUME_GUEST; | |
964 | break; | |
dee6f24c MS |
965 | /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/ |
966 | case BOOK3S_INTERRUPT_HMI: | |
de56a948 PM |
967 | case BOOK3S_INTERRUPT_PERFMON: |
968 | r = RESUME_GUEST; | |
969 | break; | |
b4072df4 PM |
970 | case BOOK3S_INTERRUPT_MACHINE_CHECK: |
971 | /* | |
972 | * Deliver a machine check interrupt to the guest. | |
973 | * We have to do this, even if the host has handled the | |
974 | * machine check, because machine checks use SRR0/1 and | |
975 | * the interrupt might have trashed guest state in them. | |
976 | */ | |
977 | kvmppc_book3s_queue_irqprio(vcpu, | |
978 | BOOK3S_INTERRUPT_MACHINE_CHECK); | |
979 | r = RESUME_GUEST; | |
980 | break; | |
de56a948 PM |
981 | case BOOK3S_INTERRUPT_PROGRAM: |
982 | { | |
983 | ulong flags; | |
984 | /* | |
985 | * Normally program interrupts are delivered directly | |
986 | * to the guest by the hardware, but we can get here | |
987 | * as a result of a hypervisor emulation interrupt | |
988 | * (e40) getting turned into a 700 by BML RTAS. | |
989 | */ | |
990 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; | |
991 | kvmppc_core_queue_program(vcpu, flags); | |
992 | r = RESUME_GUEST; | |
993 | break; | |
994 | } | |
995 | case BOOK3S_INTERRUPT_SYSCALL: | |
996 | { | |
997 | /* hcall - punt to userspace */ | |
998 | int i; | |
999 | ||
27025a60 LPF |
1000 | /* hypercall with MSR_PR has already been handled in rmode, |
1001 | * and never reaches here. | |
1002 | */ | |
1003 | ||
de56a948 PM |
1004 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
1005 | for (i = 0; i < 9; ++i) | |
1006 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); | |
1007 | run->exit_reason = KVM_EXIT_PAPR_HCALL; | |
1008 | vcpu->arch.hcall_needed = 1; | |
1009 | r = RESUME_HOST; | |
1010 | break; | |
1011 | } | |
1012 | /* | |
342d3db7 PM |
1013 | * We get these next two if the guest accesses a page which it thinks |
1014 | * it has mapped but which is not actually present, either because | |
1015 | * it is for an emulated I/O device or because the corresonding | |
1016 | * host page has been paged out. Any other HDSI/HISI interrupts | |
1017 | * have been handled already. | |
de56a948 PM |
1018 | */ |
1019 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: | |
913d3ff9 | 1020 | r = RESUME_PAGE_FAULT; |
de56a948 PM |
1021 | break; |
1022 | case BOOK3S_INTERRUPT_H_INST_STORAGE: | |
913d3ff9 PM |
1023 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
1024 | vcpu->arch.fault_dsisr = 0; | |
1025 | r = RESUME_PAGE_FAULT; | |
de56a948 PM |
1026 | break; |
1027 | /* | |
1028 | * This occurs if the guest executes an illegal instruction. | |
a59c1d9e MS |
1029 | * If the guest debug is disabled, generate a program interrupt |
1030 | * to the guest. If guest debug is enabled, we need to check | |
1031 | * whether the instruction is a software breakpoint instruction. | |
1032 | * Accordingly return to Guest or Host. | |
de56a948 PM |
1033 | */ |
1034 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: | |
4a157d61 PM |
1035 | if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED) |
1036 | vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ? | |
1037 | swab32(vcpu->arch.emul_inst) : | |
1038 | vcpu->arch.emul_inst; | |
a59c1d9e MS |
1039 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) { |
1040 | r = kvmppc_emulate_debug_inst(run, vcpu); | |
1041 | } else { | |
1042 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
1043 | r = RESUME_GUEST; | |
1044 | } | |
bd3048b8 ME |
1045 | break; |
1046 | /* | |
1047 | * This occurs if the guest (kernel or userspace), does something that | |
1048 | * is prohibited by HFSCR. We just generate a program interrupt to | |
1049 | * the guest. | |
1050 | */ | |
1051 | case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: | |
1052 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
de56a948 PM |
1053 | r = RESUME_GUEST; |
1054 | break; | |
f7af5209 SW |
1055 | case BOOK3S_INTERRUPT_HV_RM_HARD: |
1056 | r = RESUME_PASSTHROUGH; | |
1057 | break; | |
de56a948 PM |
1058 | default: |
1059 | kvmppc_dump_regs(vcpu); | |
1060 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
1061 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
1062 | vcpu->arch.shregs.msr); | |
f3271d4c | 1063 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
de56a948 | 1064 | r = RESUME_HOST; |
de56a948 PM |
1065 | break; |
1066 | } | |
1067 | ||
de56a948 PM |
1068 | return r; |
1069 | } | |
1070 | ||
3a167bea AK |
1071 | static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu, |
1072 | struct kvm_sregs *sregs) | |
de56a948 PM |
1073 | { |
1074 | int i; | |
1075 | ||
de56a948 | 1076 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
87916442 | 1077 | sregs->pvr = vcpu->arch.pvr; |
de56a948 PM |
1078 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
1079 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; | |
1080 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; | |
1081 | } | |
1082 | ||
1083 | return 0; | |
1084 | } | |
1085 | ||
3a167bea AK |
1086 | static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, |
1087 | struct kvm_sregs *sregs) | |
de56a948 PM |
1088 | { |
1089 | int i, j; | |
1090 | ||
9333e6c4 PM |
1091 | /* Only accept the same PVR as the host's, since we can't spoof it */ |
1092 | if (sregs->pvr != vcpu->arch.pvr) | |
1093 | return -EINVAL; | |
de56a948 PM |
1094 | |
1095 | j = 0; | |
1096 | for (i = 0; i < vcpu->arch.slb_nr; i++) { | |
1097 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { | |
1098 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; | |
1099 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; | |
1100 | ++j; | |
1101 | } | |
1102 | } | |
1103 | vcpu->arch.slb_max = j; | |
1104 | ||
1105 | return 0; | |
1106 | } | |
1107 | ||
a0840240 AK |
1108 | static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr, |
1109 | bool preserve_top32) | |
a0144e2a | 1110 | { |
8f902b00 | 1111 | struct kvm *kvm = vcpu->kvm; |
a0144e2a PM |
1112 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
1113 | u64 mask; | |
1114 | ||
8f902b00 | 1115 | mutex_lock(&kvm->lock); |
a0144e2a | 1116 | spin_lock(&vc->lock); |
d682916a AB |
1117 | /* |
1118 | * If ILE (interrupt little-endian) has changed, update the | |
1119 | * MSR_LE bit in the intr_msr for each vcpu in this vcore. | |
1120 | */ | |
1121 | if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) { | |
d682916a AB |
1122 | struct kvm_vcpu *vcpu; |
1123 | int i; | |
1124 | ||
d682916a AB |
1125 | kvm_for_each_vcpu(i, vcpu, kvm) { |
1126 | if (vcpu->arch.vcore != vc) | |
1127 | continue; | |
1128 | if (new_lpcr & LPCR_ILE) | |
1129 | vcpu->arch.intr_msr |= MSR_LE; | |
1130 | else | |
1131 | vcpu->arch.intr_msr &= ~MSR_LE; | |
1132 | } | |
d682916a AB |
1133 | } |
1134 | ||
a0144e2a PM |
1135 | /* |
1136 | * Userspace can only modify DPFD (default prefetch depth), | |
1137 | * ILE (interrupt little-endian) and TC (translation control). | |
e0622bd9 | 1138 | * On POWER8 userspace can also modify AIL (alt. interrupt loc.) |
a0144e2a PM |
1139 | */ |
1140 | mask = LPCR_DPFD | LPCR_ILE | LPCR_TC; | |
e0622bd9 PM |
1141 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
1142 | mask |= LPCR_AIL; | |
a0840240 AK |
1143 | |
1144 | /* Broken 32-bit version of LPCR must not clear top bits */ | |
1145 | if (preserve_top32) | |
1146 | mask &= 0xFFFFFFFF; | |
a0144e2a PM |
1147 | vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); |
1148 | spin_unlock(&vc->lock); | |
8f902b00 | 1149 | mutex_unlock(&kvm->lock); |
a0144e2a PM |
1150 | } |
1151 | ||
3a167bea AK |
1152 | static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1153 | union kvmppc_one_reg *val) | |
31f3438e | 1154 | { |
a136a8bd PM |
1155 | int r = 0; |
1156 | long int i; | |
31f3438e | 1157 | |
a136a8bd | 1158 | switch (id) { |
a59c1d9e MS |
1159 | case KVM_REG_PPC_DEBUG_INST: |
1160 | *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); | |
1161 | break; | |
31f3438e | 1162 | case KVM_REG_PPC_HIOR: |
a136a8bd PM |
1163 | *val = get_reg_val(id, 0); |
1164 | break; | |
1165 | case KVM_REG_PPC_DABR: | |
1166 | *val = get_reg_val(id, vcpu->arch.dabr); | |
1167 | break; | |
8563bf52 PM |
1168 | case KVM_REG_PPC_DABRX: |
1169 | *val = get_reg_val(id, vcpu->arch.dabrx); | |
1170 | break; | |
a136a8bd PM |
1171 | case KVM_REG_PPC_DSCR: |
1172 | *val = get_reg_val(id, vcpu->arch.dscr); | |
1173 | break; | |
1174 | case KVM_REG_PPC_PURR: | |
1175 | *val = get_reg_val(id, vcpu->arch.purr); | |
1176 | break; | |
1177 | case KVM_REG_PPC_SPURR: | |
1178 | *val = get_reg_val(id, vcpu->arch.spurr); | |
1179 | break; | |
1180 | case KVM_REG_PPC_AMR: | |
1181 | *val = get_reg_val(id, vcpu->arch.amr); | |
1182 | break; | |
1183 | case KVM_REG_PPC_UAMOR: | |
1184 | *val = get_reg_val(id, vcpu->arch.uamor); | |
1185 | break; | |
b005255e | 1186 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1187 | i = id - KVM_REG_PPC_MMCR0; |
1188 | *val = get_reg_val(id, vcpu->arch.mmcr[i]); | |
1189 | break; | |
1190 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1191 | i = id - KVM_REG_PPC_PMC1; | |
1192 | *val = get_reg_val(id, vcpu->arch.pmc[i]); | |
31f3438e | 1193 | break; |
b005255e MN |
1194 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1195 | i = id - KVM_REG_PPC_SPMC1; | |
1196 | *val = get_reg_val(id, vcpu->arch.spmc[i]); | |
1197 | break; | |
14941789 PM |
1198 | case KVM_REG_PPC_SIAR: |
1199 | *val = get_reg_val(id, vcpu->arch.siar); | |
1200 | break; | |
1201 | case KVM_REG_PPC_SDAR: | |
1202 | *val = get_reg_val(id, vcpu->arch.sdar); | |
1203 | break; | |
b005255e MN |
1204 | case KVM_REG_PPC_SIER: |
1205 | *val = get_reg_val(id, vcpu->arch.sier); | |
a8bd19ef | 1206 | break; |
b005255e MN |
1207 | case KVM_REG_PPC_IAMR: |
1208 | *val = get_reg_val(id, vcpu->arch.iamr); | |
1209 | break; | |
b005255e MN |
1210 | case KVM_REG_PPC_PSPB: |
1211 | *val = get_reg_val(id, vcpu->arch.pspb); | |
1212 | break; | |
b005255e MN |
1213 | case KVM_REG_PPC_DPDES: |
1214 | *val = get_reg_val(id, vcpu->arch.vcore->dpdes); | |
1215 | break; | |
88b02cf9 PM |
1216 | case KVM_REG_PPC_VTB: |
1217 | *val = get_reg_val(id, vcpu->arch.vcore->vtb); | |
1218 | break; | |
b005255e MN |
1219 | case KVM_REG_PPC_DAWR: |
1220 | *val = get_reg_val(id, vcpu->arch.dawr); | |
1221 | break; | |
1222 | case KVM_REG_PPC_DAWRX: | |
1223 | *val = get_reg_val(id, vcpu->arch.dawrx); | |
1224 | break; | |
1225 | case KVM_REG_PPC_CIABR: | |
1226 | *val = get_reg_val(id, vcpu->arch.ciabr); | |
1227 | break; | |
b005255e MN |
1228 | case KVM_REG_PPC_CSIGR: |
1229 | *val = get_reg_val(id, vcpu->arch.csigr); | |
1230 | break; | |
1231 | case KVM_REG_PPC_TACR: | |
1232 | *val = get_reg_val(id, vcpu->arch.tacr); | |
1233 | break; | |
1234 | case KVM_REG_PPC_TCSCR: | |
1235 | *val = get_reg_val(id, vcpu->arch.tcscr); | |
1236 | break; | |
1237 | case KVM_REG_PPC_PID: | |
1238 | *val = get_reg_val(id, vcpu->arch.pid); | |
1239 | break; | |
1240 | case KVM_REG_PPC_ACOP: | |
1241 | *val = get_reg_val(id, vcpu->arch.acop); | |
1242 | break; | |
1243 | case KVM_REG_PPC_WORT: | |
1244 | *val = get_reg_val(id, vcpu->arch.wort); | |
a8bd19ef | 1245 | break; |
e9cf1e08 PM |
1246 | case KVM_REG_PPC_TIDR: |
1247 | *val = get_reg_val(id, vcpu->arch.tid); | |
1248 | break; | |
1249 | case KVM_REG_PPC_PSSCR: | |
1250 | *val = get_reg_val(id, vcpu->arch.psscr); | |
1251 | break; | |
55b665b0 PM |
1252 | case KVM_REG_PPC_VPA_ADDR: |
1253 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1254 | *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); | |
1255 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1256 | break; | |
1257 | case KVM_REG_PPC_VPA_SLB: | |
1258 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1259 | val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; | |
1260 | val->vpaval.length = vcpu->arch.slb_shadow.len; | |
1261 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1262 | break; | |
1263 | case KVM_REG_PPC_VPA_DTL: | |
1264 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1265 | val->vpaval.addr = vcpu->arch.dtl.next_gpa; | |
1266 | val->vpaval.length = vcpu->arch.dtl.len; | |
1267 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1268 | break; | |
93b0f4dc PM |
1269 | case KVM_REG_PPC_TB_OFFSET: |
1270 | *val = get_reg_val(id, vcpu->arch.vcore->tb_offset); | |
1271 | break; | |
a0144e2a | 1272 | case KVM_REG_PPC_LPCR: |
a0840240 | 1273 | case KVM_REG_PPC_LPCR_64: |
a0144e2a PM |
1274 | *val = get_reg_val(id, vcpu->arch.vcore->lpcr); |
1275 | break; | |
4b8473c9 PM |
1276 | case KVM_REG_PPC_PPR: |
1277 | *val = get_reg_val(id, vcpu->arch.ppr); | |
1278 | break; | |
a7d80d01 MN |
1279 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1280 | case KVM_REG_PPC_TFHAR: | |
1281 | *val = get_reg_val(id, vcpu->arch.tfhar); | |
1282 | break; | |
1283 | case KVM_REG_PPC_TFIAR: | |
1284 | *val = get_reg_val(id, vcpu->arch.tfiar); | |
1285 | break; | |
1286 | case KVM_REG_PPC_TEXASR: | |
1287 | *val = get_reg_val(id, vcpu->arch.texasr); | |
1288 | break; | |
1289 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1290 | i = id - KVM_REG_PPC_TM_GPR0; | |
1291 | *val = get_reg_val(id, vcpu->arch.gpr_tm[i]); | |
1292 | break; | |
1293 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1294 | { | |
1295 | int j; | |
1296 | i = id - KVM_REG_PPC_TM_VSR0; | |
1297 | if (i < 32) | |
1298 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1299 | val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j]; | |
1300 | else { | |
1301 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1302 | val->vval = vcpu->arch.vr_tm.vr[i-32]; | |
1303 | else | |
1304 | r = -ENXIO; | |
1305 | } | |
1306 | break; | |
1307 | } | |
1308 | case KVM_REG_PPC_TM_CR: | |
1309 | *val = get_reg_val(id, vcpu->arch.cr_tm); | |
1310 | break; | |
0d808df0 PM |
1311 | case KVM_REG_PPC_TM_XER: |
1312 | *val = get_reg_val(id, vcpu->arch.xer_tm); | |
1313 | break; | |
a7d80d01 MN |
1314 | case KVM_REG_PPC_TM_LR: |
1315 | *val = get_reg_val(id, vcpu->arch.lr_tm); | |
1316 | break; | |
1317 | case KVM_REG_PPC_TM_CTR: | |
1318 | *val = get_reg_val(id, vcpu->arch.ctr_tm); | |
1319 | break; | |
1320 | case KVM_REG_PPC_TM_FPSCR: | |
1321 | *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr); | |
1322 | break; | |
1323 | case KVM_REG_PPC_TM_AMR: | |
1324 | *val = get_reg_val(id, vcpu->arch.amr_tm); | |
1325 | break; | |
1326 | case KVM_REG_PPC_TM_PPR: | |
1327 | *val = get_reg_val(id, vcpu->arch.ppr_tm); | |
1328 | break; | |
1329 | case KVM_REG_PPC_TM_VRSAVE: | |
1330 | *val = get_reg_val(id, vcpu->arch.vrsave_tm); | |
1331 | break; | |
1332 | case KVM_REG_PPC_TM_VSCR: | |
1333 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1334 | *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]); | |
1335 | else | |
1336 | r = -ENXIO; | |
1337 | break; | |
1338 | case KVM_REG_PPC_TM_DSCR: | |
1339 | *val = get_reg_val(id, vcpu->arch.dscr_tm); | |
1340 | break; | |
1341 | case KVM_REG_PPC_TM_TAR: | |
1342 | *val = get_reg_val(id, vcpu->arch.tar_tm); | |
1343 | break; | |
1344 | #endif | |
388cc6e1 PM |
1345 | case KVM_REG_PPC_ARCH_COMPAT: |
1346 | *val = get_reg_val(id, vcpu->arch.vcore->arch_compat); | |
1347 | break; | |
31f3438e | 1348 | default: |
a136a8bd | 1349 | r = -EINVAL; |
31f3438e PM |
1350 | break; |
1351 | } | |
1352 | ||
1353 | return r; | |
1354 | } | |
1355 | ||
3a167bea AK |
1356 | static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1357 | union kvmppc_one_reg *val) | |
31f3438e | 1358 | { |
a136a8bd PM |
1359 | int r = 0; |
1360 | long int i; | |
55b665b0 | 1361 | unsigned long addr, len; |
31f3438e | 1362 | |
a136a8bd | 1363 | switch (id) { |
31f3438e | 1364 | case KVM_REG_PPC_HIOR: |
31f3438e | 1365 | /* Only allow this to be set to zero */ |
a136a8bd | 1366 | if (set_reg_val(id, *val)) |
31f3438e PM |
1367 | r = -EINVAL; |
1368 | break; | |
a136a8bd PM |
1369 | case KVM_REG_PPC_DABR: |
1370 | vcpu->arch.dabr = set_reg_val(id, *val); | |
1371 | break; | |
8563bf52 PM |
1372 | case KVM_REG_PPC_DABRX: |
1373 | vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP; | |
1374 | break; | |
a136a8bd PM |
1375 | case KVM_REG_PPC_DSCR: |
1376 | vcpu->arch.dscr = set_reg_val(id, *val); | |
1377 | break; | |
1378 | case KVM_REG_PPC_PURR: | |
1379 | vcpu->arch.purr = set_reg_val(id, *val); | |
1380 | break; | |
1381 | case KVM_REG_PPC_SPURR: | |
1382 | vcpu->arch.spurr = set_reg_val(id, *val); | |
1383 | break; | |
1384 | case KVM_REG_PPC_AMR: | |
1385 | vcpu->arch.amr = set_reg_val(id, *val); | |
1386 | break; | |
1387 | case KVM_REG_PPC_UAMOR: | |
1388 | vcpu->arch.uamor = set_reg_val(id, *val); | |
1389 | break; | |
b005255e | 1390 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1391 | i = id - KVM_REG_PPC_MMCR0; |
1392 | vcpu->arch.mmcr[i] = set_reg_val(id, *val); | |
1393 | break; | |
1394 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1395 | i = id - KVM_REG_PPC_PMC1; | |
1396 | vcpu->arch.pmc[i] = set_reg_val(id, *val); | |
1397 | break; | |
b005255e MN |
1398 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1399 | i = id - KVM_REG_PPC_SPMC1; | |
1400 | vcpu->arch.spmc[i] = set_reg_val(id, *val); | |
1401 | break; | |
14941789 PM |
1402 | case KVM_REG_PPC_SIAR: |
1403 | vcpu->arch.siar = set_reg_val(id, *val); | |
1404 | break; | |
1405 | case KVM_REG_PPC_SDAR: | |
1406 | vcpu->arch.sdar = set_reg_val(id, *val); | |
1407 | break; | |
b005255e MN |
1408 | case KVM_REG_PPC_SIER: |
1409 | vcpu->arch.sier = set_reg_val(id, *val); | |
a8bd19ef | 1410 | break; |
b005255e MN |
1411 | case KVM_REG_PPC_IAMR: |
1412 | vcpu->arch.iamr = set_reg_val(id, *val); | |
1413 | break; | |
b005255e MN |
1414 | case KVM_REG_PPC_PSPB: |
1415 | vcpu->arch.pspb = set_reg_val(id, *val); | |
1416 | break; | |
b005255e MN |
1417 | case KVM_REG_PPC_DPDES: |
1418 | vcpu->arch.vcore->dpdes = set_reg_val(id, *val); | |
1419 | break; | |
88b02cf9 PM |
1420 | case KVM_REG_PPC_VTB: |
1421 | vcpu->arch.vcore->vtb = set_reg_val(id, *val); | |
1422 | break; | |
b005255e MN |
1423 | case KVM_REG_PPC_DAWR: |
1424 | vcpu->arch.dawr = set_reg_val(id, *val); | |
1425 | break; | |
1426 | case KVM_REG_PPC_DAWRX: | |
1427 | vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP; | |
1428 | break; | |
1429 | case KVM_REG_PPC_CIABR: | |
1430 | vcpu->arch.ciabr = set_reg_val(id, *val); | |
1431 | /* Don't allow setting breakpoints in hypervisor code */ | |
1432 | if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
1433 | vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */ | |
1434 | break; | |
b005255e MN |
1435 | case KVM_REG_PPC_CSIGR: |
1436 | vcpu->arch.csigr = set_reg_val(id, *val); | |
1437 | break; | |
1438 | case KVM_REG_PPC_TACR: | |
1439 | vcpu->arch.tacr = set_reg_val(id, *val); | |
1440 | break; | |
1441 | case KVM_REG_PPC_TCSCR: | |
1442 | vcpu->arch.tcscr = set_reg_val(id, *val); | |
1443 | break; | |
1444 | case KVM_REG_PPC_PID: | |
1445 | vcpu->arch.pid = set_reg_val(id, *val); | |
1446 | break; | |
1447 | case KVM_REG_PPC_ACOP: | |
1448 | vcpu->arch.acop = set_reg_val(id, *val); | |
1449 | break; | |
1450 | case KVM_REG_PPC_WORT: | |
1451 | vcpu->arch.wort = set_reg_val(id, *val); | |
a8bd19ef | 1452 | break; |
e9cf1e08 PM |
1453 | case KVM_REG_PPC_TIDR: |
1454 | vcpu->arch.tid = set_reg_val(id, *val); | |
1455 | break; | |
1456 | case KVM_REG_PPC_PSSCR: | |
1457 | vcpu->arch.psscr = set_reg_val(id, *val) & PSSCR_GUEST_VIS; | |
1458 | break; | |
55b665b0 PM |
1459 | case KVM_REG_PPC_VPA_ADDR: |
1460 | addr = set_reg_val(id, *val); | |
1461 | r = -EINVAL; | |
1462 | if (!addr && (vcpu->arch.slb_shadow.next_gpa || | |
1463 | vcpu->arch.dtl.next_gpa)) | |
1464 | break; | |
1465 | r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); | |
1466 | break; | |
1467 | case KVM_REG_PPC_VPA_SLB: | |
1468 | addr = val->vpaval.addr; | |
1469 | len = val->vpaval.length; | |
1470 | r = -EINVAL; | |
1471 | if (addr && !vcpu->arch.vpa.next_gpa) | |
1472 | break; | |
1473 | r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); | |
1474 | break; | |
1475 | case KVM_REG_PPC_VPA_DTL: | |
1476 | addr = val->vpaval.addr; | |
1477 | len = val->vpaval.length; | |
1478 | r = -EINVAL; | |
9f8c8c78 PM |
1479 | if (addr && (len < sizeof(struct dtl_entry) || |
1480 | !vcpu->arch.vpa.next_gpa)) | |
55b665b0 PM |
1481 | break; |
1482 | len -= len % sizeof(struct dtl_entry); | |
1483 | r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); | |
1484 | break; | |
93b0f4dc PM |
1485 | case KVM_REG_PPC_TB_OFFSET: |
1486 | /* round up to multiple of 2^24 */ | |
1487 | vcpu->arch.vcore->tb_offset = | |
1488 | ALIGN(set_reg_val(id, *val), 1UL << 24); | |
1489 | break; | |
a0144e2a | 1490 | case KVM_REG_PPC_LPCR: |
a0840240 AK |
1491 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true); |
1492 | break; | |
1493 | case KVM_REG_PPC_LPCR_64: | |
1494 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false); | |
a0144e2a | 1495 | break; |
4b8473c9 PM |
1496 | case KVM_REG_PPC_PPR: |
1497 | vcpu->arch.ppr = set_reg_val(id, *val); | |
1498 | break; | |
a7d80d01 MN |
1499 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1500 | case KVM_REG_PPC_TFHAR: | |
1501 | vcpu->arch.tfhar = set_reg_val(id, *val); | |
1502 | break; | |
1503 | case KVM_REG_PPC_TFIAR: | |
1504 | vcpu->arch.tfiar = set_reg_val(id, *val); | |
1505 | break; | |
1506 | case KVM_REG_PPC_TEXASR: | |
1507 | vcpu->arch.texasr = set_reg_val(id, *val); | |
1508 | break; | |
1509 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1510 | i = id - KVM_REG_PPC_TM_GPR0; | |
1511 | vcpu->arch.gpr_tm[i] = set_reg_val(id, *val); | |
1512 | break; | |
1513 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1514 | { | |
1515 | int j; | |
1516 | i = id - KVM_REG_PPC_TM_VSR0; | |
1517 | if (i < 32) | |
1518 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1519 | vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j]; | |
1520 | else | |
1521 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1522 | vcpu->arch.vr_tm.vr[i-32] = val->vval; | |
1523 | else | |
1524 | r = -ENXIO; | |
1525 | break; | |
1526 | } | |
1527 | case KVM_REG_PPC_TM_CR: | |
1528 | vcpu->arch.cr_tm = set_reg_val(id, *val); | |
1529 | break; | |
0d808df0 PM |
1530 | case KVM_REG_PPC_TM_XER: |
1531 | vcpu->arch.xer_tm = set_reg_val(id, *val); | |
1532 | break; | |
a7d80d01 MN |
1533 | case KVM_REG_PPC_TM_LR: |
1534 | vcpu->arch.lr_tm = set_reg_val(id, *val); | |
1535 | break; | |
1536 | case KVM_REG_PPC_TM_CTR: | |
1537 | vcpu->arch.ctr_tm = set_reg_val(id, *val); | |
1538 | break; | |
1539 | case KVM_REG_PPC_TM_FPSCR: | |
1540 | vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val); | |
1541 | break; | |
1542 | case KVM_REG_PPC_TM_AMR: | |
1543 | vcpu->arch.amr_tm = set_reg_val(id, *val); | |
1544 | break; | |
1545 | case KVM_REG_PPC_TM_PPR: | |
1546 | vcpu->arch.ppr_tm = set_reg_val(id, *val); | |
1547 | break; | |
1548 | case KVM_REG_PPC_TM_VRSAVE: | |
1549 | vcpu->arch.vrsave_tm = set_reg_val(id, *val); | |
1550 | break; | |
1551 | case KVM_REG_PPC_TM_VSCR: | |
1552 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1553 | vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val); | |
1554 | else | |
1555 | r = - ENXIO; | |
1556 | break; | |
1557 | case KVM_REG_PPC_TM_DSCR: | |
1558 | vcpu->arch.dscr_tm = set_reg_val(id, *val); | |
1559 | break; | |
1560 | case KVM_REG_PPC_TM_TAR: | |
1561 | vcpu->arch.tar_tm = set_reg_val(id, *val); | |
1562 | break; | |
1563 | #endif | |
388cc6e1 PM |
1564 | case KVM_REG_PPC_ARCH_COMPAT: |
1565 | r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val)); | |
1566 | break; | |
31f3438e | 1567 | default: |
a136a8bd | 1568 | r = -EINVAL; |
31f3438e PM |
1569 | break; |
1570 | } | |
1571 | ||
1572 | return r; | |
1573 | } | |
1574 | ||
45c940ba PM |
1575 | /* |
1576 | * On POWER9, threads are independent and can be in different partitions. | |
1577 | * Therefore we consider each thread to be a subcore. | |
1578 | * There is a restriction that all threads have to be in the same | |
1579 | * MMU mode (radix or HPT), unfortunately, but since we only support | |
1580 | * HPT guests on a HPT host so far, that isn't an impediment yet. | |
1581 | */ | |
1582 | static int threads_per_vcore(void) | |
1583 | { | |
1584 | if (cpu_has_feature(CPU_FTR_ARCH_300)) | |
1585 | return 1; | |
1586 | return threads_per_subcore; | |
1587 | } | |
1588 | ||
de9bdd1a SS |
1589 | static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core) |
1590 | { | |
1591 | struct kvmppc_vcore *vcore; | |
1592 | ||
1593 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); | |
1594 | ||
1595 | if (vcore == NULL) | |
1596 | return NULL; | |
1597 | ||
de9bdd1a | 1598 | spin_lock_init(&vcore->lock); |
2711e248 | 1599 | spin_lock_init(&vcore->stoltb_lock); |
8577370f | 1600 | init_swait_queue_head(&vcore->wq); |
de9bdd1a SS |
1601 | vcore->preempt_tb = TB_NIL; |
1602 | vcore->lpcr = kvm->arch.lpcr; | |
45c940ba | 1603 | vcore->first_vcpuid = core * threads_per_vcore(); |
de9bdd1a | 1604 | vcore->kvm = kvm; |
ec257165 | 1605 | INIT_LIST_HEAD(&vcore->preempt_list); |
de9bdd1a SS |
1606 | |
1607 | return vcore; | |
1608 | } | |
1609 | ||
b6c295df PM |
1610 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
1611 | static struct debugfs_timings_element { | |
1612 | const char *name; | |
1613 | size_t offset; | |
1614 | } timings[] = { | |
1615 | {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)}, | |
1616 | {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)}, | |
1617 | {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)}, | |
1618 | {"guest", offsetof(struct kvm_vcpu, arch.guest_time)}, | |
1619 | {"cede", offsetof(struct kvm_vcpu, arch.cede_time)}, | |
1620 | }; | |
1621 | ||
1622 | #define N_TIMINGS (sizeof(timings) / sizeof(timings[0])) | |
1623 | ||
1624 | struct debugfs_timings_state { | |
1625 | struct kvm_vcpu *vcpu; | |
1626 | unsigned int buflen; | |
1627 | char buf[N_TIMINGS * 100]; | |
1628 | }; | |
1629 | ||
1630 | static int debugfs_timings_open(struct inode *inode, struct file *file) | |
1631 | { | |
1632 | struct kvm_vcpu *vcpu = inode->i_private; | |
1633 | struct debugfs_timings_state *p; | |
1634 | ||
1635 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
1636 | if (!p) | |
1637 | return -ENOMEM; | |
1638 | ||
1639 | kvm_get_kvm(vcpu->kvm); | |
1640 | p->vcpu = vcpu; | |
1641 | file->private_data = p; | |
1642 | ||
1643 | return nonseekable_open(inode, file); | |
1644 | } | |
1645 | ||
1646 | static int debugfs_timings_release(struct inode *inode, struct file *file) | |
1647 | { | |
1648 | struct debugfs_timings_state *p = file->private_data; | |
1649 | ||
1650 | kvm_put_kvm(p->vcpu->kvm); | |
1651 | kfree(p); | |
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | static ssize_t debugfs_timings_read(struct file *file, char __user *buf, | |
1656 | size_t len, loff_t *ppos) | |
1657 | { | |
1658 | struct debugfs_timings_state *p = file->private_data; | |
1659 | struct kvm_vcpu *vcpu = p->vcpu; | |
1660 | char *s, *buf_end; | |
1661 | struct kvmhv_tb_accumulator tb; | |
1662 | u64 count; | |
1663 | loff_t pos; | |
1664 | ssize_t n; | |
1665 | int i, loops; | |
1666 | bool ok; | |
1667 | ||
1668 | if (!p->buflen) { | |
1669 | s = p->buf; | |
1670 | buf_end = s + sizeof(p->buf); | |
1671 | for (i = 0; i < N_TIMINGS; ++i) { | |
1672 | struct kvmhv_tb_accumulator *acc; | |
1673 | ||
1674 | acc = (struct kvmhv_tb_accumulator *) | |
1675 | ((unsigned long)vcpu + timings[i].offset); | |
1676 | ok = false; | |
1677 | for (loops = 0; loops < 1000; ++loops) { | |
1678 | count = acc->seqcount; | |
1679 | if (!(count & 1)) { | |
1680 | smp_rmb(); | |
1681 | tb = *acc; | |
1682 | smp_rmb(); | |
1683 | if (count == acc->seqcount) { | |
1684 | ok = true; | |
1685 | break; | |
1686 | } | |
1687 | } | |
1688 | udelay(1); | |
1689 | } | |
1690 | if (!ok) | |
1691 | snprintf(s, buf_end - s, "%s: stuck\n", | |
1692 | timings[i].name); | |
1693 | else | |
1694 | snprintf(s, buf_end - s, | |
1695 | "%s: %llu %llu %llu %llu\n", | |
1696 | timings[i].name, count / 2, | |
1697 | tb_to_ns(tb.tb_total), | |
1698 | tb_to_ns(tb.tb_min), | |
1699 | tb_to_ns(tb.tb_max)); | |
1700 | s += strlen(s); | |
1701 | } | |
1702 | p->buflen = s - p->buf; | |
1703 | } | |
1704 | ||
1705 | pos = *ppos; | |
1706 | if (pos >= p->buflen) | |
1707 | return 0; | |
1708 | if (len > p->buflen - pos) | |
1709 | len = p->buflen - pos; | |
1710 | n = copy_to_user(buf, p->buf + pos, len); | |
1711 | if (n) { | |
1712 | if (n == len) | |
1713 | return -EFAULT; | |
1714 | len -= n; | |
1715 | } | |
1716 | *ppos = pos + len; | |
1717 | return len; | |
1718 | } | |
1719 | ||
1720 | static ssize_t debugfs_timings_write(struct file *file, const char __user *buf, | |
1721 | size_t len, loff_t *ppos) | |
1722 | { | |
1723 | return -EACCES; | |
1724 | } | |
1725 | ||
1726 | static const struct file_operations debugfs_timings_ops = { | |
1727 | .owner = THIS_MODULE, | |
1728 | .open = debugfs_timings_open, | |
1729 | .release = debugfs_timings_release, | |
1730 | .read = debugfs_timings_read, | |
1731 | .write = debugfs_timings_write, | |
1732 | .llseek = generic_file_llseek, | |
1733 | }; | |
1734 | ||
1735 | /* Create a debugfs directory for the vcpu */ | |
1736 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1737 | { | |
1738 | char buf[16]; | |
1739 | struct kvm *kvm = vcpu->kvm; | |
1740 | ||
1741 | snprintf(buf, sizeof(buf), "vcpu%u", id); | |
1742 | if (IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
1743 | return; | |
1744 | vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir); | |
1745 | if (IS_ERR_OR_NULL(vcpu->arch.debugfs_dir)) | |
1746 | return; | |
1747 | vcpu->arch.debugfs_timings = | |
1748 | debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir, | |
1749 | vcpu, &debugfs_timings_ops); | |
1750 | } | |
1751 | ||
1752 | #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1753 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1754 | { | |
1755 | } | |
1756 | #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1757 | ||
3a167bea AK |
1758 | static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm, |
1759 | unsigned int id) | |
de56a948 PM |
1760 | { |
1761 | struct kvm_vcpu *vcpu; | |
371fefd6 PM |
1762 | int err = -EINVAL; |
1763 | int core; | |
1764 | struct kvmppc_vcore *vcore; | |
de56a948 | 1765 | |
45c940ba | 1766 | core = id / threads_per_vcore(); |
371fefd6 PM |
1767 | if (core >= KVM_MAX_VCORES) |
1768 | goto out; | |
1769 | ||
1770 | err = -ENOMEM; | |
6b75e6bf | 1771 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
de56a948 PM |
1772 | if (!vcpu) |
1773 | goto out; | |
1774 | ||
1775 | err = kvm_vcpu_init(vcpu, kvm, id); | |
1776 | if (err) | |
1777 | goto free_vcpu; | |
1778 | ||
1779 | vcpu->arch.shared = &vcpu->arch.shregs; | |
5deb8e7a AG |
1780 | #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE |
1781 | /* | |
1782 | * The shared struct is never shared on HV, | |
1783 | * so we can always use host endianness | |
1784 | */ | |
1785 | #ifdef __BIG_ENDIAN__ | |
1786 | vcpu->arch.shared_big_endian = true; | |
1787 | #else | |
1788 | vcpu->arch.shared_big_endian = false; | |
1789 | #endif | |
1790 | #endif | |
de56a948 PM |
1791 | vcpu->arch.mmcr[0] = MMCR0_FC; |
1792 | vcpu->arch.ctrl = CTRL_RUNLATCH; | |
1793 | /* default to host PVR, since we can't spoof it */ | |
3a167bea | 1794 | kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR)); |
2e25aa5f | 1795 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
c7b67670 PM |
1796 | spin_lock_init(&vcpu->arch.tbacct_lock); |
1797 | vcpu->arch.busy_preempt = TB_NIL; | |
d682916a | 1798 | vcpu->arch.intr_msr = MSR_SF | MSR_ME; |
de56a948 | 1799 | |
de56a948 PM |
1800 | kvmppc_mmu_book3s_hv_init(vcpu); |
1801 | ||
8455d79e | 1802 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
371fefd6 PM |
1803 | |
1804 | init_waitqueue_head(&vcpu->arch.cpu_run); | |
1805 | ||
1806 | mutex_lock(&kvm->lock); | |
1807 | vcore = kvm->arch.vcores[core]; | |
1808 | if (!vcore) { | |
de9bdd1a | 1809 | vcore = kvmppc_vcore_create(kvm, core); |
371fefd6 | 1810 | kvm->arch.vcores[core] = vcore; |
1b400ba0 | 1811 | kvm->arch.online_vcores++; |
371fefd6 PM |
1812 | } |
1813 | mutex_unlock(&kvm->lock); | |
1814 | ||
1815 | if (!vcore) | |
1816 | goto free_vcpu; | |
1817 | ||
1818 | spin_lock(&vcore->lock); | |
1819 | ++vcore->num_threads; | |
371fefd6 PM |
1820 | spin_unlock(&vcore->lock); |
1821 | vcpu->arch.vcore = vcore; | |
e0b7ec05 | 1822 | vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid; |
ec257165 | 1823 | vcpu->arch.thread_cpu = -1; |
371fefd6 | 1824 | |
af8f38b3 AG |
1825 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
1826 | kvmppc_sanity_check(vcpu); | |
1827 | ||
b6c295df PM |
1828 | debugfs_vcpu_init(vcpu, id); |
1829 | ||
de56a948 PM |
1830 | return vcpu; |
1831 | ||
1832 | free_vcpu: | |
6b75e6bf | 1833 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1834 | out: |
1835 | return ERR_PTR(err); | |
1836 | } | |
1837 | ||
c35635ef PM |
1838 | static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) |
1839 | { | |
1840 | if (vpa->pinned_addr) | |
1841 | kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa, | |
1842 | vpa->dirty); | |
1843 | } | |
1844 | ||
3a167bea | 1845 | static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) |
de56a948 | 1846 | { |
2e25aa5f | 1847 | spin_lock(&vcpu->arch.vpa_update_lock); |
c35635ef PM |
1848 | unpin_vpa(vcpu->kvm, &vcpu->arch.dtl); |
1849 | unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow); | |
1850 | unpin_vpa(vcpu->kvm, &vcpu->arch.vpa); | |
2e25aa5f | 1851 | spin_unlock(&vcpu->arch.vpa_update_lock); |
de56a948 | 1852 | kvm_vcpu_uninit(vcpu); |
6b75e6bf | 1853 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1854 | } |
1855 | ||
3a167bea AK |
1856 | static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu) |
1857 | { | |
1858 | /* Indicate we want to get back into the guest */ | |
1859 | return 1; | |
1860 | } | |
1861 | ||
19ccb76a | 1862 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
371fefd6 | 1863 | { |
19ccb76a | 1864 | unsigned long dec_nsec, now; |
371fefd6 | 1865 | |
19ccb76a PM |
1866 | now = get_tb(); |
1867 | if (now > vcpu->arch.dec_expires) { | |
1868 | /* decrementer has already gone negative */ | |
1869 | kvmppc_core_queue_dec(vcpu); | |
7e28e60e | 1870 | kvmppc_core_prepare_to_enter(vcpu); |
19ccb76a | 1871 | return; |
371fefd6 | 1872 | } |
19ccb76a PM |
1873 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
1874 | / tb_ticks_per_sec; | |
8b0e1953 | 1875 | hrtimer_start(&vcpu->arch.dec_timer, dec_nsec, HRTIMER_MODE_REL); |
19ccb76a | 1876 | vcpu->arch.timer_running = 1; |
371fefd6 PM |
1877 | } |
1878 | ||
19ccb76a | 1879 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
371fefd6 | 1880 | { |
19ccb76a PM |
1881 | vcpu->arch.ceded = 0; |
1882 | if (vcpu->arch.timer_running) { | |
1883 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1884 | vcpu->arch.timer_running = 0; | |
1885 | } | |
371fefd6 PM |
1886 | } |
1887 | ||
e0b7ec05 | 1888 | extern void __kvmppc_vcore_entry(void); |
de56a948 | 1889 | |
371fefd6 PM |
1890 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
1891 | struct kvm_vcpu *vcpu) | |
de56a948 | 1892 | { |
c7b67670 PM |
1893 | u64 now; |
1894 | ||
371fefd6 PM |
1895 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
1896 | return; | |
bf3d32e1 | 1897 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
1898 | now = mftb(); |
1899 | vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - | |
1900 | vcpu->arch.stolen_logged; | |
1901 | vcpu->arch.busy_preempt = now; | |
1902 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; | |
bf3d32e1 | 1903 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
371fefd6 | 1904 | --vc->n_runnable; |
7b5f8272 | 1905 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], NULL); |
371fefd6 PM |
1906 | } |
1907 | ||
f0888f70 PM |
1908 | static int kvmppc_grab_hwthread(int cpu) |
1909 | { | |
1910 | struct paca_struct *tpaca; | |
b754c739 | 1911 | long timeout = 10000; |
f0888f70 PM |
1912 | |
1913 | tpaca = &paca[cpu]; | |
1914 | ||
1915 | /* Ensure the thread won't go into the kernel if it wakes */ | |
7b444c67 | 1916 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
b4deba5c | 1917 | tpaca->kvm_hstate.kvm_vcore = NULL; |
5d5b99cd PM |
1918 | tpaca->kvm_hstate.napping = 0; |
1919 | smp_wmb(); | |
1920 | tpaca->kvm_hstate.hwthread_req = 1; | |
f0888f70 PM |
1921 | |
1922 | /* | |
1923 | * If the thread is already executing in the kernel (e.g. handling | |
1924 | * a stray interrupt), wait for it to get back to nap mode. | |
1925 | * The smp_mb() is to ensure that our setting of hwthread_req | |
1926 | * is visible before we look at hwthread_state, so if this | |
1927 | * races with the code at system_reset_pSeries and the thread | |
1928 | * misses our setting of hwthread_req, we are sure to see its | |
1929 | * setting of hwthread_state, and vice versa. | |
1930 | */ | |
1931 | smp_mb(); | |
1932 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { | |
1933 | if (--timeout <= 0) { | |
1934 | pr_err("KVM: couldn't grab cpu %d\n", cpu); | |
1935 | return -EBUSY; | |
1936 | } | |
1937 | udelay(1); | |
1938 | } | |
1939 | return 0; | |
1940 | } | |
1941 | ||
1942 | static void kvmppc_release_hwthread(int cpu) | |
1943 | { | |
1944 | struct paca_struct *tpaca; | |
1945 | ||
1946 | tpaca = &paca[cpu]; | |
1947 | tpaca->kvm_hstate.hwthread_req = 0; | |
1948 | tpaca->kvm_hstate.kvm_vcpu = NULL; | |
b4deba5c PM |
1949 | tpaca->kvm_hstate.kvm_vcore = NULL; |
1950 | tpaca->kvm_hstate.kvm_split_mode = NULL; | |
f0888f70 PM |
1951 | } |
1952 | ||
b4deba5c | 1953 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc) |
371fefd6 PM |
1954 | { |
1955 | int cpu; | |
1956 | struct paca_struct *tpaca; | |
ec257165 | 1957 | struct kvmppc_vcore *mvc = vc->master_vcore; |
371fefd6 | 1958 | |
b4deba5c PM |
1959 | cpu = vc->pcpu; |
1960 | if (vcpu) { | |
1961 | if (vcpu->arch.timer_running) { | |
1962 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1963 | vcpu->arch.timer_running = 0; | |
1964 | } | |
1965 | cpu += vcpu->arch.ptid; | |
1966 | vcpu->cpu = mvc->pcpu; | |
1967 | vcpu->arch.thread_cpu = cpu; | |
19ccb76a | 1968 | } |
371fefd6 | 1969 | tpaca = &paca[cpu]; |
5d5b99cd | 1970 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
ec257165 | 1971 | tpaca->kvm_hstate.ptid = cpu - mvc->pcpu; |
ec257165 | 1972 | /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */ |
371fefd6 | 1973 | smp_wmb(); |
b4deba5c | 1974 | tpaca->kvm_hstate.kvm_vcore = mvc; |
5d5b99cd | 1975 | if (cpu != smp_processor_id()) |
66feed61 | 1976 | kvmppc_ipi_thread(cpu); |
371fefd6 | 1977 | } |
de56a948 | 1978 | |
5d5b99cd | 1979 | static void kvmppc_wait_for_nap(void) |
371fefd6 | 1980 | { |
5d5b99cd PM |
1981 | int cpu = smp_processor_id(); |
1982 | int i, loops; | |
45c940ba | 1983 | int n_threads = threads_per_vcore(); |
371fefd6 | 1984 | |
45c940ba PM |
1985 | if (n_threads <= 1) |
1986 | return; | |
5d5b99cd PM |
1987 | for (loops = 0; loops < 1000000; ++loops) { |
1988 | /* | |
1989 | * Check if all threads are finished. | |
b4deba5c | 1990 | * We set the vcore pointer when starting a thread |
5d5b99cd | 1991 | * and the thread clears it when finished, so we look |
b4deba5c | 1992 | * for any threads that still have a non-NULL vcore ptr. |
5d5b99cd | 1993 | */ |
45c940ba | 1994 | for (i = 1; i < n_threads; ++i) |
b4deba5c | 1995 | if (paca[cpu + i].kvm_hstate.kvm_vcore) |
5d5b99cd | 1996 | break; |
45c940ba | 1997 | if (i == n_threads) { |
5d5b99cd PM |
1998 | HMT_medium(); |
1999 | return; | |
371fefd6 | 2000 | } |
5d5b99cd | 2001 | HMT_low(); |
371fefd6 PM |
2002 | } |
2003 | HMT_medium(); | |
45c940ba | 2004 | for (i = 1; i < n_threads; ++i) |
b4deba5c | 2005 | if (paca[cpu + i].kvm_hstate.kvm_vcore) |
5d5b99cd | 2006 | pr_err("KVM: CPU %d seems to be stuck\n", cpu + i); |
371fefd6 PM |
2007 | } |
2008 | ||
2009 | /* | |
2010 | * Check that we are on thread 0 and that any other threads in | |
7b444c67 PM |
2011 | * this core are off-line. Then grab the threads so they can't |
2012 | * enter the kernel. | |
371fefd6 PM |
2013 | */ |
2014 | static int on_primary_thread(void) | |
2015 | { | |
2016 | int cpu = smp_processor_id(); | |
3102f784 | 2017 | int thr; |
371fefd6 | 2018 | |
3102f784 ME |
2019 | /* Are we on a primary subcore? */ |
2020 | if (cpu_thread_in_subcore(cpu)) | |
371fefd6 | 2021 | return 0; |
3102f784 ME |
2022 | |
2023 | thr = 0; | |
2024 | while (++thr < threads_per_subcore) | |
371fefd6 PM |
2025 | if (cpu_online(cpu + thr)) |
2026 | return 0; | |
7b444c67 PM |
2027 | |
2028 | /* Grab all hw threads so they can't go into the kernel */ | |
3102f784 | 2029 | for (thr = 1; thr < threads_per_subcore; ++thr) { |
7b444c67 PM |
2030 | if (kvmppc_grab_hwthread(cpu + thr)) { |
2031 | /* Couldn't grab one; let the others go */ | |
2032 | do { | |
2033 | kvmppc_release_hwthread(cpu + thr); | |
2034 | } while (--thr > 0); | |
2035 | return 0; | |
2036 | } | |
2037 | } | |
371fefd6 PM |
2038 | return 1; |
2039 | } | |
2040 | ||
ec257165 PM |
2041 | /* |
2042 | * A list of virtual cores for each physical CPU. | |
2043 | * These are vcores that could run but their runner VCPU tasks are | |
2044 | * (or may be) preempted. | |
2045 | */ | |
2046 | struct preempted_vcore_list { | |
2047 | struct list_head list; | |
2048 | spinlock_t lock; | |
2049 | }; | |
2050 | ||
2051 | static DEFINE_PER_CPU(struct preempted_vcore_list, preempted_vcores); | |
2052 | ||
2053 | static void init_vcore_lists(void) | |
2054 | { | |
2055 | int cpu; | |
2056 | ||
2057 | for_each_possible_cpu(cpu) { | |
2058 | struct preempted_vcore_list *lp = &per_cpu(preempted_vcores, cpu); | |
2059 | spin_lock_init(&lp->lock); | |
2060 | INIT_LIST_HEAD(&lp->list); | |
2061 | } | |
2062 | } | |
2063 | ||
2064 | static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc) | |
2065 | { | |
2066 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); | |
2067 | ||
2068 | vc->vcore_state = VCORE_PREEMPT; | |
2069 | vc->pcpu = smp_processor_id(); | |
45c940ba | 2070 | if (vc->num_threads < threads_per_vcore()) { |
ec257165 PM |
2071 | spin_lock(&lp->lock); |
2072 | list_add_tail(&vc->preempt_list, &lp->list); | |
2073 | spin_unlock(&lp->lock); | |
2074 | } | |
2075 | ||
2076 | /* Start accumulating stolen time */ | |
2077 | kvmppc_core_start_stolen(vc); | |
2078 | } | |
2079 | ||
2080 | static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc) | |
2081 | { | |
402813fe | 2082 | struct preempted_vcore_list *lp; |
ec257165 PM |
2083 | |
2084 | kvmppc_core_end_stolen(vc); | |
2085 | if (!list_empty(&vc->preempt_list)) { | |
402813fe | 2086 | lp = &per_cpu(preempted_vcores, vc->pcpu); |
ec257165 PM |
2087 | spin_lock(&lp->lock); |
2088 | list_del_init(&vc->preempt_list); | |
2089 | spin_unlock(&lp->lock); | |
2090 | } | |
2091 | vc->vcore_state = VCORE_INACTIVE; | |
2092 | } | |
2093 | ||
b4deba5c PM |
2094 | /* |
2095 | * This stores information about the virtual cores currently | |
2096 | * assigned to a physical core. | |
2097 | */ | |
ec257165 | 2098 | struct core_info { |
b4deba5c PM |
2099 | int n_subcores; |
2100 | int max_subcore_threads; | |
ec257165 | 2101 | int total_threads; |
b4deba5c PM |
2102 | int subcore_threads[MAX_SUBCORES]; |
2103 | struct kvm *subcore_vm[MAX_SUBCORES]; | |
2104 | struct list_head vcs[MAX_SUBCORES]; | |
ec257165 PM |
2105 | }; |
2106 | ||
b4deba5c PM |
2107 | /* |
2108 | * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7 | |
2109 | * respectively in 2-way micro-threading (split-core) mode. | |
2110 | */ | |
2111 | static int subcore_thread_map[MAX_SUBCORES] = { 0, 4, 2, 6 }; | |
2112 | ||
ec257165 PM |
2113 | static void init_core_info(struct core_info *cip, struct kvmppc_vcore *vc) |
2114 | { | |
b4deba5c PM |
2115 | int sub; |
2116 | ||
ec257165 | 2117 | memset(cip, 0, sizeof(*cip)); |
b4deba5c PM |
2118 | cip->n_subcores = 1; |
2119 | cip->max_subcore_threads = vc->num_threads; | |
ec257165 | 2120 | cip->total_threads = vc->num_threads; |
b4deba5c PM |
2121 | cip->subcore_threads[0] = vc->num_threads; |
2122 | cip->subcore_vm[0] = vc->kvm; | |
2123 | for (sub = 0; sub < MAX_SUBCORES; ++sub) | |
2124 | INIT_LIST_HEAD(&cip->vcs[sub]); | |
2125 | list_add_tail(&vc->preempt_list, &cip->vcs[0]); | |
2126 | } | |
2127 | ||
2128 | static bool subcore_config_ok(int n_subcores, int n_threads) | |
2129 | { | |
2130 | /* Can only dynamically split if unsplit to begin with */ | |
2131 | if (n_subcores > 1 && threads_per_subcore < MAX_SMT_THREADS) | |
2132 | return false; | |
2133 | if (n_subcores > MAX_SUBCORES) | |
2134 | return false; | |
2135 | if (n_subcores > 1) { | |
2136 | if (!(dynamic_mt_modes & 2)) | |
2137 | n_subcores = 4; | |
2138 | if (n_subcores > 2 && !(dynamic_mt_modes & 4)) | |
2139 | return false; | |
2140 | } | |
2141 | ||
2142 | return n_subcores * roundup_pow_of_two(n_threads) <= MAX_SMT_THREADS; | |
ec257165 PM |
2143 | } |
2144 | ||
2145 | static void init_master_vcore(struct kvmppc_vcore *vc) | |
2146 | { | |
2147 | vc->master_vcore = vc; | |
2148 | vc->entry_exit_map = 0; | |
2149 | vc->in_guest = 0; | |
2150 | vc->napping_threads = 0; | |
2151 | vc->conferring_threads = 0; | |
2152 | } | |
2153 | ||
b4deba5c PM |
2154 | static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip) |
2155 | { | |
2156 | int n_threads = vc->num_threads; | |
2157 | int sub; | |
2158 | ||
2159 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
2160 | return false; | |
2161 | ||
2162 | if (n_threads < cip->max_subcore_threads) | |
2163 | n_threads = cip->max_subcore_threads; | |
b009031f | 2164 | if (!subcore_config_ok(cip->n_subcores + 1, n_threads)) |
b4deba5c | 2165 | return false; |
b009031f | 2166 | cip->max_subcore_threads = n_threads; |
b4deba5c PM |
2167 | |
2168 | sub = cip->n_subcores; | |
2169 | ++cip->n_subcores; | |
2170 | cip->total_threads += vc->num_threads; | |
2171 | cip->subcore_threads[sub] = vc->num_threads; | |
2172 | cip->subcore_vm[sub] = vc->kvm; | |
2173 | init_master_vcore(vc); | |
28d057c8 | 2174 | list_move_tail(&vc->preempt_list, &cip->vcs[sub]); |
b4deba5c PM |
2175 | |
2176 | return true; | |
2177 | } | |
2178 | ||
b4deba5c PM |
2179 | /* |
2180 | * Work out whether it is possible to piggyback the execution of | |
2181 | * vcore *pvc onto the execution of the other vcores described in *cip. | |
2182 | */ | |
2183 | static bool can_piggyback(struct kvmppc_vcore *pvc, struct core_info *cip, | |
2184 | int target_threads) | |
2185 | { | |
b4deba5c PM |
2186 | if (cip->total_threads + pvc->num_threads > target_threads) |
2187 | return false; | |
b4deba5c | 2188 | |
b009031f | 2189 | return can_dynamic_split(pvc, cip); |
b4deba5c PM |
2190 | } |
2191 | ||
d911f0be PM |
2192 | static void prepare_threads(struct kvmppc_vcore *vc) |
2193 | { | |
7b5f8272 SJS |
2194 | int i; |
2195 | struct kvm_vcpu *vcpu; | |
d911f0be | 2196 | |
7b5f8272 | 2197 | for_each_runnable_thread(i, vcpu, vc) { |
d911f0be PM |
2198 | if (signal_pending(vcpu->arch.run_task)) |
2199 | vcpu->arch.ret = -EINTR; | |
2200 | else if (vcpu->arch.vpa.update_pending || | |
2201 | vcpu->arch.slb_shadow.update_pending || | |
2202 | vcpu->arch.dtl.update_pending) | |
2203 | vcpu->arch.ret = RESUME_GUEST; | |
2204 | else | |
2205 | continue; | |
2206 | kvmppc_remove_runnable(vc, vcpu); | |
2207 | wake_up(&vcpu->arch.cpu_run); | |
2208 | } | |
2209 | } | |
2210 | ||
ec257165 PM |
2211 | static void collect_piggybacks(struct core_info *cip, int target_threads) |
2212 | { | |
2213 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); | |
2214 | struct kvmppc_vcore *pvc, *vcnext; | |
2215 | ||
2216 | spin_lock(&lp->lock); | |
2217 | list_for_each_entry_safe(pvc, vcnext, &lp->list, preempt_list) { | |
2218 | if (!spin_trylock(&pvc->lock)) | |
2219 | continue; | |
2220 | prepare_threads(pvc); | |
2221 | if (!pvc->n_runnable) { | |
2222 | list_del_init(&pvc->preempt_list); | |
2223 | if (pvc->runner == NULL) { | |
2224 | pvc->vcore_state = VCORE_INACTIVE; | |
2225 | kvmppc_core_end_stolen(pvc); | |
2226 | } | |
2227 | spin_unlock(&pvc->lock); | |
2228 | continue; | |
2229 | } | |
2230 | if (!can_piggyback(pvc, cip, target_threads)) { | |
2231 | spin_unlock(&pvc->lock); | |
2232 | continue; | |
2233 | } | |
2234 | kvmppc_core_end_stolen(pvc); | |
2235 | pvc->vcore_state = VCORE_PIGGYBACK; | |
2236 | if (cip->total_threads >= target_threads) | |
2237 | break; | |
2238 | } | |
2239 | spin_unlock(&lp->lock); | |
2240 | } | |
2241 | ||
2242 | static void post_guest_process(struct kvmppc_vcore *vc, bool is_master) | |
25fedfca | 2243 | { |
7b5f8272 | 2244 | int still_running = 0, i; |
25fedfca PM |
2245 | u64 now; |
2246 | long ret; | |
7b5f8272 | 2247 | struct kvm_vcpu *vcpu; |
25fedfca | 2248 | |
ec257165 | 2249 | spin_lock(&vc->lock); |
25fedfca | 2250 | now = get_tb(); |
7b5f8272 | 2251 | for_each_runnable_thread(i, vcpu, vc) { |
25fedfca PM |
2252 | /* cancel pending dec exception if dec is positive */ |
2253 | if (now < vcpu->arch.dec_expires && | |
2254 | kvmppc_core_pending_dec(vcpu)) | |
2255 | kvmppc_core_dequeue_dec(vcpu); | |
2256 | ||
2257 | trace_kvm_guest_exit(vcpu); | |
2258 | ||
2259 | ret = RESUME_GUEST; | |
2260 | if (vcpu->arch.trap) | |
2261 | ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu, | |
2262 | vcpu->arch.run_task); | |
2263 | ||
2264 | vcpu->arch.ret = ret; | |
2265 | vcpu->arch.trap = 0; | |
2266 | ||
ec257165 PM |
2267 | if (is_kvmppc_resume_guest(vcpu->arch.ret)) { |
2268 | if (vcpu->arch.pending_exceptions) | |
2269 | kvmppc_core_prepare_to_enter(vcpu); | |
2270 | if (vcpu->arch.ceded) | |
25fedfca | 2271 | kvmppc_set_timer(vcpu); |
ec257165 PM |
2272 | else |
2273 | ++still_running; | |
2274 | } else { | |
25fedfca PM |
2275 | kvmppc_remove_runnable(vc, vcpu); |
2276 | wake_up(&vcpu->arch.cpu_run); | |
2277 | } | |
2278 | } | |
ec257165 PM |
2279 | list_del_init(&vc->preempt_list); |
2280 | if (!is_master) { | |
563a1e93 | 2281 | if (still_running > 0) { |
ec257165 | 2282 | kvmppc_vcore_preempt(vc); |
563a1e93 PM |
2283 | } else if (vc->runner) { |
2284 | vc->vcore_state = VCORE_PREEMPT; | |
2285 | kvmppc_core_start_stolen(vc); | |
2286 | } else { | |
2287 | vc->vcore_state = VCORE_INACTIVE; | |
2288 | } | |
ec257165 PM |
2289 | if (vc->n_runnable > 0 && vc->runner == NULL) { |
2290 | /* make sure there's a candidate runner awake */ | |
7b5f8272 SJS |
2291 | i = -1; |
2292 | vcpu = next_runnable_thread(vc, &i); | |
ec257165 PM |
2293 | wake_up(&vcpu->arch.cpu_run); |
2294 | } | |
2295 | } | |
2296 | spin_unlock(&vc->lock); | |
25fedfca PM |
2297 | } |
2298 | ||
b8e6a87c SW |
2299 | /* |
2300 | * Clear core from the list of active host cores as we are about to | |
2301 | * enter the guest. Only do this if it is the primary thread of the | |
2302 | * core (not if a subcore) that is entering the guest. | |
2303 | */ | |
3f7cd919 | 2304 | static inline int kvmppc_clear_host_core(unsigned int cpu) |
b8e6a87c SW |
2305 | { |
2306 | int core; | |
2307 | ||
2308 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) | |
3f7cd919 | 2309 | return 0; |
b8e6a87c SW |
2310 | /* |
2311 | * Memory barrier can be omitted here as we will do a smp_wmb() | |
2312 | * later in kvmppc_start_thread and we need ensure that state is | |
2313 | * visible to other CPUs only after we enter guest. | |
2314 | */ | |
2315 | core = cpu >> threads_shift; | |
2316 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 0; | |
3f7cd919 | 2317 | return 0; |
b8e6a87c SW |
2318 | } |
2319 | ||
2320 | /* | |
2321 | * Advertise this core as an active host core since we exited the guest | |
2322 | * Only need to do this if it is the primary thread of the core that is | |
2323 | * exiting. | |
2324 | */ | |
3f7cd919 | 2325 | static inline int kvmppc_set_host_core(unsigned int cpu) |
b8e6a87c SW |
2326 | { |
2327 | int core; | |
2328 | ||
2329 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) | |
3f7cd919 | 2330 | return 0; |
b8e6a87c SW |
2331 | |
2332 | /* | |
2333 | * Memory barrier can be omitted here because we do a spin_unlock | |
2334 | * immediately after this which provides the memory barrier. | |
2335 | */ | |
2336 | core = cpu >> threads_shift; | |
2337 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 1; | |
3f7cd919 | 2338 | return 0; |
b8e6a87c SW |
2339 | } |
2340 | ||
371fefd6 PM |
2341 | /* |
2342 | * Run a set of guest threads on a physical core. | |
2343 | * Called with vc->lock held. | |
2344 | */ | |
66feed61 | 2345 | static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) |
371fefd6 | 2346 | { |
7b5f8272 | 2347 | struct kvm_vcpu *vcpu; |
d911f0be | 2348 | int i; |
2c9097e4 | 2349 | int srcu_idx; |
ec257165 PM |
2350 | struct core_info core_info; |
2351 | struct kvmppc_vcore *pvc, *vcnext; | |
b4deba5c PM |
2352 | struct kvm_split_mode split_info, *sip; |
2353 | int split, subcore_size, active; | |
2354 | int sub; | |
2355 | bool thr0_done; | |
2356 | unsigned long cmd_bit, stat_bit; | |
ec257165 PM |
2357 | int pcpu, thr; |
2358 | int target_threads; | |
45c940ba | 2359 | int controlled_threads; |
371fefd6 | 2360 | |
d911f0be PM |
2361 | /* |
2362 | * Remove from the list any threads that have a signal pending | |
2363 | * or need a VPA update done | |
2364 | */ | |
2365 | prepare_threads(vc); | |
2366 | ||
2367 | /* if the runner is no longer runnable, let the caller pick a new one */ | |
2368 | if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE) | |
2369 | return; | |
081f323b PM |
2370 | |
2371 | /* | |
d911f0be | 2372 | * Initialize *vc. |
081f323b | 2373 | */ |
ec257165 | 2374 | init_master_vcore(vc); |
2711e248 | 2375 | vc->preempt_tb = TB_NIL; |
081f323b | 2376 | |
45c940ba PM |
2377 | /* |
2378 | * Number of threads that we will be controlling: the same as | |
2379 | * the number of threads per subcore, except on POWER9, | |
2380 | * where it's 1 because the threads are (mostly) independent. | |
2381 | */ | |
2382 | controlled_threads = threads_per_vcore(); | |
2383 | ||
7b444c67 | 2384 | /* |
3102f784 ME |
2385 | * Make sure we are running on primary threads, and that secondary |
2386 | * threads are offline. Also check if the number of threads in this | |
2387 | * guest are greater than the current system threads per guest. | |
7b444c67 | 2388 | */ |
45c940ba | 2389 | if ((controlled_threads > 1) && |
3102f784 | 2390 | ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) { |
7b5f8272 | 2391 | for_each_runnable_thread(i, vcpu, vc) { |
7b444c67 | 2392 | vcpu->arch.ret = -EBUSY; |
25fedfca PM |
2393 | kvmppc_remove_runnable(vc, vcpu); |
2394 | wake_up(&vcpu->arch.cpu_run); | |
2395 | } | |
7b444c67 PM |
2396 | goto out; |
2397 | } | |
2398 | ||
ec257165 PM |
2399 | /* |
2400 | * See if we could run any other vcores on the physical core | |
2401 | * along with this one. | |
2402 | */ | |
2403 | init_core_info(&core_info, vc); | |
2404 | pcpu = smp_processor_id(); | |
45c940ba | 2405 | target_threads = controlled_threads; |
ec257165 PM |
2406 | if (target_smt_mode && target_smt_mode < target_threads) |
2407 | target_threads = target_smt_mode; | |
2408 | if (vc->num_threads < target_threads) | |
2409 | collect_piggybacks(&core_info, target_threads); | |
3102f784 | 2410 | |
b4deba5c PM |
2411 | /* Decide on micro-threading (split-core) mode */ |
2412 | subcore_size = threads_per_subcore; | |
2413 | cmd_bit = stat_bit = 0; | |
2414 | split = core_info.n_subcores; | |
2415 | sip = NULL; | |
2416 | if (split > 1) { | |
2417 | /* threads_per_subcore must be MAX_SMT_THREADS (8) here */ | |
2418 | if (split == 2 && (dynamic_mt_modes & 2)) { | |
2419 | cmd_bit = HID0_POWER8_1TO2LPAR; | |
2420 | stat_bit = HID0_POWER8_2LPARMODE; | |
2421 | } else { | |
2422 | split = 4; | |
2423 | cmd_bit = HID0_POWER8_1TO4LPAR; | |
2424 | stat_bit = HID0_POWER8_4LPARMODE; | |
2425 | } | |
2426 | subcore_size = MAX_SMT_THREADS / split; | |
2427 | sip = &split_info; | |
2428 | memset(&split_info, 0, sizeof(split_info)); | |
2429 | split_info.rpr = mfspr(SPRN_RPR); | |
2430 | split_info.pmmar = mfspr(SPRN_PMMAR); | |
2431 | split_info.ldbar = mfspr(SPRN_LDBAR); | |
2432 | split_info.subcore_size = subcore_size; | |
2433 | for (sub = 0; sub < core_info.n_subcores; ++sub) | |
2434 | split_info.master_vcs[sub] = | |
2435 | list_first_entry(&core_info.vcs[sub], | |
2436 | struct kvmppc_vcore, preempt_list); | |
2437 | /* order writes to split_info before kvm_split_mode pointer */ | |
2438 | smp_wmb(); | |
2439 | } | |
2440 | pcpu = smp_processor_id(); | |
45c940ba | 2441 | for (thr = 0; thr < controlled_threads; ++thr) |
b4deba5c PM |
2442 | paca[pcpu + thr].kvm_hstate.kvm_split_mode = sip; |
2443 | ||
2444 | /* Initiate micro-threading (split-core) if required */ | |
2445 | if (cmd_bit) { | |
2446 | unsigned long hid0 = mfspr(SPRN_HID0); | |
2447 | ||
2448 | hid0 |= cmd_bit | HID0_POWER8_DYNLPARDIS; | |
2449 | mb(); | |
2450 | mtspr(SPRN_HID0, hid0); | |
2451 | isync(); | |
2452 | for (;;) { | |
2453 | hid0 = mfspr(SPRN_HID0); | |
2454 | if (hid0 & stat_bit) | |
2455 | break; | |
2456 | cpu_relax(); | |
ec257165 | 2457 | } |
2e25aa5f | 2458 | } |
3102f784 | 2459 | |
b8e6a87c SW |
2460 | kvmppc_clear_host_core(pcpu); |
2461 | ||
b4deba5c PM |
2462 | /* Start all the threads */ |
2463 | active = 0; | |
2464 | for (sub = 0; sub < core_info.n_subcores; ++sub) { | |
2465 | thr = subcore_thread_map[sub]; | |
2466 | thr0_done = false; | |
2467 | active |= 1 << thr; | |
2468 | list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) { | |
2469 | pvc->pcpu = pcpu + thr; | |
7b5f8272 | 2470 | for_each_runnable_thread(i, vcpu, pvc) { |
b4deba5c PM |
2471 | kvmppc_start_thread(vcpu, pvc); |
2472 | kvmppc_create_dtl_entry(vcpu, pvc); | |
2473 | trace_kvm_guest_enter(vcpu); | |
2474 | if (!vcpu->arch.ptid) | |
2475 | thr0_done = true; | |
2476 | active |= 1 << (thr + vcpu->arch.ptid); | |
2477 | } | |
2478 | /* | |
2479 | * We need to start the first thread of each subcore | |
2480 | * even if it doesn't have a vcpu. | |
2481 | */ | |
2482 | if (pvc->master_vcore == pvc && !thr0_done) | |
2483 | kvmppc_start_thread(NULL, pvc); | |
2484 | thr += pvc->num_threads; | |
2485 | } | |
2e25aa5f | 2486 | } |
371fefd6 | 2487 | |
7f235328 GS |
2488 | /* |
2489 | * Ensure that split_info.do_nap is set after setting | |
2490 | * the vcore pointer in the PACA of the secondaries. | |
2491 | */ | |
2492 | smp_mb(); | |
2493 | if (cmd_bit) | |
2494 | split_info.do_nap = 1; /* ask secondaries to nap when done */ | |
2495 | ||
b4deba5c PM |
2496 | /* |
2497 | * When doing micro-threading, poke the inactive threads as well. | |
2498 | * This gets them to the nap instruction after kvm_do_nap, | |
2499 | * which reduces the time taken to unsplit later. | |
2500 | */ | |
2501 | if (split > 1) | |
2502 | for (thr = 1; thr < threads_per_subcore; ++thr) | |
2503 | if (!(active & (1 << thr))) | |
2504 | kvmppc_ipi_thread(pcpu + thr); | |
e0b7ec05 | 2505 | |
2f12f034 | 2506 | vc->vcore_state = VCORE_RUNNING; |
19ccb76a | 2507 | preempt_disable(); |
3c78f78a SW |
2508 | |
2509 | trace_kvmppc_run_core(vc, 0); | |
2510 | ||
b4deba5c PM |
2511 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
2512 | list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) | |
2513 | spin_unlock(&pvc->lock); | |
de56a948 | 2514 | |
6edaa530 | 2515 | guest_enter(); |
2c9097e4 | 2516 | |
e0b7ec05 | 2517 | srcu_idx = srcu_read_lock(&vc->kvm->srcu); |
2c9097e4 | 2518 | |
e0b7ec05 | 2519 | __kvmppc_vcore_entry(); |
de56a948 | 2520 | |
ec257165 PM |
2521 | srcu_read_unlock(&vc->kvm->srcu, srcu_idx); |
2522 | ||
2523 | spin_lock(&vc->lock); | |
371fefd6 | 2524 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
19ccb76a | 2525 | vc->vcore_state = VCORE_EXITING; |
371fefd6 | 2526 | |
19ccb76a | 2527 | /* wait for secondary threads to finish writing their state to memory */ |
5d5b99cd | 2528 | kvmppc_wait_for_nap(); |
b4deba5c PM |
2529 | |
2530 | /* Return to whole-core mode if we split the core earlier */ | |
2531 | if (split > 1) { | |
2532 | unsigned long hid0 = mfspr(SPRN_HID0); | |
2533 | unsigned long loops = 0; | |
2534 | ||
2535 | hid0 &= ~HID0_POWER8_DYNLPARDIS; | |
2536 | stat_bit = HID0_POWER8_2LPARMODE | HID0_POWER8_4LPARMODE; | |
2537 | mb(); | |
2538 | mtspr(SPRN_HID0, hid0); | |
2539 | isync(); | |
2540 | for (;;) { | |
2541 | hid0 = mfspr(SPRN_HID0); | |
2542 | if (!(hid0 & stat_bit)) | |
2543 | break; | |
2544 | cpu_relax(); | |
2545 | ++loops; | |
2546 | } | |
2547 | split_info.do_nap = 0; | |
2548 | } | |
2549 | ||
2550 | /* Let secondaries go back to the offline loop */ | |
45c940ba | 2551 | for (i = 0; i < controlled_threads; ++i) { |
b4deba5c PM |
2552 | kvmppc_release_hwthread(pcpu + i); |
2553 | if (sip && sip->napped[i]) | |
2554 | kvmppc_ipi_thread(pcpu + i); | |
2555 | } | |
2556 | ||
b8e6a87c SW |
2557 | kvmppc_set_host_core(pcpu); |
2558 | ||
371fefd6 | 2559 | spin_unlock(&vc->lock); |
2c9097e4 | 2560 | |
371fefd6 PM |
2561 | /* make sure updates to secondary vcpu structs are visible now */ |
2562 | smp_mb(); | |
6edaa530 | 2563 | guest_exit(); |
de56a948 | 2564 | |
b4deba5c PM |
2565 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
2566 | list_for_each_entry_safe(pvc, vcnext, &core_info.vcs[sub], | |
2567 | preempt_list) | |
2568 | post_guest_process(pvc, pvc == vc); | |
de56a948 | 2569 | |
913d3ff9 | 2570 | spin_lock(&vc->lock); |
ec257165 | 2571 | preempt_enable(); |
de56a948 PM |
2572 | |
2573 | out: | |
19ccb76a | 2574 | vc->vcore_state = VCORE_INACTIVE; |
3c78f78a | 2575 | trace_kvmppc_run_core(vc, 1); |
371fefd6 PM |
2576 | } |
2577 | ||
19ccb76a PM |
2578 | /* |
2579 | * Wait for some other vcpu thread to execute us, and | |
2580 | * wake us up when we need to handle something in the host. | |
2581 | */ | |
ec257165 PM |
2582 | static void kvmppc_wait_for_exec(struct kvmppc_vcore *vc, |
2583 | struct kvm_vcpu *vcpu, int wait_state) | |
371fefd6 | 2584 | { |
371fefd6 PM |
2585 | DEFINE_WAIT(wait); |
2586 | ||
19ccb76a | 2587 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
ec257165 PM |
2588 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
2589 | spin_unlock(&vc->lock); | |
19ccb76a | 2590 | schedule(); |
ec257165 PM |
2591 | spin_lock(&vc->lock); |
2592 | } | |
19ccb76a PM |
2593 | finish_wait(&vcpu->arch.cpu_run, &wait); |
2594 | } | |
2595 | ||
0cda69dd SJS |
2596 | static void grow_halt_poll_ns(struct kvmppc_vcore *vc) |
2597 | { | |
2598 | /* 10us base */ | |
2599 | if (vc->halt_poll_ns == 0 && halt_poll_ns_grow) | |
2600 | vc->halt_poll_ns = 10000; | |
2601 | else | |
2602 | vc->halt_poll_ns *= halt_poll_ns_grow; | |
0cda69dd SJS |
2603 | } |
2604 | ||
2605 | static void shrink_halt_poll_ns(struct kvmppc_vcore *vc) | |
2606 | { | |
2607 | if (halt_poll_ns_shrink == 0) | |
2608 | vc->halt_poll_ns = 0; | |
2609 | else | |
2610 | vc->halt_poll_ns /= halt_poll_ns_shrink; | |
2611 | } | |
2612 | ||
908a0935 SJS |
2613 | /* |
2614 | * Check to see if any of the runnable vcpus on the vcore have pending | |
0cda69dd SJS |
2615 | * exceptions or are no longer ceded |
2616 | */ | |
2617 | static int kvmppc_vcore_check_block(struct kvmppc_vcore *vc) | |
2618 | { | |
2619 | struct kvm_vcpu *vcpu; | |
2620 | int i; | |
2621 | ||
2622 | for_each_runnable_thread(i, vcpu, vc) { | |
2623 | if (vcpu->arch.pending_exceptions || !vcpu->arch.ceded) | |
2624 | return 1; | |
2625 | } | |
2626 | ||
2627 | return 0; | |
2628 | } | |
2629 | ||
19ccb76a PM |
2630 | /* |
2631 | * All the vcpus in this vcore are idle, so wait for a decrementer | |
2632 | * or external interrupt to one of the vcpus. vc->lock is held. | |
2633 | */ | |
2634 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) | |
2635 | { | |
2a27f514 | 2636 | ktime_t cur, start_poll, start_wait; |
0cda69dd | 2637 | int do_sleep = 1; |
0cda69dd | 2638 | u64 block_ns; |
8577370f | 2639 | DECLARE_SWAITQUEUE(wait); |
1bc5d59c | 2640 | |
0cda69dd | 2641 | /* Poll for pending exceptions and ceded state */ |
2a27f514 | 2642 | cur = start_poll = ktime_get(); |
0cda69dd | 2643 | if (vc->halt_poll_ns) { |
2a27f514 SJS |
2644 | ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns); |
2645 | ++vc->runner->stat.halt_attempted_poll; | |
1bc5d59c | 2646 | |
0cda69dd SJS |
2647 | vc->vcore_state = VCORE_POLLING; |
2648 | spin_unlock(&vc->lock); | |
2649 | ||
2650 | do { | |
2651 | if (kvmppc_vcore_check_block(vc)) { | |
2652 | do_sleep = 0; | |
2653 | break; | |
2654 | } | |
2655 | cur = ktime_get(); | |
2656 | } while (single_task_running() && ktime_before(cur, stop)); | |
2657 | ||
2658 | spin_lock(&vc->lock); | |
2659 | vc->vcore_state = VCORE_INACTIVE; | |
2660 | ||
2a27f514 SJS |
2661 | if (!do_sleep) { |
2662 | ++vc->runner->stat.halt_successful_poll; | |
0cda69dd | 2663 | goto out; |
2a27f514 | 2664 | } |
1bc5d59c SW |
2665 | } |
2666 | ||
0cda69dd SJS |
2667 | prepare_to_swait(&vc->wq, &wait, TASK_INTERRUPTIBLE); |
2668 | ||
2669 | if (kvmppc_vcore_check_block(vc)) { | |
8577370f | 2670 | finish_swait(&vc->wq, &wait); |
0cda69dd | 2671 | do_sleep = 0; |
2a27f514 SJS |
2672 | /* If we polled, count this as a successful poll */ |
2673 | if (vc->halt_poll_ns) | |
2674 | ++vc->runner->stat.halt_successful_poll; | |
0cda69dd | 2675 | goto out; |
1bc5d59c SW |
2676 | } |
2677 | ||
2a27f514 SJS |
2678 | start_wait = ktime_get(); |
2679 | ||
19ccb76a | 2680 | vc->vcore_state = VCORE_SLEEPING; |
3c78f78a | 2681 | trace_kvmppc_vcore_blocked(vc, 0); |
19ccb76a | 2682 | spin_unlock(&vc->lock); |
913d3ff9 | 2683 | schedule(); |
8577370f | 2684 | finish_swait(&vc->wq, &wait); |
19ccb76a PM |
2685 | spin_lock(&vc->lock); |
2686 | vc->vcore_state = VCORE_INACTIVE; | |
3c78f78a | 2687 | trace_kvmppc_vcore_blocked(vc, 1); |
2a27f514 | 2688 | ++vc->runner->stat.halt_successful_wait; |
0cda69dd SJS |
2689 | |
2690 | cur = ktime_get(); | |
2691 | ||
2692 | out: | |
2a27f514 SJS |
2693 | block_ns = ktime_to_ns(cur) - ktime_to_ns(start_poll); |
2694 | ||
2695 | /* Attribute wait time */ | |
2696 | if (do_sleep) { | |
2697 | vc->runner->stat.halt_wait_ns += | |
2698 | ktime_to_ns(cur) - ktime_to_ns(start_wait); | |
2699 | /* Attribute failed poll time */ | |
2700 | if (vc->halt_poll_ns) | |
2701 | vc->runner->stat.halt_poll_fail_ns += | |
2702 | ktime_to_ns(start_wait) - | |
2703 | ktime_to_ns(start_poll); | |
2704 | } else { | |
2705 | /* Attribute successful poll time */ | |
2706 | if (vc->halt_poll_ns) | |
2707 | vc->runner->stat.halt_poll_success_ns += | |
2708 | ktime_to_ns(cur) - | |
2709 | ktime_to_ns(start_poll); | |
2710 | } | |
0cda69dd SJS |
2711 | |
2712 | /* Adjust poll time */ | |
307d93e4 | 2713 | if (halt_poll_ns) { |
0cda69dd SJS |
2714 | if (block_ns <= vc->halt_poll_ns) |
2715 | ; | |
2716 | /* We slept and blocked for longer than the max halt time */ | |
307d93e4 | 2717 | else if (vc->halt_poll_ns && block_ns > halt_poll_ns) |
0cda69dd SJS |
2718 | shrink_halt_poll_ns(vc); |
2719 | /* We slept and our poll time is too small */ | |
307d93e4 SJS |
2720 | else if (vc->halt_poll_ns < halt_poll_ns && |
2721 | block_ns < halt_poll_ns) | |
0cda69dd | 2722 | grow_halt_poll_ns(vc); |
e03f3921 SJS |
2723 | if (vc->halt_poll_ns > halt_poll_ns) |
2724 | vc->halt_poll_ns = halt_poll_ns; | |
0cda69dd SJS |
2725 | } else |
2726 | vc->halt_poll_ns = 0; | |
2727 | ||
2728 | trace_kvmppc_vcore_wakeup(do_sleep, block_ns); | |
19ccb76a | 2729 | } |
371fefd6 | 2730 | |
19ccb76a PM |
2731 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
2732 | { | |
7b5f8272 | 2733 | int n_ceded, i; |
19ccb76a | 2734 | struct kvmppc_vcore *vc; |
7b5f8272 | 2735 | struct kvm_vcpu *v; |
9e368f29 | 2736 | |
3c78f78a SW |
2737 | trace_kvmppc_run_vcpu_enter(vcpu); |
2738 | ||
371fefd6 PM |
2739 | kvm_run->exit_reason = 0; |
2740 | vcpu->arch.ret = RESUME_GUEST; | |
2741 | vcpu->arch.trap = 0; | |
2f12f034 | 2742 | kvmppc_update_vpas(vcpu); |
371fefd6 | 2743 | |
371fefd6 PM |
2744 | /* |
2745 | * Synchronize with other threads in this virtual core | |
2746 | */ | |
2747 | vc = vcpu->arch.vcore; | |
2748 | spin_lock(&vc->lock); | |
19ccb76a | 2749 | vcpu->arch.ceded = 0; |
371fefd6 PM |
2750 | vcpu->arch.run_task = current; |
2751 | vcpu->arch.kvm_run = kvm_run; | |
c7b67670 | 2752 | vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); |
19ccb76a | 2753 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
c7b67670 | 2754 | vcpu->arch.busy_preempt = TB_NIL; |
7b5f8272 | 2755 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], vcpu); |
371fefd6 PM |
2756 | ++vc->n_runnable; |
2757 | ||
19ccb76a PM |
2758 | /* |
2759 | * This happens the first time this is called for a vcpu. | |
2760 | * If the vcore is already running, we may be able to start | |
2761 | * this thread straight away and have it join in. | |
2762 | */ | |
8455d79e | 2763 | if (!signal_pending(current)) { |
ec257165 PM |
2764 | if (vc->vcore_state == VCORE_PIGGYBACK) { |
2765 | struct kvmppc_vcore *mvc = vc->master_vcore; | |
2766 | if (spin_trylock(&mvc->lock)) { | |
2767 | if (mvc->vcore_state == VCORE_RUNNING && | |
2768 | !VCORE_IS_EXITING(mvc)) { | |
2769 | kvmppc_create_dtl_entry(vcpu, vc); | |
b4deba5c | 2770 | kvmppc_start_thread(vcpu, vc); |
ec257165 PM |
2771 | trace_kvm_guest_enter(vcpu); |
2772 | } | |
2773 | spin_unlock(&mvc->lock); | |
2774 | } | |
2775 | } else if (vc->vcore_state == VCORE_RUNNING && | |
2776 | !VCORE_IS_EXITING(vc)) { | |
2f12f034 | 2777 | kvmppc_create_dtl_entry(vcpu, vc); |
b4deba5c | 2778 | kvmppc_start_thread(vcpu, vc); |
3c78f78a | 2779 | trace_kvm_guest_enter(vcpu); |
8455d79e | 2780 | } else if (vc->vcore_state == VCORE_SLEEPING) { |
8577370f | 2781 | swake_up(&vc->wq); |
371fefd6 PM |
2782 | } |
2783 | ||
8455d79e | 2784 | } |
371fefd6 | 2785 | |
19ccb76a PM |
2786 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2787 | !signal_pending(current)) { | |
ec257165 PM |
2788 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
2789 | kvmppc_vcore_end_preempt(vc); | |
2790 | ||
8455d79e | 2791 | if (vc->vcore_state != VCORE_INACTIVE) { |
ec257165 | 2792 | kvmppc_wait_for_exec(vc, vcpu, TASK_INTERRUPTIBLE); |
19ccb76a PM |
2793 | continue; |
2794 | } | |
7b5f8272 | 2795 | for_each_runnable_thread(i, v, vc) { |
7e28e60e | 2796 | kvmppc_core_prepare_to_enter(v); |
19ccb76a PM |
2797 | if (signal_pending(v->arch.run_task)) { |
2798 | kvmppc_remove_runnable(vc, v); | |
2799 | v->stat.signal_exits++; | |
2800 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; | |
2801 | v->arch.ret = -EINTR; | |
2802 | wake_up(&v->arch.cpu_run); | |
2803 | } | |
2804 | } | |
8455d79e PM |
2805 | if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
2806 | break; | |
8455d79e | 2807 | n_ceded = 0; |
7b5f8272 | 2808 | for_each_runnable_thread(i, v, vc) { |
8455d79e PM |
2809 | if (!v->arch.pending_exceptions) |
2810 | n_ceded += v->arch.ceded; | |
4619ac88 PM |
2811 | else |
2812 | v->arch.ceded = 0; | |
2813 | } | |
25fedfca PM |
2814 | vc->runner = vcpu; |
2815 | if (n_ceded == vc->n_runnable) { | |
8455d79e | 2816 | kvmppc_vcore_blocked(vc); |
c56dadf3 | 2817 | } else if (need_resched()) { |
ec257165 | 2818 | kvmppc_vcore_preempt(vc); |
25fedfca PM |
2819 | /* Let something else run */ |
2820 | cond_resched_lock(&vc->lock); | |
ec257165 PM |
2821 | if (vc->vcore_state == VCORE_PREEMPT) |
2822 | kvmppc_vcore_end_preempt(vc); | |
25fedfca | 2823 | } else { |
8455d79e | 2824 | kvmppc_run_core(vc); |
25fedfca | 2825 | } |
0456ec4f | 2826 | vc->runner = NULL; |
19ccb76a | 2827 | } |
371fefd6 | 2828 | |
8455d79e PM |
2829 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2830 | (vc->vcore_state == VCORE_RUNNING || | |
5fc3e64f PM |
2831 | vc->vcore_state == VCORE_EXITING || |
2832 | vc->vcore_state == VCORE_PIGGYBACK)) | |
ec257165 | 2833 | kvmppc_wait_for_exec(vc, vcpu, TASK_UNINTERRUPTIBLE); |
8455d79e | 2834 | |
5fc3e64f PM |
2835 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
2836 | kvmppc_vcore_end_preempt(vc); | |
2837 | ||
8455d79e PM |
2838 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
2839 | kvmppc_remove_runnable(vc, vcpu); | |
2840 | vcpu->stat.signal_exits++; | |
2841 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
2842 | vcpu->arch.ret = -EINTR; | |
2843 | } | |
2844 | ||
2845 | if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { | |
2846 | /* Wake up some vcpu to run the core */ | |
7b5f8272 SJS |
2847 | i = -1; |
2848 | v = next_runnable_thread(vc, &i); | |
8455d79e | 2849 | wake_up(&v->arch.cpu_run); |
371fefd6 PM |
2850 | } |
2851 | ||
3c78f78a | 2852 | trace_kvmppc_run_vcpu_exit(vcpu, kvm_run); |
371fefd6 | 2853 | spin_unlock(&vc->lock); |
371fefd6 | 2854 | return vcpu->arch.ret; |
de56a948 PM |
2855 | } |
2856 | ||
3a167bea | 2857 | static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu) |
a8606e20 PM |
2858 | { |
2859 | int r; | |
913d3ff9 | 2860 | int srcu_idx; |
a8606e20 | 2861 | |
af8f38b3 AG |
2862 | if (!vcpu->arch.sane) { |
2863 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
2864 | return -EINVAL; | |
2865 | } | |
2866 | ||
25051b5a SW |
2867 | kvmppc_core_prepare_to_enter(vcpu); |
2868 | ||
19ccb76a PM |
2869 | /* No need to go into the guest when all we'll do is come back out */ |
2870 | if (signal_pending(current)) { | |
2871 | run->exit_reason = KVM_EXIT_INTR; | |
2872 | return -EINTR; | |
2873 | } | |
2874 | ||
32fad281 | 2875 | atomic_inc(&vcpu->kvm->arch.vcpus_running); |
31037eca | 2876 | /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */ |
32fad281 PM |
2877 | smp_mb(); |
2878 | ||
c17b98cf | 2879 | /* On the first time here, set up HTAB and VRMA */ |
31037eca | 2880 | if (!vcpu->kvm->arch.hpte_setup_done) { |
32fad281 | 2881 | r = kvmppc_hv_setup_htab_rma(vcpu); |
c77162de | 2882 | if (r) |
32fad281 | 2883 | goto out; |
c77162de | 2884 | } |
19ccb76a | 2885 | |
579e633e AB |
2886 | flush_all_to_thread(current); |
2887 | ||
19ccb76a | 2888 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; |
342d3db7 | 2889 | vcpu->arch.pgdir = current->mm->pgd; |
c7b67670 | 2890 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
19ccb76a | 2891 | |
a8606e20 PM |
2892 | do { |
2893 | r = kvmppc_run_vcpu(run, vcpu); | |
2894 | ||
2895 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && | |
2896 | !(vcpu->arch.shregs.msr & MSR_PR)) { | |
3c78f78a | 2897 | trace_kvm_hcall_enter(vcpu); |
a8606e20 | 2898 | r = kvmppc_pseries_do_hcall(vcpu); |
3c78f78a | 2899 | trace_kvm_hcall_exit(vcpu, r); |
7e28e60e | 2900 | kvmppc_core_prepare_to_enter(vcpu); |
913d3ff9 PM |
2901 | } else if (r == RESUME_PAGE_FAULT) { |
2902 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2903 | r = kvmppc_book3s_hv_page_fault(run, vcpu, | |
2904 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
2905 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
f7af5209 SW |
2906 | } else if (r == RESUME_PASSTHROUGH) |
2907 | r = kvmppc_xics_rm_complete(vcpu, 0); | |
e59d24e6 | 2908 | } while (is_kvmppc_resume_guest(r)); |
32fad281 PM |
2909 | |
2910 | out: | |
c7b67670 | 2911 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
32fad281 | 2912 | atomic_dec(&vcpu->kvm->arch.vcpus_running); |
a8606e20 PM |
2913 | return r; |
2914 | } | |
2915 | ||
5b74716e BH |
2916 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
2917 | int linux_psize) | |
2918 | { | |
2919 | struct mmu_psize_def *def = &mmu_psize_defs[linux_psize]; | |
2920 | ||
2921 | if (!def->shift) | |
2922 | return; | |
2923 | (*sps)->page_shift = def->shift; | |
2924 | (*sps)->slb_enc = def->sllp; | |
2925 | (*sps)->enc[0].page_shift = def->shift; | |
b1022fbd | 2926 | (*sps)->enc[0].pte_enc = def->penc[linux_psize]; |
1f365bb0 AK |
2927 | /* |
2928 | * Add 16MB MPSS support if host supports it | |
2929 | */ | |
2930 | if (linux_psize != MMU_PAGE_16M && def->penc[MMU_PAGE_16M] != -1) { | |
2931 | (*sps)->enc[1].page_shift = 24; | |
2932 | (*sps)->enc[1].pte_enc = def->penc[MMU_PAGE_16M]; | |
2933 | } | |
5b74716e BH |
2934 | (*sps)++; |
2935 | } | |
2936 | ||
3a167bea AK |
2937 | static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm, |
2938 | struct kvm_ppc_smmu_info *info) | |
5b74716e BH |
2939 | { |
2940 | struct kvm_ppc_one_seg_page_size *sps; | |
2941 | ||
2942 | info->flags = KVM_PPC_PAGE_SIZES_REAL; | |
2943 | if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) | |
2944 | info->flags |= KVM_PPC_1T_SEGMENTS; | |
2945 | info->slb_size = mmu_slb_size; | |
2946 | ||
2947 | /* We only support these sizes for now, and no muti-size segments */ | |
2948 | sps = &info->sps[0]; | |
2949 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K); | |
2950 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K); | |
2951 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M); | |
2952 | ||
2953 | return 0; | |
2954 | } | |
2955 | ||
82ed3616 PM |
2956 | /* |
2957 | * Get (and clear) the dirty memory log for a memory slot. | |
2958 | */ | |
3a167bea AK |
2959 | static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm, |
2960 | struct kvm_dirty_log *log) | |
82ed3616 | 2961 | { |
9f6b8029 | 2962 | struct kvm_memslots *slots; |
82ed3616 PM |
2963 | struct kvm_memory_slot *memslot; |
2964 | int r; | |
2965 | unsigned long n; | |
2966 | ||
2967 | mutex_lock(&kvm->slots_lock); | |
2968 | ||
2969 | r = -EINVAL; | |
bbacc0c1 | 2970 | if (log->slot >= KVM_USER_MEM_SLOTS) |
82ed3616 PM |
2971 | goto out; |
2972 | ||
9f6b8029 PB |
2973 | slots = kvm_memslots(kvm); |
2974 | memslot = id_to_memslot(slots, log->slot); | |
82ed3616 PM |
2975 | r = -ENOENT; |
2976 | if (!memslot->dirty_bitmap) | |
2977 | goto out; | |
2978 | ||
2979 | n = kvm_dirty_bitmap_bytes(memslot); | |
2980 | memset(memslot->dirty_bitmap, 0, n); | |
2981 | ||
dfe49dbd | 2982 | r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap); |
82ed3616 PM |
2983 | if (r) |
2984 | goto out; | |
2985 | ||
2986 | r = -EFAULT; | |
2987 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
2988 | goto out; | |
2989 | ||
2990 | r = 0; | |
2991 | out: | |
2992 | mutex_unlock(&kvm->slots_lock); | |
2993 | return r; | |
2994 | } | |
2995 | ||
3a167bea AK |
2996 | static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free, |
2997 | struct kvm_memory_slot *dont) | |
a66b48c3 PM |
2998 | { |
2999 | if (!dont || free->arch.rmap != dont->arch.rmap) { | |
3000 | vfree(free->arch.rmap); | |
3001 | free->arch.rmap = NULL; | |
b2b2f165 | 3002 | } |
a66b48c3 PM |
3003 | } |
3004 | ||
3a167bea AK |
3005 | static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot, |
3006 | unsigned long npages) | |
a66b48c3 PM |
3007 | { |
3008 | slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); | |
3009 | if (!slot->arch.rmap) | |
3010 | return -ENOMEM; | |
aa04b4cc | 3011 | |
c77162de PM |
3012 | return 0; |
3013 | } | |
aa04b4cc | 3014 | |
3a167bea AK |
3015 | static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, |
3016 | struct kvm_memory_slot *memslot, | |
09170a49 | 3017 | const struct kvm_userspace_memory_region *mem) |
c77162de | 3018 | { |
a66b48c3 | 3019 | return 0; |
c77162de PM |
3020 | } |
3021 | ||
3a167bea | 3022 | static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, |
09170a49 | 3023 | const struct kvm_userspace_memory_region *mem, |
f36f3f28 PB |
3024 | const struct kvm_memory_slot *old, |
3025 | const struct kvm_memory_slot *new) | |
c77162de | 3026 | { |
dfe49dbd | 3027 | unsigned long npages = mem->memory_size >> PAGE_SHIFT; |
9f6b8029 | 3028 | struct kvm_memslots *slots; |
dfe49dbd PM |
3029 | struct kvm_memory_slot *memslot; |
3030 | ||
a56ee9f8 YX |
3031 | /* |
3032 | * If we are making a new memslot, it might make | |
3033 | * some address that was previously cached as emulated | |
3034 | * MMIO be no longer emulated MMIO, so invalidate | |
3035 | * all the caches of emulated MMIO translations. | |
3036 | */ | |
3037 | if (npages) | |
3038 | atomic64_inc(&kvm->arch.mmio_update); | |
3039 | ||
8482644a | 3040 | if (npages && old->npages) { |
dfe49dbd PM |
3041 | /* |
3042 | * If modifying a memslot, reset all the rmap dirty bits. | |
3043 | * If this is a new memslot, we don't need to do anything | |
3044 | * since the rmap array starts out as all zeroes, | |
3045 | * i.e. no pages are dirty. | |
3046 | */ | |
9f6b8029 PB |
3047 | slots = kvm_memslots(kvm); |
3048 | memslot = id_to_memslot(slots, mem->slot); | |
dfe49dbd PM |
3049 | kvmppc_hv_get_dirty_log(kvm, memslot, NULL); |
3050 | } | |
c77162de PM |
3051 | } |
3052 | ||
a0144e2a PM |
3053 | /* |
3054 | * Update LPCR values in kvm->arch and in vcores. | |
3055 | * Caller must hold kvm->lock. | |
3056 | */ | |
3057 | void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask) | |
3058 | { | |
3059 | long int i; | |
3060 | u32 cores_done = 0; | |
3061 | ||
3062 | if ((kvm->arch.lpcr & mask) == lpcr) | |
3063 | return; | |
3064 | ||
3065 | kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr; | |
3066 | ||
3067 | for (i = 0; i < KVM_MAX_VCORES; ++i) { | |
3068 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; | |
3069 | if (!vc) | |
3070 | continue; | |
3071 | spin_lock(&vc->lock); | |
3072 | vc->lpcr = (vc->lpcr & ~mask) | lpcr; | |
3073 | spin_unlock(&vc->lock); | |
3074 | if (++cores_done >= kvm->arch.online_vcores) | |
3075 | break; | |
3076 | } | |
3077 | } | |
3078 | ||
3a167bea AK |
3079 | static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu) |
3080 | { | |
3081 | return; | |
3082 | } | |
3083 | ||
7a84084c PM |
3084 | static void kvmppc_setup_partition_table(struct kvm *kvm) |
3085 | { | |
3086 | unsigned long dw0, dw1; | |
3087 | ||
3088 | /* PS field - page size for VRMA */ | |
3089 | dw0 = ((kvm->arch.vrma_slb_v & SLB_VSID_L) >> 1) | | |
3090 | ((kvm->arch.vrma_slb_v & SLB_VSID_LP) << 1); | |
3091 | /* HTABSIZE and HTABORG fields */ | |
3092 | dw0 |= kvm->arch.sdr1; | |
3093 | ||
3094 | /* Second dword has GR=0; other fields are unused since UPRT=0 */ | |
3095 | dw1 = 0; | |
3096 | ||
3097 | mmu_partition_table_set_entry(kvm->arch.lpid, dw0, dw1); | |
3098 | } | |
3099 | ||
32fad281 | 3100 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
c77162de PM |
3101 | { |
3102 | int err = 0; | |
3103 | struct kvm *kvm = vcpu->kvm; | |
c77162de PM |
3104 | unsigned long hva; |
3105 | struct kvm_memory_slot *memslot; | |
3106 | struct vm_area_struct *vma; | |
a0144e2a | 3107 | unsigned long lpcr = 0, senc; |
c77162de | 3108 | unsigned long psize, porder; |
2c9097e4 | 3109 | int srcu_idx; |
c77162de PM |
3110 | |
3111 | mutex_lock(&kvm->lock); | |
31037eca | 3112 | if (kvm->arch.hpte_setup_done) |
c77162de | 3113 | goto out; /* another vcpu beat us to it */ |
aa04b4cc | 3114 | |
32fad281 PM |
3115 | /* Allocate hashed page table (if not done already) and reset it */ |
3116 | if (!kvm->arch.hpt_virt) { | |
3117 | err = kvmppc_alloc_hpt(kvm, NULL); | |
3118 | if (err) { | |
3119 | pr_err("KVM: Couldn't alloc HPT\n"); | |
3120 | goto out; | |
3121 | } | |
3122 | } | |
3123 | ||
c77162de | 3124 | /* Look up the memslot for guest physical address 0 */ |
2c9097e4 | 3125 | srcu_idx = srcu_read_lock(&kvm->srcu); |
c77162de | 3126 | memslot = gfn_to_memslot(kvm, 0); |
aa04b4cc | 3127 | |
c77162de PM |
3128 | /* We must have some memory at 0 by now */ |
3129 | err = -EINVAL; | |
3130 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) | |
2c9097e4 | 3131 | goto out_srcu; |
c77162de PM |
3132 | |
3133 | /* Look up the VMA for the start of this memory slot */ | |
3134 | hva = memslot->userspace_addr; | |
3135 | down_read(¤t->mm->mmap_sem); | |
3136 | vma = find_vma(current->mm, hva); | |
3137 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) | |
3138 | goto up_out; | |
3139 | ||
3140 | psize = vma_kernel_pagesize(vma); | |
da9d1d7f | 3141 | porder = __ilog2(psize); |
c77162de | 3142 | |
c77162de PM |
3143 | up_read(¤t->mm->mmap_sem); |
3144 | ||
c17b98cf PM |
3145 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
3146 | err = -EINVAL; | |
3147 | if (!(psize == 0x1000 || psize == 0x10000 || | |
3148 | psize == 0x1000000)) | |
3149 | goto out_srcu; | |
c77162de | 3150 | |
c17b98cf PM |
3151 | senc = slb_pgsize_encoding(psize); |
3152 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | | |
3153 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
c17b98cf PM |
3154 | /* Create HPTEs in the hash page table for the VRMA */ |
3155 | kvmppc_map_vrma(vcpu, memslot, porder); | |
aa04b4cc | 3156 | |
7a84084c PM |
3157 | /* Update VRMASD field in the LPCR */ |
3158 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) { | |
3159 | /* the -4 is to account for senc values starting at 0x10 */ | |
3160 | lpcr = senc << (LPCR_VRMASD_SH - 4); | |
3161 | kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD); | |
3162 | } else { | |
3163 | kvmppc_setup_partition_table(kvm); | |
3164 | } | |
a0144e2a | 3165 | |
31037eca | 3166 | /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */ |
c77162de | 3167 | smp_wmb(); |
31037eca | 3168 | kvm->arch.hpte_setup_done = 1; |
c77162de | 3169 | err = 0; |
2c9097e4 PM |
3170 | out_srcu: |
3171 | srcu_read_unlock(&kvm->srcu, srcu_idx); | |
c77162de PM |
3172 | out: |
3173 | mutex_unlock(&kvm->lock); | |
3174 | return err; | |
b2b2f165 | 3175 | |
c77162de PM |
3176 | up_out: |
3177 | up_read(¤t->mm->mmap_sem); | |
505d6421 | 3178 | goto out_srcu; |
de56a948 PM |
3179 | } |
3180 | ||
79b6c247 SW |
3181 | #ifdef CONFIG_KVM_XICS |
3182 | /* | |
3183 | * Allocate a per-core structure for managing state about which cores are | |
3184 | * running in the host versus the guest and for exchanging data between | |
3185 | * real mode KVM and CPU running in the host. | |
3186 | * This is only done for the first VM. | |
3187 | * The allocated structure stays even if all VMs have stopped. | |
3188 | * It is only freed when the kvm-hv module is unloaded. | |
3189 | * It's OK for this routine to fail, we just don't support host | |
3190 | * core operations like redirecting H_IPI wakeups. | |
3191 | */ | |
3192 | void kvmppc_alloc_host_rm_ops(void) | |
3193 | { | |
3194 | struct kvmppc_host_rm_ops *ops; | |
3195 | unsigned long l_ops; | |
3196 | int cpu, core; | |
3197 | int size; | |
3198 | ||
3199 | /* Not the first time here ? */ | |
3200 | if (kvmppc_host_rm_ops_hv != NULL) | |
3201 | return; | |
3202 | ||
3203 | ops = kzalloc(sizeof(struct kvmppc_host_rm_ops), GFP_KERNEL); | |
3204 | if (!ops) | |
3205 | return; | |
3206 | ||
3207 | size = cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core); | |
3208 | ops->rm_core = kzalloc(size, GFP_KERNEL); | |
3209 | ||
3210 | if (!ops->rm_core) { | |
3211 | kfree(ops); | |
3212 | return; | |
3213 | } | |
3214 | ||
6f3bb809 SW |
3215 | get_online_cpus(); |
3216 | ||
79b6c247 SW |
3217 | for (cpu = 0; cpu < nr_cpu_ids; cpu += threads_per_core) { |
3218 | if (!cpu_online(cpu)) | |
3219 | continue; | |
3220 | ||
3221 | core = cpu >> threads_shift; | |
3222 | ops->rm_core[core].rm_state.in_host = 1; | |
3223 | } | |
3224 | ||
0c2a6606 SW |
3225 | ops->vcpu_kick = kvmppc_fast_vcpu_kick_hv; |
3226 | ||
79b6c247 SW |
3227 | /* |
3228 | * Make the contents of the kvmppc_host_rm_ops structure visible | |
3229 | * to other CPUs before we assign it to the global variable. | |
3230 | * Do an atomic assignment (no locks used here), but if someone | |
3231 | * beats us to it, just free our copy and return. | |
3232 | */ | |
3233 | smp_wmb(); | |
3234 | l_ops = (unsigned long) ops; | |
3235 | ||
3236 | if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv, 0, l_ops)) { | |
6f3bb809 | 3237 | put_online_cpus(); |
79b6c247 SW |
3238 | kfree(ops->rm_core); |
3239 | kfree(ops); | |
6f3bb809 | 3240 | return; |
79b6c247 | 3241 | } |
6f3bb809 | 3242 | |
3f7cd919 AMG |
3243 | cpuhp_setup_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE, |
3244 | "ppc/kvm_book3s:prepare", | |
3245 | kvmppc_set_host_core, | |
3246 | kvmppc_clear_host_core); | |
6f3bb809 | 3247 | put_online_cpus(); |
79b6c247 SW |
3248 | } |
3249 | ||
3250 | void kvmppc_free_host_rm_ops(void) | |
3251 | { | |
3252 | if (kvmppc_host_rm_ops_hv) { | |
3f7cd919 | 3253 | cpuhp_remove_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE); |
79b6c247 SW |
3254 | kfree(kvmppc_host_rm_ops_hv->rm_core); |
3255 | kfree(kvmppc_host_rm_ops_hv); | |
3256 | kvmppc_host_rm_ops_hv = NULL; | |
3257 | } | |
3258 | } | |
3259 | #endif | |
3260 | ||
3a167bea | 3261 | static int kvmppc_core_init_vm_hv(struct kvm *kvm) |
de56a948 | 3262 | { |
32fad281 | 3263 | unsigned long lpcr, lpid; |
e23a808b | 3264 | char buf[32]; |
de56a948 | 3265 | |
32fad281 PM |
3266 | /* Allocate the guest's logical partition ID */ |
3267 | ||
3268 | lpid = kvmppc_alloc_lpid(); | |
5d226ae5 | 3269 | if ((long)lpid < 0) |
32fad281 PM |
3270 | return -ENOMEM; |
3271 | kvm->arch.lpid = lpid; | |
de56a948 | 3272 | |
79b6c247 SW |
3273 | kvmppc_alloc_host_rm_ops(); |
3274 | ||
1b400ba0 PM |
3275 | /* |
3276 | * Since we don't flush the TLB when tearing down a VM, | |
3277 | * and this lpid might have previously been used, | |
3278 | * make sure we flush on each core before running the new VM. | |
7c5b06ca PM |
3279 | * On POWER9, the tlbie in mmu_partition_table_set_entry() |
3280 | * does this flush for us. | |
1b400ba0 | 3281 | */ |
7c5b06ca PM |
3282 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3283 | cpumask_setall(&kvm->arch.need_tlb_flush); | |
1b400ba0 | 3284 | |
699a0ea0 PM |
3285 | /* Start out with the default set of hcalls enabled */ |
3286 | memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls, | |
3287 | sizeof(kvm->arch.enabled_hcalls)); | |
3288 | ||
7a84084c PM |
3289 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3290 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); | |
aa04b4cc | 3291 | |
c17b98cf PM |
3292 | /* Init LPCR for virtual RMA mode */ |
3293 | kvm->arch.host_lpid = mfspr(SPRN_LPID); | |
3294 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); | |
3295 | lpcr &= LPCR_PECE | LPCR_LPES; | |
3296 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | | |
3297 | LPCR_VPM0 | LPCR_VPM1; | |
3298 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | | |
3299 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
3300 | /* On POWER8 turn on online bit to enable PURR/SPURR */ | |
3301 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
3302 | lpcr |= LPCR_ONL; | |
84f7139c PM |
3303 | /* |
3304 | * On POWER9, VPM0 bit is reserved (VPM0=1 behaviour is assumed) | |
3305 | * Set HVICE bit to enable hypervisor virtualization interrupts. | |
3306 | */ | |
3307 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { | |
7a84084c | 3308 | lpcr &= ~LPCR_VPM0; |
84f7139c PM |
3309 | lpcr |= LPCR_HVICE; |
3310 | } | |
3311 | ||
9e368f29 | 3312 | kvm->arch.lpcr = lpcr; |
aa04b4cc | 3313 | |
7c5b06ca PM |
3314 | /* |
3315 | * Work out how many sets the TLB has, for the use of | |
3316 | * the TLB invalidation loop in book3s_hv_rmhandlers.S. | |
3317 | */ | |
3318 | if (cpu_has_feature(CPU_FTR_ARCH_300)) | |
3319 | kvm->arch.tlb_sets = POWER9_TLB_SETS_HASH; /* 256 */ | |
3320 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
3321 | kvm->arch.tlb_sets = POWER8_TLB_SETS; /* 512 */ | |
3322 | else | |
3323 | kvm->arch.tlb_sets = POWER7_TLB_SETS; /* 128 */ | |
3324 | ||
512691d4 | 3325 | /* |
441c19c8 ME |
3326 | * Track that we now have a HV mode VM active. This blocks secondary |
3327 | * CPU threads from coming online. | |
512691d4 | 3328 | */ |
441c19c8 | 3329 | kvm_hv_vm_activated(); |
512691d4 | 3330 | |
e23a808b PM |
3331 | /* |
3332 | * Create a debugfs directory for the VM | |
3333 | */ | |
3334 | snprintf(buf, sizeof(buf), "vm%d", current->pid); | |
3335 | kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir); | |
3336 | if (!IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
3337 | kvmppc_mmu_debugfs_init(kvm); | |
3338 | ||
54738c09 | 3339 | return 0; |
de56a948 PM |
3340 | } |
3341 | ||
f1378b1c PM |
3342 | static void kvmppc_free_vcores(struct kvm *kvm) |
3343 | { | |
3344 | long int i; | |
3345 | ||
23316316 | 3346 | for (i = 0; i < KVM_MAX_VCORES; ++i) |
f1378b1c PM |
3347 | kfree(kvm->arch.vcores[i]); |
3348 | kvm->arch.online_vcores = 0; | |
3349 | } | |
3350 | ||
3a167bea | 3351 | static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) |
de56a948 | 3352 | { |
e23a808b PM |
3353 | debugfs_remove_recursive(kvm->arch.debugfs_dir); |
3354 | ||
441c19c8 | 3355 | kvm_hv_vm_deactivated(); |
512691d4 | 3356 | |
f1378b1c | 3357 | kvmppc_free_vcores(kvm); |
aa04b4cc | 3358 | |
de56a948 | 3359 | kvmppc_free_hpt(kvm); |
c57875f5 SW |
3360 | |
3361 | kvmppc_free_pimap(kvm); | |
de56a948 PM |
3362 | } |
3363 | ||
3a167bea AK |
3364 | /* We don't need to emulate any privileged instructions or dcbz */ |
3365 | static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
3366 | unsigned int inst, int *advance) | |
de56a948 | 3367 | { |
3a167bea | 3368 | return EMULATE_FAIL; |
de56a948 PM |
3369 | } |
3370 | ||
3a167bea AK |
3371 | static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn, |
3372 | ulong spr_val) | |
de56a948 PM |
3373 | { |
3374 | return EMULATE_FAIL; | |
3375 | } | |
3376 | ||
3a167bea AK |
3377 | static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn, |
3378 | ulong *spr_val) | |
de56a948 PM |
3379 | { |
3380 | return EMULATE_FAIL; | |
3381 | } | |
3382 | ||
3a167bea | 3383 | static int kvmppc_core_check_processor_compat_hv(void) |
de56a948 | 3384 | { |
c17b98cf PM |
3385 | if (!cpu_has_feature(CPU_FTR_HVMODE) || |
3386 | !cpu_has_feature(CPU_FTR_ARCH_206)) | |
3a167bea | 3387 | return -EIO; |
50de596d | 3388 | /* |
45c940ba | 3389 | * Disable KVM for Power9 in radix mode. |
50de596d | 3390 | */ |
45c940ba | 3391 | if (cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled()) |
50de596d AK |
3392 | return -EIO; |
3393 | ||
3a167bea | 3394 | return 0; |
de56a948 PM |
3395 | } |
3396 | ||
8daaafc8 SW |
3397 | #ifdef CONFIG_KVM_XICS |
3398 | ||
3399 | void kvmppc_free_pimap(struct kvm *kvm) | |
3400 | { | |
3401 | kfree(kvm->arch.pimap); | |
3402 | } | |
3403 | ||
c57875f5 | 3404 | static struct kvmppc_passthru_irqmap *kvmppc_alloc_pimap(void) |
8daaafc8 SW |
3405 | { |
3406 | return kzalloc(sizeof(struct kvmppc_passthru_irqmap), GFP_KERNEL); | |
3407 | } | |
c57875f5 SW |
3408 | |
3409 | static int kvmppc_set_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) | |
3410 | { | |
3411 | struct irq_desc *desc; | |
3412 | struct kvmppc_irq_map *irq_map; | |
3413 | struct kvmppc_passthru_irqmap *pimap; | |
3414 | struct irq_chip *chip; | |
3415 | int i; | |
3416 | ||
644abbb2 SW |
3417 | if (!kvm_irq_bypass) |
3418 | return 1; | |
3419 | ||
c57875f5 SW |
3420 | desc = irq_to_desc(host_irq); |
3421 | if (!desc) | |
3422 | return -EIO; | |
3423 | ||
3424 | mutex_lock(&kvm->lock); | |
3425 | ||
3426 | pimap = kvm->arch.pimap; | |
3427 | if (pimap == NULL) { | |
3428 | /* First call, allocate structure to hold IRQ map */ | |
3429 | pimap = kvmppc_alloc_pimap(); | |
3430 | if (pimap == NULL) { | |
3431 | mutex_unlock(&kvm->lock); | |
3432 | return -ENOMEM; | |
3433 | } | |
3434 | kvm->arch.pimap = pimap; | |
3435 | } | |
3436 | ||
3437 | /* | |
3438 | * For now, we only support interrupts for which the EOI operation | |
3439 | * is an OPAL call followed by a write to XIRR, since that's | |
3440 | * what our real-mode EOI code does. | |
3441 | */ | |
3442 | chip = irq_data_get_irq_chip(&desc->irq_data); | |
3443 | if (!chip || !is_pnv_opal_msi(chip)) { | |
3444 | pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n", | |
3445 | host_irq, guest_gsi); | |
3446 | mutex_unlock(&kvm->lock); | |
3447 | return -ENOENT; | |
3448 | } | |
3449 | ||
3450 | /* | |
3451 | * See if we already have an entry for this guest IRQ number. | |
3452 | * If it's mapped to a hardware IRQ number, that's an error, | |
3453 | * otherwise re-use this entry. | |
3454 | */ | |
3455 | for (i = 0; i < pimap->n_mapped; i++) { | |
3456 | if (guest_gsi == pimap->mapped[i].v_hwirq) { | |
3457 | if (pimap->mapped[i].r_hwirq) { | |
3458 | mutex_unlock(&kvm->lock); | |
3459 | return -EINVAL; | |
3460 | } | |
3461 | break; | |
3462 | } | |
3463 | } | |
3464 | ||
3465 | if (i == KVMPPC_PIRQ_MAPPED) { | |
3466 | mutex_unlock(&kvm->lock); | |
3467 | return -EAGAIN; /* table is full */ | |
3468 | } | |
3469 | ||
3470 | irq_map = &pimap->mapped[i]; | |
3471 | ||
3472 | irq_map->v_hwirq = guest_gsi; | |
c57875f5 SW |
3473 | irq_map->desc = desc; |
3474 | ||
e3c13e56 SW |
3475 | /* |
3476 | * Order the above two stores before the next to serialize with | |
3477 | * the KVM real mode handler. | |
3478 | */ | |
3479 | smp_wmb(); | |
3480 | irq_map->r_hwirq = desc->irq_data.hwirq; | |
3481 | ||
c57875f5 SW |
3482 | if (i == pimap->n_mapped) |
3483 | pimap->n_mapped++; | |
3484 | ||
5d375199 PM |
3485 | kvmppc_xics_set_mapped(kvm, guest_gsi, desc->irq_data.hwirq); |
3486 | ||
c57875f5 SW |
3487 | mutex_unlock(&kvm->lock); |
3488 | ||
3489 | return 0; | |
3490 | } | |
3491 | ||
3492 | static int kvmppc_clr_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) | |
3493 | { | |
3494 | struct irq_desc *desc; | |
3495 | struct kvmppc_passthru_irqmap *pimap; | |
3496 | int i; | |
3497 | ||
644abbb2 SW |
3498 | if (!kvm_irq_bypass) |
3499 | return 0; | |
3500 | ||
c57875f5 SW |
3501 | desc = irq_to_desc(host_irq); |
3502 | if (!desc) | |
3503 | return -EIO; | |
3504 | ||
3505 | mutex_lock(&kvm->lock); | |
3506 | ||
3507 | if (kvm->arch.pimap == NULL) { | |
3508 | mutex_unlock(&kvm->lock); | |
3509 | return 0; | |
3510 | } | |
3511 | pimap = kvm->arch.pimap; | |
3512 | ||
3513 | for (i = 0; i < pimap->n_mapped; i++) { | |
3514 | if (guest_gsi == pimap->mapped[i].v_hwirq) | |
3515 | break; | |
3516 | } | |
3517 | ||
3518 | if (i == pimap->n_mapped) { | |
3519 | mutex_unlock(&kvm->lock); | |
3520 | return -ENODEV; | |
3521 | } | |
3522 | ||
5d375199 PM |
3523 | kvmppc_xics_clr_mapped(kvm, guest_gsi, pimap->mapped[i].r_hwirq); |
3524 | ||
c57875f5 SW |
3525 | /* invalidate the entry */ |
3526 | pimap->mapped[i].r_hwirq = 0; | |
3527 | ||
3528 | /* | |
3529 | * We don't free this structure even when the count goes to | |
3530 | * zero. The structure is freed when we destroy the VM. | |
3531 | */ | |
3532 | ||
3533 | mutex_unlock(&kvm->lock); | |
3534 | return 0; | |
3535 | } | |
3536 | ||
3537 | static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer *cons, | |
3538 | struct irq_bypass_producer *prod) | |
3539 | { | |
3540 | int ret = 0; | |
3541 | struct kvm_kernel_irqfd *irqfd = | |
3542 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
3543 | ||
3544 | irqfd->producer = prod; | |
3545 | ||
3546 | ret = kvmppc_set_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); | |
3547 | if (ret) | |
3548 | pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n", | |
3549 | prod->irq, irqfd->gsi, ret); | |
3550 | ||
3551 | return ret; | |
3552 | } | |
3553 | ||
3554 | static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer *cons, | |
3555 | struct irq_bypass_producer *prod) | |
3556 | { | |
3557 | int ret; | |
3558 | struct kvm_kernel_irqfd *irqfd = | |
3559 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
3560 | ||
3561 | irqfd->producer = NULL; | |
3562 | ||
3563 | /* | |
3564 | * When producer of consumer is unregistered, we change back to | |
3565 | * default external interrupt handling mode - KVM real mode | |
3566 | * will switch back to host. | |
3567 | */ | |
3568 | ret = kvmppc_clr_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); | |
3569 | if (ret) | |
3570 | pr_warn("kvmppc_clr_passthru_irq (irq %d, gsi %d) fails: %d\n", | |
3571 | prod->irq, irqfd->gsi, ret); | |
3572 | } | |
8daaafc8 SW |
3573 | #endif |
3574 | ||
3a167bea AK |
3575 | static long kvm_arch_vm_ioctl_hv(struct file *filp, |
3576 | unsigned int ioctl, unsigned long arg) | |
3577 | { | |
3578 | struct kvm *kvm __maybe_unused = filp->private_data; | |
3579 | void __user *argp = (void __user *)arg; | |
3580 | long r; | |
3581 | ||
3582 | switch (ioctl) { | |
3583 | ||
3a167bea AK |
3584 | case KVM_PPC_ALLOCATE_HTAB: { |
3585 | u32 htab_order; | |
3586 | ||
3587 | r = -EFAULT; | |
3588 | if (get_user(htab_order, (u32 __user *)argp)) | |
3589 | break; | |
3590 | r = kvmppc_alloc_reset_hpt(kvm, &htab_order); | |
3591 | if (r) | |
3592 | break; | |
3593 | r = -EFAULT; | |
3594 | if (put_user(htab_order, (u32 __user *)argp)) | |
3595 | break; | |
3596 | r = 0; | |
3597 | break; | |
3598 | } | |
3599 | ||
3600 | case KVM_PPC_GET_HTAB_FD: { | |
3601 | struct kvm_get_htab_fd ghf; | |
3602 | ||
3603 | r = -EFAULT; | |
3604 | if (copy_from_user(&ghf, argp, sizeof(ghf))) | |
3605 | break; | |
3606 | r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); | |
3607 | break; | |
3608 | } | |
3609 | ||
3610 | default: | |
3611 | r = -ENOTTY; | |
3612 | } | |
3613 | ||
3614 | return r; | |
3615 | } | |
3616 | ||
699a0ea0 PM |
3617 | /* |
3618 | * List of hcall numbers to enable by default. | |
3619 | * For compatibility with old userspace, we enable by default | |
3620 | * all hcalls that were implemented before the hcall-enabling | |
3621 | * facility was added. Note this list should not include H_RTAS. | |
3622 | */ | |
3623 | static unsigned int default_hcall_list[] = { | |
3624 | H_REMOVE, | |
3625 | H_ENTER, | |
3626 | H_READ, | |
3627 | H_PROTECT, | |
3628 | H_BULK_REMOVE, | |
3629 | H_GET_TCE, | |
3630 | H_PUT_TCE, | |
3631 | H_SET_DABR, | |
3632 | H_SET_XDABR, | |
3633 | H_CEDE, | |
3634 | H_PROD, | |
3635 | H_CONFER, | |
3636 | H_REGISTER_VPA, | |
3637 | #ifdef CONFIG_KVM_XICS | |
3638 | H_EOI, | |
3639 | H_CPPR, | |
3640 | H_IPI, | |
3641 | H_IPOLL, | |
3642 | H_XIRR, | |
3643 | H_XIRR_X, | |
3644 | #endif | |
3645 | 0 | |
3646 | }; | |
3647 | ||
3648 | static void init_default_hcalls(void) | |
3649 | { | |
3650 | int i; | |
ae2113a4 | 3651 | unsigned int hcall; |
699a0ea0 | 3652 | |
ae2113a4 PM |
3653 | for (i = 0; default_hcall_list[i]; ++i) { |
3654 | hcall = default_hcall_list[i]; | |
3655 | WARN_ON(!kvmppc_hcall_impl_hv(hcall)); | |
3656 | __set_bit(hcall / 4, default_enabled_hcalls); | |
3657 | } | |
699a0ea0 PM |
3658 | } |
3659 | ||
cbbc58d4 | 3660 | static struct kvmppc_ops kvm_ops_hv = { |
3a167bea AK |
3661 | .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, |
3662 | .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, | |
3663 | .get_one_reg = kvmppc_get_one_reg_hv, | |
3664 | .set_one_reg = kvmppc_set_one_reg_hv, | |
3665 | .vcpu_load = kvmppc_core_vcpu_load_hv, | |
3666 | .vcpu_put = kvmppc_core_vcpu_put_hv, | |
3667 | .set_msr = kvmppc_set_msr_hv, | |
3668 | .vcpu_run = kvmppc_vcpu_run_hv, | |
3669 | .vcpu_create = kvmppc_core_vcpu_create_hv, | |
3670 | .vcpu_free = kvmppc_core_vcpu_free_hv, | |
3671 | .check_requests = kvmppc_core_check_requests_hv, | |
3672 | .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv, | |
3673 | .flush_memslot = kvmppc_core_flush_memslot_hv, | |
3674 | .prepare_memory_region = kvmppc_core_prepare_memory_region_hv, | |
3675 | .commit_memory_region = kvmppc_core_commit_memory_region_hv, | |
3676 | .unmap_hva = kvm_unmap_hva_hv, | |
3677 | .unmap_hva_range = kvm_unmap_hva_range_hv, | |
3678 | .age_hva = kvm_age_hva_hv, | |
3679 | .test_age_hva = kvm_test_age_hva_hv, | |
3680 | .set_spte_hva = kvm_set_spte_hva_hv, | |
3681 | .mmu_destroy = kvmppc_mmu_destroy_hv, | |
3682 | .free_memslot = kvmppc_core_free_memslot_hv, | |
3683 | .create_memslot = kvmppc_core_create_memslot_hv, | |
3684 | .init_vm = kvmppc_core_init_vm_hv, | |
3685 | .destroy_vm = kvmppc_core_destroy_vm_hv, | |
3a167bea AK |
3686 | .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv, |
3687 | .emulate_op = kvmppc_core_emulate_op_hv, | |
3688 | .emulate_mtspr = kvmppc_core_emulate_mtspr_hv, | |
3689 | .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, | |
3690 | .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, | |
3691 | .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, | |
ae2113a4 | 3692 | .hcall_implemented = kvmppc_hcall_impl_hv, |
c57875f5 SW |
3693 | #ifdef CONFIG_KVM_XICS |
3694 | .irq_bypass_add_producer = kvmppc_irq_bypass_add_producer_hv, | |
3695 | .irq_bypass_del_producer = kvmppc_irq_bypass_del_producer_hv, | |
3696 | #endif | |
3a167bea AK |
3697 | }; |
3698 | ||
fd7bacbc MS |
3699 | static int kvm_init_subcore_bitmap(void) |
3700 | { | |
3701 | int i, j; | |
3702 | int nr_cores = cpu_nr_cores(); | |
3703 | struct sibling_subcore_state *sibling_subcore_state; | |
3704 | ||
3705 | for (i = 0; i < nr_cores; i++) { | |
3706 | int first_cpu = i * threads_per_core; | |
3707 | int node = cpu_to_node(first_cpu); | |
3708 | ||
3709 | /* Ignore if it is already allocated. */ | |
3710 | if (paca[first_cpu].sibling_subcore_state) | |
3711 | continue; | |
3712 | ||
3713 | sibling_subcore_state = | |
3714 | kmalloc_node(sizeof(struct sibling_subcore_state), | |
3715 | GFP_KERNEL, node); | |
3716 | if (!sibling_subcore_state) | |
3717 | return -ENOMEM; | |
3718 | ||
3719 | memset(sibling_subcore_state, 0, | |
3720 | sizeof(struct sibling_subcore_state)); | |
3721 | ||
3722 | for (j = 0; j < threads_per_core; j++) { | |
3723 | int cpu = first_cpu + j; | |
3724 | ||
3725 | paca[cpu].sibling_subcore_state = sibling_subcore_state; | |
3726 | } | |
3727 | } | |
3728 | return 0; | |
3729 | } | |
3730 | ||
3a167bea | 3731 | static int kvmppc_book3s_init_hv(void) |
de56a948 PM |
3732 | { |
3733 | int r; | |
cbbc58d4 AK |
3734 | /* |
3735 | * FIXME!! Do we need to check on all cpus ? | |
3736 | */ | |
3737 | r = kvmppc_core_check_processor_compat_hv(); | |
3738 | if (r < 0) | |
739e2425 | 3739 | return -ENODEV; |
de56a948 | 3740 | |
fd7bacbc MS |
3741 | r = kvm_init_subcore_bitmap(); |
3742 | if (r) | |
3743 | return r; | |
3744 | ||
f725758b PM |
3745 | /* |
3746 | * We need a way of accessing the XICS interrupt controller, | |
3747 | * either directly, via paca[cpu].kvm_hstate.xics_phys, or | |
3748 | * indirectly, via OPAL. | |
3749 | */ | |
3750 | #ifdef CONFIG_SMP | |
3751 | if (!get_paca()->kvm_hstate.xics_phys) { | |
3752 | struct device_node *np; | |
3753 | ||
3754 | np = of_find_compatible_node(NULL, NULL, "ibm,opal-intc"); | |
3755 | if (!np) { | |
3756 | pr_err("KVM-HV: Cannot determine method for accessing XICS\n"); | |
3757 | return -ENODEV; | |
3758 | } | |
3759 | } | |
3760 | #endif | |
3761 | ||
cbbc58d4 AK |
3762 | kvm_ops_hv.owner = THIS_MODULE; |
3763 | kvmppc_hv_ops = &kvm_ops_hv; | |
de56a948 | 3764 | |
699a0ea0 PM |
3765 | init_default_hcalls(); |
3766 | ||
ec257165 PM |
3767 | init_vcore_lists(); |
3768 | ||
cbbc58d4 | 3769 | r = kvmppc_mmu_hv_init(); |
de56a948 PM |
3770 | return r; |
3771 | } | |
3772 | ||
3a167bea | 3773 | static void kvmppc_book3s_exit_hv(void) |
de56a948 | 3774 | { |
79b6c247 | 3775 | kvmppc_free_host_rm_ops(); |
cbbc58d4 | 3776 | kvmppc_hv_ops = NULL; |
de56a948 PM |
3777 | } |
3778 | ||
3a167bea AK |
3779 | module_init(kvmppc_book3s_init_hv); |
3780 | module_exit(kvmppc_book3s_exit_hv); | |
2ba9f0d8 | 3781 | MODULE_LICENSE("GPL"); |
398a76c6 AG |
3782 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
3783 | MODULE_ALIAS("devname:kvm"); | |
7c5b06ca | 3784 |