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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> | |
174cd4b1 | 25 | #include <linux/sched/signal.h> |
03441a34 | 26 | #include <linux/sched/stat.h> |
de56a948 | 27 | #include <linux/delay.h> |
66b15db6 | 28 | #include <linux/export.h> |
de56a948 PM |
29 | #include <linux/fs.h> |
30 | #include <linux/anon_inodes.h> | |
07f8ab25 | 31 | #include <linux/cpu.h> |
de56a948 | 32 | #include <linux/cpumask.h> |
aa04b4cc PM |
33 | #include <linux/spinlock.h> |
34 | #include <linux/page-flags.h> | |
2c9097e4 | 35 | #include <linux/srcu.h> |
398a76c6 | 36 | #include <linux/miscdevice.h> |
e23a808b | 37 | #include <linux/debugfs.h> |
de56a948 PM |
38 | |
39 | #include <asm/reg.h> | |
40 | #include <asm/cputable.h> | |
41 | #include <asm/cacheflush.h> | |
42 | #include <asm/tlbflush.h> | |
7c0f6ba6 | 43 | #include <linux/uaccess.h> |
de56a948 PM |
44 | #include <asm/io.h> |
45 | #include <asm/kvm_ppc.h> | |
46 | #include <asm/kvm_book3s.h> | |
47 | #include <asm/mmu_context.h> | |
48 | #include <asm/lppaca.h> | |
49 | #include <asm/processor.h> | |
371fefd6 | 50 | #include <asm/cputhreads.h> |
aa04b4cc | 51 | #include <asm/page.h> |
de1d9248 | 52 | #include <asm/hvcall.h> |
ae3a197e | 53 | #include <asm/switch_to.h> |
512691d4 | 54 | #include <asm/smp.h> |
66feed61 | 55 | #include <asm/dbell.h> |
fd7bacbc | 56 | #include <asm/hmi.h> |
c57875f5 | 57 | #include <asm/pnv-pci.h> |
7a84084c | 58 | #include <asm/mmu.h> |
f725758b PM |
59 | #include <asm/opal.h> |
60 | #include <asm/xics.h> | |
de56a948 | 61 | #include <linux/gfp.h> |
de56a948 PM |
62 | #include <linux/vmalloc.h> |
63 | #include <linux/highmem.h> | |
c77162de | 64 | #include <linux/hugetlb.h> |
c57875f5 SW |
65 | #include <linux/kvm_irqfd.h> |
66 | #include <linux/irqbypass.h> | |
2ba9f0d8 | 67 | #include <linux/module.h> |
7b5f8272 | 68 | #include <linux/compiler.h> |
f725758b | 69 | #include <linux/of.h> |
de56a948 | 70 | |
3a167bea AK |
71 | #include "book3s.h" |
72 | ||
3c78f78a SW |
73 | #define CREATE_TRACE_POINTS |
74 | #include "trace_hv.h" | |
75 | ||
de56a948 PM |
76 | /* #define EXIT_DEBUG */ |
77 | /* #define EXIT_DEBUG_SIMPLE */ | |
78 | /* #define EXIT_DEBUG_INT */ | |
79 | ||
913d3ff9 PM |
80 | /* Used to indicate that a guest page fault needs to be handled */ |
81 | #define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1) | |
f7af5209 SW |
82 | /* Used to indicate that a guest passthrough interrupt needs to be handled */ |
83 | #define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2) | |
913d3ff9 | 84 | |
c7b67670 PM |
85 | /* Used as a "null" value for timebase values */ |
86 | #define TB_NIL (~(u64)0) | |
87 | ||
699a0ea0 PM |
88 | static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1); |
89 | ||
b4deba5c PM |
90 | static int dynamic_mt_modes = 6; |
91 | module_param(dynamic_mt_modes, int, S_IRUGO | S_IWUSR); | |
92 | MODULE_PARM_DESC(dynamic_mt_modes, "Set of allowed dynamic micro-threading modes: 0 (= none), 2, 4, or 6 (= 2 or 4)"); | |
ec257165 PM |
93 | static int target_smt_mode; |
94 | module_param(target_smt_mode, int, S_IRUGO | S_IWUSR); | |
95 | MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)"); | |
9678cdaa | 96 | |
520fe9c6 SW |
97 | #ifdef CONFIG_KVM_XICS |
98 | static struct kernel_param_ops module_param_ops = { | |
99 | .set = param_set_int, | |
100 | .get = param_get_int, | |
101 | }; | |
102 | ||
644abbb2 SW |
103 | module_param_cb(kvm_irq_bypass, &module_param_ops, &kvm_irq_bypass, |
104 | S_IRUGO | S_IWUSR); | |
105 | MODULE_PARM_DESC(kvm_irq_bypass, "Bypass passthrough interrupt optimization"); | |
106 | ||
520fe9c6 SW |
107 | module_param_cb(h_ipi_redirect, &module_param_ops, &h_ipi_redirect, |
108 | S_IRUGO | S_IWUSR); | |
109 | MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core"); | |
110 | #endif | |
111 | ||
19ccb76a | 112 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu); |
32fad281 | 113 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); |
19ccb76a | 114 | |
7b5f8272 SJS |
115 | static inline struct kvm_vcpu *next_runnable_thread(struct kvmppc_vcore *vc, |
116 | int *ip) | |
117 | { | |
118 | int i = *ip; | |
119 | struct kvm_vcpu *vcpu; | |
120 | ||
121 | while (++i < MAX_SMT_THREADS) { | |
122 | vcpu = READ_ONCE(vc->runnable_threads[i]); | |
123 | if (vcpu) { | |
124 | *ip = i; | |
125 | return vcpu; | |
126 | } | |
127 | } | |
128 | return NULL; | |
129 | } | |
130 | ||
131 | /* Used to traverse the list of runnable threads for a given vcore */ | |
132 | #define for_each_runnable_thread(i, vcpu, vc) \ | |
133 | for (i = -1; (vcpu = next_runnable_thread(vc, &i)); ) | |
134 | ||
66feed61 PM |
135 | static bool kvmppc_ipi_thread(int cpu) |
136 | { | |
1704a81c PM |
137 | unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER); |
138 | ||
139 | /* On POWER9 we can use msgsnd to IPI any cpu */ | |
140 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { | |
141 | msg |= get_hard_smp_processor_id(cpu); | |
142 | smp_mb(); | |
143 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
144 | return true; | |
145 | } | |
146 | ||
66feed61 PM |
147 | /* On POWER8 for IPIs to threads in the same core, use msgsnd */ |
148 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) { | |
149 | preempt_disable(); | |
150 | if (cpu_first_thread_sibling(cpu) == | |
151 | cpu_first_thread_sibling(smp_processor_id())) { | |
66feed61 PM |
152 | msg |= cpu_thread_in_core(cpu); |
153 | smp_mb(); | |
154 | __asm__ __volatile__ (PPC_MSGSND(%0) : : "r" (msg)); | |
155 | preempt_enable(); | |
156 | return true; | |
157 | } | |
158 | preempt_enable(); | |
159 | } | |
160 | ||
161 | #if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP) | |
f725758b PM |
162 | if (cpu >= 0 && cpu < nr_cpu_ids) { |
163 | if (paca[cpu].kvm_hstate.xics_phys) { | |
164 | xics_wake_cpu(cpu); | |
165 | return true; | |
166 | } | |
167 | opal_int_set_mfrr(get_hard_smp_processor_id(cpu), IPI_PRIORITY); | |
66feed61 PM |
168 | return true; |
169 | } | |
170 | #endif | |
171 | ||
172 | return false; | |
173 | } | |
174 | ||
3a167bea | 175 | static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu) |
54695c30 | 176 | { |
ec257165 | 177 | int cpu; |
8577370f | 178 | struct swait_queue_head *wqp; |
54695c30 BH |
179 | |
180 | wqp = kvm_arch_vcpu_wq(vcpu); | |
8577370f MT |
181 | if (swait_active(wqp)) { |
182 | swake_up(wqp); | |
54695c30 BH |
183 | ++vcpu->stat.halt_wakeup; |
184 | } | |
185 | ||
3deda5e5 PM |
186 | cpu = READ_ONCE(vcpu->arch.thread_cpu); |
187 | if (cpu >= 0 && kvmppc_ipi_thread(cpu)) | |
66feed61 | 188 | return; |
54695c30 BH |
189 | |
190 | /* CPU points to the first thread of the core */ | |
ec257165 | 191 | cpu = vcpu->cpu; |
66feed61 PM |
192 | if (cpu >= 0 && cpu < nr_cpu_ids && cpu_online(cpu)) |
193 | smp_send_reschedule(cpu); | |
54695c30 BH |
194 | } |
195 | ||
c7b67670 PM |
196 | /* |
197 | * We use the vcpu_load/put functions to measure stolen time. | |
198 | * Stolen time is counted as time when either the vcpu is able to | |
199 | * run as part of a virtual core, but the task running the vcore | |
200 | * is preempted or sleeping, or when the vcpu needs something done | |
201 | * in the kernel by the task running the vcpu, but that task is | |
202 | * preempted or sleeping. Those two things have to be counted | |
203 | * separately, since one of the vcpu tasks will take on the job | |
204 | * of running the core, and the other vcpu tasks in the vcore will | |
205 | * sleep waiting for it to do that, but that sleep shouldn't count | |
206 | * as stolen time. | |
207 | * | |
208 | * Hence we accumulate stolen time when the vcpu can run as part of | |
209 | * a vcore using vc->stolen_tb, and the stolen time when the vcpu | |
210 | * needs its task to do other things in the kernel (for example, | |
211 | * service a page fault) in busy_stolen. We don't accumulate | |
212 | * stolen time for a vcore when it is inactive, or for a vcpu | |
213 | * when it is in state RUNNING or NOTREADY. NOTREADY is a bit of | |
214 | * a misnomer; it means that the vcpu task is not executing in | |
215 | * the KVM_VCPU_RUN ioctl, i.e. it is in userspace or elsewhere in | |
216 | * the kernel. We don't have any way of dividing up that time | |
217 | * between time that the vcpu is genuinely stopped, time that | |
218 | * the task is actively working on behalf of the vcpu, and time | |
219 | * that the task is preempted, so we don't count any of it as | |
220 | * stolen. | |
221 | * | |
222 | * Updates to busy_stolen are protected by arch.tbacct_lock; | |
2711e248 PM |
223 | * updates to vc->stolen_tb are protected by the vcore->stoltb_lock |
224 | * lock. The stolen times are measured in units of timebase ticks. | |
225 | * (Note that the != TB_NIL checks below are purely defensive; | |
226 | * they should never fail.) | |
c7b67670 PM |
227 | */ |
228 | ||
ec257165 PM |
229 | static void kvmppc_core_start_stolen(struct kvmppc_vcore *vc) |
230 | { | |
231 | unsigned long flags; | |
232 | ||
233 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
234 | vc->preempt_tb = mftb(); | |
235 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
236 | } | |
237 | ||
238 | static void kvmppc_core_end_stolen(struct kvmppc_vcore *vc) | |
239 | { | |
240 | unsigned long flags; | |
241 | ||
242 | spin_lock_irqsave(&vc->stoltb_lock, flags); | |
243 | if (vc->preempt_tb != TB_NIL) { | |
244 | vc->stolen_tb += mftb() - vc->preempt_tb; | |
245 | vc->preempt_tb = TB_NIL; | |
246 | } | |
247 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
248 | } | |
249 | ||
3a167bea | 250 | static void kvmppc_core_vcpu_load_hv(struct kvm_vcpu *vcpu, int cpu) |
de56a948 | 251 | { |
0456ec4f | 252 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 253 | unsigned long flags; |
0456ec4f | 254 | |
2711e248 PM |
255 | /* |
256 | * We can test vc->runner without taking the vcore lock, | |
257 | * because only this task ever sets vc->runner to this | |
258 | * vcpu, and once it is set to this vcpu, only this task | |
259 | * ever sets it to NULL. | |
260 | */ | |
ec257165 PM |
261 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
262 | kvmppc_core_end_stolen(vc); | |
263 | ||
2711e248 | 264 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
c7b67670 PM |
265 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST && |
266 | vcpu->arch.busy_preempt != TB_NIL) { | |
267 | vcpu->arch.busy_stolen += mftb() - vcpu->arch.busy_preempt; | |
268 | vcpu->arch.busy_preempt = TB_NIL; | |
269 | } | |
bf3d32e1 | 270 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
271 | } |
272 | ||
3a167bea | 273 | static void kvmppc_core_vcpu_put_hv(struct kvm_vcpu *vcpu) |
de56a948 | 274 | { |
0456ec4f | 275 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
bf3d32e1 | 276 | unsigned long flags; |
0456ec4f | 277 | |
ec257165 PM |
278 | if (vc->runner == vcpu && vc->vcore_state >= VCORE_SLEEPING) |
279 | kvmppc_core_start_stolen(vc); | |
280 | ||
2711e248 | 281 | spin_lock_irqsave(&vcpu->arch.tbacct_lock, flags); |
c7b67670 PM |
282 | if (vcpu->arch.state == KVMPPC_VCPU_BUSY_IN_HOST) |
283 | vcpu->arch.busy_preempt = mftb(); | |
bf3d32e1 | 284 | spin_unlock_irqrestore(&vcpu->arch.tbacct_lock, flags); |
de56a948 PM |
285 | } |
286 | ||
3a167bea | 287 | static void kvmppc_set_msr_hv(struct kvm_vcpu *vcpu, u64 msr) |
de56a948 | 288 | { |
c20875a3 PM |
289 | /* |
290 | * Check for illegal transactional state bit combination | |
291 | * and if we find it, force the TS field to a safe state. | |
292 | */ | |
293 | if ((msr & MSR_TS_MASK) == MSR_TS_MASK) | |
294 | msr &= ~MSR_TS_MASK; | |
de56a948 | 295 | vcpu->arch.shregs.msr = msr; |
19ccb76a | 296 | kvmppc_end_cede(vcpu); |
de56a948 PM |
297 | } |
298 | ||
5358a963 | 299 | static void kvmppc_set_pvr_hv(struct kvm_vcpu *vcpu, u32 pvr) |
de56a948 PM |
300 | { |
301 | vcpu->arch.pvr = pvr; | |
302 | } | |
303 | ||
2ee13be3 SJS |
304 | /* Dummy value used in computing PCR value below */ |
305 | #define PCR_ARCH_300 (PCR_ARCH_207 << 1) | |
306 | ||
5358a963 | 307 | static int kvmppc_set_arch_compat(struct kvm_vcpu *vcpu, u32 arch_compat) |
388cc6e1 | 308 | { |
2ee13be3 | 309 | unsigned long host_pcr_bit = 0, guest_pcr_bit = 0; |
388cc6e1 PM |
310 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
311 | ||
2ee13be3 SJS |
312 | /* We can (emulate) our own architecture version and anything older */ |
313 | if (cpu_has_feature(CPU_FTR_ARCH_300)) | |
314 | host_pcr_bit = PCR_ARCH_300; | |
315 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
316 | host_pcr_bit = PCR_ARCH_207; | |
317 | else if (cpu_has_feature(CPU_FTR_ARCH_206)) | |
318 | host_pcr_bit = PCR_ARCH_206; | |
319 | else | |
320 | host_pcr_bit = PCR_ARCH_205; | |
321 | ||
322 | /* Determine lowest PCR bit needed to run guest in given PVR level */ | |
323 | guest_pcr_bit = host_pcr_bit; | |
388cc6e1 | 324 | if (arch_compat) { |
388cc6e1 PM |
325 | switch (arch_compat) { |
326 | case PVR_ARCH_205: | |
2ee13be3 | 327 | guest_pcr_bit = PCR_ARCH_205; |
388cc6e1 PM |
328 | break; |
329 | case PVR_ARCH_206: | |
330 | case PVR_ARCH_206p: | |
2ee13be3 | 331 | guest_pcr_bit = PCR_ARCH_206; |
5557ae0e PM |
332 | break; |
333 | case PVR_ARCH_207: | |
2ee13be3 SJS |
334 | guest_pcr_bit = PCR_ARCH_207; |
335 | break; | |
336 | case PVR_ARCH_300: | |
337 | guest_pcr_bit = PCR_ARCH_300; | |
388cc6e1 PM |
338 | break; |
339 | default: | |
340 | return -EINVAL; | |
341 | } | |
342 | } | |
343 | ||
2ee13be3 SJS |
344 | /* Check requested PCR bits don't exceed our capabilities */ |
345 | if (guest_pcr_bit > host_pcr_bit) | |
346 | return -EINVAL; | |
347 | ||
388cc6e1 PM |
348 | spin_lock(&vc->lock); |
349 | vc->arch_compat = arch_compat; | |
2ee13be3 SJS |
350 | /* Set all PCR bits for which guest_pcr_bit <= bit < host_pcr_bit */ |
351 | vc->pcr = host_pcr_bit - guest_pcr_bit; | |
388cc6e1 PM |
352 | spin_unlock(&vc->lock); |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
5358a963 | 357 | static void kvmppc_dump_regs(struct kvm_vcpu *vcpu) |
de56a948 PM |
358 | { |
359 | int r; | |
360 | ||
361 | pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id); | |
362 | pr_err("pc = %.16lx msr = %.16llx trap = %x\n", | |
363 | vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap); | |
364 | for (r = 0; r < 16; ++r) | |
365 | pr_err("r%2d = %.16lx r%d = %.16lx\n", | |
366 | r, kvmppc_get_gpr(vcpu, r), | |
367 | r+16, kvmppc_get_gpr(vcpu, r+16)); | |
368 | pr_err("ctr = %.16lx lr = %.16lx\n", | |
369 | vcpu->arch.ctr, vcpu->arch.lr); | |
370 | pr_err("srr0 = %.16llx srr1 = %.16llx\n", | |
371 | vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1); | |
372 | pr_err("sprg0 = %.16llx sprg1 = %.16llx\n", | |
373 | vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1); | |
374 | pr_err("sprg2 = %.16llx sprg3 = %.16llx\n", | |
375 | vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3); | |
376 | pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n", | |
377 | vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr); | |
378 | pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar); | |
379 | pr_err("fault dar = %.16lx dsisr = %.8x\n", | |
380 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
381 | pr_err("SLB (%d entries):\n", vcpu->arch.slb_max); | |
382 | for (r = 0; r < vcpu->arch.slb_max; ++r) | |
383 | pr_err(" ESID = %.16llx VSID = %.16llx\n", | |
384 | vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); | |
385 | pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", | |
a0144e2a | 386 | vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, |
de56a948 PM |
387 | vcpu->arch.last_inst); |
388 | } | |
389 | ||
5358a963 | 390 | static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id) |
a8606e20 | 391 | { |
e09fefde | 392 | struct kvm_vcpu *ret; |
a8606e20 PM |
393 | |
394 | mutex_lock(&kvm->lock); | |
e09fefde | 395 | ret = kvm_get_vcpu_by_id(kvm, id); |
a8606e20 PM |
396 | mutex_unlock(&kvm->lock); |
397 | return ret; | |
398 | } | |
399 | ||
400 | static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa) | |
401 | { | |
f13c13a0 | 402 | vpa->__old_status |= LPPACA_OLD_SHARED_PROC; |
02407552 | 403 | vpa->yield_count = cpu_to_be32(1); |
a8606e20 PM |
404 | } |
405 | ||
55b665b0 PM |
406 | static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v, |
407 | unsigned long addr, unsigned long len) | |
408 | { | |
409 | /* check address is cacheline aligned */ | |
410 | if (addr & (L1_CACHE_BYTES - 1)) | |
411 | return -EINVAL; | |
412 | spin_lock(&vcpu->arch.vpa_update_lock); | |
413 | if (v->next_gpa != addr || v->len != len) { | |
414 | v->next_gpa = addr; | |
415 | v->len = addr ? len : 0; | |
416 | v->update_pending = 1; | |
417 | } | |
418 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
419 | return 0; | |
420 | } | |
421 | ||
2e25aa5f PM |
422 | /* Length for a per-processor buffer is passed in at offset 4 in the buffer */ |
423 | struct reg_vpa { | |
424 | u32 dummy; | |
425 | union { | |
02407552 AG |
426 | __be16 hword; |
427 | __be32 word; | |
2e25aa5f PM |
428 | } length; |
429 | }; | |
430 | ||
431 | static int vpa_is_registered(struct kvmppc_vpa *vpap) | |
432 | { | |
433 | if (vpap->update_pending) | |
434 | return vpap->next_gpa != 0; | |
435 | return vpap->pinned_addr != NULL; | |
436 | } | |
437 | ||
a8606e20 PM |
438 | static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, |
439 | unsigned long flags, | |
440 | unsigned long vcpuid, unsigned long vpa) | |
441 | { | |
442 | struct kvm *kvm = vcpu->kvm; | |
93e60249 | 443 | unsigned long len, nb; |
a8606e20 PM |
444 | void *va; |
445 | struct kvm_vcpu *tvcpu; | |
2e25aa5f PM |
446 | int err; |
447 | int subfunc; | |
448 | struct kvmppc_vpa *vpap; | |
a8606e20 PM |
449 | |
450 | tvcpu = kvmppc_find_vcpu(kvm, vcpuid); | |
451 | if (!tvcpu) | |
452 | return H_PARAMETER; | |
453 | ||
2e25aa5f PM |
454 | subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK; |
455 | if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL || | |
456 | subfunc == H_VPA_REG_SLB) { | |
457 | /* Registering new area - address must be cache-line aligned */ | |
458 | if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa) | |
a8606e20 | 459 | return H_PARAMETER; |
2e25aa5f PM |
460 | |
461 | /* convert logical addr to kernel addr and read length */ | |
93e60249 PM |
462 | va = kvmppc_pin_guest_page(kvm, vpa, &nb); |
463 | if (va == NULL) | |
b2b2f165 | 464 | return H_PARAMETER; |
2e25aa5f | 465 | if (subfunc == H_VPA_REG_VPA) |
02407552 | 466 | len = be16_to_cpu(((struct reg_vpa *)va)->length.hword); |
a8606e20 | 467 | else |
02407552 | 468 | len = be32_to_cpu(((struct reg_vpa *)va)->length.word); |
c35635ef | 469 | kvmppc_unpin_guest_page(kvm, va, vpa, false); |
2e25aa5f PM |
470 | |
471 | /* Check length */ | |
472 | if (len > nb || len < sizeof(struct reg_vpa)) | |
473 | return H_PARAMETER; | |
474 | } else { | |
475 | vpa = 0; | |
476 | len = 0; | |
477 | } | |
478 | ||
479 | err = H_PARAMETER; | |
480 | vpap = NULL; | |
481 | spin_lock(&tvcpu->arch.vpa_update_lock); | |
482 | ||
483 | switch (subfunc) { | |
484 | case H_VPA_REG_VPA: /* register VPA */ | |
485 | if (len < sizeof(struct lppaca)) | |
a8606e20 | 486 | break; |
2e25aa5f PM |
487 | vpap = &tvcpu->arch.vpa; |
488 | err = 0; | |
489 | break; | |
490 | ||
491 | case H_VPA_REG_DTL: /* register DTL */ | |
492 | if (len < sizeof(struct dtl_entry)) | |
a8606e20 | 493 | break; |
2e25aa5f PM |
494 | len -= len % sizeof(struct dtl_entry); |
495 | ||
496 | /* Check that they have previously registered a VPA */ | |
497 | err = H_RESOURCE; | |
498 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 499 | break; |
2e25aa5f PM |
500 | |
501 | vpap = &tvcpu->arch.dtl; | |
502 | err = 0; | |
503 | break; | |
504 | ||
505 | case H_VPA_REG_SLB: /* register SLB shadow buffer */ | |
506 | /* Check that they have previously registered a VPA */ | |
507 | err = H_RESOURCE; | |
508 | if (!vpa_is_registered(&tvcpu->arch.vpa)) | |
a8606e20 | 509 | break; |
2e25aa5f PM |
510 | |
511 | vpap = &tvcpu->arch.slb_shadow; | |
512 | err = 0; | |
513 | break; | |
514 | ||
515 | case H_VPA_DEREG_VPA: /* deregister VPA */ | |
516 | /* Check they don't still have a DTL or SLB buf registered */ | |
517 | err = H_RESOURCE; | |
518 | if (vpa_is_registered(&tvcpu->arch.dtl) || | |
519 | vpa_is_registered(&tvcpu->arch.slb_shadow)) | |
a8606e20 | 520 | break; |
2e25aa5f PM |
521 | |
522 | vpap = &tvcpu->arch.vpa; | |
523 | err = 0; | |
524 | break; | |
525 | ||
526 | case H_VPA_DEREG_DTL: /* deregister DTL */ | |
527 | vpap = &tvcpu->arch.dtl; | |
528 | err = 0; | |
529 | break; | |
530 | ||
531 | case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */ | |
532 | vpap = &tvcpu->arch.slb_shadow; | |
533 | err = 0; | |
534 | break; | |
535 | } | |
536 | ||
537 | if (vpap) { | |
538 | vpap->next_gpa = vpa; | |
539 | vpap->len = len; | |
540 | vpap->update_pending = 1; | |
a8606e20 | 541 | } |
93e60249 | 542 | |
2e25aa5f PM |
543 | spin_unlock(&tvcpu->arch.vpa_update_lock); |
544 | ||
93e60249 | 545 | return err; |
a8606e20 PM |
546 | } |
547 | ||
081f323b | 548 | static void kvmppc_update_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *vpap) |
2e25aa5f | 549 | { |
081f323b | 550 | struct kvm *kvm = vcpu->kvm; |
2e25aa5f PM |
551 | void *va; |
552 | unsigned long nb; | |
081f323b | 553 | unsigned long gpa; |
2e25aa5f | 554 | |
081f323b PM |
555 | /* |
556 | * We need to pin the page pointed to by vpap->next_gpa, | |
557 | * but we can't call kvmppc_pin_guest_page under the lock | |
558 | * as it does get_user_pages() and down_read(). So we | |
559 | * have to drop the lock, pin the page, then get the lock | |
560 | * again and check that a new area didn't get registered | |
561 | * in the meantime. | |
562 | */ | |
563 | for (;;) { | |
564 | gpa = vpap->next_gpa; | |
565 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
566 | va = NULL; | |
567 | nb = 0; | |
568 | if (gpa) | |
c35635ef | 569 | va = kvmppc_pin_guest_page(kvm, gpa, &nb); |
081f323b PM |
570 | spin_lock(&vcpu->arch.vpa_update_lock); |
571 | if (gpa == vpap->next_gpa) | |
572 | break; | |
573 | /* sigh... unpin that one and try again */ | |
574 | if (va) | |
c35635ef | 575 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b PM |
576 | } |
577 | ||
578 | vpap->update_pending = 0; | |
579 | if (va && nb < vpap->len) { | |
580 | /* | |
581 | * If it's now too short, it must be that userspace | |
582 | * has changed the mappings underlying guest memory, | |
583 | * so unregister the region. | |
584 | */ | |
c35635ef | 585 | kvmppc_unpin_guest_page(kvm, va, gpa, false); |
081f323b | 586 | va = NULL; |
2e25aa5f PM |
587 | } |
588 | if (vpap->pinned_addr) | |
c35635ef PM |
589 | kvmppc_unpin_guest_page(kvm, vpap->pinned_addr, vpap->gpa, |
590 | vpap->dirty); | |
591 | vpap->gpa = gpa; | |
2e25aa5f | 592 | vpap->pinned_addr = va; |
c35635ef | 593 | vpap->dirty = false; |
2e25aa5f PM |
594 | if (va) |
595 | vpap->pinned_end = va + vpap->len; | |
596 | } | |
597 | ||
598 | static void kvmppc_update_vpas(struct kvm_vcpu *vcpu) | |
599 | { | |
2f12f034 PM |
600 | if (!(vcpu->arch.vpa.update_pending || |
601 | vcpu->arch.slb_shadow.update_pending || | |
602 | vcpu->arch.dtl.update_pending)) | |
603 | return; | |
604 | ||
2e25aa5f PM |
605 | spin_lock(&vcpu->arch.vpa_update_lock); |
606 | if (vcpu->arch.vpa.update_pending) { | |
081f323b | 607 | kvmppc_update_vpa(vcpu, &vcpu->arch.vpa); |
55b665b0 PM |
608 | if (vcpu->arch.vpa.pinned_addr) |
609 | init_vpa(vcpu, vcpu->arch.vpa.pinned_addr); | |
2e25aa5f PM |
610 | } |
611 | if (vcpu->arch.dtl.update_pending) { | |
081f323b | 612 | kvmppc_update_vpa(vcpu, &vcpu->arch.dtl); |
2e25aa5f PM |
613 | vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr; |
614 | vcpu->arch.dtl_index = 0; | |
615 | } | |
616 | if (vcpu->arch.slb_shadow.update_pending) | |
081f323b | 617 | kvmppc_update_vpa(vcpu, &vcpu->arch.slb_shadow); |
2e25aa5f PM |
618 | spin_unlock(&vcpu->arch.vpa_update_lock); |
619 | } | |
620 | ||
c7b67670 PM |
621 | /* |
622 | * Return the accumulated stolen time for the vcore up until `now'. | |
623 | * The caller should hold the vcore lock. | |
624 | */ | |
625 | static u64 vcore_stolen_time(struct kvmppc_vcore *vc, u64 now) | |
626 | { | |
627 | u64 p; | |
2711e248 | 628 | unsigned long flags; |
c7b67670 | 629 | |
2711e248 PM |
630 | spin_lock_irqsave(&vc->stoltb_lock, flags); |
631 | p = vc->stolen_tb; | |
c7b67670 | 632 | if (vc->vcore_state != VCORE_INACTIVE && |
2711e248 PM |
633 | vc->preempt_tb != TB_NIL) |
634 | p += now - vc->preempt_tb; | |
635 | spin_unlock_irqrestore(&vc->stoltb_lock, flags); | |
c7b67670 PM |
636 | return p; |
637 | } | |
638 | ||
0456ec4f PM |
639 | static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu, |
640 | struct kvmppc_vcore *vc) | |
641 | { | |
642 | struct dtl_entry *dt; | |
643 | struct lppaca *vpa; | |
c7b67670 PM |
644 | unsigned long stolen; |
645 | unsigned long core_stolen; | |
646 | u64 now; | |
0456ec4f PM |
647 | |
648 | dt = vcpu->arch.dtl_ptr; | |
649 | vpa = vcpu->arch.vpa.pinned_addr; | |
c7b67670 PM |
650 | now = mftb(); |
651 | core_stolen = vcore_stolen_time(vc, now); | |
652 | stolen = core_stolen - vcpu->arch.stolen_logged; | |
653 | vcpu->arch.stolen_logged = core_stolen; | |
bf3d32e1 | 654 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
655 | stolen += vcpu->arch.busy_stolen; |
656 | vcpu->arch.busy_stolen = 0; | |
bf3d32e1 | 657 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
0456ec4f PM |
658 | if (!dt || !vpa) |
659 | return; | |
660 | memset(dt, 0, sizeof(struct dtl_entry)); | |
661 | dt->dispatch_reason = 7; | |
02407552 AG |
662 | dt->processor_id = cpu_to_be16(vc->pcpu + vcpu->arch.ptid); |
663 | dt->timebase = cpu_to_be64(now + vc->tb_offset); | |
664 | dt->enqueue_to_dispatch_time = cpu_to_be32(stolen); | |
665 | dt->srr0 = cpu_to_be64(kvmppc_get_pc(vcpu)); | |
666 | dt->srr1 = cpu_to_be64(vcpu->arch.shregs.msr); | |
0456ec4f PM |
667 | ++dt; |
668 | if (dt == vcpu->arch.dtl.pinned_end) | |
669 | dt = vcpu->arch.dtl.pinned_addr; | |
670 | vcpu->arch.dtl_ptr = dt; | |
671 | /* order writing *dt vs. writing vpa->dtl_idx */ | |
672 | smp_wmb(); | |
02407552 | 673 | vpa->dtl_idx = cpu_to_be64(++vcpu->arch.dtl_index); |
c35635ef | 674 | vcpu->arch.dtl.dirty = true; |
0456ec4f PM |
675 | } |
676 | ||
9642382e MN |
677 | static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu) |
678 | { | |
679 | if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207) | |
680 | return true; | |
681 | if ((!vcpu->arch.vcore->arch_compat) && | |
682 | cpu_has_feature(CPU_FTR_ARCH_207S)) | |
683 | return true; | |
684 | return false; | |
685 | } | |
686 | ||
687 | static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags, | |
688 | unsigned long resource, unsigned long value1, | |
689 | unsigned long value2) | |
690 | { | |
691 | switch (resource) { | |
692 | case H_SET_MODE_RESOURCE_SET_CIABR: | |
693 | if (!kvmppc_power8_compatible(vcpu)) | |
694 | return H_P2; | |
695 | if (value2) | |
696 | return H_P4; | |
697 | if (mflags) | |
698 | return H_UNSUPPORTED_FLAG_START; | |
699 | /* Guests can't breakpoint the hypervisor */ | |
700 | if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
701 | return H_P3; | |
702 | vcpu->arch.ciabr = value1; | |
703 | return H_SUCCESS; | |
704 | case H_SET_MODE_RESOURCE_SET_DAWR: | |
705 | if (!kvmppc_power8_compatible(vcpu)) | |
706 | return H_P2; | |
707 | if (mflags) | |
708 | return H_UNSUPPORTED_FLAG_START; | |
709 | if (value2 & DABRX_HYP) | |
710 | return H_P4; | |
711 | vcpu->arch.dawr = value1; | |
712 | vcpu->arch.dawrx = value2; | |
713 | return H_SUCCESS; | |
714 | default: | |
715 | return H_TOO_HARD; | |
716 | } | |
717 | } | |
718 | ||
90fd09f8 SB |
719 | static int kvm_arch_vcpu_yield_to(struct kvm_vcpu *target) |
720 | { | |
721 | struct kvmppc_vcore *vcore = target->arch.vcore; | |
722 | ||
723 | /* | |
724 | * We expect to have been called by the real mode handler | |
725 | * (kvmppc_rm_h_confer()) which would have directly returned | |
726 | * H_SUCCESS if the source vcore wasn't idle (e.g. if it may | |
727 | * have useful work to do and should not confer) so we don't | |
728 | * recheck that here. | |
729 | */ | |
730 | ||
731 | spin_lock(&vcore->lock); | |
732 | if (target->arch.state == KVMPPC_VCPU_RUNNABLE && | |
ec257165 PM |
733 | vcore->vcore_state != VCORE_INACTIVE && |
734 | vcore->runner) | |
90fd09f8 SB |
735 | target = vcore->runner; |
736 | spin_unlock(&vcore->lock); | |
737 | ||
738 | return kvm_vcpu_yield_to(target); | |
739 | } | |
740 | ||
741 | static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu) | |
742 | { | |
743 | int yield_count = 0; | |
744 | struct lppaca *lppaca; | |
745 | ||
746 | spin_lock(&vcpu->arch.vpa_update_lock); | |
747 | lppaca = (struct lppaca *)vcpu->arch.vpa.pinned_addr; | |
748 | if (lppaca) | |
ecb6d618 | 749 | yield_count = be32_to_cpu(lppaca->yield_count); |
90fd09f8 SB |
750 | spin_unlock(&vcpu->arch.vpa_update_lock); |
751 | return yield_count; | |
752 | } | |
753 | ||
a8606e20 PM |
754 | int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) |
755 | { | |
756 | unsigned long req = kvmppc_get_gpr(vcpu, 3); | |
757 | unsigned long target, ret = H_SUCCESS; | |
90fd09f8 | 758 | int yield_count; |
a8606e20 | 759 | struct kvm_vcpu *tvcpu; |
8e591cb7 | 760 | int idx, rc; |
a8606e20 | 761 | |
699a0ea0 PM |
762 | if (req <= MAX_HCALL_OPCODE && |
763 | !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls)) | |
764 | return RESUME_HOST; | |
765 | ||
a8606e20 PM |
766 | switch (req) { |
767 | case H_CEDE: | |
a8606e20 PM |
768 | break; |
769 | case H_PROD: | |
770 | target = kvmppc_get_gpr(vcpu, 4); | |
771 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
772 | if (!tvcpu) { | |
773 | ret = H_PARAMETER; | |
774 | break; | |
775 | } | |
776 | tvcpu->arch.prodded = 1; | |
777 | smp_mb(); | |
8464c884 PM |
778 | if (tvcpu->arch.ceded) |
779 | kvmppc_fast_vcpu_kick_hv(tvcpu); | |
a8606e20 PM |
780 | break; |
781 | case H_CONFER: | |
42d7604d PM |
782 | target = kvmppc_get_gpr(vcpu, 4); |
783 | if (target == -1) | |
784 | break; | |
785 | tvcpu = kvmppc_find_vcpu(vcpu->kvm, target); | |
786 | if (!tvcpu) { | |
787 | ret = H_PARAMETER; | |
788 | break; | |
789 | } | |
90fd09f8 SB |
790 | yield_count = kvmppc_get_gpr(vcpu, 5); |
791 | if (kvmppc_get_yield_count(tvcpu) != yield_count) | |
792 | break; | |
793 | kvm_arch_vcpu_yield_to(tvcpu); | |
a8606e20 PM |
794 | break; |
795 | case H_REGISTER_VPA: | |
796 | ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4), | |
797 | kvmppc_get_gpr(vcpu, 5), | |
798 | kvmppc_get_gpr(vcpu, 6)); | |
799 | break; | |
8e591cb7 ME |
800 | case H_RTAS: |
801 | if (list_empty(&vcpu->kvm->arch.rtas_tokens)) | |
802 | return RESUME_HOST; | |
803 | ||
c9438092 | 804 | idx = srcu_read_lock(&vcpu->kvm->srcu); |
8e591cb7 | 805 | rc = kvmppc_rtas_hcall(vcpu); |
c9438092 | 806 | srcu_read_unlock(&vcpu->kvm->srcu, idx); |
8e591cb7 ME |
807 | |
808 | if (rc == -ENOENT) | |
809 | return RESUME_HOST; | |
810 | else if (rc == 0) | |
811 | break; | |
812 | ||
813 | /* Send the error out to userspace via KVM_RUN */ | |
814 | return rc; | |
99342cf8 DG |
815 | case H_LOGICAL_CI_LOAD: |
816 | ret = kvmppc_h_logical_ci_load(vcpu); | |
817 | if (ret == H_TOO_HARD) | |
818 | return RESUME_HOST; | |
819 | break; | |
820 | case H_LOGICAL_CI_STORE: | |
821 | ret = kvmppc_h_logical_ci_store(vcpu); | |
822 | if (ret == H_TOO_HARD) | |
823 | return RESUME_HOST; | |
824 | break; | |
9642382e MN |
825 | case H_SET_MODE: |
826 | ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4), | |
827 | kvmppc_get_gpr(vcpu, 5), | |
828 | kvmppc_get_gpr(vcpu, 6), | |
829 | kvmppc_get_gpr(vcpu, 7)); | |
830 | if (ret == H_TOO_HARD) | |
831 | return RESUME_HOST; | |
832 | break; | |
bc5ad3f3 BH |
833 | case H_XIRR: |
834 | case H_CPPR: | |
835 | case H_EOI: | |
836 | case H_IPI: | |
8e44ddc3 PM |
837 | case H_IPOLL: |
838 | case H_XIRR_X: | |
bc5ad3f3 BH |
839 | if (kvmppc_xics_enabled(vcpu)) { |
840 | ret = kvmppc_xics_hcall(vcpu, req); | |
841 | break; | |
d3695aa4 AK |
842 | } |
843 | return RESUME_HOST; | |
844 | case H_PUT_TCE: | |
845 | ret = kvmppc_h_put_tce(vcpu, kvmppc_get_gpr(vcpu, 4), | |
846 | kvmppc_get_gpr(vcpu, 5), | |
847 | kvmppc_get_gpr(vcpu, 6)); | |
848 | if (ret == H_TOO_HARD) | |
849 | return RESUME_HOST; | |
850 | break; | |
851 | case H_PUT_TCE_INDIRECT: | |
852 | ret = kvmppc_h_put_tce_indirect(vcpu, kvmppc_get_gpr(vcpu, 4), | |
853 | kvmppc_get_gpr(vcpu, 5), | |
854 | kvmppc_get_gpr(vcpu, 6), | |
855 | kvmppc_get_gpr(vcpu, 7)); | |
856 | if (ret == H_TOO_HARD) | |
857 | return RESUME_HOST; | |
858 | break; | |
859 | case H_STUFF_TCE: | |
860 | ret = kvmppc_h_stuff_tce(vcpu, kvmppc_get_gpr(vcpu, 4), | |
861 | kvmppc_get_gpr(vcpu, 5), | |
862 | kvmppc_get_gpr(vcpu, 6), | |
863 | kvmppc_get_gpr(vcpu, 7)); | |
864 | if (ret == H_TOO_HARD) | |
865 | return RESUME_HOST; | |
866 | break; | |
a8606e20 PM |
867 | default: |
868 | return RESUME_HOST; | |
869 | } | |
870 | kvmppc_set_gpr(vcpu, 3, ret); | |
871 | vcpu->arch.hcall_needed = 0; | |
872 | return RESUME_GUEST; | |
873 | } | |
874 | ||
ae2113a4 PM |
875 | static int kvmppc_hcall_impl_hv(unsigned long cmd) |
876 | { | |
877 | switch (cmd) { | |
878 | case H_CEDE: | |
879 | case H_PROD: | |
880 | case H_CONFER: | |
881 | case H_REGISTER_VPA: | |
9642382e | 882 | case H_SET_MODE: |
99342cf8 DG |
883 | case H_LOGICAL_CI_LOAD: |
884 | case H_LOGICAL_CI_STORE: | |
ae2113a4 PM |
885 | #ifdef CONFIG_KVM_XICS |
886 | case H_XIRR: | |
887 | case H_CPPR: | |
888 | case H_EOI: | |
889 | case H_IPI: | |
890 | case H_IPOLL: | |
891 | case H_XIRR_X: | |
892 | #endif | |
893 | return 1; | |
894 | } | |
895 | ||
896 | /* See if it's in the real-mode table */ | |
897 | return kvmppc_hcall_impl_hv_realmode(cmd); | |
898 | } | |
899 | ||
a59c1d9e MS |
900 | static int kvmppc_emulate_debug_inst(struct kvm_run *run, |
901 | struct kvm_vcpu *vcpu) | |
902 | { | |
903 | u32 last_inst; | |
904 | ||
905 | if (kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst) != | |
906 | EMULATE_DONE) { | |
907 | /* | |
908 | * Fetch failed, so return to guest and | |
909 | * try executing it again. | |
910 | */ | |
911 | return RESUME_GUEST; | |
912 | } | |
913 | ||
914 | if (last_inst == KVMPPC_INST_SW_BREAKPOINT) { | |
915 | run->exit_reason = KVM_EXIT_DEBUG; | |
916 | run->debug.arch.address = kvmppc_get_pc(vcpu); | |
917 | return RESUME_HOST; | |
918 | } else { | |
919 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
920 | return RESUME_GUEST; | |
921 | } | |
922 | } | |
923 | ||
3a167bea AK |
924 | static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, |
925 | struct task_struct *tsk) | |
de56a948 PM |
926 | { |
927 | int r = RESUME_HOST; | |
928 | ||
929 | vcpu->stat.sum_exits++; | |
930 | ||
1c9e3d51 PM |
931 | /* |
932 | * This can happen if an interrupt occurs in the last stages | |
933 | * of guest entry or the first stages of guest exit (i.e. after | |
934 | * setting paca->kvm_hstate.in_guest to KVM_GUEST_MODE_GUEST_HV | |
935 | * and before setting it to KVM_GUEST_MODE_HOST_HV). | |
936 | * That can happen due to a bug, or due to a machine check | |
937 | * occurring at just the wrong time. | |
938 | */ | |
939 | if (vcpu->arch.shregs.msr & MSR_HV) { | |
940 | printk(KERN_EMERG "KVM trap in HV mode!\n"); | |
941 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
942 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
943 | vcpu->arch.shregs.msr); | |
944 | kvmppc_dump_regs(vcpu); | |
945 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
946 | run->hw.hardware_exit_reason = vcpu->arch.trap; | |
947 | return RESUME_HOST; | |
948 | } | |
de56a948 PM |
949 | run->exit_reason = KVM_EXIT_UNKNOWN; |
950 | run->ready_for_interrupt_injection = 1; | |
951 | switch (vcpu->arch.trap) { | |
952 | /* We're good on these - the host merely wanted to get our attention */ | |
953 | case BOOK3S_INTERRUPT_HV_DECREMENTER: | |
954 | vcpu->stat.dec_exits++; | |
955 | r = RESUME_GUEST; | |
956 | break; | |
957 | case BOOK3S_INTERRUPT_EXTERNAL: | |
5d00f66b | 958 | case BOOK3S_INTERRUPT_H_DOORBELL: |
84f7139c | 959 | case BOOK3S_INTERRUPT_H_VIRT: |
de56a948 PM |
960 | vcpu->stat.ext_intr_exits++; |
961 | r = RESUME_GUEST; | |
962 | break; | |
dee6f24c MS |
963 | /* HMI is hypervisor interrupt and host has handled it. Resume guest.*/ |
964 | case BOOK3S_INTERRUPT_HMI: | |
de56a948 PM |
965 | case BOOK3S_INTERRUPT_PERFMON: |
966 | r = RESUME_GUEST; | |
967 | break; | |
b4072df4 PM |
968 | case BOOK3S_INTERRUPT_MACHINE_CHECK: |
969 | /* | |
970 | * Deliver a machine check interrupt to the guest. | |
971 | * We have to do this, even if the host has handled the | |
972 | * machine check, because machine checks use SRR0/1 and | |
973 | * the interrupt might have trashed guest state in them. | |
974 | */ | |
975 | kvmppc_book3s_queue_irqprio(vcpu, | |
976 | BOOK3S_INTERRUPT_MACHINE_CHECK); | |
977 | r = RESUME_GUEST; | |
978 | break; | |
de56a948 PM |
979 | case BOOK3S_INTERRUPT_PROGRAM: |
980 | { | |
981 | ulong flags; | |
982 | /* | |
983 | * Normally program interrupts are delivered directly | |
984 | * to the guest by the hardware, but we can get here | |
985 | * as a result of a hypervisor emulation interrupt | |
986 | * (e40) getting turned into a 700 by BML RTAS. | |
987 | */ | |
988 | flags = vcpu->arch.shregs.msr & 0x1f0000ull; | |
989 | kvmppc_core_queue_program(vcpu, flags); | |
990 | r = RESUME_GUEST; | |
991 | break; | |
992 | } | |
993 | case BOOK3S_INTERRUPT_SYSCALL: | |
994 | { | |
995 | /* hcall - punt to userspace */ | |
996 | int i; | |
997 | ||
27025a60 LPF |
998 | /* hypercall with MSR_PR has already been handled in rmode, |
999 | * and never reaches here. | |
1000 | */ | |
1001 | ||
de56a948 PM |
1002 | run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3); |
1003 | for (i = 0; i < 9; ++i) | |
1004 | run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i); | |
1005 | run->exit_reason = KVM_EXIT_PAPR_HCALL; | |
1006 | vcpu->arch.hcall_needed = 1; | |
1007 | r = RESUME_HOST; | |
1008 | break; | |
1009 | } | |
1010 | /* | |
342d3db7 PM |
1011 | * We get these next two if the guest accesses a page which it thinks |
1012 | * it has mapped but which is not actually present, either because | |
1013 | * it is for an emulated I/O device or because the corresonding | |
1014 | * host page has been paged out. Any other HDSI/HISI interrupts | |
1015 | * have been handled already. | |
de56a948 PM |
1016 | */ |
1017 | case BOOK3S_INTERRUPT_H_DATA_STORAGE: | |
913d3ff9 | 1018 | r = RESUME_PAGE_FAULT; |
de56a948 PM |
1019 | break; |
1020 | case BOOK3S_INTERRUPT_H_INST_STORAGE: | |
913d3ff9 PM |
1021 | vcpu->arch.fault_dar = kvmppc_get_pc(vcpu); |
1022 | vcpu->arch.fault_dsisr = 0; | |
1023 | r = RESUME_PAGE_FAULT; | |
de56a948 PM |
1024 | break; |
1025 | /* | |
1026 | * This occurs if the guest executes an illegal instruction. | |
a59c1d9e MS |
1027 | * If the guest debug is disabled, generate a program interrupt |
1028 | * to the guest. If guest debug is enabled, we need to check | |
1029 | * whether the instruction is a software breakpoint instruction. | |
1030 | * Accordingly return to Guest or Host. | |
de56a948 PM |
1031 | */ |
1032 | case BOOK3S_INTERRUPT_H_EMUL_ASSIST: | |
4a157d61 PM |
1033 | if (vcpu->arch.emul_inst != KVM_INST_FETCH_FAILED) |
1034 | vcpu->arch.last_inst = kvmppc_need_byteswap(vcpu) ? | |
1035 | swab32(vcpu->arch.emul_inst) : | |
1036 | vcpu->arch.emul_inst; | |
a59c1d9e MS |
1037 | if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP) { |
1038 | r = kvmppc_emulate_debug_inst(run, vcpu); | |
1039 | } else { | |
1040 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
1041 | r = RESUME_GUEST; | |
1042 | } | |
bd3048b8 ME |
1043 | break; |
1044 | /* | |
1045 | * This occurs if the guest (kernel or userspace), does something that | |
1046 | * is prohibited by HFSCR. We just generate a program interrupt to | |
1047 | * the guest. | |
1048 | */ | |
1049 | case BOOK3S_INTERRUPT_H_FAC_UNAVAIL: | |
1050 | kvmppc_core_queue_program(vcpu, SRR1_PROGILL); | |
de56a948 PM |
1051 | r = RESUME_GUEST; |
1052 | break; | |
f7af5209 SW |
1053 | case BOOK3S_INTERRUPT_HV_RM_HARD: |
1054 | r = RESUME_PASSTHROUGH; | |
1055 | break; | |
de56a948 PM |
1056 | default: |
1057 | kvmppc_dump_regs(vcpu); | |
1058 | printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n", | |
1059 | vcpu->arch.trap, kvmppc_get_pc(vcpu), | |
1060 | vcpu->arch.shregs.msr); | |
f3271d4c | 1061 | run->hw.hardware_exit_reason = vcpu->arch.trap; |
de56a948 | 1062 | r = RESUME_HOST; |
de56a948 PM |
1063 | break; |
1064 | } | |
1065 | ||
de56a948 PM |
1066 | return r; |
1067 | } | |
1068 | ||
3a167bea AK |
1069 | static int kvm_arch_vcpu_ioctl_get_sregs_hv(struct kvm_vcpu *vcpu, |
1070 | struct kvm_sregs *sregs) | |
de56a948 PM |
1071 | { |
1072 | int i; | |
1073 | ||
de56a948 | 1074 | memset(sregs, 0, sizeof(struct kvm_sregs)); |
87916442 | 1075 | sregs->pvr = vcpu->arch.pvr; |
de56a948 PM |
1076 | for (i = 0; i < vcpu->arch.slb_max; i++) { |
1077 | sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige; | |
1078 | sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv; | |
1079 | } | |
1080 | ||
1081 | return 0; | |
1082 | } | |
1083 | ||
3a167bea AK |
1084 | static int kvm_arch_vcpu_ioctl_set_sregs_hv(struct kvm_vcpu *vcpu, |
1085 | struct kvm_sregs *sregs) | |
de56a948 PM |
1086 | { |
1087 | int i, j; | |
1088 | ||
9333e6c4 PM |
1089 | /* Only accept the same PVR as the host's, since we can't spoof it */ |
1090 | if (sregs->pvr != vcpu->arch.pvr) | |
1091 | return -EINVAL; | |
de56a948 PM |
1092 | |
1093 | j = 0; | |
1094 | for (i = 0; i < vcpu->arch.slb_nr; i++) { | |
1095 | if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) { | |
1096 | vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe; | |
1097 | vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv; | |
1098 | ++j; | |
1099 | } | |
1100 | } | |
1101 | vcpu->arch.slb_max = j; | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
a0840240 AK |
1106 | static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr, |
1107 | bool preserve_top32) | |
a0144e2a | 1108 | { |
8f902b00 | 1109 | struct kvm *kvm = vcpu->kvm; |
a0144e2a PM |
1110 | struct kvmppc_vcore *vc = vcpu->arch.vcore; |
1111 | u64 mask; | |
1112 | ||
8f902b00 | 1113 | mutex_lock(&kvm->lock); |
a0144e2a | 1114 | spin_lock(&vc->lock); |
d682916a AB |
1115 | /* |
1116 | * If ILE (interrupt little-endian) has changed, update the | |
1117 | * MSR_LE bit in the intr_msr for each vcpu in this vcore. | |
1118 | */ | |
1119 | if ((new_lpcr & LPCR_ILE) != (vc->lpcr & LPCR_ILE)) { | |
d682916a AB |
1120 | struct kvm_vcpu *vcpu; |
1121 | int i; | |
1122 | ||
d682916a AB |
1123 | kvm_for_each_vcpu(i, vcpu, kvm) { |
1124 | if (vcpu->arch.vcore != vc) | |
1125 | continue; | |
1126 | if (new_lpcr & LPCR_ILE) | |
1127 | vcpu->arch.intr_msr |= MSR_LE; | |
1128 | else | |
1129 | vcpu->arch.intr_msr &= ~MSR_LE; | |
1130 | } | |
d682916a AB |
1131 | } |
1132 | ||
a0144e2a PM |
1133 | /* |
1134 | * Userspace can only modify DPFD (default prefetch depth), | |
1135 | * ILE (interrupt little-endian) and TC (translation control). | |
8cf4ecc0 | 1136 | * On POWER8 and POWER9 userspace can also modify AIL (alt. interrupt loc.). |
a0144e2a PM |
1137 | */ |
1138 | mask = LPCR_DPFD | LPCR_ILE | LPCR_TC; | |
e0622bd9 PM |
1139 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) |
1140 | mask |= LPCR_AIL; | |
a0840240 AK |
1141 | |
1142 | /* Broken 32-bit version of LPCR must not clear top bits */ | |
1143 | if (preserve_top32) | |
1144 | mask &= 0xFFFFFFFF; | |
a0144e2a PM |
1145 | vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); |
1146 | spin_unlock(&vc->lock); | |
8f902b00 | 1147 | mutex_unlock(&kvm->lock); |
a0144e2a PM |
1148 | } |
1149 | ||
3a167bea AK |
1150 | static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1151 | union kvmppc_one_reg *val) | |
31f3438e | 1152 | { |
a136a8bd PM |
1153 | int r = 0; |
1154 | long int i; | |
31f3438e | 1155 | |
a136a8bd | 1156 | switch (id) { |
a59c1d9e MS |
1157 | case KVM_REG_PPC_DEBUG_INST: |
1158 | *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT); | |
1159 | break; | |
31f3438e | 1160 | case KVM_REG_PPC_HIOR: |
a136a8bd PM |
1161 | *val = get_reg_val(id, 0); |
1162 | break; | |
1163 | case KVM_REG_PPC_DABR: | |
1164 | *val = get_reg_val(id, vcpu->arch.dabr); | |
1165 | break; | |
8563bf52 PM |
1166 | case KVM_REG_PPC_DABRX: |
1167 | *val = get_reg_val(id, vcpu->arch.dabrx); | |
1168 | break; | |
a136a8bd PM |
1169 | case KVM_REG_PPC_DSCR: |
1170 | *val = get_reg_val(id, vcpu->arch.dscr); | |
1171 | break; | |
1172 | case KVM_REG_PPC_PURR: | |
1173 | *val = get_reg_val(id, vcpu->arch.purr); | |
1174 | break; | |
1175 | case KVM_REG_PPC_SPURR: | |
1176 | *val = get_reg_val(id, vcpu->arch.spurr); | |
1177 | break; | |
1178 | case KVM_REG_PPC_AMR: | |
1179 | *val = get_reg_val(id, vcpu->arch.amr); | |
1180 | break; | |
1181 | case KVM_REG_PPC_UAMOR: | |
1182 | *val = get_reg_val(id, vcpu->arch.uamor); | |
1183 | break; | |
b005255e | 1184 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1185 | i = id - KVM_REG_PPC_MMCR0; |
1186 | *val = get_reg_val(id, vcpu->arch.mmcr[i]); | |
1187 | break; | |
1188 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1189 | i = id - KVM_REG_PPC_PMC1; | |
1190 | *val = get_reg_val(id, vcpu->arch.pmc[i]); | |
31f3438e | 1191 | break; |
b005255e MN |
1192 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1193 | i = id - KVM_REG_PPC_SPMC1; | |
1194 | *val = get_reg_val(id, vcpu->arch.spmc[i]); | |
1195 | break; | |
14941789 PM |
1196 | case KVM_REG_PPC_SIAR: |
1197 | *val = get_reg_val(id, vcpu->arch.siar); | |
1198 | break; | |
1199 | case KVM_REG_PPC_SDAR: | |
1200 | *val = get_reg_val(id, vcpu->arch.sdar); | |
1201 | break; | |
b005255e MN |
1202 | case KVM_REG_PPC_SIER: |
1203 | *val = get_reg_val(id, vcpu->arch.sier); | |
a8bd19ef | 1204 | break; |
b005255e MN |
1205 | case KVM_REG_PPC_IAMR: |
1206 | *val = get_reg_val(id, vcpu->arch.iamr); | |
1207 | break; | |
b005255e MN |
1208 | case KVM_REG_PPC_PSPB: |
1209 | *val = get_reg_val(id, vcpu->arch.pspb); | |
1210 | break; | |
b005255e MN |
1211 | case KVM_REG_PPC_DPDES: |
1212 | *val = get_reg_val(id, vcpu->arch.vcore->dpdes); | |
1213 | break; | |
88b02cf9 PM |
1214 | case KVM_REG_PPC_VTB: |
1215 | *val = get_reg_val(id, vcpu->arch.vcore->vtb); | |
1216 | break; | |
b005255e MN |
1217 | case KVM_REG_PPC_DAWR: |
1218 | *val = get_reg_val(id, vcpu->arch.dawr); | |
1219 | break; | |
1220 | case KVM_REG_PPC_DAWRX: | |
1221 | *val = get_reg_val(id, vcpu->arch.dawrx); | |
1222 | break; | |
1223 | case KVM_REG_PPC_CIABR: | |
1224 | *val = get_reg_val(id, vcpu->arch.ciabr); | |
1225 | break; | |
b005255e MN |
1226 | case KVM_REG_PPC_CSIGR: |
1227 | *val = get_reg_val(id, vcpu->arch.csigr); | |
1228 | break; | |
1229 | case KVM_REG_PPC_TACR: | |
1230 | *val = get_reg_val(id, vcpu->arch.tacr); | |
1231 | break; | |
1232 | case KVM_REG_PPC_TCSCR: | |
1233 | *val = get_reg_val(id, vcpu->arch.tcscr); | |
1234 | break; | |
1235 | case KVM_REG_PPC_PID: | |
1236 | *val = get_reg_val(id, vcpu->arch.pid); | |
1237 | break; | |
1238 | case KVM_REG_PPC_ACOP: | |
1239 | *val = get_reg_val(id, vcpu->arch.acop); | |
1240 | break; | |
1241 | case KVM_REG_PPC_WORT: | |
1242 | *val = get_reg_val(id, vcpu->arch.wort); | |
a8bd19ef | 1243 | break; |
e9cf1e08 PM |
1244 | case KVM_REG_PPC_TIDR: |
1245 | *val = get_reg_val(id, vcpu->arch.tid); | |
1246 | break; | |
1247 | case KVM_REG_PPC_PSSCR: | |
1248 | *val = get_reg_val(id, vcpu->arch.psscr); | |
1249 | break; | |
55b665b0 PM |
1250 | case KVM_REG_PPC_VPA_ADDR: |
1251 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1252 | *val = get_reg_val(id, vcpu->arch.vpa.next_gpa); | |
1253 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1254 | break; | |
1255 | case KVM_REG_PPC_VPA_SLB: | |
1256 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1257 | val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa; | |
1258 | val->vpaval.length = vcpu->arch.slb_shadow.len; | |
1259 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1260 | break; | |
1261 | case KVM_REG_PPC_VPA_DTL: | |
1262 | spin_lock(&vcpu->arch.vpa_update_lock); | |
1263 | val->vpaval.addr = vcpu->arch.dtl.next_gpa; | |
1264 | val->vpaval.length = vcpu->arch.dtl.len; | |
1265 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
1266 | break; | |
93b0f4dc PM |
1267 | case KVM_REG_PPC_TB_OFFSET: |
1268 | *val = get_reg_val(id, vcpu->arch.vcore->tb_offset); | |
1269 | break; | |
a0144e2a | 1270 | case KVM_REG_PPC_LPCR: |
a0840240 | 1271 | case KVM_REG_PPC_LPCR_64: |
a0144e2a PM |
1272 | *val = get_reg_val(id, vcpu->arch.vcore->lpcr); |
1273 | break; | |
4b8473c9 PM |
1274 | case KVM_REG_PPC_PPR: |
1275 | *val = get_reg_val(id, vcpu->arch.ppr); | |
1276 | break; | |
a7d80d01 MN |
1277 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1278 | case KVM_REG_PPC_TFHAR: | |
1279 | *val = get_reg_val(id, vcpu->arch.tfhar); | |
1280 | break; | |
1281 | case KVM_REG_PPC_TFIAR: | |
1282 | *val = get_reg_val(id, vcpu->arch.tfiar); | |
1283 | break; | |
1284 | case KVM_REG_PPC_TEXASR: | |
1285 | *val = get_reg_val(id, vcpu->arch.texasr); | |
1286 | break; | |
1287 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1288 | i = id - KVM_REG_PPC_TM_GPR0; | |
1289 | *val = get_reg_val(id, vcpu->arch.gpr_tm[i]); | |
1290 | break; | |
1291 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1292 | { | |
1293 | int j; | |
1294 | i = id - KVM_REG_PPC_TM_VSR0; | |
1295 | if (i < 32) | |
1296 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1297 | val->vsxval[j] = vcpu->arch.fp_tm.fpr[i][j]; | |
1298 | else { | |
1299 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1300 | val->vval = vcpu->arch.vr_tm.vr[i-32]; | |
1301 | else | |
1302 | r = -ENXIO; | |
1303 | } | |
1304 | break; | |
1305 | } | |
1306 | case KVM_REG_PPC_TM_CR: | |
1307 | *val = get_reg_val(id, vcpu->arch.cr_tm); | |
1308 | break; | |
0d808df0 PM |
1309 | case KVM_REG_PPC_TM_XER: |
1310 | *val = get_reg_val(id, vcpu->arch.xer_tm); | |
1311 | break; | |
a7d80d01 MN |
1312 | case KVM_REG_PPC_TM_LR: |
1313 | *val = get_reg_val(id, vcpu->arch.lr_tm); | |
1314 | break; | |
1315 | case KVM_REG_PPC_TM_CTR: | |
1316 | *val = get_reg_val(id, vcpu->arch.ctr_tm); | |
1317 | break; | |
1318 | case KVM_REG_PPC_TM_FPSCR: | |
1319 | *val = get_reg_val(id, vcpu->arch.fp_tm.fpscr); | |
1320 | break; | |
1321 | case KVM_REG_PPC_TM_AMR: | |
1322 | *val = get_reg_val(id, vcpu->arch.amr_tm); | |
1323 | break; | |
1324 | case KVM_REG_PPC_TM_PPR: | |
1325 | *val = get_reg_val(id, vcpu->arch.ppr_tm); | |
1326 | break; | |
1327 | case KVM_REG_PPC_TM_VRSAVE: | |
1328 | *val = get_reg_val(id, vcpu->arch.vrsave_tm); | |
1329 | break; | |
1330 | case KVM_REG_PPC_TM_VSCR: | |
1331 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1332 | *val = get_reg_val(id, vcpu->arch.vr_tm.vscr.u[3]); | |
1333 | else | |
1334 | r = -ENXIO; | |
1335 | break; | |
1336 | case KVM_REG_PPC_TM_DSCR: | |
1337 | *val = get_reg_val(id, vcpu->arch.dscr_tm); | |
1338 | break; | |
1339 | case KVM_REG_PPC_TM_TAR: | |
1340 | *val = get_reg_val(id, vcpu->arch.tar_tm); | |
1341 | break; | |
1342 | #endif | |
388cc6e1 PM |
1343 | case KVM_REG_PPC_ARCH_COMPAT: |
1344 | *val = get_reg_val(id, vcpu->arch.vcore->arch_compat); | |
1345 | break; | |
31f3438e | 1346 | default: |
a136a8bd | 1347 | r = -EINVAL; |
31f3438e PM |
1348 | break; |
1349 | } | |
1350 | ||
1351 | return r; | |
1352 | } | |
1353 | ||
3a167bea AK |
1354 | static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, |
1355 | union kvmppc_one_reg *val) | |
31f3438e | 1356 | { |
a136a8bd PM |
1357 | int r = 0; |
1358 | long int i; | |
55b665b0 | 1359 | unsigned long addr, len; |
31f3438e | 1360 | |
a136a8bd | 1361 | switch (id) { |
31f3438e | 1362 | case KVM_REG_PPC_HIOR: |
31f3438e | 1363 | /* Only allow this to be set to zero */ |
a136a8bd | 1364 | if (set_reg_val(id, *val)) |
31f3438e PM |
1365 | r = -EINVAL; |
1366 | break; | |
a136a8bd PM |
1367 | case KVM_REG_PPC_DABR: |
1368 | vcpu->arch.dabr = set_reg_val(id, *val); | |
1369 | break; | |
8563bf52 PM |
1370 | case KVM_REG_PPC_DABRX: |
1371 | vcpu->arch.dabrx = set_reg_val(id, *val) & ~DABRX_HYP; | |
1372 | break; | |
a136a8bd PM |
1373 | case KVM_REG_PPC_DSCR: |
1374 | vcpu->arch.dscr = set_reg_val(id, *val); | |
1375 | break; | |
1376 | case KVM_REG_PPC_PURR: | |
1377 | vcpu->arch.purr = set_reg_val(id, *val); | |
1378 | break; | |
1379 | case KVM_REG_PPC_SPURR: | |
1380 | vcpu->arch.spurr = set_reg_val(id, *val); | |
1381 | break; | |
1382 | case KVM_REG_PPC_AMR: | |
1383 | vcpu->arch.amr = set_reg_val(id, *val); | |
1384 | break; | |
1385 | case KVM_REG_PPC_UAMOR: | |
1386 | vcpu->arch.uamor = set_reg_val(id, *val); | |
1387 | break; | |
b005255e | 1388 | case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRS: |
a136a8bd PM |
1389 | i = id - KVM_REG_PPC_MMCR0; |
1390 | vcpu->arch.mmcr[i] = set_reg_val(id, *val); | |
1391 | break; | |
1392 | case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8: | |
1393 | i = id - KVM_REG_PPC_PMC1; | |
1394 | vcpu->arch.pmc[i] = set_reg_val(id, *val); | |
1395 | break; | |
b005255e MN |
1396 | case KVM_REG_PPC_SPMC1 ... KVM_REG_PPC_SPMC2: |
1397 | i = id - KVM_REG_PPC_SPMC1; | |
1398 | vcpu->arch.spmc[i] = set_reg_val(id, *val); | |
1399 | break; | |
14941789 PM |
1400 | case KVM_REG_PPC_SIAR: |
1401 | vcpu->arch.siar = set_reg_val(id, *val); | |
1402 | break; | |
1403 | case KVM_REG_PPC_SDAR: | |
1404 | vcpu->arch.sdar = set_reg_val(id, *val); | |
1405 | break; | |
b005255e MN |
1406 | case KVM_REG_PPC_SIER: |
1407 | vcpu->arch.sier = set_reg_val(id, *val); | |
a8bd19ef | 1408 | break; |
b005255e MN |
1409 | case KVM_REG_PPC_IAMR: |
1410 | vcpu->arch.iamr = set_reg_val(id, *val); | |
1411 | break; | |
b005255e MN |
1412 | case KVM_REG_PPC_PSPB: |
1413 | vcpu->arch.pspb = set_reg_val(id, *val); | |
1414 | break; | |
b005255e MN |
1415 | case KVM_REG_PPC_DPDES: |
1416 | vcpu->arch.vcore->dpdes = set_reg_val(id, *val); | |
1417 | break; | |
88b02cf9 PM |
1418 | case KVM_REG_PPC_VTB: |
1419 | vcpu->arch.vcore->vtb = set_reg_val(id, *val); | |
1420 | break; | |
b005255e MN |
1421 | case KVM_REG_PPC_DAWR: |
1422 | vcpu->arch.dawr = set_reg_val(id, *val); | |
1423 | break; | |
1424 | case KVM_REG_PPC_DAWRX: | |
1425 | vcpu->arch.dawrx = set_reg_val(id, *val) & ~DAWRX_HYP; | |
1426 | break; | |
1427 | case KVM_REG_PPC_CIABR: | |
1428 | vcpu->arch.ciabr = set_reg_val(id, *val); | |
1429 | /* Don't allow setting breakpoints in hypervisor code */ | |
1430 | if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER) | |
1431 | vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */ | |
1432 | break; | |
b005255e MN |
1433 | case KVM_REG_PPC_CSIGR: |
1434 | vcpu->arch.csigr = set_reg_val(id, *val); | |
1435 | break; | |
1436 | case KVM_REG_PPC_TACR: | |
1437 | vcpu->arch.tacr = set_reg_val(id, *val); | |
1438 | break; | |
1439 | case KVM_REG_PPC_TCSCR: | |
1440 | vcpu->arch.tcscr = set_reg_val(id, *val); | |
1441 | break; | |
1442 | case KVM_REG_PPC_PID: | |
1443 | vcpu->arch.pid = set_reg_val(id, *val); | |
1444 | break; | |
1445 | case KVM_REG_PPC_ACOP: | |
1446 | vcpu->arch.acop = set_reg_val(id, *val); | |
1447 | break; | |
1448 | case KVM_REG_PPC_WORT: | |
1449 | vcpu->arch.wort = set_reg_val(id, *val); | |
a8bd19ef | 1450 | break; |
e9cf1e08 PM |
1451 | case KVM_REG_PPC_TIDR: |
1452 | vcpu->arch.tid = set_reg_val(id, *val); | |
1453 | break; | |
1454 | case KVM_REG_PPC_PSSCR: | |
1455 | vcpu->arch.psscr = set_reg_val(id, *val) & PSSCR_GUEST_VIS; | |
1456 | break; | |
55b665b0 PM |
1457 | case KVM_REG_PPC_VPA_ADDR: |
1458 | addr = set_reg_val(id, *val); | |
1459 | r = -EINVAL; | |
1460 | if (!addr && (vcpu->arch.slb_shadow.next_gpa || | |
1461 | vcpu->arch.dtl.next_gpa)) | |
1462 | break; | |
1463 | r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca)); | |
1464 | break; | |
1465 | case KVM_REG_PPC_VPA_SLB: | |
1466 | addr = val->vpaval.addr; | |
1467 | len = val->vpaval.length; | |
1468 | r = -EINVAL; | |
1469 | if (addr && !vcpu->arch.vpa.next_gpa) | |
1470 | break; | |
1471 | r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len); | |
1472 | break; | |
1473 | case KVM_REG_PPC_VPA_DTL: | |
1474 | addr = val->vpaval.addr; | |
1475 | len = val->vpaval.length; | |
1476 | r = -EINVAL; | |
9f8c8c78 PM |
1477 | if (addr && (len < sizeof(struct dtl_entry) || |
1478 | !vcpu->arch.vpa.next_gpa)) | |
55b665b0 PM |
1479 | break; |
1480 | len -= len % sizeof(struct dtl_entry); | |
1481 | r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len); | |
1482 | break; | |
93b0f4dc PM |
1483 | case KVM_REG_PPC_TB_OFFSET: |
1484 | /* round up to multiple of 2^24 */ | |
1485 | vcpu->arch.vcore->tb_offset = | |
1486 | ALIGN(set_reg_val(id, *val), 1UL << 24); | |
1487 | break; | |
a0144e2a | 1488 | case KVM_REG_PPC_LPCR: |
a0840240 AK |
1489 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), true); |
1490 | break; | |
1491 | case KVM_REG_PPC_LPCR_64: | |
1492 | kvmppc_set_lpcr(vcpu, set_reg_val(id, *val), false); | |
a0144e2a | 1493 | break; |
4b8473c9 PM |
1494 | case KVM_REG_PPC_PPR: |
1495 | vcpu->arch.ppr = set_reg_val(id, *val); | |
1496 | break; | |
a7d80d01 MN |
1497 | #ifdef CONFIG_PPC_TRANSACTIONAL_MEM |
1498 | case KVM_REG_PPC_TFHAR: | |
1499 | vcpu->arch.tfhar = set_reg_val(id, *val); | |
1500 | break; | |
1501 | case KVM_REG_PPC_TFIAR: | |
1502 | vcpu->arch.tfiar = set_reg_val(id, *val); | |
1503 | break; | |
1504 | case KVM_REG_PPC_TEXASR: | |
1505 | vcpu->arch.texasr = set_reg_val(id, *val); | |
1506 | break; | |
1507 | case KVM_REG_PPC_TM_GPR0 ... KVM_REG_PPC_TM_GPR31: | |
1508 | i = id - KVM_REG_PPC_TM_GPR0; | |
1509 | vcpu->arch.gpr_tm[i] = set_reg_val(id, *val); | |
1510 | break; | |
1511 | case KVM_REG_PPC_TM_VSR0 ... KVM_REG_PPC_TM_VSR63: | |
1512 | { | |
1513 | int j; | |
1514 | i = id - KVM_REG_PPC_TM_VSR0; | |
1515 | if (i < 32) | |
1516 | for (j = 0; j < TS_FPRWIDTH; j++) | |
1517 | vcpu->arch.fp_tm.fpr[i][j] = val->vsxval[j]; | |
1518 | else | |
1519 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1520 | vcpu->arch.vr_tm.vr[i-32] = val->vval; | |
1521 | else | |
1522 | r = -ENXIO; | |
1523 | break; | |
1524 | } | |
1525 | case KVM_REG_PPC_TM_CR: | |
1526 | vcpu->arch.cr_tm = set_reg_val(id, *val); | |
1527 | break; | |
0d808df0 PM |
1528 | case KVM_REG_PPC_TM_XER: |
1529 | vcpu->arch.xer_tm = set_reg_val(id, *val); | |
1530 | break; | |
a7d80d01 MN |
1531 | case KVM_REG_PPC_TM_LR: |
1532 | vcpu->arch.lr_tm = set_reg_val(id, *val); | |
1533 | break; | |
1534 | case KVM_REG_PPC_TM_CTR: | |
1535 | vcpu->arch.ctr_tm = set_reg_val(id, *val); | |
1536 | break; | |
1537 | case KVM_REG_PPC_TM_FPSCR: | |
1538 | vcpu->arch.fp_tm.fpscr = set_reg_val(id, *val); | |
1539 | break; | |
1540 | case KVM_REG_PPC_TM_AMR: | |
1541 | vcpu->arch.amr_tm = set_reg_val(id, *val); | |
1542 | break; | |
1543 | case KVM_REG_PPC_TM_PPR: | |
1544 | vcpu->arch.ppr_tm = set_reg_val(id, *val); | |
1545 | break; | |
1546 | case KVM_REG_PPC_TM_VRSAVE: | |
1547 | vcpu->arch.vrsave_tm = set_reg_val(id, *val); | |
1548 | break; | |
1549 | case KVM_REG_PPC_TM_VSCR: | |
1550 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
1551 | vcpu->arch.vr.vscr.u[3] = set_reg_val(id, *val); | |
1552 | else | |
1553 | r = - ENXIO; | |
1554 | break; | |
1555 | case KVM_REG_PPC_TM_DSCR: | |
1556 | vcpu->arch.dscr_tm = set_reg_val(id, *val); | |
1557 | break; | |
1558 | case KVM_REG_PPC_TM_TAR: | |
1559 | vcpu->arch.tar_tm = set_reg_val(id, *val); | |
1560 | break; | |
1561 | #endif | |
388cc6e1 PM |
1562 | case KVM_REG_PPC_ARCH_COMPAT: |
1563 | r = kvmppc_set_arch_compat(vcpu, set_reg_val(id, *val)); | |
1564 | break; | |
31f3438e | 1565 | default: |
a136a8bd | 1566 | r = -EINVAL; |
31f3438e PM |
1567 | break; |
1568 | } | |
1569 | ||
1570 | return r; | |
1571 | } | |
1572 | ||
45c940ba PM |
1573 | /* |
1574 | * On POWER9, threads are independent and can be in different partitions. | |
1575 | * Therefore we consider each thread to be a subcore. | |
1576 | * There is a restriction that all threads have to be in the same | |
1577 | * MMU mode (radix or HPT), unfortunately, but since we only support | |
1578 | * HPT guests on a HPT host so far, that isn't an impediment yet. | |
1579 | */ | |
1580 | static int threads_per_vcore(void) | |
1581 | { | |
1582 | if (cpu_has_feature(CPU_FTR_ARCH_300)) | |
1583 | return 1; | |
1584 | return threads_per_subcore; | |
1585 | } | |
1586 | ||
de9bdd1a SS |
1587 | static struct kvmppc_vcore *kvmppc_vcore_create(struct kvm *kvm, int core) |
1588 | { | |
1589 | struct kvmppc_vcore *vcore; | |
1590 | ||
1591 | vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL); | |
1592 | ||
1593 | if (vcore == NULL) | |
1594 | return NULL; | |
1595 | ||
de9bdd1a | 1596 | spin_lock_init(&vcore->lock); |
2711e248 | 1597 | spin_lock_init(&vcore->stoltb_lock); |
8577370f | 1598 | init_swait_queue_head(&vcore->wq); |
de9bdd1a SS |
1599 | vcore->preempt_tb = TB_NIL; |
1600 | vcore->lpcr = kvm->arch.lpcr; | |
45c940ba | 1601 | vcore->first_vcpuid = core * threads_per_vcore(); |
de9bdd1a | 1602 | vcore->kvm = kvm; |
ec257165 | 1603 | INIT_LIST_HEAD(&vcore->preempt_list); |
de9bdd1a SS |
1604 | |
1605 | return vcore; | |
1606 | } | |
1607 | ||
b6c295df PM |
1608 | #ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING |
1609 | static struct debugfs_timings_element { | |
1610 | const char *name; | |
1611 | size_t offset; | |
1612 | } timings[] = { | |
1613 | {"rm_entry", offsetof(struct kvm_vcpu, arch.rm_entry)}, | |
1614 | {"rm_intr", offsetof(struct kvm_vcpu, arch.rm_intr)}, | |
1615 | {"rm_exit", offsetof(struct kvm_vcpu, arch.rm_exit)}, | |
1616 | {"guest", offsetof(struct kvm_vcpu, arch.guest_time)}, | |
1617 | {"cede", offsetof(struct kvm_vcpu, arch.cede_time)}, | |
1618 | }; | |
1619 | ||
1620 | #define N_TIMINGS (sizeof(timings) / sizeof(timings[0])) | |
1621 | ||
1622 | struct debugfs_timings_state { | |
1623 | struct kvm_vcpu *vcpu; | |
1624 | unsigned int buflen; | |
1625 | char buf[N_TIMINGS * 100]; | |
1626 | }; | |
1627 | ||
1628 | static int debugfs_timings_open(struct inode *inode, struct file *file) | |
1629 | { | |
1630 | struct kvm_vcpu *vcpu = inode->i_private; | |
1631 | struct debugfs_timings_state *p; | |
1632 | ||
1633 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
1634 | if (!p) | |
1635 | return -ENOMEM; | |
1636 | ||
1637 | kvm_get_kvm(vcpu->kvm); | |
1638 | p->vcpu = vcpu; | |
1639 | file->private_data = p; | |
1640 | ||
1641 | return nonseekable_open(inode, file); | |
1642 | } | |
1643 | ||
1644 | static int debugfs_timings_release(struct inode *inode, struct file *file) | |
1645 | { | |
1646 | struct debugfs_timings_state *p = file->private_data; | |
1647 | ||
1648 | kvm_put_kvm(p->vcpu->kvm); | |
1649 | kfree(p); | |
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | static ssize_t debugfs_timings_read(struct file *file, char __user *buf, | |
1654 | size_t len, loff_t *ppos) | |
1655 | { | |
1656 | struct debugfs_timings_state *p = file->private_data; | |
1657 | struct kvm_vcpu *vcpu = p->vcpu; | |
1658 | char *s, *buf_end; | |
1659 | struct kvmhv_tb_accumulator tb; | |
1660 | u64 count; | |
1661 | loff_t pos; | |
1662 | ssize_t n; | |
1663 | int i, loops; | |
1664 | bool ok; | |
1665 | ||
1666 | if (!p->buflen) { | |
1667 | s = p->buf; | |
1668 | buf_end = s + sizeof(p->buf); | |
1669 | for (i = 0; i < N_TIMINGS; ++i) { | |
1670 | struct kvmhv_tb_accumulator *acc; | |
1671 | ||
1672 | acc = (struct kvmhv_tb_accumulator *) | |
1673 | ((unsigned long)vcpu + timings[i].offset); | |
1674 | ok = false; | |
1675 | for (loops = 0; loops < 1000; ++loops) { | |
1676 | count = acc->seqcount; | |
1677 | if (!(count & 1)) { | |
1678 | smp_rmb(); | |
1679 | tb = *acc; | |
1680 | smp_rmb(); | |
1681 | if (count == acc->seqcount) { | |
1682 | ok = true; | |
1683 | break; | |
1684 | } | |
1685 | } | |
1686 | udelay(1); | |
1687 | } | |
1688 | if (!ok) | |
1689 | snprintf(s, buf_end - s, "%s: stuck\n", | |
1690 | timings[i].name); | |
1691 | else | |
1692 | snprintf(s, buf_end - s, | |
1693 | "%s: %llu %llu %llu %llu\n", | |
1694 | timings[i].name, count / 2, | |
1695 | tb_to_ns(tb.tb_total), | |
1696 | tb_to_ns(tb.tb_min), | |
1697 | tb_to_ns(tb.tb_max)); | |
1698 | s += strlen(s); | |
1699 | } | |
1700 | p->buflen = s - p->buf; | |
1701 | } | |
1702 | ||
1703 | pos = *ppos; | |
1704 | if (pos >= p->buflen) | |
1705 | return 0; | |
1706 | if (len > p->buflen - pos) | |
1707 | len = p->buflen - pos; | |
1708 | n = copy_to_user(buf, p->buf + pos, len); | |
1709 | if (n) { | |
1710 | if (n == len) | |
1711 | return -EFAULT; | |
1712 | len -= n; | |
1713 | } | |
1714 | *ppos = pos + len; | |
1715 | return len; | |
1716 | } | |
1717 | ||
1718 | static ssize_t debugfs_timings_write(struct file *file, const char __user *buf, | |
1719 | size_t len, loff_t *ppos) | |
1720 | { | |
1721 | return -EACCES; | |
1722 | } | |
1723 | ||
1724 | static const struct file_operations debugfs_timings_ops = { | |
1725 | .owner = THIS_MODULE, | |
1726 | .open = debugfs_timings_open, | |
1727 | .release = debugfs_timings_release, | |
1728 | .read = debugfs_timings_read, | |
1729 | .write = debugfs_timings_write, | |
1730 | .llseek = generic_file_llseek, | |
1731 | }; | |
1732 | ||
1733 | /* Create a debugfs directory for the vcpu */ | |
1734 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1735 | { | |
1736 | char buf[16]; | |
1737 | struct kvm *kvm = vcpu->kvm; | |
1738 | ||
1739 | snprintf(buf, sizeof(buf), "vcpu%u", id); | |
1740 | if (IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
1741 | return; | |
1742 | vcpu->arch.debugfs_dir = debugfs_create_dir(buf, kvm->arch.debugfs_dir); | |
1743 | if (IS_ERR_OR_NULL(vcpu->arch.debugfs_dir)) | |
1744 | return; | |
1745 | vcpu->arch.debugfs_timings = | |
1746 | debugfs_create_file("timings", 0444, vcpu->arch.debugfs_dir, | |
1747 | vcpu, &debugfs_timings_ops); | |
1748 | } | |
1749 | ||
1750 | #else /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1751 | static void debugfs_vcpu_init(struct kvm_vcpu *vcpu, unsigned int id) | |
1752 | { | |
1753 | } | |
1754 | #endif /* CONFIG_KVM_BOOK3S_HV_EXIT_TIMING */ | |
1755 | ||
3a167bea AK |
1756 | static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm, |
1757 | unsigned int id) | |
de56a948 PM |
1758 | { |
1759 | struct kvm_vcpu *vcpu; | |
371fefd6 PM |
1760 | int err = -EINVAL; |
1761 | int core; | |
1762 | struct kvmppc_vcore *vcore; | |
de56a948 | 1763 | |
45c940ba | 1764 | core = id / threads_per_vcore(); |
371fefd6 PM |
1765 | if (core >= KVM_MAX_VCORES) |
1766 | goto out; | |
1767 | ||
1768 | err = -ENOMEM; | |
6b75e6bf | 1769 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
de56a948 PM |
1770 | if (!vcpu) |
1771 | goto out; | |
1772 | ||
1773 | err = kvm_vcpu_init(vcpu, kvm, id); | |
1774 | if (err) | |
1775 | goto free_vcpu; | |
1776 | ||
1777 | vcpu->arch.shared = &vcpu->arch.shregs; | |
5deb8e7a AG |
1778 | #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE |
1779 | /* | |
1780 | * The shared struct is never shared on HV, | |
1781 | * so we can always use host endianness | |
1782 | */ | |
1783 | #ifdef __BIG_ENDIAN__ | |
1784 | vcpu->arch.shared_big_endian = true; | |
1785 | #else | |
1786 | vcpu->arch.shared_big_endian = false; | |
1787 | #endif | |
1788 | #endif | |
de56a948 PM |
1789 | vcpu->arch.mmcr[0] = MMCR0_FC; |
1790 | vcpu->arch.ctrl = CTRL_RUNLATCH; | |
1791 | /* default to host PVR, since we can't spoof it */ | |
3a167bea | 1792 | kvmppc_set_pvr_hv(vcpu, mfspr(SPRN_PVR)); |
2e25aa5f | 1793 | spin_lock_init(&vcpu->arch.vpa_update_lock); |
c7b67670 PM |
1794 | spin_lock_init(&vcpu->arch.tbacct_lock); |
1795 | vcpu->arch.busy_preempt = TB_NIL; | |
d682916a | 1796 | vcpu->arch.intr_msr = MSR_SF | MSR_ME; |
de56a948 | 1797 | |
de56a948 PM |
1798 | kvmppc_mmu_book3s_hv_init(vcpu); |
1799 | ||
8455d79e | 1800 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
371fefd6 PM |
1801 | |
1802 | init_waitqueue_head(&vcpu->arch.cpu_run); | |
1803 | ||
1804 | mutex_lock(&kvm->lock); | |
1805 | vcore = kvm->arch.vcores[core]; | |
1806 | if (!vcore) { | |
de9bdd1a | 1807 | vcore = kvmppc_vcore_create(kvm, core); |
371fefd6 | 1808 | kvm->arch.vcores[core] = vcore; |
1b400ba0 | 1809 | kvm->arch.online_vcores++; |
371fefd6 PM |
1810 | } |
1811 | mutex_unlock(&kvm->lock); | |
1812 | ||
1813 | if (!vcore) | |
1814 | goto free_vcpu; | |
1815 | ||
1816 | spin_lock(&vcore->lock); | |
1817 | ++vcore->num_threads; | |
371fefd6 PM |
1818 | spin_unlock(&vcore->lock); |
1819 | vcpu->arch.vcore = vcore; | |
e0b7ec05 | 1820 | vcpu->arch.ptid = vcpu->vcpu_id - vcore->first_vcpuid; |
ec257165 | 1821 | vcpu->arch.thread_cpu = -1; |
a29ebeaf | 1822 | vcpu->arch.prev_cpu = -1; |
371fefd6 | 1823 | |
af8f38b3 AG |
1824 | vcpu->arch.cpu_type = KVM_CPU_3S_64; |
1825 | kvmppc_sanity_check(vcpu); | |
1826 | ||
b6c295df PM |
1827 | debugfs_vcpu_init(vcpu, id); |
1828 | ||
de56a948 PM |
1829 | return vcpu; |
1830 | ||
1831 | free_vcpu: | |
6b75e6bf | 1832 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1833 | out: |
1834 | return ERR_PTR(err); | |
1835 | } | |
1836 | ||
c35635ef PM |
1837 | static void unpin_vpa(struct kvm *kvm, struct kvmppc_vpa *vpa) |
1838 | { | |
1839 | if (vpa->pinned_addr) | |
1840 | kvmppc_unpin_guest_page(kvm, vpa->pinned_addr, vpa->gpa, | |
1841 | vpa->dirty); | |
1842 | } | |
1843 | ||
3a167bea | 1844 | static void kvmppc_core_vcpu_free_hv(struct kvm_vcpu *vcpu) |
de56a948 | 1845 | { |
2e25aa5f | 1846 | spin_lock(&vcpu->arch.vpa_update_lock); |
c35635ef PM |
1847 | unpin_vpa(vcpu->kvm, &vcpu->arch.dtl); |
1848 | unpin_vpa(vcpu->kvm, &vcpu->arch.slb_shadow); | |
1849 | unpin_vpa(vcpu->kvm, &vcpu->arch.vpa); | |
2e25aa5f | 1850 | spin_unlock(&vcpu->arch.vpa_update_lock); |
de56a948 | 1851 | kvm_vcpu_uninit(vcpu); |
6b75e6bf | 1852 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
de56a948 PM |
1853 | } |
1854 | ||
3a167bea AK |
1855 | static int kvmppc_core_check_requests_hv(struct kvm_vcpu *vcpu) |
1856 | { | |
1857 | /* Indicate we want to get back into the guest */ | |
1858 | return 1; | |
1859 | } | |
1860 | ||
19ccb76a | 1861 | static void kvmppc_set_timer(struct kvm_vcpu *vcpu) |
371fefd6 | 1862 | { |
19ccb76a | 1863 | unsigned long dec_nsec, now; |
371fefd6 | 1864 | |
19ccb76a PM |
1865 | now = get_tb(); |
1866 | if (now > vcpu->arch.dec_expires) { | |
1867 | /* decrementer has already gone negative */ | |
1868 | kvmppc_core_queue_dec(vcpu); | |
7e28e60e | 1869 | kvmppc_core_prepare_to_enter(vcpu); |
19ccb76a | 1870 | return; |
371fefd6 | 1871 | } |
19ccb76a PM |
1872 | dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC |
1873 | / tb_ticks_per_sec; | |
8b0e1953 | 1874 | hrtimer_start(&vcpu->arch.dec_timer, dec_nsec, HRTIMER_MODE_REL); |
19ccb76a | 1875 | vcpu->arch.timer_running = 1; |
371fefd6 PM |
1876 | } |
1877 | ||
19ccb76a | 1878 | static void kvmppc_end_cede(struct kvm_vcpu *vcpu) |
371fefd6 | 1879 | { |
19ccb76a PM |
1880 | vcpu->arch.ceded = 0; |
1881 | if (vcpu->arch.timer_running) { | |
1882 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1883 | vcpu->arch.timer_running = 0; | |
1884 | } | |
371fefd6 PM |
1885 | } |
1886 | ||
e0b7ec05 | 1887 | extern void __kvmppc_vcore_entry(void); |
de56a948 | 1888 | |
371fefd6 PM |
1889 | static void kvmppc_remove_runnable(struct kvmppc_vcore *vc, |
1890 | struct kvm_vcpu *vcpu) | |
de56a948 | 1891 | { |
c7b67670 PM |
1892 | u64 now; |
1893 | ||
371fefd6 PM |
1894 | if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
1895 | return; | |
bf3d32e1 | 1896 | spin_lock_irq(&vcpu->arch.tbacct_lock); |
c7b67670 PM |
1897 | now = mftb(); |
1898 | vcpu->arch.busy_stolen += vcore_stolen_time(vc, now) - | |
1899 | vcpu->arch.stolen_logged; | |
1900 | vcpu->arch.busy_preempt = now; | |
1901 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; | |
bf3d32e1 | 1902 | spin_unlock_irq(&vcpu->arch.tbacct_lock); |
371fefd6 | 1903 | --vc->n_runnable; |
7b5f8272 | 1904 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], NULL); |
371fefd6 PM |
1905 | } |
1906 | ||
f0888f70 PM |
1907 | static int kvmppc_grab_hwthread(int cpu) |
1908 | { | |
1909 | struct paca_struct *tpaca; | |
b754c739 | 1910 | long timeout = 10000; |
f0888f70 PM |
1911 | |
1912 | tpaca = &paca[cpu]; | |
1913 | ||
1914 | /* Ensure the thread won't go into the kernel if it wakes */ | |
7b444c67 | 1915 | tpaca->kvm_hstate.kvm_vcpu = NULL; |
b4deba5c | 1916 | tpaca->kvm_hstate.kvm_vcore = NULL; |
5d5b99cd PM |
1917 | tpaca->kvm_hstate.napping = 0; |
1918 | smp_wmb(); | |
1919 | tpaca->kvm_hstate.hwthread_req = 1; | |
f0888f70 PM |
1920 | |
1921 | /* | |
1922 | * If the thread is already executing in the kernel (e.g. handling | |
1923 | * a stray interrupt), wait for it to get back to nap mode. | |
1924 | * The smp_mb() is to ensure that our setting of hwthread_req | |
1925 | * is visible before we look at hwthread_state, so if this | |
1926 | * races with the code at system_reset_pSeries and the thread | |
1927 | * misses our setting of hwthread_req, we are sure to see its | |
1928 | * setting of hwthread_state, and vice versa. | |
1929 | */ | |
1930 | smp_mb(); | |
1931 | while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) { | |
1932 | if (--timeout <= 0) { | |
1933 | pr_err("KVM: couldn't grab cpu %d\n", cpu); | |
1934 | return -EBUSY; | |
1935 | } | |
1936 | udelay(1); | |
1937 | } | |
1938 | return 0; | |
1939 | } | |
1940 | ||
1941 | static void kvmppc_release_hwthread(int cpu) | |
1942 | { | |
1943 | struct paca_struct *tpaca; | |
1944 | ||
1945 | tpaca = &paca[cpu]; | |
1946 | tpaca->kvm_hstate.hwthread_req = 0; | |
1947 | tpaca->kvm_hstate.kvm_vcpu = NULL; | |
b4deba5c PM |
1948 | tpaca->kvm_hstate.kvm_vcore = NULL; |
1949 | tpaca->kvm_hstate.kvm_split_mode = NULL; | |
f0888f70 PM |
1950 | } |
1951 | ||
a29ebeaf PM |
1952 | static void do_nothing(void *x) |
1953 | { | |
1954 | } | |
1955 | ||
1956 | static void radix_flush_cpu(struct kvm *kvm, int cpu, struct kvm_vcpu *vcpu) | |
1957 | { | |
1958 | int i; | |
1959 | ||
1960 | cpu = cpu_first_thread_sibling(cpu); | |
1961 | cpumask_set_cpu(cpu, &kvm->arch.need_tlb_flush); | |
1962 | /* | |
1963 | * Make sure setting of bit in need_tlb_flush precedes | |
1964 | * testing of cpu_in_guest bits. The matching barrier on | |
1965 | * the other side is the first smp_mb() in kvmppc_run_core(). | |
1966 | */ | |
1967 | smp_mb(); | |
1968 | for (i = 0; i < threads_per_core; ++i) | |
1969 | if (cpumask_test_cpu(cpu + i, &kvm->arch.cpu_in_guest)) | |
1970 | smp_call_function_single(cpu + i, do_nothing, NULL, 1); | |
1971 | } | |
1972 | ||
b4deba5c | 1973 | static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc) |
371fefd6 PM |
1974 | { |
1975 | int cpu; | |
1976 | struct paca_struct *tpaca; | |
ec257165 | 1977 | struct kvmppc_vcore *mvc = vc->master_vcore; |
a29ebeaf | 1978 | struct kvm *kvm = vc->kvm; |
371fefd6 | 1979 | |
b4deba5c PM |
1980 | cpu = vc->pcpu; |
1981 | if (vcpu) { | |
1982 | if (vcpu->arch.timer_running) { | |
1983 | hrtimer_try_to_cancel(&vcpu->arch.dec_timer); | |
1984 | vcpu->arch.timer_running = 0; | |
1985 | } | |
1986 | cpu += vcpu->arch.ptid; | |
1987 | vcpu->cpu = mvc->pcpu; | |
1988 | vcpu->arch.thread_cpu = cpu; | |
a29ebeaf PM |
1989 | |
1990 | /* | |
1991 | * With radix, the guest can do TLB invalidations itself, | |
1992 | * and it could choose to use the local form (tlbiel) if | |
1993 | * it is invalidating a translation that has only ever been | |
1994 | * used on one vcpu. However, that doesn't mean it has | |
1995 | * only ever been used on one physical cpu, since vcpus | |
1996 | * can move around between pcpus. To cope with this, when | |
1997 | * a vcpu moves from one pcpu to another, we need to tell | |
1998 | * any vcpus running on the same core as this vcpu previously | |
1999 | * ran to flush the TLB. The TLB is shared between threads, | |
2000 | * so we use a single bit in .need_tlb_flush for all 4 threads. | |
2001 | */ | |
2002 | if (kvm_is_radix(kvm) && vcpu->arch.prev_cpu != cpu) { | |
2003 | if (vcpu->arch.prev_cpu >= 0 && | |
2004 | cpu_first_thread_sibling(vcpu->arch.prev_cpu) != | |
2005 | cpu_first_thread_sibling(cpu)) | |
2006 | radix_flush_cpu(kvm, vcpu->arch.prev_cpu, vcpu); | |
2007 | vcpu->arch.prev_cpu = cpu; | |
2008 | } | |
2009 | cpumask_set_cpu(cpu, &kvm->arch.cpu_in_guest); | |
19ccb76a | 2010 | } |
371fefd6 | 2011 | tpaca = &paca[cpu]; |
5d5b99cd | 2012 | tpaca->kvm_hstate.kvm_vcpu = vcpu; |
ec257165 | 2013 | tpaca->kvm_hstate.ptid = cpu - mvc->pcpu; |
ec257165 | 2014 | /* Order stores to hstate.kvm_vcpu etc. before store to kvm_vcore */ |
371fefd6 | 2015 | smp_wmb(); |
b4deba5c | 2016 | tpaca->kvm_hstate.kvm_vcore = mvc; |
5d5b99cd | 2017 | if (cpu != smp_processor_id()) |
66feed61 | 2018 | kvmppc_ipi_thread(cpu); |
371fefd6 | 2019 | } |
de56a948 | 2020 | |
5d5b99cd | 2021 | static void kvmppc_wait_for_nap(void) |
371fefd6 | 2022 | { |
5d5b99cd PM |
2023 | int cpu = smp_processor_id(); |
2024 | int i, loops; | |
45c940ba | 2025 | int n_threads = threads_per_vcore(); |
371fefd6 | 2026 | |
45c940ba PM |
2027 | if (n_threads <= 1) |
2028 | return; | |
5d5b99cd PM |
2029 | for (loops = 0; loops < 1000000; ++loops) { |
2030 | /* | |
2031 | * Check if all threads are finished. | |
b4deba5c | 2032 | * We set the vcore pointer when starting a thread |
5d5b99cd | 2033 | * and the thread clears it when finished, so we look |
b4deba5c | 2034 | * for any threads that still have a non-NULL vcore ptr. |
5d5b99cd | 2035 | */ |
45c940ba | 2036 | for (i = 1; i < n_threads; ++i) |
b4deba5c | 2037 | if (paca[cpu + i].kvm_hstate.kvm_vcore) |
5d5b99cd | 2038 | break; |
45c940ba | 2039 | if (i == n_threads) { |
5d5b99cd PM |
2040 | HMT_medium(); |
2041 | return; | |
371fefd6 | 2042 | } |
5d5b99cd | 2043 | HMT_low(); |
371fefd6 PM |
2044 | } |
2045 | HMT_medium(); | |
45c940ba | 2046 | for (i = 1; i < n_threads; ++i) |
b4deba5c | 2047 | if (paca[cpu + i].kvm_hstate.kvm_vcore) |
5d5b99cd | 2048 | pr_err("KVM: CPU %d seems to be stuck\n", cpu + i); |
371fefd6 PM |
2049 | } |
2050 | ||
2051 | /* | |
2052 | * Check that we are on thread 0 and that any other threads in | |
7b444c67 PM |
2053 | * this core are off-line. Then grab the threads so they can't |
2054 | * enter the kernel. | |
371fefd6 PM |
2055 | */ |
2056 | static int on_primary_thread(void) | |
2057 | { | |
2058 | int cpu = smp_processor_id(); | |
3102f784 | 2059 | int thr; |
371fefd6 | 2060 | |
3102f784 ME |
2061 | /* Are we on a primary subcore? */ |
2062 | if (cpu_thread_in_subcore(cpu)) | |
371fefd6 | 2063 | return 0; |
3102f784 ME |
2064 | |
2065 | thr = 0; | |
2066 | while (++thr < threads_per_subcore) | |
371fefd6 PM |
2067 | if (cpu_online(cpu + thr)) |
2068 | return 0; | |
7b444c67 PM |
2069 | |
2070 | /* Grab all hw threads so they can't go into the kernel */ | |
3102f784 | 2071 | for (thr = 1; thr < threads_per_subcore; ++thr) { |
7b444c67 PM |
2072 | if (kvmppc_grab_hwthread(cpu + thr)) { |
2073 | /* Couldn't grab one; let the others go */ | |
2074 | do { | |
2075 | kvmppc_release_hwthread(cpu + thr); | |
2076 | } while (--thr > 0); | |
2077 | return 0; | |
2078 | } | |
2079 | } | |
371fefd6 PM |
2080 | return 1; |
2081 | } | |
2082 | ||
ec257165 PM |
2083 | /* |
2084 | * A list of virtual cores for each physical CPU. | |
2085 | * These are vcores that could run but their runner VCPU tasks are | |
2086 | * (or may be) preempted. | |
2087 | */ | |
2088 | struct preempted_vcore_list { | |
2089 | struct list_head list; | |
2090 | spinlock_t lock; | |
2091 | }; | |
2092 | ||
2093 | static DEFINE_PER_CPU(struct preempted_vcore_list, preempted_vcores); | |
2094 | ||
2095 | static void init_vcore_lists(void) | |
2096 | { | |
2097 | int cpu; | |
2098 | ||
2099 | for_each_possible_cpu(cpu) { | |
2100 | struct preempted_vcore_list *lp = &per_cpu(preempted_vcores, cpu); | |
2101 | spin_lock_init(&lp->lock); | |
2102 | INIT_LIST_HEAD(&lp->list); | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | static void kvmppc_vcore_preempt(struct kvmppc_vcore *vc) | |
2107 | { | |
2108 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); | |
2109 | ||
2110 | vc->vcore_state = VCORE_PREEMPT; | |
2111 | vc->pcpu = smp_processor_id(); | |
45c940ba | 2112 | if (vc->num_threads < threads_per_vcore()) { |
ec257165 PM |
2113 | spin_lock(&lp->lock); |
2114 | list_add_tail(&vc->preempt_list, &lp->list); | |
2115 | spin_unlock(&lp->lock); | |
2116 | } | |
2117 | ||
2118 | /* Start accumulating stolen time */ | |
2119 | kvmppc_core_start_stolen(vc); | |
2120 | } | |
2121 | ||
2122 | static void kvmppc_vcore_end_preempt(struct kvmppc_vcore *vc) | |
2123 | { | |
402813fe | 2124 | struct preempted_vcore_list *lp; |
ec257165 PM |
2125 | |
2126 | kvmppc_core_end_stolen(vc); | |
2127 | if (!list_empty(&vc->preempt_list)) { | |
402813fe | 2128 | lp = &per_cpu(preempted_vcores, vc->pcpu); |
ec257165 PM |
2129 | spin_lock(&lp->lock); |
2130 | list_del_init(&vc->preempt_list); | |
2131 | spin_unlock(&lp->lock); | |
2132 | } | |
2133 | vc->vcore_state = VCORE_INACTIVE; | |
2134 | } | |
2135 | ||
b4deba5c PM |
2136 | /* |
2137 | * This stores information about the virtual cores currently | |
2138 | * assigned to a physical core. | |
2139 | */ | |
ec257165 | 2140 | struct core_info { |
b4deba5c PM |
2141 | int n_subcores; |
2142 | int max_subcore_threads; | |
ec257165 | 2143 | int total_threads; |
b4deba5c PM |
2144 | int subcore_threads[MAX_SUBCORES]; |
2145 | struct kvm *subcore_vm[MAX_SUBCORES]; | |
2146 | struct list_head vcs[MAX_SUBCORES]; | |
ec257165 PM |
2147 | }; |
2148 | ||
b4deba5c PM |
2149 | /* |
2150 | * This mapping means subcores 0 and 1 can use threads 0-3 and 4-7 | |
2151 | * respectively in 2-way micro-threading (split-core) mode. | |
2152 | */ | |
2153 | static int subcore_thread_map[MAX_SUBCORES] = { 0, 4, 2, 6 }; | |
2154 | ||
ec257165 PM |
2155 | static void init_core_info(struct core_info *cip, struct kvmppc_vcore *vc) |
2156 | { | |
b4deba5c PM |
2157 | int sub; |
2158 | ||
ec257165 | 2159 | memset(cip, 0, sizeof(*cip)); |
b4deba5c PM |
2160 | cip->n_subcores = 1; |
2161 | cip->max_subcore_threads = vc->num_threads; | |
ec257165 | 2162 | cip->total_threads = vc->num_threads; |
b4deba5c PM |
2163 | cip->subcore_threads[0] = vc->num_threads; |
2164 | cip->subcore_vm[0] = vc->kvm; | |
2165 | for (sub = 0; sub < MAX_SUBCORES; ++sub) | |
2166 | INIT_LIST_HEAD(&cip->vcs[sub]); | |
2167 | list_add_tail(&vc->preempt_list, &cip->vcs[0]); | |
2168 | } | |
2169 | ||
2170 | static bool subcore_config_ok(int n_subcores, int n_threads) | |
2171 | { | |
2172 | /* Can only dynamically split if unsplit to begin with */ | |
2173 | if (n_subcores > 1 && threads_per_subcore < MAX_SMT_THREADS) | |
2174 | return false; | |
2175 | if (n_subcores > MAX_SUBCORES) | |
2176 | return false; | |
2177 | if (n_subcores > 1) { | |
2178 | if (!(dynamic_mt_modes & 2)) | |
2179 | n_subcores = 4; | |
2180 | if (n_subcores > 2 && !(dynamic_mt_modes & 4)) | |
2181 | return false; | |
2182 | } | |
2183 | ||
2184 | return n_subcores * roundup_pow_of_two(n_threads) <= MAX_SMT_THREADS; | |
ec257165 PM |
2185 | } |
2186 | ||
2187 | static void init_master_vcore(struct kvmppc_vcore *vc) | |
2188 | { | |
2189 | vc->master_vcore = vc; | |
2190 | vc->entry_exit_map = 0; | |
2191 | vc->in_guest = 0; | |
2192 | vc->napping_threads = 0; | |
2193 | vc->conferring_threads = 0; | |
2194 | } | |
2195 | ||
b4deba5c PM |
2196 | static bool can_dynamic_split(struct kvmppc_vcore *vc, struct core_info *cip) |
2197 | { | |
2198 | int n_threads = vc->num_threads; | |
2199 | int sub; | |
2200 | ||
2201 | if (!cpu_has_feature(CPU_FTR_ARCH_207S)) | |
2202 | return false; | |
2203 | ||
2204 | if (n_threads < cip->max_subcore_threads) | |
2205 | n_threads = cip->max_subcore_threads; | |
b009031f | 2206 | if (!subcore_config_ok(cip->n_subcores + 1, n_threads)) |
b4deba5c | 2207 | return false; |
b009031f | 2208 | cip->max_subcore_threads = n_threads; |
b4deba5c PM |
2209 | |
2210 | sub = cip->n_subcores; | |
2211 | ++cip->n_subcores; | |
2212 | cip->total_threads += vc->num_threads; | |
2213 | cip->subcore_threads[sub] = vc->num_threads; | |
2214 | cip->subcore_vm[sub] = vc->kvm; | |
2215 | init_master_vcore(vc); | |
28d057c8 | 2216 | list_move_tail(&vc->preempt_list, &cip->vcs[sub]); |
b4deba5c PM |
2217 | |
2218 | return true; | |
2219 | } | |
2220 | ||
b4deba5c PM |
2221 | /* |
2222 | * Work out whether it is possible to piggyback the execution of | |
2223 | * vcore *pvc onto the execution of the other vcores described in *cip. | |
2224 | */ | |
2225 | static bool can_piggyback(struct kvmppc_vcore *pvc, struct core_info *cip, | |
2226 | int target_threads) | |
2227 | { | |
b4deba5c PM |
2228 | if (cip->total_threads + pvc->num_threads > target_threads) |
2229 | return false; | |
b4deba5c | 2230 | |
b009031f | 2231 | return can_dynamic_split(pvc, cip); |
b4deba5c PM |
2232 | } |
2233 | ||
d911f0be PM |
2234 | static void prepare_threads(struct kvmppc_vcore *vc) |
2235 | { | |
7b5f8272 SJS |
2236 | int i; |
2237 | struct kvm_vcpu *vcpu; | |
d911f0be | 2238 | |
7b5f8272 | 2239 | for_each_runnable_thread(i, vcpu, vc) { |
d911f0be PM |
2240 | if (signal_pending(vcpu->arch.run_task)) |
2241 | vcpu->arch.ret = -EINTR; | |
2242 | else if (vcpu->arch.vpa.update_pending || | |
2243 | vcpu->arch.slb_shadow.update_pending || | |
2244 | vcpu->arch.dtl.update_pending) | |
2245 | vcpu->arch.ret = RESUME_GUEST; | |
2246 | else | |
2247 | continue; | |
2248 | kvmppc_remove_runnable(vc, vcpu); | |
2249 | wake_up(&vcpu->arch.cpu_run); | |
2250 | } | |
2251 | } | |
2252 | ||
ec257165 PM |
2253 | static void collect_piggybacks(struct core_info *cip, int target_threads) |
2254 | { | |
2255 | struct preempted_vcore_list *lp = this_cpu_ptr(&preempted_vcores); | |
2256 | struct kvmppc_vcore *pvc, *vcnext; | |
2257 | ||
2258 | spin_lock(&lp->lock); | |
2259 | list_for_each_entry_safe(pvc, vcnext, &lp->list, preempt_list) { | |
2260 | if (!spin_trylock(&pvc->lock)) | |
2261 | continue; | |
2262 | prepare_threads(pvc); | |
2263 | if (!pvc->n_runnable) { | |
2264 | list_del_init(&pvc->preempt_list); | |
2265 | if (pvc->runner == NULL) { | |
2266 | pvc->vcore_state = VCORE_INACTIVE; | |
2267 | kvmppc_core_end_stolen(pvc); | |
2268 | } | |
2269 | spin_unlock(&pvc->lock); | |
2270 | continue; | |
2271 | } | |
2272 | if (!can_piggyback(pvc, cip, target_threads)) { | |
2273 | spin_unlock(&pvc->lock); | |
2274 | continue; | |
2275 | } | |
2276 | kvmppc_core_end_stolen(pvc); | |
2277 | pvc->vcore_state = VCORE_PIGGYBACK; | |
2278 | if (cip->total_threads >= target_threads) | |
2279 | break; | |
2280 | } | |
2281 | spin_unlock(&lp->lock); | |
2282 | } | |
2283 | ||
2284 | static void post_guest_process(struct kvmppc_vcore *vc, bool is_master) | |
25fedfca | 2285 | { |
7b5f8272 | 2286 | int still_running = 0, i; |
25fedfca PM |
2287 | u64 now; |
2288 | long ret; | |
7b5f8272 | 2289 | struct kvm_vcpu *vcpu; |
25fedfca | 2290 | |
ec257165 | 2291 | spin_lock(&vc->lock); |
25fedfca | 2292 | now = get_tb(); |
7b5f8272 | 2293 | for_each_runnable_thread(i, vcpu, vc) { |
25fedfca PM |
2294 | /* cancel pending dec exception if dec is positive */ |
2295 | if (now < vcpu->arch.dec_expires && | |
2296 | kvmppc_core_pending_dec(vcpu)) | |
2297 | kvmppc_core_dequeue_dec(vcpu); | |
2298 | ||
2299 | trace_kvm_guest_exit(vcpu); | |
2300 | ||
2301 | ret = RESUME_GUEST; | |
2302 | if (vcpu->arch.trap) | |
2303 | ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu, | |
2304 | vcpu->arch.run_task); | |
2305 | ||
2306 | vcpu->arch.ret = ret; | |
2307 | vcpu->arch.trap = 0; | |
2308 | ||
ec257165 PM |
2309 | if (is_kvmppc_resume_guest(vcpu->arch.ret)) { |
2310 | if (vcpu->arch.pending_exceptions) | |
2311 | kvmppc_core_prepare_to_enter(vcpu); | |
2312 | if (vcpu->arch.ceded) | |
25fedfca | 2313 | kvmppc_set_timer(vcpu); |
ec257165 PM |
2314 | else |
2315 | ++still_running; | |
2316 | } else { | |
25fedfca PM |
2317 | kvmppc_remove_runnable(vc, vcpu); |
2318 | wake_up(&vcpu->arch.cpu_run); | |
2319 | } | |
2320 | } | |
ec257165 PM |
2321 | list_del_init(&vc->preempt_list); |
2322 | if (!is_master) { | |
563a1e93 | 2323 | if (still_running > 0) { |
ec257165 | 2324 | kvmppc_vcore_preempt(vc); |
563a1e93 PM |
2325 | } else if (vc->runner) { |
2326 | vc->vcore_state = VCORE_PREEMPT; | |
2327 | kvmppc_core_start_stolen(vc); | |
2328 | } else { | |
2329 | vc->vcore_state = VCORE_INACTIVE; | |
2330 | } | |
ec257165 PM |
2331 | if (vc->n_runnable > 0 && vc->runner == NULL) { |
2332 | /* make sure there's a candidate runner awake */ | |
7b5f8272 SJS |
2333 | i = -1; |
2334 | vcpu = next_runnable_thread(vc, &i); | |
ec257165 PM |
2335 | wake_up(&vcpu->arch.cpu_run); |
2336 | } | |
2337 | } | |
2338 | spin_unlock(&vc->lock); | |
25fedfca PM |
2339 | } |
2340 | ||
b8e6a87c SW |
2341 | /* |
2342 | * Clear core from the list of active host cores as we are about to | |
2343 | * enter the guest. Only do this if it is the primary thread of the | |
2344 | * core (not if a subcore) that is entering the guest. | |
2345 | */ | |
3f7cd919 | 2346 | static inline int kvmppc_clear_host_core(unsigned int cpu) |
b8e6a87c SW |
2347 | { |
2348 | int core; | |
2349 | ||
2350 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) | |
3f7cd919 | 2351 | return 0; |
b8e6a87c SW |
2352 | /* |
2353 | * Memory barrier can be omitted here as we will do a smp_wmb() | |
2354 | * later in kvmppc_start_thread and we need ensure that state is | |
2355 | * visible to other CPUs only after we enter guest. | |
2356 | */ | |
2357 | core = cpu >> threads_shift; | |
2358 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 0; | |
3f7cd919 | 2359 | return 0; |
b8e6a87c SW |
2360 | } |
2361 | ||
2362 | /* | |
2363 | * Advertise this core as an active host core since we exited the guest | |
2364 | * Only need to do this if it is the primary thread of the core that is | |
2365 | * exiting. | |
2366 | */ | |
3f7cd919 | 2367 | static inline int kvmppc_set_host_core(unsigned int cpu) |
b8e6a87c SW |
2368 | { |
2369 | int core; | |
2370 | ||
2371 | if (!kvmppc_host_rm_ops_hv || cpu_thread_in_core(cpu)) | |
3f7cd919 | 2372 | return 0; |
b8e6a87c SW |
2373 | |
2374 | /* | |
2375 | * Memory barrier can be omitted here because we do a spin_unlock | |
2376 | * immediately after this which provides the memory barrier. | |
2377 | */ | |
2378 | core = cpu >> threads_shift; | |
2379 | kvmppc_host_rm_ops_hv->rm_core[core].rm_state.in_host = 1; | |
3f7cd919 | 2380 | return 0; |
b8e6a87c SW |
2381 | } |
2382 | ||
371fefd6 PM |
2383 | /* |
2384 | * Run a set of guest threads on a physical core. | |
2385 | * Called with vc->lock held. | |
2386 | */ | |
66feed61 | 2387 | static noinline void kvmppc_run_core(struct kvmppc_vcore *vc) |
371fefd6 | 2388 | { |
7b5f8272 | 2389 | struct kvm_vcpu *vcpu; |
d911f0be | 2390 | int i; |
2c9097e4 | 2391 | int srcu_idx; |
ec257165 PM |
2392 | struct core_info core_info; |
2393 | struct kvmppc_vcore *pvc, *vcnext; | |
b4deba5c PM |
2394 | struct kvm_split_mode split_info, *sip; |
2395 | int split, subcore_size, active; | |
2396 | int sub; | |
2397 | bool thr0_done; | |
2398 | unsigned long cmd_bit, stat_bit; | |
ec257165 PM |
2399 | int pcpu, thr; |
2400 | int target_threads; | |
45c940ba | 2401 | int controlled_threads; |
371fefd6 | 2402 | |
d911f0be PM |
2403 | /* |
2404 | * Remove from the list any threads that have a signal pending | |
2405 | * or need a VPA update done | |
2406 | */ | |
2407 | prepare_threads(vc); | |
2408 | ||
2409 | /* if the runner is no longer runnable, let the caller pick a new one */ | |
2410 | if (vc->runner->arch.state != KVMPPC_VCPU_RUNNABLE) | |
2411 | return; | |
081f323b PM |
2412 | |
2413 | /* | |
d911f0be | 2414 | * Initialize *vc. |
081f323b | 2415 | */ |
ec257165 | 2416 | init_master_vcore(vc); |
2711e248 | 2417 | vc->preempt_tb = TB_NIL; |
081f323b | 2418 | |
45c940ba PM |
2419 | /* |
2420 | * Number of threads that we will be controlling: the same as | |
2421 | * the number of threads per subcore, except on POWER9, | |
2422 | * where it's 1 because the threads are (mostly) independent. | |
2423 | */ | |
2424 | controlled_threads = threads_per_vcore(); | |
2425 | ||
7b444c67 | 2426 | /* |
3102f784 ME |
2427 | * Make sure we are running on primary threads, and that secondary |
2428 | * threads are offline. Also check if the number of threads in this | |
2429 | * guest are greater than the current system threads per guest. | |
7b444c67 | 2430 | */ |
45c940ba | 2431 | if ((controlled_threads > 1) && |
3102f784 | 2432 | ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) { |
7b5f8272 | 2433 | for_each_runnable_thread(i, vcpu, vc) { |
7b444c67 | 2434 | vcpu->arch.ret = -EBUSY; |
25fedfca PM |
2435 | kvmppc_remove_runnable(vc, vcpu); |
2436 | wake_up(&vcpu->arch.cpu_run); | |
2437 | } | |
7b444c67 PM |
2438 | goto out; |
2439 | } | |
2440 | ||
ec257165 PM |
2441 | /* |
2442 | * See if we could run any other vcores on the physical core | |
2443 | * along with this one. | |
2444 | */ | |
2445 | init_core_info(&core_info, vc); | |
2446 | pcpu = smp_processor_id(); | |
45c940ba | 2447 | target_threads = controlled_threads; |
ec257165 PM |
2448 | if (target_smt_mode && target_smt_mode < target_threads) |
2449 | target_threads = target_smt_mode; | |
2450 | if (vc->num_threads < target_threads) | |
2451 | collect_piggybacks(&core_info, target_threads); | |
3102f784 | 2452 | |
b4deba5c PM |
2453 | /* Decide on micro-threading (split-core) mode */ |
2454 | subcore_size = threads_per_subcore; | |
2455 | cmd_bit = stat_bit = 0; | |
2456 | split = core_info.n_subcores; | |
2457 | sip = NULL; | |
2458 | if (split > 1) { | |
2459 | /* threads_per_subcore must be MAX_SMT_THREADS (8) here */ | |
2460 | if (split == 2 && (dynamic_mt_modes & 2)) { | |
2461 | cmd_bit = HID0_POWER8_1TO2LPAR; | |
2462 | stat_bit = HID0_POWER8_2LPARMODE; | |
2463 | } else { | |
2464 | split = 4; | |
2465 | cmd_bit = HID0_POWER8_1TO4LPAR; | |
2466 | stat_bit = HID0_POWER8_4LPARMODE; | |
2467 | } | |
2468 | subcore_size = MAX_SMT_THREADS / split; | |
2469 | sip = &split_info; | |
2470 | memset(&split_info, 0, sizeof(split_info)); | |
2471 | split_info.rpr = mfspr(SPRN_RPR); | |
2472 | split_info.pmmar = mfspr(SPRN_PMMAR); | |
2473 | split_info.ldbar = mfspr(SPRN_LDBAR); | |
2474 | split_info.subcore_size = subcore_size; | |
2475 | for (sub = 0; sub < core_info.n_subcores; ++sub) | |
2476 | split_info.master_vcs[sub] = | |
2477 | list_first_entry(&core_info.vcs[sub], | |
2478 | struct kvmppc_vcore, preempt_list); | |
2479 | /* order writes to split_info before kvm_split_mode pointer */ | |
2480 | smp_wmb(); | |
2481 | } | |
2482 | pcpu = smp_processor_id(); | |
45c940ba | 2483 | for (thr = 0; thr < controlled_threads; ++thr) |
b4deba5c PM |
2484 | paca[pcpu + thr].kvm_hstate.kvm_split_mode = sip; |
2485 | ||
2486 | /* Initiate micro-threading (split-core) if required */ | |
2487 | if (cmd_bit) { | |
2488 | unsigned long hid0 = mfspr(SPRN_HID0); | |
2489 | ||
2490 | hid0 |= cmd_bit | HID0_POWER8_DYNLPARDIS; | |
2491 | mb(); | |
2492 | mtspr(SPRN_HID0, hid0); | |
2493 | isync(); | |
2494 | for (;;) { | |
2495 | hid0 = mfspr(SPRN_HID0); | |
2496 | if (hid0 & stat_bit) | |
2497 | break; | |
2498 | cpu_relax(); | |
ec257165 | 2499 | } |
2e25aa5f | 2500 | } |
3102f784 | 2501 | |
b8e6a87c SW |
2502 | kvmppc_clear_host_core(pcpu); |
2503 | ||
b4deba5c PM |
2504 | /* Start all the threads */ |
2505 | active = 0; | |
2506 | for (sub = 0; sub < core_info.n_subcores; ++sub) { | |
2507 | thr = subcore_thread_map[sub]; | |
2508 | thr0_done = false; | |
2509 | active |= 1 << thr; | |
2510 | list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) { | |
2511 | pvc->pcpu = pcpu + thr; | |
7b5f8272 | 2512 | for_each_runnable_thread(i, vcpu, pvc) { |
b4deba5c PM |
2513 | kvmppc_start_thread(vcpu, pvc); |
2514 | kvmppc_create_dtl_entry(vcpu, pvc); | |
2515 | trace_kvm_guest_enter(vcpu); | |
2516 | if (!vcpu->arch.ptid) | |
2517 | thr0_done = true; | |
2518 | active |= 1 << (thr + vcpu->arch.ptid); | |
2519 | } | |
2520 | /* | |
2521 | * We need to start the first thread of each subcore | |
2522 | * even if it doesn't have a vcpu. | |
2523 | */ | |
2524 | if (pvc->master_vcore == pvc && !thr0_done) | |
2525 | kvmppc_start_thread(NULL, pvc); | |
2526 | thr += pvc->num_threads; | |
2527 | } | |
2e25aa5f | 2528 | } |
371fefd6 | 2529 | |
7f235328 GS |
2530 | /* |
2531 | * Ensure that split_info.do_nap is set after setting | |
2532 | * the vcore pointer in the PACA of the secondaries. | |
2533 | */ | |
2534 | smp_mb(); | |
2535 | if (cmd_bit) | |
2536 | split_info.do_nap = 1; /* ask secondaries to nap when done */ | |
2537 | ||
b4deba5c PM |
2538 | /* |
2539 | * When doing micro-threading, poke the inactive threads as well. | |
2540 | * This gets them to the nap instruction after kvm_do_nap, | |
2541 | * which reduces the time taken to unsplit later. | |
2542 | */ | |
2543 | if (split > 1) | |
2544 | for (thr = 1; thr < threads_per_subcore; ++thr) | |
2545 | if (!(active & (1 << thr))) | |
2546 | kvmppc_ipi_thread(pcpu + thr); | |
e0b7ec05 | 2547 | |
2f12f034 | 2548 | vc->vcore_state = VCORE_RUNNING; |
19ccb76a | 2549 | preempt_disable(); |
3c78f78a SW |
2550 | |
2551 | trace_kvmppc_run_core(vc, 0); | |
2552 | ||
b4deba5c PM |
2553 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
2554 | list_for_each_entry(pvc, &core_info.vcs[sub], preempt_list) | |
2555 | spin_unlock(&pvc->lock); | |
de56a948 | 2556 | |
6edaa530 | 2557 | guest_enter(); |
2c9097e4 | 2558 | |
e0b7ec05 | 2559 | srcu_idx = srcu_read_lock(&vc->kvm->srcu); |
2c9097e4 | 2560 | |
e0b7ec05 | 2561 | __kvmppc_vcore_entry(); |
de56a948 | 2562 | |
ec257165 PM |
2563 | srcu_read_unlock(&vc->kvm->srcu, srcu_idx); |
2564 | ||
2565 | spin_lock(&vc->lock); | |
371fefd6 | 2566 | /* prevent other vcpu threads from doing kvmppc_start_thread() now */ |
19ccb76a | 2567 | vc->vcore_state = VCORE_EXITING; |
371fefd6 | 2568 | |
19ccb76a | 2569 | /* wait for secondary threads to finish writing their state to memory */ |
5d5b99cd | 2570 | kvmppc_wait_for_nap(); |
b4deba5c PM |
2571 | |
2572 | /* Return to whole-core mode if we split the core earlier */ | |
2573 | if (split > 1) { | |
2574 | unsigned long hid0 = mfspr(SPRN_HID0); | |
2575 | unsigned long loops = 0; | |
2576 | ||
2577 | hid0 &= ~HID0_POWER8_DYNLPARDIS; | |
2578 | stat_bit = HID0_POWER8_2LPARMODE | HID0_POWER8_4LPARMODE; | |
2579 | mb(); | |
2580 | mtspr(SPRN_HID0, hid0); | |
2581 | isync(); | |
2582 | for (;;) { | |
2583 | hid0 = mfspr(SPRN_HID0); | |
2584 | if (!(hid0 & stat_bit)) | |
2585 | break; | |
2586 | cpu_relax(); | |
2587 | ++loops; | |
2588 | } | |
2589 | split_info.do_nap = 0; | |
2590 | } | |
2591 | ||
2592 | /* Let secondaries go back to the offline loop */ | |
45c940ba | 2593 | for (i = 0; i < controlled_threads; ++i) { |
b4deba5c PM |
2594 | kvmppc_release_hwthread(pcpu + i); |
2595 | if (sip && sip->napped[i]) | |
2596 | kvmppc_ipi_thread(pcpu + i); | |
a29ebeaf | 2597 | cpumask_clear_cpu(pcpu + i, &vc->kvm->arch.cpu_in_guest); |
b4deba5c PM |
2598 | } |
2599 | ||
b8e6a87c SW |
2600 | kvmppc_set_host_core(pcpu); |
2601 | ||
371fefd6 | 2602 | spin_unlock(&vc->lock); |
2c9097e4 | 2603 | |
371fefd6 PM |
2604 | /* make sure updates to secondary vcpu structs are visible now */ |
2605 | smp_mb(); | |
6edaa530 | 2606 | guest_exit(); |
de56a948 | 2607 | |
b4deba5c PM |
2608 | for (sub = 0; sub < core_info.n_subcores; ++sub) |
2609 | list_for_each_entry_safe(pvc, vcnext, &core_info.vcs[sub], | |
2610 | preempt_list) | |
2611 | post_guest_process(pvc, pvc == vc); | |
de56a948 | 2612 | |
913d3ff9 | 2613 | spin_lock(&vc->lock); |
ec257165 | 2614 | preempt_enable(); |
de56a948 PM |
2615 | |
2616 | out: | |
19ccb76a | 2617 | vc->vcore_state = VCORE_INACTIVE; |
3c78f78a | 2618 | trace_kvmppc_run_core(vc, 1); |
371fefd6 PM |
2619 | } |
2620 | ||
19ccb76a PM |
2621 | /* |
2622 | * Wait for some other vcpu thread to execute us, and | |
2623 | * wake us up when we need to handle something in the host. | |
2624 | */ | |
ec257165 PM |
2625 | static void kvmppc_wait_for_exec(struct kvmppc_vcore *vc, |
2626 | struct kvm_vcpu *vcpu, int wait_state) | |
371fefd6 | 2627 | { |
371fefd6 PM |
2628 | DEFINE_WAIT(wait); |
2629 | ||
19ccb76a | 2630 | prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state); |
ec257165 PM |
2631 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
2632 | spin_unlock(&vc->lock); | |
19ccb76a | 2633 | schedule(); |
ec257165 PM |
2634 | spin_lock(&vc->lock); |
2635 | } | |
19ccb76a PM |
2636 | finish_wait(&vcpu->arch.cpu_run, &wait); |
2637 | } | |
2638 | ||
0cda69dd SJS |
2639 | static void grow_halt_poll_ns(struct kvmppc_vcore *vc) |
2640 | { | |
2641 | /* 10us base */ | |
2642 | if (vc->halt_poll_ns == 0 && halt_poll_ns_grow) | |
2643 | vc->halt_poll_ns = 10000; | |
2644 | else | |
2645 | vc->halt_poll_ns *= halt_poll_ns_grow; | |
0cda69dd SJS |
2646 | } |
2647 | ||
2648 | static void shrink_halt_poll_ns(struct kvmppc_vcore *vc) | |
2649 | { | |
2650 | if (halt_poll_ns_shrink == 0) | |
2651 | vc->halt_poll_ns = 0; | |
2652 | else | |
2653 | vc->halt_poll_ns /= halt_poll_ns_shrink; | |
2654 | } | |
2655 | ||
908a0935 SJS |
2656 | /* |
2657 | * Check to see if any of the runnable vcpus on the vcore have pending | |
0cda69dd SJS |
2658 | * exceptions or are no longer ceded |
2659 | */ | |
2660 | static int kvmppc_vcore_check_block(struct kvmppc_vcore *vc) | |
2661 | { | |
2662 | struct kvm_vcpu *vcpu; | |
2663 | int i; | |
2664 | ||
2665 | for_each_runnable_thread(i, vcpu, vc) { | |
8464c884 PM |
2666 | if (vcpu->arch.pending_exceptions || !vcpu->arch.ceded || |
2667 | vcpu->arch.prodded) | |
0cda69dd SJS |
2668 | return 1; |
2669 | } | |
2670 | ||
2671 | return 0; | |
2672 | } | |
2673 | ||
19ccb76a PM |
2674 | /* |
2675 | * All the vcpus in this vcore are idle, so wait for a decrementer | |
2676 | * or external interrupt to one of the vcpus. vc->lock is held. | |
2677 | */ | |
2678 | static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc) | |
2679 | { | |
2a27f514 | 2680 | ktime_t cur, start_poll, start_wait; |
0cda69dd | 2681 | int do_sleep = 1; |
0cda69dd | 2682 | u64 block_ns; |
8577370f | 2683 | DECLARE_SWAITQUEUE(wait); |
1bc5d59c | 2684 | |
0cda69dd | 2685 | /* Poll for pending exceptions and ceded state */ |
2a27f514 | 2686 | cur = start_poll = ktime_get(); |
0cda69dd | 2687 | if (vc->halt_poll_ns) { |
2a27f514 SJS |
2688 | ktime_t stop = ktime_add_ns(start_poll, vc->halt_poll_ns); |
2689 | ++vc->runner->stat.halt_attempted_poll; | |
1bc5d59c | 2690 | |
0cda69dd SJS |
2691 | vc->vcore_state = VCORE_POLLING; |
2692 | spin_unlock(&vc->lock); | |
2693 | ||
2694 | do { | |
2695 | if (kvmppc_vcore_check_block(vc)) { | |
2696 | do_sleep = 0; | |
2697 | break; | |
2698 | } | |
2699 | cur = ktime_get(); | |
2700 | } while (single_task_running() && ktime_before(cur, stop)); | |
2701 | ||
2702 | spin_lock(&vc->lock); | |
2703 | vc->vcore_state = VCORE_INACTIVE; | |
2704 | ||
2a27f514 SJS |
2705 | if (!do_sleep) { |
2706 | ++vc->runner->stat.halt_successful_poll; | |
0cda69dd | 2707 | goto out; |
2a27f514 | 2708 | } |
1bc5d59c SW |
2709 | } |
2710 | ||
0cda69dd SJS |
2711 | prepare_to_swait(&vc->wq, &wait, TASK_INTERRUPTIBLE); |
2712 | ||
2713 | if (kvmppc_vcore_check_block(vc)) { | |
8577370f | 2714 | finish_swait(&vc->wq, &wait); |
0cda69dd | 2715 | do_sleep = 0; |
2a27f514 SJS |
2716 | /* If we polled, count this as a successful poll */ |
2717 | if (vc->halt_poll_ns) | |
2718 | ++vc->runner->stat.halt_successful_poll; | |
0cda69dd | 2719 | goto out; |
1bc5d59c SW |
2720 | } |
2721 | ||
2a27f514 SJS |
2722 | start_wait = ktime_get(); |
2723 | ||
19ccb76a | 2724 | vc->vcore_state = VCORE_SLEEPING; |
3c78f78a | 2725 | trace_kvmppc_vcore_blocked(vc, 0); |
19ccb76a | 2726 | spin_unlock(&vc->lock); |
913d3ff9 | 2727 | schedule(); |
8577370f | 2728 | finish_swait(&vc->wq, &wait); |
19ccb76a PM |
2729 | spin_lock(&vc->lock); |
2730 | vc->vcore_state = VCORE_INACTIVE; | |
3c78f78a | 2731 | trace_kvmppc_vcore_blocked(vc, 1); |
2a27f514 | 2732 | ++vc->runner->stat.halt_successful_wait; |
0cda69dd SJS |
2733 | |
2734 | cur = ktime_get(); | |
2735 | ||
2736 | out: | |
2a27f514 SJS |
2737 | block_ns = ktime_to_ns(cur) - ktime_to_ns(start_poll); |
2738 | ||
2739 | /* Attribute wait time */ | |
2740 | if (do_sleep) { | |
2741 | vc->runner->stat.halt_wait_ns += | |
2742 | ktime_to_ns(cur) - ktime_to_ns(start_wait); | |
2743 | /* Attribute failed poll time */ | |
2744 | if (vc->halt_poll_ns) | |
2745 | vc->runner->stat.halt_poll_fail_ns += | |
2746 | ktime_to_ns(start_wait) - | |
2747 | ktime_to_ns(start_poll); | |
2748 | } else { | |
2749 | /* Attribute successful poll time */ | |
2750 | if (vc->halt_poll_ns) | |
2751 | vc->runner->stat.halt_poll_success_ns += | |
2752 | ktime_to_ns(cur) - | |
2753 | ktime_to_ns(start_poll); | |
2754 | } | |
0cda69dd SJS |
2755 | |
2756 | /* Adjust poll time */ | |
307d93e4 | 2757 | if (halt_poll_ns) { |
0cda69dd SJS |
2758 | if (block_ns <= vc->halt_poll_ns) |
2759 | ; | |
2760 | /* We slept and blocked for longer than the max halt time */ | |
307d93e4 | 2761 | else if (vc->halt_poll_ns && block_ns > halt_poll_ns) |
0cda69dd SJS |
2762 | shrink_halt_poll_ns(vc); |
2763 | /* We slept and our poll time is too small */ | |
307d93e4 SJS |
2764 | else if (vc->halt_poll_ns < halt_poll_ns && |
2765 | block_ns < halt_poll_ns) | |
0cda69dd | 2766 | grow_halt_poll_ns(vc); |
e03f3921 SJS |
2767 | if (vc->halt_poll_ns > halt_poll_ns) |
2768 | vc->halt_poll_ns = halt_poll_ns; | |
0cda69dd SJS |
2769 | } else |
2770 | vc->halt_poll_ns = 0; | |
2771 | ||
2772 | trace_kvmppc_vcore_wakeup(do_sleep, block_ns); | |
19ccb76a | 2773 | } |
371fefd6 | 2774 | |
19ccb76a PM |
2775 | static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) |
2776 | { | |
7b5f8272 | 2777 | int n_ceded, i; |
19ccb76a | 2778 | struct kvmppc_vcore *vc; |
7b5f8272 | 2779 | struct kvm_vcpu *v; |
9e368f29 | 2780 | |
3c78f78a SW |
2781 | trace_kvmppc_run_vcpu_enter(vcpu); |
2782 | ||
371fefd6 PM |
2783 | kvm_run->exit_reason = 0; |
2784 | vcpu->arch.ret = RESUME_GUEST; | |
2785 | vcpu->arch.trap = 0; | |
2f12f034 | 2786 | kvmppc_update_vpas(vcpu); |
371fefd6 | 2787 | |
371fefd6 PM |
2788 | /* |
2789 | * Synchronize with other threads in this virtual core | |
2790 | */ | |
2791 | vc = vcpu->arch.vcore; | |
2792 | spin_lock(&vc->lock); | |
19ccb76a | 2793 | vcpu->arch.ceded = 0; |
371fefd6 PM |
2794 | vcpu->arch.run_task = current; |
2795 | vcpu->arch.kvm_run = kvm_run; | |
c7b67670 | 2796 | vcpu->arch.stolen_logged = vcore_stolen_time(vc, mftb()); |
19ccb76a | 2797 | vcpu->arch.state = KVMPPC_VCPU_RUNNABLE; |
c7b67670 | 2798 | vcpu->arch.busy_preempt = TB_NIL; |
7b5f8272 | 2799 | WRITE_ONCE(vc->runnable_threads[vcpu->arch.ptid], vcpu); |
371fefd6 PM |
2800 | ++vc->n_runnable; |
2801 | ||
19ccb76a PM |
2802 | /* |
2803 | * This happens the first time this is called for a vcpu. | |
2804 | * If the vcore is already running, we may be able to start | |
2805 | * this thread straight away and have it join in. | |
2806 | */ | |
8455d79e | 2807 | if (!signal_pending(current)) { |
ec257165 PM |
2808 | if (vc->vcore_state == VCORE_PIGGYBACK) { |
2809 | struct kvmppc_vcore *mvc = vc->master_vcore; | |
2810 | if (spin_trylock(&mvc->lock)) { | |
2811 | if (mvc->vcore_state == VCORE_RUNNING && | |
2812 | !VCORE_IS_EXITING(mvc)) { | |
2813 | kvmppc_create_dtl_entry(vcpu, vc); | |
b4deba5c | 2814 | kvmppc_start_thread(vcpu, vc); |
ec257165 PM |
2815 | trace_kvm_guest_enter(vcpu); |
2816 | } | |
2817 | spin_unlock(&mvc->lock); | |
2818 | } | |
2819 | } else if (vc->vcore_state == VCORE_RUNNING && | |
2820 | !VCORE_IS_EXITING(vc)) { | |
2f12f034 | 2821 | kvmppc_create_dtl_entry(vcpu, vc); |
b4deba5c | 2822 | kvmppc_start_thread(vcpu, vc); |
3c78f78a | 2823 | trace_kvm_guest_enter(vcpu); |
8455d79e | 2824 | } else if (vc->vcore_state == VCORE_SLEEPING) { |
8577370f | 2825 | swake_up(&vc->wq); |
371fefd6 PM |
2826 | } |
2827 | ||
8455d79e | 2828 | } |
371fefd6 | 2829 | |
19ccb76a PM |
2830 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2831 | !signal_pending(current)) { | |
ec257165 PM |
2832 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
2833 | kvmppc_vcore_end_preempt(vc); | |
2834 | ||
8455d79e | 2835 | if (vc->vcore_state != VCORE_INACTIVE) { |
ec257165 | 2836 | kvmppc_wait_for_exec(vc, vcpu, TASK_INTERRUPTIBLE); |
19ccb76a PM |
2837 | continue; |
2838 | } | |
7b5f8272 | 2839 | for_each_runnable_thread(i, v, vc) { |
7e28e60e | 2840 | kvmppc_core_prepare_to_enter(v); |
19ccb76a PM |
2841 | if (signal_pending(v->arch.run_task)) { |
2842 | kvmppc_remove_runnable(vc, v); | |
2843 | v->stat.signal_exits++; | |
2844 | v->arch.kvm_run->exit_reason = KVM_EXIT_INTR; | |
2845 | v->arch.ret = -EINTR; | |
2846 | wake_up(&v->arch.cpu_run); | |
2847 | } | |
2848 | } | |
8455d79e PM |
2849 | if (!vc->n_runnable || vcpu->arch.state != KVMPPC_VCPU_RUNNABLE) |
2850 | break; | |
8455d79e | 2851 | n_ceded = 0; |
7b5f8272 | 2852 | for_each_runnable_thread(i, v, vc) { |
8464c884 | 2853 | if (!v->arch.pending_exceptions && !v->arch.prodded) |
8455d79e | 2854 | n_ceded += v->arch.ceded; |
4619ac88 PM |
2855 | else |
2856 | v->arch.ceded = 0; | |
2857 | } | |
25fedfca PM |
2858 | vc->runner = vcpu; |
2859 | if (n_ceded == vc->n_runnable) { | |
8455d79e | 2860 | kvmppc_vcore_blocked(vc); |
c56dadf3 | 2861 | } else if (need_resched()) { |
ec257165 | 2862 | kvmppc_vcore_preempt(vc); |
25fedfca PM |
2863 | /* Let something else run */ |
2864 | cond_resched_lock(&vc->lock); | |
ec257165 PM |
2865 | if (vc->vcore_state == VCORE_PREEMPT) |
2866 | kvmppc_vcore_end_preempt(vc); | |
25fedfca | 2867 | } else { |
8455d79e | 2868 | kvmppc_run_core(vc); |
25fedfca | 2869 | } |
0456ec4f | 2870 | vc->runner = NULL; |
19ccb76a | 2871 | } |
371fefd6 | 2872 | |
8455d79e PM |
2873 | while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE && |
2874 | (vc->vcore_state == VCORE_RUNNING || | |
5fc3e64f PM |
2875 | vc->vcore_state == VCORE_EXITING || |
2876 | vc->vcore_state == VCORE_PIGGYBACK)) | |
ec257165 | 2877 | kvmppc_wait_for_exec(vc, vcpu, TASK_UNINTERRUPTIBLE); |
8455d79e | 2878 | |
5fc3e64f PM |
2879 | if (vc->vcore_state == VCORE_PREEMPT && vc->runner == NULL) |
2880 | kvmppc_vcore_end_preempt(vc); | |
2881 | ||
8455d79e PM |
2882 | if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) { |
2883 | kvmppc_remove_runnable(vc, vcpu); | |
2884 | vcpu->stat.signal_exits++; | |
2885 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
2886 | vcpu->arch.ret = -EINTR; | |
2887 | } | |
2888 | ||
2889 | if (vc->n_runnable && vc->vcore_state == VCORE_INACTIVE) { | |
2890 | /* Wake up some vcpu to run the core */ | |
7b5f8272 SJS |
2891 | i = -1; |
2892 | v = next_runnable_thread(vc, &i); | |
8455d79e | 2893 | wake_up(&v->arch.cpu_run); |
371fefd6 PM |
2894 | } |
2895 | ||
3c78f78a | 2896 | trace_kvmppc_run_vcpu_exit(vcpu, kvm_run); |
371fefd6 | 2897 | spin_unlock(&vc->lock); |
371fefd6 | 2898 | return vcpu->arch.ret; |
de56a948 PM |
2899 | } |
2900 | ||
3a167bea | 2901 | static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu) |
a8606e20 PM |
2902 | { |
2903 | int r; | |
913d3ff9 | 2904 | int srcu_idx; |
a8606e20 | 2905 | |
af8f38b3 AG |
2906 | if (!vcpu->arch.sane) { |
2907 | run->exit_reason = KVM_EXIT_INTERNAL_ERROR; | |
2908 | return -EINVAL; | |
2909 | } | |
2910 | ||
25051b5a SW |
2911 | kvmppc_core_prepare_to_enter(vcpu); |
2912 | ||
19ccb76a PM |
2913 | /* No need to go into the guest when all we'll do is come back out */ |
2914 | if (signal_pending(current)) { | |
2915 | run->exit_reason = KVM_EXIT_INTR; | |
2916 | return -EINTR; | |
2917 | } | |
2918 | ||
32fad281 | 2919 | atomic_inc(&vcpu->kvm->arch.vcpus_running); |
31037eca | 2920 | /* Order vcpus_running vs. hpte_setup_done, see kvmppc_alloc_reset_hpt */ |
32fad281 PM |
2921 | smp_mb(); |
2922 | ||
c17b98cf | 2923 | /* On the first time here, set up HTAB and VRMA */ |
8cf4ecc0 | 2924 | if (!kvm_is_radix(vcpu->kvm) && !vcpu->kvm->arch.hpte_setup_done) { |
32fad281 | 2925 | r = kvmppc_hv_setup_htab_rma(vcpu); |
c77162de | 2926 | if (r) |
32fad281 | 2927 | goto out; |
c77162de | 2928 | } |
19ccb76a | 2929 | |
579e633e AB |
2930 | flush_all_to_thread(current); |
2931 | ||
19ccb76a | 2932 | vcpu->arch.wqp = &vcpu->arch.vcore->wq; |
342d3db7 | 2933 | vcpu->arch.pgdir = current->mm->pgd; |
c7b67670 | 2934 | vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST; |
19ccb76a | 2935 | |
a8606e20 PM |
2936 | do { |
2937 | r = kvmppc_run_vcpu(run, vcpu); | |
2938 | ||
2939 | if (run->exit_reason == KVM_EXIT_PAPR_HCALL && | |
2940 | !(vcpu->arch.shregs.msr & MSR_PR)) { | |
3c78f78a | 2941 | trace_kvm_hcall_enter(vcpu); |
a8606e20 | 2942 | r = kvmppc_pseries_do_hcall(vcpu); |
3c78f78a | 2943 | trace_kvm_hcall_exit(vcpu, r); |
7e28e60e | 2944 | kvmppc_core_prepare_to_enter(vcpu); |
913d3ff9 PM |
2945 | } else if (r == RESUME_PAGE_FAULT) { |
2946 | srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); | |
2947 | r = kvmppc_book3s_hv_page_fault(run, vcpu, | |
2948 | vcpu->arch.fault_dar, vcpu->arch.fault_dsisr); | |
2949 | srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); | |
f7af5209 SW |
2950 | } else if (r == RESUME_PASSTHROUGH) |
2951 | r = kvmppc_xics_rm_complete(vcpu, 0); | |
e59d24e6 | 2952 | } while (is_kvmppc_resume_guest(r)); |
32fad281 PM |
2953 | |
2954 | out: | |
c7b67670 | 2955 | vcpu->arch.state = KVMPPC_VCPU_NOTREADY; |
32fad281 | 2956 | atomic_dec(&vcpu->kvm->arch.vcpus_running); |
a8606e20 PM |
2957 | return r; |
2958 | } | |
2959 | ||
5b74716e BH |
2960 | static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps, |
2961 | int linux_psize) | |
2962 | { | |
2963 | struct mmu_psize_def *def = &mmu_psize_defs[linux_psize]; | |
2964 | ||
2965 | if (!def->shift) | |
2966 | return; | |
2967 | (*sps)->page_shift = def->shift; | |
2968 | (*sps)->slb_enc = def->sllp; | |
2969 | (*sps)->enc[0].page_shift = def->shift; | |
b1022fbd | 2970 | (*sps)->enc[0].pte_enc = def->penc[linux_psize]; |
1f365bb0 AK |
2971 | /* |
2972 | * Add 16MB MPSS support if host supports it | |
2973 | */ | |
2974 | if (linux_psize != MMU_PAGE_16M && def->penc[MMU_PAGE_16M] != -1) { | |
2975 | (*sps)->enc[1].page_shift = 24; | |
2976 | (*sps)->enc[1].pte_enc = def->penc[MMU_PAGE_16M]; | |
2977 | } | |
5b74716e BH |
2978 | (*sps)++; |
2979 | } | |
2980 | ||
3a167bea AK |
2981 | static int kvm_vm_ioctl_get_smmu_info_hv(struct kvm *kvm, |
2982 | struct kvm_ppc_smmu_info *info) | |
5b74716e BH |
2983 | { |
2984 | struct kvm_ppc_one_seg_page_size *sps; | |
2985 | ||
8cf4ecc0 PM |
2986 | /* |
2987 | * Since we don't yet support HPT guests on a radix host, | |
2988 | * return an error if the host uses radix. | |
2989 | */ | |
2990 | if (radix_enabled()) | |
2991 | return -EINVAL; | |
2992 | ||
5b74716e BH |
2993 | info->flags = KVM_PPC_PAGE_SIZES_REAL; |
2994 | if (mmu_has_feature(MMU_FTR_1T_SEGMENT)) | |
2995 | info->flags |= KVM_PPC_1T_SEGMENTS; | |
2996 | info->slb_size = mmu_slb_size; | |
2997 | ||
2998 | /* We only support these sizes for now, and no muti-size segments */ | |
2999 | sps = &info->sps[0]; | |
3000 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K); | |
3001 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K); | |
3002 | kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M); | |
3003 | ||
3004 | return 0; | |
3005 | } | |
3006 | ||
82ed3616 PM |
3007 | /* |
3008 | * Get (and clear) the dirty memory log for a memory slot. | |
3009 | */ | |
3a167bea AK |
3010 | static int kvm_vm_ioctl_get_dirty_log_hv(struct kvm *kvm, |
3011 | struct kvm_dirty_log *log) | |
82ed3616 | 3012 | { |
9f6b8029 | 3013 | struct kvm_memslots *slots; |
82ed3616 | 3014 | struct kvm_memory_slot *memslot; |
8f7b79b8 | 3015 | int i, r; |
82ed3616 | 3016 | unsigned long n; |
8f7b79b8 PM |
3017 | unsigned long *buf; |
3018 | struct kvm_vcpu *vcpu; | |
82ed3616 PM |
3019 | |
3020 | mutex_lock(&kvm->slots_lock); | |
3021 | ||
3022 | r = -EINVAL; | |
bbacc0c1 | 3023 | if (log->slot >= KVM_USER_MEM_SLOTS) |
82ed3616 PM |
3024 | goto out; |
3025 | ||
9f6b8029 PB |
3026 | slots = kvm_memslots(kvm); |
3027 | memslot = id_to_memslot(slots, log->slot); | |
82ed3616 PM |
3028 | r = -ENOENT; |
3029 | if (!memslot->dirty_bitmap) | |
3030 | goto out; | |
3031 | ||
8f7b79b8 PM |
3032 | /* |
3033 | * Use second half of bitmap area because radix accumulates | |
3034 | * bits in the first half. | |
3035 | */ | |
82ed3616 | 3036 | n = kvm_dirty_bitmap_bytes(memslot); |
8f7b79b8 PM |
3037 | buf = memslot->dirty_bitmap + n / sizeof(long); |
3038 | memset(buf, 0, n); | |
82ed3616 | 3039 | |
8f7b79b8 PM |
3040 | if (kvm_is_radix(kvm)) |
3041 | r = kvmppc_hv_get_dirty_log_radix(kvm, memslot, buf); | |
3042 | else | |
3043 | r = kvmppc_hv_get_dirty_log_hpt(kvm, memslot, buf); | |
82ed3616 PM |
3044 | if (r) |
3045 | goto out; | |
3046 | ||
8f7b79b8 PM |
3047 | /* Harvest dirty bits from VPA and DTL updates */ |
3048 | /* Note: we never modify the SLB shadow buffer areas */ | |
3049 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
3050 | spin_lock(&vcpu->arch.vpa_update_lock); | |
3051 | kvmppc_harvest_vpa_dirty(&vcpu->arch.vpa, memslot, buf); | |
3052 | kvmppc_harvest_vpa_dirty(&vcpu->arch.dtl, memslot, buf); | |
3053 | spin_unlock(&vcpu->arch.vpa_update_lock); | |
3054 | } | |
3055 | ||
82ed3616 | 3056 | r = -EFAULT; |
8f7b79b8 | 3057 | if (copy_to_user(log->dirty_bitmap, buf, n)) |
82ed3616 PM |
3058 | goto out; |
3059 | ||
3060 | r = 0; | |
3061 | out: | |
3062 | mutex_unlock(&kvm->slots_lock); | |
3063 | return r; | |
3064 | } | |
3065 | ||
3a167bea AK |
3066 | static void kvmppc_core_free_memslot_hv(struct kvm_memory_slot *free, |
3067 | struct kvm_memory_slot *dont) | |
a66b48c3 PM |
3068 | { |
3069 | if (!dont || free->arch.rmap != dont->arch.rmap) { | |
3070 | vfree(free->arch.rmap); | |
3071 | free->arch.rmap = NULL; | |
b2b2f165 | 3072 | } |
a66b48c3 PM |
3073 | } |
3074 | ||
3a167bea AK |
3075 | static int kvmppc_core_create_memslot_hv(struct kvm_memory_slot *slot, |
3076 | unsigned long npages) | |
a66b48c3 | 3077 | { |
8cf4ecc0 PM |
3078 | /* |
3079 | * For now, if radix_enabled() then we only support radix guests, | |
3080 | * and in that case we don't need the rmap array. | |
3081 | */ | |
3082 | if (radix_enabled()) { | |
3083 | slot->arch.rmap = NULL; | |
3084 | return 0; | |
3085 | } | |
3086 | ||
a66b48c3 PM |
3087 | slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap)); |
3088 | if (!slot->arch.rmap) | |
3089 | return -ENOMEM; | |
aa04b4cc | 3090 | |
c77162de PM |
3091 | return 0; |
3092 | } | |
aa04b4cc | 3093 | |
3a167bea AK |
3094 | static int kvmppc_core_prepare_memory_region_hv(struct kvm *kvm, |
3095 | struct kvm_memory_slot *memslot, | |
09170a49 | 3096 | const struct kvm_userspace_memory_region *mem) |
c77162de | 3097 | { |
a66b48c3 | 3098 | return 0; |
c77162de PM |
3099 | } |
3100 | ||
3a167bea | 3101 | static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, |
09170a49 | 3102 | const struct kvm_userspace_memory_region *mem, |
f36f3f28 PB |
3103 | const struct kvm_memory_slot *old, |
3104 | const struct kvm_memory_slot *new) | |
c77162de | 3105 | { |
dfe49dbd | 3106 | unsigned long npages = mem->memory_size >> PAGE_SHIFT; |
9f6b8029 | 3107 | struct kvm_memslots *slots; |
dfe49dbd PM |
3108 | struct kvm_memory_slot *memslot; |
3109 | ||
a56ee9f8 YX |
3110 | /* |
3111 | * If we are making a new memslot, it might make | |
3112 | * some address that was previously cached as emulated | |
3113 | * MMIO be no longer emulated MMIO, so invalidate | |
3114 | * all the caches of emulated MMIO translations. | |
3115 | */ | |
3116 | if (npages) | |
3117 | atomic64_inc(&kvm->arch.mmio_update); | |
3118 | ||
8f7b79b8 | 3119 | if (npages && old->npages && !kvm_is_radix(kvm)) { |
dfe49dbd PM |
3120 | /* |
3121 | * If modifying a memslot, reset all the rmap dirty bits. | |
3122 | * If this is a new memslot, we don't need to do anything | |
3123 | * since the rmap array starts out as all zeroes, | |
3124 | * i.e. no pages are dirty. | |
3125 | */ | |
9f6b8029 PB |
3126 | slots = kvm_memslots(kvm); |
3127 | memslot = id_to_memslot(slots, mem->slot); | |
8f7b79b8 | 3128 | kvmppc_hv_get_dirty_log_hpt(kvm, memslot, NULL); |
dfe49dbd | 3129 | } |
c77162de PM |
3130 | } |
3131 | ||
a0144e2a PM |
3132 | /* |
3133 | * Update LPCR values in kvm->arch and in vcores. | |
3134 | * Caller must hold kvm->lock. | |
3135 | */ | |
3136 | void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask) | |
3137 | { | |
3138 | long int i; | |
3139 | u32 cores_done = 0; | |
3140 | ||
3141 | if ((kvm->arch.lpcr & mask) == lpcr) | |
3142 | return; | |
3143 | ||
3144 | kvm->arch.lpcr = (kvm->arch.lpcr & ~mask) | lpcr; | |
3145 | ||
3146 | for (i = 0; i < KVM_MAX_VCORES; ++i) { | |
3147 | struct kvmppc_vcore *vc = kvm->arch.vcores[i]; | |
3148 | if (!vc) | |
3149 | continue; | |
3150 | spin_lock(&vc->lock); | |
3151 | vc->lpcr = (vc->lpcr & ~mask) | lpcr; | |
3152 | spin_unlock(&vc->lock); | |
3153 | if (++cores_done >= kvm->arch.online_vcores) | |
3154 | break; | |
3155 | } | |
3156 | } | |
3157 | ||
3a167bea AK |
3158 | static void kvmppc_mmu_destroy_hv(struct kvm_vcpu *vcpu) |
3159 | { | |
3160 | return; | |
3161 | } | |
3162 | ||
7a84084c PM |
3163 | static void kvmppc_setup_partition_table(struct kvm *kvm) |
3164 | { | |
3165 | unsigned long dw0, dw1; | |
3166 | ||
8cf4ecc0 PM |
3167 | if (!kvm_is_radix(kvm)) { |
3168 | /* PS field - page size for VRMA */ | |
3169 | dw0 = ((kvm->arch.vrma_slb_v & SLB_VSID_L) >> 1) | | |
3170 | ((kvm->arch.vrma_slb_v & SLB_VSID_LP) << 1); | |
3171 | /* HTABSIZE and HTABORG fields */ | |
3172 | dw0 |= kvm->arch.sdr1; | |
7a84084c | 3173 | |
8cf4ecc0 PM |
3174 | /* Second dword as set by userspace */ |
3175 | dw1 = kvm->arch.process_table; | |
3176 | } else { | |
3177 | dw0 = PATB_HR | radix__get_tree_size() | | |
3178 | __pa(kvm->arch.pgtable) | RADIX_PGD_INDEX_SIZE; | |
3179 | dw1 = PATB_GR | kvm->arch.process_table; | |
3180 | } | |
7a84084c PM |
3181 | |
3182 | mmu_partition_table_set_entry(kvm->arch.lpid, dw0, dw1); | |
3183 | } | |
3184 | ||
32fad281 | 3185 | static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu) |
c77162de PM |
3186 | { |
3187 | int err = 0; | |
3188 | struct kvm *kvm = vcpu->kvm; | |
c77162de PM |
3189 | unsigned long hva; |
3190 | struct kvm_memory_slot *memslot; | |
3191 | struct vm_area_struct *vma; | |
a0144e2a | 3192 | unsigned long lpcr = 0, senc; |
c77162de | 3193 | unsigned long psize, porder; |
2c9097e4 | 3194 | int srcu_idx; |
c77162de PM |
3195 | |
3196 | mutex_lock(&kvm->lock); | |
31037eca | 3197 | if (kvm->arch.hpte_setup_done) |
c77162de | 3198 | goto out; /* another vcpu beat us to it */ |
aa04b4cc | 3199 | |
32fad281 | 3200 | /* Allocate hashed page table (if not done already) and reset it */ |
3f9d4f5a | 3201 | if (!kvm->arch.hpt.virt) { |
aae0777f DG |
3202 | int order = KVM_DEFAULT_HPT_ORDER; |
3203 | struct kvm_hpt_info info; | |
3204 | ||
3205 | err = kvmppc_allocate_hpt(&info, order); | |
3206 | /* If we get here, it means userspace didn't specify a | |
3207 | * size explicitly. So, try successively smaller | |
3208 | * sizes if the default failed. */ | |
3209 | while ((err == -ENOMEM) && --order >= PPC_MIN_HPT_ORDER) | |
3210 | err = kvmppc_allocate_hpt(&info, order); | |
3211 | ||
3212 | if (err < 0) { | |
32fad281 PM |
3213 | pr_err("KVM: Couldn't alloc HPT\n"); |
3214 | goto out; | |
3215 | } | |
aae0777f DG |
3216 | |
3217 | kvmppc_set_hpt(kvm, &info); | |
32fad281 PM |
3218 | } |
3219 | ||
c77162de | 3220 | /* Look up the memslot for guest physical address 0 */ |
2c9097e4 | 3221 | srcu_idx = srcu_read_lock(&kvm->srcu); |
c77162de | 3222 | memslot = gfn_to_memslot(kvm, 0); |
aa04b4cc | 3223 | |
c77162de PM |
3224 | /* We must have some memory at 0 by now */ |
3225 | err = -EINVAL; | |
3226 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) | |
2c9097e4 | 3227 | goto out_srcu; |
c77162de PM |
3228 | |
3229 | /* Look up the VMA for the start of this memory slot */ | |
3230 | hva = memslot->userspace_addr; | |
3231 | down_read(¤t->mm->mmap_sem); | |
3232 | vma = find_vma(current->mm, hva); | |
3233 | if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO)) | |
3234 | goto up_out; | |
3235 | ||
3236 | psize = vma_kernel_pagesize(vma); | |
da9d1d7f | 3237 | porder = __ilog2(psize); |
c77162de | 3238 | |
c77162de PM |
3239 | up_read(¤t->mm->mmap_sem); |
3240 | ||
c17b98cf PM |
3241 | /* We can handle 4k, 64k or 16M pages in the VRMA */ |
3242 | err = -EINVAL; | |
3243 | if (!(psize == 0x1000 || psize == 0x10000 || | |
3244 | psize == 0x1000000)) | |
3245 | goto out_srcu; | |
c77162de | 3246 | |
c17b98cf PM |
3247 | senc = slb_pgsize_encoding(psize); |
3248 | kvm->arch.vrma_slb_v = senc | SLB_VSID_B_1T | | |
3249 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
c17b98cf PM |
3250 | /* Create HPTEs in the hash page table for the VRMA */ |
3251 | kvmppc_map_vrma(vcpu, memslot, porder); | |
aa04b4cc | 3252 | |
7a84084c PM |
3253 | /* Update VRMASD field in the LPCR */ |
3254 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) { | |
3255 | /* the -4 is to account for senc values starting at 0x10 */ | |
3256 | lpcr = senc << (LPCR_VRMASD_SH - 4); | |
3257 | kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD); | |
3258 | } else { | |
3259 | kvmppc_setup_partition_table(kvm); | |
3260 | } | |
a0144e2a | 3261 | |
31037eca | 3262 | /* Order updates to kvm->arch.lpcr etc. vs. hpte_setup_done */ |
c77162de | 3263 | smp_wmb(); |
31037eca | 3264 | kvm->arch.hpte_setup_done = 1; |
c77162de | 3265 | err = 0; |
2c9097e4 PM |
3266 | out_srcu: |
3267 | srcu_read_unlock(&kvm->srcu, srcu_idx); | |
c77162de PM |
3268 | out: |
3269 | mutex_unlock(&kvm->lock); | |
3270 | return err; | |
b2b2f165 | 3271 | |
c77162de PM |
3272 | up_out: |
3273 | up_read(¤t->mm->mmap_sem); | |
505d6421 | 3274 | goto out_srcu; |
de56a948 PM |
3275 | } |
3276 | ||
79b6c247 SW |
3277 | #ifdef CONFIG_KVM_XICS |
3278 | /* | |
3279 | * Allocate a per-core structure for managing state about which cores are | |
3280 | * running in the host versus the guest and for exchanging data between | |
3281 | * real mode KVM and CPU running in the host. | |
3282 | * This is only done for the first VM. | |
3283 | * The allocated structure stays even if all VMs have stopped. | |
3284 | * It is only freed when the kvm-hv module is unloaded. | |
3285 | * It's OK for this routine to fail, we just don't support host | |
3286 | * core operations like redirecting H_IPI wakeups. | |
3287 | */ | |
3288 | void kvmppc_alloc_host_rm_ops(void) | |
3289 | { | |
3290 | struct kvmppc_host_rm_ops *ops; | |
3291 | unsigned long l_ops; | |
3292 | int cpu, core; | |
3293 | int size; | |
3294 | ||
3295 | /* Not the first time here ? */ | |
3296 | if (kvmppc_host_rm_ops_hv != NULL) | |
3297 | return; | |
3298 | ||
3299 | ops = kzalloc(sizeof(struct kvmppc_host_rm_ops), GFP_KERNEL); | |
3300 | if (!ops) | |
3301 | return; | |
3302 | ||
3303 | size = cpu_nr_cores() * sizeof(struct kvmppc_host_rm_core); | |
3304 | ops->rm_core = kzalloc(size, GFP_KERNEL); | |
3305 | ||
3306 | if (!ops->rm_core) { | |
3307 | kfree(ops); | |
3308 | return; | |
3309 | } | |
3310 | ||
6f3bb809 SW |
3311 | get_online_cpus(); |
3312 | ||
79b6c247 SW |
3313 | for (cpu = 0; cpu < nr_cpu_ids; cpu += threads_per_core) { |
3314 | if (!cpu_online(cpu)) | |
3315 | continue; | |
3316 | ||
3317 | core = cpu >> threads_shift; | |
3318 | ops->rm_core[core].rm_state.in_host = 1; | |
3319 | } | |
3320 | ||
0c2a6606 SW |
3321 | ops->vcpu_kick = kvmppc_fast_vcpu_kick_hv; |
3322 | ||
79b6c247 SW |
3323 | /* |
3324 | * Make the contents of the kvmppc_host_rm_ops structure visible | |
3325 | * to other CPUs before we assign it to the global variable. | |
3326 | * Do an atomic assignment (no locks used here), but if someone | |
3327 | * beats us to it, just free our copy and return. | |
3328 | */ | |
3329 | smp_wmb(); | |
3330 | l_ops = (unsigned long) ops; | |
3331 | ||
3332 | if (cmpxchg64((unsigned long *)&kvmppc_host_rm_ops_hv, 0, l_ops)) { | |
6f3bb809 | 3333 | put_online_cpus(); |
79b6c247 SW |
3334 | kfree(ops->rm_core); |
3335 | kfree(ops); | |
6f3bb809 | 3336 | return; |
79b6c247 | 3337 | } |
6f3bb809 | 3338 | |
3f7cd919 AMG |
3339 | cpuhp_setup_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE, |
3340 | "ppc/kvm_book3s:prepare", | |
3341 | kvmppc_set_host_core, | |
3342 | kvmppc_clear_host_core); | |
6f3bb809 | 3343 | put_online_cpus(); |
79b6c247 SW |
3344 | } |
3345 | ||
3346 | void kvmppc_free_host_rm_ops(void) | |
3347 | { | |
3348 | if (kvmppc_host_rm_ops_hv) { | |
3f7cd919 | 3349 | cpuhp_remove_state_nocalls(CPUHP_KVM_PPC_BOOK3S_PREPARE); |
79b6c247 SW |
3350 | kfree(kvmppc_host_rm_ops_hv->rm_core); |
3351 | kfree(kvmppc_host_rm_ops_hv); | |
3352 | kvmppc_host_rm_ops_hv = NULL; | |
3353 | } | |
3354 | } | |
3355 | #endif | |
3356 | ||
3a167bea | 3357 | static int kvmppc_core_init_vm_hv(struct kvm *kvm) |
de56a948 | 3358 | { |
32fad281 | 3359 | unsigned long lpcr, lpid; |
e23a808b | 3360 | char buf[32]; |
8cf4ecc0 | 3361 | int ret; |
de56a948 | 3362 | |
32fad281 PM |
3363 | /* Allocate the guest's logical partition ID */ |
3364 | ||
3365 | lpid = kvmppc_alloc_lpid(); | |
5d226ae5 | 3366 | if ((long)lpid < 0) |
32fad281 PM |
3367 | return -ENOMEM; |
3368 | kvm->arch.lpid = lpid; | |
de56a948 | 3369 | |
79b6c247 SW |
3370 | kvmppc_alloc_host_rm_ops(); |
3371 | ||
1b400ba0 PM |
3372 | /* |
3373 | * Since we don't flush the TLB when tearing down a VM, | |
3374 | * and this lpid might have previously been used, | |
3375 | * make sure we flush on each core before running the new VM. | |
7c5b06ca PM |
3376 | * On POWER9, the tlbie in mmu_partition_table_set_entry() |
3377 | * does this flush for us. | |
1b400ba0 | 3378 | */ |
7c5b06ca PM |
3379 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3380 | cpumask_setall(&kvm->arch.need_tlb_flush); | |
1b400ba0 | 3381 | |
699a0ea0 PM |
3382 | /* Start out with the default set of hcalls enabled */ |
3383 | memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls, | |
3384 | sizeof(kvm->arch.enabled_hcalls)); | |
3385 | ||
7a84084c PM |
3386 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3387 | kvm->arch.host_sdr1 = mfspr(SPRN_SDR1); | |
aa04b4cc | 3388 | |
c17b98cf PM |
3389 | /* Init LPCR for virtual RMA mode */ |
3390 | kvm->arch.host_lpid = mfspr(SPRN_LPID); | |
3391 | kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR); | |
3392 | lpcr &= LPCR_PECE | LPCR_LPES; | |
3393 | lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE | | |
3394 | LPCR_VPM0 | LPCR_VPM1; | |
3395 | kvm->arch.vrma_slb_v = SLB_VSID_B_1T | | |
3396 | (VRMA_VSID << SLB_VSID_SHIFT_1T); | |
3397 | /* On POWER8 turn on online bit to enable PURR/SPURR */ | |
3398 | if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
3399 | lpcr |= LPCR_ONL; | |
84f7139c PM |
3400 | /* |
3401 | * On POWER9, VPM0 bit is reserved (VPM0=1 behaviour is assumed) | |
3402 | * Set HVICE bit to enable hypervisor virtualization interrupts. | |
3403 | */ | |
3404 | if (cpu_has_feature(CPU_FTR_ARCH_300)) { | |
7a84084c | 3405 | lpcr &= ~LPCR_VPM0; |
84f7139c PM |
3406 | lpcr |= LPCR_HVICE; |
3407 | } | |
3408 | ||
8cf4ecc0 PM |
3409 | /* |
3410 | * For now, if the host uses radix, the guest must be radix. | |
3411 | */ | |
3412 | if (radix_enabled()) { | |
3413 | kvm->arch.radix = 1; | |
3414 | lpcr &= ~LPCR_VPM1; | |
3415 | lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR; | |
3416 | ret = kvmppc_init_vm_radix(kvm); | |
3417 | if (ret) { | |
3418 | kvmppc_free_lpid(kvm->arch.lpid); | |
3419 | return ret; | |
3420 | } | |
3421 | kvmppc_setup_partition_table(kvm); | |
3422 | } | |
3423 | ||
9e368f29 | 3424 | kvm->arch.lpcr = lpcr; |
aa04b4cc | 3425 | |
5e985969 DG |
3426 | /* Initialization for future HPT resizes */ |
3427 | kvm->arch.resize_hpt = NULL; | |
3428 | ||
7c5b06ca PM |
3429 | /* |
3430 | * Work out how many sets the TLB has, for the use of | |
3431 | * the TLB invalidation loop in book3s_hv_rmhandlers.S. | |
3432 | */ | |
8cf4ecc0 PM |
3433 | if (kvm_is_radix(kvm)) |
3434 | kvm->arch.tlb_sets = POWER9_TLB_SETS_RADIX; /* 128 */ | |
3435 | else if (cpu_has_feature(CPU_FTR_ARCH_300)) | |
7c5b06ca PM |
3436 | kvm->arch.tlb_sets = POWER9_TLB_SETS_HASH; /* 256 */ |
3437 | else if (cpu_has_feature(CPU_FTR_ARCH_207S)) | |
3438 | kvm->arch.tlb_sets = POWER8_TLB_SETS; /* 512 */ | |
3439 | else | |
3440 | kvm->arch.tlb_sets = POWER7_TLB_SETS; /* 128 */ | |
3441 | ||
512691d4 | 3442 | /* |
441c19c8 ME |
3443 | * Track that we now have a HV mode VM active. This blocks secondary |
3444 | * CPU threads from coming online. | |
8cf4ecc0 PM |
3445 | * On POWER9, we only need to do this for HPT guests on a radix |
3446 | * host, which is not yet supported. | |
512691d4 | 3447 | */ |
8cf4ecc0 PM |
3448 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3449 | kvm_hv_vm_activated(); | |
512691d4 | 3450 | |
e23a808b PM |
3451 | /* |
3452 | * Create a debugfs directory for the VM | |
3453 | */ | |
3454 | snprintf(buf, sizeof(buf), "vm%d", current->pid); | |
3455 | kvm->arch.debugfs_dir = debugfs_create_dir(buf, kvm_debugfs_dir); | |
3456 | if (!IS_ERR_OR_NULL(kvm->arch.debugfs_dir)) | |
3457 | kvmppc_mmu_debugfs_init(kvm); | |
3458 | ||
54738c09 | 3459 | return 0; |
de56a948 PM |
3460 | } |
3461 | ||
f1378b1c PM |
3462 | static void kvmppc_free_vcores(struct kvm *kvm) |
3463 | { | |
3464 | long int i; | |
3465 | ||
23316316 | 3466 | for (i = 0; i < KVM_MAX_VCORES; ++i) |
f1378b1c PM |
3467 | kfree(kvm->arch.vcores[i]); |
3468 | kvm->arch.online_vcores = 0; | |
3469 | } | |
3470 | ||
3a167bea | 3471 | static void kvmppc_core_destroy_vm_hv(struct kvm *kvm) |
de56a948 | 3472 | { |
e23a808b PM |
3473 | debugfs_remove_recursive(kvm->arch.debugfs_dir); |
3474 | ||
8cf4ecc0 PM |
3475 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) |
3476 | kvm_hv_vm_deactivated(); | |
512691d4 | 3477 | |
f1378b1c | 3478 | kvmppc_free_vcores(kvm); |
aa04b4cc | 3479 | |
8cf4ecc0 PM |
3480 | kvmppc_free_lpid(kvm->arch.lpid); |
3481 | ||
5a319350 PM |
3482 | if (kvm_is_radix(kvm)) |
3483 | kvmppc_free_radix(kvm); | |
3484 | else | |
aae0777f | 3485 | kvmppc_free_hpt(&kvm->arch.hpt); |
c57875f5 SW |
3486 | |
3487 | kvmppc_free_pimap(kvm); | |
de56a948 PM |
3488 | } |
3489 | ||
3a167bea AK |
3490 | /* We don't need to emulate any privileged instructions or dcbz */ |
3491 | static int kvmppc_core_emulate_op_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
3492 | unsigned int inst, int *advance) | |
de56a948 | 3493 | { |
3a167bea | 3494 | return EMULATE_FAIL; |
de56a948 PM |
3495 | } |
3496 | ||
3a167bea AK |
3497 | static int kvmppc_core_emulate_mtspr_hv(struct kvm_vcpu *vcpu, int sprn, |
3498 | ulong spr_val) | |
de56a948 PM |
3499 | { |
3500 | return EMULATE_FAIL; | |
3501 | } | |
3502 | ||
3a167bea AK |
3503 | static int kvmppc_core_emulate_mfspr_hv(struct kvm_vcpu *vcpu, int sprn, |
3504 | ulong *spr_val) | |
de56a948 PM |
3505 | { |
3506 | return EMULATE_FAIL; | |
3507 | } | |
3508 | ||
3a167bea | 3509 | static int kvmppc_core_check_processor_compat_hv(void) |
de56a948 | 3510 | { |
c17b98cf PM |
3511 | if (!cpu_has_feature(CPU_FTR_HVMODE) || |
3512 | !cpu_has_feature(CPU_FTR_ARCH_206)) | |
3a167bea | 3513 | return -EIO; |
50de596d | 3514 | |
3a167bea | 3515 | return 0; |
de56a948 PM |
3516 | } |
3517 | ||
8daaafc8 SW |
3518 | #ifdef CONFIG_KVM_XICS |
3519 | ||
3520 | void kvmppc_free_pimap(struct kvm *kvm) | |
3521 | { | |
3522 | kfree(kvm->arch.pimap); | |
3523 | } | |
3524 | ||
c57875f5 | 3525 | static struct kvmppc_passthru_irqmap *kvmppc_alloc_pimap(void) |
8daaafc8 SW |
3526 | { |
3527 | return kzalloc(sizeof(struct kvmppc_passthru_irqmap), GFP_KERNEL); | |
3528 | } | |
c57875f5 SW |
3529 | |
3530 | static int kvmppc_set_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) | |
3531 | { | |
3532 | struct irq_desc *desc; | |
3533 | struct kvmppc_irq_map *irq_map; | |
3534 | struct kvmppc_passthru_irqmap *pimap; | |
3535 | struct irq_chip *chip; | |
3536 | int i; | |
3537 | ||
644abbb2 SW |
3538 | if (!kvm_irq_bypass) |
3539 | return 1; | |
3540 | ||
c57875f5 SW |
3541 | desc = irq_to_desc(host_irq); |
3542 | if (!desc) | |
3543 | return -EIO; | |
3544 | ||
3545 | mutex_lock(&kvm->lock); | |
3546 | ||
3547 | pimap = kvm->arch.pimap; | |
3548 | if (pimap == NULL) { | |
3549 | /* First call, allocate structure to hold IRQ map */ | |
3550 | pimap = kvmppc_alloc_pimap(); | |
3551 | if (pimap == NULL) { | |
3552 | mutex_unlock(&kvm->lock); | |
3553 | return -ENOMEM; | |
3554 | } | |
3555 | kvm->arch.pimap = pimap; | |
3556 | } | |
3557 | ||
3558 | /* | |
3559 | * For now, we only support interrupts for which the EOI operation | |
3560 | * is an OPAL call followed by a write to XIRR, since that's | |
3561 | * what our real-mode EOI code does. | |
3562 | */ | |
3563 | chip = irq_data_get_irq_chip(&desc->irq_data); | |
3564 | if (!chip || !is_pnv_opal_msi(chip)) { | |
3565 | pr_warn("kvmppc_set_passthru_irq_hv: Could not assign IRQ map for (%d,%d)\n", | |
3566 | host_irq, guest_gsi); | |
3567 | mutex_unlock(&kvm->lock); | |
3568 | return -ENOENT; | |
3569 | } | |
3570 | ||
3571 | /* | |
3572 | * See if we already have an entry for this guest IRQ number. | |
3573 | * If it's mapped to a hardware IRQ number, that's an error, | |
3574 | * otherwise re-use this entry. | |
3575 | */ | |
3576 | for (i = 0; i < pimap->n_mapped; i++) { | |
3577 | if (guest_gsi == pimap->mapped[i].v_hwirq) { | |
3578 | if (pimap->mapped[i].r_hwirq) { | |
3579 | mutex_unlock(&kvm->lock); | |
3580 | return -EINVAL; | |
3581 | } | |
3582 | break; | |
3583 | } | |
3584 | } | |
3585 | ||
3586 | if (i == KVMPPC_PIRQ_MAPPED) { | |
3587 | mutex_unlock(&kvm->lock); | |
3588 | return -EAGAIN; /* table is full */ | |
3589 | } | |
3590 | ||
3591 | irq_map = &pimap->mapped[i]; | |
3592 | ||
3593 | irq_map->v_hwirq = guest_gsi; | |
c57875f5 SW |
3594 | irq_map->desc = desc; |
3595 | ||
e3c13e56 SW |
3596 | /* |
3597 | * Order the above two stores before the next to serialize with | |
3598 | * the KVM real mode handler. | |
3599 | */ | |
3600 | smp_wmb(); | |
3601 | irq_map->r_hwirq = desc->irq_data.hwirq; | |
3602 | ||
c57875f5 SW |
3603 | if (i == pimap->n_mapped) |
3604 | pimap->n_mapped++; | |
3605 | ||
5d375199 PM |
3606 | kvmppc_xics_set_mapped(kvm, guest_gsi, desc->irq_data.hwirq); |
3607 | ||
c57875f5 SW |
3608 | mutex_unlock(&kvm->lock); |
3609 | ||
3610 | return 0; | |
3611 | } | |
3612 | ||
3613 | static int kvmppc_clr_passthru_irq(struct kvm *kvm, int host_irq, int guest_gsi) | |
3614 | { | |
3615 | struct irq_desc *desc; | |
3616 | struct kvmppc_passthru_irqmap *pimap; | |
3617 | int i; | |
3618 | ||
644abbb2 SW |
3619 | if (!kvm_irq_bypass) |
3620 | return 0; | |
3621 | ||
c57875f5 SW |
3622 | desc = irq_to_desc(host_irq); |
3623 | if (!desc) | |
3624 | return -EIO; | |
3625 | ||
3626 | mutex_lock(&kvm->lock); | |
a1c52e1c ME |
3627 | if (!kvm->arch.pimap) |
3628 | goto unlock; | |
c57875f5 | 3629 | |
c57875f5 SW |
3630 | pimap = kvm->arch.pimap; |
3631 | ||
3632 | for (i = 0; i < pimap->n_mapped; i++) { | |
3633 | if (guest_gsi == pimap->mapped[i].v_hwirq) | |
3634 | break; | |
3635 | } | |
3636 | ||
3637 | if (i == pimap->n_mapped) { | |
3638 | mutex_unlock(&kvm->lock); | |
3639 | return -ENODEV; | |
3640 | } | |
3641 | ||
5d375199 PM |
3642 | kvmppc_xics_clr_mapped(kvm, guest_gsi, pimap->mapped[i].r_hwirq); |
3643 | ||
c57875f5 SW |
3644 | /* invalidate the entry */ |
3645 | pimap->mapped[i].r_hwirq = 0; | |
3646 | ||
3647 | /* | |
3648 | * We don't free this structure even when the count goes to | |
3649 | * zero. The structure is freed when we destroy the VM. | |
3650 | */ | |
a1c52e1c | 3651 | unlock: |
c57875f5 SW |
3652 | mutex_unlock(&kvm->lock); |
3653 | return 0; | |
3654 | } | |
3655 | ||
3656 | static int kvmppc_irq_bypass_add_producer_hv(struct irq_bypass_consumer *cons, | |
3657 | struct irq_bypass_producer *prod) | |
3658 | { | |
3659 | int ret = 0; | |
3660 | struct kvm_kernel_irqfd *irqfd = | |
3661 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
3662 | ||
3663 | irqfd->producer = prod; | |
3664 | ||
3665 | ret = kvmppc_set_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); | |
3666 | if (ret) | |
3667 | pr_info("kvmppc_set_passthru_irq (irq %d, gsi %d) fails: %d\n", | |
3668 | prod->irq, irqfd->gsi, ret); | |
3669 | ||
3670 | return ret; | |
3671 | } | |
3672 | ||
3673 | static void kvmppc_irq_bypass_del_producer_hv(struct irq_bypass_consumer *cons, | |
3674 | struct irq_bypass_producer *prod) | |
3675 | { | |
3676 | int ret; | |
3677 | struct kvm_kernel_irqfd *irqfd = | |
3678 | container_of(cons, struct kvm_kernel_irqfd, consumer); | |
3679 | ||
3680 | irqfd->producer = NULL; | |
3681 | ||
3682 | /* | |
3683 | * When producer of consumer is unregistered, we change back to | |
3684 | * default external interrupt handling mode - KVM real mode | |
3685 | * will switch back to host. | |
3686 | */ | |
3687 | ret = kvmppc_clr_passthru_irq(irqfd->kvm, prod->irq, irqfd->gsi); | |
3688 | if (ret) | |
3689 | pr_warn("kvmppc_clr_passthru_irq (irq %d, gsi %d) fails: %d\n", | |
3690 | prod->irq, irqfd->gsi, ret); | |
3691 | } | |
8daaafc8 SW |
3692 | #endif |
3693 | ||
3a167bea AK |
3694 | static long kvm_arch_vm_ioctl_hv(struct file *filp, |
3695 | unsigned int ioctl, unsigned long arg) | |
3696 | { | |
3697 | struct kvm *kvm __maybe_unused = filp->private_data; | |
3698 | void __user *argp = (void __user *)arg; | |
3699 | long r; | |
3700 | ||
3701 | switch (ioctl) { | |
3702 | ||
3a167bea AK |
3703 | case KVM_PPC_ALLOCATE_HTAB: { |
3704 | u32 htab_order; | |
3705 | ||
3706 | r = -EFAULT; | |
3707 | if (get_user(htab_order, (u32 __user *)argp)) | |
3708 | break; | |
f98a8bf9 | 3709 | r = kvmppc_alloc_reset_hpt(kvm, htab_order); |
3a167bea AK |
3710 | if (r) |
3711 | break; | |
3a167bea AK |
3712 | r = 0; |
3713 | break; | |
3714 | } | |
3715 | ||
3716 | case KVM_PPC_GET_HTAB_FD: { | |
3717 | struct kvm_get_htab_fd ghf; | |
3718 | ||
3719 | r = -EFAULT; | |
3720 | if (copy_from_user(&ghf, argp, sizeof(ghf))) | |
3721 | break; | |
3722 | r = kvm_vm_ioctl_get_htab_fd(kvm, &ghf); | |
3723 | break; | |
3724 | } | |
3725 | ||
5e985969 DG |
3726 | case KVM_PPC_RESIZE_HPT_PREPARE: { |
3727 | struct kvm_ppc_resize_hpt rhpt; | |
3728 | ||
3729 | r = -EFAULT; | |
3730 | if (copy_from_user(&rhpt, argp, sizeof(rhpt))) | |
3731 | break; | |
3732 | ||
3733 | r = kvm_vm_ioctl_resize_hpt_prepare(kvm, &rhpt); | |
3734 | break; | |
3735 | } | |
3736 | ||
3737 | case KVM_PPC_RESIZE_HPT_COMMIT: { | |
3738 | struct kvm_ppc_resize_hpt rhpt; | |
3739 | ||
3740 | r = -EFAULT; | |
3741 | if (copy_from_user(&rhpt, argp, sizeof(rhpt))) | |
3742 | break; | |
3743 | ||
3744 | r = kvm_vm_ioctl_resize_hpt_commit(kvm, &rhpt); | |
3745 | break; | |
3746 | } | |
3747 | ||
3a167bea AK |
3748 | default: |
3749 | r = -ENOTTY; | |
3750 | } | |
3751 | ||
3752 | return r; | |
3753 | } | |
3754 | ||
699a0ea0 PM |
3755 | /* |
3756 | * List of hcall numbers to enable by default. | |
3757 | * For compatibility with old userspace, we enable by default | |
3758 | * all hcalls that were implemented before the hcall-enabling | |
3759 | * facility was added. Note this list should not include H_RTAS. | |
3760 | */ | |
3761 | static unsigned int default_hcall_list[] = { | |
3762 | H_REMOVE, | |
3763 | H_ENTER, | |
3764 | H_READ, | |
3765 | H_PROTECT, | |
3766 | H_BULK_REMOVE, | |
3767 | H_GET_TCE, | |
3768 | H_PUT_TCE, | |
3769 | H_SET_DABR, | |
3770 | H_SET_XDABR, | |
3771 | H_CEDE, | |
3772 | H_PROD, | |
3773 | H_CONFER, | |
3774 | H_REGISTER_VPA, | |
3775 | #ifdef CONFIG_KVM_XICS | |
3776 | H_EOI, | |
3777 | H_CPPR, | |
3778 | H_IPI, | |
3779 | H_IPOLL, | |
3780 | H_XIRR, | |
3781 | H_XIRR_X, | |
3782 | #endif | |
3783 | 0 | |
3784 | }; | |
3785 | ||
3786 | static void init_default_hcalls(void) | |
3787 | { | |
3788 | int i; | |
ae2113a4 | 3789 | unsigned int hcall; |
699a0ea0 | 3790 | |
ae2113a4 PM |
3791 | for (i = 0; default_hcall_list[i]; ++i) { |
3792 | hcall = default_hcall_list[i]; | |
3793 | WARN_ON(!kvmppc_hcall_impl_hv(hcall)); | |
3794 | __set_bit(hcall / 4, default_enabled_hcalls); | |
3795 | } | |
699a0ea0 PM |
3796 | } |
3797 | ||
c9270132 PM |
3798 | static int kvmhv_configure_mmu(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg) |
3799 | { | |
468808bd | 3800 | unsigned long lpcr; |
8cf4ecc0 | 3801 | int radix; |
468808bd PM |
3802 | |
3803 | /* If not on a POWER9, reject it */ | |
3804 | if (!cpu_has_feature(CPU_FTR_ARCH_300)) | |
3805 | return -ENODEV; | |
3806 | ||
3807 | /* If any unknown flags set, reject it */ | |
3808 | if (cfg->flags & ~(KVM_PPC_MMUV3_RADIX | KVM_PPC_MMUV3_GTSE)) | |
3809 | return -EINVAL; | |
3810 | ||
8cf4ecc0 PM |
3811 | /* We can't change a guest to/from radix yet */ |
3812 | radix = !!(cfg->flags & KVM_PPC_MMUV3_RADIX); | |
3813 | if (radix != kvm_is_radix(kvm)) | |
468808bd PM |
3814 | return -EINVAL; |
3815 | ||
3816 | /* GR (guest radix) bit in process_table field must match */ | |
8cf4ecc0 | 3817 | if (!!(cfg->process_table & PATB_GR) != radix) |
468808bd PM |
3818 | return -EINVAL; |
3819 | ||
3820 | /* Process table size field must be reasonable, i.e. <= 24 */ | |
3821 | if ((cfg->process_table & PRTS_MASK) > 24) | |
3822 | return -EINVAL; | |
3823 | ||
3824 | kvm->arch.process_table = cfg->process_table; | |
3825 | kvmppc_setup_partition_table(kvm); | |
3826 | ||
3827 | lpcr = (cfg->flags & KVM_PPC_MMUV3_GTSE) ? LPCR_GTSE : 0; | |
3828 | kvmppc_update_lpcr(kvm, lpcr, LPCR_GTSE); | |
3829 | ||
3830 | return 0; | |
c9270132 PM |
3831 | } |
3832 | ||
cbbc58d4 | 3833 | static struct kvmppc_ops kvm_ops_hv = { |
3a167bea AK |
3834 | .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv, |
3835 | .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv, | |
3836 | .get_one_reg = kvmppc_get_one_reg_hv, | |
3837 | .set_one_reg = kvmppc_set_one_reg_hv, | |
3838 | .vcpu_load = kvmppc_core_vcpu_load_hv, | |
3839 | .vcpu_put = kvmppc_core_vcpu_put_hv, | |
3840 | .set_msr = kvmppc_set_msr_hv, | |
3841 | .vcpu_run = kvmppc_vcpu_run_hv, | |
3842 | .vcpu_create = kvmppc_core_vcpu_create_hv, | |
3843 | .vcpu_free = kvmppc_core_vcpu_free_hv, | |
3844 | .check_requests = kvmppc_core_check_requests_hv, | |
3845 | .get_dirty_log = kvm_vm_ioctl_get_dirty_log_hv, | |
3846 | .flush_memslot = kvmppc_core_flush_memslot_hv, | |
3847 | .prepare_memory_region = kvmppc_core_prepare_memory_region_hv, | |
3848 | .commit_memory_region = kvmppc_core_commit_memory_region_hv, | |
3849 | .unmap_hva = kvm_unmap_hva_hv, | |
3850 | .unmap_hva_range = kvm_unmap_hva_range_hv, | |
3851 | .age_hva = kvm_age_hva_hv, | |
3852 | .test_age_hva = kvm_test_age_hva_hv, | |
3853 | .set_spte_hva = kvm_set_spte_hva_hv, | |
3854 | .mmu_destroy = kvmppc_mmu_destroy_hv, | |
3855 | .free_memslot = kvmppc_core_free_memslot_hv, | |
3856 | .create_memslot = kvmppc_core_create_memslot_hv, | |
3857 | .init_vm = kvmppc_core_init_vm_hv, | |
3858 | .destroy_vm = kvmppc_core_destroy_vm_hv, | |
3a167bea AK |
3859 | .get_smmu_info = kvm_vm_ioctl_get_smmu_info_hv, |
3860 | .emulate_op = kvmppc_core_emulate_op_hv, | |
3861 | .emulate_mtspr = kvmppc_core_emulate_mtspr_hv, | |
3862 | .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, | |
3863 | .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, | |
3864 | .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, | |
ae2113a4 | 3865 | .hcall_implemented = kvmppc_hcall_impl_hv, |
c57875f5 SW |
3866 | #ifdef CONFIG_KVM_XICS |
3867 | .irq_bypass_add_producer = kvmppc_irq_bypass_add_producer_hv, | |
3868 | .irq_bypass_del_producer = kvmppc_irq_bypass_del_producer_hv, | |
3869 | #endif | |
c9270132 PM |
3870 | .configure_mmu = kvmhv_configure_mmu, |
3871 | .get_rmmu_info = kvmhv_get_rmmu_info, | |
3a167bea AK |
3872 | }; |
3873 | ||
fd7bacbc MS |
3874 | static int kvm_init_subcore_bitmap(void) |
3875 | { | |
3876 | int i, j; | |
3877 | int nr_cores = cpu_nr_cores(); | |
3878 | struct sibling_subcore_state *sibling_subcore_state; | |
3879 | ||
3880 | for (i = 0; i < nr_cores; i++) { | |
3881 | int first_cpu = i * threads_per_core; | |
3882 | int node = cpu_to_node(first_cpu); | |
3883 | ||
3884 | /* Ignore if it is already allocated. */ | |
3885 | if (paca[first_cpu].sibling_subcore_state) | |
3886 | continue; | |
3887 | ||
3888 | sibling_subcore_state = | |
3889 | kmalloc_node(sizeof(struct sibling_subcore_state), | |
3890 | GFP_KERNEL, node); | |
3891 | if (!sibling_subcore_state) | |
3892 | return -ENOMEM; | |
3893 | ||
3894 | memset(sibling_subcore_state, 0, | |
3895 | sizeof(struct sibling_subcore_state)); | |
3896 | ||
3897 | for (j = 0; j < threads_per_core; j++) { | |
3898 | int cpu = first_cpu + j; | |
3899 | ||
3900 | paca[cpu].sibling_subcore_state = sibling_subcore_state; | |
3901 | } | |
3902 | } | |
3903 | return 0; | |
3904 | } | |
3905 | ||
5a319350 PM |
3906 | static int kvmppc_radix_possible(void) |
3907 | { | |
3908 | return cpu_has_feature(CPU_FTR_ARCH_300) && radix_enabled(); | |
3909 | } | |
3910 | ||
3a167bea | 3911 | static int kvmppc_book3s_init_hv(void) |
de56a948 PM |
3912 | { |
3913 | int r; | |
cbbc58d4 AK |
3914 | /* |
3915 | * FIXME!! Do we need to check on all cpus ? | |
3916 | */ | |
3917 | r = kvmppc_core_check_processor_compat_hv(); | |
3918 | if (r < 0) | |
739e2425 | 3919 | return -ENODEV; |
de56a948 | 3920 | |
fd7bacbc MS |
3921 | r = kvm_init_subcore_bitmap(); |
3922 | if (r) | |
3923 | return r; | |
3924 | ||
f725758b PM |
3925 | /* |
3926 | * We need a way of accessing the XICS interrupt controller, | |
3927 | * either directly, via paca[cpu].kvm_hstate.xics_phys, or | |
3928 | * indirectly, via OPAL. | |
3929 | */ | |
3930 | #ifdef CONFIG_SMP | |
db4b0dfa | 3931 | if (!local_paca->kvm_hstate.xics_phys) { |
f725758b PM |
3932 | struct device_node *np; |
3933 | ||
3934 | np = of_find_compatible_node(NULL, NULL, "ibm,opal-intc"); | |
3935 | if (!np) { | |
3936 | pr_err("KVM-HV: Cannot determine method for accessing XICS\n"); | |
3937 | return -ENODEV; | |
3938 | } | |
3939 | } | |
3940 | #endif | |
3941 | ||
cbbc58d4 AK |
3942 | kvm_ops_hv.owner = THIS_MODULE; |
3943 | kvmppc_hv_ops = &kvm_ops_hv; | |
de56a948 | 3944 | |
699a0ea0 PM |
3945 | init_default_hcalls(); |
3946 | ||
ec257165 PM |
3947 | init_vcore_lists(); |
3948 | ||
cbbc58d4 | 3949 | r = kvmppc_mmu_hv_init(); |
5a319350 PM |
3950 | if (r) |
3951 | return r; | |
3952 | ||
3953 | if (kvmppc_radix_possible()) | |
3954 | r = kvmppc_radix_init(); | |
de56a948 PM |
3955 | return r; |
3956 | } | |
3957 | ||
3a167bea | 3958 | static void kvmppc_book3s_exit_hv(void) |
de56a948 | 3959 | { |
79b6c247 | 3960 | kvmppc_free_host_rm_ops(); |
5a319350 PM |
3961 | if (kvmppc_radix_possible()) |
3962 | kvmppc_radix_exit(); | |
cbbc58d4 | 3963 | kvmppc_hv_ops = NULL; |
de56a948 PM |
3964 | } |
3965 | ||
3a167bea AK |
3966 | module_init(kvmppc_book3s_init_hv); |
3967 | module_exit(kvmppc_book3s_exit_hv); | |
2ba9f0d8 | 3968 | MODULE_LICENSE("GPL"); |
398a76c6 AG |
3969 | MODULE_ALIAS_MISCDEV(KVM_MINOR); |
3970 | MODULE_ALIAS("devname:kvm"); | |
7c5b06ca | 3971 |